Re: meson-gx-mmc: 2nd patch set

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 16.03.2017 um 22:12 schrieb Helmut Klein:
> Hallo Heiner,
> 
> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
> 
> The performance of the sd-card and the mmc-chip of my minimx is much better now.
> 
> sd-card: from 6.5 to 22.5 MBytes/s
> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
> 
> But:
> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
> 
> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
> 
Thanks for testing and sharing the feedback. Much appreciated.
The board I test on supports block devices only.

Could you please share few more details:
- Drivers involved
- All syslog messages related to the device / driver

And please set the relevant mailing lists on cc when providing test feedback.
Others might find your feedback helpful too.

Thanks, Heiner

> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
> 
> regards
> Helmut
> 

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 16.03.2017 um 22:12 schrieb Helmut Klein:
> Hallo Heiner,
> 
> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
> 
> The performance of the sd-card and the mmc-chip of my minimx is much better now.
> 
> sd-card: from 6.5 to 22.5 MBytes/s
> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
> 
> But:
> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
> 
> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
> 
Thanks for testing and sharing the feedback. Much appreciated.
The board I test on supports block devices only.

Could you please share few more details:
- Drivers involved
- All syslog messages related to the device / driver

And please set the relevant mailing lists on cc when providing test feedback.
Others might find your feedback helpful too.

Thanks, Heiner

> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
> 
> regards
> Helmut
> 

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 17.03.2017 07:44, Heiner Kallweit wrote:
> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>> Hallo Heiner,
>>
>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>
>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>
>> sd-card: from 6.5 to 22.5 MBytes/s
>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>
>> But:
>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>
>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>
> Thanks for testing and sharing the feedback. Much appreciated.
> The board I test on supports block devices only.
>
> Could you please share few more details:
> - Drivers involved
> - All syslog messages related to the device / driver
>
> And please set the relevant mailing lists on cc when providing test feedback.
> Others might find your feedback helpful too.
>
> Thanks, Heiner
>
>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>
>> regards
>> Helmut
>>
>
>

The driver for the wifi adapter is brcmfmac. It is compiled as a module 
and loaded via /etc/modules.
the driver depends on the modules brcmutil and cfg80211, which are auto 
loaded.

my user space is debian unstable. The kernel is cross compiled on my 
x86-64 laptop with gcc 5.4.1

i use my own kernel configuration without an initial ramdisk. mmc, usb & 
ext4 drivers are compiled into the kernel

kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)

the drive for the kernel is sda2 (sd-card inside of a usb card reader).


here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 
2 are applied

[    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
[    1.873010] mmc0: new DDR MMC card at address 0001
[    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
[    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
[    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
[    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
[    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
[    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    2.124761] mmc2: Skipping voltage switch
[    2.153763] mmc1: new high speed SDIO card at address 0001
[    2.158567] mmc2: new high speed SDHC card at address 59b4
[    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
[    2.164206]  mmcblk2: p1 p2
[    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: 
Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
[    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code 
(0x30 0x30)
[    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 184
[    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 188
[    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 192
[    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 196
[    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 200
[    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code 
(0x30 0x30)
[    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 204
[    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 208

this is the output after adding patch 3

[    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
[    1.873041] mmc0: new DDR MMC card at address 0001
[    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
[    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
[    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
[    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
[    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
[    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    2.124874] mmc2: Skipping voltage switch
[    2.153475] mmc1: new high speed SDIO card at address 0001
[    2.158610] mmc2: new high speed SDHC card at address 59b4
[    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
[    2.163910]  mmcblk2: p1 p2
[    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed 
<<<=====
[    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on 
writing 239507 membytes at 0x00000000
[    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file 
download failed

and this is the output after adding patches 4 & 5

[    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
[    1.868910] mmc0: new DDR MMC card at address 0001
[    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
[    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
[    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
[    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB 
<<<=====
[    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
[    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
[    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    2.120693] mmc2: Skipping voltage switch
[    2.148795] mmc1: new high speed SDIO card at address 0001
[    2.154443] mmc2: new high speed SDHC card at address 59b4
[    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
[    2.159402]  mmcblk2: p1 p2
[    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not 
supported     <<<=====
[    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
[    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
[    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...

regards
Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 17.03.2017 07:44, Heiner Kallweit wrote:
> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>> Hallo Heiner,
>>
>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>
>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>
>> sd-card: from 6.5 to 22.5 MBytes/s
>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>
>> But:
>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>
>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>
> Thanks for testing and sharing the feedback. Much appreciated.
> The board I test on supports block devices only.
>
> Could you please share few more details:
> - Drivers involved
> - All syslog messages related to the device / driver
>
> And please set the relevant mailing lists on cc when providing test feedback.
> Others might find your feedback helpful too.
>
> Thanks, Heiner
>
>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>
>> regards
>> Helmut
>>
>
>

The driver for the wifi adapter is brcmfmac. It is compiled as a module 
and loaded via /etc/modules.
the driver depends on the modules brcmutil and cfg80211, which are auto 
loaded.

my user space is debian unstable. The kernel is cross compiled on my 
x86-64 laptop with gcc 5.4.1

i use my own kernel configuration without an initial ramdisk. mmc, usb & 
ext4 drivers are compiled into the kernel

kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)

the drive for the kernel is sda2 (sd-card inside of a usb card reader).


here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 
2 are applied

[    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
[    1.873010] mmc0: new DDR MMC card at address 0001
[    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
[    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
[    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
[    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
[    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
[    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    2.124761] mmc2: Skipping voltage switch
[    2.153763] mmc1: new high speed SDIO card at address 0001
[    2.158567] mmc2: new high speed SDHC card at address 59b4
[    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
[    2.164206]  mmcblk2: p1 p2
[    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: 
Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
[    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code 
(0x30 0x30)
[    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 184
[    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 188
[    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 192
[    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 196
[    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 200
[    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code 
(0x30 0x30)
[    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 204
[    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected 
firmware channel 208

this is the output after adding patch 3

[    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
[    1.873041] mmc0: new DDR MMC card at address 0001
[    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
[    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
[    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
[    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
[    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
[    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    2.124874] mmc2: Skipping voltage switch
[    2.153475] mmc1: new high speed SDIO card at address 0001
[    2.158610] mmc2: new high speed SDHC card at address 59b4
[    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
[    2.163910]  mmcblk2: p1 p2
[    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed 
<<<=====
[    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on 
writing 239507 membytes at 0x00000000
[    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file 
download failed

and this is the output after adding patches 4 & 5

[    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
[    1.868910] mmc0: new DDR MMC card at address 0001
[    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
[    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
[    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
[    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB 
<<<=====
[    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
[    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
[    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[    2.120693] mmc2: Skipping voltage switch
[    2.148795] mmc1: new high speed SDIO card at address 0001
[    2.154443] mmc2: new high speed SDHC card@address 59b4
[    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
[    2.159402]  mmcblk2: p1 p2
[    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not 
supported     <<<=====
[    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
[    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
[    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...

regards
Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 17.03.2017 um 19:00 schrieb Helmut Klein:
> On 17.03.2017 07:44, Heiner Kallweit wrote:
>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>> Hallo Heiner,
>>>
>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>
>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>
>>> sd-card: from 6.5 to 22.5 MBytes/s
>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>
>>> But:
>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>
>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>
>> Thanks for testing and sharing the feedback. Much appreciated.
>> The board I test on supports block devices only.
>>
>> Could you please share few more details:
>> - Drivers involved
>> - All syslog messages related to the device / driver
>>
>> And please set the relevant mailing lists on cc when providing test feedback.
>> Others might find your feedback helpful too.
>>
>> Thanks, Heiner
>>
>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>
>>> regards
>>> Helmut
>>>
>>
>>
> 
> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
> 
> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
> 
> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
> 
> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
> 
> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
> 
> 
> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
> 
> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
> [    1.873010] mmc0: new DDR MMC card at address 0001
> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
> [    2.124761] mmc2: Skipping voltage switch
> [    2.153763] mmc1: new high speed SDIO card at address 0001
> [    2.158567] mmc2: new high speed SDHC card at address 59b4
> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
> [    2.164206]  mmcblk2: p1 p2
> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
> 
> this is the output after adding patch 3
> 
> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
> [    1.873041] mmc0: new DDR MMC card at address 0001
> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
> [    2.124874] mmc2: Skipping voltage switch
> [    2.153475] mmc1: new high speed SDIO card at address 0001
> [    2.158610] mmc2: new high speed SDHC card at address 59b4
> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
> [    2.163910]  mmcblk2: p1 p2
> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
> 
> and this is the output after adding patches 4 & 5
> 
> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
> [    1.868910] mmc0: new DDR MMC card at address 0001
> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
> [    2.120693] mmc2: Skipping voltage switch
> [    2.148795] mmc1: new high speed SDIO card at address 0001
> [    2.154443] mmc2: new high speed SDHC card at address 59b4
> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
> [    2.159402]  mmcblk2: p1 p2
> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
> 
> regards
> Helmut
> 

Thanks a lot for the additional information. The first version of the patch
set broke byte mode obviously (block mode is working fine).

Before submitting a new version of the patch set:
Could you please apply patches 1, 2, and 4 of the patch set plus the
following one and re-test?

Thanks, Heiner

---
 drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
 1 file changed, 124 insertions(+), 98 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 6bfd3da9..ca685902 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -121,6 +121,13 @@
 #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
 #define MUX_CLK_NUM_PARENTS 2
 
+struct sd_emmc_desc {
+	u32 cmd_cfg;
+	u32 cmd_arg;
+	u32 cmd_data;
+	u32 cmd_resp;
+};
+
 struct meson_host {
 	struct	device		*dev;
 	struct	mmc_host	*mmc;
@@ -136,19 +143,12 @@ struct meson_host {
 	struct clk_divider cfg_div;
 	struct clk *cfg_div_clk;
 
-	unsigned int bounce_buf_size;
-	void *bounce_buf;
-	dma_addr_t bounce_dma_addr;
+	struct sd_emmc_desc *descs;
+	dma_addr_t descs_dma_addr;
 
 	bool vqmmc_enabled;
 };
 
-struct sd_emmc_desc {
-	u32 cmd_cfg;
-	u32 cmd_arg;
-	u32 cmd_data;
-	u32 cmd_resp;
-};
 #define CMD_CFG_LENGTH_SHIFT 0
 #define CMD_CFG_LENGTH_MASK 0x1ff
 #define CMD_CFG_BLOCK_MODE BIT(9)
@@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
 		return NULL;
 }
 
+static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
+{
+	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+}
+
+static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct mmc_data *data = mrq->data;
+
+	if (!data)
+		return;
+
+	data->host_cookie = true;
+
+	data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
+				    meson_mmc_get_data_dir(data));
+	if (!data->sg_count)
+		dev_err(mmc_dev(mmc), "dma_map_sg failed");
+}
+
+static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
+			       int err)
+{
+	struct mmc_data *data = mrq->data;
+
+	if (data && data->sg_count)
+		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
+			     meson_mmc_get_data_dir(data));
+}
+
 static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
 {
 	struct mmc_host *mmc = host->mmc;
@@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
-	struct sd_emmc_desc *desc, desc_tmp;
-	u32 cfg;
-	u8 blk_len, cmd_cfg_timeout;
-	unsigned int xfer_bytes = 0;
+	struct sd_emmc_desc *desc = host->descs;
+	struct mmc_data *data = cmd->data;
+	struct scatterlist *sg;
+	u32 cfg, cmd_cfg = 0;
+	u8 blk_len;
+	int i;
 
-	/* Setup descriptors */
 	dma_rmb();
-	desc = &desc_tmp;
-	memset(desc, 0, sizeof(struct sd_emmc_desc));
 
-	desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)	<<
-		CMD_CFG_CMD_INDEX_SHIFT;
-	desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
-	desc->cmd_arg = cmd->arg;
+	cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
+		   CMD_CFG_CMD_INDEX_SHIFT;
+	cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
 
 	/* Response */
 	if (cmd->flags & MMC_RSP_PRESENT) {
-		desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
 		if (cmd->flags & MMC_RSP_136)
-			desc->cmd_cfg |= CMD_CFG_RESP_128;
-		desc->cmd_cfg |= CMD_CFG_RESP_NUM;
-		desc->cmd_resp = 0;
+			cmd_cfg |= CMD_CFG_RESP_128;
+		cmd_cfg |= CMD_CFG_RESP_NUM;
 
 		if (!(cmd->flags & MMC_RSP_CRC))
-			desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
+			cmd_cfg |= CMD_CFG_RESP_NOCRC;
 
 		if (cmd->flags & MMC_RSP_BUSY)
-			desc->cmd_cfg |= CMD_CFG_R1B;
+			cmd_cfg |= CMD_CFG_R1B;
 	} else {
-		desc->cmd_cfg |= CMD_CFG_NO_RESP;
+		cmd_cfg |= CMD_CFG_NO_RESP;
 	}
 
-	/* data? */
-	if (cmd->data) {
-		desc->cmd_cfg |= CMD_CFG_DATA_IO;
-		if (cmd->data->blocks > 1) {
-			desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
-			desc->cmd_cfg |=
-				(cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
-				CMD_CFG_LENGTH_SHIFT;
+	if (data) {
+		cmd_cfg |= CMD_CFG_DATA_IO;
+
+		if (data->blocks > 1) {
+			cmd_cfg |= CMD_CFG_BLOCK_MODE;
 
 			/* check if block-size matches, if not update */
 			cfg = readl(host->regs + SD_EMMC_CFG);
 			blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
 			blk_len >>= CFG_BLK_LEN_SHIFT;
-			if (blk_len != ilog2(cmd->data->blksz)) {
-				dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
-					__func__, blk_len,
-					ilog2(cmd->data->blksz));
-				blk_len = ilog2(cmd->data->blksz);
+			if (blk_len != ilog2(data->blksz)) {
+				dev_dbg(host->dev,
+					"%s: update blk_len %d -> %d\n",
+					__func__, blk_len, ilog2(data->blksz));
+				blk_len = ilog2(data->blksz);
 				cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
 				cfg |= blk_len << CFG_BLK_LEN_SHIFT;
 				writel(cfg, host->regs + SD_EMMC_CFG);
 			}
-		} else {
-			desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
-			desc->cmd_cfg |=
-				(cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
-				CMD_CFG_LENGTH_SHIFT;
 		}
 
-		cmd->data->bytes_xfered = 0;
-		xfer_bytes = cmd->data->blksz * cmd->data->blocks;
-		if (cmd->data->flags & MMC_DATA_WRITE) {
-			desc->cmd_cfg |= CMD_CFG_DATA_WR;
-			WARN_ON(xfer_bytes > host->bounce_buf_size);
-			sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
-					  host->bounce_buf, xfer_bytes);
-			cmd->data->bytes_xfered = xfer_bytes;
-			dma_wmb();
-		} else {
-			desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
-		}
+		data->bytes_xfered = 0;
+		if (data->flags & MMC_DATA_WRITE)
+			cmd_cfg |= CMD_CFG_DATA_WR;
 
-		desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
+		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
+			   CMD_CFG_TIMEOUT_SHIFT;
+
+		for_each_sg(data->sg, sg, data->sg_count, i) {
+			unsigned int len = sg_dma_len(sg);
+
+			if (data->blocks > 1)
+				len /= data->blksz;
+
+			desc[i].cmd_cfg = cmd_cfg;
+			desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
+					   CMD_CFG_LENGTH_SHIFT;
+			if (i > 0)
+				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
+			desc[i].cmd_arg = cmd->arg;
+			desc[i].cmd_resp = 0;
+			desc[i].cmd_data = sg_dma_address(sg);
+		}
+		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
 
-		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
 	} else {
-		desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
-		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
+		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
+		cmd_cfg |= CMD_CFG_END_OF_CHAIN;
+		desc[0].cmd_cfg = cmd_cfg;
+		desc[0].cmd_arg = cmd->arg;
+		desc[0].cmd_resp = 0;
+		desc[0].cmd_data = 0;
 	}
-	desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
-		CMD_CFG_TIMEOUT_SHIFT;
 
 	host->cmd = cmd;
 
-	/* Last descriptor */
-	desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
-	writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
-	writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
-	writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
 	wmb(); /* ensure descriptor is written before kicked */
-	writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
+	cfg = host->descs_dma_addr | START_DESC_BUSY;
+	writel(cfg, host->regs + SD_EMMC_START);
 }
 
 static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct meson_host *host = mmc_priv(mmc);
+	bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
+
+	if (needs_pre_post_req)
+		meson_mmc_pre_req(mmc, mrq);
 
 	/* Stop execution */
 	writel(0, host->regs + SD_EMMC_START);
@@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 		meson_mmc_start_cmd(mmc, mrq->sbc);
 	else
 		meson_mmc_start_cmd(mmc, mrq->cmd);
+
+	if (needs_pre_post_req)
+		meson_mmc_post_req(mmc, mrq, 0);
 }
 
 static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
@@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 {
 	struct meson_host *host = dev_id;
 	struct mmc_command *cmd;
+	struct mmc_data *data;
 	u32 irq_en, status, raw_status;
 	irqreturn_t ret = IRQ_HANDLED;
 
@@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 	if (WARN_ON(!cmd))
 		return IRQ_NONE;
 
+	data = cmd->data;
+
 	spin_lock(&host->lock);
 	irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
 	raw_status = readl(host->regs + SD_EMMC_STATUS);
@@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 		dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
 		cmd->error = -ETIMEDOUT;
 	}
+
+	if (data && !cmd->error)
+		data->bytes_xfered = data->blksz * data->blocks;
+
 	if (status & IRQ_SDIO)
 		dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
 
-	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
-		ret = IRQ_WAKE_THREAD;
-	else  {
+	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
+		if (meson_mmc_get_next_command(cmd))
+			ret = IRQ_WAKE_THREAD;
+	} else  {
 		dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
 			 status, cmd->opcode, cmd->arg,
 			 cmd->flags, cmd->mrq->stop ? 1 : 0);
@@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
 {
 	struct meson_host *host = dev_id;
 	struct mmc_command *next_cmd, *cmd = host->cmd;
-	struct mmc_data *data;
-	unsigned int xfer_bytes;
 
 	if (WARN_ON(!cmd))
 		return IRQ_NONE;
 
-	data = cmd->data;
-	if (data && data->flags & MMC_DATA_READ) {
-		xfer_bytes = data->blksz * data->blocks;
-		WARN_ON(xfer_bytes > host->bounce_buf_size);
-		sg_copy_from_buffer(data->sg, data->sg_len,
-				    host->bounce_buf, xfer_bytes);
-		data->bytes_xfered = xfer_bytes;
-	}
-
 	next_cmd = meson_mmc_get_next_command(cmd);
-	if (next_cmd)
-		meson_mmc_start_cmd(host->mmc, next_cmd);
-	else
-		meson_mmc_request_done(host->mmc, cmd->mrq);
+	meson_mmc_start_cmd(host->mmc, next_cmd);
 
 	return IRQ_HANDLED;
 }
@@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
 	.request	= meson_mmc_request,
 	.set_ios	= meson_mmc_set_ios,
 	.get_cd         = meson_mmc_get_cd,
+	.pre_req	= meson_mmc_pre_req,
+	.post_req	= meson_mmc_post_req,
 };
 
 static int meson_mmc_probe(struct platform_device *pdev)
@@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
 
 	mmc->caps |= MMC_CAP_CMD23;
 	mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
-	mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
-
-	/* data bounce buffer */
-	host->bounce_buf_size = mmc->max_req_size;
-	host->bounce_buf =
-		dma_alloc_coherent(host->dev, host->bounce_buf_size,
-				   &host->bounce_dma_addr, GFP_KERNEL);
-	if (host->bounce_buf == NULL) {
-		dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
+	mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
+	mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
+	mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
+
+	host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
+					 &host->descs_dma_addr, GFP_KERNEL);
+	if (!host->descs) {
+		dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
 		ret = -ENOMEM;
 		goto err_div_clk;
 	}
@@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
 	/* disable interrupts */
 	writel(0, host->regs + SD_EMMC_IRQ_EN);
 
-	dma_free_coherent(host->dev, host->bounce_buf_size,
-			  host->bounce_buf, host->bounce_dma_addr);
+	dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
+			  host->descs_dma_addr);
 
 	clk_disable_unprepare(host->cfg_div_clk);
 	clk_disable_unprepare(host->core_clk);
-- 
2.12.0

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 17.03.2017 um 19:00 schrieb Helmut Klein:
> On 17.03.2017 07:44, Heiner Kallweit wrote:
>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>> Hallo Heiner,
>>>
>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>
>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>
>>> sd-card: from 6.5 to 22.5 MBytes/s
>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>
>>> But:
>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>
>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>
>> Thanks for testing and sharing the feedback. Much appreciated.
>> The board I test on supports block devices only.
>>
>> Could you please share few more details:
>> - Drivers involved
>> - All syslog messages related to the device / driver
>>
>> And please set the relevant mailing lists on cc when providing test feedback.
>> Others might find your feedback helpful too.
>>
>> Thanks, Heiner
>>
>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>
>>> regards
>>> Helmut
>>>
>>
>>
> 
> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
> 
> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
> 
> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
> 
> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
> 
> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
> 
> 
> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
> 
> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
> [    1.873010] mmc0: new DDR MMC card at address 0001
> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
> [    2.124761] mmc2: Skipping voltage switch
> [    2.153763] mmc1: new high speed SDIO card at address 0001
> [    2.158567] mmc2: new high speed SDHC card at address 59b4
> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
> [    2.164206]  mmcblk2: p1 p2
> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
> 
> this is the output after adding patch 3
> 
> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
> [    1.873041] mmc0: new DDR MMC card at address 0001
> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
> [    2.124874] mmc2: Skipping voltage switch
> [    2.153475] mmc1: new high speed SDIO card at address 0001
> [    2.158610] mmc2: new high speed SDHC card at address 59b4
> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
> [    2.163910]  mmcblk2: p1 p2
> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
> 
> and this is the output after adding patches 4 & 5
> 
> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
> [    1.868910] mmc0: new DDR MMC card at address 0001
> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
> [    2.120693] mmc2: Skipping voltage switch
> [    2.148795] mmc1: new high speed SDIO card at address 0001
> [    2.154443] mmc2: new high speed SDHC card at address 59b4
> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
> [    2.159402]  mmcblk2: p1 p2
> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
> 
> regards
> Helmut
> 

Thanks a lot for the additional information. The first version of the patch
set broke byte mode obviously (block mode is working fine).

Before submitting a new version of the patch set:
Could you please apply patches 1, 2, and 4 of the patch set plus the
following one and re-test?

Thanks, Heiner

---
 drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
 1 file changed, 124 insertions(+), 98 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 6bfd3da9..ca685902 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -121,6 +121,13 @@
 #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
 #define MUX_CLK_NUM_PARENTS 2
 
+struct sd_emmc_desc {
+	u32 cmd_cfg;
+	u32 cmd_arg;
+	u32 cmd_data;
+	u32 cmd_resp;
+};
+
 struct meson_host {
 	struct	device		*dev;
 	struct	mmc_host	*mmc;
@@ -136,19 +143,12 @@ struct meson_host {
 	struct clk_divider cfg_div;
 	struct clk *cfg_div_clk;
 
-	unsigned int bounce_buf_size;
-	void *bounce_buf;
-	dma_addr_t bounce_dma_addr;
+	struct sd_emmc_desc *descs;
+	dma_addr_t descs_dma_addr;
 
 	bool vqmmc_enabled;
 };
 
-struct sd_emmc_desc {
-	u32 cmd_cfg;
-	u32 cmd_arg;
-	u32 cmd_data;
-	u32 cmd_resp;
-};
 #define CMD_CFG_LENGTH_SHIFT 0
 #define CMD_CFG_LENGTH_MASK 0x1ff
 #define CMD_CFG_BLOCK_MODE BIT(9)
@@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
 		return NULL;
 }
 
+static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
+{
+	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+}
+
+static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct mmc_data *data = mrq->data;
+
+	if (!data)
+		return;
+
+	data->host_cookie = true;
+
+	data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
+				    meson_mmc_get_data_dir(data));
+	if (!data->sg_count)
+		dev_err(mmc_dev(mmc), "dma_map_sg failed");
+}
+
+static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
+			       int err)
+{
+	struct mmc_data *data = mrq->data;
+
+	if (data && data->sg_count)
+		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
+			     meson_mmc_get_data_dir(data));
+}
+
 static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
 {
 	struct mmc_host *mmc = host->mmc;
@@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
-	struct sd_emmc_desc *desc, desc_tmp;
-	u32 cfg;
-	u8 blk_len, cmd_cfg_timeout;
-	unsigned int xfer_bytes = 0;
+	struct sd_emmc_desc *desc = host->descs;
+	struct mmc_data *data = cmd->data;
+	struct scatterlist *sg;
+	u32 cfg, cmd_cfg = 0;
+	u8 blk_len;
+	int i;
 
-	/* Setup descriptors */
 	dma_rmb();
-	desc = &desc_tmp;
-	memset(desc, 0, sizeof(struct sd_emmc_desc));
 
-	desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)	<<
-		CMD_CFG_CMD_INDEX_SHIFT;
-	desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
-	desc->cmd_arg = cmd->arg;
+	cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
+		   CMD_CFG_CMD_INDEX_SHIFT;
+	cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
 
 	/* Response */
 	if (cmd->flags & MMC_RSP_PRESENT) {
-		desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
 		if (cmd->flags & MMC_RSP_136)
-			desc->cmd_cfg |= CMD_CFG_RESP_128;
-		desc->cmd_cfg |= CMD_CFG_RESP_NUM;
-		desc->cmd_resp = 0;
+			cmd_cfg |= CMD_CFG_RESP_128;
+		cmd_cfg |= CMD_CFG_RESP_NUM;
 
 		if (!(cmd->flags & MMC_RSP_CRC))
-			desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
+			cmd_cfg |= CMD_CFG_RESP_NOCRC;
 
 		if (cmd->flags & MMC_RSP_BUSY)
-			desc->cmd_cfg |= CMD_CFG_R1B;
+			cmd_cfg |= CMD_CFG_R1B;
 	} else {
-		desc->cmd_cfg |= CMD_CFG_NO_RESP;
+		cmd_cfg |= CMD_CFG_NO_RESP;
 	}
 
-	/* data? */
-	if (cmd->data) {
-		desc->cmd_cfg |= CMD_CFG_DATA_IO;
-		if (cmd->data->blocks > 1) {
-			desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
-			desc->cmd_cfg |=
-				(cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
-				CMD_CFG_LENGTH_SHIFT;
+	if (data) {
+		cmd_cfg |= CMD_CFG_DATA_IO;
+
+		if (data->blocks > 1) {
+			cmd_cfg |= CMD_CFG_BLOCK_MODE;
 
 			/* check if block-size matches, if not update */
 			cfg = readl(host->regs + SD_EMMC_CFG);
 			blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
 			blk_len >>= CFG_BLK_LEN_SHIFT;
-			if (blk_len != ilog2(cmd->data->blksz)) {
-				dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
-					__func__, blk_len,
-					ilog2(cmd->data->blksz));
-				blk_len = ilog2(cmd->data->blksz);
+			if (blk_len != ilog2(data->blksz)) {
+				dev_dbg(host->dev,
+					"%s: update blk_len %d -> %d\n",
+					__func__, blk_len, ilog2(data->blksz));
+				blk_len = ilog2(data->blksz);
 				cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
 				cfg |= blk_len << CFG_BLK_LEN_SHIFT;
 				writel(cfg, host->regs + SD_EMMC_CFG);
 			}
-		} else {
-			desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
-			desc->cmd_cfg |=
-				(cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
-				CMD_CFG_LENGTH_SHIFT;
 		}
 
-		cmd->data->bytes_xfered = 0;
-		xfer_bytes = cmd->data->blksz * cmd->data->blocks;
-		if (cmd->data->flags & MMC_DATA_WRITE) {
-			desc->cmd_cfg |= CMD_CFG_DATA_WR;
-			WARN_ON(xfer_bytes > host->bounce_buf_size);
-			sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
-					  host->bounce_buf, xfer_bytes);
-			cmd->data->bytes_xfered = xfer_bytes;
-			dma_wmb();
-		} else {
-			desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
-		}
+		data->bytes_xfered = 0;
+		if (data->flags & MMC_DATA_WRITE)
+			cmd_cfg |= CMD_CFG_DATA_WR;
 
-		desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
+		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
+			   CMD_CFG_TIMEOUT_SHIFT;
+
+		for_each_sg(data->sg, sg, data->sg_count, i) {
+			unsigned int len = sg_dma_len(sg);
+
+			if (data->blocks > 1)
+				len /= data->blksz;
+
+			desc[i].cmd_cfg = cmd_cfg;
+			desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
+					   CMD_CFG_LENGTH_SHIFT;
+			if (i > 0)
+				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
+			desc[i].cmd_arg = cmd->arg;
+			desc[i].cmd_resp = 0;
+			desc[i].cmd_data = sg_dma_address(sg);
+		}
+		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
 
-		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
 	} else {
-		desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
-		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
+		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
+		cmd_cfg |= CMD_CFG_END_OF_CHAIN;
+		desc[0].cmd_cfg = cmd_cfg;
+		desc[0].cmd_arg = cmd->arg;
+		desc[0].cmd_resp = 0;
+		desc[0].cmd_data = 0;
 	}
-	desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
-		CMD_CFG_TIMEOUT_SHIFT;
 
 	host->cmd = cmd;
 
-	/* Last descriptor */
-	desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
-	writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
-	writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
-	writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
 	wmb(); /* ensure descriptor is written before kicked */
-	writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
+	cfg = host->descs_dma_addr | START_DESC_BUSY;
+	writel(cfg, host->regs + SD_EMMC_START);
 }
 
 static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct meson_host *host = mmc_priv(mmc);
+	bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
+
+	if (needs_pre_post_req)
+		meson_mmc_pre_req(mmc, mrq);
 
 	/* Stop execution */
 	writel(0, host->regs + SD_EMMC_START);
@@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 		meson_mmc_start_cmd(mmc, mrq->sbc);
 	else
 		meson_mmc_start_cmd(mmc, mrq->cmd);
+
+	if (needs_pre_post_req)
+		meson_mmc_post_req(mmc, mrq, 0);
 }
 
 static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
@@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 {
 	struct meson_host *host = dev_id;
 	struct mmc_command *cmd;
+	struct mmc_data *data;
 	u32 irq_en, status, raw_status;
 	irqreturn_t ret = IRQ_HANDLED;
 
@@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 	if (WARN_ON(!cmd))
 		return IRQ_NONE;
 
+	data = cmd->data;
+
 	spin_lock(&host->lock);
 	irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
 	raw_status = readl(host->regs + SD_EMMC_STATUS);
@@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 		dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
 		cmd->error = -ETIMEDOUT;
 	}
+
+	if (data && !cmd->error)
+		data->bytes_xfered = data->blksz * data->blocks;
+
 	if (status & IRQ_SDIO)
 		dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
 
-	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
-		ret = IRQ_WAKE_THREAD;
-	else  {
+	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
+		if (meson_mmc_get_next_command(cmd))
+			ret = IRQ_WAKE_THREAD;
+	} else  {
 		dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
 			 status, cmd->opcode, cmd->arg,
 			 cmd->flags, cmd->mrq->stop ? 1 : 0);
@@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
 {
 	struct meson_host *host = dev_id;
 	struct mmc_command *next_cmd, *cmd = host->cmd;
-	struct mmc_data *data;
-	unsigned int xfer_bytes;
 
 	if (WARN_ON(!cmd))
 		return IRQ_NONE;
 
-	data = cmd->data;
-	if (data && data->flags & MMC_DATA_READ) {
-		xfer_bytes = data->blksz * data->blocks;
-		WARN_ON(xfer_bytes > host->bounce_buf_size);
-		sg_copy_from_buffer(data->sg, data->sg_len,
-				    host->bounce_buf, xfer_bytes);
-		data->bytes_xfered = xfer_bytes;
-	}
-
 	next_cmd = meson_mmc_get_next_command(cmd);
-	if (next_cmd)
-		meson_mmc_start_cmd(host->mmc, next_cmd);
-	else
-		meson_mmc_request_done(host->mmc, cmd->mrq);
+	meson_mmc_start_cmd(host->mmc, next_cmd);
 
 	return IRQ_HANDLED;
 }
@@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
 	.request	= meson_mmc_request,
 	.set_ios	= meson_mmc_set_ios,
 	.get_cd         = meson_mmc_get_cd,
+	.pre_req	= meson_mmc_pre_req,
+	.post_req	= meson_mmc_post_req,
 };
 
 static int meson_mmc_probe(struct platform_device *pdev)
@@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
 
 	mmc->caps |= MMC_CAP_CMD23;
 	mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
-	mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
-
-	/* data bounce buffer */
-	host->bounce_buf_size = mmc->max_req_size;
-	host->bounce_buf =
-		dma_alloc_coherent(host->dev, host->bounce_buf_size,
-				   &host->bounce_dma_addr, GFP_KERNEL);
-	if (host->bounce_buf == NULL) {
-		dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
+	mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
+	mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
+	mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
+
+	host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
+					 &host->descs_dma_addr, GFP_KERNEL);
+	if (!host->descs) {
+		dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
 		ret = -ENOMEM;
 		goto err_div_clk;
 	}
@@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
 	/* disable interrupts */
 	writel(0, host->regs + SD_EMMC_IRQ_EN);
 
-	dma_free_coherent(host->dev, host->bounce_buf_size,
-			  host->bounce_buf, host->bounce_dma_addr);
+	dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
+			  host->descs_dma_addr);
 
 	clk_disable_unprepare(host->cfg_div_clk);
 	clk_disable_unprepare(host->core_clk);
-- 
2.12.0

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 17.03.2017 20:54, Heiner Kallweit wrote:
> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>> Hallo Heiner,
>>>>
>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>
>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>
>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>
>>>> But:
>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>
>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>
>>> Thanks for testing and sharing the feedback. Much appreciated.
>>> The board I test on supports block devices only.
>>>
>>> Could you please share few more details:
>>> - Drivers involved
>>> - All syslog messages related to the device / driver
>>>
>>> And please set the relevant mailing lists on cc when providing test feedback.
>>> Others might find your feedback helpful too.
>>>
>>> Thanks, Heiner
>>>
>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>
>>>> regards
>>>> Helmut
>>>>
>>>
>>>
>>
>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>
>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>
>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>
>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>
>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>
>>
>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>
>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>> [    1.873010] mmc0: new DDR MMC card at address 0001
>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>> [    2.124761] mmc2: Skipping voltage switch
>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>> [    2.164206]  mmcblk2: p1 p2
>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>
>> this is the output after adding patch 3
>>
>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>> [    1.873041] mmc0: new DDR MMC card at address 0001
>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>> [    2.124874] mmc2: Skipping voltage switch
>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>> [    2.163910]  mmcblk2: p1 p2
>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>
>> and this is the output after adding patches 4 & 5
>>
>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>> [    1.868910] mmc0: new DDR MMC card at address 0001
>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>> [    2.120693] mmc2: Skipping voltage switch
>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>> [    2.159402]  mmcblk2: p1 p2
>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>
>> regards
>> Helmut
>>
>
> Thanks a lot for the additional information. The first version of the patch
> set broke byte mode obviously (block mode is working fine).
>
> Before submitting a new version of the patch set:
> Could you please apply patches 1, 2, and 4 of the patch set plus the
> following one and re-test?
>
> Thanks, Heiner
>
> ---
>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>  1 file changed, 124 insertions(+), 98 deletions(-)
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index 6bfd3da9..ca685902 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -121,6 +121,13 @@
>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>  #define MUX_CLK_NUM_PARENTS 2
>
> +struct sd_emmc_desc {
> +	u32 cmd_cfg;
> +	u32 cmd_arg;
> +	u32 cmd_data;
> +	u32 cmd_resp;
> +};
> +
>  struct meson_host {
>  	struct	device		*dev;
>  	struct	mmc_host	*mmc;
> @@ -136,19 +143,12 @@ struct meson_host {
>  	struct clk_divider cfg_div;
>  	struct clk *cfg_div_clk;
>
> -	unsigned int bounce_buf_size;
> -	void *bounce_buf;
> -	dma_addr_t bounce_dma_addr;
> +	struct sd_emmc_desc *descs;
> +	dma_addr_t descs_dma_addr;
>
>  	bool vqmmc_enabled;
>  };
>
> -struct sd_emmc_desc {
> -	u32 cmd_cfg;
> -	u32 cmd_arg;
> -	u32 cmd_data;
> -	u32 cmd_resp;
> -};
>  #define CMD_CFG_LENGTH_SHIFT 0
>  #define CMD_CFG_LENGTH_MASK 0x1ff
>  #define CMD_CFG_BLOCK_MODE BIT(9)
> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>  		return NULL;
>  }
>
> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
> +{
> +	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
> +}
> +
> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
> +{
> +	struct mmc_data *data = mrq->data;
> +
> +	if (!data)
> +		return;
> +
> +	data->host_cookie = true;
> +
> +	data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
> +				    meson_mmc_get_data_dir(data));
> +	if (!data->sg_count)
> +		dev_err(mmc_dev(mmc), "dma_map_sg failed");
> +}
> +
> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
> +			       int err)
> +{
> +	struct mmc_data *data = mrq->data;
> +
> +	if (data && data->sg_count)
> +		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
> +			     meson_mmc_get_data_dir(data));
> +}
> +
>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>  {
>  	struct mmc_host *mmc = host->mmc;
> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  {
>  	struct meson_host *host = mmc_priv(mmc);
> -	struct sd_emmc_desc *desc, desc_tmp;
> -	u32 cfg;
> -	u8 blk_len, cmd_cfg_timeout;
> -	unsigned int xfer_bytes = 0;
> +	struct sd_emmc_desc *desc = host->descs;
> +	struct mmc_data *data = cmd->data;
> +	struct scatterlist *sg;
> +	u32 cfg, cmd_cfg = 0;
> +	u8 blk_len;
> +	int i;
>
> -	/* Setup descriptors */
>  	dma_rmb();
> -	desc = &desc_tmp;
> -	memset(desc, 0, sizeof(struct sd_emmc_desc));
>
> -	desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)	<<
> -		CMD_CFG_CMD_INDEX_SHIFT;
> -	desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
> -	desc->cmd_arg = cmd->arg;
> +	cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
> +		   CMD_CFG_CMD_INDEX_SHIFT;
> +	cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>
>  	/* Response */
>  	if (cmd->flags & MMC_RSP_PRESENT) {
> -		desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>  		if (cmd->flags & MMC_RSP_136)
> -			desc->cmd_cfg |= CMD_CFG_RESP_128;
> -		desc->cmd_cfg |= CMD_CFG_RESP_NUM;
> -		desc->cmd_resp = 0;
> +			cmd_cfg |= CMD_CFG_RESP_128;
> +		cmd_cfg |= CMD_CFG_RESP_NUM;
>
>  		if (!(cmd->flags & MMC_RSP_CRC))
> -			desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
> +			cmd_cfg |= CMD_CFG_RESP_NOCRC;
>
>  		if (cmd->flags & MMC_RSP_BUSY)
> -			desc->cmd_cfg |= CMD_CFG_R1B;
> +			cmd_cfg |= CMD_CFG_R1B;
>  	} else {
> -		desc->cmd_cfg |= CMD_CFG_NO_RESP;
> +		cmd_cfg |= CMD_CFG_NO_RESP;
>  	}
>
> -	/* data? */
> -	if (cmd->data) {
> -		desc->cmd_cfg |= CMD_CFG_DATA_IO;
> -		if (cmd->data->blocks > 1) {
> -			desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
> -			desc->cmd_cfg |=
> -				(cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
> -				CMD_CFG_LENGTH_SHIFT;
> +	if (data) {
> +		cmd_cfg |= CMD_CFG_DATA_IO;
> +
> +		if (data->blocks > 1) {
> +			cmd_cfg |= CMD_CFG_BLOCK_MODE;
>
>  			/* check if block-size matches, if not update */
>  			cfg = readl(host->regs + SD_EMMC_CFG);
>  			blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>  			blk_len >>= CFG_BLK_LEN_SHIFT;
> -			if (blk_len != ilog2(cmd->data->blksz)) {
> -				dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
> -					__func__, blk_len,
> -					ilog2(cmd->data->blksz));
> -				blk_len = ilog2(cmd->data->blksz);
> +			if (blk_len != ilog2(data->blksz)) {
> +				dev_dbg(host->dev,
> +					"%s: update blk_len %d -> %d\n",
> +					__func__, blk_len, ilog2(data->blksz));
> +				blk_len = ilog2(data->blksz);
>  				cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>  				cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>  				writel(cfg, host->regs + SD_EMMC_CFG);
>  			}
> -		} else {
> -			desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
> -			desc->cmd_cfg |=
> -				(cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
> -				CMD_CFG_LENGTH_SHIFT;
>  		}
>
> -		cmd->data->bytes_xfered = 0;
> -		xfer_bytes = cmd->data->blksz * cmd->data->blocks;
> -		if (cmd->data->flags & MMC_DATA_WRITE) {
> -			desc->cmd_cfg |= CMD_CFG_DATA_WR;
> -			WARN_ON(xfer_bytes > host->bounce_buf_size);
> -			sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
> -					  host->bounce_buf, xfer_bytes);
> -			cmd->data->bytes_xfered = xfer_bytes;
> -			dma_wmb();
> -		} else {
> -			desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
> -		}
> +		data->bytes_xfered = 0;
> +		if (data->flags & MMC_DATA_WRITE)
> +			cmd_cfg |= CMD_CFG_DATA_WR;
>
> -		desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
> +		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
> +			   CMD_CFG_TIMEOUT_SHIFT;
> +
> +		for_each_sg(data->sg, sg, data->sg_count, i) {
> +			unsigned int len = sg_dma_len(sg);
> +
> +			if (data->blocks > 1)
> +				len /= data->blksz;
> +
> +			desc[i].cmd_cfg = cmd_cfg;
> +			desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
> +					   CMD_CFG_LENGTH_SHIFT;
> +			if (i > 0)
> +				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
> +			desc[i].cmd_arg = cmd->arg;
> +			desc[i].cmd_resp = 0;
> +			desc[i].cmd_data = sg_dma_address(sg);
> +		}
> +		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>
> -		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>  	} else {
> -		desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
> -		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
> +		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
> +		cmd_cfg |= CMD_CFG_END_OF_CHAIN;
> +		desc[0].cmd_cfg = cmd_cfg;
> +		desc[0].cmd_arg = cmd->arg;
> +		desc[0].cmd_resp = 0;
> +		desc[0].cmd_data = 0;
>  	}
> -	desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
> -		CMD_CFG_TIMEOUT_SHIFT;
>
>  	host->cmd = cmd;
>
> -	/* Last descriptor */
> -	desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
> -	writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
> -	writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
> -	writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>  	wmb(); /* ensure descriptor is written before kicked */
> -	writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
> +	cfg = host->descs_dma_addr | START_DESC_BUSY;
> +	writel(cfg, host->regs + SD_EMMC_START);
>  }
>
>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>  {
>  	struct meson_host *host = mmc_priv(mmc);
> +	bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
> +
> +	if (needs_pre_post_req)
> +		meson_mmc_pre_req(mmc, mrq);
>
>  	/* Stop execution */
>  	writel(0, host->regs + SD_EMMC_START);
> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>  		meson_mmc_start_cmd(mmc, mrq->sbc);
>  	else
>  		meson_mmc_start_cmd(mmc, mrq->cmd);
> +
> +	if (needs_pre_post_req)
> +		meson_mmc_post_req(mmc, mrq, 0);
>  }
>
>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>  {
>  	struct meson_host *host = dev_id;
>  	struct mmc_command *cmd;
> +	struct mmc_data *data;
>  	u32 irq_en, status, raw_status;
>  	irqreturn_t ret = IRQ_HANDLED;
>
> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>  	if (WARN_ON(!cmd))
>  		return IRQ_NONE;
>
> +	data = cmd->data;
> +
>  	spin_lock(&host->lock);
>  	irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>  	raw_status = readl(host->regs + SD_EMMC_STATUS);
> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>  		dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>  		cmd->error = -ETIMEDOUT;
>  	}
> +
> +	if (data && !cmd->error)
> +		data->bytes_xfered = data->blksz * data->blocks;
> +
>  	if (status & IRQ_SDIO)
>  		dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>
> -	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
> -		ret = IRQ_WAKE_THREAD;
> -	else  {
> +	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
> +		if (meson_mmc_get_next_command(cmd))
> +			ret = IRQ_WAKE_THREAD;
> +	} else  {
>  		dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>  			 status, cmd->opcode, cmd->arg,
>  			 cmd->flags, cmd->mrq->stop ? 1 : 0);
> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>  {
>  	struct meson_host *host = dev_id;
>  	struct mmc_command *next_cmd, *cmd = host->cmd;
> -	struct mmc_data *data;
> -	unsigned int xfer_bytes;
>
>  	if (WARN_ON(!cmd))
>  		return IRQ_NONE;
>
> -	data = cmd->data;
> -	if (data && data->flags & MMC_DATA_READ) {
> -		xfer_bytes = data->blksz * data->blocks;
> -		WARN_ON(xfer_bytes > host->bounce_buf_size);
> -		sg_copy_from_buffer(data->sg, data->sg_len,
> -				    host->bounce_buf, xfer_bytes);
> -		data->bytes_xfered = xfer_bytes;
> -	}
> -
>  	next_cmd = meson_mmc_get_next_command(cmd);
> -	if (next_cmd)
> -		meson_mmc_start_cmd(host->mmc, next_cmd);
> -	else
> -		meson_mmc_request_done(host->mmc, cmd->mrq);
> +	meson_mmc_start_cmd(host->mmc, next_cmd);
>
>  	return IRQ_HANDLED;
>  }
> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>  	.request	= meson_mmc_request,
>  	.set_ios	= meson_mmc_set_ios,
>  	.get_cd         = meson_mmc_get_cd,
> +	.pre_req	= meson_mmc_pre_req,
> +	.post_req	= meson_mmc_post_req,
>  };
>
>  static int meson_mmc_probe(struct platform_device *pdev)
> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>
>  	mmc->caps |= MMC_CAP_CMD23;
>  	mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
> -	mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
> -
> -	/* data bounce buffer */
> -	host->bounce_buf_size = mmc->max_req_size;
> -	host->bounce_buf =
> -		dma_alloc_coherent(host->dev, host->bounce_buf_size,
> -				   &host->bounce_dma_addr, GFP_KERNEL);
> -	if (host->bounce_buf == NULL) {
> -		dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
> +	mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
> +	mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
> +	mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
> +
> +	host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
> +					 &host->descs_dma_addr, GFP_KERNEL);
> +	if (!host->descs) {
> +		dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>  		ret = -ENOMEM;
>  		goto err_div_clk;
>  	}
> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>  	/* disable interrupts */
>  	writel(0, host->regs + SD_EMMC_IRQ_EN);
>
> -	dma_free_coherent(host->dev, host->bounce_buf_size,
> -			  host->bounce_buf, host->bounce_dma_addr);
> +	dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
> +			  host->descs_dma_addr);
>
>  	clk_disable_unprepare(host->cfg_div_clk);
>  	clk_disable_unprepare(host->core_clk);
>

compared to the patches 1...5 there is absolutely no change to patches 
1, 2, 4 and the above. Neither syslog nor performance.

regards
Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 17.03.2017 20:54, Heiner Kallweit wrote:
> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>> Hallo Heiner,
>>>>
>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>
>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>
>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>
>>>> But:
>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>
>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>
>>> Thanks for testing and sharing the feedback. Much appreciated.
>>> The board I test on supports block devices only.
>>>
>>> Could you please share few more details:
>>> - Drivers involved
>>> - All syslog messages related to the device / driver
>>>
>>> And please set the relevant mailing lists on cc when providing test feedback.
>>> Others might find your feedback helpful too.
>>>
>>> Thanks, Heiner
>>>
>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>
>>>> regards
>>>> Helmut
>>>>
>>>
>>>
>>
>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>
>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>
>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>
>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>
>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>
>>
>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>
>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>> [    1.873010] mmc0: new DDR MMC card at address 0001
>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>> [    2.124761] mmc2: Skipping voltage switch
>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>> [    2.164206]  mmcblk2: p1 p2
>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>
>> this is the output after adding patch 3
>>
>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>> [    1.873041] mmc0: new DDR MMC card at address 0001
>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>> [    2.124874] mmc2: Skipping voltage switch
>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>> [    2.163910]  mmcblk2: p1 p2
>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>
>> and this is the output after adding patches 4 & 5
>>
>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>> [    1.868910] mmc0: new DDR MMC card at address 0001
>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>> [    2.120693] mmc2: Skipping voltage switch
>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>> [    2.159402]  mmcblk2: p1 p2
>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>
>> regards
>> Helmut
>>
>
> Thanks a lot for the additional information. The first version of the patch
> set broke byte mode obviously (block mode is working fine).
>
> Before submitting a new version of the patch set:
> Could you please apply patches 1, 2, and 4 of the patch set plus the
> following one and re-test?
>
> Thanks, Heiner
>
> ---
>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>  1 file changed, 124 insertions(+), 98 deletions(-)
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index 6bfd3da9..ca685902 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -121,6 +121,13 @@
>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>  #define MUX_CLK_NUM_PARENTS 2
>
> +struct sd_emmc_desc {
> +	u32 cmd_cfg;
> +	u32 cmd_arg;
> +	u32 cmd_data;
> +	u32 cmd_resp;
> +};
> +
>  struct meson_host {
>  	struct	device		*dev;
>  	struct	mmc_host	*mmc;
> @@ -136,19 +143,12 @@ struct meson_host {
>  	struct clk_divider cfg_div;
>  	struct clk *cfg_div_clk;
>
> -	unsigned int bounce_buf_size;
> -	void *bounce_buf;
> -	dma_addr_t bounce_dma_addr;
> +	struct sd_emmc_desc *descs;
> +	dma_addr_t descs_dma_addr;
>
>  	bool vqmmc_enabled;
>  };
>
> -struct sd_emmc_desc {
> -	u32 cmd_cfg;
> -	u32 cmd_arg;
> -	u32 cmd_data;
> -	u32 cmd_resp;
> -};
>  #define CMD_CFG_LENGTH_SHIFT 0
>  #define CMD_CFG_LENGTH_MASK 0x1ff
>  #define CMD_CFG_BLOCK_MODE BIT(9)
> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>  		return NULL;
>  }
>
> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
> +{
> +	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
> +}
> +
> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
> +{
> +	struct mmc_data *data = mrq->data;
> +
> +	if (!data)
> +		return;
> +
> +	data->host_cookie = true;
> +
> +	data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
> +				    meson_mmc_get_data_dir(data));
> +	if (!data->sg_count)
> +		dev_err(mmc_dev(mmc), "dma_map_sg failed");
> +}
> +
> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
> +			       int err)
> +{
> +	struct mmc_data *data = mrq->data;
> +
> +	if (data && data->sg_count)
> +		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
> +			     meson_mmc_get_data_dir(data));
> +}
> +
>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>  {
>  	struct mmc_host *mmc = host->mmc;
> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  {
>  	struct meson_host *host = mmc_priv(mmc);
> -	struct sd_emmc_desc *desc, desc_tmp;
> -	u32 cfg;
> -	u8 blk_len, cmd_cfg_timeout;
> -	unsigned int xfer_bytes = 0;
> +	struct sd_emmc_desc *desc = host->descs;
> +	struct mmc_data *data = cmd->data;
> +	struct scatterlist *sg;
> +	u32 cfg, cmd_cfg = 0;
> +	u8 blk_len;
> +	int i;
>
> -	/* Setup descriptors */
>  	dma_rmb();
> -	desc = &desc_tmp;
> -	memset(desc, 0, sizeof(struct sd_emmc_desc));
>
> -	desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)	<<
> -		CMD_CFG_CMD_INDEX_SHIFT;
> -	desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
> -	desc->cmd_arg = cmd->arg;
> +	cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
> +		   CMD_CFG_CMD_INDEX_SHIFT;
> +	cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>
>  	/* Response */
>  	if (cmd->flags & MMC_RSP_PRESENT) {
> -		desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>  		if (cmd->flags & MMC_RSP_136)
> -			desc->cmd_cfg |= CMD_CFG_RESP_128;
> -		desc->cmd_cfg |= CMD_CFG_RESP_NUM;
> -		desc->cmd_resp = 0;
> +			cmd_cfg |= CMD_CFG_RESP_128;
> +		cmd_cfg |= CMD_CFG_RESP_NUM;
>
>  		if (!(cmd->flags & MMC_RSP_CRC))
> -			desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
> +			cmd_cfg |= CMD_CFG_RESP_NOCRC;
>
>  		if (cmd->flags & MMC_RSP_BUSY)
> -			desc->cmd_cfg |= CMD_CFG_R1B;
> +			cmd_cfg |= CMD_CFG_R1B;
>  	} else {
> -		desc->cmd_cfg |= CMD_CFG_NO_RESP;
> +		cmd_cfg |= CMD_CFG_NO_RESP;
>  	}
>
> -	/* data? */
> -	if (cmd->data) {
> -		desc->cmd_cfg |= CMD_CFG_DATA_IO;
> -		if (cmd->data->blocks > 1) {
> -			desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
> -			desc->cmd_cfg |=
> -				(cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
> -				CMD_CFG_LENGTH_SHIFT;
> +	if (data) {
> +		cmd_cfg |= CMD_CFG_DATA_IO;
> +
> +		if (data->blocks > 1) {
> +			cmd_cfg |= CMD_CFG_BLOCK_MODE;
>
>  			/* check if block-size matches, if not update */
>  			cfg = readl(host->regs + SD_EMMC_CFG);
>  			blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>  			blk_len >>= CFG_BLK_LEN_SHIFT;
> -			if (blk_len != ilog2(cmd->data->blksz)) {
> -				dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
> -					__func__, blk_len,
> -					ilog2(cmd->data->blksz));
> -				blk_len = ilog2(cmd->data->blksz);
> +			if (blk_len != ilog2(data->blksz)) {
> +				dev_dbg(host->dev,
> +					"%s: update blk_len %d -> %d\n",
> +					__func__, blk_len, ilog2(data->blksz));
> +				blk_len = ilog2(data->blksz);
>  				cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>  				cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>  				writel(cfg, host->regs + SD_EMMC_CFG);
>  			}
> -		} else {
> -			desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
> -			desc->cmd_cfg |=
> -				(cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
> -				CMD_CFG_LENGTH_SHIFT;
>  		}
>
> -		cmd->data->bytes_xfered = 0;
> -		xfer_bytes = cmd->data->blksz * cmd->data->blocks;
> -		if (cmd->data->flags & MMC_DATA_WRITE) {
> -			desc->cmd_cfg |= CMD_CFG_DATA_WR;
> -			WARN_ON(xfer_bytes > host->bounce_buf_size);
> -			sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
> -					  host->bounce_buf, xfer_bytes);
> -			cmd->data->bytes_xfered = xfer_bytes;
> -			dma_wmb();
> -		} else {
> -			desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
> -		}
> +		data->bytes_xfered = 0;
> +		if (data->flags & MMC_DATA_WRITE)
> +			cmd_cfg |= CMD_CFG_DATA_WR;
>
> -		desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
> +		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
> +			   CMD_CFG_TIMEOUT_SHIFT;
> +
> +		for_each_sg(data->sg, sg, data->sg_count, i) {
> +			unsigned int len = sg_dma_len(sg);
> +
> +			if (data->blocks > 1)
> +				len /= data->blksz;
> +
> +			desc[i].cmd_cfg = cmd_cfg;
> +			desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
> +					   CMD_CFG_LENGTH_SHIFT;
> +			if (i > 0)
> +				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
> +			desc[i].cmd_arg = cmd->arg;
> +			desc[i].cmd_resp = 0;
> +			desc[i].cmd_data = sg_dma_address(sg);
> +		}
> +		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>
> -		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>  	} else {
> -		desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
> -		cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
> +		cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
> +		cmd_cfg |= CMD_CFG_END_OF_CHAIN;
> +		desc[0].cmd_cfg = cmd_cfg;
> +		desc[0].cmd_arg = cmd->arg;
> +		desc[0].cmd_resp = 0;
> +		desc[0].cmd_data = 0;
>  	}
> -	desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
> -		CMD_CFG_TIMEOUT_SHIFT;
>
>  	host->cmd = cmd;
>
> -	/* Last descriptor */
> -	desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
> -	writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
> -	writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
> -	writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>  	wmb(); /* ensure descriptor is written before kicked */
> -	writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
> +	cfg = host->descs_dma_addr | START_DESC_BUSY;
> +	writel(cfg, host->regs + SD_EMMC_START);
>  }
>
>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>  {
>  	struct meson_host *host = mmc_priv(mmc);
> +	bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
> +
> +	if (needs_pre_post_req)
> +		meson_mmc_pre_req(mmc, mrq);
>
>  	/* Stop execution */
>  	writel(0, host->regs + SD_EMMC_START);
> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>  		meson_mmc_start_cmd(mmc, mrq->sbc);
>  	else
>  		meson_mmc_start_cmd(mmc, mrq->cmd);
> +
> +	if (needs_pre_post_req)
> +		meson_mmc_post_req(mmc, mrq, 0);
>  }
>
>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>  {
>  	struct meson_host *host = dev_id;
>  	struct mmc_command *cmd;
> +	struct mmc_data *data;
>  	u32 irq_en, status, raw_status;
>  	irqreturn_t ret = IRQ_HANDLED;
>
> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>  	if (WARN_ON(!cmd))
>  		return IRQ_NONE;
>
> +	data = cmd->data;
> +
>  	spin_lock(&host->lock);
>  	irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>  	raw_status = readl(host->regs + SD_EMMC_STATUS);
> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>  		dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>  		cmd->error = -ETIMEDOUT;
>  	}
> +
> +	if (data && !cmd->error)
> +		data->bytes_xfered = data->blksz * data->blocks;
> +
>  	if (status & IRQ_SDIO)
>  		dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>
> -	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
> -		ret = IRQ_WAKE_THREAD;
> -	else  {
> +	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
> +		if (meson_mmc_get_next_command(cmd))
> +			ret = IRQ_WAKE_THREAD;
> +	} else  {
>  		dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>  			 status, cmd->opcode, cmd->arg,
>  			 cmd->flags, cmd->mrq->stop ? 1 : 0);
> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>  {
>  	struct meson_host *host = dev_id;
>  	struct mmc_command *next_cmd, *cmd = host->cmd;
> -	struct mmc_data *data;
> -	unsigned int xfer_bytes;
>
>  	if (WARN_ON(!cmd))
>  		return IRQ_NONE;
>
> -	data = cmd->data;
> -	if (data && data->flags & MMC_DATA_READ) {
> -		xfer_bytes = data->blksz * data->blocks;
> -		WARN_ON(xfer_bytes > host->bounce_buf_size);
> -		sg_copy_from_buffer(data->sg, data->sg_len,
> -				    host->bounce_buf, xfer_bytes);
> -		data->bytes_xfered = xfer_bytes;
> -	}
> -
>  	next_cmd = meson_mmc_get_next_command(cmd);
> -	if (next_cmd)
> -		meson_mmc_start_cmd(host->mmc, next_cmd);
> -	else
> -		meson_mmc_request_done(host->mmc, cmd->mrq);
> +	meson_mmc_start_cmd(host->mmc, next_cmd);
>
>  	return IRQ_HANDLED;
>  }
> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>  	.request	= meson_mmc_request,
>  	.set_ios	= meson_mmc_set_ios,
>  	.get_cd         = meson_mmc_get_cd,
> +	.pre_req	= meson_mmc_pre_req,
> +	.post_req	= meson_mmc_post_req,
>  };
>
>  static int meson_mmc_probe(struct platform_device *pdev)
> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>
>  	mmc->caps |= MMC_CAP_CMD23;
>  	mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
> -	mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
> -
> -	/* data bounce buffer */
> -	host->bounce_buf_size = mmc->max_req_size;
> -	host->bounce_buf =
> -		dma_alloc_coherent(host->dev, host->bounce_buf_size,
> -				   &host->bounce_dma_addr, GFP_KERNEL);
> -	if (host->bounce_buf == NULL) {
> -		dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
> +	mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
> +	mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
> +	mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
> +
> +	host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
> +					 &host->descs_dma_addr, GFP_KERNEL);
> +	if (!host->descs) {
> +		dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>  		ret = -ENOMEM;
>  		goto err_div_clk;
>  	}
> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>  	/* disable interrupts */
>  	writel(0, host->regs + SD_EMMC_IRQ_EN);
>
> -	dma_free_coherent(host->dev, host->bounce_buf_size,
> -			  host->bounce_buf, host->bounce_dma_addr);
> +	dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
> +			  host->descs_dma_addr);
>
>  	clk_disable_unprepare(host->cfg_div_clk);
>  	clk_disable_unprepare(host->core_clk);
>

compared to the patches 1...5 there is absolutely no change to patches 
1, 2, 4 and the above. Neither syslog nor performance.

regards
Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 18.03.2017 um 09:11 schrieb Helmut Klein:
> On 17.03.2017 20:54, Heiner Kallweit wrote:
>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>> Hallo Heiner,
>>>>>
>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>
>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>
>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>
>>>>> But:
>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>
>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>
>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>> The board I test on supports block devices only.
>>>>
>>>> Could you please share few more details:
>>>> - Drivers involved
>>>> - All syslog messages related to the device / driver
>>>>
>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>> Others might find your feedback helpful too.
>>>>
>>>> Thanks, Heiner
>>>>
>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>
>>>>> regards
>>>>> Helmut
>>>>>
>>>>
>>>>
>>>
>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>
>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>
>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>
>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>
>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>
>>>
>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>
>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>> [    2.124761] mmc2: Skipping voltage switch
>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>> [    2.164206]  mmcblk2: p1 p2
>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>
>>> this is the output after adding patch 3
>>>
>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>> [    2.124874] mmc2: Skipping voltage switch
>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>> [    2.163910]  mmcblk2: p1 p2
>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>
>>> and this is the output after adding patches 4 & 5
>>>
>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>> [    2.120693] mmc2: Skipping voltage switch
>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>> [    2.159402]  mmcblk2: p1 p2
>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>
>>> regards
>>> Helmut
>>>
>>
>> Thanks a lot for the additional information. The first version of the patch
>> set broke byte mode obviously (block mode is working fine).
>>
>> Before submitting a new version of the patch set:
>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>> following one and re-test?
>>
>> Thanks, Heiner
>>
>> ---
>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 6bfd3da9..ca685902 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -121,6 +121,13 @@
>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>  #define MUX_CLK_NUM_PARENTS 2
>>
>> +struct sd_emmc_desc {
>> +    u32 cmd_cfg;
>> +    u32 cmd_arg;
>> +    u32 cmd_data;
>> +    u32 cmd_resp;
>> +};
>> +
>>  struct meson_host {
>>      struct    device        *dev;
>>      struct    mmc_host    *mmc;
>> @@ -136,19 +143,12 @@ struct meson_host {
>>      struct clk_divider cfg_div;
>>      struct clk *cfg_div_clk;
>>
>> -    unsigned int bounce_buf_size;
>> -    void *bounce_buf;
>> -    dma_addr_t bounce_dma_addr;
>> +    struct sd_emmc_desc *descs;
>> +    dma_addr_t descs_dma_addr;
>>
>>      bool vqmmc_enabled;
>>  };
>>
>> -struct sd_emmc_desc {
>> -    u32 cmd_cfg;
>> -    u32 cmd_arg;
>> -    u32 cmd_data;
>> -    u32 cmd_resp;
>> -};
>>  #define CMD_CFG_LENGTH_SHIFT 0
>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>          return NULL;
>>  }
>>
>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>> +{
>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>> +}
>> +
>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>> +{
>> +    struct mmc_data *data = mrq->data;
>> +
>> +    if (!data)
>> +        return;
>> +
>> +    data->host_cookie = true;
>> +
>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>> +                    meson_mmc_get_data_dir(data));
>> +    if (!data->sg_count)
>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>> +}
>> +
>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>> +                   int err)
>> +{
>> +    struct mmc_data *data = mrq->data;
>> +
>> +    if (data && data->sg_count)
>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>> +                 meson_mmc_get_data_dir(data));
>> +}
>> +
>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>  {
>>      struct mmc_host *mmc = host->mmc;
>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>  {
>>      struct meson_host *host = mmc_priv(mmc);
>> -    struct sd_emmc_desc *desc, desc_tmp;
>> -    u32 cfg;
>> -    u8 blk_len, cmd_cfg_timeout;
>> -    unsigned int xfer_bytes = 0;
>> +    struct sd_emmc_desc *desc = host->descs;
>> +    struct mmc_data *data = cmd->data;
>> +    struct scatterlist *sg;
>> +    u32 cfg, cmd_cfg = 0;
>> +    u8 blk_len;
>> +    int i;
>>
>> -    /* Setup descriptors */
>>      dma_rmb();
>> -    desc = &desc_tmp;
>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>
>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>> -        CMD_CFG_CMD_INDEX_SHIFT;
>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>> -    desc->cmd_arg = cmd->arg;
>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>> +           CMD_CFG_CMD_INDEX_SHIFT;
>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>
>>      /* Response */
>>      if (cmd->flags & MMC_RSP_PRESENT) {
>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>          if (cmd->flags & MMC_RSP_136)
>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>> -        desc->cmd_resp = 0;
>> +            cmd_cfg |= CMD_CFG_RESP_128;
>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>
>>          if (!(cmd->flags & MMC_RSP_CRC))
>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>
>>          if (cmd->flags & MMC_RSP_BUSY)
>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>> +            cmd_cfg |= CMD_CFG_R1B;
>>      } else {
>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>      }
>>
>> -    /* data? */
>> -    if (cmd->data) {
>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>> -        if (cmd->data->blocks > 1) {
>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>> -            desc->cmd_cfg |=
>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>> -                CMD_CFG_LENGTH_SHIFT;
>> +    if (data) {
>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>> +
>> +        if (data->blocks > 1) {
>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>
>>              /* check if block-size matches, if not update */
>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>> -                    __func__, blk_len,
>> -                    ilog2(cmd->data->blksz));
>> -                blk_len = ilog2(cmd->data->blksz);
>> +            if (blk_len != ilog2(data->blksz)) {
>> +                dev_dbg(host->dev,
>> +                    "%s: update blk_len %d -> %d\n",
>> +                    __func__, blk_len, ilog2(data->blksz));
>> +                blk_len = ilog2(data->blksz);
>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>              }
>> -        } else {
>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>> -            desc->cmd_cfg |=
>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>> -                CMD_CFG_LENGTH_SHIFT;
>>          }
>>
>> -        cmd->data->bytes_xfered = 0;
>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>> -                      host->bounce_buf, xfer_bytes);
>> -            cmd->data->bytes_xfered = xfer_bytes;
>> -            dma_wmb();
>> -        } else {
>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>> -        }
>> +        data->bytes_xfered = 0;
>> +        if (data->flags & MMC_DATA_WRITE)
>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>
>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>> +               CMD_CFG_TIMEOUT_SHIFT;
>> +
>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>> +            unsigned int len = sg_dma_len(sg);
>> +
>> +            if (data->blocks > 1)
>> +                len /= data->blksz;
>> +
>> +            desc[i].cmd_cfg = cmd_cfg;
>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>> +                       CMD_CFG_LENGTH_SHIFT;
>> +            if (i > 0)
>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>> +            desc[i].cmd_arg = cmd->arg;
>> +            desc[i].cmd_resp = 0;
>> +            desc[i].cmd_data = sg_dma_address(sg);
>> +        }
>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>
>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>      } else {
>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>> +        desc[0].cmd_cfg = cmd_cfg;
>> +        desc[0].cmd_arg = cmd->arg;
>> +        desc[0].cmd_resp = 0;
>> +        desc[0].cmd_data = 0;
>>      }
>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>> -        CMD_CFG_TIMEOUT_SHIFT;
>>
>>      host->cmd = cmd;
>>
>> -    /* Last descriptor */
>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>      wmb(); /* ensure descriptor is written before kicked */
>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>> +    writel(cfg, host->regs + SD_EMMC_START);
>>  }
>>
>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>  {
>>      struct meson_host *host = mmc_priv(mmc);
>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>> +
>> +    if (needs_pre_post_req)
>> +        meson_mmc_pre_req(mmc, mrq);
>>
>>      /* Stop execution */
>>      writel(0, host->regs + SD_EMMC_START);
>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>      else
>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>> +
>> +    if (needs_pre_post_req)
>> +        meson_mmc_post_req(mmc, mrq, 0);
>>  }
>>
>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>  {
>>      struct meson_host *host = dev_id;
>>      struct mmc_command *cmd;
>> +    struct mmc_data *data;
>>      u32 irq_en, status, raw_status;
>>      irqreturn_t ret = IRQ_HANDLED;
>>
>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>      if (WARN_ON(!cmd))
>>          return IRQ_NONE;
>>
>> +    data = cmd->data;
>> +
>>      spin_lock(&host->lock);
>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>          cmd->error = -ETIMEDOUT;
>>      }
>> +
>> +    if (data && !cmd->error)
>> +        data->bytes_xfered = data->blksz * data->blocks;
>> +
>>      if (status & IRQ_SDIO)
>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>
>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>> -        ret = IRQ_WAKE_THREAD;
>> -    else  {
>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>> +        if (meson_mmc_get_next_command(cmd))
>> +            ret = IRQ_WAKE_THREAD;
>> +    } else  {
>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>               status, cmd->opcode, cmd->arg,
>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>  {
>>      struct meson_host *host = dev_id;
>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>> -    struct mmc_data *data;
>> -    unsigned int xfer_bytes;
>>
>>      if (WARN_ON(!cmd))
>>          return IRQ_NONE;
>>
>> -    data = cmd->data;
>> -    if (data && data->flags & MMC_DATA_READ) {
>> -        xfer_bytes = data->blksz * data->blocks;
>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>> -                    host->bounce_buf, xfer_bytes);
>> -        data->bytes_xfered = xfer_bytes;
>> -    }
>> -
>>      next_cmd = meson_mmc_get_next_command(cmd);
>> -    if (next_cmd)
>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>> -    else
>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>
>>      return IRQ_HANDLED;
>>  }
>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>      .request    = meson_mmc_request,
>>      .set_ios    = meson_mmc_set_ios,
>>      .get_cd         = meson_mmc_get_cd,
>> +    .pre_req    = meson_mmc_pre_req,
>> +    .post_req    = meson_mmc_post_req,
>>  };
>>
>>  static int meson_mmc_probe(struct platform_device *pdev)
>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>
>>      mmc->caps |= MMC_CAP_CMD23;
>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>> -
>> -    /* data bounce buffer */
>> -    host->bounce_buf_size = mmc->max_req_size;
>> -    host->bounce_buf =
>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>> -    if (host->bounce_buf == NULL) {
>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>> +
>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>> +                     &host->descs_dma_addr, GFP_KERNEL);
>> +    if (!host->descs) {
>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>          ret = -ENOMEM;
>>          goto err_div_clk;
>>      }
>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>      /* disable interrupts */
>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>
>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>> -              host->bounce_buf, host->bounce_dma_addr);
>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>> +              host->descs_dma_addr);
>>
>>      clk_disable_unprepare(host->cfg_div_clk);
>>      clk_disable_unprepare(host->core_clk);
>>
> 
> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
> 
Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.

After patches 1, 2, 4 the system is still working normally?
And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output? 
In DEBUG mode mode brcmfmac driver logs all SDIO transfers.

Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
or just specific ones fail.

Thanks, Heiner

> regards
> Helmut
> 

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 18.03.2017 um 09:11 schrieb Helmut Klein:
> On 17.03.2017 20:54, Heiner Kallweit wrote:
>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>> Hallo Heiner,
>>>>>
>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>
>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>
>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>
>>>>> But:
>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>
>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>
>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>> The board I test on supports block devices only.
>>>>
>>>> Could you please share few more details:
>>>> - Drivers involved
>>>> - All syslog messages related to the device / driver
>>>>
>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>> Others might find your feedback helpful too.
>>>>
>>>> Thanks, Heiner
>>>>
>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>
>>>>> regards
>>>>> Helmut
>>>>>
>>>>
>>>>
>>>
>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>
>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>
>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>
>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>
>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>
>>>
>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>
>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>> [    2.124761] mmc2: Skipping voltage switch
>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>> [    2.164206]  mmcblk2: p1 p2
>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>
>>> this is the output after adding patch 3
>>>
>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>> [    2.124874] mmc2: Skipping voltage switch
>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>> [    2.163910]  mmcblk2: p1 p2
>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>
>>> and this is the output after adding patches 4 & 5
>>>
>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>> [    2.120693] mmc2: Skipping voltage switch
>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>> [    2.159402]  mmcblk2: p1 p2
>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>
>>> regards
>>> Helmut
>>>
>>
>> Thanks a lot for the additional information. The first version of the patch
>> set broke byte mode obviously (block mode is working fine).
>>
>> Before submitting a new version of the patch set:
>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>> following one and re-test?
>>
>> Thanks, Heiner
>>
>> ---
>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 6bfd3da9..ca685902 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -121,6 +121,13 @@
>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>  #define MUX_CLK_NUM_PARENTS 2
>>
>> +struct sd_emmc_desc {
>> +    u32 cmd_cfg;
>> +    u32 cmd_arg;
>> +    u32 cmd_data;
>> +    u32 cmd_resp;
>> +};
>> +
>>  struct meson_host {
>>      struct    device        *dev;
>>      struct    mmc_host    *mmc;
>> @@ -136,19 +143,12 @@ struct meson_host {
>>      struct clk_divider cfg_div;
>>      struct clk *cfg_div_clk;
>>
>> -    unsigned int bounce_buf_size;
>> -    void *bounce_buf;
>> -    dma_addr_t bounce_dma_addr;
>> +    struct sd_emmc_desc *descs;
>> +    dma_addr_t descs_dma_addr;
>>
>>      bool vqmmc_enabled;
>>  };
>>
>> -struct sd_emmc_desc {
>> -    u32 cmd_cfg;
>> -    u32 cmd_arg;
>> -    u32 cmd_data;
>> -    u32 cmd_resp;
>> -};
>>  #define CMD_CFG_LENGTH_SHIFT 0
>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>          return NULL;
>>  }
>>
>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>> +{
>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>> +}
>> +
>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>> +{
>> +    struct mmc_data *data = mrq->data;
>> +
>> +    if (!data)
>> +        return;
>> +
>> +    data->host_cookie = true;
>> +
>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>> +                    meson_mmc_get_data_dir(data));
>> +    if (!data->sg_count)
>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>> +}
>> +
>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>> +                   int err)
>> +{
>> +    struct mmc_data *data = mrq->data;
>> +
>> +    if (data && data->sg_count)
>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>> +                 meson_mmc_get_data_dir(data));
>> +}
>> +
>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>  {
>>      struct mmc_host *mmc = host->mmc;
>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>  {
>>      struct meson_host *host = mmc_priv(mmc);
>> -    struct sd_emmc_desc *desc, desc_tmp;
>> -    u32 cfg;
>> -    u8 blk_len, cmd_cfg_timeout;
>> -    unsigned int xfer_bytes = 0;
>> +    struct sd_emmc_desc *desc = host->descs;
>> +    struct mmc_data *data = cmd->data;
>> +    struct scatterlist *sg;
>> +    u32 cfg, cmd_cfg = 0;
>> +    u8 blk_len;
>> +    int i;
>>
>> -    /* Setup descriptors */
>>      dma_rmb();
>> -    desc = &desc_tmp;
>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>
>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>> -        CMD_CFG_CMD_INDEX_SHIFT;
>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>> -    desc->cmd_arg = cmd->arg;
>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>> +           CMD_CFG_CMD_INDEX_SHIFT;
>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>
>>      /* Response */
>>      if (cmd->flags & MMC_RSP_PRESENT) {
>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>          if (cmd->flags & MMC_RSP_136)
>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>> -        desc->cmd_resp = 0;
>> +            cmd_cfg |= CMD_CFG_RESP_128;
>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>
>>          if (!(cmd->flags & MMC_RSP_CRC))
>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>
>>          if (cmd->flags & MMC_RSP_BUSY)
>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>> +            cmd_cfg |= CMD_CFG_R1B;
>>      } else {
>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>      }
>>
>> -    /* data? */
>> -    if (cmd->data) {
>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>> -        if (cmd->data->blocks > 1) {
>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>> -            desc->cmd_cfg |=
>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>> -                CMD_CFG_LENGTH_SHIFT;
>> +    if (data) {
>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>> +
>> +        if (data->blocks > 1) {
>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>
>>              /* check if block-size matches, if not update */
>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>> -                    __func__, blk_len,
>> -                    ilog2(cmd->data->blksz));
>> -                blk_len = ilog2(cmd->data->blksz);
>> +            if (blk_len != ilog2(data->blksz)) {
>> +                dev_dbg(host->dev,
>> +                    "%s: update blk_len %d -> %d\n",
>> +                    __func__, blk_len, ilog2(data->blksz));
>> +                blk_len = ilog2(data->blksz);
>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>              }
>> -        } else {
>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>> -            desc->cmd_cfg |=
>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>> -                CMD_CFG_LENGTH_SHIFT;
>>          }
>>
>> -        cmd->data->bytes_xfered = 0;
>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>> -                      host->bounce_buf, xfer_bytes);
>> -            cmd->data->bytes_xfered = xfer_bytes;
>> -            dma_wmb();
>> -        } else {
>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>> -        }
>> +        data->bytes_xfered = 0;
>> +        if (data->flags & MMC_DATA_WRITE)
>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>
>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>> +               CMD_CFG_TIMEOUT_SHIFT;
>> +
>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>> +            unsigned int len = sg_dma_len(sg);
>> +
>> +            if (data->blocks > 1)
>> +                len /= data->blksz;
>> +
>> +            desc[i].cmd_cfg = cmd_cfg;
>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>> +                       CMD_CFG_LENGTH_SHIFT;
>> +            if (i > 0)
>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>> +            desc[i].cmd_arg = cmd->arg;
>> +            desc[i].cmd_resp = 0;
>> +            desc[i].cmd_data = sg_dma_address(sg);
>> +        }
>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>
>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>      } else {
>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>> +        desc[0].cmd_cfg = cmd_cfg;
>> +        desc[0].cmd_arg = cmd->arg;
>> +        desc[0].cmd_resp = 0;
>> +        desc[0].cmd_data = 0;
>>      }
>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>> -        CMD_CFG_TIMEOUT_SHIFT;
>>
>>      host->cmd = cmd;
>>
>> -    /* Last descriptor */
>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>      wmb(); /* ensure descriptor is written before kicked */
>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>> +    writel(cfg, host->regs + SD_EMMC_START);
>>  }
>>
>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>  {
>>      struct meson_host *host = mmc_priv(mmc);
>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>> +
>> +    if (needs_pre_post_req)
>> +        meson_mmc_pre_req(mmc, mrq);
>>
>>      /* Stop execution */
>>      writel(0, host->regs + SD_EMMC_START);
>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>      else
>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>> +
>> +    if (needs_pre_post_req)
>> +        meson_mmc_post_req(mmc, mrq, 0);
>>  }
>>
>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>  {
>>      struct meson_host *host = dev_id;
>>      struct mmc_command *cmd;
>> +    struct mmc_data *data;
>>      u32 irq_en, status, raw_status;
>>      irqreturn_t ret = IRQ_HANDLED;
>>
>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>      if (WARN_ON(!cmd))
>>          return IRQ_NONE;
>>
>> +    data = cmd->data;
>> +
>>      spin_lock(&host->lock);
>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>          cmd->error = -ETIMEDOUT;
>>      }
>> +
>> +    if (data && !cmd->error)
>> +        data->bytes_xfered = data->blksz * data->blocks;
>> +
>>      if (status & IRQ_SDIO)
>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>
>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>> -        ret = IRQ_WAKE_THREAD;
>> -    else  {
>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>> +        if (meson_mmc_get_next_command(cmd))
>> +            ret = IRQ_WAKE_THREAD;
>> +    } else  {
>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>               status, cmd->opcode, cmd->arg,
>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>  {
>>      struct meson_host *host = dev_id;
>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>> -    struct mmc_data *data;
>> -    unsigned int xfer_bytes;
>>
>>      if (WARN_ON(!cmd))
>>          return IRQ_NONE;
>>
>> -    data = cmd->data;
>> -    if (data && data->flags & MMC_DATA_READ) {
>> -        xfer_bytes = data->blksz * data->blocks;
>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>> -                    host->bounce_buf, xfer_bytes);
>> -        data->bytes_xfered = xfer_bytes;
>> -    }
>> -
>>      next_cmd = meson_mmc_get_next_command(cmd);
>> -    if (next_cmd)
>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>> -    else
>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>
>>      return IRQ_HANDLED;
>>  }
>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>      .request    = meson_mmc_request,
>>      .set_ios    = meson_mmc_set_ios,
>>      .get_cd         = meson_mmc_get_cd,
>> +    .pre_req    = meson_mmc_pre_req,
>> +    .post_req    = meson_mmc_post_req,
>>  };
>>
>>  static int meson_mmc_probe(struct platform_device *pdev)
>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>
>>      mmc->caps |= MMC_CAP_CMD23;
>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>> -
>> -    /* data bounce buffer */
>> -    host->bounce_buf_size = mmc->max_req_size;
>> -    host->bounce_buf =
>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>> -    if (host->bounce_buf == NULL) {
>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>> +
>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>> +                     &host->descs_dma_addr, GFP_KERNEL);
>> +    if (!host->descs) {
>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>          ret = -ENOMEM;
>>          goto err_div_clk;
>>      }
>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>      /* disable interrupts */
>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>
>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>> -              host->bounce_buf, host->bounce_dma_addr);
>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>> +              host->descs_dma_addr);
>>
>>      clk_disable_unprepare(host->cfg_div_clk);
>>      clk_disable_unprepare(host->core_clk);
>>
> 
> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
> 
Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.

After patches 1, 2, 4 the system is still working normally?
And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output? 
In DEBUG mode mode brcmfmac driver logs all SDIO transfers.

Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
or just specific ones fail.

Thanks, Heiner

> regards
> Helmut
> 

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 18.03.2017 11:24, Heiner Kallweit wrote:
> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>
>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>
>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>
>>>>>> But:
>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>
>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>
>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>> The board I test on supports block devices only.
>>>>>
>>>>> Could you please share few more details:
>>>>> - Drivers involved
>>>>> - All syslog messages related to the device / driver
>>>>>
>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>> Others might find your feedback helpful too.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>
>>>>>> regards
>>>>>> Helmut
>>>>>>
>>>>>
>>>>>
>>>>
>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>
>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>
>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>
>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>
>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>
>>>>
>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>
>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>> [    2.124761] mmc2: Skipping voltage switch
>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>> [    2.164206]  mmcblk2: p1 p2
>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>
>>>> this is the output after adding patch 3
>>>>
>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>> [    2.124874] mmc2: Skipping voltage switch
>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>> [    2.163910]  mmcblk2: p1 p2
>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>
>>>> and this is the output after adding patches 4 & 5
>>>>
>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>> [    2.120693] mmc2: Skipping voltage switch
>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>> [    2.159402]  mmcblk2: p1 p2
>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>
>>>> regards
>>>> Helmut
>>>>
>>>
>>> Thanks a lot for the additional information. The first version of the patch
>>> set broke byte mode obviously (block mode is working fine).
>>>
>>> Before submitting a new version of the patch set:
>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>> following one and re-test?
>>>
>>> Thanks, Heiner
>>>
>>> ---
>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>> index 6bfd3da9..ca685902 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -121,6 +121,13 @@
>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>  #define MUX_CLK_NUM_PARENTS 2
>>>
>>> +struct sd_emmc_desc {
>>> +    u32 cmd_cfg;
>>> +    u32 cmd_arg;
>>> +    u32 cmd_data;
>>> +    u32 cmd_resp;
>>> +};
>>> +
>>>  struct meson_host {
>>>      struct    device        *dev;
>>>      struct    mmc_host    *mmc;
>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>      struct clk_divider cfg_div;
>>>      struct clk *cfg_div_clk;
>>>
>>> -    unsigned int bounce_buf_size;
>>> -    void *bounce_buf;
>>> -    dma_addr_t bounce_dma_addr;
>>> +    struct sd_emmc_desc *descs;
>>> +    dma_addr_t descs_dma_addr;
>>>
>>>      bool vqmmc_enabled;
>>>  };
>>>
>>> -struct sd_emmc_desc {
>>> -    u32 cmd_cfg;
>>> -    u32 cmd_arg;
>>> -    u32 cmd_data;
>>> -    u32 cmd_resp;
>>> -};
>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>          return NULL;
>>>  }
>>>
>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>> +{
>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>> +}
>>> +
>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>> +{
>>> +    struct mmc_data *data = mrq->data;
>>> +
>>> +    if (!data)
>>> +        return;
>>> +
>>> +    data->host_cookie = true;
>>> +
>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>> +                    meson_mmc_get_data_dir(data));
>>> +    if (!data->sg_count)
>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>> +}
>>> +
>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>> +                   int err)
>>> +{
>>> +    struct mmc_data *data = mrq->data;
>>> +
>>> +    if (data && data->sg_count)
>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>> +                 meson_mmc_get_data_dir(data));
>>> +}
>>> +
>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>  {
>>>      struct mmc_host *mmc = host->mmc;
>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>  {
>>>      struct meson_host *host = mmc_priv(mmc);
>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>> -    u32 cfg;
>>> -    u8 blk_len, cmd_cfg_timeout;
>>> -    unsigned int xfer_bytes = 0;
>>> +    struct sd_emmc_desc *desc = host->descs;
>>> +    struct mmc_data *data = cmd->data;
>>> +    struct scatterlist *sg;
>>> +    u32 cfg, cmd_cfg = 0;
>>> +    u8 blk_len;
>>> +    int i;
>>>
>>> -    /* Setup descriptors */
>>>      dma_rmb();
>>> -    desc = &desc_tmp;
>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>
>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>> -    desc->cmd_arg = cmd->arg;
>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>
>>>      /* Response */
>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>          if (cmd->flags & MMC_RSP_136)
>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>> -        desc->cmd_resp = 0;
>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>
>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>
>>>          if (cmd->flags & MMC_RSP_BUSY)
>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>      } else {
>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>      }
>>>
>>> -    /* data? */
>>> -    if (cmd->data) {
>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>> -        if (cmd->data->blocks > 1) {
>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>> -            desc->cmd_cfg |=
>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>> -                CMD_CFG_LENGTH_SHIFT;
>>> +    if (data) {
>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>> +
>>> +        if (data->blocks > 1) {
>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>
>>>              /* check if block-size matches, if not update */
>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>> -                    __func__, blk_len,
>>> -                    ilog2(cmd->data->blksz));
>>> -                blk_len = ilog2(cmd->data->blksz);
>>> +            if (blk_len != ilog2(data->blksz)) {
>>> +                dev_dbg(host->dev,
>>> +                    "%s: update blk_len %d -> %d\n",
>>> +                    __func__, blk_len, ilog2(data->blksz));
>>> +                blk_len = ilog2(data->blksz);
>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>              }
>>> -        } else {
>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>> -            desc->cmd_cfg |=
>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>> -                CMD_CFG_LENGTH_SHIFT;
>>>          }
>>>
>>> -        cmd->data->bytes_xfered = 0;
>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>> -                      host->bounce_buf, xfer_bytes);
>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>> -            dma_wmb();
>>> -        } else {
>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>> -        }
>>> +        data->bytes_xfered = 0;
>>> +        if (data->flags & MMC_DATA_WRITE)
>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>
>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>> +
>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>> +            unsigned int len = sg_dma_len(sg);
>>> +
>>> +            if (data->blocks > 1)
>>> +                len /= data->blksz;
>>> +
>>> +            desc[i].cmd_cfg = cmd_cfg;
>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>> +                       CMD_CFG_LENGTH_SHIFT;
>>> +            if (i > 0)
>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>> +            desc[i].cmd_arg = cmd->arg;
>>> +            desc[i].cmd_resp = 0;
>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>> +        }
>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>
>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>      } else {
>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>> +        desc[0].cmd_cfg = cmd_cfg;
>>> +        desc[0].cmd_arg = cmd->arg;
>>> +        desc[0].cmd_resp = 0;
>>> +        desc[0].cmd_data = 0;
>>>      }
>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>
>>>      host->cmd = cmd;
>>>
>>> -    /* Last descriptor */
>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>  }
>>>
>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>  {
>>>      struct meson_host *host = mmc_priv(mmc);
>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>> +
>>> +    if (needs_pre_post_req)
>>> +        meson_mmc_pre_req(mmc, mrq);
>>>
>>>      /* Stop execution */
>>>      writel(0, host->regs + SD_EMMC_START);
>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>      else
>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>> +
>>> +    if (needs_pre_post_req)
>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>  }
>>>
>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>  {
>>>      struct meson_host *host = dev_id;
>>>      struct mmc_command *cmd;
>>> +    struct mmc_data *data;
>>>      u32 irq_en, status, raw_status;
>>>      irqreturn_t ret = IRQ_HANDLED;
>>>
>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>      if (WARN_ON(!cmd))
>>>          return IRQ_NONE;
>>>
>>> +    data = cmd->data;
>>> +
>>>      spin_lock(&host->lock);
>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>          cmd->error = -ETIMEDOUT;
>>>      }
>>> +
>>> +    if (data && !cmd->error)
>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>> +
>>>      if (status & IRQ_SDIO)
>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>
>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>> -        ret = IRQ_WAKE_THREAD;
>>> -    else  {
>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>> +        if (meson_mmc_get_next_command(cmd))
>>> +            ret = IRQ_WAKE_THREAD;
>>> +    } else  {
>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>               status, cmd->opcode, cmd->arg,
>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>  {
>>>      struct meson_host *host = dev_id;
>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>> -    struct mmc_data *data;
>>> -    unsigned int xfer_bytes;
>>>
>>>      if (WARN_ON(!cmd))
>>>          return IRQ_NONE;
>>>
>>> -    data = cmd->data;
>>> -    if (data && data->flags & MMC_DATA_READ) {
>>> -        xfer_bytes = data->blksz * data->blocks;
>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>> -                    host->bounce_buf, xfer_bytes);
>>> -        data->bytes_xfered = xfer_bytes;
>>> -    }
>>> -
>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>> -    if (next_cmd)
>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>> -    else
>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>
>>>      return IRQ_HANDLED;
>>>  }
>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>      .request    = meson_mmc_request,
>>>      .set_ios    = meson_mmc_set_ios,
>>>      .get_cd         = meson_mmc_get_cd,
>>> +    .pre_req    = meson_mmc_pre_req,
>>> +    .post_req    = meson_mmc_post_req,
>>>  };
>>>
>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>
>>>      mmc->caps |= MMC_CAP_CMD23;
>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>> -
>>> -    /* data bounce buffer */
>>> -    host->bounce_buf_size = mmc->max_req_size;
>>> -    host->bounce_buf =
>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>> -    if (host->bounce_buf == NULL) {
>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>> +
>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>> +    if (!host->descs) {
>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>          ret = -ENOMEM;
>>>          goto err_div_clk;
>>>      }
>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>      /* disable interrupts */
>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>
>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>> -              host->bounce_buf, host->bounce_dma_addr);
>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>> +              host->descs_dma_addr);
>>>
>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>      clk_disable_unprepare(host->core_clk);
>>>
>>
>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>
> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>
> After patches 1, 2, 4 the system is still working normally?
> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>
> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
> or just specific ones fail.
>
> Thanks, Heiner
>
>> regards
>> Helmut
>>
>
>

i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
For the test i also changed meson-gx-mmc from built-in to module.
This resulted in a different order of the mmc devices. The sdio/wifi is 
now mmc0 and not mmc1

Without your new patch the wifi adapter works normally.

The debug info was produced with following commad sequence
  dmesg -n 8
  dmesg -D
  logger "loading meson-gx-mmc...."
  modprobe meson-gx-mmc
  sleep 1
  logger "loading brcmfmac"
  modprobe brcmfmac
  logger "modules loaded"
  sleep 1
  cp /var/log/syslog ~/syslog
  cp /proc/interrupts ~/interrupts

and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"

because of the length of the files i removed most lines of the loading 
of meson-gx-mmc

unhandled interrupts: independent of the number of applied patches i've 
always got 11 of them.
  Only the timings differed with the applied patches

the is the log for applied patches 1, 2, 4 & the new one
   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 
00000000
   [   47.371716] mmc0: new high speed SDIO card at address 0001
   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 
52000000
   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 
52000000 != actual rate 50000000
   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004890 -> 0x00004892
   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004892 -> 0x00004896
   loading brcmfmac
   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling 
brcmf_sdiod_probe...
   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731661] SDIO: Enabling device mmc0:0001:1...
   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731713] SDIO: Enabled device mmc0:0001:1
   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000a, nbytes=1
   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000b, nbytes=1
   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000c, nbytes=1
   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 
00000000
   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms 
nsac 0
   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
   [   48.731881] mmc0:     4 bytes transferred: 0
   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000 
             <<<<===== wrong!
   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 
00000000
   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 
00000000
   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 
00000000
   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000f, nbytes=1
   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms 
nsac 0
   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
   [   48.732235] mmc0:     4 bytes transferred: 0
   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, 
rev=0
   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach 
failed!
   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
   [   48.732290] brcmfmac: brcmf_detach Enter
   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
   [   48.733683] SDIO: Disabling device mmc0:0001:2...
   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.733732] SDIO: Disabled device mmc0:0001:2
   [   48.733736] SDIO: Disabling device mmc0:0001:1...
   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.733773] SDIO: Disabled device mmc0:0001:1
   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed 
-19...

this is the debug data for applied patches 1,2 & 4 (left only few lines 
after the first CMD53)
   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 
00000000
   [   52.458217] mmc0: new high speed SDIO card at address 0001
   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 
52000000
   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 
52000000 != actual rate 50000000
   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004890 -> 0x00004892
   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004892 -> 0x00004896
   loading brcmfmac
   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling 
brcmf_sdiod_probe...
   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796550] SDIO: Enabling device mmc0:0001:1...
   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796605] SDIO: Enabled device mmc0:0001:1
   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000a, nbytes=1
   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000b, nbytes=1
   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000c, nbytes=1
   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 
00000000
   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms 
nsac 0
   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
   [   53.796829] mmc0:     4 bytes transferred: 0
   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330 
               <<<<<====== ok
   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 
00000000
   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1

if you need more data: just ask ;-)

regards
Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 18.03.2017 11:24, Heiner Kallweit wrote:
> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>
>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>
>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>
>>>>>> But:
>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>
>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>
>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>> The board I test on supports block devices only.
>>>>>
>>>>> Could you please share few more details:
>>>>> - Drivers involved
>>>>> - All syslog messages related to the device / driver
>>>>>
>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>> Others might find your feedback helpful too.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>
>>>>>> regards
>>>>>> Helmut
>>>>>>
>>>>>
>>>>>
>>>>
>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>
>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>
>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>
>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>
>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>
>>>>
>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>
>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>> [    2.124761] mmc2: Skipping voltage switch
>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>> [    2.164206]  mmcblk2: p1 p2
>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>
>>>> this is the output after adding patch 3
>>>>
>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>> [    2.124874] mmc2: Skipping voltage switch
>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>> [    2.163910]  mmcblk2: p1 p2
>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>
>>>> and this is the output after adding patches 4 & 5
>>>>
>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>> [    2.120693] mmc2: Skipping voltage switch
>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>> [    2.159402]  mmcblk2: p1 p2
>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>
>>>> regards
>>>> Helmut
>>>>
>>>
>>> Thanks a lot for the additional information. The first version of the patch
>>> set broke byte mode obviously (block mode is working fine).
>>>
>>> Before submitting a new version of the patch set:
>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>> following one and re-test?
>>>
>>> Thanks, Heiner
>>>
>>> ---
>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>> index 6bfd3da9..ca685902 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -121,6 +121,13 @@
>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>  #define MUX_CLK_NUM_PARENTS 2
>>>
>>> +struct sd_emmc_desc {
>>> +    u32 cmd_cfg;
>>> +    u32 cmd_arg;
>>> +    u32 cmd_data;
>>> +    u32 cmd_resp;
>>> +};
>>> +
>>>  struct meson_host {
>>>      struct    device        *dev;
>>>      struct    mmc_host    *mmc;
>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>      struct clk_divider cfg_div;
>>>      struct clk *cfg_div_clk;
>>>
>>> -    unsigned int bounce_buf_size;
>>> -    void *bounce_buf;
>>> -    dma_addr_t bounce_dma_addr;
>>> +    struct sd_emmc_desc *descs;
>>> +    dma_addr_t descs_dma_addr;
>>>
>>>      bool vqmmc_enabled;
>>>  };
>>>
>>> -struct sd_emmc_desc {
>>> -    u32 cmd_cfg;
>>> -    u32 cmd_arg;
>>> -    u32 cmd_data;
>>> -    u32 cmd_resp;
>>> -};
>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>          return NULL;
>>>  }
>>>
>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>> +{
>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>> +}
>>> +
>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>> +{
>>> +    struct mmc_data *data = mrq->data;
>>> +
>>> +    if (!data)
>>> +        return;
>>> +
>>> +    data->host_cookie = true;
>>> +
>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>> +                    meson_mmc_get_data_dir(data));
>>> +    if (!data->sg_count)
>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>> +}
>>> +
>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>> +                   int err)
>>> +{
>>> +    struct mmc_data *data = mrq->data;
>>> +
>>> +    if (data && data->sg_count)
>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>> +                 meson_mmc_get_data_dir(data));
>>> +}
>>> +
>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>  {
>>>      struct mmc_host *mmc = host->mmc;
>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>  {
>>>      struct meson_host *host = mmc_priv(mmc);
>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>> -    u32 cfg;
>>> -    u8 blk_len, cmd_cfg_timeout;
>>> -    unsigned int xfer_bytes = 0;
>>> +    struct sd_emmc_desc *desc = host->descs;
>>> +    struct mmc_data *data = cmd->data;
>>> +    struct scatterlist *sg;
>>> +    u32 cfg, cmd_cfg = 0;
>>> +    u8 blk_len;
>>> +    int i;
>>>
>>> -    /* Setup descriptors */
>>>      dma_rmb();
>>> -    desc = &desc_tmp;
>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>
>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>> -    desc->cmd_arg = cmd->arg;
>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>
>>>      /* Response */
>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>          if (cmd->flags & MMC_RSP_136)
>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>> -        desc->cmd_resp = 0;
>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>
>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>
>>>          if (cmd->flags & MMC_RSP_BUSY)
>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>      } else {
>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>      }
>>>
>>> -    /* data? */
>>> -    if (cmd->data) {
>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>> -        if (cmd->data->blocks > 1) {
>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>> -            desc->cmd_cfg |=
>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>> -                CMD_CFG_LENGTH_SHIFT;
>>> +    if (data) {
>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>> +
>>> +        if (data->blocks > 1) {
>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>
>>>              /* check if block-size matches, if not update */
>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>> -                    __func__, blk_len,
>>> -                    ilog2(cmd->data->blksz));
>>> -                blk_len = ilog2(cmd->data->blksz);
>>> +            if (blk_len != ilog2(data->blksz)) {
>>> +                dev_dbg(host->dev,
>>> +                    "%s: update blk_len %d -> %d\n",
>>> +                    __func__, blk_len, ilog2(data->blksz));
>>> +                blk_len = ilog2(data->blksz);
>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>              }
>>> -        } else {
>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>> -            desc->cmd_cfg |=
>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>> -                CMD_CFG_LENGTH_SHIFT;
>>>          }
>>>
>>> -        cmd->data->bytes_xfered = 0;
>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>> -                      host->bounce_buf, xfer_bytes);
>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>> -            dma_wmb();
>>> -        } else {
>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>> -        }
>>> +        data->bytes_xfered = 0;
>>> +        if (data->flags & MMC_DATA_WRITE)
>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>
>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>> +
>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>> +            unsigned int len = sg_dma_len(sg);
>>> +
>>> +            if (data->blocks > 1)
>>> +                len /= data->blksz;
>>> +
>>> +            desc[i].cmd_cfg = cmd_cfg;
>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>> +                       CMD_CFG_LENGTH_SHIFT;
>>> +            if (i > 0)
>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>> +            desc[i].cmd_arg = cmd->arg;
>>> +            desc[i].cmd_resp = 0;
>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>> +        }
>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>
>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>      } else {
>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>> +        desc[0].cmd_cfg = cmd_cfg;
>>> +        desc[0].cmd_arg = cmd->arg;
>>> +        desc[0].cmd_resp = 0;
>>> +        desc[0].cmd_data = 0;
>>>      }
>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>
>>>      host->cmd = cmd;
>>>
>>> -    /* Last descriptor */
>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>  }
>>>
>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>  {
>>>      struct meson_host *host = mmc_priv(mmc);
>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>> +
>>> +    if (needs_pre_post_req)
>>> +        meson_mmc_pre_req(mmc, mrq);
>>>
>>>      /* Stop execution */
>>>      writel(0, host->regs + SD_EMMC_START);
>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>      else
>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>> +
>>> +    if (needs_pre_post_req)
>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>  }
>>>
>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>  {
>>>      struct meson_host *host = dev_id;
>>>      struct mmc_command *cmd;
>>> +    struct mmc_data *data;
>>>      u32 irq_en, status, raw_status;
>>>      irqreturn_t ret = IRQ_HANDLED;
>>>
>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>      if (WARN_ON(!cmd))
>>>          return IRQ_NONE;
>>>
>>> +    data = cmd->data;
>>> +
>>>      spin_lock(&host->lock);
>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>          cmd->error = -ETIMEDOUT;
>>>      }
>>> +
>>> +    if (data && !cmd->error)
>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>> +
>>>      if (status & IRQ_SDIO)
>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>
>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>> -        ret = IRQ_WAKE_THREAD;
>>> -    else  {
>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>> +        if (meson_mmc_get_next_command(cmd))
>>> +            ret = IRQ_WAKE_THREAD;
>>> +    } else  {
>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>               status, cmd->opcode, cmd->arg,
>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>  {
>>>      struct meson_host *host = dev_id;
>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>> -    struct mmc_data *data;
>>> -    unsigned int xfer_bytes;
>>>
>>>      if (WARN_ON(!cmd))
>>>          return IRQ_NONE;
>>>
>>> -    data = cmd->data;
>>> -    if (data && data->flags & MMC_DATA_READ) {
>>> -        xfer_bytes = data->blksz * data->blocks;
>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>> -                    host->bounce_buf, xfer_bytes);
>>> -        data->bytes_xfered = xfer_bytes;
>>> -    }
>>> -
>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>> -    if (next_cmd)
>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>> -    else
>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>
>>>      return IRQ_HANDLED;
>>>  }
>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>      .request    = meson_mmc_request,
>>>      .set_ios    = meson_mmc_set_ios,
>>>      .get_cd         = meson_mmc_get_cd,
>>> +    .pre_req    = meson_mmc_pre_req,
>>> +    .post_req    = meson_mmc_post_req,
>>>  };
>>>
>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>
>>>      mmc->caps |= MMC_CAP_CMD23;
>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>> -
>>> -    /* data bounce buffer */
>>> -    host->bounce_buf_size = mmc->max_req_size;
>>> -    host->bounce_buf =
>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>> -    if (host->bounce_buf == NULL) {
>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>> +
>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>> +    if (!host->descs) {
>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>          ret = -ENOMEM;
>>>          goto err_div_clk;
>>>      }
>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>      /* disable interrupts */
>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>
>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>> -              host->bounce_buf, host->bounce_dma_addr);
>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>> +              host->descs_dma_addr);
>>>
>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>      clk_disable_unprepare(host->core_clk);
>>>
>>
>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>
> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>
> After patches 1, 2, 4 the system is still working normally?
> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>
> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
> or just specific ones fail.
>
> Thanks, Heiner
>
>> regards
>> Helmut
>>
>
>

i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
For the test i also changed meson-gx-mmc from built-in to module.
This resulted in a different order of the mmc devices. The sdio/wifi is 
now mmc0 and not mmc1

Without your new patch the wifi adapter works normally.

The debug info was produced with following commad sequence
  dmesg -n 8
  dmesg -D
  logger "loading meson-gx-mmc...."
  modprobe meson-gx-mmc
  sleep 1
  logger "loading brcmfmac"
  modprobe brcmfmac
  logger "modules loaded"
  sleep 1
  cp /var/log/syslog ~/syslog
  cp /proc/interrupts ~/interrupts

and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"

because of the length of the files i removed most lines of the loading 
of meson-gx-mmc

unhandled interrupts: independent of the number of applied patches i've 
always got 11 of them.
  Only the timings differed with the applied patches

the is the log for applied patches 1, 2, 4 & the new one
   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 
00000000
   [   47.371716] mmc0: new high speed SDIO card at address 0001
   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 
52000000
   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 
52000000 != actual rate 50000000
   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004890 -> 0x00004892
   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004892 -> 0x00004896
   loading brcmfmac
   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling 
brcmf_sdiod_probe...
   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731661] SDIO: Enabling device mmc0:0001:1...
   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.731713] SDIO: Enabled device mmc0:0001:1
   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000a, nbytes=1
   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000b, nbytes=1
   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000c, nbytes=1
   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 
00000000
   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms 
nsac 0
   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
   [   48.731881] mmc0:     4 bytes transferred: 0
   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000 
             <<<<===== wrong!
   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 
00000000
   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 
00000000
   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 
00000000
   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000f, nbytes=1
   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms 
nsac 0
   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
   [   48.732235] mmc0:     4 bytes transferred: 0
   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, 
rev=0
   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach 
failed!
   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
   [   48.732290] brcmfmac: brcmf_detach Enter
   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
   [   48.733683] SDIO: Disabling device mmc0:0001:2...
   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.733732] SDIO: Disabled device mmc0:0001:2
   [   48.733736] SDIO: Disabling device mmc0:0001:1...
   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   48.733773] SDIO: Disabled device mmc0:0001:1
   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed 
-19...

this is the debug data for applied patches 1,2 & 4 (left only few lines 
after the first CMD53)
   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 
00000000
   [   52.458217] mmc0: new high speed SDIO card@address 0001
   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 
52000000
   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 
52000000 != actual rate 50000000
   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004890 -> 0x00004892
   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: 
SD_EMMC_CFG: 0x00004892 -> 0x00004896
   loading brcmfmac
   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling 
brcmf_sdiod_probe...
   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 
00000000
   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796550] SDIO: Enabling device mmc0:0001:1...
   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 
00000000
   [   53.796605] SDIO: Enabled device mmc0:0001:1
   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000a, nbytes=1
   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000b, nbytes=1
   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 
00000000
   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000c, nbytes=1
   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 
00000000
   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms 
nsac 0
   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
   [   53.796829] mmc0:     4 bytes transferred: 0
   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330 
               <<<<<====== ok
   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1
   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 
00000000
   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x1000e, nbytes=1
   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 
00000000
   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, 
addr=0x1000e, nbytes=1

if you need more data: just ask ;-)

regards
Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 19.03.2017 um 12:23 schrieb Helmut Klein:
> On 18.03.2017 11:24, Heiner Kallweit wrote:
>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>
>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>
>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>
>>>>>>> But:
>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>
>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>
>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>> The board I test on supports block devices only.
>>>>>>
>>>>>> Could you please share few more details:
>>>>>> - Drivers involved
>>>>>> - All syslog messages related to the device / driver
>>>>>>
>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>> Others might find your feedback helpful too.
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>
>>>>>>> regards
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>
>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>
>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>
>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>
>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>
>>>>>
>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>
>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>
>>>>> this is the output after adding patch 3
>>>>>
>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>
>>>>> and this is the output after adding patches 4 & 5
>>>>>
>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>
>>>>> regards
>>>>> Helmut
>>>>>
>>>>
>>>> Thanks a lot for the additional information. The first version of the patch
>>>> set broke byte mode obviously (block mode is working fine).
>>>>
>>>> Before submitting a new version of the patch set:
>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>> following one and re-test?
>>>>
>>>> Thanks, Heiner
>>>>
>>>> ---
>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 6bfd3da9..ca685902 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -121,6 +121,13 @@
>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>
>>>> +struct sd_emmc_desc {
>>>> +    u32 cmd_cfg;
>>>> +    u32 cmd_arg;
>>>> +    u32 cmd_data;
>>>> +    u32 cmd_resp;
>>>> +};
>>>> +
>>>>  struct meson_host {
>>>>      struct    device        *dev;
>>>>      struct    mmc_host    *mmc;
>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>      struct clk_divider cfg_div;
>>>>      struct clk *cfg_div_clk;
>>>>
>>>> -    unsigned int bounce_buf_size;
>>>> -    void *bounce_buf;
>>>> -    dma_addr_t bounce_dma_addr;
>>>> +    struct sd_emmc_desc *descs;
>>>> +    dma_addr_t descs_dma_addr;
>>>>
>>>>      bool vqmmc_enabled;
>>>>  };
>>>>
>>>> -struct sd_emmc_desc {
>>>> -    u32 cmd_cfg;
>>>> -    u32 cmd_arg;
>>>> -    u32 cmd_data;
>>>> -    u32 cmd_resp;
>>>> -};
>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>          return NULL;
>>>>  }
>>>>
>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>> +{
>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>> +}
>>>> +
>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>> +{
>>>> +    struct mmc_data *data = mrq->data;
>>>> +
>>>> +    if (!data)
>>>> +        return;
>>>> +
>>>> +    data->host_cookie = true;
>>>> +
>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>> +                    meson_mmc_get_data_dir(data));
>>>> +    if (!data->sg_count)
>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>> +}
>>>> +
>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>> +                   int err)
>>>> +{
>>>> +    struct mmc_data *data = mrq->data;
>>>> +
>>>> +    if (data && data->sg_count)
>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>> +                 meson_mmc_get_data_dir(data));
>>>> +}
>>>> +
>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>  {
>>>>      struct mmc_host *mmc = host->mmc;
>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>  {
>>>>      struct meson_host *host = mmc_priv(mmc);
>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>> -    u32 cfg;
>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>> -    unsigned int xfer_bytes = 0;
>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>> +    struct mmc_data *data = cmd->data;
>>>> +    struct scatterlist *sg;
>>>> +    u32 cfg, cmd_cfg = 0;
>>>> +    u8 blk_len;
>>>> +    int i;
>>>>
>>>> -    /* Setup descriptors */
>>>>      dma_rmb();
>>>> -    desc = &desc_tmp;
>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>
>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>> -    desc->cmd_arg = cmd->arg;
>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>
>>>>      /* Response */
>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>          if (cmd->flags & MMC_RSP_136)
>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>> -        desc->cmd_resp = 0;
>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>
>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>
>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>      } else {
>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>      }
>>>>
>>>> -    /* data? */
>>>> -    if (cmd->data) {
>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>> -        if (cmd->data->blocks > 1) {
>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>> -            desc->cmd_cfg |=
>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>> +    if (data) {
>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>> +
>>>> +        if (data->blocks > 1) {
>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>
>>>>              /* check if block-size matches, if not update */
>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>> -                    __func__, blk_len,
>>>> -                    ilog2(cmd->data->blksz));
>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>> +                dev_dbg(host->dev,
>>>> +                    "%s: update blk_len %d -> %d\n",
>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>> +                blk_len = ilog2(data->blksz);
>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>              }
>>>> -        } else {
>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>> -            desc->cmd_cfg |=
>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>          }
>>>>
>>>> -        cmd->data->bytes_xfered = 0;
>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>> -                      host->bounce_buf, xfer_bytes);
>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>> -            dma_wmb();
>>>> -        } else {
>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>> -        }
>>>> +        data->bytes_xfered = 0;
>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>
>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>> +
>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>> +            unsigned int len = sg_dma_len(sg);
>>>> +
>>>> +            if (data->blocks > 1)
>>>> +                len /= data->blksz;
>>>> +
>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>> +            if (i > 0)
>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>> +            desc[i].cmd_arg = cmd->arg;
>>>> +            desc[i].cmd_resp = 0;
>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>> +        }
>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>
>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>      } else {
>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>> +        desc[0].cmd_arg = cmd->arg;
>>>> +        desc[0].cmd_resp = 0;
>>>> +        desc[0].cmd_data = 0;
>>>>      }
>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>
>>>>      host->cmd = cmd;
>>>>
>>>> -    /* Last descriptor */
>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>  }
>>>>
>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>  {
>>>>      struct meson_host *host = mmc_priv(mmc);
>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>> +
>>>> +    if (needs_pre_post_req)
>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>
>>>>      /* Stop execution */
>>>>      writel(0, host->regs + SD_EMMC_START);
>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>      else
>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>> +
>>>> +    if (needs_pre_post_req)
>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>  }
>>>>
>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>  {
>>>>      struct meson_host *host = dev_id;
>>>>      struct mmc_command *cmd;
>>>> +    struct mmc_data *data;
>>>>      u32 irq_en, status, raw_status;
>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>
>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>      if (WARN_ON(!cmd))
>>>>          return IRQ_NONE;
>>>>
>>>> +    data = cmd->data;
>>>> +
>>>>      spin_lock(&host->lock);
>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>          cmd->error = -ETIMEDOUT;
>>>>      }
>>>> +
>>>> +    if (data && !cmd->error)
>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>> +
>>>>      if (status & IRQ_SDIO)
>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>
>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>> -        ret = IRQ_WAKE_THREAD;
>>>> -    else  {
>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>> +        if (meson_mmc_get_next_command(cmd))
>>>> +            ret = IRQ_WAKE_THREAD;
>>>> +    } else  {
>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>               status, cmd->opcode, cmd->arg,
>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>  {
>>>>      struct meson_host *host = dev_id;
>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>> -    struct mmc_data *data;
>>>> -    unsigned int xfer_bytes;
>>>>
>>>>      if (WARN_ON(!cmd))
>>>>          return IRQ_NONE;
>>>>
>>>> -    data = cmd->data;
>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>> -                    host->bounce_buf, xfer_bytes);
>>>> -        data->bytes_xfered = xfer_bytes;
>>>> -    }
>>>> -
>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>> -    if (next_cmd)
>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>> -    else
>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>
>>>>      return IRQ_HANDLED;
>>>>  }
>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>      .request    = meson_mmc_request,
>>>>      .set_ios    = meson_mmc_set_ios,
>>>>      .get_cd         = meson_mmc_get_cd,
>>>> +    .pre_req    = meson_mmc_pre_req,
>>>> +    .post_req    = meson_mmc_post_req,
>>>>  };
>>>>
>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>
>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>> -
>>>> -    /* data bounce buffer */
>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>> -    host->bounce_buf =
>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>> -    if (host->bounce_buf == NULL) {
>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>> +
>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>> +    if (!host->descs) {
>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>          ret = -ENOMEM;
>>>>          goto err_div_clk;
>>>>      }
>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>      /* disable interrupts */
>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>
>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>> +              host->descs_dma_addr);
>>>>
>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>      clk_disable_unprepare(host->core_clk);
>>>>
>>>
>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>
>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>
>> After patches 1, 2, 4 the system is still working normally?
>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>
>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>> or just specific ones fail.
>>
>> Thanks, Heiner
>>
>>> regards
>>> Helmut
>>>
>>
>>
> 
> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
> For the test i also changed meson-gx-mmc from built-in to module.
> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
> 
> Without your new patch the wifi adapter works normally.
> 
> The debug info was produced with following commad sequence
>  dmesg -n 8
>  dmesg -D
>  logger "loading meson-gx-mmc...."
>  modprobe meson-gx-mmc
>  sleep 1
>  logger "loading brcmfmac"
>  modprobe brcmfmac
>  logger "modules loaded"
>  sleep 1
>  cp /var/log/syslog ~/syslog
>  cp /proc/interrupts ~/interrupts
> 
> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
> 
> because of the length of the files i removed most lines of the loading of meson-gx-mmc
> 
> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>  Only the timings differed with the applied patches
> 
> the is the log for applied patches 1, 2, 4 & the new one
>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>   loading brcmfmac
>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>   [   48.731881] mmc0:     4 bytes transferred: 0
>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>   [   48.732235] mmc0:     4 bytes transferred: 0
>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>   [   48.732290] brcmfmac: brcmf_detach Enter
>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
> 
> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>   loading brcmfmac
>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>   [   53.796829] mmc0:     4 bytes transferred: 0
>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
> 
> if you need more data: just ask ;-)
> 
Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
Could you please apply the following on top of 1, 2, 4, new one and send the log?
I hope the two debug messages bring me closer to the root cause of the issue.

Rgds, Heiner


diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 3b3ddf3e..d6d2d1a1 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 		for_each_sg(data->sg, sg, data->sg_count, i) {
 			unsigned int len = sg_dma_len(sg);
 
+			if (cmd->opcode == 53)
+				dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
+
 			if (data->blocks > 1)
 				len /= data->blksz;
 
@@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 
 	meson_mmc_read_resp(host->mmc, cmd);
 
+	if (cmd->opcode == 53)
+		dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
+
 	cmd->error = 0;
 	if (status & IRQ_RXD_ERR_MASK) {
 		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
-- 
2.12.0






> regards
> Helmut
> 

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 19.03.2017 um 12:23 schrieb Helmut Klein:
> On 18.03.2017 11:24, Heiner Kallweit wrote:
>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>
>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>
>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>
>>>>>>> But:
>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>
>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>
>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>> The board I test on supports block devices only.
>>>>>>
>>>>>> Could you please share few more details:
>>>>>> - Drivers involved
>>>>>> - All syslog messages related to the device / driver
>>>>>>
>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>> Others might find your feedback helpful too.
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>
>>>>>>> regards
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>
>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>
>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>
>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>
>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>
>>>>>
>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>
>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>
>>>>> this is the output after adding patch 3
>>>>>
>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>
>>>>> and this is the output after adding patches 4 & 5
>>>>>
>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>
>>>>> regards
>>>>> Helmut
>>>>>
>>>>
>>>> Thanks a lot for the additional information. The first version of the patch
>>>> set broke byte mode obviously (block mode is working fine).
>>>>
>>>> Before submitting a new version of the patch set:
>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>> following one and re-test?
>>>>
>>>> Thanks, Heiner
>>>>
>>>> ---
>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 6bfd3da9..ca685902 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -121,6 +121,13 @@
>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>
>>>> +struct sd_emmc_desc {
>>>> +    u32 cmd_cfg;
>>>> +    u32 cmd_arg;
>>>> +    u32 cmd_data;
>>>> +    u32 cmd_resp;
>>>> +};
>>>> +
>>>>  struct meson_host {
>>>>      struct    device        *dev;
>>>>      struct    mmc_host    *mmc;
>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>      struct clk_divider cfg_div;
>>>>      struct clk *cfg_div_clk;
>>>>
>>>> -    unsigned int bounce_buf_size;
>>>> -    void *bounce_buf;
>>>> -    dma_addr_t bounce_dma_addr;
>>>> +    struct sd_emmc_desc *descs;
>>>> +    dma_addr_t descs_dma_addr;
>>>>
>>>>      bool vqmmc_enabled;
>>>>  };
>>>>
>>>> -struct sd_emmc_desc {
>>>> -    u32 cmd_cfg;
>>>> -    u32 cmd_arg;
>>>> -    u32 cmd_data;
>>>> -    u32 cmd_resp;
>>>> -};
>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>          return NULL;
>>>>  }
>>>>
>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>> +{
>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>> +}
>>>> +
>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>> +{
>>>> +    struct mmc_data *data = mrq->data;
>>>> +
>>>> +    if (!data)
>>>> +        return;
>>>> +
>>>> +    data->host_cookie = true;
>>>> +
>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>> +                    meson_mmc_get_data_dir(data));
>>>> +    if (!data->sg_count)
>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>> +}
>>>> +
>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>> +                   int err)
>>>> +{
>>>> +    struct mmc_data *data = mrq->data;
>>>> +
>>>> +    if (data && data->sg_count)
>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>> +                 meson_mmc_get_data_dir(data));
>>>> +}
>>>> +
>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>  {
>>>>      struct mmc_host *mmc = host->mmc;
>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>  {
>>>>      struct meson_host *host = mmc_priv(mmc);
>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>> -    u32 cfg;
>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>> -    unsigned int xfer_bytes = 0;
>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>> +    struct mmc_data *data = cmd->data;
>>>> +    struct scatterlist *sg;
>>>> +    u32 cfg, cmd_cfg = 0;
>>>> +    u8 blk_len;
>>>> +    int i;
>>>>
>>>> -    /* Setup descriptors */
>>>>      dma_rmb();
>>>> -    desc = &desc_tmp;
>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>
>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>> -    desc->cmd_arg = cmd->arg;
>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>
>>>>      /* Response */
>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>          if (cmd->flags & MMC_RSP_136)
>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>> -        desc->cmd_resp = 0;
>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>
>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>
>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>      } else {
>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>      }
>>>>
>>>> -    /* data? */
>>>> -    if (cmd->data) {
>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>> -        if (cmd->data->blocks > 1) {
>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>> -            desc->cmd_cfg |=
>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>> +    if (data) {
>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>> +
>>>> +        if (data->blocks > 1) {
>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>
>>>>              /* check if block-size matches, if not update */
>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>> -                    __func__, blk_len,
>>>> -                    ilog2(cmd->data->blksz));
>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>> +                dev_dbg(host->dev,
>>>> +                    "%s: update blk_len %d -> %d\n",
>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>> +                blk_len = ilog2(data->blksz);
>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>              }
>>>> -        } else {
>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>> -            desc->cmd_cfg |=
>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>          }
>>>>
>>>> -        cmd->data->bytes_xfered = 0;
>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>> -                      host->bounce_buf, xfer_bytes);
>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>> -            dma_wmb();
>>>> -        } else {
>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>> -        }
>>>> +        data->bytes_xfered = 0;
>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>
>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>> +
>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>> +            unsigned int len = sg_dma_len(sg);
>>>> +
>>>> +            if (data->blocks > 1)
>>>> +                len /= data->blksz;
>>>> +
>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>> +            if (i > 0)
>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>> +            desc[i].cmd_arg = cmd->arg;
>>>> +            desc[i].cmd_resp = 0;
>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>> +        }
>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>
>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>      } else {
>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>> +        desc[0].cmd_arg = cmd->arg;
>>>> +        desc[0].cmd_resp = 0;
>>>> +        desc[0].cmd_data = 0;
>>>>      }
>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>
>>>>      host->cmd = cmd;
>>>>
>>>> -    /* Last descriptor */
>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>  }
>>>>
>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>  {
>>>>      struct meson_host *host = mmc_priv(mmc);
>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>> +
>>>> +    if (needs_pre_post_req)
>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>
>>>>      /* Stop execution */
>>>>      writel(0, host->regs + SD_EMMC_START);
>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>      else
>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>> +
>>>> +    if (needs_pre_post_req)
>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>  }
>>>>
>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>  {
>>>>      struct meson_host *host = dev_id;
>>>>      struct mmc_command *cmd;
>>>> +    struct mmc_data *data;
>>>>      u32 irq_en, status, raw_status;
>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>
>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>      if (WARN_ON(!cmd))
>>>>          return IRQ_NONE;
>>>>
>>>> +    data = cmd->data;
>>>> +
>>>>      spin_lock(&host->lock);
>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>          cmd->error = -ETIMEDOUT;
>>>>      }
>>>> +
>>>> +    if (data && !cmd->error)
>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>> +
>>>>      if (status & IRQ_SDIO)
>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>
>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>> -        ret = IRQ_WAKE_THREAD;
>>>> -    else  {
>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>> +        if (meson_mmc_get_next_command(cmd))
>>>> +            ret = IRQ_WAKE_THREAD;
>>>> +    } else  {
>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>               status, cmd->opcode, cmd->arg,
>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>  {
>>>>      struct meson_host *host = dev_id;
>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>> -    struct mmc_data *data;
>>>> -    unsigned int xfer_bytes;
>>>>
>>>>      if (WARN_ON(!cmd))
>>>>          return IRQ_NONE;
>>>>
>>>> -    data = cmd->data;
>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>> -                    host->bounce_buf, xfer_bytes);
>>>> -        data->bytes_xfered = xfer_bytes;
>>>> -    }
>>>> -
>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>> -    if (next_cmd)
>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>> -    else
>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>
>>>>      return IRQ_HANDLED;
>>>>  }
>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>      .request    = meson_mmc_request,
>>>>      .set_ios    = meson_mmc_set_ios,
>>>>      .get_cd         = meson_mmc_get_cd,
>>>> +    .pre_req    = meson_mmc_pre_req,
>>>> +    .post_req    = meson_mmc_post_req,
>>>>  };
>>>>
>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>
>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>> -
>>>> -    /* data bounce buffer */
>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>> -    host->bounce_buf =
>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>> -    if (host->bounce_buf == NULL) {
>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>> +
>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>> +    if (!host->descs) {
>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>          ret = -ENOMEM;
>>>>          goto err_div_clk;
>>>>      }
>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>      /* disable interrupts */
>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>
>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>> +              host->descs_dma_addr);
>>>>
>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>      clk_disable_unprepare(host->core_clk);
>>>>
>>>
>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>
>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>
>> After patches 1, 2, 4 the system is still working normally?
>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>
>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>> or just specific ones fail.
>>
>> Thanks, Heiner
>>
>>> regards
>>> Helmut
>>>
>>
>>
> 
> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
> For the test i also changed meson-gx-mmc from built-in to module.
> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
> 
> Without your new patch the wifi adapter works normally.
> 
> The debug info was produced with following commad sequence
>  dmesg -n 8
>  dmesg -D
>  logger "loading meson-gx-mmc...."
>  modprobe meson-gx-mmc
>  sleep 1
>  logger "loading brcmfmac"
>  modprobe brcmfmac
>  logger "modules loaded"
>  sleep 1
>  cp /var/log/syslog ~/syslog
>  cp /proc/interrupts ~/interrupts
> 
> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
> 
> because of the length of the files i removed most lines of the loading of meson-gx-mmc
> 
> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>  Only the timings differed with the applied patches
> 
> the is the log for applied patches 1, 2, 4 & the new one
>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>   loading brcmfmac
>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>   [   48.731881] mmc0:     4 bytes transferred: 0
>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>   [   48.732235] mmc0:     4 bytes transferred: 0
>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>   [   48.732290] brcmfmac: brcmf_detach Enter
>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
> 
> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>   loading brcmfmac
>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>   [   53.796829] mmc0:     4 bytes transferred: 0
>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
> 
> if you need more data: just ask ;-)
> 
Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
Could you please apply the following on top of 1, 2, 4, new one and send the log?
I hope the two debug messages bring me closer to the root cause of the issue.

Rgds, Heiner


diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 3b3ddf3e..d6d2d1a1 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 		for_each_sg(data->sg, sg, data->sg_count, i) {
 			unsigned int len = sg_dma_len(sg);
 
+			if (cmd->opcode == 53)
+				dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
+
 			if (data->blocks > 1)
 				len /= data->blksz;
 
@@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 
 	meson_mmc_read_resp(host->mmc, cmd);
 
+	if (cmd->opcode == 53)
+		dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
+
 	cmd->error = 0;
 	if (status & IRQ_RXD_ERR_MASK) {
 		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
-- 
2.12.0






> regards
> Helmut
> 

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 19.03.2017 16:35, Heiner Kallweit wrote:
> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>>
>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>>
>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>
>>>>>>>> But:
>>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>>
>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>>
>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>> The board I test on supports block devices only.
>>>>>>>
>>>>>>> Could you please share few more details:
>>>>>>> - Drivers involved
>>>>>>> - All syslog messages related to the device / driver
>>>>>>>
>>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>>> Others might find your feedback helpful too.
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>>
>>>>>>>> regards
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>>
>>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>>
>>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>
>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>
>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>>
>>>>>>
>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>>
>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>>
>>>>>> this is the output after adding patch 3
>>>>>>
>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>>
>>>>>> and this is the output after adding patches 4 & 5
>>>>>>
>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>>
>>>>>> regards
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Thanks a lot for the additional information. The first version of the patch
>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>
>>>>> Before submitting a new version of the patch set:
>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>>> following one and re-test?
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> ---
>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 6bfd3da9..ca685902 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -121,6 +121,13 @@
>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>
>>>>> +struct sd_emmc_desc {
>>>>> +    u32 cmd_cfg;
>>>>> +    u32 cmd_arg;
>>>>> +    u32 cmd_data;
>>>>> +    u32 cmd_resp;
>>>>> +};
>>>>> +
>>>>>  struct meson_host {
>>>>>      struct    device        *dev;
>>>>>      struct    mmc_host    *mmc;
>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>      struct clk_divider cfg_div;
>>>>>      struct clk *cfg_div_clk;
>>>>>
>>>>> -    unsigned int bounce_buf_size;
>>>>> -    void *bounce_buf;
>>>>> -    dma_addr_t bounce_dma_addr;
>>>>> +    struct sd_emmc_desc *descs;
>>>>> +    dma_addr_t descs_dma_addr;
>>>>>
>>>>>      bool vqmmc_enabled;
>>>>>  };
>>>>>
>>>>> -struct sd_emmc_desc {
>>>>> -    u32 cmd_cfg;
>>>>> -    u32 cmd_arg;
>>>>> -    u32 cmd_data;
>>>>> -    u32 cmd_resp;
>>>>> -};
>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>          return NULL;
>>>>>  }
>>>>>
>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>> +{
>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>>> +}
>>>>> +
>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>> +{
>>>>> +    struct mmc_data *data = mrq->data;
>>>>> +
>>>>> +    if (!data)
>>>>> +        return;
>>>>> +
>>>>> +    data->host_cookie = true;
>>>>> +
>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>> +                    meson_mmc_get_data_dir(data));
>>>>> +    if (!data->sg_count)
>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>> +}
>>>>> +
>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>> +                   int err)
>>>>> +{
>>>>> +    struct mmc_data *data = mrq->data;
>>>>> +
>>>>> +    if (data && data->sg_count)
>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>> +                 meson_mmc_get_data_dir(data));
>>>>> +}
>>>>> +
>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>>  {
>>>>>      struct mmc_host *mmc = host->mmc;
>>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>  {
>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>> -    u32 cfg;
>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>> -    unsigned int xfer_bytes = 0;
>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>> +    struct mmc_data *data = cmd->data;
>>>>> +    struct scatterlist *sg;
>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>> +    u8 blk_len;
>>>>> +    int i;
>>>>>
>>>>> -    /* Setup descriptors */
>>>>>      dma_rmb();
>>>>> -    desc = &desc_tmp;
>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>
>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>> -    desc->cmd_arg = cmd->arg;
>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>
>>>>>      /* Response */
>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>> -        desc->cmd_resp = 0;
>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>
>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>
>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>      } else {
>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>      }
>>>>>
>>>>> -    /* data? */
>>>>> -    if (cmd->data) {
>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>> -        if (cmd->data->blocks > 1) {
>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>> -            desc->cmd_cfg |=
>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>> +    if (data) {
>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>> +
>>>>> +        if (data->blocks > 1) {
>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>
>>>>>              /* check if block-size matches, if not update */
>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>>> -                    __func__, blk_len,
>>>>> -                    ilog2(cmd->data->blksz));
>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>> +                dev_dbg(host->dev,
>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>> +                blk_len = ilog2(data->blksz);
>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>              }
>>>>> -        } else {
>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>> -            desc->cmd_cfg |=
>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>          }
>>>>>
>>>>> -        cmd->data->bytes_xfered = 0;
>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>> -            dma_wmb();
>>>>> -        } else {
>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>> -        }
>>>>> +        data->bytes_xfered = 0;
>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>
>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>> +
>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>> +
>>>>> +            if (data->blocks > 1)
>>>>> +                len /= data->blksz;
>>>>> +
>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>> +            if (i > 0)
>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>> +            desc[i].cmd_resp = 0;
>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>> +        }
>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>
>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>      } else {
>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>> +        desc[0].cmd_resp = 0;
>>>>> +        desc[0].cmd_data = 0;
>>>>>      }
>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>
>>>>>      host->cmd = cmd;
>>>>>
>>>>> -    /* Last descriptor */
>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>  }
>>>>>
>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>  {
>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>>> +
>>>>> +    if (needs_pre_post_req)
>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>
>>>>>      /* Stop execution */
>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>      else
>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>> +
>>>>> +    if (needs_pre_post_req)
>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>  }
>>>>>
>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>  {
>>>>>      struct meson_host *host = dev_id;
>>>>>      struct mmc_command *cmd;
>>>>> +    struct mmc_data *data;
>>>>>      u32 irq_en, status, raw_status;
>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>
>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>      if (WARN_ON(!cmd))
>>>>>          return IRQ_NONE;
>>>>>
>>>>> +    data = cmd->data;
>>>>> +
>>>>>      spin_lock(&host->lock);
>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>          cmd->error = -ETIMEDOUT;
>>>>>      }
>>>>> +
>>>>> +    if (data && !cmd->error)
>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>> +
>>>>>      if (status & IRQ_SDIO)
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>
>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>> -    else  {
>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>> +    } else  {
>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>               status, cmd->opcode, cmd->arg,
>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>  {
>>>>>      struct meson_host *host = dev_id;
>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>> -    struct mmc_data *data;
>>>>> -    unsigned int xfer_bytes;
>>>>>
>>>>>      if (WARN_ON(!cmd))
>>>>>          return IRQ_NONE;
>>>>>
>>>>> -    data = cmd->data;
>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>> -    }
>>>>> -
>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>> -    if (next_cmd)
>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>> -    else
>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>
>>>>>      return IRQ_HANDLED;
>>>>>  }
>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>>      .request    = meson_mmc_request,
>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>  };
>>>>>
>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>>
>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>> -
>>>>> -    /* data bounce buffer */
>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>> -    host->bounce_buf =
>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>> -    if (host->bounce_buf == NULL) {
>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>> +
>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>> +    if (!host->descs) {
>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>>          ret = -ENOMEM;
>>>>>          goto err_div_clk;
>>>>>      }
>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>>      /* disable interrupts */
>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>
>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>> +              host->descs_dma_addr);
>>>>>
>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>
>>>>
>>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>
>>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>>
>>> After patches 1, 2, 4 the system is still working normally?
>>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>
>>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>>> or just specific ones fail.
>>>
>>> Thanks, Heiner
>>>
>>>> regards
>>>> Helmut
>>>>
>>>
>>>
>>
>> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
>> For the test i also changed meson-gx-mmc from built-in to module.
>> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
>>
>> Without your new patch the wifi adapter works normally.
>>
>> The debug info was produced with following commad sequence
>>  dmesg -n 8
>>  dmesg -D
>>  logger "loading meson-gx-mmc...."
>>  modprobe meson-gx-mmc
>>  sleep 1
>>  logger "loading brcmfmac"
>>  modprobe brcmfmac
>>  logger "modules loaded"
>>  sleep 1
>>  cp /var/log/syslog ~/syslog
>>  cp /proc/interrupts ~/interrupts
>>
>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>
>> because of the length of the files i removed most lines of the loading of meson-gx-mmc
>>
>> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>>  Only the timings differed with the applied patches
>>
>> the is the log for applied patches 1, 2, 4 & the new one
>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>   loading brcmfmac
>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>
>> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>   loading brcmfmac
>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>
>> if you need more data: just ask ;-)
>>
> Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
> Could you please apply the following on top of 1, 2, 4, new one and send the log?
> I hope the two debug messages bring me closer to the root cause of the issue.
>
> Rgds, Heiner
>
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index 3b3ddf3e..d6d2d1a1 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  		for_each_sg(data->sg, sg, data->sg_count, i) {
>  			unsigned int len = sg_dma_len(sg);
>
> +			if (cmd->opcode == 53)
> +				dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
> +
>  			if (data->blocks > 1)
>  				len /= data->blksz;
>
> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>
>  	meson_mmc_read_resp(host->mmc, cmd);
>
> +	if (cmd->opcode == 53)
> +		dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
> +
>  	cmd->error = 0;
>  	if (status & IRQ_RXD_ERR_MASK) {
>  		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>

here is the output:
[  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
[  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
[  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
[  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
[  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
[  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
[  107.510541] mmc0:     4 bytes transferred: 0
[  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 19.03.2017 16:35, Heiner Kallweit wrote:
> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>>
>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>>
>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>
>>>>>>>> But:
>>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>>
>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>>
>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>> The board I test on supports block devices only.
>>>>>>>
>>>>>>> Could you please share few more details:
>>>>>>> - Drivers involved
>>>>>>> - All syslog messages related to the device / driver
>>>>>>>
>>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>>> Others might find your feedback helpful too.
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>>
>>>>>>>> regards
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>>
>>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>>
>>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>
>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>
>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>>
>>>>>>
>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>>
>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>>
>>>>>> this is the output after adding patch 3
>>>>>>
>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>>
>>>>>> and this is the output after adding patches 4 & 5
>>>>>>
>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>>
>>>>>> regards
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Thanks a lot for the additional information. The first version of the patch
>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>
>>>>> Before submitting a new version of the patch set:
>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>>> following one and re-test?
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> ---
>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 6bfd3da9..ca685902 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -121,6 +121,13 @@
>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>
>>>>> +struct sd_emmc_desc {
>>>>> +    u32 cmd_cfg;
>>>>> +    u32 cmd_arg;
>>>>> +    u32 cmd_data;
>>>>> +    u32 cmd_resp;
>>>>> +};
>>>>> +
>>>>>  struct meson_host {
>>>>>      struct    device        *dev;
>>>>>      struct    mmc_host    *mmc;
>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>      struct clk_divider cfg_div;
>>>>>      struct clk *cfg_div_clk;
>>>>>
>>>>> -    unsigned int bounce_buf_size;
>>>>> -    void *bounce_buf;
>>>>> -    dma_addr_t bounce_dma_addr;
>>>>> +    struct sd_emmc_desc *descs;
>>>>> +    dma_addr_t descs_dma_addr;
>>>>>
>>>>>      bool vqmmc_enabled;
>>>>>  };
>>>>>
>>>>> -struct sd_emmc_desc {
>>>>> -    u32 cmd_cfg;
>>>>> -    u32 cmd_arg;
>>>>> -    u32 cmd_data;
>>>>> -    u32 cmd_resp;
>>>>> -};
>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>          return NULL;
>>>>>  }
>>>>>
>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>> +{
>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>>> +}
>>>>> +
>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>> +{
>>>>> +    struct mmc_data *data = mrq->data;
>>>>> +
>>>>> +    if (!data)
>>>>> +        return;
>>>>> +
>>>>> +    data->host_cookie = true;
>>>>> +
>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>> +                    meson_mmc_get_data_dir(data));
>>>>> +    if (!data->sg_count)
>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>> +}
>>>>> +
>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>> +                   int err)
>>>>> +{
>>>>> +    struct mmc_data *data = mrq->data;
>>>>> +
>>>>> +    if (data && data->sg_count)
>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>> +                 meson_mmc_get_data_dir(data));
>>>>> +}
>>>>> +
>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>>  {
>>>>>      struct mmc_host *mmc = host->mmc;
>>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>  {
>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>> -    u32 cfg;
>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>> -    unsigned int xfer_bytes = 0;
>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>> +    struct mmc_data *data = cmd->data;
>>>>> +    struct scatterlist *sg;
>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>> +    u8 blk_len;
>>>>> +    int i;
>>>>>
>>>>> -    /* Setup descriptors */
>>>>>      dma_rmb();
>>>>> -    desc = &desc_tmp;
>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>
>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>> -    desc->cmd_arg = cmd->arg;
>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>
>>>>>      /* Response */
>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>> -        desc->cmd_resp = 0;
>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>
>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>
>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>      } else {
>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>      }
>>>>>
>>>>> -    /* data? */
>>>>> -    if (cmd->data) {
>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>> -        if (cmd->data->blocks > 1) {
>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>> -            desc->cmd_cfg |=
>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>> +    if (data) {
>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>> +
>>>>> +        if (data->blocks > 1) {
>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>
>>>>>              /* check if block-size matches, if not update */
>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>>> -                    __func__, blk_len,
>>>>> -                    ilog2(cmd->data->blksz));
>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>> +                dev_dbg(host->dev,
>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>> +                blk_len = ilog2(data->blksz);
>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>              }
>>>>> -        } else {
>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>> -            desc->cmd_cfg |=
>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>          }
>>>>>
>>>>> -        cmd->data->bytes_xfered = 0;
>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>> -            dma_wmb();
>>>>> -        } else {
>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>> -        }
>>>>> +        data->bytes_xfered = 0;
>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>
>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>> +
>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>> +
>>>>> +            if (data->blocks > 1)
>>>>> +                len /= data->blksz;
>>>>> +
>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>> +            if (i > 0)
>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>> +            desc[i].cmd_resp = 0;
>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>> +        }
>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>
>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>      } else {
>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>> +        desc[0].cmd_resp = 0;
>>>>> +        desc[0].cmd_data = 0;
>>>>>      }
>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>
>>>>>      host->cmd = cmd;
>>>>>
>>>>> -    /* Last descriptor */
>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>  }
>>>>>
>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>  {
>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>>> +
>>>>> +    if (needs_pre_post_req)
>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>
>>>>>      /* Stop execution */
>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>      else
>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>> +
>>>>> +    if (needs_pre_post_req)
>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>  }
>>>>>
>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>  {
>>>>>      struct meson_host *host = dev_id;
>>>>>      struct mmc_command *cmd;
>>>>> +    struct mmc_data *data;
>>>>>      u32 irq_en, status, raw_status;
>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>
>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>      if (WARN_ON(!cmd))
>>>>>          return IRQ_NONE;
>>>>>
>>>>> +    data = cmd->data;
>>>>> +
>>>>>      spin_lock(&host->lock);
>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>          cmd->error = -ETIMEDOUT;
>>>>>      }
>>>>> +
>>>>> +    if (data && !cmd->error)
>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>> +
>>>>>      if (status & IRQ_SDIO)
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>
>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>> -    else  {
>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>> +    } else  {
>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>               status, cmd->opcode, cmd->arg,
>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>  {
>>>>>      struct meson_host *host = dev_id;
>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>> -    struct mmc_data *data;
>>>>> -    unsigned int xfer_bytes;
>>>>>
>>>>>      if (WARN_ON(!cmd))
>>>>>          return IRQ_NONE;
>>>>>
>>>>> -    data = cmd->data;
>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>> -    }
>>>>> -
>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>> -    if (next_cmd)
>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>> -    else
>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>
>>>>>      return IRQ_HANDLED;
>>>>>  }
>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>>      .request    = meson_mmc_request,
>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>  };
>>>>>
>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>>
>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>> -
>>>>> -    /* data bounce buffer */
>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>> -    host->bounce_buf =
>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>> -    if (host->bounce_buf == NULL) {
>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>> +
>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>> +    if (!host->descs) {
>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>>          ret = -ENOMEM;
>>>>>          goto err_div_clk;
>>>>>      }
>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>>      /* disable interrupts */
>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>
>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>> +              host->descs_dma_addr);
>>>>>
>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>
>>>>
>>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>
>>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>>
>>> After patches 1, 2, 4 the system is still working normally?
>>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>
>>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>>> or just specific ones fail.
>>>
>>> Thanks, Heiner
>>>
>>>> regards
>>>> Helmut
>>>>
>>>
>>>
>>
>> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
>> For the test i also changed meson-gx-mmc from built-in to module.
>> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
>>
>> Without your new patch the wifi adapter works normally.
>>
>> The debug info was produced with following commad sequence
>>  dmesg -n 8
>>  dmesg -D
>>  logger "loading meson-gx-mmc...."
>>  modprobe meson-gx-mmc
>>  sleep 1
>>  logger "loading brcmfmac"
>>  modprobe brcmfmac
>>  logger "modules loaded"
>>  sleep 1
>>  cp /var/log/syslog ~/syslog
>>  cp /proc/interrupts ~/interrupts
>>
>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>
>> because of the length of the files i removed most lines of the loading of meson-gx-mmc
>>
>> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>>  Only the timings differed with the applied patches
>>
>> the is the log for applied patches 1, 2, 4 & the new one
>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>   loading brcmfmac
>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>
>> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>   loading brcmfmac
>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>
>> if you need more data: just ask ;-)
>>
> Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
> Could you please apply the following on top of 1, 2, 4, new one and send the log?
> I hope the two debug messages bring me closer to the root cause of the issue.
>
> Rgds, Heiner
>
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index 3b3ddf3e..d6d2d1a1 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  		for_each_sg(data->sg, sg, data->sg_count, i) {
>  			unsigned int len = sg_dma_len(sg);
>
> +			if (cmd->opcode == 53)
> +				dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
> +
>  			if (data->blocks > 1)
>  				len /= data->blksz;
>
> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>
>  	meson_mmc_read_resp(host->mmc, cmd);
>
> +	if (cmd->opcode == 53)
> +		dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
> +
>  	cmd->error = 0;
>  	if (status & IRQ_RXD_ERR_MASK) {
>  		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>

here is the output:
[  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
[  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
[  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
[  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
[  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
[  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
[  107.510541] mmc0:     4 bytes transferred: 0
[  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000

Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 19.03.2017 um 21:46 schrieb Helmut Klein:
> On 19.03.2017 16:35, Heiner Kallweit wrote:
>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>>>
>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>>>
>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>
>>>>>>>>> But:
>>>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>>>
>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>>>
>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>> The board I test on supports block devices only.
>>>>>>>>
>>>>>>>> Could you please share few more details:
>>>>>>>> - Drivers involved
>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>
>>>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>>>
>>>>>>>>> regards
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>>>
>>>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>>>
>>>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>
>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>
>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>>>
>>>>>>>
>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>>>
>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>>>
>>>>>>> this is the output after adding patch 3
>>>>>>>
>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>>>
>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>
>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>>>
>>>>>>> regards
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>> Thanks a lot for the additional information. The first version of the patch
>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>
>>>>>> Before submitting a new version of the patch set:
>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>>>> following one and re-test?
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>> ---
>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index 6bfd3da9..ca685902 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -121,6 +121,13 @@
>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>
>>>>>> +struct sd_emmc_desc {
>>>>>> +    u32 cmd_cfg;
>>>>>> +    u32 cmd_arg;
>>>>>> +    u32 cmd_data;
>>>>>> +    u32 cmd_resp;
>>>>>> +};
>>>>>> +
>>>>>>  struct meson_host {
>>>>>>      struct    device        *dev;
>>>>>>      struct    mmc_host    *mmc;
>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>      struct clk_divider cfg_div;
>>>>>>      struct clk *cfg_div_clk;
>>>>>>
>>>>>> -    unsigned int bounce_buf_size;
>>>>>> -    void *bounce_buf;
>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>> +    struct sd_emmc_desc *descs;
>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>
>>>>>>      bool vqmmc_enabled;
>>>>>>  };
>>>>>>
>>>>>> -struct sd_emmc_desc {
>>>>>> -    u32 cmd_cfg;
>>>>>> -    u32 cmd_arg;
>>>>>> -    u32 cmd_data;
>>>>>> -    u32 cmd_resp;
>>>>>> -};
>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>          return NULL;
>>>>>>  }
>>>>>>
>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>>> +{
>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>>>> +}
>>>>>> +
>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>> +{
>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>> +
>>>>>> +    if (!data)
>>>>>> +        return;
>>>>>> +
>>>>>> +    data->host_cookie = true;
>>>>>> +
>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>> +    if (!data->sg_count)
>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>> +}
>>>>>> +
>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>>> +                   int err)
>>>>>> +{
>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>> +
>>>>>> +    if (data && data->sg_count)
>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>> +}
>>>>>> +
>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>>>  {
>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>>  {
>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>> -    u32 cfg;
>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>> +    struct scatterlist *sg;
>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>> +    u8 blk_len;
>>>>>> +    int i;
>>>>>>
>>>>>> -    /* Setup descriptors */
>>>>>>      dma_rmb();
>>>>>> -    desc = &desc_tmp;
>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>
>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>
>>>>>>      /* Response */
>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>> -        desc->cmd_resp = 0;
>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>
>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>
>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>      } else {
>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>      }
>>>>>>
>>>>>> -    /* data? */
>>>>>> -    if (cmd->data) {
>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>> -            desc->cmd_cfg |=
>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>> +    if (data) {
>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>> +
>>>>>> +        if (data->blocks > 1) {
>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>
>>>>>>              /* check if block-size matches, if not update */
>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>>>> -                    __func__, blk_len,
>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>> +                dev_dbg(host->dev,
>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>              }
>>>>>> -        } else {
>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>> -            desc->cmd_cfg |=
>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>          }
>>>>>>
>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>> -            dma_wmb();
>>>>>> -        } else {
>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>> -        }
>>>>>> +        data->bytes_xfered = 0;
>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>
>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>> +
>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>> +
>>>>>> +            if (data->blocks > 1)
>>>>>> +                len /= data->blksz;
>>>>>> +
>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>> +            if (i > 0)
>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>> +            desc[i].cmd_resp = 0;
>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>> +        }
>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>
>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>      } else {
>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>> +        desc[0].cmd_resp = 0;
>>>>>> +        desc[0].cmd_data = 0;
>>>>>>      }
>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>
>>>>>>      host->cmd = cmd;
>>>>>>
>>>>>> -    /* Last descriptor */
>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>  }
>>>>>>
>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>  {
>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>>>> +
>>>>>> +    if (needs_pre_post_req)
>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>
>>>>>>      /* Stop execution */
>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>      else
>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>> +
>>>>>> +    if (needs_pre_post_req)
>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>  }
>>>>>>
>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>  {
>>>>>>      struct meson_host *host = dev_id;
>>>>>>      struct mmc_command *cmd;
>>>>>> +    struct mmc_data *data;
>>>>>>      u32 irq_en, status, raw_status;
>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>
>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>      if (WARN_ON(!cmd))
>>>>>>          return IRQ_NONE;
>>>>>>
>>>>>> +    data = cmd->data;
>>>>>> +
>>>>>>      spin_lock(&host->lock);
>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>      }
>>>>>> +
>>>>>> +    if (data && !cmd->error)
>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>> +
>>>>>>      if (status & IRQ_SDIO)
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>
>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>> -    else  {
>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>> +    } else  {
>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>  {
>>>>>>      struct meson_host *host = dev_id;
>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>> -    struct mmc_data *data;
>>>>>> -    unsigned int xfer_bytes;
>>>>>>
>>>>>>      if (WARN_ON(!cmd))
>>>>>>          return IRQ_NONE;
>>>>>>
>>>>>> -    data = cmd->data;
>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>> -    }
>>>>>> -
>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>> -    if (next_cmd)
>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>> -    else
>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>
>>>>>>      return IRQ_HANDLED;
>>>>>>  }
>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>>>      .request    = meson_mmc_request,
>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>  };
>>>>>>
>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>
>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>> -
>>>>>> -    /* data bounce buffer */
>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>> -    host->bounce_buf =
>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>> +
>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>> +    if (!host->descs) {
>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>>>          ret = -ENOMEM;
>>>>>>          goto err_div_clk;
>>>>>>      }
>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>>>      /* disable interrupts */
>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>
>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>> +              host->descs_dma_addr);
>>>>>>
>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>
>>>>>
>>>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>
>>>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>>>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>>>
>>>> After patches 1, 2, 4 the system is still working normally?
>>>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>
>>>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>>>> or just specific ones fail.
>>>>
>>>> Thanks, Heiner
>>>>
>>>>> regards
>>>>> Helmut
>>>>>
>>>>
>>>>
>>>
>>> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
>>> For the test i also changed meson-gx-mmc from built-in to module.
>>> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
>>>
>>> Without your new patch the wifi adapter works normally.
>>>
>>> The debug info was produced with following commad sequence
>>>  dmesg -n 8
>>>  dmesg -D
>>>  logger "loading meson-gx-mmc...."
>>>  modprobe meson-gx-mmc
>>>  sleep 1
>>>  logger "loading brcmfmac"
>>>  modprobe brcmfmac
>>>  logger "modules loaded"
>>>  sleep 1
>>>  cp /var/log/syslog ~/syslog
>>>  cp /proc/interrupts ~/interrupts
>>>
>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>
>>> because of the length of the files i removed most lines of the loading of meson-gx-mmc
>>>
>>> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>>>  Only the timings differed with the applied patches
>>>
>>> the is the log for applied patches 1, 2, 4 & the new one
>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>   loading brcmfmac
>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>
>>> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>   loading brcmfmac
>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>
>>> if you need more data: just ask ;-)
>>>
>> Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
>> Could you please apply the following on top of 1, 2, 4, new one and send the log?
>> I hope the two debug messages bring me closer to the root cause of the issue.
>>
>> Rgds, Heiner
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 3b3ddf3e..d6d2d1a1 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>              unsigned int len = sg_dma_len(sg);
>>
>> +            if (cmd->opcode == 53)
>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
>> +
>>              if (data->blocks > 1)
>>                  len /= data->blksz;
>>
>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>
>>      meson_mmc_read_resp(host->mmc, cmd);
>>
>> +    if (cmd->opcode == 53)
>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
>> +
>>      cmd->error = 0;
>>      if (status & IRQ_RXD_ERR_MASK) {
>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>
> 
> here is the output:
> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [  107.510541] mmc0:     4 bytes transferred: 0
> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
> 
> Helmut
> 
> 
Weird .. Everything looks ok so far. I don't see a reason why this small read DMA returns
zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.

OK, one last attempt before I have to think about a better way to tackle this issue.

Could you please replace the last logging extension patch with this one?
(I just added a memory barrier to be sure to read the actual value.)

Thanks, Heiner


diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index ca685902..5b511944 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 		for_each_sg(data->sg, sg, data->sg_count, i) {
 			unsigned int len = sg_dma_len(sg);
 
+			if (cmd->opcode == 53)
+				pr_info("sg: idx %d len %u\n", i, len);
+
 			if (data->blocks > 1)
 				len /= data->blksz;
 
@@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 
 	meson_mmc_read_resp(host->mmc, cmd);
 
+	if (cmd->opcode == 53) {
+		dma_rmb();
+		pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
+	}
+
 	cmd->error = 0;
 	if (status & IRQ_RXD_ERR_MASK) {
 		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
-- 
2.12.0

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 19.03.2017 um 21:46 schrieb Helmut Klein:
> On 19.03.2017 16:35, Heiner Kallweit wrote:
>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>>>
>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>>>
>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>
>>>>>>>>> But:
>>>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>>>
>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>>>
>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>> The board I test on supports block devices only.
>>>>>>>>
>>>>>>>> Could you please share few more details:
>>>>>>>> - Drivers involved
>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>
>>>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>>>
>>>>>>>>> regards
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>>>
>>>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>>>
>>>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>
>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>
>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>>>
>>>>>>>
>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>>>
>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>>>
>>>>>>> this is the output after adding patch 3
>>>>>>>
>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>>>
>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>
>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>>>
>>>>>>> regards
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>> Thanks a lot for the additional information. The first version of the patch
>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>
>>>>>> Before submitting a new version of the patch set:
>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>>>> following one and re-test?
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>> ---
>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index 6bfd3da9..ca685902 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -121,6 +121,13 @@
>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>
>>>>>> +struct sd_emmc_desc {
>>>>>> +    u32 cmd_cfg;
>>>>>> +    u32 cmd_arg;
>>>>>> +    u32 cmd_data;
>>>>>> +    u32 cmd_resp;
>>>>>> +};
>>>>>> +
>>>>>>  struct meson_host {
>>>>>>      struct    device        *dev;
>>>>>>      struct    mmc_host    *mmc;
>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>      struct clk_divider cfg_div;
>>>>>>      struct clk *cfg_div_clk;
>>>>>>
>>>>>> -    unsigned int bounce_buf_size;
>>>>>> -    void *bounce_buf;
>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>> +    struct sd_emmc_desc *descs;
>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>
>>>>>>      bool vqmmc_enabled;
>>>>>>  };
>>>>>>
>>>>>> -struct sd_emmc_desc {
>>>>>> -    u32 cmd_cfg;
>>>>>> -    u32 cmd_arg;
>>>>>> -    u32 cmd_data;
>>>>>> -    u32 cmd_resp;
>>>>>> -};
>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>          return NULL;
>>>>>>  }
>>>>>>
>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>>> +{
>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>>>> +}
>>>>>> +
>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>> +{
>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>> +
>>>>>> +    if (!data)
>>>>>> +        return;
>>>>>> +
>>>>>> +    data->host_cookie = true;
>>>>>> +
>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>> +    if (!data->sg_count)
>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>> +}
>>>>>> +
>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>>> +                   int err)
>>>>>> +{
>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>> +
>>>>>> +    if (data && data->sg_count)
>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>> +}
>>>>>> +
>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>>>  {
>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>>  {
>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>> -    u32 cfg;
>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>> +    struct scatterlist *sg;
>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>> +    u8 blk_len;
>>>>>> +    int i;
>>>>>>
>>>>>> -    /* Setup descriptors */
>>>>>>      dma_rmb();
>>>>>> -    desc = &desc_tmp;
>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>
>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>
>>>>>>      /* Response */
>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>> -        desc->cmd_resp = 0;
>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>
>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>
>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>      } else {
>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>      }
>>>>>>
>>>>>> -    /* data? */
>>>>>> -    if (cmd->data) {
>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>> -            desc->cmd_cfg |=
>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>> +    if (data) {
>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>> +
>>>>>> +        if (data->blocks > 1) {
>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>
>>>>>>              /* check if block-size matches, if not update */
>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>>>> -                    __func__, blk_len,
>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>> +                dev_dbg(host->dev,
>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>              }
>>>>>> -        } else {
>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>> -            desc->cmd_cfg |=
>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>          }
>>>>>>
>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>> -            dma_wmb();
>>>>>> -        } else {
>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>> -        }
>>>>>> +        data->bytes_xfered = 0;
>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>
>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>> +
>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>> +
>>>>>> +            if (data->blocks > 1)
>>>>>> +                len /= data->blksz;
>>>>>> +
>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>> +            if (i > 0)
>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>> +            desc[i].cmd_resp = 0;
>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>> +        }
>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>
>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>      } else {
>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>> +        desc[0].cmd_resp = 0;
>>>>>> +        desc[0].cmd_data = 0;
>>>>>>      }
>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>
>>>>>>      host->cmd = cmd;
>>>>>>
>>>>>> -    /* Last descriptor */
>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>  }
>>>>>>
>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>  {
>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>>>> +
>>>>>> +    if (needs_pre_post_req)
>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>
>>>>>>      /* Stop execution */
>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>      else
>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>> +
>>>>>> +    if (needs_pre_post_req)
>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>  }
>>>>>>
>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>  {
>>>>>>      struct meson_host *host = dev_id;
>>>>>>      struct mmc_command *cmd;
>>>>>> +    struct mmc_data *data;
>>>>>>      u32 irq_en, status, raw_status;
>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>
>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>      if (WARN_ON(!cmd))
>>>>>>          return IRQ_NONE;
>>>>>>
>>>>>> +    data = cmd->data;
>>>>>> +
>>>>>>      spin_lock(&host->lock);
>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>      }
>>>>>> +
>>>>>> +    if (data && !cmd->error)
>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>> +
>>>>>>      if (status & IRQ_SDIO)
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>
>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>> -    else  {
>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>> +    } else  {
>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>  {
>>>>>>      struct meson_host *host = dev_id;
>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>> -    struct mmc_data *data;
>>>>>> -    unsigned int xfer_bytes;
>>>>>>
>>>>>>      if (WARN_ON(!cmd))
>>>>>>          return IRQ_NONE;
>>>>>>
>>>>>> -    data = cmd->data;
>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>> -    }
>>>>>> -
>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>> -    if (next_cmd)
>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>> -    else
>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>
>>>>>>      return IRQ_HANDLED;
>>>>>>  }
>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>>>      .request    = meson_mmc_request,
>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>  };
>>>>>>
>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>
>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>> -
>>>>>> -    /* data bounce buffer */
>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>> -    host->bounce_buf =
>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>> +
>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>> +    if (!host->descs) {
>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>>>          ret = -ENOMEM;
>>>>>>          goto err_div_clk;
>>>>>>      }
>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>>>      /* disable interrupts */
>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>
>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>> +              host->descs_dma_addr);
>>>>>>
>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>
>>>>>
>>>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>
>>>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>>>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>>>
>>>> After patches 1, 2, 4 the system is still working normally?
>>>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>
>>>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>>>> or just specific ones fail.
>>>>
>>>> Thanks, Heiner
>>>>
>>>>> regards
>>>>> Helmut
>>>>>
>>>>
>>>>
>>>
>>> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
>>> For the test i also changed meson-gx-mmc from built-in to module.
>>> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
>>>
>>> Without your new patch the wifi adapter works normally.
>>>
>>> The debug info was produced with following commad sequence
>>>  dmesg -n 8
>>>  dmesg -D
>>>  logger "loading meson-gx-mmc...."
>>>  modprobe meson-gx-mmc
>>>  sleep 1
>>>  logger "loading brcmfmac"
>>>  modprobe brcmfmac
>>>  logger "modules loaded"
>>>  sleep 1
>>>  cp /var/log/syslog ~/syslog
>>>  cp /proc/interrupts ~/interrupts
>>>
>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>
>>> because of the length of the files i removed most lines of the loading of meson-gx-mmc
>>>
>>> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>>>  Only the timings differed with the applied patches
>>>
>>> the is the log for applied patches 1, 2, 4 & the new one
>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>   loading brcmfmac
>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>
>>> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>   loading brcmfmac
>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>
>>> if you need more data: just ask ;-)
>>>
>> Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
>> Could you please apply the following on top of 1, 2, 4, new one and send the log?
>> I hope the two debug messages bring me closer to the root cause of the issue.
>>
>> Rgds, Heiner
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 3b3ddf3e..d6d2d1a1 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>              unsigned int len = sg_dma_len(sg);
>>
>> +            if (cmd->opcode == 53)
>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
>> +
>>              if (data->blocks > 1)
>>                  len /= data->blksz;
>>
>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>
>>      meson_mmc_read_resp(host->mmc, cmd);
>>
>> +    if (cmd->opcode == 53)
>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
>> +
>>      cmd->error = 0;
>>      if (status & IRQ_RXD_ERR_MASK) {
>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>
> 
> here is the output:
> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [  107.510541] mmc0:     4 bytes transferred: 0
> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
> 
> Helmut
> 
> 
Weird .. Everything looks ok so far. I don't see a reason why this small read DMA returns
zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.

OK, one last attempt before I have to think about a better way to tackle this issue.

Could you please replace the last logging extension patch with this one?
(I just added a memory barrier to be sure to read the actual value.)

Thanks, Heiner


diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index ca685902..5b511944 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 		for_each_sg(data->sg, sg, data->sg_count, i) {
 			unsigned int len = sg_dma_len(sg);
 
+			if (cmd->opcode == 53)
+				pr_info("sg: idx %d len %u\n", i, len);
+
 			if (data->blocks > 1)
 				len /= data->blksz;
 
@@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 
 	meson_mmc_read_resp(host->mmc, cmd);
 
+	if (cmd->opcode == 53) {
+		dma_rmb();
+		pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
+	}
+
 	cmd->error = 0;
 	if (status & IRQ_RXD_ERR_MASK) {
 		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
-- 
2.12.0

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 19.03.2017 23:39, Heiner Kallweit wrote:
> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>
>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>>>>
>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>>>>
>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>
>>>>>>>>>> But:
>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>>>>
>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>>>>
>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>
>>>>>>>>> Could you please share few more details:
>>>>>>>>> - Drivers involved
>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>
>>>>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>>>>
>>>>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>>>>
>>>>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>
>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>
>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>>>>
>>>>>>>>
>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>>>>
>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>>>>
>>>>>>>> this is the output after adding patch 3
>>>>>>>>
>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>>>>
>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>
>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>>>>
>>>>>>>> regards
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Thanks a lot for the additional information. The first version of the patch
>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>
>>>>>>> Before submitting a new version of the patch set:
>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>>>>> following one and re-test?
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>> ---
>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>
>>>>>>> +struct sd_emmc_desc {
>>>>>>> +    u32 cmd_cfg;
>>>>>>> +    u32 cmd_arg;
>>>>>>> +    u32 cmd_data;
>>>>>>> +    u32 cmd_resp;
>>>>>>> +};
>>>>>>> +
>>>>>>>  struct meson_host {
>>>>>>>      struct    device        *dev;
>>>>>>>      struct    mmc_host    *mmc;
>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>      struct clk_divider cfg_div;
>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>
>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>> -    void *bounce_buf;
>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>
>>>>>>>      bool vqmmc_enabled;
>>>>>>>  };
>>>>>>>
>>>>>>> -struct sd_emmc_desc {
>>>>>>> -    u32 cmd_cfg;
>>>>>>> -    u32 cmd_arg;
>>>>>>> -    u32 cmd_data;
>>>>>>> -    u32 cmd_resp;
>>>>>>> -};
>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>          return NULL;
>>>>>>>  }
>>>>>>>
>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>>>> +{
>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>>>>> +}
>>>>>>> +
>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>> +{
>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>> +
>>>>>>> +    if (!data)
>>>>>>> +        return;
>>>>>>> +
>>>>>>> +    data->host_cookie = true;
>>>>>>> +
>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>> +    if (!data->sg_count)
>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>> +}
>>>>>>> +
>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>>>> +                   int err)
>>>>>>> +{
>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>> +
>>>>>>> +    if (data && data->sg_count)
>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>> +}
>>>>>>> +
>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>>>>  {
>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>>>  {
>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>> -    u32 cfg;
>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>> +    struct scatterlist *sg;
>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>> +    u8 blk_len;
>>>>>>> +    int i;
>>>>>>>
>>>>>>> -    /* Setup descriptors */
>>>>>>>      dma_rmb();
>>>>>>> -    desc = &desc_tmp;
>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>
>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>
>>>>>>>      /* Response */
>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>> -        desc->cmd_resp = 0;
>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>
>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>
>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>      } else {
>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>      }
>>>>>>>
>>>>>>> -    /* data? */
>>>>>>> -    if (cmd->data) {
>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>> -            desc->cmd_cfg |=
>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>> +    if (data) {
>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>> +
>>>>>>> +        if (data->blocks > 1) {
>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>
>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>>>>> -                    __func__, blk_len,
>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>> +                dev_dbg(host->dev,
>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>              }
>>>>>>> -        } else {
>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>> -            desc->cmd_cfg |=
>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>          }
>>>>>>>
>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>> -            dma_wmb();
>>>>>>> -        } else {
>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>> -        }
>>>>>>> +        data->bytes_xfered = 0;
>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>
>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>> +
>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>> +
>>>>>>> +            if (data->blocks > 1)
>>>>>>> +                len /= data->blksz;
>>>>>>> +
>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>> +            if (i > 0)
>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>> +        }
>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>
>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>      } else {
>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>      }
>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>
>>>>>>>      host->cmd = cmd;
>>>>>>>
>>>>>>> -    /* Last descriptor */
>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>  }
>>>>>>>
>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>  {
>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>>>>> +
>>>>>>> +    if (needs_pre_post_req)
>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>
>>>>>>>      /* Stop execution */
>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>      else
>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>> +
>>>>>>> +    if (needs_pre_post_req)
>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>  }
>>>>>>>
>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>>  {
>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>      struct mmc_command *cmd;
>>>>>>> +    struct mmc_data *data;
>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>
>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>          return IRQ_NONE;
>>>>>>>
>>>>>>> +    data = cmd->data;
>>>>>>> +
>>>>>>>      spin_lock(&host->lock);
>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>      }
>>>>>>> +
>>>>>>> +    if (data && !cmd->error)
>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>> +
>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>
>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>> -    else  {
>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>> +    } else  {
>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>  {
>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>> -    struct mmc_data *data;
>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>
>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>          return IRQ_NONE;
>>>>>>>
>>>>>>> -    data = cmd->data;
>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>> -    }
>>>>>>> -
>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>> -    if (next_cmd)
>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>> -    else
>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>
>>>>>>>      return IRQ_HANDLED;
>>>>>>>  }
>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>>>>      .request    = meson_mmc_request,
>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>  };
>>>>>>>
>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>
>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>> -
>>>>>>> -    /* data bounce buffer */
>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>> -    host->bounce_buf =
>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>> +
>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>> +    if (!host->descs) {
>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>>>>          ret = -ENOMEM;
>>>>>>>          goto err_div_clk;
>>>>>>>      }
>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>>>>      /* disable interrupts */
>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>
>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>> +              host->descs_dma_addr);
>>>>>>>
>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>
>>>>>>
>>>>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>
>>>>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>>>>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>>>>
>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>
>>>>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>>>>> or just specific ones fail.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>> regards
>>>>>> Helmut
>>>>>>
>>>>>
>>>>>
>>>>
>>>> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
>>>>
>>>> Without your new patch the wifi adapter works normally.
>>>>
>>>> The debug info was produced with following commad sequence
>>>>  dmesg -n 8
>>>>  dmesg -D
>>>>  logger "loading meson-gx-mmc...."
>>>>  modprobe meson-gx-mmc
>>>>  sleep 1
>>>>  logger "loading brcmfmac"
>>>>  modprobe brcmfmac
>>>>  logger "modules loaded"
>>>>  sleep 1
>>>>  cp /var/log/syslog ~/syslog
>>>>  cp /proc/interrupts ~/interrupts
>>>>
>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>
>>>> because of the length of the files i removed most lines of the loading of meson-gx-mmc
>>>>
>>>> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>>>>  Only the timings differed with the applied patches
>>>>
>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>   loading brcmfmac
>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>
>>>> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>   loading brcmfmac
>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>
>>>> if you need more data: just ask ;-)
>>>>
>>> Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
>>> Could you please apply the following on top of 1, 2, 4, new one and send the log?
>>> I hope the two debug messages bring me closer to the root cause of the issue.
>>>
>>> Rgds, Heiner
>>>
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>> index 3b3ddf3e..d6d2d1a1 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>              unsigned int len = sg_dma_len(sg);
>>>
>>> +            if (cmd->opcode == 53)
>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
>>> +
>>>              if (data->blocks > 1)
>>>                  len /= data->blksz;
>>>
>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>
>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>
>>> +    if (cmd->opcode == 53)
>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
>>> +
>>>      cmd->error = 0;
>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>
>>
>> here is the output:
>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>> [  107.510541] mmc0:     4 bytes transferred: 0
>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>
>> Helmut
>>
>>
> Weird .. Everything looks ok so far. I don't see a reason why this small read DMA returns
> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>
> OK, one last attempt before I have to think about a better way to tackle this issue.
>
> Could you please replace the last logging extension patch with this one?
> (I just added a memory barrier to be sure to read the actual value.)
>
> Thanks, Heiner
>
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index ca685902..5b511944 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  		for_each_sg(data->sg, sg, data->sg_count, i) {
>  			unsigned int len = sg_dma_len(sg);
>
> +			if (cmd->opcode == 53)
> +				pr_info("sg: idx %d len %u\n", i, len);
> +
>  			if (data->blocks > 1)
>  				len /= data->blksz;
>
> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>
>  	meson_mmc_read_resp(host->mmc, cmd);
>
> +	if (cmd->opcode == 53) {
> +		dma_rmb();
> +		pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
> +	}
> +
>  	cmd->error = 0;
>  	if (status & IRQ_RXD_ERR_MASK) {
>  		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>

the output is not really different (for the 2 cmd53)
[   37.113577] sg: idx 0 len 4
[   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
[   37.114016] sg: idx 0 len 4
[   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 19.03.2017 23:39, Heiner Kallweit wrote:
> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>
>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of course the older set v5 1...10).
>>>>>>>>>>
>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx is much better now.
>>>>>>>>>>
>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>
>>>>>>>>>> But:
>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts with patch 3 and gets worse with patch 5.
>>>>>>>>>>
>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the s905. (=mmc1)
>>>>>>>>>>
>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>
>>>>>>>>> Could you please share few more details:
>>>>>>>>> - Drivers involved
>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>
>>>>>>>>> And please set the relevant mailing lists on cc when providing test feedback.
>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>> so i think it is important to test your patch set asap on an officially supported board with a wifi adapter).
>>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as a module and loaded via /etc/modules.
>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which are auto loaded.
>>>>>>>>
>>>>>>>> my user space is debian unstable. The kernel is cross compiled on my x86-64 laptop with gcc 5.4.1
>>>>>>>>
>>>>>>>> i use my own kernel configuration without an initial ramdisk. mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>
>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>
>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card reader).
>>>>>>>>
>>>>>>>>
>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only patches 1 & 2 are applied
>>>>>>>>
>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID 01-72f124c5
>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 184
>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 188
>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 192
>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 196
>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 200
>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 204
>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring unexpected firmware channel 208
>>>>>>>>
>>>>>>>> this is the output after adding patch 3
>>>>>>>>
>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer failed <<<=====
>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error -84 on writing 239507 membytes at 0x00000000
>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle image file download failed
>>>>>>>>
>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>
>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128 KiB <<<=====
>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not supported     <<<=====
>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>>>>>
>>>>>>>> regards
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Thanks a lot for the additional information. The first version of the patch
>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>
>>>>>>> Before submitting a new version of the patch set:
>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus the
>>>>>>> following one and re-test?
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>> ---
>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222 ++++++++++++++++++++++------------------
>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>
>>>>>>> +struct sd_emmc_desc {
>>>>>>> +    u32 cmd_cfg;
>>>>>>> +    u32 cmd_arg;
>>>>>>> +    u32 cmd_data;
>>>>>>> +    u32 cmd_resp;
>>>>>>> +};
>>>>>>> +
>>>>>>>  struct meson_host {
>>>>>>>      struct    device        *dev;
>>>>>>>      struct    mmc_host    *mmc;
>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>      struct clk_divider cfg_div;
>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>
>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>> -    void *bounce_buf;
>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>
>>>>>>>      bool vqmmc_enabled;
>>>>>>>  };
>>>>>>>
>>>>>>> -struct sd_emmc_desc {
>>>>>>> -    u32 cmd_cfg;
>>>>>>> -    u32 cmd_arg;
>>>>>>> -    u32 cmd_data;
>>>>>>> -    u32 cmd_resp;
>>>>>>> -};
>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>          return NULL;
>>>>>>>  }
>>>>>>>
>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>>>> +{
>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>>>>> +}
>>>>>>> +
>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>> +{
>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>> +
>>>>>>> +    if (!data)
>>>>>>> +        return;
>>>>>>> +
>>>>>>> +    data->host_cookie = true;
>>>>>>> +
>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>> +    if (!data->sg_count)
>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>> +}
>>>>>>> +
>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>>>> +                   int err)
>>>>>>> +{
>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>> +
>>>>>>> +    if (data && data->sg_count)
>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>> +}
>>>>>>> +
>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>>>>>  {
>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>> @@ -434,104 +464,102 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>>>  {
>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>> -    u32 cfg;
>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>> +    struct scatterlist *sg;
>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>> +    u8 blk_len;
>>>>>>> +    int i;
>>>>>>>
>>>>>>> -    /* Setup descriptors */
>>>>>>>      dma_rmb();
>>>>>>> -    desc = &desc_tmp;
>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>
>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>
>>>>>>>      /* Response */
>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>> -        desc->cmd_resp = 0;
>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>
>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>
>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>      } else {
>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>      }
>>>>>>>
>>>>>>> -    /* data? */
>>>>>>> -    if (cmd->data) {
>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>> -            desc->cmd_cfg |=
>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>> +    if (data) {
>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>> +
>>>>>>> +        if (data->blocks > 1) {
>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>
>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
>>>>>>> -                    __func__, blk_len,
>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>> +                dev_dbg(host->dev,
>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>              }
>>>>>>> -        } else {
>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>> -            desc->cmd_cfg |=
>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>          }
>>>>>>>
>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>> -            dma_wmb();
>>>>>>> -        } else {
>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>> -        }
>>>>>>> +        data->bytes_xfered = 0;
>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>
>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>> +
>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>> +
>>>>>>> +            if (data->blocks > 1)
>>>>>>> +                len /= data->blksz;
>>>>>>> +
>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>> +            if (i > 0)
>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>> +        }
>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>
>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>      } else {
>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) << CMD_CFG_TIMEOUT_SHIFT;
>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>      }
>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>
>>>>>>>      host->cmd = cmd;
>>>>>>>
>>>>>>> -    /* Last descriptor */
>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>  }
>>>>>>>
>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>  {
>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>> +    bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
>>>>>>> +
>>>>>>> +    if (needs_pre_post_req)
>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>
>>>>>>>      /* Stop execution */
>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>      else
>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>> +
>>>>>>> +    if (needs_pre_post_req)
>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>  }
>>>>>>>
>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>>  {
>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>      struct mmc_command *cmd;
>>>>>>> +    struct mmc_data *data;
>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>
>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>          return IRQ_NONE;
>>>>>>>
>>>>>>> +    data = cmd->data;
>>>>>>> +
>>>>>>>      spin_lock(&host->lock);
>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>      }
>>>>>>> +
>>>>>>> +    if (data && !cmd->error)
>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>> +
>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>
>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>> -    else  {
>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>> +    } else  {
>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>  {
>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>> -    struct mmc_data *data;
>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>
>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>          return IRQ_NONE;
>>>>>>>
>>>>>>> -    data = cmd->data;
>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>> -    }
>>>>>>> -
>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>> -    if (next_cmd)
>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>> -    else
>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>
>>>>>>>      return IRQ_HANDLED;
>>>>>>>  }
>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
>>>>>>>      .request    = meson_mmc_request,
>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>  };
>>>>>>>
>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>
>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>> -
>>>>>>> -    /* data bounce buffer */
>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>> -    host->bounce_buf =
>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>> +
>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>> +    if (!host->descs) {
>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
>>>>>>>          ret = -ENOMEM;
>>>>>>>          goto err_div_clk;
>>>>>>>      }
>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
>>>>>>>      /* disable interrupts */
>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>
>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>> +              host->descs_dma_addr);
>>>>>>>
>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>
>>>>>>
>>>>>> compared to the patches 1...5 there is absolutely no change to patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>
>>>>> Thanks for re-testing. I have a little bit of a hard time to understand why SD and eMMC mode
>>>>> are working but SDIO (at least with brcfmac) is not. Especially as I don't have HW to test SDIO mode on.
>>>>>
>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>> And would it be possible for you to compile a DEBUG kernel and post the mmc/brcmfmac related output?
>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>
>>>>> Last but not least, could you please post /proc/interrupts ? This would give an idea whether any SDIO
>>>>> or just specific ones fail.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>> regards
>>>>>> Helmut
>>>>>>
>>>>>
>>>>>
>>>>
>>>> i enabled the debug flags for mmc and brcmfmac in the kernel configuration.
>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>> This resulted in a different order of the mmc devices. The sdio/wifi is now mmc0 and not mmc1
>>>>
>>>> Without your new patch the wifi adapter works normally.
>>>>
>>>> The debug info was produced with following commad sequence
>>>>  dmesg -n 8
>>>>  dmesg -D
>>>>  logger "loading meson-gx-mmc...."
>>>>  modprobe meson-gx-mmc
>>>>  sleep 1
>>>>  logger "loading brcmfmac"
>>>>  modprobe brcmfmac
>>>>  logger "modules loaded"
>>>>  sleep 1
>>>>  cp /var/log/syslog ~/syslog
>>>>  cp /proc/interrupts ~/interrupts
>>>>
>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>
>>>> because of the length of the files i removed most lines of the loading of meson-gx-mmc
>>>>
>>>> unhandled interrupts: independent of the number of applied patches i've always got 11 of them.
>>>>  Only the timings differed with the applied patches
>>>>
>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response timeout
>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>   loading brcmfmac
>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data available.
>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl data:0x00000000             <<<<===== wrong!
>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x21
>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000 00000000 00000000
>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f, data:0x00
>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000f, nbytes=1
>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering oob=0 sd=0
>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe failed -19...
>>>>
>>>> this is the debug data for applied patches 1,2 & 4 (left only few lines after the first CMD53)
>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000 00000000 00000000
>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate 400000 -> 52000000
>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate 52000000 != actual rate 50000000
>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios: SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>   loading brcmfmac
>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data available.
>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling brcmf_sdiod_probe...
>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000 00000000 00000000
>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000 00000000 00000000
>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000a, nbytes=1
>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000b, nbytes=1
>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000c, nbytes=1
>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000 00000000 00000000
>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl data:0x16044330               <<<<<====== ok
>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000 00000000 00000000
>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x1000e, nbytes=1
>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000 00000000 00000000
>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e, data:0x28
>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1, addr=0x1000e, nbytes=1
>>>>
>>>> if you need more data: just ask ;-)
>>>>
>>> Thanks a lot for the logs. So the first read returns 0 instead of the actual register value.
>>> Could you please apply the following on top of 1, 2, 4, new one and send the log?
>>> I hope the two debug messages bring me closer to the root cause of the issue.
>>>
>>> Rgds, Heiner
>>>
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>> index 3b3ddf3e..d6d2d1a1 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>              unsigned int len = sg_dma_len(sg);
>>>
>>> +            if (cmd->opcode == 53)
>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i, len);
>>> +
>>>              if (data->blocks > 1)
>>>                  len /= data->blksz;
>>>
>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>>>
>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>
>>> +    if (cmd->opcode == 53)
>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",  host->descs[0].cmd_data);
>>> +
>>>      cmd->error = 0;
>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>
>>
>> here is the output:
>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>> [  107.510541] mmc0:     4 bytes transferred: 0
>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>
>> Helmut
>>
>>
> Weird .. Everything looks ok so far. I don't see a reason why this small read DMA returns
> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>
> OK, one last attempt before I have to think about a better way to tackle this issue.
>
> Could you please replace the last logging extension patch with this one?
> (I just added a memory barrier to be sure to read the actual value.)
>
> Thanks, Heiner
>
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index ca685902..5b511944 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  		for_each_sg(data->sg, sg, data->sg_count, i) {
>  			unsigned int len = sg_dma_len(sg);
>
> +			if (cmd->opcode == 53)
> +				pr_info("sg: idx %d len %u\n", i, len);
> +
>  			if (data->blocks > 1)
>  				len /= data->blksz;
>
> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
>
>  	meson_mmc_read_resp(host->mmc, cmd);
>
> +	if (cmd->opcode == 53) {
> +		dma_rmb();
> +		pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
> +	}
> +
>  	cmd->error = 0;
>  	if (status & IRQ_RXD_ERR_MASK) {
>  		dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>

the output is not really different (for the 2 cmd53)
[   37.113577] sg: idx 0 len 4
[   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
[   37.114016] sg: idx 0 len 4
[   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4

Helmut

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 20.03.2017 13:51, Helmut Klein wrote:
> On 19.03.2017 23:39, Heiner Kallweit wrote:
>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>
>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>
>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>> is much better now.
>>>>>>>>>>>
>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>
>>>>>>>>>>> But:
>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>
>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>
>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>
>>>>>>>>>> Could you please share few more details:
>>>>>>>>>> - Drivers involved
>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>
>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>> test feedback.
>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>
>>>>>>>>>>> regards
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>> are auto loaded.
>>>>>>>>>
>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>
>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>
>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>
>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>> reader).
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>
>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>> 01-72f124c5
>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 184
>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 188
>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 192
>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 196
>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 200
>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 204
>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>
>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>
>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>> failed <<<=====
>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>> image file download failed
>>>>>>>>>
>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>
>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>> KiB <<<=====
>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported     <<<=====
>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>> failed -19...
>>>>>>>>>
>>>>>>>>> regards
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>> of the patch
>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>
>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>> the
>>>>>>>> following one and re-test?
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>> ---
>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>
>>>>>>>> +struct sd_emmc_desc {
>>>>>>>> +    u32 cmd_cfg;
>>>>>>>> +    u32 cmd_arg;
>>>>>>>> +    u32 cmd_data;
>>>>>>>> +    u32 cmd_resp;
>>>>>>>> +};
>>>>>>>> +
>>>>>>>>  struct meson_host {
>>>>>>>>      struct    device        *dev;
>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>
>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>> -    void *bounce_buf;
>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>
>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>  };
>>>>>>>>
>>>>>>>> -struct sd_emmc_desc {
>>>>>>>> -    u32 cmd_cfg;
>>>>>>>> -    u32 cmd_arg;
>>>>>>>> -    u32 cmd_data;
>>>>>>>> -    u32 cmd_resp;
>>>>>>>> -};
>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>          return NULL;
>>>>>>>>  }
>>>>>>>>
>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>> mmc_data *data)
>>>>>>>> +{
>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>> +}
>>>>>>>> +
>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq)
>>>>>>>> +{
>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>> +
>>>>>>>> +    if (!data)
>>>>>>>> +        return;
>>>>>>>> +
>>>>>>>> +    data->host_cookie = true;
>>>>>>>> +
>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>> data->sg_len,
>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>> +    if (!data->sg_count)
>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>> +}
>>>>>>>> +
>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq,
>>>>>>>> +                   int err)
>>>>>>>> +{
>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>> +
>>>>>>>> +    if (data && data->sg_count)
>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>> +}
>>>>>>>> +
>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>> long clk_rate)
>>>>>>>>  {
>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>> mmc_command *cmd)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>> -    u32 cfg;
>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>> +    struct scatterlist *sg;
>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>> +    u8 blk_len;
>>>>>>>> +    int i;
>>>>>>>>
>>>>>>>> -    /* Setup descriptors */
>>>>>>>>      dma_rmb();
>>>>>>>> -    desc = &desc_tmp;
>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>
>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>
>>>>>>>>      /* Response */
>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>
>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>
>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>      } else {
>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>      }
>>>>>>>>
>>>>>>>> -    /* data? */
>>>>>>>> -    if (cmd->data) {
>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>> +    if (data) {
>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>> +
>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>
>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>> %d\n",
>>>>>>>> -                    __func__, blk_len,
>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>              }
>>>>>>>> -        } else {
>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>          }
>>>>>>>>
>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>> -            dma_wmb();
>>>>>>>> -        } else {
>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>> -        }
>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>
>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>> +
>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>> +
>>>>>>>> +            if (data->blocks > 1)
>>>>>>>> +                len /= data->blksz;
>>>>>>>> +
>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>> +            if (i > 0)
>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>> +        }
>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>
>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>      } else {
>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>      }
>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>
>>>>>>>>      host->cmd = cmd;
>>>>>>>>
>>>>>>>> -    /* Last descriptor */
>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>  }
>>>>>>>>
>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>> !mrq->data->host_cookie;
>>>>>>>> +
>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>
>>>>>>>>      /* Stop execution */
>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>      else
>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>> +
>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>  }
>>>>>>>>
>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>> mmc_command *cmd)
>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>> void *dev_id)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>      struct mmc_command *cmd;
>>>>>>>> +    struct mmc_data *data;
>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>
>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>> void *dev_id)
>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>          return IRQ_NONE;
>>>>>>>>
>>>>>>>> +    data = cmd->data;
>>>>>>>> +
>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>> void *dev_id)
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>      }
>>>>>>>> +
>>>>>>>> +    if (data && !cmd->error)
>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>> +
>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>
>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>> -    else  {
>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>> +    } else  {
>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>> -    struct mmc_data *data;
>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>
>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>          return IRQ_NONE;
>>>>>>>>
>>>>>>>> -    data = cmd->data;
>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>> -    }
>>>>>>>> -
>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>> -    if (next_cmd)
>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>> -    else
>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>
>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>  }
>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>> meson_mmc_ops = {
>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>  };
>>>>>>>>
>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>> platform_device *pdev)
>>>>>>>>
>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>> -
>>>>>>>> -    /* data bounce buffer */
>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>> -    host->bounce_buf =
>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>> buffer.\n");
>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>> +
>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>> +    if (!host->descs) {
>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>> failed\n");
>>>>>>>>          ret = -ENOMEM;
>>>>>>>>          goto err_div_clk;
>>>>>>>>      }
>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>> platform_device *pdev)
>>>>>>>>      /* disable interrupts */
>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>
>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>
>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>
>>>>>>>
>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>
>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>> understand why SD and eMMC mode
>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>> I don't have HW to test SDIO mode on.
>>>>>>
>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>> post the mmc/brcmfmac related output?
>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>
>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>> would give an idea whether any SDIO
>>>>>> or just specific ones fail.
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>>> regards
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>> configuration.
>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>> This resulted in a different order of the mmc devices. The
>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>
>>>>> Without your new patch the wifi adapter works normally.
>>>>>
>>>>> The debug info was produced with following commad sequence
>>>>>  dmesg -n 8
>>>>>  dmesg -D
>>>>>  logger "loading meson-gx-mmc...."
>>>>>  modprobe meson-gx-mmc
>>>>>  sleep 1
>>>>>  logger "loading brcmfmac"
>>>>>  modprobe brcmfmac
>>>>>  logger "modules loaded"
>>>>>  sleep 1
>>>>>  cp /var/log/syslog ~/syslog
>>>>>  cp /proc/interrupts ~/interrupts
>>>>>
>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>
>>>>> because of the length of the files i removed most lines of the
>>>>> loading of meson-gx-mmc
>>>>>
>>>>> unhandled interrupts: independent of the number of applied patches
>>>>> i've always got 11 of them.
>>>>>  Only the timings differed with the applied patches
>>>>>
>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>> 400000 -> 52000000
>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>> 52000000 != actual rate 50000000
>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>   loading brcmfmac
>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>> available.
>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>> brcmf_sdiod_probe...
>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000a, nbytes=1
>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000b, nbytes=1
>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000c, nbytes=1
>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>> 1000 ms nsac 0
>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>> data:0x00000000             <<<<===== wrong!
>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x21
>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>> data:0x00
>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000f, nbytes=1
>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>> 1000 ms nsac 0
>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>> BCM0, rev=0
>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>> supported
>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>> brcmf_chip_attach failed!
>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>> brcmf_sdio_probe_attach failed
>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>> oob=0 sd=0
>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>> failed -19...
>>>>>
>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>> lines after the first CMD53)
>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>> 400000 -> 52000000
>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>> 52000000 != actual rate 50000000
>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>   loading brcmfmac
>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>> available.
>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>> brcmf_sdiod_probe...
>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000a, nbytes=1
>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000b, nbytes=1
>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000c, nbytes=1
>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>> 1000 ms nsac 0
>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>> data:0x16044330               <<<<<====== ok
>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>
>>>>> if you need more data: just ask ;-)
>>>>>
>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>> the actual register value.
>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>> send the log?
>>>> I hope the two debug messages bring me closer to the root cause of
>>>> the issue.
>>>>
>>>> Rgds, Heiner
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>              unsigned int len = sg_dma_len(sg);
>>>>
>>>> +            if (cmd->opcode == 53)
>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>> len);
>>>> +
>>>>              if (data->blocks > 1)
>>>>                  len /= data->blksz;
>>>>
>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>> *dev_id)
>>>>
>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>
>>>> +    if (cmd->opcode == 53)
>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>> host->descs[0].cmd_data);
>>>> +
>>>>      cmd->error = 0;
>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>
>>>
>>> here is the output:
>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>> addr=0x08000, nbytes=4
>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>> nsac 0
>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>> 00000000
>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>
>>> Helmut
>>>
>>>
>> Weird .. Everything looks ok so far. I don't see a reason why this
>> small read DMA returns
>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>
>> OK, one last attempt before I have to think about a better way to
>> tackle this issue.
>>
>> Could you please replace the last logging extension patch with this one?
>> (I just added a memory barrier to be sure to read the actual value.)
>>
>> Thanks, Heiner
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>> b/drivers/mmc/host/meson-gx-mmc.c
>> index ca685902..5b511944 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>> *mmc, struct mmc_command *cmd)
>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>              unsigned int len = sg_dma_len(sg);
>>
>> +            if (cmd->opcode == 53)
>> +                pr_info("sg: idx %d len %u\n", i, len);
>> +
>>              if (data->blocks > 1)
>>                  len /= data->blksz;
>>
>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>> *dev_id)
>>
>>      meson_mmc_read_resp(host->mmc, cmd);
>>
>> +    if (cmd->opcode == 53) {
>> +        dma_rmb();
>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>> +    }
>> +
>>      cmd->error = 0;
>>      if (status & IRQ_RXD_ERR_MASK) {
>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>
>
> the output is not really different (for the 2 cmd53)
> [   37.113577] sg: idx 0 len 4
> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
> [   37.114016] sg: idx 0 len 4
> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>
> Helmut


I've added my own debugging code to both variations of the driver. but 
without a positiv result

here are the patches

for the fully operational version

--- a/drivers/mmc/host/meson-gx-mmc.c	2017-03-18 15:22:31.000000000 +0100
+++ b/drivers/mmc/host/meson-gx-mmc.c	2017-03-20 13:02:05.254762191 +0100
@@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m

  	/* data? */
  	if (cmd->data) {
+
+		dev_dbg(host->dev, "DBG data");
+
  		desc->cmd_cfg |= CMD_CFG_DATA_IO;
  		if (cmd->data->blocks > 1) {
  			desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
@@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
  	writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
  	writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
  	wmb(); /* ensure descriptor is written before kicked */
+
+	dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
+		desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
+
  	writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
  }

@@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
  	raw_status = readl(host->regs + SD_EMMC_STATUS);
  	status = raw_status & irq_en;

+	dev_dbg(host->dev, "DBG status 0x%08x", status);
+
  	if (!status) {
  		dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
  			 raw_status, irq_en);

and this is for the version with the sdio problem

--- a/drivers/mmc/host/meson-gx-mmc.c	2017-03-20 12:50:32.956474080 +0100
+++ b/drivers/mmc/host/meson-gx-mmc.c	2017-03-20 12:57:27.185837225 +0100
@@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
  	}

  	if (data) {
+
+		dev_dbg(host->dev, "DBG data");
+
  		cmd_cfg |= CMD_CFG_DATA_IO;

  		if (data->blocks > 1) {
@@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
  	host->cmd = cmd;

  	wmb(); /* ensure descriptor is written before kicked */
+
+	dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
+		desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
+
  	cfg = host->descs_dma_addr | START_DESC_BUSY;
  	writel(cfg, host->regs + SD_EMMC_START);
  }
@@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
  	raw_status = readl(host->regs + SD_EMMC_STATUS);
  	status = raw_status & irq_en;

+	dev_dbg(host->dev, "DBG status 0x%08x", status);
+
  	if (!status) {
  		dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
  			 raw_status, irq_en);

the filtered logs are identical up and including the 2nd cmd53.

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 20.03.2017 13:51, Helmut Klein wrote:
> On 19.03.2017 23:39, Heiner Kallweit wrote:
>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>
>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>
>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>> is much better now.
>>>>>>>>>>>
>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>
>>>>>>>>>>> But:
>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>
>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>
>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>
>>>>>>>>>> Could you please share few more details:
>>>>>>>>>> - Drivers involved
>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>
>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>> test feedback.
>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>
>>>>>>>>>>> regards
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>> are auto loaded.
>>>>>>>>>
>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>
>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>
>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>
>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>> reader).
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>
>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>> 01-72f124c5
>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 184
>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 188
>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 192
>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 196
>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 200
>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 204
>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>
>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>
>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>> failed <<<=====
>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>> image file download failed
>>>>>>>>>
>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>
>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>> KiB <<<=====
>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported     <<<=====
>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>> failed -19...
>>>>>>>>>
>>>>>>>>> regards
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>> of the patch
>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>
>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>> the
>>>>>>>> following one and re-test?
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>> ---
>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>
>>>>>>>> +struct sd_emmc_desc {
>>>>>>>> +    u32 cmd_cfg;
>>>>>>>> +    u32 cmd_arg;
>>>>>>>> +    u32 cmd_data;
>>>>>>>> +    u32 cmd_resp;
>>>>>>>> +};
>>>>>>>> +
>>>>>>>>  struct meson_host {
>>>>>>>>      struct    device        *dev;
>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>
>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>> -    void *bounce_buf;
>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>
>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>  };
>>>>>>>>
>>>>>>>> -struct sd_emmc_desc {
>>>>>>>> -    u32 cmd_cfg;
>>>>>>>> -    u32 cmd_arg;
>>>>>>>> -    u32 cmd_data;
>>>>>>>> -    u32 cmd_resp;
>>>>>>>> -};
>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>          return NULL;
>>>>>>>>  }
>>>>>>>>
>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>> mmc_data *data)
>>>>>>>> +{
>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>> +}
>>>>>>>> +
>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq)
>>>>>>>> +{
>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>> +
>>>>>>>> +    if (!data)
>>>>>>>> +        return;
>>>>>>>> +
>>>>>>>> +    data->host_cookie = true;
>>>>>>>> +
>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>> data->sg_len,
>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>> +    if (!data->sg_count)
>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>> +}
>>>>>>>> +
>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq,
>>>>>>>> +                   int err)
>>>>>>>> +{
>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>> +
>>>>>>>> +    if (data && data->sg_count)
>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>> +}
>>>>>>>> +
>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>> long clk_rate)
>>>>>>>>  {
>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>> mmc_command *cmd)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>> -    u32 cfg;
>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>> +    struct scatterlist *sg;
>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>> +    u8 blk_len;
>>>>>>>> +    int i;
>>>>>>>>
>>>>>>>> -    /* Setup descriptors */
>>>>>>>>      dma_rmb();
>>>>>>>> -    desc = &desc_tmp;
>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>
>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>
>>>>>>>>      /* Response */
>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>
>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>
>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>      } else {
>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>      }
>>>>>>>>
>>>>>>>> -    /* data? */
>>>>>>>> -    if (cmd->data) {
>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>> +    if (data) {
>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>> +
>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>
>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>> %d\n",
>>>>>>>> -                    __func__, blk_len,
>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>              }
>>>>>>>> -        } else {
>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>          }
>>>>>>>>
>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>> -            dma_wmb();
>>>>>>>> -        } else {
>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>> -        }
>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>
>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>> +
>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>> +
>>>>>>>> +            if (data->blocks > 1)
>>>>>>>> +                len /= data->blksz;
>>>>>>>> +
>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>> +            if (i > 0)
>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>> +        }
>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>
>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>      } else {
>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>      }
>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>
>>>>>>>>      host->cmd = cmd;
>>>>>>>>
>>>>>>>> -    /* Last descriptor */
>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>  }
>>>>>>>>
>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>> !mrq->data->host_cookie;
>>>>>>>> +
>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>
>>>>>>>>      /* Stop execution */
>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>      else
>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>> +
>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>  }
>>>>>>>>
>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>> mmc_command *cmd)
>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>> void *dev_id)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>      struct mmc_command *cmd;
>>>>>>>> +    struct mmc_data *data;
>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>
>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>> void *dev_id)
>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>          return IRQ_NONE;
>>>>>>>>
>>>>>>>> +    data = cmd->data;
>>>>>>>> +
>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>> void *dev_id)
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>      }
>>>>>>>> +
>>>>>>>> +    if (data && !cmd->error)
>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>> +
>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>
>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>> -    else  {
>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>> +    } else  {
>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>  {
>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>> -    struct mmc_data *data;
>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>
>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>          return IRQ_NONE;
>>>>>>>>
>>>>>>>> -    data = cmd->data;
>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>> -    }
>>>>>>>> -
>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>> -    if (next_cmd)
>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>> -    else
>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>
>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>  }
>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>> meson_mmc_ops = {
>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>  };
>>>>>>>>
>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>> platform_device *pdev)
>>>>>>>>
>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>> -
>>>>>>>> -    /* data bounce buffer */
>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>> -    host->bounce_buf =
>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>> buffer.\n");
>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>> +
>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>> +    if (!host->descs) {
>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>> failed\n");
>>>>>>>>          ret = -ENOMEM;
>>>>>>>>          goto err_div_clk;
>>>>>>>>      }
>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>> platform_device *pdev)
>>>>>>>>      /* disable interrupts */
>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>
>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>
>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>
>>>>>>>
>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>
>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>> understand why SD and eMMC mode
>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>> I don't have HW to test SDIO mode on.
>>>>>>
>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>> post the mmc/brcmfmac related output?
>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>
>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>> would give an idea whether any SDIO
>>>>>> or just specific ones fail.
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>>> regards
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>> configuration.
>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>> This resulted in a different order of the mmc devices. The
>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>
>>>>> Without your new patch the wifi adapter works normally.
>>>>>
>>>>> The debug info was produced with following commad sequence
>>>>>  dmesg -n 8
>>>>>  dmesg -D
>>>>>  logger "loading meson-gx-mmc...."
>>>>>  modprobe meson-gx-mmc
>>>>>  sleep 1
>>>>>  logger "loading brcmfmac"
>>>>>  modprobe brcmfmac
>>>>>  logger "modules loaded"
>>>>>  sleep 1
>>>>>  cp /var/log/syslog ~/syslog
>>>>>  cp /proc/interrupts ~/interrupts
>>>>>
>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>
>>>>> because of the length of the files i removed most lines of the
>>>>> loading of meson-gx-mmc
>>>>>
>>>>> unhandled interrupts: independent of the number of applied patches
>>>>> i've always got 11 of them.
>>>>>  Only the timings differed with the applied patches
>>>>>
>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>> 00000000 00000000
>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>> timeout
>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>> 400000 -> 52000000
>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>> 52000000 != actual rate 50000000
>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>   loading brcmfmac
>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>> available.
>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>> brcmf_sdiod_probe...
>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000a, nbytes=1
>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000b, nbytes=1
>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000c, nbytes=1
>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>> 1000 ms nsac 0
>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>> data:0x00000000             <<<<===== wrong!
>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x21
>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>> data:0x00
>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000f, nbytes=1
>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>> 1000 ms nsac 0
>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>> BCM0, rev=0
>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>> supported
>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>> brcmf_chip_attach failed!
>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>> brcmf_sdio_probe_attach failed
>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>> oob=0 sd=0
>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>> failed -19...
>>>>>
>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>> lines after the first CMD53)
>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>> 00000000 00000000
>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>> 400000 -> 52000000
>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>> 52000000 != actual rate 50000000
>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>   loading brcmfmac
>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>> available.
>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>> brcmf_sdiod_probe...
>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000a, nbytes=1
>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000b, nbytes=1
>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000c, nbytes=1
>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>> 1000 ms nsac 0
>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>> data:0x16044330               <<<<<====== ok
>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>> 00000000 00000000
>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>> data:0x28
>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>> addr=0x1000e, nbytes=1
>>>>>
>>>>> if you need more data: just ask ;-)
>>>>>
>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>> the actual register value.
>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>> send the log?
>>>> I hope the two debug messages bring me closer to the root cause of
>>>> the issue.
>>>>
>>>> Rgds, Heiner
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>              unsigned int len = sg_dma_len(sg);
>>>>
>>>> +            if (cmd->opcode == 53)
>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>> len);
>>>> +
>>>>              if (data->blocks > 1)
>>>>                  len /= data->blksz;
>>>>
>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>> *dev_id)
>>>>
>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>
>>>> +    if (cmd->opcode == 53)
>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>> host->descs[0].cmd_data);
>>>> +
>>>>      cmd->error = 0;
>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>
>>>
>>> here is the output:
>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>> addr=0x08000, nbytes=4
>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>> nsac 0
>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>> 00000000
>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>
>>> Helmut
>>>
>>>
>> Weird .. Everything looks ok so far. I don't see a reason why this
>> small read DMA returns
>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>
>> OK, one last attempt before I have to think about a better way to
>> tackle this issue.
>>
>> Could you please replace the last logging extension patch with this one?
>> (I just added a memory barrier to be sure to read the actual value.)
>>
>> Thanks, Heiner
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>> b/drivers/mmc/host/meson-gx-mmc.c
>> index ca685902..5b511944 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>> *mmc, struct mmc_command *cmd)
>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>              unsigned int len = sg_dma_len(sg);
>>
>> +            if (cmd->opcode == 53)
>> +                pr_info("sg: idx %d len %u\n", i, len);
>> +
>>              if (data->blocks > 1)
>>                  len /= data->blksz;
>>
>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>> *dev_id)
>>
>>      meson_mmc_read_resp(host->mmc, cmd);
>>
>> +    if (cmd->opcode == 53) {
>> +        dma_rmb();
>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>> +    }
>> +
>>      cmd->error = 0;
>>      if (status & IRQ_RXD_ERR_MASK) {
>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>
>
> the output is not really different (for the 2 cmd53)
> [   37.113577] sg: idx 0 len 4
> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
> [   37.114016] sg: idx 0 len 4
> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>
> Helmut


I've added my own debugging code to both variations of the driver. but 
without a positiv result

here are the patches

for the fully operational version

--- a/drivers/mmc/host/meson-gx-mmc.c	2017-03-18 15:22:31.000000000 +0100
+++ b/drivers/mmc/host/meson-gx-mmc.c	2017-03-20 13:02:05.254762191 +0100
@@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m

  	/* data? */
  	if (cmd->data) {
+
+		dev_dbg(host->dev, "DBG data");
+
  		desc->cmd_cfg |= CMD_CFG_DATA_IO;
  		if (cmd->data->blocks > 1) {
  			desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
@@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
  	writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
  	writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
  	wmb(); /* ensure descriptor is written before kicked */
+
+	dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
+		desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
+
  	writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
  }

@@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
  	raw_status = readl(host->regs + SD_EMMC_STATUS);
  	status = raw_status & irq_en;

+	dev_dbg(host->dev, "DBG status 0x%08x", status);
+
  	if (!status) {
  		dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
  			 raw_status, irq_en);

and this is for the version with the sdio problem

--- a/drivers/mmc/host/meson-gx-mmc.c	2017-03-20 12:50:32.956474080 +0100
+++ b/drivers/mmc/host/meson-gx-mmc.c	2017-03-20 12:57:27.185837225 +0100
@@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
  	}

  	if (data) {
+
+		dev_dbg(host->dev, "DBG data");
+
  		cmd_cfg |= CMD_CFG_DATA_IO;

  		if (data->blocks > 1) {
@@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
  	host->cmd = cmd;

  	wmb(); /* ensure descriptor is written before kicked */
+
+	dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
+		desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
+
  	cfg = host->descs_dma_addr | START_DESC_BUSY;
  	writel(cfg, host->regs + SD_EMMC_START);
  }
@@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
  	raw_status = readl(host->regs + SD_EMMC_STATUS);
  	status = raw_status & irq_en;

+	dev_dbg(host->dev, "DBG status 0x%08x", status);
+
  	if (!status) {
  		dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
  			 raw_status, irq_en);

the filtered logs are identical up and including the 2nd cmd53.

Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 20.03.2017 um 14:01 schrieb Helmut Klein:
> On 20.03.2017 13:51, Helmut Klein wrote:
>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>
>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>
>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>
>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>
>>>>>>>>>>>> But:
>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>
>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>
>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>
>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>> - Drivers involved
>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>
>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>> test feedback.
>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>> are auto loaded.
>>>>>>>>>>
>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>
>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>
>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>
>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>> reader).
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>
>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>> 01-72f124c5
>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>
>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>
>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>> failed <<<=====
>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>> image file download failed
>>>>>>>>>>
>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>
>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>> KiB <<<=====
>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported     <<<=====
>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>> failed -19...
>>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>> of the patch
>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>
>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>> the
>>>>>>>>> following one and re-test?
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>> ---
>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>
>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>> +    u32 cmd_data;
>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>> +};
>>>>>>>>> +
>>>>>>>>>  struct meson_host {
>>>>>>>>>      struct    device        *dev;
>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>
>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>> -    void *bounce_buf;
>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>
>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>  };
>>>>>>>>>
>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>> -    u32 cmd_data;
>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>> -};
>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>          return NULL;
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>> mmc_data *data)
>>>>>>>>> +{
>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq)
>>>>>>>>> +{
>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>> +
>>>>>>>>> +    if (!data)
>>>>>>>>> +        return;
>>>>>>>>> +
>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>> +
>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>> data->sg_len,
>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq,
>>>>>>>>> +                   int err)
>>>>>>>>> +{
>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>> +
>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>> long clk_rate)
>>>>>>>>>  {
>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>> mmc_command *cmd)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>> -    u32 cfg;
>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>> +    u8 blk_len;
>>>>>>>>> +    int i;
>>>>>>>>>
>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>      dma_rmb();
>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>
>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>
>>>>>>>>>      /* Response */
>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>
>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>
>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>      } else {
>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>> -    /* data? */
>>>>>>>>> -    if (cmd->data) {
>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>> +    if (data) {
>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>> +
>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>
>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>> %d\n",
>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>              }
>>>>>>>>> -        } else {
>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>          }
>>>>>>>>>
>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>> -            dma_wmb();
>>>>>>>>> -        } else {
>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>> -        }
>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>
>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>> +
>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>> +
>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>> +                len /= data->blksz;
>>>>>>>>> +
>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>> +            if (i > 0)
>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>> +        }
>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>
>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>      } else {
>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>      }
>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>
>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>
>>>>>>>>> -    /* Last descriptor */
>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>> +
>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>
>>>>>>>>>      /* Stop execution */
>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>      else
>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>> +
>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>> mmc_command *cmd)
>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>> void *dev_id)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>
>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>> void *dev_id)
>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>
>>>>>>>>> +    data = cmd->data;
>>>>>>>>> +
>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>> void *dev_id)
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>      }
>>>>>>>>> +
>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>> +
>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>
>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>> -    else  {
>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>> +    } else  {
>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>
>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>
>>>>>>>>> -    data = cmd->data;
>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>> -    }
>>>>>>>>> -
>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>> -    if (next_cmd)
>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>> -    else
>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>
>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>  }
>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>  };
>>>>>>>>>
>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>> platform_device *pdev)
>>>>>>>>>
>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>> -
>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>> -    host->bounce_buf =
>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>> buffer.\n");
>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>> +
>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>> +    if (!host->descs) {
>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>> failed\n");
>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>          goto err_div_clk;
>>>>>>>>>      }
>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>> platform_device *pdev)
>>>>>>>>>      /* disable interrupts */
>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>
>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>
>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>
>>>>>>>>
>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>
>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>> understand why SD and eMMC mode
>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>
>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>> post the mmc/brcmfmac related output?
>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>
>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>> would give an idea whether any SDIO
>>>>>>> or just specific ones fail.
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>> regards
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>> configuration.
>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>> This resulted in a different order of the mmc devices. The
>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>
>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>
>>>>>> The debug info was produced with following commad sequence
>>>>>>  dmesg -n 8
>>>>>>  dmesg -D
>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>  modprobe meson-gx-mmc
>>>>>>  sleep 1
>>>>>>  logger "loading brcmfmac"
>>>>>>  modprobe brcmfmac
>>>>>>  logger "modules loaded"
>>>>>>  sleep 1
>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>
>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>
>>>>>> because of the length of the files i removed most lines of the
>>>>>> loading of meson-gx-mmc
>>>>>>
>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>> i've always got 11 of them.
>>>>>>  Only the timings differed with the applied patches
>>>>>>
>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>> 400000 -> 52000000
>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>> 52000000 != actual rate 50000000
>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>   loading brcmfmac
>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>> available.
>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>> brcmf_sdiod_probe...
>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000a, nbytes=1
>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000b, nbytes=1
>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000c, nbytes=1
>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>> 1000 ms nsac 0
>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x21
>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>> data:0x00
>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000f, nbytes=1
>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>> 1000 ms nsac 0
>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>> BCM0, rev=0
>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>> supported
>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>> brcmf_chip_attach failed!
>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>> brcmf_sdio_probe_attach failed
>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>> oob=0 sd=0
>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>> failed -19...
>>>>>>
>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>> lines after the first CMD53)
>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>> 400000 -> 52000000
>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>> 52000000 != actual rate 50000000
>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>   loading brcmfmac
>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>> available.
>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>> brcmf_sdiod_probe...
>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000a, nbytes=1
>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000b, nbytes=1
>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000c, nbytes=1
>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>> 1000 ms nsac 0
>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>
>>>>>> if you need more data: just ask ;-)
>>>>>>
>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>> the actual register value.
>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>> send the log?
>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>> the issue.
>>>>>
>>>>> Rgds, Heiner
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>
>>>>> +            if (cmd->opcode == 53)
>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>> len);
>>>>> +
>>>>>              if (data->blocks > 1)
>>>>>                  len /= data->blksz;
>>>>>
>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>> *dev_id)
>>>>>
>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>
>>>>> +    if (cmd->opcode == 53)
>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>> host->descs[0].cmd_data);
>>>>> +
>>>>>      cmd->error = 0;
>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>
>>>>
>>>> here is the output:
>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>> addr=0x08000, nbytes=4
>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>
>>>> Helmut
>>>>
>>>>
>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>> small read DMA returns
>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>
>>> OK, one last attempt before I have to think about a better way to
>>> tackle this issue.
>>>
>>> Could you please replace the last logging extension patch with this one?
>>> (I just added a memory barrier to be sure to read the actual value.)
>>>
>>> Thanks, Heiner
>>>
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>> b/drivers/mmc/host/meson-gx-mmc.c
>>> index ca685902..5b511944 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>> *mmc, struct mmc_command *cmd)
>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>              unsigned int len = sg_dma_len(sg);
>>>
>>> +            if (cmd->opcode == 53)
>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>> +
>>>              if (data->blocks > 1)
>>>                  len /= data->blksz;
>>>
>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>> *dev_id)
>>>
>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>
>>> +    if (cmd->opcode == 53) {
>>> +        dma_rmb();
>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>> +    }
>>> +
>>>      cmd->error = 0;
>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>
>>
>> the output is not really different (for the 2 cmd53)
>> [   37.113577] sg: idx 0 len 4
>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>> [   37.114016] sg: idx 0 len 4
>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>
>> Helmut
> 
> 
> I've added my own debugging code to both variations of the driver. but without a positiv result
> 
> here are the patches
> 
> for the fully operational version
> 
> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
> 
>      /* data? */
>      if (cmd->data) {
> +
> +        dev_dbg(host->dev, "DBG data");
> +
>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>          if (cmd->data->blocks > 1) {
>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>      wmb(); /* ensure descriptor is written before kicked */
> +
> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
> +
>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>  }
> 
> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>      status = raw_status & irq_en;
> 
> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
> +
>      if (!status) {
>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>               raw_status, irq_en);
> 
> and this is for the version with the sdio problem
> 
> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>      }
> 
>      if (data) {
> +
> +        dev_dbg(host->dev, "DBG data");
> +
>          cmd_cfg |= CMD_CFG_DATA_IO;
> 
>          if (data->blocks > 1) {
> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>      host->cmd = cmd;
> 
>      wmb(); /* ensure descriptor is written before kicked */
> +
> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
> +
>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>      writel(cfg, host->regs + SD_EMMC_START);
>  }
> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>      status = raw_status & irq_en;
> 
> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
> +
>      if (!status) {
>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>               raw_status, irq_en);
> 
> the filtered logs are identical up and including the 2nd cmd53.
> 
> Helmut
> 
> 
Thanks. Really appreciate your support. Meanwhile I think there must be a bug
either in the DMA subsystem or there's a hw bug causing issues with very small
transfers. That's the only difference between SD/eMMC and SDIO on that level:
SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
transfers.

For up to 4 bytes the chip supports an alternative transfer method.
Let's try this as workaround.

Could you please apply:
patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:


diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 4f9fafd3..cf9be13f 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
 		return NULL;
 }
 
+static bool meson_mmc_small_read(const struct mmc_data *data)
+{
+	return data && data->blocks <= 1 && data->blksz <= 4 &&
+	       data->flags & MMC_DATA_READ;
+}
+
 static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
 {
 	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
@@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
 static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
 			       int err)
 {
+	struct meson_host *host = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;
 
 	if (data && data->sg_count)
 		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
 			     meson_mmc_get_data_dir(data));
+
+	if (meson_mmc_small_read(data)) {
+		int cnt;
+
+		dma_rmb();
+		cnt = sg_copy_from_buffer(data->sg, data->sg_len,
+				&host->descs[0].cmd_data, data->blksz);
+		if (cnt != data->blksz)
+			dev_err(host->dev, "error copying to scatterlist\n");
+	}
 }
 
 static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
@@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 	}
 
 	if (data) {
+		bool small_read = meson_mmc_small_read(data);
+
 		cmd_cfg |= CMD_CFG_DATA_IO;
 
 		if (data->blocks > 1) {
@@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 			}
 		}
 
+		/*
+		 * workaround for most likely hw bug
+		 * if up to 4 bytes receive them in the descriptor instead
+		 * of using dma_map_sg/dma_unmap_sg
+		*/
+		if (small_read)
+			cmd_cfg |= CMD_CFG_DATA_NUM;
+
 		data->bytes_xfered = 0;
 		if (data->flags & MMC_DATA_WRITE)
 			cmd_cfg |= CMD_CFG_DATA_WR;
@@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
 			desc[i].cmd_arg = cmd->arg;
 			desc[i].cmd_resp = 0;
-			desc[i].cmd_data = sg_dma_address(sg);
+			desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
 		}
 		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
 
-- 
2.12.0

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 20.03.2017 um 14:01 schrieb Helmut Klein:
> On 20.03.2017 13:51, Helmut Klein wrote:
>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>
>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>
>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>
>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>
>>>>>>>>>>>> But:
>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>
>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>
>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>
>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>> - Drivers involved
>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>
>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>> test feedback.
>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>> are auto loaded.
>>>>>>>>>>
>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>
>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>
>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>
>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>> reader).
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>
>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>> 01-72f124c5
>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>
>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>
>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>> failed <<<=====
>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>> image file download failed
>>>>>>>>>>
>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>
>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>> KiB <<<=====
>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported     <<<=====
>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>> failed -19...
>>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>> of the patch
>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>
>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>> the
>>>>>>>>> following one and re-test?
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>> ---
>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>
>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>> +    u32 cmd_data;
>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>> +};
>>>>>>>>> +
>>>>>>>>>  struct meson_host {
>>>>>>>>>      struct    device        *dev;
>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>
>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>> -    void *bounce_buf;
>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>
>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>  };
>>>>>>>>>
>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>> -    u32 cmd_data;
>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>> -};
>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>          return NULL;
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>> mmc_data *data)
>>>>>>>>> +{
>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq)
>>>>>>>>> +{
>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>> +
>>>>>>>>> +    if (!data)
>>>>>>>>> +        return;
>>>>>>>>> +
>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>> +
>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>> data->sg_len,
>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq,
>>>>>>>>> +                   int err)
>>>>>>>>> +{
>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>> +
>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>> long clk_rate)
>>>>>>>>>  {
>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>> mmc_command *cmd)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>> -    u32 cfg;
>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>> +    u8 blk_len;
>>>>>>>>> +    int i;
>>>>>>>>>
>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>      dma_rmb();
>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>
>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>
>>>>>>>>>      /* Response */
>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>
>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>
>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>      } else {
>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>> -    /* data? */
>>>>>>>>> -    if (cmd->data) {
>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>> +    if (data) {
>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>> +
>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>
>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>> %d\n",
>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>              }
>>>>>>>>> -        } else {
>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>          }
>>>>>>>>>
>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>> -            dma_wmb();
>>>>>>>>> -        } else {
>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>> -        }
>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>
>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>> +
>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>> +
>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>> +                len /= data->blksz;
>>>>>>>>> +
>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>> +            if (i > 0)
>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>> +        }
>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>
>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>      } else {
>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>      }
>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>
>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>
>>>>>>>>> -    /* Last descriptor */
>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>> +
>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>
>>>>>>>>>      /* Stop execution */
>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>      else
>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>> +
>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>> mmc_command *cmd)
>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>> void *dev_id)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>
>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>> void *dev_id)
>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>
>>>>>>>>> +    data = cmd->data;
>>>>>>>>> +
>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>> void *dev_id)
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>      }
>>>>>>>>> +
>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>> +
>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>
>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>> -    else  {
>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>> +    } else  {
>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>  {
>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>
>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>
>>>>>>>>> -    data = cmd->data;
>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>> -    }
>>>>>>>>> -
>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>> -    if (next_cmd)
>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>> -    else
>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>
>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>  }
>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>  };
>>>>>>>>>
>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>> platform_device *pdev)
>>>>>>>>>
>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>> -
>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>> -    host->bounce_buf =
>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>> buffer.\n");
>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>> +
>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>> +    if (!host->descs) {
>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>> failed\n");
>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>          goto err_div_clk;
>>>>>>>>>      }
>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>> platform_device *pdev)
>>>>>>>>>      /* disable interrupts */
>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>
>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>
>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>
>>>>>>>>
>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>
>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>> understand why SD and eMMC mode
>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>
>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>> post the mmc/brcmfmac related output?
>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>
>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>> would give an idea whether any SDIO
>>>>>>> or just specific ones fail.
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>> regards
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>> configuration.
>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>> This resulted in a different order of the mmc devices. The
>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>
>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>
>>>>>> The debug info was produced with following commad sequence
>>>>>>  dmesg -n 8
>>>>>>  dmesg -D
>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>  modprobe meson-gx-mmc
>>>>>>  sleep 1
>>>>>>  logger "loading brcmfmac"
>>>>>>  modprobe brcmfmac
>>>>>>  logger "modules loaded"
>>>>>>  sleep 1
>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>
>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>
>>>>>> because of the length of the files i removed most lines of the
>>>>>> loading of meson-gx-mmc
>>>>>>
>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>> i've always got 11 of them.
>>>>>>  Only the timings differed with the applied patches
>>>>>>
>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>> 00000000 00000000
>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>> timeout
>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>> 400000 -> 52000000
>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>> 52000000 != actual rate 50000000
>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>   loading brcmfmac
>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>> available.
>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>> brcmf_sdiod_probe...
>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000a, nbytes=1
>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000b, nbytes=1
>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000c, nbytes=1
>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>> 1000 ms nsac 0
>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x21
>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>> data:0x00
>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000f, nbytes=1
>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>> 1000 ms nsac 0
>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>> BCM0, rev=0
>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>> supported
>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>> brcmf_chip_attach failed!
>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>> brcmf_sdio_probe_attach failed
>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>> oob=0 sd=0
>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>> failed -19...
>>>>>>
>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>> lines after the first CMD53)
>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>> 00000000 00000000
>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>> 400000 -> 52000000
>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>> 52000000 != actual rate 50000000
>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>   loading brcmfmac
>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>> available.
>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>> brcmf_sdiod_probe...
>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000a, nbytes=1
>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000b, nbytes=1
>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000c, nbytes=1
>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>> 1000 ms nsac 0
>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>> 00000000 00000000
>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>> data:0x28
>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>> addr=0x1000e, nbytes=1
>>>>>>
>>>>>> if you need more data: just ask ;-)
>>>>>>
>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>> the actual register value.
>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>> send the log?
>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>> the issue.
>>>>>
>>>>> Rgds, Heiner
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>
>>>>> +            if (cmd->opcode == 53)
>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>> len);
>>>>> +
>>>>>              if (data->blocks > 1)
>>>>>                  len /= data->blksz;
>>>>>
>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>> *dev_id)
>>>>>
>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>
>>>>> +    if (cmd->opcode == 53)
>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>> host->descs[0].cmd_data);
>>>>> +
>>>>>      cmd->error = 0;
>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>
>>>>
>>>> here is the output:
>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>> addr=0x08000, nbytes=4
>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>
>>>> Helmut
>>>>
>>>>
>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>> small read DMA returns
>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>
>>> OK, one last attempt before I have to think about a better way to
>>> tackle this issue.
>>>
>>> Could you please replace the last logging extension patch with this one?
>>> (I just added a memory barrier to be sure to read the actual value.)
>>>
>>> Thanks, Heiner
>>>
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>> b/drivers/mmc/host/meson-gx-mmc.c
>>> index ca685902..5b511944 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>> *mmc, struct mmc_command *cmd)
>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>              unsigned int len = sg_dma_len(sg);
>>>
>>> +            if (cmd->opcode == 53)
>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>> +
>>>              if (data->blocks > 1)
>>>                  len /= data->blksz;
>>>
>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>> *dev_id)
>>>
>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>
>>> +    if (cmd->opcode == 53) {
>>> +        dma_rmb();
>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>> +    }
>>> +
>>>      cmd->error = 0;
>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>
>>
>> the output is not really different (for the 2 cmd53)
>> [   37.113577] sg: idx 0 len 4
>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>> [   37.114016] sg: idx 0 len 4
>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>
>> Helmut
> 
> 
> I've added my own debugging code to both variations of the driver. but without a positiv result
> 
> here are the patches
> 
> for the fully operational version
> 
> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
> 
>      /* data? */
>      if (cmd->data) {
> +
> +        dev_dbg(host->dev, "DBG data");
> +
>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>          if (cmd->data->blocks > 1) {
>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>      wmb(); /* ensure descriptor is written before kicked */
> +
> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
> +
>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>  }
> 
> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>      status = raw_status & irq_en;
> 
> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
> +
>      if (!status) {
>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>               raw_status, irq_en);
> 
> and this is for the version with the sdio problem
> 
> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>      }
> 
>      if (data) {
> +
> +        dev_dbg(host->dev, "DBG data");
> +
>          cmd_cfg |= CMD_CFG_DATA_IO;
> 
>          if (data->blocks > 1) {
> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>      host->cmd = cmd;
> 
>      wmb(); /* ensure descriptor is written before kicked */
> +
> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
> +
>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>      writel(cfg, host->regs + SD_EMMC_START);
>  }
> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>      status = raw_status & irq_en;
> 
> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
> +
>      if (!status) {
>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>               raw_status, irq_en);
> 
> the filtered logs are identical up and including the 2nd cmd53.
> 
> Helmut
> 
> 
Thanks. Really appreciate your support. Meanwhile I think there must be a bug
either in the DMA subsystem or there's a hw bug causing issues with very small
transfers. That's the only difference between SD/eMMC and SDIO on that level:
SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
transfers.

For up to 4 bytes the chip supports an alternative transfer method.
Let's try this as workaround.

Could you please apply:
patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:


diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 4f9fafd3..cf9be13f 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
 		return NULL;
 }
 
+static bool meson_mmc_small_read(const struct mmc_data *data)
+{
+	return data && data->blocks <= 1 && data->blksz <= 4 &&
+	       data->flags & MMC_DATA_READ;
+}
+
 static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
 {
 	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
@@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
 static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
 			       int err)
 {
+	struct meson_host *host = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;
 
 	if (data && data->sg_count)
 		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
 			     meson_mmc_get_data_dir(data));
+
+	if (meson_mmc_small_read(data)) {
+		int cnt;
+
+		dma_rmb();
+		cnt = sg_copy_from_buffer(data->sg, data->sg_len,
+				&host->descs[0].cmd_data, data->blksz);
+		if (cnt != data->blksz)
+			dev_err(host->dev, "error copying to scatterlist\n");
+	}
 }
 
 static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
@@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 	}
 
 	if (data) {
+		bool small_read = meson_mmc_small_read(data);
+
 		cmd_cfg |= CMD_CFG_DATA_IO;
 
 		if (data->blocks > 1) {
@@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 			}
 		}
 
+		/*
+		 * workaround for most likely hw bug
+		 * if up to 4 bytes receive them in the descriptor instead
+		 * of using dma_map_sg/dma_unmap_sg
+		*/
+		if (small_read)
+			cmd_cfg |= CMD_CFG_DATA_NUM;
+
 		data->bytes_xfered = 0;
 		if (data->flags & MMC_DATA_WRITE)
 			cmd_cfg |= CMD_CFG_DATA_WR;
@@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
 			desc[i].cmd_arg = cmd->arg;
 			desc[i].cmd_resp = 0;
-			desc[i].cmd_data = sg_dma_address(sg);
+			desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
 		}
 		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
 
-- 
2.12.0

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 20.03.2017 20:54, Heiner Kallweit wrote:
> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>> On 20.03.2017 13:51, Helmut Klein wrote:
>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>
>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>
>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>
>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>
>>>>>>>>>>>>> But:
>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>
>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>
>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>> test feedback.
>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>
>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>
>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>
>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>
>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>> reader).
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>
>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>
>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>
>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>> failed <<<=====
>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>> image file download failed
>>>>>>>>>>>
>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>
>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>> failed -19...
>>>>>>>>>>>
>>>>>>>>>>> regards
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>> of the patch
>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>
>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>> the
>>>>>>>>>> following one and re-test?
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>> ---
>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>
>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>> +};
>>>>>>>>>> +
>>>>>>>>>>  struct meson_host {
>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>
>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>
>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>  };
>>>>>>>>>>
>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>> -};
>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>> +{
>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>> +
>>>>>>>>>> +    if (!data)
>>>>>>>>>> +        return;
>>>>>>>>>> +
>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>> +
>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>> data->sg_len,
>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>> +                   int err)
>>>>>>>>>> +{
>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>> +
>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>> long clk_rate)
>>>>>>>>>>  {
>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>> -    u32 cfg;
>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>> +    int i;
>>>>>>>>>>
>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>      dma_rmb();
>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>
>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>
>>>>>>>>>>      /* Response */
>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>
>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>
>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>      } else {
>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>> -    /* data? */
>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>> +    if (data) {
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>> +
>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>
>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>> %d\n",
>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>              }
>>>>>>>>>> -        } else {
>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>> -            dma_wmb();
>>>>>>>>>> -        } else {
>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>> -        }
>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>
>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>> +
>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>> +
>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>> +
>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>> +            if (i > 0)
>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +        }
>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>      } else {
>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>      }
>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>
>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>
>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>> +
>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>
>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>      else
>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>> +
>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>> void *dev_id)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>
>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>> void *dev_id)
>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>
>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>> +
>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>> void *dev_id)
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>      }
>>>>>>>>>> +
>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>> +
>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>
>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>> -    else  {
>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>> +    } else  {
>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>
>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>
>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>> -    }
>>>>>>>>>> -
>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>> -    else
>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>
>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>  }
>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>  };
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>
>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>> -
>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>> buffer.\n");
>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>> +
>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>> failed\n");
>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>      }
>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>
>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>
>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>
>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>> understand why SD and eMMC mode
>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>
>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>
>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>> would give an idea whether any SDIO
>>>>>>>> or just specific ones fail.
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>> regards
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>> configuration.
>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>
>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>
>>>>>>> The debug info was produced with following commad sequence
>>>>>>>  dmesg -n 8
>>>>>>>  dmesg -D
>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>  modprobe meson-gx-mmc
>>>>>>>  sleep 1
>>>>>>>  logger "loading brcmfmac"
>>>>>>>  modprobe brcmfmac
>>>>>>>  logger "modules loaded"
>>>>>>>  sleep 1
>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>
>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>
>>>>>>> because of the length of the files i removed most lines of the
>>>>>>> loading of meson-gx-mmc
>>>>>>>
>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>> i've always got 11 of them.
>>>>>>>  Only the timings differed with the applied patches
>>>>>>>
>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>> 400000 -> 52000000
>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>> 52000000 != actual rate 50000000
>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>   loading brcmfmac
>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>> available.
>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>> brcmf_sdiod_probe...
>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>> 1000 ms nsac 0
>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x21
>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>> data:0x00
>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>> 1000 ms nsac 0
>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>> BCM0, rev=0
>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>> supported
>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>> brcmf_chip_attach failed!
>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>> oob=0 sd=0
>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>> failed -19...
>>>>>>>
>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>> lines after the first CMD53)
>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>> 400000 -> 52000000
>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>> 52000000 != actual rate 50000000
>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>   loading brcmfmac
>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>> available.
>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>> brcmf_sdiod_probe...
>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>> 1000 ms nsac 0
>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>
>>>>>>> if you need more data: just ask ;-)
>>>>>>>
>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>> the actual register value.
>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>> send the log?
>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>> the issue.
>>>>>>
>>>>>> Rgds, Heiner
>>>>>>
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>
>>>>>> +            if (cmd->opcode == 53)
>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>> len);
>>>>>> +
>>>>>>              if (data->blocks > 1)
>>>>>>                  len /= data->blksz;
>>>>>>
>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>> *dev_id)
>>>>>>
>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>
>>>>>> +    if (cmd->opcode == 53)
>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>> host->descs[0].cmd_data);
>>>>>> +
>>>>>>      cmd->error = 0;
>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>
>>>>>
>>>>> here is the output:
>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>> nsac 0
>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>> 00000000
>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>> small read DMA returns
>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>
>>>> OK, one last attempt before I have to think about a better way to
>>>> tackle this issue.
>>>>
>>>> Could you please replace the last logging extension patch with this one?
>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>
>>>> Thanks, Heiner
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>> index ca685902..5b511944 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>              unsigned int len = sg_dma_len(sg);
>>>>
>>>> +            if (cmd->opcode == 53)
>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>> +
>>>>              if (data->blocks > 1)
>>>>                  len /= data->blksz;
>>>>
>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>> *dev_id)
>>>>
>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>
>>>> +    if (cmd->opcode == 53) {
>>>> +        dma_rmb();
>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>> +    }
>>>> +
>>>>      cmd->error = 0;
>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>
>>>
>>> the output is not really different (for the 2 cmd53)
>>> [   37.113577] sg: idx 0 len 4
>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>> [   37.114016] sg: idx 0 len 4
>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>
>>> Helmut
>>
>>
>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>
>> here are the patches
>>
>> for the fully operational version
>>
>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>
>>      /* data? */
>>      if (cmd->data) {
>> +
>> +        dev_dbg(host->dev, "DBG data");
>> +
>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>          if (cmd->data->blocks > 1) {
>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>      wmb(); /* ensure descriptor is written before kicked */
>> +
>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>> +
>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>  }
>>
>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>      status = raw_status & irq_en;
>>
>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>> +
>>      if (!status) {
>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>               raw_status, irq_en);
>>
>> and this is for the version with the sdio problem
>>
>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>      }
>>
>>      if (data) {
>> +
>> +        dev_dbg(host->dev, "DBG data");
>> +
>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>
>>          if (data->blocks > 1) {
>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>      host->cmd = cmd;
>>
>>      wmb(); /* ensure descriptor is written before kicked */
>> +
>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>> +
>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>      writel(cfg, host->regs + SD_EMMC_START);
>>  }
>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>      status = raw_status & irq_en;
>>
>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>> +
>>      if (!status) {
>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>               raw_status, irq_en);
>>
>> the filtered logs are identical up and including the 2nd cmd53.
>>
>> Helmut
>>
>>
> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
> either in the DMA subsystem or there's a hw bug causing issues with very small
> transfers. That's the only difference between SD/eMMC and SDIO on that level:
> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
> transfers.
>
> For up to 4 bytes the chip supports an alternative transfer method.
> Let's try this as workaround.
>
> Could you please apply:
> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index 4f9fafd3..cf9be13f 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>  		return NULL;
>  }
>
> +static bool meson_mmc_small_read(const struct mmc_data *data)
> +{
> +	return data && data->blocks <= 1 && data->blksz <= 4 &&
> +	       data->flags & MMC_DATA_READ;
> +}
> +
>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>  {
>  	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>  			       int err)
>  {
> +	struct meson_host *host = mmc_priv(mmc);
>  	struct mmc_data *data = mrq->data;
>
>  	if (data && data->sg_count)
>  		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>  			     meson_mmc_get_data_dir(data));
> +
> +	if (meson_mmc_small_read(data)) {
> +		int cnt;
> +
> +		dma_rmb();
> +		cnt = sg_copy_from_buffer(data->sg, data->sg_len,
> +				&host->descs[0].cmd_data, data->blksz);
> +		if (cnt != data->blksz)
> +			dev_err(host->dev, "error copying to scatterlist\n");
> +	}
>  }
>
>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  	}
>
>  	if (data) {
> +		bool small_read = meson_mmc_small_read(data);
> +
>  		cmd_cfg |= CMD_CFG_DATA_IO;
>
>  		if (data->blocks > 1) {
> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  			}
>  		}
>
> +		/*
> +		 * workaround for most likely hw bug
> +		 * if up to 4 bytes receive them in the descriptor instead
> +		 * of using dma_map_sg/dma_unmap_sg
> +		*/
> +		if (small_read)
> +			cmd_cfg |= CMD_CFG_DATA_NUM;
> +
>  		data->bytes_xfered = 0;
>  		if (data->flags & MMC_DATA_WRITE)
>  			cmd_cfg |= CMD_CFG_DATA_WR;
> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>  			desc[i].cmd_arg = cmd->arg;
>  			desc[i].cmd_resp = 0;
> -			desc[i].cmd_data = sg_dma_address(sg);
> +			desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>  		}
>  		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>
>

Hallo Heiner,

here is  the result:
[   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
[   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
[   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
[   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
[   44.375050] mmc0:     4 bytes transferred: 0
[   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
[   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330

[   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
[   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
[   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
[   44.375311] mmc0:     4 bytes transferred: 0
[   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< 
expected 0x16044330
[   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
[   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
[   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
[   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
[   44.375339] brcmfmac: brcmf_sdio_remove Enter

the 1. cmd53 returned the correct data.
the second one failed. 0x0 instead of 0x16044330 (the same value as in 
the 1. cmd53)

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 20.03.2017 20:54, Heiner Kallweit wrote:
> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>> On 20.03.2017 13:51, Helmut Klein wrote:
>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>
>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>
>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>
>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>
>>>>>>>>>>>>> But:
>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>
>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>
>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>> test feedback.
>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>
>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>
>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>
>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>
>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>> reader).
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>
>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>
>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>
>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>> failed <<<=====
>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>> image file download failed
>>>>>>>>>>>
>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>
>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>> failed -19...
>>>>>>>>>>>
>>>>>>>>>>> regards
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>> of the patch
>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>
>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>> the
>>>>>>>>>> following one and re-test?
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>> ---
>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>
>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>> +};
>>>>>>>>>> +
>>>>>>>>>>  struct meson_host {
>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>
>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>
>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>  };
>>>>>>>>>>
>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>> -};
>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>> +{
>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>> +
>>>>>>>>>> +    if (!data)
>>>>>>>>>> +        return;
>>>>>>>>>> +
>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>> +
>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>> data->sg_len,
>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>> +                   int err)
>>>>>>>>>> +{
>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>> +
>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>> long clk_rate)
>>>>>>>>>>  {
>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>> -    u32 cfg;
>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>> +    int i;
>>>>>>>>>>
>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>      dma_rmb();
>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>
>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>
>>>>>>>>>>      /* Response */
>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>
>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>
>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>      } else {
>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>> -    /* data? */
>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>> +    if (data) {
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>> +
>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>
>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>> %d\n",
>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>              }
>>>>>>>>>> -        } else {
>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>> -            dma_wmb();
>>>>>>>>>> -        } else {
>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>> -        }
>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>
>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>> +
>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>> +
>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>> +
>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>> +            if (i > 0)
>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +        }
>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>      } else {
>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>      }
>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>
>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>
>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>> +
>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>
>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>      else
>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>> +
>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>> void *dev_id)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>
>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>> void *dev_id)
>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>
>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>> +
>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>> void *dev_id)
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>      }
>>>>>>>>>> +
>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>> +
>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>
>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>> -    else  {
>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>> +    } else  {
>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>  {
>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>
>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>
>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>> -    }
>>>>>>>>>> -
>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>> -    else
>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>
>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>  }
>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>  };
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>
>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>> -
>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>> buffer.\n");
>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>> +
>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>> failed\n");
>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>      }
>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>
>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>
>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>
>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>> understand why SD and eMMC mode
>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>
>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>
>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>> would give an idea whether any SDIO
>>>>>>>> or just specific ones fail.
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>> regards
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>> configuration.
>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>
>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>
>>>>>>> The debug info was produced with following commad sequence
>>>>>>>  dmesg -n 8
>>>>>>>  dmesg -D
>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>  modprobe meson-gx-mmc
>>>>>>>  sleep 1
>>>>>>>  logger "loading brcmfmac"
>>>>>>>  modprobe brcmfmac
>>>>>>>  logger "modules loaded"
>>>>>>>  sleep 1
>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>
>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>
>>>>>>> because of the length of the files i removed most lines of the
>>>>>>> loading of meson-gx-mmc
>>>>>>>
>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>> i've always got 11 of them.
>>>>>>>  Only the timings differed with the applied patches
>>>>>>>
>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>> timeout
>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>> 400000 -> 52000000
>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>> 52000000 != actual rate 50000000
>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>   loading brcmfmac
>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>> available.
>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>> brcmf_sdiod_probe...
>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>> 1000 ms nsac 0
>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x21
>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>> data:0x00
>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>> 1000 ms nsac 0
>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>> BCM0, rev=0
>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>> supported
>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>> brcmf_chip_attach failed!
>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>> oob=0 sd=0
>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>> failed -19...
>>>>>>>
>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>> lines after the first CMD53)
>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>> 400000 -> 52000000
>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>> 52000000 != actual rate 50000000
>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>   loading brcmfmac
>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>> available.
>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>> brcmf_sdiod_probe...
>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>> 1000 ms nsac 0
>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>> 00000000 00000000
>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>> data:0x28
>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>
>>>>>>> if you need more data: just ask ;-)
>>>>>>>
>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>> the actual register value.
>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>> send the log?
>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>> the issue.
>>>>>>
>>>>>> Rgds, Heiner
>>>>>>
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>
>>>>>> +            if (cmd->opcode == 53)
>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>> len);
>>>>>> +
>>>>>>              if (data->blocks > 1)
>>>>>>                  len /= data->blksz;
>>>>>>
>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>> *dev_id)
>>>>>>
>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>
>>>>>> +    if (cmd->opcode == 53)
>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>> host->descs[0].cmd_data);
>>>>>> +
>>>>>>      cmd->error = 0;
>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>
>>>>>
>>>>> here is the output:
>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>> nsac 0
>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>> 00000000
>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>> small read DMA returns
>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>
>>>> OK, one last attempt before I have to think about a better way to
>>>> tackle this issue.
>>>>
>>>> Could you please replace the last logging extension patch with this one?
>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>
>>>> Thanks, Heiner
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>> index ca685902..5b511944 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>              unsigned int len = sg_dma_len(sg);
>>>>
>>>> +            if (cmd->opcode == 53)
>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>> +
>>>>              if (data->blocks > 1)
>>>>                  len /= data->blksz;
>>>>
>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>> *dev_id)
>>>>
>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>
>>>> +    if (cmd->opcode == 53) {
>>>> +        dma_rmb();
>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>> +    }
>>>> +
>>>>      cmd->error = 0;
>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>
>>>
>>> the output is not really different (for the 2 cmd53)
>>> [   37.113577] sg: idx 0 len 4
>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>> [   37.114016] sg: idx 0 len 4
>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>
>>> Helmut
>>
>>
>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>
>> here are the patches
>>
>> for the fully operational version
>>
>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>
>>      /* data? */
>>      if (cmd->data) {
>> +
>> +        dev_dbg(host->dev, "DBG data");
>> +
>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>          if (cmd->data->blocks > 1) {
>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>      wmb(); /* ensure descriptor is written before kicked */
>> +
>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>> +
>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>  }
>>
>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>      status = raw_status & irq_en;
>>
>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>> +
>>      if (!status) {
>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>               raw_status, irq_en);
>>
>> and this is for the version with the sdio problem
>>
>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>      }
>>
>>      if (data) {
>> +
>> +        dev_dbg(host->dev, "DBG data");
>> +
>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>
>>          if (data->blocks > 1) {
>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>      host->cmd = cmd;
>>
>>      wmb(); /* ensure descriptor is written before kicked */
>> +
>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>> +
>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>      writel(cfg, host->regs + SD_EMMC_START);
>>  }
>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>      status = raw_status & irq_en;
>>
>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>> +
>>      if (!status) {
>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>               raw_status, irq_en);
>>
>> the filtered logs are identical up and including the 2nd cmd53.
>>
>> Helmut
>>
>>
> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
> either in the DMA subsystem or there's a hw bug causing issues with very small
> transfers. That's the only difference between SD/eMMC and SDIO on that level:
> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
> transfers.
>
> For up to 4 bytes the chip supports an alternative transfer method.
> Let's try this as workaround.
>
> Could you please apply:
> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index 4f9fafd3..cf9be13f 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>  		return NULL;
>  }
>
> +static bool meson_mmc_small_read(const struct mmc_data *data)
> +{
> +	return data && data->blocks <= 1 && data->blksz <= 4 &&
> +	       data->flags & MMC_DATA_READ;
> +}
> +
>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>  {
>  	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>  			       int err)
>  {
> +	struct meson_host *host = mmc_priv(mmc);
>  	struct mmc_data *data = mrq->data;
>
>  	if (data && data->sg_count)
>  		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>  			     meson_mmc_get_data_dir(data));
> +
> +	if (meson_mmc_small_read(data)) {
> +		int cnt;
> +
> +		dma_rmb();
> +		cnt = sg_copy_from_buffer(data->sg, data->sg_len,
> +				&host->descs[0].cmd_data, data->blksz);
> +		if (cnt != data->blksz)
> +			dev_err(host->dev, "error copying to scatterlist\n");
> +	}
>  }
>
>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  	}
>
>  	if (data) {
> +		bool small_read = meson_mmc_small_read(data);
> +
>  		cmd_cfg |= CMD_CFG_DATA_IO;
>
>  		if (data->blocks > 1) {
> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  			}
>  		}
>
> +		/*
> +		 * workaround for most likely hw bug
> +		 * if up to 4 bytes receive them in the descriptor instead
> +		 * of using dma_map_sg/dma_unmap_sg
> +		*/
> +		if (small_read)
> +			cmd_cfg |= CMD_CFG_DATA_NUM;
> +
>  		data->bytes_xfered = 0;
>  		if (data->flags & MMC_DATA_WRITE)
>  			cmd_cfg |= CMD_CFG_DATA_WR;
> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>  			desc[i].cmd_arg = cmd->arg;
>  			desc[i].cmd_resp = 0;
> -			desc[i].cmd_data = sg_dma_address(sg);
> +			desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>  		}
>  		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>
>

Hallo Heiner,

here is  the result:
[   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, 
addr=0x08000, nbytes=4
[   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
[   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
[   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
[   44.375050] mmc0:     4 bytes transferred: 0
[   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
[   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330

[   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
[   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
[   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 
00000000
[   44.375311] mmc0:     4 bytes transferred: 0
[   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< 
expected 0x16044330
[   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
[   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
[   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
[   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
[   44.375339] brcmfmac: brcmf_sdio_remove Enter

the 1. cmd53 returned the correct data.
the second one failed. 0x0 instead of 0x16044330 (the same value as in 
the 1. cmd53)

Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 22.03.2017 um 11:09 schrieb Helmut Klein:
> On 20.03.2017 20:54, Heiner Kallweit wrote:
>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>
>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>
>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>
>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>
>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>
>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>> reader).
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>
>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>
>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>> of the patch
>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>
>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>> the
>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>> ---
>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>
>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>> +};
>>>>>>>>>>> +
>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>
>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>
>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>> -};
>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>          return NULL;
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>> +{
>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (!data)
>>>>>>>>>>> +        return;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>> data->sg_len,
>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>> +                   int err)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>> +    int i;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>
>>>>>>>>>>>      /* Response */
>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>
>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>> -    /* data? */
>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +    if (data) {
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> +
>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>
>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>> %d\n",
>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              }
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>          }
>>>>>>>>>>>
>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>> -        }
>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>
>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +
>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>> +
>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>> +
>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>> +        }
>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>      }
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>
>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>      else
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>
>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>> +
>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>      }
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>> +
>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>
>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> -    else  {
>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> +    } else  {
>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -    }
>>>>>>>>>>> -
>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>> -    else
>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>
>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>
>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> -
>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>> buffer.\n");
>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>> +
>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>> failed\n");
>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>      }
>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>
>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>
>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>
>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>
>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>
>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>> or just specific ones fail.
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>> configuration.
>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>
>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>
>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>  dmesg -n 8
>>>>>>>>  dmesg -D
>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>  sleep 1
>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>  modprobe brcmfmac
>>>>>>>>  logger "modules loaded"
>>>>>>>>  sleep 1
>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>
>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>
>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>> loading of meson-gx-mmc
>>>>>>>>
>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>> i've always got 11 of them.
>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>
>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x21
>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>> data:0x00
>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>> BCM0, rev=0
>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>> oob=0 sd=0
>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>> failed -19...
>>>>>>>>
>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>> lines after the first CMD53)
>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>
>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>
>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>> the actual register value.
>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>> send the log?
>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>> the issue.
>>>>>>>
>>>>>>> Rgds, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>> len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53)
>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>> host->descs[0].cmd_data);
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> here is the output:
>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>> small read DMA returns
>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>
>>>>> OK, one last attempt before I have to think about a better way to
>>>>> tackle this issue.
>>>>>
>>>>> Could you please replace the last logging extension patch with this one?
>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index ca685902..5b511944 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>
>>>>> +            if (cmd->opcode == 53)
>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>> +
>>>>>              if (data->blocks > 1)
>>>>>                  len /= data->blksz;
>>>>>
>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>> *dev_id)
>>>>>
>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>
>>>>> +    if (cmd->opcode == 53) {
>>>>> +        dma_rmb();
>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>> +    }
>>>>> +
>>>>>      cmd->error = 0;
>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>
>>>>
>>>> the output is not really different (for the 2 cmd53)
>>>> [   37.113577] sg: idx 0 len 4
>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>> [   37.114016] sg: idx 0 len 4
>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>
>>>> Helmut
>>>
>>>
>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>
>>> here are the patches
>>>
>>> for the fully operational version
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>
>>>      /* data? */
>>>      if (cmd->data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>          if (cmd->data->blocks > 1) {
>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>> +
>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>  }
>>>
>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> and this is for the version with the sdio problem
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>      }
>>>
>>>      if (data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>
>>>          if (data->blocks > 1) {
>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>      host->cmd = cmd;
>>>
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>> +
>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>  }
>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> the filtered logs are identical up and including the 2nd cmd53.
>>>
>>> Helmut
>>>
>>>
>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>> either in the DMA subsystem or there's a hw bug causing issues with very small
>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>> transfers.
>>
>> For up to 4 bytes the chip supports an alternative transfer method.
>> Let's try this as workaround.
>>
>> Could you please apply:
>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 4f9fafd3..cf9be13f 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>          return NULL;
>>  }
>>
>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>> +{
>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>> +           data->flags & MMC_DATA_READ;
>> +}
>> +
>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>  {
>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>                     int err)
>>  {
>> +    struct meson_host *host = mmc_priv(mmc);
>>      struct mmc_data *data = mrq->data;
>>
>>      if (data && data->sg_count)
>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>                   meson_mmc_get_data_dir(data));
>> +
>> +    if (meson_mmc_small_read(data)) {
>> +        int cnt;
>> +
>> +        dma_rmb();
>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>> +                &host->descs[0].cmd_data, data->blksz);
>> +        if (cnt != data->blksz)
>> +            dev_err(host->dev, "error copying to scatterlist\n");
>> +    }
>>  }
>>
>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>      }
>>
>>      if (data) {
>> +        bool small_read = meson_mmc_small_read(data);
>> +
>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>
>>          if (data->blocks > 1) {
>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>              }
>>          }
>>
>> +        /*
>> +         * workaround for most likely hw bug
>> +         * if up to 4 bytes receive them in the descriptor instead
>> +         * of using dma_map_sg/dma_unmap_sg
>> +        */
>> +        if (small_read)
>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>> +
>>          data->bytes_xfered = 0;
>>          if (data->flags & MMC_DATA_WRITE)
>>              cmd_cfg |= CMD_CFG_DATA_WR;
>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>              desc[i].cmd_arg = cmd->arg;
>>              desc[i].cmd_resp = 0;
>> -            desc[i].cmd_data = sg_dma_address(sg);
>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>          }
>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>
>>
> 
> Hallo Heiner,
> 
> here is  the result:
> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375050] mmc0:     4 bytes transferred: 0
> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
> 
> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375311] mmc0:     4 bytes transferred: 0
> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
> 
> the 1. cmd53 returned the correct data.
> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
> 
Thanks again for your testing efforts. Then I'll do the following:
I will keep the old single-descriptor / bounce-buffer mode for smaller transfers and
use descriptor-chain mode only for bigger multi-block transfers.

Before these functional changes I think there will be one more round with smaller
refactorings.

Thanks, Heiner

> Helmut
> 

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 22.03.2017 um 11:09 schrieb Helmut Klein:
> On 20.03.2017 20:54, Heiner Kallweit wrote:
>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>
>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>
>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>
>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>
>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>
>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>> reader).
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>
>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>
>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>> of the patch
>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>
>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>> the
>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>> ---
>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>
>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>> +};
>>>>>>>>>>> +
>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>
>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>
>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>> -};
>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>          return NULL;
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>> +{
>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (!data)
>>>>>>>>>>> +        return;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>> data->sg_len,
>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>> +                   int err)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>> +    int i;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>
>>>>>>>>>>>      /* Response */
>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>
>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>> -    /* data? */
>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +    if (data) {
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> +
>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>
>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>> %d\n",
>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              }
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>          }
>>>>>>>>>>>
>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>> -        }
>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>
>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +
>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>> +
>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>> +
>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>> +        }
>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>      }
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>
>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>      else
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>
>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>> +
>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>      }
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>> +
>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>
>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> -    else  {
>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> +    } else  {
>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -    }
>>>>>>>>>>> -
>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>> -    else
>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>
>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>
>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> -
>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>> buffer.\n");
>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>> +
>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>> failed\n");
>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>      }
>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>
>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>
>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>
>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>
>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>
>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>> or just specific ones fail.
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>> configuration.
>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>
>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>
>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>  dmesg -n 8
>>>>>>>>  dmesg -D
>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>  sleep 1
>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>  modprobe brcmfmac
>>>>>>>>  logger "modules loaded"
>>>>>>>>  sleep 1
>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>
>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>
>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>> loading of meson-gx-mmc
>>>>>>>>
>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>> i've always got 11 of them.
>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>
>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x21
>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>> data:0x00
>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>> BCM0, rev=0
>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>> oob=0 sd=0
>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>> failed -19...
>>>>>>>>
>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>> lines after the first CMD53)
>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>
>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>
>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>> the actual register value.
>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>> send the log?
>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>> the issue.
>>>>>>>
>>>>>>> Rgds, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>> len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53)
>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>> host->descs[0].cmd_data);
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> here is the output:
>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>> small read DMA returns
>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>
>>>>> OK, one last attempt before I have to think about a better way to
>>>>> tackle this issue.
>>>>>
>>>>> Could you please replace the last logging extension patch with this one?
>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index ca685902..5b511944 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>
>>>>> +            if (cmd->opcode == 53)
>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>> +
>>>>>              if (data->blocks > 1)
>>>>>                  len /= data->blksz;
>>>>>
>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>> *dev_id)
>>>>>
>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>
>>>>> +    if (cmd->opcode == 53) {
>>>>> +        dma_rmb();
>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>> +    }
>>>>> +
>>>>>      cmd->error = 0;
>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>
>>>>
>>>> the output is not really different (for the 2 cmd53)
>>>> [   37.113577] sg: idx 0 len 4
>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>> [   37.114016] sg: idx 0 len 4
>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>
>>>> Helmut
>>>
>>>
>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>
>>> here are the patches
>>>
>>> for the fully operational version
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>
>>>      /* data? */
>>>      if (cmd->data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>          if (cmd->data->blocks > 1) {
>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>> +
>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>  }
>>>
>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> and this is for the version with the sdio problem
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>      }
>>>
>>>      if (data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>
>>>          if (data->blocks > 1) {
>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>      host->cmd = cmd;
>>>
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>> +
>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>  }
>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> the filtered logs are identical up and including the 2nd cmd53.
>>>
>>> Helmut
>>>
>>>
>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>> either in the DMA subsystem or there's a hw bug causing issues with very small
>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>> transfers.
>>
>> For up to 4 bytes the chip supports an alternative transfer method.
>> Let's try this as workaround.
>>
>> Could you please apply:
>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 4f9fafd3..cf9be13f 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>          return NULL;
>>  }
>>
>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>> +{
>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>> +           data->flags & MMC_DATA_READ;
>> +}
>> +
>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>  {
>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>                     int err)
>>  {
>> +    struct meson_host *host = mmc_priv(mmc);
>>      struct mmc_data *data = mrq->data;
>>
>>      if (data && data->sg_count)
>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>                   meson_mmc_get_data_dir(data));
>> +
>> +    if (meson_mmc_small_read(data)) {
>> +        int cnt;
>> +
>> +        dma_rmb();
>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>> +                &host->descs[0].cmd_data, data->blksz);
>> +        if (cnt != data->blksz)
>> +            dev_err(host->dev, "error copying to scatterlist\n");
>> +    }
>>  }
>>
>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>      }
>>
>>      if (data) {
>> +        bool small_read = meson_mmc_small_read(data);
>> +
>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>
>>          if (data->blocks > 1) {
>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>              }
>>          }
>>
>> +        /*
>> +         * workaround for most likely hw bug
>> +         * if up to 4 bytes receive them in the descriptor instead
>> +         * of using dma_map_sg/dma_unmap_sg
>> +        */
>> +        if (small_read)
>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>> +
>>          data->bytes_xfered = 0;
>>          if (data->flags & MMC_DATA_WRITE)
>>              cmd_cfg |= CMD_CFG_DATA_WR;
>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>              desc[i].cmd_arg = cmd->arg;
>>              desc[i].cmd_resp = 0;
>> -            desc[i].cmd_data = sg_dma_address(sg);
>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>          }
>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>
>>
> 
> Hallo Heiner,
> 
> here is  the result:
> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375050] mmc0:     4 bytes transferred: 0
> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
> 
> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375311] mmc0:     4 bytes transferred: 0
> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
> 
> the 1. cmd53 returned the correct data.
> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
> 
Thanks again for your testing efforts. Then I'll do the following:
I will keep the old single-descriptor / bounce-buffer mode for smaller transfers and
use descriptor-chain mode only for bigger multi-block transfers.

Before these functional changes I think there will be one more round with smaller
refactorings.

Thanks, Heiner

> Helmut
> 

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

[-- Attachment #1: Type: text/plain, Size: 60581 bytes --]

Am 22.03.2017 um 11:09 schrieb Helmut Klein:
> On 20.03.2017 20:54, Heiner Kallweit wrote:
>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>
>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>
>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>
>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>
>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>
>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>> reader).
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>
>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>
>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>> of the patch
>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>
>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>> the
>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>> ---
>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>
>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>> +};
>>>>>>>>>>> +
>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>
>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>
>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>> -};
>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>          return NULL;
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>> +{
>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (!data)
>>>>>>>>>>> +        return;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>> data->sg_len,
>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>> +                   int err)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>> +    int i;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>
>>>>>>>>>>>      /* Response */
>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>
>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>> -    /* data? */
>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +    if (data) {
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> +
>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>
>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>> %d\n",
>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              }
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>          }
>>>>>>>>>>>
>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>> -        }
>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>
>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +
>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>> +
>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>> +
>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>> +        }
>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>      }
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>
>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>      else
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>
>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>> +
>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>      }
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>> +
>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>
>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> -    else  {
>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> +    } else  {
>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -    }
>>>>>>>>>>> -
>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>> -    else
>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>
>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>
>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> -
>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>> buffer.\n");
>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>> +
>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>> failed\n");
>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>      }
>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>
>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>
>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>
>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>
>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>
>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>> or just specific ones fail.
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>> configuration.
>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>
>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>
>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>  dmesg -n 8
>>>>>>>>  dmesg -D
>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>  sleep 1
>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>  modprobe brcmfmac
>>>>>>>>  logger "modules loaded"
>>>>>>>>  sleep 1
>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>
>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>
>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>> loading of meson-gx-mmc
>>>>>>>>
>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>> i've always got 11 of them.
>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>
>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x21
>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>> data:0x00
>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>> BCM0, rev=0
>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>> oob=0 sd=0
>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>> failed -19...
>>>>>>>>
>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>> lines after the first CMD53)
>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>
>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>
>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>> the actual register value.
>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>> send the log?
>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>> the issue.
>>>>>>>
>>>>>>> Rgds, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>> len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53)
>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>> host->descs[0].cmd_data);
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> here is the output:
>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>> small read DMA returns
>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>
>>>>> OK, one last attempt before I have to think about a better way to
>>>>> tackle this issue.
>>>>>
>>>>> Could you please replace the last logging extension patch with this one?
>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index ca685902..5b511944 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>
>>>>> +            if (cmd->opcode == 53)
>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>> +
>>>>>              if (data->blocks > 1)
>>>>>                  len /= data->blksz;
>>>>>
>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>> *dev_id)
>>>>>
>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>
>>>>> +    if (cmd->opcode == 53) {
>>>>> +        dma_rmb();
>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>> +    }
>>>>> +
>>>>>      cmd->error = 0;
>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>
>>>>
>>>> the output is not really different (for the 2 cmd53)
>>>> [   37.113577] sg: idx 0 len 4
>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>> [   37.114016] sg: idx 0 len 4
>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>
>>>> Helmut
>>>
>>>
>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>
>>> here are the patches
>>>
>>> for the fully operational version
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>
>>>      /* data? */
>>>      if (cmd->data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>          if (cmd->data->blocks > 1) {
>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>> +
>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>  }
>>>
>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> and this is for the version with the sdio problem
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>      }
>>>
>>>      if (data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>
>>>          if (data->blocks > 1) {
>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>      host->cmd = cmd;
>>>
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>> +
>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>  }
>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> the filtered logs are identical up and including the 2nd cmd53.
>>>
>>> Helmut
>>>
>>>
>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>> either in the DMA subsystem or there's a hw bug causing issues with very small
>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>> transfers.
>>
>> For up to 4 bytes the chip supports an alternative transfer method.
>> Let's try this as workaround.
>>
>> Could you please apply:
>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 4f9fafd3..cf9be13f 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>          return NULL;
>>  }
>>
>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>> +{
>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>> +           data->flags & MMC_DATA_READ;
>> +}
>> +
>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>  {
>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>                     int err)
>>  {
>> +    struct meson_host *host = mmc_priv(mmc);
>>      struct mmc_data *data = mrq->data;
>>
>>      if (data && data->sg_count)
>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>                   meson_mmc_get_data_dir(data));
>> +
>> +    if (meson_mmc_small_read(data)) {
>> +        int cnt;
>> +
>> +        dma_rmb();
>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>> +                &host->descs[0].cmd_data, data->blksz);
>> +        if (cnt != data->blksz)
>> +            dev_err(host->dev, "error copying to scatterlist\n");
>> +    }
>>  }
>>
>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>      }
>>
>>      if (data) {
>> +        bool small_read = meson_mmc_small_read(data);
>> +
>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>
>>          if (data->blocks > 1) {
>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>              }
>>          }
>>
>> +        /*
>> +         * workaround for most likely hw bug
>> +         * if up to 4 bytes receive them in the descriptor instead
>> +         * of using dma_map_sg/dma_unmap_sg
>> +        */
>> +        if (small_read)
>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>> +
>>          data->bytes_xfered = 0;
>>          if (data->flags & MMC_DATA_WRITE)
>>              cmd_cfg |= CMD_CFG_DATA_WR;
>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>              desc[i].cmd_arg = cmd->arg;
>>              desc[i].cmd_resp = 0;
>> -            desc[i].cmd_data = sg_dma_address(sg);
>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>          }
>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>
>>
> 
> Hallo Heiner,
> 
> here is  the result:
> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375050] mmc0:     4 bytes transferred: 0
> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
> 
> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375311] mmc0:     4 bytes transferred: 0
> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
> 
> the 1. cmd53 returned the correct data.
> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
> 
> Helmut
> 

Hallo Helmut,

next attempt .. After some more analysis I suspect a bug in SDIO core regarding a not
properly aligned buffer (not aligned on 8 byte boundary what is needed for 64 bit DMA).

I'd appreciate if you could test attached four patches on top of latest next kernel.
Patches 1 + 2: smaller refactorings which have been submitted already but are not applied yet
Patch 3: Fix for suspected issue in SDIO core
Patch 4: Switch to descriptor chain mode

By the way, if you go with latest next kernel:
STMMAC ethernet driver is broken currently, I had to go back to version from March 10th.

Thanks in advance,
Heiner


[-- Attachment #2: 0001-factor-out-set-blksz.patch --]
[-- Type: text/x-diff, Size: 2462 bytes --]

>From 24a33649061c56613955983b133b381c1cfc84fc Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sun, 26 Mar 2017 17:37:00 +0200
Subject: [PATCH 1/4] factor out set blksz

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 42 ++++++++++++++++++++++++++---------------
 1 file changed, 27 insertions(+), 15 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index f5dd5cc7..0de32008 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -431,12 +431,36 @@ static void meson_mmc_request_done(struct mmc_host *mmc,
 	mmc_request_done(host->mmc, mrq);
 }
 
+static void meson_mmc_set_blksz(struct mmc_host *mmc, unsigned int blksz)
+{
+	struct meson_host *host = mmc_priv(mmc);
+	u32 cfg, blksz_old;
+
+	cfg = readl(host->regs + SD_EMMC_CFG);
+	blksz_old = FIELD_GET(CFG_BLK_LEN_MASK, cfg);
+
+	if (!is_power_of_2(blksz))
+		dev_err(host->dev, "blksz %u is not a power of 2\n", blksz);
+
+	blksz = ilog2(blksz);
+
+	/* check if block-size matches, if not update */
+	if (blksz == blksz_old)
+		return;
+
+	dev_dbg(host->dev, "%s: update blk_len %d -> %d\n", __func__,
+		blksz_old, blksz);
+
+	cfg &= ~CFG_BLK_LEN_MASK;
+	cfg |= FIELD_PREP(CFG_BLK_LEN_MASK, blksz);
+	writel(cfg, host->regs + SD_EMMC_CFG);
+}
+
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
 	struct mmc_data *data = cmd->data;
-	u32 cfg, cmd_cfg = 0, cmd_data = 0;
-	u8 blk_len;
+	u32 cmd_cfg = 0, cmd_data = 0;
 	unsigned int xfer_bytes = 0;
 
 	/* Setup descriptors */
@@ -470,19 +494,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 			cmd_cfg |= CMD_CFG_BLOCK_MODE;
 			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK,
 					      data->blocks);
-
-			/* check if block-size matches, if not update */
-			cfg = readl(host->regs + SD_EMMC_CFG);
-			blk_len = FIELD_GET(CFG_BLK_LEN_MASK, cfg);
-			if (blk_len != ilog2(data->blksz)) {
-				dev_dbg(host->dev, "%s: update blk_len %d -> %d\n",
-					__func__, blk_len,
-					ilog2(data->blksz));
-				blk_len = ilog2(data->blksz);
-				cfg &= ~CFG_BLK_LEN_MASK;
-				cfg |= FIELD_PREP(CFG_BLK_LEN_MASK, blk_len);
-				writel(cfg, host->regs + SD_EMMC_CFG);
-			}
+			meson_mmc_set_blksz(mmc, data->blksz);
 		} else {
 			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK, data->blksz);
 		}
-- 
2.12.1


[-- Attachment #3: 0002-factor-out-setting-response-bits.patch --]
[-- Type: text/x-diff, Size: 1893 bytes --]

>From 86b1374413af88de7f3e98c072a474ae81956bef Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sun, 26 Mar 2017 17:57:09 +0200
Subject: [PATCH 2/4] factor out setting response bits

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 0de32008..0036680b 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -456,6 +456,23 @@ static void meson_mmc_set_blksz(struct mmc_host *mmc, unsigned int blksz)
 	writel(cfg, host->regs + SD_EMMC_CFG);
 }
 
+static void meson_mmc_set_response_bits(struct mmc_command *cmd, u32 *cmd_cfg)
+{
+	if (cmd->flags & MMC_RSP_PRESENT) {
+		if (cmd->flags & MMC_RSP_136)
+			*cmd_cfg |= CMD_CFG_RESP_128;
+		*cmd_cfg |= CMD_CFG_RESP_NUM;
+
+		if (!(cmd->flags & MMC_RSP_CRC))
+			*cmd_cfg |= CMD_CFG_RESP_NOCRC;
+
+		if (cmd->flags & MMC_RSP_BUSY)
+			*cmd_cfg |= CMD_CFG_R1B;
+	} else {
+		*cmd_cfg |= CMD_CFG_NO_RESP;
+	}
+}
+
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
@@ -469,20 +486,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 	cmd_cfg |= FIELD_PREP(CMD_CFG_CMD_INDEX_MASK, cmd->opcode);
 	cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
 
-	/* Response */
-	if (cmd->flags & MMC_RSP_PRESENT) {
-		if (cmd->flags & MMC_RSP_136)
-			cmd_cfg |= CMD_CFG_RESP_128;
-		cmd_cfg |= CMD_CFG_RESP_NUM;
-
-		if (!(cmd->flags & MMC_RSP_CRC))
-			cmd_cfg |= CMD_CFG_RESP_NOCRC;
-
-		if (cmd->flags & MMC_RSP_BUSY)
-			cmd_cfg |= CMD_CFG_R1B;
-	} else {
-		cmd_cfg |= CMD_CFG_NO_RESP;
-	}
+	meson_mmc_set_response_bits(cmd, &cmd_cfg);
 
 	/* data? */
 	if (data) {
-- 
2.12.1


[-- Attachment #4: 0003-fix-sdio.patch --]
[-- Type: text/x-diff, Size: 1651 bytes --]

>From 7a12460466035b605ec311ff0b8bcd1cd1844e28 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Tue, 28 Mar 2017 20:21:13 +0200
Subject: [PATCH 3/4] fix sdio

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/core/sdio_bus.c   | 12 +++++++++++-
 include/linux/mmc/sdio_func.h |  2 +-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index e992a7f8..2b32b889 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -267,7 +267,7 @@ static void sdio_release_func(struct device *dev)
 	sdio_free_func_cis(func);
 
 	kfree(func->info);
-
+	kfree(func->tmpbuf);
 	kfree(func);
 }
 
@@ -282,6 +282,16 @@ struct sdio_func *sdio_alloc_func(struct mmc_card *card)
 	if (!func)
 		return ERR_PTR(-ENOMEM);
 
+	/*
+	 * allocate buffer separately to make sure it's properly aligned for
+	 * DMA usage (incl. 64 bit DMA)
+	 */
+	func->tmpbuf = kmalloc(4, GFP_KERNEL);
+	if (!func->tmpbuf) {
+		kfree(func);
+		return ERR_PTR(-ENOMEM);
+	}
+
 	func->card = card;
 
 	device_initialize(&func->dev);
diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h
index aab032a6..97ca1053 100644
--- a/include/linux/mmc/sdio_func.h
+++ b/include/linux/mmc/sdio_func.h
@@ -53,7 +53,7 @@ struct sdio_func {
 	unsigned int		state;		/* function state */
 #define SDIO_STATE_PRESENT	(1<<0)		/* present in sysfs */
 
-	u8			tmpbuf[4];	/* DMA:able scratch buffer */
+	u8			*tmpbuf;	/* DMA:able scratch buffer */
 
 	unsigned		num_info;	/* number of info strings */
 	const char		**info;		/* info strings */
-- 
2.12.1


[-- Attachment #5: 0004-change-to-desc-chain-mode.patch --]
[-- Type: text/x-diff, Size: 8287 bytes --]

>From 3433341319cab08552ab7c8225bcf3b6c4770a02 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Tue, 28 Mar 2017 21:05:53 +0200
Subject: [PATCH 4/4] change to desc chain mode

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 143 ++++++++++++++++++++++++----------------
 1 file changed, 87 insertions(+), 56 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 0036680b..1a64cb91 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -109,8 +109,16 @@
 #define SD_EMMC_CMD_TIMEOUT 1024 /* in ms */
 #define SD_EMMC_CMD_TIMEOUT_DATA 4096 /* in ms */
 #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
+#define SD_EMMC_DESC_BUF_LEN PAGE_SIZE
 #define MUX_CLK_NUM_PARENTS 2
 
+struct sd_emmc_desc {
+	u32 cmd_cfg;
+	u32 cmd_arg;
+	u32 cmd_data;
+	u32 cmd_resp;
+};
+
 struct meson_host {
 	struct	device		*dev;
 	struct	mmc_host	*mmc;
@@ -126,20 +134,12 @@ struct meson_host {
 	struct clk_divider cfg_div;
 	struct clk *cfg_div_clk;
 
-	unsigned int bounce_buf_size;
-	void *bounce_buf;
-	dma_addr_t bounce_dma_addr;
+	struct sd_emmc_desc *descs;
+	dma_addr_t descs_dma_addr;
 
 	bool vqmmc_enabled;
 };
 
-struct sd_emmc_desc {
-	u32 cmd_cfg;
-	u32 cmd_arg;
-	u32 cmd_data;
-	u32 cmd_resp;
-};
-
 #define CMD_CFG_LENGTH_MASK GENMASK(8, 0)
 #define CMD_CFG_BLOCK_MODE BIT(9)
 #define CMD_CFG_R1B BIT(10)
@@ -186,6 +186,31 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
 		return NULL;
 }
 
+static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct mmc_data *data = mrq->data;
+
+	if (!data)
+		return;
+
+	data->host_cookie = true;
+
+	data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len,
+				    mmc_get_dma_dir(data));
+	if (!data->sg_count)
+		dev_err(mmc_dev(mmc), "dma_map_sg failed");
+}
+
+static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
+			       int err)
+{
+	struct mmc_data *data = mrq->data;
+
+	if (data && data->sg_count)
+		dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
+			     mmc_get_dma_dir(data));
+}
+
 static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
 {
 	struct mmc_host *mmc = host->mmc;
@@ -476,9 +501,11 @@ static void meson_mmc_set_response_bits(struct mmc_command *cmd, u32 *cmd_cfg)
 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct meson_host *host = mmc_priv(mmc);
+	struct sd_emmc_desc *desc = host->descs;
 	struct mmc_data *data = cmd->data;
-	u32 cmd_cfg = 0, cmd_data = 0;
-	unsigned int xfer_bytes = 0;
+	u32 cfg, cmd_cfg = 0;
+	struct scatterlist *sg;
+	int i;
 
 	/* Setup descriptors */
 	dma_rmb();
@@ -490,57 +517,68 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
 
 	/* data? */
 	if (data) {
+		data->bytes_xfered = 0;
 		cmd_cfg |= CMD_CFG_DATA_IO;
 		cmd_cfg |= FIELD_PREP(CMD_CFG_TIMEOUT_MASK,
 				      ilog2(meson_mmc_get_timeout_msecs(data)));
+		if (data->flags & MMC_DATA_WRITE)
+			cmd_cfg |= CMD_CFG_DATA_WR;
 
 		if (data->blocks > 1) {
 			cmd_cfg |= CMD_CFG_BLOCK_MODE;
-			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK,
-					      data->blocks);
 			meson_mmc_set_blksz(mmc, data->blksz);
-		} else {
-			cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK, data->blksz);
 		}
 
-		data->bytes_xfered = 0;
-		xfer_bytes = data->blksz * data->blocks;
-		if (data->flags & MMC_DATA_WRITE) {
-			cmd_cfg |= CMD_CFG_DATA_WR;
-			WARN_ON(xfer_bytes > host->bounce_buf_size);
-			sg_copy_to_buffer(data->sg, data->sg_len,
-					  host->bounce_buf, xfer_bytes);
-			dma_wmb();
-		}
+		for_each_sg(data->sg, sg, data->sg_count, i) {
+			unsigned int len = sg_dma_len(sg);
+
+			/* check proper alignment for 64 bit DMA */
+			WARN_ON(sg_dma_address(sg) & 0x7);
 
-		cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
+			if (data->blocks > 1)
+				len /= data->blksz;
+
+			desc[i].cmd_cfg = cmd_cfg;
+			desc[i].cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK, len);
+			if (i > 0)
+				desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
+			desc[i].cmd_arg = cmd->arg;
+			desc[i].cmd_resp = 0;
+			desc[i].cmd_data = sg_dma_address(sg);
+		}
+		desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
 	} else {
 		cmd_cfg |= FIELD_PREP(CMD_CFG_TIMEOUT_MASK,
 				      ilog2(SD_EMMC_CMD_TIMEOUT));
+		cmd_cfg |= CMD_CFG_END_OF_CHAIN;
+		desc[0].cmd_cfg = cmd_cfg;
+		desc[0].cmd_arg = cmd->arg;
+		desc[0].cmd_resp = 0;
+		desc[0].cmd_data = 0;
 	}
 
 	host->cmd = cmd;
 
-	/* Last descriptor */
-	cmd_cfg |= CMD_CFG_END_OF_CHAIN;
-	writel(cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
-	writel(cmd_data, host->regs + SD_EMMC_CMD_DAT);
-	writel(0, host->regs + SD_EMMC_CMD_RSP);
 	wmb(); /* ensure descriptor is written before kicked */
-	writel(cmd->arg, host->regs + SD_EMMC_CMD_ARG);
+	cfg = host->descs_dma_addr | START_DESC_BUSY;
+	writel(cfg, host->regs + SD_EMMC_START);
 }
 
 static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct meson_host *host = mmc_priv(mmc);
+	bool needs_pre_post_req = mrq->data && !mrq->data->host_cookie;
+
+	if (needs_pre_post_req)
+		meson_mmc_pre_req(mmc, mrq);
 
 	/* Stop execution */
 	writel(0, host->regs + SD_EMMC_START);
 
-	if (mrq->sbc)
-		meson_mmc_start_cmd(mmc, mrq->sbc);
-	else
-		meson_mmc_start_cmd(mmc, mrq->cmd);
+	meson_mmc_start_cmd(mmc, mrq->sbc ?: mrq->cmd);
+
+	if (needs_pre_post_req)
+		meson_mmc_post_req(mmc, mrq, 0);
 }
 
 static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd)
@@ -618,7 +656,9 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
 		if (data && !cmd->error)
 			data->bytes_xfered = data->blksz * data->blocks;
-		ret = IRQ_WAKE_THREAD;
+
+		if (meson_mmc_get_next_command(cmd))
+			ret = IRQ_WAKE_THREAD;
 	} else {
 		dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
 			 status, cmd->opcode, cmd->arg,
@@ -648,20 +688,10 @@ static irqreturn_t meson_mmc_irq_thread(int irq, void *dev_id)
 {
 	struct meson_host *host = dev_id;
 	struct mmc_command *next_cmd, *cmd = host->cmd;
-	struct mmc_data *data;
-	unsigned int xfer_bytes;
 
 	if (WARN_ON(!cmd))
 		return IRQ_NONE;
 
-	data = cmd->data;
-	if (data && data->flags & MMC_DATA_READ) {
-		xfer_bytes = data->blksz * data->blocks;
-		WARN_ON(xfer_bytes > host->bounce_buf_size);
-		sg_copy_from_buffer(data->sg, data->sg_len,
-				    host->bounce_buf, xfer_bytes);
-	}
-
 	next_cmd = meson_mmc_get_next_command(cmd);
 	if (next_cmd)
 		meson_mmc_start_cmd(host->mmc, next_cmd);
@@ -701,6 +731,8 @@ static const struct mmc_host_ops meson_mmc_ops = {
 	.request	= meson_mmc_request,
 	.set_ios	= meson_mmc_set_ios,
 	.get_cd         = meson_mmc_get_cd,
+	.pre_req	= meson_mmc_pre_req,
+	.post_req	= meson_mmc_post_req,
 };
 
 static int meson_mmc_probe(struct platform_device *pdev)
@@ -781,14 +813,13 @@ static int meson_mmc_probe(struct platform_device *pdev)
 	mmc->caps |= MMC_CAP_CMD23;
 	mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
 	mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
+	mmc->max_segs = SD_EMMC_DESC_BUF_LEN / sizeof(struct sd_emmc_desc);
+	mmc->max_seg_size = mmc->max_req_size;
 
-	/* data bounce buffer */
-	host->bounce_buf_size = mmc->max_req_size;
-	host->bounce_buf =
-		dma_alloc_coherent(host->dev, host->bounce_buf_size,
-				   &host->bounce_dma_addr, GFP_KERNEL);
-	if (host->bounce_buf == NULL) {
-		dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n");
+	host->descs = dma_alloc_coherent(host->dev, SD_EMMC_DESC_BUF_LEN,
+					 &host->descs_dma_addr, GFP_KERNEL);
+	if (!host->descs) {
+		dev_err(host->dev, "Allocating descriptor DMA buffer failed\n");
 		ret = -ENOMEM;
 		goto err_div_clk;
 	}
@@ -816,8 +847,8 @@ static int meson_mmc_remove(struct platform_device *pdev)
 	/* disable interrupts */
 	writel(0, host->regs + SD_EMMC_IRQ_EN);
 
-	dma_free_coherent(host->dev, host->bounce_buf_size,
-			  host->bounce_buf, host->bounce_dma_addr);
+	dma_free_coherent(host->dev, SD_EMMC_DESC_BUF_LEN,
+			  host->descs, host->descs_dma_addr);
 
 	clk_disable_unprepare(host->cfg_div_clk);
 	clk_disable_unprepare(host->core_clk);
-- 
2.12.1

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 22.03.2017 um 11:09 schrieb Helmut Klein:
> On 20.03.2017 20:54, Heiner Kallweit wrote:
>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>
>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>
>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>
>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>
>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>
>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>> reader).
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>
>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>
>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>
>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>> of the patch
>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>
>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>> the
>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>> ---
>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>
>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>> +};
>>>>>>>>>>> +
>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>
>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>
>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>> -};
>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>          return NULL;
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>> +{
>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (!data)
>>>>>>>>>>> +        return;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>> +
>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>> data->sg_len,
>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>> +                   int err)
>>>>>>>>>>> +{
>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>> +    int i;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>
>>>>>>>>>>>      /* Response */
>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>
>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>
>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>> -    /* data? */
>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +    if (data) {
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>> +
>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>
>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>> %d\n",
>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>              }
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>          }
>>>>>>>>>>>
>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>> -        } else {
>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>> -        }
>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>
>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +
>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>> +
>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>> +
>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>> +        }
>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>      } else {
>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>      }
>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>
>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>      else
>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>> +
>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>
>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>> +
>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>      }
>>>>>>>>>>> +
>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>> +
>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>
>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> -    else  {
>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>> +    } else  {
>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>  {
>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>
>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>
>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>> -    }
>>>>>>>>>>> -
>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>> -    else
>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>
>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>  };
>>>>>>>>>>>
>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>
>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> -
>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>> buffer.\n");
>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>> +
>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>> failed\n");
>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>      }
>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>
>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>
>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>
>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>
>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>
>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>> or just specific ones fail.
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>> regards
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>> configuration.
>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>
>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>
>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>  dmesg -n 8
>>>>>>>>  dmesg -D
>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>  sleep 1
>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>  modprobe brcmfmac
>>>>>>>>  logger "modules loaded"
>>>>>>>>  sleep 1
>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>
>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>
>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>> loading of meson-gx-mmc
>>>>>>>>
>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>> i've always got 11 of them.
>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>
>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>> timeout
>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x21
>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>> data:0x00
>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>> BCM0, rev=0
>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>> oob=0 sd=0
>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>> failed -19...
>>>>>>>>
>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>> lines after the first CMD53)
>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>> 400000 -> 52000000
>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>   loading brcmfmac
>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>> available.
>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms nsac 0
>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>> 00000000 00000000
>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>> data:0x28
>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>
>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>
>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>> the actual register value.
>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>> send the log?
>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>> the issue.
>>>>>>>
>>>>>>> Rgds, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>> len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53)
>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>> host->descs[0].cmd_data);
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> here is the output:
>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>> small read DMA returns
>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>
>>>>> OK, one last attempt before I have to think about a better way to
>>>>> tackle this issue.
>>>>>
>>>>> Could you please replace the last logging extension patch with this one?
>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index ca685902..5b511944 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>
>>>>> +            if (cmd->opcode == 53)
>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>> +
>>>>>              if (data->blocks > 1)
>>>>>                  len /= data->blksz;
>>>>>
>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>> *dev_id)
>>>>>
>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>
>>>>> +    if (cmd->opcode == 53) {
>>>>> +        dma_rmb();
>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>> +    }
>>>>> +
>>>>>      cmd->error = 0;
>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>
>>>>
>>>> the output is not really different (for the 2 cmd53)
>>>> [   37.113577] sg: idx 0 len 4
>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>> [   37.114016] sg: idx 0 len 4
>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>
>>>> Helmut
>>>
>>>
>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>
>>> here are the patches
>>>
>>> for the fully operational version
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>
>>>      /* data? */
>>>      if (cmd->data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>          if (cmd->data->blocks > 1) {
>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>> +
>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>  }
>>>
>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> and this is for the version with the sdio problem
>>>
>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>      }
>>>
>>>      if (data) {
>>> +
>>> +        dev_dbg(host->dev, "DBG data");
>>> +
>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>
>>>          if (data->blocks > 1) {
>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>      host->cmd = cmd;
>>>
>>>      wmb(); /* ensure descriptor is written before kicked */
>>> +
>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>> +
>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>  }
>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>      status = raw_status & irq_en;
>>>
>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>> +
>>>      if (!status) {
>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>               raw_status, irq_en);
>>>
>>> the filtered logs are identical up and including the 2nd cmd53.
>>>
>>> Helmut
>>>
>>>
>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>> either in the DMA subsystem or there's a hw bug causing issues with very small
>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>> transfers.
>>
>> For up to 4 bytes the chip supports an alternative transfer method.
>> Let's try this as workaround.
>>
>> Could you please apply:
>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>
>>
>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>> index 4f9fafd3..cf9be13f 100644
>> --- a/drivers/mmc/host/meson-gx-mmc.c
>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>          return NULL;
>>  }
>>
>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>> +{
>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>> +           data->flags & MMC_DATA_READ;
>> +}
>> +
>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>  {
>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>                     int err)
>>  {
>> +    struct meson_host *host = mmc_priv(mmc);
>>      struct mmc_data *data = mrq->data;
>>
>>      if (data && data->sg_count)
>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>                   meson_mmc_get_data_dir(data));
>> +
>> +    if (meson_mmc_small_read(data)) {
>> +        int cnt;
>> +
>> +        dma_rmb();
>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>> +                &host->descs[0].cmd_data, data->blksz);
>> +        if (cnt != data->blksz)
>> +            dev_err(host->dev, "error copying to scatterlist\n");
>> +    }
>>  }
>>
>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>      }
>>
>>      if (data) {
>> +        bool small_read = meson_mmc_small_read(data);
>> +
>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>
>>          if (data->blocks > 1) {
>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>              }
>>          }
>>
>> +        /*
>> +         * workaround for most likely hw bug
>> +         * if up to 4 bytes receive them in the descriptor instead
>> +         * of using dma_map_sg/dma_unmap_sg
>> +        */
>> +        if (small_read)
>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>> +
>>          data->bytes_xfered = 0;
>>          if (data->flags & MMC_DATA_WRITE)
>>              cmd_cfg |= CMD_CFG_DATA_WR;
>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>              desc[i].cmd_arg = cmd->arg;
>>              desc[i].cmd_resp = 0;
>> -            desc[i].cmd_data = sg_dma_address(sg);
>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>          }
>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>
>>
> 
> Hallo Heiner,
> 
> here is  the result:
> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375050] mmc0:     4 bytes transferred: 0
> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
> 
> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
> [   44.375311] mmc0:     4 bytes transferred: 0
> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
> 
> the 1. cmd53 returned the correct data.
> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
> 
> Helmut
> 

Hallo Helmut,

next attempt .. After some more analysis I suspect a bug in SDIO core regarding a not
properly aligned buffer (not aligned on 8 byte boundary what is needed for 64 bit DMA).

I'd appreciate if you could test attached four patches on top of latest next kernel.
Patches 1 + 2: smaller refactorings which have been submitted already but are not applied yet
Patch 3: Fix for suspected issue in SDIO core
Patch 4: Switch to descriptor chain mode

By the way, if you go with latest next kernel:
STMMAC ethernet driver is broken currently, I had to go back to version from March 10th.

Thanks in advance,
Heiner

-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-factor-out-set-blksz.patch
Type: text/x-diff
Size: 2462 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-amlogic/attachments/20170329/e208851b/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0002-factor-out-setting-response-bits.patch
Type: text/x-diff
Size: 1893 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-amlogic/attachments/20170329/e208851b/attachment-0001.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0003-fix-sdio.patch
Type: text/x-diff
Size: 1651 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-amlogic/attachments/20170329/e208851b/attachment-0002.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0004-change-to-desc-chain-mode.patch
Type: text/x-diff
Size: 8287 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-amlogic/attachments/20170329/e208851b/attachment-0003.bin>

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 29.03.2017 07:46, Heiner Kallweit wrote:
> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>
>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>
>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>
>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>
>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>
>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>
>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>
>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>
>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>
>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>> of the patch
>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>
>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>>> the
>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>> ---
>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>
>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>> +};
>>>>>>>>>>>> +
>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>
>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>
>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>  };
>>>>>>>>>>>>
>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>> -};
>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>> +        return;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>
>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>
>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>
>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>      } else {
>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>      }
>>>>>>>>>>>>
>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>> +
>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>
>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>> %d\n",
>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>              }
>>>>>>>>>>>> -        } else {
>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>          }
>>>>>>>>>>>>
>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>> -        } else {
>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>> -        }
>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>
>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>> +
>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>> +
>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>> +
>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>> +        }
>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>
>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>      } else {
>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>      }
>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>
>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>
>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>
>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>      else
>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>
>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>> +
>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>      }
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>> +
>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>
>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>> -    else  {
>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>
>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>
>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>> -    }
>>>>>>>>>>>> -
>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>> -    else
>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>
>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>  }
>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>  };
>>>>>>>>>>>>
>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>
>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>> -
>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>      }
>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>
>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>
>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>
>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>
>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>
>>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>>> regards
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>> configuration.
>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>
>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>
>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>  dmesg -n 8
>>>>>>>>>  dmesg -D
>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>  sleep 1
>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>  logger "modules loaded"
>>>>>>>>>  sleep 1
>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>
>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>
>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>
>>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>>> i've always got 11 of them.
>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>
>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>> 400000 -> 52000000
>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>   loading brcmfmac
>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>> available.
>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x21
>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>> data:0x00
>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>> BCM0, rev=0
>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>> oob=0 sd=0
>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>> failed -19...
>>>>>>>>>
>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>> lines after the first CMD53)
>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>> 400000 -> 52000000
>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>   loading brcmfmac
>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>> available.
>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>
>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>
>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>> the actual register value.
>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>>> send the log?
>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>> the issue.
>>>>>>>>
>>>>>>>> Rgds, Heiner
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>
>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>>> len);
>>>>>>>> +
>>>>>>>>              if (data->blocks > 1)
>>>>>>>>                  len /= data->blksz;
>>>>>>>>
>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>> *dev_id)
>>>>>>>>
>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>
>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>> host->descs[0].cmd_data);
>>>>>>>> +
>>>>>>>>      cmd->error = 0;
>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>
>>>>>>>
>>>>>>> here is the output:
>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>> nsac 0
>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>> 00000000
>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>> small read DMA returns
>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>
>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>> tackle this issue.
>>>>>>
>>>>>> Could you please replace the last logging extension patch with this one?
>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index ca685902..5b511944 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>
>>>>>> +            if (cmd->opcode == 53)
>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>> +
>>>>>>              if (data->blocks > 1)
>>>>>>                  len /= data->blksz;
>>>>>>
>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>> *dev_id)
>>>>>>
>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>
>>>>>> +    if (cmd->opcode == 53) {
>>>>>> +        dma_rmb();
>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>>> +    }
>>>>>> +
>>>>>>      cmd->error = 0;
>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>
>>>>>
>>>>> the output is not really different (for the 2 cmd53)
>>>>> [   37.113577] sg: idx 0 len 4
>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>> [   37.114016] sg: idx 0 len 4
>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>
>>>>> Helmut
>>>>
>>>>
>>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>>
>>>> here are the patches
>>>>
>>>> for the fully operational version
>>>>
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>
>>>>      /* data? */
>>>>      if (cmd->data) {
>>>> +
>>>> +        dev_dbg(host->dev, "DBG data");
>>>> +
>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>          if (cmd->data->blocks > 1) {
>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>> +
>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>> +
>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>  }
>>>>
>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>      status = raw_status & irq_en;
>>>>
>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>> +
>>>>      if (!status) {
>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>               raw_status, irq_en);
>>>>
>>>> and this is for the version with the sdio problem
>>>>
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>      }
>>>>
>>>>      if (data) {
>>>> +
>>>> +        dev_dbg(host->dev, "DBG data");
>>>> +
>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>
>>>>          if (data->blocks > 1) {
>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>      host->cmd = cmd;
>>>>
>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>> +
>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>> +
>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>  }
>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>      status = raw_status & irq_en;
>>>>
>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>> +
>>>>      if (!status) {
>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>               raw_status, irq_en);
>>>>
>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>>> either in the DMA subsystem or there's a hw bug causing issues with very small
>>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>>> transfers.
>>>
>>> For up to 4 bytes the chip supports an alternative transfer method.
>>> Let's try this as workaround.
>>>
>>> Could you please apply:
>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>>
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>> index 4f9fafd3..cf9be13f 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>          return NULL;
>>>  }
>>>
>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>> +{
>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>> +           data->flags & MMC_DATA_READ;
>>> +}
>>> +
>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>  {
>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>                     int err)
>>>  {
>>> +    struct meson_host *host = mmc_priv(mmc);
>>>      struct mmc_data *data = mrq->data;
>>>
>>>      if (data && data->sg_count)
>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>                   meson_mmc_get_data_dir(data));
>>> +
>>> +    if (meson_mmc_small_read(data)) {
>>> +        int cnt;
>>> +
>>> +        dma_rmb();
>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>> +                &host->descs[0].cmd_data, data->blksz);
>>> +        if (cnt != data->blksz)
>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>> +    }
>>>  }
>>>
>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>      }
>>>
>>>      if (data) {
>>> +        bool small_read = meson_mmc_small_read(data);
>>> +
>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>
>>>          if (data->blocks > 1) {
>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>              }
>>>          }
>>>
>>> +        /*
>>> +         * workaround for most likely hw bug
>>> +         * if up to 4 bytes receive them in the descriptor instead
>>> +         * of using dma_map_sg/dma_unmap_sg
>>> +        */
>>> +        if (small_read)
>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>> +
>>>          data->bytes_xfered = 0;
>>>          if (data->flags & MMC_DATA_WRITE)
>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>              desc[i].cmd_arg = cmd->arg;
>>>              desc[i].cmd_resp = 0;
>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>          }
>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>
>>>
>>
>> Hallo Heiner,
>>
>> here is  the result:
>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>> [   44.375050] mmc0:     4 bytes transferred: 0
>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>
>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>> [   44.375311] mmc0:     4 bytes transferred: 0
>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>
>> the 1. cmd53 returned the correct data.
>> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
>>
>> Helmut
>>
>
> Hallo Helmut,
>
> next attempt .. After some more analysis I suspect a bug in SDIO core regarding a not
> properly aligned buffer (not aligned on 8 byte boundary what is needed for 64 bit DMA).
>
> I'd appreciate if you could test attached four patches on top of latest next kernel.
> Patches 1 + 2: smaller refactorings which have been submitted already but are not applied yet
> Patch 3: Fix for suspected issue in SDIO core
> Patch 4: Switch to descriptor chain mode
>
> By the way, if you go with latest next kernel:
> STMMAC ethernet driver is broken currently, I had to go back to version from March 10th.
>
> Thanks in advance,
> Heiner
>

Hallo Heiner,

i've applied the 4 patches to the current linux-next.

and

i think, you did it!

The adapter type is now detected und the firmware download succeeds.

wlan0 gets an ip-address via dhcp.

but: linux-next itself seems to have a problem with networking. even 
without having loaded
meson-gx-mmc and brcmfmac the ethernet communication crashes.
so i cannot do any further tests.

the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is 
much better then with to old driver (none sg-list)

i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from 
linux-next. But failed to compile it

   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of 
function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
          mmc_get_dma_dir(data));
          ^
   ./include/linux/dma-mapping.h:410:58: note: in definition of macro 
‘dma_map_sg’
    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 29.03.2017 07:46, Heiner Kallweit wrote:
> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>
>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>
>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>
>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>
>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>
>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>
>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>
>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>
>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>
>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>> of the patch
>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>
>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>>> the
>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>> ---
>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>
>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>> +};
>>>>>>>>>>>> +
>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>
>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>
>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>  };
>>>>>>>>>>>>
>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>> -};
>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>> +        return;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>
>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>
>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>
>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>      } else {
>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>      }
>>>>>>>>>>>>
>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>> +
>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>
>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>> %d\n",
>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>              }
>>>>>>>>>>>> -        } else {
>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>          }
>>>>>>>>>>>>
>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>> -        } else {
>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>> -        }
>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>
>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>> +
>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>> +
>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>> +
>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>> +        }
>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>
>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>      } else {
>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>      }
>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>
>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>
>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>
>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>      else
>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>
>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>> +
>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>      }
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>> +
>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>
>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>> -    else  {
>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>
>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>
>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>> -    }
>>>>>>>>>>>> -
>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>> -    else
>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>
>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>  }
>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>  };
>>>>>>>>>>>>
>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>
>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>> -
>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>> +
>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>      }
>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>
>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>
>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>
>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>
>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>
>>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>>> regards
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>> configuration.
>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>
>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>
>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>  dmesg -n 8
>>>>>>>>>  dmesg -D
>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>  sleep 1
>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>  logger "modules loaded"
>>>>>>>>>  sleep 1
>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>
>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>
>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>
>>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>>> i've always got 11 of them.
>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>
>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>> timeout
>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>> 400000 -> 52000000
>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>   loading brcmfmac
>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>> available.
>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x21
>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>> data:0x00
>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>> BCM0, rev=0
>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>> oob=0 sd=0
>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>> failed -19...
>>>>>>>>>
>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>> lines after the first CMD53)
>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>> 400000 -> 52000000
>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>   loading brcmfmac
>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>> available.
>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>> 00000000 00000000
>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>> data:0x28
>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>
>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>
>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>> the actual register value.
>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>>> send the log?
>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>> the issue.
>>>>>>>>
>>>>>>>> Rgds, Heiner
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>
>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>>> len);
>>>>>>>> +
>>>>>>>>              if (data->blocks > 1)
>>>>>>>>                  len /= data->blksz;
>>>>>>>>
>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>> *dev_id)
>>>>>>>>
>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>
>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>> host->descs[0].cmd_data);
>>>>>>>> +
>>>>>>>>      cmd->error = 0;
>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>
>>>>>>>
>>>>>>> here is the output:
>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>> nsac 0
>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>> 00000000
>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>> small read DMA returns
>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>
>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>> tackle this issue.
>>>>>>
>>>>>> Could you please replace the last logging extension patch with this one?
>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index ca685902..5b511944 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>
>>>>>> +            if (cmd->opcode == 53)
>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>> +
>>>>>>              if (data->blocks > 1)
>>>>>>                  len /= data->blksz;
>>>>>>
>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>> *dev_id)
>>>>>>
>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>
>>>>>> +    if (cmd->opcode == 53) {
>>>>>> +        dma_rmb();
>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>>> +    }
>>>>>> +
>>>>>>      cmd->error = 0;
>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>
>>>>>
>>>>> the output is not really different (for the 2 cmd53)
>>>>> [   37.113577] sg: idx 0 len 4
>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>> [   37.114016] sg: idx 0 len 4
>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>
>>>>> Helmut
>>>>
>>>>
>>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>>
>>>> here are the patches
>>>>
>>>> for the fully operational version
>>>>
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>
>>>>      /* data? */
>>>>      if (cmd->data) {
>>>> +
>>>> +        dev_dbg(host->dev, "DBG data");
>>>> +
>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>          if (cmd->data->blocks > 1) {
>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>> +
>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>> +
>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>  }
>>>>
>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>      status = raw_status & irq_en;
>>>>
>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>> +
>>>>      if (!status) {
>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>               raw_status, irq_en);
>>>>
>>>> and this is for the version with the sdio problem
>>>>
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>      }
>>>>
>>>>      if (data) {
>>>> +
>>>> +        dev_dbg(host->dev, "DBG data");
>>>> +
>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>
>>>>          if (data->blocks > 1) {
>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>      host->cmd = cmd;
>>>>
>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>> +
>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>> +
>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>  }
>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>      status = raw_status & irq_en;
>>>>
>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>> +
>>>>      if (!status) {
>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>               raw_status, irq_en);
>>>>
>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>>> either in the DMA subsystem or there's a hw bug causing issues with very small
>>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>>> transfers.
>>>
>>> For up to 4 bytes the chip supports an alternative transfer method.
>>> Let's try this as workaround.
>>>
>>> Could you please apply:
>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>>
>>>
>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>> index 4f9fafd3..cf9be13f 100644
>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>          return NULL;
>>>  }
>>>
>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>> +{
>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>> +           data->flags & MMC_DATA_READ;
>>> +}
>>> +
>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>  {
>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>                     int err)
>>>  {
>>> +    struct meson_host *host = mmc_priv(mmc);
>>>      struct mmc_data *data = mrq->data;
>>>
>>>      if (data && data->sg_count)
>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>                   meson_mmc_get_data_dir(data));
>>> +
>>> +    if (meson_mmc_small_read(data)) {
>>> +        int cnt;
>>> +
>>> +        dma_rmb();
>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>> +                &host->descs[0].cmd_data, data->blksz);
>>> +        if (cnt != data->blksz)
>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>> +    }
>>>  }
>>>
>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>      }
>>>
>>>      if (data) {
>>> +        bool small_read = meson_mmc_small_read(data);
>>> +
>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>
>>>          if (data->blocks > 1) {
>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>              }
>>>          }
>>>
>>> +        /*
>>> +         * workaround for most likely hw bug
>>> +         * if up to 4 bytes receive them in the descriptor instead
>>> +         * of using dma_map_sg/dma_unmap_sg
>>> +        */
>>> +        if (small_read)
>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>> +
>>>          data->bytes_xfered = 0;
>>>          if (data->flags & MMC_DATA_WRITE)
>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>              desc[i].cmd_arg = cmd->arg;
>>>              desc[i].cmd_resp = 0;
>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>          }
>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>
>>>
>>
>> Hallo Heiner,
>>
>> here is  the result:
>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>> [   44.375050] mmc0:     4 bytes transferred: 0
>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>
>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>> [   44.375311] mmc0:     4 bytes transferred: 0
>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>
>> the 1. cmd53 returned the correct data.
>> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
>>
>> Helmut
>>
>
> Hallo Helmut,
>
> next attempt .. After some more analysis I suspect a bug in SDIO core regarding a not
> properly aligned buffer (not aligned on 8 byte boundary what is needed for 64 bit DMA).
>
> I'd appreciate if you could test attached four patches on top of latest next kernel.
> Patches 1 + 2: smaller refactorings which have been submitted already but are not applied yet
> Patch 3: Fix for suspected issue in SDIO core
> Patch 4: Switch to descriptor chain mode
>
> By the way, if you go with latest next kernel:
> STMMAC ethernet driver is broken currently, I had to go back to version from March 10th.
>
> Thanks in advance,
> Heiner
>

Hallo Heiner,

i've applied the 4 patches to the current linux-next.

and

i think, you did it!

The adapter type is now detected und the firmware download succeeds.

wlan0 gets an ip-address via dhcp.

but: linux-next itself seems to have a problem with networking. even 
without having loaded
meson-gx-mmc and brcmfmac the ethernet communication crashes.
so i cannot do any further tests.

the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is 
much better then with to old driver (none sg-list)

i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from 
linux-next. But failed to compile it

   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of 
function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
          mmc_get_dma_dir(data));
          ^
   ./include/linux/dma-mapping.h:410:58: note: in definition of macro 
?dma_map_sg?
    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)

Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 29.03.2017 um 16:29 schrieb Helmut Klein:
> On 29.03.2017 07:46, Heiner Kallweit wrote:
>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>
>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>>>> the
>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>> ---
>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>
>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>> +};
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>> -};
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>
>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              }
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>          }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -        }
>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>> +        }
>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>      else
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -    }
>>>>>>>>>>>>> -
>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>> -    else
>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>>> -
>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>
>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>
>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>
>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>> configuration.
>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>
>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>
>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>  dmesg -D
>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>  sleep 1
>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>  sleep 1
>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>
>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>
>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>
>>>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>
>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x21
>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>> data:0x00
>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported
>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>> failed -19...
>>>>>>>>>>
>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>
>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>
>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>> the actual register value.
>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>>>> send the log?
>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>> the issue.
>>>>>>>>>
>>>>>>>>> Rgds, Heiner
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>
>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>>>> len);
>>>>>>>>> +
>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>
>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>> *dev_id)
>>>>>>>>>
>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>
>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>> +
>>>>>>>>>      cmd->error = 0;
>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>
>>>>>>>>
>>>>>>>> here is the output:
>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>> small read DMA returns
>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>
>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>> tackle this issue.
>>>>>>>
>>>>>>> Could you please replace the last logging extension patch with this one?
>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index ca685902..5b511944 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>> +        dma_rmb();
>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>>>> +    }
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> the output is not really different (for the 2 cmd53)
>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>
>>>>>> Helmut
>>>>>
>>>>>
>>>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>>>
>>>>> here are the patches
>>>>>
>>>>> for the fully operational version
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>
>>>>>      /* data? */
>>>>>      if (cmd->data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>          if (cmd->data->blocks > 1) {
>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>> +
>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>  }
>>>>>
>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> and this is for the version with the sdio problem
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      host->cmd = cmd;
>>>>>
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>> +
>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>  }
>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>>>> either in the DMA subsystem or there's a hw bug causing issues with very small
>>>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>>>> transfers.
>>>>
>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>> Let's try this as workaround.
>>>>
>>>> Could you please apply:
>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 4f9fafd3..cf9be13f 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>          return NULL;
>>>>  }
>>>>
>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>> +{
>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>> +           data->flags & MMC_DATA_READ;
>>>> +}
>>>> +
>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>  {
>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>                     int err)
>>>>  {
>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>      struct mmc_data *data = mrq->data;
>>>>
>>>>      if (data && data->sg_count)
>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>                   meson_mmc_get_data_dir(data));
>>>> +
>>>> +    if (meson_mmc_small_read(data)) {
>>>> +        int cnt;
>>>> +
>>>> +        dma_rmb();
>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>> +        if (cnt != data->blksz)
>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>> +    }
>>>>  }
>>>>
>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>      }
>>>>
>>>>      if (data) {
>>>> +        bool small_read = meson_mmc_small_read(data);
>>>> +
>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>
>>>>          if (data->blocks > 1) {
>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>              }
>>>>          }
>>>>
>>>> +        /*
>>>> +         * workaround for most likely hw bug
>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>> +        */
>>>> +        if (small_read)
>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>> +
>>>>          data->bytes_xfered = 0;
>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>              desc[i].cmd_arg = cmd->arg;
>>>>              desc[i].cmd_resp = 0;
>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>          }
>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> here is  the result:
>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>
>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>
>>> the 1. cmd53 returned the correct data.
>>> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
>>>
>>> Helmut
>>>
>>
>> Hallo Helmut,
>>
>> next attempt .. After some more analysis I suspect a bug in SDIO core regarding a not
>> properly aligned buffer (not aligned on 8 byte boundary what is needed for 64 bit DMA).
>>
>> I'd appreciate if you could test attached four patches on top of latest next kernel.
>> Patches 1 + 2: smaller refactorings which have been submitted already but are not applied yet
>> Patch 3: Fix for suspected issue in SDIO core
>> Patch 4: Switch to descriptor chain mode
>>
>> By the way, if you go with latest next kernel:
>> STMMAC ethernet driver is broken currently, I had to go back to version from March 10th.
>>
>> Thanks in advance,
>> Heiner
>>
> 
> Hallo Heiner,
> 
> i've applied the 4 patches to the current linux-next.
> 
> and
> 
> i think, you did it!
> 
> The adapter type is now detected und the firmware download succeeds.
> 
> wlan0 gets an ip-address via dhcp.
> 
Great, thanks a lot again for testing!
Then I will submit patch 3 officially and add your Tested-by.

> but: linux-next itself seems to have a problem with networking. even without having loaded
> meson-gx-mmc and brcmfmac the ethernet communication crashes.
> so i cannot do any further tests.
> 
That's exactly what I wrote. STMMAC ethernet driver is broken currently. I use the version
from linux-next from March 10th.

> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is much better then with to old driver (none sg-list)
> 
Nice. For comparison: I have a 128 GB eMMC giving 50 MB/s with 60 MHz in HS200 mode. That's the highest stable frequency on
my system with the driver's default configuration. Some (not submitted yet) tuning allows me to use HS200/HS400 with 200 MHz
resulting in 140 MB/s.
Of course the figures also depend on how you test it. I use a simple:
dd if=/dev/mmcblk0 of=/dev/null iflag=direct bs=200M count=1

> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from linux-next. But failed to compile it
> 
>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>          mmc_get_dma_dir(data));
>          ^
This helper was added to include/linux/mmc/host.h recently.

>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro ‘dma_map_sg’
>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
> 
> Helmut
> 
Heiner
> 
> 

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 29.03.2017 um 16:29 schrieb Helmut Klein:
> On 29.03.2017 07:46, Heiner Kallweit wrote:
>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my minimx
>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem starts
>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the the
>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much appreciated.
>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when providing
>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap on an
>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is compiled as
>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211, which
>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross compiled
>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb card
>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13 FWID
>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1 4.00 MiB
>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2 4.00 MiB
>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated mmc-pwrseq
>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>
>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set plus
>>>>>>>>>>>>> the
>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>> ---
>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>
>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>> +};
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>> -};
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned
>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>
>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK << CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              }
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>          }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg, cmd->data->sg_len,
>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -        }
>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr & CMD_DATA_MASK;
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>> +        }
>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout & CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>      else
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor timeout\n");
>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -    }
>>>>>>>>>>>>> -
>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>> -    else
>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>>> -
>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>
>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not. Especially as
>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>
>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>
>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ? This
>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>> configuration.
>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>
>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>
>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>  dmesg -D
>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>  sleep 1
>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>  sleep 1
>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>
>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>
>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>
>>>>>>>>>> unhandled interrupts: independent of the number of applied patches
>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>
>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ: Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x21
>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>> data:0x00
>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported
>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>> failed -19...
>>>>>>>>>>
>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor ID: 0x02d0
>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device ID: 0x4330
>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>
>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>
>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>> the actual register value.
>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one and
>>>>>>>>> send the log?
>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>> the issue.
>>>>>>>>>
>>>>>>>>> Rgds, Heiner
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>
>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len %u\n", i,
>>>>>>>>> len);
>>>>>>>>> +
>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>
>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>> *dev_id)
>>>>>>>>>
>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>
>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>> +
>>>>>>>>>      cmd->error = 0;
>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>
>>>>>>>>
>>>>>>>> here is the output:
>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0: 721d0eb4
>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>> small read DMA returns
>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>
>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>> tackle this issue.
>>>>>>>
>>>>>>> Could you please replace the last logging extension patch with this one?
>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index ca685902..5b511944 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>> +        dma_rmb();
>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",  host->descs[0].cmd_data);
>>>>>>> +    }
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> the output is not really different (for the 2 cmd53)
>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>
>>>>>> Helmut
>>>>>
>>>>>
>>>>> I've added my own debugging code to both variations of the driver. but without a positiv result
>>>>>
>>>>> here are the patches
>>>>>
>>>>> for the fully operational version
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18 15:22:31.000000000 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 13:02:05.254762191 +0100
>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>
>>>>>      /* data? */
>>>>>      if (cmd->data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>          if (cmd->data->blocks > 1) {
>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>> +
>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>  }
>>>>>
>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> and this is for the version with the sdio problem
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:50:32.956474080 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20 12:57:27.185837225 +0100
>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      host->cmd = cmd;
>>>>>
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp: 0x%08x",
>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>> +
>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>  }
>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x, irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Thanks. Really appreciate your support. Meanwhile I think there must be a bug
>>>> either in the DMA subsystem or there's a hw bug causing issues with very small
>>>> transfers. That's the only difference between SD/eMMC and SDIO on that level:
>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very small
>>>> transfers.
>>>>
>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>> Let's try this as workaround.
>>>>
>>>> Could you please apply:
>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the following:
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 4f9fafd3..cf9be13f 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -185,6 +185,12 @@ static struct mmc_command *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>          return NULL;
>>>>  }
>>>>
>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>> +{
>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>> +           data->flags & MMC_DATA_READ;
>>>> +}
>>>> +
>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct mmc_data *data)
>>>>  {
>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
>>>>                     int err)
>>>>  {
>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>      struct mmc_data *data = mrq->data;
>>>>
>>>>      if (data && data->sg_count)
>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>                   meson_mmc_get_data_dir(data));
>>>> +
>>>> +    if (meson_mmc_small_read(data)) {
>>>> +        int cnt;
>>>> +
>>>> +        dma_rmb();
>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>> +        if (cnt != data->blksz)
>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>> +    }
>>>>  }
>>>>
>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long clk_rate)
>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>      }
>>>>
>>>>      if (data) {
>>>> +        bool small_read = meson_mmc_small_read(data);
>>>> +
>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>
>>>>          if (data->blocks > 1) {
>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>              }
>>>>          }
>>>>
>>>> +        /*
>>>> +         * workaround for most likely hw bug
>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>> +        */
>>>> +        if (small_read)
>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>> +
>>>>          data->bytes_xfered = 0;
>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>              desc[i].cmd_arg = cmd->arg;
>>>>              desc[i].cmd_resp = 0;
>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>          }
>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> here is  the result:
>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1, addr=0x08000, nbytes=4
>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>
>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms nsac 0
>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000 00000000
>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<< expected 0x16044330
>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0, rev=0
>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not supported
>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach failed!
>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach failed
>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>
>>> the 1. cmd53 returned the correct data.
>>> the second one failed. 0x0 instead of 0x16044330 (the same value as in the 1. cmd53)
>>>
>>> Helmut
>>>
>>
>> Hallo Helmut,
>>
>> next attempt .. After some more analysis I suspect a bug in SDIO core regarding a not
>> properly aligned buffer (not aligned on 8 byte boundary what is needed for 64 bit DMA).
>>
>> I'd appreciate if you could test attached four patches on top of latest next kernel.
>> Patches 1 + 2: smaller refactorings which have been submitted already but are not applied yet
>> Patch 3: Fix for suspected issue in SDIO core
>> Patch 4: Switch to descriptor chain mode
>>
>> By the way, if you go with latest next kernel:
>> STMMAC ethernet driver is broken currently, I had to go back to version from March 10th.
>>
>> Thanks in advance,
>> Heiner
>>
> 
> Hallo Heiner,
> 
> i've applied the 4 patches to the current linux-next.
> 
> and
> 
> i think, you did it!
> 
> The adapter type is now detected und the firmware download succeeds.
> 
> wlan0 gets an ip-address via dhcp.
> 
Great, thanks a lot again for testing!
Then I will submit patch 3 officially and add your Tested-by.

> but: linux-next itself seems to have a problem with networking. even without having loaded
> meson-gx-mmc and brcmfmac the ethernet communication crashes.
> so i cannot do any further tests.
> 
That's exactly what I wrote. STMMAC ethernet driver is broken currently. I use the version
from linux-next from March 10th.

> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is much better then with to old driver (none sg-list)
> 
Nice. For comparison: I have a 128 GB eMMC giving 50 MB/s with 60 MHz in HS200 mode. That's the highest stable frequency on
my system with the driver's default configuration. Some (not submitted yet) tuning allows me to use HS200/HS400 with 200 MHz
resulting in 140 MB/s.
Of course the figures also depend on how you test it. I use a simple:
dd if=/dev/mmcblk0 of=/dev/null iflag=direct bs=200M count=1

> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from linux-next. But failed to compile it
> 
>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>          mmc_get_dma_dir(data));
>          ^
This helper was added to include/linux/mmc/host.h recently.

>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro ?dma_map_sg?
>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
> 
> Helmut
> 
Heiner
> 
> 

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 29.03.2017 16:29, Helmut Klein wrote:
> On 29.03.2017 07:46, Heiner Kallweit wrote:
>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>> which
>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>> card
>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>
>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>> plus
>>>>>>>>>>>>> the
>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>> ---
>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>
>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>> +};
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>> -};
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>
>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              }
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>          }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -        }
>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>> +        }
>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>      else
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>> irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -    }
>>>>>>>>>>>>> -
>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>> -    else
>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>> -
>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>
>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>> Especially as
>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>
>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>
>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>> This
>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>> configuration.
>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>
>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>
>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>  dmesg -D
>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>  sleep 1
>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>  sleep 1
>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>
>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>
>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>
>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>> patches
>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>
>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>> rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x21
>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>> data:0x00
>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported
>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>> failed -19...
>>>>>>>>>>
>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>> rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>
>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>
>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>> the actual register value.
>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>> and
>>>>>>>>> send the log?
>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>> the issue.
>>>>>>>>>
>>>>>>>>> Rgds, Heiner
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>> mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>
>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>> %u\n", i,
>>>>>>>>> len);
>>>>>>>>> +
>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>
>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>> *dev_id)
>>>>>>>>>
>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>
>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>> +
>>>>>>>>>      cmd->error = 0;
>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>
>>>>>>>>
>>>>>>>> here is the output:
>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>> 721d0eb4
>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000
>>>>>>>> 00000000
>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>> small read DMA returns
>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>
>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>> tackle this issue.
>>>>>>>
>>>>>>> Could you please replace the last logging extension patch with
>>>>>>> this one?
>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index ca685902..5b511944 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>> +        dma_rmb();
>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>> host->descs[0].cmd_data);
>>>>>>> +    }
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> the output is not really different (for the 2 cmd53)
>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>
>>>>>> Helmut
>>>>>
>>>>>
>>>>> I've added my own debugging code to both variations of the driver.
>>>>> but without a positiv result
>>>>>
>>>>> here are the patches
>>>>>
>>>>> for the fully operational version
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>> 15:22:31.000000000 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>> 13:02:05.254762191 +0100
>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>
>>>>>      /* data? */
>>>>>      if (cmd->data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>          if (cmd->data->blocks > 1) {
>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>> 0x%08x",
>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>> +
>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>  }
>>>>>
>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>> irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> and this is for the version with the sdio problem
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>> 12:50:32.956474080 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>> 12:57:27.185837225 +0100
>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      host->cmd = cmd;
>>>>>
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>> 0x%08x",
>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>> +
>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>  }
>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>> irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>> be a bug
>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>> very small
>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>> that level:
>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>> small
>>>> transfers.
>>>>
>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>> Let's try this as workaround.
>>>>
>>>> Could you please apply:
>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>> following:
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 4f9fafd3..cf9be13f 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>          return NULL;
>>>>  }
>>>>
>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>> +{
>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>> +           data->flags & MMC_DATA_READ;
>>>> +}
>>>> +
>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>> mmc_data *data)
>>>>  {
>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>> DMA_FROM_DEVICE;
>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>> *mmc, struct mmc_request *mrq)
>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>> mmc_request *mrq,
>>>>                     int err)
>>>>  {
>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>      struct mmc_data *data = mrq->data;
>>>>
>>>>      if (data && data->sg_count)
>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>                   meson_mmc_get_data_dir(data));
>>>> +
>>>> +    if (meson_mmc_small_read(data)) {
>>>> +        int cnt;
>>>> +
>>>> +        dma_rmb();
>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>> +        if (cnt != data->blksz)
>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>> +    }
>>>>  }
>>>>
>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>> clk_rate)
>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>      }
>>>>
>>>>      if (data) {
>>>> +        bool small_read = meson_mmc_small_read(data);
>>>> +
>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>
>>>>          if (data->blocks > 1) {
>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>              }
>>>>          }
>>>>
>>>> +        /*
>>>> +         * workaround for most likely hw bug
>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>> +        */
>>>> +        if (small_read)
>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>> +
>>>>          data->bytes_xfered = 0;
>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>              desc[i].cmd_arg = cmd->arg;
>>>>              desc[i].cmd_resp = 0;
>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>          }
>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> here is  the result:
>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>> addr=0x08000, nbytes=4
>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>> nsac 0
>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>> 00000000
>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>
>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>> nsac 0
>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>> 00000000
>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>> expected 0x16044330
>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>> rev=0
>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>> supported
>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>> failed!
>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>> failed
>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>
>>> the 1. cmd53 returned the correct data.
>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>> in the 1. cmd53)
>>>
>>> Helmut
>>>
>>
>> Hallo Helmut,
>>
>> next attempt .. After some more analysis I suspect a bug in SDIO core
>> regarding a not
>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>> for 64 bit DMA).
>>
>> I'd appreciate if you could test attached four patches on top of
>> latest next kernel.
>> Patches 1 + 2: smaller refactorings which have been submitted already
>> but are not applied yet
>> Patch 3: Fix for suspected issue in SDIO core
>> Patch 4: Switch to descriptor chain mode
>>
>> By the way, if you go with latest next kernel:
>> STMMAC ethernet driver is broken currently, I had to go back to
>> version from March 10th.
>>
>> Thanks in advance,
>> Heiner
>>
>
> Hallo Heiner,
>
> i've applied the 4 patches to the current linux-next.
>
> and
>
> i think, you did it!
>
> The adapter type is now detected und the firmware download succeeds.
>
> wlan0 gets an ip-address via dhcp.
>
> but: linux-next itself seems to have a problem with networking. even
> without having loaded
> meson-gx-mmc and brcmfmac the ethernet communication crashes.
> so i cannot do any further tests.
>
> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
> much better then with to old driver (none sg-list)
>
> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
> linux-next. But failed to compile it
>
>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>          mmc_get_dma_dir(data));
>          ^
>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
> ‘dma_map_sg’
>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>
> Helmut
>
>

Hallo Heiner,

this evening i made some tests with linux-next. in the current version 
(2017-04-03)
your first two patches are already included. so i had to appl only 3 and 4.

tcp with the ethernet adpater is ok.

but with the wlan i get warnings
Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 
at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: 
brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core 
meson_gxbb_wdt evdev meson_ir rc_core
Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: 
kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon 
MiniMX (DT)
Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: 
brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 
task.stack: ffffffc010278000
Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at 
meson_mmc_start_cmd+0x1c8/0x318
Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at 
meson_mmc_request+0x4c/0x98
Nov  3 18:18:51 localhost kernel: [  134.461504] pc : 
[<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 
x28: 000000000000005c
Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 
x26: ffffffc072540ce0
Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 
x24: ffffffc01027bab0
Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 
x22: 00000000b54ca000
Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 
x20: ffffffc074348500
Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 
x18: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 
x16: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 
x14: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 
x12: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 
x10: ffffff800053e508
Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 
x8 : ffffffc01027bab0
Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 
x6 : 0000000000000001
Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff 
x4 : 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f 
x2 : ffffffc01027ba90
Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 
x0 : 000000000000005c
Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace 
f9fa3cc8e4194a72 ]---
Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
Nov  3 18:18:51 localhost kernel: [  134.461564] Exception 
stack(0xffffffc01027b750 to 0xffffffc01027b880)
Nov  3 18:18:51 localhost kernel: [  134.461566] b740: 
                 0000000000000000 0000008000000000
Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 
ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 
ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 
ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 
ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 
ffffffc0743fc000 000000000000005c 0000000000000004
Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 
000000000000003f 0000000000000000 00000000ffffffff
Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 
0000000000000000 ffffffc01027bab0 ffffffc01027bb98
Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 
0000000000000000 0000000000000000 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 
ffffffc076f8ac80 0000000000000000 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] 
meson_mmc_start_cmd+0x1c8/0x318
Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] 
meson_mmc_request+0x4c/0x98
Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] 
__mmc_start_request+0x50/0xf8
Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] 
mmc_start_request+0xf8/0x230
Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] 
mmc_wait_for_req+0x8c/0x100
Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] 
mmc_io_rw_extended+0x268/0x290
Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] 
sdio_io_rw_ext_helper+0xb8/0x1e8
Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] 
sdio_memcpy_toio+0x20/0x28
Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] 
brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] 
brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] 
brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] 
process_one_work+0x120/0x338
Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] 
worker_thread+0x50/0x440
Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] 
kthread+0xfc/0x128
Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] 
ret_from_fork+0x10/0x50

it seems that not every sg buffer is 64 bit aligned.
detection of the wlan adapter, firmware download and dhcp are always 
successful. just as ping (up to frame sizes of 1500 bytes)
i have the feeling, that only tcp packets trigger the warning

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 29.03.2017 16:29, Helmut Klein wrote:
> On 29.03.2017 07:46, Heiner Kallweit wrote:
>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>> which
>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>> card
>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>
>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>> plus
>>>>>>>>>>>>> the
>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>> ---
>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>
>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>> +};
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>> -};
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>> +{
>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>> +}
>>>>>>>>>>>>> +
>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>
>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>              }
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>          }
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>> -        }
>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>> +        }
>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>      else
>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>> irq,
>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>  {
>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>> -    }
>>>>>>>>>>>>> -
>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>> -    else
>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>  }
>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>  };
>>>>>>>>>>>>>
>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>> -
>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>      }
>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>
>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>
>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>
>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>> Especially as
>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>
>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>
>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>> This
>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>> regards
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>> configuration.
>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>
>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>
>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>  dmesg -D
>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>  sleep 1
>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>  sleep 1
>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>
>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>
>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>
>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>> patches
>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>
>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>> Response
>>>>>>>>>> timeout
>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>> rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x21
>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>> data:0x00
>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported
>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>> failed -19...
>>>>>>>>>>
>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>> rate
>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>> available.
>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>> ID: 0x4330
>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>> 00000000 00000000
>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>> data:0x28
>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>
>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>
>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>> the actual register value.
>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>> and
>>>>>>>>> send the log?
>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>> the issue.
>>>>>>>>>
>>>>>>>>> Rgds, Heiner
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>> mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>
>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>> %u\n", i,
>>>>>>>>> len);
>>>>>>>>> +
>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>
>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>> *dev_id)
>>>>>>>>>
>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>
>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>> +
>>>>>>>>>      cmd->error = 0;
>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>
>>>>>>>>
>>>>>>>> here is the output:
>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>> 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>> 721d0eb4
>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>> 00000000
>>>>>>>> 00000000
>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>> small read DMA returns
>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>
>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>> tackle this issue.
>>>>>>>
>>>>>>> Could you please replace the last logging extension patch with
>>>>>>> this one?
>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index ca685902..5b511944 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>
>>>>>>> +            if (cmd->opcode == 53)
>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>> +
>>>>>>>              if (data->blocks > 1)
>>>>>>>                  len /= data->blksz;
>>>>>>>
>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>> *dev_id)
>>>>>>>
>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>
>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>> +        dma_rmb();
>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>> host->descs[0].cmd_data);
>>>>>>> +    }
>>>>>>> +
>>>>>>>      cmd->error = 0;
>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>
>>>>>>
>>>>>> the output is not really different (for the 2 cmd53)
>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>
>>>>>> Helmut
>>>>>
>>>>>
>>>>> I've added my own debugging code to both variations of the driver.
>>>>> but without a positiv result
>>>>>
>>>>> here are the patches
>>>>>
>>>>> for the fully operational version
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>> 15:22:31.000000000 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>> 13:02:05.254762191 +0100
>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>
>>>>>      /* data? */
>>>>>      if (cmd->data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>          if (cmd->data->blocks > 1) {
>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>> 0x%08x",
>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>> +
>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>  }
>>>>>
>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>> irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> and this is for the version with the sdio problem
>>>>>
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>> 12:50:32.956474080 +0100
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>> 12:57:27.185837225 +0100
>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +
>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>      host->cmd = cmd;
>>>>>
>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>> +
>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>> 0x%08x",
>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>> +
>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>  }
>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>      status = raw_status & irq_en;
>>>>>
>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>> +
>>>>>      if (!status) {
>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>> irq_en=0x%08x\n",
>>>>>               raw_status, irq_en);
>>>>>
>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>> be a bug
>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>> very small
>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>> that level:
>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>> small
>>>> transfers.
>>>>
>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>> Let's try this as workaround.
>>>>
>>>> Could you please apply:
>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>> following:
>>>>
>>>>
>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>> index 4f9fafd3..cf9be13f 100644
>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>          return NULL;
>>>>  }
>>>>
>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>> +{
>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>> +           data->flags & MMC_DATA_READ;
>>>> +}
>>>> +
>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>> mmc_data *data)
>>>>  {
>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>> DMA_FROM_DEVICE;
>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>> *mmc, struct mmc_request *mrq)
>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>> mmc_request *mrq,
>>>>                     int err)
>>>>  {
>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>      struct mmc_data *data = mrq->data;
>>>>
>>>>      if (data && data->sg_count)
>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>                   meson_mmc_get_data_dir(data));
>>>> +
>>>> +    if (meson_mmc_small_read(data)) {
>>>> +        int cnt;
>>>> +
>>>> +        dma_rmb();
>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>> +        if (cnt != data->blksz)
>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>> +    }
>>>>  }
>>>>
>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>> clk_rate)
>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>      }
>>>>
>>>>      if (data) {
>>>> +        bool small_read = meson_mmc_small_read(data);
>>>> +
>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>
>>>>          if (data->blocks > 1) {
>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>              }
>>>>          }
>>>>
>>>> +        /*
>>>> +         * workaround for most likely hw bug
>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>> +        */
>>>> +        if (small_read)
>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>> +
>>>>          data->bytes_xfered = 0;
>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>> *mmc, struct mmc_command *cmd)
>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>              desc[i].cmd_arg = cmd->arg;
>>>>              desc[i].cmd_resp = 0;
>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>          }
>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> here is  the result:
>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>> addr=0x08000, nbytes=4
>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>> nsac 0
>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>> 00000000
>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>
>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>> nsac 0
>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>> 00000000
>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>> expected 0x16044330
>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>> rev=0
>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>> supported
>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>> failed!
>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>> failed
>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>
>>> the 1. cmd53 returned the correct data.
>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>> in the 1. cmd53)
>>>
>>> Helmut
>>>
>>
>> Hallo Helmut,
>>
>> next attempt .. After some more analysis I suspect a bug in SDIO core
>> regarding a not
>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>> for 64 bit DMA).
>>
>> I'd appreciate if you could test attached four patches on top of
>> latest next kernel.
>> Patches 1 + 2: smaller refactorings which have been submitted already
>> but are not applied yet
>> Patch 3: Fix for suspected issue in SDIO core
>> Patch 4: Switch to descriptor chain mode
>>
>> By the way, if you go with latest next kernel:
>> STMMAC ethernet driver is broken currently, I had to go back to
>> version from March 10th.
>>
>> Thanks in advance,
>> Heiner
>>
>
> Hallo Heiner,
>
> i've applied the 4 patches to the current linux-next.
>
> and
>
> i think, you did it!
>
> The adapter type is now detected und the firmware download succeeds.
>
> wlan0 gets an ip-address via dhcp.
>
> but: linux-next itself seems to have a problem with networking. even
> without having loaded
> meson-gx-mmc and brcmfmac the ethernet communication crashes.
> so i cannot do any further tests.
>
> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
> much better then with to old driver (none sg-list)
>
> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
> linux-next. But failed to compile it
>
>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>          mmc_get_dma_dir(data));
>          ^
>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
> ?dma_map_sg?
>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>
> Helmut
>
>

Hallo Heiner,

this evening i made some tests with linux-next. in the current version 
(2017-04-03)
your first two patches are already included. so i had to appl only 3 and 4.

tcp with the ethernet adpater is ok.

but with the wlan i get warnings
Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 
at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: 
brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core 
meson_gxbb_wdt evdev meson_ir rc_core
Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: 
kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon 
MiniMX (DT)
Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: 
brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 
task.stack: ffffffc010278000
Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at 
meson_mmc_start_cmd+0x1c8/0x318
Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at 
meson_mmc_request+0x4c/0x98
Nov  3 18:18:51 localhost kernel: [  134.461504] pc : 
[<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 
x28: 000000000000005c
Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 
x26: ffffffc072540ce0
Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 
x24: ffffffc01027bab0
Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 
x22: 00000000b54ca000
Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 
x20: ffffffc074348500
Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 
x18: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 
x16: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 
x14: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 
x12: 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 
x10: ffffff800053e508
Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 
x8 : ffffffc01027bab0
Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 
x6 : 0000000000000001
Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff 
x4 : 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f 
x2 : ffffffc01027ba90
Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 
x0 : 000000000000005c
Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace 
f9fa3cc8e4194a72 ]---
Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
Nov  3 18:18:51 localhost kernel: [  134.461564] Exception 
stack(0xffffffc01027b750 to 0xffffffc01027b880)
Nov  3 18:18:51 localhost kernel: [  134.461566] b740: 
                 0000000000000000 0000008000000000
Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 
ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 
ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 
ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 
ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 
ffffffc0743fc000 000000000000005c 0000000000000004
Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 
000000000000003f 0000000000000000 00000000ffffffff
Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 
0000000000000000 ffffffc01027bab0 ffffffc01027bb98
Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 
0000000000000000 0000000000000000 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 
ffffffc076f8ac80 0000000000000000 0000000000000000
Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] 
meson_mmc_start_cmd+0x1c8/0x318
Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] 
meson_mmc_request+0x4c/0x98
Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] 
__mmc_start_request+0x50/0xf8
Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] 
mmc_start_request+0xf8/0x230
Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] 
mmc_wait_for_req+0x8c/0x100
Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] 
mmc_io_rw_extended+0x268/0x290
Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] 
sdio_io_rw_ext_helper+0xb8/0x1e8
Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] 
sdio_memcpy_toio+0x20/0x28
Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] 
brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] 
brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] 
brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] 
process_one_work+0x120/0x338
Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] 
worker_thread+0x50/0x440
Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] 
kthread+0xfc/0x128
Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] 
ret_from_fork+0x10/0x50

it seems that not every sg buffer is 64 bit aligned.
detection of the wlan adapter, firmware download and dhcp are always 
successful. just as ping (up to frame sizes of 1500 bytes)
i have the feeling, that only tcp packets trigger the warning

Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 03.04.2017 um 21:50 schrieb Helmut Klein:
> On 29.03.2017 16:29, Helmut Klein wrote:
>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>> the
>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>> Especially as
>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>
>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>
>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>> This
>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>> configuration.
>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>
>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>
>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>
>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>
>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>
>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>> patches
>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>
>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x21
>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>> data:0x00
>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported
>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>> failed -19...
>>>>>>>>>>>
>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>
>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>
>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>> the actual register value.
>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>> and
>>>>>>>>>> send the log?
>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>> the issue.
>>>>>>>>>>
>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>> mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>
>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>> %u\n", i,
>>>>>>>>>> len);
>>>>>>>>>> +
>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>
>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>> *dev_id)
>>>>>>>>>>
>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>
>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>> +
>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> here is the output:
>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>> 721d0eb4
>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000
>>>>>>>>> 00000000
>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>> small read DMA returns
>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>
>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>> tackle this issue.
>>>>>>>>
>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>> this one?
>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index ca685902..5b511944 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>
>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>> +
>>>>>>>>              if (data->blocks > 1)
>>>>>>>>                  len /= data->blksz;
>>>>>>>>
>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>> *dev_id)
>>>>>>>>
>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>
>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>> +        dma_rmb();
>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>> host->descs[0].cmd_data);
>>>>>>>> +    }
>>>>>>>> +
>>>>>>>>      cmd->error = 0;
>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>
>>>>>>>
>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>
>>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>> but without a positiv result
>>>>>>
>>>>>> here are the patches
>>>>>>
>>>>>> for the fully operational version
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>> 15:22:31.000000000 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 13:02:05.254762191 +0100
>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>
>>>>>>      /* data? */
>>>>>>      if (cmd->data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>> +
>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>  }
>>>>>>
>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> and this is for the version with the sdio problem
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:50:32.956474080 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:57:27.185837225 +0100
>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      }
>>>>>>
>>>>>>      if (data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>
>>>>>>          if (data->blocks > 1) {
>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      host->cmd = cmd;
>>>>>>
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>> +
>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>  }
>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>> be a bug
>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>> very small
>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>> that level:
>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>> small
>>>>> transfers.
>>>>>
>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>> Let's try this as workaround.
>>>>>
>>>>> Could you please apply:
>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>> following:
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 4f9fafd3..cf9be13f 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>          return NULL;
>>>>>  }
>>>>>
>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>> +{
>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>> +           data->flags & MMC_DATA_READ;
>>>>> +}
>>>>> +
>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>> mmc_data *data)
>>>>>  {
>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>> DMA_FROM_DEVICE;
>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>> *mmc, struct mmc_request *mrq)
>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>> mmc_request *mrq,
>>>>>                     int err)
>>>>>  {
>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>      struct mmc_data *data = mrq->data;
>>>>>
>>>>>      if (data && data->sg_count)
>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>                   meson_mmc_get_data_dir(data));
>>>>> +
>>>>> +    if (meson_mmc_small_read(data)) {
>>>>> +        int cnt;
>>>>> +
>>>>> +        dma_rmb();
>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>> +        if (cnt != data->blksz)
>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>> +    }
>>>>>  }
>>>>>
>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>> clk_rate)
>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>              }
>>>>>          }
>>>>>
>>>>> +        /*
>>>>> +         * workaround for most likely hw bug
>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>> +        */
>>>>> +        if (small_read)
>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>> +
>>>>>          data->bytes_xfered = 0;
>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>              desc[i].cmd_resp = 0;
>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>          }
>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> here is  the result:
>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>> addr=0x08000, nbytes=4
>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>
>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>> expected 0x16044330
>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>> rev=0
>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>> supported
>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>> failed!
>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>> failed
>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>
>>>> the 1. cmd53 returned the correct data.
>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>> in the 1. cmd53)
>>>>
>>>> Helmut
>>>>
>>>
>>> Hallo Helmut,
>>>
>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>> regarding a not
>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>> for 64 bit DMA).
>>>
>>> I'd appreciate if you could test attached four patches on top of
>>> latest next kernel.
>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>> but are not applied yet
>>> Patch 3: Fix for suspected issue in SDIO core
>>> Patch 4: Switch to descriptor chain mode
>>>
>>> By the way, if you go with latest next kernel:
>>> STMMAC ethernet driver is broken currently, I had to go back to
>>> version from March 10th.
>>>
>>> Thanks in advance,
>>> Heiner
>>>
>>
>> Hallo Heiner,
>>
>> i've applied the 4 patches to the current linux-next.
>>
>> and
>>
>> i think, you did it!
>>
>> The adapter type is now detected und the firmware download succeeds.
>>
>> wlan0 gets an ip-address via dhcp.
>>
>> but: linux-next itself seems to have a problem with networking. even
>> without having loaded
>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>> so i cannot do any further tests.
>>
>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>> much better then with to old driver (none sg-list)
>>
>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>> linux-next. But failed to compile it
>>
>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>          mmc_get_dma_dir(data));
>>          ^
>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>> ‘dma_map_sg’
>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>
>> Helmut
>>
>>
> 
> Hallo Heiner,
> 
> this evening i made some tests with linux-next. in the current version (2017-04-03)
> your first two patches are already included. so i had to appl only 3 and 4.
> 
> tcp with the ethernet adpater is ok.
> 
> but with the wlan i get warnings
> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> 
> it seems that not every sg buffer is 64 bit aligned.
> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
> i have the feeling, that only tcp packets trigger the warning
> 
> Helmut
> 
Thanks for reporting. Indeed it seems that fixing the DMA scratch buffer
in struct sdio_func was a necessary step but isn't sufficient.
Obviously drivers don't care much about alignment when providing a buffer
(which potentially is used for DMA) to sdio_memcopy_to(from)_io.

I will have to look at it. One option could be to use a properly aligned
bounce buffer if we detect a unaligned buffer.

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 03.04.2017 um 21:50 schrieb Helmut Klein:
> On 29.03.2017 16:29, Helmut Klein wrote:
>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>> the
>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>> Especially as
>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>
>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>
>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>> This
>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>> configuration.
>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>
>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>
>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>
>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>
>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>
>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>> patches
>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>
>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x21
>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>> data:0x00
>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported
>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>> failed -19...
>>>>>>>>>>>
>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>
>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>
>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>> the actual register value.
>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>> and
>>>>>>>>>> send the log?
>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>> the issue.
>>>>>>>>>>
>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>> mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>
>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>> %u\n", i,
>>>>>>>>>> len);
>>>>>>>>>> +
>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>
>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>> *dev_id)
>>>>>>>>>>
>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>
>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>> +
>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> here is the output:
>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>> 721d0eb4
>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000
>>>>>>>>> 00000000
>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>> small read DMA returns
>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>
>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>> tackle this issue.
>>>>>>>>
>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>> this one?
>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index ca685902..5b511944 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>
>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>> +
>>>>>>>>              if (data->blocks > 1)
>>>>>>>>                  len /= data->blksz;
>>>>>>>>
>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>> *dev_id)
>>>>>>>>
>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>
>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>> +        dma_rmb();
>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>> host->descs[0].cmd_data);
>>>>>>>> +    }
>>>>>>>> +
>>>>>>>>      cmd->error = 0;
>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>
>>>>>>>
>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>
>>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>> but without a positiv result
>>>>>>
>>>>>> here are the patches
>>>>>>
>>>>>> for the fully operational version
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>> 15:22:31.000000000 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 13:02:05.254762191 +0100
>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>
>>>>>>      /* data? */
>>>>>>      if (cmd->data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>> +
>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>  }
>>>>>>
>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> and this is for the version with the sdio problem
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:50:32.956474080 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:57:27.185837225 +0100
>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      }
>>>>>>
>>>>>>      if (data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>
>>>>>>          if (data->blocks > 1) {
>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      host->cmd = cmd;
>>>>>>
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>> +
>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>  }
>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>> be a bug
>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>> very small
>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>> that level:
>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>> small
>>>>> transfers.
>>>>>
>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>> Let's try this as workaround.
>>>>>
>>>>> Could you please apply:
>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>> following:
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 4f9fafd3..cf9be13f 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>          return NULL;
>>>>>  }
>>>>>
>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>> +{
>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>> +           data->flags & MMC_DATA_READ;
>>>>> +}
>>>>> +
>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>> mmc_data *data)
>>>>>  {
>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>> DMA_FROM_DEVICE;
>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>> *mmc, struct mmc_request *mrq)
>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>> mmc_request *mrq,
>>>>>                     int err)
>>>>>  {
>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>      struct mmc_data *data = mrq->data;
>>>>>
>>>>>      if (data && data->sg_count)
>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>                   meson_mmc_get_data_dir(data));
>>>>> +
>>>>> +    if (meson_mmc_small_read(data)) {
>>>>> +        int cnt;
>>>>> +
>>>>> +        dma_rmb();
>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>> +        if (cnt != data->blksz)
>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>> +    }
>>>>>  }
>>>>>
>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>> clk_rate)
>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>              }
>>>>>          }
>>>>>
>>>>> +        /*
>>>>> +         * workaround for most likely hw bug
>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>> +        */
>>>>> +        if (small_read)
>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>> +
>>>>>          data->bytes_xfered = 0;
>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>              desc[i].cmd_resp = 0;
>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>          }
>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> here is  the result:
>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>> addr=0x08000, nbytes=4
>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>
>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>> expected 0x16044330
>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>> rev=0
>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>> supported
>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>> failed!
>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>> failed
>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>
>>>> the 1. cmd53 returned the correct data.
>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>> in the 1. cmd53)
>>>>
>>>> Helmut
>>>>
>>>
>>> Hallo Helmut,
>>>
>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>> regarding a not
>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>> for 64 bit DMA).
>>>
>>> I'd appreciate if you could test attached four patches on top of
>>> latest next kernel.
>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>> but are not applied yet
>>> Patch 3: Fix for suspected issue in SDIO core
>>> Patch 4: Switch to descriptor chain mode
>>>
>>> By the way, if you go with latest next kernel:
>>> STMMAC ethernet driver is broken currently, I had to go back to
>>> version from March 10th.
>>>
>>> Thanks in advance,
>>> Heiner
>>>
>>
>> Hallo Heiner,
>>
>> i've applied the 4 patches to the current linux-next.
>>
>> and
>>
>> i think, you did it!
>>
>> The adapter type is now detected und the firmware download succeeds.
>>
>> wlan0 gets an ip-address via dhcp.
>>
>> but: linux-next itself seems to have a problem with networking. even
>> without having loaded
>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>> so i cannot do any further tests.
>>
>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>> much better then with to old driver (none sg-list)
>>
>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>> linux-next. But failed to compile it
>>
>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>          mmc_get_dma_dir(data));
>>          ^
>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>> ?dma_map_sg?
>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>
>> Helmut
>>
>>
> 
> Hallo Heiner,
> 
> this evening i made some tests with linux-next. in the current version (2017-04-03)
> your first two patches are already included. so i had to appl only 3 and 4.
> 
> tcp with the ethernet adpater is ok.
> 
> but with the wlan i get warnings
> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> 
> it seems that not every sg buffer is 64 bit aligned.
> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
> i have the feeling, that only tcp packets trigger the warning
> 
> Helmut
> 
Thanks for reporting. Indeed it seems that fixing the DMA scratch buffer
in struct sdio_func was a necessary step but isn't sufficient.
Obviously drivers don't care much about alignment when providing a buffer
(which potentially is used for DMA) to sdio_memcopy_to(from)_io.

I will have to look at it. One option could be to use a properly aligned
bounce buffer if we detect a unaligned buffer.

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 03.04.2017 um 21:50 schrieb Helmut Klein:
> On 29.03.2017 16:29, Helmut Klein wrote:
>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>> the
>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>> Especially as
>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>
>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>
>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>> This
>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>> configuration.
>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>
>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>
>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>
>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>
>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>
>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>> patches
>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>
>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x21
>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>> data:0x00
>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported
>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>> failed -19...
>>>>>>>>>>>
>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>
>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>
>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>> the actual register value.
>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>> and
>>>>>>>>>> send the log?
>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>> the issue.
>>>>>>>>>>
>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>> mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>
>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>> %u\n", i,
>>>>>>>>>> len);
>>>>>>>>>> +
>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>
>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>> *dev_id)
>>>>>>>>>>
>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>
>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>> +
>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> here is the output:
>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>> 721d0eb4
>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000
>>>>>>>>> 00000000
>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>> small read DMA returns
>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>
>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>> tackle this issue.
>>>>>>>>
>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>> this one?
>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index ca685902..5b511944 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>
>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>> +
>>>>>>>>              if (data->blocks > 1)
>>>>>>>>                  len /= data->blksz;
>>>>>>>>
>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>> *dev_id)
>>>>>>>>
>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>
>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>> +        dma_rmb();
>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>> host->descs[0].cmd_data);
>>>>>>>> +    }
>>>>>>>> +
>>>>>>>>      cmd->error = 0;
>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>
>>>>>>>
>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>
>>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>> but without a positiv result
>>>>>>
>>>>>> here are the patches
>>>>>>
>>>>>> for the fully operational version
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>> 15:22:31.000000000 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 13:02:05.254762191 +0100
>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>
>>>>>>      /* data? */
>>>>>>      if (cmd->data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>> +
>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>  }
>>>>>>
>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> and this is for the version with the sdio problem
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:50:32.956474080 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:57:27.185837225 +0100
>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      }
>>>>>>
>>>>>>      if (data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>
>>>>>>          if (data->blocks > 1) {
>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      host->cmd = cmd;
>>>>>>
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>> +
>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>  }
>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>> be a bug
>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>> very small
>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>> that level:
>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>> small
>>>>> transfers.
>>>>>
>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>> Let's try this as workaround.
>>>>>
>>>>> Could you please apply:
>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>> following:
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 4f9fafd3..cf9be13f 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>          return NULL;
>>>>>  }
>>>>>
>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>> +{
>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>> +           data->flags & MMC_DATA_READ;
>>>>> +}
>>>>> +
>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>> mmc_data *data)
>>>>>  {
>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>> DMA_FROM_DEVICE;
>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>> *mmc, struct mmc_request *mrq)
>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>> mmc_request *mrq,
>>>>>                     int err)
>>>>>  {
>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>      struct mmc_data *data = mrq->data;
>>>>>
>>>>>      if (data && data->sg_count)
>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>                   meson_mmc_get_data_dir(data));
>>>>> +
>>>>> +    if (meson_mmc_small_read(data)) {
>>>>> +        int cnt;
>>>>> +
>>>>> +        dma_rmb();
>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>> +        if (cnt != data->blksz)
>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>> +    }
>>>>>  }
>>>>>
>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>> clk_rate)
>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>              }
>>>>>          }
>>>>>
>>>>> +        /*
>>>>> +         * workaround for most likely hw bug
>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>> +        */
>>>>> +        if (small_read)
>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>> +
>>>>>          data->bytes_xfered = 0;
>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>              desc[i].cmd_resp = 0;
>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>          }
>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> here is  the result:
>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>> addr=0x08000, nbytes=4
>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>
>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>> expected 0x16044330
>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>> rev=0
>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>> supported
>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>> failed!
>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>> failed
>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>
>>>> the 1. cmd53 returned the correct data.
>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>> in the 1. cmd53)
>>>>
>>>> Helmut
>>>>
>>>
>>> Hallo Helmut,
>>>
>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>> regarding a not
>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>> for 64 bit DMA).
>>>
>>> I'd appreciate if you could test attached four patches on top of
>>> latest next kernel.
>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>> but are not applied yet
>>> Patch 3: Fix for suspected issue in SDIO core
>>> Patch 4: Switch to descriptor chain mode
>>>
>>> By the way, if you go with latest next kernel:
>>> STMMAC ethernet driver is broken currently, I had to go back to
>>> version from March 10th.
>>>
>>> Thanks in advance,
>>> Heiner
>>>
>>
>> Hallo Heiner,
>>
>> i've applied the 4 patches to the current linux-next.
>>
>> and
>>
>> i think, you did it!
>>
>> The adapter type is now detected und the firmware download succeeds.
>>
>> wlan0 gets an ip-address via dhcp.
>>
>> but: linux-next itself seems to have a problem with networking. even
>> without having loaded
>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>> so i cannot do any further tests.
>>
>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>> much better then with to old driver (none sg-list)
>>
>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>> linux-next. But failed to compile it
>>
>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>          mmc_get_dma_dir(data));
>>          ^
>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>> ‘dma_map_sg’
>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>
>> Helmut
>>
>>
> 
> Hallo Heiner,
> 
> this evening i made some tests with linux-next. in the current version (2017-04-03)
> your first two patches are already included. so i had to appl only 3 and 4.
> 
> tcp with the ethernet adpater is ok.
> 
> but with the wlan i get warnings
> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> 
> it seems that not every sg buffer is 64 bit aligned.
> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
> i have the feeling, that only tcp packets trigger the warning
> 
> Helmut
> 

Hallo Helmut,

I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
before the WARN_ON trace.

Thanks, Heiner

diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
index d40744bb..15cf9820 100644
--- a/drivers/mmc/core/sdio_io.c
+++ b/drivers/mmc/core/sdio_io.c
@@ -14,6 +14,7 @@
 #include <linux/mmc/card.h>
 #include <linux/mmc/sdio.h>
 #include <linux/mmc/sdio_func.h>
+#include <linux/mm.h>
 
 #include "sdio_ops.h"
 #include "core.h"
@@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 	unsigned remainder = size;
 	unsigned max_blocks;
 	int ret;
+	void *buf_orig = buf;
+	unsigned size_orig = size;
 
 	if (!func || (func->num > 7))
 		return -EINVAL;
 
+	if (is_vmalloc_addr(buf))
+		pr_err("sdio: buffer is vmalloc memory\n");
+
+	if (((unsigned long)buf) & 7)
+		pr_err("sdio: buffer %p is not aligned\n", buf);
+
 	/* Do the bulk of the transfer using block mode (if supported). */
 	if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
 		/* Blocks per command is limited by host count, host transfer
@@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 				blocks = max_blocks;
 			size = blocks * func->cur_blksize;
 
+			if (((unsigned long)buf) & 7)
+				pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
+				       buf_orig, size_orig, buf, blocks, func->cur_blksize);
+
 			ret = mmc_io_rw_extended(func->card, write,
 				func->num, addr, incr_addr, buf,
 				blocks, func->cur_blksize);
@@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 	while (remainder > 0) {
 		size = min(remainder, sdio_max_byte_size(func));
 
+		if (((unsigned long)buf) & 7)
+			pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
+			       buf_orig, size_orig, buf, 0, size, func->cur_blksize);
+
 		/* Indicate byte mode by setting "blocks" = 0 */
 		ret = mmc_io_rw_extended(func->card, write, func->num, addr,
 			 incr_addr, buf, 0, size);
-- 
2.12.1

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 03.04.2017 um 21:50 schrieb Helmut Klein:
> On 29.03.2017 16:29, Helmut Klein wrote:
>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>> the
>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> -
>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>> Especially as
>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>
>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>
>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>> This
>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>> regards
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>> configuration.
>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>
>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>
>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>  sleep 1
>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>
>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>
>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>
>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>> patches
>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>
>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>> Response
>>>>>>>>>>> timeout
>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x21
>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>> data:0x00
>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported
>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>> failed -19...
>>>>>>>>>>>
>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>> rate
>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>> available.
>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>> data:0x28
>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>
>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>
>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>> the actual register value.
>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>> and
>>>>>>>>>> send the log?
>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>> the issue.
>>>>>>>>>>
>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>> mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>
>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>> %u\n", i,
>>>>>>>>>> len);
>>>>>>>>>> +
>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>
>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>> *dev_id)
>>>>>>>>>>
>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>
>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>> +
>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> here is the output:
>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>> 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>> 721d0eb4
>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>> 00000000
>>>>>>>>> 00000000
>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>> small read DMA returns
>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>
>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>> tackle this issue.
>>>>>>>>
>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>> this one?
>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>
>>>>>>>> Thanks, Heiner
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index ca685902..5b511944 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>
>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>> +
>>>>>>>>              if (data->blocks > 1)
>>>>>>>>                  len /= data->blksz;
>>>>>>>>
>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>> *dev_id)
>>>>>>>>
>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>
>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>> +        dma_rmb();
>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>> host->descs[0].cmd_data);
>>>>>>>> +    }
>>>>>>>> +
>>>>>>>>      cmd->error = 0;
>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>
>>>>>>>
>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>
>>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>> but without a positiv result
>>>>>>
>>>>>> here are the patches
>>>>>>
>>>>>> for the fully operational version
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>> 15:22:31.000000000 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 13:02:05.254762191 +0100
>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>
>>>>>>      /* data? */
>>>>>>      if (cmd->data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>> +
>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>  }
>>>>>>
>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> and this is for the version with the sdio problem
>>>>>>
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:50:32.956474080 +0100
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>> 12:57:27.185837225 +0100
>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      }
>>>>>>
>>>>>>      if (data) {
>>>>>> +
>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>> +
>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>
>>>>>>          if (data->blocks > 1) {
>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>      host->cmd = cmd;
>>>>>>
>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>> +
>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>> 0x%08x",
>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>> +
>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>  }
>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>      status = raw_status & irq_en;
>>>>>>
>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>> +
>>>>>>      if (!status) {
>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>> irq_en=0x%08x\n",
>>>>>>               raw_status, irq_en);
>>>>>>
>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>> be a bug
>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>> very small
>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>> that level:
>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>> small
>>>>> transfers.
>>>>>
>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>> Let's try this as workaround.
>>>>>
>>>>> Could you please apply:
>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>> following:
>>>>>
>>>>>
>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>> index 4f9fafd3..cf9be13f 100644
>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>          return NULL;
>>>>>  }
>>>>>
>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>> +{
>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>> +           data->flags & MMC_DATA_READ;
>>>>> +}
>>>>> +
>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>> mmc_data *data)
>>>>>  {
>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>> DMA_FROM_DEVICE;
>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>> *mmc, struct mmc_request *mrq)
>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>> mmc_request *mrq,
>>>>>                     int err)
>>>>>  {
>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>      struct mmc_data *data = mrq->data;
>>>>>
>>>>>      if (data && data->sg_count)
>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>                   meson_mmc_get_data_dir(data));
>>>>> +
>>>>> +    if (meson_mmc_small_read(data)) {
>>>>> +        int cnt;
>>>>> +
>>>>> +        dma_rmb();
>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>> +        if (cnt != data->blksz)
>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>> +    }
>>>>>  }
>>>>>
>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>> clk_rate)
>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>      }
>>>>>
>>>>>      if (data) {
>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>> +
>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>
>>>>>          if (data->blocks > 1) {
>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>              }
>>>>>          }
>>>>>
>>>>> +        /*
>>>>> +         * workaround for most likely hw bug
>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>> +        */
>>>>> +        if (small_read)
>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>> +
>>>>>          data->bytes_xfered = 0;
>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>> *mmc, struct mmc_command *cmd)
>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>              desc[i].cmd_resp = 0;
>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>          }
>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> here is  the result:
>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>> addr=0x08000, nbytes=4
>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>
>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>> nsac 0
>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>> 00000000
>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>> expected 0x16044330
>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>> rev=0
>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>> supported
>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>> failed!
>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>> failed
>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>
>>>> the 1. cmd53 returned the correct data.
>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>> in the 1. cmd53)
>>>>
>>>> Helmut
>>>>
>>>
>>> Hallo Helmut,
>>>
>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>> regarding a not
>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>> for 64 bit DMA).
>>>
>>> I'd appreciate if you could test attached four patches on top of
>>> latest next kernel.
>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>> but are not applied yet
>>> Patch 3: Fix for suspected issue in SDIO core
>>> Patch 4: Switch to descriptor chain mode
>>>
>>> By the way, if you go with latest next kernel:
>>> STMMAC ethernet driver is broken currently, I had to go back to
>>> version from March 10th.
>>>
>>> Thanks in advance,
>>> Heiner
>>>
>>
>> Hallo Heiner,
>>
>> i've applied the 4 patches to the current linux-next.
>>
>> and
>>
>> i think, you did it!
>>
>> The adapter type is now detected und the firmware download succeeds.
>>
>> wlan0 gets an ip-address via dhcp.
>>
>> but: linux-next itself seems to have a problem with networking. even
>> without having loaded
>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>> so i cannot do any further tests.
>>
>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>> much better then with to old driver (none sg-list)
>>
>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>> linux-next. But failed to compile it
>>
>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>          mmc_get_dma_dir(data));
>>          ^
>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>> ?dma_map_sg?
>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>
>> Helmut
>>
>>
> 
> Hallo Heiner,
> 
> this evening i made some tests with linux-next. in the current version (2017-04-03)
> your first two patches are already included. so i had to appl only 3 and 4.
> 
> tcp with the ethernet adpater is ok.
> 
> but with the wlan i get warnings
> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> 
> it seems that not every sg buffer is 64 bit aligned.
> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
> i have the feeling, that only tcp packets trigger the warning
> 
> Helmut
> 

Hallo Helmut,

I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
before the WARN_ON trace.

Thanks, Heiner

diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
index d40744bb..15cf9820 100644
--- a/drivers/mmc/core/sdio_io.c
+++ b/drivers/mmc/core/sdio_io.c
@@ -14,6 +14,7 @@
 #include <linux/mmc/card.h>
 #include <linux/mmc/sdio.h>
 #include <linux/mmc/sdio_func.h>
+#include <linux/mm.h>
 
 #include "sdio_ops.h"
 #include "core.h"
@@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 	unsigned remainder = size;
 	unsigned max_blocks;
 	int ret;
+	void *buf_orig = buf;
+	unsigned size_orig = size;
 
 	if (!func || (func->num > 7))
 		return -EINVAL;
 
+	if (is_vmalloc_addr(buf))
+		pr_err("sdio: buffer is vmalloc memory\n");
+
+	if (((unsigned long)buf) & 7)
+		pr_err("sdio: buffer %p is not aligned\n", buf);
+
 	/* Do the bulk of the transfer using block mode (if supported). */
 	if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
 		/* Blocks per command is limited by host count, host transfer
@@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 				blocks = max_blocks;
 			size = blocks * func->cur_blksize;
 
+			if (((unsigned long)buf) & 7)
+				pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
+				       buf_orig, size_orig, buf, blocks, func->cur_blksize);
+
 			ret = mmc_io_rw_extended(func->card, write,
 				func->num, addr, incr_addr, buf,
 				blocks, func->cur_blksize);
@@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 	while (remainder > 0) {
 		size = min(remainder, sdio_max_byte_size(func));
 
+		if (((unsigned long)buf) & 7)
+			pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
+			       buf_orig, size_orig, buf, 0, size, func->cur_blksize);
+
 		/* Indicate byte mode by setting "blocks" = 0 */
 		ret = mmc_io_rw_extended(func->card, write, func->num, addr,
 			 incr_addr, buf, 0, size);
-- 
2.12.1

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 04.04.2017 19:37, Heiner Kallweit wrote:
> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>> On 29.03.2017 16:29, Helmut Klein wrote:
>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>
>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>> This
>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>> configuration.
>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>
>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>
>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>
>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>
>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>
>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>> patches
>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>
>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>> rate
>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>> available.
>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>> supported
>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>
>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>> rate
>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>> available.
>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>
>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>
>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>> the actual register value.
>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>> and
>>>>>>>>>>> send the log?
>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>> the issue.
>>>>>>>>>>>
>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>> mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>
>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>> %u\n", i,
>>>>>>>>>>> len);
>>>>>>>>>>> +
>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>
>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>> *dev_id)
>>>>>>>>>>>
>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>
>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>> +
>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> here is the output:
>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>> 721d0eb4
>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>> small read DMA returns
>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>
>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>> tackle this issue.
>>>>>>>>>
>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>> this one?
>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>
>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>> +
>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>
>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>> *dev_id)
>>>>>>>>>
>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>
>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>> +        dma_rmb();
>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>> +    }
>>>>>>>>> +
>>>>>>>>>      cmd->error = 0;
>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>
>>>>>>>>
>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>> but without a positiv result
>>>>>>>
>>>>>>> here are the patches
>>>>>>>
>>>>>>> for the fully operational version
>>>>>>>
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>> 15:22:31.000000000 +0100
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>> 13:02:05.254762191 +0100
>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>
>>>>>>>      /* data? */
>>>>>>>      if (cmd->data) {
>>>>>>> +
>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>> +
>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>> +
>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>> 0x%08x",
>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>> +
>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>  }
>>>>>>>
>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>      status = raw_status & irq_en;
>>>>>>>
>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>> +
>>>>>>>      if (!status) {
>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>> irq_en=0x%08x\n",
>>>>>>>               raw_status, irq_en);
>>>>>>>
>>>>>>> and this is for the version with the sdio problem
>>>>>>>
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>> 12:50:32.956474080 +0100
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>> 12:57:27.185837225 +0100
>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>      }
>>>>>>>
>>>>>>>      if (data) {
>>>>>>> +
>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>> +
>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>
>>>>>>>          if (data->blocks > 1) {
>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>      host->cmd = cmd;
>>>>>>>
>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>> +
>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>> 0x%08x",
>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>> +
>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>  }
>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>      status = raw_status & irq_en;
>>>>>>>
>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>> +
>>>>>>>      if (!status) {
>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>> irq_en=0x%08x\n",
>>>>>>>               raw_status, irq_en);
>>>>>>>
>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>> be a bug
>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>> very small
>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>> that level:
>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>> small
>>>>>> transfers.
>>>>>>
>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>> Let's try this as workaround.
>>>>>>
>>>>>> Could you please apply:
>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>> following:
>>>>>>
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>          return NULL;
>>>>>>  }
>>>>>>
>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>> +{
>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>> +}
>>>>>> +
>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>> mmc_data *data)
>>>>>>  {
>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>> DMA_FROM_DEVICE;
>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>> mmc_request *mrq,
>>>>>>                     int err)
>>>>>>  {
>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>
>>>>>>      if (data && data->sg_count)
>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>> +
>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>> +        int cnt;
>>>>>> +
>>>>>> +        dma_rmb();
>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>> +        if (cnt != data->blksz)
>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>> +    }
>>>>>>  }
>>>>>>
>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>> clk_rate)
>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>      }
>>>>>>
>>>>>>      if (data) {
>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>> +
>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>
>>>>>>          if (data->blocks > 1) {
>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>              }
>>>>>>          }
>>>>>>
>>>>>> +        /*
>>>>>> +         * workaround for most likely hw bug
>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>> +        */
>>>>>> +        if (small_read)
>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>> +
>>>>>>          data->bytes_xfered = 0;
>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>              desc[i].cmd_resp = 0;
>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>          }
>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> here is  the result:
>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>> nsac 0
>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>> 00000000
>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>
>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>> nsac 0
>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>> 00000000
>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>> expected 0x16044330
>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>> rev=0
>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>> supported
>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>> failed!
>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>> failed
>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>
>>>>> the 1. cmd53 returned the correct data.
>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>> in the 1. cmd53)
>>>>>
>>>>> Helmut
>>>>>
>>>>
>>>> Hallo Helmut,
>>>>
>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>> regarding a not
>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>> for 64 bit DMA).
>>>>
>>>> I'd appreciate if you could test attached four patches on top of
>>>> latest next kernel.
>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>> but are not applied yet
>>>> Patch 3: Fix for suspected issue in SDIO core
>>>> Patch 4: Switch to descriptor chain mode
>>>>
>>>> By the way, if you go with latest next kernel:
>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>> version from March 10th.
>>>>
>>>> Thanks in advance,
>>>> Heiner
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> i've applied the 4 patches to the current linux-next.
>>>
>>> and
>>>
>>> i think, you did it!
>>>
>>> The adapter type is now detected und the firmware download succeeds.
>>>
>>> wlan0 gets an ip-address via dhcp.
>>>
>>> but: linux-next itself seems to have a problem with networking. even
>>> without having loaded
>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>> so i cannot do any further tests.
>>>
>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>> much better then with to old driver (none sg-list)
>>>
>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>> linux-next. But failed to compile it
>>>
>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>          mmc_get_dma_dir(data));
>>>          ^
>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>> ‘dma_map_sg’
>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>
>>> Helmut
>>>
>>>
>>
>> Hallo Heiner,
>>
>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>> your first two patches are already included. so i had to appl only 3 and 4.
>>
>> tcp with the ethernet adpater is ok.
>>
>> but with the wlan i get warnings
>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>
>> it seems that not every sg buffer is 64 bit aligned.
>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>> i have the feeling, that only tcp packets trigger the warning
>>
>> Helmut
>>
>
> Hallo Helmut,
>
> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
> before the WARN_ON trace.
>
> Thanks, Heiner
>
> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
> index d40744bb..15cf9820 100644
> --- a/drivers/mmc/core/sdio_io.c
> +++ b/drivers/mmc/core/sdio_io.c
> @@ -14,6 +14,7 @@
>  #include <linux/mmc/card.h>
>  #include <linux/mmc/sdio.h>
>  #include <linux/mmc/sdio_func.h>
> +#include <linux/mm.h>
>
>  #include "sdio_ops.h"
>  #include "core.h"
> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>  	unsigned remainder = size;
>  	unsigned max_blocks;
>  	int ret;
> +	void *buf_orig = buf;
> +	unsigned size_orig = size;
>
>  	if (!func || (func->num > 7))
>  		return -EINVAL;
>
> +	if (is_vmalloc_addr(buf))
> +		pr_err("sdio: buffer is vmalloc memory\n");
> +
> +	if (((unsigned long)buf) & 7)
> +		pr_err("sdio: buffer %p is not aligned\n", buf);
> +
>  	/* Do the bulk of the transfer using block mode (if supported). */
>  	if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>  		/* Blocks per command is limited by host count, host transfer
> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>  				blocks = max_blocks;
>  			size = blocks * func->cur_blksize;
>
> +			if (((unsigned long)buf) & 7)
> +				pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
> +				       buf_orig, size_orig, buf, blocks, func->cur_blksize);
> +
>  			ret = mmc_io_rw_extended(func->card, write,
>  				func->num, addr, incr_addr, buf,
>  				blocks, func->cur_blksize);
> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>  	while (remainder > 0) {
>  		size = min(remainder, sdio_max_byte_size(func));
>
> +		if (((unsigned long)buf) & 7)
> +			pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
> +			       buf_orig, size_orig, buf, 0, size, func->cur_blksize);
> +
>  		/* Indicate byte mode by setting "blocks" = 0 */
>  		ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>  			 incr_addr, buf, 0, size);
>

Hallo Heiner,

this is the ouput
[   58.509474] sdio: buffer ffffffc073c4448c is not aligned
[   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: 
ffffffc073c4448c blocks: 0 size: 84 blksz: 512
[   58.519115] ------------[ cut here ]------------
[   58.519130] WARNING: CPU: 0 PID: 5 at 
drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
[   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder 
brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
[   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 
4.11.0-rc5-next-20170403+ #7
[   58.519154] Hardware name: Netxeon MiniMX (DT)
[   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker 
[brcmfmac]
[   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
[   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
[   58.519280] LR is at meson_mmc_request+0x4c/0x98
[   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] 
pstate: 20000145
[   58.519283] sp : ffffffc01027b910
[   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
[   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
[   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
[   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
[   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
[   58.519302] x19: 0000000000000000 x18: 0000000000000006
[   58.519306] x17: 0000000000000000 x16: 0000000000000000
[   58.519309] x15: ffffff80086f373d x14: 3463333730636666
[   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
[   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
[   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
[   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
[   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
[   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
[   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
[   58.519364] ---[ end trace 22523b85322e1fa4 ]---
[   58.519366] Call trace:
[   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
[   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 
ffffff8008393390
[   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 
ffffff8008573945
[   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 
ffffff80086f3730
[   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 
ffffff80086b7a60
[   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 
0000000000000000
[   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 
000000000000003f
[   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 
0000000000000000
[   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 
726f5f657a697320
[   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 
ffffff80086f373d
[   58.519401] b860: 0000000000000000 0000000000000000
[   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
[   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
[   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
[   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
[   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
[   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
[   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
[   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
[   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 
[brcmfmac]
[   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 
[brcmfmac]
[   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 
[brcmfmac]
[   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
[   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
[   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
[   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
[   59.517967] sdio: buffer ffffffc073c4448c is not aligned
[   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: 
ffffffc073c4448c blocks: 0 size: 84 blksz: 512


[  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
[  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: 
ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
[  242.586996] ------------[ cut here ]------------
[  242.587010] WARNING: CPU: 0 PID: 5 at 
drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
[  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder 
brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
[  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 
4.11.0-rc5-next-20170403+ #7
[  242.587036] Hardware name: Netxeon MiniMX (DT)
[  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker 
[brcmfmac]
[  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
[  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
[  242.587162] LR is at meson_mmc_request+0x4c/0x98
[  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] 
pstate: 20000145
[  242.587166] sp : ffffffc01027b910
[  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
[  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
[  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
[  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
[  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
[  242.587197] x19: 0000000000000000 x18: 0000000000000006
[  242.587200] x17: 0000000000000000 x16: 0000000000000000
[  242.587208] x15: ffffff80086f373d x14: 3438346362373237
[  242.587211] x13: 3063666666666666 x12: 203a667562203239
[  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
[  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
[  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
[  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
[  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
[  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
[  242.587246] ---[ end trace 7831fd15034513ca ]---
[  242.587249] Call trace:
[  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
[  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 
ffffff8008393390
[  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 
ffffff8008573945
[  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 
ffffff80086f3730
[  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 
ffffff80086b7b5c
[  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 
0000000000000000
[  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 
000000000000003f
[  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 
0000000000000000
[  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 
203a6769726f5f65
[  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 
ffffff80086f373d
[  242.587293] b860: 0000000000000000 0000000000000000
[  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
[  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
[  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
[  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
[  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
[  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
[  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
[  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
[  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 
[brcmfmac]
[  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 
[brcmfmac]
[  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 
[brcmfmac]
[  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
[  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
[  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
[  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
[  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
[  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: 
ffffffc0727bc484 blocks: 0 size: 92 blksz: 512

i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc 
memory"

i can do udp based data transfers (iperf -s -u) without warning. doing 
the same with tcp (iperf -s) crashes the wlan interfaces.

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 04.04.2017 19:37, Heiner Kallweit wrote:
> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>> On 29.03.2017 16:29, Helmut Klein wrote:
>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>
>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>> This
>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>> configuration.
>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>
>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>
>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>
>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>
>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>
>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>> patches
>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>
>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>> Response
>>>>>>>>>>>> timeout
>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>> rate
>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>> available.
>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>> supported
>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>
>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>> rate
>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>> available.
>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>
>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>
>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>> the actual register value.
>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>> and
>>>>>>>>>>> send the log?
>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>> the issue.
>>>>>>>>>>>
>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>> mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>
>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>> %u\n", i,
>>>>>>>>>>> len);
>>>>>>>>>>> +
>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>
>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>> *dev_id)
>>>>>>>>>>>
>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>
>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>> +
>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> here is the output:
>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>> 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>> 721d0eb4
>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>> small read DMA returns
>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>
>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>> tackle this issue.
>>>>>>>>>
>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>> this one?
>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>
>>>>>>>>> Thanks, Heiner
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>
>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>> +
>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>
>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>> *dev_id)
>>>>>>>>>
>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>
>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>> +        dma_rmb();
>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>> +    }
>>>>>>>>> +
>>>>>>>>>      cmd->error = 0;
>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>
>>>>>>>>
>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>> but without a positiv result
>>>>>>>
>>>>>>> here are the patches
>>>>>>>
>>>>>>> for the fully operational version
>>>>>>>
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>> 15:22:31.000000000 +0100
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>> 13:02:05.254762191 +0100
>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>
>>>>>>>      /* data? */
>>>>>>>      if (cmd->data) {
>>>>>>> +
>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>> +
>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>> +
>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>> 0x%08x",
>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>> +
>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>  }
>>>>>>>
>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>      status = raw_status & irq_en;
>>>>>>>
>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>> +
>>>>>>>      if (!status) {
>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>> irq_en=0x%08x\n",
>>>>>>>               raw_status, irq_en);
>>>>>>>
>>>>>>> and this is for the version with the sdio problem
>>>>>>>
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>> 12:50:32.956474080 +0100
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>> 12:57:27.185837225 +0100
>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>      }
>>>>>>>
>>>>>>>      if (data) {
>>>>>>> +
>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>> +
>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>
>>>>>>>          if (data->blocks > 1) {
>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>      host->cmd = cmd;
>>>>>>>
>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>> +
>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>> 0x%08x",
>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>> +
>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>  }
>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>      status = raw_status & irq_en;
>>>>>>>
>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>> +
>>>>>>>      if (!status) {
>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>> irq_en=0x%08x\n",
>>>>>>>               raw_status, irq_en);
>>>>>>>
>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>> be a bug
>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>> very small
>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>> that level:
>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>> small
>>>>>> transfers.
>>>>>>
>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>> Let's try this as workaround.
>>>>>>
>>>>>> Could you please apply:
>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>> following:
>>>>>>
>>>>>>
>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>          return NULL;
>>>>>>  }
>>>>>>
>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>> +{
>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>> +}
>>>>>> +
>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>> mmc_data *data)
>>>>>>  {
>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>> DMA_FROM_DEVICE;
>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>> mmc_request *mrq,
>>>>>>                     int err)
>>>>>>  {
>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>
>>>>>>      if (data && data->sg_count)
>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>> +
>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>> +        int cnt;
>>>>>> +
>>>>>> +        dma_rmb();
>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>> +        if (cnt != data->blksz)
>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>> +    }
>>>>>>  }
>>>>>>
>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>> clk_rate)
>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>      }
>>>>>>
>>>>>>      if (data) {
>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>> +
>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>
>>>>>>          if (data->blocks > 1) {
>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>              }
>>>>>>          }
>>>>>>
>>>>>> +        /*
>>>>>> +         * workaround for most likely hw bug
>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>> +        */
>>>>>> +        if (small_read)
>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>> +
>>>>>>          data->bytes_xfered = 0;
>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>              desc[i].cmd_resp = 0;
>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>          }
>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> here is  the result:
>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>> addr=0x08000, nbytes=4
>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>> nsac 0
>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>> 00000000
>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>
>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>> nsac 0
>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>> 00000000
>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>> expected 0x16044330
>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>> rev=0
>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>> supported
>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>> failed!
>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>> failed
>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>
>>>>> the 1. cmd53 returned the correct data.
>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>> in the 1. cmd53)
>>>>>
>>>>> Helmut
>>>>>
>>>>
>>>> Hallo Helmut,
>>>>
>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>> regarding a not
>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>> for 64 bit DMA).
>>>>
>>>> I'd appreciate if you could test attached four patches on top of
>>>> latest next kernel.
>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>> but are not applied yet
>>>> Patch 3: Fix for suspected issue in SDIO core
>>>> Patch 4: Switch to descriptor chain mode
>>>>
>>>> By the way, if you go with latest next kernel:
>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>> version from March 10th.
>>>>
>>>> Thanks in advance,
>>>> Heiner
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> i've applied the 4 patches to the current linux-next.
>>>
>>> and
>>>
>>> i think, you did it!
>>>
>>> The adapter type is now detected und the firmware download succeeds.
>>>
>>> wlan0 gets an ip-address via dhcp.
>>>
>>> but: linux-next itself seems to have a problem with networking. even
>>> without having loaded
>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>> so i cannot do any further tests.
>>>
>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>> much better then with to old driver (none sg-list)
>>>
>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>> linux-next. But failed to compile it
>>>
>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>          mmc_get_dma_dir(data));
>>>          ^
>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>> ?dma_map_sg?
>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>
>>> Helmut
>>>
>>>
>>
>> Hallo Heiner,
>>
>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>> your first two patches are already included. so i had to appl only 3 and 4.
>>
>> tcp with the ethernet adpater is ok.
>>
>> but with the wlan i get warnings
>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>
>> it seems that not every sg buffer is 64 bit aligned.
>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>> i have the feeling, that only tcp packets trigger the warning
>>
>> Helmut
>>
>
> Hallo Helmut,
>
> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
> before the WARN_ON trace.
>
> Thanks, Heiner
>
> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
> index d40744bb..15cf9820 100644
> --- a/drivers/mmc/core/sdio_io.c
> +++ b/drivers/mmc/core/sdio_io.c
> @@ -14,6 +14,7 @@
>  #include <linux/mmc/card.h>
>  #include <linux/mmc/sdio.h>
>  #include <linux/mmc/sdio_func.h>
> +#include <linux/mm.h>
>
>  #include "sdio_ops.h"
>  #include "core.h"
> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>  	unsigned remainder = size;
>  	unsigned max_blocks;
>  	int ret;
> +	void *buf_orig = buf;
> +	unsigned size_orig = size;
>
>  	if (!func || (func->num > 7))
>  		return -EINVAL;
>
> +	if (is_vmalloc_addr(buf))
> +		pr_err("sdio: buffer is vmalloc memory\n");
> +
> +	if (((unsigned long)buf) & 7)
> +		pr_err("sdio: buffer %p is not aligned\n", buf);
> +
>  	/* Do the bulk of the transfer using block mode (if supported). */
>  	if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>  		/* Blocks per command is limited by host count, host transfer
> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>  				blocks = max_blocks;
>  			size = blocks * func->cur_blksize;
>
> +			if (((unsigned long)buf) & 7)
> +				pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
> +				       buf_orig, size_orig, buf, blocks, func->cur_blksize);
> +
>  			ret = mmc_io_rw_extended(func->card, write,
>  				func->num, addr, incr_addr, buf,
>  				blocks, func->cur_blksize);
> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>  	while (remainder > 0) {
>  		size = min(remainder, sdio_max_byte_size(func));
>
> +		if (((unsigned long)buf) & 7)
> +			pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
> +			       buf_orig, size_orig, buf, 0, size, func->cur_blksize);
> +
>  		/* Indicate byte mode by setting "blocks" = 0 */
>  		ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>  			 incr_addr, buf, 0, size);
>

Hallo Heiner,

this is the ouput
[   58.509474] sdio: buffer ffffffc073c4448c is not aligned
[   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: 
ffffffc073c4448c blocks: 0 size: 84 blksz: 512
[   58.519115] ------------[ cut here ]------------
[   58.519130] WARNING: CPU: 0 PID: 5 at 
drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
[   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder 
brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
[   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 
4.11.0-rc5-next-20170403+ #7
[   58.519154] Hardware name: Netxeon MiniMX (DT)
[   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker 
[brcmfmac]
[   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
[   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
[   58.519280] LR is at meson_mmc_request+0x4c/0x98
[   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] 
pstate: 20000145
[   58.519283] sp : ffffffc01027b910
[   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
[   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
[   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
[   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
[   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
[   58.519302] x19: 0000000000000000 x18: 0000000000000006
[   58.519306] x17: 0000000000000000 x16: 0000000000000000
[   58.519309] x15: ffffff80086f373d x14: 3463333730636666
[   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
[   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
[   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
[   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
[   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
[   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
[   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
[   58.519364] ---[ end trace 22523b85322e1fa4 ]---
[   58.519366] Call trace:
[   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
[   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 
ffffff8008393390
[   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 
ffffff8008573945
[   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 
ffffff80086f3730
[   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 
ffffff80086b7a60
[   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 
0000000000000000
[   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 
000000000000003f
[   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 
0000000000000000
[   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 
726f5f657a697320
[   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 
ffffff80086f373d
[   58.519401] b860: 0000000000000000 0000000000000000
[   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
[   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
[   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
[   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
[   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
[   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
[   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
[   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
[   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 
[brcmfmac]
[   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 
[brcmfmac]
[   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 
[brcmfmac]
[   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
[   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
[   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
[   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
[   59.517967] sdio: buffer ffffffc073c4448c is not aligned
[   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: 
ffffffc073c4448c blocks: 0 size: 84 blksz: 512


[  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
[  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: 
ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
[  242.586996] ------------[ cut here ]------------
[  242.587010] WARNING: CPU: 0 PID: 5 at 
drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
[  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder 
brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
[  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 
4.11.0-rc5-next-20170403+ #7
[  242.587036] Hardware name: Netxeon MiniMX (DT)
[  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker 
[brcmfmac]
[  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
[  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
[  242.587162] LR is at meson_mmc_request+0x4c/0x98
[  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] 
pstate: 20000145
[  242.587166] sp : ffffffc01027b910
[  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
[  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
[  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
[  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
[  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
[  242.587197] x19: 0000000000000000 x18: 0000000000000006
[  242.587200] x17: 0000000000000000 x16: 0000000000000000
[  242.587208] x15: ffffff80086f373d x14: 3438346362373237
[  242.587211] x13: 3063666666666666 x12: 203a667562203239
[  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
[  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
[  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
[  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
[  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
[  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
[  242.587246] ---[ end trace 7831fd15034513ca ]---
[  242.587249] Call trace:
[  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
[  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 
ffffff8008393390
[  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 
ffffff8008573945
[  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 
ffffff80086f3730
[  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 
ffffff80086b7b5c
[  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 
0000000000000000
[  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 
000000000000003f
[  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 
0000000000000000
[  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 
203a6769726f5f65
[  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 
ffffff80086f373d
[  242.587293] b860: 0000000000000000 0000000000000000
[  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
[  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
[  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
[  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
[  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
[  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
[  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
[  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
[  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 
[brcmfmac]
[  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 
[brcmfmac]
[  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 
[brcmfmac]
[  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
[  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
[  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
[  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
[  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
[  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: 
ffffffc0727bc484 blocks: 0 size: 92 blksz: 512

i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc 
memory"

i can do udp based data transfers (iperf -s -u) without warning. doing 
the same with tcp (iperf -s) crashes the wlan interfaces.

Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 04.04.2017 um 22:02 schrieb Helmut Klein:
> On 04.04.2017 19:37, Heiner Kallweit wrote:
>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>> This
>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>
>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>
>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>
>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>
>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>
>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>> patches
>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>
>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>> rate
>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>> available.
>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>> supported
>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>
>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>> rate
>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>> available.
>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>
>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>> and
>>>>>>>>>>>> send the log?
>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>> the issue.
>>>>>>>>>>>>
>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>> mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>
>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>> len);
>>>>>>>>>>>> +
>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>
>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>
>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>> +
>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> here is the output:
>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms
>>>>>>>>>>> nsac 0
>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>> 721d0eb4
>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>> small read DMA returns
>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>
>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>> tackle this issue.
>>>>>>>>>>
>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>> this one?
>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>
>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>> +
>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>
>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>> *dev_id)
>>>>>>>>>>
>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>
>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>> +    }
>>>>>>>>>> +
>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>> but without a positiv result
>>>>>>>>
>>>>>>>> here are the patches
>>>>>>>>
>>>>>>>> for the fully operational version
>>>>>>>>
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>
>>>>>>>>      /* data? */
>>>>>>>>      if (cmd->data) {
>>>>>>>> +
>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>> +
>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>> +
>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>> 0x%08x",
>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>> +
>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>  }
>>>>>>>>
>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>
>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>> +
>>>>>>>>      if (!status) {
>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>               raw_status, irq_en);
>>>>>>>>
>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>      }
>>>>>>>>
>>>>>>>>      if (data) {
>>>>>>>> +
>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>> +
>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>
>>>>>>>>          if (data->blocks > 1) {
>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>      host->cmd = cmd;
>>>>>>>>
>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>> +
>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>> 0x%08x",
>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>> +
>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>  }
>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>
>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>> +
>>>>>>>>      if (!status) {
>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>               raw_status, irq_en);
>>>>>>>>
>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>> be a bug
>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>> very small
>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>> that level:
>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>> small
>>>>>>> transfers.
>>>>>>>
>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>> Let's try this as workaround.
>>>>>>>
>>>>>>> Could you please apply:
>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>> following:
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>          return NULL;
>>>>>>>  }
>>>>>>>
>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>> +{
>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>> +}
>>>>>>> +
>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>> mmc_data *data)
>>>>>>>  {
>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>> DMA_FROM_DEVICE;
>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>> mmc_request *mrq,
>>>>>>>                     int err)
>>>>>>>  {
>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>
>>>>>>>      if (data && data->sg_count)
>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>> +
>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>> +        int cnt;
>>>>>>> +
>>>>>>> +        dma_rmb();
>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>> +        if (cnt != data->blksz)
>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>> +    }
>>>>>>>  }
>>>>>>>
>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>> clk_rate)
>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>      }
>>>>>>>
>>>>>>>      if (data) {
>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>> +
>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>
>>>>>>>          if (data->blocks > 1) {
>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>              }
>>>>>>>          }
>>>>>>>
>>>>>>> +        /*
>>>>>>> +         * workaround for most likely hw bug
>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>> +        */
>>>>>>> +        if (small_read)
>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>> +
>>>>>>>          data->bytes_xfered = 0;
>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>          }
>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> here is  the result:
>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>
>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>> expected 0x16044330
>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>> rev=0
>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>> supported
>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>> failed!
>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>> failed
>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>
>>>>>> the 1. cmd53 returned the correct data.
>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>> in the 1. cmd53)
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>> regarding a not
>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>> for 64 bit DMA).
>>>>>
>>>>> I'd appreciate if you could test attached four patches on top of
>>>>> latest next kernel.
>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>> but are not applied yet
>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>> Patch 4: Switch to descriptor chain mode
>>>>>
>>>>> By the way, if you go with latest next kernel:
>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>> version from March 10th.
>>>>>
>>>>> Thanks in advance,
>>>>> Heiner
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> i've applied the 4 patches to the current linux-next.
>>>>
>>>> and
>>>>
>>>> i think, you did it!
>>>>
>>>> The adapter type is now detected und the firmware download succeeds.
>>>>
>>>> wlan0 gets an ip-address via dhcp.
>>>>
>>>> but: linux-next itself seems to have a problem with networking. even
>>>> without having loaded
>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>> so i cannot do any further tests.
>>>>
>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>> much better then with to old driver (none sg-list)
>>>>
>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>> linux-next. But failed to compile it
>>>>
>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>          mmc_get_dma_dir(data));
>>>>          ^
>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>> ‘dma_map_sg’
>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>
>>>> Helmut
>>>>
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>
>>> tcp with the ethernet adpater is ok.
>>>
>>> but with the wlan i get warnings
>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>
>>> it seems that not every sg buffer is 64 bit aligned.
>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>> i have the feeling, that only tcp packets trigger the warning
>>>
>>> Helmut
>>>
>>
>> Hallo Helmut,
>>
>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>> before the WARN_ON trace.
>>
>> Thanks, Heiner
>>
>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>> index d40744bb..15cf9820 100644
>> --- a/drivers/mmc/core/sdio_io.c
>> +++ b/drivers/mmc/core/sdio_io.c
>> @@ -14,6 +14,7 @@
>>  #include <linux/mmc/card.h>
>>  #include <linux/mmc/sdio.h>
>>  #include <linux/mmc/sdio_func.h>
>> +#include <linux/mm.h>
>>
>>  #include "sdio_ops.h"
>>  #include "core.h"
>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>      unsigned remainder = size;
>>      unsigned max_blocks;
>>      int ret;
>> +    void *buf_orig = buf;
>> +    unsigned size_orig = size;
>>
>>      if (!func || (func->num > 7))
>>          return -EINVAL;
>>
>> +    if (is_vmalloc_addr(buf))
>> +        pr_err("sdio: buffer is vmalloc memory\n");
>> +
>> +    if (((unsigned long)buf) & 7)
>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>> +
>>      /* Do the bulk of the transfer using block mode (if supported). */
>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>          /* Blocks per command is limited by host count, host transfer
>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>                  blocks = max_blocks;
>>              size = blocks * func->cur_blksize;
>>
>> +            if (((unsigned long)buf) & 7)
>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>> +
>>              ret = mmc_io_rw_extended(func->card, write,
>>                  func->num, addr, incr_addr, buf,
>>                  blocks, func->cur_blksize);
>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>      while (remainder > 0) {
>>          size = min(remainder, sdio_max_byte_size(func));
>>
>> +        if (((unsigned long)buf) & 7)
>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>> +
>>          /* Indicate byte mode by setting "blocks" = 0 */
>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>               incr_addr, buf, 0, size);
>>
> 
> Hallo Heiner,
> 
> this is the ouput
> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
> [   58.519115] ------------[ cut here ]------------
> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
> [   58.519154] Hardware name: Netxeon MiniMX (DT)
> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
> [   58.519283] sp : ffffffc01027b910
> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
> [   58.519366] Call trace:
> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
> [   58.519401] b860: 0000000000000000 0000000000000000
> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
> 
> 
> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
> [  242.586996] ------------[ cut here ]------------
> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
> [  242.587036] Hardware name: Netxeon MiniMX (DT)
> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
> [  242.587166] sp : ffffffc01027b910
> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
> [  242.587246] ---[ end trace 7831fd15034513ca ]---
> [  242.587249] Call trace:
> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
> [  242.587293] b860: 0000000000000000 0000000000000000
> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
> 
> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
> 
> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
> 
> Helmut
> 
> 
Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
to be DMA-safe.
We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
and / or MMC controller drivers.

Heiner

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 04.04.2017 um 22:02 schrieb Helmut Klein:
> On 04.04.2017 19:37, Heiner Kallweit wrote:
>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>> This
>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>
>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>
>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>
>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>
>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>
>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>> patches
>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>
>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>> Response
>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>> rate
>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>> available.
>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>> supported
>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>
>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>> rate
>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>> available.
>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>
>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>> and
>>>>>>>>>>>> send the log?
>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>> the issue.
>>>>>>>>>>>>
>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>> mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>
>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>> len);
>>>>>>>>>>>> +
>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>
>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>
>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>> +
>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> here is the output:
>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>> 1000 ms
>>>>>>>>>>> nsac 0
>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>> 721d0eb4
>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>> small read DMA returns
>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>
>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>> tackle this issue.
>>>>>>>>>>
>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>> this one?
>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>
>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>
>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>> +
>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>
>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>> *dev_id)
>>>>>>>>>>
>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>
>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>> +    }
>>>>>>>>>> +
>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>> but without a positiv result
>>>>>>>>
>>>>>>>> here are the patches
>>>>>>>>
>>>>>>>> for the fully operational version
>>>>>>>>
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>
>>>>>>>>      /* data? */
>>>>>>>>      if (cmd->data) {
>>>>>>>> +
>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>> +
>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>> +
>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>> 0x%08x",
>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>> +
>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>  }
>>>>>>>>
>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>
>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>> +
>>>>>>>>      if (!status) {
>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>               raw_status, irq_en);
>>>>>>>>
>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>      }
>>>>>>>>
>>>>>>>>      if (data) {
>>>>>>>> +
>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>> +
>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>
>>>>>>>>          if (data->blocks > 1) {
>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>      host->cmd = cmd;
>>>>>>>>
>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>> +
>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>> 0x%08x",
>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>> +
>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>  }
>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>
>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>> +
>>>>>>>>      if (!status) {
>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>               raw_status, irq_en);
>>>>>>>>
>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>> be a bug
>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>> very small
>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>> that level:
>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>> small
>>>>>>> transfers.
>>>>>>>
>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>> Let's try this as workaround.
>>>>>>>
>>>>>>> Could you please apply:
>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>> following:
>>>>>>>
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>          return NULL;
>>>>>>>  }
>>>>>>>
>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>> +{
>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>> +}
>>>>>>> +
>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>> mmc_data *data)
>>>>>>>  {
>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>> DMA_FROM_DEVICE;
>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>> mmc_request *mrq,
>>>>>>>                     int err)
>>>>>>>  {
>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>
>>>>>>>      if (data && data->sg_count)
>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>> +
>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>> +        int cnt;
>>>>>>> +
>>>>>>> +        dma_rmb();
>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>> +        if (cnt != data->blksz)
>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>> +    }
>>>>>>>  }
>>>>>>>
>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>> clk_rate)
>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>      }
>>>>>>>
>>>>>>>      if (data) {
>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>> +
>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>
>>>>>>>          if (data->blocks > 1) {
>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>              }
>>>>>>>          }
>>>>>>>
>>>>>>> +        /*
>>>>>>> +         * workaround for most likely hw bug
>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>> +        */
>>>>>>> +        if (small_read)
>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>> +
>>>>>>>          data->bytes_xfered = 0;
>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>          }
>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> here is  the result:
>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>> addr=0x08000, nbytes=4
>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>
>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>> nsac 0
>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>> 00000000
>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>> expected 0x16044330
>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>> rev=0
>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>> supported
>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>> failed!
>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>> failed
>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>
>>>>>> the 1. cmd53 returned the correct data.
>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>> in the 1. cmd53)
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>> regarding a not
>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>> for 64 bit DMA).
>>>>>
>>>>> I'd appreciate if you could test attached four patches on top of
>>>>> latest next kernel.
>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>> but are not applied yet
>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>> Patch 4: Switch to descriptor chain mode
>>>>>
>>>>> By the way, if you go with latest next kernel:
>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>> version from March 10th.
>>>>>
>>>>> Thanks in advance,
>>>>> Heiner
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> i've applied the 4 patches to the current linux-next.
>>>>
>>>> and
>>>>
>>>> i think, you did it!
>>>>
>>>> The adapter type is now detected und the firmware download succeeds.
>>>>
>>>> wlan0 gets an ip-address via dhcp.
>>>>
>>>> but: linux-next itself seems to have a problem with networking. even
>>>> without having loaded
>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>> so i cannot do any further tests.
>>>>
>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>> much better then with to old driver (none sg-list)
>>>>
>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>> linux-next. But failed to compile it
>>>>
>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>          mmc_get_dma_dir(data));
>>>>          ^
>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>> ?dma_map_sg?
>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>
>>>> Helmut
>>>>
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>
>>> tcp with the ethernet adpater is ok.
>>>
>>> but with the wlan i get warnings
>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>
>>> it seems that not every sg buffer is 64 bit aligned.
>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>> i have the feeling, that only tcp packets trigger the warning
>>>
>>> Helmut
>>>
>>
>> Hallo Helmut,
>>
>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>> before the WARN_ON trace.
>>
>> Thanks, Heiner
>>
>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>> index d40744bb..15cf9820 100644
>> --- a/drivers/mmc/core/sdio_io.c
>> +++ b/drivers/mmc/core/sdio_io.c
>> @@ -14,6 +14,7 @@
>>  #include <linux/mmc/card.h>
>>  #include <linux/mmc/sdio.h>
>>  #include <linux/mmc/sdio_func.h>
>> +#include <linux/mm.h>
>>
>>  #include "sdio_ops.h"
>>  #include "core.h"
>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>      unsigned remainder = size;
>>      unsigned max_blocks;
>>      int ret;
>> +    void *buf_orig = buf;
>> +    unsigned size_orig = size;
>>
>>      if (!func || (func->num > 7))
>>          return -EINVAL;
>>
>> +    if (is_vmalloc_addr(buf))
>> +        pr_err("sdio: buffer is vmalloc memory\n");
>> +
>> +    if (((unsigned long)buf) & 7)
>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>> +
>>      /* Do the bulk of the transfer using block mode (if supported). */
>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>          /* Blocks per command is limited by host count, host transfer
>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>                  blocks = max_blocks;
>>              size = blocks * func->cur_blksize;
>>
>> +            if (((unsigned long)buf) & 7)
>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>> +
>>              ret = mmc_io_rw_extended(func->card, write,
>>                  func->num, addr, incr_addr, buf,
>>                  blocks, func->cur_blksize);
>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>      while (remainder > 0) {
>>          size = min(remainder, sdio_max_byte_size(func));
>>
>> +        if (((unsigned long)buf) & 7)
>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>> +
>>          /* Indicate byte mode by setting "blocks" = 0 */
>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>               incr_addr, buf, 0, size);
>>
> 
> Hallo Heiner,
> 
> this is the ouput
> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
> [   58.519115] ------------[ cut here ]------------
> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
> [   58.519154] Hardware name: Netxeon MiniMX (DT)
> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
> [   58.519283] sp : ffffffc01027b910
> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
> [   58.519366] Call trace:
> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
> [   58.519401] b860: 0000000000000000 0000000000000000
> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
> 
> 
> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
> [  242.586996] ------------[ cut here ]------------
> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
> [  242.587036] Hardware name: Netxeon MiniMX (DT)
> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
> [  242.587166] sp : ffffffc01027b910
> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
> [  242.587246] ---[ end trace 7831fd15034513ca ]---
> [  242.587249] Call trace:
> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
> [  242.587293] b860: 0000000000000000 0000000000000000
> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
> 
> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
> 
> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
> 
> Helmut
> 
> 
Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
to be DMA-safe.
We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
and / or MMC controller drivers.

Heiner

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 05.04.2017 08:02, Heiner Kallweit wrote:
> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>> and
>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>> len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> here is the output:
>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>> nsac 0
>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000
>>>>>>>>>>>> 00000000
>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>> small read DMA returns
>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>
>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>
>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>> this one?
>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>
>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>> +
>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>
>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>> *dev_id)
>>>>>>>>>>>
>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>
>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>> +    }
>>>>>>>>>>> +
>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>> but without a positiv result
>>>>>>>>>
>>>>>>>>> here are the patches
>>>>>>>>>
>>>>>>>>> for the fully operational version
>>>>>>>>>
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>
>>>>>>>>>      /* data? */
>>>>>>>>>      if (cmd->data) {
>>>>>>>>> +
>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>> +
>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>> +
>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>> 0x%08x",
>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>> +
>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>
>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>> +
>>>>>>>>>      if (!status) {
>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>
>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>>      if (data) {
>>>>>>>>> +
>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>> +
>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>
>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>
>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>> +
>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>> 0x%08x",
>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>> +
>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>  }
>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>
>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>> +
>>>>>>>>>      if (!status) {
>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>
>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>> be a bug
>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>> very small
>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>> that level:
>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>> small
>>>>>>>> transfers.
>>>>>>>>
>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>> Let's try this as workaround.
>>>>>>>>
>>>>>>>> Could you please apply:
>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>> following:
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>          return NULL;
>>>>>>>>  }
>>>>>>>>
>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>> +{
>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>> +}
>>>>>>>> +
>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>> mmc_data *data)
>>>>>>>>  {
>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq,
>>>>>>>>                     int err)
>>>>>>>>  {
>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>
>>>>>>>>      if (data && data->sg_count)
>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>> +
>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>> +        int cnt;
>>>>>>>> +
>>>>>>>> +        dma_rmb();
>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>> +    }
>>>>>>>>  }
>>>>>>>>
>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>> clk_rate)
>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>      }
>>>>>>>>
>>>>>>>>      if (data) {
>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>> +
>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>
>>>>>>>>          if (data->blocks > 1) {
>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>              }
>>>>>>>>          }
>>>>>>>>
>>>>>>>> +        /*
>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>> +        */
>>>>>>>> +        if (small_read)
>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>> +
>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>          }
>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> here is  the result:
>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>> nsac 0
>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>> 00000000
>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>
>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>> nsac 0
>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>> 00000000
>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>> expected 0x16044330
>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>> rev=0
>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>> supported
>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>> failed!
>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>> failed
>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>
>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>> in the 1. cmd53)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>> Hallo Helmut,
>>>>>>
>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>> regarding a not
>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>> for 64 bit DMA).
>>>>>>
>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>> latest next kernel.
>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>> but are not applied yet
>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>
>>>>>> By the way, if you go with latest next kernel:
>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>> version from March 10th.
>>>>>>
>>>>>> Thanks in advance,
>>>>>> Heiner
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> i've applied the 4 patches to the current linux-next.
>>>>>
>>>>> and
>>>>>
>>>>> i think, you did it!
>>>>>
>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>
>>>>> wlan0 gets an ip-address via dhcp.
>>>>>
>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>> without having loaded
>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>> so i cannot do any further tests.
>>>>>
>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>> much better then with to old driver (none sg-list)
>>>>>
>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>> linux-next. But failed to compile it
>>>>>
>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>          mmc_get_dma_dir(data));
>>>>>          ^
>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>> ‘dma_map_sg’
>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>
>>>> tcp with the ethernet adpater is ok.
>>>>
>>>> but with the wlan i get warnings
>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>
>>>> it seems that not every sg buffer is 64 bit aligned.
>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>> i have the feeling, that only tcp packets trigger the warning
>>>>
>>>> Helmut
>>>>
>>>
>>> Hallo Helmut,
>>>
>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>> before the WARN_ON trace.
>>>
>>> Thanks, Heiner
>>>
>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>> index d40744bb..15cf9820 100644
>>> --- a/drivers/mmc/core/sdio_io.c
>>> +++ b/drivers/mmc/core/sdio_io.c
>>> @@ -14,6 +14,7 @@
>>>  #include <linux/mmc/card.h>
>>>  #include <linux/mmc/sdio.h>
>>>  #include <linux/mmc/sdio_func.h>
>>> +#include <linux/mm.h>
>>>
>>>  #include "sdio_ops.h"
>>>  #include "core.h"
>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>      unsigned remainder = size;
>>>      unsigned max_blocks;
>>>      int ret;
>>> +    void *buf_orig = buf;
>>> +    unsigned size_orig = size;
>>>
>>>      if (!func || (func->num > 7))
>>>          return -EINVAL;
>>>
>>> +    if (is_vmalloc_addr(buf))
>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>> +
>>> +    if (((unsigned long)buf) & 7)
>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>> +
>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>          /* Blocks per command is limited by host count, host transfer
>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>                  blocks = max_blocks;
>>>              size = blocks * func->cur_blksize;
>>>
>>> +            if (((unsigned long)buf) & 7)
>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>> +
>>>              ret = mmc_io_rw_extended(func->card, write,
>>>                  func->num, addr, incr_addr, buf,
>>>                  blocks, func->cur_blksize);
>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>      while (remainder > 0) {
>>>          size = min(remainder, sdio_max_byte_size(func));
>>>
>>> +        if (((unsigned long)buf) & 7)
>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>> +
>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>               incr_addr, buf, 0, size);
>>>
>>
>> Hallo Heiner,
>>
>> this is the ouput
>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>> [   58.519115] ------------[ cut here ]------------
>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>> [   58.519283] sp : ffffffc01027b910
>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>> [   58.519366] Call trace:
>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>> [   58.519401] b860: 0000000000000000 0000000000000000
>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>
>>
>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>> [  242.586996] ------------[ cut here ]------------
>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>> [  242.587166] sp : ffffffc01027b910
>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>> [  242.587249] Call trace:
>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>> [  242.587293] b860: 0000000000000000 0000000000000000
>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>
>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>
>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>
>> Helmut
>>
>>
> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
> to be DMA-safe.
> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
> and / or MMC controller drivers.
>
> Heiner
>
>
Hallo Heiner,

i found a solution:

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c 
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index a999f95062c7..b966217f3a6c 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
  /* Limit on rounding up frames */
  static const uint max_roundup = 512;

-#define ALIGNMENT  4
+#define ALIGNMENT  8

  enum brcmf_sdio_frmtype {
         BRCMF_SDIO_FT_NORMAL,
-- 
2.11.0


with that my wlan is absolutely stable. i tested it with a bidirectional 
performance test for 1000 seconds.
No problems at all. No entries in syslog.

performance
- sending: 16.5 MBit/s  (iperf -c)
- receiving: 12.4 MBit/s  (iperf -s)

the sending performance with the amlogic kernel is higher (19.5 Mbit/s). 
the receiving performance is the same.

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 05.04.2017 08:02, Heiner Kallweit wrote:
> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>> and
>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>> len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> here is the output:
>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>> nsac 0
>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>> 00000000
>>>>>>>>>>>> 00000000
>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>> small read DMA returns
>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>
>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>
>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>> this one?
>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>
>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>
>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>> +
>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>
>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>> *dev_id)
>>>>>>>>>>>
>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>
>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>> +    }
>>>>>>>>>>> +
>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>> but without a positiv result
>>>>>>>>>
>>>>>>>>> here are the patches
>>>>>>>>>
>>>>>>>>> for the fully operational version
>>>>>>>>>
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>
>>>>>>>>>      /* data? */
>>>>>>>>>      if (cmd->data) {
>>>>>>>>> +
>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>> +
>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>> +
>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>> 0x%08x",
>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>> +
>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>
>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>> +
>>>>>>>>>      if (!status) {
>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>
>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>>      if (data) {
>>>>>>>>> +
>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>> +
>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>
>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>
>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>> +
>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>> 0x%08x",
>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>> +
>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>  }
>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>
>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>> +
>>>>>>>>>      if (!status) {
>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>
>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>> be a bug
>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>> very small
>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>> that level:
>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>> small
>>>>>>>> transfers.
>>>>>>>>
>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>> Let's try this as workaround.
>>>>>>>>
>>>>>>>> Could you please apply:
>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>> following:
>>>>>>>>
>>>>>>>>
>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>          return NULL;
>>>>>>>>  }
>>>>>>>>
>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>> +{
>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>> +}
>>>>>>>> +
>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>> mmc_data *data)
>>>>>>>>  {
>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>> mmc_request *mrq,
>>>>>>>>                     int err)
>>>>>>>>  {
>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>
>>>>>>>>      if (data && data->sg_count)
>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>> +
>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>> +        int cnt;
>>>>>>>> +
>>>>>>>> +        dma_rmb();
>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>> +    }
>>>>>>>>  }
>>>>>>>>
>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>> clk_rate)
>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>      }
>>>>>>>>
>>>>>>>>      if (data) {
>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>> +
>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>
>>>>>>>>          if (data->blocks > 1) {
>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>              }
>>>>>>>>          }
>>>>>>>>
>>>>>>>> +        /*
>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>> +        */
>>>>>>>> +        if (small_read)
>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>> +
>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>          }
>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> here is  the result:
>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>> addr=0x08000, nbytes=4
>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>> nsac 0
>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>> 00000000
>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>
>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>> nsac 0
>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>> 00000000
>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>> expected 0x16044330
>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>> rev=0
>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>> supported
>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>> failed!
>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>> failed
>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>
>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>> in the 1. cmd53)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>> Hallo Helmut,
>>>>>>
>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>> regarding a not
>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>> for 64 bit DMA).
>>>>>>
>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>> latest next kernel.
>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>> but are not applied yet
>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>
>>>>>> By the way, if you go with latest next kernel:
>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>> version from March 10th.
>>>>>>
>>>>>> Thanks in advance,
>>>>>> Heiner
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> i've applied the 4 patches to the current linux-next.
>>>>>
>>>>> and
>>>>>
>>>>> i think, you did it!
>>>>>
>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>
>>>>> wlan0 gets an ip-address via dhcp.
>>>>>
>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>> without having loaded
>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>> so i cannot do any further tests.
>>>>>
>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>> much better then with to old driver (none sg-list)
>>>>>
>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>> linux-next. But failed to compile it
>>>>>
>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>          mmc_get_dma_dir(data));
>>>>>          ^
>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>> ?dma_map_sg?
>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>
>>>> tcp with the ethernet adpater is ok.
>>>>
>>>> but with the wlan i get warnings
>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>
>>>> it seems that not every sg buffer is 64 bit aligned.
>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>> i have the feeling, that only tcp packets trigger the warning
>>>>
>>>> Helmut
>>>>
>>>
>>> Hallo Helmut,
>>>
>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>> before the WARN_ON trace.
>>>
>>> Thanks, Heiner
>>>
>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>> index d40744bb..15cf9820 100644
>>> --- a/drivers/mmc/core/sdio_io.c
>>> +++ b/drivers/mmc/core/sdio_io.c
>>> @@ -14,6 +14,7 @@
>>>  #include <linux/mmc/card.h>
>>>  #include <linux/mmc/sdio.h>
>>>  #include <linux/mmc/sdio_func.h>
>>> +#include <linux/mm.h>
>>>
>>>  #include "sdio_ops.h"
>>>  #include "core.h"
>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>      unsigned remainder = size;
>>>      unsigned max_blocks;
>>>      int ret;
>>> +    void *buf_orig = buf;
>>> +    unsigned size_orig = size;
>>>
>>>      if (!func || (func->num > 7))
>>>          return -EINVAL;
>>>
>>> +    if (is_vmalloc_addr(buf))
>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>> +
>>> +    if (((unsigned long)buf) & 7)
>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>> +
>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>          /* Blocks per command is limited by host count, host transfer
>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>                  blocks = max_blocks;
>>>              size = blocks * func->cur_blksize;
>>>
>>> +            if (((unsigned long)buf) & 7)
>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>> +
>>>              ret = mmc_io_rw_extended(func->card, write,
>>>                  func->num, addr, incr_addr, buf,
>>>                  blocks, func->cur_blksize);
>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>      while (remainder > 0) {
>>>          size = min(remainder, sdio_max_byte_size(func));
>>>
>>> +        if (((unsigned long)buf) & 7)
>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>> +
>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>               incr_addr, buf, 0, size);
>>>
>>
>> Hallo Heiner,
>>
>> this is the ouput
>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>> [   58.519115] ------------[ cut here ]------------
>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>> [   58.519283] sp : ffffffc01027b910
>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>> [   58.519366] Call trace:
>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>> [   58.519401] b860: 0000000000000000 0000000000000000
>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>
>>
>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>> [  242.586996] ------------[ cut here ]------------
>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>> [  242.587166] sp : ffffffc01027b910
>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>> [  242.587249] Call trace:
>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>> [  242.587293] b860: 0000000000000000 0000000000000000
>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>
>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>
>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>
>> Helmut
>>
>>
> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
> to be DMA-safe.
> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
> and / or MMC controller drivers.
>
> Heiner
>
>
Hallo Heiner,

i found a solution:

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c 
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index a999f95062c7..b966217f3a6c 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
  /* Limit on rounding up frames */
  static const uint max_roundup = 512;

-#define ALIGNMENT  4
+#define ALIGNMENT  8

  enum brcmf_sdio_frmtype {
         BRCMF_SDIO_FT_NORMAL,
-- 
2.11.0


with that my wlan is absolutely stable. i tested it with a bidirectional 
performance test for 1000 seconds.
No problems at all. No entries in syslog.

performance
- sending: 16.5 MBit/s  (iperf -c)
- receiving: 12.4 MBit/s  (iperf -s)

the sending performance with the amlogic kernel is higher (19.5 Mbit/s). 
the receiving performance is the same.

Helmut

Re: meson-gx-mmc: 2nd patch set

[Neil Armstrong]

On 04/05/2017 02:38 PM, Helmut Klein wrote:
> On 05.04.2017 08:02, Heiner Kallweit wrote:
>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>> and
>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>
>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>> this one?
>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>
>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>> +
>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>
>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>
>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>> +    }
>>>>>>>>>>>> +
>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>> but without a positiv result
>>>>>>>>>>
>>>>>>>>>> here are the patches
>>>>>>>>>>
>>>>>>>>>> for the fully operational version
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>
>>>>>>>>>>      /* data? */
>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>  }
>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>> be a bug
>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>> very small
>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>> that level:
>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>> small
>>>>>>>>> transfers.
>>>>>>>>>
>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>> Let's try this as workaround.
>>>>>>>>>
>>>>>>>>> Could you please apply:
>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>> following:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>          return NULL;
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>> +{
>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>> mmc_data *data)
>>>>>>>>>  {
>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq,
>>>>>>>>>                     int err)
>>>>>>>>>  {
>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>
>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>> +
>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>> +        int cnt;
>>>>>>>>> +
>>>>>>>>> +        dma_rmb();
>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>> +    }
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>> clk_rate)
>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>>      if (data) {
>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>> +
>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>
>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>              }
>>>>>>>>>          }
>>>>>>>>>
>>>>>>>>> +        /*
>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>> +        */
>>>>>>>>> +        if (small_read)
>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>> +
>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>          }
>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> here is  the result:
>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>
>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>> expected 0x16044330
>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>> rev=0
>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>> failed!
>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>> failed
>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>
>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>> in the 1. cmd53)
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Helmut,
>>>>>>>
>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>> regarding a not
>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>> for 64 bit DMA).
>>>>>>>
>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>> latest next kernel.
>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>> but are not applied yet
>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>
>>>>>>> By the way, if you go with latest next kernel:
>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>> version from March 10th.
>>>>>>>
>>>>>>> Thanks in advance,
>>>>>>> Heiner
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>
>>>>>> and
>>>>>>
>>>>>> i think, you did it!
>>>>>>
>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>
>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>
>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>> without having loaded
>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>> so i cannot do any further tests.
>>>>>>
>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>> much better then with to old driver (none sg-list)
>>>>>>
>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>> linux-next. But failed to compile it
>>>>>>
>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>          mmc_get_dma_dir(data));
>>>>>>          ^
>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>> ‘dma_map_sg’
>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>
>>>>> tcp with the ethernet adpater is ok.
>>>>>
>>>>> but with the wlan i get warnings
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>
>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>
>>>>> Helmut
>>>>>
>>>>
>>>> Hallo Helmut,
>>>>
>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>> before the WARN_ON trace.
>>>>
>>>> Thanks, Heiner
>>>>
>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>> index d40744bb..15cf9820 100644
>>>> --- a/drivers/mmc/core/sdio_io.c
>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>> @@ -14,6 +14,7 @@
>>>>  #include <linux/mmc/card.h>
>>>>  #include <linux/mmc/sdio.h>
>>>>  #include <linux/mmc/sdio_func.h>
>>>> +#include <linux/mm.h>
>>>>
>>>>  #include "sdio_ops.h"
>>>>  #include "core.h"
>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      unsigned remainder = size;
>>>>      unsigned max_blocks;
>>>>      int ret;
>>>> +    void *buf_orig = buf;
>>>> +    unsigned size_orig = size;
>>>>
>>>>      if (!func || (func->num > 7))
>>>>          return -EINVAL;
>>>>
>>>> +    if (is_vmalloc_addr(buf))
>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>> +
>>>> +    if (((unsigned long)buf) & 7)
>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>> +
>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>          /* Blocks per command is limited by host count, host transfer
>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>                  blocks = max_blocks;
>>>>              size = blocks * func->cur_blksize;
>>>>
>>>> +            if (((unsigned long)buf) & 7)
>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>> +
>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>                  func->num, addr, incr_addr, buf,
>>>>                  blocks, func->cur_blksize);
>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      while (remainder > 0) {
>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>
>>>> +        if (((unsigned long)buf) & 7)
>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>> +
>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>               incr_addr, buf, 0, size);
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> this is the ouput
>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>> [   58.519115] ------------[ cut here ]------------
>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [   58.519283] sp : ffffffc01027b910
>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>> [   58.519366] Call trace:
>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>
>>>
>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>> [  242.586996] ------------[ cut here ]------------
>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [  242.587166] sp : ffffffc01027b910
>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>> [  242.587249] Call trace:
>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>
>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>
>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>
>>> Helmut
>>>
>>>
>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>> to be DMA-safe.
>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>> and / or MMC controller drivers.
>>
>> Heiner
>>
>>
> Hallo Heiner,
> 
> i found a solution:
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> index a999f95062c7..b966217f3a6c 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>  /* Limit on rounding up frames */
>  static const uint max_roundup = 512;
> 
> -#define ALIGNMENT  4
> +#define ALIGNMENT  8
> 
>  enum brcmf_sdio_frmtype {
>         BRCMF_SDIO_FT_NORMAL,

Hi Heiner,

Isn't a way to use the old behaviour with a badly aligned buffer ?

Neil

meson-gx-mmc: 2nd patch set

[Neil Armstrong]

On 04/05/2017 02:38 PM, Helmut Klein wrote:
> On 05.04.2017 08:02, Heiner Kallweit wrote:
>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>> and
>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>
>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>> this one?
>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>
>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>> +
>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>
>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>
>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>> +    }
>>>>>>>>>>>> +
>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>> but without a positiv result
>>>>>>>>>>
>>>>>>>>>> here are the patches
>>>>>>>>>>
>>>>>>>>>> for the fully operational version
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>
>>>>>>>>>>      /* data? */
>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>  }
>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>> be a bug
>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>> very small
>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>> that level:
>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>> small
>>>>>>>>> transfers.
>>>>>>>>>
>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>> Let's try this as workaround.
>>>>>>>>>
>>>>>>>>> Could you please apply:
>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>> following:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>          return NULL;
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>> +{
>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>> mmc_data *data)
>>>>>>>>>  {
>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq,
>>>>>>>>>                     int err)
>>>>>>>>>  {
>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>
>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>> +
>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>> +        int cnt;
>>>>>>>>> +
>>>>>>>>> +        dma_rmb();
>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>> +    }
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>> clk_rate)
>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>>      if (data) {
>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>> +
>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>
>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>              }
>>>>>>>>>          }
>>>>>>>>>
>>>>>>>>> +        /*
>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>> +        */
>>>>>>>>> +        if (small_read)
>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>> +
>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>          }
>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> here is  the result:
>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>
>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>> expected 0x16044330
>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>> rev=0
>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>> failed!
>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>> failed
>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>
>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>> in the 1. cmd53)
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Helmut,
>>>>>>>
>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>> regarding a not
>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>> for 64 bit DMA).
>>>>>>>
>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>> latest next kernel.
>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>> but are not applied yet
>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>
>>>>>>> By the way, if you go with latest next kernel:
>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>> version from March 10th.
>>>>>>>
>>>>>>> Thanks in advance,
>>>>>>> Heiner
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>
>>>>>> and
>>>>>>
>>>>>> i think, you did it!
>>>>>>
>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>
>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>
>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>> without having loaded
>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>> so i cannot do any further tests.
>>>>>>
>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>> much better then with to old driver (none sg-list)
>>>>>>
>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>> linux-next. But failed to compile it
>>>>>>
>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>>          mmc_get_dma_dir(data));
>>>>>>          ^
>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>> ?dma_map_sg?
>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>
>>>>> tcp with the ethernet adpater is ok.
>>>>>
>>>>> but with the wlan i get warnings
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>
>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>
>>>>> Helmut
>>>>>
>>>>
>>>> Hallo Helmut,
>>>>
>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>> before the WARN_ON trace.
>>>>
>>>> Thanks, Heiner
>>>>
>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>> index d40744bb..15cf9820 100644
>>>> --- a/drivers/mmc/core/sdio_io.c
>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>> @@ -14,6 +14,7 @@
>>>>  #include <linux/mmc/card.h>
>>>>  #include <linux/mmc/sdio.h>
>>>>  #include <linux/mmc/sdio_func.h>
>>>> +#include <linux/mm.h>
>>>>
>>>>  #include "sdio_ops.h"
>>>>  #include "core.h"
>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      unsigned remainder = size;
>>>>      unsigned max_blocks;
>>>>      int ret;
>>>> +    void *buf_orig = buf;
>>>> +    unsigned size_orig = size;
>>>>
>>>>      if (!func || (func->num > 7))
>>>>          return -EINVAL;
>>>>
>>>> +    if (is_vmalloc_addr(buf))
>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>> +
>>>> +    if (((unsigned long)buf) & 7)
>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>> +
>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>          /* Blocks per command is limited by host count, host transfer
>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>                  blocks = max_blocks;
>>>>              size = blocks * func->cur_blksize;
>>>>
>>>> +            if (((unsigned long)buf) & 7)
>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>> +
>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>                  func->num, addr, incr_addr, buf,
>>>>                  blocks, func->cur_blksize);
>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      while (remainder > 0) {
>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>
>>>> +        if (((unsigned long)buf) & 7)
>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>> +
>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>               incr_addr, buf, 0, size);
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> this is the ouput
>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>> [   58.519115] ------------[ cut here ]------------
>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [   58.519283] sp : ffffffc01027b910
>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>> [   58.519366] Call trace:
>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>
>>>
>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>> [  242.586996] ------------[ cut here ]------------
>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [  242.587166] sp : ffffffc01027b910
>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>> [  242.587249] Call trace:
>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>
>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>
>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>
>>> Helmut
>>>
>>>
>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>> to be DMA-safe.
>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>> and / or MMC controller drivers.
>>
>> Heiner
>>
>>
> Hallo Heiner,
> 
> i found a solution:
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> index a999f95062c7..b966217f3a6c 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>  /* Limit on rounding up frames */
>  static const uint max_roundup = 512;
> 
> -#define ALIGNMENT  4
> +#define ALIGNMENT  8
> 
>  enum brcmf_sdio_frmtype {
>         BRCMF_SDIO_FT_NORMAL,

Hi Heiner,

Isn't a way to use the old behaviour with a badly aligned buffer ?

Neil

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 05.04.2017 15:37, Neil Armstrong wrote:
> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>
>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>> this one?
>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +    }
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>
>>>>>>>>>>> here are the patches
>>>>>>>>>>>
>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>
>>>>>>>>>>>      /* data? */
>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>> be a bug
>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>> very small
>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>> that level:
>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>> small
>>>>>>>>>> transfers.
>>>>>>>>>>
>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>
>>>>>>>>>> Could you please apply:
>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>> following:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>>  {
>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>                     int err)
>>>>>>>>>>  {
>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>
>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>> +
>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>> +        int cnt;
>>>>>>>>>> +
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>> +    }
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>> clk_rate)
>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>              }
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> +        /*
>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>> +        */
>>>>>>>>>> +        if (small_read)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>> +
>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>          }
>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> here is  the result:
>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>
>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>> expected 0x16044330
>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>> rev=0
>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>> failed!
>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>> failed
>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>
>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>> in the 1. cmd53)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Helmut,
>>>>>>>>
>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>> regarding a not
>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>> for 64 bit DMA).
>>>>>>>>
>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>> latest next kernel.
>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>> but are not applied yet
>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>
>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>> version from March 10th.
>>>>>>>>
>>>>>>>> Thanks in advance,
>>>>>>>> Heiner
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>
>>>>>>> and
>>>>>>>
>>>>>>> i think, you did it!
>>>>>>>
>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>
>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>
>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>> without having loaded
>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>> so i cannot do any further tests.
>>>>>>>
>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>
>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>> linux-next. But failed to compile it
>>>>>>>
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>          ^
>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>> ‘dma_map_sg’
>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>
>>>>>> tcp with the ethernet adpater is ok.
>>>>>>
>>>>>> but with the wlan i get warnings
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>
>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>> before the WARN_ON trace.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>> index d40744bb..15cf9820 100644
>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>> @@ -14,6 +14,7 @@
>>>>>  #include <linux/mmc/card.h>
>>>>>  #include <linux/mmc/sdio.h>
>>>>>  #include <linux/mmc/sdio_func.h>
>>>>> +#include <linux/mm.h>
>>>>>
>>>>>  #include "sdio_ops.h"
>>>>>  #include "core.h"
>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      unsigned remainder = size;
>>>>>      unsigned max_blocks;
>>>>>      int ret;
>>>>> +    void *buf_orig = buf;
>>>>> +    unsigned size_orig = size;
>>>>>
>>>>>      if (!func || (func->num > 7))
>>>>>          return -EINVAL;
>>>>>
>>>>> +    if (is_vmalloc_addr(buf))
>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>> +
>>>>> +    if (((unsigned long)buf) & 7)
>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>> +
>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>                  blocks = max_blocks;
>>>>>              size = blocks * func->cur_blksize;
>>>>>
>>>>> +            if (((unsigned long)buf) & 7)
>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>> +
>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>                  func->num, addr, incr_addr, buf,
>>>>>                  blocks, func->cur_blksize);
>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      while (remainder > 0) {
>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>
>>>>> +        if (((unsigned long)buf) & 7)
>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>> +
>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>               incr_addr, buf, 0, size);
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this is the ouput
>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>> [   58.519115] ------------[ cut here ]------------
>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [   58.519283] sp : ffffffc01027b910
>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>> [   58.519366] Call trace:
>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>
>>>>
>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>> [  242.586996] ------------[ cut here ]------------
>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [  242.587166] sp : ffffffc01027b910
>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>> [  242.587249] Call trace:
>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>
>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>
>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>> to be DMA-safe.
>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>> and / or MMC controller drivers.
>>>
>>> Heiner
>>>
>>>
>> Hallo Heiner,
>>
>> i found a solution:
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> index a999f95062c7..b966217f3a6c 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>  /* Limit on rounding up frames */
>>  static const uint max_roundup = 512;
>>
>> -#define ALIGNMENT  4
>> +#define ALIGNMENT  8
>>
>>  enum brcmf_sdio_frmtype {
>>         BRCMF_SDIO_FT_NORMAL,
>
> Hi Heiner,
>
> Isn't a way to use the old behaviour with a badly aligned buffer ?
>
> Neil
>
>

"a solution" was a bad expression.

with my mail i wanted to show, that
- Heiners drivers is, when receiving correctly aligned buffers, 
perfectly operational
- the performance isn't better than that of the amlogic driver, which 
uses, as much as i can see, a bounce buffer for sdio

and what was surprising for me:
- the code for the buffer aligment inside of brcmfmac uses a locally 
defined value. isn't there a global definition for this??
- handling for buffer alignment seems IMHO inconsistent in the kernel

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 05.04.2017 15:37, Neil Armstrong wrote:
> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>
>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>> this one?
>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +    }
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>
>>>>>>>>>>> here are the patches
>>>>>>>>>>>
>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>
>>>>>>>>>>>      /* data? */
>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>> be a bug
>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>> very small
>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>> that level:
>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>> small
>>>>>>>>>> transfers.
>>>>>>>>>>
>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>
>>>>>>>>>> Could you please apply:
>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>> following:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>>  {
>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>                     int err)
>>>>>>>>>>  {
>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>
>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>> +
>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>> +        int cnt;
>>>>>>>>>> +
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>> +    }
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>> clk_rate)
>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>              }
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> +        /*
>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>> +        */
>>>>>>>>>> +        if (small_read)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>> +
>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>          }
>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> here is  the result:
>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>
>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>> expected 0x16044330
>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>> rev=0
>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>> failed!
>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>> failed
>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>
>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>> in the 1. cmd53)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Helmut,
>>>>>>>>
>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>> regarding a not
>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>> for 64 bit DMA).
>>>>>>>>
>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>> latest next kernel.
>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>> but are not applied yet
>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>
>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>> version from March 10th.
>>>>>>>>
>>>>>>>> Thanks in advance,
>>>>>>>> Heiner
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>
>>>>>>> and
>>>>>>>
>>>>>>> i think, you did it!
>>>>>>>
>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>
>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>
>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>> without having loaded
>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>> so i cannot do any further tests.
>>>>>>>
>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>
>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>> linux-next. But failed to compile it
>>>>>>>
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>          ^
>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>> ?dma_map_sg?
>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>
>>>>>> tcp with the ethernet adpater is ok.
>>>>>>
>>>>>> but with the wlan i get warnings
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>
>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>> before the WARN_ON trace.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>> index d40744bb..15cf9820 100644
>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>> @@ -14,6 +14,7 @@
>>>>>  #include <linux/mmc/card.h>
>>>>>  #include <linux/mmc/sdio.h>
>>>>>  #include <linux/mmc/sdio_func.h>
>>>>> +#include <linux/mm.h>
>>>>>
>>>>>  #include "sdio_ops.h"
>>>>>  #include "core.h"
>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      unsigned remainder = size;
>>>>>      unsigned max_blocks;
>>>>>      int ret;
>>>>> +    void *buf_orig = buf;
>>>>> +    unsigned size_orig = size;
>>>>>
>>>>>      if (!func || (func->num > 7))
>>>>>          return -EINVAL;
>>>>>
>>>>> +    if (is_vmalloc_addr(buf))
>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>> +
>>>>> +    if (((unsigned long)buf) & 7)
>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>> +
>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>                  blocks = max_blocks;
>>>>>              size = blocks * func->cur_blksize;
>>>>>
>>>>> +            if (((unsigned long)buf) & 7)
>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>> +
>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>                  func->num, addr, incr_addr, buf,
>>>>>                  blocks, func->cur_blksize);
>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      while (remainder > 0) {
>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>
>>>>> +        if (((unsigned long)buf) & 7)
>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>> +
>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>               incr_addr, buf, 0, size);
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this is the ouput
>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>> [   58.519115] ------------[ cut here ]------------
>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [   58.519283] sp : ffffffc01027b910
>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>> [   58.519366] Call trace:
>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>
>>>>
>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>> [  242.586996] ------------[ cut here ]------------
>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [  242.587166] sp : ffffffc01027b910
>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>> [  242.587249] Call trace:
>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>
>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>
>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>> to be DMA-safe.
>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>> and / or MMC controller drivers.
>>>
>>> Heiner
>>>
>>>
>> Hallo Heiner,
>>
>> i found a solution:
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> index a999f95062c7..b966217f3a6c 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>  /* Limit on rounding up frames */
>>  static const uint max_roundup = 512;
>>
>> -#define ALIGNMENT  4
>> +#define ALIGNMENT  8
>>
>>  enum brcmf_sdio_frmtype {
>>         BRCMF_SDIO_FT_NORMAL,
>
> Hi Heiner,
>
> Isn't a way to use the old behaviour with a badly aligned buffer ?
>
> Neil
>
>

"a solution" was a bad expression.

with my mail i wanted to show, that
- Heiners drivers is, when receiving correctly aligned buffers, 
perfectly operational
- the performance isn't better than that of the amlogic driver, which 
uses, as much as i can see, a bounce buffer for sdio

and what was surprising for me:
- the code for the buffer aligment inside of brcmfmac uses a locally 
defined value. isn't there a global definition for this??
- handling for buffer alignment seems IMHO inconsistent in the kernel

Helmut

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 05.04.2017 um 15:37 schrieb Neil Armstrong:
> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>
>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>> this one?
>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +    }
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>
>>>>>>>>>>> here are the patches
>>>>>>>>>>>
>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>
>>>>>>>>>>>      /* data? */
>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>> be a bug
>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>> very small
>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>> that level:
>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>> small
>>>>>>>>>> transfers.
>>>>>>>>>>
>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>
>>>>>>>>>> Could you please apply:
>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>> following:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>>  {
>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>                     int err)
>>>>>>>>>>  {
>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>
>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>> +
>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>> +        int cnt;
>>>>>>>>>> +
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>> +    }
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>> clk_rate)
>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>              }
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> +        /*
>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>> +        */
>>>>>>>>>> +        if (small_read)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>> +
>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>          }
>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> here is  the result:
>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>
>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>> expected 0x16044330
>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>> rev=0
>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>> failed!
>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>> failed
>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>
>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>> in the 1. cmd53)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Helmut,
>>>>>>>>
>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>> regarding a not
>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>> for 64 bit DMA).
>>>>>>>>
>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>> latest next kernel.
>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>> but are not applied yet
>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>
>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>> version from March 10th.
>>>>>>>>
>>>>>>>> Thanks in advance,
>>>>>>>> Heiner
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>
>>>>>>> and
>>>>>>>
>>>>>>> i think, you did it!
>>>>>>>
>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>
>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>
>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>> without having loaded
>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>> so i cannot do any further tests.
>>>>>>>
>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>
>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>> linux-next. But failed to compile it
>>>>>>>
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>          ^
>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>> ‘dma_map_sg’
>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>
>>>>>> tcp with the ethernet adpater is ok.
>>>>>>
>>>>>> but with the wlan i get warnings
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>
>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>> before the WARN_ON trace.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>> index d40744bb..15cf9820 100644
>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>> @@ -14,6 +14,7 @@
>>>>>  #include <linux/mmc/card.h>
>>>>>  #include <linux/mmc/sdio.h>
>>>>>  #include <linux/mmc/sdio_func.h>
>>>>> +#include <linux/mm.h>
>>>>>
>>>>>  #include "sdio_ops.h"
>>>>>  #include "core.h"
>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      unsigned remainder = size;
>>>>>      unsigned max_blocks;
>>>>>      int ret;
>>>>> +    void *buf_orig = buf;
>>>>> +    unsigned size_orig = size;
>>>>>
>>>>>      if (!func || (func->num > 7))
>>>>>          return -EINVAL;
>>>>>
>>>>> +    if (is_vmalloc_addr(buf))
>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>> +
>>>>> +    if (((unsigned long)buf) & 7)
>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>> +
>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>                  blocks = max_blocks;
>>>>>              size = blocks * func->cur_blksize;
>>>>>
>>>>> +            if (((unsigned long)buf) & 7)
>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>> +
>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>                  func->num, addr, incr_addr, buf,
>>>>>                  blocks, func->cur_blksize);
>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      while (remainder > 0) {
>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>
>>>>> +        if (((unsigned long)buf) & 7)
>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>> +
>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>               incr_addr, buf, 0, size);
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this is the ouput
>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>> [   58.519115] ------------[ cut here ]------------
>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [   58.519283] sp : ffffffc01027b910
>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>> [   58.519366] Call trace:
>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>
>>>>
>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>> [  242.586996] ------------[ cut here ]------------
>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [  242.587166] sp : ffffffc01027b910
>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>> [  242.587249] Call trace:
>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>
>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>
>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>> to be DMA-safe.
>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>> and / or MMC controller drivers.
>>>
>>> Heiner
>>>
>>>
>> Hallo Heiner,
>>
>> i found a solution:
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> index a999f95062c7..b966217f3a6c 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>  /* Limit on rounding up frames */
>>  static const uint max_roundup = 512;
>>
>> -#define ALIGNMENT  4
>> +#define ALIGNMENT  8
>>
>>  enum brcmf_sdio_frmtype {
>>         BRCMF_SDIO_FT_NORMAL,
> 
> Hi Heiner,
> 
> Isn't a way to use the old behaviour with a badly aligned buffer ?
> 
Sure, it's not an either or. The driver can support both behaviors and we can dynamically
switch, e.g. after checking whether any segment of the scatterlist is unaligned.
It's just that it creates a certain overhead, in driver code and at runtime as well
(relatively big bounce buffer of 256k DMA coherent memory + copying all data to and from
bounce buffer).

On the other hand: There's only a handful of WiFi drivers with SDIO interface support
and so far vendors of meson-gx-based boards seem to use one of them only. We could go
and fix drivers only once by chance any vendor uses a WiFi chip with this other driver.
To me this risk seems acceptable, but of course others (MMC maintainer in particular)
may see this differently.

Heiner

> Neil
> 
> 

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 05.04.2017 um 15:37 schrieb Neil Armstrong:
> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>
>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>> this one?
>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +    }
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>
>>>>>>>>>>> here are the patches
>>>>>>>>>>>
>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>
>>>>>>>>>>>      /* data? */
>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>> be a bug
>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>> very small
>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>> that level:
>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>> small
>>>>>>>>>> transfers.
>>>>>>>>>>
>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>
>>>>>>>>>> Could you please apply:
>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>> following:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>>  {
>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>                     int err)
>>>>>>>>>>  {
>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>
>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>> +
>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>> +        int cnt;
>>>>>>>>>> +
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>> +    }
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>> clk_rate)
>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>              }
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> +        /*
>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>> +        */
>>>>>>>>>> +        if (small_read)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>> +
>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>          }
>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> here is  the result:
>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>
>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>> expected 0x16044330
>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>> rev=0
>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>> failed!
>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>> failed
>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>
>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>> in the 1. cmd53)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Helmut,
>>>>>>>>
>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>> regarding a not
>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>> for 64 bit DMA).
>>>>>>>>
>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>> latest next kernel.
>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>> but are not applied yet
>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>
>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>> version from March 10th.
>>>>>>>>
>>>>>>>> Thanks in advance,
>>>>>>>> Heiner
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>
>>>>>>> and
>>>>>>>
>>>>>>> i think, you did it!
>>>>>>>
>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>
>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>
>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>> without having loaded
>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>> so i cannot do any further tests.
>>>>>>>
>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>
>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>> linux-next. But failed to compile it
>>>>>>>
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>          ^
>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>> ?dma_map_sg?
>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>
>>>>>> tcp with the ethernet adpater is ok.
>>>>>>
>>>>>> but with the wlan i get warnings
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>
>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>> before the WARN_ON trace.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>> index d40744bb..15cf9820 100644
>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>> @@ -14,6 +14,7 @@
>>>>>  #include <linux/mmc/card.h>
>>>>>  #include <linux/mmc/sdio.h>
>>>>>  #include <linux/mmc/sdio_func.h>
>>>>> +#include <linux/mm.h>
>>>>>
>>>>>  #include "sdio_ops.h"
>>>>>  #include "core.h"
>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      unsigned remainder = size;
>>>>>      unsigned max_blocks;
>>>>>      int ret;
>>>>> +    void *buf_orig = buf;
>>>>> +    unsigned size_orig = size;
>>>>>
>>>>>      if (!func || (func->num > 7))
>>>>>          return -EINVAL;
>>>>>
>>>>> +    if (is_vmalloc_addr(buf))
>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>> +
>>>>> +    if (((unsigned long)buf) & 7)
>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>> +
>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>                  blocks = max_blocks;
>>>>>              size = blocks * func->cur_blksize;
>>>>>
>>>>> +            if (((unsigned long)buf) & 7)
>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>> +
>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>                  func->num, addr, incr_addr, buf,
>>>>>                  blocks, func->cur_blksize);
>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      while (remainder > 0) {
>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>
>>>>> +        if (((unsigned long)buf) & 7)
>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>> +
>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>               incr_addr, buf, 0, size);
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this is the ouput
>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>> [   58.519115] ------------[ cut here ]------------
>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [   58.519283] sp : ffffffc01027b910
>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>> [   58.519366] Call trace:
>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>
>>>>
>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>> [  242.586996] ------------[ cut here ]------------
>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [  242.587166] sp : ffffffc01027b910
>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>> [  242.587249] Call trace:
>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>
>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>
>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>> to be DMA-safe.
>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>> and / or MMC controller drivers.
>>>
>>> Heiner
>>>
>>>
>> Hallo Heiner,
>>
>> i found a solution:
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> index a999f95062c7..b966217f3a6c 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>  /* Limit on rounding up frames */
>>  static const uint max_roundup = 512;
>>
>> -#define ALIGNMENT  4
>> +#define ALIGNMENT  8
>>
>>  enum brcmf_sdio_frmtype {
>>         BRCMF_SDIO_FT_NORMAL,
> 
> Hi Heiner,
> 
> Isn't a way to use the old behaviour with a badly aligned buffer ?
> 
Sure, it's not an either or. The driver can support both behaviors and we can dynamically
switch, e.g. after checking whether any segment of the scatterlist is unaligned.
It's just that it creates a certain overhead, in driver code and at runtime as well
(relatively big bounce buffer of 256k DMA coherent memory + copying all data to and from
bounce buffer).

On the other hand: There's only a handful of WiFi drivers with SDIO interface support
and so far vendors of meson-gx-based boards seem to use one of them only. We could go
and fix drivers only once by chance any vendor uses a WiFi chip with this other driver.
To me this risk seems acceptable, but of course others (MMC maintainer in particular)
may see this differently.

Heiner

> Neil
> 
> 

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 05.04.2017 um 19:17 schrieb Helmut Klein:
> On 05.04.2017 15:37, Neil Armstrong wrote:
>> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>>> this one?
>>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>> +    }
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>>
>>>>>>>>>>>> here are the patches
>>>>>>>>>>>>
>>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>>
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>
>>>>>>>>>>>>      /* data? */
>>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>>> +
>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>> +
>>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> +
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>>> +
>>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>> +
>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>
>>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>>
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>      }
>>>>>>>>>>>>
>>>>>>>>>>>>      if (data) {
>>>>>>>>>>>> +
>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>> +
>>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>
>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> +
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>>> +
>>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>  }
>>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>> +
>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>
>>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>>> be a bug
>>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>>> very small
>>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>>> that level:
>>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>>> small
>>>>>>>>>>> transfers.
>>>>>>>>>>>
>>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>>
>>>>>>>>>>> Could you please apply:
>>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>>> following:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>          return NULL;
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>>> +{
>>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>  {
>>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>                     int err)
>>>>>>>>>>>  {
>>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>>
>>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>>> +
>>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>>> +        int cnt;
>>>>>>>>>>> +
>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>>> +    }
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>>> clk_rate)
>>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>              }
>>>>>>>>>>>          }
>>>>>>>>>>>
>>>>>>>>>>> +        /*
>>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>>> +        */
>>>>>>>>>>> +        if (small_read)
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>>> +
>>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>>          }
>>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>
>>>>>>>>>> here is  the result:
>>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>>
>>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>>> expected 0x16044330
>>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>>> rev=0
>>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported
>>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>>> failed!
>>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>>> failed
>>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>
>>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>>> in the 1. cmd53)
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Helmut,
>>>>>>>>>
>>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>>> regarding a not
>>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>>> for 64 bit DMA).
>>>>>>>>>
>>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>>> latest next kernel.
>>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>>> but are not applied yet
>>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>>
>>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>>> version from March 10th.
>>>>>>>>>
>>>>>>>>> Thanks in advance,
>>>>>>>>> Heiner
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>>
>>>>>>>> and
>>>>>>>>
>>>>>>>> i think, you did it!
>>>>>>>>
>>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>>
>>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>>
>>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>>> without having loaded
>>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>>> so i cannot do any further tests.
>>>>>>>>
>>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>>
>>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>>> linux-next. But failed to compile it
>>>>>>>>
>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>>          ^
>>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>>> ‘dma_map_sg’
>>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>>
>>>>>>> tcp with the ethernet adpater is ok.
>>>>>>>
>>>>>>> but with the wlan i get warnings
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>>
>>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>> Hallo Helmut,
>>>>>>
>>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>>> before the WARN_ON trace.
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>>> index d40744bb..15cf9820 100644
>>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>>> @@ -14,6 +14,7 @@
>>>>>>  #include <linux/mmc/card.h>
>>>>>>  #include <linux/mmc/sdio.h>
>>>>>>  #include <linux/mmc/sdio_func.h>
>>>>>> +#include <linux/mm.h>
>>>>>>
>>>>>>  #include "sdio_ops.h"
>>>>>>  #include "core.h"
>>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>      unsigned remainder = size;
>>>>>>      unsigned max_blocks;
>>>>>>      int ret;
>>>>>> +    void *buf_orig = buf;
>>>>>> +    unsigned size_orig = size;
>>>>>>
>>>>>>      if (!func || (func->num > 7))
>>>>>>          return -EINVAL;
>>>>>>
>>>>>> +    if (is_vmalloc_addr(buf))
>>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>>> +
>>>>>> +    if (((unsigned long)buf) & 7)
>>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>>> +
>>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>                  blocks = max_blocks;
>>>>>>              size = blocks * func->cur_blksize;
>>>>>>
>>>>>> +            if (((unsigned long)buf) & 7)
>>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>>> +
>>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>>                  func->num, addr, incr_addr, buf,
>>>>>>                  blocks, func->cur_blksize);
>>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>      while (remainder > 0) {
>>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>>
>>>>>> +        if (((unsigned long)buf) & 7)
>>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>>> +
>>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>>               incr_addr, buf, 0, size);
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> this is the ouput
>>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>> [   58.519115] ------------[ cut here ]------------
>>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>> [   58.519283] sp : ffffffc01027b910
>>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>>> [   58.519366] Call trace:
>>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>>
>>>>>
>>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>> [  242.586996] ------------[ cut here ]------------
>>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>> [  242.587166] sp : ffffffc01027b910
>>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>>> [  242.587249] Call trace:
>>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>>
>>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>>
>>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>>> to be DMA-safe.
>>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>>> and / or MMC controller drivers.
>>>>
>>>> Heiner
>>>>
>>>>
>>> Hallo Heiner,
>>>
>>> i found a solution:
>>>
>>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> index a999f95062c7..b966217f3a6c 100644
>>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>>  /* Limit on rounding up frames */
>>>  static const uint max_roundup = 512;
>>>
>>> -#define ALIGNMENT  4
>>> +#define ALIGNMENT  8
>>>
>>>  enum brcmf_sdio_frmtype {
>>>         BRCMF_SDIO_FT_NORMAL,
>>
>> Hi Heiner,
>>
>> Isn't a way to use the old behaviour with a badly aligned buffer ?
>>
>> Neil
>>
>>
> 
> "a solution" was a bad expression.
> 
> with my mail i wanted to show, that
> - Heiners drivers is, when receiving correctly aligned buffers, perfectly operational
> - the performance isn't better than that of the amlogic driver, which uses, as much as i can see, a bounce buffer for sdio
> 
In the case of SDIO I would assume that usually the device is the limiting factor, not the controller driver.
For eMMC this may be different.

> and what was surprising for me:
> - the code for the buffer aligment inside of brcmfmac uses a locally defined value. isn't there a global definition for this??
> - handling for buffer alignment seems IMHO inconsistent in the kernel
> 
This is my impression too. There's not really a consistent way to say in an API: This pointer must not reference
non-DMA'able memory. AFAIK not even a weak option similar to the __iomem annotation is available.

> Helmut
> 

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 05.04.2017 um 19:17 schrieb Helmut Klein:
> On 05.04.2017 15:37, Neil Armstrong wrote:
>> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>>> this one?
>>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>> +    }
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>>
>>>>>>>>>>>> here are the patches
>>>>>>>>>>>>
>>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>>
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>
>>>>>>>>>>>>      /* data? */
>>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>>> +
>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>> +
>>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> +
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>>> +
>>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>> +
>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>
>>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>>
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>      }
>>>>>>>>>>>>
>>>>>>>>>>>>      if (data) {
>>>>>>>>>>>> +
>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>> +
>>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>
>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> +
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>>> +
>>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>  }
>>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>
>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>> +
>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>
>>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>>> be a bug
>>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>>> very small
>>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>>> that level:
>>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>>> small
>>>>>>>>>>> transfers.
>>>>>>>>>>>
>>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>>
>>>>>>>>>>> Could you please apply:
>>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>>> following:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>          return NULL;
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>>> +{
>>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>  {
>>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>                     int err)
>>>>>>>>>>>  {
>>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>>
>>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>>> +
>>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>>> +        int cnt;
>>>>>>>>>>> +
>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>>> +    }
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>>> clk_rate)
>>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>              }
>>>>>>>>>>>          }
>>>>>>>>>>>
>>>>>>>>>>> +        /*
>>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>>> +        */
>>>>>>>>>>> +        if (small_read)
>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>>> +
>>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>>          }
>>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>
>>>>>>>>>> here is  the result:
>>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>>
>>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>>> expected 0x16044330
>>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>>> rev=0
>>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported
>>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>>> failed!
>>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>>> failed
>>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>
>>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>>> in the 1. cmd53)
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Helmut,
>>>>>>>>>
>>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>>> regarding a not
>>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>>> for 64 bit DMA).
>>>>>>>>>
>>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>>> latest next kernel.
>>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>>> but are not applied yet
>>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>>
>>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>>> version from March 10th.
>>>>>>>>>
>>>>>>>>> Thanks in advance,
>>>>>>>>> Heiner
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>>
>>>>>>>> and
>>>>>>>>
>>>>>>>> i think, you did it!
>>>>>>>>
>>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>>
>>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>>
>>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>>> without having loaded
>>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>>> so i cannot do any further tests.
>>>>>>>>
>>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>>
>>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>>> linux-next. But failed to compile it
>>>>>>>>
>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>>          ^
>>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>>> ?dma_map_sg?
>>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>>
>>>>>>> tcp with the ethernet adpater is ok.
>>>>>>>
>>>>>>> but with the wlan i get warnings
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>>
>>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>> Hallo Helmut,
>>>>>>
>>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>>> before the WARN_ON trace.
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>>> index d40744bb..15cf9820 100644
>>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>>> @@ -14,6 +14,7 @@
>>>>>>  #include <linux/mmc/card.h>
>>>>>>  #include <linux/mmc/sdio.h>
>>>>>>  #include <linux/mmc/sdio_func.h>
>>>>>> +#include <linux/mm.h>
>>>>>>
>>>>>>  #include "sdio_ops.h"
>>>>>>  #include "core.h"
>>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>      unsigned remainder = size;
>>>>>>      unsigned max_blocks;
>>>>>>      int ret;
>>>>>> +    void *buf_orig = buf;
>>>>>> +    unsigned size_orig = size;
>>>>>>
>>>>>>      if (!func || (func->num > 7))
>>>>>>          return -EINVAL;
>>>>>>
>>>>>> +    if (is_vmalloc_addr(buf))
>>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>>> +
>>>>>> +    if (((unsigned long)buf) & 7)
>>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>>> +
>>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>                  blocks = max_blocks;
>>>>>>              size = blocks * func->cur_blksize;
>>>>>>
>>>>>> +            if (((unsigned long)buf) & 7)
>>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>>> +
>>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>>                  func->num, addr, incr_addr, buf,
>>>>>>                  blocks, func->cur_blksize);
>>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>      while (remainder > 0) {
>>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>>
>>>>>> +        if (((unsigned long)buf) & 7)
>>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>>> +
>>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>>               incr_addr, buf, 0, size);
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> this is the ouput
>>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>> [   58.519115] ------------[ cut here ]------------
>>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>> [   58.519283] sp : ffffffc01027b910
>>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>>> [   58.519366] Call trace:
>>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>>
>>>>>
>>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>> [  242.586996] ------------[ cut here ]------------
>>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>> [  242.587166] sp : ffffffc01027b910
>>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>>> [  242.587249] Call trace:
>>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>>
>>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>>
>>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>>> to be DMA-safe.
>>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>>> and / or MMC controller drivers.
>>>>
>>>> Heiner
>>>>
>>>>
>>> Hallo Heiner,
>>>
>>> i found a solution:
>>>
>>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> index a999f95062c7..b966217f3a6c 100644
>>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>>  /* Limit on rounding up frames */
>>>  static const uint max_roundup = 512;
>>>
>>> -#define ALIGNMENT  4
>>> +#define ALIGNMENT  8
>>>
>>>  enum brcmf_sdio_frmtype {
>>>         BRCMF_SDIO_FT_NORMAL,
>>
>> Hi Heiner,
>>
>> Isn't a way to use the old behaviour with a badly aligned buffer ?
>>
>> Neil
>>
>>
> 
> "a solution" was a bad expression.
> 
> with my mail i wanted to show, that
> - Heiners drivers is, when receiving correctly aligned buffers, perfectly operational
> - the performance isn't better than that of the amlogic driver, which uses, as much as i can see, a bounce buffer for sdio
> 
In the case of SDIO I would assume that usually the device is the limiting factor, not the controller driver.
For eMMC this may be different.

> and what was surprising for me:
> - the code for the buffer aligment inside of brcmfmac uses a locally defined value. isn't there a global definition for this??
> - handling for buffer alignment seems IMHO inconsistent in the kernel
> 
This is my impression too. There's not really a consistent way to say in an API: This pointer must not reference
non-DMA'able memory. AFAIK not even a weak option similar to the __iomem annotation is available.

> Helmut
> 

Re: meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 05.04.2017 um 14:38 schrieb Helmut Klein:
> On 05.04.2017 08:02, Heiner Kallweit wrote:
>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>> and
>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>
>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>> this one?
>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>
>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>> +
>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>
>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>
>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>> +    }
>>>>>>>>>>>> +
>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>> but without a positiv result
>>>>>>>>>>
>>>>>>>>>> here are the patches
>>>>>>>>>>
>>>>>>>>>> for the fully operational version
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>
>>>>>>>>>>      /* data? */
>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>  }
>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>> be a bug
>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>> very small
>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>> that level:
>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>> small
>>>>>>>>> transfers.
>>>>>>>>>
>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>> Let's try this as workaround.
>>>>>>>>>
>>>>>>>>> Could you please apply:
>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>> following:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>          return NULL;
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>> +{
>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>> mmc_data *data)
>>>>>>>>>  {
>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq,
>>>>>>>>>                     int err)
>>>>>>>>>  {
>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>
>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>> +
>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>> +        int cnt;
>>>>>>>>> +
>>>>>>>>> +        dma_rmb();
>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>> +    }
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>> clk_rate)
>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>>      if (data) {
>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>> +
>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>
>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>              }
>>>>>>>>>          }
>>>>>>>>>
>>>>>>>>> +        /*
>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>> +        */
>>>>>>>>> +        if (small_read)
>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>> +
>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>          }
>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> here is  the result:
>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>
>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>> expected 0x16044330
>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>> rev=0
>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>> failed!
>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>> failed
>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>
>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>> in the 1. cmd53)
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Helmut,
>>>>>>>
>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>> regarding a not
>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>> for 64 bit DMA).
>>>>>>>
>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>> latest next kernel.
>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>> but are not applied yet
>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>
>>>>>>> By the way, if you go with latest next kernel:
>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>> version from March 10th.
>>>>>>>
>>>>>>> Thanks in advance,
>>>>>>> Heiner
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>
>>>>>> and
>>>>>>
>>>>>> i think, you did it!
>>>>>>
>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>
>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>
>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>> without having loaded
>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>> so i cannot do any further tests.
>>>>>>
>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>> much better then with to old driver (none sg-list)
>>>>>>
>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>> linux-next. But failed to compile it
>>>>>>
>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>          mmc_get_dma_dir(data));
>>>>>>          ^
>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>> ‘dma_map_sg’
>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>
>>>>> tcp with the ethernet adpater is ok.
>>>>>
>>>>> but with the wlan i get warnings
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>
>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>
>>>>> Helmut
>>>>>
>>>>
>>>> Hallo Helmut,
>>>>
>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>> before the WARN_ON trace.
>>>>
>>>> Thanks, Heiner
>>>>
>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>> index d40744bb..15cf9820 100644
>>>> --- a/drivers/mmc/core/sdio_io.c
>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>> @@ -14,6 +14,7 @@
>>>>  #include <linux/mmc/card.h>
>>>>  #include <linux/mmc/sdio.h>
>>>>  #include <linux/mmc/sdio_func.h>
>>>> +#include <linux/mm.h>
>>>>
>>>>  #include "sdio_ops.h"
>>>>  #include "core.h"
>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      unsigned remainder = size;
>>>>      unsigned max_blocks;
>>>>      int ret;
>>>> +    void *buf_orig = buf;
>>>> +    unsigned size_orig = size;
>>>>
>>>>      if (!func || (func->num > 7))
>>>>          return -EINVAL;
>>>>
>>>> +    if (is_vmalloc_addr(buf))
>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>> +
>>>> +    if (((unsigned long)buf) & 7)
>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>> +
>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>          /* Blocks per command is limited by host count, host transfer
>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>                  blocks = max_blocks;
>>>>              size = blocks * func->cur_blksize;
>>>>
>>>> +            if (((unsigned long)buf) & 7)
>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>> +
>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>                  func->num, addr, incr_addr, buf,
>>>>                  blocks, func->cur_blksize);
>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      while (remainder > 0) {
>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>
>>>> +        if (((unsigned long)buf) & 7)
>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>> +
>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>               incr_addr, buf, 0, size);
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> this is the ouput
>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>> [   58.519115] ------------[ cut here ]------------
>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [   58.519283] sp : ffffffc01027b910
>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>> [   58.519366] Call trace:
>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>
>>>
>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>> [  242.586996] ------------[ cut here ]------------
>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [  242.587166] sp : ffffffc01027b910
>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>> [  242.587249] Call trace:
>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>
>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>
>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>
>>> Helmut
>>>
>>>
>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>> to be DMA-safe.
>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>> and / or MMC controller drivers.
>>
>> Heiner
>>
>>
> Hallo Heiner,
> 
> i found a solution:
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> index a999f95062c7..b966217f3a6c 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>  /* Limit on rounding up frames */
>  static const uint max_roundup = 512;
> 
> -#define ALIGNMENT  4
> +#define ALIGNMENT  8
> 
>  enum brcmf_sdio_frmtype {
>         BRCMF_SDIO_FT_NORMAL,

Just by chance I came across the same setting today and was about to ask you to test it.
Very nice that it solves the issue. However most likely we have to make this chance only
if the platform uses 64 bit DMA.
I will submit a patch with your "Suggested-by".

Regarding your performance figures:
How was it with the mainline driver before the switch to descriptor chain mode?

Heiner

meson-gx-mmc: 2nd patch set

[Heiner Kallweit]

Am 05.04.2017 um 14:38 schrieb Helmut Klein:
> On 05.04.2017 08:02, Heiner Kallweit wrote:
>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>> and
>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>
>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>> this one?
>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>
>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>> +
>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>
>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>
>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>> +    }
>>>>>>>>>>>> +
>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>> but without a positiv result
>>>>>>>>>>
>>>>>>>>>> here are the patches
>>>>>>>>>>
>>>>>>>>>> for the fully operational version
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>
>>>>>>>>>>      /* data? */
>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +
>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>
>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>> +
>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>> 0x%08x",
>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>> +
>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>  }
>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>
>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>> +
>>>>>>>>>>      if (!status) {
>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>
>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>> be a bug
>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>> very small
>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>> that level:
>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>> small
>>>>>>>>> transfers.
>>>>>>>>>
>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>> Let's try this as workaround.
>>>>>>>>>
>>>>>>>>> Could you please apply:
>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>> following:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>          return NULL;
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>> +{
>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>> +}
>>>>>>>>> +
>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>> mmc_data *data)
>>>>>>>>>  {
>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>> mmc_request *mrq,
>>>>>>>>>                     int err)
>>>>>>>>>  {
>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>
>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>> +
>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>> +        int cnt;
>>>>>>>>> +
>>>>>>>>> +        dma_rmb();
>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>> +    }
>>>>>>>>>  }
>>>>>>>>>
>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>> clk_rate)
>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>      }
>>>>>>>>>
>>>>>>>>>      if (data) {
>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>> +
>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>
>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>              }
>>>>>>>>>          }
>>>>>>>>>
>>>>>>>>> +        /*
>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>> +        */
>>>>>>>>> +        if (small_read)
>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>> +
>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>          }
>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> here is  the result:
>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>
>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>> nsac 0
>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>> 00000000
>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>> expected 0x16044330
>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>> rev=0
>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>> supported
>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>> failed!
>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>> failed
>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>
>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>> in the 1. cmd53)
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Helmut,
>>>>>>>
>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>> regarding a not
>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>> for 64 bit DMA).
>>>>>>>
>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>> latest next kernel.
>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>> but are not applied yet
>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>
>>>>>>> By the way, if you go with latest next kernel:
>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>> version from March 10th.
>>>>>>>
>>>>>>> Thanks in advance,
>>>>>>> Heiner
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>
>>>>>> and
>>>>>>
>>>>>> i think, you did it!
>>>>>>
>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>
>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>
>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>> without having loaded
>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>> so i cannot do any further tests.
>>>>>>
>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>> much better then with to old driver (none sg-list)
>>>>>>
>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>> linux-next. But failed to compile it
>>>>>>
>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>>          mmc_get_dma_dir(data));
>>>>>>          ^
>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>> ?dma_map_sg?
>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>
>>>>> tcp with the ethernet adpater is ok.
>>>>>
>>>>> but with the wlan i get warnings
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>
>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>
>>>>> Helmut
>>>>>
>>>>
>>>> Hallo Helmut,
>>>>
>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>> before the WARN_ON trace.
>>>>
>>>> Thanks, Heiner
>>>>
>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>> index d40744bb..15cf9820 100644
>>>> --- a/drivers/mmc/core/sdio_io.c
>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>> @@ -14,6 +14,7 @@
>>>>  #include <linux/mmc/card.h>
>>>>  #include <linux/mmc/sdio.h>
>>>>  #include <linux/mmc/sdio_func.h>
>>>> +#include <linux/mm.h>
>>>>
>>>>  #include "sdio_ops.h"
>>>>  #include "core.h"
>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      unsigned remainder = size;
>>>>      unsigned max_blocks;
>>>>      int ret;
>>>> +    void *buf_orig = buf;
>>>> +    unsigned size_orig = size;
>>>>
>>>>      if (!func || (func->num > 7))
>>>>          return -EINVAL;
>>>>
>>>> +    if (is_vmalloc_addr(buf))
>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>> +
>>>> +    if (((unsigned long)buf) & 7)
>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>> +
>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>          /* Blocks per command is limited by host count, host transfer
>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>                  blocks = max_blocks;
>>>>              size = blocks * func->cur_blksize;
>>>>
>>>> +            if (((unsigned long)buf) & 7)
>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>> +
>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>                  func->num, addr, incr_addr, buf,
>>>>                  blocks, func->cur_blksize);
>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>      while (remainder > 0) {
>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>
>>>> +        if (((unsigned long)buf) & 7)
>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>> +
>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>               incr_addr, buf, 0, size);
>>>>
>>>
>>> Hallo Heiner,
>>>
>>> this is the ouput
>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>> [   58.519115] ------------[ cut here ]------------
>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [   58.519283] sp : ffffffc01027b910
>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>> [   58.519366] Call trace:
>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>
>>>
>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>> [  242.586996] ------------[ cut here ]------------
>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>> [  242.587166] sp : ffffffc01027b910
>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>> [  242.587249] Call trace:
>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>
>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>
>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>
>>> Helmut
>>>
>>>
>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>> to be DMA-safe.
>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>> and / or MMC controller drivers.
>>
>> Heiner
>>
>>
> Hallo Heiner,
> 
> i found a solution:
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> index a999f95062c7..b966217f3a6c 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>  /* Limit on rounding up frames */
>  static const uint max_roundup = 512;
> 
> -#define ALIGNMENT  4
> +#define ALIGNMENT  8
> 
>  enum brcmf_sdio_frmtype {
>         BRCMF_SDIO_FT_NORMAL,

Just by chance I came across the same setting today and was about to ask you to test it.
Very nice that it solves the issue. However most likely we have to make this chance only
if the platform uses 64 bit DMA.
I will submit a patch with your "Suggested-by".

Regarding your performance figures:
How was it with the mainline driver before the switch to descriptor chain mode?

Heiner

Re: meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 05.04.2017 20:13, Heiner Kallweit wrote:
> Am 05.04.2017 um 14:38 schrieb Helmut Klein:
>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>
>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>> this one?
>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +    }
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>
>>>>>>>>>>> here are the patches
>>>>>>>>>>>
>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>
>>>>>>>>>>>      /* data? */
>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>> be a bug
>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>> very small
>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>> that level:
>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>> small
>>>>>>>>>> transfers.
>>>>>>>>>>
>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>
>>>>>>>>>> Could you please apply:
>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>> following:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>>  {
>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>                     int err)
>>>>>>>>>>  {
>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>
>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>> +
>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>> +        int cnt;
>>>>>>>>>> +
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>> +    }
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>> clk_rate)
>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>              }
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> +        /*
>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>> +        */
>>>>>>>>>> +        if (small_read)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>> +
>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>          }
>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> here is  the result:
>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>
>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>> expected 0x16044330
>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>> rev=0
>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>> failed!
>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>> failed
>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>
>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>> in the 1. cmd53)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Helmut,
>>>>>>>>
>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>> regarding a not
>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>> for 64 bit DMA).
>>>>>>>>
>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>> latest next kernel.
>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>> but are not applied yet
>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>
>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>> version from March 10th.
>>>>>>>>
>>>>>>>> Thanks in advance,
>>>>>>>> Heiner
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>
>>>>>>> and
>>>>>>>
>>>>>>> i think, you did it!
>>>>>>>
>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>
>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>
>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>> without having loaded
>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>> so i cannot do any further tests.
>>>>>>>
>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>
>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>> linux-next. But failed to compile it
>>>>>>>
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>          ^
>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>> ‘dma_map_sg’
>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>
>>>>>> tcp with the ethernet adpater is ok.
>>>>>>
>>>>>> but with the wlan i get warnings
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>
>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>> before the WARN_ON trace.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>> index d40744bb..15cf9820 100644
>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>> @@ -14,6 +14,7 @@
>>>>>  #include <linux/mmc/card.h>
>>>>>  #include <linux/mmc/sdio.h>
>>>>>  #include <linux/mmc/sdio_func.h>
>>>>> +#include <linux/mm.h>
>>>>>
>>>>>  #include "sdio_ops.h"
>>>>>  #include "core.h"
>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      unsigned remainder = size;
>>>>>      unsigned max_blocks;
>>>>>      int ret;
>>>>> +    void *buf_orig = buf;
>>>>> +    unsigned size_orig = size;
>>>>>
>>>>>      if (!func || (func->num > 7))
>>>>>          return -EINVAL;
>>>>>
>>>>> +    if (is_vmalloc_addr(buf))
>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>> +
>>>>> +    if (((unsigned long)buf) & 7)
>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>> +
>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>                  blocks = max_blocks;
>>>>>              size = blocks * func->cur_blksize;
>>>>>
>>>>> +            if (((unsigned long)buf) & 7)
>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>> +
>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>                  func->num, addr, incr_addr, buf,
>>>>>                  blocks, func->cur_blksize);
>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      while (remainder > 0) {
>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>
>>>>> +        if (((unsigned long)buf) & 7)
>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>> +
>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>               incr_addr, buf, 0, size);
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this is the ouput
>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>> [   58.519115] ------------[ cut here ]------------
>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [   58.519283] sp : ffffffc01027b910
>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>> [   58.519366] Call trace:
>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>
>>>>
>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>> [  242.586996] ------------[ cut here ]------------
>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [  242.587166] sp : ffffffc01027b910
>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>> [  242.587249] Call trace:
>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>
>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>
>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>> to be DMA-safe.
>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>> and / or MMC controller drivers.
>>>
>>> Heiner
>>>
>>>
>> Hallo Heiner,
>>
>> i found a solution:
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> index a999f95062c7..b966217f3a6c 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>  /* Limit on rounding up frames */
>>  static const uint max_roundup = 512;
>>
>> -#define ALIGNMENT  4
>> +#define ALIGNMENT  8
>>
>>  enum brcmf_sdio_frmtype {
>>         BRCMF_SDIO_FT_NORMAL,
>
> Just by chance I came across the same setting today and was about to ask you to test it.
> Very nice that it solves the issue. However most likely we have to make this chance only
> if the platform uses 64 bit DMA.
> I will submit a patch with your "Suggested-by".
>
> Regarding your performance figures:
> How was it with the mainline driver before the switch to descriptor chain mode?
>
> Heiner
>
>

Hallo Heiner,

both driver versions (pure linux-next and the descriptor chain) show the 
same speeds.
when positioning my box directly in front of my router (fritz!box 7390), 
i get
sending: 17.3 MBit/s
receiving: 34 MBit/s

the amlogic kernel (3.14.73) gets 40.5 MBit/s in both directions.

Helmut

meson-gx-mmc: 2nd patch set

[Helmut Klein]

On 05.04.2017 20:13, Heiner Kallweit wrote:
> Am 05.04.2017 um 14:38 schrieb Helmut Klein:
>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>
>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>> this one?
>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>
>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>> +    }
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>
>>>>>>>>>>> here are the patches
>>>>>>>>>>>
>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>
>>>>>>>>>>>      /* data? */
>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>  }
>>>>>>>>>>>
>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      }
>>>>>>>>>>>
>>>>>>>>>>>      if (data) {
>>>>>>>>>>> +
>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>> +
>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>
>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>> +
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>> 0x%08x",
>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>> +
>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>  }
>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>
>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>> +
>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>
>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>> be a bug
>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>> very small
>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>> that level:
>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>> small
>>>>>>>>>> transfers.
>>>>>>>>>>
>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>
>>>>>>>>>> Could you please apply:
>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>> following:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>          return NULL;
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>> +{
>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>> +}
>>>>>>>>>> +
>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>> mmc_data *data)
>>>>>>>>>>  {
>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>                     int err)
>>>>>>>>>>  {
>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>
>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>> +
>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>> +        int cnt;
>>>>>>>>>> +
>>>>>>>>>> +        dma_rmb();
>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>> +    }
>>>>>>>>>>  }
>>>>>>>>>>
>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>> clk_rate)
>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>      }
>>>>>>>>>>
>>>>>>>>>>      if (data) {
>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>> +
>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>
>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>              }
>>>>>>>>>>          }
>>>>>>>>>>
>>>>>>>>>> +        /*
>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>> +        */
>>>>>>>>>> +        if (small_read)
>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>> +
>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>          }
>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> here is  the result:
>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>
>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>> nsac 0
>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>> 00000000
>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>> expected 0x16044330
>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>> rev=0
>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>> supported
>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>> failed!
>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>> failed
>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>
>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>> in the 1. cmd53)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Helmut,
>>>>>>>>
>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>> regarding a not
>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>> for 64 bit DMA).
>>>>>>>>
>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>> latest next kernel.
>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>> but are not applied yet
>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>
>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>> version from March 10th.
>>>>>>>>
>>>>>>>> Thanks in advance,
>>>>>>>> Heiner
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>
>>>>>>> and
>>>>>>>
>>>>>>> i think, you did it!
>>>>>>>
>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>
>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>
>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>> without having loaded
>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>> so i cannot do any further tests.
>>>>>>>
>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>
>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>> linux-next. But failed to compile it
>>>>>>>
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>          ^
>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>> ?dma_map_sg?
>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>
>>>>>> tcp with the ethernet adpater is ok.
>>>>>>
>>>>>> but with the wlan i get warnings
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>
>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>
>>>>> Hallo Helmut,
>>>>>
>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>> before the WARN_ON trace.
>>>>>
>>>>> Thanks, Heiner
>>>>>
>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>> index d40744bb..15cf9820 100644
>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>> @@ -14,6 +14,7 @@
>>>>>  #include <linux/mmc/card.h>
>>>>>  #include <linux/mmc/sdio.h>
>>>>>  #include <linux/mmc/sdio_func.h>
>>>>> +#include <linux/mm.h>
>>>>>
>>>>>  #include "sdio_ops.h"
>>>>>  #include "core.h"
>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      unsigned remainder = size;
>>>>>      unsigned max_blocks;
>>>>>      int ret;
>>>>> +    void *buf_orig = buf;
>>>>> +    unsigned size_orig = size;
>>>>>
>>>>>      if (!func || (func->num > 7))
>>>>>          return -EINVAL;
>>>>>
>>>>> +    if (is_vmalloc_addr(buf))
>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>> +
>>>>> +    if (((unsigned long)buf) & 7)
>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>> +
>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>                  blocks = max_blocks;
>>>>>              size = blocks * func->cur_blksize;
>>>>>
>>>>> +            if (((unsigned long)buf) & 7)
>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>> +
>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>                  func->num, addr, incr_addr, buf,
>>>>>                  blocks, func->cur_blksize);
>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>      while (remainder > 0) {
>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>
>>>>> +        if (((unsigned long)buf) & 7)
>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>> +
>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>               incr_addr, buf, 0, size);
>>>>>
>>>>
>>>> Hallo Heiner,
>>>>
>>>> this is the ouput
>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>> [   58.519115] ------------[ cut here ]------------
>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [   58.519283] sp : ffffffc01027b910
>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>> [   58.519366] Call trace:
>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>
>>>>
>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>> [  242.586996] ------------[ cut here ]------------
>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>> [  242.587166] sp : ffffffc01027b910
>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>> [  242.587249] Call trace:
>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>
>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>
>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>
>>>> Helmut
>>>>
>>>>
>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>> to be DMA-safe.
>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>> and / or MMC controller drivers.
>>>
>>> Heiner
>>>
>>>
>> Hallo Heiner,
>>
>> i found a solution:
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> index a999f95062c7..b966217f3a6c 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>  /* Limit on rounding up frames */
>>  static const uint max_roundup = 512;
>>
>> -#define ALIGNMENT  4
>> +#define ALIGNMENT  8
>>
>>  enum brcmf_sdio_frmtype {
>>         BRCMF_SDIO_FT_NORMAL,
>
> Just by chance I came across the same setting today and was about to ask you to test it.
> Very nice that it solves the issue. However most likely we have to make this chance only
> if the platform uses 64 bit DMA.
> I will submit a patch with your "Suggested-by".
>
> Regarding your performance figures:
> How was it with the mainline driver before the switch to descriptor chain mode?
>
> Heiner
>
>

Hallo Heiner,

both driver versions (pure linux-next and the descriptor chain) show the 
same speeds.
when positioning my box directly in front of my router (fritz!box 7390), 
i get
sending: 17.3 MBit/s
receiving: 34 MBit/s

the amlogic kernel (3.14.73) gets 40.5 MBit/s in both directions.

Helmut

Re: meson-gx-mmc: 2nd patch set

[Neil Armstrong]

On 04/05/2017 07:56 PM, Heiner Kallweit wrote:
> Am 05.04.2017 um 19:17 schrieb Helmut Klein:
>> On 05.04.2017 15:37, Neil Armstrong wrote:
>>> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>>>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>>>> this one?
>>>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +    }
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>>>
>>>>>>>>>>>>> here are the patches
>>>>>>>>>>>>>
>>>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>>>
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* data? */
>>>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>>> +
>>>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>>
>>>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>>>
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>      }
>>>>>>>>>>>>>
>>>>>>>>>>>>>      if (data) {
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>>> +
>>>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>>
>>>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>>>> be a bug
>>>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>>>> very small
>>>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>>>> that level:
>>>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>>>> small
>>>>>>>>>>>> transfers.
>>>>>>>>>>>>
>>>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please apply:
>>>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>>>> following:
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>                     int err)
>>>>>>>>>>>>  {
>>>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>>>
>>>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>>>> +        int cnt;
>>>>>>>>>>>> +
>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>>>> +    }
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>>>> clk_rate)
>>>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>      }
>>>>>>>>>>>>
>>>>>>>>>>>>      if (data) {
>>>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>>>> +
>>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>              }
>>>>>>>>>>>>          }
>>>>>>>>>>>>
>>>>>>>>>>>> +        /*
>>>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>>>> +        */
>>>>>>>>>>>> +        if (small_read)
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>>>> +
>>>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>>>          }
>>>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>
>>>>>>>>>>> here is  the result:
>>>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>>> nsac 0
>>>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>>>
>>>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>>> nsac 0
>>>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>>>> expected 0x16044330
>>>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>>>> rev=0
>>>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported
>>>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>>>> failed!
>>>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>>>> failed
>>>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>
>>>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>>>> in the 1. cmd53)
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Hallo Helmut,
>>>>>>>>>>
>>>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>>>> regarding a not
>>>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>>>> for 64 bit DMA).
>>>>>>>>>>
>>>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>>>> latest next kernel.
>>>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>>>> but are not applied yet
>>>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>>>
>>>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>>>> version from March 10th.
>>>>>>>>>>
>>>>>>>>>> Thanks in advance,
>>>>>>>>>> Heiner
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>>>
>>>>>>>>> and
>>>>>>>>>
>>>>>>>>> i think, you did it!
>>>>>>>>>
>>>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>>>
>>>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>>>
>>>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>>>> without having loaded
>>>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>>>> so i cannot do any further tests.
>>>>>>>>>
>>>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>>>
>>>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>>>> linux-next. But failed to compile it
>>>>>>>>>
>>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>>>          ^
>>>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>>>> ‘dma_map_sg’
>>>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>>>
>>>>>>>> tcp with the ethernet adpater is ok.
>>>>>>>>
>>>>>>>> but with the wlan i get warnings
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>>>
>>>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Helmut,
>>>>>>>
>>>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>>>> before the WARN_ON trace.
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>>>> index d40744bb..15cf9820 100644
>>>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>>>> @@ -14,6 +14,7 @@
>>>>>>>  #include <linux/mmc/card.h>
>>>>>>>  #include <linux/mmc/sdio.h>
>>>>>>>  #include <linux/mmc/sdio_func.h>
>>>>>>> +#include <linux/mm.h>
>>>>>>>
>>>>>>>  #include "sdio_ops.h"
>>>>>>>  #include "core.h"
>>>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>>      unsigned remainder = size;
>>>>>>>      unsigned max_blocks;
>>>>>>>      int ret;
>>>>>>> +    void *buf_orig = buf;
>>>>>>> +    unsigned size_orig = size;
>>>>>>>
>>>>>>>      if (!func || (func->num > 7))
>>>>>>>          return -EINVAL;
>>>>>>>
>>>>>>> +    if (is_vmalloc_addr(buf))
>>>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>>>> +
>>>>>>> +    if (((unsigned long)buf) & 7)
>>>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>>>> +
>>>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>>                  blocks = max_blocks;
>>>>>>>              size = blocks * func->cur_blksize;
>>>>>>>
>>>>>>> +            if (((unsigned long)buf) & 7)
>>>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>>>> +
>>>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>>>                  func->num, addr, incr_addr, buf,
>>>>>>>                  blocks, func->cur_blksize);
>>>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>>      while (remainder > 0) {
>>>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>>>
>>>>>>> +        if (((unsigned long)buf) & 7)
>>>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>>>> +
>>>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>>>               incr_addr, buf, 0, size);
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this is the ouput
>>>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>>> [   58.519115] ------------[ cut here ]------------
>>>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>>> [   58.519283] sp : ffffffc01027b910
>>>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>>>> [   58.519366] Call trace:
>>>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>>>
>>>>>>
>>>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>>> [  242.586996] ------------[ cut here ]------------
>>>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>>> [  242.587166] sp : ffffffc01027b910
>>>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>>>> [  242.587249] Call trace:
>>>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>>>
>>>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>>>
>>>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>>>> to be DMA-safe.
>>>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>>>> and / or MMC controller drivers.
>>>>>
>>>>> Heiner
>>>>>
>>>>>
>>>> Hallo Heiner,
>>>>
>>>> i found a solution:
>>>>
>>>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>> index a999f95062c7..b966217f3a6c 100644
>>>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>>>  /* Limit on rounding up frames */
>>>>  static const uint max_roundup = 512;
>>>>
>>>> -#define ALIGNMENT  4
>>>> +#define ALIGNMENT  8
>>>>
>>>>  enum brcmf_sdio_frmtype {
>>>>         BRCMF_SDIO_FT_NORMAL,
>>>
>>> Hi Heiner,
>>>
>>> Isn't a way to use the old behaviour with a badly aligned buffer ?
>>>
>>> Neil
>>>
>>>
>>
>> "a solution" was a bad expression.
>>
>> with my mail i wanted to show, that
>> - Heiners drivers is, when receiving correctly aligned buffers, perfectly operational
>> - the performance isn't better than that of the amlogic driver, which uses, as much as i can see, a bounce buffer for sdio
>>
> In the case of SDIO I would assume that usually the device is the limiting factor, not the controller driver.
> For eMMC this may be different.
> 
>> and what was surprising for me:
>> - the code for the buffer aligment inside of brcmfmac uses a locally defined value. isn't there a global definition for this??
>> - handling for buffer alignment seems IMHO inconsistent in the kernel
>>
> This is my impression too. There's not really a consistent way to say in an API: This pointer must not reference
> non-DMA'able memory. AFAIK not even a weak option similar to the __iomem annotation is available.
> 
>> Helmut
>>
> 


You can try to fix all the SDIO upstream drivers, but you will need to support
such unaligned buffer because you have a lot on uncontrollable off-tree sdio driver
like the broadcom or the realtek ones.

And comparing amlogic kernel and in-kernel sdio driver is nonsense because the amlogic
kernel uses off-tree optimized drivers.

Don't care about the efficiency, provide the old mechanism for non-aligned buffers because
it's out of your scope here.

Neil

meson-gx-mmc: 2nd patch set

[Neil Armstrong]

On 04/05/2017 07:56 PM, Heiner Kallweit wrote:
> Am 05.04.2017 um 19:17 schrieb Helmut Klein:
>> On 05.04.2017 15:37, Neil Armstrong wrote:
>>> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>>>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> [    1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    1.873258] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    1.876731] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.882597] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>>> [    2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>>> [    2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>>> [    2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    2.164206]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>>> [    6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>>>> version = wl0: Jan  6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>>>> [    6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>>> [    6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>>>> [    6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>>>> [    6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>>>> [    6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>>>> [    6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>>>> [    6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>>> [    6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>>>> [    6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> [    1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    1.873273] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    1.876765] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.882621] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>>> [    2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>>> [    2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>>> [    2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    2.163910]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>>> [    6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>>>> [    6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>>>> [    6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> [    1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    1.869159] mmcblk0: mmc0:0001 NCard  14.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    1.872639] mmcblk0boot0: mmc0:0001 NCard  partition 1
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.878497] mmcblk0boot1: mmc0:0001 NCard  partition 2
>>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>>> [    1.884356] mmcblk0rpmb: mmc0:0001 NCard  partition 3 128
>>>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>>>> [    2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>>> [    2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>>> [    2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>>> [    2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>>> [    2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>>> [    2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>>> [    2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>>> [    2.159402]  mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>>> [    6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>>>> supported     <<<=====
>>>>>>>>>>>>>>>>>>>>>> [    6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>>>> [    6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>>>> [    6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>>>  drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>>>  1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>>>  #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>>>  #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>>> +    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>  struct meson_host {
>>>>>>>>>>>>>>>>>>>>>      struct    device        *dev;
>>>>>>>>>>>>>>>>>>>>>      struct    mmc_host    *mmc;
>>>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>>>      struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>>>      struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>>>> -    void *bounce_buf;
>>>>>>>>>>>>>>>>>>>>> -    dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>>>> +    dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_data;
>>>>>>>>>>>>>>>>>>>>> -    u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>>>  #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>>> +    return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (!data)
>>>>>>>>>>>>>>>>>>>>> +        return;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    data->host_cookie = true;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>>>> +                    meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>>> +    if (!data->sg_count)
>>>>>>>>>>>>>>>>>>>>> +        dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>>>> +                   int err)
>>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>>>> +        dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>>> +                 meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>>> -    struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>>>> -    u32 cfg;
>>>>>>>>>>>>>>>>>>>>> -    u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>>>> +    struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>>>> +    struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>>>> +    u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>>>> +    u8 blk_len;
>>>>>>>>>>>>>>>>>>>>> +    int i;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>>>      dma_rmb();
>>>>>>>>>>>>>>>>>>>>> -    desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>>>> -    memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK)    <<
>>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>>>> +           CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +    cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      /* Response */
>>>>>>>>>>>>>>>>>>>>>      if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>          if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>          if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    /* data? */
>>>>>>>>>>>>>>>>>>>>> -    if (cmd->data) {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +    if (data) {
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +        if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>              /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>>>              cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>>              blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>>              blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>>> -            if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>>>> -                dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>>>> -                    __func__, blk_len,
>>>>>>>>>>>>>>>>>>>>> -                    ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>>>> -                blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>>>> +            if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>>>> +                dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>>>> +                    "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>>>> +                    __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>>>> +                blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>>>                  cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>>>                  cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>>>                  writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>>>              }
>>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>>> -                (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>>> -                CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>>          }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -        cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>>>> -        if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>> -            WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>>> -            sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>>>> -                      host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>>> -            cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>>> -            dma_wmb();
>>>>>>>>>>>>>>>>>>>>> -        } else {
>>>>>>>>>>>>>>>>>>>>> -            desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>> -        }
>>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>>> +        if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>>>> +               CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +        for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>>>> +            unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +            if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>>>> +                len /= data->blksz;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>>> +                       CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +            if (i > 0)
>>>>>>>>>>>>>>>>>>>>> +                desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>>> +            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>>>> +        }
>>>>>>>>>>>>>>>>>>>>> +        desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>>>      } else {
>>>>>>>>>>>>>>>>>>>>> -        desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>>> -        cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>> +        cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>>> +        desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>>>> -        CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    /* Last descriptor */
>>>>>>>>>>>>>>>>>>>>> -    desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>>>> -    writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>>>> +    cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>>>> +    writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>>> +    bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>>> +        meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      /* Stop execution */
>>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>>>      else
>>>>>>>>>>>>>>>>>>>>>          meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>>> +        meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>  static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>>      struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>>>> +    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>>>      u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>>>      irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> +    data = cmd->data;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>      spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>>>      irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>>>          cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>>>> +        data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>>      if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>>>> -        ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>>> -    else  {
>>>>>>>>>>>>>>>>>>>>> +    if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>>>> +        if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>>>> +            ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>>> +    } else  {
>>>>>>>>>>>>>>>>>>>>>          dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>>>               status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>>>               cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>>>  {
>>>>>>>>>>>>>>>>>>>>>      struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>>>      struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>>>> -    struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>>> -    unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>>>          return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    data = cmd->data;
>>>>>>>>>>>>>>>>>>>>> -    if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>>>> -        xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>>> -        WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>>> -        sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>>> -                    host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>>> -        data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>>> -    }
>>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>>>      next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>>>> -    if (next_cmd)
>>>>>>>>>>>>>>>>>>>>> -        meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>>> -    else
>>>>>>>>>>>>>>>>>>>>> -        meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>>>> +    meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>>  }
>>>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>>>      .request    = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>>>      .set_ios    = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>>>      .get_cd         = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>>>> +    .pre_req    = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>>>> +    .post_req    = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>>>  };
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>  static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>>>      mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>>>> -    mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>>> -    /* data bounce buffer */
>>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>>>> -    host->bounce_buf =
>>>>>>>>>>>>>>>>>>>>> -        dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>>> -                   &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>>> -    if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>>>> -        dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>>>> +    mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>>>> +    mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>>> +    mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>>> +    host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>>>> +                     &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>>> +    if (!host->descs) {
>>>>>>>>>>>>>>>>>>>>> +        dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>>>          ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>>>          goto err_div_clk;
>>>>>>>>>>>>>>>>>>>>>      }
>>>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>>      /* disable interrupts */
>>>>>>>>>>>>>>>>>>>>>      writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> -    dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>>> -              host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>>>> +    dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>>>> +              host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>>>      clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>>>  dmesg -n 8
>>>>>>>>>>>>>>>>>>  dmesg -D
>>>>>>>>>>>>>>>>>>  logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>>>  modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>>  logger "loading brcmfmac"
>>>>>>>>>>>>>>>>>>  modprobe brcmfmac
>>>>>>>>>>>>>>>>>>  logger "modules loaded"
>>>>>>>>>>>>>>>>>>  sleep 1
>>>>>>>>>>>>>>>>>>  cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>>>  cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>>>  Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>>>   [   47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>   [   47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>>>   [   47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>>   [   47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>>   [   47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>>   [   47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>>   [   48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>>   [   48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>>   [   48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>>   [   48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>>   [   48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>>   [   48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>>   [   48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>>   [   48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>>   [   48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>>   [   48.731866] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>>   [   48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731881] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>>   [   48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>>> data:0x00000000             <<<<===== wrong!
>>>>>>>>>>>>>>>>>>   [   48.731890] brcmfmac: F1 signature read @0x18000000=0x   0
>>>>>>>>>>>>>>>>>>   [   48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>>>   [   48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>>>   [   48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>>>   [   48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>>   [   48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>>   [   48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>>   [   48.732214] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>>   [   48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.732235] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>>   [   48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>>>   [   48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>>>   [   48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>>>   [   48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>   [   48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>   [   48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>>>   [   48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>>>   [   48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>>>   [   48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>>>   [   48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>>>   [   48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>>>   [   48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>>   [   48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>>   [   48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>>>   [   52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>   [   52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>>>   [   52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>>>   [   52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>>>   [   52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>>>   loading brcmfmac
>>>>>>>>>>>>>>>>>>   [   53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>>>   [   53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>>>   [   53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>>>   [   53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>>>   [   53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>>>   [   53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>>>   [   53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>>>   [   53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>>>   [   53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>>>   [   53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>>>   [   53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>>>   [   53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>>>   [   53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>>>   [   53.796810] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>>>   [   53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796829] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>>>>   [   53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>>> data:0x16044330               <<<<<====== ok
>>>>>>>>>>>>>>>>>>   [   53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>>>   [   53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>>>   [   53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>   [   53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>>>   [   53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>>>   [   53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>>>   [   53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>>>   [   53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>>>> +                dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> +    if (cmd->opcode == 53)
>>>>>>>>>>>>>>>>> +        dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>>>> [  107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>> [  107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>> [  107.510516] mmc0:     blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>>>> [  107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>>>> [  107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>>>> [  107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>>> [  107.510541] mmc0:     4 bytes transferred: 0
>>>>>>>>>>>>>>>> [  107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>>>> this one?
>>>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>          for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>              unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +            if (cmd->opcode == 53)
>>>>>>>>>>>>>>> +                pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>              if (data->blocks > 1)
>>>>>>>>>>>>>>>                  len /= data->blksz;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>      meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> +    if (cmd->opcode == 53) {
>>>>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>>>>> +        pr_info("cmd 53 cmd_data0:  %08x\n",
>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>> +    }
>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>      cmd->error = 0;
>>>>>>>>>>>>>>>      if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>          dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>>>> [   37.113577] sg: idx 0 len 4
>>>>>>>>>>>>>> [   37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>>> [   37.114016] sg: idx 0 len 4
>>>>>>>>>>>>>> [   37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0:  72091ab4
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>>>
>>>>>>>>>>>>> here are the patches
>>>>>>>>>>>>>
>>>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>>>
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-18
>>>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>
>>>>>>>>>>>>>      /* data? */
>>>>>>>>>>>>>      if (cmd->data) {
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>>> +
>>>>>>>>>>>>>          desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>          if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>              desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>      writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>      writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>>> +        desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>>
>>>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>>
>>>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>>>
>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c    2017-03-20
>>>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>      }
>>>>>>>>>>>>>
>>>>>>>>>>>>>      if (data) {
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +        dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>>> +
>>>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>
>>>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>>      host->cmd = cmd;
>>>>>>>>>>>>>
>>>>>>>>>>>>>      wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>> +
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>>> +        desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>      writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>  }
>>>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>>>      raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>      status = raw_status & irq_en;
>>>>>>>>>>>>>
>>>>>>>>>>>>> +    dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>>> +
>>>>>>>>>>>>>      if (!status) {
>>>>>>>>>>>>>          dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>>>               raw_status, irq_en);
>>>>>>>>>>>>>
>>>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>>>> be a bug
>>>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>>>> very small
>>>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>>>> that level:
>>>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>>>> small
>>>>>>>>>>>> transfers.
>>>>>>>>>>>>
>>>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>>>
>>>>>>>>>>>> Could you please apply:
>>>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>>>> following:
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>          return NULL;
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>>>> +{
>>>>>>>>>>>> +    return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>>>> +           data->flags & MMC_DATA_READ;
>>>>>>>>>>>> +}
>>>>>>>>>>>> +
>>>>>>>>>>>>  static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>  {
>>>>>>>>>>>>      return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>  static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>                     int err)
>>>>>>>>>>>>  {
>>>>>>>>>>>> +    struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>      struct mmc_data *data = mrq->data;
>>>>>>>>>>>>
>>>>>>>>>>>>      if (data && data->sg_count)
>>>>>>>>>>>>          dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>                   meson_mmc_get_data_dir(data));
>>>>>>>>>>>> +
>>>>>>>>>>>> +    if (meson_mmc_small_read(data)) {
>>>>>>>>>>>> +        int cnt;
>>>>>>>>>>>> +
>>>>>>>>>>>> +        dma_rmb();
>>>>>>>>>>>> +        cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>> +                &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>>>> +        if (cnt != data->blksz)
>>>>>>>>>>>> +            dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>>>> +    }
>>>>>>>>>>>>  }
>>>>>>>>>>>>
>>>>>>>>>>>>  static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>>>> clk_rate)
>>>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>      }
>>>>>>>>>>>>
>>>>>>>>>>>>      if (data) {
>>>>>>>>>>>> +        bool small_read = meson_mmc_small_read(data);
>>>>>>>>>>>> +
>>>>>>>>>>>>          cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>
>>>>>>>>>>>>          if (data->blocks > 1) {
>>>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>              }
>>>>>>>>>>>>          }
>>>>>>>>>>>>
>>>>>>>>>>>> +        /*
>>>>>>>>>>>> +         * workaround for most likely hw bug
>>>>>>>>>>>> +         * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>>>> +         * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>>>> +        */
>>>>>>>>>>>> +        if (small_read)
>>>>>>>>>>>> +            cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>>>> +
>>>>>>>>>>>>          data->bytes_xfered = 0;
>>>>>>>>>>>>          if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>              cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>                  desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>              desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>              desc[i].cmd_resp = 0;
>>>>>>>>>>>> -            desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>> +            desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>>>          }
>>>>>>>>>>>>          desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>
>>>>>>>>>>> here is  the result:
>>>>>>>>>>> [   44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>> [   44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>> [   44.375037] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>>> nsac 0
>>>>>>>>>>> [   44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> [   44.375050] mmc0:     4 bytes transferred: 0
>>>>>>>>>>> [   44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>>>> [   44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>>>
>>>>>>>>>>> [   44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>> [   44.375299] mmc0:     blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>>> nsac 0
>>>>>>>>>>> [   44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>>> 00000000
>>>>>>>>>>> [   44.375311] mmc0:     4 bytes transferred: 0
>>>>>>>>>>> [   44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000      <<<
>>>>>>>>>>> expected 0x16044330
>>>>>>>>>>> [   44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>>>> rev=0
>>>>>>>>>>> [   44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>> supported
>>>>>>>>>>> [   44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>>>> failed!
>>>>>>>>>>> [   44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>>>> failed
>>>>>>>>>>> [   44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>
>>>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>>>> in the 1. cmd53)
>>>>>>>>>>>
>>>>>>>>>>> Helmut
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Hallo Helmut,
>>>>>>>>>>
>>>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>>>> regarding a not
>>>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>>>> for 64 bit DMA).
>>>>>>>>>>
>>>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>>>> latest next kernel.
>>>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>>>> but are not applied yet
>>>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>>>
>>>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>>>> version from March 10th.
>>>>>>>>>>
>>>>>>>>>> Thanks in advance,
>>>>>>>>>> Heiner
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Heiner,
>>>>>>>>>
>>>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>>>
>>>>>>>>> and
>>>>>>>>>
>>>>>>>>> i think, you did it!
>>>>>>>>>
>>>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>>>
>>>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>>>
>>>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>>>> without having loaded
>>>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>>>> so i cannot do any further tests.
>>>>>>>>>
>>>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>>>
>>>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>>>> linux-next. But failed to compile it
>>>>>>>>>
>>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c: In function ?meson_mmc_pre_req?:
>>>>>>>>>   drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>>>> function ?mmc_get_dma_dir? [-Werror=implicit-function-declaration]
>>>>>>>>>          mmc_get_dma_dir(data));
>>>>>>>>>          ^
>>>>>>>>>   ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>>>> ?dma_map_sg?
>>>>>>>>>    #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>>>
>>>>>>>>> Helmut
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>>>
>>>>>>>> tcp with the ethernet adpater is ok.
>>>>>>>>
>>>>>>>> but with the wlan i get warnings
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461505] sp : ffffffc01027b920
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461560] Call trace:
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461566] b740:                 0000000000000000 0000008000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>>>> Nov  3 18:18:51 localhost kernel: [  134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>>>
>>>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Helmut,
>>>>>>>
>>>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>>>> before the WARN_ON trace.
>>>>>>>
>>>>>>> Thanks, Heiner
>>>>>>>
>>>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>>>> index d40744bb..15cf9820 100644
>>>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>>>> @@ -14,6 +14,7 @@
>>>>>>>  #include <linux/mmc/card.h>
>>>>>>>  #include <linux/mmc/sdio.h>
>>>>>>>  #include <linux/mmc/sdio_func.h>
>>>>>>> +#include <linux/mm.h>
>>>>>>>
>>>>>>>  #include "sdio_ops.h"
>>>>>>>  #include "core.h"
>>>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>>      unsigned remainder = size;
>>>>>>>      unsigned max_blocks;
>>>>>>>      int ret;
>>>>>>> +    void *buf_orig = buf;
>>>>>>> +    unsigned size_orig = size;
>>>>>>>
>>>>>>>      if (!func || (func->num > 7))
>>>>>>>          return -EINVAL;
>>>>>>>
>>>>>>> +    if (is_vmalloc_addr(buf))
>>>>>>> +        pr_err("sdio: buffer is vmalloc memory\n");
>>>>>>> +
>>>>>>> +    if (((unsigned long)buf) & 7)
>>>>>>> +        pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>>>> +
>>>>>>>      /* Do the bulk of the transfer using block mode (if supported). */
>>>>>>>      if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>>>          /* Blocks per command is limited by host count, host transfer
>>>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>>                  blocks = max_blocks;
>>>>>>>              size = blocks * func->cur_blksize;
>>>>>>>
>>>>>>> +            if (((unsigned long)buf) & 7)
>>>>>>> +                pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>>>> +                       buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>>>> +
>>>>>>>              ret = mmc_io_rw_extended(func->card, write,
>>>>>>>                  func->num, addr, incr_addr, buf,
>>>>>>>                  blocks, func->cur_blksize);
>>>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>>>      while (remainder > 0) {
>>>>>>>          size = min(remainder, sdio_max_byte_size(func));
>>>>>>>
>>>>>>> +        if (((unsigned long)buf) & 7)
>>>>>>> +            pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>>>> +                   buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>>>> +
>>>>>>>          /* Indicate byte mode by setting "blocks" = 0 */
>>>>>>>          ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>>>               incr_addr, buf, 0, size);
>>>>>>>
>>>>>>
>>>>>> Hallo Heiner,
>>>>>>
>>>>>> this is the ouput
>>>>>> [   58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>>>> [   58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>>> [   58.519115] ------------[ cut here ]------------
>>>>>> [   58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [   58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>> [   58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>>> [   58.519154] Hardware name: Netxeon MiniMX (DT)
>>>>>> [   58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> [   58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> [   58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [   58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>>>> [   58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>>> [   58.519283] sp : ffffffc01027b910
>>>>>> [   58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>>>> [   58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>>>> [   58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>>>> [   58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> [   58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>>>> [   58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>>>> [   58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>>>> [   58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>>>> [   58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>>>> [   58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>>>> [   58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>>> [   58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> [   58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> [   58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>>> [   58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>>>> [   58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>>>> [   58.519366] Call trace:
>>>>>> [   58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>>> [   58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>>> [   58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>>>> [   58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>>> [   58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>>>> [   58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>>> [   58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>>> [   58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>>> [   58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>>>> [   58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>>>> [   58.519401] b860: 0000000000000000 0000000000000000
>>>>>> [   58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [   58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>>> [   58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> [   58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> [   58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> [   58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> [   58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>>> [   58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>>> [   58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> [   58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> [   58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> [   58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> [   58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> [   58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> [   58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>> [   59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>>>> [   59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>>>
>>>>>>
>>>>>> [  242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>>>> [  242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>>> [  242.586996] ------------[ cut here ]------------
>>>>>> [  242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [  242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>>>> [  242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>>> [  242.587036] Hardware name: Netxeon MiniMX (DT)
>>>>>> [  242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>> [  242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>> [  242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [  242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>>>> [  242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>>> [  242.587166] sp : ffffffc01027b910
>>>>>> [  242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>>>> [  242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>>>> [  242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>>>> [  242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>> [  242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>>>> [  242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>>>> [  242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>>>> [  242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>>>> [  242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>>>> [  242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>>>> [  242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>>> [  242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>> [  242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>> [  242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>>> [  242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>> [  242.587246] ---[ end trace 7831fd15034513ca ]---
>>>>>> [  242.587249] Call trace:
>>>>>> [  242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>>> [  242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>>> [  242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>>>> [  242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>>> [  242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>>>> [  242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>>> [  242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>>> [  242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>>> [  242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>>>> [  242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>>>> [  242.587293] b860: 0000000000000000 0000000000000000
>>>>>> [  242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>> [  242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>>> [  242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>> [  242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>> [  242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>> [  242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>> [  242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>>> [  242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>>> [  242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>> [  242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>> [  242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>> [  242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>> [  242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>> [  242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>> [  242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>> [  243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>>>> [  243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>>>
>>>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>>>
>>>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>>>
>>>>>> Helmut
>>>>>>
>>>>>>
>>>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>>>> to be DMA-safe.
>>>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>>>> and / or MMC controller drivers.
>>>>>
>>>>> Heiner
>>>>>
>>>>>
>>>> Hallo Heiner,
>>>>
>>>> i found a solution:
>>>>
>>>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>> index a999f95062c7..b966217f3a6c 100644
>>>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>>>  /* Limit on rounding up frames */
>>>>  static const uint max_roundup = 512;
>>>>
>>>> -#define ALIGNMENT  4
>>>> +#define ALIGNMENT  8
>>>>
>>>>  enum brcmf_sdio_frmtype {
>>>>         BRCMF_SDIO_FT_NORMAL,
>>>
>>> Hi Heiner,
>>>
>>> Isn't a way to use the old behaviour with a badly aligned buffer ?
>>>
>>> Neil
>>>
>>>
>>
>> "a solution" was a bad expression.
>>
>> with my mail i wanted to show, that
>> - Heiners drivers is, when receiving correctly aligned buffers, perfectly operational
>> - the performance isn't better than that of the amlogic driver, which uses, as much as i can see, a bounce buffer for sdio
>>
> In the case of SDIO I would assume that usually the device is the limiting factor, not the controller driver.
> For eMMC this may be different.
> 
>> and what was surprising for me:
>> - the code for the buffer aligment inside of brcmfmac uses a locally defined value. isn't there a global definition for this??
>> - handling for buffer alignment seems IMHO inconsistent in the kernel
>>
> This is my impression too. There's not really a consistent way to say in an API: This pointer must not reference
> non-DMA'able memory. AFAIK not even a weak option similar to the __iomem annotation is available.
> 
>> Helmut
>>
> 


You can try to fix all the SDIO upstream drivers, but you will need to support
such unaligned buffer because you have a lot on uncontrollable off-tree sdio driver
like the broadcom or the realtek ones.

And comparing amlogic kernel and in-kernel sdio driver is nonsense because the amlogic
kernel uses off-tree optimized drivers.

Don't care about the efficiency, provide the old mechanism for non-aligned buffers because
it's out of your scope here.

Neil