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* Loongson 2F IDE/ATA broken with lemote2f_defconfig
@ 2019-01-06 12:46 Aaro Koskinen
  2019-01-12 15:26 ` Aaro Koskinen
  0 siblings, 1 reply; 6+ messages in thread
From: Aaro Koskinen @ 2019-01-06 12:46 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz, Jens Axboe, linux-ide, linux-mips

Hi,

Commit 7ff7a5b1bfff ("MIPS: lemote2f_defconfig: Convert to use libata
PATA drivers") switched from IDE to libata PATA on Loongson 2F, but
neither PATA_AMD or PATA_CS5536 work well on this platform compared
to the AMD74XX IDE driver.

During the ATA init/probe there is interrupt storm from irq 14, and
majority of system boots end up with "nobody cared... IRQ disabled".
So the result is a very slow disk access.

It seems that the interrupt gets crazy after the port freeze done early
during the init, and for whatever reason it cannot be cleared.

With the below workaround I was able to boot the system normally. I
guess that rather than going back to old IDE driver, we should just try
to make pata_cs5536 work (and forget PATA AMD on this board)...?

A.

...

diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c
index dc1255294628..71e485547ee8 100644
--- a/drivers/ata/pata_cs5536.c
+++ b/drivers/ata/pata_cs5536.c
@@ -229,6 +229,16 @@ static void cs5536_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 	cs5536_write(pdev, ETC, etc);
 }
 
+static void cs5536_noop_freeze(struct ata_port *ap)
+{
+	/*
+	 * Some CS5536 controllers result in a screaming interrupt if ATA_NIEN
+	 * is manipulated. Leave it alone and just clear pending IRQ.
+	 */
+	ap->ops->sff_check_status(ap);
+	ata_bmdma_irq_clear(ap);
+}
+
 static struct scsi_host_template cs5536_sht = {
 	ATA_BMDMA_SHT(DRV_NAME),
 };
@@ -238,6 +248,7 @@ static struct ata_port_operations cs5536_port_ops = {
 	.cable_detect		= cs5536_cable_detect,
 	.set_piomode		= cs5536_set_piomode,
 	.set_dmamode		= cs5536_set_dmamode,
+	.freeze			= cs5536_noop_freeze,
 };
 
 /**

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: Loongson 2F IDE/ATA broken with lemote2f_defconfig
  2019-01-06 12:46 Loongson 2F IDE/ATA broken with lemote2f_defconfig Aaro Koskinen
@ 2019-01-12 15:26 ` Aaro Koskinen
  2019-01-14 13:16   ` Bartlomiej Zolnierkiewicz
  0 siblings, 1 reply; 6+ messages in thread
From: Aaro Koskinen @ 2019-01-12 15:26 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz, Jens Axboe, linux-ide, linux-mips

Hi,

On Sun, Jan 06, 2019 at 02:46:07PM +0200, Aaro Koskinen wrote:
> Commit 7ff7a5b1bfff ("MIPS: lemote2f_defconfig: Convert to use libata
> PATA drivers") switched from IDE to libata PATA on Loongson 2F, but
> neither PATA_AMD or PATA_CS5536 work well on this platform compared
> to the AMD74XX IDE driver.
> 
> During the ATA init/probe there is interrupt storm from irq 14, and
> majority of system boots end up with "nobody cared... IRQ disabled".
> So the result is a very slow disk access.
> 
> It seems that the interrupt gets crazy after the port freeze done early
> during the init, and for whatever reason it cannot be cleared.
> 
> With the below workaround I was able to boot the system normally. I
> guess that rather than going back to old IDE driver, we should just try
> to make pata_cs5536 work (and forget PATA AMD on this board)...?

Hmm, even with this hack I get ~500 spurious IRQs during the boot.

Also compared to old IDE, there's 33 vs 100 speed difference:

[    3.324000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
[    3.584000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
[    3.588000] ata1.00: 312581808 sectors, multi 16: LBA48
[    3.592000] ata1.00: limited to UDMA/33 due to 40-wire cable

[    4.540000] Probing IDE interface ide0...
[    4.992000] hda: WDC WD1600BEVS-00VAT0, ATA DISK drive
[    5.716000] hda: host max PIO5 wanted PIO255(auto-tune) selected PIO4
[    5.716000] hda: UDMA/100 mode selected

A.

> diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c
> index dc1255294628..71e485547ee8 100644
> --- a/drivers/ata/pata_cs5536.c
> +++ b/drivers/ata/pata_cs5536.c
> @@ -229,6 +229,16 @@ static void cs5536_set_dmamode(struct ata_port *ap, struct ata_device *adev)
>  	cs5536_write(pdev, ETC, etc);
>  }
>  
> +static void cs5536_noop_freeze(struct ata_port *ap)
> +{
> +	/*
> +	 * Some CS5536 controllers result in a screaming interrupt if ATA_NIEN
> +	 * is manipulated. Leave it alone and just clear pending IRQ.
> +	 */
> +	ap->ops->sff_check_status(ap);
> +	ata_bmdma_irq_clear(ap);
> +}
> +
>  static struct scsi_host_template cs5536_sht = {
>  	ATA_BMDMA_SHT(DRV_NAME),
>  };
> @@ -238,6 +248,7 @@ static struct ata_port_operations cs5536_port_ops = {
>  	.cable_detect		= cs5536_cable_detect,
>  	.set_piomode		= cs5536_set_piomode,
>  	.set_dmamode		= cs5536_set_dmamode,
> +	.freeze			= cs5536_noop_freeze,
>  };
>  
>  /**

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: Loongson 2F IDE/ATA broken with lemote2f_defconfig
  2019-01-12 15:26 ` Aaro Koskinen
@ 2019-01-14 13:16   ` Bartlomiej Zolnierkiewicz
  2019-01-26 18:43     ` Aaro Koskinen
  0 siblings, 1 reply; 6+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2019-01-14 13:16 UTC (permalink / raw)
  To: Aaro Koskinen, linux-mips; +Cc: Jens Axboe, linux-ide


Hi,

On 01/12/2019 04:26 PM, Aaro Koskinen wrote:
> Hi,
> 
> On Sun, Jan 06, 2019 at 02:46:07PM +0200, Aaro Koskinen wrote:
>> Commit 7ff7a5b1bfff ("MIPS: lemote2f_defconfig: Convert to use libata
>> PATA drivers") switched from IDE to libata PATA on Loongson 2F, but
>> neither PATA_AMD or PATA_CS5536 work well on this platform compared
>> to the AMD74XX IDE driver.

Sorry about that.

>> During the ATA init/probe there is interrupt storm from irq 14, and
>> majority of system boots end up with "nobody cared... IRQ disabled".
>> So the result is a very slow disk access.
>>
>> It seems that the interrupt gets crazy after the port freeze done early
>> during the init, and for whatever reason it cannot be cleared.
>>
>> With the below workaround I was able to boot the system normally. I
>> guess that rather than going back to old IDE driver, we should just try
>> to make pata_cs5536 work (and forget PATA AMD on this board)...?
> 
> Hmm, even with this hack I get ~500 spurious IRQs during the boot.
> 
> Also compared to old IDE, there's 33 vs 100 speed difference:
> 
> [    3.324000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
> [    3.584000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
> [    3.588000] ata1.00: 312581808 sectors, multi 16: LBA48
> [    3.592000] ata1.00: limited to UDMA/33 due to 40-wire cable
> 
> [    4.540000] Probing IDE interface ide0...
> [    4.992000] hda: WDC WD1600BEVS-00VAT0, ATA DISK drive
> [    5.716000] hda: host max PIO5 wanted PIO255(auto-tune) selected PIO4
> [    5.716000] hda: UDMA/100 mode selected

Can you try booting with "libata.force=1:80c" (and if that doesn't work with
"libata.force=1:short40c") and also provide full dmesg-s for working (ide) and
not working (libata) kernels.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: Loongson 2F IDE/ATA broken with lemote2f_defconfig
  2019-01-14 13:16   ` Bartlomiej Zolnierkiewicz
@ 2019-01-26 18:43     ` Aaro Koskinen
  2019-02-07 15:02       ` Bartlomiej Zolnierkiewicz
  0 siblings, 1 reply; 6+ messages in thread
From: Aaro Koskinen @ 2019-01-26 18:43 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz; +Cc: linux-mips, Jens Axboe, linux-ide

Hi,

On Mon, Jan 14, 2019 at 02:16:42PM +0100, Bartlomiej Zolnierkiewicz wrote:
> On 01/12/2019 04:26 PM, Aaro Koskinen wrote:
> > Hi,
> > 
> > On Sun, Jan 06, 2019 at 02:46:07PM +0200, Aaro Koskinen wrote:
> >> Commit 7ff7a5b1bfff ("MIPS: lemote2f_defconfig: Convert to use libata
> >> PATA drivers") switched from IDE to libata PATA on Loongson 2F, but
> >> neither PATA_AMD or PATA_CS5536 work well on this platform compared
> >> to the AMD74XX IDE driver.
> 
> Sorry about that.
> 
> >> During the ATA init/probe there is interrupt storm from irq 14, and
> >> majority of system boots end up with "nobody cared... IRQ disabled".
> >> So the result is a very slow disk access.
> >>
> >> It seems that the interrupt gets crazy after the port freeze done early
> >> during the init, and for whatever reason it cannot be cleared.
> >>
> >> With the below workaround I was able to boot the system normally. I
> >> guess that rather than going back to old IDE driver, we should just try
> >> to make pata_cs5536 work (and forget PATA AMD on this board)...?
> > 
> > Hmm, even with this hack I get ~500 spurious IRQs during the boot.
> > 
> > Also compared to old IDE, there's 33 vs 100 speed difference:
> > 
> > [    3.324000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
> > [    3.584000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
> > [    3.588000] ata1.00: 312581808 sectors, multi 16: LBA48
> > [    3.592000] ata1.00: limited to UDMA/33 due to 40-wire cable
> > 
> > [    4.540000] Probing IDE interface ide0...
> > [    4.992000] hda: WDC WD1600BEVS-00VAT0, ATA DISK drive
> > [    5.716000] hda: host max PIO5 wanted PIO255(auto-tune) selected PIO4
> > [    5.716000] hda: UDMA/100 mode selected
> 
> Can you try booting with "libata.force=1:80c" (and if that doesn't work with
> "libata.force=1:short40c")

(Sorry for delay, this machine is in use so I couldn't reboot it randomly...)

OK, the speed issue can be fixed with command line. So "libata.force=1:80c"
works with cs5536 libata driver.

> and also provide full dmesg-s for working (ide) and not working
> (libata) kernels.

Logs are below:

1) working IDE (no spurious IRQs)
2) working PATA AMD (around ~90k spurious IRQs, so it's just a matter of luck)
3) failing PATA AMD (100k spurious IRQs reached)
4) working PATA CS5536 (same as with PATA AMD)
5) failing PATA CS5536 (same as with PATA AMD)

-----

1) Working IDE with amd74xx.

[    0.000000] Linux version 4.20.0-lemote-los_919f1 (aaro@amd-fx-6350) (gcc version 7.4.0 (GCC)) #1 Sat Jan 26 17:11:52 EET 2019
[    0.000000] memsize=256, highmemsize=256
[    0.000000] CpuClock = 797780000
[    0.000000] printk: bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 00006303 (ICT Loongson-2)
[    0.000000] FPU revision is: 00000501
[    0.000000] Checking for the multiply/shift bug... no.
[    0.000000] Checking for the daddiu bug... no.
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 0000000010000000 @ 0000000000000000 (usable)
[    0.000000]  memory: 0000000030000000 @ 0000000010000000 (reserved)
[    0.000000]  memory: 0000000010000000 @ 0000000090000000 (usable)
[    0.000000]  memory: 0000000010000000 @ 0000000080000000 (reserved)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Primary instruction cache 64kB, VIPT, direct mapped, linesize 32 bytes.
[    0.000000] Primary data cache 64kB, 4-way, VIPT, no aliases, linesize 32 bytes
[    0.000000] Unified secondary cache 512kB 4-way, linesize 32 bytes.
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000003fffffff]
[    0.000000]   node   0: [mem 0x0000000080000000-0x000000009fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] On node 0 totalpages: 98304
[    0.000000]   Normal zone: 336 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 98304 pages, LIFO batch:15
[    0.000000] random: get_random_bytes called from start_kernel+0xa0/0x580 with crng_init=0
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 97968
[    0.000000] Kernel command line: console=tty console=ttyS0,115200
[    0.000000] Dentry cache hash table entries: 262144 (order: 7, 2097152 bytes)
[    0.000000] Inode-cache hash table entries: 131072 (order: 6, 1048576 bytes)
[    0.000000] Memory: 491728K/1572864K available (4731K kernel code, 475K rwdata, 856K rodata, 2048K init, 16616K bss, 1081136K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 128
[    0.000000] Console: colour dummy device 80x25
[    0.000000] printk: console [tty0] enabled
[    0.000000] sched_clock: 64 bits at 250 Hz, resolution 4000000ns, wraps every 9007199254000000ns
[    0.004000] Calibrating delay loop... 528.38 BogoMIPS (lpj=1056768)
[    0.040000] pid_max: default: 32768 minimum: 301
[    0.044000] Mount-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.048000] Mountpoint-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.052000] Checking for the daddi bug... no.
[    0.060000] devtmpfs: initialized
[    0.064000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.068000] futex hash table entries: 256 (order: -2, 6144 bytes)
[    0.072000] NET: Registered protocol family 16
[    0.076000] clocksource: mfgpt: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133486551712 ns
[    0.120000] SCSI subsystem initialized
[    0.124000] usbcore: registered new interface driver usbfs
[    0.128000] usbcore: registered new interface driver hub
[    0.132000] usbcore: registered new device driver usb
[    0.140000] PCI host bridge to bus 0000:00
[    0.144000] pci_bus 0000:00: root bus resource [mem 0x40000000-0x7fffffff]
[    0.148000] pci_bus 0000:00: root bus resource [io  0x4000-0xffff]
[    0.152000] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[    0.156000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[    0.160000] pci 0000:00:06.0: [10ec:8169] type 00 class 0x020000
[    0.160000] pci 0000:00:06.0: reg 0x10: [io  0xb100-0xb1ff]
[    0.160000] pci 0000:00:06.0: reg 0x14: [mem 0x04075000-0x040750ff]
[    0.160000] pci 0000:00:06.0: reg 0x30: [mem 0x04040000-0x0405ffff pref]
[    0.160000] pci 0000:00:06.0: supports D1 D2
[    0.160000] pci 0000:00:06.0: PME# supported from D1 D2 D3hot
[    0.160000] pci 0000:00:08.0: [1039:0325] type 00 class 0x030000
[    0.160000] pci 0000:00:08.0: reg 0x10: [mem 0x40000000-0x4fffffff pref]
[    0.160000] pci 0000:00:08.0: reg 0x14: [mem 0x04000000-0x0403ffff]
[    0.160000] pci 0000:00:08.0: reg 0x18: [io  0xb300-0xb37f]
[    0.160000] pci 0000:00:08.0: reg 0x30: [mem 0x04060000-0x0406ffff pref]
[    0.160000] pci 0000:00:08.0: supports D1 D2
[    0.160000] pci 0000:00:0e.0: [1022:2090] type 00 class 0x060100
[    0.160000] pci 0000:00:0e.0: reg 0x10: [io  0xb410-0xb417]
[    0.160000] pci 0000:00:0e.0: reg 0x14: [io  0xb000-0xb0ff]
[    0.160000] pci 0000:00:0e.0: reg 0x18: [io  0xb380-0xb3bf]
[    0.160000] pci 0000:00:0e.0: reg 0x20: [io  0xb280-0xb2ff]
[    0.160000] pci 0000:00:0e.0: reg 0x24: [io  0xb3c0-0xb3df]
[    0.160000] pci 0000:00:0e.2: [1022:209a] type 00 class 0x010180
[    0.160000] pci 0000:00:0e.2: reg 0x20: [io  0xb400-0xb40f]
[    0.160000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.164000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.168000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.172000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.176000] pci 0000:00:0e.3: [1022:2093] type 00 class 0x040100
[    0.176000] pci 0000:00:0e.3: reg 0x10: [io  0xb200-0xb27f]
[    0.176000] pci 0000:00:0e.4: [1022:2094] type 00 class 0x0c0310
[    0.176000] pci 0000:00:0e.4: reg 0x10: [mem 0x04074000-0x04074fff]
[    0.180000] pci 0000:00:0e.5: [1022:2095] type 00 class 0x0c0320
[    0.180000] pci 0000:00:0e.5: reg 0x10: [mem 0x04073000-0x04073fff]
[    0.180000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    0.180000] pci 0000:00:08.0: BAR 0: assigned [mem 0x40000000-0x4fffffff pref]
[    0.184000] pci 0000:00:08.0: BAR 1: assigned [mem 0x50000000-0x5003ffff]
[    0.188000] pci 0000:00:06.0: BAR 6: assigned [mem 0x50040000-0x5005ffff pref]
[    0.192000] pci 0000:00:08.0: BAR 6: assigned [mem 0x50060000-0x5006ffff pref]
[    0.196000] pci 0000:00:0e.4: BAR 0: assigned [mem 0x50070000-0x50070fff]
[    0.200000] pci 0000:00:0e.5: BAR 0: assigned [mem 0x50071000-0x50071fff]
[    0.204000] pci 0000:00:06.0: BAR 0: assigned [io  0x4000-0x40ff]
[    0.208000] pci 0000:00:06.0: BAR 1: assigned [mem 0x50072000-0x500720ff]
[    0.212000] pci 0000:00:0e.0: BAR 1: assigned [io  0x4400-0x44ff]
[    0.216000] pci 0000:00:08.0: BAR 2: assigned [io  0x4800-0x487f]
[    0.220000] pci 0000:00:0e.0: BAR 4: assigned [io  0x4880-0x48ff]
[    0.224000] pci 0000:00:0e.3: BAR 0: assigned [io  0x4c00-0x4c7f]
[    0.228000] pci 0000:00:0e.0: BAR 2: assigned [io  0x4c80-0x4cbf]
[    0.232000] pci 0000:00:0e.0: BAR 5: assigned [io  0x4cc0-0x4cdf]
[    0.236000] pci 0000:00:0e.2: BAR 4: assigned [io  0x4ce0-0x4cef]
[    0.240000] pci 0000:00:0e.0: BAR 0: assigned [io  0x4cf0-0x4cf7]
[    0.248000] clocksource: Switched to clocksource mfgpt
[    0.276000] NET: Registered protocol family 2
[    0.280000] tcp_listen_portaddr_hash hash table entries: 1024 (order: 0, 16384 bytes)
[    0.284000] TCP established hash table entries: 16384 (order: 3, 131072 bytes)
[    0.288000] TCP bind hash table entries: 16384 (order: 3, 131072 bytes)
[    0.292000] TCP: Hash tables configured (established 16384 bind 16384)
[    0.296000] UDP hash table entries: 1024 (order: 1, 32768 bytes)
[    0.300000] UDP-Lite hash table entries: 1024 (order: 1, 32768 bytes)
[    0.304000] NET: Registered protocol family 1
[    0.308000] pci 0000:00:0e.4: enabling device (0000 -> 0002)
[    0.312000] PCI: CLS 32 bytes, default 32
[    0.892000] random: fast init done
[    1.740000] workingset: timestamp_bits=62 max_order=15 bucket_order=0
[    2.172000] NET: Registered protocol family 38
[    2.176000] io scheduler noop registered
[    2.180000] io scheduler cfq registered (default)
[    2.184000] slot: 8, pin: 1, irq: 38
[    2.188000] sisfb 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x3030
[    2.192000] sisfb: Video ROM not found
[    2.196000] sisfb: Video RAM at 0x40000000, mapped to 0x9000000040000000, size 32768k
[    2.200000] sisfb: MMIO at 0x50000000, mapped to 0x9000000050000000, size 256k
[    2.204000] sisfb: Memory heap starting at 32160K, size 32K
[    3.492000] sisfb: Detected SiS301C video bridge
[    3.576000] sisfb: Detected 1280x1024 flat panel
[    3.656000] sisfb: CRT2 DDC supported
[    3.660000] sisfb: CRT2 DDC level: 2 
[    3.868000] sisfb: Monitor range H 30-81KHz, V 56-76Hz, Max. dotclock 140MHz
[    3.872000] sisfb: Default mode is 1280x1024x8 (60Hz)
[    3.876000] sisfb: Initial vbflags 0x10000022
[    3.948000] Console: switching to colour frame buffer device 160x64
[    4.004000] sisfb: 2D acceleration is enabled, y-panning enabled (auto-max)
[    4.008000] fb0: SiS 315PRO frame buffer device version 1.8.9
[    4.012000] sisfb: Copyright (C) 2001-2005 Thomas Winischhofer
[    4.068000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    4.212000] printk: console [ttyS0] disabled
[    4.220000] serial8250.0: ttyS0 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    4.224000] printk: console [ttyS0] enabled
[    4.228000] printk: bootconsole [early0] disabled
[    4.848000] brd: module loaded
[    5.000000] loop: module loaded
[    5.000000] Uniform Multi-Platform E-IDE driver
[    5.004000] amd74xx 0000:00:0e.2: UDMA100 controller
[    5.008000] amd74xx 0000:00:0e.2: IDE controller (0x1022:0x209a rev 0x01)
[    5.012000] amd74xx 0000:00:0e.2: IDE port disabled
[    5.016000] amd74xx 0000:00:0e.2: not 100% native mode: will probe irqs later
[    5.020000]     ide0: BM-DMA at 0x4ce0-0x4ce7
[    5.024000] Probing IDE interface ide0...
[    5.412000] hda: WDC WD1600BEVS-00VAT0, ATA DISK drive
[    6.136000] hda: host max PIO5 wanted PIO255(auto-tune) selected PIO4
[    6.136000] hda: UDMA/100 mode selected
[    6.140000] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
[    6.144000] ide-gd driver 1.18
[    6.148000] hda: max request size: 1024KiB
[    6.228000] hda: 312581808 sectors (160041 MB) w/8192KiB Cache, CHS=19457/255/63
[    6.232000] hda: cache flushes supported
[    6.252000]  hda: hda1
[    6.256000] slot: 6, pin: 1, irq: 36
[    6.260000] r8169 0000:00:06.0: not PCI Express
[    6.264000] libphy: r8169: probed
[    6.268000] r8169 0000:00:06.0 eth0: RTL8169sc/8110sc, 00:23:9e:00:0f:54, XID 98000000, IRQ 36
[    6.272000] r8169 0000:00:06.0 eth0: jumbo features [frames: 7152 bytes, tx checksumming: ok]
[    6.276000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    6.280000] ehci-pci: EHCI PCI platform driver
[    6.284000] ehci-pci 0000:00:0e.5: EHCI Host Controller
[    6.288000] ehci-pci 0000:00:0e.5: new USB bus registered, assigned bus number 1
[    6.292000] ehci-pci 0000:00:0e.5: irq 11, io mem 0x50071000
[    6.432000] ehci-pci 0000:00:0e.5: USB 0.0 started, EHCI 1.00
[    6.436000] hub 1-0:1.0: USB hub found
[    6.448000] hub 1-0:1.0: 4 ports detected
[    6.456000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    6.460000] ohci-pci: OHCI PCI platform driver
[    6.464000] ohci-pci 0000:00:0e.4: OHCI PCI host controller
[    6.468000] ohci-pci 0000:00:0e.4: new USB bus registered, assigned bus number 2
[    6.472000] ohci-pci 0000:00:0e.4: irq 11, io mem 0x50070000
[    6.568000] hub 2-0:1.0: USB hub found
[    6.580000] hub 2-0:1.0: 4 ports detected
[    6.588000] usbcore: registered new interface driver usb-storage
[    6.592000] loongson2_cpufreq: Loongson-2F CPU frequency driver
[    6.596000] usbcore: registered new interface driver usbhid
[    6.600000] usbhid: USB HID core driver
[    6.608000] NET: Registered protocol family 17
[    6.680000] Freeing unused kernel memory: 2048K
[    6.684000] This architecture does not have kernel memory protection.
[    6.688000] Run /init as init process
[   10.872000] EXT4-fs (hda1): mounting ext3 file system using the ext4 subsystem
[   10.940000] EXT4-fs (hda1): mounted filesystem with ordered data mode. Opts: (null)
[   11.984000] random: crng init done
[   13.752000] Adding 524256k swap on /SWAP.  Priority:-2 extents:13 across:145760016k 
[   13.868000] RTL8211B Gigabit Ethernet r8169-30:00: attached PHY driver [RTL8211B Gigabit Ethernet] (mii_bus:phy_addr=r8169-30:00, irq=IGNORE)
[   16.604000] r8169 0000:00:06.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx

-----

2) Working PATA AMD.

[    0.000000] Linux version 4.20.0-lemote-los_42599 (aaro@amd-fx-6350) (gcc version 7.4.0 (GCC)) #1 Sat Jan 26 19:29:46 EET 2019
[    0.000000] memsize=256, highmemsize=256
[    0.000000] CpuClock = 797800000
[    0.000000] printk: bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 00006303 (ICT Loongson-2)
[    0.000000] FPU revision is: 00000501
[    0.000000] Checking for the multiply/shift bug... no.
[    0.000000] Checking for the daddiu bug... no.
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 0000000010000000 @ 0000000000000000 (usable)
[    0.000000]  memory: 0000000030000000 @ 0000000010000000 (reserved)
[    0.000000]  memory: 0000000010000000 @ 0000000090000000 (usable)
[    0.000000]  memory: 0000000010000000 @ 0000000080000000 (reserved)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Primary instruction cache 64kB, VIPT, direct mapped, linesize 32 bytes.
[    0.000000] Primary data cache 64kB, 4-way, VIPT, no aliases, linesize 32 bytes
[    0.000000] Unified secondary cache 512kB 4-way, linesize 32 bytes.
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000003fffffff]
[    0.000000]   node   0: [mem 0x0000000080000000-0x000000009fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] On node 0 totalpages: 98304
[    0.000000]   Normal zone: 336 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 98304 pages, LIFO batch:15
[    0.000000] random: get_random_bytes called from start_kernel+0xa0/0x580 with crng_init=0
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 97968
[    0.000000] Kernel command line: console=tty console=ttyS0,115200
[    0.000000] Dentry cache hash table entries: 262144 (order: 7, 2097152 bytes)
[    0.000000] Inode-cache hash table entries: 131072 (order: 6, 1048576 bytes)
[    0.000000] Memory: 491728K/1572864K available (4784K kernel code, 465K rwdata, 876K rodata, 2048K init, 16620K bss, 1081136K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 128
[    0.000000] Console: colour dummy device 80x25
[    0.000000] printk: console [tty0] enabled
[    0.000000] sched_clock: 64 bits at 250 Hz, resolution 4000000ns, wraps every 9007199254000000ns
[    0.004000] Calibrating delay loop... 528.38 BogoMIPS (lpj=1056768)
[    0.040000] pid_max: default: 32768 minimum: 301
[    0.044000] Mount-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.048000] Mountpoint-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.052000] Checking for the daddi bug... no.
[    0.060000] devtmpfs: initialized
[    0.064000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.068000] futex hash table entries: 256 (order: -2, 6144 bytes)
[    0.072000] NET: Registered protocol family 16
[    0.076000] clocksource: mfgpt: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133486551712 ns
[    0.124000] SCSI subsystem initialized
[    0.128000] libata version 3.00 loaded.
[    0.128000] usbcore: registered new interface driver usbfs
[    0.132000] usbcore: registered new interface driver hub
[    0.136000] usbcore: registered new device driver usb
[    0.144000] PCI host bridge to bus 0000:00
[    0.148000] pci_bus 0000:00: root bus resource [mem 0x40000000-0x7fffffff]
[    0.152000] pci_bus 0000:00: root bus resource [io  0x4000-0xffff]
[    0.156000] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[    0.160000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[    0.164000] pci 0000:00:06.0: [10ec:8169] type 00 class 0x020000
[    0.164000] pci 0000:00:06.0: reg 0x10: [io  0xb100-0xb1ff]
[    0.164000] pci 0000:00:06.0: reg 0x14: [mem 0x04075000-0x040750ff]
[    0.164000] pci 0000:00:06.0: reg 0x30: [mem 0x04040000-0x0405ffff pref]
[    0.164000] pci 0000:00:06.0: supports D1 D2
[    0.164000] pci 0000:00:06.0: PME# supported from D1 D2 D3hot
[    0.164000] pci 0000:00:08.0: [1039:0325] type 00 class 0x030000
[    0.164000] pci 0000:00:08.0: reg 0x10: [mem 0x40000000-0x4fffffff pref]
[    0.164000] pci 0000:00:08.0: reg 0x14: [mem 0x04000000-0x0403ffff]
[    0.164000] pci 0000:00:08.0: reg 0x18: [io  0xb300-0xb37f]
[    0.164000] pci 0000:00:08.0: reg 0x30: [mem 0x04060000-0x0406ffff pref]
[    0.164000] pci 0000:00:08.0: supports D1 D2
[    0.164000] pci 0000:00:0e.0: [1022:2090] type 00 class 0x060100
[    0.164000] pci 0000:00:0e.0: reg 0x10: [io  0xb410-0xb417]
[    0.164000] pci 0000:00:0e.0: reg 0x14: [io  0xb000-0xb0ff]
[    0.164000] pci 0000:00:0e.0: reg 0x18: [io  0xb380-0xb3bf]
[    0.164000] pci 0000:00:0e.0: reg 0x20: [io  0xb280-0xb2ff]
[    0.164000] pci 0000:00:0e.0: reg 0x24: [io  0xb3c0-0xb3df]
[    0.164000] pci 0000:00:0e.2: [1022:209a] type 00 class 0x010180
[    0.164000] pci 0000:00:0e.2: reg 0x20: [io  0xb400-0xb40f]
[    0.164000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.168000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.172000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.176000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.180000] pci 0000:00:0e.3: [1022:2093] type 00 class 0x040100
[    0.180000] pci 0000:00:0e.3: reg 0x10: [io  0xb200-0xb27f]
[    0.180000] pci 0000:00:0e.4: [1022:2094] type 00 class 0x0c0310
[    0.180000] pci 0000:00:0e.4: reg 0x10: [mem 0x04074000-0x04074fff]
[    0.180000] pci 0000:00:0e.5: [1022:2095] type 00 class 0x0c0320
[    0.180000] pci 0000:00:0e.5: reg 0x10: [mem 0x04073000-0x04073fff]
[    0.180000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    0.180000] pci 0000:00:08.0: BAR 0: assigned [mem 0x40000000-0x4fffffff pref]
[    0.184000] pci 0000:00:08.0: BAR 1: assigned [mem 0x50000000-0x5003ffff]
[    0.188000] pci 0000:00:06.0: BAR 6: assigned [mem 0x50040000-0x5005ffff pref]
[    0.192000] pci 0000:00:08.0: BAR 6: assigned [mem 0x50060000-0x5006ffff pref]
[    0.196000] pci 0000:00:0e.4: BAR 0: assigned [mem 0x50070000-0x50070fff]
[    0.200000] pci 0000:00:0e.5: BAR 0: assigned [mem 0x50071000-0x50071fff]
[    0.204000] pci 0000:00:06.0: BAR 0: assigned [io  0x4000-0x40ff]
[    0.208000] pci 0000:00:06.0: BAR 1: assigned [mem 0x50072000-0x500720ff]
[    0.212000] pci 0000:00:0e.0: BAR 1: assigned [io  0x4400-0x44ff]
[    0.216000] pci 0000:00:08.0: BAR 2: assigned [io  0x4800-0x487f]
[    0.220000] pci 0000:00:0e.0: BAR 4: assigned [io  0x4880-0x48ff]
[    0.224000] pci 0000:00:0e.3: BAR 0: assigned [io  0x4c00-0x4c7f]
[    0.228000] pci 0000:00:0e.0: BAR 2: assigned [io  0x4c80-0x4cbf]
[    0.232000] pci 0000:00:0e.0: BAR 5: assigned [io  0x4cc0-0x4cdf]
[    0.236000] pci 0000:00:0e.2: BAR 4: assigned [io  0x4ce0-0x4cef]
[    0.240000] pci 0000:00:0e.0: BAR 0: assigned [io  0x4cf0-0x4cf7]
[    0.244000] clocksource: Switched to clocksource mfgpt
[    0.268000] NET: Registered protocol family 2
[    0.276000] tcp_listen_portaddr_hash hash table entries: 1024 (order: 0, 16384 bytes)
[    0.284000] TCP established hash table entries: 16384 (order: 3, 131072 bytes)
[    0.288000] TCP bind hash table entries: 16384 (order: 3, 131072 bytes)
[    0.292000] TCP: Hash tables configured (established 16384 bind 16384)
[    0.296000] UDP hash table entries: 1024 (order: 1, 32768 bytes)
[    0.300000] UDP-Lite hash table entries: 1024 (order: 1, 32768 bytes)
[    0.304000] NET: Registered protocol family 1
[    0.308000] pci 0000:00:0e.4: enabling device (0000 -> 0002)
[    0.312000] PCI: CLS 32 bytes, default 32
[    0.892000] random: fast init done
[    1.736000] workingset: timestamp_bits=62 max_order=15 bucket_order=0
[    2.164000] NET: Registered protocol family 38
[    2.168000] io scheduler noop registered
[    2.172000] io scheduler cfq registered (default)
[    2.176000] slot: 8, pin: 1, irq: 38
[    2.180000] sisfb 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x3030
[    2.184000] sisfb: Video ROM not found
[    2.188000] sisfb: Video RAM at 0x40000000, mapped to 0x9000000040000000, size 32768k
[    2.192000] sisfb: MMIO at 0x50000000, mapped to 0x9000000050000000, size 256k
[    2.196000] sisfb: Memory heap starting at 32160K, size 32K
[    3.488000] sisfb: Detected SiS301C video bridge
[    3.572000] sisfb: Detected 1280x1024 flat panel
[    3.652000] sisfb: CRT1 DDC probing failed
[    3.656000] sisfb: Default mode is 1280x1024x8 (60Hz)
[    3.660000] sisfb: Initial vbflags 0x10000022
[    3.732000] Console: switching to colour frame buffer device 160x64
[    3.788000] sisfb: 2D acceleration is enabled, y-panning enabled (auto-max)
[    3.792000] fb0: SiS 315PRO frame buffer device version 1.8.9
[    3.796000] sisfb: Copyright (C) 2001-2005 Thomas Winischhofer
[    3.808000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    3.956000] printk: console [ttyS0] disabled
[    3.964000] serial8250.0: ttyS0 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    3.968000] printk: console [ttyS0] enabled
[    3.972000] printk: bootconsole [early0] disabled
[    4.692000] brd: module loaded
[    4.792000] loop: module loaded
[    4.796000] pata_amd 0000:00:0e.2: version 0.4.1
[    4.912000] random: crng init done
[    5.148000] scsi host0: pata_amd
[    5.384000] scsi host1: pata_amd
[    5.392000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
[    5.396000] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x4ce8 irq 15
[    5.404000] slot: 6, pin: 1, irq: 36
[    5.408000] r8169 0000:00:06.0: not PCI Express
[    5.416000] libphy: r8169: probed
[    5.428000] r8169 0000:00:06.0 eth0: RTL8169sc/8110sc, 00:23:9e:00:0f:54, XID 98000000, IRQ 36
[    5.432000] r8169 0000:00:06.0 eth0: jumbo features [frames: 7152 bytes, tx checksumming: ok]
[    5.440000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.444000] ehci-pci: EHCI PCI platform driver
[    5.452000] ehci-pci 0000:00:0e.5: EHCI Host Controller
[    5.456000] ehci-pci 0000:00:0e.5: new USB bus registered, assigned bus number 1
[    5.464000] ehci-pci 0000:00:0e.5: irq 11, io mem 0x50071000
[    5.676000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
[    5.680000] ata1.00: 312581808 sectors, multi 16: LBA48 
[    5.808000] scsi 0:0:0:0: Direct-Access     ATA      WDC WD1600BEVS-0 1A11 PQ: 0 ANSI: 5
[    5.816000] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
[    5.820000] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    5.828000] ata2: port disabled--ignoring
[    5.852000] sd 0:0:0:0: [sda] Write Protect is off
[    5.856000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    5.880000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    5.900000] ehci-pci 0000:00:0e.5: USB 0.0 started, EHCI 1.00
[    5.904000]  sda: sda1
[    5.908000] hub 1-0:1.0: USB hub found
[    5.932000] hub 1-0:1.0: 4 ports detected
[    5.936000] sd 0:0:0:0: [sda] Attached SCSI disk
[    5.952000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    5.956000] ohci-pci: OHCI PCI platform driver
[    5.960000] ohci-pci 0000:00:0e.4: OHCI PCI host controller
[    5.964000] ohci-pci 0000:00:0e.4: new USB bus registered, assigned bus number 2
[    5.968000] ohci-pci 0000:00:0e.4: irq 11, io mem 0x50070000
[    6.064000] hub 2-0:1.0: USB hub found
[    6.076000] hub 2-0:1.0: 4 ports detected
[    6.084000] usbcore: registered new interface driver usb-storage
[    6.088000] loongson2_cpufreq: Loongson-2F CPU frequency driver
[    6.092000] usbcore: registered new interface driver usbhid
[    6.096000] usbhid: USB HID core driver
[    6.100000] NET: Registered protocol family 17
[    6.172000] Freeing unused kernel memory: 2048K
[    6.176000] This architecture does not have kernel memory protection.
[    6.180000] Run /init as init process
[   10.396000] EXT4-fs (sda1): mounting ext3 file system using the ext4 subsystem
[   10.452000] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[   13.004000] Adding 524256k swap on /SWAP.  Priority:-2 extents:13 across:145760016k 
[   13.304000] RTL8211B Gigabit Ethernet r8169-30:00: attached PHY driver [RTL8211B Gigabit Ethernet] (mii_bus:phy_addr=r8169-30:00, irq=IGNORE)
[   15.812000] r8169 0000:00:06.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx

-----

3) Failing PATA AMD.

[    0.000000] Linux version 4.20.0-lemote-los_42599 (aaro@amd-fx-6350) (gcc version 7.4.0 (GCC)) #1 Sat Jan 26 19:29:46 EET 2019
[    0.000000] memsize=256, highmemsize=256
[    0.000000] CpuClock = 797800000
[    0.000000] printk: bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 00006303 (ICT Loongson-2)
[    0.000000] FPU revision is: 00000501
[    0.000000] Checking for the multiply/shift bug... no.
[    0.000000] Checking for the daddiu bug... no.
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 0000000010000000 @ 0000000000000000 (usable)
[    0.000000]  memory: 0000000030000000 @ 0000000010000000 (reserved)
[    0.000000]  memory: 0000000010000000 @ 0000000090000000 (usable)
[    0.000000]  memory: 0000000010000000 @ 0000000080000000 (reserved)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Primary instruction cache 64kB, VIPT, direct mapped, linesize 32 bytes.
[    0.000000] Primary data cache 64kB, 4-way, VIPT, no aliases, linesize 32 bytes
[    0.000000] Unified secondary cache 512kB 4-way, linesize 32 bytes.
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000003fffffff]
[    0.000000]   node   0: [mem 0x0000000080000000-0x000000009fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] On node 0 totalpages: 98304
[    0.000000]   Normal zone: 336 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 98304 pages, LIFO batch:15
[    0.000000] random: get_random_bytes called from start_kernel+0xa0/0x580 with crng_init=0
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 97968
[    0.000000] Kernel command line: console=tty console=ttyS0,115200
[    0.000000] Dentry cache hash table entries: 262144 (order: 7, 2097152 bytes)
[    0.000000] Inode-cache hash table entries: 131072 (order: 6, 1048576 bytes)
[    0.000000] Memory: 491728K/1572864K available (4784K kernel code, 465K rwdata, 876K rodata, 2048K init, 16620K bss, 1081136K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 128
[    0.000000] Console: colour dummy device 80x25
[    0.000000] printk: console [tty0] enabled
[    0.000000] sched_clock: 64 bits at 250 Hz, resolution 4000000ns, wraps every 9007199254000000ns
[    0.004000] Calibrating delay loop... 528.38 BogoMIPS (lpj=1056768)
[    0.040000] pid_max: default: 32768 minimum: 301
[    0.044000] Mount-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.048000] Mountpoint-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.052000] Checking for the daddi bug... no.
[    0.060000] devtmpfs: initialized
[    0.064000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.068000] futex hash table entries: 256 (order: -2, 6144 bytes)
[    0.072000] NET: Registered protocol family 16
[    0.076000] clocksource: mfgpt: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133486551712 ns
[    0.124000] SCSI subsystem initialized
[    0.128000] libata version 3.00 loaded.
[    0.128000] usbcore: registered new interface driver usbfs
[    0.132000] usbcore: registered new interface driver hub
[    0.136000] usbcore: registered new device driver usb
[    0.144000] PCI host bridge to bus 0000:00
[    0.148000] pci_bus 0000:00: root bus resource [mem 0x40000000-0x7fffffff]
[    0.152000] pci_bus 0000:00: root bus resource [io  0x4000-0xffff]
[    0.156000] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[    0.160000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[    0.164000] pci 0000:00:06.0: [10ec:8169] type 00 class 0x020000
[    0.164000] pci 0000:00:06.0: reg 0x10: [io  0xb100-0xb1ff]
[    0.164000] pci 0000:00:06.0: reg 0x14: [mem 0x04075000-0x040750ff]
[    0.164000] pci 0000:00:06.0: reg 0x30: [mem 0x04040000-0x0405ffff pref]
[    0.164000] pci 0000:00:06.0: supports D1 D2
[    0.164000] pci 0000:00:06.0: PME# supported from D1 D2 D3hot
[    0.164000] pci 0000:00:08.0: [1039:0325] type 00 class 0x030000
[    0.164000] pci 0000:00:08.0: reg 0x10: [mem 0x40000000-0x4fffffff pref]
[    0.164000] pci 0000:00:08.0: reg 0x14: [mem 0x04000000-0x0403ffff]
[    0.164000] pci 0000:00:08.0: reg 0x18: [io  0xb300-0xb37f]
[    0.164000] pci 0000:00:08.0: reg 0x30: [mem 0x04060000-0x0406ffff pref]
[    0.164000] pci 0000:00:08.0: supports D1 D2
[    0.164000] pci 0000:00:0e.0: [1022:2090] type 00 class 0x060100
[    0.164000] pci 0000:00:0e.0: reg 0x10: [io  0xb410-0xb417]
[    0.164000] pci 0000:00:0e.0: reg 0x14: [io  0xb000-0xb0ff]
[    0.164000] pci 0000:00:0e.0: reg 0x18: [io  0xb380-0xb3bf]
[    0.164000] pci 0000:00:0e.0: reg 0x20: [io  0xb280-0xb2ff]
[    0.164000] pci 0000:00:0e.0: reg 0x24: [io  0xb3c0-0xb3df]
[    0.164000] pci 0000:00:0e.2: [1022:209a] type 00 class 0x010180
[    0.164000] pci 0000:00:0e.2: reg 0x20: [io  0xb400-0xb40f]
[    0.164000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.168000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.172000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.176000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.180000] pci 0000:00:0e.3: [1022:2093] type 00 class 0x040100
[    0.180000] pci 0000:00:0e.3: reg 0x10: [io  0xb200-0xb27f]
[    0.180000] pci 0000:00:0e.4: [1022:2094] type 00 class 0x0c0310
[    0.180000] pci 0000:00:0e.4: reg 0x10: [mem 0x04074000-0x04074fff]
[    0.180000] pci 0000:00:0e.5: [1022:2095] type 00 class 0x0c0320
[    0.180000] pci 0000:00:0e.5: reg 0x10: [mem 0x04073000-0x04073fff]
[    0.180000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    0.180000] pci 0000:00:08.0: BAR 0: assigned [mem 0x40000000-0x4fffffff pref]
[    0.184000] pci 0000:00:08.0: BAR 1: assigned [mem 0x50000000-0x5003ffff]
[    0.188000] pci 0000:00:06.0: BAR 6: assigned [mem 0x50040000-0x5005ffff pref]
[    0.192000] pci 0000:00:08.0: BAR 6: assigned [mem 0x50060000-0x5006ffff pref]
[    0.196000] pci 0000:00:0e.4: BAR 0: assigned [mem 0x50070000-0x50070fff]
[    0.200000] pci 0000:00:0e.5: BAR 0: assigned [mem 0x50071000-0x50071fff]
[    0.204000] pci 0000:00:06.0: BAR 0: assigned [io  0x4000-0x40ff]
[    0.208000] pci 0000:00:06.0: BAR 1: assigned [mem 0x50072000-0x500720ff]
[    0.212000] pci 0000:00:0e.0: BAR 1: assigned [io  0x4400-0x44ff]
[    0.216000] pci 0000:00:08.0: BAR 2: assigned [io  0x4800-0x487f]
[    0.220000] pci 0000:00:0e.0: BAR 4: assigned [io  0x4880-0x48ff]
[    0.224000] pci 0000:00:0e.3: BAR 0: assigned [io  0x4c00-0x4c7f]
[    0.228000] pci 0000:00:0e.0: BAR 2: assigned [io  0x4c80-0x4cbf]
[    0.232000] pci 0000:00:0e.0: BAR 5: assigned [io  0x4cc0-0x4cdf]
[    0.236000] pci 0000:00:0e.2: BAR 4: assigned [io  0x4ce0-0x4cef]
[    0.240000] pci 0000:00:0e.0: BAR 0: assigned [io  0x4cf0-0x4cf7]
[    0.244000] clocksource: Switched to clocksource mfgpt
[    0.272000] NET: Registered protocol family 2
[    0.276000] tcp_listen_portaddr_hash hash table entries: 1024 (order: 0, 16384 bytes)
[    0.280000] TCP established hash table entries: 16384 (order: 3, 131072 bytes)
[    0.284000] TCP bind hash table entries: 16384 (order: 3, 131072 bytes)
[    0.288000] TCP: Hash tables configured (established 16384 bind 16384)
[    0.292000] UDP hash table entries: 1024 (order: 1, 32768 bytes)
[    0.296000] UDP-Lite hash table entries: 1024 (order: 1, 32768 bytes)
[    0.300000] NET: Registered protocol family 1
[    0.304000] pci 0000:00:0e.4: enabling device (0000 -> 0002)
[    0.308000] PCI: CLS 32 bytes, default 32
[    0.892000] random: fast init done
[    1.736000] workingset: timestamp_bits=62 max_order=15 bucket_order=0
[    2.168000] NET: Registered protocol family 38
[    2.172000] io scheduler noop registered
[    2.176000] io scheduler cfq registered (default)
[    2.180000] slot: 8, pin: 1, irq: 38
[    2.184000] sisfb 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x3030
[    2.188000] sisfb: Video ROM not found
[    2.192000] sisfb: Video RAM at 0x40000000, mapped to 0x9000000040000000, size 32768k
[    2.196000] sisfb: MMIO at 0x50000000, mapped to 0x9000000050000000, size 256k
[    2.200000] sisfb: Memory heap starting at 32160K, size 32K
[    3.488000] sisfb: Detected SiS301C video bridge
[    3.572000] sisfb: Detected 1280x1024 flat panel
[    3.652000] sisfb: CRT1 DDC probing failed
[    3.656000] sisfb: Default mode is 1280x1024x8 (60Hz)
[    3.660000] sisfb: Initial vbflags 0x10000022
[    3.736000] Console: switching to colour frame buffer device 160x64
[    3.796000] sisfb: 2D acceleration is enabled, y-panning enabled (auto-max)
[    3.800000] fb0: SiS 315PRO frame buffer device version 1.8.9
[    3.804000] sisfb: Copyright (C) 2001-2005 Thomas Winischhofer
[    3.812000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    3.960000] printk: console [ttyS0] disabled
[    3.968000] serial8250.0: ttyS0 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    3.972000] printk: console [ttyS0] enabled
[    3.976000] printk: bootconsole [early0] disabled
[    4.628000] brd: module loaded
[    4.740000] loop: module loaded
[    4.744000] pata_amd 0000:00:0e.2: version 0.4.1
[    4.860000] random: crng init done
[    5.320000] scsi host0: pata_amd
[    5.608000] scsi host1: pata_amd
[    5.612000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
[    5.616000] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x4ce8 irq 15
[    5.624000] slot: 6, pin: 1, irq: 36
[    5.628000] r8169 0000:00:06.0: not PCI Express
[    5.636000] libphy: r8169: probed
[    5.648000] r8169 0000:00:06.0 eth0: RTL8169sc/8110sc, 00:23:9e:00:0f:54, XID 98000000, IRQ 36
[    5.652000] r8169 0000:00:06.0 eth0: jumbo features [frames: 7152 bytes, tx checksumming: ok]
[    5.656000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.660000] ehci-pci: EHCI PCI platform driver
[    5.664000] ehci-pci 0000:00:0e.5: EHCI Host Controller
[    5.668000] ehci-pci 0000:00:0e.5: new USB bus registered, assigned bus number 1
[    5.676000] ehci-pci 0000:00:0e.5: irq 11, io mem 0x50071000
[    5.736000] irq 14: nobody cared (try booting with the "irqpoll" option)
[    5.736000] CPU: 0 PID: 551 Comm: block_add.sh Not tainted 4.20.0-lemote-los_42599 #1
[    5.736000] Stack : 00000000000000a3 00000000000000a4 ffffffffcfffffff 980000009f023d78
[    5.736000]         82327644e4724700 0000000000000000 0000000000000000 ffffffff81a40000
[    5.736000]         00000000000000a4 0000000000000007 0000000000000000 ffffffff806d7388
[    5.736000]         0000000000000000 0000000000000004 0000000000000002 980000009fb533d0
[    5.736000]         9000000040121b08 ffffffff80790000 ffffff0000000000 000000000000000e
[    5.736000]         0000000077b3f306 0000000077b2f930 0000000077b41aac 0000000000000000
[    5.736000]         0000000000000003 ffffffffffffffff 9000000040121b0c 0000000000000000
[    5.736000]         ffffffff80a10000 980000009f490000 980000009f023d70 000000007fc763f0
[    5.736000]         ffffffff80262a38 0000000000000000 0000000000000000 0000000000000000
[    5.736000]         0000000000000000 82327644e4724700 ffffffff8020f504 82327644e4724700
[    5.736000]         ...
[    5.736000] Call Trace:
[    5.736000] [<ffffffff8020f504>] show_stack+0x90/0x140
[    5.736000] [<ffffffff80262a38>] __report_bad_irq+0x44/0xf4
[    5.736000] [<ffffffff80262ddc>] note_interrupt+0x274/0x318
[    5.736000] [<ffffffff8025fec4>] handle_irq_event_percpu+0x60/0x9c
[    5.736000] [<ffffffff8025ff3c>] handle_irq_event+0x3c/0x70
[    5.736000] [<ffffffff80263f78>] handle_level_irq+0x10c/0x148
[    5.736000] [<ffffffff8025f498>] generic_handle_irq+0x34/0x50
[    5.736000] [<ffffffff806aa298>] do_IRQ+0x18/0x24
[    5.736000] [<ffffffff80208ec4>] handle_int+0x17c/0x188
[    5.736000] handlers:
[    5.736000] [<0000000059069b40>] ata_bmdma_interrupt
[    5.736000] Disabling IRQ #14
[    5.944000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
[    5.948000] ata1.00: 312581808 sectors, multi 16: LBA48 
[    5.980000] ehci-pci 0000:00:0e.5: USB 0.0 started, EHCI 1.00
[    5.984000] hub 1-0:1.0: USB hub found
[    5.996000] hub 1-0:1.0: 4 ports detected
[    6.004000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    6.008000] ohci-pci: OHCI PCI platform driver
[    6.012000] ohci-pci 0000:00:0e.4: OHCI PCI host controller
[    6.016000] ohci-pci 0000:00:0e.4: new USB bus registered, assigned bus number 2
[    6.020000] ohci-pci 0000:00:0e.4: irq 11, io mem 0x50070000
[    6.048000] scsi 0:0:0:0: Direct-Access     ATA      WDC WD1600BEVS-0 1A11 PQ: 0 ANSI: 5
[    6.052000] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
[    6.056000] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    6.060000] ata2: port disabled--ignoring
[    6.076000] sd 0:0:0:0: [sda] Write Protect is off
[    6.080000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    6.092000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    6.136000] hub 2-0:1.0: USB hub found
[    6.148000] hub 2-0:1.0: 4 ports detected
[    6.152000] usbcore: registered new interface driver usb-storage
[    6.156000] loongson2_cpufreq: Loongson-2F CPU frequency driver
[    6.160000] usbcore: registered new interface driver usbhid
[    6.164000] usbhid: USB HID core driver
[    6.172000] NET: Registered protocol family 17
[    6.360000]  sda: sda1
[    6.376000] sd 0:0:0:0: [sda] Attached SCSI disk
[    6.388000] Freeing unused kernel memory: 2048K
[    6.392000] This architecture does not have kernel memory protection.
[    6.396000] Run /init as init process
[   36.728000] EXT4-fs (sda1): mounting ext3 file system using the ext4 subsystem
[   37.876000] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[   65.500000] RTL8211B Gigabit Ethernet r8169-30:00: attached PHY driver [RTL8211B Gigabit Ethernet] (mii_bus:phy_addr=r8169-30:00, irq=IGNORE)
[   69.920000] r8169 0000:00:06.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[   76.456000] Adding 524256k swap on /SWAP.  Priority:-2 extents:13 across:145760016k 

4) Working PATA CS5536.

[    0.000000] Linux version 4.20.0-lemote-los_42599+ (aaro@amd-fx-6350) (gcc version 7.4.0 (GCC)) #1 Sat Jan 26 19:42:09 EET 2019
[    0.000000] memsize=256, highmemsize=256
[    0.000000] CpuClock = 797780000
[    0.000000] printk: bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 00006303 (ICT Loongson-2)
[    0.000000] FPU revision is: 00000501
[    0.000000] Checking for the multiply/shift bug... no.
[    0.000000] Checking for the daddiu bug... no.
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 0000000010000000 @ 0000000000000000 (usable)
[    0.000000]  memory: 0000000030000000 @ 0000000010000000 (reserved)
[    0.000000]  memory: 0000000010000000 @ 0000000090000000 (usable)
[    0.000000]  memory: 0000000010000000 @ 0000000080000000 (reserved)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Primary instruction cache 64kB, VIPT, direct mapped, linesize 32 bytes.
[    0.000000] Primary data cache 64kB, 4-way, VIPT, no aliases, linesize 32 bytes
[    0.000000] Unified secondary cache 512kB 4-way, linesize 32 bytes.
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000003fffffff]
[    0.000000]   node   0: [mem 0x0000000080000000-0x000000009fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] On node 0 totalpages: 98304
[    0.000000]   Normal zone: 336 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 98304 pages, LIFO batch:15
[    0.000000] random: get_random_bytes called from start_kernel+0xa0/0x580 with crng_init=0
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 97968
[    0.000000] Kernel command line: console=tty console=ttyS0,115200
[    0.000000] Dentry cache hash table entries: 262144 (order: 7, 2097152 bytes)
[    0.000000] Inode-cache hash table entries: 131072 (order: 6, 1048576 bytes)
[    0.000000] Memory: 491728K/1572864K available (4782K kernel code, 471K rwdata, 872K rodata, 2048K init, 16620K bss, 1081136K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 128
[    0.000000] Console: colour dummy device 80x25
[    0.000000] printk: console [tty0] enabled
[    0.000000] sched_clock: 64 bits at 250 Hz, resolution 4000000ns, wraps every 9007199254000000ns
[    0.004000] Calibrating delay loop... 528.38 BogoMIPS (lpj=1056768)
[    0.040000] pid_max: default: 32768 minimum: 301
[    0.044000] Mount-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.048000] Mountpoint-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.052000] Checking for the daddi bug... no.
[    0.060000] devtmpfs: initialized
[    0.064000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.068000] futex hash table entries: 256 (order: -2, 6144 bytes)
[    0.072000] NET: Registered protocol family 16
[    0.076000] clocksource: mfgpt: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133486551712 ns
[    0.124000] SCSI subsystem initialized
[    0.128000] libata version 3.00 loaded.
[    0.128000] usbcore: registered new interface driver usbfs
[    0.132000] usbcore: registered new interface driver hub
[    0.136000] usbcore: registered new device driver usb
[    0.140000] PCI host bridge to bus 0000:00
[    0.144000] pci_bus 0000:00: root bus resource [mem 0x40000000-0x7fffffff]
[    0.148000] pci_bus 0000:00: root bus resource [io  0x4000-0xffff]
[    0.152000] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[    0.156000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[    0.160000] pci 0000:00:06.0: [10ec:8169] type 00 class 0x020000
[    0.160000] pci 0000:00:06.0: reg 0x10: [io  0xb100-0xb1ff]
[    0.160000] pci 0000:00:06.0: reg 0x14: [mem 0x04075000-0x040750ff]
[    0.160000] pci 0000:00:06.0: reg 0x30: [mem 0x04040000-0x0405ffff pref]
[    0.164000] pci 0000:00:06.0: supports D1 D2
[    0.164000] pci 0000:00:06.0: PME# supported from D1 D2 D3hot
[    0.164000] pci 0000:00:08.0: [1039:0325] type 00 class 0x030000
[    0.164000] pci 0000:00:08.0: reg 0x10: [mem 0x40000000-0x4fffffff pref]
[    0.164000] pci 0000:00:08.0: reg 0x14: [mem 0x04000000-0x0403ffff]
[    0.164000] pci 0000:00:08.0: reg 0x18: [io  0xb300-0xb37f]
[    0.164000] pci 0000:00:08.0: reg 0x30: [mem 0x04060000-0x0406ffff pref]
[    0.164000] pci 0000:00:08.0: supports D1 D2
[    0.164000] pci 0000:00:0e.0: [1022:2090] type 00 class 0x060100
[    0.164000] pci 0000:00:0e.0: reg 0x10: [io  0xb410-0xb417]
[    0.164000] pci 0000:00:0e.0: reg 0x14: [io  0xb000-0xb0ff]
[    0.164000] pci 0000:00:0e.0: reg 0x18: [io  0xb380-0xb3bf]
[    0.164000] pci 0000:00:0e.0: reg 0x20: [io  0xb280-0xb2ff]
[    0.164000] pci 0000:00:0e.0: reg 0x24: [io  0xb3c0-0xb3df]
[    0.164000] pci 0000:00:0e.2: [1022:209a] type 00 class 0x010180
[    0.164000] pci 0000:00:0e.2: reg 0x20: [io  0xb400-0xb40f]
[    0.164000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.168000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.172000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.176000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.180000] pci 0000:00:0e.3: [1022:2093] type 00 class 0x040100
[    0.180000] pci 0000:00:0e.3: reg 0x10: [io  0xb200-0xb27f]
[    0.180000] pci 0000:00:0e.4: [1022:2094] type 00 class 0x0c0310
[    0.180000] pci 0000:00:0e.4: reg 0x10: [mem 0x04074000-0x04074fff]
[    0.180000] pci 0000:00:0e.5: [1022:2095] type 00 class 0x0c0320
[    0.180000] pci 0000:00:0e.5: reg 0x10: [mem 0x04073000-0x04073fff]
[    0.180000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    0.180000] pci 0000:00:08.0: BAR 0: assigned [mem 0x40000000-0x4fffffff pref]
[    0.184000] pci 0000:00:08.0: BAR 1: assigned [mem 0x50000000-0x5003ffff]
[    0.188000] pci 0000:00:06.0: BAR 6: assigned [mem 0x50040000-0x5005ffff pref]
[    0.192000] pci 0000:00:08.0: BAR 6: assigned [mem 0x50060000-0x5006ffff pref]
[    0.196000] pci 0000:00:0e.4: BAR 0: assigned [mem 0x50070000-0x50070fff]
[    0.200000] pci 0000:00:0e.5: BAR 0: assigned [mem 0x50071000-0x50071fff]
[    0.204000] pci 0000:00:06.0: BAR 0: assigned [io  0x4000-0x40ff]
[    0.208000] pci 0000:00:06.0: BAR 1: assigned [mem 0x50072000-0x500720ff]
[    0.212000] pci 0000:00:0e.0: BAR 1: assigned [io  0x4400-0x44ff]
[    0.216000] pci 0000:00:08.0: BAR 2: assigned [io  0x4800-0x487f]
[    0.220000] pci 0000:00:0e.0: BAR 4: assigned [io  0x4880-0x48ff]
[    0.224000] pci 0000:00:0e.3: BAR 0: assigned [io  0x4c00-0x4c7f]
[    0.228000] pci 0000:00:0e.0: BAR 2: assigned [io  0x4c80-0x4cbf]
[    0.232000] pci 0000:00:0e.0: BAR 5: assigned [io  0x4cc0-0x4cdf]
[    0.236000] pci 0000:00:0e.2: BAR 4: assigned [io  0x4ce0-0x4cef]
[    0.240000] pci 0000:00:0e.0: BAR 0: assigned [io  0x4cf0-0x4cf7]
[    0.244000] clocksource: Switched to clocksource mfgpt
[    0.272000] NET: Registered protocol family 2
[    0.276000] tcp_listen_portaddr_hash hash table entries: 1024 (order: 0, 16384 bytes)
[    0.280000] TCP established hash table entries: 16384 (order: 3, 131072 bytes)
[    0.288000] TCP bind hash table entries: 16384 (order: 3, 131072 bytes)
[    0.292000] TCP: Hash tables configured (established 16384 bind 16384)
[    0.296000] UDP hash table entries: 1024 (order: 1, 32768 bytes)
[    0.300000] UDP-Lite hash table entries: 1024 (order: 1, 32768 bytes)
[    0.304000] NET: Registered protocol family 1
[    0.308000] pci 0000:00:0e.4: enabling device (0000 -> 0002)
[    0.312000] PCI: CLS 32 bytes, default 32
[    0.896000] random: fast init done
[    1.724000] workingset: timestamp_bits=62 max_order=15 bucket_order=0
[    2.164000] NET: Registered protocol family 38
[    2.168000] io scheduler noop registered
[    2.172000] io scheduler cfq registered (default)
[    2.180000] slot: 8, pin: 1, irq: 38
[    2.184000] sisfb 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x3030
[    2.188000] sisfb: Video ROM not found
[    2.192000] sisfb: Video RAM at 0x40000000, mapped to 0x9000000040000000, size 32768k
[    2.196000] sisfb: MMIO at 0x50000000, mapped to 0x9000000050000000, size 256k
[    2.200000] sisfb: Memory heap starting at 32160K, size 32K
[    3.484000] sisfb: Detected SiS301C video bridge
[    3.564000] sisfb: Detected 1280x1024 flat panel
[    3.648000] sisfb: CRT1 DDC probing failed
[    3.652000] sisfb: Default mode is 1280x1024x8 (60Hz)
[    3.656000] sisfb: Initial vbflags 0x10000022
[    3.728000] Console: switching to colour frame buffer device 160x64
[    3.784000] sisfb: 2D acceleration is enabled, y-panning enabled (auto-max)
[    3.788000] fb0: SiS 315PRO frame buffer device version 1.8.9
[    3.792000] sisfb: Copyright (C) 2001-2005 Thomas Winischhofer
[    3.808000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    3.952000] printk: console [ttyS0] disabled
[    3.960000] serial8250.0: ttyS0 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    3.964000] printk: console [ttyS0] enabled
[    3.968000] printk: bootconsole [early0] disabled
[    4.592000] brd: module loaded
[    4.764000] loop: module loaded
[    4.880000] random: crng init done
[    5.108000] scsi host0: pata_cs5536
[    5.444000] scsi host1: pata_cs5536
[    5.448000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
[    5.452000] ata2: DUMMY
[    5.460000] slot: 6, pin: 1, irq: 36
[    5.464000] r8169 0000:00:06.0: not PCI Express
[    5.472000] libphy: r8169: probed
[    5.484000] r8169 0000:00:06.0 eth0: RTL8169sc/8110sc, 00:23:9e:00:0f:54, XID 98000000, IRQ 36
[    5.488000] r8169 0000:00:06.0 eth0: jumbo features [frames: 7152 bytes, tx checksumming: ok]
[    5.492000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.496000] ehci-pci: EHCI PCI platform driver
[    5.500000] ehci-pci 0000:00:0e.5: EHCI Host Controller
[    5.504000] ehci-pci 0000:00:0e.5: new USB bus registered, assigned bus number 1
[    5.512000] ehci-pci 0000:00:0e.5: irq 11, io mem 0x50071000
[    5.732000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
[    5.736000] ata1.00: 312581808 sectors, multi 16: LBA48 
[    5.740000] ata1.00: limited to UDMA/33 due to 40-wire cable
[    5.884000] scsi 0:0:0:0: Direct-Access     ATA      WDC WD1600BEVS-0 1A11 PQ: 0 ANSI: 5
[    5.888000] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
[    5.892000] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    5.920000] sd 0:0:0:0: [sda] Write Protect is off
[    5.924000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    5.936000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    5.952000] ehci-pci 0000:00:0e.5: USB 0.0 started, EHCI 1.00
[    5.960000]  sda: sda1
[    5.964000] hub 1-0:1.0: USB hub found
[    5.988000] hub 1-0:1.0: 4 ports detected
[    5.992000] sd 0:0:0:0: [sda] Attached SCSI disk
[    6.004000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    6.008000] ohci-pci: OHCI PCI platform driver
[    6.012000] ohci-pci 0000:00:0e.4: OHCI PCI host controller
[    6.016000] ohci-pci 0000:00:0e.4: new USB bus registered, assigned bus number 2
[    6.024000] ohci-pci 0000:00:0e.4: irq 11, io mem 0x50070000
[    6.120000] hub 2-0:1.0: USB hub found
[    6.132000] hub 2-0:1.0: 4 ports detected
[    6.140000] usbcore: registered new interface driver usb-storage
[    6.144000] loongson2_cpufreq: Loongson-2F CPU frequency driver
[    6.148000] usbcore: registered new interface driver usbhid
[    6.152000] usbhid: USB HID core driver
[    6.156000] NET: Registered protocol family 17
[    6.228000] Freeing unused kernel memory: 2048K
[    6.232000] This architecture does not have kernel memory protection.
[    6.236000] Run /init as init process
[   10.512000] EXT4-fs (sda1): mounting ext3 file system using the ext4 subsystem
[   10.576000] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[   13.196000] Adding 524256k swap on /SWAP.  Priority:-2 extents:13 across:145760016k 
[   13.488000] RTL8211B Gigabit Ethernet r8169-30:00: attached PHY driver [RTL8211B Gigabit Ethernet] (mii_bus:phy_addr=r8169-30:00, irq=IGNORE)
[   16.260000] r8169 0000:00:06.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx

-----

5) Failing PATA CS5536.

[    0.000000] Linux version 4.20.0-lemote-los_42599+ (aaro@amd-fx-6350) (gcc version 7.4.0 (GCC)) #1 Sat Jan 26 19:42:09 EET 2019
[    0.000000] memsize=256, highmemsize=256
[    0.000000] CpuClock = 797800000
[    0.000000] printk: bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 00006303 (ICT Loongson-2)
[    0.000000] FPU revision is: 00000501
[    0.000000] Checking for the multiply/shift bug... no.
[    0.000000] Checking for the daddiu bug... no.
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 0000000010000000 @ 0000000000000000 (usable)
[    0.000000]  memory: 0000000030000000 @ 0000000010000000 (reserved)
[    0.000000]  memory: 0000000010000000 @ 0000000090000000 (usable)
[    0.000000]  memory: 0000000010000000 @ 0000000080000000 (reserved)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Primary instruction cache 64kB, VIPT, direct mapped, linesize 32 bytes.
[    0.000000] Primary data cache 64kB, 4-way, VIPT, no aliases, linesize 32 bytes
[    0.000000] Unified secondary cache 512kB 4-way, linesize 32 bytes.
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000003fffffff]
[    0.000000]   node   0: [mem 0x0000000080000000-0x000000009fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000009fffffff]
[    0.000000] On node 0 totalpages: 98304
[    0.000000]   Normal zone: 336 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 98304 pages, LIFO batch:15
[    0.000000] random: get_random_bytes called from start_kernel+0xa0/0x580 with crng_init=0
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 97968
[    0.000000] Kernel command line: console=tty console=ttyS0,115200
[    0.000000] Dentry cache hash table entries: 262144 (order: 7, 2097152 bytes)
[    0.000000] Inode-cache hash table entries: 131072 (order: 6, 1048576 bytes)
[    0.000000] Memory: 491728K/1572864K available (4782K kernel code, 471K rwdata, 872K rodata, 2048K init, 16620K bss, 1081136K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 128
[    0.000000] Console: colour dummy device 80x25
[    0.000000] printk: console [tty0] enabled
[    0.000000] sched_clock: 64 bits at 250 Hz, resolution 4000000ns, wraps every 9007199254000000ns
[    0.004000] Calibrating delay loop... 528.38 BogoMIPS (lpj=1056768)
[    0.040000] pid_max: default: 32768 minimum: 301
[    0.044000] Mount-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.048000] Mountpoint-cache hash table entries: 4096 (order: 1, 32768 bytes)
[    0.052000] Checking for the daddi bug... no.
[    0.060000] devtmpfs: initialized
[    0.064000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.068000] futex hash table entries: 256 (order: -2, 6144 bytes)
[    0.072000] NET: Registered protocol family 16
[    0.076000] clocksource: mfgpt: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 133486551712 ns
[    0.124000] SCSI subsystem initialized
[    0.128000] libata version 3.00 loaded.
[    0.128000] usbcore: registered new interface driver usbfs
[    0.132000] usbcore: registered new interface driver hub
[    0.136000] usbcore: registered new device driver usb
[    0.140000] PCI host bridge to bus 0000:00
[    0.144000] pci_bus 0000:00: root bus resource [mem 0x40000000-0x7fffffff]
[    0.148000] pci_bus 0000:00: root bus resource [io  0x4000-0xffff]
[    0.152000] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[    0.156000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[    0.160000] pci 0000:00:06.0: [10ec:8169] type 00 class 0x020000
[    0.160000] pci 0000:00:06.0: reg 0x10: [io  0xb100-0xb1ff]
[    0.160000] pci 0000:00:06.0: reg 0x14: [mem 0x04075000-0x040750ff]
[    0.160000] pci 0000:00:06.0: reg 0x30: [mem 0x04040000-0x0405ffff pref]
[    0.164000] pci 0000:00:06.0: supports D1 D2
[    0.164000] pci 0000:00:06.0: PME# supported from D1 D2 D3hot
[    0.164000] pci 0000:00:08.0: [1039:0325] type 00 class 0x030000
[    0.164000] pci 0000:00:08.0: reg 0x10: [mem 0x40000000-0x4fffffff pref]
[    0.164000] pci 0000:00:08.0: reg 0x14: [mem 0x04000000-0x0403ffff]
[    0.164000] pci 0000:00:08.0: reg 0x18: [io  0xb300-0xb37f]
[    0.164000] pci 0000:00:08.0: reg 0x30: [mem 0x04060000-0x0406ffff pref]
[    0.164000] pci 0000:00:08.0: supports D1 D2
[    0.164000] pci 0000:00:0e.0: [1022:2090] type 00 class 0x060100
[    0.164000] pci 0000:00:0e.0: reg 0x10: [io  0xb410-0xb417]
[    0.164000] pci 0000:00:0e.0: reg 0x14: [io  0xb000-0xb0ff]
[    0.164000] pci 0000:00:0e.0: reg 0x18: [io  0xb380-0xb3bf]
[    0.164000] pci 0000:00:0e.0: reg 0x20: [io  0xb280-0xb2ff]
[    0.164000] pci 0000:00:0e.0: reg 0x24: [io  0xb3c0-0xb3df]
[    0.164000] pci 0000:00:0e.2: [1022:209a] type 00 class 0x010180
[    0.164000] pci 0000:00:0e.2: reg 0x20: [io  0xb400-0xb40f]
[    0.164000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.168000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.172000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.176000] pci 0000:00:0e.2: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.180000] pci 0000:00:0e.3: [1022:2093] type 00 class 0x040100
[    0.180000] pci 0000:00:0e.3: reg 0x10: [io  0xb200-0xb27f]
[    0.180000] pci 0000:00:0e.4: [1022:2094] type 00 class 0x0c0310
[    0.180000] pci 0000:00:0e.4: reg 0x10: [mem 0x04074000-0x04074fff]
[    0.180000] pci 0000:00:0e.5: [1022:2095] type 00 class 0x0c0320
[    0.180000] pci 0000:00:0e.5: reg 0x10: [mem 0x04073000-0x04073fff]
[    0.180000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    0.180000] pci 0000:00:08.0: BAR 0: assigned [mem 0x40000000-0x4fffffff pref]
[    0.184000] pci 0000:00:08.0: BAR 1: assigned [mem 0x50000000-0x5003ffff]
[    0.188000] pci 0000:00:06.0: BAR 6: assigned [mem 0x50040000-0x5005ffff pref]
[    0.192000] pci 0000:00:08.0: BAR 6: assigned [mem 0x50060000-0x5006ffff pref]
[    0.196000] pci 0000:00:0e.4: BAR 0: assigned [mem 0x50070000-0x50070fff]
[    0.200000] pci 0000:00:0e.5: BAR 0: assigned [mem 0x50071000-0x50071fff]
[    0.204000] pci 0000:00:06.0: BAR 0: assigned [io  0x4000-0x40ff]
[    0.208000] pci 0000:00:06.0: BAR 1: assigned [mem 0x50072000-0x500720ff]
[    0.212000] pci 0000:00:0e.0: BAR 1: assigned [io  0x4400-0x44ff]
[    0.216000] pci 0000:00:08.0: BAR 2: assigned [io  0x4800-0x487f]
[    0.220000] pci 0000:00:0e.0: BAR 4: assigned [io  0x4880-0x48ff]
[    0.224000] pci 0000:00:0e.3: BAR 0: assigned [io  0x4c00-0x4c7f]
[    0.228000] pci 0000:00:0e.0: BAR 2: assigned [io  0x4c80-0x4cbf]
[    0.232000] pci 0000:00:0e.0: BAR 5: assigned [io  0x4cc0-0x4cdf]
[    0.236000] pci 0000:00:0e.2: BAR 4: assigned [io  0x4ce0-0x4cef]
[    0.240000] pci 0000:00:0e.0: BAR 0: assigned [io  0x4cf0-0x4cf7]
[    0.244000] clocksource: Switched to clocksource mfgpt
[    0.272000] NET: Registered protocol family 2
[    0.276000] tcp_listen_portaddr_hash hash table entries: 1024 (order: 0, 16384 bytes)
[    0.280000] TCP established hash table entries: 16384 (order: 3, 131072 bytes)
[    0.284000] TCP bind hash table entries: 16384 (order: 3, 131072 bytes)
[    0.288000] TCP: Hash tables configured (established 16384 bind 16384)
[    0.292000] UDP hash table entries: 1024 (order: 1, 32768 bytes)
[    0.296000] UDP-Lite hash table entries: 1024 (order: 1, 32768 bytes)
[    0.300000] NET: Registered protocol family 1
[    0.304000] pci 0000:00:0e.4: enabling device (0000 -> 0002)
[    0.308000] PCI: CLS 32 bytes, default 32
[    0.896000] random: fast init done
[    1.732000] workingset: timestamp_bits=62 max_order=15 bucket_order=0
[    2.160000] NET: Registered protocol family 38
[    2.164000] io scheduler noop registered
[    2.168000] io scheduler cfq registered (default)
[    2.176000] slot: 8, pin: 1, irq: 38
[    2.176000] sisfb 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x3030
[    2.180000] sisfb: Video ROM not found
[    2.184000] sisfb: Video RAM at 0x40000000, mapped to 0x9000000040000000, size 32768k
[    2.188000] sisfb: MMIO at 0x50000000, mapped to 0x9000000050000000, size 256k
[    2.192000] sisfb: Memory heap starting at 32160K, size 32K
[    3.472000] sisfb: Detected SiS301C video bridge
[    3.556000] sisfb: Detected 1280x1024 flat panel
[    3.636000] sisfb: CRT2 DDC supported
[    3.640000] sisfb: CRT2 DDC level: 2 
[    3.848000] sisfb: Monitor range H 30-81KHz, V 56-76Hz, Max. dotclock 140MHz
[    3.852000] sisfb: Default mode is 1280x1024x8 (60Hz)
[    3.856000] sisfb: Initial vbflags 0x10000022
[    3.928000] Console: switching to colour frame buffer device 160x64
[    3.984000] sisfb: 2D acceleration is enabled, y-panning enabled (auto-max)
[    3.988000] fb0: SiS 315PRO frame buffer device version 1.8.9
[    3.992000] sisfb: Copyright (C) 2001-2005 Thomas Winischhofer
[    4.048000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    4.192000] printk: console [ttyS0] disabled
[    4.200000] serial8250.0: ttyS0 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[    4.204000] printk: console [ttyS0] enabled
[    4.208000] printk: bootconsole [early0] disabled
[    4.820000] brd: module loaded
[    4.932000] loop: module loaded
[    5.052000] random: crng init done
[    5.372000] scsi host0: pata_cs5536
[    5.664000] scsi host1: pata_cs5536
[    5.672000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
[    5.680000] ata2: DUMMY
[    5.684000] slot: 6, pin: 1, irq: 36
[    5.688000] r8169 0000:00:06.0: not PCI Express
[    5.696000] libphy: r8169: probed
[    5.704000] r8169 0000:00:06.0 eth0: RTL8169sc/8110sc, 00:23:9e:00:0f:54, XID 98000000, IRQ 36
[    5.708000] r8169 0000:00:06.0 eth0: jumbo features [frames: 7152 bytes, tx checksumming: ok]
[    5.712000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.716000] ehci-pci: EHCI PCI platform driver
[    5.720000] ehci-pci 0000:00:0e.5: EHCI Host Controller
[    5.724000] ehci-pci 0000:00:0e.5: new USB bus registered, assigned bus number 1
[    5.728000] ehci-pci 0000:00:0e.5: irq 11, io mem 0x50071000
[    5.920000] irq 14: nobody cared (try booting with the "irqpoll" option)
[    5.920000] CPU: 0 PID: 568 Comm: hotplug Not tainted 4.20.0-lemote-los_42599+ #1
[    5.920000] Stack : 00000000000000a4 00000000000000a5 ffffffffcfffffff 980000009f023d78
[    5.920000]         576a98c906c11500 0000000000000000 0000000000000000 ffffffff81a40000
[    5.920000]         00000000000000a5 0000000000000007 0000000000000000 ffffffff806d7388
[    5.920000]         0000000000000000 0000000000000004 0000000000000002 980000009fb42e50
[    5.920000]         9000000040121b08 ffffffff80790000 ffffff0000000000 000000000000000e
[    5.920000]         0000000000000003 0000000000000000 0000000000000000 0000000000000000
[    5.920000]         0000000000000000 ffffffffffffffff 9000000040121b0c 0000000000000000
[    5.920000]         ffffffff80a10000 980000009fc30000 980000009f023d70 0000000000000000
[    5.920000]         ffffffff80262a38 0000000000000000 0000000000000000 0000000000000000
[    5.920000]         0000000000000000 576a98c906c11500 ffffffff8020f504 576a98c906c11500
[    5.920000]         ...
[    5.920000] Call Trace:
[    5.920000] [<ffffffff8020f504>] show_stack+0x90/0x140
[    5.920000] [<ffffffff80262a38>] __report_bad_irq+0x44/0xf4
[    5.920000] [<ffffffff80262ddc>] note_interrupt+0x274/0x318
[    5.920000] [<ffffffff8025fec4>] handle_irq_event_percpu+0x60/0x9c
[    5.920000] [<ffffffff8025ff3c>] handle_irq_event+0x3c/0x70
[    5.920000] [<ffffffff80263f78>] handle_level_irq+0x10c/0x148
[    5.920000] [<ffffffff8025f498>] generic_handle_irq+0x34/0x50
[    5.920000] [<ffffffff806a9ab8>] do_IRQ+0x18/0x24
[    5.920000] [<ffffffff80208ec4>] handle_int+0x17c/0x188
[    5.920000] handlers:
[    5.920000] [<000000004cce36f4>] ata_bmdma_interrupt
[    5.920000] Disabling IRQ #14
[    6.144000] ehci-pci 0000:00:0e.5: USB 0.0 started, EHCI 1.00
[    6.148000] hub 1-0:1.0: USB hub found
[    6.160000] hub 1-0:1.0: 4 ports detected
[    6.168000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    6.172000] ohci-pci: OHCI PCI platform driver
[    6.176000] ohci-pci 0000:00:0e.4: OHCI PCI host controller
[    6.180000] ohci-pci 0000:00:0e.4: new USB bus registered, assigned bus number 2
[    6.184000] ohci-pci 0000:00:0e.4: irq 11, io mem 0x50070000
[    6.280000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
[    6.284000] ata1.00: 312581808 sectors, multi 16: LBA48 
[    6.288000] ata1.00: limited to UDMA/33 due to 40-wire cable
[    6.292000] hub 2-0:1.0: USB hub found
[    6.304000] hub 2-0:1.0: 4 ports detected
[    6.312000] usbcore: registered new interface driver usb-storage
[    6.316000] loongson2_cpufreq: Loongson-2F CPU frequency driver
[    6.320000] usbcore: registered new interface driver usbhid
[    6.324000] usbhid: USB HID core driver
[    6.328000] NET: Registered protocol family 17
[    6.356000] scsi 0:0:0:0: Direct-Access     ATA      WDC WD1600BEVS-0 1A11 PQ: 0 ANSI: 5
[    6.404000] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    6.432000] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB)
[    6.444000] sd 0:0:0:0: [sda] Write Protect is off
[    6.448000] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    6.448000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    6.668000]  sda: sda1
[    6.676000] sd 0:0:0:0: [sda] Attached SCSI disk
[    6.688000] Freeing unused kernel memory: 2048K
[    6.692000] This architecture does not have kernel memory protection.
[    6.696000] Run /init as init process
[   37.036000] EXT4-fs (sda1): mounting ext3 file system using the ext4 subsystem
[   38.184000] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[   65.600000] RTL8211B Gigabit Ethernet r8169-30:00: attached PHY driver [RTL8211B Gigabit Ethernet] (mii_bus:phy_addr=r8169-30:00, irq=IGNORE)
[   68.280000] r8169 0000:00:06.0 eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[   76.244000] Adding 524256k swap on /SWAP.  Priority:-2 extents:13 across:145760016k 

-----

A.

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: Loongson 2F IDE/ATA broken with lemote2f_defconfig
  2019-01-26 18:43     ` Aaro Koskinen
@ 2019-02-07 15:02       ` Bartlomiej Zolnierkiewicz
  2019-05-14 20:01         ` Aaro Koskinen
  0 siblings, 1 reply; 6+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2019-02-07 15:02 UTC (permalink / raw)
  To: Aaro Koskinen; +Cc: linux-mips, Jens Axboe, linux-ide


On 01/26/2019 07:43 PM, Aaro Koskinen wrote:
> Hi,
> 
> On Mon, Jan 14, 2019 at 02:16:42PM +0100, Bartlomiej Zolnierkiewicz wrote:
>> On 01/12/2019 04:26 PM, Aaro Koskinen wrote:
>>> Hi,
>>>
>>> On Sun, Jan 06, 2019 at 02:46:07PM +0200, Aaro Koskinen wrote:
>>>> Commit 7ff7a5b1bfff ("MIPS: lemote2f_defconfig: Convert to use libata
>>>> PATA drivers") switched from IDE to libata PATA on Loongson 2F, but
>>>> neither PATA_AMD or PATA_CS5536 work well on this platform compared
>>>> to the AMD74XX IDE driver.
>>
>> Sorry about that.
>>
>>>> During the ATA init/probe there is interrupt storm from irq 14, and
>>>> majority of system boots end up with "nobody cared... IRQ disabled".
>>>> So the result is a very slow disk access.
>>>>
>>>> It seems that the interrupt gets crazy after the port freeze done early
>>>> during the init, and for whatever reason it cannot be cleared.
>>>>
>>>> With the below workaround I was able to boot the system normally. I
>>>> guess that rather than going back to old IDE driver, we should just try
>>>> to make pata_cs5536 work (and forget PATA AMD on this board)...?
>>>
>>> Hmm, even with this hack I get ~500 spurious IRQs during the boot.
>>>
>>> Also compared to old IDE, there's 33 vs 100 speed difference:
>>>
>>> [    3.324000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
>>> [    3.584000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
>>> [    3.588000] ata1.00: 312581808 sectors, multi 16: LBA48
>>> [    3.592000] ata1.00: limited to UDMA/33 due to 40-wire cable
>>>
>>> [    4.540000] Probing IDE interface ide0...
>>> [    4.992000] hda: WDC WD1600BEVS-00VAT0, ATA DISK drive
>>> [    5.716000] hda: host max PIO5 wanted PIO255(auto-tune) selected PIO4
>>> [    5.716000] hda: UDMA/100 mode selected
>>
>> Can you try booting with "libata.force=1:80c" (and if that doesn't work with
>> "libata.force=1:short40c")
> 
> (Sorry for delay, this machine is in use so I couldn't reboot it randomly...)
> 
> OK, the speed issue can be fixed with command line. So "libata.force=1:80c"
> works with cs5536 libata driver.
> 
>> and also provide full dmesg-s for working (ide) and not working
>> (libata) kernels.
> 
> Logs are below:
> 
> 1) working IDE (no spurious IRQs)
> 2) working PATA AMD (around ~90k spurious IRQs, so it's just a matter of luck)
> 3) failing PATA AMD (100k spurious IRQs reached)
> 4) working PATA CS5536 (same as with PATA AMD)
> 5) failing PATA CS5536 (same as with PATA AMD)

Thank you.

I've looked a bit more into the problem and came with two possible
approaches to investigate it further:

* The major difference between IDE and libata during probing is that
  IDE keeps the port's IRQ (if known) disabled during whole probe time.

  To replicate this behavior in libata it seems that we would need
  to cache IRQ number used in ap->irq, then call disable_irq(ap->irq)
  when ATA_PFLAG_LOADING flag is set and enable_irq(ap->irq) when
  ATA_PFLAG_LOADING is cleared.

* The other idea is to try to modify your workaround patch to implement
  dummy ->sff_set_devctl helper ("empty" one) instead of adding custom
  version of ->freeze one.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: Loongson 2F IDE/ATA broken with lemote2f_defconfig
  2019-02-07 15:02       ` Bartlomiej Zolnierkiewicz
@ 2019-05-14 20:01         ` Aaro Koskinen
  0 siblings, 0 replies; 6+ messages in thread
From: Aaro Koskinen @ 2019-05-14 20:01 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz; +Cc: linux-mips, Jens Axboe, linux-ide

Hi,

On Thu, Feb 07, 2019 at 04:02:11PM +0100, Bartlomiej Zolnierkiewicz wrote:
> On 01/26/2019 07:43 PM, Aaro Koskinen wrote:
> > On Mon, Jan 14, 2019 at 02:16:42PM +0100, Bartlomiej Zolnierkiewicz wrote:
> >> On 01/12/2019 04:26 PM, Aaro Koskinen wrote:
> >>> Hi,
> >>>
> >>> On Sun, Jan 06, 2019 at 02:46:07PM +0200, Aaro Koskinen wrote:
> >>>> Commit 7ff7a5b1bfff ("MIPS: lemote2f_defconfig: Convert to use libata
> >>>> PATA drivers") switched from IDE to libata PATA on Loongson 2F, but
> >>>> neither PATA_AMD or PATA_CS5536 work well on this platform compared
> >>>> to the AMD74XX IDE driver.
> >>
> >> Sorry about that.
> >>
> >>>> During the ATA init/probe there is interrupt storm from irq 14, and
> >>>> majority of system boots end up with "nobody cared... IRQ disabled".
> >>>> So the result is a very slow disk access.
> >>>>
> >>>> It seems that the interrupt gets crazy after the port freeze done early
> >>>> during the init, and for whatever reason it cannot be cleared.
> >>>>
> >>>> With the below workaround I was able to boot the system normally. I
> >>>> guess that rather than going back to old IDE driver, we should just try
> >>>> to make pata_cs5536 work (and forget PATA AMD on this board)...?
> >>>
> >>> Hmm, even with this hack I get ~500 spurious IRQs during the boot.
> >>>
> >>> Also compared to old IDE, there's 33 vs 100 speed difference:
> >>>
> >>> [    3.324000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
> >>> [    3.584000] ata1.00: ATA-8: WDC WD1600BEVS-00VAT0, 11.01A11, max UDMA/133
> >>> [    3.588000] ata1.00: 312581808 sectors, multi 16: LBA48
> >>> [    3.592000] ata1.00: limited to UDMA/33 due to 40-wire cable
> >>>
> >>> [    4.540000] Probing IDE interface ide0...
> >>> [    4.992000] hda: WDC WD1600BEVS-00VAT0, ATA DISK drive
> >>> [    5.716000] hda: host max PIO5 wanted PIO255(auto-tune) selected PIO4
> >>> [    5.716000] hda: UDMA/100 mode selected
> >>
> >> Can you try booting with "libata.force=1:80c" (and if that doesn't work with
> >> "libata.force=1:short40c")
> > 
> > (Sorry for delay, this machine is in use so I couldn't reboot it randomly...)
> > 
> > OK, the speed issue can be fixed with command line. So "libata.force=1:80c"
> > works with cs5536 libata driver.
> > 
> >> and also provide full dmesg-s for working (ide) and not working
> >> (libata) kernels.
> > 
> > Logs are below:
> > 
> > 1) working IDE (no spurious IRQs)
> > 2) working PATA AMD (around ~90k spurious IRQs, so it's just a matter of luck)
> > 3) failing PATA AMD (100k spurious IRQs reached)
> > 4) working PATA CS5536 (same as with PATA AMD)
> > 5) failing PATA CS5536 (same as with PATA AMD)
> 
> Thank you.
> 
> I've looked a bit more into the problem and came with two possible
> approaches to investigate it further:
> 
> * The major difference between IDE and libata during probing is that
>   IDE keeps the port's IRQ (if known) disabled during whole probe time.
> 
>   To replicate this behavior in libata it seems that we would need
>   to cache IRQ number used in ap->irq, then call disable_irq(ap->irq)
>   when ATA_PFLAG_LOADING flag is set and enable_irq(ap->irq) when
>   ATA_PFLAG_LOADING is cleared.

Since IDE driver is now officially deprecated, I got some motivation to
start trying to fix this. I tried the above approach, but it does not work
very well - I still get around 50000 spurious IRQs.

If I move disable_irq() earlier (from __ata_port_probe() into
ata_pci_sff_activate_host()), it works better with only 20 spurious IRQs.

But, keeping the IRQ disabled during probe seems to result in the
following:

[    4.956000] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4ce0 irq 14
[    4.960000] ata2: DUMMY
[   10.328000] ata1.00: qc timeout (cmd 0x27)
[   10.332000] ata1.00: failed to read native max address (err_mask=0x4)
[   10.336000] ata1.00: HPA support seems broken, skipping HPA handling

> * The other idea is to try to modify your workaround patch to implement
>   dummy ->sff_set_devctl helper ("empty" one) instead of adding custom
>   version of ->freeze one.

This works, but also still results in around 50000 spurious IRQs... So
the risk is that the 100000 limit is could be reached if the ATA probe
gets delayed by other subsystems.

A.

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, back to index

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-06 12:46 Loongson 2F IDE/ATA broken with lemote2f_defconfig Aaro Koskinen
2019-01-12 15:26 ` Aaro Koskinen
2019-01-14 13:16   ` Bartlomiej Zolnierkiewicz
2019-01-26 18:43     ` Aaro Koskinen
2019-02-07 15:02       ` Bartlomiej Zolnierkiewicz
2019-05-14 20:01         ` Aaro Koskinen

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