Re: [PATCH v4 00/21] PCI: fix config space memory mappings

[Khuong Dinh <kdinh@apm.com>]

Hi,
  They're same before and after applying the patch.
  It was tested with X-Gene 1 and X-Gene 2 with DT (Device Tree) and ACPI boot.

  X-Gene 1 - DT :
[root@(none) ~]# lspci -s 01:00.0 -v
01:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
        Subsystem: Intel Corporation Gigabit CT Desktop Adapter
        Flags: bus master, fast devsel, latency 0, IRQ 68
        Memory at e1800c0000 (32-bit, non-prefetchable) [size=128K]
        Memory at e180000000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at 1000 [disabled] [size=32]
        Memory at e1800e0000 (32-bit, non-prefetchable) [size=16K]
        Expansion ROM at e180080000 [disabled] [size=256K]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [e0] Express Endpoint, MSI 00
        Capabilities: [a0] MSI-X: Enable+ Count=5 Masked-
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-4f-68-3d
        Kernel driver in use: e1000e

  X-Gene 1 - ACPI :
[root@(none) ~]# lspci -s 01:00.0 -v
01:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
        Subsystem: Intel Corporation Gigabit CT Desktop Adapter
        Flags: bus master, fast devsel, latency 0, IRQ 117
        Memory at e0400c0000 (32-bit, non-prefetchable) [size=128K]
        Memory at e040000000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at 1000 [disabled] [size=32]
        Memory at e0400e0000 (32-bit, non-prefetchable) [size=16K]
        Expansion ROM at e040080000 [disabled] [size=256K]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [e0] Express Endpoint, MSI 00
        Capabilities: [a0] MSI-X: Enable- Count=5 Masked-
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-4f-68-3d
        Kernel driver in use: e1000e

 X-Gene 2 - DT :
[root@(none) ~]# lspci -s 0000:01:00.0 -v
0000:01:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit
Ethernet Controller (Copper) (rev 06)
        Subsystem: Intel Corporation PRO/1000 PT Desktop Adapter
        Flags: bus master, fast devsel, latency 0, IRQ 49
        Memory at c120000000 (32-bit, non-prefetchable) [size=128K]
        Memory at c120020000 (32-bit, non-prefetchable) [size=128K]
        I/O ports at 1000 [disabled] [size=32]
        Expansion ROM at c120040000 [disabled] [size=128K]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [e0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-1e-84-4e
        Kernel driver in use: e1000e

 X-Gene 2 - ACPI :
[root@(none) ~]# lspci -s 0000:01:00.0 -v
0000:01:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit
Ethernet Controller (Copper) (rev 06)
        Subsystem: Intel Corporation PRO/1000 PT Desktop Adapter
        Flags: bus master, fast devsel, latency 0, IRQ 93
        Memory at c040000000 (32-bit, non-prefetchable) [size=128K]
        Memory at c040020000 (32-bit, non-prefetchable) [size=128K]
        I/O ports at 1000 [disabled] [size=32]
        Expansion ROM at c040040000 [disabled] [size=128K]
        Capabilities: [c8] Power Management version 2
        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [e0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-1e-84-4e
        Kernel driver in use: e1000e

Best regards,
Khuong Dinh

On Wed, Apr 26, 2017 at 6:46 PM, Dongdong Liu <liudongdong3@huawei.com> wrote:
>
>
> 在 2017/4/27 1:24, Jingoo Han 写道:
>>
>> On Wednesday, April 26, 2017 6:54 AM, Dongdong Liu wrote;
>>>
>>>
>>> Tested-by: Dongdong Liu <liudongdong3@huawei.com>
>>>
>>> I tested the patchset on HiSilicon ARM64 D05 board.It works ok with 82599
>>> netcard.
>>
>>
>> Thank you for testing these patches. HiSilicon PCIe may use
>> Designware-based
>> PCIe controller. In my opinion, other Designware-based PCIe controller
>> will
>> work properly.
>>
>> To Dongdong Liu, Khuong Dinh, and other people,
>> If possible, can you check the output of 'lspci -v'?
>> If you find something different, please share it with us.
>> Good luck.
>
>
> root@(none)$ ./lspci -v
> 0002:80:00.0 Class 0604: Device 19e5:1610 (rev 01)
>         Flags: bus master, fast devsel, latency 0
>         Memory at a9e00000 (32-bit, non-prefetchable) [size=64K]
>         Bus: primary=80, secondary=81, subordinate=82, sec-latency=0
>         I/O behind bridge: 00000000-00001fff
>         Memory behind bridge: a8800000-a8ffffff
>         Prefetchable memory behind bridge: 00000000a9000000-00000000a9dfffff
>         Capabilities: [40] Power Management version 3
>         Capabilities: [50] MSI: Enable- Count=1/32 Maskable+ 64bit+
>         Capabilities: [70] Express Root Port (Slot-), MSI 00
>         Capabilities: [100] Advanced Error Reporting
>         Capabilities: [158] #19
>         Capabilities: [178] #17
>         Kernel driver in use: pcieport
>
> 0002:81:00.0 Class 0200: Device 8086:10fb (rev 01)
>         Flags: bus master, fast devsel, latency 0, IRQ 255
>         Memory at a9000000 (64-bit, prefetchable) [size=4M]
>         I/O ports at 1000 [disabled] [size=32]
>         Memory at a9800000 (64-bit, prefetchable) [size=16K]
>         Expansion ROM at a8800000 [disabled] [size=4M]
>         Capabilities: [40] Power Management version 3
>         Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
>         Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
>         Capabilities: [a0] Express Endpoint, MSI 00
>         Capabilities: [e0] Vital Product Data
>         Capabilities: [100] Advanced Error Reporting
>         Capabilities: [140] Device Serial Number 9c-37-f4-ff-ff-7b-5b-a0
>         Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
>         Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
>         Kernel driver in use: ixgbe
>
> 0002:81:00.1 Class 0200: Device 8086:10fb (rev 01)
>         Flags: bus master, fast devsel, latency 0, IRQ 255
>         Memory at a9400000 (64-bit, prefetchable) [size=4M]
>         I/O ports at 1020 [disabled] [size=32]
>         Memory at a9a04000 (64-bit, prefetchable) [size=16K]
>         Expansion ROM at a8c00000 [disabled] [size=4M]
>         Capabilities: [40] Power Management version 3
>         Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
>         Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
>         Capabilities: [a0] Express Endpoint, MSI 00
>         Capabilities: [e0] Vital Product Data
>         Capabilities: [100] Advanced Error Reporting
>         Capabilities: [140] Device Serial Number 9c-37-f4-ff-ff-7b-5b-a0
>         Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
>         Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
>         Kernel driver in use: ixgbe
>
> 0004:88:00.0 Class 0604: Device 19e5:1610 (rev 01)
>         Flags: bus master, fast devsel, latency 0
>         Memory at 8a9000000 (32-bit, non-prefetchable) [size=64K]
>         Bus: primary=88, secondary=89, subordinate=89, sec-latency=0
>         Capabilities: [40] Power Management version 3
>         Capabilities: [50] MSI: Enable- Count=1/32 Maskable+ 64bit+
>         Capabilities: [70] Express Root Port (Slot-), MSI 00
>         Capabilities: [100] Advanced Error Reporting
>         Capabilities: [158] #19
>         Capabilities: [178] #17
>         Kernel driver in use: pcieport
>
> Thanks,
> Dongdong
>>
>>
>> Best regards,
>> Jingoo Han
>>
>>>
>>> Thanks,
>>> Dongdong
>>> 在 2017/4/25 14:40, Jon Masters 写道:
>>>>
>>>> On 04/19/2017 12:48 PM, Lorenzo Pieralisi wrote:
>>>>
>>>>> On some platforms (ie ARM/ARM64) ioremap fails to comply with the PCI
>>>>> configuration non-posted write transactions requirement, because it
>>>>> provides a memory mapping that issues "bufferable" or, in PCI terms
>>>>> "posted" write transactions. Likewise, the current pci_remap_iospace()
>>>>> implementation maps the physical address range that the PCI translates
>>>>> to I/O space cycles to virtual address space through pgprot_device()
>>>>> attributes that on eg ARM64 provides a memory mapping issuing
>>>>> posted writes transactions, which is not PCI specifications compliant.
>>>>
>>>>
>>>> Side note that I've pinged all of the ARM server vendors and asked them
>>>> to verify this patch series on their platforms.
>>>>
>>>> Jon.
>>>>
>>>> .
>>>>
>>
>> .
>>
>

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