lkml.org 
[lkml]   [2019]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] PCI: Add quirk to disable unused BAR for hisilicon NP devices 5896
From
Date
Hi Andrew,
Thanks for your advice. I will change them and send another version.

Thanks,
Xiongfeng

On 2019/12/5 20:15, Andrew Murray wrote:
> On Thu, Dec 05, 2019 at 07:40:41PM +0800, Xiongfeng Wang wrote:
>> Add pci quirk for hisilicon PCI Network Processor devices 5896.
>
> Can you capatalise HiSilicon correctly (capital H and S), both here and
> in the subject line?
>
> s/devices 5896/5896 devices/ ?
>
>> The size of the unused BAR3 is set as 265T wrongly. This patch disalbes
>
> s/disalbes/disables/
>
>> this bar.
>>
>> Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
>> ---
>> drivers/pci/quirks.c | 29 +++++++++++++++++++++++++++++
>> include/linux/pci_ids.h | 1 +
>> 2 files changed, 30 insertions(+)
>>
>> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
>> index 4937a08..7dfb272 100644
>> --- a/drivers/pci/quirks.c
>> +++ b/drivers/pci/quirks.c
>> @@ -5431,3 +5431,32 @@ static void quirk_reset_lenovo_thinkpad_p50_nvgpu(struct pci_dev *pdev)
>> DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
>> PCI_CLASS_DISPLAY_VGA, 8,
>> quirk_reset_lenovo_thinkpad_p50_nvgpu);
>> +
>> +static void quirk_hisi_fixup_np_class(struct pci_dev *pdev)
>> +{
>> + u32 class = pdev->class;
>> +
>> + pdev->class = PCI_BASE_CLASS_NETWORK << 8;
>> + pci_info(pdev, "PCI class overriden (%#08x -> %#08x)\n",
>> + class, pdev->class);
>
> Why is this in here? This is completely unrelated to the commit message.
>
>> +}
>> +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HISI_5896,
>> + quirk_hisi_fixup_np_class);
>> +
>> +/*
>> + * Hisilicon NP devices 5896 BAR3 size is misreported as 256T. Actually, this
>> + * BAR is unused, so let's disable it.
>
> Does this mean that the existing driver doesn't use this BAR? Is a better fix
> up the BAR to report the correct size?
>
>
>> + */
>> +#define HISI_5896_WRONG_BAR 3
>
> I'd suggest this define is possibly not required.
>
>> +static void quirk_hisi_fixup_np_bar(struct pci_dev *pdev)
>> +{
>> + struct resource *r = &pdev->resource[HISI_5896_WRONG_BAR];
>> +
>> + r->start = 0;
>> + r->end = 0;
>> + r->flags = 0;
>> +
>> + pci_info(pdev, "disable BAR %d\n", HISI_5896_WRONG_BAR);
>
> It might be more helpful to describe why, e.g. "Disabling invalid BAR 3"
> or similar.
>
>
>> +}
>> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HISI_5896,
>> + quirk_hisi_fixup_np_bar);
>> diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
>> index 2302d133..56e2b91 100644
>> --- a/include/linux/pci_ids.h
>> +++ b/include/linux/pci_ids.h
>> @@ -2558,6 +2558,7 @@
>> #define PCI_DEVICE_ID_KORENIX_JETCARDF3 0x17ff
>>
>> #define PCI_VENDOR_ID_HUAWEI 0x19e5
>> +#define PCI_DEVICE_ID_HISI_5896 0x5896 /* Hisilicon NP devices 5896 */
>>
>> #define PCI_VENDOR_ID_NETRONOME 0x19ee
>> #define PCI_DEVICE_ID_NETRONOME_NFP4000 0x4000
>
> Thanks,
>
> Andrew Murray
>
>> --
>> 1.7.12.4
>>
>
> .
>

\
 
 \ /
  Last update: 2019-12-05 13:25    [W:0.034 / U:2.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site