netdev - Re: [PATCH iproute2-next v3 0/5] Add vdpa device management tool

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Message-ID: <d056ca1c-8c7f-84ce-dc4a-0105e53c6773@redhat.com>
Date:   Fri, 5 Feb 2021 19:06:09 +0100
From:   Adrian Moreno <amorenoz@...hat.com>
To:     Parav Pandit <parav@...dia.com>, Jason Wang <jasowang@...hat.com>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "dsahern@...il.com" <dsahern@...il.com>,
        "stephen@...workplumber.org" <stephen@...workplumber.org>,
        "mst@...hat.com" <mst@...hat.com>
Subject: Re: [PATCH iproute2-next v3 0/5] Add vdpa device management tool



On 2/5/21 6:53 PM, Parav Pandit wrote:
> 
> 
>> From: Jason Wang <jasowang@...hat.com>
>> Sent: Friday, February 5, 2021 9:11 AM
>>
>>
>> On 2021/2/4 下午7:15, Adrian Moreno wrote:
>>> Sorry I have not followed this work as close as I would have wanted.
>>> Some questions below.
>>>
>>> On 2/4/21 4:16 AM, Jason Wang wrote:
>>>> On 2021/2/2 下午6:35, Parav Pandit wrote:
>>>>> Linux vdpa interface allows vdpa device management functionality.
>>>>> This includes adding, removing, querying vdpa devices.
>>>>>
>>>>> vdpa interface also includes showing supported management devices
>>>>> which support such operations.
>>>>>
>>>>> This patchset includes kernel uapi headers and a vdpa tool.
>>>>>
>>>>> examples:
>>>>>
>>>>> $ vdpa mgmtdev show
>>>>> vdpasim:
>>>>>     supported_classes net
>>>>>
>>>>> $ vdpa mgmtdev show -jp
>>>>> {
>>>>>       "show": {
>>>>>           "vdpasim": {
>>>>>               "supported_classes": [ "net" ]
>>>>>           }
>>>>>       }
>>>>> }
>>>>>
>>> How can a user establish the relationship between a mgmtdev and it's
>>> parent device (pci vf, sf, etc)?
>>
>>
>> Parav should know more but I try to answer.
>>
>> I think there should be BDF information in the mgmtdev show command if
>> the parent is a PCI device, or we can simply show the parent here?
>>
> Yes, it is present in the mgmtdev show command.
> I should have added the example from the kernel cover letter here.
> Link to the kernel cover letter is at 
> 
> An example for real PCI PF,VF,SF device looks like below.
> I will cover below example to the v4 cover letter while addressing David's comment for header file relocation.
> 
> $ vdpa mgmtdev list
> pci/0000:03.00:0
>   supported_classes
>     net
> pci/0000:03.00:4
>   supported_classes
>     net
> auxiliary/mlx5_core.sf.8
>   supported_classes
>     net
> 
> [1] https://lore.kernel.org/netdev/20210105103203.82508-1-parav@nvidia.com/
> 

Thanks Parav

-- 
Adrián Moreno