On 2/5/21 4:40 AM, Jason Wang wrote:

On 2021/2/4 下午7:15, Adrian Moreno wrote:

quoted

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:

quoted

On 2021/2/2 下午6:35, Parav Pandit wrote:

quoted

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?

quoted

quoted

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Create a vdpa device of type networking named as "foo2" from
the management device vdpasim_net:

$ vdpa dev add mgmtdev vdpasim_net name foo2

I guess this command will accept a 'type' parameter once more supported_classes
are added?

This could be extended in the future.

quoted

Also, will this tool also handle the vdpa driver binding or will the user handle
that through the vdpa bus' sysfs interface?

I think not, it's the configuration below the vdpa bus. The sysfs should be the
only interface for managing driver binding.

Understood, thanks.

-- 
Adrián Moreno

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