linux-kernel - Re: [PATCH V4 0/3] vDPA/ifcvf: enables Intel C5000X-PL virtio-blk

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Message-ID: <CAGxU2F622pzZkh8WC7J+jGYu-_ozSDx1Tvvvtw-z52xwC3S38A@mail.gmail.com>
Date:   Wed, 24 Nov 2021 16:39:16 +0100
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     Zhu Lingshan <lingshan.zhu@...el.com>
Cc:     Jason Wang <jasowang@...hat.com>, Michael Tsirkin <mst@...hat.com>,
        Cindy Lu <lulu@...hat.com>,
        Linux Virtualization <virtualization@...ts.linux-foundation.org>,
        netdev <netdev@...r.kernel.org>, kvm <kvm@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Zhu Lingshan <lingshan.zhu@...el.com>
Subject: Re: [PATCH V4 0/3] vDPA/ifcvf: enables Intel C5000X-PL virtio-blk

Hi Zhu,

On Mon, Apr 19, 2021 at 8:39 AM Zhu Lingshan <lingshan.zhu@...el.com> wrote:
>
> This series enabled Intel FGPA SmartNIC C5000X-PL virtio-blk for vDPA.

Looking at the IFCVF upstream vDPA driver (with this series applied), it 
seems that there is still some cleaning to be done to support virtio-blk 
devices:

- ifcvf_vdpa_get_config() and ifcvf_vdpa_set_config() use
  `sizeof(struct virtio_net_config)` to check the inputs.
  This seems wrong for a virtio-blk device. Maybe we can set the config
  size for each device in ifcvf_vdpa_dev_add() and use that field to
  check the inputs. We can reuse the same field also in
  ifcvf_vdpa_get_config_size().

- Just for make the code more readable we should rename `net_cfg` field
  to `device_cfg`in `struct ifcvf_hw`.

What do you think?

Thanks,
Stefano