linux-kernel - Re: [PATH v4 3/3] vdpa/mlx5: Add the support of set mac address

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Message-ID: <CACGkMEvXk8_sXRtugePAMv8PM0qGU-su0eFUsFZ=-=_TjcGZNg@mail.gmail.com>
Date: Mon, 22 Jul 2024 15:48:44 +0800
From: Jason Wang <jasowang@...hat.com>
To: Cindy Lu <lulu@...hat.com>
Cc: dtatulea@...dia.com, mst@...hat.com, parav@...dia.com, sgarzare@...hat.com, 
	netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATH v4 3/3] vdpa/mlx5: Add the support of set mac address

On Mon, Jul 22, 2024 at 9:06 AM Cindy Lu <lulu@...hat.com> wrote:
>
> Add the function to support setting the MAC address.
> For vdpa/mlx5, the function will use mlx5_mpfs_add_mac
> to set the mac address
>
> Tested in ConnectX-6 Dx device
>
> Signed-off-by: Cindy Lu <lulu@...hat.com>
> ---
>  drivers/vdpa/mlx5/net/mlx5_vnet.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> index ecfc16151d61..415b527a9c72 100644
> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> @@ -3785,10 +3785,35 @@ static void mlx5_vdpa_dev_del(struct vdpa_mgmt_dev *v_mdev, struct vdpa_device *
>         destroy_workqueue(wq);
>         mgtdev->ndev = NULL;
>  }
> +static int mlx5_vdpa_set_attr(struct vdpa_mgmt_dev *v_mdev,
> +                             struct vdpa_device *dev,
> +                             const struct vdpa_dev_set_config *add_config)
> +{
> +       struct mlx5_vdpa_dev *mvdev;
> +       struct mlx5_vdpa_net *ndev;
> +       struct mlx5_core_dev *mdev;
> +       struct virtio_net_config *config;
> +       struct mlx5_core_dev *pfmdev;
> +       int err = -EOPNOTSUPP;
> +
> +       mvdev = to_mvdev(dev);
> +       ndev = to_mlx5_vdpa_ndev(mvdev);
> +       mdev = mvdev->mdev;
> +       config = &ndev->config;
> +
> +       if (add_config->mask & (1 << VDPA_ATTR_DEV_NET_CFG_MACADDR)) {
> +               pfmdev = pci_get_drvdata(pci_physfn(mdev->pdev));
> +               err = mlx5_mpfs_add_mac(pfmdev, config->mac);
> +               if (!err)
> +                       memcpy(config->mac, add_config->net.mac, ETH_ALEN);
> +       }
> +       return err;

Similar to net simulator, how could be serialize the modification to
mac address:

1) from vdpa tool
2) via control virtqueue

Thanks

> +}
>
>  static const struct vdpa_mgmtdev_ops mdev_ops = {
>         .dev_add = mlx5_vdpa_dev_add,
>         .dev_del = mlx5_vdpa_dev_del,
> +       .dev_set_attr = mlx5_vdpa_set_attr,
>  };
>
>  static struct virtio_device_id id_table[] = {
> --
> 2.45.0
>