On Mon, 2024-07-22 at 15:48 +0800, Jason Wang wrote:
> On Mon, Jul 22, 2024 at 9:06 AM Cindy Lu <lulu@xxxxxxxxxx> 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@xxxxxxxxxx>
> > ---
> > 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;
Reverse xmas tree?
> > + int err = -EOPNOTSUPP;
> > +
> > + mvdev = to_mvdev(dev);
> > + ndev = to_mlx5_vdpa_ndev(mvdev);
> > + mdev = mvdev->mdev;
> > + config = &ndev->config;
> > +
You still need to take the ndev->reslock.
> > + 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);
What is the expected behaviour when the device is in use?
> > + }
> > + 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
> >
>
Thanks,
Dragos
