linux-kernel - Re: [PATH v5 3/3] vdpa/mlx5: Add the support of set mac address

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Message-ID: <CACLfguV53JA9Lk_sTr+ug_x+JDxTr3S3rOcjVQVDy7tkL_B--A@mail.gmail.com>
Date: Wed, 24 Jul 2024 10:12:39 +0800
From: Cindy Lu <lulu@...hat.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Dragos Tatulea <dtatulea@...dia.com>, Parav Pandit <parav@...dia.com>, 
	"sgarzare@...hat.com" <sgarzare@...hat.com>, 
	"virtualization@...ts.linux-foundation.org" <virtualization@...ts.linux-foundation.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>, "jasowang@...hat.com" <jasowang@...hat.com>
Subject: Re: [PATH v5 3/3] vdpa/mlx5: Add the support of set mac address

On Tue, 23 Jul 2024 at 19:29, Michael S. Tsirkin <mst@...hat.com> wrote:
>
> On Tue, Jul 23, 2024 at 07:49:44AM +0000, Dragos Tatulea wrote:
> > On Tue, 2024-07-23 at 13:39 +0800, Cindy Lu 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 | 28 ++++++++++++++++++++++++++++
> > >  1 file changed, 28 insertions(+)
> > >
> > > diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > > index ecfc16151d61..7fce952d650f 100644
> > > --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > > +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > > @@ -3785,10 +3785,38 @@ 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 virtio_net_config *config;
> > > +   struct mlx5_core_dev *pfmdev;
> > > +   struct mlx5_vdpa_dev *mvdev;
> > > +   struct mlx5_vdpa_net *ndev;
> > > +   struct mlx5_core_dev *mdev;
> > > +   int err = -EINVAL;
> > > +
> > > +   mvdev = to_mvdev(dev);
> > > +   ndev = to_mlx5_vdpa_ndev(mvdev);
> > > +   mdev = mvdev->mdev;
> > > +   config = &ndev->config;
> > > +
> > > +   down_write(&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 (0 == err)
> > if (!err) would be nicer. Not a deal breaker though.
>
>         yes, no yodda style please. It, I can not stand.
>
sure， Will fix this
Thanks
cindy
>
> > Reviewed-by: Dragos Tatulea <dtatulea@...dia.com>
> >
> > > +                   memcpy(config->mac, add_config->net.mac, ETH_ALEN);
> > > +   }
> > > +
> > > +   up_write(&ndev->reslock);
> > > +   return err;
> > > +}
> > >
> > >  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[] = {
> >
>