netdev - Re: [PATCH] vdpa/mlx5: Add the support of set mac address

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Message-ID: <CACLfguV5CXMs9AdWrN9a=st5PjUnT4B1bt2Uua=AYjuC0NwfNg@mail.gmail.com>
Date: Tue, 9 Jul 2024 15:36:48 +0800
From: Cindy Lu <lulu@...hat.com>
To: Dragos Tatulea <dtatulea@...dia.com>
Cc: 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>, "mst@...hat.com" <mst@...hat.com>, 
	"jasowang@...hat.com" <jasowang@...hat.com>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH] vdpa/mlx5: Add the support of set mac address

On Mon, 8 Jul 2024 at 15:27, Dragos Tatulea <dtatulea@...dia.com> wrote:
>
> On Mon, 2024-07-08 at 14:55 +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 | 23 +++++++++++++++++++++++
> >  1 file changed, 23 insertions(+)
> >
> > diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > index 26ba7da6b410..f78701386690 100644
> > --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> > @@ -3616,10 +3616,33 @@ 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_mac(struct vdpa_mgmt_dev *v_mdev,
> > +                               struct vdpa_device *dev,
> > +                               const struct vdpa_dev_set_config *add_config)
> > +{
> > +     struct mlx5_vdpa_dev *mvdev = to_mvdev(dev);
> > +     struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
> > +     struct mlx5_core_dev *mdev = mvdev->mdev;
> > +     struct virtio_net_config *config = &ndev->config;
> > +     int err;
> > +     struct mlx5_core_dev *pfmdev;
> > +
> You need to take the ndev->reslock.
>
thanks will change this
> > +     if (add_config->mask & (1 << VDPA_ATTR_DEV_NET_CFG_MACADDR)) {
> > +             if (!is_zero_ether_addr(add_config->net.mac)) {
> > +                     memcpy(config->mac, add_config->net.mac, ETH_ALEN);
> I would do the memcpy after mlx5_mpfs_add_mac() was called successfully. This
> way the config gets changed only on success.
>
thanks Dragos， Will fix this
thanks
cindy
> > +                     pfmdev = pci_get_drvdata(pci_physfn(mdev->pdev));
> > +                     err = mlx5_mpfs_add_mac(pfmdev, config->mac);
> > +                     if (err)
> > +                             return -1;
> > +             }
> > +     }
> > +     return 0;
> > +}
> >
> >  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_mac,
> >  };
> >
> >  static struct virtio_device_id id_table[] = {
>
> Thanks,
> Dragos
>