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

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Message-ID: <20240723072712-mutt-send-email-mst@kernel.org>
Date: Tue, 23 Jul 2024 07:29:10 -0400
From: "Michael S. Tsirkin" <mst@...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>,
	"lulu@...hat.com" <lulu@...hat.com>,
	"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, 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.


> 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[] = {
>