On Mon, 8 Jul 2024 at 15:06, Jason Wang <jasowang@xxxxxxxxxx> wrote:
>
> On Mon, Jul 8, 2024 at 2:48 PM Cindy Lu <lulu@xxxxxxxxxx> wrote:
> >
> > Add the function to support setting the MAC address.
> > For vdpa_sim_net, the driver will write the MAC address
> > to the config space, and other devices can implement
> > their own functions to support this.
> >
> > Signed-off-by: Cindy Lu <lulu@xxxxxxxxxx>
> > ---
> > drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 19 ++++++++++++++++++-
> > 1 file changed, 18 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> > index cfe962911804..a472c3c43bfd 100644
> > --- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> > +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> > @@ -414,6 +414,22 @@ static void vdpasim_net_get_config(struct vdpasim *vdpasim, void *config)
> > net_config->status = cpu_to_vdpasim16(vdpasim, VIRTIO_NET_S_LINK_UP);
> > }
> >
> > +static int vdpasim_net_set_attr(struct vdpa_mgmt_dev *mdev,
> > + struct vdpa_device *dev,
> > + const struct vdpa_dev_set_config *config)
> > +{
> > + struct vdpasim *vdpasim = container_of(dev, struct vdpasim, vdpa);
> > +
> > + struct virtio_net_config *vio_config = vdpasim->config;
> > + if (config->mask & (1 << VDPA_ATTR_DEV_NET_CFG_MACADDR)) {
> > + if (!is_zero_ether_addr(config->net.mac)) {
> > + memcpy(vio_config->mac, config->net.mac, ETH_ALEN);
> > + return 0;
> > + }
> > + }
> > + return -EINVAL;
>
> I think in the previous version, we agreed to have a lock to
> synchronize the writing here?
>
> Thanks
>
Hi Jason
I have moved the down_write(&vdev->cf_lock) and
up_write(&vdev->cf_lock) to the function vdpa_dev_net_device_attr_set
in vdpa/vdpa.c. Then the device itself doesn't need to call it again.
Do you think this is ok?
Thanks
Cindy
> > +}
> > +
> > static void vdpasim_net_setup_config(struct vdpasim *vdpasim,
> > const struct vdpa_dev_set_config *config)
> > {
> > @@ -510,7 +526,8 @@ static void vdpasim_net_dev_del(struct vdpa_mgmt_dev *mdev,
> >
> > static const struct vdpa_mgmtdev_ops vdpasim_net_mgmtdev_ops = {
> > .dev_add = vdpasim_net_dev_add,
> > - .dev_del = vdpasim_net_dev_del
> > + .dev_del = vdpasim_net_dev_del,
> > + .dev_set_attr = vdpasim_net_set_attr
> > };
> >
> > static struct virtio_device_id id_table[] = {
> > --
> > 2.45.0
> >
>
