From: Dragos Tatulea dtatulea@nvidia.com
[ Upstream commit 3fe024193340b225d1fd410d78c495434a9d68e0 ]
The standard specifies that the initial number of queues is the default, which is 1 (1 tx, 1 rx).
Signed-off-by: Dragos Tatulea dtatulea@nvidia.com Reviewed-by: Eugenio Pérez eperezma@redhat.com Message-Id: 20230727172354.68243-2-dtatulea@nvidia.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Acked-by: Jason Wang jasowang@redhat.com Tested-by: Lei Yang leiyang@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/vdpa/mlx5/net/mlx5_vnet.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index 279ac6a558d29..93a2520223b66 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -2447,7 +2447,15 @@ static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features) else ndev->rqt_size = 1;
- ndev->cur_num_vqs = 2 * ndev->rqt_size; + /* Device must start with 1 queue pair, as per VIRTIO v1.2 spec, section + * 5.1.6.5.5 "Device operation in multiqueue mode": + * + * Multiqueue is disabled by default. + * The driver enables multiqueue by sending a command using class + * VIRTIO_NET_CTRL_MQ. The command selects the mode of multiqueue + * operation, as follows: ... + */ + ndev->cur_num_vqs = 2;
update_cvq_info(mvdev); return err;