On 28.08.24 20:16, Carlos Bilbao wrote:
> From: Carlos Bilbao <cbilbao@xxxxxxxxxxxxxxxx>
>
> mlx5_vdpa vDPA devices currently don't support reporting or setting the
> speed and duplex and hence should be UNKNOWN instead of zero.
>
> Signed-off-by: Carlos Bilbao <cbilbao@xxxxxxxxxxxxxxxx>
> ---
> drivers/vdpa/mlx5/net/mlx5_vnet.c | 7 +++++++
> drivers/vdpa/vdpa.c | 23 +++++++++++++++++++++++
> include/uapi/linux/vdpa.h | 2 ++
> 3 files changed, 32 insertions(+)
>
> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> index fa78e8288ebb..319f5c6121de 100644
> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> @@ -3795,6 +3795,13 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,
> init_rwsem(&ndev->reslock);
> config = &ndev->config;
>
> + /*
> + * mlx5_vdpa vDPA devices currently don't support reporting or
> + * setting the speed or duplex.
> + */
> + config->speed = SPEED_UNKNOWN;
> + config->duplex = DUPLEX_UNKNOWN;
> +
The values in virtio_net_config are little endian so you'll need to explicitly
convert them. As speed is a u32, you'll need to add a cpu_to_mlx5vdpa32() helper.
Thanks,
Dragos
> if (add_config->mask & BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MTU)) {
> err = config_func_mtu(mdev, add_config->net.mtu);
> if (err)
> diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
> index 4dbd2e55a288..abde23e0041d 100644
> --- a/drivers/vdpa/vdpa.c
> +++ b/drivers/vdpa/vdpa.c
> @@ -15,6 +15,7 @@
> #include <net/genetlink.h>
> #include <linux/mod_devicetable.h>
> #include <linux/virtio_ids.h>
> +#include <uapi/linux/ethtool.h>
>
> static LIST_HEAD(mdev_head);
> /* A global mutex that protects vdpa management device and device level operations. */
> @@ -919,6 +920,22 @@ static int vdpa_dev_net_status_config_fill(struct sk_buff *msg, u64 features,
> return nla_put_u16(msg, VDPA_ATTR_DEV_NET_STATUS, val_u16);
> }
>
> +static int vdpa_dev_net_speed_config_fill(struct sk_buff *msg, u64 features,
> + struct virtio_net_config *config)
> +{
> + __le32 speed = cpu_to_le32(SPEED_UNKNOWN);
> +
> + return nla_put(msg, VDPA_ATTR_DEV_NET_CFG_SPEED, sizeof(speed), &speed);
> +}
> +
> +static int vdpa_dev_net_duplex_config_fill(struct sk_buff *msg, u64 features,
> + struct virtio_net_config *config)
> +{
> + u8 duplex = DUPLEX_UNKNOWN;
> +
> + return nla_put(msg, VDPA_ATTR_DEV_NET_CFG_DUPLEX, sizeof(duplex), &duplex);
> +}
> +
> static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *msg)
> {
> struct virtio_net_config config = {};
> @@ -941,6 +958,12 @@ static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *ms
> if (vdpa_dev_net_status_config_fill(msg, features_device, &config))
> return -EMSGSIZE;
>
> + if (vdpa_dev_net_speed_config_fill(msg, features_device, &config))
> + return -EMSGSIZE;
> +
> + if (vdpa_dev_net_duplex_config_fill(msg, features_device, &config))
> + return -EMSGSIZE;
> +
> return vdpa_dev_net_mq_config_fill(msg, features_device, &config);
> }
>
> diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h
> index 842bf1201ac4..1c64ee0dd7b1 100644
> --- a/include/uapi/linux/vdpa.h
> +++ b/include/uapi/linux/vdpa.h
> @@ -43,6 +43,8 @@ enum vdpa_attr {
> VDPA_ATTR_DEV_NET_STATUS, /* u8 */
> VDPA_ATTR_DEV_NET_CFG_MAX_VQP, /* u16 */
> VDPA_ATTR_DEV_NET_CFG_MTU, /* u16 */
> + VDPA_ATTR_DEV_NET_CFG_SPEED, /* u32 */
> + VDPA_ATTR_DEV_NET_CFG_DUPLEX, /* u8 */
>
> VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */
> VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u32 */
