net/mlx5: E-Switch: Introduce prio tag mode

Current ConnectX HW is unable to perform VLAN pop in TX path and VLAN
push on RX path. To workaround that limitation untagged packets will be
tagged with VLAN ID 0x000 (priority tag) and pop/push actions will be
replaced by VLAN re-write actions (which are supported by the HW).
Introduce prio tag mode as a pre-step to controlling the workaround
behavior.

Signed-off-by: Eli Britstein <elibr@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 4b37519bd6a5363f566617f2d8e5bf84c767d51b..eeedf3f53ed3cdfa06852c0ca4ca48416b978d1e 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -951,7 +951,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 
        u8         log_max_srq_sz[0x8];
        u8         log_max_qp_sz[0x8];
-       u8         reserved_at_90[0xb];
+       u8         reserved_at_90[0x8];
+       u8         prio_tag_required[0x1];
+       u8         reserved_at_99[0x2];
        u8         log_max_qp[0x5];
 
        u8         reserved_at_a0[0xb];