net/mlx5: E-Switch, Enable vport metadata matching if firmware supports it

As the ingress ACL rules save vhca id and vport number to packet's
metadata REG_C_0, and the metadata matching for the rules in both fast
path and slow path are all added, enable this feature if supported.
Signed-off-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c

@@ -1904,12 +1904,35 @@ static int esw_vport_ingress_common_config(struct mlx5_eswitch *esw,
 	return err;
 }
 
+static bool
+esw_check_vport_match_metadata_supported(const struct mlx5_eswitch *esw)
+{
+	if (!MLX5_CAP_ESW(esw->dev, esw_uplink_ingress_acl))
+		return false;
+
+	if (!(MLX5_CAP_ESW_FLOWTABLE(esw->dev, fdb_to_vport_reg_c_id) &
+	      MLX5_FDB_TO_VPORT_REG_C_0))
+		return false;
+
+	if (!MLX5_CAP_ESW_FLOWTABLE(esw->dev, flow_source))
+		return false;
+
+	if (mlx5_core_is_ecpf_esw_manager(esw->dev) ||
+	    mlx5_ecpf_vport_exists(esw->dev))
+		return false;
+
+	return true;
+}
+
 static int esw_create_offloads_acl_tables(struct mlx5_eswitch *esw)
 {
 	struct mlx5_vport *vport;
 	int i, j;
 	int err;
 
+	if (esw_check_vport_match_metadata_supported(esw))
+		esw->flags |= MLX5_ESWITCH_VPORT_MATCH_METADATA;
+
 	mlx5_esw_for_all_vports(esw, i, vport) {
 		err = esw_vport_ingress_common_config(esw, vport);
 		if (err)