net/mlx5e: Replace TC VLAN pop and push actions with VLAN modify

Changing the VLAN header may be implemented by pop the existing header
and push a new one. Translate those operations as VLAN modify.
Applicable for use cases such as OVS where the controller translates a
vlan modify meta (OF) rule to DP pop+push actions rule.
Signed-off-by: Eli Britstein <elibr@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

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

@@ -2664,7 +2664,17 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
 			break;
 		case FLOW_ACTION_VLAN_PUSH:
 		case FLOW_ACTION_VLAN_POP:
-			err = parse_tc_vlan_action(priv, act, attr, &action);
+			if (act->id == FLOW_ACTION_VLAN_PUSH &&
+			    (action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP)) {
+				/* Replace vlan pop+push with vlan modify */
+				action &= ~MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
+				err = add_vlan_rewrite_action(priv,
+							      MLX5_FLOW_NAMESPACE_FDB,
+							      act, parse_attr, hdrs,
+							      &action, extack);
+			} else {
+				err = parse_tc_vlan_action(priv, act, attr, &action);
+			}
 			if (err)
 				return err;