net/mlx5: E-switch, Introduce and use vlan rule config helper

Between legacy mode and switchdev mode, only two fields are changed,
vlan_tag and flow action.
Hence to avoid duplicte code between two modes, introduce and and use
helper function to configure allowed VLAN rule.

While at it, get rid of duplicate debug message.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Vu Pham <vuhuong@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

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

@@ -1328,6 +1328,43 @@ static int esw_vport_ingress_config(struct mlx5_eswitch *esw,
 	return err;
 }
 
+int mlx5_esw_create_vport_egress_acl_vlan(struct mlx5_eswitch *esw,
+					  struct mlx5_vport *vport,
+					  u16 vlan_id, u32 flow_action)
+{
+	struct mlx5_flow_act flow_act = {};
+	struct mlx5_flow_spec *spec;
+	int err = 0;
+
+	if (vport->egress.allowed_vlan)
+		return -EEXIST;
+
+	spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
+	if (!spec)
+		return -ENOMEM;
+
+	MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.cvlan_tag);
+	MLX5_SET_TO_ONES(fte_match_param, spec->match_value, outer_headers.cvlan_tag);
+	MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.first_vid);
+	MLX5_SET(fte_match_param, spec->match_value, outer_headers.first_vid, vlan_id);
+
+	spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
+	flow_act.action = flow_action;
+	vport->egress.allowed_vlan =
+		mlx5_add_flow_rules(vport->egress.acl, spec,
+				    &flow_act, NULL, 0);
+	if (IS_ERR(vport->egress.allowed_vlan)) {
+		err = PTR_ERR(vport->egress.allowed_vlan);
+		esw_warn(esw->dev,
+			 "vport[%d] configure egress vlan rule failed, err(%d)\n",
+			 vport->vport, err);
+		vport->egress.allowed_vlan = NULL;
+	}
+
+	kvfree(spec);
+	return err;
+}
+
 static int esw_vport_egress_config(struct mlx5_eswitch *esw,
 				   struct mlx5_vport *vport)
 {
@@ -1358,34 +1395,17 @@ static int esw_vport_egress_config(struct mlx5_eswitch *esw,
 		  "vport[%d] configure egress rules, vlan(%d) qos(%d)\n",
 		  vport->vport, vport->info.vlan, vport->info.qos);
 
-	spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
-	if (!spec) {
-		err = -ENOMEM;
-		goto out;
-	}
-
 	/* Allowed vlan rule */
-	MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.cvlan_tag);
-	MLX5_SET_TO_ONES(fte_match_param, spec->match_value, outer_headers.cvlan_tag);
-	MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.first_vid);
-	MLX5_SET(fte_match_param, spec->match_value, outer_headers.first_vid, vport->info.vlan);
+	err = mlx5_esw_create_vport_egress_acl_vlan(esw, vport, vport->info.vlan,
+						    MLX5_FLOW_CONTEXT_ACTION_ALLOW);
+	if (err)
+		return err;
 
-	spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
-	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_ALLOW;
-	vport->egress.allowed_vlan =
-		mlx5_add_flow_rules(vport->egress.acl, spec,
-				    &flow_act, NULL, 0);
-	if (IS_ERR(vport->egress.allowed_vlan)) {
-		err = PTR_ERR(vport->egress.allowed_vlan);
-		esw_warn(esw->dev,
-			 "vport[%d] configure egress allowed vlan rule failed, err(%d)\n",
-			 vport->vport, err);
-		vport->egress.allowed_vlan = NULL;
+	/* Drop others rule (star rule) */
+	spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
+	if (!spec)
 		goto out;
-	}
 
-	/* Drop others rule (star rule) */
-	memset(spec, 0, sizeof(*spec));
 	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_DROP;
 
 	/* Attach egress drop flow counter */

drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

@@ -421,6 +421,10 @@ int mlx5_eswitch_del_vlan_action(struct mlx5_eswitch *esw,
 int __mlx5_eswitch_set_vport_vlan(struct mlx5_eswitch *esw,
 				  u16 vport, u16 vlan, u8 qos, u8 set_flags);
 
+int mlx5_esw_create_vport_egress_acl_vlan(struct mlx5_eswitch *esw,
+					  struct mlx5_vport *vport,
+					  u16 vlan_id, u32 flow_action);
+
 static inline bool mlx5_eswitch_vlan_actions_supported(struct mlx5_core_dev *dev,
 						       u8 vlan_depth)
 {

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

@@ -1857,48 +1857,6 @@ void esw_vport_del_ingress_acl_modify_metadata(struct mlx5_eswitch *esw,
 	}
 }
 
-static int esw_vport_egress_prio_tag_config(struct mlx5_eswitch *esw,
-					    struct mlx5_vport *vport)
-{
-	struct mlx5_flow_act flow_act = {0};
-	struct mlx5_flow_spec *spec;
-	int err = 0;
-
-	/* For prio tag mode, there is only 1 FTEs:
-	 * 1) prio tag packets - pop the prio tag VLAN, allow
-	 * Unmatched traffic is allowed by default
-	 */
-	esw_debug(esw->dev,
-		  "vport[%d] configure prio tag egress rules\n", vport->vport);
-
-	spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
-	if (!spec)
-		return -ENOMEM;
-
-	/* prio tag vlan rule - pop it so VF receives untagged packets */
-	MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.cvlan_tag);
-	MLX5_SET_TO_ONES(fte_match_param, spec->match_value, outer_headers.cvlan_tag);
-	MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.first_vid);
-	MLX5_SET(fte_match_param, spec->match_value, outer_headers.first_vid, 0);
-
-	spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
-	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_VLAN_POP |
-			  MLX5_FLOW_CONTEXT_ACTION_ALLOW;
-	vport->egress.allowed_vlan =
-		mlx5_add_flow_rules(vport->egress.acl, spec,
-				    &flow_act, NULL, 0);
-	if (IS_ERR(vport->egress.allowed_vlan)) {
-		err = PTR_ERR(vport->egress.allowed_vlan);
-		esw_warn(esw->dev,
-			 "vport[%d] configure egress pop prio tag vlan rule failed, err(%d)\n",
-			 vport->vport, err);
-		vport->egress.allowed_vlan = NULL;
-	}
-
-	kvfree(spec);
-	return err;
-}
-
 static int esw_vport_ingress_config(struct mlx5_eswitch *esw,
 				    struct mlx5_vport *vport)
 {
@@ -1954,9 +1912,17 @@ static int esw_vport_egress_config(struct mlx5_eswitch *esw,
 	if (err)
 		return err;
 
-	esw_debug(esw->dev, "vport(%d) configure egress rules\n", vport->vport);
+	/* For prio tag mode, there is only 1 FTEs:
+	 * 1) prio tag packets - pop the prio tag VLAN, allow
+	 * Unmatched traffic is allowed by default
+	 */
+	esw_debug(esw->dev,
+		  "vport[%d] configure prio tag egress rules\n", vport->vport);
 
-	err = esw_vport_egress_prio_tag_config(esw, vport);
+	/* prio tag vlan rule - pop it so VF receives untagged packets */
+	err = mlx5_esw_create_vport_egress_acl_vlan(esw, vport, 0,
+						    MLX5_FLOW_CONTEXT_ACTION_VLAN_POP |
+						    MLX5_FLOW_CONTEXT_ACTION_ALLOW);
 	if (err)
 		esw_vport_disable_egress_acl(esw, vport);