mlxsw: spectrum: Extend and export SPAN API

Extend SPAN API for ACL case. In case of ACL triggering the MPAR register
shouldn't be configured. This patch also export those helpers for
ACL usage.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -568,7 +568,7 @@ static void mlxsw_sp_span_entry_destroy(struct mlxsw_sp *mlxsw_sp,
 	span_entry->used = false;
 }
 
-static struct mlxsw_sp_span_entry *
+struct mlxsw_sp_span_entry *
 mlxsw_sp_span_entry_find(struct mlxsw_sp *mlxsw_sp, u8 local_port)
 {
 	int i;
@@ -669,13 +669,28 @@ mlxsw_sp_span_entry_bound_port_find(struct mlxsw_sp_port *port,
 static int
 mlxsw_sp_span_inspected_port_bind(struct mlxsw_sp_port *port,
 				  struct mlxsw_sp_span_entry *span_entry,
-				  enum mlxsw_sp_span_type type)
+				  enum mlxsw_sp_span_type type,
+				  bool bind)
 {
-	struct mlxsw_sp_span_inspected_port *inspected_port;
 	struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
 	char mpar_pl[MLXSW_REG_MPAR_LEN];
-	char sbib_pl[MLXSW_REG_SBIB_LEN];
 	int pa_id = span_entry->id;
+
+	/* bind the port to the SPAN entry */
+	mlxsw_reg_mpar_pack(mpar_pl, port->local_port,
+			    (enum mlxsw_reg_mpar_i_e) type, bind, pa_id);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpar), mpar_pl);
+}
+
+static int
+mlxsw_sp_span_inspected_port_add(struct mlxsw_sp_port *port,
+				 struct mlxsw_sp_span_entry *span_entry,
+				 enum mlxsw_sp_span_type type,
+				 bool bind)
+{
+	struct mlxsw_sp_span_inspected_port *inspected_port;
+	struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
+	char sbib_pl[MLXSW_REG_SBIB_LEN];
 	int err;
 
 	/* if it is an egress SPAN, bind a shared buffer to it */
@@ -691,12 +706,12 @@ mlxsw_sp_span_inspected_port_bind(struct mlxsw_sp_port *port,
 		}
 	}
 
-	/* bind the port to the SPAN entry */
-	mlxsw_reg_mpar_pack(mpar_pl, port->local_port,
-			    (enum mlxsw_reg_mpar_i_e) type, true, pa_id);
-	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpar), mpar_pl);
-	if (err)
-		goto err_mpar_reg_write;
+	if (bind) {
+		err = mlxsw_sp_span_inspected_port_bind(port, span_entry, type,
+							true);
+		if (err)
+			goto err_port_bind;
+	}
 
 	inspected_port = kzalloc(sizeof(*inspected_port), GFP_KERNEL);
 	if (!inspected_port) {
@@ -709,8 +724,11 @@ mlxsw_sp_span_inspected_port_bind(struct mlxsw_sp_port *port,
 
 	return 0;
 
-err_mpar_reg_write:
 err_inspected_port_alloc:
+	if (bind)
+		mlxsw_sp_span_inspected_port_bind(port, span_entry, type,
+						  false);
+err_port_bind:
 	if (type == MLXSW_SP_SPAN_EGRESS) {
 		mlxsw_reg_sbib_pack(sbib_pl, port->local_port, 0);
 		mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
@@ -719,25 +737,22 @@ mlxsw_sp_span_inspected_port_bind(struct mlxsw_sp_port *port,
 }
 
 static void
-mlxsw_sp_span_inspected_port_unbind(struct mlxsw_sp_port *port,
-				    struct mlxsw_sp_span_entry *span_entry,
-				    enum mlxsw_sp_span_type type)
+mlxsw_sp_span_inspected_port_del(struct mlxsw_sp_port *port,
+				 struct mlxsw_sp_span_entry *span_entry,
+				 enum mlxsw_sp_span_type type,
+				 bool bind)
 {
 	struct mlxsw_sp_span_inspected_port *inspected_port;
 	struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
-	char mpar_pl[MLXSW_REG_MPAR_LEN];
 	char sbib_pl[MLXSW_REG_SBIB_LEN];
-	int pa_id = span_entry->id;
 
 	inspected_port = mlxsw_sp_span_entry_bound_port_find(port, span_entry);
 	if (!inspected_port)
 		return;
 
-	/* remove the inspected port */
-	mlxsw_reg_mpar_pack(mpar_pl, port->local_port,
-			    (enum mlxsw_reg_mpar_i_e) type, false, pa_id);
-	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mpar), mpar_pl);
-
+	if (bind)
+		mlxsw_sp_span_inspected_port_bind(port, span_entry, type,
+						  false);
 	/* remove the SBIB buffer if it was egress SPAN */
 	if (type == MLXSW_SP_SPAN_EGRESS) {
 		mlxsw_reg_sbib_pack(sbib_pl, port->local_port, 0);
@@ -750,9 +765,9 @@ mlxsw_sp_span_inspected_port_unbind(struct mlxsw_sp_port *port,
 	kfree(inspected_port);
 }
 
-static int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
-				    struct mlxsw_sp_port *to,
-				    enum mlxsw_sp_span_type type)
+int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
+			     struct mlxsw_sp_port *to,
+			     enum mlxsw_sp_span_type type, bool bind)
 {
 	struct mlxsw_sp *mlxsw_sp = from->mlxsw_sp;
 	struct mlxsw_sp_span_entry *span_entry;
@@ -765,7 +780,7 @@ static int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
 	netdev_dbg(from->dev, "Adding inspected port to SPAN entry %d\n",
 		   span_entry->id);
 
-	err = mlxsw_sp_span_inspected_port_bind(from, span_entry, type);
+	err = mlxsw_sp_span_inspected_port_add(from, span_entry, type, bind);
 	if (err)
 		goto err_port_bind;
 
@@ -776,9 +791,8 @@ static int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
 	return err;
 }
 
-static void mlxsw_sp_span_mirror_remove(struct mlxsw_sp_port *from,
-					u8 destination_port,
-					enum mlxsw_sp_span_type type)
+void mlxsw_sp_span_mirror_del(struct mlxsw_sp_port *from, u8 destination_port,
+			      enum mlxsw_sp_span_type type, bool bind)
 {
 	struct mlxsw_sp_span_entry *span_entry;
 
@@ -791,7 +805,7 @@ static void mlxsw_sp_span_mirror_remove(struct mlxsw_sp_port *from,
 
 	netdev_dbg(from->dev, "removing inspected port from SPAN entry %d\n",
 		   span_entry->id);
-	mlxsw_sp_span_inspected_port_unbind(from, span_entry, type);
+	mlxsw_sp_span_inspected_port_del(from, span_entry, type, bind);
 }
 
 static int mlxsw_sp_port_sample_set(struct mlxsw_sp_port *mlxsw_sp_port,
@@ -1582,7 +1596,8 @@ mlxsw_sp_port_add_cls_matchall_mirror(struct mlxsw_sp_port *mlxsw_sp_port,
 	mirror->to_local_port = to_port->local_port;
 	mirror->ingress = ingress;
 	span_type = ingress ? MLXSW_SP_SPAN_INGRESS : MLXSW_SP_SPAN_EGRESS;
-	return mlxsw_sp_span_mirror_add(mlxsw_sp_port, to_port, span_type);
+	return mlxsw_sp_span_mirror_add(mlxsw_sp_port, to_port, span_type,
+					true);
 }
 
 static void
@@ -1593,8 +1608,8 @@ mlxsw_sp_port_del_cls_matchall_mirror(struct mlxsw_sp_port *mlxsw_sp_port,
 
 	span_type = mirror->ingress ?
 			MLXSW_SP_SPAN_INGRESS : MLXSW_SP_SPAN_EGRESS;
-	mlxsw_sp_span_mirror_remove(mlxsw_sp_port, mirror->to_local_port,
-				    span_type);
+	mlxsw_sp_span_mirror_del(mlxsw_sp_port, mirror->to_local_port,
+				 span_type, true);
 }
 
 static int

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -396,6 +396,16 @@ struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find(struct net_device *dev);
 struct mlxsw_sp_port *mlxsw_sp_port_lower_dev_hold(struct net_device *dev);
 void mlxsw_sp_port_dev_put(struct mlxsw_sp_port *mlxsw_sp_port);
 struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find_rcu(struct net_device *dev);
+int mlxsw_sp_span_mirror_add(struct mlxsw_sp_port *from,
+			     struct mlxsw_sp_port *to,
+			     enum mlxsw_sp_span_type type,
+			     bool bind);
+void mlxsw_sp_span_mirror_del(struct mlxsw_sp_port *from,
+			      u8 destination_port,
+			      enum mlxsw_sp_span_type type,
+			      bool bind);
+struct mlxsw_sp_span_entry *
+mlxsw_sp_span_entry_find(struct mlxsw_sp *mlxsw_sp, u8 local_port);
 
 /* spectrum_dcb.c */
 #ifdef CONFIG_MLXSW_SPECTRUM_DCB