mlxsw: spectrum: Replace vPorts with Port-VLAN

As explained in the cover letter, since the introduction of the bridge
offload in the mlxsw driver, information related to the offloaded bridge
and bridge ports was stored in the individual port struct,
mlxsw_sp_port.

This lead to a bloated struct storing both physical properties of the
port (e.g., autoneg status) as well as logical properties of an upper
bridge port (e.g., learning, mrouter indication). While this might work
well for simple devices, it proved to be hard to extend when stacked
devices were taken into account and more advanced use-cases (e.g., IGMP
snooping) considered.

This patch removes the excess information from the above struct and
instead stores it in more appropriate structs that represent the bridge
port, the bridge itself and a VLAN configured on the bridge port.

The membership of a port in a bridge is denoted using the Port-VLAN
struct, which points to the bridge port and also member in the bridge
VLAN group of the VLAN it represents. This allows us to completely
remove the vPort abstraction and consolidate many of the code paths
relating to VLAN-aware and unaware bridges.

Note that the FID / vFID code is currently duplicated, but this will
soon go away when the common FID core will be introduced.

Signed-off-by: Ido Schimmel <idosch@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.h

@@ -204,11 +204,15 @@ struct mlxsw_sp_port_sample {
 	bool truncate;
 };
 
+struct mlxsw_sp_bridge_port;
+
 struct mlxsw_sp_port_vlan {
 	struct list_head list;
 	struct mlxsw_sp_port *mlxsw_sp_port;
 	struct mlxsw_sp_fid *fid;
 	u16 vid;
+	struct mlxsw_sp_bridge_port *bridge_port;
+	struct list_head bridge_vlan_node;
 };
 
 struct mlxsw_sp_port {
@@ -216,23 +220,10 @@ struct mlxsw_sp_port {
 	struct mlxsw_sp_port_pcpu_stats __percpu *pcpu_stats;
 	struct mlxsw_sp *mlxsw_sp;
 	u8 local_port;
-	u8 stp_state;
-	u16 learning:1,
-	   learning_sync:1,
-	   uc_flood:1,
-	   mc_flood:1,
-	   mc_router:1,
-	   mc_disabled:1,
-	   bridged:1,
-	   lagged:1,
+	u8 lagged:1,
 	   split:1;
 	u16 pvid;
 	u16 lag_id;
-	struct {
-		struct list_head list;
-		struct mlxsw_sp_fid *f;
-		u16 vid;
-	} vport;
 	struct {
 		u8 tx_pause:1,
 		   rx_pause:1,
@@ -248,11 +239,6 @@ struct mlxsw_sp_port {
 		u8 width;
 		u8 lane;
 	} mapping;
-	/* 802.1Q bridge VLANs */
-	unsigned long *active_vlans;
-	unsigned long *untagged_vlans;
-	/* VLAN interfaces */
-	struct list_head vports_list;
 	/* TC handles */
 	struct list_head mall_tc_list;
 	struct {
@@ -267,6 +253,7 @@ struct mlxsw_sp_port {
 
 bool mlxsw_sp_port_dev_check(const struct net_device *dev);
 struct mlxsw_sp *mlxsw_sp_lower_get(struct net_device *dev);
+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);
 
@@ -303,79 +290,6 @@ mlxsw_sp_port_vlan_find_by_vid(const struct mlxsw_sp_port *mlxsw_sp_port,
 	return NULL;
 }
 
-static inline u16
-mlxsw_sp_vport_vid_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
-{
-	return mlxsw_sp_vport->vport.vid;
-}
-
-static inline bool
-mlxsw_sp_port_is_vport(const struct mlxsw_sp_port *mlxsw_sp_port)
-{
-	u16 vid = mlxsw_sp_vport_vid_get(mlxsw_sp_port);
-
-	return vid != 0;
-}
-
-static inline void mlxsw_sp_vport_fid_set(struct mlxsw_sp_port *mlxsw_sp_vport,
-					  struct mlxsw_sp_fid *f)
-{
-	mlxsw_sp_vport->vport.f = f;
-}
-
-static inline struct mlxsw_sp_fid *
-mlxsw_sp_vport_fid_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
-{
-	return mlxsw_sp_vport->vport.f;
-}
-
-static inline struct net_device *
-mlxsw_sp_vport_dev_get(const struct mlxsw_sp_port *mlxsw_sp_vport)
-{
-	struct mlxsw_sp_fid *f = mlxsw_sp_vport_fid_get(mlxsw_sp_vport);
-
-	return f ? f->dev : NULL;
-}
-
-static inline struct mlxsw_sp_port *
-mlxsw_sp_port_vport_find(const struct mlxsw_sp_port *mlxsw_sp_port, u16 vid)
-{
-	struct mlxsw_sp_port *mlxsw_sp_vport;
-
-	list_for_each_entry(mlxsw_sp_vport, &mlxsw_sp_port->vports_list,
-			    vport.list) {
-		if (mlxsw_sp_vport_vid_get(mlxsw_sp_vport) == vid)
-			return mlxsw_sp_vport;
-	}
-
-	return NULL;
-}
-
-static inline struct mlxsw_sp_port *
-mlxsw_sp_port_vport_find_by_fid(const struct mlxsw_sp_port *mlxsw_sp_port,
-				u16 fid)
-{
-	struct mlxsw_sp_port *mlxsw_sp_vport;
-
-	list_for_each_entry(mlxsw_sp_vport, &mlxsw_sp_port->vports_list,
-			    vport.list) {
-		struct mlxsw_sp_fid *f = mlxsw_sp_vport_fid_get(mlxsw_sp_vport);
-
-		if (f && f->fid == fid)
-			return mlxsw_sp_vport;
-	}
-
-	return NULL;
-}
-
-static inline struct mlxsw_sp_port *
-mlxsw_sp_vport_port(const struct mlxsw_sp_port *mlxsw_sp_vport)
-{
-	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_vport->mlxsw_sp;
-
-	return mlxsw_sp->ports[mlxsw_sp_vport->local_port];
-}
-
 static inline struct mlxsw_sp_fid *mlxsw_sp_fid_find(struct mlxsw_sp *mlxsw_sp,
 						     u16 fid)
 {
@@ -444,10 +358,8 @@ int mlxsw_sp_sb_occ_tc_port_bind_get(struct mlxsw_core_port *mlxsw_core_port,
 u32 mlxsw_sp_cells_bytes(const struct mlxsw_sp *mlxsw_sp, u32 cells);
 u32 mlxsw_sp_bytes_cells(const struct mlxsw_sp *mlxsw_sp, u32 bytes);
 
-struct mlxsw_sp_upper *mlxsw_sp_master_bridge(const struct mlxsw_sp *mlxsw_sp);
 int mlxsw_sp_switchdev_init(struct mlxsw_sp *mlxsw_sp);
 void mlxsw_sp_switchdev_fini(struct mlxsw_sp *mlxsw_sp);
-int mlxsw_sp_port_vlan_init(struct mlxsw_sp_port *mlxsw_sp_port);
 void mlxsw_sp_port_switchdev_init(struct mlxsw_sp_port *mlxsw_sp_port);
 void mlxsw_sp_port_switchdev_fini(struct mlxsw_sp_port *mlxsw_sp_port);
 int mlxsw_sp_port_vid_to_fid_set(struct mlxsw_sp_port *mlxsw_sp_port,
@@ -455,14 +367,19 @@ int mlxsw_sp_port_vid_to_fid_set(struct mlxsw_sp_port *mlxsw_sp_port,
 				 u16 vid);
 int mlxsw_sp_port_vlan_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid_begin,
 			   u16 vid_end, bool is_member, bool untagged);
-int mlxsw_sp_vport_flood_set(struct mlxsw_sp_port *mlxsw_sp_vport, u16 fid,
-			     bool set);
-void mlxsw_sp_port_active_vlans_del(struct mlxsw_sp_port *mlxsw_sp_port);
-int mlxsw_sp_port_fdb_flush(struct mlxsw_sp_port *mlxsw_sp_port, u16 fid);
 int mlxsw_sp_rif_fdb_op(struct mlxsw_sp *mlxsw_sp, const char *mac, u16 fid,
 			bool adding);
 struct mlxsw_sp_fid *mlxsw_sp_fid_create(struct mlxsw_sp *mlxsw_sp, u16 fid);
-void mlxsw_sp_fid_destroy(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fid *f);
+int mlxsw_sp_fid_op(struct mlxsw_sp *mlxsw_sp, u16 fid_index, bool valid);
+void
+mlxsw_sp_port_vlan_bridge_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan);
+int mlxsw_sp_port_bridge_join(struct mlxsw_sp_port *mlxsw_sp_port,
+			      struct net_device *brport_dev,
+			      struct net_device *br_dev);
+void mlxsw_sp_port_bridge_leave(struct mlxsw_sp_port *mlxsw_sp_port,
+				struct net_device *brport_dev,
+				struct net_device *br_dev);
+
 int mlxsw_sp_port_ets_set(struct mlxsw_sp_port *mlxsw_sp_port,
 			  enum mlxsw_reg_qeec_hr hr, u8 index, u8 next_index,
 			  bool dwrr, u8 dwrr_weight);
@@ -481,6 +398,9 @@ int mlxsw_sp_port_vid_learning_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid,
 int mlxsw_sp_port_pvid_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid);
 int mlxsw_sp_port_vp_mode_trans(struct mlxsw_sp_port *mlxsw_sp_port);
 int mlxsw_sp_port_vlan_mode_trans(struct mlxsw_sp_port *mlxsw_sp_port);
+struct mlxsw_sp_port_vlan *
+mlxsw_sp_port_vlan_get(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid);
+void mlxsw_sp_port_vlan_put(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan);
 
 #ifdef CONFIG_MLXSW_SPECTRUM_DCB
 

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

@@ -3244,7 +3244,7 @@ static struct mlxsw_sp_fid *mlxsw_sp_bridge_fid_get(struct mlxsw_sp *mlxsw_sp,
 
 	if (is_vlan_dev(l3_dev))
 		fid_index = vlan_dev_vlan_id(l3_dev);
-	else if (mlxsw_sp_master_bridge(mlxsw_sp)->dev == l3_dev)
+	else if (br_vlan_enabled(l3_dev))
 		fid_index = 1;
 	else
 		return mlxsw_sp_vfid_find(mlxsw_sp, l3_dev);
@@ -3437,7 +3437,6 @@ static int mlxsw_sp_inetaddr_vlan_event(struct net_device *vlan_dev,
 					unsigned long event)
 {
 	struct net_device *real_dev = vlan_dev_real_dev(vlan_dev);
-	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(vlan_dev);
 	u16 vid = vlan_dev_vlan_id(vlan_dev);
 
 	if (mlxsw_sp_port_dev_check(real_dev))
@@ -3446,8 +3445,7 @@ static int mlxsw_sp_inetaddr_vlan_event(struct net_device *vlan_dev,
 	else if (netif_is_lag_master(real_dev))
 		return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event,
 						     vid);
-	else if (netif_is_bridge_master(real_dev) &&
-		 mlxsw_sp_master_bridge(mlxsw_sp)->dev == real_dev)
+	else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev))
 		return mlxsw_sp_inetaddr_bridge_event(vlan_dev, real_dev,
 						      event);