net/mlx5: Bridge, add per-port multicast replication tables

Multicast replication requires adding one more level of FDB_BR_OFFLOAD
priority flow tables. The new level is used for per-port multicast-specific
tables that have following flow groups structure (flow highest to lowest
priority):

- Flow group of size one that matches on source port metadata. This will
have a static single rule that prevent packets from being replicated to
their source port.

- Flow group of size one that matches all packets and forwards them to the
port that owns the table.

Initialize the table dynamically on all bridge ports when adding a port to
the bridge that has multicast enabled and on all existing bridge ports when
receiving multicast enable notification.
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/esw/bridge.c

@@ -61,7 +61,7 @@ mlx5_esw_bridge_pkt_reformat_vlan_pop_create(struct mlx5_eswitch *esw)
 	return mlx5_packet_reformat_alloc(esw->dev, &reformat_params, MLX5_FLOW_NAMESPACE_FDB);
 }
 
-static struct mlx5_flow_table *
+struct mlx5_flow_table *
 mlx5_esw_bridge_table_create(int max_fte, u32 level, struct mlx5_eswitch *esw)
 {
 	struct mlx5_flow_table_attr ft_attr = {};
@@ -1506,6 +1506,15 @@ static int mlx5_esw_bridge_vport_init(u16 vport_num, u16 esw_owner_vhca_id, u16
 	port->bridge = bridge;
 	port->flags |= flags;
 	xa_init(&port->vlans);
+
+	err = mlx5_esw_bridge_port_mcast_init(port);
+	if (err) {
+		esw_warn(esw->dev,
+			 "Failed to initialize port multicast (vport=%u,esw_owner_vhca_id=%u,err=%d)\n",
+			 port->vport_num, port->esw_owner_vhca_id, err);
+		goto err_port_mcast;
+	}
+
 	err = mlx5_esw_bridge_port_insert(port, br_offloads);
 	if (err) {
 		esw_warn(esw->dev,
@@ -1518,6 +1527,8 @@ static int mlx5_esw_bridge_vport_init(u16 vport_num, u16 esw_owner_vhca_id, u16
 	return 0;
 
 err_port_insert:
+	mlx5_esw_bridge_port_mcast_cleanup(port);
+err_port_mcast:
 	kvfree(port);
 	return err;
 }
@@ -1535,6 +1546,7 @@ static int mlx5_esw_bridge_vport_cleanup(struct mlx5_esw_bridge_offloads *br_off
 
 	trace_mlx5_esw_bridge_vport_cleanup(port);
 	mlx5_esw_bridge_port_vlans_flush(port, bridge);
+	mlx5_esw_bridge_port_mcast_cleanup(port);
 	mlx5_esw_bridge_port_erase(port, br_offloads);
 	kvfree(port);
 	mlx5_esw_bridge_put(br_offloads, bridge);

drivers/net/ethernet/mellanox/mlx5/core/esw/bridge_priv.h

@@ -81,9 +81,23 @@ static_assert(MLX5_ESW_BRIDGE_EGRESS_TABLE_SIZE == 524288);
 
 #define MLX5_ESW_BRIDGE_SKIP_TABLE_SIZE 0
 
+#define MLX5_ESW_BRIDGE_MCAST_TABLE_FILTER_GRP_SIZE 1
+#define MLX5_ESW_BRIDGE_MCAST_TABLE_FWD_GRP_SIZE 1
+#define MLX5_ESW_BRIDGE_MCAST_TABLE_FILTER_GRP_IDX_FROM 0
+#define MLX5_ESW_BRIDGE_MCAST_TABLE_FILTER_GRP_IDX_TO		\
+	(MLX5_ESW_BRIDGE_MCAST_TABLE_FILTER_GRP_SIZE - 1)
+#define MLX5_ESW_BRIDGE_MCAST_TABLE_FWD_GRP_IDX_FROM		\
+	(MLX5_ESW_BRIDGE_MCAST_TABLE_FILTER_GRP_IDX_TO + 1)
+#define MLX5_ESW_BRIDGE_MCAST_TABLE_FWD_GRP_IDX_TO			\
+	(MLX5_ESW_BRIDGE_MCAST_TABLE_FWD_GRP_IDX_FROM +			\
+	 MLX5_ESW_BRIDGE_MCAST_TABLE_FWD_GRP_SIZE - 1)
+
+#define MLX5_ESW_BRIDGE_MCAST_TABLE_SIZE			\
+	(MLX5_ESW_BRIDGE_MCAST_TABLE_FWD_GRP_IDX_TO + 1)
 enum {
 	MLX5_ESW_BRIDGE_LEVEL_INGRESS_TABLE,
 	MLX5_ESW_BRIDGE_LEVEL_EGRESS_TABLE,
+	MLX5_ESW_BRIDGE_LEVEL_MCAST_TABLE,
 	MLX5_ESW_BRIDGE_LEVEL_SKIP_TABLE,
 };
 
@@ -138,6 +152,14 @@ struct mlx5_esw_bridge_port {
 	u16 flags;
 	struct mlx5_esw_bridge *bridge;
 	struct xarray vlans;
+	struct {
+		struct mlx5_flow_table *ft;
+		struct mlx5_flow_group *filter_fg;
+		struct mlx5_flow_group *fwd_fg;
+
+		struct mlx5_flow_handle *filter_handle;
+		struct mlx5_flow_handle *fwd_handle;
+	} mcast;
 };
 
 struct mlx5_esw_bridge {
@@ -161,6 +183,12 @@ struct mlx5_esw_bridge {
 	u16 vlan_proto;
 };
 
+struct mlx5_flow_table *mlx5_esw_bridge_table_create(int max_fte, u32 level,
+						     struct mlx5_eswitch *esw);
+
+int mlx5_esw_bridge_port_mcast_init(struct mlx5_esw_bridge_port *port);
+void mlx5_esw_bridge_port_mcast_cleanup(struct mlx5_esw_bridge_port *port);
+
 int mlx5_esw_bridge_mcast_enable(struct mlx5_esw_bridge *bridge);
 void mlx5_esw_bridge_mcast_disable(struct mlx5_esw_bridge *bridge);
 

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

@@ -2997,7 +2997,7 @@ static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
 		goto out_err;
 	}
 
-	maj_prio = fs_create_prio(&steering->fdb_root_ns->ns, FDB_BR_OFFLOAD, 3);
+	maj_prio = fs_create_prio(&steering->fdb_root_ns->ns, FDB_BR_OFFLOAD, 4);
 	if (IS_ERR(maj_prio)) {
 		err = PTR_ERR(maj_prio);
 		goto out_err;