mlxsw: spectrum_router: Use FIB notifications instead of switchdev calls

Until now, in order to offload a FIB entry to HW we use switchdev op.
However that has limits. Mainly in case we need to make the HW aware of
all route prefixes configured in kernel. HW needs to know those in order
to properly trap appropriate packets and pass the to kernel to do
the forwarding. Abort mechanism is now handled within the mlxsw driver.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -45,7 +45,7 @@
 #include <linux/list.h>
 #include <linux/dcbnl.h>
 #include <linux/in6.h>
-#include <net/switchdev.h>
+#include <linux/notifier.h>
 
 #include "port.h"
 #include "core.h"
@@ -257,6 +257,7 @@ struct mlxsw_sp_router {
 #define MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL 5000 /* ms */
 	struct list_head nexthop_group_list;
 	struct list_head nexthop_neighs_list;
+	bool aborted;
 };
 
 struct mlxsw_sp {
@@ -296,6 +297,7 @@ struct mlxsw_sp {
 		struct mlxsw_sp_span_entry *entries;
 		int entries_count;
 	} span;
+	struct notifier_block fib_nb;
 };
 
 static inline struct mlxsw_sp_upper *
@@ -584,11 +586,6 @@ static inline void mlxsw_sp_port_dcb_fini(struct mlxsw_sp_port *mlxsw_sp_port)
 
 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp);
 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp);
-int mlxsw_sp_router_fib4_add(struct mlxsw_sp_port *mlxsw_sp_port,
-			     const struct switchdev_obj_ipv4_fib *fib4,
-			     struct switchdev_trans *trans);
-int mlxsw_sp_router_fib4_del(struct mlxsw_sp_port *mlxsw_sp_port,
-			     const struct switchdev_obj_ipv4_fib *fib4);
 int mlxsw_sp_router_neigh_construct(struct net_device *dev,
 				    struct neighbour *n);
 void mlxsw_sp_router_neigh_destroy(struct net_device *dev,

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

@@ -1044,11 +1044,6 @@ static int mlxsw_sp_port_obj_add(struct net_device *dev,
 					      SWITCHDEV_OBJ_PORT_VLAN(obj),
 					      trans);
 		break;
-	case SWITCHDEV_OBJ_ID_IPV4_FIB:
-		err = mlxsw_sp_router_fib4_add(mlxsw_sp_port,
-					       SWITCHDEV_OBJ_IPV4_FIB(obj),
-					       trans);
-		break;
 	case SWITCHDEV_OBJ_ID_PORT_FDB:
 		err = mlxsw_sp_port_fdb_static_add(mlxsw_sp_port,
 						   SWITCHDEV_OBJ_PORT_FDB(obj),
@@ -1181,10 +1176,6 @@ static int mlxsw_sp_port_obj_del(struct net_device *dev,
 		err = mlxsw_sp_port_vlans_del(mlxsw_sp_port,
 					      SWITCHDEV_OBJ_PORT_VLAN(obj));
 		break;
-	case SWITCHDEV_OBJ_ID_IPV4_FIB:
-		err = mlxsw_sp_router_fib4_del(mlxsw_sp_port,
-					       SWITCHDEV_OBJ_IPV4_FIB(obj));
-		break;
 	case SWITCHDEV_OBJ_ID_PORT_FDB:
 		err = mlxsw_sp_port_fdb_static_del(mlxsw_sp_port,
 						   SWITCHDEV_OBJ_PORT_FDB(obj));