mlxsw: spectrum_switchdev: Add support for router port in SMID entries

In Spectrum, MDB entries point to MID entries, that indicate which ports a
packet should be forwarded to. Add the support in creating MID entries that
forward the packet to the Spectrum router port.

This will be later used to handle the bridge mrouter port switchdev
notifications.
Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Nogah Frankel <nogahf@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_switchdev.c

@@ -49,6 +49,7 @@
 #include <linux/netlink.h>
 #include <net/switchdev.h>
 
+#include "spectrum_router.h"
 #include "spectrum.h"
 #include "core.h"
 #include "reg.h"
@@ -1243,7 +1244,8 @@ static int mlxsw_sp_port_mdb_op(struct mlxsw_sp *mlxsw_sp, const char *addr,
 }
 
 static int mlxsw_sp_port_smid_full_entry(struct mlxsw_sp *mlxsw_sp, u16 mid_idx,
-					 long *ports_bitmap)
+					 long *ports_bitmap,
+					 bool set_router_port)
 {
 	char *smid_pl;
 	int err, i;
@@ -1258,9 +1260,15 @@ static int mlxsw_sp_port_smid_full_entry(struct mlxsw_sp *mlxsw_sp, u16 mid_idx,
 			mlxsw_reg_smid_port_mask_set(smid_pl, i, 1);
 	}
 
+	mlxsw_reg_smid_port_mask_set(smid_pl,
+				     mlxsw_sp_router_port(mlxsw_sp), 1);
+
 	for_each_set_bit(i, ports_bitmap, mlxsw_core_max_ports(mlxsw_sp->core))
 		mlxsw_reg_smid_port_set(smid_pl, i, 1);
 
+	mlxsw_reg_smid_port_set(smid_pl, mlxsw_sp_router_port(mlxsw_sp),
+				set_router_port);
+
 	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(smid), smid_pl);
 	kfree(smid_pl);
 	return err;
@@ -1364,7 +1372,8 @@ mlxsw_sp_mc_write_mdb_entry(struct mlxsw_sp *mlxsw_sp,
 	mlxsw_sp_mc_get_mrouters_bitmap(flood_bitmap, bridge_device, mlxsw_sp);
 
 	mid->mid = mid_idx;
-	err = mlxsw_sp_port_smid_full_entry(mlxsw_sp, mid_idx, flood_bitmap);
+	err = mlxsw_sp_port_smid_full_entry(mlxsw_sp, mid_idx, flood_bitmap,
+					    false);
 	kfree(flood_bitmap);
 	if (err)
 		return false;