Commit 607feade authored Oct 03, 2017 by Yotam Gigi Committed by David S. Miller Oct 03, 2017

mlxsw: spectrum: mr_tcam: Add trap-and-forward multicast route

In addition to the current multicast route actions, which include trap
route action and a forward route action, add the trap-and-forward multicast
route action, and implement it in the multicast routing hardware logic.

To implement that, add a trap-and-forward ACL action as the last action in
the route flexible action set. The used trap is the ACL2 trap, which marks
the packets with offload_mr_forward_mark, to prevent the packet from being
forwarded again by the kernel.

Note: At that stage the offloading logic does not support trap-and-forward
multicast routes. This patch adds the support only in the hardware logic.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent a0040c8c

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

+1 −0

Original line number	Diff line number	Diff line
		@@ -42,6 +42,7 @@
		enum mlxsw_sp_mr_route_action {
		MLXSW_SP_MR_ROUTE_ACTION_FORWARD,
		MLXSW_SP_MR_ROUTE_ACTION_TRAP,
		MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD,
		};

		enum mlxsw_sp_mr_route_prio {

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

+8 −0

Original line number	Diff line number	Diff line
		@@ -253,6 +253,7 @@ mlxsw_sp_mr_tcam_afa_block_create(struct mlxsw_sp *mlxsw_sp,
		if (err)
		goto err;
		break;
		case MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD:
		case MLXSW_SP_MR_ROUTE_ACTION_FORWARD:
		/* If we are about to append a multicast router action, commit
		* the erif_list.
		@@ -266,6 +267,13 @@ mlxsw_sp_mr_tcam_afa_block_create(struct mlxsw_sp *mlxsw_sp,
		erif_list->kvdl_index);
		if (err)
		goto err;

		if (route_action == MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD) {
		err = mlxsw_afa_block_append_trap_and_forward(afa_block,
		MLXSW_TRAP_ID_ACL2);
		if (err)
		goto err;
		}
		break;
		default:
		err = -EINVAL;