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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>
This commit is contained in:
Yotam Gigi 2017-10-03 09:58:11 +02:00 committed by David S. Miller
parent a0040c8c93
commit 607feadef8
2 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.h
View File

@ -42,6 +42,7 @@
enum mlxsw_sp_mr_route_action { enum mlxsw_sp_mr_route_action {
MLXSW_SP_MR_ROUTE_ACTION_FORWARD, MLXSW_SP_MR_ROUTE_ACTION_FORWARD,
MLXSW_SP_MR_ROUTE_ACTION_TRAP, MLXSW_SP_MR_ROUTE_ACTION_TRAP,
MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD,
}; };
enum mlxsw_sp_mr_route_prio { enum mlxsw_sp_mr_route_prio {

8
drivers/net/ethernet/mellanox/mlxsw/spectrum_mr_tcam.c
View File

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