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mlxsw: spectrum: Add traps needed for router implementation

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ip2me:
To instruct HW to send trapped ip2me traffic to kernel, we have to add
this trap. Selection ip2me traffic is introduced later on in this set.

ARPs:
We are going to stop flooding to CPU port when netdev isn't bridged and
only get packets destined to the netdev's IP address and certain control
packets.

Add traps for ARP request (broadcast) and response (unicast) in order to
get these to the CPU and resolve neighbours.

host miss:
If a packet is routed through a directly connected route and its
destination IP is not in the device's neighbour table, then we need to
trap it to CPU. This will cause the host to resolve the MAC of the
neighbour, which will be eventually programmed to the device's table.

router ingress:
In order to trap packets in router part.

Signed-off-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:
Jiri Pirko 2016-07-02 11:00:20 +02:00 committed by David S. Miller
parent 10f00aa1c4
commit 7b27ce7bb9
2 changed files with 30 additions and 0 deletions
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25
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -2255,6 +2255,31 @@ static const struct mlxsw_rx_listener mlxsw_sp_rx_listener[] = {
.local_port = MLXSW_PORT_DONT_CARE,
.trap_id = MLXSW_TRAP_ID_IGMP_V3_REPORT,
},
{
.func = mlxsw_sp_rx_listener_func,
.local_port = MLXSW_PORT_DONT_CARE,
.trap_id = MLXSW_TRAP_ID_ARPBC,
},
{
.func = mlxsw_sp_rx_listener_func,
.local_port = MLXSW_PORT_DONT_CARE,
.trap_id = MLXSW_TRAP_ID_ARPUC,
},
{
.func = mlxsw_sp_rx_listener_func,
.local_port = MLXSW_PORT_DONT_CARE,
.trap_id = MLXSW_TRAP_ID_IP2ME,
},
{
.func = mlxsw_sp_rx_listener_func,
.local_port = MLXSW_PORT_DONT_CARE,
.trap_id = MLXSW_TRAP_ID_RTR_INGRESS0,
},
{
.func = mlxsw_sp_rx_listener_func,
.local_port = MLXSW_PORT_DONT_CARE,
.trap_id = MLXSW_TRAP_ID_HOST_MISS_IPV4,
},
};
static int mlxsw_sp_traps_init(struct mlxsw_sp *mlxsw_sp)

5
drivers/net/ethernet/mellanox/mlxsw/trap.h
View File

@ -54,6 +54,11 @@ enum {
MLXSW_TRAP_ID_IGMP_V2_REPORT = 0x32,
MLXSW_TRAP_ID_IGMP_V2_LEAVE = 0x33,
MLXSW_TRAP_ID_IGMP_V3_REPORT = 0x34,
MLXSW_TRAP_ID_ARPBC = 0x50,
MLXSW_TRAP_ID_ARPUC = 0x51,
MLXSW_TRAP_ID_IP2ME = 0x5F,
MLXSW_TRAP_ID_RTR_INGRESS0 = 0x70,
MLXSW_TRAP_ID_HOST_MISS_IPV4 = 0x90,
MLXSW_TRAP_ID_MAX = 0x1FF
};