mlxsw: spectrum: Add FID miss trap

When there is no FID set for a specific packet, the HW will drop it.
However, by default these packets are useful to be delivered to CPU as
it can inspect them and program HW accordingly. So add this trap.

This would only ever happen when port is enslaved to an OVS master.
Otherwise, packets would be dropped during VLAN / STP filtering,
before FID classification.

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

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index f1c1b01a45a9c80ef14342bd7fc5038b701ed1d7..20c1b6c2dba0b3a7253a2a04dd6340d7fea12ce8 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -3008,6 +3008,7 @@ static const struct mlxsw_listener mlxsw_sp_listener[] = {
        MLXSW_SP_RXL_NO_MARK(IGMP_V3_REPORT, TRAP_TO_CPU, IGMP, false),
        MLXSW_SP_RXL_MARK(ARPBC, MIRROR_TO_CPU, ARP, false),
        MLXSW_SP_RXL_MARK(ARPUC, MIRROR_TO_CPU, ARP, false),
+       MLXSW_SP_RXL_NO_MARK(FID_MISS, TRAP_TO_CPU, IP2ME, false),
        /* L3 traps */
        MLXSW_SP_RXL_NO_MARK(MTUERROR, TRAP_TO_CPU, ROUTER_EXP, false),
        MLXSW_SP_RXL_NO_MARK(TTLERROR, TRAP_TO_CPU, ROUTER_EXP, false),

diff --git a/drivers/net/ethernet/mellanox/mlxsw/trap.h b/drivers/net/ethernet/mellanox/mlxsw/trap.h
index 02ea48b15eb57f7533a838806107732b7ea97c26..e008fdbed20fd34e13ef3dbd357f663b681cfaa8 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/trap.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/trap.h
@@ -55,6 +55,7 @@ enum {
        MLXSW_TRAP_ID_IGMP_V2_LEAVE = 0x33,
        MLXSW_TRAP_ID_IGMP_V3_REPORT = 0x34,
        MLXSW_TRAP_ID_PKT_SAMPLE = 0x38,
+       MLXSW_TRAP_ID_FID_MISS = 0x3D,
        MLXSW_TRAP_ID_ARPBC = 0x50,
        MLXSW_TRAP_ID_ARPUC = 0x51,
        MLXSW_TRAP_ID_MTUERROR = 0x52,