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mlxsw: spectrum: Add multicast router traps and trap groups

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Add three new traps needed for multicast routing:
 - PIM: Trap for PIM protocol control packets.
 - RPF: Trap for packets that fail the RPF check on a specific hardware
   route entry.
 - MULTICAST: Generic trap for multicast. It is used for routes that trap
   the packets to the CPU.

The RPF and MULTICAST traps have rate limiters as these traps may have
line-rate of packets trapped. The PIM trap has a rate limiter similarly to
other L3 control protocols. The rate limiters are implemented by adding
three new trap groups for the newly introduced traps.

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 2017-09-19 10:00:20 +02:00 committed by David S. Miller
parent 91e4d59a46
commit b48cfc80ce
3 changed files with 17 additions and 0 deletions
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3
drivers/net/ethernet/mellanox/mlxsw/reg.h
View File

@ -3681,12 +3681,15 @@ enum mlxsw_reg_htgt_trap_group {
MLXSW_REG_HTGT_TRAP_GROUP_SP_IGMP,
MLXSW_REG_HTGT_TRAP_GROUP_SP_BGP,
MLXSW_REG_HTGT_TRAP_GROUP_SP_OSPF,
MLXSW_REG_HTGT_TRAP_GROUP_SP_PIM,
MLXSW_REG_HTGT_TRAP_GROUP_SP_MULTICAST,
MLXSW_REG_HTGT_TRAP_GROUP_SP_ARP,
MLXSW_REG_HTGT_TRAP_GROUP_SP_HOST_MISS,
MLXSW_REG_HTGT_TRAP_GROUP_SP_ROUTER_EXP,
MLXSW_REG_HTGT_TRAP_GROUP_SP_REMOTE_ROUTE,
MLXSW_REG_HTGT_TRAP_GROUP_SP_IP2ME,
MLXSW_REG_HTGT_TRAP_GROUP_SP_DHCP,
MLXSW_REG_HTGT_TRAP_GROUP_SP_RPF,
MLXSW_REG_HTGT_TRAP_GROUP_SP_EVENT,
MLXSW_REG_HTGT_TRAP_GROUP_SP_IPV6_MLD,
MLXSW_REG_HTGT_TRAP_GROUP_SP_IPV6_ND,

10
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -3421,6 +3421,10 @@ static const struct mlxsw_listener mlxsw_sp_listener[] = {
false, SP_IP2ME, DISCARD),
/* ACL trap */
MLXSW_SP_RXL_NO_MARK(ACL0, TRAP_TO_CPU, IP2ME, false),
/* Multicast Router Traps */
MLXSW_SP_RXL_MARK(IPV4_PIM, TRAP_TO_CPU, PIM, false),
MLXSW_SP_RXL_MARK(RPF, TRAP_TO_CPU, RPF, false),
MLXSW_SP_RXL_MARK(ACL1, TRAP_TO_CPU, MULTICAST, false),
};
static int mlxsw_sp_cpu_policers_set(struct mlxsw_core *mlxsw_core)
@ -3446,6 +3450,8 @@ static int mlxsw_sp_cpu_policers_set(struct mlxsw_core *mlxsw_core)
case MLXSW_REG_HTGT_TRAP_GROUP_SP_LACP:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_LLDP:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_OSPF:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_PIM:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_RPF:
rate = 128;
burst_size = 7;
break;
@ -3461,6 +3467,7 @@ static int mlxsw_sp_cpu_policers_set(struct mlxsw_core *mlxsw_core)
case MLXSW_REG_HTGT_TRAP_GROUP_SP_ROUTER_EXP:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_REMOTE_ROUTE:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_IPV6_ND:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_MULTICAST:
rate = 1024;
burst_size = 7;
break;
@ -3506,6 +3513,7 @@ static int mlxsw_sp_trap_groups_set(struct mlxsw_core *mlxsw_core)
case MLXSW_REG_HTGT_TRAP_GROUP_SP_LACP:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_LLDP:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_OSPF:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_PIM:
priority = 5;
tc = 5;
break;
@ -3522,12 +3530,14 @@ static int mlxsw_sp_trap_groups_set(struct mlxsw_core *mlxsw_core)
break;
case MLXSW_REG_HTGT_TRAP_GROUP_SP_ARP:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_IPV6_ND:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_RPF:
priority = 2;
tc = 2;
break;
case MLXSW_REG_HTGT_TRAP_GROUP_SP_HOST_MISS:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_ROUTER_EXP:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_REMOTE_ROUTE:
case MLXSW_REG_HTGT_TRAP_GROUP_SP_MULTICAST:
priority = 1;
tc = 1;
break;

4
drivers/net/ethernet/mellanox/mlxsw/trap.h
View File

@ -62,6 +62,8 @@ enum {
MLXSW_TRAP_ID_TTLERROR = 0x53,
MLXSW_TRAP_ID_LBERROR = 0x54,
MLXSW_TRAP_ID_IPV4_OSPF = 0x55,
MLXSW_TRAP_ID_IPV4_PIM = 0x58,
MLXSW_TRAP_ID_RPF = 0x5C,
MLXSW_TRAP_ID_IP2ME = 0x5F,
MLXSW_TRAP_ID_IPV6_UNSPECIFIED_ADDRESS = 0x60,
MLXSW_TRAP_ID_IPV6_LINK_LOCAL_DEST = 0x61,
@ -89,6 +91,8 @@ enum {
MLXSW_TRAP_ID_ROUTER_ALERT_IPV4 = 0xD6,
MLXSW_TRAP_ID_ROUTER_ALERT_IPV6 = 0xD7,
MLXSW_TRAP_ID_ACL0 = 0x1C0,
/* Multicast trap used for routes with trap action */
MLXSW_TRAP_ID_ACL1 = 0x1C1,
MLXSW_TRAP_ID_MAX = 0x1FF
};