netdev - [PATCH net-next 02/14] mlxsw: spectrum_trap: Move layer 3 exceptions to exceptions trap group

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Message-Id: <20200529183649.1602091-3-idosch@idosch.org>
Date:   Fri, 29 May 2020 21:36:37 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...lanox.com,
        mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 02/14] mlxsw: spectrum_trap: Move layer 3 exceptions to exceptions trap group

From: Ido Schimmel <idosch@...lanox.com>

The layer 3 exceptions are still subject to the same trap policer, so
nothing changes, but user space can choose to assign a different one.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Reviewed-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/reg.h     |  1 +
 .../ethernet/mellanox/mlxsw/spectrum_trap.c   | 40 +++++++++++--------
 2 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index 38fa7304af0c..030d6f9766d2 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -5552,6 +5552,7 @@ enum mlxsw_reg_htgt_trap_group {
 	MLXSW_REG_HTGT_TRAP_GROUP_SP_DUMMY,
 	MLXSW_REG_HTGT_TRAP_GROUP_SP_L2_DISCARDS,
 	MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_DISCARDS,
+	MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_EXCEPTIONS,
 	MLXSW_REG_HTGT_TRAP_GROUP_SP_TUNNEL_DISCARDS,
 	MLXSW_REG_HTGT_TRAP_GROUP_SP_ACL_DISCARDS,
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
index f4b812276a5a..dc2217f1a07f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
@@ -212,6 +212,11 @@ static const struct mlxsw_sp_trap_group_item mlxsw_sp_trap_group_items_arr[] = {
 		.hw_group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_DISCARDS,
 		.priority = 0,
 	},
+	{
+		.group = DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
+		.hw_group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_EXCEPTIONS,
+		.priority = 2,
+	},
 	{
 		.group = DEVLINK_TRAP_GROUP_GENERIC(TUNNEL_DROPS, 1),
 		.hw_group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_TUNNEL_DISCARDS,
@@ -332,56 +337,59 @@ static const struct mlxsw_sp_trap_item mlxsw_sp_trap_items_arr[] = {
 		},
 	},
 	{
-		.trap = MLXSW_SP_TRAP_EXCEPTION(MTU_ERROR, L3_DROPS),
+		.trap = MLXSW_SP_TRAP_EXCEPTION(MTU_ERROR, L3_EXCEPTIONS),
 		.listeners_arr = {
-			MLXSW_SP_RXL_EXCEPTION(MTUERROR, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(MTUERROR, L3_EXCEPTIONS,
 					       TRAP_TO_CPU),
 		},
 	},
 	{
-		.trap = MLXSW_SP_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS),
+		.trap = MLXSW_SP_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
 		.listeners_arr = {
-			MLXSW_SP_RXL_EXCEPTION(TTLERROR, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(TTLERROR, L3_EXCEPTIONS,
 					       TRAP_TO_CPU),
 		},
 	},
 	{
-		.trap = MLXSW_SP_TRAP_EXCEPTION(RPF, L3_DROPS),
+		.trap = MLXSW_SP_TRAP_EXCEPTION(RPF, L3_EXCEPTIONS),
 		.listeners_arr = {
-			MLXSW_SP_RXL_EXCEPTION(RPF, L3_DISCARDS, TRAP_TO_CPU),
+			MLXSW_SP_RXL_EXCEPTION(RPF, L3_EXCEPTIONS, TRAP_TO_CPU),
 		},
 	},
 	{
-		.trap = MLXSW_SP_TRAP_EXCEPTION(REJECT_ROUTE, L3_DROPS),
+		.trap = MLXSW_SP_TRAP_EXCEPTION(REJECT_ROUTE, L3_EXCEPTIONS),
 		.listeners_arr = {
-			MLXSW_SP_RXL_EXCEPTION(RTR_INGRESS1, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(RTR_INGRESS1, L3_EXCEPTIONS,
 					       TRAP_TO_CPU),
 		},
 	},
 	{
-		.trap = MLXSW_SP_TRAP_EXCEPTION(UNRESOLVED_NEIGH, L3_DROPS),
+		.trap = MLXSW_SP_TRAP_EXCEPTION(UNRESOLVED_NEIGH,
+						L3_EXCEPTIONS),
 		.listeners_arr = {
-			MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV4, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV4, L3_EXCEPTIONS,
 					       TRAP_TO_CPU),
-			MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV6, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV6, L3_EXCEPTIONS,
 					       TRAP_TO_CPU),
-			MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER3, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER3, L3_EXCEPTIONS,
 					       TRAP_EXCEPTION_TO_CPU),
 		},
 	},
 	{
 		.trap = MLXSW_SP_TRAP_EXCEPTION(IPV4_LPM_UNICAST_MISS,
-						L3_DROPS),
+						L3_EXCEPTIONS),
 		.listeners_arr = {
-			MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM4, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM4,
+					       L3_EXCEPTIONS,
 					       TRAP_EXCEPTION_TO_CPU),
 		},
 	},
 	{
 		.trap = MLXSW_SP_TRAP_EXCEPTION(IPV6_LPM_UNICAST_MISS,
-						L3_DROPS),
+						L3_EXCEPTIONS),
 		.listeners_arr = {
-			MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM6, L3_DISCARDS,
+			MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM6,
+					       L3_EXCEPTIONS,
 					       TRAP_EXCEPTION_TO_CPU),
 		},
 	},
-- 
2.26.2