netdev - [PATCH net-next 2/5] mlxsw: spectrum_trap: Add ecn

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Date:   Sun, 17 Jan 2021 10:02:20 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, petrm@...dia.com,
        jiri@...dia.com, amcohen@...dia.com, mlxsw@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 2/5] mlxsw: spectrum_trap: Add ecn_mark trap

From: Petr Machata <petrm@...dia.com>

Register with devlink a new buffer drop trap, ecn_mark. Since Spectrum-1
does not support the ecn_mark trap, do it only for Spectrum-2 and above.

Reviewed-by: Jiri Pirko <jiri@...dia.com>
Signed-off-by: Petr Machata <petrm@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
index 4ef12e3e021a..45cf6c027cac 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
@@ -51,6 +51,8 @@ enum {
 enum {
 	/* Packet was early dropped. */
 	MLXSW_SP_MIRROR_REASON_INGRESS_WRED = 9,
+	/* Packet was ECN marked. */
+	MLXSW_SP_MIRROR_REASON_EGRESS_ECN = 13,
 };
 
 static int mlxsw_sp_rx_listener(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
@@ -1760,6 +1762,13 @@ mlxsw_sp2_trap_items_arr[] = {
 		},
 		.is_source = true,
 	},
+	{
+		.trap = MLXSW_SP_TRAP_BUFFER_DROP(ECN_MARK),
+		.listeners_arr = {
+			MLXSW_SP_RXL_BUFFER_DISCARD(EGRESS_ECN),
+		},
+		.is_source = true,
+	},
 };
 
 static int
-- 
2.29.2