This is a note to let you know that I've just added the patch titled
net/mlx4_en: Change default QoS settings
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mlx4_en-change-default-qos-settings.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Apr 9 17:09:24 CEST 2018
From: Moni Shoua <monis@xxxxxxxxxxxx>
Date: Thu, 28 Dec 2017 16:26:11 +0200
Subject: net/mlx4_en: Change default QoS settings
From: Moni Shoua <monis@xxxxxxxxxxxx>
[ Upstream commit a42b63c1ac1986f17f71bc91a6b0aaa14d4dae71 ]
Change the default mapping between TC and TCG as follows:
Prio | TC/TCG
| from to
| (set by FW) (set by SW)
---------+-----------------------------------
0 | 0/0 0/7
1 | 1/0 0/6
2 | 2/0 0/5
3 | 3/0 0/4
4 | 4/0 0/3
5 | 5/0 0/2
6 | 6/0 0/1
7 | 7/0 0/0
These new settings cause that a pause frame for any prio stops
traffic for all prios.
Fixes: 564c274c3df0 ("net/mlx4_en: DCB QoS support")
Signed-off-by: Moni Shoua <monis@xxxxxxxxxxxx>
Signed-off-by: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c | 5 +++++
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 7 +++++++
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 1 +
3 files changed, 13 insertions(+)
--- a/drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c
@@ -310,6 +310,7 @@ static int mlx4_en_ets_validate(struct m
}
switch (ets->tc_tsa[i]) {
+ case IEEE_8021QAZ_TSA_VENDOR:
case IEEE_8021QAZ_TSA_STRICT:
break;
case IEEE_8021QAZ_TSA_ETS:
@@ -347,6 +348,10 @@ static int mlx4_en_config_port_scheduler
/* higher TC means higher priority => lower pg */
for (i = IEEE_8021QAZ_MAX_TCS - 1; i >= 0; i--) {
switch (ets->tc_tsa[i]) {
+ case IEEE_8021QAZ_TSA_VENDOR:
+ pg[i] = MLX4_EN_TC_VENDOR;
+ tc_tx_bw[i] = MLX4_EN_BW_MAX;
+ break;
case IEEE_8021QAZ_TSA_STRICT:
pg[i] = num_strict++;
tc_tx_bw[i] = MLX4_EN_BW_MAX;
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -3125,6 +3125,13 @@ int mlx4_en_init_netdev(struct mlx4_en_d
priv->msg_enable = MLX4_EN_MSG_LEVEL;
#ifdef CONFIG_MLX4_EN_DCB
if (!mlx4_is_slave(priv->mdev->dev)) {
+ u8 prio;
+
+ for (prio = 0; prio < IEEE_8021QAZ_MAX_TCS; ++prio) {
+ priv->ets.prio_tc[prio] = prio;
+ priv->ets.tc_tsa[prio] = IEEE_8021QAZ_TSA_VENDOR;
+ }
+
priv->dcbx_cap = DCB_CAP_DCBX_VER_CEE | DCB_CAP_DCBX_HOST |
DCB_CAP_DCBX_VER_IEEE;
priv->flags |= MLX4_EN_DCB_ENABLED;
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -472,6 +472,7 @@ struct mlx4_en_frag_info {
#define MLX4_EN_BW_MIN 1
#define MLX4_EN_BW_MAX 100 /* Utilize 100% of the line */
+#define MLX4_EN_TC_VENDOR 0
#define MLX4_EN_TC_ETS 7
enum dcb_pfc_type {
Patches currently in stable-queue which might be from monis@xxxxxxxxxxxx are
queue-4.9/net-mlx4_en-change-default-qos-settings.patch