From 14fe2471c62816ba82546fb68369d957c3a58b59 Mon Sep 17 00:00:00 2001
From: Maor Dickman <maord@nvidia.com>
Date: Thu, 7 Oct 2021 16:05:38 +0300
Subject: [PATCH] net/mlx5: Lag, change multipath and bonding to be mutually
exclusive
Both multipath and bonding events are changing the HW LAG state
independently.
Handling one of the features events while the other is already
enabled can cause unwanted behavior, for example handling
bonding event while multipath enabled will disable the lag and
cause multipath to stop working.
Fix it by ignoring bonding event while in multipath and ignoring FIB
events while in bonding mode.
Fixes: 544fe7c2e654 ("net/mlx5e: Activate HW multipath and handle port affinity based on FIB events")
Signed-off-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 2 ++
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 2 ++
drivers/net/ethernet/mellanox/mlx5/core/lag.c | 4 ++++
drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c | 13 ++++++++-----
drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h | 2 ++
include/linux/mlx5/driver.h | 1 -
6 files changed, 18 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
index b4e9868187947..4a13ef561587d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
@@ -10,6 +10,8 @@
#include "en_tc.h"
#include "rep/tc.h"
#include "rep/neigh.h"
+#include "lag.h"
+#include "lag_mp.h"
struct mlx5e_tc_tun_route_attr {
struct net_device *out_dev;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index ba81647920167..129ff7e0d65cc 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -67,6 +67,8 @@
#include "lib/fs_chains.h"
#include "diag/en_tc_tracepoint.h"
#include <asm/div64.h>
+#include "lag.h"
+#include "lag_mp.h"
#define nic_chains(priv) ((priv)->fs.tc.chains)
#define MLX5_MH_ACT_SZ MLX5_UN_SZ_BYTES(set_add_copy_action_in_auto)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag.c
index ca5690b0a7abb..d2105c1635c34 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag.c
@@ -442,6 +442,10 @@ static void mlx5_do_bond(struct mlx5_lag *ldev)
if (!mlx5_lag_is_ready(ldev)) {
do_bond = false;
} else {
+ /* VF LAG is in multipath mode, ignore bond change requests */
+ if (mlx5_lag_is_multipath(dev0))
+ return;
+
tracker = ldev->tracker;
do_bond = tracker.is_bonded && mlx5_lag_check_prereq(ldev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c
index f239b352a58a1..21fdaf708f1fe 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c
@@ -9,20 +9,23 @@
#include "eswitch.h"
#include "lib/mlx5.h"
+static bool __mlx5_lag_is_multipath(struct mlx5_lag *ldev)
+{
+ return !!(ldev->flags & MLX5_LAG_FLAG_MULTIPATH);
+}
+
static bool mlx5_lag_multipath_check_prereq(struct mlx5_lag *ldev)
{
if (!mlx5_lag_is_ready(ldev))
return false;
+ if (__mlx5_lag_is_active(ldev) && !__mlx5_lag_is_multipath(ldev))
+ return false;
+
return mlx5_esw_multipath_prereq(ldev->pf[MLX5_LAG_P1].dev,
ldev->pf[MLX5_LAG_P2].dev);
}
-static bool __mlx5_lag_is_multipath(struct mlx5_lag *ldev)
-{
- return !!(ldev->flags & MLX5_LAG_FLAG_MULTIPATH);
-}
-
bool mlx5_lag_is_multipath(struct mlx5_core_dev *dev)
{
struct mlx5_lag *ldev;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h
index 729c839397a89..dea199e79beda 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag_mp.h
@@ -24,12 +24,14 @@ struct lag_mp {
void mlx5_lag_mp_reset(struct mlx5_lag *ldev);
int mlx5_lag_mp_init(struct mlx5_lag *ldev);
void mlx5_lag_mp_cleanup(struct mlx5_lag *ldev);
+bool mlx5_lag_is_multipath(struct mlx5_core_dev *dev);
#else /* CONFIG_MLX5_ESWITCH */
static inline void mlx5_lag_mp_reset(struct mlx5_lag *ldev) {};
static inline int mlx5_lag_mp_init(struct mlx5_lag *ldev) { return 0; }
static inline void mlx5_lag_mp_cleanup(struct mlx5_lag *ldev) {}
+bool mlx5_lag_is_multipath(struct mlx5_core_dev *dev) { return false; }
#endif /* CONFIG_MLX5_ESWITCH */
#endif /* __MLX5_LAG_MP_H__ */
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index e23417424373f..f17d2101af7a0 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1138,7 +1138,6 @@ int mlx5_cmd_create_vport_lag(struct mlx5_core_dev *dev);
int mlx5_cmd_destroy_vport_lag(struct mlx5_core_dev *dev);
bool mlx5_lag_is_roce(struct mlx5_core_dev *dev);
bool mlx5_lag_is_sriov(struct mlx5_core_dev *dev);
-bool mlx5_lag_is_multipath(struct mlx5_core_dev *dev);
bool mlx5_lag_is_active(struct mlx5_core_dev *dev);
bool mlx5_lag_is_master(struct mlx5_core_dev *dev);
bool mlx5_lag_is_shared_fdb(struct mlx5_core_dev *dev);
--
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