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net/mlx5e: Add listener to trap event 

Add support for listening to blocking events in the ETH driver. Listen
on trap event. If received, call mlx5e_handle_trap_event() which:
1) Verifies if driver needs open/close trap-RQ with respect to the
active traps count.
2) Inspects trap id and its action (trap/drop) and add/remove the flow
steering rule accordingly.
Otherwise, return an error.

Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Aya Levin 2021-01-26 15:24:17 -08:00 committed by Jakub Kicinski
parent 5543e989fe
commit 70038b73e4
2 changed files with 36 additions and 0 deletions
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1
drivers/net/ethernet/mellanox/mlx5/core/en.h
View File

@ -859,6 +859,7 @@ struct mlx5e_priv {
u16 q_counter;
u16 drop_rq_q_counter;
struct notifier_block events_nb;
struct notifier_block blocking_events_nb;
int num_tc_x_num_ch;
struct udp_tunnel_nic_info nic_info;

35
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -66,6 +66,7 @@
#include "lib/mlx5.h"
#include "en/ptp.h"
#include "qos.h"
#include "en/trap.h"
bool mlx5e_check_fragmented_striding_rq_cap(struct mlx5_core_dev *mdev)
{
@ -212,6 +213,33 @@ static void mlx5e_disable_async_events(struct mlx5e_priv *priv)
mlx5_notifier_unregister(priv->mdev, &priv->events_nb);
}
static int blocking_event(struct notifier_block *nb, unsigned long event, void *data)
{
struct mlx5e_priv *priv = container_of(nb, struct mlx5e_priv, blocking_events_nb);
int err;
switch (event) {
case MLX5_DRIVER_EVENT_TYPE_TRAP:
err = mlx5e_handle_trap_event(priv, data);
break;
default:
netdev_warn(priv->netdev, "Sync event: Unknouwn event %ld\n", event);
err = -EINVAL;
}
return err;
}
static void mlx5e_enable_blocking_events(struct mlx5e_priv *priv)
{
priv->blocking_events_nb.notifier_call = blocking_event;
mlx5_blocking_notifier_register(priv->mdev, &priv->blocking_events_nb);
}
static void mlx5e_disable_blocking_events(struct mlx5e_priv *priv)
{
mlx5_blocking_notifier_unregister(priv->mdev, &priv->blocking_events_nb);
}
static inline void mlx5e_build_umr_wqe(struct mlx5e_rq *rq,
struct mlx5e_icosq *sq,
struct mlx5e_umr_wqe *wqe)
@ -5341,6 +5369,7 @@ static void mlx5e_nic_enable(struct mlx5e_priv *priv)
mlx5_lag_add(mdev, netdev);
mlx5e_enable_async_events(priv);
mlx5e_enable_blocking_events(priv);
if (mlx5e_monitor_counter_supported(priv))
mlx5e_monitor_counter_init(priv);
@ -5378,6 +5407,12 @@ static void mlx5e_nic_disable(struct mlx5e_priv *priv)
if (mlx5e_monitor_counter_supported(priv))
mlx5e_monitor_counter_cleanup(priv);
mlx5e_disable_blocking_events(priv);
if (priv->en_trap) {
mlx5e_deactivate_trap(priv);
mlx5e_close_trap(priv->en_trap);
priv->en_trap = NULL;
}
mlx5e_disable_async_events(priv);
mlx5_lag_remove(mdev);
mlx5_vxlan_reset_to_default(mdev->vxlan);