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net/mlx5: Driver events notifier API

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Use atomic notifier chain to fire events to mlx5 core driver
consumers (mlx5e/mlx5_ib) and provide mlx5 register/unregister notifier
API.

This API will replace the current mlx5_interface->event callback and all
the logic around it, especially the delayed events logic introduced by
commit 97834eba7c ("net/mlx5: Delay events till ib registration ends")

Which is not needed anymore with this new API where the mlx5 interface
can dynamically register/unregister its notifier.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Saeed Mahameed 2018-11-26 14:38:56 -08:00
parent 2c89156082
commit 20902be46c
3 changed files with 29 additions and 1 deletions
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25
drivers/net/ethernet/mellanox/mlx5/core/events.c
View file

@ -35,7 +35,8 @@ static struct mlx5_nb events_nbs_ref[] = {
struct mlx5_events {
struct mlx5_core_dev *dev;
struct mlx5_event_nb notifiers[ARRAY_SIZE(events_nbs_ref)];
/* driver notifier chain */
struct atomic_notifier_head nh;
/* port module events stats */
struct mlx5_pme_stats pme_stats;
};
@ -300,6 +301,7 @@ int mlx5_events_init(struct mlx5_core_dev *dev)
if (!events)
return -ENOMEM;
ATOMIC_INIT_NOTIFIER_HEAD(&events->nh);
events->dev = dev;
dev->priv.events = events;
return 0;
@ -330,3 +332,24 @@ void mlx5_events_stop(struct mlx5_core_dev *dev)
for (i = ARRAY_SIZE(events_nbs_ref) - 1; i >= 0 ; i--)
mlx5_eq_notifier_unregister(dev, &events->notifiers[i].nb);
}
int mlx5_notifier_register(struct mlx5_core_dev *dev, struct notifier_block *nb)
{
struct mlx5_events *events = dev->priv.events;
return atomic_notifier_chain_register(&events->nh, nb);
}
EXPORT_SYMBOL(mlx5_notifier_register);
int mlx5_notifier_unregister(struct mlx5_core_dev *dev, struct notifier_block *nb)
{
struct mlx5_events *events = dev->priv.events;
return atomic_notifier_chain_unregister(&events->nh, nb);
}
EXPORT_SYMBOL(mlx5_notifier_unregister);
int mlx5_notifier_call_chain(struct mlx5_events *events, unsigned int event, void *data)
{
return atomic_notifier_call_chain(&events->nh, event, data);
}

1
drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h
View file

@ -73,5 +73,6 @@ struct mlx5_pme_stats {
};
void mlx5_get_pme_stats(struct mlx5_core_dev *dev, struct mlx5_pme_stats *stats);
int mlx5_notifier_call_chain(struct mlx5_events *events, unsigned int event, void *data);
#endif

4
include/linux/mlx5/driver.h
View file

@ -46,6 +46,7 @@
#include <linux/mempool.h>
#include <linux/interrupt.h>
#include <linux/idr.h>
#include <linux/notifier.h>
#include <linux/mlx5/device.h>
#include <linux/mlx5/doorbell.h>
@ -1062,6 +1063,9 @@ struct mlx5_interface {
void *mlx5_get_protocol_dev(struct mlx5_core_dev *mdev, int protocol);
int mlx5_register_interface(struct mlx5_interface *intf);
void mlx5_unregister_interface(struct mlx5_interface *intf);
int mlx5_notifier_register(struct mlx5_core_dev *dev, struct notifier_block *nb);
int mlx5_notifier_unregister(struct mlx5_core_dev *dev, struct notifier_block *nb);
int mlx5_core_query_vendor_id(struct mlx5_core_dev *mdev, u32 *vendor_id);
int mlx5_cmd_create_vport_lag(struct mlx5_core_dev *dev);