Commit 20902be4 authored by Saeed Mahameed's avatar Saeed Mahameed
Browse files

net/mlx5: Driver events notifier API 



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 97834eba ("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: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 2c891560

drivers/net/ethernet/mellanox/mlx5/core/events.c

+24 −1
Original line number Diff line number Diff line
@@ -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);

}

drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h

+1 −0
Original line number Diff line number Diff line
@@ -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

include/linux/mlx5/driver.h

+4 −0
Original line number Diff line number Diff line
@@ -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);