xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net/mlx5: EQ, Introduce atomic notifier chain subscription API

Browse Source 
Use atomic_notifier_chain to fire firmware events at internal mlx5 core
components such as eswitch/fpga/clock/FW tracer/etc.., this is to
avoid explicit calls from low level mlx5_core to upper components and to
simplify the mlx5_core API for future developments.

Simply provide register/unregister notifiers API and call the notifier
chain on firmware async events.

Example: to subscribe to a FW event:
struct mlx5_nb port_event;

MLX5_NB_INIT(&port_event, port_event_handler, PORT_CHANGE);
mlx5_eq_notifier_register(mdev, &port_event);

where:
 - port_event_handler is the notifier block callback.
 - PORT_EVENT is the suffix of MLX5_EVENT_TYPE_PORT_CHANGE.

The above will guarantee that port_event_handler will receive all FW
events of the type MLX5_EVENT_TYPE_PORT_CHANGE.

To receive all FW/HW events one can subscribe to
MLX5_EVENT_TYPE_NOTIFY_ANY.

The next few patches will start moving all mlx5 core components to use
this new API and cleanup mlx5_eq_async_int misx handler from component
explicit calls and specific logic.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Saeed Mahameed
2018-11-20 14:12:18 -08:00
parent 6d2d6fc83a
commit 0f597ed435
5 changed files with 72 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
include/linux/mlx5/device.h
View File

@@ -301,9 +301,15 @@ enum {
MLX5_EVENT_QUEUE_TYPE_DCT = 6,
};
/* mlx5 components can subscribe to any one of these events via
* mlx5_eq_notifier_register API.
*/
enum mlx5_event {
/* Special value to subscribe to any event */
MLX5_EVENT_TYPE_NOTIFY_ANY = 0x0,
/* HW events enum start: comp events are not subscribable */
MLX5_EVENT_TYPE_COMP = 0x0,
/* HW Async events enum start: subscribable events */
MLX5_EVENT_TYPE_PATH_MIG = 0x01,
MLX5_EVENT_TYPE_COMM_EST = 0x02,
MLX5_EVENT_TYPE_SQ_DRAINED = 0x03,
@@ -341,6 +347,8 @@ enum mlx5_event {
MLX5_EVENT_TYPE_FPGA_QP_ERROR = 0x21,
MLX5_EVENT_TYPE_DEVICE_TRACER = 0x26,
MLX5_EVENT_TYPE_MAX = MLX5_EVENT_TYPE_DEVICE_TRACER + 1,
};
enum {

16
include/linux/mlx5/eq.h
View File

@@ -4,8 +4,6 @@
#ifndef MLX5_CORE_EQ_H
#define MLX5_CORE_EQ_H
#include <linux/mlx5/driver.h>
enum {
MLX5_EQ_PAGEREQ_IDX = 0,
MLX5_EQ_CMD_IDX = 1,
@@ -22,6 +20,7 @@ enum {
#define MLX5_NUM_SPARE_EQE (0x80)
struct mlx5_eq;
struct mlx5_core_dev;
struct mlx5_eq_param {
u8 index;
@@ -57,4 +56,17 @@ static inline u32 mlx5_eq_update_cc(struct mlx5_eq *eq, u32 cc)
return cc;
}
struct mlx5_nb {
struct notifier_block nb;
u8 event_type;
};
#define mlx5_nb_cof(ptr, type, member) \
(container_of(container_of(ptr, struct mlx5_nb, nb), type, member))
#define MLX5_NB_INIT(name, handler, event) do { \
(name)->nb.notifier_call = handler; \
(name)->event_type = MLX5_EVENT_TYPE_##event; \
} while (0)
#endif /* MLX5_CORE_EQ_H */