From 0f597ed435b9ea1296e25474b762bedceba97a50 Mon Sep 17 00:00:00 2001 From: Saeed Mahameed Date: Tue, 20 Nov 2018 14:12:18 -0800 Subject: net/mlx5: EQ, Introduce atomic notifier chain subscription API 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 --- include/linux/mlx5/device.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'include/linux/mlx5/device.h') diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h index e326524bafcc..f7c8bebfe472 100644 --- a/include/linux/mlx5/device.h +++ b/include/linux/mlx5/device.h @@ -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 { -- cgit v1.2.3