kernel/include/linux/mlx5/eq.h, branch linux-5.2.y

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

2018-11-26T21:39:33Z

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

{net,IB}/mlx5: Move Page fault EQ and ODP logic to RDMA

2018-11-20T18:07:33Z

Use the new generic EQ API to move all ODP RDMA data structures and logic form mlx5 core driver into mlx5_ib driver. Signed-off-by: Saeed Mahameed Reviewed-by: Leon Romanovsky Reviewed-by: Tariq Toukan Acked-by: Jason Gunthorpe Signed-off-by: Leon Romanovsky

net/mlx5: EQ, Generic EQ

2018-11-20T18:07:05Z

Add mlx5_eq_{create/destroy}_generic APIs and EQE access methods, for mlx5 core consumers generic EQs. This API will be used in downstream patch to move page fault (RDMA ODP) EQ logic into mlx5_ib rdma driver, hence it will use a generic EQ. Current mlx5 EQ allocation scheme: On load mlx5 allocates 4 (for async) + #cores (for data completions) MSIX vectors, mlx5 core will assign 3 MSIX vectors for internal async EQs and will use all of the #cores MSIX vectors for completion EQs, (One vector is going to be reserved for a generic EQ). After this patch an external user (e.g mlx5_ib) of mlx5_core can use this new API to create new generic EQs with the reserved msix vector index for that eq. Signed-off-by: Saeed Mahameed Reviewed-by: Leon Romanovsky Reviewed-by: Tariq Toukan Signed-off-by: Leon Romanovsky