Hi Doug, This series from Raed introduces an API to read via the verbs interface hardware counters for a specific IB Flow object. The above enables a user space application to read the real time information on its various Flow Steering objects and take run time decisions accordingly. The first 8 patches of the series introduce the generic interface for using counters then there are 2 patches which enable the flow steering counters on top of the API. The last 6 patches are the mlx5 driver implementation of the counters verbs. We may add in the future on top of the API an option to read also QP, WQ and other objects' counters. The series follows an RFC [1] which introduced the motivation, the expected usage and the API. More specifically, A generic interface with the following functionality is presented: - An option to know per device how many counter sets it exposes by using some extension of the ib_query_device_ex() verb. (i.e. max_counter_sets). - Per counter set there is an API to get its metadata by using a new verb named ib_describe_counter_set(), it gets a counter set id in range of [0,max_counter_sets - 1] and return the counter set information. Some of the metadata is IB generic (e.g. counter set type, num counters in the set, etc.) while other is some specific driver information (e.g. counters names). - Introduce counter set object named 'ib_counter_set' and its create/destroy verbs. Post a successful creation the counter_set object can be attached to an IB object based on its type. (e.g. Flow, QP, etc.) - Introduce the ib_query_counter_set() verb, it enables the user to read the hardware counters which are associated with the counter set. - Introduce a new steering specification from type count (i.e. ib_flow_spec_action_count) which gets a previously created counter_id. By creating a flow steering object with a counter, its counters can be read by the ib_query_counter_set() verb. A detailed information on each API and its properties appear in the commit logs and in the relevant H file. [1] RFC - https://www.spinics.net/lists/linux-rdma/msg47355.html Yishai Boris Pismenny (1): IB/mlx5: Pass mlx5_flow_act struct instead of multiple arguments Raed Salem (15): IB/core: Expose max_counter_sets capability IB/uverbs: Expose max_counter_sets capability IB/core: Introduce counter set describe verb IB/uverbs: Add describe counter set support IB/core: Introduce counter set object and its create/destroy verbs IB/uverbs: Add create/destroy counter set support IB/core: Introduce counter set query verb IB/uverbs: Add query counter set support IB/core: Add support for flow counter set IB/uverbs: Add support for flow counter set net/mlx5: Export flow counter related API net/mlx5: Expand mlx5_fc_query_cached to return absolute counters values IB/mlx5: Add counter set operations IB/mlx5: Add flow counter set support IB/mlx5: Expose max_counter_sets capability drivers/infiniband/core/uverbs.h | 5 + drivers/infiniband/core/uverbs_cmd.c | 314 ++++++++++++++++++ drivers/infiniband/core/uverbs_main.c | 4 + drivers/infiniband/core/uverbs_std_types.c | 15 +- drivers/infiniband/core/verbs.c | 91 +++++- drivers/infiniband/hw/mlx5/main.c | 364 +++++++++++++++++++-- drivers/infiniband/hw/mlx5/mlx5_ib.h | 31 ++ drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 6 +- drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c | 1 + drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.h | 2 - drivers/net/ethernet/mellanox/mlx5/core/fs_core.h | 23 -- .../net/ethernet/mellanox/mlx5/core/fs_counters.c | 17 +- include/linux/mlx5/fs.h | 31 +- include/rdma/ib_verbs.h | 74 +++++ include/rdma/uverbs_std_types.h | 1 + include/uapi/rdma/ib_user_ioctl_verbs.h | 1 + include/uapi/rdma/ib_user_verbs.h | 75 ++++- include/uapi/rdma/mlx5-abi.h | 16 + 18 files changed, 1016 insertions(+), 55 deletions(-) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
