From 51d7a5387464f1b1fee3f2db9287409189d83d65 Mon Sep 17 00:00:00 2001 From: Raed Salem Date: Thu, 31 May 2018 16:43:33 +0300 Subject: IB/core: Introduce counters read verb The user supplies counters instance and a reference to an output array of uint64_t. The driver reads the hardware counters values and writes them to the output index location in the user supplied array. All counters values are represented as uint64_t types. To be able to successfully read the data the counters must be first bound to an IB object. Downstream patches will present binding method for flow counters. Reviewed-by: Yishai Hadas Signed-off-by: Raed Salem Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- include/rdma/ib_verbs.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 4f5d9fd4f920..3769a1cc99b0 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2187,6 +2187,17 @@ struct ib_counters { atomic_t usecnt; }; +enum ib_read_counters_flags { + /* prefer read values from driver cache */ + IB_READ_COUNTERS_ATTR_PREFER_CACHED = 1 << 0, +}; + +struct ib_counters_read_attr { + u64 *counters_buff; + u32 ncounters; + u32 flags; /* use enum ib_read_counters_flags */ +}; + struct uverbs_attr_bundle; struct ib_device { @@ -2461,6 +2472,9 @@ struct ib_device { struct ib_counters * (*create_counters)(struct ib_device *device, struct uverbs_attr_bundle *attrs); int (*destroy_counters)(struct ib_counters *counters); + int (*read_counters)(struct ib_counters *counters, + struct ib_counters_read_attr *counters_read_attr, + struct uverbs_attr_bundle *attrs); /** * rdma netdev operation -- cgit v1.2.3