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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 <yishaih@mellanox.com>
Signed-off-by: Raed Salem <raeds@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Raed Salem 2018-05-31 16:43:33 +03:00 committed by Leon Romanovsky
parent d9a5a6441e
commit 51d7a53874
1 changed files with 14 additions and 0 deletions
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14
include/rdma/ib_verbs.h
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@ -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