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Commit 51d7a538 authored by Raed Salem's avatar Raed Salem Committed by Leon Romanovsky
Browse files

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: default avatarYishai Hadas <yishaih@mellanox.com>
Signed-off-by: default avatarRaed Salem <raeds@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent d9a5a644

include/rdma/ib_verbs.h

+14 −0
Original line number Diff line number Diff line
@@ -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