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IB/core: Introduce counters object and its create/destroy

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A verbs application may need to get statistics and info on various aspects
of a verb object (e.g. Flow, QP, ...), in general case the application
will state which object's counters its interested in (we refer to this
action as attach), bind this new counters object to the appropriate verb
object and on later stage read their values using the counters object.

This series introduces a general API for counters object that may
accumulate any ib object counters type, bound and read on demand.

Counters instance is allocated on an IB context and belongs to that
context.  Upon successful creation the counters can be bound to a verbs
object so that hardware counter instances can be created and read.

Downstream patches in this series will introduce the attach, bind and the
read functionality.

Counters instance can be de-allocated, upon successful destruction the
related hardware resources are released.

Prior to destroy call the user must first make sure that the counters is
not being used by any IB object, e.g. not attached to any of its counted
type otherwise an EBUSY error is invoked.

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 16:43:31 +03:00 committed by Leon Romanovsky
parent 3efa38125b
commit fa9b1802d1
1 changed files with 11 additions and 0 deletions
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11
include/rdma/ib_verbs.h
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@ -2180,6 +2180,13 @@ struct ib_port_pkey_list {
struct list_head pkey_list;
};
struct ib_counters {
struct ib_device *device;
struct ib_uobject *uobject;
/* num of objects attached */
atomic_t usecnt;
};
struct uverbs_attr_bundle;
struct ib_device {
@ -2451,6 +2458,10 @@ struct ib_device {
struct ib_mr * (*reg_dm_mr)(struct ib_pd *pd, struct ib_dm *dm,
struct ib_dm_mr_attr *attr,
struct uverbs_attr_bundle *attrs);
struct ib_counters * (*create_counters)(struct ib_device *device,
struct uverbs_attr_bundle *attrs);
int (*destroy_counters)(struct ib_counters *counters);
/**
* rdma netdev operation
*