Expose CQ moderation to user space

Changelog:
v1->v2:
* Replaced word cookie to be CQE in commit messages.
* Added patch to rename ib_modify_cq() to be rdma_set_moderation()
v0->v1:
* Dropped comp_mask, there is already attr_mask
* Put CQ moderartion into special struct instead of general struct
* ib_uverbs_ex_modify_cq

------------------------------------------------------------------------------
This patch set exposes CQ moderation. This will allow to moderate number of CQEs needed to create an event. Such change brings performance improvement by reducing pressure on application to receive event per-CQE.

The proposed semantics follows the well-established kernel semantics.
* cq_max_count - defines the number of cookies needed to create an event. * cq_period - defines the timeout between last event and a new one
that will occur even if cq_max_count was not reached

The patches are available in the git repository at:
git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git tags/rdma-next-2017-11-13

Thanks
---------------------------------------

Leon Romanovsky (1):
RDMA/core: Rename kernel modify_cq to better describe its usage

Yonatan Cohen (6):
IB/uverbs: Allow CQ moderation with modify CQ IB/mlx4: Exposing modify CQ callback to uverbs layer IB/mlx5: Exposing modify CQ callback to uverbs layer IB/uverbs: Add CQ moderation capability to query_device IB/mlx4: Add CQ moderation capability to query_device IB/mlx5: Add CQ moderation capability to query_device

 drivers/infiniband/core/uverbs.h             |  1 +
 drivers/infiniband/core/uverbs_cmd.c         | 51 ++++++++++++++++++++++++++++
 drivers/infiniband/core/uverbs_main.c        |  1 +
 drivers/infiniband/core/verbs.c              |  4 +--
 drivers/infiniband/hw/mlx4/main.c            |  6 ++++
 drivers/infiniband/hw/mlx4/mlx4_ib.h         |  1 +
 drivers/infiniband/hw/mlx5/cq.c              |  3 ++
 drivers/infiniband/hw/mlx5/main.c            | 10 +++++-
 drivers/infiniband/ulp/ipoib/ipoib_ethtool.c |  5 +--
 include/linux/mlx4/cq.h                      |  3 ++
 include/linux/mlx5/cq.h                      |  3 ++
 include/rdma/ib_verbs.h                      | 14 ++++++--
 include/uapi/rdma/ib_user_verbs.h            | 22 +++++++++++-
 13 files changed, 116 insertions(+), 8 deletions(-)

--
2.15.0

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