linux-kernel - [PATCH rdma-next v2 0/7] Enable asynchronous event FD per object

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Message-Id: <20200519072711.257271-1-leon@kernel.org>
Date:   Tue, 19 May 2020 10:27:04 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>
Cc:     Leon Romanovsky <leonro@...lanox.com>,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        Yishai Hadas <yishaih@...lanox.com>
Subject: [PATCH rdma-next v2 0/7] Enable asynchronous event FD per object

From: Leon Romanovsky <leonro@...lanox.com>

Changelog:
v2:
 * Added READ_ONCE to all default_async_file calls
 * Rebased on latest rdma/wip/jgg-for-next
 * Removed uninitalized_var?()
 * Simplified uverbs_free_srq()
 * Put uverbs_finalize_uobj_create() after object is finalized
v1: https://lore.kernel.org/lkml/20200506082444.14502-1-leon@kernel.org
 * Forgot to add patch "IB/uverbs: Move QP, SRQ, WQ type and flags to UAPI"
v0: https://lore.kernel.org/lkml/20200506074049.8347-1-leon@kernel.org

-------------------------------------------------------------------------------
>From Yishai:

This series enables applicable events objects (i.e. QP, SRQ, CQ, WQ) to
be created with their own asynchronous event FD.

Before this series any affiliated event on an object was reported on the
first asynchronous event FD that was created on the context without the
ability to create and use a dedicated FD for it.

With this series we enable granularity and control for the usage per
object, according to the application's usage.

For example, a secondary process that uses the same command FD as of the
master one, can create its own objects with its dedicated event FD to be
able to get the events for them once occurred, this couldn't be done
before this series.

To achieve the above, any 'create' method for the applicable objects was
extended to get from rdma-core its optional event FD, if wasn't
supplied, the default one from the context will be used.

As we prefer to not extend the 'write' mode KABIs anymore and fully
move to the 'ioct' mode, as part of this extension QP, SRQ and WQ
create/destroy commands were introduced over 'ioctl', the CQ KABI was
extended over its existing 'ioctl' create command.

As part of moving to 'ioctl' for the above objects the frame work was
improved to abort a fully created uobject upon some later error, some
flows were consolidated with the 'write' mode and few bugs were found
and fixed.

Yishai

Jason Gunthorpe (1):
  RDMA/core: Allow the ioctl layer to abort a fully created uobject

Yishai Hadas (6):
  IB/uverbs: Refactor related objects to use their own asynchronous
    event FD
  IB/uverbs: Extend CQ to get its own asynchronous event FD
  IB/uverbs: Move QP, SRQ, WQ type and flags to UAPI
  IB/uverbs: Introduce create/destroy SRQ commands over ioctl
  IB/uverbs: Introduce create/destroy WQ commands over ioctl
  IB/uverbs: Introduce create/destroy QP commands over ioctl

 drivers/infiniband/core/Makefile              |   5 +-
 drivers/infiniband/core/rdma_core.c           |  25 +-
 drivers/infiniband/core/rdma_core.h           |   7 +-
 drivers/infiniband/core/uverbs.h              |  21 +-
 drivers/infiniband/core/uverbs_cmd.c          |  27 +-
 drivers/infiniband/core/uverbs_ioctl.c        |  22 +-
 drivers/infiniband/core/uverbs_main.c         |  16 +-
 drivers/infiniband/core/uverbs_std_types.c    |  95 -----
 drivers/infiniband/core/uverbs_std_types_cq.c |  17 +-
 drivers/infiniband/core/uverbs_std_types_mr.c |  12 +-
 drivers/infiniband/core/uverbs_std_types_qp.c | 401 ++++++++++++++++++
 .../infiniband/core/uverbs_std_types_srq.c    | 234 ++++++++++
 drivers/infiniband/core/uverbs_std_types_wq.c | 194 +++++++++
 drivers/infiniband/core/uverbs_uapi.c         |   3 +
 drivers/infiniband/hw/mlx5/devx.c             |  10 +-
 drivers/infiniband/hw/mlx5/main.c             |  24 +-
 drivers/infiniband/hw/mlx5/qos.c              |  13 +-
 include/rdma/ib_verbs.h                       |  48 ++-
 include/rdma/uverbs_ioctl.h                   |   3 +
 include/rdma/uverbs_std_types.h               |   2 +-
 include/rdma/uverbs_types.h                   |   3 +-
 include/uapi/rdma/ib_user_ioctl_cmds.h        |  81 ++++
 include/uapi/rdma/ib_user_ioctl_verbs.h       |  43 ++
 23 files changed, 1122 insertions(+), 184 deletions(-)
 create mode 100644 drivers/infiniband/core/uverbs_std_types_qp.c
 create mode 100644 drivers/infiniband/core/uverbs_std_types_srq.c
 create mode 100644 drivers/infiniband/core/uverbs_std_types_wq.c

--
2.26.2