This series adds an ioctl command to allocate an async event file followed by a new ioctl command to get a device context. The get device context command enables reading some core generic capabilities such as supporting an optional MR access flags by IB core and its related drivers. Once the above is enabled, a new optional MR access flag named IB_UVERBS_ACCESS_RELAXED_ORDERING is added and is used by mlx5 driver. This optional flag allows creation of relaxed ordering memory regions. Access through such MRs can improve performance by allowing the system to reorder certain accesses. As relaxed ordering is an optimization, drivers that do not support it can simply ignore it. Note: This series relies on the 'Refactoring FD usage' series [1] that was sent to rdma-next. [1] https://patchwork.kernel.org/project/linux-rdma/list/?series=225541 Yishai Jason Gunthorpe (3): RDMA/core: Add UVERBS_METHOD_ASYNC_EVENT_ALLOC RDMA/core: Remove ucontext_lock from the uverbs_destry_ufile_hw() path RDMA/uverbs: Add ioctl command to get a device context Michael Guralnik (7): net/mlx5: Expose relaxed ordering bits RDMA/uverbs: Verify MR access flags RDMA/core: Add optional access flags range RDMA/efa: Allow passing of optional access flags for MR registration RDMA/uverbs: Add new relaxed ordering memory region access flag RDMA/core: Add the core support field to METHOD_GET_CONTEXT RDMA/mlx5: Set relaxed ordering when requested drivers/infiniband/core/rdma_core.c | 21 +--- drivers/infiniband/core/uverbs.h | 3 + drivers/infiniband/core/uverbs_cmd.c | 133 ++++++++++++--------- drivers/infiniband/core/uverbs_main.c | 11 +- .../infiniband/core/uverbs_std_types_async_fd.c | 21 +++- drivers/infiniband/core/uverbs_std_types_device.c | 38 ++++++ drivers/infiniband/hw/efa/efa_verbs.c | 1 + drivers/infiniband/hw/mlx5/mlx5_ib.h | 5 +- drivers/infiniband/hw/mlx5/mr.c | 19 ++- drivers/infiniband/hw/mlx5/odp.c | 2 +- drivers/infiniband/hw/mlx5/qp.c | 2 +- include/linux/mlx5/mlx5_ifc.h | 7 +- include/rdma/ib_verbs.h | 8 +- include/uapi/rdma/ib_user_ioctl_cmds.h | 14 +++ include/uapi/rdma/ib_user_ioctl_verbs.h | 12 ++ 15 files changed, 209 insertions(+), 88 deletions(-) -- 1.8.3.1
