Re: [PATCH v4 0/3] RDMA/rxe: Add RDMA Atomic Write operation

[Leon Romanovsky <leon@kernel.org>]

On Mon, Apr 18, 2022 at 02:12:41PM +0800, Xiao Yang wrote:
> The IB SPEC v1.5[1] defined new RDMA Atomic Write operation. This
> patchset makes SoftRoCE support new RDMA Atomic Write on RC service.
> 
> I add ibv_wr_rdma_atomic_write() and a rdma_atomic_write example on my
> rdma-core repository[2].  You can verify the patchset by building and
> running the rdma_atomic_write example.
> server:
> $ ./rdma_atomic_write_server -s [server_address] -p [port_number]
> client:
> $ ./rdma_atomic_write_client -s [server_address] -p [port_number]

We need PR to official rdma-core repo with pyverbs test to consider this
code for merge.

Thanks

> 
> [1]: https://www.infinibandta.org/wp-content/uploads/2021/08/IBTA-Overview-of-IBTA-Volume-1-Release-1.5-and-MPE-2021-08-17-Secure.pptx
> [2]: https://github.com/yangx-jy/rdma-core/tree/new_api_with_point
> 
> v3->v4:
> 1) Rebase on current wip/jgg-for-next
> 2) Fix a compiler error on 32-bit arch (e.g. parisc) by disabling RDMA Atomic Write
> 3) Replace 64-bit value with 8-byte array for RDMA Atomic Write
> 
> V2->V3:
> 1) Rebase
> 2) Add RDMA Atomic Write attribute for rxe device
> 
> V1->V2:
> 1) Set IB_OPCODE_RDMA_ATOMIC_WRITE to 0x1D
> 2) Add rdma.atomic_wr in struct rxe_send_wr and use it to pass the atomic write value
> 3) Use smp_store_release() to ensure that all prior operations have completed
> 
> Xiao Yang (3):
>   RDMA/rxe: Rename send_atomic_ack() and atomic member of struct
>     resp_res
>   RDMA/rxe: Support RDMA Atomic Write operation
>   RDMA/rxe: Add RDMA Atomic Write attribute for rxe device
> 
>  drivers/infiniband/sw/rxe/rxe_comp.c   |  4 ++
>  drivers/infiniband/sw/rxe/rxe_opcode.c | 19 ++++++++
>  drivers/infiniband/sw/rxe/rxe_opcode.h |  3 ++
>  drivers/infiniband/sw/rxe/rxe_param.h  |  5 +++
>  drivers/infiniband/sw/rxe/rxe_qp.c     |  4 +-
>  drivers/infiniband/sw/rxe/rxe_req.c    | 13 +++++-
>  drivers/infiniband/sw/rxe/rxe_resp.c   | 61 ++++++++++++++++++++------
>  drivers/infiniband/sw/rxe/rxe_verbs.h  |  2 +-
>  include/rdma/ib_pack.h                 |  2 +
>  include/rdma/ib_verbs.h                |  3 ++
>  include/uapi/rdma/ib_user_verbs.h      |  4 ++
>  include/uapi/rdma/rdma_user_rxe.h      |  1 +
>  12 files changed, 103 insertions(+), 18 deletions(-)
> 
> -- 
> 2.34.1
> 
> 
>