[v3,0/3] RDMA/rxe: Add RDMA Atomic Write operation

Message

Xiao Yang March 11, 2022, 11:52 a.m. UTC

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]

[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

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  |  3 +-
 drivers/infiniband/sw/rxe/rxe_qp.c     |  5 ++-
 drivers/infiniband/sw/rxe/rxe_req.c    | 11 +++++-
 drivers/infiniband/sw/rxe/rxe_resp.c   | 55 ++++++++++++++++++++------
 drivers/infiniband/sw/rxe/rxe_verbs.h  |  2 +-
 include/rdma/ib_pack.h                 |  2 +
 include/rdma/ib_verbs.h                |  4 ++
 include/uapi/rdma/ib_user_verbs.h      |  2 +
 include/uapi/rdma/rdma_user_rxe.h      |  1 +
 12 files changed, 92 insertions(+), 19 deletions(-)