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_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
