The IB SPEC v1.5[1][2] defined new RDMA operations (Atomic Write and Flush). 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[3]. 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/ibta-specification/ # login required [2]: 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 [3]: https://github.com/yangx-jy/rdma-core/tree/new_api BTW: This patchset also needs the following fix. https://www.spinics.net/lists/linux-rdma/msg107838.html 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 (2): RDMA/rxe: Rename send_atomic_ack() and atomic member of struct resp_res RDMA/rxe: Support RDMA Atomic Write operation drivers/infiniband/sw/rxe/rxe_comp.c | 4 ++ drivers/infiniband/sw/rxe/rxe_opcode.c | 18 +++++++++ drivers/infiniband/sw/rxe/rxe_opcode.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 | 53 +++++++++++++++++++------- drivers/infiniband/sw/rxe/rxe_verbs.h | 2 +- include/rdma/ib_pack.h | 2 + include/rdma/ib_verbs.h | 2 + include/uapi/rdma/ib_user_verbs.h | 2 + include/uapi/rdma/rdma_user_rxe.h | 1 + 11 files changed, 85 insertions(+), 18 deletions(-) -- 2.23.0
