[RESEND PATCH v5 0/2] RDMA/rxe: Add RDMA Atomic Write operation

yangx.jy
2022-07-08T04:02:45Z

The IB SPEC v1.5[1] defined new RDMA Atomic Write operation. This
patchset makes SoftRoCE support new RDMA Atomic Write on RC service.

On my rdma-core repository[2], I have introduced RDMA Atomic Write API
for libibverbs and Pyverbs. I also have provided a rdma_atomic_write
example and test_qp_ex_rc_rdma_atomic_write python test to verify
the patchset.

The steps to run 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]

The steps to run test_qp_ex_rc_rdma_atomic_write test:
run_tests.py --dev rxe_enp0s3 --gid 1 -v test_qpex.QpExTestCase.test_qp_ex_rc_rdma_atomic_write
test_qp_ex_rc_rdma_atomic_write (tests.test_qpex.QpExTestCase) ... ok

----------------------------------------------------------------------
Ran 1 test in 0.008s

OK

[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

Note:
This patch set depends on the following patch set:
https://lore.kernel.org/linux-rdma/20220705145212.12014-1-yangx.jy@fujitsu.com/T/#t

v4->v5:
1) Rebase on current wip/jgg-for-next
2) Rewrite the implementation on responder

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 (2):
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 | 18 +++++
drivers/infiniband/sw/rxe/rxe_opcode.h | 3 +
drivers/infiniband/sw/rxe/rxe_param.h | 5 ++
drivers/infiniband/sw/rxe/rxe_req.c | 15 +++-
drivers/infiniband/sw/rxe/rxe_resp.c | 94 ++++++++++++++++++++++++--
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 +
10 files changed, 142 insertions(+), 7 deletions(-)

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2.34.1