Hey folks, Changes in V6: - rebase to for-next(v6.1-rc1) - add Yanjun's reviewed-by except "Allow registering persistent flag for pmem MR only" - minimize pmem checking side effect # Jason - return EOPNOSUPP if HCA doesn't support flush operation These patches are going to implement a *NEW* RDMA opcode "RDMA FLUSH". In IB SPEC 1.5[1], 2 new opcodes, ATOMIC WRITE and RDMA FLUSH were added in the MEMORY PLACEMENT EXTENSIONS section. This patchset makes SoftRoCE support new RDMA FLUSH on RC service. You can verify the patchset by building and running the rdma_flush example[2]. server: $ ./rdma_flush_server -s [server_address] -p [port_number] client: $ ./rdma_flush_client -s [server_address] -p [port_number] Corresponding pyverbs and tests(tests.test_qpex.QpExTestCase.test_qp_ex_rc_rdma_flush) are also added to rdma-core [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/zhijianli88/rdma-core/tree/rdma-flush-v5 CC: Xiao Yang <yangx.jy@xxxxxxxxxxx> CC: "Gotou, Yasunori" <y-goto@xxxxxxxxxxx> CC: Jason Gunthorpe <jgg@xxxxxxxx> CC: Zhu Yanjun <zyjzyj2000@xxxxxxxxx> CC: Leon Romanovsky <leon@xxxxxxxxxx> CC: Bob Pearson <rpearsonhpe@xxxxxxxxx> CC: Mark Bloch <mbloch@xxxxxxxxxx> CC: Tom Talpey <tom@xxxxxxxxxx> CC: "Gromadzki, Tomasz" <tomasz.gromadzki@xxxxxxxxx> CC: Dan Williams <dan.j.williams@xxxxxxxxx> CC: linux-rdma@xxxxxxxxxxxxxxx CC: linux-kernel@xxxxxxxxxxxxxxx Can also access the kernel source in: https://github.com/zhijianli88/linux/tree/rdma-flush-v6 Changes log V5: https://lore.kernel.org/lkml/20220927055337.22630-12-lizhijian@xxxxxxxxxxx/t/ V4: - rework responder process - rebase to v5.19+ - remove [7/7]: RDMA/rxe: Add RD FLUSH service support since RD is not really supported V3: - Just rebase and commit log and comment updates - delete patch-1: "RDMA: mr: Introduce is_pmem", which will be combined into "Allow registering persistent flag for pmem MR only" - delete patch-7 V2: RDMA: mr: Introduce is_pmem check 1st byte to avoid crossing page boundary new scheme to check is_pmem # Dan RDMA: Allow registering MR with flush access flags combine with [03/10] RDMA/rxe: Allow registering FLUSH flags for supported device only to this patch # Jason split RDMA_FLUSH to 2 capabilities RDMA/rxe: Allow registering persistent flag for pmem MR only update commit message, get rid of confusing ib_check_flush_access_flags() # Tom RDMA/rxe: Implement RC RDMA FLUSH service in requester side extend flush to include length field. # Tom and Tomasz RDMA/rxe: Implement flush execution in responder side adjust start for WHOLE MR level # Tom don't support DMA mr for flush # Tom check flush return value RDMA/rxe: Enable RDMA FLUSH capability for rxe device adjust patch's order. move it here from [04/10] Li Zhijian (10): RDMA: Extend RDMA user ABI to support flush RDMA: Extend RDMA kernel verbs ABI to support flush RDMA/rxe: Extend rxe user ABI to support flush RDMA/rxe: Allow registering persistent flag for pmem MR only RDMA/rxe: Extend rxe packet format to support flush RDMA/rxe: Implement RC RDMA FLUSH service in requester side RDMA/rxe: Implement flush execution in responder side RDMA/rxe: Implement flush completion RDMA/cm: Make QP FLUSHABLE RDMA/rxe: Enable RDMA FLUSH capability for rxe device drivers/infiniband/core/cm.c | 3 +- drivers/infiniband/sw/rxe/rxe_comp.c | 4 +- drivers/infiniband/sw/rxe/rxe_hdr.h | 47 +++++++ drivers/infiniband/sw/rxe/rxe_loc.h | 1 + drivers/infiniband/sw/rxe/rxe_mr.c | 58 +++++++- drivers/infiniband/sw/rxe/rxe_opcode.c | 17 +++ drivers/infiniband/sw/rxe/rxe_opcode.h | 16 ++- drivers/infiniband/sw/rxe/rxe_param.h | 4 +- drivers/infiniband/sw/rxe/rxe_req.c | 15 +- drivers/infiniband/sw/rxe/rxe_resp.c | 176 +++++++++++++++++++++--- drivers/infiniband/sw/rxe/rxe_verbs.h | 6 + include/rdma/ib_pack.h | 3 + include/rdma/ib_verbs.h | 20 ++- include/uapi/rdma/ib_user_ioctl_verbs.h | 2 + include/uapi/rdma/ib_user_verbs.h | 16 +++ include/uapi/rdma/rdma_user_rxe.h | 7 + 16 files changed, 362 insertions(+), 33 deletions(-) -- 2.31.1
