Direct wqe is a mechanism to fill wqe directly into the hardware. In the case of light load, the wqe will be filled into pcie bar space of the hardware, this will reduce one memory access operation and therefore reduce the latency. The kernel parts is named "RDMA/hns: Support direct WQE of userspace". Changes since v2: * Only updated kernel-headers. * Link: https://patchwork.kernel.org/project/linux-rdma/cover/20211116150316.21925-1-liangwenpeng@xxxxxxxxxx/ Changes since v1: * Changed the mapping scheme of direct wqe. * Use SIMD instructions to load and store dwqe data, and encapsulate instructions into macros. * Link: https://patchwork.kernel.org/project/linux-rdma/cover/1622194379-59868-1-git-send-email-liweihang@xxxxxxxxxx/ Wenpeng Liang (1): Update kernel headers Yixing Liu (1): libhns: Add support for direct wqe kernel-headers/rdma/hns-abi.h | 2 ++ providers/hns/hns_roce_u.h | 5 +++- providers/hns/hns_roce_u_hw_v2.c | 44 +++++++++++++++++++++++++------- providers/hns/hns_roce_u_hw_v2.h | 31 ++++++++++++---------- providers/hns/hns_roce_u_verbs.c | 26 +++++++++++++++++-- util/mmio.h | 27 +++++++++++++++++++- 6 files changed, 109 insertions(+), 26 deletions(-) -- 2.33.0
