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. This series first refactor current uar mmap process to add branch for direct wqe, then the feature is enabled. The related userspace series is named "libhns: Add support for direct WQE". Changes since v1: - Remove 'inline' of two functions in #1. - Enable direct wqe by default in #2. - https://patchwork.kernel.org/project/linux-rdma/cover/1622193545-3281-1-git-send-email-liweihang@xxxxxxxxxx/ Xi Wang (1): RDMA/hns: Refactor hns uar mmap flow Yixing Liu (1): RDMA/hns: Support direct WQE of userspace drivers/infiniband/hw/hns/hns_roce_device.h | 7 ++- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 1 + drivers/infiniband/hw/hns/hns_roce_main.c | 72 +++++++++++++++++++++++++++-- drivers/infiniband/hw/hns/hns_roce_pd.c | 8 +++- drivers/infiniband/hw/hns/hns_roce_qp.c | 5 ++ include/uapi/rdma/hns-abi.h | 6 +++ 6 files changed, 90 insertions(+), 9 deletions(-) -- 2.7.4
