[rdma-core,0/4] libhns: Add support for direct WQE

Message

Weihang Li May 28, 2021, 9:32 a.m. UTC

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 fix an issue on interface to write doorbell, the feature
is enabled at last.

The kernel parts is named "RDMA/hns: Add support for userspace Direct WQE".

Lang Cheng (1):
  libhns: Fixes data type when writing doorbell

Weihang Li (1):
  Update kernel headers

Xi Wang (1):
  libhns: Refactor hns uar mmap flow

Yixing Liu (1):
  libhns: Add support for direct wqe

 kernel-headers/rdma/hns-abi.h    |  6 +++
 providers/hns/hns_roce_u.c       | 76 ++++++++++++++++++++++++--------------
 providers/hns/hns_roce_u.h       | 19 +++++++++-
 providers/hns/hns_roce_u_db.h    | 13 ++-----
 providers/hns/hns_roce_u_hw_v1.c | 17 +++++----
 providers/hns/hns_roce_u_hw_v2.c | 80 ++++++++++++++++++++++++++++++++--------
 providers/hns/hns_roce_u_hw_v2.h | 29 ++++++++-------
 providers/hns/hns_roce_u_verbs.c | 39 ++++++++++++++++++++
 8 files changed, 204 insertions(+), 75 deletions(-)