[PATCH for-next 0/4] RDMA/erdma: Add a new doorbell allocation mechanism

[Cheng Xu <chengyou@linux.alibaba.com>]

Hi,

This series adds a new doorbell allocation mechanism to meet the
the isolation requirement for userspace applications. Two main change
points in this patch set: One is that we extend the bar space for doorbell
allocation, and the other one is that we associate QPs/CQs with the
allocated doorbells for authorization. We also keep the original doorbell
mechanism for compatibility, but only used under CAP_SYS_RAWIO to prevent
non-privileged access, which suggested by Jason before.

- #1 configures the current PAGE_SIZE to hardware, so that hardware can
  organize the mmio space properly.
- #2~#3 implement the new doorbell allocation mechanism.
- #4 refactors the doorbell allocation part to make code more simpler and
  cleaner.

Thanks,
Cheng Xu

Cheng Xu (4):
  RDMA/erdma: Configure PAGE_SIZE to hardware
  RDMA/erdma: Allocate doorbell resources from hardware
  RDMA/erdma: Associate QPs/CQs with doorbells for authorization
  RDMA/erdma: Refactor the original doorbell allocation mechanism

 drivers/infiniband/hw/erdma/erdma.h       |  16 +-
 drivers/infiniband/hw/erdma/erdma_hw.h    |  64 ++++++--
 drivers/infiniband/hw/erdma/erdma_main.c  |  53 +++----
 drivers/infiniband/hw/erdma/erdma_verbs.c | 178 +++++++++++++---------
 drivers/infiniband/hw/erdma/erdma_verbs.h |  13 +-
 5 files changed, 183 insertions(+), 141 deletions(-)

-- 
2.31.1