RDMA/hns: Support owner mode doorbell

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The doorbell needs to store PI information into QPC, so the RoCEE should
wait for the results of storing, that is, it needs two bus operations to
complete a doorbell. When ROCEE is in SDI mode, multiple doorbells may be
interlocked because the RoCEE can only handle bus operations serially. So a
flag to mark if HIP09 is working in SDI mode is added. When the SDI flag is
set, the ROCEE will ignore the PI information of the doorbell, continue to
fetch wqe and verify its validity by it's owner_bit.

Link: https://lore.kernel.org/r/1603195493-22741-1-git-send-email-liweihang@huawei.com
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Lang Cheng 2020-10-20 20:04:53 +08:00 • committed by Jason Gunthorpe

parent dae7a75f1f

commit aba457ca89

3 changed files with 28 additions and 7 deletions

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4

drivers/infiniband/hw/hns/hns_roce_device.h

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28

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

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3

drivers/infiniband/hw/hns/hns_roce_qp.c

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