RDMA/hns: Use the reserved loopback QPs to free MR before destroying MPT

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Before destroying MPT, the reserved loopback QPs send loopback IOs (one
write operation per SL). Completing these loopback IOs represents that
there isn't any outstanding request in MPT, then it's safe to destroy MPT.

Link: https://lore.kernel.org/r/20220310042835.38634-1-liangwenpeng@huawei.com
Signed-off-by: Yixing Liu <liuyixing1@huawei.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Yixing Liu 2022-03-10 12:28:35 +08:00 • committed by Jason Gunthorpe

parent 51cad28724

commit 70f9252158

4 changed files with 335 additions and 4 deletions

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2

drivers/infiniband/hw/hns/hns_roce_device.h

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311

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

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20

drivers/infiniband/hw/hns/hns_roce_hw_v2.h

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6

drivers/infiniband/hw/hns/hns_roce_mr.c

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