RDMA/hns: Support SRQ record doorbell

Browse source

Compared with normal doorbell, using record doorbell can shorten the
process of ringing the doorbell and reduce the latency.

Add a flag HNS_ROCE_CAP_FLAG_SRQ_RECORD_DB to allow FW to
enable/disable SRQ record doorbell.

If the flag above is set, allocate the dma buffer for SRQ record
doorbell and write the buffer address into SRQC during SRQ creation.

For userspace SRQ, add a flag HNS_ROCE_RSP_SRQ_CAP_RECORD_DB to notify
userspace whether the SRQ record doorbell is enabled.

Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://lore.kernel.org/r/20230926130026.583088-1-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

...

This commit is contained in:

Yangyang Li 2023-09-26 21:00:26 +08:00 • committed by Leon Romanovsky

parent 8dc0fd2f56

commit c9813b0b99

4 changed files with 119 additions and 12 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

drivers/infiniband/hw/hns/hns_roce_device.h

View file

31

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

View file

85

drivers/infiniband/hw/hns/hns_roce_srq.c

View file

12

include/uapi/rdma/hns-abi.h

View file