!2537 Support SRQ record doorbell

Merge Pull Request from: @stinft 
 
Upload a patch to support SRQ record doorbell.
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.

Yangyang Li (1):
   RDMA/hns: Support SRQ record doorbell

https://gitee.com/openeuler/kernel/issues/I8A08Z 
 
Link:https://gitee.com/openeuler/kernel/pulls/2537

 

Reviewed-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>