hns_roce_db_map_user
err = hns_roce_db_map_user(uctx, addr, &hr_cq->db);
int hns_roce_db_map_user(struct hns_roce_ucontext *context, unsigned long virt,
ret = hns_roce_db_map_user(uctx, ucmd->sdb_addr, &hr_qp->sdb);
ret = hns_roce_db_map_user(uctx, ucmd->db_addr, &hr_qp->rdb);
ret = hns_roce_db_map_user(uctx, ucmd.db_addr,