CNT_PER_DESC
desc_num = DIV_ROUND_UP(HNS_ROCE_HW_CNT_TOTAL, CNT_PER_DESC);
bd_idx = i / CNT_PER_DESC;
if (bd_idx != HNS_ROCE_HW_CNT_TOTAL / CNT_PER_DESC &&
cnt_idx = i % CNT_PER_DESC;