alloc_cq_frag_buf
err = alloc_cq_frag_buf(dev, cq->resize_buf, entries, cqe_size);
err = alloc_cq_frag_buf(dev, &cq->buf, entries, cqe_size);
err = alloc_cq_frag_buf(mdev, &cq->buf, ncqe, cqe_size);