CMP_QUEUE_LEN
qs->cq_len = CMP_QUEUE_LEN;
cq->rx_br = buf_ring_alloc(CMP_QUEUE_LEN * 8, M_DEVBUF, M_WAITOK,
((256 / (CMP_QUEUE_LEN / (CMP_QUEUE_LEN - MAX_CQES_FOR_TX))) + 1)