ETID_FLUSH_LEN16
flowc = start_wrq_wr(&cst->eo_txq->wrq, ETID_FLUSH_LEN16, &cookie);
bzero(flowc, ETID_FLUSH_LEN16 * 16);
flowc->flowid_len16 = htobe32(V_FW_WR_LEN16(ETID_FLUSH_LEN16) |
MPASS(cst->tx_credits >= ETID_FLUSH_LEN16);
cst->tx_credits -= ETID_FLUSH_LEN16;
MPASS(credits == ETID_FLUSH_LEN16);