RB_CTRL
CSR_WRITE_1(dev, RB_ADDR(port->p_txsq, RB_CTRL), RB_RST_SET);
CSR_WRITE_1(dev, RB_ADDR(rxq, RB_CTRL), RB_RST_CLR);
CSR_WRITE_1(dev, RB_ADDR(rxq, RB_CTRL), RB_ENA_OP_MD);
(void) CSR_READ_1(dev, RB_ADDR(rxq, RB_CTRL));
CSR_WRITE_1(dev, RB_ADDR(txq, RB_CTRL), RB_RST_CLR);
CSR_WRITE_1(dev, RB_ADDR(txq, RB_CTRL), RB_ENA_STFWD);
CSR_WRITE_1(dev, RB_ADDR(txq, RB_CTRL), RB_ENA_OP_MD);
(void) CSR_READ_1(dev, RB_ADDR(txq, RB_CTRL));
CSR_WRITE_1(dev, RB_ADDR(txq, RB_CTRL), RB_RST_SET | RB_DIS_OP_MD);
CSR_WRITE_1(dev, RB_ADDR(txq, RB_CTRL), RB_RST_SET);
CSR_WRITE_1(dev, RB_ADDR(rxq, RB_CTRL), RB_DIS_OP_MD);
CSR_WRITE_1(dev, RB_ADDR(rxq, RB_CTRL), RB_RST_SET);