NCMDS_TX
mp->rx_cmds = mp->tx_cmds + NCMDS_TX * N_TX_RING + 1;
(NCMDS_TX*N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd));
cp = mp->tx_cmds + NCMDS_TX * N_TX_RING;
cp = mp->tx_cmds + NCMDS_TX * fill;
np = mp->tx_cmds + NCMDS_TX * next;
cp = mp->tx_cmds + NCMDS_TX * i;
+ (N_RX_RING + NCMDS_TX * N_TX_RING + 3) * sizeof(struct dbdma_cmd))
cp = mp->tx_cmds + NCMDS_TX * i;
cp = mp->tx_cmds + NCMDS_TX * mp->tx_empty;
cp = mp->tx_cmds + NCMDS_TX * i;