chan_rate
nic_rate[0] = chan_rate(adap, G_TNLRATE0(v));
nic_rate[1] = chan_rate(adap, G_TNLRATE1(v));
nic_rate[2] = chan_rate(adap, G_TNLRATE2(v));
nic_rate[3] = chan_rate(adap, G_TNLRATE3(v));
ofld_rate[0] = chan_rate(adap, G_OFDRATE0(v));
ofld_rate[1] = chan_rate(adap, G_OFDRATE1(v));
ofld_rate[2] = chan_rate(adap, G_OFDRATE2(v));
ofld_rate[3] = chan_rate(adap, G_OFDRATE3(v));