pciide_dma_table_setup
if (pciide_dma_table_setup(sc, 0, drive) != 0) {
if (pciide_dma_table_setup(sc, channel, drive) != 0) {
if (pciide_dma_table_setup(sc, cp->ata_channel.ch_channel,
int pciide_dma_table_setup(struct pciide_softc*, int, int);