ofisa_dma_get
if (ofisa_dma_get(aa->oba.oba_phandle, &dma, 1) != 1) {
ndrq = ofisa_dma_get(aa->oba.oba_phandle, dma, 2);
n = ofisa_dma_get(aa->oba.oba_phandle, &dma, 1);
int ofisa_dma_get(int, struct ofisa_dma_desc *, int);
ndrq = ofisa_dma_get(aa->oba.oba_phandle, dma, 2);