cas_control_data
sizeof(struct cas_control_data), CAS_PAGE_SIZE, 0, &sc->sc_cdseg,
sizeof(struct cas_control_data), (caddr_t *)&sc->sc_control_data,
sizeof(struct cas_control_data), 1,
sizeof(struct cas_control_data), 0, 0, &sc->sc_cddmamap)) != 0) {
sc->sc_control_data, sizeof(struct cas_control_data), NULL,
sizeof(struct cas_control_data));
#define CAS_CDOFF(x) offsetof(struct cas_control_data, x)
struct cas_control_data *sc_control_data;