sc->as_nextid = 1;
sc->as_devnode = make_dev(&agp_cdevsw,
0, UID_ROOT, GID_WHEEL, 0600, "agpgart");
0, UID_ROOT, GID_WHEEL, 0600, "agpgart%d", device_get_unit(dev));
sc->as_devnode->si_drv1 = dev;
return 0;