int nouveau_bios_score(struct nouveau_device *device, const bool writeable)
{
if (device->bios.size < 3 || !device->bios.data || device->bios.data[0] != 0x55 || device->bios.data[1] != 0xAA) {
nv_debug(device, "VBIOS signature not found\n");
return 0;
}
if (nvbios_checksum((u8*)device->bios.data, min_t(u32, device->bios.data[2] * 512, device->bios.size))) {
nv_debug(device, "VBIOS checksum invalid\n");
/* if a ro image is somewhat bad, it's probably all rubbish */
return writeable ? 2 : 1;
}
nv_debug(device, "VBIOS appears to be valid\n");
return 3;
}
static int
nouveau_bios_score(struct nouveau_bios *bios, const bool writeable)
{
if (bios->size < 3 || !bios->data || bios->data[0] != 0x55 ||
bios->data[1] != 0xAA) {
nv_info(bios, "... signature not found\n");
return 0;
}
if (nvbios_checksum(bios->data,
min_t(u32, bios->data[2] * 512, bios->size))) {
nv_info(bios, "... checksum invalid\n");
/* if a ro image is somewhat bad, it's probably all rubbish */
return writeable ? 2 : 1;
}
nv_info(bios, "... appears to be valid\n");
return 3;
}
static void
nouveau_bios_shadow_acpi(struct nouveau_bios *bios)
{
struct pci_dev *pdev = nv_device(bios)->pdev;
int ret, cnt, i;
if (!nouveau_acpi_rom_supported(pdev)) {
bios->data = NULL;
return;
}
bios->size = 0;
bios->data = kmalloc(4096, GFP_KERNEL);
if (bios->data) {
if (nouveau_acpi_get_bios_chunk(bios->data, 0, 4096) == 4096)
bios->size = bios->data[2] * 512;
kfree(bios->data);
}
if (!bios->size)
return;
bios->data = kmalloc(bios->size, GFP_KERNEL);
if (bios->data) {
/* disobey the acpi spec - much faster on at least w530 ... */
ret = nouveau_acpi_get_bios_chunk(bios->data, 0, bios->size);
if (ret != bios->size ||
nvbios_checksum(bios->data, bios->size)) {
/* ... that didn't work, ok, i'll be good now */
for (i = 0; i < bios->size; i += cnt) {
cnt = min((bios->size - i), (u32)4096);
ret = nouveau_acpi_get_bios_chunk(bios->data, i, cnt);
if (ret != cnt)
break;
}
}
}
}
