405 lines
10 KiB
C
405 lines
10 KiB
C
/*
|
|
* Copyright 2008 Advanced Micro Devices, Inc.
|
|
* Copyright 2008 Red Hat Inc.
|
|
* Copyright 2009 Jerome Glisse.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Authors: Dave Airlie
|
|
* Alex Deucher
|
|
* Jerome Glisse
|
|
*/
|
|
#include <drm/drmP.h>
|
|
#include "amdgpu.h"
|
|
#include "atom.h"
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/acpi.h>
|
|
/*
|
|
* BIOS.
|
|
*/
|
|
|
|
#define AMD_VBIOS_SIGNATURE " 761295520"
|
|
#define AMD_VBIOS_SIGNATURE_OFFSET 0x30
|
|
#define AMD_VBIOS_SIGNATURE_SIZE sizeof(AMD_VBIOS_SIGNATURE)
|
|
#define AMD_VBIOS_SIGNATURE_END (AMD_VBIOS_SIGNATURE_OFFSET + AMD_VBIOS_SIGNATURE_SIZE)
|
|
#define AMD_IS_VALID_VBIOS(p) ((p)[0] == 0x55 && (p)[1] == 0xAA)
|
|
#define AMD_VBIOS_LENGTH(p) ((p)[2] << 9)
|
|
|
|
/* If you boot an IGP board with a discrete card as the primary,
|
|
* the IGP rom is not accessible via the rom bar as the IGP rom is
|
|
* part of the system bios. On boot, the system bios puts a
|
|
* copy of the igp rom at the start of vram if a discrete card is
|
|
* present.
|
|
*/
|
|
static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
|
|
{
|
|
uint8_t __iomem *bios;
|
|
resource_size_t vram_base;
|
|
resource_size_t size = 256 * 1024; /* ??? */
|
|
|
|
if (!(adev->flags & AMD_IS_APU))
|
|
if (!amdgpu_card_posted(adev))
|
|
return false;
|
|
|
|
adev->bios = NULL;
|
|
vram_base = pci_resource_start(adev->pdev, 0);
|
|
bios = ioremap(vram_base, size);
|
|
if (!bios) {
|
|
return false;
|
|
}
|
|
|
|
if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
|
|
iounmap(bios);
|
|
return false;
|
|
}
|
|
adev->bios = kmalloc(size, GFP_KERNEL);
|
|
if (adev->bios == NULL) {
|
|
iounmap(bios);
|
|
return false;
|
|
}
|
|
memcpy_fromio(adev->bios, bios, size);
|
|
iounmap(bios);
|
|
return true;
|
|
}
|
|
|
|
bool amdgpu_read_bios(struct amdgpu_device *adev)
|
|
{
|
|
uint8_t __iomem *bios, val[2];
|
|
size_t size;
|
|
|
|
adev->bios = NULL;
|
|
/* XXX: some cards may return 0 for rom size? ddx has a workaround */
|
|
bios = pci_map_rom(adev->pdev, &size);
|
|
if (!bios) {
|
|
return false;
|
|
}
|
|
|
|
val[0] = readb(&bios[0]);
|
|
val[1] = readb(&bios[1]);
|
|
|
|
if (size == 0 || !AMD_IS_VALID_VBIOS(val)) {
|
|
pci_unmap_rom(adev->pdev, bios);
|
|
return false;
|
|
}
|
|
adev->bios = kzalloc(size, GFP_KERNEL);
|
|
if (adev->bios == NULL) {
|
|
pci_unmap_rom(adev->pdev, bios);
|
|
return false;
|
|
}
|
|
memcpy_fromio(adev->bios, bios, size);
|
|
pci_unmap_rom(adev->pdev, bios);
|
|
return true;
|
|
}
|
|
|
|
static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
|
|
{
|
|
u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
|
|
int len;
|
|
|
|
if (!adev->asic_funcs->read_bios_from_rom)
|
|
return false;
|
|
|
|
/* validate VBIOS signature */
|
|
if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
|
|
return false;
|
|
header[AMD_VBIOS_SIGNATURE_END] = 0;
|
|
|
|
if ((!AMD_IS_VALID_VBIOS(header)) ||
|
|
0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
|
|
AMD_VBIOS_SIGNATURE,
|
|
strlen(AMD_VBIOS_SIGNATURE)))
|
|
return false;
|
|
|
|
/* valid vbios, go on */
|
|
len = AMD_VBIOS_LENGTH(header);
|
|
len = ALIGN(len, 4);
|
|
adev->bios = kmalloc(len, GFP_KERNEL);
|
|
if (!adev->bios) {
|
|
DRM_ERROR("no memory to allocate for BIOS\n");
|
|
return false;
|
|
}
|
|
|
|
/* read complete BIOS */
|
|
return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
|
|
}
|
|
|
|
static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
|
|
{
|
|
uint8_t __iomem *bios;
|
|
size_t size;
|
|
|
|
adev->bios = NULL;
|
|
|
|
bios = pci_platform_rom(adev->pdev, &size);
|
|
if (!bios) {
|
|
return false;
|
|
}
|
|
|
|
if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
|
|
return false;
|
|
}
|
|
adev->bios = kmemdup(bios, size, GFP_KERNEL);
|
|
if (adev->bios == NULL) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI
|
|
/* ATRM is used to get the BIOS on the discrete cards in
|
|
* dual-gpu systems.
|
|
*/
|
|
/* retrieve the ROM in 4k blocks */
|
|
#define ATRM_BIOS_PAGE 4096
|
|
/**
|
|
* amdgpu_atrm_call - fetch a chunk of the vbios
|
|
*
|
|
* @atrm_handle: acpi ATRM handle
|
|
* @bios: vbios image pointer
|
|
* @offset: offset of vbios image data to fetch
|
|
* @len: length of vbios image data to fetch
|
|
*
|
|
* Executes ATRM to fetch a chunk of the discrete
|
|
* vbios image on PX systems (all asics).
|
|
* Returns the length of the buffer fetched.
|
|
*/
|
|
static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
|
|
int offset, int len)
|
|
{
|
|
acpi_status status;
|
|
union acpi_object atrm_arg_elements[2], *obj;
|
|
struct acpi_object_list atrm_arg;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
|
|
|
|
atrm_arg.count = 2;
|
|
atrm_arg.pointer = &atrm_arg_elements[0];
|
|
|
|
atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
|
|
atrm_arg_elements[0].integer.value = offset;
|
|
|
|
atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
|
|
atrm_arg_elements[1].integer.value = len;
|
|
|
|
status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
|
|
return -ENODEV;
|
|
}
|
|
|
|
obj = (union acpi_object *)buffer.pointer;
|
|
memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
|
|
len = obj->buffer.length;
|
|
kfree(buffer.pointer);
|
|
return len;
|
|
}
|
|
|
|
static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
|
|
{
|
|
int ret;
|
|
int size = 256 * 1024;
|
|
int i;
|
|
struct pci_dev *pdev = NULL;
|
|
acpi_handle dhandle, atrm_handle;
|
|
acpi_status status;
|
|
bool found = false;
|
|
|
|
/* ATRM is for the discrete card only */
|
|
if (adev->flags & AMD_IS_APU)
|
|
return false;
|
|
|
|
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
|
|
dhandle = ACPI_HANDLE(&pdev->dev);
|
|
if (!dhandle)
|
|
continue;
|
|
|
|
status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
|
|
if (!ACPI_FAILURE(status)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
|
|
dhandle = ACPI_HANDLE(&pdev->dev);
|
|
if (!dhandle)
|
|
continue;
|
|
|
|
status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
|
|
if (!ACPI_FAILURE(status)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
return false;
|
|
|
|
adev->bios = kmalloc(size, GFP_KERNEL);
|
|
if (!adev->bios) {
|
|
DRM_ERROR("Unable to allocate bios\n");
|
|
return false;
|
|
}
|
|
|
|
for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
|
|
ret = amdgpu_atrm_call(atrm_handle,
|
|
adev->bios,
|
|
(i * ATRM_BIOS_PAGE),
|
|
ATRM_BIOS_PAGE);
|
|
if (ret < ATRM_BIOS_PAGE)
|
|
break;
|
|
}
|
|
|
|
if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) {
|
|
kfree(adev->bios);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
#else
|
|
static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
|
|
{
|
|
if (adev->flags & AMD_IS_APU)
|
|
return igp_read_bios_from_vram(adev);
|
|
else
|
|
return amdgpu_asic_read_disabled_bios(adev);
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
|
|
{
|
|
bool ret = false;
|
|
struct acpi_table_header *hdr;
|
|
acpi_size tbl_size;
|
|
UEFI_ACPI_VFCT *vfct;
|
|
GOP_VBIOS_CONTENT *vbios;
|
|
VFCT_IMAGE_HEADER *vhdr;
|
|
|
|
if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr, &tbl_size)))
|
|
return false;
|
|
if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
|
|
DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
|
|
goto out_unmap;
|
|
}
|
|
|
|
vfct = (UEFI_ACPI_VFCT *)hdr;
|
|
if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) {
|
|
DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
|
|
goto out_unmap;
|
|
}
|
|
|
|
vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset);
|
|
vhdr = &vbios->VbiosHeader;
|
|
DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",
|
|
vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction,
|
|
vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength);
|
|
|
|
if (vhdr->PCIBus != adev->pdev->bus->number ||
|
|
vhdr->PCIDevice != PCI_SLOT(adev->pdev->devfn) ||
|
|
vhdr->PCIFunction != PCI_FUNC(adev->pdev->devfn) ||
|
|
vhdr->VendorID != adev->pdev->vendor ||
|
|
vhdr->DeviceID != adev->pdev->device) {
|
|
DRM_INFO("ACPI VFCT table is not for this card\n");
|
|
goto out_unmap;
|
|
}
|
|
|
|
if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {
|
|
DRM_ERROR("ACPI VFCT image truncated\n");
|
|
goto out_unmap;
|
|
}
|
|
|
|
adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);
|
|
ret = !!adev->bios;
|
|
|
|
out_unmap:
|
|
return ret;
|
|
}
|
|
#else
|
|
static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
bool amdgpu_get_bios(struct amdgpu_device *adev)
|
|
{
|
|
bool r;
|
|
uint16_t tmp, bios_header_start;
|
|
|
|
r = amdgpu_atrm_get_bios(adev);
|
|
if (!r)
|
|
r = amdgpu_acpi_vfct_bios(adev);
|
|
if (!r)
|
|
r = igp_read_bios_from_vram(adev);
|
|
if (!r)
|
|
r = amdgpu_read_bios(adev);
|
|
if (!r) {
|
|
r = amdgpu_read_bios_from_rom(adev);
|
|
}
|
|
if (!r) {
|
|
r = amdgpu_read_disabled_bios(adev);
|
|
}
|
|
if (!r) {
|
|
r = amdgpu_read_platform_bios(adev);
|
|
}
|
|
if (!r || adev->bios == NULL) {
|
|
DRM_ERROR("Unable to locate a BIOS ROM\n");
|
|
adev->bios = NULL;
|
|
return false;
|
|
}
|
|
if (!AMD_IS_VALID_VBIOS(adev->bios)) {
|
|
printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]);
|
|
goto free_bios;
|
|
}
|
|
|
|
tmp = RBIOS16(0x18);
|
|
if (RBIOS8(tmp + 0x14) != 0x0) {
|
|
DRM_INFO("Not an x86 BIOS ROM, not using.\n");
|
|
goto free_bios;
|
|
}
|
|
|
|
bios_header_start = RBIOS16(0x48);
|
|
if (!bios_header_start) {
|
|
goto free_bios;
|
|
}
|
|
tmp = bios_header_start + 4;
|
|
if (!memcmp(adev->bios + tmp, "ATOM", 4) ||
|
|
!memcmp(adev->bios + tmp, "MOTA", 4)) {
|
|
adev->is_atom_bios = true;
|
|
} else {
|
|
adev->is_atom_bios = false;
|
|
}
|
|
|
|
DRM_DEBUG("%sBIOS detected\n", adev->is_atom_bios ? "ATOM" : "COM");
|
|
return true;
|
|
free_bios:
|
|
kfree(adev->bios);
|
|
adev->bios = NULL;
|
|
return false;
|
|
}
|