2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
24 * Authors: Dave Airlie
32 #include <linux/slab.h>
33 #include <linux/acpi.h>
38 #define AMD_VBIOS_SIGNATURE " 761295520"
39 #define AMD_VBIOS_SIGNATURE_OFFSET 0x30
40 #define AMD_VBIOS_SIGNATURE_SIZE sizeof(AMD_VBIOS_SIGNATURE)
41 #define AMD_VBIOS_SIGNATURE_END (AMD_VBIOS_SIGNATURE_OFFSET + AMD_VBIOS_SIGNATURE_SIZE)
42 #define AMD_IS_VALID_VBIOS(p) ((p)[0] == 0x55 && (p)[1] == 0xAA)
43 #define AMD_VBIOS_LENGTH(p) ((p)[2] << 9)
45 /* If you boot an IGP board with a discrete card as the primary,
46 * the IGP rom is not accessible via the rom bar as the IGP rom is
47 * part of the system bios. On boot, the system bios puts a
48 * copy of the igp rom at the start of vram if a discrete card is
51 static bool igp_read_bios_from_vram(struct amdgpu_device
*adev
)
53 uint8_t __iomem
*bios
;
54 resource_size_t vram_base
;
55 resource_size_t size
= 256 * 1024; /* ??? */
57 if (!(adev
->flags
& AMD_IS_APU
))
58 if (!amdgpu_card_posted(adev
))
62 vram_base
= pci_resource_start(adev
->pdev
, 0);
63 bios
= ioremap(vram_base
, size
);
68 if (size
== 0 || !AMD_IS_VALID_VBIOS(bios
)) {
72 adev
->bios
= kmalloc(size
, GFP_KERNEL
);
73 if (adev
->bios
== NULL
) {
77 memcpy_fromio(adev
->bios
, bios
, size
);
82 bool amdgpu_read_bios(struct amdgpu_device
*adev
)
84 uint8_t __iomem
*bios
, val
[2];
88 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
89 bios
= pci_map_rom(adev
->pdev
, &size
);
94 val
[0] = readb(&bios
[0]);
95 val
[1] = readb(&bios
[1]);
97 if (size
== 0 || !AMD_IS_VALID_VBIOS(val
)) {
98 pci_unmap_rom(adev
->pdev
, bios
);
101 adev
->bios
= kzalloc(size
, GFP_KERNEL
);
102 if (adev
->bios
== NULL
) {
103 pci_unmap_rom(adev
->pdev
, bios
);
106 memcpy_fromio(adev
->bios
, bios
, size
);
107 pci_unmap_rom(adev
->pdev
, bios
);
111 static bool amdgpu_read_bios_from_rom(struct amdgpu_device
*adev
)
113 u8 header
[AMD_VBIOS_SIGNATURE_END
+1] = {0};
116 if (!adev
->asic_funcs
->read_bios_from_rom
)
119 /* validate VBIOS signature */
120 if (amdgpu_asic_read_bios_from_rom(adev
, &header
[0], sizeof(header
)) == false)
122 header
[AMD_VBIOS_SIGNATURE_END
] = 0;
124 if ((!AMD_IS_VALID_VBIOS(header
)) ||
125 0 != memcmp((char *)&header
[AMD_VBIOS_SIGNATURE_OFFSET
],
127 strlen(AMD_VBIOS_SIGNATURE
)))
130 /* valid vbios, go on */
131 len
= AMD_VBIOS_LENGTH(header
);
133 adev
->bios
= kmalloc(len
, GFP_KERNEL
);
135 DRM_ERROR("no memory to allocate for BIOS\n");
139 /* read complete BIOS */
140 return amdgpu_asic_read_bios_from_rom(adev
, adev
->bios
, len
);
143 static bool amdgpu_read_platform_bios(struct amdgpu_device
*adev
)
145 uint8_t __iomem
*bios
;
150 bios
= pci_platform_rom(adev
->pdev
, &size
);
155 if (size
== 0 || !AMD_IS_VALID_VBIOS(bios
)) {
158 adev
->bios
= kmemdup(bios
, size
, GFP_KERNEL
);
159 if (adev
->bios
== NULL
) {
167 /* ATRM is used to get the BIOS on the discrete cards in
170 /* retrieve the ROM in 4k blocks */
171 #define ATRM_BIOS_PAGE 4096
173 * amdgpu_atrm_call - fetch a chunk of the vbios
175 * @atrm_handle: acpi ATRM handle
176 * @bios: vbios image pointer
177 * @offset: offset of vbios image data to fetch
178 * @len: length of vbios image data to fetch
180 * Executes ATRM to fetch a chunk of the discrete
181 * vbios image on PX systems (all asics).
182 * Returns the length of the buffer fetched.
184 static int amdgpu_atrm_call(acpi_handle atrm_handle
, uint8_t *bios
,
188 union acpi_object atrm_arg_elements
[2], *obj
;
189 struct acpi_object_list atrm_arg
;
190 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
193 atrm_arg
.pointer
= &atrm_arg_elements
[0];
195 atrm_arg_elements
[0].type
= ACPI_TYPE_INTEGER
;
196 atrm_arg_elements
[0].integer
.value
= offset
;
198 atrm_arg_elements
[1].type
= ACPI_TYPE_INTEGER
;
199 atrm_arg_elements
[1].integer
.value
= len
;
201 status
= acpi_evaluate_object(atrm_handle
, NULL
, &atrm_arg
, &buffer
);
202 if (ACPI_FAILURE(status
)) {
203 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status
));
207 obj
= (union acpi_object
*)buffer
.pointer
;
208 memcpy(bios
+offset
, obj
->buffer
.pointer
, obj
->buffer
.length
);
209 len
= obj
->buffer
.length
;
210 kfree(buffer
.pointer
);
214 static bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
217 int size
= 256 * 1024;
219 struct pci_dev
*pdev
= NULL
;
220 acpi_handle dhandle
, atrm_handle
;
224 /* ATRM is for the discrete card only */
225 if (adev
->flags
& AMD_IS_APU
)
228 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_VGA
<< 8, pdev
)) != NULL
) {
229 dhandle
= ACPI_HANDLE(&pdev
->dev
);
233 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
234 if (!ACPI_FAILURE(status
)) {
241 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_OTHER
<< 8, pdev
)) != NULL
) {
242 dhandle
= ACPI_HANDLE(&pdev
->dev
);
246 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
247 if (!ACPI_FAILURE(status
)) {
257 adev
->bios
= kmalloc(size
, GFP_KERNEL
);
259 DRM_ERROR("Unable to allocate bios\n");
263 for (i
= 0; i
< size
/ ATRM_BIOS_PAGE
; i
++) {
264 ret
= amdgpu_atrm_call(atrm_handle
,
266 (i
* ATRM_BIOS_PAGE
),
268 if (ret
< ATRM_BIOS_PAGE
)
272 if (i
== 0 || !AMD_IS_VALID_VBIOS(adev
->bios
)) {
279 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
285 static bool amdgpu_read_disabled_bios(struct amdgpu_device
*adev
)
287 if (adev
->flags
& AMD_IS_APU
)
288 return igp_read_bios_from_vram(adev
);
290 return amdgpu_asic_read_disabled_bios(adev
);
294 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
297 struct acpi_table_header
*hdr
;
299 UEFI_ACPI_VFCT
*vfct
;
300 GOP_VBIOS_CONTENT
*vbios
;
301 VFCT_IMAGE_HEADER
*vhdr
;
303 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr
)))
305 tbl_size
= hdr
->length
;
306 if (tbl_size
< sizeof(UEFI_ACPI_VFCT
)) {
307 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
311 vfct
= (UEFI_ACPI_VFCT
*)hdr
;
312 if (vfct
->VBIOSImageOffset
+ sizeof(VFCT_IMAGE_HEADER
) > tbl_size
) {
313 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
317 vbios
= (GOP_VBIOS_CONTENT
*)((char *)hdr
+ vfct
->VBIOSImageOffset
);
318 vhdr
= &vbios
->VbiosHeader
;
319 DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",
320 vhdr
->PCIBus
, vhdr
->PCIDevice
, vhdr
->PCIFunction
,
321 vhdr
->VendorID
, vhdr
->DeviceID
, vhdr
->ImageLength
);
323 if (vhdr
->PCIBus
!= adev
->pdev
->bus
->number
||
324 vhdr
->PCIDevice
!= PCI_SLOT(adev
->pdev
->devfn
) ||
325 vhdr
->PCIFunction
!= PCI_FUNC(adev
->pdev
->devfn
) ||
326 vhdr
->VendorID
!= adev
->pdev
->vendor
||
327 vhdr
->DeviceID
!= adev
->pdev
->device
) {
328 DRM_INFO("ACPI VFCT table is not for this card\n");
332 if (vfct
->VBIOSImageOffset
+ sizeof(VFCT_IMAGE_HEADER
) + vhdr
->ImageLength
> tbl_size
) {
333 DRM_ERROR("ACPI VFCT image truncated\n");
337 adev
->bios
= kmemdup(&vbios
->VbiosContent
, vhdr
->ImageLength
, GFP_KERNEL
);
344 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
350 bool amdgpu_get_bios(struct amdgpu_device
*adev
)
353 uint16_t tmp
, bios_header_start
;
355 r
= amdgpu_atrm_get_bios(adev
);
357 r
= amdgpu_acpi_vfct_bios(adev
);
359 r
= igp_read_bios_from_vram(adev
);
361 r
= amdgpu_read_bios(adev
);
363 r
= amdgpu_read_bios_from_rom(adev
);
366 r
= amdgpu_read_disabled_bios(adev
);
369 r
= amdgpu_read_platform_bios(adev
);
371 if (!r
|| adev
->bios
== NULL
) {
372 DRM_ERROR("Unable to locate a BIOS ROM\n");
376 if (!AMD_IS_VALID_VBIOS(adev
->bios
)) {
377 printk("BIOS signature incorrect %x %x\n", adev
->bios
[0], adev
->bios
[1]);
382 if (RBIOS8(tmp
+ 0x14) != 0x0) {
383 DRM_INFO("Not an x86 BIOS ROM, not using.\n");
387 bios_header_start
= RBIOS16(0x48);
388 if (!bios_header_start
) {
391 tmp
= bios_header_start
+ 4;
392 if (!memcmp(adev
->bios
+ tmp
, "ATOM", 4) ||
393 !memcmp(adev
->bios
+ tmp
, "MOTA", 4)) {
394 adev
->is_atom_bios
= true;
396 adev
->is_atom_bios
= false;
399 DRM_DEBUG("%sBIOS detected\n", adev
->is_atom_bios
? "ATOM" : "COM");