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 /* Check if current bios is an ATOM BIOS.
46 * Return true if it is ATOM BIOS. Otherwise, return false.
48 static bool check_atom_bios(uint8_t *bios
, size_t size
)
50 uint16_t tmp
, bios_header_start
;
52 if (!bios
|| size
< 0x49) {
53 DRM_INFO("vbios mem is null or mem size is wrong\n");
57 if (!AMD_IS_VALID_VBIOS(bios
)) {
58 DRM_INFO("BIOS signature incorrect %x %x\n", bios
[0], bios
[1]);
62 tmp
= bios
[0x18] | (bios
[0x19] << 8);
63 if (bios
[tmp
+ 0x14] != 0x0) {
64 DRM_INFO("Not an x86 BIOS ROM\n");
68 bios_header_start
= bios
[0x48] | (bios
[0x49] << 8);
69 if (!bios_header_start
) {
70 DRM_INFO("Can't locate bios header\n");
74 tmp
= bios_header_start
+ 4;
76 DRM_INFO("BIOS header is broken\n");
80 if (!memcmp(bios
+ tmp
, "ATOM", 4) ||
81 !memcmp(bios
+ tmp
, "MOTA", 4)) {
82 DRM_DEBUG("ATOMBIOS detected\n");
89 static bool is_atom_fw(uint8_t *bios
)
91 uint16_t bios_header_start
= bios
[0x48] | (bios
[0x49] << 8);
92 uint8_t frev
= bios
[bios_header_start
+ 2];
93 uint8_t crev
= bios
[bios_header_start
+ 3];
96 ((frev
== 3) && (crev
< 3)))
102 /* If you boot an IGP board with a discrete card as the primary,
103 * the IGP rom is not accessible via the rom bar as the IGP rom is
104 * part of the system bios. On boot, the system bios puts a
105 * copy of the igp rom at the start of vram if a discrete card is
108 static bool igp_read_bios_from_vram(struct amdgpu_device
*adev
)
110 uint8_t __iomem
*bios
;
111 resource_size_t vram_base
;
112 resource_size_t size
= 256 * 1024; /* ??? */
114 if (!(adev
->flags
& AMD_IS_APU
))
115 if (amdgpu_need_post(adev
))
119 vram_base
= pci_resource_start(adev
->pdev
, 0);
120 bios
= ioremap(vram_base
, size
);
125 adev
->bios
= kmalloc(size
, GFP_KERNEL
);
130 adev
->bios_size
= size
;
131 memcpy_fromio(adev
->bios
, bios
, size
);
134 if (!check_atom_bios(adev
->bios
, size
)) {
142 bool amdgpu_read_bios(struct amdgpu_device
*adev
)
144 uint8_t __iomem
*bios
;
148 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
149 bios
= pci_map_rom(adev
->pdev
, &size
);
154 adev
->bios
= kzalloc(size
, GFP_KERNEL
);
155 if (adev
->bios
== NULL
) {
156 pci_unmap_rom(adev
->pdev
, bios
);
159 adev
->bios_size
= size
;
160 memcpy_fromio(adev
->bios
, bios
, size
);
161 pci_unmap_rom(adev
->pdev
, bios
);
163 if (!check_atom_bios(adev
->bios
, size
)) {
171 static bool amdgpu_read_bios_from_rom(struct amdgpu_device
*adev
)
173 u8 header
[AMD_VBIOS_SIGNATURE_END
+1] = {0};
176 if (!adev
->asic_funcs
->read_bios_from_rom
)
179 /* validate VBIOS signature */
180 if (amdgpu_asic_read_bios_from_rom(adev
, &header
[0], sizeof(header
)) == false)
182 header
[AMD_VBIOS_SIGNATURE_END
] = 0;
184 if ((!AMD_IS_VALID_VBIOS(header
)) ||
185 0 != memcmp((char *)&header
[AMD_VBIOS_SIGNATURE_OFFSET
],
187 strlen(AMD_VBIOS_SIGNATURE
)))
190 /* valid vbios, go on */
191 len
= AMD_VBIOS_LENGTH(header
);
193 adev
->bios
= kmalloc(len
, GFP_KERNEL
);
195 DRM_ERROR("no memory to allocate for BIOS\n");
198 adev
->bios_size
= len
;
200 /* read complete BIOS */
201 amdgpu_asic_read_bios_from_rom(adev
, adev
->bios
, len
);
203 if (!check_atom_bios(adev
->bios
, len
)) {
211 static bool amdgpu_read_platform_bios(struct amdgpu_device
*adev
)
213 uint8_t __iomem
*bios
;
218 bios
= pci_platform_rom(adev
->pdev
, &size
);
223 adev
->bios
= kzalloc(size
, GFP_KERNEL
);
224 if (adev
->bios
== NULL
)
227 memcpy_fromio(adev
->bios
, bios
, size
);
229 if (!check_atom_bios(adev
->bios
, size
)) {
234 adev
->bios_size
= size
;
240 /* ATRM is used to get the BIOS on the discrete cards in
243 /* retrieve the ROM in 4k blocks */
244 #define ATRM_BIOS_PAGE 4096
246 * amdgpu_atrm_call - fetch a chunk of the vbios
248 * @atrm_handle: acpi ATRM handle
249 * @bios: vbios image pointer
250 * @offset: offset of vbios image data to fetch
251 * @len: length of vbios image data to fetch
253 * Executes ATRM to fetch a chunk of the discrete
254 * vbios image on PX systems (all asics).
255 * Returns the length of the buffer fetched.
257 static int amdgpu_atrm_call(acpi_handle atrm_handle
, uint8_t *bios
,
261 union acpi_object atrm_arg_elements
[2], *obj
;
262 struct acpi_object_list atrm_arg
;
263 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
266 atrm_arg
.pointer
= &atrm_arg_elements
[0];
268 atrm_arg_elements
[0].type
= ACPI_TYPE_INTEGER
;
269 atrm_arg_elements
[0].integer
.value
= offset
;
271 atrm_arg_elements
[1].type
= ACPI_TYPE_INTEGER
;
272 atrm_arg_elements
[1].integer
.value
= len
;
274 status
= acpi_evaluate_object(atrm_handle
, NULL
, &atrm_arg
, &buffer
);
275 if (ACPI_FAILURE(status
)) {
276 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status
));
280 obj
= (union acpi_object
*)buffer
.pointer
;
281 memcpy(bios
+offset
, obj
->buffer
.pointer
, obj
->buffer
.length
);
282 len
= obj
->buffer
.length
;
283 kfree(buffer
.pointer
);
287 static bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
290 int size
= 256 * 1024;
292 struct pci_dev
*pdev
= NULL
;
293 acpi_handle dhandle
, atrm_handle
;
297 /* ATRM is for the discrete card only */
298 if (adev
->flags
& AMD_IS_APU
)
301 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_VGA
<< 8, pdev
)) != NULL
) {
302 dhandle
= ACPI_HANDLE(&pdev
->dev
);
306 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
307 if (!ACPI_FAILURE(status
)) {
314 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_OTHER
<< 8, pdev
)) != NULL
) {
315 dhandle
= ACPI_HANDLE(&pdev
->dev
);
319 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
320 if (!ACPI_FAILURE(status
)) {
330 adev
->bios
= kmalloc(size
, GFP_KERNEL
);
332 DRM_ERROR("Unable to allocate bios\n");
336 for (i
= 0; i
< size
/ ATRM_BIOS_PAGE
; i
++) {
337 ret
= amdgpu_atrm_call(atrm_handle
,
339 (i
* ATRM_BIOS_PAGE
),
341 if (ret
< ATRM_BIOS_PAGE
)
345 if (!check_atom_bios(adev
->bios
, size
)) {
349 adev
->bios_size
= size
;
353 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
359 static bool amdgpu_read_disabled_bios(struct amdgpu_device
*adev
)
361 if (adev
->flags
& AMD_IS_APU
)
362 return igp_read_bios_from_vram(adev
);
364 return amdgpu_asic_read_disabled_bios(adev
);
368 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
370 struct acpi_table_header
*hdr
;
372 UEFI_ACPI_VFCT
*vfct
;
375 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr
)))
377 tbl_size
= hdr
->length
;
378 if (tbl_size
< sizeof(UEFI_ACPI_VFCT
)) {
379 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
383 vfct
= (UEFI_ACPI_VFCT
*)hdr
;
384 offset
= vfct
->VBIOSImageOffset
;
386 while (offset
< tbl_size
) {
387 GOP_VBIOS_CONTENT
*vbios
= (GOP_VBIOS_CONTENT
*)((char *)hdr
+ offset
);
388 VFCT_IMAGE_HEADER
*vhdr
= &vbios
->VbiosHeader
;
390 offset
+= sizeof(VFCT_IMAGE_HEADER
);
391 if (offset
> tbl_size
) {
392 DRM_ERROR("ACPI VFCT image header truncated\n");
396 offset
+= vhdr
->ImageLength
;
397 if (offset
> tbl_size
) {
398 DRM_ERROR("ACPI VFCT image truncated\n");
402 if (vhdr
->ImageLength
&&
403 vhdr
->PCIBus
== adev
->pdev
->bus
->number
&&
404 vhdr
->PCIDevice
== PCI_SLOT(adev
->pdev
->devfn
) &&
405 vhdr
->PCIFunction
== PCI_FUNC(adev
->pdev
->devfn
) &&
406 vhdr
->VendorID
== adev
->pdev
->vendor
&&
407 vhdr
->DeviceID
== adev
->pdev
->device
) {
408 adev
->bios
= kmemdup(&vbios
->VbiosContent
,
412 if (!check_atom_bios(adev
->bios
, vhdr
->ImageLength
)) {
416 adev
->bios_size
= vhdr
->ImageLength
;
421 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
425 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
431 bool amdgpu_get_bios(struct amdgpu_device
*adev
)
433 if (amdgpu_atrm_get_bios(adev
))
436 if (amdgpu_acpi_vfct_bios(adev
))
439 if (igp_read_bios_from_vram(adev
))
442 if (amdgpu_read_bios(adev
))
445 if (amdgpu_read_bios_from_rom(adev
))
448 if (amdgpu_read_disabled_bios(adev
))
451 if (amdgpu_read_platform_bios(adev
))
454 DRM_ERROR("Unable to locate a BIOS ROM\n");
458 adev
->is_atom_fw
= is_atom_fw(adev
->bios
);