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
);
77 adev
->bios_size
= size
;
78 memcpy_fromio(adev
->bios
, bios
, size
);
83 bool amdgpu_read_bios(struct amdgpu_device
*adev
)
85 uint8_t __iomem
*bios
, val
[2];
89 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
90 bios
= pci_map_rom(adev
->pdev
, &size
);
95 val
[0] = readb(&bios
[0]);
96 val
[1] = readb(&bios
[1]);
98 if (size
== 0 || !AMD_IS_VALID_VBIOS(val
)) {
99 pci_unmap_rom(adev
->pdev
, bios
);
102 adev
->bios
= kzalloc(size
, GFP_KERNEL
);
103 if (adev
->bios
== NULL
) {
104 pci_unmap_rom(adev
->pdev
, bios
);
107 adev
->bios_size
= size
;
108 memcpy_fromio(adev
->bios
, bios
, size
);
109 pci_unmap_rom(adev
->pdev
, bios
);
113 static bool amdgpu_read_bios_from_rom(struct amdgpu_device
*adev
)
115 u8 header
[AMD_VBIOS_SIGNATURE_END
+1] = {0};
118 if (!adev
->asic_funcs
->read_bios_from_rom
)
121 /* validate VBIOS signature */
122 if (amdgpu_asic_read_bios_from_rom(adev
, &header
[0], sizeof(header
)) == false)
124 header
[AMD_VBIOS_SIGNATURE_END
] = 0;
126 if ((!AMD_IS_VALID_VBIOS(header
)) ||
127 0 != memcmp((char *)&header
[AMD_VBIOS_SIGNATURE_OFFSET
],
129 strlen(AMD_VBIOS_SIGNATURE
)))
132 /* valid vbios, go on */
133 len
= AMD_VBIOS_LENGTH(header
);
135 adev
->bios
= kmalloc(len
, GFP_KERNEL
);
137 DRM_ERROR("no memory to allocate for BIOS\n");
140 adev
->bios_size
= len
;
142 /* read complete BIOS */
143 return amdgpu_asic_read_bios_from_rom(adev
, adev
->bios
, len
);
146 static bool amdgpu_read_platform_bios(struct amdgpu_device
*adev
)
148 uint8_t __iomem
*bios
;
153 bios
= pci_platform_rom(adev
->pdev
, &size
);
158 if (size
== 0 || !AMD_IS_VALID_VBIOS(bios
)) {
161 adev
->bios
= kmemdup(bios
, size
, GFP_KERNEL
);
162 if (adev
->bios
== NULL
) {
165 adev
->bios_size
= size
;
171 /* ATRM is used to get the BIOS on the discrete cards in
174 /* retrieve the ROM in 4k blocks */
175 #define ATRM_BIOS_PAGE 4096
177 * amdgpu_atrm_call - fetch a chunk of the vbios
179 * @atrm_handle: acpi ATRM handle
180 * @bios: vbios image pointer
181 * @offset: offset of vbios image data to fetch
182 * @len: length of vbios image data to fetch
184 * Executes ATRM to fetch a chunk of the discrete
185 * vbios image on PX systems (all asics).
186 * Returns the length of the buffer fetched.
188 static int amdgpu_atrm_call(acpi_handle atrm_handle
, uint8_t *bios
,
192 union acpi_object atrm_arg_elements
[2], *obj
;
193 struct acpi_object_list atrm_arg
;
194 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
197 atrm_arg
.pointer
= &atrm_arg_elements
[0];
199 atrm_arg_elements
[0].type
= ACPI_TYPE_INTEGER
;
200 atrm_arg_elements
[0].integer
.value
= offset
;
202 atrm_arg_elements
[1].type
= ACPI_TYPE_INTEGER
;
203 atrm_arg_elements
[1].integer
.value
= len
;
205 status
= acpi_evaluate_object(atrm_handle
, NULL
, &atrm_arg
, &buffer
);
206 if (ACPI_FAILURE(status
)) {
207 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status
));
211 obj
= (union acpi_object
*)buffer
.pointer
;
212 memcpy(bios
+offset
, obj
->buffer
.pointer
, obj
->buffer
.length
);
213 len
= obj
->buffer
.length
;
214 kfree(buffer
.pointer
);
218 static bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
221 int size
= 256 * 1024;
223 struct pci_dev
*pdev
= NULL
;
224 acpi_handle dhandle
, atrm_handle
;
228 /* ATRM is for the discrete card only */
229 if (adev
->flags
& AMD_IS_APU
)
232 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_VGA
<< 8, pdev
)) != NULL
) {
233 dhandle
= ACPI_HANDLE(&pdev
->dev
);
237 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
238 if (!ACPI_FAILURE(status
)) {
245 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_OTHER
<< 8, pdev
)) != NULL
) {
246 dhandle
= ACPI_HANDLE(&pdev
->dev
);
250 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
251 if (!ACPI_FAILURE(status
)) {
261 adev
->bios
= kmalloc(size
, GFP_KERNEL
);
263 DRM_ERROR("Unable to allocate bios\n");
267 for (i
= 0; i
< size
/ ATRM_BIOS_PAGE
; i
++) {
268 ret
= amdgpu_atrm_call(atrm_handle
,
270 (i
* ATRM_BIOS_PAGE
),
272 if (ret
< ATRM_BIOS_PAGE
)
276 if (i
== 0 || !AMD_IS_VALID_VBIOS(adev
->bios
)) {
280 adev
->bios_size
= size
;
284 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
290 static bool amdgpu_read_disabled_bios(struct amdgpu_device
*adev
)
292 if (adev
->flags
& AMD_IS_APU
)
293 return igp_read_bios_from_vram(adev
);
295 return amdgpu_asic_read_disabled_bios(adev
);
299 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
302 struct acpi_table_header
*hdr
;
304 UEFI_ACPI_VFCT
*vfct
;
305 GOP_VBIOS_CONTENT
*vbios
;
306 VFCT_IMAGE_HEADER
*vhdr
;
308 if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr
, &tbl_size
)))
310 if (tbl_size
< sizeof(UEFI_ACPI_VFCT
)) {
311 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
315 vfct
= (UEFI_ACPI_VFCT
*)hdr
;
316 if (vfct
->VBIOSImageOffset
+ sizeof(VFCT_IMAGE_HEADER
) > tbl_size
) {
317 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
321 vbios
= (GOP_VBIOS_CONTENT
*)((char *)hdr
+ vfct
->VBIOSImageOffset
);
322 vhdr
= &vbios
->VbiosHeader
;
323 DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",
324 vhdr
->PCIBus
, vhdr
->PCIDevice
, vhdr
->PCIFunction
,
325 vhdr
->VendorID
, vhdr
->DeviceID
, vhdr
->ImageLength
);
327 if (vhdr
->PCIBus
!= adev
->pdev
->bus
->number
||
328 vhdr
->PCIDevice
!= PCI_SLOT(adev
->pdev
->devfn
) ||
329 vhdr
->PCIFunction
!= PCI_FUNC(adev
->pdev
->devfn
) ||
330 vhdr
->VendorID
!= adev
->pdev
->vendor
||
331 vhdr
->DeviceID
!= adev
->pdev
->device
) {
332 DRM_INFO("ACPI VFCT table is not for this card\n");
336 if (vfct
->VBIOSImageOffset
+ sizeof(VFCT_IMAGE_HEADER
) + vhdr
->ImageLength
> tbl_size
) {
337 DRM_ERROR("ACPI VFCT image truncated\n");
341 adev
->bios
= kmemdup(&vbios
->VbiosContent
, vhdr
->ImageLength
, GFP_KERNEL
);
342 adev
->bios_size
= vhdr
->ImageLength
;
349 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
355 bool amdgpu_get_bios(struct amdgpu_device
*adev
)
358 uint16_t tmp
, bios_header_start
;
360 r
= amdgpu_atrm_get_bios(adev
);
362 r
= amdgpu_acpi_vfct_bios(adev
);
364 r
= igp_read_bios_from_vram(adev
);
366 r
= amdgpu_read_bios(adev
);
368 r
= amdgpu_read_bios_from_rom(adev
);
371 r
= amdgpu_read_disabled_bios(adev
);
374 r
= amdgpu_read_platform_bios(adev
);
376 if (!r
|| adev
->bios
== NULL
) {
377 DRM_ERROR("Unable to locate a BIOS ROM\n");
381 if (!AMD_IS_VALID_VBIOS(adev
->bios
)) {
382 printk("BIOS signature incorrect %x %x\n", adev
->bios
[0], adev
->bios
[1]);
387 if (RBIOS8(tmp
+ 0x14) != 0x0) {
388 DRM_INFO("Not an x86 BIOS ROM, not using.\n");
392 bios_header_start
= RBIOS16(0x48);
393 if (!bios_header_start
) {
396 tmp
= bios_header_start
+ 4;
397 if (!memcmp(adev
->bios
+ tmp
, "ATOM", 4) ||
398 !memcmp(adev
->bios
+ tmp
, "MOTA", 4)) {
399 adev
->is_atom_bios
= true;
401 adev
->is_atom_bios
= false;
404 DRM_DEBUG("%sBIOS detected\n", adev
->is_atom_bios
? "ATOM" : "COM");