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1/*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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.
23 *
24 * Authors: Dave Airlie
25 * Alex Deucher
26 * Jerome Glisse
27 */
28#include <drm/drmP.h>
29#include "amdgpu.h"
30#include "atom.h"
31
32#include <linux/slab.h>
33#include <linux/acpi.h>
34/*
35 * BIOS.
36 */
37
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)
44
45/* Check if current bios is an ATOM BIOS.
46 * Return true if it is ATOM BIOS. Otherwise, return false.
47 */
48static bool check_atom_bios(uint8_t *bios, size_t size)
49{
50 uint16_t tmp, bios_header_start;
51
52 if (!bios || size < 0x49) {
53 DRM_INFO("vbios mem is null or mem size is wrong\n");
54 return false;
55 }
56
57 if (!AMD_IS_VALID_VBIOS(bios)) {
58 DRM_INFO("BIOS signature incorrect %x %x\n", bios[0], bios[1]);
59 return false;
60 }
61
62 bios_header_start = bios[0x48] | (bios[0x49] << 8);
63 if (!bios_header_start) {
64 DRM_INFO("Can't locate bios header\n");
65 return false;
66 }
67
68 tmp = bios_header_start + 4;
69 if (size < tmp) {
70 DRM_INFO("BIOS header is broken\n");
71 return false;
72 }
73
74 if (!memcmp(bios + tmp, "ATOM", 4) ||
75 !memcmp(bios + tmp, "MOTA", 4)) {
76 DRM_DEBUG("ATOMBIOS detected\n");
77 return true;
78 }
79
80 return false;
81}
82
83/* If you boot an IGP board with a discrete card as the primary,
84 * the IGP rom is not accessible via the rom bar as the IGP rom is
85 * part of the system bios. On boot, the system bios puts a
86 * copy of the igp rom at the start of vram if a discrete card is
87 * present.
88 */
89static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
90{
91 uint8_t __iomem *bios;
92 resource_size_t vram_base;
93 resource_size_t size = 256 * 1024; /* ??? */
94
95 if (!(adev->flags & AMD_IS_APU))
96 if (amdgpu_device_need_post(adev))
97 return false;
98
99 adev->bios = NULL;
100 vram_base = pci_resource_start(adev->pdev, 0);
101 bios = ioremap_wc(vram_base, size);
102 if (!bios) {
103 return false;
104 }
105
106 adev->bios = kmalloc(size, GFP_KERNEL);
107 if (!adev->bios) {
108 iounmap(bios);
109 return false;
110 }
111 adev->bios_size = size;
112 memcpy_fromio(adev->bios, bios, size);
113 iounmap(bios);
114
115 if (!check_atom_bios(adev->bios, size)) {
116 kfree(adev->bios);
117 return false;
118 }
119
120 return true;
121}
122
123bool amdgpu_read_bios(struct amdgpu_device *adev)
124{
125 uint8_t __iomem *bios;
126 size_t size;
127
128 adev->bios = NULL;
129 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
130 bios = pci_map_rom(adev->pdev, &size);
131 if (!bios) {
132 return false;
133 }
134
135 adev->bios = kzalloc(size, GFP_KERNEL);
136 if (adev->bios == NULL) {
137 pci_unmap_rom(adev->pdev, bios);
138 return false;
139 }
140 adev->bios_size = size;
141 memcpy_fromio(adev->bios, bios, size);
142 pci_unmap_rom(adev->pdev, bios);
143
144 if (!check_atom_bios(adev->bios, size)) {
145 kfree(adev->bios);
146 return false;
147 }
148
149 return true;
150}
151
152static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
153{
154 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
155 int len;
156
157 if (!adev->asic_funcs->read_bios_from_rom)
158 return false;
159
160 /* validate VBIOS signature */
161 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
162 return false;
163 header[AMD_VBIOS_SIGNATURE_END] = 0;
164
165 if ((!AMD_IS_VALID_VBIOS(header)) ||
166 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
167 AMD_VBIOS_SIGNATURE,
168 strlen(AMD_VBIOS_SIGNATURE)))
169 return false;
170
171 /* valid vbios, go on */
172 len = AMD_VBIOS_LENGTH(header);
173 len = ALIGN(len, 4);
174 adev->bios = kmalloc(len, GFP_KERNEL);
175 if (!adev->bios) {
176 DRM_ERROR("no memory to allocate for BIOS\n");
177 return false;
178 }
179 adev->bios_size = len;
180
181 /* read complete BIOS */
182 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
183
184 if (!check_atom_bios(adev->bios, len)) {
185 kfree(adev->bios);
186 return false;
187 }
188
189 return true;
190}
191
192static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
193{
194 uint8_t __iomem *bios;
195 size_t size;
196
197 adev->bios = NULL;
198
199 bios = pci_platform_rom(adev->pdev, &size);
200 if (!bios) {
201 return false;
202 }
203
204 adev->bios = kzalloc(size, GFP_KERNEL);
205 if (adev->bios == NULL)
206 return false;
207
208 memcpy_fromio(adev->bios, bios, size);
209
210 if (!check_atom_bios(adev->bios, size)) {
211 kfree(adev->bios);
212 return false;
213 }
214
215 adev->bios_size = size;
216
217 return true;
218}
219
220#ifdef CONFIG_ACPI
221/* ATRM is used to get the BIOS on the discrete cards in
222 * dual-gpu systems.
223 */
224/* retrieve the ROM in 4k blocks */
225#define ATRM_BIOS_PAGE 4096
226/**
227 * amdgpu_atrm_call - fetch a chunk of the vbios
228 *
229 * @atrm_handle: acpi ATRM handle
230 * @bios: vbios image pointer
231 * @offset: offset of vbios image data to fetch
232 * @len: length of vbios image data to fetch
233 *
234 * Executes ATRM to fetch a chunk of the discrete
235 * vbios image on PX systems (all asics).
236 * Returns the length of the buffer fetched.
237 */
238static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
239 int offset, int len)
240{
241 acpi_status status;
242 union acpi_object atrm_arg_elements[2], *obj;
243 struct acpi_object_list atrm_arg;
244 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
245
246 atrm_arg.count = 2;
247 atrm_arg.pointer = &atrm_arg_elements[0];
248
249 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
250 atrm_arg_elements[0].integer.value = offset;
251
252 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
253 atrm_arg_elements[1].integer.value = len;
254
255 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
256 if (ACPI_FAILURE(status)) {
257 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
258 return -ENODEV;
259 }
260
261 obj = (union acpi_object *)buffer.pointer;
262 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
263 len = obj->buffer.length;
264 kfree(buffer.pointer);
265 return len;
266}
267
268static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
269{
270 int ret;
271 int size = 256 * 1024;
272 int i;
273 struct pci_dev *pdev = NULL;
274 acpi_handle dhandle, atrm_handle;
275 acpi_status status;
276 bool found = false;
277
278 /* ATRM is for the discrete card only */
279 if (adev->flags & AMD_IS_APU)
280 return false;
281
282 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
283 dhandle = ACPI_HANDLE(&pdev->dev);
284 if (!dhandle)
285 continue;
286
287 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
288 if (!ACPI_FAILURE(status)) {
289 found = true;
290 break;
291 }
292 }
293
294 if (!found) {
295 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
296 dhandle = ACPI_HANDLE(&pdev->dev);
297 if (!dhandle)
298 continue;
299
300 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
301 if (!ACPI_FAILURE(status)) {
302 found = true;
303 break;
304 }
305 }
306 }
307
308 if (!found)
309 return false;
310
311 adev->bios = kmalloc(size, GFP_KERNEL);
312 if (!adev->bios) {
313 DRM_ERROR("Unable to allocate bios\n");
314 return false;
315 }
316
317 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
318 ret = amdgpu_atrm_call(atrm_handle,
319 adev->bios,
320 (i * ATRM_BIOS_PAGE),
321 ATRM_BIOS_PAGE);
322 if (ret < ATRM_BIOS_PAGE)
323 break;
324 }
325
326 if (!check_atom_bios(adev->bios, size)) {
327 kfree(adev->bios);
328 return false;
329 }
330 adev->bios_size = size;
331 return true;
332}
333#else
334static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
335{
336 return false;
337}
338#endif
339
340static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
341{
342 if (adev->flags & AMD_IS_APU)
343 return igp_read_bios_from_vram(adev);
344 else
345 return amdgpu_asic_read_disabled_bios(adev);
346}
347
348#ifdef CONFIG_ACPI
349static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
350{
351 struct acpi_table_header *hdr;
352 acpi_size tbl_size;
353 UEFI_ACPI_VFCT *vfct;
354 unsigned offset;
355
356 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
357 return false;
358 tbl_size = hdr->length;
359 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
360 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
361 return false;
362 }
363
364 vfct = (UEFI_ACPI_VFCT *)hdr;
365 offset = vfct->VBIOSImageOffset;
366
367 while (offset < tbl_size) {
368 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
369 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
370
371 offset += sizeof(VFCT_IMAGE_HEADER);
372 if (offset > tbl_size) {
373 DRM_ERROR("ACPI VFCT image header truncated\n");
374 return false;
375 }
376
377 offset += vhdr->ImageLength;
378 if (offset > tbl_size) {
379 DRM_ERROR("ACPI VFCT image truncated\n");
380 return false;
381 }
382
383 if (vhdr->ImageLength &&
384 vhdr->PCIBus == adev->pdev->bus->number &&
385 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
386 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
387 vhdr->VendorID == adev->pdev->vendor &&
388 vhdr->DeviceID == adev->pdev->device) {
389 adev->bios = kmemdup(&vbios->VbiosContent,
390 vhdr->ImageLength,
391 GFP_KERNEL);
392
393 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
394 kfree(adev->bios);
395 return false;
396 }
397 adev->bios_size = vhdr->ImageLength;
398 return true;
399 }
400 }
401
402 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
403 return false;
404}
405#else
406static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
407{
408 return false;
409}
410#endif
411
412bool amdgpu_get_bios(struct amdgpu_device *adev)
413{
414 if (amdgpu_atrm_get_bios(adev))
415 goto success;
416
417 if (amdgpu_acpi_vfct_bios(adev))
418 goto success;
419
420 if (igp_read_bios_from_vram(adev))
421 goto success;
422
423 if (amdgpu_read_bios(adev))
424 goto success;
425
426 if (amdgpu_read_bios_from_rom(adev))
427 goto success;
428
429 if (amdgpu_read_disabled_bios(adev))
430 goto success;
431
432 if (amdgpu_read_platform_bios(adev))
433 goto success;
434
435 DRM_ERROR("Unable to locate a BIOS ROM\n");
436 return false;
437
438success:
439 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;
440 return true;
441}
1/*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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.
23 *
24 * Authors: Dave Airlie
25 * Alex Deucher
26 * Jerome Glisse
27 */
28
29#include "amdgpu.h"
30#include "atom.h"
31
32#include <linux/pci.h>
33#include <linux/slab.h>
34#include <linux/acpi.h>
35/*
36 * BIOS.
37 */
38
39#define AMD_VBIOS_SIGNATURE " 761295520"
40#define AMD_VBIOS_SIGNATURE_OFFSET 0x30
41#define AMD_VBIOS_SIGNATURE_SIZE sizeof(AMD_VBIOS_SIGNATURE)
42#define AMD_VBIOS_SIGNATURE_END (AMD_VBIOS_SIGNATURE_OFFSET + AMD_VBIOS_SIGNATURE_SIZE)
43#define AMD_IS_VALID_VBIOS(p) ((p)[0] == 0x55 && (p)[1] == 0xAA)
44#define AMD_VBIOS_LENGTH(p) ((p)[2] << 9)
45
46/* Check if current bios is an ATOM BIOS.
47 * Return true if it is ATOM BIOS. Otherwise, return false.
48 */
49static bool check_atom_bios(uint8_t *bios, size_t size)
50{
51 uint16_t tmp, bios_header_start;
52
53 if (!bios || size < 0x49) {
54 DRM_INFO("vbios mem is null or mem size is wrong\n");
55 return false;
56 }
57
58 if (!AMD_IS_VALID_VBIOS(bios)) {
59 DRM_INFO("BIOS signature incorrect %x %x\n", bios[0], bios[1]);
60 return false;
61 }
62
63 bios_header_start = bios[0x48] | (bios[0x49] << 8);
64 if (!bios_header_start) {
65 DRM_INFO("Can't locate bios header\n");
66 return false;
67 }
68
69 tmp = bios_header_start + 4;
70 if (size < tmp) {
71 DRM_INFO("BIOS header is broken\n");
72 return false;
73 }
74
75 if (!memcmp(bios + tmp, "ATOM", 4) ||
76 !memcmp(bios + tmp, "MOTA", 4)) {
77 DRM_DEBUG("ATOMBIOS detected\n");
78 return true;
79 }
80
81 return false;
82}
83
84/* If you boot an IGP board with a discrete card as the primary,
85 * the IGP rom is not accessible via the rom bar as the IGP rom is
86 * part of the system bios. On boot, the system bios puts a
87 * copy of the igp rom at the start of vram if a discrete card is
88 * present.
89 */
90static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
91{
92 uint8_t __iomem *bios;
93 resource_size_t vram_base;
94 resource_size_t size = 256 * 1024; /* ??? */
95
96 if (!(adev->flags & AMD_IS_APU))
97 if (amdgpu_device_need_post(adev))
98 return false;
99
100 adev->bios = NULL;
101 vram_base = pci_resource_start(adev->pdev, 0);
102 bios = ioremap_wc(vram_base, size);
103 if (!bios) {
104 return false;
105 }
106
107 adev->bios = kmalloc(size, GFP_KERNEL);
108 if (!adev->bios) {
109 iounmap(bios);
110 return false;
111 }
112 adev->bios_size = size;
113 memcpy_fromio(adev->bios, bios, size);
114 iounmap(bios);
115
116 if (!check_atom_bios(adev->bios, size)) {
117 kfree(adev->bios);
118 return false;
119 }
120
121 return true;
122}
123
124bool amdgpu_read_bios(struct amdgpu_device *adev)
125{
126 uint8_t __iomem *bios;
127 size_t size;
128
129 adev->bios = NULL;
130 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
131 bios = pci_map_rom(adev->pdev, &size);
132 if (!bios) {
133 return false;
134 }
135
136 adev->bios = kzalloc(size, GFP_KERNEL);
137 if (adev->bios == NULL) {
138 pci_unmap_rom(adev->pdev, bios);
139 return false;
140 }
141 adev->bios_size = size;
142 memcpy_fromio(adev->bios, bios, size);
143 pci_unmap_rom(adev->pdev, bios);
144
145 if (!check_atom_bios(adev->bios, size)) {
146 kfree(adev->bios);
147 return false;
148 }
149
150 return true;
151}
152
153static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
154{
155 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
156 int len;
157
158 if (!adev->asic_funcs->read_bios_from_rom)
159 return false;
160
161 /* validate VBIOS signature */
162 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
163 return false;
164 header[AMD_VBIOS_SIGNATURE_END] = 0;
165
166 if ((!AMD_IS_VALID_VBIOS(header)) ||
167 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
168 AMD_VBIOS_SIGNATURE,
169 strlen(AMD_VBIOS_SIGNATURE)))
170 return false;
171
172 /* valid vbios, go on */
173 len = AMD_VBIOS_LENGTH(header);
174 len = ALIGN(len, 4);
175 adev->bios = kmalloc(len, GFP_KERNEL);
176 if (!adev->bios) {
177 DRM_ERROR("no memory to allocate for BIOS\n");
178 return false;
179 }
180 adev->bios_size = len;
181
182 /* read complete BIOS */
183 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
184
185 if (!check_atom_bios(adev->bios, len)) {
186 kfree(adev->bios);
187 return false;
188 }
189
190 return true;
191}
192
193static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
194{
195 uint8_t __iomem *bios;
196 size_t size;
197
198 adev->bios = NULL;
199
200 bios = pci_platform_rom(adev->pdev, &size);
201 if (!bios) {
202 return false;
203 }
204
205 adev->bios = kzalloc(size, GFP_KERNEL);
206 if (adev->bios == NULL)
207 return false;
208
209 memcpy_fromio(adev->bios, bios, size);
210
211 if (!check_atom_bios(adev->bios, size)) {
212 kfree(adev->bios);
213 return false;
214 }
215
216 adev->bios_size = size;
217
218 return true;
219}
220
221#ifdef CONFIG_ACPI
222/* ATRM is used to get the BIOS on the discrete cards in
223 * dual-gpu systems.
224 */
225/* retrieve the ROM in 4k blocks */
226#define ATRM_BIOS_PAGE 4096
227/**
228 * amdgpu_atrm_call - fetch a chunk of the vbios
229 *
230 * @atrm_handle: acpi ATRM handle
231 * @bios: vbios image pointer
232 * @offset: offset of vbios image data to fetch
233 * @len: length of vbios image data to fetch
234 *
235 * Executes ATRM to fetch a chunk of the discrete
236 * vbios image on PX systems (all asics).
237 * Returns the length of the buffer fetched.
238 */
239static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
240 int offset, int len)
241{
242 acpi_status status;
243 union acpi_object atrm_arg_elements[2], *obj;
244 struct acpi_object_list atrm_arg;
245 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
246
247 atrm_arg.count = 2;
248 atrm_arg.pointer = &atrm_arg_elements[0];
249
250 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
251 atrm_arg_elements[0].integer.value = offset;
252
253 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
254 atrm_arg_elements[1].integer.value = len;
255
256 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
257 if (ACPI_FAILURE(status)) {
258 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
259 return -ENODEV;
260 }
261
262 obj = (union acpi_object *)buffer.pointer;
263 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
264 len = obj->buffer.length;
265 kfree(buffer.pointer);
266 return len;
267}
268
269static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
270{
271 int ret;
272 int size = 256 * 1024;
273 int i;
274 struct pci_dev *pdev = NULL;
275 acpi_handle dhandle, atrm_handle;
276 acpi_status status;
277 bool found = false;
278
279 /* ATRM is for the discrete card only */
280 if (adev->flags & AMD_IS_APU)
281 return false;
282
283 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
284 dhandle = ACPI_HANDLE(&pdev->dev);
285 if (!dhandle)
286 continue;
287
288 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
289 if (!ACPI_FAILURE(status)) {
290 found = true;
291 break;
292 }
293 }
294
295 if (!found) {
296 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
297 dhandle = ACPI_HANDLE(&pdev->dev);
298 if (!dhandle)
299 continue;
300
301 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
302 if (!ACPI_FAILURE(status)) {
303 found = true;
304 break;
305 }
306 }
307 }
308
309 if (!found)
310 return false;
311
312 adev->bios = kmalloc(size, GFP_KERNEL);
313 if (!adev->bios) {
314 DRM_ERROR("Unable to allocate bios\n");
315 return false;
316 }
317
318 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
319 ret = amdgpu_atrm_call(atrm_handle,
320 adev->bios,
321 (i * ATRM_BIOS_PAGE),
322 ATRM_BIOS_PAGE);
323 if (ret < ATRM_BIOS_PAGE)
324 break;
325 }
326
327 if (!check_atom_bios(adev->bios, size)) {
328 kfree(adev->bios);
329 return false;
330 }
331 adev->bios_size = size;
332 return true;
333}
334#else
335static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
336{
337 return false;
338}
339#endif
340
341static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
342{
343 if (adev->flags & AMD_IS_APU)
344 return igp_read_bios_from_vram(adev);
345 else
346 return amdgpu_asic_read_disabled_bios(adev);
347}
348
349#ifdef CONFIG_ACPI
350static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
351{
352 struct acpi_table_header *hdr;
353 acpi_size tbl_size;
354 UEFI_ACPI_VFCT *vfct;
355 unsigned offset;
356
357 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
358 return false;
359 tbl_size = hdr->length;
360 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
361 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
362 return false;
363 }
364
365 vfct = (UEFI_ACPI_VFCT *)hdr;
366 offset = vfct->VBIOSImageOffset;
367
368 while (offset < tbl_size) {
369 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
370 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
371
372 offset += sizeof(VFCT_IMAGE_HEADER);
373 if (offset > tbl_size) {
374 DRM_ERROR("ACPI VFCT image header truncated\n");
375 return false;
376 }
377
378 offset += vhdr->ImageLength;
379 if (offset > tbl_size) {
380 DRM_ERROR("ACPI VFCT image truncated\n");
381 return false;
382 }
383
384 if (vhdr->ImageLength &&
385 vhdr->PCIBus == adev->pdev->bus->number &&
386 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
387 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
388 vhdr->VendorID == adev->pdev->vendor &&
389 vhdr->DeviceID == adev->pdev->device) {
390 adev->bios = kmemdup(&vbios->VbiosContent,
391 vhdr->ImageLength,
392 GFP_KERNEL);
393
394 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
395 kfree(adev->bios);
396 return false;
397 }
398 adev->bios_size = vhdr->ImageLength;
399 return true;
400 }
401 }
402
403 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
404 return false;
405}
406#else
407static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
408{
409 return false;
410}
411#endif
412
413bool amdgpu_get_bios(struct amdgpu_device *adev)
414{
415 if (amdgpu_atrm_get_bios(adev))
416 goto success;
417
418 if (amdgpu_acpi_vfct_bios(adev))
419 goto success;
420
421 if (igp_read_bios_from_vram(adev))
422 goto success;
423
424 if (amdgpu_read_bios(adev))
425 goto success;
426
427 if (amdgpu_read_bios_from_rom(adev))
428 goto success;
429
430 if (amdgpu_read_disabled_bios(adev))
431 goto success;
432
433 if (amdgpu_read_platform_bios(adev))
434 goto success;
435
436 DRM_ERROR("Unable to locate a BIOS ROM\n");
437 return false;
438
439success:
440 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;
441 return true;
442}