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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#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/* 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
49 * present.
50 */
51static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
52{
53 uint8_t __iomem *bios;
54 resource_size_t vram_base;
55 resource_size_t size = 256 * 1024; /* ??? */
56
57 if (!(adev->flags & AMD_IS_APU))
58 if (!amdgpu_card_posted(adev))
59 return false;
60
61 adev->bios = NULL;
62 vram_base = pci_resource_start(adev->pdev, 0);
63 bios = ioremap(vram_base, size);
64 if (!bios) {
65 return false;
66 }
67
68 if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
69 iounmap(bios);
70 return false;
71 }
72 adev->bios = kmalloc(size, GFP_KERNEL);
73 if (!adev->bios) {
74 iounmap(bios);
75 return false;
76 }
77 adev->bios_size = size;
78 memcpy_fromio(adev->bios, bios, size);
79 iounmap(bios);
80 return true;
81}
82
83bool amdgpu_read_bios(struct amdgpu_device *adev)
84{
85 uint8_t __iomem *bios, val[2];
86 size_t size;
87
88 adev->bios = NULL;
89 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
90 bios = pci_map_rom(adev->pdev, &size);
91 if (!bios) {
92 return false;
93 }
94
95 val[0] = readb(&bios[0]);
96 val[1] = readb(&bios[1]);
97
98 if (size == 0 || !AMD_IS_VALID_VBIOS(val)) {
99 pci_unmap_rom(adev->pdev, bios);
100 return false;
101 }
102 adev->bios = kzalloc(size, GFP_KERNEL);
103 if (adev->bios == NULL) {
104 pci_unmap_rom(adev->pdev, bios);
105 return false;
106 }
107 adev->bios_size = size;
108 memcpy_fromio(adev->bios, bios, size);
109 pci_unmap_rom(adev->pdev, bios);
110 return true;
111}
112
113static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
114{
115 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
116 int len;
117
118 if (!adev->asic_funcs->read_bios_from_rom)
119 return false;
120
121 /* validate VBIOS signature */
122 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
123 return false;
124 header[AMD_VBIOS_SIGNATURE_END] = 0;
125
126 if ((!AMD_IS_VALID_VBIOS(header)) ||
127 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
128 AMD_VBIOS_SIGNATURE,
129 strlen(AMD_VBIOS_SIGNATURE)))
130 return false;
131
132 /* valid vbios, go on */
133 len = AMD_VBIOS_LENGTH(header);
134 len = ALIGN(len, 4);
135 adev->bios = kmalloc(len, GFP_KERNEL);
136 if (!adev->bios) {
137 DRM_ERROR("no memory to allocate for BIOS\n");
138 return false;
139 }
140 adev->bios_size = len;
141
142 /* read complete BIOS */
143 return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
144}
145
146static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
147{
148 uint8_t __iomem *bios;
149 size_t size;
150
151 adev->bios = NULL;
152
153 bios = pci_platform_rom(adev->pdev, &size);
154 if (!bios) {
155 return false;
156 }
157
158 if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
159 return false;
160 }
161 adev->bios = kmemdup(bios, size, GFP_KERNEL);
162 if (adev->bios == NULL) {
163 return false;
164 }
165 adev->bios_size = size;
166
167 return true;
168}
169
170#ifdef CONFIG_ACPI
171/* ATRM is used to get the BIOS on the discrete cards in
172 * dual-gpu systems.
173 */
174/* retrieve the ROM in 4k blocks */
175#define ATRM_BIOS_PAGE 4096
176/**
177 * amdgpu_atrm_call - fetch a chunk of the vbios
178 *
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
183 *
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.
187 */
188static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
189 int offset, int len)
190{
191 acpi_status status;
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};
195
196 atrm_arg.count = 2;
197 atrm_arg.pointer = &atrm_arg_elements[0];
198
199 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
200 atrm_arg_elements[0].integer.value = offset;
201
202 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
203 atrm_arg_elements[1].integer.value = len;
204
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));
208 return -ENODEV;
209 }
210
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);
215 return len;
216}
217
218static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
219{
220 int ret;
221 int size = 256 * 1024;
222 int i;
223 struct pci_dev *pdev = NULL;
224 acpi_handle dhandle, atrm_handle;
225 acpi_status status;
226 bool found = false;
227
228 /* ATRM is for the discrete card only */
229 if (adev->flags & AMD_IS_APU)
230 return false;
231
232 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
233 dhandle = ACPI_HANDLE(&pdev->dev);
234 if (!dhandle)
235 continue;
236
237 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
238 if (!ACPI_FAILURE(status)) {
239 found = true;
240 break;
241 }
242 }
243
244 if (!found) {
245 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
246 dhandle = ACPI_HANDLE(&pdev->dev);
247 if (!dhandle)
248 continue;
249
250 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
251 if (!ACPI_FAILURE(status)) {
252 found = true;
253 break;
254 }
255 }
256 }
257
258 if (!found)
259 return false;
260
261 adev->bios = kmalloc(size, GFP_KERNEL);
262 if (!adev->bios) {
263 DRM_ERROR("Unable to allocate bios\n");
264 return false;
265 }
266
267 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
268 ret = amdgpu_atrm_call(atrm_handle,
269 adev->bios,
270 (i * ATRM_BIOS_PAGE),
271 ATRM_BIOS_PAGE);
272 if (ret < ATRM_BIOS_PAGE)
273 break;
274 }
275
276 if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) {
277 kfree(adev->bios);
278 return false;
279 }
280 adev->bios_size = size;
281 return true;
282}
283#else
284static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
285{
286 return false;
287}
288#endif
289
290static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
291{
292 if (adev->flags & AMD_IS_APU)
293 return igp_read_bios_from_vram(adev);
294 else
295 return amdgpu_asic_read_disabled_bios(adev);
296}
297
298#ifdef CONFIG_ACPI
299static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
300{
301 bool ret = false;
302 struct acpi_table_header *hdr;
303 acpi_size tbl_size;
304 UEFI_ACPI_VFCT *vfct;
305 GOP_VBIOS_CONTENT *vbios;
306 VFCT_IMAGE_HEADER *vhdr;
307
308 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
309 return false;
310 tbl_size = hdr->length;
311 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
312 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
313 goto out_unmap;
314 }
315
316 vfct = (UEFI_ACPI_VFCT *)hdr;
317 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) {
318 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
319 goto out_unmap;
320 }
321
322 vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset);
323 vhdr = &vbios->VbiosHeader;
324 DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",
325 vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction,
326 vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength);
327
328 if (vhdr->PCIBus != adev->pdev->bus->number ||
329 vhdr->PCIDevice != PCI_SLOT(adev->pdev->devfn) ||
330 vhdr->PCIFunction != PCI_FUNC(adev->pdev->devfn) ||
331 vhdr->VendorID != adev->pdev->vendor ||
332 vhdr->DeviceID != adev->pdev->device) {
333 DRM_INFO("ACPI VFCT table is not for this card\n");
334 goto out_unmap;
335 }
336
337 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {
338 DRM_ERROR("ACPI VFCT image truncated\n");
339 goto out_unmap;
340 }
341
342 adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);
343 adev->bios_size = vhdr->ImageLength;
344 ret = !!adev->bios;
345
346out_unmap:
347 return ret;
348}
349#else
350static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
351{
352 return false;
353}
354#endif
355
356bool amdgpu_get_bios(struct amdgpu_device *adev)
357{
358 bool r;
359 uint16_t tmp, bios_header_start;
360
361 r = amdgpu_atrm_get_bios(adev);
362 if (!r)
363 r = amdgpu_acpi_vfct_bios(adev);
364 if (!r)
365 r = igp_read_bios_from_vram(adev);
366 if (!r)
367 r = amdgpu_read_bios(adev);
368 if (!r) {
369 r = amdgpu_read_bios_from_rom(adev);
370 }
371 if (!r) {
372 r = amdgpu_read_disabled_bios(adev);
373 }
374 if (!r) {
375 r = amdgpu_read_platform_bios(adev);
376 }
377 if (!r || adev->bios == NULL) {
378 DRM_ERROR("Unable to locate a BIOS ROM\n");
379 adev->bios = NULL;
380 return false;
381 }
382 if (!AMD_IS_VALID_VBIOS(adev->bios)) {
383 printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]);
384 goto free_bios;
385 }
386
387 tmp = RBIOS16(0x18);
388 if (RBIOS8(tmp + 0x14) != 0x0) {
389 DRM_INFO("Not an x86 BIOS ROM, not using.\n");
390 goto free_bios;
391 }
392
393 bios_header_start = RBIOS16(0x48);
394 if (!bios_header_start) {
395 goto free_bios;
396 }
397 tmp = bios_header_start + 4;
398 if (!memcmp(adev->bios + tmp, "ATOM", 4) ||
399 !memcmp(adev->bios + tmp, "MOTA", 4)) {
400 adev->is_atom_bios = true;
401 } else {
402 adev->is_atom_bios = false;
403 }
404
405 DRM_DEBUG("%sBIOS detected\n", adev->is_atom_bios ? "ATOM" : "COM");
406 return true;
407free_bios:
408 kfree(adev->bios);
409 adev->bios = NULL;
410 return false;
411}