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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
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 /* FB BAR not enabled */
101 if (pci_resource_len(adev->pdev, 0) == 0)
102 return false;
103
104 adev->bios = NULL;
105 vram_base = pci_resource_start(adev->pdev, 0);
106 bios = ioremap_wc(vram_base, size);
107 if (!bios) {
108 return false;
109 }
110
111 adev->bios = kmalloc(size, GFP_KERNEL);
112 if (!adev->bios) {
113 iounmap(bios);
114 return false;
115 }
116 adev->bios_size = size;
117 memcpy_fromio(adev->bios, bios, size);
118 iounmap(bios);
119
120 if (!check_atom_bios(adev->bios, size)) {
121 kfree(adev->bios);
122 return false;
123 }
124
125 return true;
126}
127
128bool amdgpu_read_bios(struct amdgpu_device *adev)
129{
130 uint8_t __iomem *bios;
131 size_t size;
132
133 adev->bios = NULL;
134 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
135 bios = pci_map_rom(adev->pdev, &size);
136 if (!bios) {
137 return false;
138 }
139
140 adev->bios = kzalloc(size, GFP_KERNEL);
141 if (adev->bios == NULL) {
142 pci_unmap_rom(adev->pdev, bios);
143 return false;
144 }
145 adev->bios_size = size;
146 memcpy_fromio(adev->bios, bios, size);
147 pci_unmap_rom(adev->pdev, bios);
148
149 if (!check_atom_bios(adev->bios, size)) {
150 kfree(adev->bios);
151 return false;
152 }
153
154 return true;
155}
156
157static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
158{
159 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
160 int len;
161
162 if (!adev->asic_funcs || !adev->asic_funcs->read_bios_from_rom)
163 return false;
164
165 /* validate VBIOS signature */
166 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
167 return false;
168 header[AMD_VBIOS_SIGNATURE_END] = 0;
169
170 if ((!AMD_IS_VALID_VBIOS(header)) ||
171 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
172 AMD_VBIOS_SIGNATURE,
173 strlen(AMD_VBIOS_SIGNATURE)))
174 return false;
175
176 /* valid vbios, go on */
177 len = AMD_VBIOS_LENGTH(header);
178 len = ALIGN(len, 4);
179 adev->bios = kmalloc(len, GFP_KERNEL);
180 if (!adev->bios) {
181 DRM_ERROR("no memory to allocate for BIOS\n");
182 return false;
183 }
184 adev->bios_size = len;
185
186 /* read complete BIOS */
187 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
188
189 if (!check_atom_bios(adev->bios, len)) {
190 kfree(adev->bios);
191 return false;
192 }
193
194 return true;
195}
196
197static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
198{
199 phys_addr_t rom = adev->pdev->rom;
200 size_t romlen = adev->pdev->romlen;
201 void __iomem *bios;
202
203 adev->bios = NULL;
204
205 if (!rom || romlen == 0)
206 return false;
207
208 adev->bios = kzalloc(romlen, GFP_KERNEL);
209 if (!adev->bios)
210 return false;
211
212 bios = ioremap(rom, romlen);
213 if (!bios)
214 goto free_bios;
215
216 memcpy_fromio(adev->bios, bios, romlen);
217 iounmap(bios);
218
219 if (!check_atom_bios(adev->bios, romlen))
220 goto free_bios;
221
222 adev->bios_size = romlen;
223
224 return true;
225free_bios:
226 kfree(adev->bios);
227 return false;
228}
229
230#ifdef CONFIG_ACPI
231/* ATRM is used to get the BIOS on the discrete cards in
232 * dual-gpu systems.
233 */
234/* retrieve the ROM in 4k blocks */
235#define ATRM_BIOS_PAGE 4096
236/**
237 * amdgpu_atrm_call - fetch a chunk of the vbios
238 *
239 * @atrm_handle: acpi ATRM handle
240 * @bios: vbios image pointer
241 * @offset: offset of vbios image data to fetch
242 * @len: length of vbios image data to fetch
243 *
244 * Executes ATRM to fetch a chunk of the discrete
245 * vbios image on PX systems (all asics).
246 * Returns the length of the buffer fetched.
247 */
248static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
249 int offset, int len)
250{
251 acpi_status status;
252 union acpi_object atrm_arg_elements[2], *obj;
253 struct acpi_object_list atrm_arg;
254 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
255
256 atrm_arg.count = 2;
257 atrm_arg.pointer = &atrm_arg_elements[0];
258
259 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
260 atrm_arg_elements[0].integer.value = offset;
261
262 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
263 atrm_arg_elements[1].integer.value = len;
264
265 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
266 if (ACPI_FAILURE(status)) {
267 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
268 return -ENODEV;
269 }
270
271 obj = (union acpi_object *)buffer.pointer;
272 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
273 len = obj->buffer.length;
274 kfree(buffer.pointer);
275 return len;
276}
277
278static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
279{
280 int ret;
281 int size = 256 * 1024;
282 int i;
283 struct pci_dev *pdev = NULL;
284 acpi_handle dhandle, atrm_handle;
285 acpi_status status;
286 bool found = false;
287
288 /* ATRM is for the discrete card only */
289 if (adev->flags & AMD_IS_APU)
290 return false;
291
292 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
293 dhandle = ACPI_HANDLE(&pdev->dev);
294 if (!dhandle)
295 continue;
296
297 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
298 if (ACPI_SUCCESS(status)) {
299 found = true;
300 break;
301 }
302 }
303
304 if (!found) {
305 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
306 dhandle = ACPI_HANDLE(&pdev->dev);
307 if (!dhandle)
308 continue;
309
310 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
311 if (ACPI_SUCCESS(status)) {
312 found = true;
313 break;
314 }
315 }
316 }
317
318 if (!found)
319 return false;
320
321 adev->bios = kmalloc(size, GFP_KERNEL);
322 if (!adev->bios) {
323 dev_err(adev->dev, "Unable to allocate bios\n");
324 return false;
325 }
326
327 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
328 ret = amdgpu_atrm_call(atrm_handle,
329 adev->bios,
330 (i * ATRM_BIOS_PAGE),
331 ATRM_BIOS_PAGE);
332 if (ret < ATRM_BIOS_PAGE)
333 break;
334 }
335
336 if (!check_atom_bios(adev->bios, size)) {
337 kfree(adev->bios);
338 return false;
339 }
340 adev->bios_size = size;
341 return true;
342}
343#else
344static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
345{
346 return false;
347}
348#endif
349
350static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
351{
352 if (adev->flags & AMD_IS_APU)
353 return igp_read_bios_from_vram(adev);
354 else
355 return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ?
356 false : amdgpu_asic_read_disabled_bios(adev);
357}
358
359#ifdef CONFIG_ACPI
360static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
361{
362 struct acpi_table_header *hdr;
363 acpi_size tbl_size;
364 UEFI_ACPI_VFCT *vfct;
365 unsigned offset;
366
367 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
368 return false;
369 tbl_size = hdr->length;
370 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
371 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #1),skipping\n");
372 return false;
373 }
374
375 vfct = (UEFI_ACPI_VFCT *)hdr;
376 offset = vfct->VBIOSImageOffset;
377
378 while (offset < tbl_size) {
379 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
380 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
381
382 offset += sizeof(VFCT_IMAGE_HEADER);
383 if (offset > tbl_size) {
384 dev_info(adev->dev, "ACPI VFCT image header truncated,skipping\n");
385 return false;
386 }
387
388 offset += vhdr->ImageLength;
389 if (offset > tbl_size) {
390 dev_info(adev->dev, "ACPI VFCT image truncated,skipping\n");
391 return false;
392 }
393
394 if (vhdr->ImageLength &&
395 vhdr->PCIBus == adev->pdev->bus->number &&
396 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
397 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
398 vhdr->VendorID == adev->pdev->vendor &&
399 vhdr->DeviceID == adev->pdev->device) {
400 adev->bios = kmemdup(&vbios->VbiosContent,
401 vhdr->ImageLength,
402 GFP_KERNEL);
403
404 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
405 kfree(adev->bios);
406 return false;
407 }
408 adev->bios_size = vhdr->ImageLength;
409 return true;
410 }
411 }
412
413 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #2),skipping\n");
414 return false;
415}
416#else
417static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
418{
419 return false;
420}
421#endif
422
423bool amdgpu_get_bios(struct amdgpu_device *adev)
424{
425 if (amdgpu_atrm_get_bios(adev)) {
426 dev_info(adev->dev, "Fetched VBIOS from ATRM\n");
427 goto success;
428 }
429
430 if (amdgpu_acpi_vfct_bios(adev)) {
431 dev_info(adev->dev, "Fetched VBIOS from VFCT\n");
432 goto success;
433 }
434
435 if (igp_read_bios_from_vram(adev)) {
436 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n");
437 goto success;
438 }
439
440 if (amdgpu_read_bios(adev)) {
441 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
442 goto success;
443 }
444
445 if (amdgpu_read_bios_from_rom(adev)) {
446 dev_info(adev->dev, "Fetched VBIOS from ROM\n");
447 goto success;
448 }
449
450 if (amdgpu_read_disabled_bios(adev)) {
451 dev_info(adev->dev, "Fetched VBIOS from disabled ROM BAR\n");
452 goto success;
453 }
454
455 if (amdgpu_read_platform_bios(adev)) {
456 dev_info(adev->dev, "Fetched VBIOS from platform\n");
457 goto success;
458 }
459
460 dev_err(adev->dev, "Unable to locate a BIOS ROM\n");
461 return false;
462
463success:
464 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;
465 return true;
466}
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}