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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/* 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 == NULL) {
74 iounmap(bios);
75 return false;
76 }
77 memcpy_fromio(adev->bios, bios, size);
78 iounmap(bios);
79 return true;
80}
81
82bool amdgpu_read_bios(struct amdgpu_device *adev)
83{
84 uint8_t __iomem *bios, val[2];
85 size_t size;
86
87 adev->bios = NULL;
88 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
89 bios = pci_map_rom(adev->pdev, &size);
90 if (!bios) {
91 return false;
92 }
93
94 val[0] = readb(&bios[0]);
95 val[1] = readb(&bios[1]);
96
97 if (size == 0 || !AMD_IS_VALID_VBIOS(val)) {
98 pci_unmap_rom(adev->pdev, bios);
99 return false;
100 }
101 adev->bios = kzalloc(size, GFP_KERNEL);
102 if (adev->bios == NULL) {
103 pci_unmap_rom(adev->pdev, bios);
104 return false;
105 }
106 memcpy_fromio(adev->bios, bios, size);
107 pci_unmap_rom(adev->pdev, bios);
108 return true;
109}
110
111static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
112{
113 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
114 int len;
115
116 if (!adev->asic_funcs->read_bios_from_rom)
117 return false;
118
119 /* validate VBIOS signature */
120 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
121 return false;
122 header[AMD_VBIOS_SIGNATURE_END] = 0;
123
124 if ((!AMD_IS_VALID_VBIOS(header)) ||
125 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
126 AMD_VBIOS_SIGNATURE,
127 strlen(AMD_VBIOS_SIGNATURE)))
128 return false;
129
130 /* valid vbios, go on */
131 len = AMD_VBIOS_LENGTH(header);
132 len = ALIGN(len, 4);
133 adev->bios = kmalloc(len, GFP_KERNEL);
134 if (!adev->bios) {
135 DRM_ERROR("no memory to allocate for BIOS\n");
136 return false;
137 }
138
139 /* read complete BIOS */
140 return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
141}
142
143static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
144{
145 uint8_t __iomem *bios;
146 size_t size;
147
148 adev->bios = NULL;
149
150 bios = pci_platform_rom(adev->pdev, &size);
151 if (!bios) {
152 return false;
153 }
154
155 if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
156 return false;
157 }
158 adev->bios = kmemdup(bios, size, GFP_KERNEL);
159 if (adev->bios == NULL) {
160 return false;
161 }
162
163 return true;
164}
165
166#ifdef CONFIG_ACPI
167/* ATRM is used to get the BIOS on the discrete cards in
168 * dual-gpu systems.
169 */
170/* retrieve the ROM in 4k blocks */
171#define ATRM_BIOS_PAGE 4096
172/**
173 * amdgpu_atrm_call - fetch a chunk of the vbios
174 *
175 * @atrm_handle: acpi ATRM handle
176 * @bios: vbios image pointer
177 * @offset: offset of vbios image data to fetch
178 * @len: length of vbios image data to fetch
179 *
180 * Executes ATRM to fetch a chunk of the discrete
181 * vbios image on PX systems (all asics).
182 * Returns the length of the buffer fetched.
183 */
184static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
185 int offset, int len)
186{
187 acpi_status status;
188 union acpi_object atrm_arg_elements[2], *obj;
189 struct acpi_object_list atrm_arg;
190 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
191
192 atrm_arg.count = 2;
193 atrm_arg.pointer = &atrm_arg_elements[0];
194
195 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
196 atrm_arg_elements[0].integer.value = offset;
197
198 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
199 atrm_arg_elements[1].integer.value = len;
200
201 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
202 if (ACPI_FAILURE(status)) {
203 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
204 return -ENODEV;
205 }
206
207 obj = (union acpi_object *)buffer.pointer;
208 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
209 len = obj->buffer.length;
210 kfree(buffer.pointer);
211 return len;
212}
213
214static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
215{
216 int ret;
217 int size = 256 * 1024;
218 int i;
219 struct pci_dev *pdev = NULL;
220 acpi_handle dhandle, atrm_handle;
221 acpi_status status;
222 bool found = false;
223
224 /* ATRM is for the discrete card only */
225 if (adev->flags & AMD_IS_APU)
226 return false;
227
228 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
229 dhandle = ACPI_HANDLE(&pdev->dev);
230 if (!dhandle)
231 continue;
232
233 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
234 if (!ACPI_FAILURE(status)) {
235 found = true;
236 break;
237 }
238 }
239
240 if (!found) {
241 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
242 dhandle = ACPI_HANDLE(&pdev->dev);
243 if (!dhandle)
244 continue;
245
246 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
247 if (!ACPI_FAILURE(status)) {
248 found = true;
249 break;
250 }
251 }
252 }
253
254 if (!found)
255 return false;
256
257 adev->bios = kmalloc(size, GFP_KERNEL);
258 if (!adev->bios) {
259 DRM_ERROR("Unable to allocate bios\n");
260 return false;
261 }
262
263 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
264 ret = amdgpu_atrm_call(atrm_handle,
265 adev->bios,
266 (i * ATRM_BIOS_PAGE),
267 ATRM_BIOS_PAGE);
268 if (ret < ATRM_BIOS_PAGE)
269 break;
270 }
271
272 if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) {
273 kfree(adev->bios);
274 return false;
275 }
276 return true;
277}
278#else
279static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
280{
281 return false;
282}
283#endif
284
285static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
286{
287 if (adev->flags & AMD_IS_APU)
288 return igp_read_bios_from_vram(adev);
289 else
290 return amdgpu_asic_read_disabled_bios(adev);
291}
292
293#ifdef CONFIG_ACPI
294static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
295{
296 bool ret = false;
297 struct acpi_table_header *hdr;
298 acpi_size tbl_size;
299 UEFI_ACPI_VFCT *vfct;
300 GOP_VBIOS_CONTENT *vbios;
301 VFCT_IMAGE_HEADER *vhdr;
302
303 if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr, &tbl_size)))
304 return false;
305 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
306 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
307 goto out_unmap;
308 }
309
310 vfct = (UEFI_ACPI_VFCT *)hdr;
311 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) {
312 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
313 goto out_unmap;
314 }
315
316 vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset);
317 vhdr = &vbios->VbiosHeader;
318 DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",
319 vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction,
320 vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength);
321
322 if (vhdr->PCIBus != adev->pdev->bus->number ||
323 vhdr->PCIDevice != PCI_SLOT(adev->pdev->devfn) ||
324 vhdr->PCIFunction != PCI_FUNC(adev->pdev->devfn) ||
325 vhdr->VendorID != adev->pdev->vendor ||
326 vhdr->DeviceID != adev->pdev->device) {
327 DRM_INFO("ACPI VFCT table is not for this card\n");
328 goto out_unmap;
329 }
330
331 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {
332 DRM_ERROR("ACPI VFCT image truncated\n");
333 goto out_unmap;
334 }
335
336 adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);
337 ret = !!adev->bios;
338
339out_unmap:
340 return ret;
341}
342#else
343static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
344{
345 return false;
346}
347#endif
348
349bool amdgpu_get_bios(struct amdgpu_device *adev)
350{
351 bool r;
352 uint16_t tmp;
353
354 r = amdgpu_atrm_get_bios(adev);
355 if (r == false)
356 r = amdgpu_acpi_vfct_bios(adev);
357 if (r == false)
358 r = igp_read_bios_from_vram(adev);
359 if (r == false)
360 r = amdgpu_read_bios(adev);
361 if (r == false) {
362 r = amdgpu_read_bios_from_rom(adev);
363 }
364 if (r == false) {
365 r = amdgpu_read_disabled_bios(adev);
366 }
367 if (r == false) {
368 r = amdgpu_read_platform_bios(adev);
369 }
370 if (r == false || adev->bios == NULL) {
371 DRM_ERROR("Unable to locate a BIOS ROM\n");
372 adev->bios = NULL;
373 return false;
374 }
375 if (!AMD_IS_VALID_VBIOS(adev->bios)) {
376 printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]);
377 goto free_bios;
378 }
379
380 tmp = RBIOS16(0x18);
381 if (RBIOS8(tmp + 0x14) != 0x0) {
382 DRM_INFO("Not an x86 BIOS ROM, not using.\n");
383 goto free_bios;
384 }
385
386 adev->bios_header_start = RBIOS16(0x48);
387 if (!adev->bios_header_start) {
388 goto free_bios;
389 }
390 tmp = adev->bios_header_start + 4;
391 if (!memcmp(adev->bios + tmp, "ATOM", 4) ||
392 !memcmp(adev->bios + tmp, "MOTA", 4)) {
393 adev->is_atom_bios = true;
394 } else {
395 adev->is_atom_bios = false;
396 }
397
398 DRM_DEBUG("%sBIOS detected\n", adev->is_atom_bios ? "ATOM" : "COM");
399 return true;
400free_bios:
401 kfree(adev->bios);
402 adev->bios = NULL;
403 return false;
404}
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 pci_dev_put(pdev);
321
322 adev->bios = kmalloc(size, GFP_KERNEL);
323 if (!adev->bios) {
324 dev_err(adev->dev, "Unable to allocate bios\n");
325 return false;
326 }
327
328 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
329 ret = amdgpu_atrm_call(atrm_handle,
330 adev->bios,
331 (i * ATRM_BIOS_PAGE),
332 ATRM_BIOS_PAGE);
333 if (ret < ATRM_BIOS_PAGE)
334 break;
335 }
336
337 if (!check_atom_bios(adev->bios, size)) {
338 kfree(adev->bios);
339 return false;
340 }
341 adev->bios_size = size;
342 return true;
343}
344#else
345static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
346{
347 return false;
348}
349#endif
350
351static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
352{
353 if (adev->flags & AMD_IS_APU)
354 return igp_read_bios_from_vram(adev);
355 else
356 return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ?
357 false : amdgpu_asic_read_disabled_bios(adev);
358}
359
360#ifdef CONFIG_ACPI
361static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
362{
363 struct acpi_table_header *hdr;
364 acpi_size tbl_size;
365 UEFI_ACPI_VFCT *vfct;
366 unsigned offset;
367
368 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
369 return false;
370 tbl_size = hdr->length;
371 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
372 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #1),skipping\n");
373 return false;
374 }
375
376 vfct = (UEFI_ACPI_VFCT *)hdr;
377 offset = vfct->VBIOSImageOffset;
378
379 while (offset < tbl_size) {
380 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
381 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
382
383 offset += sizeof(VFCT_IMAGE_HEADER);
384 if (offset > tbl_size) {
385 dev_info(adev->dev, "ACPI VFCT image header truncated,skipping\n");
386 return false;
387 }
388
389 offset += vhdr->ImageLength;
390 if (offset > tbl_size) {
391 dev_info(adev->dev, "ACPI VFCT image truncated,skipping\n");
392 return false;
393 }
394
395 if (vhdr->ImageLength &&
396 vhdr->PCIBus == adev->pdev->bus->number &&
397 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
398 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
399 vhdr->VendorID == adev->pdev->vendor &&
400 vhdr->DeviceID == adev->pdev->device) {
401 adev->bios = kmemdup(&vbios->VbiosContent,
402 vhdr->ImageLength,
403 GFP_KERNEL);
404
405 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
406 kfree(adev->bios);
407 return false;
408 }
409 adev->bios_size = vhdr->ImageLength;
410 return true;
411 }
412 }
413
414 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #2),skipping\n");
415 return false;
416}
417#else
418static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
419{
420 return false;
421}
422#endif
423
424bool amdgpu_get_bios(struct amdgpu_device *adev)
425{
426 if (amdgpu_atrm_get_bios(adev)) {
427 dev_info(adev->dev, "Fetched VBIOS from ATRM\n");
428 goto success;
429 }
430
431 if (amdgpu_acpi_vfct_bios(adev)) {
432 dev_info(adev->dev, "Fetched VBIOS from VFCT\n");
433 goto success;
434 }
435
436 if (igp_read_bios_from_vram(adev)) {
437 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n");
438 goto success;
439 }
440
441 if (amdgpu_read_bios(adev)) {
442 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
443 goto success;
444 }
445
446 if (amdgpu_read_bios_from_rom(adev)) {
447 dev_info(adev->dev, "Fetched VBIOS from ROM\n");
448 goto success;
449 }
450
451 if (amdgpu_read_disabled_bios(adev)) {
452 dev_info(adev->dev, "Fetched VBIOS from disabled ROM BAR\n");
453 goto success;
454 }
455
456 if (amdgpu_read_platform_bios(adev)) {
457 dev_info(adev->dev, "Fetched VBIOS from platform\n");
458 goto success;
459 }
460
461 dev_err(adev->dev, "Unable to locate a BIOS ROM\n");
462 return false;
463
464success:
465 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;
466 return true;
467}
468
469/* helper function for soc15 and onwards to read bios from rom */
470bool amdgpu_soc15_read_bios_from_rom(struct amdgpu_device *adev,
471 u8 *bios, u32 length_bytes)
472{
473 u32 *dw_ptr;
474 u32 i, length_dw;
475 u32 rom_offset;
476 u32 rom_index_offset;
477 u32 rom_data_offset;
478
479 if (bios == NULL)
480 return false;
481 if (length_bytes == 0)
482 return false;
483 /* APU vbios image is part of sbios image */
484 if (adev->flags & AMD_IS_APU)
485 return false;
486 if (!adev->smuio.funcs ||
487 !adev->smuio.funcs->get_rom_index_offset ||
488 !adev->smuio.funcs->get_rom_data_offset)
489 return false;
490
491 dw_ptr = (u32 *)bios;
492 length_dw = ALIGN(length_bytes, 4) / 4;
493
494 rom_index_offset =
495 adev->smuio.funcs->get_rom_index_offset(adev);
496 rom_data_offset =
497 adev->smuio.funcs->get_rom_data_offset(adev);
498
499 if (adev->nbio.funcs &&
500 adev->nbio.funcs->get_rom_offset) {
501 rom_offset = adev->nbio.funcs->get_rom_offset(adev);
502 rom_offset = rom_offset << 17;
503 } else {
504 rom_offset = 0;
505 }
506
507 /* set rom index to rom_offset */
508 WREG32(rom_index_offset, rom_offset);
509 /* read out the rom data */
510 for (i = 0; i < length_dw; i++)
511 dw_ptr[i] = RREG32(rom_data_offset);
512
513 return true;
514}