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d38ceaf9 AD |
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 | ||
d38ceaf9 AD |
32 | #include <linux/slab.h> |
33 | #include <linux/acpi.h> | |
34 | /* | |
35 | * BIOS. | |
36 | */ | |
37 | ||
f930b2e8 | 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 | ||
d38ceaf9 AD |
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 | */ | |
51 | static 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 | ||
2f7d10b3 | 57 | if (!(adev->flags & AMD_IS_APU)) |
d38ceaf9 AD |
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 | ||
f930b2e8 | 68 | if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) { |
d38ceaf9 AD |
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 | ||
82 | bool amdgpu_read_bios(struct amdgpu_device *adev) | |
83 | { | |
f930b2e8 | 84 | uint8_t __iomem *bios, val[2]; |
d38ceaf9 AD |
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 | ||
f930b2e8 | 94 | val[0] = readb(&bios[0]); |
95 | val[1] = readb(&bios[1]); | |
18da4340 | 96 | |
f930b2e8 | 97 | if (size == 0 || !AMD_IS_VALID_VBIOS(val)) { |
d38ceaf9 AD |
98 | pci_unmap_rom(adev->pdev, bios); |
99 | return false; | |
100 | } | |
18da4340 | 101 | adev->bios = kzalloc(size, GFP_KERNEL); |
d38ceaf9 AD |
102 | if (adev->bios == NULL) { |
103 | pci_unmap_rom(adev->pdev, bios); | |
104 | return false; | |
105 | } | |
18da4340 | 106 | memcpy_fromio(adev->bios, bios, size); |
d38ceaf9 AD |
107 | pci_unmap_rom(adev->pdev, bios); |
108 | return true; | |
109 | } | |
110 | ||
f930b2e8 | 111 | static 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 | ||
d38ceaf9 AD |
143 | static 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 | ||
f930b2e8 | 155 | if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) { |
d38ceaf9 AD |
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 | */ | |
184 | static 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 | ||
214 | static 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 */ | |
2f7d10b3 | 225 | if (adev->flags & AMD_IS_APU) |
d38ceaf9 AD |
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 | ||
f930b2e8 | 272 | if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) { |
d38ceaf9 AD |
273 | kfree(adev->bios); |
274 | return false; | |
275 | } | |
276 | return true; | |
277 | } | |
278 | #else | |
279 | static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) | |
280 | { | |
281 | return false; | |
282 | } | |
283 | #endif | |
284 | ||
285 | static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev) | |
286 | { | |
2f7d10b3 | 287 | if (adev->flags & AMD_IS_APU) |
d38ceaf9 AD |
288 | return igp_read_bios_from_vram(adev); |
289 | else | |
290 | return amdgpu_asic_read_disabled_bios(adev); | |
291 | } | |
292 | ||
293 | #ifdef CONFIG_ACPI | |
294 | static 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 | ||
339 | out_unmap: | |
340 | return ret; | |
341 | } | |
342 | #else | |
343 | static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) | |
344 | { | |
345 | return false; | |
346 | } | |
347 | #endif | |
348 | ||
349 | bool amdgpu_get_bios(struct amdgpu_device *adev) | |
350 | { | |
351 | bool r; | |
379548f5 | 352 | uint16_t tmp, bios_header_start; |
d38ceaf9 AD |
353 | |
354 | r = amdgpu_atrm_get_bios(adev); | |
004e29cc | 355 | if (!r) |
d38ceaf9 | 356 | r = amdgpu_acpi_vfct_bios(adev); |
004e29cc | 357 | if (!r) |
d38ceaf9 | 358 | r = igp_read_bios_from_vram(adev); |
004e29cc | 359 | if (!r) |
d38ceaf9 | 360 | r = amdgpu_read_bios(adev); |
004e29cc | 361 | if (!r) { |
f930b2e8 | 362 | r = amdgpu_read_bios_from_rom(adev); |
363 | } | |
004e29cc | 364 | if (!r) { |
d38ceaf9 AD |
365 | r = amdgpu_read_disabled_bios(adev); |
366 | } | |
004e29cc | 367 | if (!r) { |
d38ceaf9 AD |
368 | r = amdgpu_read_platform_bios(adev); |
369 | } | |
004e29cc | 370 | if (!r || adev->bios == NULL) { |
d38ceaf9 AD |
371 | DRM_ERROR("Unable to locate a BIOS ROM\n"); |
372 | adev->bios = NULL; | |
373 | return false; | |
374 | } | |
f930b2e8 | 375 | if (!AMD_IS_VALID_VBIOS(adev->bios)) { |
d38ceaf9 AD |
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 | ||
379548f5 NW |
386 | bios_header_start = RBIOS16(0x48); |
387 | if (!bios_header_start) { | |
d38ceaf9 AD |
388 | goto free_bios; |
389 | } | |
379548f5 | 390 | tmp = bios_header_start + 4; |
d38ceaf9 AD |
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; | |
400 | free_bios: | |
401 | kfree(adev->bios); | |
402 | adev->bios = NULL; | |
403 | return false; | |
404 | } |