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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 | ||
38 | /* If you boot an IGP board with a discrete card as the primary, | |
39 | * the IGP rom is not accessible via the rom bar as the IGP rom is | |
40 | * part of the system bios. On boot, the system bios puts a | |
41 | * copy of the igp rom at the start of vram if a discrete card is | |
42 | * present. | |
43 | */ | |
44 | static bool igp_read_bios_from_vram(struct amdgpu_device *adev) | |
45 | { | |
46 | uint8_t __iomem *bios; | |
47 | resource_size_t vram_base; | |
48 | resource_size_t size = 256 * 1024; /* ??? */ | |
49 | ||
2f7d10b3 | 50 | if (!(adev->flags & AMD_IS_APU)) |
d38ceaf9 AD |
51 | if (!amdgpu_card_posted(adev)) |
52 | return false; | |
53 | ||
54 | adev->bios = NULL; | |
55 | vram_base = pci_resource_start(adev->pdev, 0); | |
56 | bios = ioremap(vram_base, size); | |
57 | if (!bios) { | |
58 | return false; | |
59 | } | |
60 | ||
61 | if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) { | |
62 | iounmap(bios); | |
63 | return false; | |
64 | } | |
65 | adev->bios = kmalloc(size, GFP_KERNEL); | |
66 | if (adev->bios == NULL) { | |
67 | iounmap(bios); | |
68 | return false; | |
69 | } | |
70 | memcpy_fromio(adev->bios, bios, size); | |
71 | iounmap(bios); | |
72 | return true; | |
73 | } | |
74 | ||
75 | bool amdgpu_read_bios(struct amdgpu_device *adev) | |
76 | { | |
18da4340 | 77 | uint8_t __iomem *bios, val1, val2; |
d38ceaf9 AD |
78 | size_t size; |
79 | ||
80 | adev->bios = NULL; | |
81 | /* XXX: some cards may return 0 for rom size? ddx has a workaround */ | |
82 | bios = pci_map_rom(adev->pdev, &size); | |
83 | if (!bios) { | |
84 | return false; | |
85 | } | |
86 | ||
18da4340 AD |
87 | val1 = readb(&bios[0]); |
88 | val2 = readb(&bios[1]); | |
89 | ||
90 | if (size == 0 || val1 != 0x55 || val2 != 0xaa) { | |
d38ceaf9 AD |
91 | pci_unmap_rom(adev->pdev, bios); |
92 | return false; | |
93 | } | |
18da4340 | 94 | adev->bios = kzalloc(size, GFP_KERNEL); |
d38ceaf9 AD |
95 | if (adev->bios == NULL) { |
96 | pci_unmap_rom(adev->pdev, bios); | |
97 | return false; | |
98 | } | |
18da4340 | 99 | memcpy_fromio(adev->bios, bios, size); |
d38ceaf9 AD |
100 | pci_unmap_rom(adev->pdev, bios); |
101 | return true; | |
102 | } | |
103 | ||
104 | static bool amdgpu_read_platform_bios(struct amdgpu_device *adev) | |
105 | { | |
106 | uint8_t __iomem *bios; | |
107 | size_t size; | |
108 | ||
109 | adev->bios = NULL; | |
110 | ||
111 | bios = pci_platform_rom(adev->pdev, &size); | |
112 | if (!bios) { | |
113 | return false; | |
114 | } | |
115 | ||
116 | if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) { | |
117 | return false; | |
118 | } | |
119 | adev->bios = kmemdup(bios, size, GFP_KERNEL); | |
120 | if (adev->bios == NULL) { | |
121 | return false; | |
122 | } | |
123 | ||
124 | return true; | |
125 | } | |
126 | ||
127 | #ifdef CONFIG_ACPI | |
128 | /* ATRM is used to get the BIOS on the discrete cards in | |
129 | * dual-gpu systems. | |
130 | */ | |
131 | /* retrieve the ROM in 4k blocks */ | |
132 | #define ATRM_BIOS_PAGE 4096 | |
133 | /** | |
134 | * amdgpu_atrm_call - fetch a chunk of the vbios | |
135 | * | |
136 | * @atrm_handle: acpi ATRM handle | |
137 | * @bios: vbios image pointer | |
138 | * @offset: offset of vbios image data to fetch | |
139 | * @len: length of vbios image data to fetch | |
140 | * | |
141 | * Executes ATRM to fetch a chunk of the discrete | |
142 | * vbios image on PX systems (all asics). | |
143 | * Returns the length of the buffer fetched. | |
144 | */ | |
145 | static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios, | |
146 | int offset, int len) | |
147 | { | |
148 | acpi_status status; | |
149 | union acpi_object atrm_arg_elements[2], *obj; | |
150 | struct acpi_object_list atrm_arg; | |
151 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; | |
152 | ||
153 | atrm_arg.count = 2; | |
154 | atrm_arg.pointer = &atrm_arg_elements[0]; | |
155 | ||
156 | atrm_arg_elements[0].type = ACPI_TYPE_INTEGER; | |
157 | atrm_arg_elements[0].integer.value = offset; | |
158 | ||
159 | atrm_arg_elements[1].type = ACPI_TYPE_INTEGER; | |
160 | atrm_arg_elements[1].integer.value = len; | |
161 | ||
162 | status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer); | |
163 | if (ACPI_FAILURE(status)) { | |
164 | printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status)); | |
165 | return -ENODEV; | |
166 | } | |
167 | ||
168 | obj = (union acpi_object *)buffer.pointer; | |
169 | memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length); | |
170 | len = obj->buffer.length; | |
171 | kfree(buffer.pointer); | |
172 | return len; | |
173 | } | |
174 | ||
175 | static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) | |
176 | { | |
177 | int ret; | |
178 | int size = 256 * 1024; | |
179 | int i; | |
180 | struct pci_dev *pdev = NULL; | |
181 | acpi_handle dhandle, atrm_handle; | |
182 | acpi_status status; | |
183 | bool found = false; | |
184 | ||
185 | /* ATRM is for the discrete card only */ | |
2f7d10b3 | 186 | if (adev->flags & AMD_IS_APU) |
d38ceaf9 AD |
187 | return false; |
188 | ||
189 | while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { | |
190 | dhandle = ACPI_HANDLE(&pdev->dev); | |
191 | if (!dhandle) | |
192 | continue; | |
193 | ||
194 | status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); | |
195 | if (!ACPI_FAILURE(status)) { | |
196 | found = true; | |
197 | break; | |
198 | } | |
199 | } | |
200 | ||
201 | if (!found) { | |
202 | while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) { | |
203 | dhandle = ACPI_HANDLE(&pdev->dev); | |
204 | if (!dhandle) | |
205 | continue; | |
206 | ||
207 | status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); | |
208 | if (!ACPI_FAILURE(status)) { | |
209 | found = true; | |
210 | break; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | if (!found) | |
216 | return false; | |
217 | ||
218 | adev->bios = kmalloc(size, GFP_KERNEL); | |
219 | if (!adev->bios) { | |
220 | DRM_ERROR("Unable to allocate bios\n"); | |
221 | return false; | |
222 | } | |
223 | ||
224 | for (i = 0; i < size / ATRM_BIOS_PAGE; i++) { | |
225 | ret = amdgpu_atrm_call(atrm_handle, | |
226 | adev->bios, | |
227 | (i * ATRM_BIOS_PAGE), | |
228 | ATRM_BIOS_PAGE); | |
229 | if (ret < ATRM_BIOS_PAGE) | |
230 | break; | |
231 | } | |
232 | ||
233 | if (i == 0 || adev->bios[0] != 0x55 || adev->bios[1] != 0xaa) { | |
234 | kfree(adev->bios); | |
235 | return false; | |
236 | } | |
237 | return true; | |
238 | } | |
239 | #else | |
240 | static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) | |
241 | { | |
242 | return false; | |
243 | } | |
244 | #endif | |
245 | ||
246 | static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev) | |
247 | { | |
2f7d10b3 | 248 | if (adev->flags & AMD_IS_APU) |
d38ceaf9 AD |
249 | return igp_read_bios_from_vram(adev); |
250 | else | |
251 | return amdgpu_asic_read_disabled_bios(adev); | |
252 | } | |
253 | ||
254 | #ifdef CONFIG_ACPI | |
255 | static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) | |
256 | { | |
257 | bool ret = false; | |
258 | struct acpi_table_header *hdr; | |
259 | acpi_size tbl_size; | |
260 | UEFI_ACPI_VFCT *vfct; | |
261 | GOP_VBIOS_CONTENT *vbios; | |
262 | VFCT_IMAGE_HEADER *vhdr; | |
263 | ||
264 | if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr, &tbl_size))) | |
265 | return false; | |
266 | if (tbl_size < sizeof(UEFI_ACPI_VFCT)) { | |
267 | DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n"); | |
268 | goto out_unmap; | |
269 | } | |
270 | ||
271 | vfct = (UEFI_ACPI_VFCT *)hdr; | |
272 | if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) { | |
273 | DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n"); | |
274 | goto out_unmap; | |
275 | } | |
276 | ||
277 | vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset); | |
278 | vhdr = &vbios->VbiosHeader; | |
279 | DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n", | |
280 | vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction, | |
281 | vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength); | |
282 | ||
283 | if (vhdr->PCIBus != adev->pdev->bus->number || | |
284 | vhdr->PCIDevice != PCI_SLOT(adev->pdev->devfn) || | |
285 | vhdr->PCIFunction != PCI_FUNC(adev->pdev->devfn) || | |
286 | vhdr->VendorID != adev->pdev->vendor || | |
287 | vhdr->DeviceID != adev->pdev->device) { | |
288 | DRM_INFO("ACPI VFCT table is not for this card\n"); | |
289 | goto out_unmap; | |
290 | } | |
291 | ||
292 | if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) { | |
293 | DRM_ERROR("ACPI VFCT image truncated\n"); | |
294 | goto out_unmap; | |
295 | } | |
296 | ||
297 | adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL); | |
298 | ret = !!adev->bios; | |
299 | ||
300 | out_unmap: | |
301 | return ret; | |
302 | } | |
303 | #else | |
304 | static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) | |
305 | { | |
306 | return false; | |
307 | } | |
308 | #endif | |
309 | ||
310 | bool amdgpu_get_bios(struct amdgpu_device *adev) | |
311 | { | |
312 | bool r; | |
313 | uint16_t tmp; | |
314 | ||
315 | r = amdgpu_atrm_get_bios(adev); | |
316 | if (r == false) | |
317 | r = amdgpu_acpi_vfct_bios(adev); | |
318 | if (r == false) | |
319 | r = igp_read_bios_from_vram(adev); | |
320 | if (r == false) | |
321 | r = amdgpu_read_bios(adev); | |
322 | if (r == false) { | |
323 | r = amdgpu_read_disabled_bios(adev); | |
324 | } | |
325 | if (r == false) { | |
326 | r = amdgpu_read_platform_bios(adev); | |
327 | } | |
328 | if (r == false || adev->bios == NULL) { | |
329 | DRM_ERROR("Unable to locate a BIOS ROM\n"); | |
330 | adev->bios = NULL; | |
331 | return false; | |
332 | } | |
333 | if (adev->bios[0] != 0x55 || adev->bios[1] != 0xaa) { | |
334 | printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]); | |
335 | goto free_bios; | |
336 | } | |
337 | ||
338 | tmp = RBIOS16(0x18); | |
339 | if (RBIOS8(tmp + 0x14) != 0x0) { | |
340 | DRM_INFO("Not an x86 BIOS ROM, not using.\n"); | |
341 | goto free_bios; | |
342 | } | |
343 | ||
344 | adev->bios_header_start = RBIOS16(0x48); | |
345 | if (!adev->bios_header_start) { | |
346 | goto free_bios; | |
347 | } | |
348 | tmp = adev->bios_header_start + 4; | |
349 | if (!memcmp(adev->bios + tmp, "ATOM", 4) || | |
350 | !memcmp(adev->bios + tmp, "MOTA", 4)) { | |
351 | adev->is_atom_bios = true; | |
352 | } else { | |
353 | adev->is_atom_bios = false; | |
354 | } | |
355 | ||
356 | DRM_DEBUG("%sBIOS detected\n", adev->is_atom_bios ? "ATOM" : "COM"); | |
357 | return true; | |
358 | free_bios: | |
359 | kfree(adev->bios); | |
360 | adev->bios = NULL; | |
361 | return false; | |
362 | } |