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 */
check_atom_bios(uint8_t * bios,size_t size)48 static 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 */
igp_read_bios_from_vram(struct amdgpu_device * adev)89 static 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, M_DRM, 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
amdgpu_read_bios(struct amdgpu_device * adev)123 bool 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
amdgpu_read_bios_from_rom(struct amdgpu_device * adev)152 static 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, M_DRM, 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
amdgpu_read_platform_bios(struct amdgpu_device * adev)192 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
193 {
194 return false;
195 #if 0
196 phys_addr_t rom = adev->pdev->rom;
197 size_t romlen = adev->pdev->romlen;
198 void __iomem *bios;
199
200 adev->bios = NULL;
201
202 if (!rom || romlen == 0)
203 return false;
204
205 adev->bios = kzalloc(romlen, GFP_KERNEL);
206 if (!adev->bios)
207 return false;
208
209 bios = ioremap(rom, romlen);
210 if (!bios)
211 goto free_bios;
212
213 memcpy_fromio(adev->bios, bios, romlen);
214 iounmap(bios);
215
216 if (!check_atom_bios(adev->bios, romlen))
217 goto free_bios;
218
219 adev->bios_size = romlen;
220
221 return true;
222 free_bios:
223 kfree(adev->bios);
224 return false;
225 #endif
226 }
227
228 #ifdef CONFIG_ACPI
229 /* ATRM is used to get the BIOS on the discrete cards in
230 * dual-gpu systems.
231 */
232 /* retrieve the ROM in 4k blocks */
233 #define ATRM_BIOS_PAGE 4096
234 /**
235 * amdgpu_atrm_call - fetch a chunk of the vbios
236 *
237 * @atrm_handle: acpi ATRM handle
238 * @bios: vbios image pointer
239 * @offset: offset of vbios image data to fetch
240 * @len: length of vbios image data to fetch
241 *
242 * Executes ATRM to fetch a chunk of the discrete
243 * vbios image on PX systems (all asics).
244 * Returns the length of the buffer fetched.
245 */
amdgpu_atrm_call(ACPI_HANDLE atrm_handle,uint8_t * bios,int offset,int len)246 static int amdgpu_atrm_call(ACPI_HANDLE atrm_handle, uint8_t *bios,
247 int offset, int len)
248 {
249 ACPI_STATUS status;
250 ACPI_OBJECT atrm_arg_elements[2], *obj;
251 ACPI_OBJECT_LIST atrm_arg;
252 ACPI_BUFFER buffer = { ACPI_ALLOCATE_BUFFER, NULL};
253
254 atrm_arg.Count = 2;
255 atrm_arg.Pointer = &atrm_arg_elements[0];
256
257 atrm_arg_elements[0].Type = ACPI_TYPE_INTEGER;
258 atrm_arg_elements[0].Integer.Value = offset;
259
260 atrm_arg_elements[1].Type = ACPI_TYPE_INTEGER;
261 atrm_arg_elements[1].Integer.Value = len;
262
263 status = AcpiEvaluateObject(atrm_handle, NULL, &atrm_arg, &buffer);
264 if (ACPI_FAILURE(status)) {
265 printk("failed to evaluate ATRM got %s\n", AcpiFormatException(status));
266 return -ENODEV;
267 }
268
269 obj = (ACPI_OBJECT *)buffer.Pointer;
270 memcpy(bios+offset, obj->Buffer.Pointer, obj->Buffer.Length);
271 len = obj->Buffer.Length;
272 AcpiOsFree(buffer.Pointer);
273 return len;
274 }
275
amdgpu_atrm_get_bios(struct amdgpu_device * adev)276 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
277 {
278 int ret;
279 int size = 256 * 1024;
280 int i;
281 device_t dev;
282 ACPI_HANDLE dhandle, atrm_handle;
283 ACPI_STATUS status;
284 bool found = false;
285
286 /* ATRM is for the discrete card only */
287 if (adev->flags & AMD_IS_APU)
288 return false;
289
290 #if 0
291 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
292 #endif
293 if ((dev = pci_find_class(PCIC_DISPLAY, PCIS_DISPLAY_VGA)) != NULL) {
294 DRM_INFO("%s: pci_find_class() found: %d:%d:%d:%d, vendor=%04x, device=%04x\n",
295 __func__,
296 pci_get_domain(dev),
297 pci_get_bus(dev),
298 pci_get_slot(dev),
299 pci_get_function(dev),
300 pci_get_vendor(dev),
301 pci_get_device(dev));
302 DRM_INFO("%s: Get ACPI device handle\n", __func__);
303 dhandle = acpi_get_handle(dev);
304 if (!dhandle)
305 #ifndef __DragonFly__
306 continue;
307 #else
308 return false;
309 #endif
310
311 DRM_INFO("%s: Get ACPI handle for \"ATRM\"\n", __func__);
312 status = AcpiGetHandle(dhandle, "ATRM", &atrm_handle);
313 if (!ACPI_FAILURE(status)) {
314 found = true;
315 #if 0
316 break;
317 #endif
318 } else {
319 DRM_INFO("%s: Failed to get \"ATRM\" handle: %s\n",
320 __func__, AcpiFormatException(status));
321 }
322 }
323
324 #if 0
325 if (!found) {
326 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
327 dhandle = ACPI_HANDLE(&pdev->dev);
328 if (!dhandle)
329 continue;
330
331 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
332 if (!ACPI_FAILURE(status)) {
333 found = true;
334 break;
335 }
336 }
337 }
338 #endif
339
340 if (!found)
341 return false;
342
343 adev->bios = kmalloc(size, M_DRM, GFP_KERNEL);
344 if (!adev->bios) {
345 DRM_ERROR("Unable to allocate bios\n");
346 return false;
347 }
348
349 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
350 ret = amdgpu_atrm_call(atrm_handle,
351 adev->bios,
352 (i * ATRM_BIOS_PAGE),
353 ATRM_BIOS_PAGE);
354 if (ret < ATRM_BIOS_PAGE)
355 break;
356 }
357
358 if (!check_atom_bios(adev->bios, size)) {
359 kfree(adev->bios);
360 return false;
361 }
362 adev->bios_size = size;
363 return true;
364 }
365 #else
366 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
367 {
368 return false;
369 }
370 #endif
371
372 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
373 {
374 if (adev->flags & AMD_IS_APU)
375 return igp_read_bios_from_vram(adev);
376 else
377 return amdgpu_asic_read_disabled_bios(adev);
378 }
379
380 #ifdef CONFIG_ACPI
381 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
382 {
383 ACPI_TABLE_HEADER *hdr;
384 ACPI_SIZE tbl_size;
385 UEFI_ACPI_VFCT *vfct;
386 unsigned offset;
387 ACPI_STATUS status;
388
389 #ifndef __DragonFly__
390 if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr, &tbl_size)))
391 return false;
392 #else
393 status = AcpiGetTable("VFCT", 1, &hdr);
394 if (!ACPI_SUCCESS(status))
395 return false;
396 #endif
397 tbl_size = hdr->Length;
398 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
399 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
400 return false;
401 }
402
403 vfct = (UEFI_ACPI_VFCT *)hdr;
404 offset = vfct->VBIOSImageOffset;
405
406 while (offset < tbl_size) {
407 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
408 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
409
410 offset += sizeof(VFCT_IMAGE_HEADER);
411 if (offset > tbl_size) {
412 DRM_ERROR("ACPI VFCT image header truncated\n");
413 return false;
414 }
415
416 offset += vhdr->ImageLength;
417 if (offset > tbl_size) {
418 DRM_ERROR("ACPI VFCT image truncated\n");
419 return false;
420 }
421
422 if (vhdr->ImageLength &&
423 vhdr->PCIBus == adev->pdev->bus->number &&
424 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
425 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
426 vhdr->VendorID == adev->pdev->vendor &&
427 vhdr->DeviceID == adev->pdev->device) {
428 adev->bios = kmemdup(&vbios->VbiosContent,
429 vhdr->ImageLength,
430 GFP_KERNEL);
431
432 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
433 kfree(adev->bios);
434 return false;
435 }
436 adev->bios_size = vhdr->ImageLength;
437 return true;
438 }
439 }
440
441 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
442 return false;
443 }
444 #else
445 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
446 {
447 return false;
448 }
449 #endif
450
451 bool amdgpu_get_bios(struct amdgpu_device *adev)
452 {
453 if (amdgpu_atrm_get_bios(adev))
454 goto success;
455
456 if (amdgpu_acpi_vfct_bios(adev))
457 goto success;
458
459 if (igp_read_bios_from_vram(adev))
460 goto success;
461
462 if (amdgpu_read_bios(adev))
463 goto success;
464
465 if (amdgpu_read_bios_from_rom(adev))
466 goto success;
467
468 if (amdgpu_read_disabled_bios(adev))
469 goto success;
470
471 if (amdgpu_read_platform_bios(adev))
472 goto success;
473
474 DRM_ERROR("Unable to locate a BIOS ROM\n");
475 return false;
476
477 success:
478 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;
479 return true;
480 }
481