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 #if defined(__amd64__) || defined(__i386__) 36 #include <dev/isa/isareg.h> 37 #include <dev/isa/isavar.h> 38 #endif 39 40 /* 41 * BIOS. 42 */ 43 44 #define AMD_VBIOS_SIGNATURE " 761295520" 45 #define AMD_VBIOS_SIGNATURE_OFFSET 0x30 46 #define AMD_VBIOS_SIGNATURE_SIZE sizeof(AMD_VBIOS_SIGNATURE) 47 #define AMD_VBIOS_SIGNATURE_END (AMD_VBIOS_SIGNATURE_OFFSET + AMD_VBIOS_SIGNATURE_SIZE) 48 #define AMD_IS_VALID_VBIOS(p) ((p)[0] == 0x55 && (p)[1] == 0xAA) 49 #define AMD_VBIOS_LENGTH(p) ((p)[2] << 9) 50 51 /* Check if current bios is an ATOM BIOS. 52 * Return true if it is ATOM BIOS. Otherwise, return false. 53 */ 54 static bool check_atom_bios(uint8_t *bios, size_t size) 55 { 56 uint16_t tmp, bios_header_start; 57 58 if (!bios || size < 0x49) { 59 DRM_INFO("vbios mem is null or mem size is wrong\n"); 60 return false; 61 } 62 63 if (!AMD_IS_VALID_VBIOS(bios)) { 64 DRM_INFO("BIOS signature incorrect %x %x\n", bios[0], bios[1]); 65 return false; 66 } 67 68 bios_header_start = bios[0x48] | (bios[0x49] << 8); 69 if (!bios_header_start) { 70 DRM_INFO("Can't locate bios header\n"); 71 return false; 72 } 73 74 tmp = bios_header_start + 4; 75 if (size < tmp) { 76 DRM_INFO("BIOS header is broken\n"); 77 return false; 78 } 79 80 if (!memcmp(bios + tmp, "ATOM", 4) || 81 !memcmp(bios + tmp, "MOTA", 4)) { 82 DRM_DEBUG("ATOMBIOS detected\n"); 83 return true; 84 } 85 86 return false; 87 } 88 89 /* If you boot an IGP board with a discrete card as the primary, 90 * the IGP rom is not accessible via the rom bar as the IGP rom is 91 * part of the system bios. On boot, the system bios puts a 92 * copy of the igp rom at the start of vram if a discrete card is 93 * present. 94 */ 95 #ifdef __linux__ 96 static bool igp_read_bios_from_vram(struct amdgpu_device *adev) 97 { 98 uint8_t __iomem *bios; 99 resource_size_t vram_base; 100 resource_size_t size = 256 * 1024; /* ??? */ 101 102 if (!(adev->flags & AMD_IS_APU)) 103 if (amdgpu_device_need_post(adev)) 104 return false; 105 106 adev->bios = NULL; 107 vram_base = pci_resource_start(adev->pdev, 0); 108 bios = ioremap_wc(vram_base, size); 109 if (!bios) { 110 return false; 111 } 112 113 adev->bios = kmalloc(size, GFP_KERNEL); 114 if (!adev->bios) { 115 iounmap(bios); 116 return false; 117 } 118 adev->bios_size = size; 119 memcpy_fromio(adev->bios, bios, size); 120 iounmap(bios); 121 122 if (!check_atom_bios(adev->bios, size)) { 123 kfree(adev->bios); 124 return false; 125 } 126 127 return true; 128 } 129 #else 130 static bool igp_read_bios_from_vram(struct amdgpu_device *adev) 131 { 132 uint8_t __iomem *bios; 133 resource_size_t size = 256 * 1024; /* ??? */ 134 bus_space_handle_t bsh; 135 bus_space_tag_t bst = adev->memt; 136 137 if (!(adev->flags & AMD_IS_APU)) 138 if (amdgpu_device_need_post(adev)) 139 return false; 140 141 adev->bios = NULL; 142 143 if (bus_space_map(bst, adev->fb_aper_offset, size, BUS_SPACE_MAP_LINEAR, &bsh) != 0) 144 return false; 145 146 bios = bus_space_vaddr(adev->memt, bsh); 147 if (bios == NULL) { 148 bus_space_unmap(bst, bsh, size); 149 return false; 150 } 151 152 adev->bios = kmalloc(size, GFP_KERNEL); 153 if (!adev->bios) { 154 bus_space_unmap(bst, bsh, size); 155 return false; 156 } 157 adev->bios_size = size; 158 memcpy_fromio(adev->bios, bios, size); 159 bus_space_unmap(bst, bsh, size); 160 161 if (!check_atom_bios(adev->bios, size)) { 162 kfree(adev->bios); 163 return false; 164 } 165 166 return true; 167 } 168 #endif 169 170 #ifdef __linux__ 171 bool amdgpu_read_bios(struct amdgpu_device *adev) 172 { 173 uint8_t __iomem *bios; 174 size_t size; 175 176 adev->bios = NULL; 177 /* XXX: some cards may return 0 for rom size? ddx has a workaround */ 178 bios = pci_map_rom(adev->pdev, &size); 179 if (!bios) { 180 return false; 181 } 182 183 adev->bios = kzalloc(size, GFP_KERNEL); 184 if (adev->bios == NULL) { 185 pci_unmap_rom(adev->pdev, bios); 186 return false; 187 } 188 adev->bios_size = size; 189 memcpy_fromio(adev->bios, bios, size); 190 pci_unmap_rom(adev->pdev, bios); 191 192 if (!check_atom_bios(adev->bios, size)) { 193 kfree(adev->bios); 194 return false; 195 } 196 197 return true; 198 } 199 #else 200 bool amdgpu_read_bios(struct amdgpu_device *adev) 201 { 202 uint8_t __iomem *bios; 203 size_t size; 204 pcireg_t address, mask; 205 bus_space_handle_t romh; 206 int rc; 207 208 adev->bios = NULL; 209 /* XXX: some cards may return 0 for rom size? ddx has a workaround */ 210 211 address = pci_conf_read(adev->pc, adev->pa_tag, PCI_ROM_REG); 212 pci_conf_write(adev->pc, adev->pa_tag, PCI_ROM_REG, ~PCI_ROM_ENABLE); 213 mask = pci_conf_read(adev->pc, adev->pa_tag, PCI_ROM_REG); 214 address |= PCI_ROM_ENABLE; 215 pci_conf_write(adev->pc, adev->pa_tag, PCI_ROM_REG, address); 216 217 size = PCI_ROM_SIZE(mask); 218 if (size == 0) 219 return false; 220 rc = bus_space_map(adev->memt, PCI_ROM_ADDR(address), size, 221 BUS_SPACE_MAP_LINEAR, &romh); 222 if (rc != 0) { 223 printf(": can't map PCI ROM (%d)\n", rc); 224 return false; 225 } 226 bios = (uint8_t *)bus_space_vaddr(adev->memt, romh); 227 if (!bios) { 228 printf(": bus_space_vaddr failed\n"); 229 return false; 230 } 231 232 adev->bios = kzalloc(size, GFP_KERNEL); 233 if (adev->bios == NULL) { 234 bus_space_unmap(adev->memt, romh, size); 235 return false; 236 } 237 adev->bios_size = size; 238 memcpy_fromio(adev->bios, bios, size); 239 bus_space_unmap(adev->memt, romh, size); 240 241 if (!check_atom_bios(adev->bios, size)) { 242 kfree(adev->bios); 243 return false; 244 } 245 246 return true; 247 } 248 #endif 249 250 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev) 251 { 252 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0}; 253 int len; 254 255 if (!adev->asic_funcs->read_bios_from_rom) 256 return false; 257 258 /* validate VBIOS signature */ 259 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false) 260 return false; 261 header[AMD_VBIOS_SIGNATURE_END] = 0; 262 263 if ((!AMD_IS_VALID_VBIOS(header)) || 264 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET], 265 AMD_VBIOS_SIGNATURE, 266 strlen(AMD_VBIOS_SIGNATURE))) 267 return false; 268 269 /* valid vbios, go on */ 270 len = AMD_VBIOS_LENGTH(header); 271 len = roundup2(len, 4); 272 adev->bios = kmalloc(len, GFP_KERNEL); 273 if (!adev->bios) { 274 DRM_ERROR("no memory to allocate for BIOS\n"); 275 return false; 276 } 277 adev->bios_size = len; 278 279 /* read complete BIOS */ 280 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len); 281 282 if (!check_atom_bios(adev->bios, len)) { 283 kfree(adev->bios); 284 return false; 285 } 286 287 return true; 288 } 289 290 #ifdef __linux__ 291 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev) 292 { 293 uint8_t __iomem *bios; 294 size_t size; 295 296 adev->bios = NULL; 297 298 bios = pci_platform_rom(adev->pdev, &size); 299 if (!bios) { 300 return false; 301 } 302 303 adev->bios = kzalloc(size, GFP_KERNEL); 304 if (adev->bios == NULL) 305 return false; 306 307 memcpy_fromio(adev->bios, bios, size); 308 309 if (!check_atom_bios(adev->bios, size)) { 310 kfree(adev->bios); 311 return false; 312 } 313 314 adev->bios_size = size; 315 316 return true; 317 } 318 #else 319 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev) 320 { 321 #if defined(__amd64__) || defined(__i386__) 322 uint8_t __iomem *bios; 323 bus_size_t size = 256 * 1024; /* ??? */ 324 325 adev->bios = NULL; 326 327 bios = (u8 *)ISA_HOLE_VADDR(0xc0000); 328 329 adev->bios = kzalloc(size, GFP_KERNEL); 330 if (adev->bios == NULL) 331 return false; 332 333 memcpy_fromio(adev->bios, bios, size); 334 335 if (!check_atom_bios(adev->bios, size)) { 336 kfree(adev->bios); 337 return false; 338 } 339 340 adev->bios_size = size; 341 342 return true; 343 #endif 344 return false; 345 } 346 #endif 347 348 #ifdef CONFIG_ACPI 349 /* ATRM is used to get the BIOS on the discrete cards in 350 * dual-gpu systems. 351 */ 352 /* retrieve the ROM in 4k blocks */ 353 #define ATRM_BIOS_PAGE 4096 354 /** 355 * amdgpu_atrm_call - fetch a chunk of the vbios 356 * 357 * @atrm_handle: acpi ATRM handle 358 * @bios: vbios image pointer 359 * @offset: offset of vbios image data to fetch 360 * @len: length of vbios image data to fetch 361 * 362 * Executes ATRM to fetch a chunk of the discrete 363 * vbios image on PX systems (all asics). 364 * Returns the length of the buffer fetched. 365 */ 366 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios, 367 int offset, int len) 368 { 369 acpi_status status; 370 union acpi_object atrm_arg_elements[2], *obj; 371 struct acpi_object_list atrm_arg; 372 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; 373 374 atrm_arg.count = 2; 375 atrm_arg.pointer = &atrm_arg_elements[0]; 376 377 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER; 378 atrm_arg_elements[0].integer.value = offset; 379 380 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER; 381 atrm_arg_elements[1].integer.value = len; 382 383 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer); 384 if (ACPI_FAILURE(status)) { 385 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status)); 386 return -ENODEV; 387 } 388 389 obj = (union acpi_object *)buffer.pointer; 390 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length); 391 len = obj->buffer.length; 392 kfree(buffer.pointer); 393 return len; 394 } 395 396 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) 397 { 398 int ret; 399 int size = 256 * 1024; 400 int i; 401 struct pci_dev *pdev = NULL; 402 acpi_handle dhandle, atrm_handle; 403 acpi_status status; 404 bool found = false; 405 406 /* ATRM is for the discrete card only */ 407 if (adev->flags & AMD_IS_APU) 408 return false; 409 410 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { 411 dhandle = ACPI_HANDLE(&pdev->dev); 412 if (!dhandle) 413 continue; 414 415 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); 416 if (!ACPI_FAILURE(status)) { 417 found = true; 418 break; 419 } 420 } 421 422 if (!found) { 423 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) { 424 dhandle = ACPI_HANDLE(&pdev->dev); 425 if (!dhandle) 426 continue; 427 428 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); 429 if (!ACPI_FAILURE(status)) { 430 found = true; 431 break; 432 } 433 } 434 } 435 436 if (!found) 437 return false; 438 439 adev->bios = kmalloc(size, GFP_KERNEL); 440 if (!adev->bios) { 441 DRM_ERROR("Unable to allocate bios\n"); 442 return false; 443 } 444 445 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) { 446 ret = amdgpu_atrm_call(atrm_handle, 447 adev->bios, 448 (i * ATRM_BIOS_PAGE), 449 ATRM_BIOS_PAGE); 450 if (ret < ATRM_BIOS_PAGE) 451 break; 452 } 453 454 if (!check_atom_bios(adev->bios, size)) { 455 kfree(adev->bios); 456 return false; 457 } 458 adev->bios_size = size; 459 return true; 460 } 461 #else 462 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) 463 { 464 return false; 465 } 466 #endif 467 468 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev) 469 { 470 if (adev->flags & AMD_IS_APU) 471 return igp_read_bios_from_vram(adev); 472 else 473 return amdgpu_asic_read_disabled_bios(adev); 474 } 475 476 #ifdef CONFIG_ACPI 477 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) 478 { 479 struct acpi_table_header *hdr; 480 acpi_size tbl_size; 481 UEFI_ACPI_VFCT *vfct; 482 unsigned offset; 483 484 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr))) 485 return false; 486 tbl_size = hdr->length; 487 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) { 488 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n"); 489 return false; 490 } 491 492 vfct = (UEFI_ACPI_VFCT *)hdr; 493 offset = vfct->VBIOSImageOffset; 494 495 while (offset < tbl_size) { 496 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset); 497 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader; 498 499 offset += sizeof(VFCT_IMAGE_HEADER); 500 if (offset > tbl_size) { 501 DRM_ERROR("ACPI VFCT image header truncated\n"); 502 return false; 503 } 504 505 offset += vhdr->ImageLength; 506 if (offset > tbl_size) { 507 DRM_ERROR("ACPI VFCT image truncated\n"); 508 return false; 509 } 510 511 if (vhdr->ImageLength && 512 vhdr->PCIBus == adev->pdev->bus->number && 513 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) && 514 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) && 515 vhdr->VendorID == adev->pdev->vendor && 516 vhdr->DeviceID == adev->pdev->device) { 517 adev->bios = kmemdup(&vbios->VbiosContent, 518 vhdr->ImageLength, 519 GFP_KERNEL); 520 521 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) { 522 kfree(adev->bios); 523 return false; 524 } 525 adev->bios_size = vhdr->ImageLength; 526 return true; 527 } 528 } 529 530 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n"); 531 return false; 532 } 533 #else 534 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) 535 { 536 return false; 537 } 538 #endif 539 540 bool amdgpu_get_bios(struct amdgpu_device *adev) 541 { 542 if (amdgpu_atrm_get_bios(adev)) 543 goto success; 544 545 if (amdgpu_acpi_vfct_bios(adev)) 546 goto success; 547 548 if (igp_read_bios_from_vram(adev)) 549 goto success; 550 551 if (amdgpu_read_bios(adev)) 552 goto success; 553 554 if (amdgpu_read_bios_from_rom(adev)) 555 goto success; 556 557 if (amdgpu_read_disabled_bios(adev)) 558 goto success; 559 560 if (amdgpu_read_platform_bios(adev)) 561 goto success; 562 563 DRM_ERROR("Unable to locate a BIOS ROM\n"); 564 return false; 565 566 success: 567 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false; 568 return true; 569 } 570