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 */ 49 static 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 */ 90 static 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 } 127 128 bool 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 } 156 157 static 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 } 196 197 static 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; 225 free_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 */ 248 static 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 } 277 278 static 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; 320 321 adev->bios = kmalloc(size, GFP_KERNEL); 322 if (!adev->bios) { 323 dev_err(adev->dev, "Unable to allocate bios\n"); 324 return false; 325 } 326 327 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) { 328 ret = amdgpu_atrm_call(atrm_handle, 329 adev->bios, 330 (i * ATRM_BIOS_PAGE), 331 ATRM_BIOS_PAGE); 332 if (ret < ATRM_BIOS_PAGE) 333 break; 334 } 335 336 if (!check_atom_bios(adev->bios, size)) { 337 kfree(adev->bios); 338 return false; 339 } 340 adev->bios_size = size; 341 return true; 342 } 343 #else 344 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) 345 { 346 return false; 347 } 348 #endif 349 350 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev) 351 { 352 if (adev->flags & AMD_IS_APU) 353 return igp_read_bios_from_vram(adev); 354 else 355 return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ? 356 false : amdgpu_asic_read_disabled_bios(adev); 357 } 358 359 #ifdef CONFIG_ACPI 360 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) 361 { 362 struct acpi_table_header *hdr; 363 acpi_size tbl_size; 364 UEFI_ACPI_VFCT *vfct; 365 unsigned offset; 366 367 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr))) 368 return false; 369 tbl_size = hdr->length; 370 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) { 371 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #1),skipping\n"); 372 return false; 373 } 374 375 vfct = (UEFI_ACPI_VFCT *)hdr; 376 offset = vfct->VBIOSImageOffset; 377 378 while (offset < tbl_size) { 379 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset); 380 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader; 381 382 offset += sizeof(VFCT_IMAGE_HEADER); 383 if (offset > tbl_size) { 384 dev_info(adev->dev, "ACPI VFCT image header truncated,skipping\n"); 385 return false; 386 } 387 388 offset += vhdr->ImageLength; 389 if (offset > tbl_size) { 390 dev_info(adev->dev, "ACPI VFCT image truncated,skipping\n"); 391 return false; 392 } 393 394 if (vhdr->ImageLength && 395 vhdr->PCIBus == adev->pdev->bus->number && 396 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) && 397 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) && 398 vhdr->VendorID == adev->pdev->vendor && 399 vhdr->DeviceID == adev->pdev->device) { 400 adev->bios = kmemdup(&vbios->VbiosContent, 401 vhdr->ImageLength, 402 GFP_KERNEL); 403 404 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) { 405 kfree(adev->bios); 406 return false; 407 } 408 adev->bios_size = vhdr->ImageLength; 409 return true; 410 } 411 } 412 413 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #2),skipping\n"); 414 return false; 415 } 416 #else 417 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) 418 { 419 return false; 420 } 421 #endif 422 423 bool amdgpu_get_bios(struct amdgpu_device *adev) 424 { 425 if (amdgpu_atrm_get_bios(adev)) { 426 dev_info(adev->dev, "Fetched VBIOS from ATRM\n"); 427 goto success; 428 } 429 430 if (amdgpu_acpi_vfct_bios(adev)) { 431 dev_info(adev->dev, "Fetched VBIOS from VFCT\n"); 432 goto success; 433 } 434 435 if (igp_read_bios_from_vram(adev)) { 436 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n"); 437 goto success; 438 } 439 440 if (amdgpu_read_bios(adev)) { 441 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n"); 442 goto success; 443 } 444 445 if (amdgpu_read_bios_from_rom(adev)) { 446 dev_info(adev->dev, "Fetched VBIOS from ROM\n"); 447 goto success; 448 } 449 450 if (amdgpu_read_disabled_bios(adev)) { 451 dev_info(adev->dev, "Fetched VBIOS from disabled ROM BAR\n"); 452 goto success; 453 } 454 455 if (amdgpu_read_platform_bios(adev)) { 456 dev_info(adev->dev, "Fetched VBIOS from platform\n"); 457 goto success; 458 } 459 460 dev_err(adev->dev, "Unable to locate a BIOS ROM\n"); 461 return false; 462 463 success: 464 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false; 465 return true; 466 } 467 468 /* helper function for soc15 and onwards to read bios from rom */ 469 bool amdgpu_soc15_read_bios_from_rom(struct amdgpu_device *adev, 470 u8 *bios, u32 length_bytes) 471 { 472 u32 *dw_ptr; 473 u32 i, length_dw; 474 u32 rom_offset; 475 u32 rom_index_offset; 476 u32 rom_data_offset; 477 478 if (bios == NULL) 479 return false; 480 if (length_bytes == 0) 481 return false; 482 /* APU vbios image is part of sbios image */ 483 if (adev->flags & AMD_IS_APU) 484 return false; 485 if (!adev->smuio.funcs || 486 !adev->smuio.funcs->get_rom_index_offset || 487 !adev->smuio.funcs->get_rom_data_offset) 488 return false; 489 490 dw_ptr = (u32 *)bios; 491 length_dw = ALIGN(length_bytes, 4) / 4; 492 493 rom_index_offset = 494 adev->smuio.funcs->get_rom_index_offset(adev); 495 rom_data_offset = 496 adev->smuio.funcs->get_rom_data_offset(adev); 497 498 if (adev->nbio.funcs && 499 adev->nbio.funcs->get_rom_offset) { 500 rom_offset = adev->nbio.funcs->get_rom_offset(adev); 501 rom_offset = rom_offset << 17; 502 } else { 503 rom_offset = 0; 504 } 505 506 /* set rom index to rom_offset */ 507 WREG32(rom_index_offset, rom_offset); 508 /* read out the rom data */ 509 for (i = 0; i < length_dw; i++) 510 dw_ptr[i] = RREG32(rom_data_offset); 511 512 return true; 513 } 514