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 adev->bios = kmalloc(size, GFP_KERNEL); 111 if (!adev->bios) { 112 iounmap(bios); 113 return false; 114 } 115 adev->bios_size = size; 116 memcpy_fromio(adev->bios, bios, size); 117 iounmap(bios); 118 119 if (!check_atom_bios(adev->bios, size)) { 120 kfree(adev->bios); 121 return false; 122 } 123 124 return true; 125 } 126 127 bool amdgpu_read_bios(struct amdgpu_device *adev) 128 { 129 uint8_t __iomem *bios; 130 size_t size; 131 132 adev->bios = NULL; 133 /* XXX: some cards may return 0 for rom size? ddx has a workaround */ 134 bios = pci_map_rom(adev->pdev, &size); 135 if (!bios) 136 return false; 137 138 adev->bios = kzalloc(size, GFP_KERNEL); 139 if (adev->bios == NULL) { 140 pci_unmap_rom(adev->pdev, bios); 141 return false; 142 } 143 adev->bios_size = size; 144 memcpy_fromio(adev->bios, bios, size); 145 pci_unmap_rom(adev->pdev, bios); 146 147 if (!check_atom_bios(adev->bios, size)) { 148 kfree(adev->bios); 149 return false; 150 } 151 152 return true; 153 } 154 155 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev) 156 { 157 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0}; 158 int len; 159 160 if (!adev->asic_funcs || !adev->asic_funcs->read_bios_from_rom) 161 return false; 162 163 /* validate VBIOS signature */ 164 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false) 165 return false; 166 header[AMD_VBIOS_SIGNATURE_END] = 0; 167 168 if ((!AMD_IS_VALID_VBIOS(header)) || 169 memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET], 170 AMD_VBIOS_SIGNATURE, 171 strlen(AMD_VBIOS_SIGNATURE)) != 0) 172 return false; 173 174 /* valid vbios, go on */ 175 len = AMD_VBIOS_LENGTH(header); 176 len = ALIGN(len, 4); 177 adev->bios = kmalloc(len, GFP_KERNEL); 178 if (!adev->bios) { 179 DRM_ERROR("no memory to allocate for BIOS\n"); 180 return false; 181 } 182 adev->bios_size = len; 183 184 /* read complete BIOS */ 185 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len); 186 187 if (!check_atom_bios(adev->bios, len)) { 188 kfree(adev->bios); 189 return false; 190 } 191 192 return true; 193 } 194 195 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev) 196 { 197 phys_addr_t rom = adev->pdev->rom; 198 size_t romlen = adev->pdev->romlen; 199 void __iomem *bios; 200 201 adev->bios = NULL; 202 203 if (!rom || romlen == 0) 204 return false; 205 206 adev->bios = kzalloc(romlen, GFP_KERNEL); 207 if (!adev->bios) 208 return false; 209 210 bios = ioremap(rom, romlen); 211 if (!bios) 212 goto free_bios; 213 214 memcpy_fromio(adev->bios, bios, romlen); 215 iounmap(bios); 216 217 if (!check_atom_bios(adev->bios, romlen)) 218 goto free_bios; 219 220 adev->bios_size = romlen; 221 222 return true; 223 free_bios: 224 kfree(adev->bios); 225 return false; 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 */ 246 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios, 247 int offset, int len) 248 { 249 acpi_status status; 250 union acpi_object atrm_arg_elements[2], *obj; 251 struct acpi_object_list atrm_arg; 252 struct 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 = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer); 264 if (ACPI_FAILURE(status)) { 265 DRM_ERROR("failed to evaluate ATRM got %s\n", acpi_format_exception(status)); 266 return -ENODEV; 267 } 268 269 obj = (union acpi_object *)buffer.pointer; 270 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length); 271 len = obj->buffer.length; 272 kfree(buffer.pointer); 273 return len; 274 } 275 276 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) 277 { 278 int ret; 279 int size = 256 * 1024; 280 int i; 281 struct pci_dev *pdev = NULL; 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 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { 291 dhandle = ACPI_HANDLE(&pdev->dev); 292 if (!dhandle) 293 continue; 294 295 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); 296 if (ACPI_SUCCESS(status)) { 297 found = true; 298 break; 299 } 300 } 301 302 if (!found) { 303 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) { 304 dhandle = ACPI_HANDLE(&pdev->dev); 305 if (!dhandle) 306 continue; 307 308 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); 309 if (ACPI_SUCCESS(status)) { 310 found = true; 311 break; 312 } 313 } 314 } 315 316 if (!found) 317 return false; 318 pci_dev_put(pdev); 319 320 adev->bios = kmalloc(size, GFP_KERNEL); 321 if (!adev->bios) { 322 dev_err(adev->dev, "Unable to allocate bios\n"); 323 return false; 324 } 325 326 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) { 327 ret = amdgpu_atrm_call(atrm_handle, 328 adev->bios, 329 (i * ATRM_BIOS_PAGE), 330 ATRM_BIOS_PAGE); 331 if (ret < ATRM_BIOS_PAGE) 332 break; 333 } 334 335 if (!check_atom_bios(adev->bios, size)) { 336 kfree(adev->bios); 337 return false; 338 } 339 adev->bios_size = size; 340 return true; 341 } 342 #else 343 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) 344 { 345 return false; 346 } 347 #endif 348 349 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev) 350 { 351 if (adev->flags & AMD_IS_APU) 352 return igp_read_bios_from_vram(adev); 353 else 354 return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ? 355 false : amdgpu_asic_read_disabled_bios(adev); 356 } 357 358 #ifdef CONFIG_ACPI 359 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) 360 { 361 struct acpi_table_header *hdr; 362 acpi_size tbl_size; 363 UEFI_ACPI_VFCT *vfct; 364 unsigned int offset; 365 366 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr))) 367 return false; 368 tbl_size = hdr->length; 369 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) { 370 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #1),skipping\n"); 371 return false; 372 } 373 374 vfct = (UEFI_ACPI_VFCT *)hdr; 375 offset = vfct->VBIOSImageOffset; 376 377 while (offset < tbl_size) { 378 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset); 379 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader; 380 381 offset += sizeof(VFCT_IMAGE_HEADER); 382 if (offset > tbl_size) { 383 dev_info(adev->dev, "ACPI VFCT image header truncated,skipping\n"); 384 return false; 385 } 386 387 offset += vhdr->ImageLength; 388 if (offset > tbl_size) { 389 dev_info(adev->dev, "ACPI VFCT image truncated,skipping\n"); 390 return false; 391 } 392 393 if (vhdr->ImageLength && 394 vhdr->PCIBus == adev->pdev->bus->number && 395 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) && 396 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) && 397 vhdr->VendorID == adev->pdev->vendor && 398 vhdr->DeviceID == adev->pdev->device) { 399 adev->bios = kmemdup(&vbios->VbiosContent, 400 vhdr->ImageLength, 401 GFP_KERNEL); 402 403 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) { 404 kfree(adev->bios); 405 return false; 406 } 407 adev->bios_size = vhdr->ImageLength; 408 return true; 409 } 410 } 411 412 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #2),skipping\n"); 413 return false; 414 } 415 #else 416 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) 417 { 418 return false; 419 } 420 #endif 421 422 bool amdgpu_get_bios(struct amdgpu_device *adev) 423 { 424 if (amdgpu_atrm_get_bios(adev)) { 425 dev_info(adev->dev, "Fetched VBIOS from ATRM\n"); 426 goto success; 427 } 428 429 if (amdgpu_acpi_vfct_bios(adev)) { 430 dev_info(adev->dev, "Fetched VBIOS from VFCT\n"); 431 goto success; 432 } 433 434 if (igp_read_bios_from_vram(adev)) { 435 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n"); 436 goto success; 437 } 438 439 if (amdgpu_read_bios(adev)) { 440 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n"); 441 goto success; 442 } 443 444 if (amdgpu_read_bios_from_rom(adev)) { 445 dev_info(adev->dev, "Fetched VBIOS from ROM\n"); 446 goto success; 447 } 448 449 if (amdgpu_read_disabled_bios(adev)) { 450 dev_info(adev->dev, "Fetched VBIOS from disabled ROM BAR\n"); 451 goto success; 452 } 453 454 if (amdgpu_read_platform_bios(adev)) { 455 dev_info(adev->dev, "Fetched VBIOS from platform\n"); 456 goto success; 457 } 458 459 dev_err(adev->dev, "Unable to locate a BIOS ROM\n"); 460 return false; 461 462 success: 463 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false; 464 return true; 465 } 466 467 /* helper function for soc15 and onwards to read bios from rom */ 468 bool amdgpu_soc15_read_bios_from_rom(struct amdgpu_device *adev, 469 u8 *bios, u32 length_bytes) 470 { 471 u32 *dw_ptr; 472 u32 i, length_dw; 473 u32 rom_offset; 474 u32 rom_index_offset; 475 u32 rom_data_offset; 476 477 if (bios == NULL) 478 return false; 479 if (length_bytes == 0) 480 return false; 481 /* APU vbios image is part of sbios image */ 482 if (adev->flags & AMD_IS_APU) 483 return false; 484 if (!adev->smuio.funcs || 485 !adev->smuio.funcs->get_rom_index_offset || 486 !adev->smuio.funcs->get_rom_data_offset) 487 return false; 488 489 dw_ptr = (u32 *)bios; 490 length_dw = ALIGN(length_bytes, 4) / 4; 491 492 rom_index_offset = 493 adev->smuio.funcs->get_rom_index_offset(adev); 494 rom_data_offset = 495 adev->smuio.funcs->get_rom_data_offset(adev); 496 497 if (adev->nbio.funcs && 498 adev->nbio.funcs->get_rom_offset) { 499 rom_offset = adev->nbio.funcs->get_rom_offset(adev); 500 rom_offset = rom_offset << 17; 501 } else { 502 rom_offset = 0; 503 } 504 505 /* set rom index to rom_offset */ 506 WREG32(rom_index_offset, rom_offset); 507 /* read out the rom data */ 508 for (i = 0; i < length_dw; i++) 509 dw_ptr[i] = RREG32(rom_data_offset); 510 511 return true; 512 } 513