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 */ 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 */ 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 } 122 123 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 } 151 152 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 } 191 192 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 */ 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 } 275 276 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