drivers/gpu/drm/amd/amdgpu/amdgpu

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This source file includes following definitions.
check_atom_bios
igp_read_bios_from_vram
amdgpu_read_bios
amdgpu_read_bios_from_rom
amdgpu_read_platform_bios
amdgpu_atrm_call
amdgpu_atrm_get_bios
amdgpu_atrm_get_bios
amdgpu_read_disabled_bios
amdgpu_acpi_vfct_bios
amdgpu_acpi_vfct_bios
amdgpu_get_bios
   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         adev->bios = NULL;
 101         vram_base = pci_resource_start(adev->pdev, 0);
 102         bios = ioremap_wc(vram_base, size);
 103         if (!bios) {
 104                 return false;
 105         }
 106 
 107         adev->bios = kmalloc(size, GFP_KERNEL);
 108         if (!adev->bios) {
 109                 iounmap(bios);
 110                 return false;
 111         }
 112         adev->bios_size = size;
 113         memcpy_fromio(adev->bios, bios, size);
 114         iounmap(bios);
 115 
 116         if (!check_atom_bios(adev->bios, size)) {
 117                 kfree(adev->bios);
 118                 return false;
 119         }
 120 
 121         return true;
 122 }
 123 
 124 bool amdgpu_read_bios(struct amdgpu_device *adev)
 125 {
 126         uint8_t __iomem *bios;
 127         size_t size;
 128 
 129         adev->bios = NULL;
 130         /* XXX: some cards may return 0 for rom size? ddx has a workaround */
 131         bios = pci_map_rom(adev->pdev, &size);
 132         if (!bios) {
 133                 return false;
 134         }
 135 
 136         adev->bios = kzalloc(size, GFP_KERNEL);
 137         if (adev->bios == NULL) {
 138                 pci_unmap_rom(adev->pdev, bios);
 139                 return false;
 140         }
 141         adev->bios_size = size;
 142         memcpy_fromio(adev->bios, bios, size);
 143         pci_unmap_rom(adev->pdev, bios);
 144 
 145         if (!check_atom_bios(adev->bios, size)) {
 146                 kfree(adev->bios);
 147                 return false;
 148         }
 149 
 150         return true;
 151 }
 152 
 153 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
 154 {
 155         u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
 156         int len;
 157 
 158         if (!adev->asic_funcs->read_bios_from_rom)
 159                 return false;
 160 
 161         /* validate VBIOS signature */
 162         if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
 163                 return false;
 164         header[AMD_VBIOS_SIGNATURE_END] = 0;
 165 
 166         if ((!AMD_IS_VALID_VBIOS(header)) ||
 167             0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
 168                         AMD_VBIOS_SIGNATURE,
 169                         strlen(AMD_VBIOS_SIGNATURE)))
 170                 return false;
 171 
 172         /* valid vbios, go on */
 173         len = AMD_VBIOS_LENGTH(header);
 174         len = ALIGN(len, 4);
 175         adev->bios = kmalloc(len, GFP_KERNEL);
 176         if (!adev->bios) {
 177                 DRM_ERROR("no memory to allocate for BIOS\n");
 178                 return false;
 179         }
 180         adev->bios_size = len;
 181 
 182         /* read complete BIOS */
 183         amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
 184 
 185         if (!check_atom_bios(adev->bios, len)) {
 186                 kfree(adev->bios);
 187                 return false;
 188         }
 189 
 190         return true;
 191 }
 192 
 193 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
 194 {
 195         uint8_t __iomem *bios;
 196         size_t size;
 197 
 198         adev->bios = NULL;
 199 
 200         bios = pci_platform_rom(adev->pdev, &size);
 201         if (!bios) {
 202                 return false;
 203         }
 204 
 205         adev->bios = kzalloc(size, GFP_KERNEL);
 206         if (adev->bios == NULL)
 207                 return false;
 208 
 209         memcpy_fromio(adev->bios, bios, size);
 210 
 211         if (!check_atom_bios(adev->bios, size)) {
 212                 kfree(adev->bios);
 213                 return false;
 214         }
 215 
 216         adev->bios_size = size;
 217 
 218         return true;
 219 }
 220 
 221 #ifdef CONFIG_ACPI
 222 /* ATRM is used to get the BIOS on the discrete cards in
 223  * dual-gpu systems.
 224  */
 225 /* retrieve the ROM in 4k blocks */
 226 #define ATRM_BIOS_PAGE 4096
 227 /**
 228  * amdgpu_atrm_call - fetch a chunk of the vbios
 229  *
 230  * @atrm_handle: acpi ATRM handle
 231  * @bios: vbios image pointer
 232  * @offset: offset of vbios image data to fetch
 233  * @len: length of vbios image data to fetch
 234  *
 235  * Executes ATRM to fetch a chunk of the discrete
 236  * vbios image on PX systems (all asics).
 237  * Returns the length of the buffer fetched.
 238  */
 239 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
 240                             int offset, int len)
 241 {
 242         acpi_status status;
 243         union acpi_object atrm_arg_elements[2], *obj;
 244         struct acpi_object_list atrm_arg;
 245         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
 246 
 247         atrm_arg.count = 2;
 248         atrm_arg.pointer = &atrm_arg_elements[0];
 249 
 250         atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
 251         atrm_arg_elements[0].integer.value = offset;
 252 
 253         atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
 254         atrm_arg_elements[1].integer.value = len;
 255 
 256         status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
 257         if (ACPI_FAILURE(status)) {
 258                 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
 259                 return -ENODEV;
 260         }
 261 
 262         obj = (union acpi_object *)buffer.pointer;
 263         memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
 264         len = obj->buffer.length;
 265         kfree(buffer.pointer);
 266         return len;
 267 }
 268 
 269 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
 270 {
 271         int ret;
 272         int size = 256 * 1024;
 273         int i;
 274         struct pci_dev *pdev = NULL;
 275         acpi_handle dhandle, atrm_handle;
 276         acpi_status status;
 277         bool found = false;
 278 
 279         /* ATRM is for the discrete card only */
 280         if (adev->flags & AMD_IS_APU)
 281                 return false;
 282 
 283         while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
 284                 dhandle = ACPI_HANDLE(&pdev->dev);
 285                 if (!dhandle)
 286                         continue;
 287 
 288                 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
 289                 if (!ACPI_FAILURE(status)) {
 290                         found = true;
 291                         break;
 292                 }
 293         }
 294 
 295         if (!found) {
 296                 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
 297                         dhandle = ACPI_HANDLE(&pdev->dev);
 298                         if (!dhandle)
 299                                 continue;
 300 
 301                         status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
 302                         if (!ACPI_FAILURE(status)) {
 303                                 found = true;
 304                                 break;
 305                         }
 306                 }
 307         }
 308 
 309         if (!found)
 310                 return false;
 311 
 312         adev->bios = kmalloc(size, GFP_KERNEL);
 313         if (!adev->bios) {
 314                 DRM_ERROR("Unable to allocate bios\n");
 315                 return false;
 316         }
 317 
 318         for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
 319                 ret = amdgpu_atrm_call(atrm_handle,
 320                                        adev->bios,
 321                                        (i * ATRM_BIOS_PAGE),
 322                                        ATRM_BIOS_PAGE);
 323                 if (ret < ATRM_BIOS_PAGE)
 324                         break;
 325         }
 326 
 327         if (!check_atom_bios(adev->bios, size)) {
 328                 kfree(adev->bios);
 329                 return false;
 330         }
 331         adev->bios_size = size;
 332         return true;
 333 }
 334 #else
 335 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
 336 {
 337         return false;
 338 }
 339 #endif
 340 
 341 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
 342 {
 343         if (adev->flags & AMD_IS_APU)
 344                 return igp_read_bios_from_vram(adev);
 345         else
 346                 return amdgpu_asic_read_disabled_bios(adev);
 347 }
 348 
 349 #ifdef CONFIG_ACPI
 350 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
 351 {
 352         struct acpi_table_header *hdr;
 353         acpi_size tbl_size;
 354         UEFI_ACPI_VFCT *vfct;
 355         unsigned offset;
 356 
 357         if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
 358                 return false;
 359         tbl_size = hdr->length;
 360         if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
 361                 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
 362                 return false;
 363         }
 364 
 365         vfct = (UEFI_ACPI_VFCT *)hdr;
 366         offset = vfct->VBIOSImageOffset;
 367 
 368         while (offset < tbl_size) {
 369                 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
 370                 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
 371 
 372                 offset += sizeof(VFCT_IMAGE_HEADER);
 373                 if (offset > tbl_size) {
 374                         DRM_ERROR("ACPI VFCT image header truncated\n");
 375                         return false;
 376                 }
 377 
 378                 offset += vhdr->ImageLength;
 379                 if (offset > tbl_size) {
 380                         DRM_ERROR("ACPI VFCT image truncated\n");
 381                         return false;
 382                 }
 383 
 384                 if (vhdr->ImageLength &&
 385                     vhdr->PCIBus == adev->pdev->bus->number &&
 386                     vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
 387                     vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
 388                     vhdr->VendorID == adev->pdev->vendor &&
 389                     vhdr->DeviceID == adev->pdev->device) {
 390                         adev->bios = kmemdup(&vbios->VbiosContent,
 391                                              vhdr->ImageLength,
 392                                              GFP_KERNEL);
 393 
 394                         if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
 395                                 kfree(adev->bios);
 396                                 return false;
 397                         }
 398                         adev->bios_size = vhdr->ImageLength;
 399                         return true;
 400                 }
 401         }
 402 
 403         DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
 404         return false;
 405 }
 406 #else
 407 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
 408 {
 409         return false;
 410 }
 411 #endif
 412 
 413 bool amdgpu_get_bios(struct amdgpu_device *adev)
 414 {
 415         if (amdgpu_atrm_get_bios(adev))
 416                 goto success;
 417 
 418         if (amdgpu_acpi_vfct_bios(adev))
 419                 goto success;
 420 
 421         if (igp_read_bios_from_vram(adev))
 422                 goto success;
 423 
 424         if (amdgpu_read_bios(adev))
 425                 goto success;
 426 
 427         if (amdgpu_read_bios_from_rom(adev))
 428                 goto success;
 429 
 430         if (amdgpu_read_disabled_bios(adev))
 431                 goto success;
 432 
 433         if (amdgpu_read_platform_bios(adev))
 434                 goto success;
 435 
 436         DRM_ERROR("Unable to locate a BIOS ROM\n");
 437         return false;
 438 
 439 success:
 440         adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;
 441         return true;
 442 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c

DEFINITIONS
