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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 a7 * copy of this software and associated documentation files (the "Software"),8 * to deal in the Software without restriction, including without limitation9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,10 * and/or sell copies of the Software, and to permit persons to whom the11 * Software is furnished to do so, subject to the following conditions:12 *13 * The above copyright notice and this permission notice shall be included in14 * all copies or substantial portions of the Software.15 *16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR20 * 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 OR22 * OTHER DEALINGS IN THE SOFTWARE.23 *24 * Authors: Dave Airlie25 * Alex Deucher26 * Jerome Glisse27 */28 29#include "amdgpu.h"30#include "atom.h"31 32#include <linux/device.h>33#include <linux/pci.h>34#include <linux/slab.h>35#include <linux/acpi.h>36/*37 * BIOS.38 */39 40#define AMD_VBIOS_SIGNATURE " 761295520"41#define AMD_VBIOS_SIGNATURE_OFFSET 0x3042#define AMD_VBIOS_SIGNATURE_SIZE sizeof(AMD_VBIOS_SIGNATURE)43#define AMD_VBIOS_SIGNATURE_END (AMD_VBIOS_SIGNATURE_OFFSET + AMD_VBIOS_SIGNATURE_SIZE)44#define AMD_IS_VALID_VBIOS(p) ((p)[0] == 0x55 && (p)[1] == 0xAA)45#define AMD_VBIOS_LENGTH(p) ((p)[2] << 9)46 47/* Check if current bios is an ATOM BIOS.48 * Return true if it is ATOM BIOS. Otherwise, return false.49 */50static bool check_atom_bios(uint8_t *bios, size_t size)51{52 uint16_t tmp, bios_header_start;53 54 if (!bios || size < 0x49) {55 DRM_INFO("vbios mem is null or mem size is wrong\n");56 return false;57 }58 59 if (!AMD_IS_VALID_VBIOS(bios)) {60 DRM_INFO("BIOS signature incorrect %x %x\n", bios[0], bios[1]);61 return false;62 }63 64 bios_header_start = bios[0x48] | (bios[0x49] << 8);65 if (!bios_header_start) {66 DRM_INFO("Can't locate bios header\n");67 return false;68 }69 70 tmp = bios_header_start + 4;71 if (size < tmp) {72 DRM_INFO("BIOS header is broken\n");73 return false;74 }75 76 if (!memcmp(bios + tmp, "ATOM", 4) ||77 !memcmp(bios + tmp, "MOTA", 4)) {78 DRM_DEBUG("ATOMBIOS detected\n");79 return true;80 }81 82 return false;83}84 85/* If you boot an IGP board with a discrete card as the primary,86 * the IGP rom is not accessible via the rom bar as the IGP rom is87 * part of the system bios. On boot, the system bios puts a88 * copy of the igp rom at the start of vram if a discrete card is89 * present.90 * For SR-IOV, the vbios image is also put in VRAM in the VF.91 */92static bool amdgpu_read_bios_from_vram(struct amdgpu_device *adev)93{94 uint8_t __iomem *bios;95 resource_size_t vram_base;96 resource_size_t size = 256 * 1024; /* ??? */97 98 if (!(adev->flags & AMD_IS_APU))99 if (amdgpu_device_need_post(adev))100 return false;101 102 /* FB BAR not enabled */103 if (pci_resource_len(adev->pdev, 0) == 0)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 adev->bios = kmalloc(size, GFP_KERNEL);113 if (!adev->bios) {114 iounmap(bios);115 return false;116 }117 adev->bios_size = size;118 memcpy_fromio(adev->bios, bios, size);119 iounmap(bios);120 121 if (!check_atom_bios(adev->bios, size)) {122 kfree(adev->bios);123 return false;124 }125 126 return true;127}128 129bool amdgpu_read_bios(struct amdgpu_device *adev)130{131 uint8_t __iomem *bios;132 size_t size;133 134 adev->bios = NULL;135 /* XXX: some cards may return 0 for rom size? ddx has a workaround */136 bios = pci_map_rom(adev->pdev, &size);137 if (!bios)138 return false;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 157static 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 memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],172 AMD_VBIOS_SIGNATURE,173 strlen(AMD_VBIOS_SIGNATURE)) != 0)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 197static 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;225free_bios:226 kfree(adev->bios);227 return false;228}229 230#ifdef CONFIG_ACPI231/* ATRM is used to get the BIOS on the discrete cards in232 * dual-gpu systems.233 */234/* retrieve the ROM in 4k blocks */235#define ATRM_BIOS_PAGE 4096236/**237 * amdgpu_atrm_call - fetch a chunk of the vbios238 *239 * @atrm_handle: acpi ATRM handle240 * @bios: vbios image pointer241 * @offset: offset of vbios image data to fetch242 * @len: length of vbios image data to fetch243 *244 * Executes ATRM to fetch a chunk of the discrete245 * vbios image on PX systems (all asics).246 * Returns the length of the buffer fetched.247 */248static 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 DRM_ERROR("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 278static 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 on-platform devices only */289 if (dev_is_removable(&adev->pdev->dev))290 return false;291 292 while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {293 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&294 (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))295 continue;296 297 dhandle = ACPI_HANDLE(&pdev->dev);298 if (!dhandle)299 continue;300 301 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);302 if (ACPI_SUCCESS(status)) {303 found = true;304 break;305 }306 }307 308 if (!found)309 return false;310 pci_dev_put(pdev);311 312 adev->bios = kmalloc(size, GFP_KERNEL);313 if (!adev->bios) {314 dev_err(adev->dev, "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#else335static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)336{337 return false;338}339#endif340 341static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)342{343 return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ?344 false : amdgpu_asic_read_disabled_bios(adev);345}346 347#ifdef CONFIG_ACPI348static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)349{350 struct acpi_table_header *hdr;351 acpi_size tbl_size;352 UEFI_ACPI_VFCT *vfct;353 unsigned int offset;354 355 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))356 return false;357 tbl_size = hdr->length;358 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {359 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #1),skipping\n");360 return false;361 }362 363 vfct = (UEFI_ACPI_VFCT *)hdr;364 offset = vfct->VBIOSImageOffset;365 366 while (offset < tbl_size) {367 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);368 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;369 370 offset += sizeof(VFCT_IMAGE_HEADER);371 if (offset > tbl_size) {372 dev_info(adev->dev, "ACPI VFCT image header truncated,skipping\n");373 return false;374 }375 376 offset += vhdr->ImageLength;377 if (offset > tbl_size) {378 dev_info(adev->dev, "ACPI VFCT image truncated,skipping\n");379 return false;380 }381 382 if (vhdr->ImageLength &&383 vhdr->PCIBus == adev->pdev->bus->number &&384 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&385 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&386 vhdr->VendorID == adev->pdev->vendor &&387 vhdr->DeviceID == adev->pdev->device) {388 adev->bios = kmemdup(&vbios->VbiosContent,389 vhdr->ImageLength,390 GFP_KERNEL);391 392 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {393 kfree(adev->bios);394 return false;395 }396 adev->bios_size = vhdr->ImageLength;397 return true;398 }399 }400 401 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #2),skipping\n");402 return false;403}404#else405static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)406{407 return false;408}409#endif410 411static bool amdgpu_get_bios_apu(struct amdgpu_device *adev)412{413 if (amdgpu_acpi_vfct_bios(adev)) {414 dev_info(adev->dev, "Fetched VBIOS from VFCT\n");415 goto success;416 }417 418 if (amdgpu_read_bios_from_vram(adev)) {419 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n");420 goto success;421 }422 423 if (amdgpu_read_bios(adev)) {424 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");425 goto success;426 }427 428 if (amdgpu_read_platform_bios(adev)) {429 dev_info(adev->dev, "Fetched VBIOS from platform\n");430 goto success;431 }432 433 dev_err(adev->dev, "Unable to locate a BIOS ROM\n");434 return false;435 436success:437 return true;438}439 440static bool amdgpu_get_bios_dgpu(struct amdgpu_device *adev)441{442 if (amdgpu_atrm_get_bios(adev)) {443 dev_info(adev->dev, "Fetched VBIOS from ATRM\n");444 goto success;445 }446 447 if (amdgpu_acpi_vfct_bios(adev)) {448 dev_info(adev->dev, "Fetched VBIOS from VFCT\n");449 goto success;450 }451 452 /* this is required for SR-IOV */453 if (amdgpu_read_bios_from_vram(adev)) {454 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n");455 goto success;456 }457 458 if (amdgpu_read_platform_bios(adev)) {459 dev_info(adev->dev, "Fetched VBIOS from platform\n");460 goto success;461 }462 463 if (amdgpu_read_bios(adev)) {464 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");465 goto success;466 }467 468 if (amdgpu_read_bios_from_rom(adev)) {469 dev_info(adev->dev, "Fetched VBIOS from ROM\n");470 goto success;471 }472 473 if (amdgpu_read_disabled_bios(adev)) {474 dev_info(adev->dev, "Fetched VBIOS from disabled ROM BAR\n");475 goto success;476 }477 478 dev_err(adev->dev, "Unable to locate a BIOS ROM\n");479 return false;480 481success:482 return true;483}484 485bool amdgpu_get_bios(struct amdgpu_device *adev)486{487 bool found;488 489 if (adev->flags & AMD_IS_APU)490 found = amdgpu_get_bios_apu(adev);491 else492 found = amdgpu_get_bios_dgpu(adev);493 494 if (found)495 adev->is_atom_fw = adev->asic_type >= CHIP_VEGA10;496 497 return found;498}499 500/* helper function for soc15 and onwards to read bios from rom */501bool amdgpu_soc15_read_bios_from_rom(struct amdgpu_device *adev,502 u8 *bios, u32 length_bytes)503{504 u32 *dw_ptr;505 u32 i, length_dw;506 u32 rom_offset;507 u32 rom_index_offset;508 u32 rom_data_offset;509 510 if (bios == NULL)511 return false;512 if (length_bytes == 0)513 return false;514 /* APU vbios image is part of sbios image */515 if (adev->flags & AMD_IS_APU)516 return false;517 if (!adev->smuio.funcs ||518 !adev->smuio.funcs->get_rom_index_offset ||519 !adev->smuio.funcs->get_rom_data_offset)520 return false;521 522 dw_ptr = (u32 *)bios;523 length_dw = ALIGN(length_bytes, 4) / 4;524 525 rom_index_offset =526 adev->smuio.funcs->get_rom_index_offset(adev);527 rom_data_offset =528 adev->smuio.funcs->get_rom_data_offset(adev);529 530 if (adev->nbio.funcs &&531 adev->nbio.funcs->get_rom_offset) {532 rom_offset = adev->nbio.funcs->get_rom_offset(adev);533 rom_offset = rom_offset << 17;534 } else {535 rom_offset = 0;536 }537 538 /* set rom index to rom_offset */539 WREG32(rom_index_offset, rom_offset);540 /* read out the rom data */541 for (i = 0; i < length_dw; i++)542 dw_ptr[i] = RREG32(rom_data_offset);543 544 return true;545}546