2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 * Authors: Dave Airlie
32 #include <linux/pci.h>
33 #include <linux/slab.h>
34 #include <linux/acpi.h>
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)
46 /* Check if current bios is an ATOM BIOS.
47 * Return true if it is ATOM BIOS. Otherwise, return false.
49 static bool check_atom_bios(uint8_t *bios, size_t size)
51 uint16_t tmp, bios_header_start;
53 if (!bios || size < 0x49) {
54 DRM_INFO("vbios mem is null or mem size is wrong\n");
58 if (!AMD_IS_VALID_VBIOS(bios)) {
59 DRM_INFO("BIOS signature incorrect %x %x\n", bios[0], bios[1]);
63 bios_header_start = bios[0x48] | (bios[0x49] << 8);
64 if (!bios_header_start) {
65 DRM_INFO("Can't locate bios header\n");
69 tmp = bios_header_start + 4;
71 DRM_INFO("BIOS header is broken\n");
75 if (!memcmp(bios + tmp, "ATOM", 4) ||
76 !memcmp(bios + tmp, "MOTA", 4)) {
77 DRM_DEBUG("ATOMBIOS detected\n");
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
90 static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
92 uint8_t __iomem *bios;
93 resource_size_t vram_base;
94 resource_size_t size = 256 * 1024; /* ??? */
96 if (!(adev->flags & AMD_IS_APU))
97 if (amdgpu_device_need_post(adev))
100 /* FB BAR not enabled */
101 if (pci_resource_len(adev->pdev, 0) == 0)
105 vram_base = pci_resource_start(adev->pdev, 0);
106 bios = ioremap_wc(vram_base, size);
110 adev->bios = kmalloc(size, GFP_KERNEL);
115 adev->bios_size = size;
116 memcpy_fromio(adev->bios, bios, size);
119 if (!check_atom_bios(adev->bios, size)) {
127 bool amdgpu_read_bios(struct amdgpu_device *adev)
129 uint8_t __iomem *bios;
133 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
134 bios = pci_map_rom(adev->pdev, &size);
138 adev->bios = kzalloc(size, GFP_KERNEL);
139 if (adev->bios == NULL) {
140 pci_unmap_rom(adev->pdev, bios);
143 adev->bios_size = size;
144 memcpy_fromio(adev->bios, bios, size);
145 pci_unmap_rom(adev->pdev, bios);
147 if (!check_atom_bios(adev->bios, size)) {
155 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
157 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
160 if (!adev->asic_funcs || !adev->asic_funcs->read_bios_from_rom)
163 /* validate VBIOS signature */
164 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
166 header[AMD_VBIOS_SIGNATURE_END] = 0;
168 if ((!AMD_IS_VALID_VBIOS(header)) ||
169 memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
171 strlen(AMD_VBIOS_SIGNATURE)) != 0)
174 /* valid vbios, go on */
175 len = AMD_VBIOS_LENGTH(header);
177 adev->bios = kmalloc(len, GFP_KERNEL);
179 DRM_ERROR("no memory to allocate for BIOS\n");
182 adev->bios_size = len;
184 /* read complete BIOS */
185 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
187 if (!check_atom_bios(adev->bios, len)) {
195 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
197 phys_addr_t rom = adev->pdev->rom;
198 size_t romlen = adev->pdev->romlen;
203 if (!rom || romlen == 0)
206 adev->bios = kzalloc(romlen, GFP_KERNEL);
210 bios = ioremap(rom, romlen);
214 memcpy_fromio(adev->bios, bios, romlen);
217 if (!check_atom_bios(adev->bios, romlen))
220 adev->bios_size = romlen;
229 /* ATRM is used to get the BIOS on the discrete cards in
232 /* retrieve the ROM in 4k blocks */
233 #define ATRM_BIOS_PAGE 4096
235 * amdgpu_atrm_call - fetch a chunk of the vbios
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
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.
246 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
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};
255 atrm_arg.pointer = &atrm_arg_elements[0];
257 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
258 atrm_arg_elements[0].integer.value = offset;
260 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
261 atrm_arg_elements[1].integer.value = len;
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));
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);
276 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
279 int size = 256 * 1024;
281 struct pci_dev *pdev = NULL;
282 acpi_handle dhandle, atrm_handle;
286 /* ATRM is for the discrete card only */
287 if (adev->flags & AMD_IS_APU)
290 while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
291 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
292 (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
295 dhandle = ACPI_HANDLE(&pdev->dev);
299 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
300 if (ACPI_SUCCESS(status)) {
310 adev->bios = kmalloc(size, GFP_KERNEL);
312 dev_err(adev->dev, "Unable to allocate bios\n");
316 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
317 ret = amdgpu_atrm_call(atrm_handle,
319 (i * ATRM_BIOS_PAGE),
321 if (ret < ATRM_BIOS_PAGE)
325 if (!check_atom_bios(adev->bios, size)) {
329 adev->bios_size = size;
333 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
339 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
341 if (adev->flags & AMD_IS_APU)
342 return igp_read_bios_from_vram(adev);
344 return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ?
345 false : amdgpu_asic_read_disabled_bios(adev);
349 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
351 struct acpi_table_header *hdr;
353 UEFI_ACPI_VFCT *vfct;
356 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
358 tbl_size = hdr->length;
359 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
360 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #1),skipping\n");
364 vfct = (UEFI_ACPI_VFCT *)hdr;
365 offset = vfct->VBIOSImageOffset;
367 while (offset < tbl_size) {
368 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
369 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
371 offset += sizeof(VFCT_IMAGE_HEADER);
372 if (offset > tbl_size) {
373 dev_info(adev->dev, "ACPI VFCT image header truncated,skipping\n");
377 offset += vhdr->ImageLength;
378 if (offset > tbl_size) {
379 dev_info(adev->dev, "ACPI VFCT image truncated,skipping\n");
383 if (vhdr->ImageLength &&
384 vhdr->PCIBus == adev->pdev->bus->number &&
385 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
386 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
387 vhdr->VendorID == adev->pdev->vendor &&
388 vhdr->DeviceID == adev->pdev->device) {
389 adev->bios = kmemdup(&vbios->VbiosContent,
393 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
397 adev->bios_size = vhdr->ImageLength;
402 dev_info(adev->dev, "ACPI VFCT table present but broken (too short #2),skipping\n");
406 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
412 bool amdgpu_get_bios(struct amdgpu_device *adev)
414 if (amdgpu_atrm_get_bios(adev)) {
415 dev_info(adev->dev, "Fetched VBIOS from ATRM\n");
419 if (amdgpu_acpi_vfct_bios(adev)) {
420 dev_info(adev->dev, "Fetched VBIOS from VFCT\n");
424 if (igp_read_bios_from_vram(adev)) {
425 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n");
429 if (amdgpu_read_bios(adev)) {
430 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
434 if (amdgpu_read_bios_from_rom(adev)) {
435 dev_info(adev->dev, "Fetched VBIOS from ROM\n");
439 if (amdgpu_read_disabled_bios(adev)) {
440 dev_info(adev->dev, "Fetched VBIOS from disabled ROM BAR\n");
444 if (amdgpu_read_platform_bios(adev)) {
445 dev_info(adev->dev, "Fetched VBIOS from platform\n");
449 dev_err(adev->dev, "Unable to locate a BIOS ROM\n");
453 adev->is_atom_fw = adev->asic_type >= CHIP_VEGA10;
457 /* helper function for soc15 and onwards to read bios from rom */
458 bool amdgpu_soc15_read_bios_from_rom(struct amdgpu_device *adev,
459 u8 *bios, u32 length_bytes)
464 u32 rom_index_offset;
469 if (length_bytes == 0)
471 /* APU vbios image is part of sbios image */
472 if (adev->flags & AMD_IS_APU)
474 if (!adev->smuio.funcs ||
475 !adev->smuio.funcs->get_rom_index_offset ||
476 !adev->smuio.funcs->get_rom_data_offset)
479 dw_ptr = (u32 *)bios;
480 length_dw = ALIGN(length_bytes, 4) / 4;
483 adev->smuio.funcs->get_rom_index_offset(adev);
485 adev->smuio.funcs->get_rom_data_offset(adev);
487 if (adev->nbio.funcs &&
488 adev->nbio.funcs->get_rom_offset) {
489 rom_offset = adev->nbio.funcs->get_rom_offset(adev);
490 rom_offset = rom_offset << 17;
495 /* set rom index to rom_offset */
496 WREG32(rom_index_offset, rom_offset);
497 /* read out the rom data */
498 for (i = 0; i < length_dw; i++)
499 dw_ptr[i] = RREG32(rom_data_offset);