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))
101 vram_base = pci_resource_start(adev->pdev, 0);
102 bios = ioremap_wc(vram_base, size);
107 adev->bios = kmalloc(size, GFP_KERNEL);
112 adev->bios_size = size;
113 memcpy_fromio(adev->bios, bios, size);
116 if (!check_atom_bios(adev->bios, size)) {
124 bool amdgpu_read_bios(struct amdgpu_device *adev)
126 uint8_t __iomem *bios;
130 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
131 bios = pci_map_rom(adev->pdev, &size);
136 adev->bios = kzalloc(size, GFP_KERNEL);
137 if (adev->bios == NULL) {
138 pci_unmap_rom(adev->pdev, bios);
141 adev->bios_size = size;
142 memcpy_fromio(adev->bios, bios, size);
143 pci_unmap_rom(adev->pdev, bios);
145 if (!check_atom_bios(adev->bios, size)) {
153 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
155 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
158 if (!adev->asic_funcs || !adev->asic_funcs->read_bios_from_rom)
161 /* validate VBIOS signature */
162 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
164 header[AMD_VBIOS_SIGNATURE_END] = 0;
166 if ((!AMD_IS_VALID_VBIOS(header)) ||
167 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
169 strlen(AMD_VBIOS_SIGNATURE)))
172 /* valid vbios, go on */
173 len = AMD_VBIOS_LENGTH(header);
175 adev->bios = kmalloc(len, GFP_KERNEL);
177 DRM_ERROR("no memory to allocate for BIOS\n");
180 adev->bios_size = len;
182 /* read complete BIOS */
183 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
185 if (!check_atom_bios(adev->bios, len)) {
193 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
195 phys_addr_t rom = adev->pdev->rom;
196 size_t romlen = adev->pdev->romlen;
201 if (!rom || romlen == 0)
204 adev->bios = kzalloc(romlen, GFP_KERNEL);
208 bios = ioremap(rom, romlen);
212 memcpy_fromio(adev->bios, bios, romlen);
215 if (!check_atom_bios(adev->bios, romlen))
218 adev->bios_size = romlen;
227 /* ATRM is used to get the BIOS on the discrete cards in
230 /* retrieve the ROM in 4k blocks */
231 #define ATRM_BIOS_PAGE 4096
233 * amdgpu_atrm_call - fetch a chunk of the vbios
235 * @atrm_handle: acpi ATRM handle
236 * @bios: vbios image pointer
237 * @offset: offset of vbios image data to fetch
238 * @len: length of vbios image data to fetch
240 * Executes ATRM to fetch a chunk of the discrete
241 * vbios image on PX systems (all asics).
242 * Returns the length of the buffer fetched.
244 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
248 union acpi_object atrm_arg_elements[2], *obj;
249 struct acpi_object_list atrm_arg;
250 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
253 atrm_arg.pointer = &atrm_arg_elements[0];
255 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
256 atrm_arg_elements[0].integer.value = offset;
258 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
259 atrm_arg_elements[1].integer.value = len;
261 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
262 if (ACPI_FAILURE(status)) {
263 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
267 obj = (union acpi_object *)buffer.pointer;
268 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
269 len = obj->buffer.length;
270 kfree(buffer.pointer);
274 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
277 int size = 256 * 1024;
279 struct pci_dev *pdev = NULL;
280 acpi_handle dhandle, atrm_handle;
284 /* ATRM is for the discrete card only */
285 if (adev->flags & AMD_IS_APU)
288 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
289 dhandle = ACPI_HANDLE(&pdev->dev);
293 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
294 if (ACPI_SUCCESS(status)) {
301 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
302 dhandle = ACPI_HANDLE(&pdev->dev);
306 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
307 if (ACPI_SUCCESS(status)) {
317 adev->bios = kmalloc(size, GFP_KERNEL);
319 DRM_ERROR("Unable to allocate bios\n");
323 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
324 ret = amdgpu_atrm_call(atrm_handle,
326 (i * ATRM_BIOS_PAGE),
328 if (ret < ATRM_BIOS_PAGE)
332 if (!check_atom_bios(adev->bios, size)) {
336 adev->bios_size = size;
340 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
346 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
348 if (adev->flags & AMD_IS_APU)
349 return igp_read_bios_from_vram(adev);
351 return (!adev->asic_funcs || !adev->asic_funcs->read_disabled_bios) ?
352 false : amdgpu_asic_read_disabled_bios(adev);
356 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
358 struct acpi_table_header *hdr;
360 UEFI_ACPI_VFCT *vfct;
363 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
365 tbl_size = hdr->length;
366 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
367 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
371 vfct = (UEFI_ACPI_VFCT *)hdr;
372 offset = vfct->VBIOSImageOffset;
374 while (offset < tbl_size) {
375 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
376 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
378 offset += sizeof(VFCT_IMAGE_HEADER);
379 if (offset > tbl_size) {
380 DRM_ERROR("ACPI VFCT image header truncated\n");
384 offset += vhdr->ImageLength;
385 if (offset > tbl_size) {
386 DRM_ERROR("ACPI VFCT image truncated\n");
390 if (vhdr->ImageLength &&
391 vhdr->PCIBus == adev->pdev->bus->number &&
392 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
393 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
394 vhdr->VendorID == adev->pdev->vendor &&
395 vhdr->DeviceID == adev->pdev->device) {
396 adev->bios = kmemdup(&vbios->VbiosContent,
400 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
404 adev->bios_size = vhdr->ImageLength;
409 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
413 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
419 bool amdgpu_get_bios(struct amdgpu_device *adev)
421 if (amdgpu_atrm_get_bios(adev)) {
422 dev_info(adev->dev, "Fetched VBIOS from ATRM\n");
426 if (amdgpu_acpi_vfct_bios(adev)) {
427 dev_info(adev->dev, "Fetched VBIOS from VFCT\n");
431 if (igp_read_bios_from_vram(adev)) {
432 dev_info(adev->dev, "Fetched VBIOS from VRAM BAR\n");
436 if (amdgpu_read_bios(adev)) {
437 dev_info(adev->dev, "Fetched VBIOS from ROM BAR\n");
441 if (amdgpu_read_bios_from_rom(adev)) {
442 dev_info(adev->dev, "Fetched VBIOS from ROM\n");
446 if (amdgpu_read_disabled_bios(adev)) {
447 dev_info(adev->dev, "Fetched VBIOS from disabled ROM BAR\n");
451 if (amdgpu_read_platform_bios(adev)) {
452 dev_info(adev->dev, "Fetched VBIOS from platform\n");
456 DRM_ERROR("Unable to locate a BIOS ROM\n");
460 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;