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/slab.h>
33 #include <linux/acpi.h>
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)
45 /* Check if current bios is an ATOM BIOS.
46 * Return true if it is ATOM BIOS. Otherwise, return false.
48 static bool check_atom_bios(uint8_t *bios, size_t size)
50 uint16_t tmp, bios_header_start;
52 if (!bios || size < 0x49) {
53 DRM_INFO("vbios mem is null or mem size is wrong\n");
57 if (!AMD_IS_VALID_VBIOS(bios)) {
58 DRM_INFO("BIOS signature incorrect %x %x\n", bios[0], bios[1]);
62 tmp = bios[0x18] | (bios[0x19] << 8);
63 if (bios[tmp + 0x14] != 0x0) {
64 DRM_INFO("Not an x86 BIOS ROM\n");
68 bios_header_start = bios[0x48] | (bios[0x49] << 8);
69 if (!bios_header_start) {
70 DRM_INFO("Can't locate bios header\n");
74 tmp = bios_header_start + 4;
76 DRM_INFO("BIOS header is broken\n");
80 if (!memcmp(bios + tmp, "ATOM", 4) ||
81 !memcmp(bios + tmp, "MOTA", 4)) {
82 DRM_DEBUG("ATOMBIOS detected\n");
89 /* If you boot an IGP board with a discrete card as the primary,
90 * the IGP rom is not accessible via the rom bar as the IGP rom is
91 * part of the system bios. On boot, the system bios puts a
92 * copy of the igp rom at the start of vram if a discrete card is
95 static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
97 uint8_t __iomem *bios;
98 resource_size_t vram_base;
99 resource_size_t size = 256 * 1024; /* ??? */
101 if (!(adev->flags & AMD_IS_APU))
102 if (amdgpu_need_post(adev))
106 vram_base = pci_resource_start(adev->pdev, 0);
107 bios = ioremap_wc(vram_base, size);
112 adev->bios = kmalloc(size, GFP_KERNEL);
117 adev->bios_size = size;
118 memcpy_fromio(adev->bios, bios, size);
121 if (!check_atom_bios(adev->bios, size)) {
129 bool amdgpu_read_bios(struct amdgpu_device *adev)
131 uint8_t __iomem *bios;
135 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
136 bios = pci_map_rom(adev->pdev, &size);
141 adev->bios = kzalloc(size, GFP_KERNEL);
142 if (adev->bios == NULL) {
143 pci_unmap_rom(adev->pdev, bios);
146 adev->bios_size = size;
147 memcpy_fromio(adev->bios, bios, size);
148 pci_unmap_rom(adev->pdev, bios);
150 if (!check_atom_bios(adev->bios, size)) {
158 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
160 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
163 if (!adev->asic_funcs->read_bios_from_rom)
166 /* validate VBIOS signature */
167 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
169 header[AMD_VBIOS_SIGNATURE_END] = 0;
171 if ((!AMD_IS_VALID_VBIOS(header)) ||
172 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
174 strlen(AMD_VBIOS_SIGNATURE)))
177 /* valid vbios, go on */
178 len = AMD_VBIOS_LENGTH(header);
180 adev->bios = kmalloc(len, GFP_KERNEL);
182 DRM_ERROR("no memory to allocate for BIOS\n");
185 adev->bios_size = len;
187 /* read complete BIOS */
188 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
190 if (!check_atom_bios(adev->bios, len)) {
198 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
200 uint8_t __iomem *bios;
205 bios = pci_platform_rom(adev->pdev, &size);
210 adev->bios = kzalloc(size, GFP_KERNEL);
211 if (adev->bios == NULL)
214 memcpy_fromio(adev->bios, bios, size);
216 if (!check_atom_bios(adev->bios, size)) {
221 adev->bios_size = size;
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_FAILURE(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_FAILURE(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 amdgpu_asic_read_disabled_bios(adev);
355 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
357 struct acpi_table_header *hdr;
359 UEFI_ACPI_VFCT *vfct;
362 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
364 tbl_size = hdr->length;
365 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
366 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
370 vfct = (UEFI_ACPI_VFCT *)hdr;
371 offset = vfct->VBIOSImageOffset;
373 while (offset < tbl_size) {
374 GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
375 VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
377 offset += sizeof(VFCT_IMAGE_HEADER);
378 if (offset > tbl_size) {
379 DRM_ERROR("ACPI VFCT image header truncated\n");
383 offset += vhdr->ImageLength;
384 if (offset > tbl_size) {
385 DRM_ERROR("ACPI VFCT image truncated\n");
389 if (vhdr->ImageLength &&
390 vhdr->PCIBus == adev->pdev->bus->number &&
391 vhdr->PCIDevice == PCI_SLOT(adev->pdev->devfn) &&
392 vhdr->PCIFunction == PCI_FUNC(adev->pdev->devfn) &&
393 vhdr->VendorID == adev->pdev->vendor &&
394 vhdr->DeviceID == adev->pdev->device) {
395 adev->bios = kmemdup(&vbios->VbiosContent,
399 if (!check_atom_bios(adev->bios, vhdr->ImageLength)) {
403 adev->bios_size = vhdr->ImageLength;
408 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
412 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
418 bool amdgpu_get_bios(struct amdgpu_device *adev)
420 if (amdgpu_atrm_get_bios(adev))
423 if (amdgpu_acpi_vfct_bios(adev))
426 if (igp_read_bios_from_vram(adev))
429 if (amdgpu_read_bios(adev))
432 if (amdgpu_read_bios_from_rom(adev))
435 if (amdgpu_read_disabled_bios(adev))
438 if (amdgpu_read_platform_bios(adev))
441 DRM_ERROR("Unable to locate a BIOS ROM\n");
445 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;