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 bios_header_start = bios[0x48] | (bios[0x49] << 8);
63 if (!bios_header_start) {
64 DRM_INFO("Can't locate bios header\n");
68 tmp = bios_header_start + 4;
70 DRM_INFO("BIOS header is broken\n");
74 if (!memcmp(bios + tmp, "ATOM", 4) ||
75 !memcmp(bios + tmp, "MOTA", 4)) {
76 DRM_DEBUG("ATOMBIOS detected\n");
83 /* If you boot an IGP board with a discrete card as the primary,
84 * the IGP rom is not accessible via the rom bar as the IGP rom is
85 * part of the system bios. On boot, the system bios puts a
86 * copy of the igp rom at the start of vram if a discrete card is
89 static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
91 uint8_t __iomem *bios;
92 resource_size_t vram_base;
93 resource_size_t size = 256 * 1024; /* ??? */
95 if (!(adev->flags & AMD_IS_APU))
96 if (amdgpu_device_need_post(adev))
100 vram_base = pci_resource_start(adev->pdev, 0);
101 bios = ioremap_wc(vram_base, size);
106 adev->bios = kmalloc(size, GFP_KERNEL);
111 adev->bios_size = size;
112 memcpy_fromio(adev->bios, bios, size);
115 if (!check_atom_bios(adev->bios, size)) {
123 bool amdgpu_read_bios(struct amdgpu_device *adev)
125 uint8_t __iomem *bios;
129 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
130 bios = pci_map_rom(adev->pdev, &size);
135 adev->bios = kzalloc(size, GFP_KERNEL);
136 if (adev->bios == NULL) {
137 pci_unmap_rom(adev->pdev, bios);
140 adev->bios_size = size;
141 memcpy_fromio(adev->bios, bios, size);
142 pci_unmap_rom(adev->pdev, bios);
144 if (!check_atom_bios(adev->bios, size)) {
152 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
154 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
157 if (!adev->asic_funcs->read_bios_from_rom)
160 /* validate VBIOS signature */
161 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
163 header[AMD_VBIOS_SIGNATURE_END] = 0;
165 if ((!AMD_IS_VALID_VBIOS(header)) ||
166 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
168 strlen(AMD_VBIOS_SIGNATURE)))
171 /* valid vbios, go on */
172 len = AMD_VBIOS_LENGTH(header);
174 adev->bios = kmalloc(len, GFP_KERNEL);
176 DRM_ERROR("no memory to allocate for BIOS\n");
179 adev->bios_size = len;
181 /* read complete BIOS */
182 amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
184 if (!check_atom_bios(adev->bios, len)) {
192 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
194 uint8_t __iomem *bios;
199 bios = pci_platform_rom(adev->pdev, &size);
204 adev->bios = kzalloc(size, GFP_KERNEL);
205 if (adev->bios == NULL)
208 memcpy_fromio(adev->bios, bios, size);
210 if (!check_atom_bios(adev->bios, size)) {
215 adev->bios_size = size;
221 /* ATRM is used to get the BIOS on the discrete cards in
224 /* retrieve the ROM in 4k blocks */
225 #define ATRM_BIOS_PAGE 4096
227 * amdgpu_atrm_call - fetch a chunk of the vbios
229 * @atrm_handle: acpi ATRM handle
230 * @bios: vbios image pointer
231 * @offset: offset of vbios image data to fetch
232 * @len: length of vbios image data to fetch
234 * Executes ATRM to fetch a chunk of the discrete
235 * vbios image on PX systems (all asics).
236 * Returns the length of the buffer fetched.
238 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
242 union acpi_object atrm_arg_elements[2], *obj;
243 struct acpi_object_list atrm_arg;
244 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
247 atrm_arg.pointer = &atrm_arg_elements[0];
249 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
250 atrm_arg_elements[0].integer.value = offset;
252 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
253 atrm_arg_elements[1].integer.value = len;
255 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
256 if (ACPI_FAILURE(status)) {
257 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
261 obj = (union acpi_object *)buffer.pointer;
262 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
263 len = obj->buffer.length;
264 kfree(buffer.pointer);
268 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
271 int size = 256 * 1024;
273 struct pci_dev *pdev = NULL;
274 acpi_handle dhandle, atrm_handle;
278 /* ATRM is for the discrete card only */
279 if (adev->flags & AMD_IS_APU)
282 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
283 dhandle = ACPI_HANDLE(&pdev->dev);
287 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
288 if (!ACPI_FAILURE(status)) {
295 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
296 dhandle = ACPI_HANDLE(&pdev->dev);
300 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
301 if (!ACPI_FAILURE(status)) {
311 adev->bios = kmalloc(size, GFP_KERNEL);
313 DRM_ERROR("Unable to allocate bios\n");
317 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
318 ret = amdgpu_atrm_call(atrm_handle,
320 (i * ATRM_BIOS_PAGE),
322 if (ret < ATRM_BIOS_PAGE)
326 if (!check_atom_bios(adev->bios, size)) {
330 adev->bios_size = size;
334 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
340 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
342 if (adev->flags & AMD_IS_APU)
343 return igp_read_bios_from_vram(adev);
345 return 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 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\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 DRM_ERROR("ACPI VFCT image header truncated\n");
377 offset += vhdr->ImageLength;
378 if (offset > tbl_size) {
379 DRM_ERROR("ACPI VFCT image truncated\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 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\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))
417 if (amdgpu_acpi_vfct_bios(adev))
420 if (igp_read_bios_from_vram(adev))
423 if (amdgpu_read_bios(adev))
426 if (amdgpu_read_bios_from_rom(adev))
429 if (amdgpu_read_disabled_bios(adev))
432 if (amdgpu_read_platform_bios(adev))
435 DRM_ERROR("Unable to locate a BIOS ROM\n");
439 adev->is_atom_fw = (adev->asic_type >= CHIP_VEGA10) ? true : false;