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 /* If you boot an IGP board with a discrete card as the primary,
46 * the IGP rom is not accessible via the rom bar as the IGP rom is
47 * part of the system bios. On boot, the system bios puts a
48 * copy of the igp rom at the start of vram if a discrete card is
51 static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
53 uint8_t __iomem *bios;
54 resource_size_t vram_base;
55 resource_size_t size = 256 * 1024; /* ??? */
57 if (!(adev->flags & AMD_IS_APU))
58 if (!amdgpu_card_posted(adev))
62 vram_base = pci_resource_start(adev->pdev, 0);
63 bios = ioremap(vram_base, size);
68 if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
72 adev->bios = kmalloc(size, GFP_KERNEL);
73 if (adev->bios == NULL) {
77 memcpy_fromio(adev->bios, bios, size);
82 bool amdgpu_read_bios(struct amdgpu_device *adev)
84 uint8_t __iomem *bios, val[2];
88 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
89 bios = pci_map_rom(adev->pdev, &size);
94 val[0] = readb(&bios[0]);
95 val[1] = readb(&bios[1]);
97 if (size == 0 || !AMD_IS_VALID_VBIOS(val)) {
98 pci_unmap_rom(adev->pdev, bios);
101 adev->bios = kzalloc(size, GFP_KERNEL);
102 if (adev->bios == NULL) {
103 pci_unmap_rom(adev->pdev, bios);
106 memcpy_fromio(adev->bios, bios, size);
107 pci_unmap_rom(adev->pdev, bios);
111 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
113 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
116 if (!adev->asic_funcs->read_bios_from_rom)
119 /* validate VBIOS signature */
120 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
122 header[AMD_VBIOS_SIGNATURE_END] = 0;
124 if ((!AMD_IS_VALID_VBIOS(header)) ||
125 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
127 strlen(AMD_VBIOS_SIGNATURE)))
130 /* valid vbios, go on */
131 len = AMD_VBIOS_LENGTH(header);
133 adev->bios = kmalloc(len, GFP_KERNEL);
135 DRM_ERROR("no memory to allocate for BIOS\n");
139 /* read complete BIOS */
140 return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
143 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
145 uint8_t __iomem *bios;
150 bios = pci_platform_rom(adev->pdev, &size);
155 if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
158 adev->bios = kmemdup(bios, size, GFP_KERNEL);
159 if (adev->bios == NULL) {
167 /* ATRM is used to get the BIOS on the discrete cards in
170 /* retrieve the ROM in 4k blocks */
171 #define ATRM_BIOS_PAGE 4096
173 * amdgpu_atrm_call - fetch a chunk of the vbios
175 * @atrm_handle: acpi ATRM handle
176 * @bios: vbios image pointer
177 * @offset: offset of vbios image data to fetch
178 * @len: length of vbios image data to fetch
180 * Executes ATRM to fetch a chunk of the discrete
181 * vbios image on PX systems (all asics).
182 * Returns the length of the buffer fetched.
184 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
188 union acpi_object atrm_arg_elements[2], *obj;
189 struct acpi_object_list atrm_arg;
190 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
193 atrm_arg.pointer = &atrm_arg_elements[0];
195 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
196 atrm_arg_elements[0].integer.value = offset;
198 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
199 atrm_arg_elements[1].integer.value = len;
201 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
202 if (ACPI_FAILURE(status)) {
203 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
207 obj = (union acpi_object *)buffer.pointer;
208 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
209 len = obj->buffer.length;
210 kfree(buffer.pointer);
214 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
217 int size = 256 * 1024;
219 struct pci_dev *pdev = NULL;
220 acpi_handle dhandle, atrm_handle;
224 /* ATRM is for the discrete card only */
225 if (adev->flags & AMD_IS_APU)
228 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
229 dhandle = ACPI_HANDLE(&pdev->dev);
233 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
234 if (!ACPI_FAILURE(status)) {
241 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
242 dhandle = ACPI_HANDLE(&pdev->dev);
246 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
247 if (!ACPI_FAILURE(status)) {
257 adev->bios = kmalloc(size, GFP_KERNEL);
259 DRM_ERROR("Unable to allocate bios\n");
263 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
264 ret = amdgpu_atrm_call(atrm_handle,
266 (i * ATRM_BIOS_PAGE),
268 if (ret < ATRM_BIOS_PAGE)
272 if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) {
279 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
285 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
287 if (adev->flags & AMD_IS_APU)
288 return igp_read_bios_from_vram(adev);
290 return amdgpu_asic_read_disabled_bios(adev);
294 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
297 struct acpi_table_header *hdr;
299 UEFI_ACPI_VFCT *vfct;
300 GOP_VBIOS_CONTENT *vbios;
301 VFCT_IMAGE_HEADER *vhdr;
303 if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr, &tbl_size)))
305 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
306 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
310 vfct = (UEFI_ACPI_VFCT *)hdr;
311 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) {
312 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
316 vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset);
317 vhdr = &vbios->VbiosHeader;
318 DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",
319 vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction,
320 vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength);
322 if (vhdr->PCIBus != adev->pdev->bus->number ||
323 vhdr->PCIDevice != PCI_SLOT(adev->pdev->devfn) ||
324 vhdr->PCIFunction != PCI_FUNC(adev->pdev->devfn) ||
325 vhdr->VendorID != adev->pdev->vendor ||
326 vhdr->DeviceID != adev->pdev->device) {
327 DRM_INFO("ACPI VFCT table is not for this card\n");
331 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {
332 DRM_ERROR("ACPI VFCT image truncated\n");
336 adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);
343 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
349 bool amdgpu_get_bios(struct amdgpu_device *adev)
354 r = amdgpu_atrm_get_bios(adev);
356 r = amdgpu_acpi_vfct_bios(adev);
358 r = igp_read_bios_from_vram(adev);
360 r = amdgpu_read_bios(adev);
362 r = amdgpu_read_bios_from_rom(adev);
365 r = amdgpu_read_disabled_bios(adev);
368 r = amdgpu_read_platform_bios(adev);
370 if (r == false || adev->bios == NULL) {
371 DRM_ERROR("Unable to locate a BIOS ROM\n");
375 if (!AMD_IS_VALID_VBIOS(adev->bios)) {
376 printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]);
381 if (RBIOS8(tmp + 0x14) != 0x0) {
382 DRM_INFO("Not an x86 BIOS ROM, not using.\n");
386 adev->bios_header_start = RBIOS16(0x48);
387 if (!adev->bios_header_start) {
390 tmp = adev->bios_header_start + 4;
391 if (!memcmp(adev->bios + tmp, "ATOM", 4) ||
392 !memcmp(adev->bios + tmp, "MOTA", 4)) {
393 adev->is_atom_bios = true;
395 adev->is_atom_bios = false;
398 DRM_DEBUG("%sBIOS detected\n", adev->is_atom_bios ? "ATOM" : "COM");