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);
77 adev->bios_size = size;
78 memcpy_fromio(adev->bios, bios, size);
83 bool amdgpu_read_bios(struct amdgpu_device *adev)
85 uint8_t __iomem *bios, val[2];
89 /* XXX: some cards may return 0 for rom size? ddx has a workaround */
90 bios = pci_map_rom(adev->pdev, &size);
95 val[0] = readb(&bios[0]);
96 val[1] = readb(&bios[1]);
98 if (size == 0 || !AMD_IS_VALID_VBIOS(val)) {
99 pci_unmap_rom(adev->pdev, bios);
102 adev->bios = kzalloc(size, GFP_KERNEL);
103 if (adev->bios == NULL) {
104 pci_unmap_rom(adev->pdev, bios);
107 adev->bios_size = size;
108 memcpy_fromio(adev->bios, bios, size);
109 pci_unmap_rom(adev->pdev, bios);
113 static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev)
115 u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0};
118 if (!adev->asic_funcs->read_bios_from_rom)
121 /* validate VBIOS signature */
122 if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false)
124 header[AMD_VBIOS_SIGNATURE_END] = 0;
126 if ((!AMD_IS_VALID_VBIOS(header)) ||
127 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET],
129 strlen(AMD_VBIOS_SIGNATURE)))
132 /* valid vbios, go on */
133 len = AMD_VBIOS_LENGTH(header);
135 adev->bios = kmalloc(len, GFP_KERNEL);
137 DRM_ERROR("no memory to allocate for BIOS\n");
140 adev->bios_size = len;
142 /* read complete BIOS */
143 return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len);
146 static bool amdgpu_read_platform_bios(struct amdgpu_device *adev)
148 uint8_t __iomem *bios;
153 bios = pci_platform_rom(adev->pdev, &size);
158 if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) {
161 adev->bios = kmemdup(bios, size, GFP_KERNEL);
162 if (adev->bios == NULL) {
165 adev->bios_size = size;
171 /* ATRM is used to get the BIOS on the discrete cards in
174 /* retrieve the ROM in 4k blocks */
175 #define ATRM_BIOS_PAGE 4096
177 * amdgpu_atrm_call - fetch a chunk of the vbios
179 * @atrm_handle: acpi ATRM handle
180 * @bios: vbios image pointer
181 * @offset: offset of vbios image data to fetch
182 * @len: length of vbios image data to fetch
184 * Executes ATRM to fetch a chunk of the discrete
185 * vbios image on PX systems (all asics).
186 * Returns the length of the buffer fetched.
188 static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
192 union acpi_object atrm_arg_elements[2], *obj;
193 struct acpi_object_list atrm_arg;
194 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
197 atrm_arg.pointer = &atrm_arg_elements[0];
199 atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
200 atrm_arg_elements[0].integer.value = offset;
202 atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
203 atrm_arg_elements[1].integer.value = len;
205 status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
206 if (ACPI_FAILURE(status)) {
207 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
211 obj = (union acpi_object *)buffer.pointer;
212 memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
213 len = obj->buffer.length;
214 kfree(buffer.pointer);
218 static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
221 int size = 256 * 1024;
223 struct pci_dev *pdev = NULL;
224 acpi_handle dhandle, atrm_handle;
228 /* ATRM is for the discrete card only */
229 if (adev->flags & AMD_IS_APU)
232 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
233 dhandle = ACPI_HANDLE(&pdev->dev);
237 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
238 if (!ACPI_FAILURE(status)) {
245 while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
246 dhandle = ACPI_HANDLE(&pdev->dev);
250 status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
251 if (!ACPI_FAILURE(status)) {
261 adev->bios = kmalloc(size, GFP_KERNEL);
263 DRM_ERROR("Unable to allocate bios\n");
267 for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
268 ret = amdgpu_atrm_call(atrm_handle,
270 (i * ATRM_BIOS_PAGE),
272 if (ret < ATRM_BIOS_PAGE)
276 if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) {
280 adev->bios_size = size;
284 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev)
290 static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev)
292 if (adev->flags & AMD_IS_APU)
293 return igp_read_bios_from_vram(adev);
295 return amdgpu_asic_read_disabled_bios(adev);
299 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
302 struct acpi_table_header *hdr;
304 UEFI_ACPI_VFCT *vfct;
305 GOP_VBIOS_CONTENT *vbios;
306 VFCT_IMAGE_HEADER *vhdr;
308 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
310 tbl_size = hdr->length;
311 if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
312 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
316 vfct = (UEFI_ACPI_VFCT *)hdr;
317 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) {
318 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
322 vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset);
323 vhdr = &vbios->VbiosHeader;
324 DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",
325 vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction,
326 vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength);
328 if (vhdr->PCIBus != adev->pdev->bus->number ||
329 vhdr->PCIDevice != PCI_SLOT(adev->pdev->devfn) ||
330 vhdr->PCIFunction != PCI_FUNC(adev->pdev->devfn) ||
331 vhdr->VendorID != adev->pdev->vendor ||
332 vhdr->DeviceID != adev->pdev->device) {
333 DRM_INFO("ACPI VFCT table is not for this card\n");
337 if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {
338 DRM_ERROR("ACPI VFCT image truncated\n");
342 adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);
343 adev->bios_size = vhdr->ImageLength;
350 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
356 bool amdgpu_get_bios(struct amdgpu_device *adev)
359 uint16_t tmp, bios_header_start;
361 r = amdgpu_atrm_get_bios(adev);
363 r = amdgpu_acpi_vfct_bios(adev);
365 r = igp_read_bios_from_vram(adev);
367 r = amdgpu_read_bios(adev);
369 r = amdgpu_read_bios_from_rom(adev);
372 r = amdgpu_read_disabled_bios(adev);
375 r = amdgpu_read_platform_bios(adev);
377 if (!r || adev->bios == NULL) {
378 DRM_ERROR("Unable to locate a BIOS ROM\n");
382 if (!AMD_IS_VALID_VBIOS(adev->bios)) {
383 printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]);
388 if (RBIOS8(tmp + 0x14) != 0x0) {
389 DRM_INFO("Not an x86 BIOS ROM, not using.\n");
393 bios_header_start = RBIOS16(0x48);
394 if (!bios_header_start) {
397 tmp = bios_header_start + 4;
398 if (!memcmp(adev->bios + tmp, "ATOM", 4) ||
399 !memcmp(adev->bios + tmp, "MOTA", 4)) {
400 adev->is_atom_bios = true;
402 adev->is_atom_bios = false;
405 DRM_DEBUG("%sBIOS detected\n", adev->is_atom_bios ? "ATOM" : "COM");