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
->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 uint8_t __iomem
*bios
;
200 bios
= pci_platform_rom(adev
->pdev
, &size
);
205 adev
->bios
= kzalloc(size
, GFP_KERNEL
);
206 if (adev
->bios
== NULL
)
209 memcpy_fromio(adev
->bios
, bios
, size
);
211 if (!check_atom_bios(adev
->bios
, size
)) {
216 adev
->bios_size
= size
;
222 /* ATRM is used to get the BIOS on the discrete cards in
225 /* retrieve the ROM in 4k blocks */
226 #define ATRM_BIOS_PAGE 4096
228 * amdgpu_atrm_call - fetch a chunk of the vbios
230 * @atrm_handle: acpi ATRM handle
231 * @bios: vbios image pointer
232 * @offset: offset of vbios image data to fetch
233 * @len: length of vbios image data to fetch
235 * Executes ATRM to fetch a chunk of the discrete
236 * vbios image on PX systems (all asics).
237 * Returns the length of the buffer fetched.
239 static int amdgpu_atrm_call(acpi_handle atrm_handle
, uint8_t *bios
,
243 union acpi_object atrm_arg_elements
[2], *obj
;
244 struct acpi_object_list atrm_arg
;
245 struct acpi_buffer buffer
= { ACPI_ALLOCATE_BUFFER
, NULL
};
248 atrm_arg
.pointer
= &atrm_arg_elements
[0];
250 atrm_arg_elements
[0].type
= ACPI_TYPE_INTEGER
;
251 atrm_arg_elements
[0].integer
.value
= offset
;
253 atrm_arg_elements
[1].type
= ACPI_TYPE_INTEGER
;
254 atrm_arg_elements
[1].integer
.value
= len
;
256 status
= acpi_evaluate_object(atrm_handle
, NULL
, &atrm_arg
, &buffer
);
257 if (ACPI_FAILURE(status
)) {
258 printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status
));
262 obj
= (union acpi_object
*)buffer
.pointer
;
263 memcpy(bios
+offset
, obj
->buffer
.pointer
, obj
->buffer
.length
);
264 len
= obj
->buffer
.length
;
265 kfree(buffer
.pointer
);
269 static bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
272 int size
= 256 * 1024;
274 struct pci_dev
*pdev
= NULL
;
275 acpi_handle dhandle
, atrm_handle
;
279 /* ATRM is for the discrete card only */
280 if (adev
->flags
& AMD_IS_APU
)
283 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_VGA
<< 8, pdev
)) != NULL
) {
284 dhandle
= ACPI_HANDLE(&pdev
->dev
);
288 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
289 if (!ACPI_FAILURE(status
)) {
296 while ((pdev
= pci_get_class(PCI_CLASS_DISPLAY_OTHER
<< 8, pdev
)) != NULL
) {
297 dhandle
= ACPI_HANDLE(&pdev
->dev
);
301 status
= acpi_get_handle(dhandle
, "ATRM", &atrm_handle
);
302 if (!ACPI_FAILURE(status
)) {
312 adev
->bios
= kmalloc(size
, GFP_KERNEL
);
314 DRM_ERROR("Unable to allocate bios\n");
318 for (i
= 0; i
< size
/ ATRM_BIOS_PAGE
; i
++) {
319 ret
= amdgpu_atrm_call(atrm_handle
,
321 (i
* ATRM_BIOS_PAGE
),
323 if (ret
< ATRM_BIOS_PAGE
)
327 if (!check_atom_bios(adev
->bios
, size
)) {
331 adev
->bios_size
= size
;
335 static inline bool amdgpu_atrm_get_bios(struct amdgpu_device
*adev
)
341 static bool amdgpu_read_disabled_bios(struct amdgpu_device
*adev
)
343 if (adev
->flags
& AMD_IS_APU
)
344 return igp_read_bios_from_vram(adev
);
346 return amdgpu_asic_read_disabled_bios(adev
);
350 static bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
352 struct acpi_table_header
*hdr
;
354 UEFI_ACPI_VFCT
*vfct
;
357 if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr
)))
359 tbl_size
= hdr
->length
;
360 if (tbl_size
< sizeof(UEFI_ACPI_VFCT
)) {
361 DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
365 vfct
= (UEFI_ACPI_VFCT
*)hdr
;
366 offset
= vfct
->VBIOSImageOffset
;
368 while (offset
< tbl_size
) {
369 GOP_VBIOS_CONTENT
*vbios
= (GOP_VBIOS_CONTENT
*)((char *)hdr
+ offset
);
370 VFCT_IMAGE_HEADER
*vhdr
= &vbios
->VbiosHeader
;
372 offset
+= sizeof(VFCT_IMAGE_HEADER
);
373 if (offset
> tbl_size
) {
374 DRM_ERROR("ACPI VFCT image header truncated\n");
378 offset
+= vhdr
->ImageLength
;
379 if (offset
> tbl_size
) {
380 DRM_ERROR("ACPI VFCT image truncated\n");
384 if (vhdr
->ImageLength
&&
385 vhdr
->PCIBus
== adev
->pdev
->bus
->number
&&
386 vhdr
->PCIDevice
== PCI_SLOT(adev
->pdev
->devfn
) &&
387 vhdr
->PCIFunction
== PCI_FUNC(adev
->pdev
->devfn
) &&
388 vhdr
->VendorID
== adev
->pdev
->vendor
&&
389 vhdr
->DeviceID
== adev
->pdev
->device
) {
390 adev
->bios
= kmemdup(&vbios
->VbiosContent
,
394 if (!check_atom_bios(adev
->bios
, vhdr
->ImageLength
)) {
398 adev
->bios_size
= vhdr
->ImageLength
;
403 DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
407 static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device
*adev
)
413 bool amdgpu_get_bios(struct amdgpu_device
*adev
)
415 if (amdgpu_atrm_get_bios(adev
))
418 if (amdgpu_acpi_vfct_bios(adev
))
421 if (igp_read_bios_from_vram(adev
))
424 if (amdgpu_read_bios(adev
))
427 if (amdgpu_read_bios_from_rom(adev
))
430 if (amdgpu_read_disabled_bios(adev
))
433 if (amdgpu_read_platform_bios(adev
))
436 DRM_ERROR("Unable to locate a BIOS ROM\n");
440 adev
->is_atom_fw
= (adev
->asic_type
>= CHIP_VEGA10
) ? true : false;