| /* |
| * Copyright 2008 Advanced Micro Devices, Inc. |
| * Copyright 2008 Red Hat Inc. |
| * Copyright 2009 Jerome Glisse. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Dave Airlie |
| * Alex Deucher |
| * Jerome Glisse |
| */ |
| #include <drm/drmP.h> |
| #include "amdgpu.h" |
| #include "atom.h" |
| |
| #include <linux/slab.h> |
| #include <linux/acpi.h> |
| /* |
| * BIOS. |
| */ |
| |
| #define AMD_VBIOS_SIGNATURE " 761295520" |
| #define AMD_VBIOS_SIGNATURE_OFFSET 0x30 |
| #define AMD_VBIOS_SIGNATURE_SIZE sizeof(AMD_VBIOS_SIGNATURE) |
| #define AMD_VBIOS_SIGNATURE_END (AMD_VBIOS_SIGNATURE_OFFSET + AMD_VBIOS_SIGNATURE_SIZE) |
| #define AMD_IS_VALID_VBIOS(p) ((p)[0] == 0x55 && (p)[1] == 0xAA) |
| #define AMD_VBIOS_LENGTH(p) ((p)[2] << 9) |
| |
| /* If you boot an IGP board with a discrete card as the primary, |
| * the IGP rom is not accessible via the rom bar as the IGP rom is |
| * part of the system bios. On boot, the system bios puts a |
| * copy of the igp rom at the start of vram if a discrete card is |
| * present. |
| */ |
| static bool igp_read_bios_from_vram(struct amdgpu_device *adev) |
| { |
| uint8_t __iomem *bios; |
| resource_size_t vram_base; |
| resource_size_t size = 256 * 1024; /* ??? */ |
| |
| if (!(adev->flags & AMD_IS_APU)) |
| if (!amdgpu_card_posted(adev)) |
| return false; |
| |
| adev->bios = NULL; |
| vram_base = pci_resource_start(adev->pdev, 0); |
| bios = ioremap(vram_base, size); |
| if (!bios) { |
| return false; |
| } |
| |
| if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) { |
| iounmap(bios); |
| return false; |
| } |
| adev->bios = kmalloc(size, GFP_KERNEL); |
| if (adev->bios == NULL) { |
| iounmap(bios); |
| return false; |
| } |
| memcpy_fromio(adev->bios, bios, size); |
| iounmap(bios); |
| return true; |
| } |
| |
| bool amdgpu_read_bios(struct amdgpu_device *adev) |
| { |
| uint8_t __iomem *bios, val[2]; |
| size_t size; |
| |
| adev->bios = NULL; |
| /* XXX: some cards may return 0 for rom size? ddx has a workaround */ |
| bios = pci_map_rom(adev->pdev, &size); |
| if (!bios) { |
| return false; |
| } |
| |
| val[0] = readb(&bios[0]); |
| val[1] = readb(&bios[1]); |
| |
| if (size == 0 || !AMD_IS_VALID_VBIOS(val)) { |
| pci_unmap_rom(adev->pdev, bios); |
| return false; |
| } |
| adev->bios = kzalloc(size, GFP_KERNEL); |
| if (adev->bios == NULL) { |
| pci_unmap_rom(adev->pdev, bios); |
| return false; |
| } |
| memcpy_fromio(adev->bios, bios, size); |
| pci_unmap_rom(adev->pdev, bios); |
| return true; |
| } |
| |
| static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev) |
| { |
| u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0}; |
| int len; |
| |
| if (!adev->asic_funcs->read_bios_from_rom) |
| return false; |
| |
| /* validate VBIOS signature */ |
| if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false) |
| return false; |
| header[AMD_VBIOS_SIGNATURE_END] = 0; |
| |
| if ((!AMD_IS_VALID_VBIOS(header)) || |
| 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET], |
| AMD_VBIOS_SIGNATURE, |
| strlen(AMD_VBIOS_SIGNATURE))) |
| return false; |
| |
| /* valid vbios, go on */ |
| len = AMD_VBIOS_LENGTH(header); |
| len = ALIGN(len, 4); |
| adev->bios = kmalloc(len, GFP_KERNEL); |
| if (!adev->bios) { |
| DRM_ERROR("no memory to allocate for BIOS\n"); |
| return false; |
| } |
| |
| /* read complete BIOS */ |
| return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len); |
| } |
| |
| static bool amdgpu_read_platform_bios(struct amdgpu_device *adev) |
| { |
| uint8_t __iomem *bios; |
| size_t size; |
| |
| adev->bios = NULL; |
| |
| bios = pci_platform_rom(adev->pdev, &size); |
| if (!bios) { |
| return false; |
| } |
| |
| if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) { |
| return false; |
| } |
| adev->bios = kmemdup(bios, size, GFP_KERNEL); |
| if (adev->bios == NULL) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| #ifdef CONFIG_ACPI |
| /* ATRM is used to get the BIOS on the discrete cards in |
| * dual-gpu systems. |
| */ |
| /* retrieve the ROM in 4k blocks */ |
| #define ATRM_BIOS_PAGE 4096 |
| /** |
| * amdgpu_atrm_call - fetch a chunk of the vbios |
| * |
| * @atrm_handle: acpi ATRM handle |
| * @bios: vbios image pointer |
| * @offset: offset of vbios image data to fetch |
| * @len: length of vbios image data to fetch |
| * |
| * Executes ATRM to fetch a chunk of the discrete |
| * vbios image on PX systems (all asics). |
| * Returns the length of the buffer fetched. |
| */ |
| static int amdgpu_atrm_call(acpi_handle atrm_handle, uint8_t *bios, |
| int offset, int len) |
| { |
| acpi_status status; |
| union acpi_object atrm_arg_elements[2], *obj; |
| struct acpi_object_list atrm_arg; |
| struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; |
| |
| atrm_arg.count = 2; |
| atrm_arg.pointer = &atrm_arg_elements[0]; |
| |
| atrm_arg_elements[0].type = ACPI_TYPE_INTEGER; |
| atrm_arg_elements[0].integer.value = offset; |
| |
| atrm_arg_elements[1].type = ACPI_TYPE_INTEGER; |
| atrm_arg_elements[1].integer.value = len; |
| |
| status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer); |
| if (ACPI_FAILURE(status)) { |
| printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status)); |
| return -ENODEV; |
| } |
| |
| obj = (union acpi_object *)buffer.pointer; |
| memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length); |
| len = obj->buffer.length; |
| kfree(buffer.pointer); |
| return len; |
| } |
| |
| static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) |
| { |
| int ret; |
| int size = 256 * 1024; |
| int i; |
| struct pci_dev *pdev = NULL; |
| acpi_handle dhandle, atrm_handle; |
| acpi_status status; |
| bool found = false; |
| |
| /* ATRM is for the discrete card only */ |
| if (adev->flags & AMD_IS_APU) |
| return false; |
| |
| while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { |
| dhandle = ACPI_HANDLE(&pdev->dev); |
| if (!dhandle) |
| continue; |
| |
| status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); |
| if (!ACPI_FAILURE(status)) { |
| found = true; |
| break; |
| } |
| } |
| |
| if (!found) { |
| while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) { |
| dhandle = ACPI_HANDLE(&pdev->dev); |
| if (!dhandle) |
| continue; |
| |
| status = acpi_get_handle(dhandle, "ATRM", &atrm_handle); |
| if (!ACPI_FAILURE(status)) { |
| found = true; |
| break; |
| } |
| } |
| } |
| |
| if (!found) |
| return false; |
| |
| adev->bios = kmalloc(size, GFP_KERNEL); |
| if (!adev->bios) { |
| DRM_ERROR("Unable to allocate bios\n"); |
| return false; |
| } |
| |
| for (i = 0; i < size / ATRM_BIOS_PAGE; i++) { |
| ret = amdgpu_atrm_call(atrm_handle, |
| adev->bios, |
| (i * ATRM_BIOS_PAGE), |
| ATRM_BIOS_PAGE); |
| if (ret < ATRM_BIOS_PAGE) |
| break; |
| } |
| |
| if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) { |
| kfree(adev->bios); |
| return false; |
| } |
| return true; |
| } |
| #else |
| static inline bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) |
| { |
| return false; |
| } |
| #endif |
| |
| static bool amdgpu_read_disabled_bios(struct amdgpu_device *adev) |
| { |
| if (adev->flags & AMD_IS_APU) |
| return igp_read_bios_from_vram(adev); |
| else |
| return amdgpu_asic_read_disabled_bios(adev); |
| } |
| |
| #ifdef CONFIG_ACPI |
| static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) |
| { |
| bool ret = false; |
| struct acpi_table_header *hdr; |
| acpi_size tbl_size; |
| UEFI_ACPI_VFCT *vfct; |
| GOP_VBIOS_CONTENT *vbios; |
| VFCT_IMAGE_HEADER *vhdr; |
| |
| if (!ACPI_SUCCESS(acpi_get_table_with_size("VFCT", 1, &hdr, &tbl_size))) |
| return false; |
| if (tbl_size < sizeof(UEFI_ACPI_VFCT)) { |
| DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n"); |
| goto out_unmap; |
| } |
| |
| vfct = (UEFI_ACPI_VFCT *)hdr; |
| if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) { |
| DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n"); |
| goto out_unmap; |
| } |
| |
| vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset); |
| vhdr = &vbios->VbiosHeader; |
| DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n", |
| vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction, |
| vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength); |
| |
| if (vhdr->PCIBus != adev->pdev->bus->number || |
| vhdr->PCIDevice != PCI_SLOT(adev->pdev->devfn) || |
| vhdr->PCIFunction != PCI_FUNC(adev->pdev->devfn) || |
| vhdr->VendorID != adev->pdev->vendor || |
| vhdr->DeviceID != adev->pdev->device) { |
| DRM_INFO("ACPI VFCT table is not for this card\n"); |
| goto out_unmap; |
| } |
| |
| if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) { |
| DRM_ERROR("ACPI VFCT image truncated\n"); |
| goto out_unmap; |
| } |
| |
| adev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL); |
| ret = !!adev->bios; |
| |
| out_unmap: |
| return ret; |
| } |
| #else |
| static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) |
| { |
| return false; |
| } |
| #endif |
| |
| bool amdgpu_get_bios(struct amdgpu_device *adev) |
| { |
| bool r; |
| uint16_t tmp; |
| |
| r = amdgpu_atrm_get_bios(adev); |
| if (r == false) |
| r = amdgpu_acpi_vfct_bios(adev); |
| if (r == false) |
| r = igp_read_bios_from_vram(adev); |
| if (r == false) |
| r = amdgpu_read_bios(adev); |
| if (r == false) { |
| r = amdgpu_read_bios_from_rom(adev); |
| } |
| if (r == false) { |
| r = amdgpu_read_disabled_bios(adev); |
| } |
| if (r == false) { |
| r = amdgpu_read_platform_bios(adev); |
| } |
| if (r == false || adev->bios == NULL) { |
| DRM_ERROR("Unable to locate a BIOS ROM\n"); |
| adev->bios = NULL; |
| return false; |
| } |
| if (!AMD_IS_VALID_VBIOS(adev->bios)) { |
| printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]); |
| goto free_bios; |
| } |
| |
| tmp = RBIOS16(0x18); |
| if (RBIOS8(tmp + 0x14) != 0x0) { |
| DRM_INFO("Not an x86 BIOS ROM, not using.\n"); |
| goto free_bios; |
| } |
| |
| adev->bios_header_start = RBIOS16(0x48); |
| if (!adev->bios_header_start) { |
| goto free_bios; |
| } |
| tmp = adev->bios_header_start + 4; |
| if (!memcmp(adev->bios + tmp, "ATOM", 4) || |
| !memcmp(adev->bios + tmp, "MOTA", 4)) { |
| adev->is_atom_bios = true; |
| } else { |
| adev->is_atom_bios = false; |
| } |
| |
| DRM_DEBUG("%sBIOS detected\n", adev->is_atom_bios ? "ATOM" : "COM"); |
| return true; |
| free_bios: |
| kfree(adev->bios); |
| adev->bios = NULL; |
| return false; |
| } |