diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c')
-rw-r--r-- | kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c new file mode 100644 index 000000000..c44c0c6af --- /dev/null +++ b/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c @@ -0,0 +1,362 @@ +/* + * 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. + */ + +/* 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 || bios[0] != 0x55 || bios[1] != 0xaa) { + 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, val1, val2; + 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; + } + + val1 = readb(&bios[0]); + val2 = readb(&bios[1]); + + if (size == 0 || val1 != 0x55 || val2 != 0xaa) { + 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_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 || bios[0] != 0x55 || bios[1] != 0xaa) { + 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 || adev->bios[0] != 0x55 || adev->bios[1] != 0xaa) { + 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_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 (adev->bios[0] != 0x55 || adev->bios[1] != 0xaa) { + 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; +} |