On Thu, Aug 16, 2012 at 1:54 PM, <alexdeuc...@gmail.com> wrote:
> From: David L <equinox-freedesktopb...@diac24.net>
>
> This is required for pure UEFI systems. The vbios is stored
> in ACPI rather than at the legacy vga location.
>
> Fixes:
> https://bugs.freedesktop.org/show_bug.cgi?id=26891
>
> Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Reviewed-by: Jerome Glisse <jgli...@redhat.com>
> Cc: sta...@vger.kernel.org
> ---
> drivers/gpu/drm/radeon/radeon_bios.c | 59
> ++++++++++++++++++++++++++++++++++
> 1 files changed, 59 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_bios.c
> b/drivers/gpu/drm/radeon/radeon_bios.c
> index 501f488..f06494a7 100644
> --- a/drivers/gpu/drm/radeon/radeon_bios.c
> +++ b/drivers/gpu/drm/radeon/radeon_bios.c
> @@ -32,6 +32,9 @@
>
> #include <linux/vga_switcheroo.h>
> #include <linux/slab.h>
> +#ifdef CONFIG_ACPI
> +#include <linux/acpi.h>
> +#endif
> /*
> * BIOS.
> */
> @@ -476,6 +479,58 @@ static bool radeon_read_disabled_bios(struct
> radeon_device *rdev)
> return legacy_read_disabled_bios(rdev);
> }
>
> +#ifdef CONFIG_ACPI
> +static bool radeon_acpi_vfct_bios(struct radeon_device *rdev)
> +{
> + bool ret = false;
> + struct acpi_table_header *hdr;
> + /* acpi_get_table_with_size is not exported :( */
> + acpi_size tbl_size = 0x7fffffff;
> + UEFI_ACPI_VFCT *vfct;
> + GOP_VBIOS_CONTENT *vbios;
> + VFCT_IMAGE_HEADER *vhdr;
> +
> + if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
> + 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 != rdev->pdev->bus->number ||
> + vhdr->PCIDevice != PCI_SLOT(rdev->pdev->devfn) ||
> + vhdr->PCIFunction != PCI_FUNC(rdev->pdev->devfn) ||
> + vhdr->VendorID != rdev->pdev->vendor ||
> + vhdr->DeviceID != rdev->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;
> + }
> +
> + rdev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength,
> GFP_KERNEL);
> + ret = !!rdev->bios;
> +
> +out_unmap:
> + /* uh, no idea what to do here... */
> + return ret;
> +}
> +#endif
>
> bool radeon_get_bios(struct radeon_device *rdev)
> {
> @@ -487,6 +542,10 @@ bool radeon_get_bios(struct radeon_device *rdev)
> r = igp_read_bios_from_vram(rdev);
> if (r == false)
> r = radeon_read_bios(rdev);
> +#ifdef CONFIG_ACPI
> + if (r == false)
> + r = radeon_acpi_vfct_bios(rdev);
> +#endif
> if (r == false) {
> r = radeon_read_disabled_bios(rdev);
> }
> --
> 1.7.7.5
>
> _______________________________________________
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> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
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