Commit a882f5de authored by Alex Deucher's avatar Alex Deucher

drm/radeon: handle vfct with multiple vbios images

The vfct table can contain multiple vbios images if the
platform contains multiple GPUs. Noticed by netkas on
phoronix forums.  This patch fixes those platforms.
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent 689957b1
......@@ -596,52 +596,58 @@ static bool radeon_read_disabled_bios(struct radeon_device *rdev)
#ifdef CONFIG_ACPI
static bool radeon_acpi_vfct_bios(struct radeon_device *rdev)
{
bool ret = false;
struct acpi_table_header *hdr;
acpi_size tbl_size;
UEFI_ACPI_VFCT *vfct;
GOP_VBIOS_CONTENT *vbios;
VFCT_IMAGE_HEADER *vhdr;
unsigned offset;
if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))
return false;
tbl_size = hdr->length;
if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {
DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");
goto out_unmap;
return false;
}
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;
}
offset = vfct->VBIOSImageOffset;
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);
while (offset < tbl_size) {
GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset);
VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader;
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;
offset += sizeof(VFCT_IMAGE_HEADER);
if (offset > tbl_size) {
DRM_ERROR("ACPI VFCT image header truncated\n");
return false;
}
if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {
offset += vhdr->ImageLength;
if (offset > tbl_size) {
DRM_ERROR("ACPI VFCT image truncated\n");
goto out_unmap;
return false;
}
rdev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);
ret = !!rdev->bios;
if (vhdr->ImageLength &&
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) {
rdev->bios = kmemdup(&vbios->VbiosContent,
vhdr->ImageLength,
GFP_KERNEL);
out_unmap:
return ret;
if (!rdev->bios) {
kfree(rdev->bios);
return false;
}
return true;
}
}
DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");
return false;
}
#else
static inline bool radeon_acpi_vfct_bios(struct radeon_device *rdev)
......
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