From 17ed9be815821f18eb2a42282fa5416c06da03b0 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 25 Jan 2017 15:35:38 -0500 Subject: [PATCH] drm/amdgpu: 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: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c | 66 ++++++++++++------------ 1 file changed, 34 insertions(+), 32 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c index 2602ea12971e..d9def01f276e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c @@ -358,8 +358,7 @@ static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) 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; @@ -370,42 +369,45 @@ static bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) } 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"); - return false; - } + 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); - - 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"); - return false; - } + while (offset < tbl_size) { + GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset); + VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader; - if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) { - DRM_ERROR("ACPI VFCT image truncated\n"); - return false; - } + offset += sizeof(VFCT_IMAGE_HEADER); + if (offset > tbl_size) { + DRM_ERROR("ACPI VFCT image header truncated\n"); + return false; + } - adev->bios = kmemdup(&vbios->VbiosContent, - vhdr->ImageLength, - GFP_KERNEL); + offset += vhdr->ImageLength; + if (offset > tbl_size) { + DRM_ERROR("ACPI VFCT image truncated\n"); + return false; + } - if (!check_atom_bios(adev->bios, vhdr->ImageLength)) { - kfree(adev->bios); - return false; + if (vhdr->ImageLength && + 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) { + adev->bios = kmemdup(&vbios->VbiosContent, + vhdr->ImageLength, + GFP_KERNEL); + + if (!check_atom_bios(adev->bios, vhdr->ImageLength)) { + kfree(adev->bios); + return false; + } + adev->bios_size = vhdr->ImageLength; + return true; + } } - adev->bios_size = vhdr->ImageLength; - return true; + DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n"); + return false; } #else static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev) -- 2.20.1