Attachment 65357 Details for Bug 26891 – VFCT patch

[patch] VFCT patch

0001-drm-radeon-implement-ACPI-VFCT-vbios-fetch.patch (text/plain), 3.08 KB, created by Alex Deucher on 2012-08-09 21:10:43 UTC

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Creator: Alex Deucher

Created: 2012-08-09 21:10:43 UTC

Size: 3.08 KB

patch

obsolete

>From 609478283618641ecca53175d69f00d950afe949 Mon Sep 17 00:00:00 2001
>From: David L <equinox-freedesktopbugs@diac24.net>
>Date: Thu, 9 Aug 2012 17:05:31 -0400
>Subject: [PATCH] drm/radeon: implement ACPI VFCT vbios fetch
>
>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.deucher@amd.com>
>Cc: stable@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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