From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: [PATCH 1/2] drm/radeon: implement ACPI VFCT vbios fetch Date: Thu, 16 Aug 2012 11:25:47 -0700 Message-ID: <20120816182547.GB31978@kroah.com> References: <1345139696-28050-1-git-send-email-alexdeucher@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pz0-f49.google.com (mail-pz0-f49.google.com [209.85.210.49]) by gabe.freedesktop.org (Postfix) with ESMTP id 89CF9A0DEB for ; Thu, 16 Aug 2012 11:25:52 -0700 (PDT) Received: by dajq27 with SMTP id q27so542705daj.36 for ; Thu, 16 Aug 2012 11:25:52 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1345139696-28050-1-git-send-email-alexdeucher@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: alexdeucher@gmail.com Cc: Alex Deucher , stable@vger.kernel.org, dri-devel@lists.freedesktop.org, David L List-Id: dri-devel@lists.freedesktop.org On Thu, Aug 16, 2012 at 01:54:55PM -0400, alexdeucher@gmail.com wrote: > From: David L > > 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 > 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 > #include > +#ifdef CONFIG_ACPI > +#include > +#endif This #ifdef should not be needed, right? > +#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 Please provide an "empty" function here if the #ifdef is not true, which then makes the following #ifdef not needed: > @@ -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 See, then that #ifdef isn't needed. That cleans up the code more, remember, we don't want #ifdefs in .c files unless we _really_ have to have them. thanks, greg k-h