The fixup code for PCI VGA devices in ia64 and x86 is mostly identical.
Merge it into a single function called from both sides.
The common code is moved to vgaarb.c which makes in dependant on CONFIG_VGA_ARB.
Tested-by: Anibal Francisco Martinez Cortina linuxkid.zeuz@gmail.com Cc: Matthew Garrett matthew.garrett@nebula.com Signed-off-by: Bruno Prémont bonbons@linux-vserver.org ---
Changes since v1: Added Tested-by, Cc
arch/ia64/pci/fixup.c | 77 ++---------------------------------------------- arch/x86/pci/fixup.c | 76 +---------------------------------------------- drivers/gpu/vga/vgaarb.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++ include/linux/vgaarb.h | 37 +++++++++++++++++++++++ 4 files changed, 116 insertions(+), 149 deletions(-)
diff --git a/arch/ia64/pci/fixup.c b/arch/ia64/pci/fixup.c index 9ed5bef..5df22f9 100644 --- a/arch/ia64/pci/fixup.c +++ b/arch/ia64/pci/fixup.c @@ -9,85 +9,14 @@
#include <asm/machvec.h>
-/* - * Fixup to mark boot BIOS video selected by BIOS before it changes - * - * From information provided by "Jon Smirl" jonsmirl@gmail.com - * - * The standard boot ROM sequence for an x86 machine uses the BIOS - * to select an initial video card for boot display. This boot video - * card will have it's BIOS copied to C0000 in system RAM. - * IORESOURCE_ROM_SHADOW is used to associate the boot video - * card with this copy. On laptops this copy has to be used since - * the main ROM may be compressed or combined with another image. - * See pci_map_rom() for use of this flag. Before marking the device - * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set - * by either arch cde or vga-arbitration, if so only apply the fixup to this - * already determined primary video card. - */ - -static void pci_fixup_video(struct pci_dev *pdev) +static void pci_ia64_fixup_video(struct pci_dev *pdev) { - struct pci_dev *bridge; - struct pci_bus *bus; - u16 config; - if ((strcmp(ia64_platform_name, "dig") != 0) && (strcmp(ia64_platform_name, "hpzx1") != 0)) return; /* Maybe, this machine supports legacy memory map. */
- if (!vga_default_device()) { - resource_size_t start, end; - int i; - - /* Does firmware framebuffer belong to us? */ - for (i=0; i < DEVICE_COUNT_RESOURCE; i++) { - if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) - continue; - - start = pci_resource_start(pdev, i); - end = pci_resource_end(pdev, i); - - if (!start || !end) - continue; - - if (screen_info.lfb_base >= start && - (screen_info.lfb_base + screen_info.lfb_size) < end) - vga_set_default_device(pdev); - } - } - - /* Is VGA routed to us? */ - bus = pdev->bus; - while (bus) { - bridge = bus->self; - - /* - * From information provided by - * "David Miller" davem@davemloft.net - * The bridge control register is valid for PCI header - * type BRIDGE, or CARDBUS. Host to PCI controllers use - * PCI header type NORMAL. - */ - if (bridge - &&((bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE) - ||(bridge->hdr_type == PCI_HEADER_TYPE_CARDBUS))) { - pci_read_config_word(bridge, PCI_BRIDGE_CONTROL, - &config); - if (!(config & PCI_BRIDGE_CTL_VGA)) - return; - } - bus = bus->parent; - } - if (!vga_default_device() || pdev == vga_default_device()) { - pci_read_config_word(pdev, PCI_COMMAND, &config); - if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { - pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW; - dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n"); - vga_set_default_device(pdev); - } - } + pci_fixup_video(pdev); } DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, - PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video); + PCI_CLASS_DISPLAY_VGA, 8, pci_ia64_fixup_video); diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index 7246cf2..b599847 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -302,81 +302,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_r DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk);
-/* - * Fixup to mark boot BIOS video selected by BIOS before it changes - * - * From information provided by "Jon Smirl" jonsmirl@gmail.com - * - * The standard boot ROM sequence for an x86 machine uses the BIOS - * to select an initial video card for boot display. This boot video - * card will have it's BIOS copied to C0000 in system RAM. - * IORESOURCE_ROM_SHADOW is used to associate the boot video - * card with this copy. On laptops this copy has to be used since - * the main ROM may be compressed or combined with another image. - * See pci_map_rom() for use of this flag. Before marking the device - * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set - * by either arch cde or vga-arbitration, if so only apply the fixup to this - * already determined primary video card. - */ - -static void pci_fixup_video(struct pci_dev *pdev) -{ - struct pci_dev *bridge; - struct pci_bus *bus; - u16 config; - - if (!vga_default_device()) { - resource_size_t start, end; - int i; - - /* Does firmware framebuffer belong to us? */ - for (i=0; i < DEVICE_COUNT_RESOURCE; i++) { - if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) - continue; - - start = pci_resource_start(pdev, i); - end = pci_resource_end(pdev, i); - - if (!start || !end) - continue; - - if (screen_info.lfb_base >= start && - (screen_info.lfb_base + screen_info.lfb_size) < end) - vga_set_default_device(pdev); - } - } - - /* Is VGA routed to us? */ - bus = pdev->bus; - while (bus) { - bridge = bus->self; - - /* - * From information provided by - * "David Miller" davem@davemloft.net - * The bridge control register is valid for PCI header - * type BRIDGE, or CARDBUS. Host to PCI controllers use - * PCI header type NORMAL. - */ - if (bridge - && ((bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE) - || (bridge->hdr_type == PCI_HEADER_TYPE_CARDBUS))) { - pci_read_config_word(bridge, PCI_BRIDGE_CONTROL, - &config); - if (!(config & PCI_BRIDGE_CTL_VGA)) - return; - } - bus = bus->parent; - } - if (!vga_default_device() || pdev == vga_default_device()) { - pci_read_config_word(pdev, PCI_COMMAND, &config); - if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { - pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW; - dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n"); - vga_set_default_device(pdev); - } - } -} +/* pci_fixup_video shared in vgaarb.c */ DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index af02597..f0fbdf6 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -149,6 +149,81 @@ void vga_set_default_device(struct pci_dev *pdev) } #endif
+/* + * Fixup to mark boot BIOS video selected by BIOS before it changes + * + * From information provided by "Jon Smirl" jonsmirl@gmail.com + * + * The standard boot ROM sequence for an x86 machine uses the BIOS + * to select an initial video card for boot display. This boot video + * card will have it's BIOS copied to C0000 in system RAM. + * IORESOURCE_ROM_SHADOW is used to associate the boot video + * card with this copy. On laptops this copy has to be used since + * the main ROM may be compressed or combined with another image. + * See pci_map_rom() for use of this flag. Before marking the device + * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set + * by either arch cde or vga-arbitration, if so only apply the fixup to this + * already determined primary video card. + */ + +void pci_fixup_video(struct pci_dev *pdev) +{ + struct pci_dev *bridge; + struct pci_bus *bus; + u16 config; + + if (!vga_default_device()) { + resource_size_t start, end; + int i; + + for (i=0; i < DEVICE_COUNT_RESOURCE; i++) { + if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) + continue; + + start = pci_resource_start(pdev, i); + end = pci_resource_end(pdev, i); + + if (!start || !end) + continue; + + if (screen_info.lfb_base >= start && + (screen_info.lfb_base + screen_info.lfb_size) < end) + vga_set_default_device(pdev); + } + } + + /* Is VGA routed to us? */ + bus = pdev->bus; + while (bus) { + bridge = bus->self; + + /* + * From information provided by + * "David Miller" davem@davemloft.net + * The bridge control register is valid for PCI header + * type BRIDGE, or CARDBUS. Host to PCI controllers use + * PCI header type NORMAL. + */ + if (bridge + && ((bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE) + || (bridge->hdr_type == PCI_HEADER_TYPE_CARDBUS))) { + pci_read_config_word(bridge, PCI_BRIDGE_CONTROL, + &config); + if (!(config & PCI_BRIDGE_CTL_VGA)) + return; + } + bus = bus->parent; + } + if (!vga_default_device() || pdev == vga_default_device()) { + pci_read_config_word(pdev, PCI_COMMAND, &config); + if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { + pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW; + dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n"); + vga_set_default_device(pdev); + } + } +} + static inline void vga_irq_set_state(struct vga_device *vgadev, bool state) { if (vgadev->irq_set_state) diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h index 2c02f3a..6518460 100644 --- a/include/linux/vgaarb.h +++ b/include/linux/vgaarb.h @@ -162,6 +162,43 @@ extern void vga_put(struct pci_dev *pdev, unsigned int rsrc); #define vga_put(pdev, rsrc) #endif
+/** + * pci_fixup_video + * + * This can be called by arch PCI to fixup boot VGA tagging + * of VGA PCI devices (e.g. for X86, IA64) + * + * This code was initially spread/duplicated across: + * - X86 PCI-fixup + * - IA64 PCI-fixup + * - EFI_FB + * + * * PCI-fixup part: + * Fixup to mark boot BIOS video selected by BIOS before it changes + * + * From information provided by "Jon Smirl" jonsmirl@gmail.com + * + * The standard boot ROM sequence for an x86 machine uses the BIOS + * to select an initial video card for boot display. This boot video + * card will have it's BIOS copied to C0000 in system RAM. + * IORESOURCE_ROM_SHADOW is used to associate the boot video + * card with this copy. On laptops this copy has to be used since + * the main ROM may be compressed or combined with another image. + * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW + * is marked here since the boot video device will be the only enabled + * video device at this point. + * + * * EFI_FB part: + * Some EFI-based system (e.g. Intel-Macs from Apple) do not setup + * shadow Video-BIOS and thus can only be detected by framebuffer + * IO memory range. Flag the corresponding GPU as boot_vga. + */ + +#if defined(CONFIG_VGA_ARB) +void pci_fixup_video(struct pci_dev *pdev); +#else +static inline void pci_fixup_video(struct pci_dev *pdev) { } +#endif
/** * vga_default_device