Support a shadowed ROM when running with an ACPI capable PROM. Define a new dev.resource flag IORESOURCE_ROM_BIOS_COPY to describe the case of a BIOS shadowed ROM, which can then be used to avoid pci_map_rom() making an unneeded call to pci_enable_rom(). Signed-off-by: John Keller <jpk@xxxxxxx> --- arch/ia64/sn/kernel/io_acpi_init.c | 33 +++++++++++++++++++++++++++ arch/ia64/sn/kernel/io_common.c | 5 ++-- arch/ia64/sn/kernel/io_init.c | 3 ++ drivers/pci/rom.c | 9 ++++--- include/linux/ioport.h | 1 5 files changed, 46 insertions(+), 5 deletions(-) Index: linux-2.6/arch/ia64/sn/kernel/io_common.c =================================================================== --- linux-2.6.orig/arch/ia64/sn/kernel/io_common.c 2006-10-02 14:26:53.712813469 -0500 +++ linux-2.6/arch/ia64/sn/kernel/io_common.c 2006-10-02 14:27:35.173944595 -0500 @@ -286,9 +286,10 @@ void sn_pci_fixup_slot(struct pci_dev *d list_add_tail(&pcidev_info->pdi_list, &(SN_PLATFORM_DATA(dev->bus)->pcidev_info)); - if (!SN_ACPI_BASE_SUPPORT()) + if (SN_ACPI_BASE_SUPPORT()) + sn_acpi_slot_fixup(dev, pcidev_info); + else sn_more_slot_fixup(dev, pcidev_info); - /* * Using the PROMs values for the PCI host bus, get the Linux * PCI host_pci_dev struct and set up host bus linkages Index: linux-2.6/drivers/pci/rom.c =================================================================== --- linux-2.6.orig/drivers/pci/rom.c 2006-10-02 14:16:22.114966261 -0500 +++ linux-2.6/drivers/pci/rom.c 2006-10-02 14:27:35.173944595 -0500 @@ -77,7 +77,8 @@ void __iomem *pci_map_rom(struct pci_dev start = (loff_t)0xC0000; *size = 0x20000; /* cover C000:0 through E000:0 */ } else { - if (res->flags & IORESOURCE_ROM_COPY) { + if (res->flags & + (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) { *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); return (void __iomem *)(unsigned long) pci_resource_start(pdev, PCI_ROM_RESOURCE); @@ -161,7 +162,8 @@ void __iomem *pci_map_rom_copy(struct pc if (!rom) return NULL; - if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_SHADOW)) + if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_SHADOW | + IORESOURCE_ROM_BIOS_COPY)) return rom; res->start = (unsigned long)kmalloc(*size, GFP_KERNEL); @@ -187,7 +189,7 @@ void pci_unmap_rom(struct pci_dev *pdev, { struct resource *res = &pdev->resource[PCI_ROM_RESOURCE]; - if (res->flags & IORESOURCE_ROM_COPY) + if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) return; iounmap(rom); @@ -211,6 +213,7 @@ void pci_remove_rom(struct pci_dev *pdev sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr); if (!(res->flags & (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW | + IORESOURCE_ROM_BIOS_COPY | IORESOURCE_ROM_COPY))) pci_disable_rom(pdev); } Index: linux-2.6/include/linux/ioport.h =================================================================== --- linux-2.6.orig/include/linux/ioport.h 2006-10-02 14:16:24.479255982 -0500 +++ linux-2.6/include/linux/ioport.h 2006-10-02 14:27:35.173944595 -0500 @@ -89,6 +89,7 @@ struct resource_list { #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ +#define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ extern struct resource ioport_resource; Index: linux-2.6/arch/ia64/sn/kernel/io_acpi_init.c =================================================================== --- linux-2.6.orig/arch/ia64/sn/kernel/io_acpi_init.c 2006-10-02 14:26:53.712813469 -0500 +++ linux-2.6/arch/ia64/sn/kernel/io_acpi_init.c 2006-10-02 14:27:35.173944595 -0500 @@ -169,6 +169,39 @@ sn_acpi_bus_fixup(struct pci_bus *bus) } } +/* + * sn_acpi_slot_fixup - Perform any SN specific slot fixup. + * At present there does not appear to be + * any generic way to handle a ROM image + * that has been shadowed by the PROM, so + * we pass a pointer to it within the + * pcidev_info structure. + */ + +void +sn_acpi_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info) +{ + void __iomem *addr; + size_t size; + + if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) { + /* + * A valid ROM image exists and has been shadowed by the + * PROM. Setup the pci_dev ROM resource to point to + * the shadowed copy. + */ + size = dev->resource[PCI_ROM_RESOURCE].end - + dev->resource[PCI_ROM_RESOURCE].start; + addr = + ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE], + size); + dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr; + dev->resource[PCI_ROM_RESOURCE].end = + (unsigned long) addr + size; + dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY; + } +} + static struct acpi_driver acpi_sn_hubdev_driver = { .name = "SGI HUBDEV Driver", .ids = "SGIHUB,SGITIO", Index: linux-2.6/arch/ia64/sn/kernel/io_init.c =================================================================== --- linux-2.6.orig/arch/ia64/sn/kernel/io_init.c 2006-10-02 14:26:53.696811489 -0500 +++ linux-2.6/arch/ia64/sn/kernel/io_init.c 2006-10-02 14:27:35.173944595 -0500 @@ -210,6 +210,9 @@ sn_more_slot_fixup(struct pci_dev *dev, dev->resource[idx].parent = &ioport_resource; else dev->resource[idx].parent = &iomem_resource; + /* If ROM, mark as shadowed in PROM */ + if (idx == PCI_ROM_RESOURCE) + dev->resource[idx].flags |= IORESOURCE_ROM_BIOS_COPY; } /* Create a pci_window in the pci_controller struct for * each device resource. - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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