On 08/23/2012 12:36 PM, Matthew Garrett wrote:
Platforms may provide their own mechanisms for obtaining ROMs. Add support for using data provided by the platform in that case. Signed-off-by: Matthew Garrett<mjg@xxxxxxxxxx> --- drivers/pci/rom.c | 11 +++++++++-- include/linux/pci.h | 2 ++ 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/pci/rom.c b/drivers/pci/rom.c index 48ebdb2..46026e4 100644 --- a/drivers/pci/rom.c +++ b/drivers/pci/rom.c @@ -118,11 +118,17 @@ void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size) void __iomem *rom; /* + * Some devices may provide ROMs via a source other than the BAR + */ + if (pdev->rom&& pdev->romlen) { + *size = pdev->romlen; + return phys_to_virt((phys_addr_t)pdev->rom);
^^^^^ ioremap_nocache() ? ... or is caching rom ok?
+ /* * IORESOURCE_ROM_SHADOW set on x86, x86_64 and IA64 supports legacy * memory map if the VGA enable bit of the Bridge Control register is * set for embedded VGA. */ - if (res->flags& IORESOURCE_ROM_SHADOW) { + } else if (res->flags& IORESOURCE_ROM_SHADOW) { /* primary video rom always starts here */ start = (loff_t)0xC0000; *size = 0x20000; /* cover C000:0 through E000:0 */ @@ -219,7 +225,8 @@ void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom) if (res->flags& (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) return; - iounmap(rom); + if (!pdev->rom || !pdev->romlen) + iounmap(rom); /* Disable again before continuing, leave enabled if pci=rom */ if (!(res->flags& (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW))) diff --git a/include/linux/pci.h b/include/linux/pci.h index 6a2625c..2668bb9 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -355,6 +355,8 @@ struct pci_dev { }; struct pci_ats *ats; /* Address Translation Service */ #endif + void *rom; /* Physical pointer to ROM if it's not from the BAR */ + size_t romlen; /* Length of ROM if it's not from the BAR */ }; static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
-- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html