diff options
| author | Matthew Garrett <mjg@redhat.com> | 2012-12-05 14:33:27 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-12-05 14:38:26 -0700 |
| commit | 84c1b80e32638f881c17390dfe88143e5cd3f583 (patch) | |
| tree | 64310c48ed0dce9d830bd60d280ac0fb59ee28a1 | |
| parent | eca0d4676d8e29c209ddce0c0c1755472ffc70a6 (diff) | |
PCI: Add support for non-BAR ROMs
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@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Seth Forshee <seth.forshee@canonical.com>
| -rw-r--r-- | drivers/pci/rom.c | 11 | ||||
| -rw-r--r-- | 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 0b3037ab8b93..3a3828fbc879 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); + /* * 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 */ @@ -181,7 +187,8 @@ 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 195c2593bd31..f116b2d859dc 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -333,6 +333,8 @@ 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) |