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ACPI/PCI: PCI extended config _OSC support called when root bridge added

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The _OSC capability OSC_EXT_PCI_CONFIG_SUPPORT is set when the root
bridge is added with pci_acpi_osc_support() if we can access PCI
extended config space.

This adds the function pci_ext_cfg_avail which returns true if we can
access PCI extended config space (offset greater than 0xff). It
currently only returns false if arch=x86 and raw_pci_ext_ops is not set
(which might happen if pci=nommcfg is set on the kernel command-line).

Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Andrew Patterson
2008-11-10 15:30:50 -07:00
committed by Jesse Barnes
parent 990a7ac564
commit 0ef5f8f615
4 changed files with 31 additions and 2 deletions
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2
include/linux/pci.h
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@@ -1140,6 +1140,8 @@ static inline void pci_mmcfg_early_init(void) { }
static inline void pci_mmcfg_late_init(void) { }
#endif
int pci_ext_cfg_avail(struct pci_dev *dev);
#ifdef CONFIG_HAS_IOMEM
static inline void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar)
{