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| author | Michael S. Tsirkin <mst@redhat.com> | 2012-01-30 00:20:48 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2012-01-31 23:19:47 +0200 |
| commit | b923650b84068b74b6df838aa8f9b2a350171de6 (patch) | |
| tree | d6d366da5427816210dc15c7c401e4a7910092c4 | |
| parent | 0a9626575400879d1d5e6bc8768188b938d7c501 (diff) | |
| download | lwn-b923650b84068b74b6df838aa8f9b2a350171de6.tar.gz lwn-b923650b84068b74b6df838aa8f9b2a350171de6.zip | |
lib: add NO_GENERIC_PCI_IOPORT_MAP
Some architectures need to override the way
IO port mapping is done on PCI devices.
Supply a generic macro that calls
ioport_map, and make it possible for architectures
to override.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
| -rw-r--r-- | include/asm-generic/pci_iomap.h | 10 | ||||
| -rw-r--r-- | lib/Kconfig | 3 | ||||
| -rw-r--r-- | lib/pci_iomap.c | 2 |
3 files changed, 14 insertions, 1 deletions
diff --git a/include/asm-generic/pci_iomap.h b/include/asm-generic/pci_iomap.h index 8de4b73e19e2..e58fcf891370 100644 --- a/include/asm-generic/pci_iomap.h +++ b/include/asm-generic/pci_iomap.h @@ -15,6 +15,16 @@ struct pci_dev; #ifdef CONFIG_PCI /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); +/* Create a virtual mapping cookie for a port on a given PCI device. + * Do not call this directly, it exists to make it easier for architectures + * to override */ +#ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP +extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port, + unsigned int nr); +#else +#define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr)) +#endif + #else static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) { diff --git a/lib/Kconfig b/lib/Kconfig index 169eb7c598e5..1df13883481c 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -19,6 +19,9 @@ config RATIONAL config GENERIC_FIND_FIRST_BIT bool +config NO_GENERIC_PCI_IOPORT_MAP + bool + config GENERIC_PCI_IOMAP bool diff --git a/lib/pci_iomap.c b/lib/pci_iomap.c index 4b0fdc22e688..0d83ea8a9605 100644 --- a/lib/pci_iomap.c +++ b/lib/pci_iomap.c @@ -34,7 +34,7 @@ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) if (maxlen && len > maxlen) len = maxlen; if (flags & IORESOURCE_IO) - return ioport_map(start, len); + return __pci_ioport_map(dev, start, len); if (flags & IORESOURCE_MEM) { if (flags & IORESOURCE_CACHEABLE) return ioremap(start, len); |