powerpc/PCI: Add legacy PCI access via sysfs

This patch adds support for legacy_io and legacy_mem files in
bus class directories in sysfs for powerpc

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/pci.h b/arch/powerpc/include/asm/pci.h
index 0e52c7828ea4..39d547fde956 100644
--- a/arch/powerpc/include/asm/pci.h
+++ b/arch/powerpc/include/asm/pci.h
@@ -123,6 +123,16 @@ int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
 #define HAVE_PCI_MMAP   1
 
+extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
+                           size_t count);
+extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
+                           size_t count);
+extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
+                                      struct vm_area_struct *vma,
+                                      enum pci_mmap_state mmap_state);
+
+#define HAVE_PCI_LEGACY 1
+
 #if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
 /*
  * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
@@ -226,5 +236,6 @@ extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
 extern void pcibios_do_bus_setup(struct pci_bus *bus);
 extern void pcibios_fixup_of_probed_bus(struct pci_bus *bus);
 
+
 #endif  /* __KERNEL__ */
 #endif /* __ASM_POWERPC_PCI_H */