[SPARC64]: Implement pci_resource_to_user()

This makes libpciaccess able to mmap() resources of the
device properly.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 20 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index 63b3ebc0c3c2..a61c38fe75ea 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -1275,4 +1275,20 @@ int pci_dma_supported(struct pci_dev *pdev, u64 device_mask)
         return (device_mask & dma_addr_mask) == dma_addr_mask;
 }
 
+void pci_resource_to_user(const struct pci_dev *pdev, int bar,
+                          const struct resource *rp, resource_size_t *start,
+                          resource_size_t *end)
+{
+        struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
+        unsigned long offset;
+
+        if (rp->flags & IORESOURCE_IO)
+                offset = pbm->io_space.start;
+        else
+                offset = pbm->mem_space.start;
+
+        *start = rp->start - offset;
+        *end = rp->end - offset;
+}
+
 #endif /* !(CONFIG_PCI) */
diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h
index 1393e57d50fb..f59f2571295b 100644
--- a/include/asm-sparc64/pci.h
+++ b/include/asm-sparc64/pci.h
@@ -200,6 +200,10 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 struct device_node;
 extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
 
+#define HAVE_ARCH_PCI_RESOURCE_TO_USER
+extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
+                                 const struct resource *rsrc,
+                                 resource_size_t *start, resource_size_t *end);
 #endif /* __KERNEL__ */
 
 #endif /* __SPARC64_PCI_H */