[patch 32/73] SPARC64: Implement pci_resource_to_user()

[Greg KH]

2.6.23-stable review patch.  If anyone has any objections, please let us know.
------------------
From: David Miller <davem@xxxxxxxxxxxxx>

[SPARC64]: Implement pci_resource_to_user()

[ Upstream commit: bcea1db16ba1c45ccebb3bfb8441642d1342c4d5 ]

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

Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 arch/sparc64/kernel/pci.c |   16 ++++++++++++++++
 include/asm-sparc64/pci.h |    4 ++++
 2 files changed, 20 insertions(+)

--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -1276,4 +1276,20 @@ int pci_dma_supported(struct pci_dev *pd
 	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) */
--- 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 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 */

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