---

yaml --- r: 138888 b: refs/heads/master c: 052aedb h: refs/heads/master v: v3
git-mirror · Jan 6, 2009 · 80484b2 · 80484b2
1 parent fe327d5
commit 80484b2
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Showing 2 changed files with 24 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4cf37bb7d9dc6dfb5d5fca7f735ba65ba173dabc
+refs/heads/master: 052aedbfb6cd4fd1a73010735da88a9dcc224673
diff --git a/trunk/arch/x86/kernel/pci-gart_64.c b/trunk/arch/x86/kernel/pci-gart_64.c
@@ -255,10 +255,13 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
 }
 
 /* Map a single area into the IOMMU */
-static dma_addr_t
-gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
+static dma_addr_t gart_map_page(struct device *dev, struct page *page,
+				unsigned long offset, size_t size,
+				enum dma_data_direction dir,
+				struct dma_attrs *attrs)
 {
 	unsigned long bus;
+	phys_addr_t paddr = page_to_phys(page) + offset;
 
 	if (!dev)
 		dev = &x86_dma_fallback_dev;
@@ -272,11 +275,19 @@ gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
 	return bus;
 }
 
+static dma_addr_t gart_map_single(struct device *dev, phys_addr_t paddr,
+				  size_t size, int dir)
+{
+	return gart_map_page(dev, pfn_to_page(paddr >> PAGE_SHIFT),
+			     paddr & ~PAGE_MASK, size, dir, NULL);
+}
+
 /*
  * Free a DMA mapping.
  */
-static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
-			      size_t size, int direction)
+static void gart_unmap_page(struct device *dev, dma_addr_t dma_addr,
+			    size_t size, enum dma_data_direction dir,
+			    struct dma_attrs *attrs)
 {
 	unsigned long iommu_page;
 	int npages;
@@ -295,6 +306,12 @@ static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
 	free_iommu(iommu_page, npages);
 }
 
+static void gart_unmap_single(struct device *dev, dma_addr_t dma_addr,
+			      size_t size, int direction)
+{
+	gart_unmap_page(dev, dma_addr, size, direction, NULL);
+}
+
 /*
  * Wrapper for pci_unmap_single working with scatterlists.
  */
@@ -712,6 +729,8 @@ static struct dma_mapping_ops gart_dma_ops = {
 	.unmap_single			= gart_unmap_single,
 	.map_sg				= gart_map_sg,
 	.unmap_sg			= gart_unmap_sg,
+	.map_page			= gart_map_page,
+	.unmap_page			= gart_unmap_page,
 	.alloc_coherent			= gart_alloc_coherent,
 	.free_coherent			= gart_free_coherent,
 };