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authorRussell King <rmk+kernel@arm.linux.org.uk>2009-10-31 19:10:10 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-11-23 15:53:55 +0300
commit29cb8d0d249f6b8fa33683cc17622ff16ada834c (patch)
treeaf145bb4d549793fc96aa2db63b32d4c9905ab9c /arch/arm/common
parentef1baed8870d1eebb0c08d9a466e703f1a21b484 (diff)
downloadlinux-29cb8d0d249f6b8fa33683cc17622ff16ada834c.tar.xz
ARM: dma-mapping: split dma_unmap_page() from dma_unmap_single()
We will need to treat dma_unmap_page() differently from dma_unmap_single() Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-By: Jamie Iles <jamie@jamieiles.com>
Diffstat (limited to 'arch/arm/common')
-rw-r--r--arch/arm/common/dmabounce.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index 734ac9135998..5a375e5fef21 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -342,6 +342,22 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
}
EXPORT_SYMBOL(dma_map_single);
+/*
+ * see if a mapped address was really a "safe" buffer and if so, copy
+ * the data from the safe buffer back to the unsafe buffer and free up
+ * the safe buffer. (basically return things back to the way they
+ * should be)
+ */
+void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+ enum dma_data_direction dir)
+{
+ dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
+ __func__, (void *) dma_addr, size, dir);
+
+ unmap_single(dev, dma_addr, size, dir);
+}
+EXPORT_SYMBOL(dma_unmap_single);
+
dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{
@@ -366,8 +382,7 @@ EXPORT_SYMBOL(dma_map_page);
* the safe buffer. (basically return things back to the way they
* should be)
*/
-
-void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
@@ -375,7 +390,7 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
unmap_single(dev, dma_addr, size, dir);
}
-EXPORT_SYMBOL(dma_unmap_single);
+EXPORT_SYMBOL(dma_unmap_page);
int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
unsigned long off, size_t sz, enum dma_data_direction dir)