[PATCH 0/4] dma: dma_{un}map_{single|sg}_attrs() interface

[akepner@sgi.com]

Introduce a new interface for passing architecture-specific 
attributes when memory is mapped and unmapped for DMA. Give 
the interface a default implementation which ignores 
attributes.

Signed-off-by: Arthur Kepner <akepner@sgi.com>

--

 dma-mapping.h |   33 +++++++++++++++++++++++++++++++++
 1 files changed, 33 insertions(+)

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 101a2d4..bc313e3 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -116,4 +116,37 @@ static inline void dmam_release_declared_memory(struct device *dev)
 }
 #endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
 
+#ifndef ARCH_USES_DMA_ATTRS
+struct dma_attrs;
+
+static inline dma_addr_t dma_map_single_attrs(struct device *dev, 
+					      void *cpu_addr, size_t size, 
+					      int dir, struct dma_attrs* attrs)
+{
+	return dma_map_single(dev, cpu_addr, size, dir);
+}
+
+static inline void dma_unmap_single_attrs(struct device *dev, 
+					  dma_addr_t dma_addr,
+					  size_t size, int dir, 
+					  struct dma_attrs* attrs)
+{
+	return dma_unmap_single(dev, dma_addr, size, dir);
+}
+
+static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
+				   int nents, int dir, struct dma_attrs *attrs)
+{
+	return dma_map_sg(dev, sgl, nents, dir);
+}
+
+static inline void dma_unmap_sg_attrs(struct device *dev, 
+				      struct scatterlist *sgl,
+				      int nents, int dir, 
+				      struct dma_attrs *attrs)
+{
+	return dma_unmap_sg(dev, sgl, nents, dir);
+}
+#endif /* ARCH_USES_DMA_ATTRS */
+
 #endif