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 <[email protected]>
---
dma-mapping.h | 35 +++++++++++++++++++++++++++++++++++
1 files changed, 35 insertions(+)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 101a2d4..4a49abe 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -116,4 +116,39 @@ 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,
+ enum dma_data_direction 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,
+ enum dma_data_direction 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, enum dma_data_direction 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,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ return dma_unmap_sg(dev, sgl, nents, dir);
+}
+#endif /* ARCH_USES_DMA_ATTRS */
+
#endif