[PATCH] m68k: Add the generic dma API functions

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 61 insertions, 10 deletions

diff --git a/include/asm-m68k/dma-mapping.h b/include/asm-m68k/dma-mapping.h
index dffd59cf1364..4f8575edd81d 100644
--- a/include/asm-m68k/dma-mapping.h
+++ b/include/asm-m68k/dma-mapping.h
@@ -1,11 +1,63 @@
 #ifndef _M68K_DMA_MAPPING_H
 #define _M68K_DMA_MAPPING_H
 
+struct scatterlist;
 
-#ifdef CONFIG_PCI
-#include <asm-generic/dma-mapping.h>
-#else
-#include <asm-generic/dma-mapping-broken.h>
-#endif
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+	return 1;
+}
+
+static inline int dma_set_mask(struct device *dev, u64 mask)
+{
+	return 0;
+}
+
+extern void *dma_alloc_coherent(struct device *, size_t,
+				dma_addr_t *, int);
+extern void dma_free_coherent(struct device *, size_t,
+			      void *, dma_addr_t);
+
+extern dma_addr_t dma_map_single(struct device *, void *, size_t,
+				 enum dma_data_direction);
+static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
+				    size_t size, enum dma_data_direction dir)
+{
+}
+
+extern dma_addr_t dma_map_page(struct device *, struct page *,
+			       unsigned long, size_t size,
+			       enum dma_data_direction);
+static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
+				  size_t size, enum dma_data_direction dir)
+{
+}
+
+extern int dma_map_sg(struct device *, struct scatterlist *, int,
+		      enum dma_data_direction);
+static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
+				int nhwentries, enum dma_data_direction dir)
+{
+}
+
+extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
+				       enum dma_data_direction);
+extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
+				   enum dma_data_direction);
+
+static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
+					   size_t size, enum dma_data_direction dir)
+{
+}
+
+static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+				       int nents, enum dma_data_direction dir)
+{
+}
+
+static inline int dma_mapping_error(dma_addr_t handle)
+{
+	return 0;
+}
 
 #endif  /* _M68K_DMA_MAPPING_H */
diff --git a/include/asm-m68k/scatterlist.h b/include/asm-m68k/scatterlist.h
index d7c9b5c5e6c7..8e612266da51 100644
--- a/include/asm-m68k/scatterlist.h
+++ b/include/asm-m68k/scatterlist.h
@@ -2,18 +2,17 @@
 #define _M68K_SCATTERLIST_H
 
 struct scatterlist {
-	/* These two are only valid if ADDRESS member of this
-	 * struct is NULL.
-	 */
 	struct page *page;
 	unsigned int offset;
-
 	unsigned int length;
 
-	__u32 dvma_address; /* A place to hang host-specific addresses at. */
+	__u32 dma_address;	/* A place to hang host-specific addresses at. */
 };
 
 /* This is bogus and should go away. */
 #define ISA_DMA_THRESHOLD (0x00ffffff)
 
+#define sg_dma_address(sg)	((sg)->dma_address)
+#define sg_dma_len(sg)		((sg)->length)
+
 #endif /* !(_M68K_SCATTERLIST_H) */