X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fdma-mapping.h;h=9a663c6db16a09faf68fe0d544e1c41695a9a6ef;hb=8559840c4ca3f2fff73a882803bc8916078fac1f;hp=ff61817082fa80271a24f4b2ad70623c013dfc26;hpb=55308c3712f56279d5547ef6e97d365ac3ab9e6d;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index ff61817082f..9a663c6db16 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -14,6 +14,7 @@ enum dma_data_direction {
 };
 
 #define DMA_64BIT_MASK	0xffffffffffffffffULL
+#define DMA_48BIT_MASK	0x0000ffffffffffffULL
 #define DMA_40BIT_MASK	0x000000ffffffffffULL
 #define DMA_39BIT_MASK	0x0000007fffffffffULL
 #define DMA_32BIT_MASK	0x00000000ffffffffULL
@@ -23,6 +24,13 @@ enum dma_data_direction {
 #define DMA_28BIT_MASK	0x000000000fffffffULL
 #define DMA_24BIT_MASK	0x0000000000ffffffULL
 
+static inline int valid_dma_direction(int dma_direction)
+{
+	return ((dma_direction == DMA_BIDIRECTIONAL) ||
+		(dma_direction == DMA_TO_DEVICE) ||
+		(dma_direction == DMA_FROM_DEVICE));
+}
+
 #include <asm/dma-mapping.h>
 
 /* Backwards compat, remove in 2.7.x */
@@ -58,6 +66,33 @@ dma_mark_declared_memory_occupied(struct device *dev,
 }
 #endif
 
-#endif
+/*
+ * Managed DMA API
+ */
+extern void *dmam_alloc_coherent(struct device *dev, size_t size,
+				 dma_addr_t *dma_handle, gfp_t gfp);
+extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,
+			       dma_addr_t dma_handle);
+extern void *dmam_alloc_noncoherent(struct device *dev, size_t size,
+				    dma_addr_t *dma_handle, gfp_t gfp);
+extern void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr,
+				  dma_addr_t dma_handle);
+#ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+extern int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+					dma_addr_t device_addr, size_t size,
+					int flags);
+extern void dmam_release_declared_memory(struct device *dev);
+#else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
+static inline int dmam_declare_coherent_memory(struct device *dev,
+				dma_addr_t bus_addr, dma_addr_t device_addr,
+				size_t size, gfp_t gfp)
+{
+	return 0;
+}
 
+static inline void dmam_release_declared_memory(struct device *dev)
+{
+}
+#endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
 
+#endif