1 files changed, 56 insertions, 0 deletions

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
new file mode 100644
index 000000000000..806c305332c1
--- /dev/null
+++ b/include/linux/dma-mapping.h
@@ -0,0 +1,56 @@
+#ifndef _ASM_LINUX_DMA_MAPPING_H
+#define _ASM_LINUX_DMA_MAPPING_H
+
+#include <linux/device.h>
+#include <linux/err.h>
+
+/* These definitions mirror those in pci.h, so they can be used
+ * interchangeably with their PCI_ counterparts */
+enum dma_data_direction {
+        DMA_BIDIRECTIONAL = 0,
+        DMA_TO_DEVICE = 1,
+        DMA_FROM_DEVICE = 2,
+        DMA_NONE = 3,
+};
+
+#define DMA_64BIT_MASK  0xffffffffffffffffULL
+#define DMA_32BIT_MASK  0x00000000ffffffffULL
+
+#include <asm/dma-mapping.h>
+
+/* Backwards compat, remove in 2.7.x */
+#define dma_sync_single         dma_sync_single_for_cpu
+#define dma_sync_sg             dma_sync_sg_for_cpu
+
+extern u64 dma_get_required_mask(struct device *dev);
+
+/* flags for the coherent memory api */
+#define DMA_MEMORY_MAP                  0x01
+#define DMA_MEMORY_IO                   0x02
+#define DMA_MEMORY_INCLUDES_CHILDREN    0x04
+#define DMA_MEMORY_EXCLUSIVE            0x08
+
+#ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+static inline int
+dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+                            dma_addr_t device_addr, size_t size, int flags)
+{
+        return 0;
+}
+
+static inline void
+dma_release_declared_memory(struct device *dev)
+{
+}
+
+static inline void *
+dma_mark_declared_memory_occupied(struct device *dev,
+                                  dma_addr_t device_addr, size_t size)
+{
+        return ERR_PTR(-EBUSY);
+}
+#endif
+
+#endif
+
+