Linux v2.6.15-rc7
[pohmelfs.git] / include / linux / dma-mapping.h
blob2d80cc761a15948179fefc0abe5a686b9abc2b81
1 #ifndef _ASM_LINUX_DMA_MAPPING_H
2 #define _ASM_LINUX_DMA_MAPPING_H
4 #include <linux/device.h>
5 #include <linux/err.h>
7 /* These definitions mirror those in pci.h, so they can be used
8 * interchangeably with their PCI_ counterparts */
9 enum dma_data_direction {
10 DMA_BIDIRECTIONAL = 0,
11 DMA_TO_DEVICE = 1,
12 DMA_FROM_DEVICE = 2,
13 DMA_NONE = 3,
16 #define DMA_64BIT_MASK 0xffffffffffffffffULL
17 #define DMA_40BIT_MASK 0x000000ffffffffffULL
18 #define DMA_39BIT_MASK 0x0000007fffffffffULL
19 #define DMA_32BIT_MASK 0x00000000ffffffffULL
20 #define DMA_31BIT_MASK 0x000000007fffffffULL
21 #define DMA_30BIT_MASK 0x000000003fffffffULL
22 #define DMA_29BIT_MASK 0x000000001fffffffULL
24 #include <asm/dma-mapping.h>
26 /* Backwards compat, remove in 2.7.x */
27 #define dma_sync_single dma_sync_single_for_cpu
28 #define dma_sync_sg dma_sync_sg_for_cpu
30 extern u64 dma_get_required_mask(struct device *dev);
32 /* flags for the coherent memory api */
33 #define DMA_MEMORY_MAP 0x01
34 #define DMA_MEMORY_IO 0x02
35 #define DMA_MEMORY_INCLUDES_CHILDREN 0x04
36 #define DMA_MEMORY_EXCLUSIVE 0x08
38 #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
39 static inline int
40 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
41 dma_addr_t device_addr, size_t size, int flags)
43 return 0;
46 static inline void
47 dma_release_declared_memory(struct device *dev)
51 static inline void *
52 dma_mark_declared_memory_occupied(struct device *dev,
53 dma_addr_t device_addr, size_t size)
55 return ERR_PTR(-EBUSY);
57 #endif
59 #endif