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1da177e4 LT |
1 | #ifndef _ASM_LINUX_DMA_MAPPING_H |
2 | #define _ASM_LINUX_DMA_MAPPING_H | |
3 | ||
4 | #include <linux/device.h> | |
5 | #include <linux/err.h> | |
6 | ||
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, | |
14 | }; | |
15 | ||
16 | #define DMA_64BIT_MASK 0xffffffffffffffffULL | |
17 | #define DMA_32BIT_MASK 0x00000000ffffffffULL | |
18 | ||
19 | #include <asm/dma-mapping.h> | |
20 | ||
21 | /* Backwards compat, remove in 2.7.x */ | |
22 | #define dma_sync_single dma_sync_single_for_cpu | |
23 | #define dma_sync_sg dma_sync_sg_for_cpu | |
24 | ||
25 | extern u64 dma_get_required_mask(struct device *dev); | |
26 | ||
27 | /* flags for the coherent memory api */ | |
28 | #define DMA_MEMORY_MAP 0x01 | |
29 | #define DMA_MEMORY_IO 0x02 | |
30 | #define DMA_MEMORY_INCLUDES_CHILDREN 0x04 | |
31 | #define DMA_MEMORY_EXCLUSIVE 0x08 | |
32 | ||
33 | #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY | |
34 | static inline int | |
35 | dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, | |
36 | dma_addr_t device_addr, size_t size, int flags) | |
37 | { | |
38 | return 0; | |
39 | } | |
40 | ||
41 | static inline void | |
42 | dma_release_declared_memory(struct device *dev) | |
43 | { | |
44 | } | |
45 | ||
46 | static inline void * | |
47 | dma_mark_declared_memory_occupied(struct device *dev, | |
48 | dma_addr_t device_addr, size_t size) | |
49 | { | |
50 | return ERR_PTR(-EBUSY); | |
51 | } | |
52 | #endif | |
53 | ||
54 | #endif | |
55 | ||
56 |