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6514 | serge | 1 | #ifndef _ASM_GENERIC_DMA_MAPPING_H |
2 | #define _ASM_GENERIC_DMA_MAPPING_H |
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3 | |||
4 | /* define the dma api to allow compilation but not linking of |
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5 | * dma dependent code. Code that depends on the dma-mapping |
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6 | * API needs to set 'depends on HAS_DMA' in its Kconfig |
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7 | */ |
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8 | |||
9 | struct scatterlist; |
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10 | |||
11 | extern void * |
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12 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
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13 | gfp_t flag); |
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14 | |||
15 | extern void |
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16 | dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, |
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17 | dma_addr_t dma_handle); |
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18 | |||
19 | static inline void *dma_alloc_attrs(struct device *dev, size_t size, |
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20 | dma_addr_t *dma_handle, gfp_t flag, |
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21 | struct dma_attrs *attrs) |
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22 | { |
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23 | /* attrs is not supported and ignored */ |
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24 | return dma_alloc_coherent(dev, size, dma_handle, flag); |
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25 | } |
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26 | |||
27 | static inline void dma_free_attrs(struct device *dev, size_t size, |
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28 | void *cpu_addr, dma_addr_t dma_handle, |
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29 | struct dma_attrs *attrs) |
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30 | { |
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31 | /* attrs is not supported and ignored */ |
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32 | dma_free_coherent(dev, size, cpu_addr, dma_handle); |
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33 | } |
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34 | |||
35 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
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36 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
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37 | |||
38 | extern dma_addr_t |
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39 | dma_map_single(struct device *dev, void *ptr, size_t size, |
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40 | enum dma_data_direction direction); |
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41 | |||
42 | extern void |
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43 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, |
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44 | enum dma_data_direction direction); |
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45 | |||
46 | extern int |
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47 | dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, |
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48 | enum dma_data_direction direction); |
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49 | |||
50 | extern void |
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51 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, |
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52 | enum dma_data_direction direction); |
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53 | |||
54 | extern dma_addr_t |
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55 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, |
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56 | size_t size, enum dma_data_direction direction); |
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57 | |||
58 | extern void |
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59 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, |
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60 | enum dma_data_direction direction); |
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61 | |||
62 | extern void |
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63 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, |
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64 | enum dma_data_direction direction); |
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65 | |||
66 | extern void |
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67 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, |
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68 | unsigned long offset, size_t size, |
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69 | enum dma_data_direction direction); |
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70 | |||
71 | extern void |
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72 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, |
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73 | enum dma_data_direction direction); |
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74 | |||
75 | #define dma_sync_single_for_device dma_sync_single_for_cpu |
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76 | #define dma_sync_single_range_for_device dma_sync_single_range_for_cpu |
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77 | #define dma_sync_sg_for_device dma_sync_sg_for_cpu |
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78 | |||
79 | extern int |
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80 | dma_mapping_error(struct device *dev, dma_addr_t dma_addr); |
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81 | |||
82 | extern int |
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83 | dma_supported(struct device *dev, u64 mask); |
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84 | |||
85 | extern int |
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86 | dma_set_mask(struct device *dev, u64 mask); |
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87 | |||
88 | extern int |
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89 | dma_get_cache_alignment(void); |
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90 | |||
91 | extern void |
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92 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
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93 | enum dma_data_direction direction); |
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94 | |||
95 | #endif /* _ASM_GENERIC_DMA_MAPPING_H */ |