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9a8fd558 | 1 | /* |
f30c2269 | 2 | * include/asm-xtensa/dma-mapping.h |
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3 | * |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 2003 - 2005 Tensilica Inc. | |
9 | */ | |
10 | ||
11 | #ifndef _XTENSA_DMA_MAPPING_H | |
12 | #define _XTENSA_DMA_MAPPING_H | |
13 | ||
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14 | #include <asm/cache.h> |
15 | #include <asm/io.h> | |
16 | #include <linux/mm.h> | |
8c7837c4 | 17 | #include <linux/scatterlist.h> |
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18 | |
19 | /* | |
20 | * DMA-consistent mapping functions. | |
21 | */ | |
22 | ||
23 | extern void *consistent_alloc(int, size_t, dma_addr_t, unsigned long); | |
24 | extern void consistent_free(void*, size_t, dma_addr_t); | |
25 | extern void consistent_sync(void*, size_t, int); | |
26 | ||
27 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) | |
28 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
29 | ||
30 | void *dma_alloc_coherent(struct device *dev, size_t size, | |
5fb5cbed | 31 | dma_addr_t *dma_handle, gfp_t flag); |
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32 | |
33 | void dma_free_coherent(struct device *dev, size_t size, | |
34 | void *vaddr, dma_addr_t dma_handle); | |
35 | ||
36 | static inline dma_addr_t | |
37 | dma_map_single(struct device *dev, void *ptr, size_t size, | |
38 | enum dma_data_direction direction) | |
39 | { | |
40 | BUG_ON(direction == DMA_NONE); | |
41 | consistent_sync(ptr, size, direction); | |
42 | return virt_to_phys(ptr); | |
43 | } | |
44 | ||
45 | static inline void | |
46 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, | |
47 | enum dma_data_direction direction) | |
48 | { | |
49 | BUG_ON(direction == DMA_NONE); | |
50 | } | |
51 | ||
52 | static inline int | |
53 | dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
54 | enum dma_data_direction direction) | |
55 | { | |
56 | int i; | |
57 | ||
58 | BUG_ON(direction == DMA_NONE); | |
59 | ||
60 | for (i = 0; i < nents; i++, sg++ ) { | |
891039a9 | 61 | BUG_ON(!sg_page(sg)); |
9a8fd558 | 62 | |
891039a9 EM |
63 | sg->dma_address = sg_phys(sg); |
64 | consistent_sync(sg_virt(sg), sg->length, direction); | |
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65 | } |
66 | ||
67 | return nents; | |
68 | } | |
69 | ||
70 | static inline dma_addr_t | |
71 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, | |
72 | size_t size, enum dma_data_direction direction) | |
73 | { | |
74 | BUG_ON(direction == DMA_NONE); | |
75 | return (dma_addr_t)(page_to_pfn(page)) * PAGE_SIZE + offset; | |
76 | } | |
77 | ||
78 | static inline void | |
79 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, | |
80 | enum dma_data_direction direction) | |
81 | { | |
82 | BUG_ON(direction == DMA_NONE); | |
83 | } | |
84 | ||
85 | ||
86 | static inline void | |
87 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, | |
88 | enum dma_data_direction direction) | |
89 | { | |
90 | BUG_ON(direction == DMA_NONE); | |
91 | } | |
92 | ||
93 | static inline void | |
94 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, | |
95 | enum dma_data_direction direction) | |
96 | { | |
97 | consistent_sync((void *)bus_to_virt(dma_handle), size, direction); | |
98 | } | |
99 | ||
100 | static inline void | |
101 | dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, | |
102 | enum dma_data_direction direction) | |
103 | { | |
104 | consistent_sync((void *)bus_to_virt(dma_handle), size, direction); | |
105 | } | |
106 | ||
107 | static inline void | |
108 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, | |
109 | unsigned long offset, size_t size, | |
110 | enum dma_data_direction direction) | |
111 | { | |
112 | ||
113 | consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction); | |
114 | } | |
115 | ||
116 | static inline void | |
117 | dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, | |
118 | unsigned long offset, size_t size, | |
119 | enum dma_data_direction direction) | |
120 | { | |
121 | ||
122 | consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction); | |
123 | } | |
124 | static inline void | |
125 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, | |
126 | enum dma_data_direction dir) | |
127 | { | |
128 | int i; | |
129 | for (i = 0; i < nelems; i++, sg++) | |
891039a9 | 130 | consistent_sync(sg_virt(sg), sg->length, dir); |
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131 | } |
132 | ||
133 | static inline void | |
134 | dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, | |
135 | enum dma_data_direction dir) | |
136 | { | |
137 | int i; | |
138 | for (i = 0; i < nelems; i++, sg++) | |
891039a9 | 139 | consistent_sync(sg_virt(sg), sg->length, dir); |
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140 | } |
141 | static inline int | |
8d8bb39b | 142 | dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
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143 | { |
144 | return 0; | |
145 | } | |
146 | ||
147 | static inline int | |
148 | dma_supported(struct device *dev, u64 mask) | |
149 | { | |
150 | return 1; | |
151 | } | |
152 | ||
153 | static inline int | |
154 | dma_set_mask(struct device *dev, u64 mask) | |
155 | { | |
156 | if(!dev->dma_mask || !dma_supported(dev, mask)) | |
157 | return -EIO; | |
158 | ||
159 | *dev->dma_mask = mask; | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static inline int | |
165 | dma_get_cache_alignment(void) | |
166 | { | |
167 | return L1_CACHE_BYTES; | |
168 | } | |
169 | ||
f67637ee | 170 | #define dma_is_consistent(d, h) (1) |
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171 | |
172 | static inline void | |
d3fa72e4 | 173 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
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174 | enum dma_data_direction direction) |
175 | { | |
176 | consistent_sync(vaddr, size, direction); | |
177 | } | |
178 | ||
179 | #endif /* _XTENSA_DMA_MAPPING_H */ |