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9a8fd558 | 1 | /* |
f30c2269 | 2 | * include/asm-xtensa/dma-mapping.h |
9a8fd558 CZ |
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 | ||
9a8fd558 CZ |
14 | #include <asm/cache.h> |
15 | #include <asm/io.h> | |
16 | #include <linux/mm.h> | |
8c7837c4 | 17 | #include <linux/scatterlist.h> |
9a8fd558 | 18 | |
35b16a9a MF |
19 | #define DMA_ERROR_CODE (~(dma_addr_t)0x0) |
20 | ||
9a8fd558 CZ |
21 | /* |
22 | * DMA-consistent mapping functions. | |
23 | */ | |
24 | ||
25 | extern void *consistent_alloc(int, size_t, dma_addr_t, unsigned long); | |
26 | extern void consistent_free(void*, size_t, dma_addr_t); | |
27 | extern void consistent_sync(void*, size_t, int); | |
28 | ||
29 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) | |
30 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
31 | ||
32 | void *dma_alloc_coherent(struct device *dev, size_t size, | |
5fb5cbed | 33 | dma_addr_t *dma_handle, gfp_t flag); |
9a8fd558 CZ |
34 | |
35 | void dma_free_coherent(struct device *dev, size_t size, | |
36 | void *vaddr, dma_addr_t dma_handle); | |
37 | ||
38 | static inline dma_addr_t | |
39 | dma_map_single(struct device *dev, void *ptr, size_t size, | |
40 | enum dma_data_direction direction) | |
41 | { | |
42 | BUG_ON(direction == DMA_NONE); | |
43 | consistent_sync(ptr, size, direction); | |
44 | return virt_to_phys(ptr); | |
45 | } | |
46 | ||
47 | static inline void | |
48 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, | |
49 | enum dma_data_direction direction) | |
50 | { | |
51 | BUG_ON(direction == DMA_NONE); | |
52 | } | |
53 | ||
54 | static inline int | |
55 | dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
56 | enum dma_data_direction direction) | |
57 | { | |
58 | int i; | |
59 | ||
60 | BUG_ON(direction == DMA_NONE); | |
61 | ||
62 | for (i = 0; i < nents; i++, sg++ ) { | |
891039a9 | 63 | BUG_ON(!sg_page(sg)); |
9a8fd558 | 64 | |
891039a9 EM |
65 | sg->dma_address = sg_phys(sg); |
66 | consistent_sync(sg_virt(sg), sg->length, direction); | |
9a8fd558 CZ |
67 | } |
68 | ||
69 | return nents; | |
70 | } | |
71 | ||
72 | static inline dma_addr_t | |
73 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, | |
74 | size_t size, enum dma_data_direction direction) | |
75 | { | |
76 | BUG_ON(direction == DMA_NONE); | |
77 | return (dma_addr_t)(page_to_pfn(page)) * PAGE_SIZE + offset; | |
78 | } | |
79 | ||
80 | static inline void | |
81 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, | |
82 | enum dma_data_direction direction) | |
83 | { | |
84 | BUG_ON(direction == DMA_NONE); | |
85 | } | |
86 | ||
87 | ||
88 | static inline void | |
89 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, | |
90 | enum dma_data_direction direction) | |
91 | { | |
92 | BUG_ON(direction == DMA_NONE); | |
93 | } | |
94 | ||
95 | static inline void | |
96 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, | |
97 | enum dma_data_direction direction) | |
98 | { | |
99 | consistent_sync((void *)bus_to_virt(dma_handle), size, direction); | |
100 | } | |
101 | ||
102 | static inline void | |
c4c4594b CZ |
103 | dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, |
104 | size_t size, enum dma_data_direction direction) | |
9a8fd558 CZ |
105 | { |
106 | consistent_sync((void *)bus_to_virt(dma_handle), size, direction); | |
107 | } | |
108 | ||
109 | static inline void | |
110 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, | |
111 | unsigned long offset, size_t size, | |
112 | enum dma_data_direction direction) | |
113 | { | |
114 | ||
115 | consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction); | |
116 | } | |
117 | ||
118 | static inline void | |
119 | dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, | |
120 | unsigned long offset, size_t size, | |
121 | enum dma_data_direction direction) | |
122 | { | |
123 | ||
124 | consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction); | |
125 | } | |
126 | static inline void | |
127 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, | |
128 | enum dma_data_direction dir) | |
129 | { | |
130 | int i; | |
131 | for (i = 0; i < nelems; i++, sg++) | |
891039a9 | 132 | consistent_sync(sg_virt(sg), sg->length, dir); |
9a8fd558 CZ |
133 | } |
134 | ||
135 | static inline void | |
136 | dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, | |
137 | enum dma_data_direction dir) | |
138 | { | |
139 | int i; | |
140 | for (i = 0; i < nelems; i++, sg++) | |
891039a9 | 141 | consistent_sync(sg_virt(sg), sg->length, dir); |
9a8fd558 CZ |
142 | } |
143 | static inline int | |
8d8bb39b | 144 | dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
9a8fd558 CZ |
145 | { |
146 | return 0; | |
147 | } | |
148 | ||
149 | static inline int | |
150 | dma_supported(struct device *dev, u64 mask) | |
151 | { | |
152 | return 1; | |
153 | } | |
154 | ||
155 | static inline int | |
156 | dma_set_mask(struct device *dev, u64 mask) | |
157 | { | |
158 | if(!dev->dma_mask || !dma_supported(dev, mask)) | |
159 | return -EIO; | |
160 | ||
161 | *dev->dma_mask = mask; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
9a8fd558 | 166 | static inline void |
d3fa72e4 | 167 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
9a8fd558 CZ |
168 | enum dma_data_direction direction) |
169 | { | |
170 | consistent_sync(vaddr, size, direction); | |
171 | } | |
172 | ||
da57b936 GU |
173 | /* Not supported for now */ |
174 | static inline int dma_mmap_coherent(struct device *dev, | |
175 | struct vm_area_struct *vma, void *cpu_addr, | |
176 | dma_addr_t dma_addr, size_t size) | |
177 | { | |
178 | return -EINVAL; | |
179 | } | |
180 | ||
181 | static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt, | |
182 | void *cpu_addr, dma_addr_t dma_addr, | |
183 | size_t size) | |
184 | { | |
185 | return -EINVAL; | |
186 | } | |
187 | ||
9a8fd558 | 188 | #endif /* _XTENSA_DMA_MAPPING_H */ |