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1 | /* |
2 | * Copyright 2010 Tilera Corporation. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation, version 2. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
11 | * NON INFRINGEMENT. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | ||
15 | #ifndef _ASM_TILE_DMA_MAPPING_H | |
16 | #define _ASM_TILE_DMA_MAPPING_H | |
17 | ||
18 | #include <linux/mm.h> | |
19 | #include <linux/scatterlist.h> | |
20 | #include <linux/cache.h> | |
21 | #include <linux/io.h> | |
22 | ||
23 | /* | |
24 | * Note that on x86 and powerpc, there is a "struct dma_mapping_ops" | |
25 | * that is used for all the DMA operations. For now, we don't have an | |
26 | * equivalent on tile, because we only have a single way of doing DMA. | |
27 | * (Tilera bug 7994 to use dma_mapping_ops.) | |
28 | */ | |
29 | ||
30 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) | |
31 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
32 | ||
33 | extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, | |
34 | enum dma_data_direction); | |
35 | extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, | |
36 | size_t size, enum dma_data_direction); | |
37 | extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, | |
38 | enum dma_data_direction); | |
39 | extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg, | |
40 | int nhwentries, enum dma_data_direction); | |
41 | extern dma_addr_t dma_map_page(struct device *dev, struct page *page, | |
42 | unsigned long offset, size_t size, | |
43 | enum dma_data_direction); | |
44 | extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address, | |
45 | size_t size, enum dma_data_direction); | |
46 | extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, | |
47 | int nelems, enum dma_data_direction); | |
48 | extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, | |
49 | int nelems, enum dma_data_direction); | |
50 | ||
51 | ||
52 | void *dma_alloc_coherent(struct device *dev, size_t size, | |
53 | dma_addr_t *dma_handle, gfp_t flag); | |
54 | ||
55 | void dma_free_coherent(struct device *dev, size_t size, | |
56 | void *vaddr, dma_addr_t dma_handle); | |
57 | ||
58 | extern void dma_sync_single_for_cpu(struct device *, dma_addr_t, size_t, | |
59 | enum dma_data_direction); | |
60 | extern void dma_sync_single_for_device(struct device *, dma_addr_t, | |
61 | size_t, enum dma_data_direction); | |
62 | extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t, | |
63 | unsigned long offset, size_t, | |
64 | enum dma_data_direction); | |
65 | extern void dma_sync_single_range_for_device(struct device *, dma_addr_t, | |
66 | unsigned long offset, size_t, | |
67 | enum dma_data_direction); | |
68 | extern void dma_cache_sync(void *vaddr, size_t, enum dma_data_direction); | |
69 | ||
70 | static inline int | |
71 | dma_mapping_error(struct device *dev, dma_addr_t dma_addr) | |
72 | { | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static inline int | |
77 | dma_supported(struct device *dev, u64 mask) | |
78 | { | |
79 | return 1; | |
80 | } | |
81 | ||
82 | static inline int | |
83 | dma_set_mask(struct device *dev, u64 mask) | |
84 | { | |
85 | if (!dev->dma_mask || !dma_supported(dev, mask)) | |
86 | return -EIO; | |
87 | ||
88 | *dev->dma_mask = mask; | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
867e359b CM |
93 | #define dma_is_consistent(d, h) (1) |
94 | ||
867e359b | 95 | #endif /* _ASM_TILE_DMA_MAPPING_H */ |