tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_DMA_MAPPING_H
2#define _ASM_DMA_MAPPING_H
3
4#include <asm/scatterlist.h>
5#include <asm/dma-coherence.h>
6#include <asm/cache.h>
7#include <asm-generic/dma-coherent.h>
8
9#ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
10#include <dma-coherence.h>
11#endif
12
13extern struct dma_map_ops *mips_dma_map_ops;
14
15static inline struct dma_map_ops *get_dma_ops(struct device *dev)
16{
17 if (dev && dev->archdata.dma_ops)
18 return dev->archdata.dma_ops;
19 else
20 return mips_dma_map_ops;
21}
22
23static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
24{
25 if (!dev->dma_mask)
26 return 0;
27
28 return addr + size <= *dev->dma_mask;
29}
30
31static inline void dma_mark_clean(void *addr, size_t size) {}
32
33#include <asm-generic/dma-mapping-common.h>
34
35static inline int dma_supported(struct device *dev, u64 mask)
36{
37 struct dma_map_ops *ops = get_dma_ops(dev);
38 return ops->dma_supported(dev, mask);
39}
40
41static inline int dma_mapping_error(struct device *dev, u64 mask)
42{
43 struct dma_map_ops *ops = get_dma_ops(dev);
44
45 debug_dma_mapping_error(dev, mask);
46 return ops->mapping_error(dev, mask);
47}
48
49static inline int
50dma_set_mask(struct device *dev, u64 mask)
51{
52 struct dma_map_ops *ops = get_dma_ops(dev);
53
54 if(!dev->dma_mask || !dma_supported(dev, mask))
55 return -EIO;
56
57 if (ops->set_dma_mask)
58 return ops->set_dma_mask(dev, mask);
59
60 *dev->dma_mask = mask;
61
62 return 0;
63}
64
65extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
66 enum dma_data_direction direction);
67
68#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
69
70static inline void *dma_alloc_attrs(struct device *dev, size_t size,
71 dma_addr_t *dma_handle, gfp_t gfp,
72 struct dma_attrs *attrs)
73{
74 void *ret;
75 struct dma_map_ops *ops = get_dma_ops(dev);
76
77 ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
78
79 debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
80
81 return ret;
82}
83
84#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
85
86static inline void dma_free_attrs(struct device *dev, size_t size,
87 void *vaddr, dma_addr_t dma_handle,
88 struct dma_attrs *attrs)
89{
90 struct dma_map_ops *ops = get_dma_ops(dev);
91
92 ops->free(dev, size, vaddr, dma_handle, attrs);
93
94 debug_dma_free_coherent(dev, size, vaddr, dma_handle);
95}
96
97
98void *dma_alloc_noncoherent(struct device *dev, size_t size,
99 dma_addr_t *dma_handle, gfp_t flag);
100
101void dma_free_noncoherent(struct device *dev, size_t size,
102 void *vaddr, dma_addr_t dma_handle);
103
104#endif /* _ASM_DMA_MAPPING_H */