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