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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#ifdef __tilegx__
24#define ARCH_HAS_DMA_GET_REQUIRED_MASK
25#endif
26
27extern struct dma_map_ops *tile_dma_map_ops;
28extern struct dma_map_ops *gx_pci_dma_map_ops;
29extern struct dma_map_ops *gx_legacy_pci_dma_map_ops;
30extern struct dma_map_ops *gx_hybrid_pci_dma_map_ops;
31
32static inline struct dma_map_ops *get_dma_ops(struct device *dev)
33{
34 if (dev && dev->archdata.dma_ops)
35 return dev->archdata.dma_ops;
36 else
37 return tile_dma_map_ops;
38}
39
40static inline dma_addr_t get_dma_offset(struct device *dev)
41{
42 return dev->archdata.dma_offset;
43}
44
45static inline void set_dma_offset(struct device *dev, dma_addr_t off)
46{
47 dev->archdata.dma_offset = off;
48}
49
50static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
51{
52 return paddr;
53}
54
55static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
56{
57 return daddr;
58}
59
60static inline void dma_mark_clean(void *addr, size_t size) {}
61
62static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
63{
64 dev->archdata.dma_ops = ops;
65}
66
67static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
68{
69 if (!dev->dma_mask)
70 return 0;
71
72 return addr + size - 1 <= *dev->dma_mask;
73}
74
75#define HAVE_ARCH_DMA_SET_MASK 1
76
77#include <asm-generic/dma-mapping-common.h>
78
79static inline int
80dma_set_mask(struct device *dev, u64 mask)
81{
82 struct dma_map_ops *dma_ops = get_dma_ops(dev);
83
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87
88
89
90 if (dma_ops == gx_pci_dma_map_ops ||
91 dma_ops == gx_hybrid_pci_dma_map_ops ||
92 dma_ops == gx_legacy_pci_dma_map_ops) {
93 if (mask == DMA_BIT_MASK(64) &&
94 dma_ops == gx_legacy_pci_dma_map_ops)
95 set_dma_ops(dev, gx_hybrid_pci_dma_map_ops);
96 else if (mask > dev->archdata.max_direct_dma_addr)
97 mask = dev->archdata.max_direct_dma_addr;
98 }
99
100 if (!dev->dma_mask || !dma_supported(dev, mask))
101 return -EIO;
102
103 *dev->dma_mask = mask;
104
105 return 0;
106}
107
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110
111
112static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
113 enum dma_data_direction direction)
114{
115}
116
117#endif
118