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828b35f6 JG |
1 | #ifndef _ASM_S390_DMA_MAPPING_H |
2 | #define _ASM_S390_DMA_MAPPING_H | |
3 | ||
4 | #include <linux/kernel.h> | |
5 | #include <linux/types.h> | |
6 | #include <linux/mm.h> | |
7 | #include <linux/scatterlist.h> | |
8 | #include <linux/dma-attrs.h> | |
9 | #include <linux/dma-debug.h> | |
10 | #include <linux/io.h> | |
11 | ||
12 | #define DMA_ERROR_CODE (~(dma_addr_t) 0x0) | |
13 | ||
14 | extern struct dma_map_ops s390_dma_ops; | |
15 | ||
16 | static inline struct dma_map_ops *get_dma_ops(struct device *dev) | |
17 | { | |
18 | return &s390_dma_ops; | |
19 | } | |
20 | ||
21 | extern int dma_set_mask(struct device *dev, u64 mask); | |
e978948d HC |
22 | |
23 | static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, | |
24 | enum dma_data_direction direction) | |
25 | { | |
26 | } | |
828b35f6 JG |
27 | |
28 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) | |
29 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
30 | ||
31 | #include <asm-generic/dma-mapping-common.h> | |
32 | ||
33 | static inline int dma_supported(struct device *dev, u64 mask) | |
34 | { | |
35 | struct dma_map_ops *dma_ops = get_dma_ops(dev); | |
36 | ||
37 | if (dma_ops->dma_supported == NULL) | |
38 | return 1; | |
39 | return dma_ops->dma_supported(dev, mask); | |
40 | } | |
41 | ||
42 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) | |
43 | { | |
44 | if (!dev->dma_mask) | |
1c6e4b18 | 45 | return false; |
828b35f6 JG |
46 | return addr + size - 1 <= *dev->dma_mask; |
47 | } | |
48 | ||
49 | static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) | |
50 | { | |
51 | struct dma_map_ops *dma_ops = get_dma_ops(dev); | |
52 | ||
4026099a | 53 | debug_dma_mapping_error(dev, dma_addr); |
828b35f6 JG |
54 | if (dma_ops->mapping_error) |
55 | return dma_ops->mapping_error(dev, dma_addr); | |
a9a5250c | 56 | return dma_addr == DMA_ERROR_CODE; |
828b35f6 JG |
57 | } |
58 | ||
90114d65 TR |
59 | #define dma_alloc_coherent(d, s, h, f) dma_alloc_attrs(d, s, h, f, NULL) |
60 | ||
61 | static inline void *dma_alloc_attrs(struct device *dev, size_t size, | |
62 | dma_addr_t *dma_handle, gfp_t flags, | |
63 | struct dma_attrs *attrs) | |
828b35f6 JG |
64 | { |
65 | struct dma_map_ops *ops = get_dma_ops(dev); | |
90114d65 TR |
66 | void *cpu_addr; |
67 | ||
68 | BUG_ON(!ops); | |
828b35f6 | 69 | |
90114d65 TR |
70 | cpu_addr = ops->alloc(dev, size, dma_handle, flags, attrs); |
71 | debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr); | |
72 | ||
73 | return cpu_addr; | |
828b35f6 JG |
74 | } |
75 | ||
90114d65 TR |
76 | #define dma_free_coherent(d, s, c, h) dma_free_attrs(d, s, c, h, NULL) |
77 | ||
78 | static inline void dma_free_attrs(struct device *dev, size_t size, | |
79 | void *cpu_addr, dma_addr_t dma_handle, | |
80 | struct dma_attrs *attrs) | |
828b35f6 | 81 | { |
90114d65 TR |
82 | struct dma_map_ops *ops = get_dma_ops(dev); |
83 | ||
84 | BUG_ON(!ops); | |
828b35f6 | 85 | |
828b35f6 | 86 | debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); |
90114d65 | 87 | ops->free(dev, size, cpu_addr, dma_handle, attrs); |
828b35f6 JG |
88 | } |
89 | ||
90 | #endif /* _ASM_S390_DMA_MAPPING_H */ |