projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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) | |
| 45 | return 0; | |
| 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 */ |