| Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame^] | 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); |
| 22 | extern int dma_is_consistent(struct device *dev, dma_addr_t dma_handle); |
| 23 | extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| 24 | enum dma_data_direction direction); |
| 25 | |
| 26 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 27 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
| 28 | |
| 29 | #include <asm-generic/dma-mapping-common.h> |
| 30 | |
| 31 | static inline int dma_supported(struct device *dev, u64 mask) |
| 32 | { |
| 33 | struct dma_map_ops *dma_ops = get_dma_ops(dev); |
| 34 | |
| 35 | if (dma_ops->dma_supported == NULL) |
| 36 | return 1; |
| 37 | return dma_ops->dma_supported(dev, mask); |
| 38 | } |
| 39 | |
| 40 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) |
| 41 | { |
| 42 | if (!dev->dma_mask) |
| 43 | return 0; |
| 44 | return addr + size - 1 <= *dev->dma_mask; |
| 45 | } |
| 46 | |
| 47 | static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
| 48 | { |
| 49 | struct dma_map_ops *dma_ops = get_dma_ops(dev); |
| 50 | |
| 51 | if (dma_ops->mapping_error) |
| 52 | return dma_ops->mapping_error(dev, dma_addr); |
| 53 | return (dma_addr == 0UL); |
| 54 | } |
| 55 | |
| 56 | static inline void *dma_alloc_coherent(struct device *dev, size_t size, |
| 57 | dma_addr_t *dma_handle, gfp_t flag) |
| 58 | { |
| 59 | struct dma_map_ops *ops = get_dma_ops(dev); |
| 60 | void *ret; |
| 61 | |
| 62 | ret = ops->alloc(dev, size, dma_handle, flag, NULL); |
| 63 | debug_dma_alloc_coherent(dev, size, *dma_handle, ret); |
| 64 | return ret; |
| 65 | } |
| 66 | |
| 67 | static inline void dma_free_coherent(struct device *dev, size_t size, |
| 68 | void *cpu_addr, dma_addr_t dma_handle) |
| 69 | { |
| 70 | struct dma_map_ops *dma_ops = get_dma_ops(dev); |
| 71 | |
| 72 | dma_ops->free(dev, size, cpu_addr, dma_handle, NULL); |
| 73 | debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); |
| 74 | } |
| 75 | |
| 76 | #endif /* _ASM_S390_DMA_MAPPING_H */ |