1 #ifndef _ASM_S390_DMA_MAPPING_H
2 #define _ASM_S390_DMA_MAPPING_H
4 #include <linux/kernel.h>
5 #include <linux/types.h>
7 #include <linux/scatterlist.h>
8 #include <linux/dma-attrs.h>
9 #include <linux/dma-debug.h>
12 #define DMA_ERROR_CODE (~(dma_addr_t) 0x0)
14 extern struct dma_map_ops s390_dma_ops;
16 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
21 extern int dma_set_mask(struct device *dev, u64 mask);
23 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
24 enum dma_data_direction direction)
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)
31 #include <asm-generic/dma-mapping-common.h>
33 static inline int dma_supported(struct device *dev, u64 mask)
35 struct dma_map_ops *dma_ops = get_dma_ops(dev);
37 if (dma_ops->dma_supported == NULL)
39 return dma_ops->dma_supported(dev, mask);
42 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
46 return addr + size - 1 <= *dev->dma_mask;
49 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
51 struct dma_map_ops *dma_ops = get_dma_ops(dev);
53 debug_dma_mapping_error(dev, dma_addr);
54 if (dma_ops->mapping_error)
55 return dma_ops->mapping_error(dev, dma_addr);
56 return dma_addr == DMA_ERROR_CODE;
59 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
60 dma_addr_t *dma_handle, gfp_t flag)
62 struct dma_map_ops *ops = get_dma_ops(dev);
65 ret = ops->alloc(dev, size, dma_handle, flag, NULL);
66 debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
70 static inline void dma_free_coherent(struct device *dev, size_t size,
71 void *cpu_addr, dma_addr_t dma_handle)
73 struct dma_map_ops *dma_ops = get_dma_ops(dev);
75 debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
76 dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);
79 #endif /* _ASM_S390_DMA_MAPPING_H */