1 #ifndef ___ASM_SPARC_DMA_MAPPING_H 2 #define ___ASM_SPARC_DMA_MAPPING_H 3 4 #include <linux/scatterlist.h> 5 #include <linux/mm.h> 6 #include <linux/dma-debug.h> 7 8 #define DMA_ERROR_CODE (~(dma_addr_t)0x0) 9 10 extern int dma_supported(struct device *dev, u64 mask); 11 12 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) 13 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) 14 #define dma_is_consistent(d, h) (1) 15 16 extern struct dma_map_ops *dma_ops, pci32_dma_ops; 17 extern struct bus_type pci_bus_type; 18 19 static inline struct dma_map_ops *get_dma_ops(struct device *dev) 20 { 21 #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI) 22 if (dev->bus == &pci_bus_type) 23 return &pci32_dma_ops; 24 #endif 25 return dma_ops; 26 } 27 28 #include <asm-generic/dma-mapping-common.h> 29 30 static inline void *dma_alloc_coherent(struct device *dev, size_t size, 31 dma_addr_t *dma_handle, gfp_t flag) 32 { 33 struct dma_map_ops *ops = get_dma_ops(dev); 34 void *cpu_addr; 35 36 cpu_addr = ops->alloc_coherent(dev, size, dma_handle, flag); 37 debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr); 38 return cpu_addr; 39 } 40 41 static inline void dma_free_coherent(struct device *dev, size_t size, 42 void *cpu_addr, dma_addr_t dma_handle) 43 { 44 struct dma_map_ops *ops = get_dma_ops(dev); 45 46 debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); 47 ops->free_coherent(dev, size, cpu_addr, dma_handle); 48 } 49 50 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 51 { 52 return (dma_addr == DMA_ERROR_CODE); 53 } 54 55 static inline int dma_get_cache_alignment(void) 56 { 57 /* 58 * no easy way to get cache size on all processors, so return 59 * the maximum possible, to be safe 60 */ 61 return (1 << INTERNODE_CACHE_SHIFT); 62 } 63 64 static inline int dma_set_mask(struct device *dev, u64 mask) 65 { 66 #ifdef CONFIG_PCI 67 if (dev->bus == &pci_bus_type) { 68 if (!dev->dma_mask || !dma_supported(dev, mask)) 69 return -EINVAL; 70 *dev->dma_mask = mask; 71 return 0; 72 } 73 #endif 74 return -EINVAL; 75 } 76 77 #endif 78