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 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 15 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, 16 enum dma_data_direction dir) 17 { 18 /* Since dma_{alloc,free}_noncoherent() allocated coherent memory, this 19 * routine can be a nop. 20 */ 21 } 22 23 extern struct dma_map_ops *dma_ops; 24 extern struct dma_map_ops *leon_dma_ops; 25 extern struct dma_map_ops pci32_dma_ops; 26 27 extern struct bus_type pci_bus_type; 28 29 static inline struct dma_map_ops *get_dma_ops(struct device *dev) 30 { 31 #ifdef CONFIG_SPARC_LEON 32 if (sparc_cpu_model == sparc_leon) 33 return leon_dma_ops; 34 #endif 35 #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI) 36 if (dev->bus == &pci_bus_type) 37 return &pci32_dma_ops; 38 #endif 39 return dma_ops; 40 } 41 42 #include <asm-generic/dma-mapping-common.h> 43 44 #define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) 45 46 static inline void *dma_alloc_attrs(struct device *dev, size_t size, 47 dma_addr_t *dma_handle, gfp_t flag, 48 struct dma_attrs *attrs) 49 { 50 struct dma_map_ops *ops = get_dma_ops(dev); 51 void *cpu_addr; 52 53 cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs); 54 debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr); 55 return cpu_addr; 56 } 57 58 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) 59 60 static inline void dma_free_attrs(struct device *dev, size_t size, 61 void *cpu_addr, dma_addr_t dma_handle, 62 struct dma_attrs *attrs) 63 { 64 struct dma_map_ops *ops = get_dma_ops(dev); 65 66 debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); 67 ops->free(dev, size, cpu_addr, dma_handle, attrs); 68 } 69 70 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 71 { 72 debug_dma_mapping_error(dev, dma_addr); 73 return (dma_addr == DMA_ERROR_CODE); 74 } 75 76 static inline int dma_set_mask(struct device *dev, u64 mask) 77 { 78 #ifdef CONFIG_PCI 79 if (dev->bus == &pci_bus_type) { 80 if (!dev->dma_mask || !dma_supported(dev, mask)) 81 return -EINVAL; 82 *dev->dma_mask = mask; 83 return 0; 84 } 85 #endif 86 return -EINVAL; 87 } 88 89 #endif 90