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 15 extern struct dma_map_ops *dma_ops, pci32_dma_ops; 16 extern struct bus_type pci_bus_type; 17 18 static inline struct dma_map_ops *get_dma_ops(struct device *dev) 19 { 20 #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI) 21 if (dev->bus == &pci_bus_type) 22 return &pci32_dma_ops; 23 #endif 24 return dma_ops; 25 } 26 27 #include <asm-generic/dma-mapping-common.h> 28 29 #define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) 30 31 static inline void *dma_alloc_attrs(struct device *dev, size_t size, 32 dma_addr_t *dma_handle, gfp_t flag, 33 struct dma_attrs *attrs) 34 { 35 struct dma_map_ops *ops = get_dma_ops(dev); 36 void *cpu_addr; 37 38 cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs); 39 debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr); 40 return cpu_addr; 41 } 42 43 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) 44 45 static inline void dma_free_attrs(struct device *dev, size_t size, 46 void *cpu_addr, dma_addr_t dma_handle, 47 struct dma_attrs *attrs) 48 { 49 struct dma_map_ops *ops = get_dma_ops(dev); 50 51 debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); 52 ops->free(dev, size, cpu_addr, dma_handle, attrs); 53 } 54 55 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 56 { 57 return (dma_addr == DMA_ERROR_CODE); 58 } 59 60 static inline int dma_set_mask(struct device *dev, u64 mask) 61 { 62 #ifdef CONFIG_PCI 63 if (dev->bus == &pci_bus_type) { 64 if (!dev->dma_mask || !dma_supported(dev, mask)) 65 return -EINVAL; 66 *dev->dma_mask = mask; 67 return 0; 68 } 69 #endif 70 return -EINVAL; 71 } 72 73 #endif 74