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 static inline void *dma_alloc_coherent(struct device *dev, size_t size, 30 dma_addr_t *dma_handle, gfp_t flag) 31 { 32 struct dma_map_ops *ops = get_dma_ops(dev); 33 void *cpu_addr; 34 35 cpu_addr = ops->alloc_coherent(dev, size, dma_handle, flag); 36 debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr); 37 return cpu_addr; 38 } 39 40 static inline void dma_free_coherent(struct device *dev, size_t size, 41 void *cpu_addr, dma_addr_t dma_handle) 42 { 43 struct dma_map_ops *ops = get_dma_ops(dev); 44 45 debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); 46 ops->free_coherent(dev, size, cpu_addr, dma_handle); 47 } 48 49 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 50 { 51 return (dma_addr == DMA_ERROR_CODE); 52 } 53 54 static inline int dma_set_mask(struct device *dev, u64 mask) 55 { 56 #ifdef CONFIG_PCI 57 if (dev->bus == &pci_bus_type) { 58 if (!dev->dma_mask || !dma_supported(dev, mask)) 59 return -EINVAL; 60 *dev->dma_mask = mask; 61 return 0; 62 } 63 #endif 64 return -EINVAL; 65 } 66 67 #endif 68