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