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