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 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