dma-mapping.h revision 4565f0170dfc849b3629c27d769db800467baa62 
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
10extern 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#define dma_is_consistent(d, h)	(1)
15
16extern struct dma_map_ops *dma_ops, pci32_dma_ops;
17extern struct bus_type pci_bus_type;
18
19static inline struct dma_map_ops *get_dma_ops(struct device *dev)
20{
21#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
22	if (dev->bus == &pci_bus_type)
23		return &pci32_dma_ops;
24#endif
25	return dma_ops;
26}
27
28#include <asm-generic/dma-mapping-common.h>
29
30static inline void *dma_alloc_coherent(struct device *dev, size_t size,
31				       dma_addr_t *dma_handle, gfp_t flag)
32{
33	struct dma_map_ops *ops = get_dma_ops(dev);
34	void *cpu_addr;
35
36	cpu_addr = ops->alloc_coherent(dev, size, dma_handle, flag);
37	debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
38	return cpu_addr;
39}
40
41static inline void dma_free_coherent(struct device *dev, size_t size,
42				     void *cpu_addr, dma_addr_t dma_handle)
43{
44	struct dma_map_ops *ops = get_dma_ops(dev);
45
46	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
47	ops->free_coherent(dev, size, cpu_addr, dma_handle);
48}
49
50static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
51{
52	return (dma_addr == DMA_ERROR_CODE);
53}
54
55static inline int dma_set_mask(struct device *dev, u64 mask)
56{
57#ifdef CONFIG_PCI
58	if (dev->bus == &pci_bus_type) {
59		if (!dev->dma_mask || !dma_supported(dev, mask))
60			return -EINVAL;
61		*dev->dma_mask = mask;
62		return 0;
63	}
64#endif
65	return -EINVAL;
66}
67
68#endif
69