1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef ___ASM_SPARC_DMA_MAPPING_H
 3#define ___ASM_SPARC_DMA_MAPPING_H
 4
 5extern const struct dma_map_ops *dma_ops;
 
 
 6
 7static inline const struct dma_map_ops *get_arch_dma_ops(void)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 8{
 9	/* sparc32 uses per-device dma_ops */
10	return IS_ENABLED(CONFIG_SPARC64) ? dma_ops : NULL;
 
 
 
 
 
 
 
11}
12
13#endif

 
 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
15extern struct dma_map_ops *dma_ops;
16extern struct dma_map_ops *leon_dma_ops;
17extern struct dma_map_ops pci32_dma_ops;
18
19extern struct bus_type pci_bus_type;
20
21static 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
36static 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
50static 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
60static 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
66static 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