1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_DMA_NONCOHERENT_H
#define _LINUX_DMA_NONCOHERENT_H 1
#include <linux/dma-mapping.h>
#ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H
#include <asm/dma-coherence.h>
#elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
static inline bool dev_is_dma_coherent(struct device *dev)
{
return dev->dma_coherent;
}
#else
static inline bool dev_is_dma_coherent(struct device *dev)
{
return true;
}
#endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */
void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t gfp, unsigned long attrs);
void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_addr, unsigned long attrs);
long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
dma_addr_t dma_addr);
#ifdef CONFIG_ARCH_HAS_DMA_MMAP_PGPROT
pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
unsigned long attrs);
#else
# define arch_dma_mmap_pgprot(dev, prot, attrs) pgprot_noncached(prot)
#endif
#ifdef CONFIG_DMA_NONCOHERENT_CACHE_SYNC
void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
#else
#define arch_dma_cache_sync NULL
#endif /* CONFIG_DMA_NONCOHERENT_CACHE_SYNC */
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE
void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
size_t size, enum dma_data_direction dir);
#else
static inline void arch_sync_dma_for_device(struct device *dev,
phys_addr_t paddr, size_t size, enum dma_data_direction dir)
{
}
#endif /* ARCH_HAS_SYNC_DMA_FOR_DEVICE */
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU
void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
size_t size, enum dma_data_direction dir);
#else
static inline void arch_sync_dma_for_cpu(struct device *dev,
phys_addr_t paddr, size_t size, enum dma_data_direction dir)
{
}
#endif /* ARCH_HAS_SYNC_DMA_FOR_CPU */
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
void arch_sync_dma_for_cpu_all(struct device *dev);
#else
static inline void arch_sync_dma_for_cpu_all(struct device *dev)
{
}
#endif /* CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL */
void arch_dma_prep_coherent(struct page *page, size_t size);
#endif /* _LINUX_DMA_NONCOHERENT_H */
|
