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782e6769 CH |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_DMA_NONCOHERENT_H | |
3 | #define _LINUX_DMA_NONCOHERENT_H 1 | |
4 | ||
5 | #include <linux/dma-mapping.h> | |
6 | ||
f3ecc0ff CH |
7 | #ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H |
8 | #include <asm/dma-coherence.h> | |
9 | #elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ | |
10 | defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ | |
11 | defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) | |
12 | static inline bool dev_is_dma_coherent(struct device *dev) | |
13 | { | |
14 | return dev->dma_coherent; | |
15 | } | |
16 | #else | |
17 | static inline bool dev_is_dma_coherent(struct device *dev) | |
18 | { | |
19 | return true; | |
20 | } | |
21 | #endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */ | |
22 | ||
782e6769 CH |
23 | void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, |
24 | gfp_t gfp, unsigned long attrs); | |
25 | void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, | |
26 | dma_addr_t dma_addr, unsigned long attrs); | |
58b04406 CH |
27 | long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr, |
28 | dma_addr_t dma_addr); | |
29 | ||
30 | #ifdef CONFIG_ARCH_HAS_DMA_MMAP_PGPROT | |
31 | pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot, | |
782e6769 | 32 | unsigned long attrs); |
58b04406 CH |
33 | #else |
34 | # define arch_dma_mmap_pgprot(dev, prot, attrs) pgprot_noncached(prot) | |
35 | #endif | |
782e6769 CH |
36 | |
37 | #ifdef CONFIG_DMA_NONCOHERENT_CACHE_SYNC | |
38 | void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size, | |
39 | enum dma_data_direction direction); | |
40 | #else | |
41 | #define arch_dma_cache_sync NULL | |
42 | #endif /* CONFIG_DMA_NONCOHERENT_CACHE_SYNC */ | |
43 | ||
44 | #ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE | |
45 | void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, | |
46 | size_t size, enum dma_data_direction dir); | |
47 | #else | |
48 | static inline void arch_sync_dma_for_device(struct device *dev, | |
49 | phys_addr_t paddr, size_t size, enum dma_data_direction dir) | |
50 | { | |
51 | } | |
52 | #endif /* ARCH_HAS_SYNC_DMA_FOR_DEVICE */ | |
53 | ||
54 | #ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU | |
55 | void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, | |
56 | size_t size, enum dma_data_direction dir); | |
57 | #else | |
58 | static inline void arch_sync_dma_for_cpu(struct device *dev, | |
59 | phys_addr_t paddr, size_t size, enum dma_data_direction dir) | |
60 | { | |
61 | } | |
62 | #endif /* ARCH_HAS_SYNC_DMA_FOR_CPU */ | |
63 | ||
faef8772 CH |
64 | #ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL |
65 | void arch_sync_dma_for_cpu_all(struct device *dev); | |
66 | #else | |
67 | static inline void arch_sync_dma_for_cpu_all(struct device *dev) | |
68 | { | |
69 | } | |
70 | #endif /* CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL */ | |
71 | ||
782e6769 | 72 | #endif /* _LINUX_DMA_NONCOHERENT_H */ |