projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |