mirror of
https://github.com/torvalds/linux.git
synced 2024-11-02 10:11:36 +00:00
33 lines
891 B
C
33 lines
891 B
C
|
#ifndef DMA_COHERENT_H
|
||
|
|
#define DMA_COHERENT_H
|
||
|
|
|
||
|
|
#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
|
||
|
|
/*
|
||
|
|
* These two functions are only for dma allocator.
|
||
|
|
* Don't use them in device drivers.
|
||
|
|
*/
|
||
|
|
int dma_alloc_from_coherent(struct device *dev, ssize_t size,
|
||
|
|
dma_addr_t *dma_handle, void **ret);
|
||
|
|
int dma_release_from_coherent(struct device *dev, int order, void *vaddr);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Standard interface
|
||
|
|
*/
|
||
|
|
#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
|
||
|
|
extern int
|
||
|
|
dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
|
||
|
|
dma_addr_t device_addr, size_t size, int flags);
|
||
|
|
|
||
|
|
extern void
|
||
|
|
dma_release_declared_memory(struct device *dev);
|
||
|
|
|
||
|
|
extern void *
|
||
|
|
dma_mark_declared_memory_occupied(struct device *dev,
|
||
|
|
dma_addr_t device_addr, size_t size);
|
||
|
|
#else
|
||
|
|
#define dma_alloc_from_coherent(dev, size, handle, ret) (0)
|
||
|
|
#define dma_release_from_coherent(dev, order, vaddr) (0)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|