dma-mapping.h File Reference

#include <asm/cache.h>

Go to the source code of this file.

Functions
void *	dma_alloc_coherent (struct device *, size_t, dma_addr_t *, gfp_t)
void	dma_free_coherent (struct device *, size_t, void *, dma_addr_t)
dma_addr_t	dma_map_single (struct device *, void *, size_t, enum dma_data_direction)
dma_addr_t	dma_map_page (struct device *, struct page *, unsigned long, size_t size, enum dma_data_direction)
int	dma_map_sg (struct device *, struct scatterlist *, int, enum dma_data_direction)
void	dma_sync_single_for_device (struct device *, dma_addr_t, size_t, enum dma_data_direction)
void	dma_sync_sg_for_device (struct device *, struct scatterlist *, int, enum dma_data_direction)

Function Documentation

void* dma_alloc_coherent	(	struct device *	,
		size_t	,
		dma_addr_t *	,
		gfp_t
	)

dma_alloc_coherent - allocate consistent memory for DMA : valid struct device pointer, or NULL for ISA and EISA-like devices : required memory size : bus-specific DMA address

Allocate some uncached, unbuffered memory for a device for performing DMA. This function allocates pages, and will return the CPU-viewed address, and sets to be the device-viewed address.

Definition at line 96 of file dma-coherent.c.

void dma_free_coherent	(	struct device *	,
		size_t	,
		void *	,
		dma_addr_t
	)

dma_free_coherent - free memory allocated by dma_alloc_coherent : valid struct device pointer, or NULL for ISA and EISA-like devices : size of memory originally requested in dma_alloc_coherent : CPU-view address returned from dma_alloc_coherent : device-view address returned from dma_alloc_coherent

Free (and unmap) a DMA buffer previously allocated by dma_alloc_coherent().

References to memory and mappings associated with cpu_addr/handle during and after this call executing are illegal.

Definition at line 110 of file dma-coherent.c.

dma_addr_t dma_map_page	(	struct device *	,
		struct page *	,
		unsigned	long,
		size_t	size,
		enum	dma_data_direction
	)

Definition at line 138 of file pci-dma-nommu.c.

int dma_map_sg	(	struct device *	,
		struct scatterlist *	,
		int	,
		enum	dma_data_direction
	)

Definition at line 125 of file dma-mapping.c.

dma_addr_t dma_map_single	(	struct device *	,
		void *	,
		size_t	,
		enum	dma_data_direction
	)

Definition at line 39 of file dma.c.

void dma_sync_sg_for_device	(	struct device *	,
		struct scatterlist *	,
		int	,
		enum	dma_data_direction
	)

Definition at line 140 of file dma-mapping.c.

void dma_sync_single_for_device	(	struct device *	,
		dma_addr_t	,
		size_t	,
		enum	dma_data_direction
	)

Definition at line 104 of file dma.c.