dma-mapping.h File Reference

#include <linux/dma-debug.h>
#include <asm-generic/dma-coherent.h>

Go to the source code of this file.

Macros
#define	dma_supported(d, m)   1
#define	dma_alloc_noncoherent(d, s, h, f)   dma_alloc_coherent((d), (s), (h), (f))
#define	dma_free_noncoherent(d, s, v, h)   dma_free_coherent((d), (s), (v), (h))

Functions
dma_addr_t	dma_map_single (struct device *dev, void *cpu_addr, size_t size, enum dma_data_direction dir)
void	dma_unmap_single (struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir)
int	dma_map_sg (struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction)
void	dma_unmap_sg (struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction)
void	dma_sync_single_for_cpu (struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir)
void	dma_sync_single_for_device (struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir)
void	dma_sync_sg_for_cpu (struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir)
void	dma_sync_sg_for_device (struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir)
void	coherent_mem_init (u32 start, u32 size)
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)

Macro Definition Documentation

#define dma_alloc_noncoherent	(		d,
			s,
			h,
			f
	)		dma_alloc_coherent((d), (s), (h), (f))

Definition at line 88 of file dma-mapping.h.

#define dma_free_noncoherent	(		d,
			s,
			v,
			h
	)		dma_free_coherent((d), (s), (v), (h))

Definition at line 89 of file dma-mapping.h.

#define dma_supported	(		d,
			m
	)		1

Definition at line 18 of file dma-mapping.h.

Function Documentation

void coherent_mem_init	(	u32	start,
		u32	size
	)

Definition at line 119 of file dma-coherent.c.

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.

int dma_map_sg	(	struct device *	dev,
		struct scatterlist *	sglist,
		int	nents,
		enum dma_data_direction	direction
	)

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

dma_addr_t dma_map_single	(	struct device *	dev,
		void *	cpu_addr,
		size_t	size,
		enum dma_data_direction	dir
	)

Definition at line 39 of file dma.c.

void dma_sync_sg_for_cpu	(	struct device *	dev,
		struct scatterlist *	sg,
		int	nents,
		enum dma_data_direction	dir
	)

Definition at line 114 of file dma.c.

void dma_sync_sg_for_device	(	struct device *	dev,
		struct scatterlist *	sg,
		int	nents,
		enum dma_data_direction	dir
	)

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

void dma_sync_single_for_cpu	(	struct device *	dev,
		dma_addr_t	handle,
		size_t	size,
		enum dma_data_direction	dir
	)

Definition at line 94 of file dma.c.

void dma_sync_single_for_device	(	struct device *	dev,
		dma_addr_t	handle,
		size_t	size,
		enum dma_data_direction	dir
	)

Definition at line 104 of file dma.c.

void dma_unmap_sg	(	struct device *	dev,
		struct scatterlist *	sglist,
		int	nents,
		enum dma_data_direction	direction
	)

Definition at line 81 of file dma.c.

void dma_unmap_single	(	struct device *	dev,
		dma_addr_t	handle,
		size_t	size,
		enum dma_data_direction	dir
	)

Definition at line 54 of file dma.c.