dma-mapping.h File Reference

#include <asm/cache.h>
#include <asm/io.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>

Go to the source code of this file.

Macros
#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
void *	consistent_alloc (int, size_t, dma_addr_t, unsigned long)
void	consistent_free (void *, size_t, dma_addr_t)
void	consistent_sync (void *, size_t, int)
void *	dma_alloc_coherent (struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag)
void	dma_free_coherent (struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle)

Macro Definition Documentation

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

Definition at line 27 of file dma-mapping.h.

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

Definition at line 28 of file dma-mapping.h.

Function Documentation

void* consistent_alloc	(	int	,
		size_t	,
		dma_addr_t	,
		unsigned	long
	)

void consistent_free	(	void *	,
		size_t	,
		dma_addr_t
	)

void consistent_sync	(	void *	,
		size_t	,
		int
	)

Definition at line 151 of file dma-alloc.c.

void* dma_alloc_coherent	(	struct device *	dev,
		size_t	size,
		dma_addr_t *	dma_handle,
		gfp_t	flag
	)

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 *	dev,
		size_t	size,
		void *	vaddr,
		dma_addr_t	dma_handle
	)

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.