#include <linux/types.h>
#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/export.h>
#include <linux/highmem.h>
#include <linux/scatterlist.h>
#include <asm/io.h>
Go to the source code of this file.
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| void * | dma_alloc_coherent (struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t gfp) |
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| | EXPORT_SYMBOL (dma_alloc_coherent) |
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| void | dma_free_coherent (struct device *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle) |
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| | EXPORT_SYMBOL (dma_free_coherent) |
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| dma_addr_t | dma_map_single (struct device *dev, void *ptr, size_t size, enum dma_data_direction direction) |
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| | EXPORT_SYMBOL (dma_map_single) |
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| int | dma_map_sg (struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction) |
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| | EXPORT_SYMBOL (dma_map_sg) |
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| dma_addr_t | dma_map_page (struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction direction) |
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| | EXPORT_SYMBOL (dma_map_page) |
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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 21 of file pci-dma.c.
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 34 of file pci-dma.c.
1.8.2