Current File : //usr/src/kernels/3.10.0-1160.81.1.el7.centos.plus.x86_64/include/asm-generic/dma.h
#ifndef __ASM_GENERIC_DMA_H
#define __ASM_GENERIC_DMA_H
/*
* This file traditionally describes the i8237 PC style DMA controller.
* Most architectures don't have these any more and can get the minimal
* implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS.
*
* Some code relies on seeing MAX_DMA_ADDRESS though.
*/
#define MAX_DMA_ADDRESS PAGE_OFFSET
extern int request_dma(unsigned int dmanr, const char *device_id);
extern void free_dma(unsigned int dmanr);
#endif /* __ASM_GENERIC_DMA_H */
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