https://github.com/torvalds/linux
Raw File
Tip revision: ba155e2d21f6bf05de86a78dbe5bfd8757604a65 authored by Linus Torvalds on 25 May 2015, 01:22:35 UTC
Linux 4.1-rc5
Tip revision: ba155e2
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 */
back to top