#ifndef _LINUX_DMA_DIRECTION_H#define _LINUX_DMA_DIRECTION_H/* * These definitions mirror those in pci.h, so they can be used * interchangeably with their PCI_ counterparts. */enumdma_data_direction{DMA_BIDIRECTIONAL=0,DMA_TO_DEVICE=1,DMA_FROM_DEVICE=2,DMA_NONE=3,};#endif