1#ifndef _LINUX_DMA_DIRECTION_H 2#define _LINUX_DMA_DIRECTION_H 3/* 4 * These definitions mirror those in pci.h, so they can be used 5 * interchangeably with their PCI_ counterparts. 6 */ 7enum dma_data_direction { 8 DMA_BIDIRECTIONAL = 0, 9 DMA_TO_DEVICE = 1, 10 DMA_FROM_DEVICE = 2, 11 DMA_NONE = 3, 12}; 13#endif 14