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  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.  */
  7. enum 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.