#ifndef _NTIOAPI_H

/**
 * The DMA_WIDTH enumeration specifies the width of a DMA transfer.
 */
typedef enum _DMA_WIDTH
{
    Width8Bits,
    Width16Bits,
    Width32Bits,
    Width64Bits,
    WidthNoWrap,
    MaximumDmaWidth
} DMA_WIDTH, *PDMA_WIDTH;

#endif
View code on GitHub