https://github.com/torvalds/linux
Raw File
Tip revision: d434405aaab7d0ebc516b68a8fc4100922d7f5ef authored by Linus Torvalds on 11 April 2021, 22:16:13 UTC
Linux 5.12-rc7
Tip revision: d434405
dma-direction.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_DMA_DIRECTION_H
#define _LINUX_DMA_DIRECTION_H

enum dma_data_direction {
	DMA_BIDIRECTIONAL = 0,
	DMA_TO_DEVICE = 1,
	DMA_FROM_DEVICE = 2,
	DMA_NONE = 3,
};

static inline int valid_dma_direction(enum dma_data_direction dir)
{
	return dir == DMA_BIDIRECTIONAL || dir == DMA_TO_DEVICE ||
		dir == DMA_FROM_DEVICE;
}

#endif /* _LINUX_DMA_DIRECTION_H */
back to top