https://github.com/torvalds/linux
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Tip revision: 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4 authored by Linus Torvalds on 30 July 2023, 20:23:47 UTC
Linux 6.5-rc4
Tip revision: 5d0c230
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 */
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