diff options
Diffstat (limited to 'include/linux/dma-direction.h')
| -rw-r--r-- | include/linux/dma-direction.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/include/linux/dma-direction.h b/include/linux/dma-direction.h index 95b6a82f5951..a2fe4571bc92 100644 --- a/include/linux/dma-direction.h +++ b/include/linux/dma-direction.h @@ -1,13 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_DMA_DIRECTION_H #define _LINUX_DMA_DIRECTION_H -/* - * These definitions mirror those in pci.h, so they can be used - * interchangeably with their PCI_ counterparts. - */ + enum dma_data_direction { DMA_BIDIRECTIONAL = 0, DMA_TO_DEVICE = 1, DMA_FROM_DEVICE = 2, DMA_NONE = 3, }; -#endif + +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 */ |