| #ifndef _LINUX_DMA_MAPPING_H | |
| #define _LINUX_DMA_MAPPING_H | |
| #ifdef CONFIG_HAS_DMA | |
| # error Virtio userspace code does not support CONFIG_HAS_DMA | |
| #endif | |
| #define PCI_DMA_BUS_IS_PHYS 1 | |
| enum dma_data_direction { | |
| DMA_BIDIRECTIONAL = 0, | |
| DMA_TO_DEVICE = 1, | |
| DMA_FROM_DEVICE = 2, | |
| DMA_NONE = 3, | |
| }; | |
| #endif |