1 #ifndef _IOMMU_H
2 #define _IOMMU_H
3 
4 struct udevice;
5 
6 struct iommu_ops {
7 	/**
8 	 * map() - map DMA memory
9 	 *
10 	 * @dev:	device for which to map DMA memory
11 	 * @addr:	CPU address of the memory
12 	 * @size:	size of the memory
13 	 * @return DMA address for the device
14 	 */
15 	dma_addr_t (*map)(struct udevice *dev, void *addr, size_t size);
16 
17 	/**
18 	 * unmap() - unmap DMA memory
19 	 *
20 	 * @dev:	device for which to unmap DMA memory
21 	 * @addr:	DMA address of the memory
22 	 * @size:	size of the memory
23 	 */
24 	void (*unmap)(struct udevice *dev, dma_addr_t addr, size_t size);
25 };
26 
27 #if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) && \
28 	CONFIG_IS_ENABLED(IOMMU)
29 int dev_iommu_enable(struct udevice *dev);
30 #else
dev_iommu_enable(struct udevice * dev)31 static inline int dev_iommu_enable(struct udevice *dev)
32 {
33 	return 0;
34 }
35 #endif
36 
37 dma_addr_t dev_iommu_dma_map(struct udevice *dev, void *addr, size_t size);
38 void dev_iommu_dma_unmap(struct udevice *dev, dma_addr_t addr, size_t size);
39 
40 #endif
41