1#ifndef _IOMMU_H
2#define _IOMMU_H
3
4struct udevice;
5
6struct iommu_ops {
7	/**
8	 * init() - Connect a device to it's IOMMU, called before probe()
9	 * The iommu device can be fetched through dev->iommu
10	 *
11	 * @iommu_dev:	IOMMU device
12	 * @dev:	Device to connect
13	 * @return 0 if OK, -errno on error
14	 */
15	int (*connect)(struct udevice *dev);
16	/**
17	 * map() - map DMA memory
18	 *
19	 * @dev:	device for which to map DMA memory
20	 * @addr:	CPU address of the memory
21	 * @size:	size of the memory
22	 * @return DMA address for the device
23	 */
24	dma_addr_t (*map)(struct udevice *dev, void *addr, size_t size);
25
26	/**
27	 * unmap() - unmap DMA memory
28	 *
29	 * @dev:	device for which to unmap DMA memory
30	 * @addr:	DMA address of the memory
31	 * @size:	size of the memory
32	 */
33	void (*unmap)(struct udevice *dev, dma_addr_t addr, size_t size);
34};
35
36#if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) && \
37	CONFIG_IS_ENABLED(IOMMU)
38int dev_iommu_enable(struct udevice *dev);
39#else
40static inline int dev_iommu_enable(struct udevice *dev)
41{
42	return 0;
43}
44#endif
45
46dma_addr_t dev_iommu_dma_map(struct udevice *dev, void *addr, size_t size);
47void dev_iommu_dma_unmap(struct udevice *dev, dma_addr_t addr, size_t size);
48
49#endif
50