iommu.h 951 B

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