1 files changed, 49 insertions, 0 deletions
diff --git a/include/iommu.h b/include/iommu.h
new file mode 100644
index 00000000000..b8ba0b8e707
--- /dev/null
+++ b/include/iommu.h
@@ -0,0 +1,49 @@
+#ifndef _IOMMU_H
+#define _IOMMU_H
+
+struct udevice;
+
+struct iommu_ops {
+	/**
+	 * init() - Connect a device to it's IOMMU, called before probe()
+	 * The iommu device can be fetched through dev->iommu
+	 *
+	 * @iommu_dev:	IOMMU device
+	 * @dev:	Device to connect
+	 * @return 0 if OK, -errno on error
+	 */
+	int (*connect)(struct udevice *dev);
+	/**
+	 * map() - map DMA memory
+	 *
+	 * @dev:	device for which to map DMA memory
+	 * @addr:	CPU address of the memory
+	 * @size:	size of the memory
+	 * @return DMA address for the device
+	 */
+	dma_addr_t (*map)(struct udevice *dev, void *addr, size_t size);
+
+	/**
+	 * unmap() - unmap DMA memory
+	 *
+	 * @dev:	device for which to unmap DMA memory
+	 * @addr:	DMA address of the memory
+	 * @size:	size of the memory
+	 */
+	void (*unmap)(struct udevice *dev, dma_addr_t addr, size_t size);
+};
+
+#if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) && \
+	CONFIG_IS_ENABLED(IOMMU)
+int dev_iommu_enable(struct udevice *dev);
+#else
+static inline int dev_iommu_enable(struct udevice *dev)
+{
+	return 0;
+}
+#endif
+
+dma_addr_t dev_iommu_dma_map(struct udevice *dev, void *addr, size_t size);
+void dev_iommu_dma_unmap(struct udevice *dev, dma_addr_t addr, size_t size);
+
+#endif