1/* SPDX-License-Identifier: GPL-2.0-only */
 2/* Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES.
 3 */
 4#ifndef __LINUX_IOMMU_PRIV_H
 5#define __LINUX_IOMMU_PRIV_H
 6
 7#include <linux/iommu.h>
 8
 9static inline const struct iommu_ops *dev_iommu_ops(struct device *dev)
10{
11	/*
12	 * Assume that valid ops must be installed if iommu_probe_device()
13	 * has succeeded. The device ops are essentially for internal use
14	 * within the IOMMU subsystem itself, so we should be able to trust
15	 * ourselves not to misuse the helper.
16	 */
17	return dev->iommu->iommu_dev->ops;
18}
19
20int iommu_group_replace_domain(struct iommu_group *group,
21			       struct iommu_domain *new_domain);
22
23int iommu_device_register_bus(struct iommu_device *iommu,
24			      const struct iommu_ops *ops,
25			      const struct bus_type *bus,
26			      struct notifier_block *nb);
27void iommu_device_unregister_bus(struct iommu_device *iommu,
28				 const struct bus_type *bus,
29				 struct notifier_block *nb);
30
31#endif /* __LINUX_IOMMU_PRIV_H */