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 
dev_iommu_ops(struct device * dev)9 static 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 
20 int iommu_group_replace_domain(struct iommu_group *group,
21 			       struct iommu_domain *new_domain);
22 
23 int iommu_device_register_bus(struct iommu_device *iommu,
24 			      const struct iommu_ops *ops, struct bus_type *bus,
25 			      struct notifier_block *nb);
26 void iommu_device_unregister_bus(struct iommu_device *iommu,
27 				 struct bus_type *bus,
28 				 struct notifier_block *nb);
29 
30 #endif /* __LINUX_IOMMU_PRIV_H */
31