iommu-priv.h

 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#include <linux/msi.h>
 9
10static inline const struct iommu_ops *dev_iommu_ops(struct device *dev)
11{
12	/*
13	 * Assume that valid ops must be installed if iommu_probe_device()
14	 * has succeeded. The device ops are essentially for internal use
15	 * within the IOMMU subsystem itself, so we should be able to trust
16	 * ourselves not to misuse the helper.
17	 */
18	return dev->iommu->iommu_dev->ops;
19}
20
21void dev_iommu_free(struct device *dev);
22
23const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode);
24
25static inline const struct iommu_ops *iommu_fwspec_ops(struct iommu_fwspec *fwspec)
26{
27	return iommu_ops_from_fwnode(fwspec ? fwspec->iommu_fwnode : NULL);
28}
29
30void iommu_fwspec_free(struct device *dev);
31
32int iommu_device_register_bus(struct iommu_device *iommu,
33			      const struct iommu_ops *ops,
34			      const struct bus_type *bus,
35			      struct notifier_block *nb);
36void iommu_device_unregister_bus(struct iommu_device *iommu,
37				 const struct bus_type *bus,
38				 struct notifier_block *nb);
39
40int iommu_mock_device_add(struct device *dev, struct iommu_device *iommu);
41
42struct iommu_attach_handle *iommu_attach_handle_get(struct iommu_group *group,
43						    ioasid_t pasid,
44						    unsigned int type);
45int iommu_attach_group_handle(struct iommu_domain *domain,
46			      struct iommu_group *group,
47			      struct iommu_attach_handle *handle);
48void iommu_detach_group_handle(struct iommu_domain *domain,
49			       struct iommu_group *group);
50int iommu_replace_group_handle(struct iommu_group *group,
51			       struct iommu_domain *new_domain,
52			       struct iommu_attach_handle *handle);
53
54#if IS_ENABLED(CONFIG_IOMMUFD_DRIVER_CORE) && IS_ENABLED(CONFIG_IRQ_MSI_IOMMU)
55int iommufd_sw_msi(struct iommu_domain *domain, struct msi_desc *desc,
56		   phys_addr_t msi_addr);
57#else /* !CONFIG_IOMMUFD_DRIVER_CORE || !CONFIG_IRQ_MSI_IOMMU */
58static inline int iommufd_sw_msi(struct iommu_domain *domain,
59				 struct msi_desc *desc, phys_addr_t msi_addr)
60{
61	return -EOPNOTSUPP;
62}
63#endif /* CONFIG_IOMMUFD_DRIVER_CORE && CONFIG_IRQ_MSI_IOMMU */
64
65int iommu_replace_device_pasid(struct iommu_domain *domain,
66			       struct device *dev, ioasid_t pasid,
67			       struct iommu_attach_handle *handle);
68#endif /* __LINUX_IOMMU_PRIV_H */