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
dev_iommu_ops(struct device * dev)10 static 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
21 void dev_iommu_free(struct device *dev);
22
23 const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode);
24
iommu_fwspec_ops(struct iommu_fwspec * fwspec)25 static 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
30 void iommu_fwspec_free(struct device *dev);
31
32 int 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);
36 void iommu_device_unregister_bus(struct iommu_device *iommu,
37 const struct bus_type *bus,
38 struct notifier_block *nb);
39
40 struct iommu_attach_handle *iommu_attach_handle_get(struct iommu_group *group,
41 ioasid_t pasid,
42 unsigned int type);
43 int iommu_attach_group_handle(struct iommu_domain *domain,
44 struct iommu_group *group,
45 struct iommu_attach_handle *handle);
46 void iommu_detach_group_handle(struct iommu_domain *domain,
47 struct iommu_group *group);
48 int iommu_replace_group_handle(struct iommu_group *group,
49 struct iommu_domain *new_domain,
50 struct iommu_attach_handle *handle);
51
52 #if IS_ENABLED(CONFIG_IOMMUFD_DRIVER_CORE) && IS_ENABLED(CONFIG_IRQ_MSI_IOMMU)
53 int iommufd_sw_msi(struct iommu_domain *domain, struct msi_desc *desc,
54 phys_addr_t msi_addr);
55 #else /* !CONFIG_IOMMUFD_DRIVER_CORE || !CONFIG_IRQ_MSI_IOMMU */
iommufd_sw_msi(struct iommu_domain * domain,struct msi_desc * desc,phys_addr_t msi_addr)56 static inline int iommufd_sw_msi(struct iommu_domain *domain,
57 struct msi_desc *desc, phys_addr_t msi_addr)
58 {
59 return -EOPNOTSUPP;
60 }
61 #endif /* CONFIG_IOMMUFD_DRIVER_CORE && CONFIG_IRQ_MSI_IOMMU */
62
63 int iommu_replace_device_pasid(struct iommu_domain *domain,
64 struct device *dev, ioasid_t pasid,
65 struct iommu_attach_handle *handle);
66 #endif /* __LINUX_IOMMU_PRIV_H */
67