drivers/iommu/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
   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 const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode);
  21
  22 static inline const struct iommu_ops *iommu_fwspec_ops(struct iommu_fwspec *fwspec)
  23 {
  24         return iommu_ops_from_fwnode(fwspec ? fwspec->iommu_fwnode : NULL);
  25 }
  26
  27 int iommu_group_replace_domain(struct iommu_group *group,
  28                                struct iommu_domain *new_domain);
  29
  30 int iommu_device_register_bus(struct iommu_device *iommu,
  31                               const struct iommu_ops *ops,
  32                               const struct bus_type *bus,
  33                               struct notifier_block *nb);
  34 void iommu_device_unregister_bus(struct iommu_device *iommu,
  35                                  const struct bus_type *bus,
  36                                  struct notifier_block *nb);
  37
  38 struct iommu_attach_handle *iommu_attach_handle_get(struct iommu_group *group,
  39                                                     ioasid_t pasid,
  40                                                     unsigned int type);
  41 int iommu_attach_group_handle(struct iommu_domain *domain,
  42                               struct iommu_group *group,
  43                               struct iommu_attach_handle *handle);
  44 void iommu_detach_group_handle(struct iommu_domain *domain,
  45                                struct iommu_group *group);
  46 int iommu_replace_group_handle(struct iommu_group *group,
  47                                struct iommu_domain *new_domain,
  48                                struct iommu_attach_handle *handle);
  49 #endif /* __LINUX_IOMMU_PRIV_H */