/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012 Red Hat, Inc. All rights reserved. * Author: Alex Williamson <alex.williamson@redhat.com> */ enum vfio_group_type { /* * Physical device with IOMMU backing. */ VFIO_IOMMU, /* * Virtual device without IOMMU backing. The VFIO core fakes up an * iommu_group as the iommu_group sysfs interface is part of the * userspace ABI. The user of these devices must not be able to * directly trigger unmediated DMA. */ VFIO_EMULATED_IOMMU, /* * Physical device without IOMMU backing. The VFIO core fakes up an * iommu_group as the iommu_group sysfs interface is part of the * userspace ABI. Users can trigger unmediated DMA by the device, * usage is highly dangerous, requires an explicit opt-in and will * taint the kernel. */ VFIO_NO_IOMMU, }; /* events for the backend driver notify callback */ enum vfio_iommu_notify_type { VFIO_IOMMU_CONTAINER_CLOSE = 0, }; /** * struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks */ struct vfio_iommu_driver_ops { char *name; struct module *owner; void *(*open)(unsigned long arg); void (*release)(void *iommu_data); long (*ioctl)(void *iommu_data, unsigned int cmd, unsigned long arg); int (*attach_group)(void *iommu_data, struct iommu_group *group, enum vfio_group_type); void (*detach_group)(void *iommu_data, struct iommu_group *group); int (*pin_pages)(void *iommu_data, struct iommu_group *group, dma_addr_t user_iova, int npage, int prot, struct page **pages); void (*unpin_pages)(void *iommu_data, dma_addr_t user_iova, int npage); void (*register_device)(void *iommu_data, struct vfio_device *vdev); void (*unregister_device)(void *iommu_data, struct vfio_device *vdev); int (*dma_rw)(void *iommu_data, dma_addr_t user_iova, void *data, size_t count, bool write); struct iommu_domain *(*group_iommu_domain)(void *iommu_data, struct iommu_group *group); void (*notify)(void *iommu_data, enum vfio_iommu_notify_type event); }; int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops); void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);