vfio.h (2320B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2012 Red Hat, Inc. All rights reserved. 4 * Author: Alex Williamson <alex.williamson@redhat.com> 5 */ 6 7enum vfio_group_type { 8 /* 9 * Physical device with IOMMU backing. 10 */ 11 VFIO_IOMMU, 12 13 /* 14 * Virtual device without IOMMU backing. The VFIO core fakes up an 15 * iommu_group as the iommu_group sysfs interface is part of the 16 * userspace ABI. The user of these devices must not be able to 17 * directly trigger unmediated DMA. 18 */ 19 VFIO_EMULATED_IOMMU, 20 21 /* 22 * Physical device without IOMMU backing. The VFIO core fakes up an 23 * iommu_group as the iommu_group sysfs interface is part of the 24 * userspace ABI. Users can trigger unmediated DMA by the device, 25 * usage is highly dangerous, requires an explicit opt-in and will 26 * taint the kernel. 27 */ 28 VFIO_NO_IOMMU, 29}; 30 31/* events for the backend driver notify callback */ 32enum vfio_iommu_notify_type { 33 VFIO_IOMMU_CONTAINER_CLOSE = 0, 34}; 35 36/** 37 * struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks 38 */ 39struct vfio_iommu_driver_ops { 40 char *name; 41 struct module *owner; 42 void *(*open)(unsigned long arg); 43 void (*release)(void *iommu_data); 44 long (*ioctl)(void *iommu_data, unsigned int cmd, 45 unsigned long arg); 46 int (*attach_group)(void *iommu_data, 47 struct iommu_group *group, 48 enum vfio_group_type); 49 void (*detach_group)(void *iommu_data, 50 struct iommu_group *group); 51 int (*pin_pages)(void *iommu_data, 52 struct iommu_group *group, 53 unsigned long *user_pfn, 54 int npage, int prot, 55 unsigned long *phys_pfn); 56 int (*unpin_pages)(void *iommu_data, 57 unsigned long *user_pfn, int npage); 58 int (*register_notifier)(void *iommu_data, 59 unsigned long *events, 60 struct notifier_block *nb); 61 int (*unregister_notifier)(void *iommu_data, 62 struct notifier_block *nb); 63 int (*dma_rw)(void *iommu_data, dma_addr_t user_iova, 64 void *data, size_t count, bool write); 65 struct iommu_domain *(*group_iommu_domain)(void *iommu_data, 66 struct iommu_group *group); 67 void (*notify)(void *iommu_data, 68 enum vfio_iommu_notify_type event); 69}; 70 71int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops); 72void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);