134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2012 Red Hat, Inc. All rights reserved.
|
|
* Author: Alex Williamson <alex.williamson@redhat.com>
|
|
*/
|
|
#ifndef __VFIO_VFIO_H__
|
|
#define __VFIO_VFIO_H__
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/cdev.h>
|
|
#include <linux/module.h>
|
|
|
|
struct iommu_group;
|
|
struct vfio_device;
|
|
struct vfio_container;
|
|
|
|
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,
|
|
};
|
|
|
|
struct vfio_group {
|
|
struct device dev;
|
|
struct cdev cdev;
|
|
/*
|
|
* When drivers is non-zero a driver is attached to the struct device
|
|
* that provided the iommu_group and thus the iommu_group is a valid
|
|
* pointer. When drivers is 0 the driver is being detached. Once users
|
|
* reaches 0 then the iommu_group is invalid.
|
|
*/
|
|
refcount_t drivers;
|
|
unsigned int container_users;
|
|
struct iommu_group *iommu_group;
|
|
struct vfio_container *container;
|
|
struct list_head device_list;
|
|
struct mutex device_lock;
|
|
struct list_head vfio_next;
|
|
struct list_head container_next;
|
|
enum vfio_group_type type;
|
|
struct mutex group_lock;
|
|
struct kvm *kvm;
|
|
struct file *opened_file;
|
|
struct blocking_notifier_head notifier;
|
|
};
|
|
|
|
/* 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);
|
|
};
|
|
|
|
struct vfio_iommu_driver {
|
|
const struct vfio_iommu_driver_ops *ops;
|
|
struct list_head vfio_next;
|
|
};
|
|
|
|
int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
|
|
void vfio_unregister_iommu_driver(const struct vfio_iommu_driver_ops *ops);
|
|
|
|
bool vfio_assert_device_open(struct vfio_device *device);
|
|
|
|
struct vfio_container *vfio_container_from_file(struct file *filep);
|
|
int vfio_device_assign_container(struct vfio_device *device);
|
|
void vfio_device_unassign_container(struct vfio_device *device);
|
|
int vfio_container_attach_group(struct vfio_container *container,
|
|
struct vfio_group *group);
|
|
void vfio_group_detach_container(struct vfio_group *group);
|
|
void vfio_device_container_register(struct vfio_device *device);
|
|
void vfio_device_container_unregister(struct vfio_device *device);
|
|
long vfio_container_ioctl_check_extension(struct vfio_container *container,
|
|
unsigned long arg);
|
|
int __init vfio_container_init(void);
|
|
void vfio_container_cleanup(void);
|
|
|
|
#ifdef CONFIG_VFIO_NOIOMMU
|
|
extern bool vfio_noiommu __read_mostly;
|
|
#else
|
|
enum { vfio_noiommu = false };
|
|
#endif
|
|
|
|
#endif
|