vfio.h

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/*
 * VFIO API definition
 *
 * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
 *     Author: Alex Williamson <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef VFIO_H
#define VFIO_H


#include <linux/iommu.h>
#include <linux/mm.h>
#include <uapi/linux/vfio.h>

struct vfio_device_ops {
    char    *name;
    int (*open)(void *device_data);
    void    (*release)(void *device_data);
    ssize_t (*read)(void *device_data, char __user *buf,
            size_t count, loff_t *ppos);
    ssize_t (*write)(void *device_data, const char __user *buf,
             size_t count, loff_t *size);
    long    (*ioctl)(void *device_data, unsigned int cmd,
             unsigned long arg);
    int (*mmap)(void *device_data, struct vm_area_struct *vma);
};

extern int vfio_add_group_dev(struct device *dev,
                  const struct vfio_device_ops *ops,
                  void *device_data);

extern void *vfio_del_group_dev(struct device *dev);

struct vfio_iommu_driver_ops {
    char        *name;
    struct module   *owner;
    void        *(*open)(unsigned long arg);
    void        (*release)(void *iommu_data);
    ssize_t     (*read)(void *iommu_data, char __user *buf,
                size_t count, loff_t *ppos);
    ssize_t     (*write)(void *iommu_data, const char __user *buf,
                 size_t count, loff_t *size);
    long        (*ioctl)(void *iommu_data, unsigned int cmd,
                 unsigned long arg);
    int     (*mmap)(void *iommu_data, struct vm_area_struct *vma);
    int     (*attach_group)(void *iommu_data,
                    struct iommu_group *group);
    void        (*detach_group)(void *iommu_data,
                    struct iommu_group *group);

};

extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);

extern void vfio_unregister_iommu_driver(
                const struct vfio_iommu_driver_ops *ops);

#define offsetofend(TYPE, MEMBER) ({                \
    TYPE tmp;                       \
    offsetof(TYPE, MEMBER) + sizeof(tmp.MEMBER); })     \

#endif /* VFIO_H */