4 * Copyright (C) 2012 Red Hat, Inc. All rights reserved.
5 * Author: Alex Williamson <alex.williamson@redhat.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
15 #include <linux/iommu.h>
17 #include <linux/workqueue.h>
18 #include <linux/poll.h>
19 #include <uapi/linux/vfio.h>
22 * struct vfio_device_ops - VFIO bus driver device callbacks
24 * @open: Called when userspace creates new file descriptor for device
25 * @release: Called when userspace releases file descriptor for device
26 * @read: Perform read(2) on device file descriptor
27 * @write: Perform write(2) on device file descriptor
28 * @ioctl: Perform ioctl(2) on device file descriptor, supporting VFIO_DEVICE_*
29 * operations documented below
30 * @mmap: Perform mmap(2) on a region of the device file descriptor
31 * @request: Request for the bus driver to release the device
33 struct vfio_device_ops
{
35 int (*open
)(void *device_data
);
36 void (*release
)(void *device_data
);
37 ssize_t (*read
)(void *device_data
, char __user
*buf
,
38 size_t count
, loff_t
*ppos
);
39 ssize_t (*write
)(void *device_data
, const char __user
*buf
,
40 size_t count
, loff_t
*size
);
41 long (*ioctl
)(void *device_data
, unsigned int cmd
,
43 int (*mmap
)(void *device_data
, struct vm_area_struct
*vma
);
44 void (*request
)(void *device_data
, unsigned int count
);
47 extern struct iommu_group
*vfio_iommu_group_get(struct device
*dev
);
48 extern void vfio_iommu_group_put(struct iommu_group
*group
, struct device
*dev
);
50 extern int vfio_add_group_dev(struct device
*dev
,
51 const struct vfio_device_ops
*ops
,
54 extern void *vfio_del_group_dev(struct device
*dev
);
55 extern struct vfio_device
*vfio_device_get_from_dev(struct device
*dev
);
56 extern void vfio_device_put(struct vfio_device
*device
);
57 extern void *vfio_device_data(struct vfio_device
*device
);
60 * struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks
62 struct vfio_iommu_driver_ops
{
65 void *(*open
)(unsigned long arg
);
66 void (*release
)(void *iommu_data
);
67 ssize_t (*read
)(void *iommu_data
, char __user
*buf
,
68 size_t count
, loff_t
*ppos
);
69 ssize_t (*write
)(void *iommu_data
, const char __user
*buf
,
70 size_t count
, loff_t
*size
);
71 long (*ioctl
)(void *iommu_data
, unsigned int cmd
,
73 int (*mmap
)(void *iommu_data
, struct vm_area_struct
*vma
);
74 int (*attach_group
)(void *iommu_data
,
75 struct iommu_group
*group
);
76 void (*detach_group
)(void *iommu_data
,
77 struct iommu_group
*group
);
81 extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops
*ops
);
83 extern void vfio_unregister_iommu_driver(
84 const struct vfio_iommu_driver_ops
*ops
);
89 extern struct vfio_group
*vfio_group_get_external_user(struct file
*filep
);
90 extern void vfio_group_put_external_user(struct vfio_group
*group
);
91 extern int vfio_external_user_iommu_id(struct vfio_group
*group
);
92 extern long vfio_external_check_extension(struct vfio_group
*group
,
97 extern void vfio_spapr_pci_eeh_open(struct pci_dev
*pdev
);
98 extern void vfio_spapr_pci_eeh_release(struct pci_dev
*pdev
);
99 extern long vfio_spapr_iommu_eeh_ioctl(struct iommu_group
*group
,
103 static inline void vfio_spapr_pci_eeh_open(struct pci_dev
*pdev
)
107 static inline void vfio_spapr_pci_eeh_release(struct pci_dev
*pdev
)
111 static inline long vfio_spapr_iommu_eeh_ioctl(struct iommu_group
*group
,
117 #endif /* CONFIG_EEH */
124 struct eventfd_ctx
*eventfd
;
125 int (*handler
)(void *, void *);
126 void (*thread
)(void *, void *);
128 struct work_struct inject
;
131 struct work_struct shutdown
;
132 struct virqfd
**pvirqfd
;
135 extern int vfio_virqfd_enable(void *opaque
,
136 int (*handler
)(void *, void *),
137 void (*thread
)(void *, void *),
138 void *data
, struct virqfd
**pvirqfd
, int fd
);
139 extern void vfio_virqfd_disable(struct virqfd
**pvirqfd
);
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