projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| cba3345c AW |
1 | /* |
| 2 | * VFIO API definition | |
| 3 | * | |
| 4 | * Copyright (C) 2012 Red Hat, Inc. All rights reserved. | |
| 5 | * Author: Alex Williamson <alex.williamson@redhat.com> | |
| 6 | * | |
| 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. | |
| 10 | */ | |
| 11 | #ifndef VFIO_H | |
| 12 | #define VFIO_H | |
| 13 | ||
| cba3345c AW |
14 | |
| 15 | #include <linux/iommu.h> | |
| 16 | #include <linux/mm.h> | |
| 7e992d69 AM |
17 | #include <linux/workqueue.h> |
| 18 | #include <linux/poll.h> | |
| 607ca46e | 19 | #include <uapi/linux/vfio.h> |
| cba3345c AW |
20 | |
| 21 | /** | |
| 22 | * struct vfio_device_ops - VFIO bus driver device callbacks | |
| 23 | * | |
| 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 | |
| 13060b64 | 31 | * @request: Request for the bus driver to release the device |
| cba3345c AW |
32 | */ |
| 33 | struct vfio_device_ops { | |
| 34 | char *name; | |
| 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, | |
| 42 | unsigned long arg); | |
| 43 | int (*mmap)(void *device_data, struct vm_area_struct *vma); | |
| 13060b64 | 44 | void (*request)(void *device_data, unsigned int count); |
| cba3345c AW |
45 | }; |
| 46 | ||
| 47 | extern int vfio_add_group_dev(struct device *dev, | |
| 48 | const struct vfio_device_ops *ops, | |
| 49 | void *device_data); | |
| 50 | ||
| 51 | extern void *vfio_del_group_dev(struct device *dev); | |
| 44f50716 VMP |
52 | extern struct vfio_device *vfio_device_get_from_dev(struct device *dev); |
| 53 | extern void vfio_device_put(struct vfio_device *device); | |
| 54 | extern void *vfio_device_data(struct vfio_device *device); | |
| cba3345c AW |
55 | |
| 56 | /** | |
| 57 | * struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks | |
| 58 | */ | |
| 59 | struct vfio_iommu_driver_ops { | |
| 60 | char *name; | |
| 61 | struct module *owner; | |
| 62 | void *(*open)(unsigned long arg); | |
| 63 | void (*release)(void *iommu_data); | |
| 64 | ssize_t (*read)(void *iommu_data, char __user *buf, | |
| 65 | size_t count, loff_t *ppos); | |
| 66 | ssize_t (*write)(void *iommu_data, const char __user *buf, | |
| 67 | size_t count, loff_t *size); | |
| 68 | long (*ioctl)(void *iommu_data, unsigned int cmd, | |
| 69 | unsigned long arg); | |
| 70 | int (*mmap)(void *iommu_data, struct vm_area_struct *vma); | |
| 71 | int (*attach_group)(void *iommu_data, | |
| 72 | struct iommu_group *group); | |
| 73 | void (*detach_group)(void *iommu_data, | |
| 74 | struct iommu_group *group); | |
| 75 | ||
| 76 | }; | |
| 77 | ||
| 78 | extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops); | |
| 79 | ||
| 80 | extern void vfio_unregister_iommu_driver( | |
| 81 | const struct vfio_iommu_driver_ops *ops); | |
| 82 | ||
| 6cdd9782 AK |
83 | /* |
| 84 | * External user API | |
| 85 | */ | |
| 86 | extern struct vfio_group *vfio_group_get_external_user(struct file *filep); | |
| 87 | extern void vfio_group_put_external_user(struct vfio_group *group); | |
| 88 | extern int vfio_external_user_iommu_id(struct vfio_group *group); | |
| 88d7ab89 AW |
89 | extern long vfio_external_check_extension(struct vfio_group *group, |
| 90 | unsigned long arg); | |
| 6cdd9782 | 91 | |
| 92d18a68 | 92 | struct pci_dev; |
| 1b69be5e | 93 | #ifdef CONFIG_EEH |
| 9b936c96 | 94 | extern void vfio_spapr_pci_eeh_open(struct pci_dev *pdev); |
| 1b69be5e GS |
95 | extern void vfio_spapr_pci_eeh_release(struct pci_dev *pdev); |
| 96 | extern long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group, | |
| 97 | unsigned int cmd, | |
| 98 | unsigned long arg); | |
| 99 | #else | |
| 9b936c96 | 100 | static inline void vfio_spapr_pci_eeh_open(struct pci_dev *pdev) |
| 1b69be5e | 101 | { |
| 1b69be5e GS |
102 | } |
| 103 | ||
| 104 | static inline void vfio_spapr_pci_eeh_release(struct pci_dev *pdev) | |
| 105 | { | |
| 106 | } | |
| 107 | ||
| 108 | static inline long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group, | |
| 109 | unsigned int cmd, | |
| 110 | unsigned long arg) | |
| 111 | { | |
| 112 | return -ENOTTY; | |
| 113 | } | |
| 114 | #endif /* CONFIG_EEH */ | |
| 7e992d69 AM |
115 | |
| 116 | /* | |
| 117 | * IRQfd - generic | |
| 118 | */ | |
| 119 | struct virqfd { | |
| 120 | void *opaque; | |
| 121 | struct eventfd_ctx *eventfd; | |
| 122 | int (*handler)(void *, void *); | |
| 123 | void (*thread)(void *, void *); | |
| 124 | void *data; | |
| 125 | struct work_struct inject; | |
| 126 | wait_queue_t wait; | |
| 127 | poll_table pt; | |
| 128 | struct work_struct shutdown; | |
| 129 | struct virqfd **pvirqfd; | |
| 130 | }; | |
| 131 | ||
| 7e992d69 AM |
132 | extern int vfio_virqfd_enable(void *opaque, |
| 133 | int (*handler)(void *, void *), | |
| 134 | void (*thread)(void *, void *), | |
| 135 | void *data, struct virqfd **pvirqfd, int fd); | |
| 136 | extern void vfio_virqfd_disable(struct virqfd **pvirqfd); | |
| 137 | ||
| cba3345c | 138 | #endif /* VFIO_H */ |