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11#ifndef VFIO_H
12#define VFIO_H
13
14
15#include <linux/iommu.h>
16#include <linux/mm.h>
17#include <linux/workqueue.h>
18#include <linux/poll.h>
19#include <uapi/linux/vfio.h>
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31
32
33struct 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);
44 void (*request)(void *device_data, unsigned int count);
45};
46
47extern struct iommu_group *vfio_iommu_group_get(struct device *dev);
48extern void vfio_iommu_group_put(struct iommu_group *group, struct device *dev);
49
50extern int vfio_add_group_dev(struct device *dev,
51 const struct vfio_device_ops *ops,
52 void *device_data);
53
54extern void *vfio_del_group_dev(struct device *dev);
55extern struct vfio_device *vfio_device_get_from_dev(struct device *dev);
56extern void vfio_device_put(struct vfio_device *device);
57extern void *vfio_device_data(struct vfio_device *device);
58
59
60
61
62struct vfio_iommu_driver_ops {
63 char *name;
64 struct module *owner;
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,
72 unsigned long arg);
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);
78 int (*pin_pages)(void *iommu_data, unsigned long *user_pfn,
79 int npage, int prot,
80 unsigned long *phys_pfn);
81 int (*unpin_pages)(void *iommu_data,
82 unsigned long *user_pfn, int npage);
83 int (*register_notifier)(void *iommu_data,
84 unsigned long *events,
85 struct notifier_block *nb);
86 int (*unregister_notifier)(void *iommu_data,
87 struct notifier_block *nb);
88};
89
90extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
91
92extern void vfio_unregister_iommu_driver(
93 const struct vfio_iommu_driver_ops *ops);
94
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96
97
98extern struct vfio_group *vfio_group_get_external_user(struct file *filep);
99extern void vfio_group_put_external_user(struct vfio_group *group);
100extern bool vfio_external_group_match_file(struct vfio_group *group,
101 struct file *filep);
102extern int vfio_external_user_iommu_id(struct vfio_group *group);
103extern long vfio_external_check_extension(struct vfio_group *group,
104 unsigned long arg);
105
106#define VFIO_PIN_PAGES_MAX_ENTRIES (PAGE_SIZE/sizeof(unsigned long))
107
108extern int vfio_pin_pages(struct device *dev, unsigned long *user_pfn,
109 int npage, int prot, unsigned long *phys_pfn);
110extern int vfio_unpin_pages(struct device *dev, unsigned long *user_pfn,
111 int npage);
112
113
114enum vfio_notify_type {
115 VFIO_IOMMU_NOTIFY = 0,
116 VFIO_GROUP_NOTIFY = 1,
117};
118
119
120#define VFIO_IOMMU_NOTIFY_DMA_UNMAP BIT(0)
121
122
123#define VFIO_GROUP_NOTIFY_SET_KVM BIT(0)
124
125extern int vfio_register_notifier(struct device *dev,
126 enum vfio_notify_type type,
127 unsigned long *required_events,
128 struct notifier_block *nb);
129extern int vfio_unregister_notifier(struct device *dev,
130 enum vfio_notify_type type,
131 struct notifier_block *nb);
132
133struct kvm;
134extern void vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm);
135
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139struct vfio_info_cap {
140 struct vfio_info_cap_header *buf;
141 size_t size;
142};
143extern struct vfio_info_cap_header *vfio_info_cap_add(
144 struct vfio_info_cap *caps, size_t size, u16 id, u16 version);
145extern void vfio_info_cap_shift(struct vfio_info_cap *caps, size_t offset);
146
147extern int vfio_info_add_capability(struct vfio_info_cap *caps,
148 int cap_type_id, void *cap_type);
149
150extern int vfio_set_irqs_validate_and_prepare(struct vfio_irq_set *hdr,
151 int num_irqs, int max_irq_type,
152 size_t *data_size);
153
154struct pci_dev;
155#if IS_ENABLED(CONFIG_VFIO_SPAPR_EEH)
156extern void vfio_spapr_pci_eeh_open(struct pci_dev *pdev);
157extern void vfio_spapr_pci_eeh_release(struct pci_dev *pdev);
158extern long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
159 unsigned int cmd,
160 unsigned long arg);
161#else
162static inline void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
163{
164}
165
166static inline void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)
167{
168}
169
170static inline long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
171 unsigned int cmd,
172 unsigned long arg)
173{
174 return -ENOTTY;
175}
176#endif
177
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180
181struct virqfd {
182 void *opaque;
183 struct eventfd_ctx *eventfd;
184 int (*handler)(void *, void *);
185 void (*thread)(void *, void *);
186 void *data;
187 struct work_struct inject;
188 wait_queue_entry_t wait;
189 poll_table pt;
190 struct work_struct shutdown;
191 struct virqfd **pvirqfd;
192};
193
194extern int vfio_virqfd_enable(void *opaque,
195 int (*handler)(void *, void *),
196 void (*thread)(void *, void *),
197 void *data, struct virqfd **pvirqfd, int fd);
198extern void vfio_virqfd_disable(struct virqfd **pvirqfd);
199
200#endif
201
