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11#include <linux/mutex.h>
12#include <linux/pci.h>
13#include <linux/vfio.h>
14#include <linux/irqbypass.h>
15#include <linux/types.h>
16#include <linux/uuid.h>
17#include <linux/notifier.h>
18
19#ifndef VFIO_PCI_CORE_H
20#define VFIO_PCI_CORE_H
21
22#define VFIO_PCI_OFFSET_SHIFT 40
23
24#define VFIO_PCI_OFFSET_TO_INDEX(off) (off >> VFIO_PCI_OFFSET_SHIFT)
25#define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
26#define VFIO_PCI_OFFSET_MASK (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
27
28
29#define PCI_CAP_ID_INVALID 0xFF
30#define PCI_CAP_ID_INVALID_VIRT 0xFE
31
32
33#define VFIO_PCI_IOEVENTFD_MAX 1000
34
35struct vfio_pci_ioeventfd {
36 struct list_head next;
37 struct vfio_pci_core_device *vdev;
38 struct virqfd *virqfd;
39 void __iomem *addr;
40 uint64_t data;
41 loff_t pos;
42 int bar;
43 int count;
44 bool test_mem;
45};
46
47struct vfio_pci_irq_ctx {
48 struct eventfd_ctx *trigger;
49 struct virqfd *unmask;
50 struct virqfd *mask;
51 char *name;
52 bool masked;
53 struct irq_bypass_producer producer;
54};
55
56struct vfio_pci_core_device;
57struct vfio_pci_region;
58
59struct vfio_pci_regops {
60 ssize_t (*rw)(struct vfio_pci_core_device *vdev, char __user *buf,
61 size_t count, loff_t *ppos, bool iswrite);
62 void (*release)(struct vfio_pci_core_device *vdev,
63 struct vfio_pci_region *region);
64 int (*mmap)(struct vfio_pci_core_device *vdev,
65 struct vfio_pci_region *region,
66 struct vm_area_struct *vma);
67 int (*add_capability)(struct vfio_pci_core_device *vdev,
68 struct vfio_pci_region *region,
69 struct vfio_info_cap *caps);
70};
71
72struct vfio_pci_region {
73 u32 type;
74 u32 subtype;
75 const struct vfio_pci_regops *ops;
76 void *data;
77 size_t size;
78 u32 flags;
79};
80
81struct vfio_pci_dummy_resource {
82 struct resource resource;
83 int index;
84 struct list_head res_next;
85};
86
87struct vfio_pci_vf_token {
88 struct mutex lock;
89 uuid_t uuid;
90 int users;
91};
92
93struct vfio_pci_mmap_vma {
94 struct vm_area_struct *vma;
95 struct list_head vma_next;
96};
97
98struct vfio_pci_core_device {
99 struct vfio_device vdev;
100 struct pci_dev *pdev;
101 void __iomem *barmap[PCI_STD_NUM_BARS];
102 bool bar_mmap_supported[PCI_STD_NUM_BARS];
103 u8 *pci_config_map;
104 u8 *vconfig;
105 struct perm_bits *msi_perm;
106 spinlock_t irqlock;
107 struct mutex igate;
108 struct vfio_pci_irq_ctx *ctx;
109 int num_ctx;
110 int irq_type;
111 int num_regions;
112 struct vfio_pci_region *region;
113 u8 msi_qmax;
114 u8 msix_bar;
115 u16 msix_size;
116 u32 msix_offset;
117 u32 rbar[7];
118 bool pci_2_3;
119 bool virq_disabled;
120 bool reset_works;
121 bool extended_caps;
122 bool bardirty;
123 bool has_vga;
124 bool needs_reset;
125 bool nointx;
126 bool needs_pm_restore;
127 struct pci_saved_state *pci_saved_state;
128 struct pci_saved_state *pm_save;
129 int ioeventfds_nr;
130 struct eventfd_ctx *err_trigger;
131 struct eventfd_ctx *req_trigger;
132 struct list_head dummy_resources_list;
133 struct mutex ioeventfds_lock;
134 struct list_head ioeventfds_list;
135 struct vfio_pci_vf_token *vf_token;
136 struct notifier_block nb;
137 struct mutex vma_lock;
138 struct list_head vma_list;
139 struct rw_semaphore memory_lock;
140};
141
142#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
143#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
144#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
145#define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
146#define irq_is(vdev, type) (vdev->irq_type == type)
147
148extern void vfio_pci_intx_mask(struct vfio_pci_core_device *vdev);
149extern void vfio_pci_intx_unmask(struct vfio_pci_core_device *vdev);
150
151extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_core_device *vdev,
152 uint32_t flags, unsigned index,
153 unsigned start, unsigned count, void *data);
154
155extern ssize_t vfio_pci_config_rw(struct vfio_pci_core_device *vdev,
156 char __user *buf, size_t count,
157 loff_t *ppos, bool iswrite);
158
159extern ssize_t vfio_pci_bar_rw(struct vfio_pci_core_device *vdev, char __user *buf,
160 size_t count, loff_t *ppos, bool iswrite);
161
162extern ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
163 size_t count, loff_t *ppos, bool iswrite);
164
165extern long vfio_pci_ioeventfd(struct vfio_pci_core_device *vdev, loff_t offset,
166 uint64_t data, int count, int fd);
167
168extern int vfio_pci_init_perm_bits(void);
169extern void vfio_pci_uninit_perm_bits(void);
170
171extern int vfio_config_init(struct vfio_pci_core_device *vdev);
172extern void vfio_config_free(struct vfio_pci_core_device *vdev);
173
174extern int vfio_pci_register_dev_region(struct vfio_pci_core_device *vdev,
175 unsigned int type, unsigned int subtype,
176 const struct vfio_pci_regops *ops,
177 size_t size, u32 flags, void *data);
178
179extern int vfio_pci_set_power_state(struct vfio_pci_core_device *vdev,
180 pci_power_t state);
181
182extern bool __vfio_pci_memory_enabled(struct vfio_pci_core_device *vdev);
183extern void vfio_pci_zap_and_down_write_memory_lock(struct vfio_pci_core_device
184 *vdev);
185extern u16 vfio_pci_memory_lock_and_enable(struct vfio_pci_core_device *vdev);
186extern void vfio_pci_memory_unlock_and_restore(struct vfio_pci_core_device *vdev,
187 u16 cmd);
188
189#ifdef CONFIG_VFIO_PCI_IGD
190extern int vfio_pci_igd_init(struct vfio_pci_core_device *vdev);
191#else
192static inline int vfio_pci_igd_init(struct vfio_pci_core_device *vdev)
193{
194 return -ENODEV;
195}
196#endif
197
198#ifdef CONFIG_S390
199extern int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
200 struct vfio_info_cap *caps);
201#else
202static inline int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev,
203 struct vfio_info_cap *caps)
204{
205 return -ENODEV;
206}
207#endif
208
209
210void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga,
211 bool is_disable_idle_d3);
212void vfio_pci_core_close_device(struct vfio_device *core_vdev);
213void vfio_pci_core_init_device(struct vfio_pci_core_device *vdev,
214 struct pci_dev *pdev,
215 const struct vfio_device_ops *vfio_pci_ops);
216int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev);
217void vfio_pci_core_uninit_device(struct vfio_pci_core_device *vdev);
218void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev);
219int vfio_pci_core_sriov_configure(struct pci_dev *pdev, int nr_virtfn);
220extern const struct pci_error_handlers vfio_pci_core_err_handlers;
221long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd,
222 unsigned long arg);
223ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf,
224 size_t count, loff_t *ppos);
225ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf,
226 size_t count, loff_t *ppos);
227int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma);
228void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count);
229int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf);
230int vfio_pci_core_enable(struct vfio_pci_core_device *vdev);
231void vfio_pci_core_disable(struct vfio_pci_core_device *vdev);
232void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
233
234static inline bool vfio_pci_is_vga(struct pci_dev *pdev)
235{
236 return (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
237}
238
239#endif
240
