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14#include <linux/mutex.h>
15#include <linux/pci.h>
16#include <linux/irqbypass.h>
17#include <linux/types.h>
18
19#ifndef VFIO_PCI_PRIVATE_H
20#define VFIO_PCI_PRIVATE_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
32struct vfio_pci_irq_ctx {
33 struct eventfd_ctx *trigger;
34 struct virqfd *unmask;
35 struct virqfd *mask;
36 char *name;
37 bool masked;
38 struct irq_bypass_producer producer;
39};
40
41struct vfio_pci_device;
42struct vfio_pci_region;
43
44struct vfio_pci_regops {
45 size_t (*rw)(struct vfio_pci_device *vdev, char __user *buf,
46 size_t count, loff_t *ppos, bool iswrite);
47 void (*release)(struct vfio_pci_device *vdev,
48 struct vfio_pci_region *region);
49};
50
51struct vfio_pci_region {
52 u32 type;
53 u32 subtype;
54 const struct vfio_pci_regops *ops;
55 void *data;
56 size_t size;
57 u32 flags;
58};
59
60struct vfio_pci_device {
61 struct pci_dev *pdev;
62 void __iomem *barmap[PCI_STD_RESOURCE_END + 1];
63 u8 *pci_config_map;
64 u8 *vconfig;
65 struct perm_bits *msi_perm;
66 spinlock_t irqlock;
67 struct mutex igate;
68 struct msix_entry *msix;
69 struct vfio_pci_irq_ctx *ctx;
70 int num_ctx;
71 int irq_type;
72 int num_regions;
73 struct vfio_pci_region *region;
74 u8 msi_qmax;
75 u8 msix_bar;
76 u16 msix_size;
77 u32 msix_offset;
78 u32 rbar[7];
79 bool pci_2_3;
80 bool virq_disabled;
81 bool reset_works;
82 bool extended_caps;
83 bool bardirty;
84 bool has_vga;
85 bool needs_reset;
86 struct pci_saved_state *pci_saved_state;
87 int refcnt;
88 struct eventfd_ctx *err_trigger;
89 struct eventfd_ctx *req_trigger;
90};
91
92#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
93#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
94#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
95#define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
96#define irq_is(vdev, type) (vdev->irq_type == type)
97
98extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
99extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
100
101extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
102 uint32_t flags, unsigned index,
103 unsigned start, unsigned count, void *data);
104
105extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
106 char __user *buf, size_t count,
107 loff_t *ppos, bool iswrite);
108
109extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
110 size_t count, loff_t *ppos, bool iswrite);
111
112extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
113 size_t count, loff_t *ppos, bool iswrite);
114
115extern int vfio_pci_init_perm_bits(void);
116extern void vfio_pci_uninit_perm_bits(void);
117
118extern int vfio_config_init(struct vfio_pci_device *vdev);
119extern void vfio_config_free(struct vfio_pci_device *vdev);
120
121extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
122 unsigned int type, unsigned int subtype,
123 const struct vfio_pci_regops *ops,
124 size_t size, u32 flags, void *data);
125#ifdef CONFIG_VFIO_PCI_IGD
126extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
127#else
128static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
129{
130 return -ENODEV;
131}
132#endif
133#endif
134
