summaryrefslogtreecommitdiff
path: root/drivers/vfio/pci/vfio_pci_private.h
blob: 127071b84dd72d4f944a24cfafbc1b5c4b52380d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
 * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
 *     Author: Alex Williamson <alex.williamson@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Derived from original vfio:
 * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
 * Author: Tom Lyon, pugs@cisco.com
 */

#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/irqbypass.h>
#include <linux/types.h>

#ifndef VFIO_PCI_PRIVATE_H
#define VFIO_PCI_PRIVATE_H

#define VFIO_PCI_OFFSET_SHIFT   40

#define VFIO_PCI_OFFSET_TO_INDEX(off)	(off >> VFIO_PCI_OFFSET_SHIFT)
#define VFIO_PCI_INDEX_TO_OFFSET(index)	((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
#define VFIO_PCI_OFFSET_MASK	(((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)

/* Special capability IDs predefined access */
#define PCI_CAP_ID_INVALID		0xFF	/* default raw access */
#define PCI_CAP_ID_INVALID_VIRT		0xFE	/* default virt access */

/* Cap maximum number of ioeventfds per device (arbitrary) */
#define VFIO_PCI_IOEVENTFD_MAX		1000

struct vfio_pci_ioeventfd {
	struct list_head	next;
	struct virqfd		*virqfd;
	void __iomem		*addr;
	uint64_t		data;
	loff_t			pos;
	int			bar;
	int			count;
};

struct vfio_pci_irq_ctx {
	struct eventfd_ctx	*trigger;
	struct virqfd		*unmask;
	struct virqfd		*mask;
	char			*name;
	bool			masked;
	struct irq_bypass_producer	producer;
};

struct vfio_pci_device;
struct vfio_pci_region;

struct vfio_pci_regops {
	size_t	(*rw)(struct vfio_pci_device *vdev, char __user *buf,
		      size_t count, loff_t *ppos, bool iswrite);
	void	(*release)(struct vfio_pci_device *vdev,
			   struct vfio_pci_region *region);
	int	(*mmap)(struct vfio_pci_device *vdev,
			struct vfio_pci_region *region,
			struct vm_area_struct *vma);
	int	(*add_capability)(struct vfio_pci_device *vdev,
				  struct vfio_pci_region *region,
				  struct vfio_info_cap *caps);
};

struct vfio_pci_region {
	u32				type;
	u32				subtype;
	const struct vfio_pci_regops	*ops;
	void				*data;
	size_t				size;
	u32				flags;
};

struct vfio_pci_dummy_resource {
	struct resource		resource;
	int			index;
	struct list_head	res_next;
};

struct vfio_pci_device {
	struct pci_dev		*pdev;
	void __iomem		*barmap[PCI_STD_RESOURCE_END + 1];
	bool			bar_mmap_supported[PCI_STD_RESOURCE_END + 1];
	u8			*pci_config_map;
	u8			*vconfig;
	struct perm_bits	*msi_perm;
	spinlock_t		irqlock;
	struct mutex		igate;
	struct vfio_pci_irq_ctx	*ctx;
	int			num_ctx;
	int			irq_type;
	int			num_regions;
	struct vfio_pci_region	*region;
	u8			msi_qmax;
	u8			msix_bar;
	u16			msix_size;
	u32			msix_offset;
	u32			rbar[7];
	bool			pci_2_3;
	bool			virq_disabled;
	bool			reset_works;
	bool			extended_caps;
	bool			bardirty;
	bool			has_vga;
	bool			needs_reset;
	bool			nointx;
	struct pci_saved_state	*pci_saved_state;
	int			refcnt;
	int			ioeventfds_nr;
	struct eventfd_ctx	*err_trigger;
	struct eventfd_ctx	*req_trigger;
	struct list_head	dummy_resources_list;
	struct mutex		ioeventfds_lock;
	struct list_head	ioeventfds_list;
};

#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
#define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
#define irq_is(vdev, type) (vdev->irq_type == type)

extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);

extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
				   uint32_t flags, unsigned index,
				   unsigned start, unsigned count, void *data);

extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
				  char __user *buf, size_t count,
				  loff_t *ppos, bool iswrite);

extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
			       size_t count, loff_t *ppos, bool iswrite);

extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
			       size_t count, loff_t *ppos, bool iswrite);

extern long vfio_pci_ioeventfd(struct vfio_pci_device *vdev, loff_t offset,
			       uint64_t data, int count, int fd);

extern int vfio_pci_init_perm_bits(void);
extern void vfio_pci_uninit_perm_bits(void);

extern int vfio_config_init(struct vfio_pci_device *vdev);
extern void vfio_config_free(struct vfio_pci_device *vdev);

extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
					unsigned int type, unsigned int subtype,
					const struct vfio_pci_regops *ops,
					size_t size, u32 flags, void *data);
#ifdef CONFIG_VFIO_PCI_IGD
extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
#else
static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
{
	return -ENODEV;
}
#endif
#ifdef CONFIG_VFIO_PCI_NVLINK2
extern int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev);
extern int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev);
#else
static inline int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev)
{
	return -ENODEV;
}

static inline int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev)
{
	return -ENODEV;
}
#endif
#endif /* VFIO_PCI_PRIVATE_H */