[go: nahoru, domu]
1/*
2 * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
3 *     Author: Alex Williamson <alex.williamson@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Derived from original vfio:
10 * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
11 * Author: Tom Lyon, pugs@cisco.com
12 */
13
14#include <linux/mutex.h>
15#include <linux/pci.h>
16
17#ifndef VFIO_PCI_PRIVATE_H
18#define VFIO_PCI_PRIVATE_H
19
20#define VFIO_PCI_OFFSET_SHIFT   40
21
22#define VFIO_PCI_OFFSET_TO_INDEX(off)	(off >> VFIO_PCI_OFFSET_SHIFT)
23#define VFIO_PCI_INDEX_TO_OFFSET(index)	((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
24#define VFIO_PCI_OFFSET_MASK	(((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
25
26struct vfio_pci_irq_ctx {
27	struct eventfd_ctx	*trigger;
28	struct virqfd		*unmask;
29	struct virqfd		*mask;
30	char			*name;
31	bool			masked;
32};
33
34struct vfio_pci_device {
35	struct pci_dev		*pdev;
36	void __iomem		*barmap[PCI_STD_RESOURCE_END + 1];
37	u8			*pci_config_map;
38	u8			*vconfig;
39	struct perm_bits	*msi_perm;
40	spinlock_t		irqlock;
41	struct mutex		igate;
42	struct msix_entry	*msix;
43	struct vfio_pci_irq_ctx	*ctx;
44	int			num_ctx;
45	int			irq_type;
46	u8			msi_qmax;
47	u8			msix_bar;
48	u16			msix_size;
49	u32			msix_offset;
50	u32			rbar[7];
51	bool			pci_2_3;
52	bool			virq_disabled;
53	bool			reset_works;
54	bool			extended_caps;
55	bool			bardirty;
56	bool			has_vga;
57	bool			needs_reset;
58	struct pci_saved_state	*pci_saved_state;
59	int			refcnt;
60	struct eventfd_ctx	*err_trigger;
61};
62
63#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
64#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
65#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
66#define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
67#define irq_is(vdev, type) (vdev->irq_type == type)
68
69extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
70extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
71
72extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
73				   uint32_t flags, unsigned index,
74				   unsigned start, unsigned count, void *data);
75
76extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
77				  char __user *buf, size_t count,
78				  loff_t *ppos, bool iswrite);
79
80extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
81			       size_t count, loff_t *ppos, bool iswrite);
82
83extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
84			       size_t count, loff_t *ppos, bool iswrite);
85
86extern int vfio_pci_init_perm_bits(void);
87extern void vfio_pci_uninit_perm_bits(void);
88
89extern int vfio_pci_virqfd_init(void);
90extern void vfio_pci_virqfd_exit(void);
91
92extern int vfio_config_init(struct vfio_pci_device *vdev);
93extern void vfio_config_free(struct vfio_pci_device *vdev);
94#endif /* VFIO_PCI_PRIVATE_H */
95