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gerrit-public.fairphone.software / kernel / msm-5.4 / 6a79296cb15d947bcb4558011fe066e5d8252b35 / . / drivers / vfio / pci / vfio_pci_private.h
blob: 016c14a1b454bfe5a4528a243ef400d539d9b05b [file] [log] [blame]
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]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>
Feng Wu6d7425f2015-09-18 22:29:50 +0800[diff] [blame]16#include <linux/irqbypass.h>
Alex Williamson28541d42016-02-22 16:02:39 -0700[diff] [blame]17#include <linux/types.h>
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]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
Alex Williamson345d7102016-02-22 16:02:41 -0700[diff] [blame]28/* Special capability IDs predefined access */
29#define PCI_CAP_ID_INVALID 0xFF /* default raw access */
30#define PCI_CAP_ID_INVALID_VIRT 0xFE /* default virt access */
31
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]32struct vfio_pci_irq_ctx {
33 struct eventfd_ctx *trigger;
34 struct virqfd *unmask;
35 struct virqfd *mask;
36 char *name;
37 bool masked;
Feng Wu6d7425f2015-09-18 22:29:50 +0800[diff] [blame]38 struct irq_bypass_producer producer;
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]39};
40
Alex Williamson28541d42016-02-22 16:02:39 -0700[diff] [blame]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
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]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;
Alex Williamson28541d42016-02-22 16:02:39 -0700[diff] [blame]72 int num_regions;
73 struct vfio_pci_region *region;
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]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;
Alex Williamson84237a82013-02-18 10:11:13 -0700[diff] [blame]84 bool has_vga;
Alex Williamsonbc4fba72014-08-07 11:12:07 -0600[diff] [blame]85 bool needs_reset;
Alex Williamson450744052016-03-24 13:05:18 -0600[diff] [blame]86 bool nointx;
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]87 struct pci_saved_state *pci_saved_state;
Alex Williamson61d79252014-08-07 11:12:04 -0600[diff] [blame]88 int refcnt;
Vijay Mohan Pandarathildad9f892013-03-11 09:31:22 -0600[diff] [blame]89 struct eventfd_ctx *err_trigger;
Alex Williamson6140a8f2015-02-06 15:05:08 -0700[diff] [blame]90 struct eventfd_ctx *req_trigger;
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]91};
92
93#define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
94#define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
95#define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
96#define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
97#define irq_is(vdev, type) (vdev->irq_type == type)
98
99extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
100extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
101
102extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
103 uint32_t flags, unsigned index,
104 unsigned start, unsigned count, void *data);
105
Alex Williamson906ee992013-02-14 14:02:12 -0700[diff] [blame]106extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
107 char __user *buf, size_t count,
108 loff_t *ppos, bool iswrite);
109
110extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
111 size_t count, loff_t *ppos, bool iswrite);
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]112
Alex Williamson84237a82013-02-18 10:11:13 -0700[diff] [blame]113extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
114 size_t count, loff_t *ppos, bool iswrite);
115
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]116extern int vfio_pci_init_perm_bits(void);
117extern void vfio_pci_uninit_perm_bits(void);
118
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]119extern int vfio_config_init(struct vfio_pci_device *vdev);
120extern void vfio_config_free(struct vfio_pci_device *vdev);
Alex Williamson28541d42016-02-22 16:02:39 -0700[diff] [blame]121
122extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
123 unsigned int type, unsigned int subtype,
124 const struct vfio_pci_regops *ops,
125 size_t size, u32 flags, void *data);
Alex Williamson5846ff52016-02-22 16:02:43 -0700[diff] [blame]126#ifdef CONFIG_VFIO_PCI_IGD
Alex Williamsonf572a962016-02-22 16:02:45 -0700[diff] [blame]127extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
Alex Williamson5846ff52016-02-22 16:02:43 -0700[diff] [blame]128#else
Alex Williamsonf572a962016-02-22 16:02:45 -0700[diff] [blame]129static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
Alex Williamson5846ff52016-02-22 16:02:43 -0700[diff] [blame]130{
131 return -ENODEV;
132}
133#endif
Alex Williamson89e1f7d2012-07-31 08:16:24 -0600[diff] [blame]134#endif /* VFIO_PCI_PRIVATE_H */