drivers/vfio/pci/vfio_pci_private.h

   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
  26 struct 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
  34 struct 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         struct pci_saved_state  *pci_saved_state;
  58         atomic_t                refcnt;
  59         struct eventfd_ctx      *err_trigger;
  60 };
  61
  62 #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
  63 #define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
  64 #define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
  65 #define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
  66 #define irq_is(vdev, type) (vdev->irq_type == type)
  67
  68 extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
  69 extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
  70
  71 extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
  72                                    uint32_t flags, unsigned index,
  73                                    unsigned start, unsigned count, void *data);
  74
  75 extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
  76                                   char __user *buf, size_t count,
  77                                   loff_t *ppos, bool iswrite);
  78
  79 extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
  80                                size_t count, loff_t *ppos, bool iswrite);
  81
  82 extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
  83                                size_t count, loff_t *ppos, bool iswrite);
  84
  85 extern int vfio_pci_init_perm_bits(void);
  86 extern void vfio_pci_uninit_perm_bits(void);
  87
  88 extern int vfio_pci_virqfd_init(void);
  89 extern void vfio_pci_virqfd_exit(void);
  90
  91 extern int vfio_config_init(struct vfio_pci_device *vdev);
  92 extern void vfio_config_free(struct vfio_pci_device *vdev);
  93 #endif /* VFIO_PCI_PRIVATE_H */