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 #include <linux/irqbypass.h>
  17
  18 #ifndef VFIO_PCI_PRIVATE_H
  19 #define VFIO_PCI_PRIVATE_H
  20
  21 #define VFIO_PCI_OFFSET_SHIFT   40
  22
  23 #define VFIO_PCI_OFFSET_TO_INDEX(off)   (off >> VFIO_PCI_OFFSET_SHIFT)
  24 #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
  25 #define VFIO_PCI_OFFSET_MASK    (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
  26
  27 struct vfio_pci_irq_ctx {
  28         struct eventfd_ctx      *trigger;
  29         struct virqfd           *unmask;
  30         struct virqfd           *mask;
  31         char                    *name;
  32         bool                    masked;
  33         struct irq_bypass_producer      producer;
  34 };
  35
  36 struct vfio_pci_device {
  37         struct pci_dev          *pdev;
  38         void __iomem            *barmap[PCI_STD_RESOURCE_END + 1];
  39         u8                      *pci_config_map;
  40         u8                      *vconfig;
  41         struct perm_bits        *msi_perm;
  42         spinlock_t              irqlock;
  43         struct mutex            igate;
  44         struct msix_entry       *msix;
  45         struct vfio_pci_irq_ctx *ctx;
  46         int                     num_ctx;
  47         int                     irq_type;
  48         u8                      msi_qmax;
  49         u8                      msix_bar;
  50         u16                     msix_size;
  51         u32                     msix_offset;
  52         u32                     rbar[7];
  53         bool                    pci_2_3;
  54         bool                    virq_disabled;
  55         bool                    reset_works;
  56         bool                    extended_caps;
  57         bool                    bardirty;
  58         bool                    has_vga;
  59         bool                    needs_reset;
  60         struct pci_saved_state  *pci_saved_state;
  61         int                     refcnt;
  62         struct eventfd_ctx      *err_trigger;
  63         struct eventfd_ctx      *req_trigger;
  64 };
  65
  66 #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
  67 #define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
  68 #define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
  69 #define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
  70 #define irq_is(vdev, type) (vdev->irq_type == type)
  71
  72 extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
  73 extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
  74
  75 extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
  76                                    uint32_t flags, unsigned index,
  77                                    unsigned start, unsigned count, void *data);
  78
  79 extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
  80                                   char __user *buf, size_t count,
  81                                   loff_t *ppos, bool iswrite);
  82
  83 extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
  84                                size_t count, loff_t *ppos, bool iswrite);
  85
  86 extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
  87                                size_t count, loff_t *ppos, bool iswrite);
  88
  89 extern int vfio_pci_init_perm_bits(void);
  90 extern void vfio_pci_uninit_perm_bits(void);
  91
  92 extern int vfio_config_init(struct vfio_pci_device *vdev);
  93 extern void vfio_config_free(struct vfio_pci_device *vdev);
  94 #endif /* VFIO_PCI_PRIVATE_H */