drivers/vfio/pci/vfio_pci_private.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
   4  *     Author: Alex Williamson <alex.williamson@redhat.com>
   5  *
   6  * Derived from original vfio:
   7  * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
   8  * Author: Tom Lyon, pugs@cisco.com
   9  */
  10
  11 #include <linux/mutex.h>
  12 #include <linux/pci.h>
  13 #include <linux/irqbypass.h>
  14 #include <linux/types.h>
  15
  16 #ifndef VFIO_PCI_PRIVATE_H
  17 #define VFIO_PCI_PRIVATE_H
  18
  19 #define VFIO_PCI_OFFSET_SHIFT   40
  20
  21 #define VFIO_PCI_OFFSET_TO_INDEX(off)   (off >> VFIO_PCI_OFFSET_SHIFT)
  22 #define VFIO_PCI_INDEX_TO_OFFSET(index) ((u64)(index) << VFIO_PCI_OFFSET_SHIFT)
  23 #define VFIO_PCI_OFFSET_MASK    (((u64)(1) << VFIO_PCI_OFFSET_SHIFT) - 1)
  24
  25 /* Special capability IDs predefined access */
  26 #define PCI_CAP_ID_INVALID              0xFF    /* default raw access */
  27 #define PCI_CAP_ID_INVALID_VIRT         0xFE    /* default virt access */
  28
  29 /* Cap maximum number of ioeventfds per device (arbitrary) */
  30 #define VFIO_PCI_IOEVENTFD_MAX          1000
  31
  32 struct vfio_pci_ioeventfd {
  33         struct list_head        next;
  34         struct virqfd           *virqfd;
  35         void __iomem            *addr;
  36         uint64_t                data;
  37         loff_t                  pos;
  38         int                     bar;
  39         int                     count;
  40 };
  41
  42 struct vfio_pci_irq_ctx {
  43         struct eventfd_ctx      *trigger;
  44         struct virqfd           *unmask;
  45         struct virqfd           *mask;
  46         char                    *name;
  47         bool                    masked;
  48         struct irq_bypass_producer      producer;
  49 };
  50
  51 struct vfio_pci_device;
  52 struct vfio_pci_region;
  53
  54 struct vfio_pci_regops {
  55         size_t  (*rw)(struct vfio_pci_device *vdev, char __user *buf,
  56                       size_t count, loff_t *ppos, bool iswrite);
  57         void    (*release)(struct vfio_pci_device *vdev,
  58                            struct vfio_pci_region *region);
  59         int     (*mmap)(struct vfio_pci_device *vdev,
  60                         struct vfio_pci_region *region,
  61                         struct vm_area_struct *vma);
  62         int     (*add_capability)(struct vfio_pci_device *vdev,
  63                                   struct vfio_pci_region *region,
  64                                   struct vfio_info_cap *caps);
  65 };
  66
  67 struct vfio_pci_region {
  68         u32                             type;
  69         u32                             subtype;
  70         const struct vfio_pci_regops    *ops;
  71         void                            *data;
  72         size_t                          size;
  73         u32                             flags;
  74 };
  75
  76 struct vfio_pci_dummy_resource {
  77         struct resource         resource;
  78         int                     index;
  79         struct list_head        res_next;
  80 };
  81
  82 struct vfio_pci_reflck {
  83         struct kref             kref;
  84         struct mutex            lock;
  85 };
  86
  87 struct vfio_pci_device {
  88         struct pci_dev          *pdev;
  89         void __iomem            *barmap[PCI_STD_NUM_BARS];
  90         bool                    bar_mmap_supported[PCI_STD_NUM_BARS];
  91         u8                      *pci_config_map;
  92         u8                      *vconfig;
  93         struct perm_bits        *msi_perm;
  94         spinlock_t              irqlock;
  95         struct mutex            igate;
  96         struct vfio_pci_irq_ctx *ctx;
  97         int                     num_ctx;
  98         int                     irq_type;
  99         int                     num_regions;
 100         struct vfio_pci_region  *region;
 101         u8                      msi_qmax;
 102         u8                      msix_bar;
 103         u16                     msix_size;
 104         u32                     msix_offset;
 105         u32                     rbar[7];
 106         bool                    pci_2_3;
 107         bool                    virq_disabled;
 108         bool                    reset_works;
 109         bool                    extended_caps;
 110         bool                    bardirty;
 111         bool                    has_vga;
 112         bool                    needs_reset;
 113         bool                    nointx;
 114         bool                    needs_pm_restore;
 115         struct pci_saved_state  *pci_saved_state;
 116         struct pci_saved_state  *pm_save;
 117         struct vfio_pci_reflck  *reflck;
 118         int                     refcnt;
 119         int                     ioeventfds_nr;
 120         struct eventfd_ctx      *err_trigger;
 121         struct eventfd_ctx      *req_trigger;
 122         struct list_head        dummy_resources_list;
 123         struct mutex            ioeventfds_lock;
 124         struct list_head        ioeventfds_list;
 125 };
 126
 127 #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
 128 #define is_msi(vdev) (vdev->irq_type == VFIO_PCI_MSI_IRQ_INDEX)
 129 #define is_msix(vdev) (vdev->irq_type == VFIO_PCI_MSIX_IRQ_INDEX)
 130 #define is_irq_none(vdev) (!(is_intx(vdev) || is_msi(vdev) || is_msix(vdev)))
 131 #define irq_is(vdev, type) (vdev->irq_type == type)
 132
 133 extern void vfio_pci_intx_mask(struct vfio_pci_device *vdev);
 134 extern void vfio_pci_intx_unmask(struct vfio_pci_device *vdev);
 135
 136 extern int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev,
 137                                    uint32_t flags, unsigned index,
 138                                    unsigned start, unsigned count, void *data);
 139
 140 extern ssize_t vfio_pci_config_rw(struct vfio_pci_device *vdev,
 141                                   char __user *buf, size_t count,
 142                                   loff_t *ppos, bool iswrite);
 143
 144 extern ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
 145                                size_t count, loff_t *ppos, bool iswrite);
 146
 147 extern ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
 148                                size_t count, loff_t *ppos, bool iswrite);
 149
 150 extern long vfio_pci_ioeventfd(struct vfio_pci_device *vdev, loff_t offset,
 151                                uint64_t data, int count, int fd);
 152
 153 extern int vfio_pci_init_perm_bits(void);
 154 extern void vfio_pci_uninit_perm_bits(void);
 155
 156 extern int vfio_config_init(struct vfio_pci_device *vdev);
 157 extern void vfio_config_free(struct vfio_pci_device *vdev);
 158
 159 extern int vfio_pci_register_dev_region(struct vfio_pci_device *vdev,
 160                                         unsigned int type, unsigned int subtype,
 161                                         const struct vfio_pci_regops *ops,
 162                                         size_t size, u32 flags, void *data);
 163
 164 extern int vfio_pci_set_power_state(struct vfio_pci_device *vdev,
 165                                     pci_power_t state);
 166
 167 #ifdef CONFIG_VFIO_PCI_IGD
 168 extern int vfio_pci_igd_init(struct vfio_pci_device *vdev);
 169 #else
 170 static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
 171 {
 172         return -ENODEV;
 173 }
 174 #endif
 175 #ifdef CONFIG_VFIO_PCI_NVLINK2
 176 extern int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev);
 177 extern int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev);
 178 #else
 179 static inline int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev)
 180 {
 181         return -ENODEV;
 182 }
 183
 184 static inline int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev)
 185 {
 186         return -ENODEV;
 187 }
 188 #endif
 189 #endif /* VFIO_PCI_PRIVATE_H */