LXR qemu/hw/vfio/pci.h

   1/*
   2 * vfio based device assignment support - PCI devices
   3 *
   4 * Copyright Red Hat, Inc. 2012-2015
   5 *
   6 * Authors:
   7 *  Alex Williamson <alex.williamson@redhat.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2.  See
  10 * the COPYING file in the top-level directory.
  11 */
  12#ifndef HW_VFIO_VFIO_PCI_H
  13#define HW_VFIO_VFIO_PCI_H
  14
  15#include "qemu-common.h"
  16#include "exec/memory.h"
  17#include "hw/pci/pci.h"
  18#include "hw/vfio/vfio-common.h"
  19#include "qemu/event_notifier.h"
  20#include "qemu/queue.h"
  21#include "qemu/timer.h"
  22
  23#define PCI_ANY_ID (~0)
  24
  25struct VFIOPCIDevice;
  26
  27typedef struct VFIOQuirk {
  28    QLIST_ENTRY(VFIOQuirk) next;
  29    void *data;
  30    int nr_mem;
  31    MemoryRegion *mem;
  32} VFIOQuirk;
  33
  34typedef struct VFIOBAR {
  35    VFIORegion region;
  36    MemoryRegion *mr;
  37    size_t size;
  38    uint8_t type;
  39    bool ioport;
  40    bool mem64;
  41    QLIST_HEAD(, VFIOQuirk) quirks;
  42} VFIOBAR;
  43
  44typedef struct VFIOVGARegion {
  45    MemoryRegion mem;
  46    off_t offset;
  47    int nr;
  48    QLIST_HEAD(, VFIOQuirk) quirks;
  49} VFIOVGARegion;
  50
  51typedef struct VFIOVGA {
  52    off_t fd_offset;
  53    int fd;
  54    VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS];
  55} VFIOVGA;
  56
  57typedef struct VFIOINTx {
  58    bool pending; /* interrupt pending */
  59    bool kvm_accel; /* set when QEMU bypass through KVM enabled */
  60    uint8_t pin; /* which pin to pull for qemu_set_irq */
  61    EventNotifier interrupt; /* eventfd triggered on interrupt */
  62    EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
  63    PCIINTxRoute route; /* routing info for QEMU bypass */
  64    uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
  65    QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */
  66} VFIOINTx;
  67
  68typedef struct VFIOMSIVector {
  69    /*
  70     * Two interrupt paths are configured per vector.  The first, is only used
  71     * for interrupts injected via QEMU.  This is typically the non-accel path,
  72     * but may also be used when we want QEMU to handle masking and pending
  73     * bits.  The KVM path bypasses QEMU and is therefore higher performance,
  74     * but requires masking at the device.  virq is used to track the MSI route
  75     * through KVM, thus kvm_interrupt is only available when virq is set to a
  76     * valid (>= 0) value.
  77     */
  78    EventNotifier interrupt;
  79    EventNotifier kvm_interrupt;
  80    struct VFIOPCIDevice *vdev; /* back pointer to device */
  81    int virq;
  82    bool use;
  83} VFIOMSIVector;
  84
  85enum {
  86    VFIO_INT_NONE = 0,
  87    VFIO_INT_INTx = 1,
  88    VFIO_INT_MSI  = 2,
  89    VFIO_INT_MSIX = 3,
  90};
  91
  92/* Cache of MSI-X setup */
  93typedef struct VFIOMSIXInfo {
  94    uint8_t table_bar;
  95    uint8_t pba_bar;
  96    uint16_t entries;
  97    uint32_t table_offset;
  98    uint32_t pba_offset;
  99    unsigned long *pending;
 100} VFIOMSIXInfo;
 101
 102typedef struct VFIOPCIDevice {
 103    PCIDevice pdev;
 104    VFIODevice vbasedev;
 105    VFIOINTx intx;
 106    unsigned int config_size;
 107    uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */
 108    off_t config_offset; /* Offset of config space region within device fd */
 109    unsigned int rom_size;
 110    off_t rom_offset; /* Offset of ROM region within device fd */
 111    void *rom;
 112    int msi_cap_size;
 113    VFIOMSIVector *msi_vectors;
 114    VFIOMSIXInfo *msix;
 115    int nr_vectors; /* Number of MSI/MSIX vectors currently in use */
 116    int interrupt; /* Current interrupt type */
 117    VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */
 118    VFIOVGA *vga; /* 0xa0000, 0x3b0, 0x3c0 */
 119    void *igd_opregion;
 120    PCIHostDeviceAddress host;
 121    EventNotifier err_notifier;
 122    EventNotifier req_notifier;
 123    int (*resetfn)(struct VFIOPCIDevice *);
 124    uint32_t vendor_id;
 125    uint32_t device_id;
 126    uint32_t sub_vendor_id;
 127    uint32_t sub_device_id;
 128    uint32_t features;
 129#define VFIO_FEATURE_ENABLE_VGA_BIT 0
 130#define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
 131#define VFIO_FEATURE_ENABLE_REQ_BIT 1
 132#define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT)
 133#define VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT 2
 134#define VFIO_FEATURE_ENABLE_IGD_OPREGION \
 135                                (1 << VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT)
 136    OnOffAuto display;
 137    int32_t bootindex;
 138    uint32_t igd_gms;
 139    OffAutoPCIBAR msix_relo;
 140    uint8_t pm_cap;
 141    uint8_t nv_gpudirect_clique;
 142    bool pci_aer;
 143    bool req_enabled;
 144    bool has_flr;
 145    bool has_pm_reset;
 146    bool rom_read_failed;
 147    bool no_kvm_intx;
 148    bool no_kvm_msi;
 149    bool no_kvm_msix;
 150    bool no_geforce_quirks;
 151    VFIODisplay *dpy;
 152} VFIOPCIDevice;
 153
 154uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
 155void vfio_pci_write_config(PCIDevice *pdev,
 156                           uint32_t addr, uint32_t val, int len);
 157
 158uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size);
 159void vfio_vga_write(void *opaque, hwaddr addr, uint64_t data, unsigned size);
 160
 161bool vfio_blacklist_opt_rom(VFIOPCIDevice *vdev);
 162void vfio_vga_quirk_setup(VFIOPCIDevice *vdev);
 163void vfio_vga_quirk_exit(VFIOPCIDevice *vdev);
 164void vfio_vga_quirk_finalize(VFIOPCIDevice *vdev);
 165void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr);
 166void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr);
 167void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr);
 168void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev);
 169int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp);
 170
 171extern const PropertyInfo qdev_prop_nv_gpudirect_clique;
 172
 173int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp);
 174
 175int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,
 176                               struct vfio_region_info *info,
 177                               Error **errp);
 178
 179int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp);
 180void vfio_display_finalize(VFIOPCIDevice *vdev);
 181
 182#endif /* HW_VFIO_VFIO_PCI_H */
 183