hw/vfio_pci_int.h

   1 /*
   2  * vfio based device assignment support
   3  *
   4  * Copyright Red Hat, Inc. 2012
   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
  13 #ifndef HW_VFIO_PCI_INT_H
  14 #define HW_VFIO_PCI_INT_H
  15
  16 #include "qemu-common.h"
  17 #include "qemu-queue.h"
  18 #include "pci.h"
  19 #include "event_notifier.h"
  20
  21 typedef struct VFIOBAR {
  22     off_t fd_offset; /* offset of BAR within device fd */
  23     int fd; /* device fd, allows us to pass VFIOBAR as opaque data */
  24     MemoryRegion mem; /* slow, read/write access */
  25     MemoryRegion mmap_mem; /* direct mapped access */
  26     void *mmap;
  27     size_t size;
  28     uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
  29     uint8_t nr; /* cache the BAR number for debug */
  30 } VFIOBAR;
  31
  32 typedef struct VFIOINTx {
  33     bool pending; /* interrupt pending */
  34     bool kvm_accel; /* set when QEMU bypass through KVM enabled */
  35     uint8_t pin; /* which pin to pull for qemu_set_irq */
  36     EventNotifier interrupt; /* eventfd triggered on interrupt */
  37     EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
  38     PCIINTxRoute route; /* routing info for QEMU bypass */
  39     bool disabled;
  40     char *intx;
  41 } VFIOINTx;
  42
  43 struct VFIODevice;
  44
  45 typedef struct VFIOMSIVector {
  46     EventNotifier interrupt; /* eventfd triggered on interrupt */
  47     struct VFIODevice *vdev; /* back pointer to device */
  48     int virq; /* KVM irqchip route for QEMU bypass */
  49     bool use;
  50 } VFIOMSIVector;
  51
  52 enum {
  53     VFIO_INT_NONE = 0,
  54     VFIO_INT_INTx = 1,
  55     VFIO_INT_MSI  = 2,
  56     VFIO_INT_MSIX = 3,
  57 };
  58
  59 struct VFIOGroup;
  60
  61 typedef struct VFIOContainer {
  62     int fd; /* /dev/vfio/vfio, empowered by the attached groups */
  63     struct {
  64         /* enable abstraction to support various iommu backends */
  65         union {
  66             MemoryListener listener; /* Used by type1 iommu */
  67         };
  68         void (*release)(struct VFIOContainer *);
  69     } iommu_data;
  70     QLIST_HEAD(, VFIOGroup) group_list;
  71     QLIST_ENTRY(VFIOContainer) next;
  72 } VFIOContainer;
  73
  74 /* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
  75 typedef struct VFIOMSIXInfo {
  76     uint8_t table_bar;
  77     uint8_t pba_bar;
  78     uint16_t entries;
  79     uint32_t table_offset;
  80     uint32_t pba_offset;
  81     MemoryRegion mmap_mem;
  82     void *mmap;
  83 } VFIOMSIXInfo;
  84
  85 typedef struct VFIODevice {
  86     PCIDevice pdev;
  87     int fd;
  88     VFIOINTx intx;
  89     unsigned int config_size;
  90     off_t config_offset; /* Offset of config space region within device fd */
  91     unsigned int rom_size;
  92     off_t rom_offset; /* Offset of ROM region within device fd */
  93     int msi_cap_size;
  94     VFIOMSIVector *msi_vectors;
  95     VFIOMSIXInfo *msix;
  96     int nr_vectors; /* Number of MSI/MSIX vectors currently in use */
  97     int interrupt; /* Current interrupt type */
  98     VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */
  99     PCIHostDeviceAddress host;
 100     QLIST_ENTRY(VFIODevice) next;
 101     struct VFIOGroup *group;
 102     bool reset_works;
 103 } VFIODevice;
 104
 105 typedef struct VFIOGroup {
 106     int fd;
 107     int groupid;
 108     VFIOContainer *container;
 109     QLIST_HEAD(, VFIODevice) device_list;
 110     QLIST_ENTRY(VFIOGroup) next;
 111     QLIST_ENTRY(VFIOGroup) container_next;
 112 } VFIOGroup;
 113
 114 #endif /* HW_VFIO_PCI_INT_H */