include/hw/pci/pci_bus.h

   1 #ifndef QEMU_PCI_BUS_H
   2 #define QEMU_PCI_BUS_H
   3
   4 #include "hw/pci/pci.h"
   5
   6 /*
   7  * PCI Bus datastructures.
   8  *
   9  * Do not access the following members directly;
  10  * use accessor functions in pci.h
  11  */
  12
  13 struct PCIBusClass {
  14     /*< private >*/
  15     BusClass parent_class;
  16     /*< public >*/
  17
  18     int (*bus_num)(PCIBus *bus);
  19     uint16_t (*numa_node)(PCIBus *bus);
  20 };
  21
  22 enum PCIBusFlags {
  23     /* This bus is the root of a PCI domain */
  24     PCI_BUS_IS_ROOT                                         = 0x0001,
  25     /* PCIe extended configuration space is accessible on this bus */
  26     PCI_BUS_EXTENDED_CONFIG_SPACE                           = 0x0002,
  27     /* This is a CXL Type BUS */
  28     PCI_BUS_CXL                                             = 0x0004,
  29 };
  30
  31 #define PCI_NO_PASID UINT32_MAX
  32
  33 struct PCIBus {
  34     BusState qbus;
  35     enum PCIBusFlags flags;
  36     const PCIIOMMUOps *iommu_ops;
  37     void *iommu_opaque;
  38     uint8_t devfn_min;
  39     uint32_t slot_reserved_mask;
  40     pci_set_irq_fn set_irq;
  41     pci_map_irq_fn map_irq;
  42     pci_route_irq_fn route_intx_to_irq;
  43     void *irq_opaque;
  44     PCIDevice *devices[PCI_SLOT_MAX * PCI_FUNC_MAX];
  45     PCIDevice *parent_dev;
  46     MemoryRegion *address_space_mem;
  47     MemoryRegion *address_space_io;
  48
  49     QLIST_HEAD(, PCIBus) child; /* this will be replaced by qdev later */
  50     QLIST_ENTRY(PCIBus) sibling;/* this will be replaced by qdev later */
  51
  52     /* The bus IRQ state is the logical OR of the connected devices.
  53        Keep a count of the number of devices with raised IRQs.  */
  54     int nirq;
  55     int *irq_count;
  56
  57     Notifier machine_done;
  58 };
  59
  60 static inline bool pci_bus_is_cxl(PCIBus *bus)
  61 {
  62     return !!(bus->flags & PCI_BUS_CXL);
  63 }
  64
  65 static inline bool pci_bus_is_root(PCIBus *bus)
  66 {
  67     return !!(bus->flags & PCI_BUS_IS_ROOT);
  68 }
  69
  70 static inline bool pci_bus_allows_extended_config_space(PCIBus *bus)
  71 {
  72     return !!(bus->flags & PCI_BUS_EXTENDED_CONFIG_SPACE);
  73 }
  74
  75 #endif /* QEMU_PCI_BUS_H */