From: Marcel Apfelbaum marcel.a@redhat.com
Refactoring it as a method of PCIBusClass will allow different implementations for subclasses.
Removed the assumption that the root bus does not have a parent device because is specific only to the default class implementation.
Signed-off-by: Marcel Apfelbaum marcel@redhat.com --- hw/pci/pci.c | 11 ++++------- hw/pci/pci_bus.c | 9 +++++++++ hw/vfio/pci.c | 1 + include/hw/pci/pci.h | 1 - include/hw/pci/pci_bus.h | 15 +++++++++++++++ 5 files changed, 29 insertions(+), 8 deletions(-)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 933ef65..0b4e138 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -204,7 +204,10 @@ PCIBus *pci_device_root_bus(const PCIDevice *d) { PCIBus *bus = d->bus;
- while ((d = bus->parent_dev) != NULL) { + while (!pci_bus_is_root(bus)) { + d = bus->parent_dev; + assert(d != NULL); + bus = d->bus; }
@@ -217,7 +220,6 @@ const char *pci_root_bus_path(PCIDevice *dev) PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent); PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge);
- assert(!rootbus->parent_dev); assert(host_bridge->bus == rootbus);
if (hc->root_bus_path) { @@ -249,11 +251,6 @@ bool pci_bus_is_express(PCIBus *bus) return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS); }
-bool pci_bus_is_root(PCIBus *bus) -{ - return !bus->parent_dev; -} - void pci_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent, const char *name, MemoryRegion *address_space_mem, diff --git a/hw/pci/pci_bus.c b/hw/pci/pci_bus.c index d156194..0922a75 100644 --- a/hw/pci/pci_bus.c +++ b/hw/pci/pci_bus.c @@ -464,9 +464,15 @@ static void pcibus_reset(BusState *qbus) } }
+static bool pcibus_is_root(PCIBus *bus) +{ + return !bus->parent_dev; +} + static void pci_bus_class_init(ObjectClass *klass, void *data) { BusClass *k = BUS_CLASS(klass); + PCIBusClass *pbc = PCI_BUS_CLASS(klass);
k->print_dev = pcibus_dev_print; k->get_dev_path = pcibus_get_dev_path; @@ -474,11 +480,14 @@ static void pci_bus_class_init(ObjectClass *klass, void *data) k->realize = pci_bus_realize; k->unrealize = pci_bus_unrealize; k->reset = pcibus_reset; + + pbc->is_root = pcibus_is_root; }
static const TypeInfo pci_bus_info = { .name = TYPE_PCI_BUS, .parent = TYPE_BUS, + .class_size = sizeof(PCIBusClass), .instance_size = sizeof(PCIBus), .class_init = pci_bus_class_init, }; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 014a92c..a6f3179 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -32,6 +32,7 @@ #include "hw/pci/msi.h" #include "hw/pci/msix.h" #include "hw/pci/pci.h" +#include "hw/pci/pci_bus.h" #include "qemu-common.h" #include "qemu/error-report.h" #include "qemu/event_notifier.h" diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index 966e9cd..7b2567a 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -338,7 +338,6 @@ typedef PCIINTxRoute (*pci_route_irq_fn)(void *opaque, int pin); #define TYPE_PCIE_BUS "PCIE"
bool pci_bus_is_express(PCIBus *bus); -bool pci_bus_is_root(PCIBus *bus); void pci_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent, const char *name, MemoryRegion *address_space_mem, diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h index ea427a3..306ef10 100644 --- a/include/hw/pci/pci_bus.h +++ b/include/hw/pci/pci_bus.h @@ -15,6 +15,16 @@ PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num);
#define TYPE_PCI_BUS "PCI" #define PCI_BUS(obj) OBJECT_CHECK(PCIBus, (obj), TYPE_PCI_BUS) +#define PCI_BUS_CLASS(klass) OBJECT_CLASS_CHECK(PCIBusClass, (klass), TYPE_PCI_BUS) +#define PCI_BUS_GET_CLASS(obj) OBJECT_GET_CLASS(PCIBusClass, (obj), TYPE_PCI_BUS) + +typedef struct PCIBusClass { + /*< private >*/ + BusClass parent_class; + /*< public >*/ + + bool (*is_root)(PCIBus *bus); +} PCIBusClass;
struct PCIBus { BusState qbus; @@ -39,6 +49,11 @@ struct PCIBus { int *irq_count; };
+static inline bool pci_bus_is_root(PCIBus *bus) +{ + return PCI_BUS_GET_CLASS(bus)->is_root(bus); +} + typedef struct PCIBridgeWindows PCIBridgeWindows;
/*