int vpci_bus_init(void)
{
struct pci_dev *pcidev = NULL;
sysdata = kzalloc(sizeof(void *), GFP_KERNEL);
vbus = pci_scan_bus_parented(NULL, 2, & vpci_ops, sysdata);
//vbus = pci_create_root_bus(NULL,i,& vpci_ops, sysdata,NULL);
//if (vbus != NULL)
//break;
memset(sysdata, 0, sizeof(void *));
if (vbus == NULL) {
kfree(sysdata);
return -EINVAL;
}
if (pci_register_driver(& vpci_vdev_driver) < 0) {
pci_remove_bus(vbus);
vbus = NULL;
return -EINVAL;
}
pcidev = pci_scan_single_device(vbus, 0);
if (pcidev == NULL)
return 0;
else
pci_dev_get(pcidev);
pci_bus_add_devices(vbus);
return 0;
}
void vpci_bus_remove(void)
{
if (vbus) {
pci_unregister_driver(&vpci_vdev_driver);
device_unregister(vbus->bridge);
pci_remove_bus(vbus);
kfree(sysdata);
vbus = NULL;
}
}
static void pci_remove_bus_device(struct pci_dev *dev)
{
struct pci_bus *bus = dev->subordinate;
struct pci_dev *child, *tmp;
if (bus) {
list_for_each_entry_safe(child, tmp,
&bus->devices, bus_list)
pci_remove_bus_device(child);
pci_remove_bus(bus);
dev->subordinate = NULL;
}
pci_destroy_dev(dev);
}
void pci_remove_root_bus(struct pci_bus *bus)
{
struct pci_dev *child, *tmp;
struct pci_host_bridge *host_bridge;
if (!pci_is_root_bus(bus))
return;
host_bridge = to_pci_host_bridge(bus->bridge);
list_for_each_entry_safe(child, tmp,
&bus->devices, bus_list)
pci_remove_bus_device(child);
pci_remove_bus(bus);
host_bridge->bus = NULL;
/* remove the host bridge */
device_unregister(&host_bridge->dev);
}
