struct pci_bus * __devinit pcibios_scan_root(int busnum) { struct pci_bus *bus = NULL; struct pci_sysdata *sd; while ((bus = pci_find_next_bus(bus)) != NULL) { if (bus->number == busnum) { /* Already scanned */ return bus; } } /* Allocate per-root-bus (not per bus) arch-specific data. * TODO: leak; this memory is never freed. * It's arguable whether it's worth the trouble to care. */ sd = kzalloc(sizeof(*sd), GFP_KERNEL); if (!sd) { printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); return NULL; } sd->node = get_mp_bus_to_node(busnum); printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum); bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd); if (!bus) kfree(sd); return bus; }
struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int bus) { struct pci_root_info info; struct pci_controller *controller; unsigned int windows = 0; struct pci_bus *pbus; char *name; int pxm; controller = alloc_pci_controller(domain); if (!controller) goto out1; controller->acpi_handle = device->handle; pxm = acpi_get_pxm(controller->acpi_handle); #ifdef CONFIG_NUMA if (pxm >= 0) controller->node = pxm_to_node(pxm); #endif acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window, &windows); if (windows) { controller->window = kmalloc_node(sizeof(*controller->window) * windows, GFP_KERNEL, controller->node); if (!controller->window) goto out2; } name = kmalloc(16, GFP_KERNEL); if (!name) goto out3; sprintf(name, "PCI Bus %04x:%02x", domain, bus); info.controller = controller; info.name = name; acpi_walk_resources(device->handle, METHOD_NAME__CRS, add_window, &info); /* * See arch/x86/pci/acpi.c. * The desired pci bus might already be scanned in a quirk. We * should handle the case here, but it appears that IA64 hasn't * such quirk. So we just ignore the case now. */ pbus = pci_scan_bus_parented(NULL, bus, &pci_root_ops, controller); if (pbus) pcibios_setup_root_windows(pbus, controller); return pbus; out3: kfree(controller->window); out2: kfree(controller); out1: return NULL; }
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; }
struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int bus) { struct pci_root_info info; struct pci_controller *controller; unsigned int windows = 0; struct pci_bus *pbus; char *name; int pxm; controller = alloc_pci_controller(domain); if (!controller) goto out1; controller->acpi_handle = device->handle; pxm = acpi_get_pxm(controller->acpi_handle); #ifdef CONFIG_NUMA if (pxm >= 0) controller->node = pxm_to_node(pxm); #endif acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window, &windows); controller->window = kmalloc_node(sizeof(*controller->window) * windows, GFP_KERNEL, controller->node); if (!controller->window) goto out2; name = kmalloc(16, GFP_KERNEL); if (!name) goto out3; sprintf(name, "PCI Bus %04x:%02x", domain, bus); info.controller = controller; info.name = name; acpi_walk_resources(device->handle, METHOD_NAME__CRS, add_window, &info); pbus = pci_scan_bus_parented(NULL, bus, &pci_root_ops, controller); if (pbus) pcibios_setup_root_windows(pbus, controller); return pbus; out3: kfree(controller->window); out2: kfree(controller); out1: return NULL; }