s390/pci/pci_bus.c

36  * The PCI resources for the function are set up and added to its zbus and the
37  * function is enabled. The function must be added to a zbus which must have
56 				pci_bus_add_resource(zdev->zbus->bus, zdev->bars[i].res, 0);
79 	pdev = pci_scan_single_device(zdev->zbus->bus, zdev->devfn);
101 	struct zpci_bus *zbus = zdev->zbus;
104 	if (!zdev->zbus->bus)
107 	pdev = pci_get_slot(zbus->bus, zdev->devfn);
124  * @zbus: the zbus to be scanned
132 int zpci_bus_scan_bus(struct zpci_bus *zbus)
138 		zdev = zbus->function[devfn];
147 	pci_scan_child_bus(zbus->bus);
148 	pci_bus_add_devices(zbus->bus);
161 	struct zpci_bus *zbus = NULL;
164 	list_for_each_entry(zbus, &zbus_list, bus_next) {
165 		zpci_bus_scan_bus(zbus);
171 /* zpci_bus_create_pci_bus - Create the PCI bus associated with this zbus
172  * @zbus: the zbus holding the zdevices
181 static int zpci_bus_create_pci_bus(struct zpci_bus *zbus, struct zpci_dev *fr, struct pci_ops *ops)
190 	zbus->domain_nr = domain;
191 	zbus->multifunction = fr->rid_available;
192 	zbus->max_bus_speed = fr->max_bus_speed;
195 	 * Note that the zbus->resources are taken over and zbus->resources
198 	bus = pci_create_root_bus(NULL, ZPCI_BUS_NR, ops, zbus, &zbus->resources);
200 		zpci_free_domain(zbus->domain_nr);
204 	zbus->bus = bus;
211 	struct zpci_bus *zbus = container_of(kref, struct zpci_bus, kref);
213 	if (zbus->bus) {
215 		pci_stop_root_bus(zbus->bus);
217 		zpci_free_domain(zbus->domain_nr);
218 		pci_free_resource_list(&zbus->resources);
220 		pci_remove_root_bus(zbus->bus);
225 	list_del(&zbus->bus_next);
227 	kfree(zbus);
230 static void zpci_bus_put(struct zpci_bus *zbus)
232 	kref_put(&zbus->kref, zpci_bus_release);
237 	struct zpci_bus *zbus;
240 	list_for_each_entry(zbus, &zbus_list, bus_next) {
241 		if (pchid == zbus->pchid) {
242 			kref_get(&zbus->kref);
246 	zbus = NULL;
249 	return zbus;
254 	struct zpci_bus *zbus;
256 	zbus = kzalloc(sizeof(*zbus), GFP_KERNEL);
257 	if (!zbus)
260 	zbus->pchid = pchid;
261 	INIT_LIST_HEAD(&zbus->bus_next);
263 	list_add_tail(&zbus->bus_next, &zbus_list);
266 	kref_init(&zbus->kref);
267 	INIT_LIST_HEAD(&zbus->resources);
269 	zbus->bus_resource.start = 0;
270 	zbus->bus_resource.end = ZPCI_BUS_NR;
271 	zbus->bus_resource.flags = IORESOURCE_BUS;
272 	pci_add_resource(&zbus->resources, &zbus->bus_resource);
274 	return zbus;
286 		zpci_iov_setup_virtfn(zdev->zbus, pdev, zdev->vfn);
291 static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
295 	if (zbus->function[zdev->devfn]) {
300 	zdev->zbus = zbus;
301 	zbus->function[zdev->devfn] = zdev;
304 	if (zbus->multifunction && !zdev->rid_available) {
316 	zbus->function[zdev->devfn] = NULL;
317 	zdev->zbus = NULL;
324 	struct zpci_bus *zbus = NULL;
337 		zbus = zpci_bus_get(zdev->pchid);
339 	if (!zbus) {
340 		zbus = zpci_bus_alloc(zdev->pchid);
341 		if (!zbus)
345 	if (!zbus->bus) {
350 		rc = zpci_bus_create_pci_bus(zbus, zdev, ops);
355 	rc = zpci_bus_add_device(zbus, zdev);
363 	zpci_bus_put(zbus);
369 	struct zpci_bus *zbus = zdev->zbus;
372 	zbus->function[zdev->devfn] = NULL;
373 	zpci_bus_put(zbus);