161 static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word,  in decode_osc_bits()  argument
174 	dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf);  in decode_osc_bits()
177 static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word)  in decode_osc_support()  argument
179 	decode_osc_bits(root, msg, word, pci_osc_support_bit,  in decode_osc_support()
183 static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word)  in decode_osc_control()  argument
185 	decode_osc_bits(root, msg, word, pci_osc_control_bit,  in decode_osc_control()
210 static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,  in acpi_pci_query_osc()  argument
218 	support |= root->osc_support_set;  in acpi_pci_query_osc()
224 		capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set;  in acpi_pci_query_osc()
227 		capbuf[OSC_CONTROL_DWORD] = root->osc_control_set;  in acpi_pci_query_osc()
230 	status = acpi_pci_run_osc(root->device->handle, capbuf, &result);  in acpi_pci_query_osc()
232 		root->osc_support_set = support;  in acpi_pci_query_osc()
239 static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)  in acpi_pci_osc_support()  argument
244 	status = acpi_pci_query_osc(root, flags, NULL);  in acpi_pci_osc_support()
251 	struct acpi_pci_root *root;  in acpi_pci_find_root()  local
258 	root = acpi_driver_data(device);  in acpi_pci_find_root()
260 	return root;  in acpi_pci_find_root()
290 	struct acpi_pci_root *root;  in acpi_get_pci_dev()  local
311 	root = acpi_pci_find_root(phandle);  in acpi_get_pci_dev()
312 	if (!root)  in acpi_get_pci_dev()
315 	pbus = root->bus;  in acpi_get_pci_dev()
373 	struct acpi_pci_root *root;  in acpi_pci_osc_control_set()  local
384 	root = acpi_pci_find_root(handle);  in acpi_pci_osc_control_set()
385 	if (!root)  in acpi_pci_osc_control_set()
390 	*mask = ctrl | root->osc_control_set;  in acpi_pci_osc_control_set()
392 	if ((root->osc_control_set & ctrl) == ctrl)  in acpi_pci_osc_control_set()
397 		status = acpi_pci_query_osc(root, root->osc_support_set, mask);  in acpi_pci_osc_control_set()
402 		decode_osc_control(root, "platform does not support",  in acpi_pci_osc_control_set()
408 		decode_osc_control(root, "not requesting control; platform does not support",  in acpi_pci_osc_control_set()
415 	capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set;  in acpi_pci_osc_control_set()
419 		root->osc_control_set = *mask;  in acpi_pci_osc_control_set()
426 static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm)  in negotiate_os_control()  argument
430 	struct acpi_device *device = root->device;  in negotiate_os_control()
440 		root->osc_control_set = ~OSC_PCI_EXPRESS_PME_CONTROL;  in negotiate_os_control()
441 		decode_osc_control(root, "OS assumes control of",  in negotiate_os_control()
442 				   root->osc_control_set);  in negotiate_os_control()
458 	decode_osc_support(root, "OS supports", support);  in negotiate_os_control()
459 	status = acpi_pci_osc_support(root, support);  in negotiate_os_control()
473 		decode_osc_support(root, "not requesting OS control; OS requires",  in negotiate_os_control()
494 		decode_osc_control(root, "OS now controls", control);  in negotiate_os_control()
505 		decode_osc_control(root, "OS requested", requested);  in negotiate_os_control()
506 		decode_osc_control(root, "platform willing to grant", control);  in negotiate_os_control()
527 	struct acpi_pci_root *root;  in acpi_pci_root_add()  local
532 	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);  in acpi_pci_root_add()
533 	if (!root)  in acpi_pci_root_add()
546 	root->secondary.flags = IORESOURCE_BUS;  in acpi_pci_root_add()
547 	status = try_get_root_bridge_busnr(handle, &root->secondary);  in acpi_pci_root_add()
555 		root->secondary.end = 0xFF;  in acpi_pci_root_add()
561 			root->secondary.start = bus;  in acpi_pci_root_add()
563 			root->secondary.start = 0;  in acpi_pci_root_add()
571 	root->device = device;  in acpi_pci_root_add()
572 	root->segment = segment & 0xFFFF;  in acpi_pci_root_add()
575 	device->driver_data = root;  in acpi_pci_root_add()
584 	       root->segment, &root->secondary);  in acpi_pci_root_add()
586 	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle);  in acpi_pci_root_add()
588 	negotiate_os_control(root, &no_aspm);  in acpi_pci_root_add()
601 	root->bus = pci_acpi_scan_root(root);  in acpi_pci_root_add()
602 	if (!root->bus) {  in acpi_pci_root_add()
605 			root->segment, (unsigned int)root->secondary.start);  in acpi_pci_root_add()
616 		device_set_run_wake(root->bus->bridge, true);  in acpi_pci_root_add()
619 		pcibios_resource_survey_bus(root->bus);  in acpi_pci_root_add()
620 		pci_assign_unassigned_root_bus_resources(root->bus);  in acpi_pci_root_add()
621 		acpi_ioapic_add(root);  in acpi_pci_root_add()
625 	pci_bus_add_devices(root->bus);  in acpi_pci_root_add()
633 	kfree(root);  in acpi_pci_root_add()
639 	struct acpi_pci_root *root = acpi_driver_data(device);  in acpi_pci_root_remove()  local
643 	pci_stop_root_bus(root->bus);  in acpi_pci_root_remove()
645 	WARN_ON(acpi_ioapic_remove(root));  in acpi_pci_root_remove()
647 	device_set_run_wake(root->bus->bridge, false);  in acpi_pci_root_remove()
650 	pci_remove_root_bus(root->bus);  in acpi_pci_root_remove()
656 	kfree(root);  in acpi_pci_root_remove()