157 static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word,  in decode_osc_bits()  argument
170 	dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf);  in decode_osc_bits()
173 static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word)  in decode_osc_support()  argument
175 	decode_osc_bits(root, msg, word, pci_osc_support_bit,  in decode_osc_support()
179 static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word)  in decode_osc_control()  argument
181 	decode_osc_bits(root, msg, word, pci_osc_control_bit,  in decode_osc_control()
206 static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,  in acpi_pci_query_osc()  argument
214 	support |= root->osc_support_set;  in acpi_pci_query_osc()
220 		capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set;  in acpi_pci_query_osc()
223 		capbuf[OSC_CONTROL_DWORD] = root->osc_control_set;  in acpi_pci_query_osc()
226 	status = acpi_pci_run_osc(root->device->handle, capbuf, &result);  in acpi_pci_query_osc()
228 		root->osc_support_set = support;  in acpi_pci_query_osc()
235 static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)  in acpi_pci_osc_support()  argument
240 	status = acpi_pci_query_osc(root, flags, NULL);  in acpi_pci_osc_support()
247 	struct acpi_pci_root *root;  in acpi_pci_find_root()  local
254 	root = acpi_driver_data(device);  in acpi_pci_find_root()
256 	return root;  in acpi_pci_find_root()
286 	struct acpi_pci_root *root;  in acpi_get_pci_dev()  local
307 	root = acpi_pci_find_root(phandle);  in acpi_get_pci_dev()
308 	if (!root)  in acpi_get_pci_dev()
311 	pbus = root->bus;  in acpi_get_pci_dev()
369 	struct acpi_pci_root *root;  in acpi_pci_osc_control_set()  local
380 	root = acpi_pci_find_root(handle);  in acpi_pci_osc_control_set()
381 	if (!root)  in acpi_pci_osc_control_set()
386 	*mask = ctrl | root->osc_control_set;  in acpi_pci_osc_control_set()
388 	if ((root->osc_control_set & ctrl) == ctrl)  in acpi_pci_osc_control_set()
393 		status = acpi_pci_query_osc(root, root->osc_support_set, mask);  in acpi_pci_osc_control_set()
398 		decode_osc_control(root, "platform does not support",  in acpi_pci_osc_control_set()
404 		decode_osc_control(root, "not requesting control; platform does not support",  in acpi_pci_osc_control_set()
411 	capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set;  in acpi_pci_osc_control_set()
415 		root->osc_control_set = *mask;  in acpi_pci_osc_control_set()
422 static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm)  in negotiate_os_control()  argument
426 	struct acpi_device *device = root->device;  in negotiate_os_control()
436 		root->osc_control_set = ~OSC_PCI_EXPRESS_PME_CONTROL;  in negotiate_os_control()
437 		decode_osc_control(root, "OS assumes control of",  in negotiate_os_control()
438 				   root->osc_control_set);  in negotiate_os_control()
454 	decode_osc_support(root, "OS supports", support);  in negotiate_os_control()
455 	status = acpi_pci_osc_support(root, support);  in negotiate_os_control()
469 		decode_osc_support(root, "not requesting OS control; OS requires",  in negotiate_os_control()
490 		decode_osc_control(root, "OS now controls", control);  in negotiate_os_control()
501 		decode_osc_control(root, "OS requested", requested);  in negotiate_os_control()
502 		decode_osc_control(root, "platform willing to grant", control);  in negotiate_os_control()
523 	struct acpi_pci_root *root;  in acpi_pci_root_add()  local
528 	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);  in acpi_pci_root_add()
529 	if (!root)  in acpi_pci_root_add()
542 	root->secondary.flags = IORESOURCE_BUS;  in acpi_pci_root_add()
543 	status = try_get_root_bridge_busnr(handle, &root->secondary);  in acpi_pci_root_add()
551 		root->secondary.end = 0xFF;  in acpi_pci_root_add()
557 			root->secondary.start = bus;  in acpi_pci_root_add()
559 			root->secondary.start = 0;  in acpi_pci_root_add()
567 	root->device = device;  in acpi_pci_root_add()
568 	root->segment = segment & 0xFFFF;  in acpi_pci_root_add()
571 	device->driver_data = root;  in acpi_pci_root_add()
580 	       root->segment, &root->secondary);  in acpi_pci_root_add()
582 	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle);  in acpi_pci_root_add()
584 	negotiate_os_control(root, &no_aspm);  in acpi_pci_root_add()
597 	root->bus = pci_acpi_scan_root(root);  in acpi_pci_root_add()
598 	if (!root->bus) {  in acpi_pci_root_add()
601 			root->segment, (unsigned int)root->secondary.start);  in acpi_pci_root_add()
612 		device_set_run_wake(root->bus->bridge, true);  in acpi_pci_root_add()
615 		pcibios_resource_survey_bus(root->bus);  in acpi_pci_root_add()
616 		pci_assign_unassigned_root_bus_resources(root->bus);  in acpi_pci_root_add()
617 		acpi_ioapic_add(root);  in acpi_pci_root_add()
621 	pci_bus_add_devices(root->bus);  in acpi_pci_root_add()
629 	kfree(root);  in acpi_pci_root_add()
635 	struct acpi_pci_root *root = acpi_driver_data(device);  in acpi_pci_root_remove()  local
639 	pci_stop_root_bus(root->bus);  in acpi_pci_root_remove()
641 	WARN_ON(acpi_ioapic_remove(root));  in acpi_pci_root_remove()
643 	device_set_run_wake(root->bus->bridge, false);  in acpi_pci_root_remove()
646 	pci_remove_root_bus(root->bus);  in acpi_pci_root_remove()
652 	kfree(root);  in acpi_pci_root_remove()
665 	struct resource *res1, *res2, *root = NULL;  in acpi_pci_root_validate_resources()  local
669 	root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;  in acpi_pci_root_validate_resources()
681 		end = min(res1->end, root->end);  in acpi_pci_root_validate_resources()
760 	struct resource *res, *conflict, *root = NULL;  in pci_acpi_root_add_resources()  local
765 			root = &iomem_resource;  in pci_acpi_root_add_resources()
767 			root = &ioport_resource;  in pci_acpi_root_add_resources()
775 		if (res == root)  in pci_acpi_root_add_resources()
778 		conflict = insert_resource_conflict(root, res);  in pci_acpi_root_add_resources()
821 struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,  in acpi_pci_root_create()  argument
826 	int ret, busnum = root->secondary.start;  in acpi_pci_root_create()
827 	struct acpi_device *device = root->device;  in acpi_pci_root_create()
831 	info->root = root;  in acpi_pci_root_create()
836 		 root->segment, busnum);  in acpi_pci_root_create()
848 	pci_add_resource(&info->resources, &root->secondary);  in acpi_pci_root_create()