154 static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word,  in decode_osc_bits()  argument
167 	dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf);  in decode_osc_bits()
170 static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word)  in decode_osc_support()  argument
172 	decode_osc_bits(root, msg, word, pci_osc_support_bit,  in decode_osc_support()
176 static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word)  in decode_osc_control()  argument
178 	decode_osc_bits(root, msg, word, pci_osc_control_bit,  in decode_osc_control()
182 static void decode_cxl_osc_support(struct acpi_pci_root *root, char *msg, u32 word)  in decode_cxl_osc_support()  argument
184 	decode_osc_bits(root, msg, word, cxl_osc_support_bit,  in decode_cxl_osc_support()
188 static void decode_cxl_osc_control(struct acpi_pci_root *root, char *msg, u32 word)  in decode_cxl_osc_control()  argument
190 	decode_osc_bits(root, msg, word, cxl_osc_control_bit,  in decode_cxl_osc_control()
194 static inline bool is_pcie(struct acpi_pci_root *root)  in is_pcie()  argument
196 	return root->bridge_type == ACPI_BRIDGE_TYPE_PCIE;  in is_pcie()
199 static inline bool is_cxl(struct acpi_pci_root *root)  in is_cxl()  argument
201 	return root->bridge_type == ACPI_BRIDGE_TYPE_CXL;  in is_cxl()
207 static char *to_uuid(struct acpi_pci_root *root)  in to_uuid()  argument
209 	if (is_cxl(root))  in to_uuid()
214 static int cap_length(struct acpi_pci_root *root)  in cap_length()  argument
216 	if (is_cxl(root))  in cap_length()
221 static acpi_status acpi_pci_run_osc(struct acpi_pci_root *root,  in acpi_pci_run_osc()  argument
226 		.uuid_str = to_uuid(root),  in acpi_pci_run_osc()
228 		.cap.length = cap_length(root),  in acpi_pci_run_osc()
233 	status = acpi_run_osc(root->device->handle, &context);  in acpi_pci_run_osc()
236 		if (is_cxl(root))  in acpi_pci_run_osc()
243 static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 support,  in acpi_pci_query_osc()  argument
250 	support |= root->osc_support_set;  in acpi_pci_query_osc()
254 	capbuf[OSC_CONTROL_DWORD] = *control | root->osc_control_set;  in acpi_pci_query_osc()
256 	if (is_cxl(root)) {  in acpi_pci_query_osc()
257 		cxl_support |= root->osc_ext_support_set;  in acpi_pci_query_osc()
259 		capbuf[OSC_EXT_CONTROL_DWORD] = *cxl_control | root->osc_ext_control_set;  in acpi_pci_query_osc()
263 	status = acpi_pci_run_osc(root, capbuf, &pci_result, &cxl_result);  in acpi_pci_query_osc()
265 		root->osc_support_set = support;  in acpi_pci_query_osc()
267 		if (is_cxl(root)) {  in acpi_pci_query_osc()
268 			root->osc_ext_support_set = cxl_support;  in acpi_pci_query_osc()
271 	} else if (is_cxl(root)) {  in acpi_pci_query_osc()
276 		root->bridge_type = ACPI_BRIDGE_TYPE_PCIE;  in acpi_pci_query_osc()
285 	struct acpi_pci_root *root;  in acpi_pci_find_root()  local
290 	root = acpi_driver_data(device);  in acpi_pci_find_root()
292 	return root;  in acpi_pci_find_root()
360 	struct acpi_pci_root *root;  in acpi_pci_osc_control_set()  local
367 	root = acpi_pci_find_root(handle);  in acpi_pci_osc_control_set()
368 	if (!root)  in acpi_pci_osc_control_set()
372 	*mask |= root->osc_control_set;  in acpi_pci_osc_control_set()
374 	if (is_cxl(root)) {  in acpi_pci_osc_control_set()
376 		*cxl_mask |= root->osc_ext_control_set;  in acpi_pci_osc_control_set()
383 		status = acpi_pci_query_osc(root, support, mask, cxl_support,  in acpi_pci_osc_control_set()
387 		if (is_cxl(root)) {  in acpi_pci_osc_control_set()
398 			decode_osc_control(root, "platform does not support",  in acpi_pci_osc_control_set()
401 			decode_cxl_osc_control(root, "CXL platform does not support",  in acpi_pci_osc_control_set()
408 	if ((root->osc_control_set & ctrl) == ctrl &&  in acpi_pci_osc_control_set()
409 	    (root->osc_ext_control_set & cxl_ctrl) == cxl_ctrl)  in acpi_pci_osc_control_set()
413 		decode_osc_control(root, "not requesting control; platform does not support",  in acpi_pci_osc_control_set()
419 	capbuf[OSC_SUPPORT_DWORD] = root->osc_support_set;  in acpi_pci_osc_control_set()
421 	if (is_cxl(root)) {  in acpi_pci_osc_control_set()
422 		capbuf[OSC_EXT_SUPPORT_DWORD] = root->osc_ext_support_set;  in acpi_pci_osc_control_set()
426 	status = acpi_pci_run_osc(root, capbuf, mask, cxl_mask);  in acpi_pci_osc_control_set()
430 	root->osc_control_set = *mask;  in acpi_pci_osc_control_set()
431 	root->osc_ext_control_set = *cxl_mask;  in acpi_pci_osc_control_set()
546 static bool os_control_query_checks(struct acpi_pci_root *root, u32 support)  in os_control_query_checks()  argument
548 	struct acpi_device *device = root->device;  in os_control_query_checks()
556 		decode_osc_support(root, "not requesting OS control; OS requires",  in os_control_query_checks()
564 static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm)  in negotiate_os_control()  argument
569 	struct acpi_device *device = root->device;  in negotiate_os_control()
578 		root->osc_control_set = ~OSC_PCI_EXPRESS_PME_CONTROL;  in negotiate_os_control()
579 		decode_osc_control(root, "OS assumes control of",  in negotiate_os_control()
580 				   root->osc_control_set);  in negotiate_os_control()
586 	decode_osc_support(root, "OS supports", support);  in negotiate_os_control()
588 	if (os_control_query_checks(root, support))  in negotiate_os_control()
591 	if (is_cxl(root)) {  in negotiate_os_control()
593 		decode_cxl_osc_support(root, "OS supports", cxl_support);  in negotiate_os_control()
601 			decode_osc_control(root, "OS now controls", control);  in negotiate_os_control()
603 			decode_cxl_osc_control(root, "OS now controls",  in negotiate_os_control()
626 		if (status == AE_NOT_FOUND && !is_pcie(root))  in negotiate_os_control()
630 			decode_osc_control(root, "OS requested", requested);  in negotiate_os_control()
631 			decode_osc_control(root, "platform willing to grant", control);  in negotiate_os_control()
634 			decode_cxl_osc_control(root, "OS requested", cxl_requested);  in negotiate_os_control()
635 			decode_cxl_osc_control(root, "platform willing to grant",  in negotiate_os_control()
650 	struct acpi_pci_root *root;  in acpi_pci_root_add()  local
656 	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);  in acpi_pci_root_add()
657 	if (!root)  in acpi_pci_root_add()
670 	root->secondary.flags = IORESOURCE_BUS;  in acpi_pci_root_add()
671 	status = try_get_root_bridge_busnr(handle, &root->secondary);  in acpi_pci_root_add()
679 		root->secondary.end = 0xFF;  in acpi_pci_root_add()
685 			root->secondary.start = bus;  in acpi_pci_root_add()
687 			root->secondary.start = 0;  in acpi_pci_root_add()
695 	root->device = device;  in acpi_pci_root_add()
696 	root->segment = segment & 0xFFFF;  in acpi_pci_root_add()
699 	device->driver_data = root;  in acpi_pci_root_add()
708 	       root->segment, &root->secondary);  in acpi_pci_root_add()
710 	root->mcfg_addr = acpi_pci_root_get_mcfg_addr(handle);  in acpi_pci_root_add()
712 	acpi_hid = acpi_device_hid(root->device);  in acpi_pci_root_add()
714 		root->bridge_type = ACPI_BRIDGE_TYPE_PCIE;  in acpi_pci_root_add()
716 		root->bridge_type = ACPI_BRIDGE_TYPE_CXL;  in acpi_pci_root_add()
720 	negotiate_os_control(root, &no_aspm);  in acpi_pci_root_add()
733 	root->bus = pci_acpi_scan_root(root);  in acpi_pci_root_add()
734 	if (!root->bus) {  in acpi_pci_root_add()
737 			root->segment, (unsigned int)root->secondary.start);  in acpi_pci_root_add()
747 	device_set_wakeup_capable(root->bus->bridge, device->wakeup.flags.valid);  in acpi_pci_root_add()
750 		pcibios_resource_survey_bus(root->bus);  in acpi_pci_root_add()
751 		pci_assign_unassigned_root_bus_resources(root->bus);  in acpi_pci_root_add()
762 		acpi_ioapic_add(root->device->handle);  in acpi_pci_root_add()
766 	pci_bus_add_devices(root->bus);  in acpi_pci_root_add()
774 	kfree(root);  in acpi_pci_root_add()
780 	struct acpi_pci_root *root = acpi_driver_data(device);  in acpi_pci_root_remove()  local
784 	pci_stop_root_bus(root->bus);  in acpi_pci_root_remove()
786 	pci_ioapic_remove(root);  in acpi_pci_root_remove()
787 	device_set_wakeup_capable(root->bus->bridge, false);  in acpi_pci_root_remove()
790 	pci_remove_root_bus(root->bus);  in acpi_pci_root_remove()
791 	WARN_ON(acpi_ioapic_remove(root));  in acpi_pci_root_remove()
797 	kfree(root);  in acpi_pci_root_remove()
810 	struct resource *res1, *res2, *root = NULL;  in acpi_pci_root_validate_resources()  local
814 	root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;  in acpi_pci_root_validate_resources()
826 		end = min(res1->end, root->end);  in acpi_pci_root_validate_resources()
938 	struct resource *res, *conflict, *root = NULL;  in pci_acpi_root_add_resources()  local
943 			root = &iomem_resource;  in pci_acpi_root_add_resources()
945 			root = &ioport_resource;  in pci_acpi_root_add_resources()
953 		if (res == root)  in pci_acpi_root_add_resources()
956 		conflict = insert_resource_conflict(root, res);  in pci_acpi_root_add_resources()
1001 struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,  in acpi_pci_root_create()  argument
1006 	int ret, busnum = root->secondary.start;  in acpi_pci_root_create()
1007 	struct acpi_device *device = root->device;  in acpi_pci_root_create()
1013 	info->root = root;  in acpi_pci_root_create()
1018 		 root->segment, busnum);  in acpi_pci_root_create()
1030 	pci_add_resource(&info->resources, &root->secondary);  in acpi_pci_root_create()
1037 	if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))  in acpi_pci_root_create()
1039 	if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL))  in acpi_pci_root_create()
1041 	if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL))  in acpi_pci_root_create()
1043 	if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL))  in acpi_pci_root_create()
1045 	if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL))  in acpi_pci_root_create()
1047 	if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL))  in acpi_pci_root_create()
1050 	if (!(root->osc_ext_control_set & OSC_CXL_ERROR_REPORTING_CONTROL))  in acpi_pci_root_create()