1 // SPDX-License-Identifier: GPL-2.0-only
3  *  pci_slot.c - ACPI PCI Slot Driver
10  *  Copyright (C) 2007-2008 Hewlett-Packard Development Company, L.P.
27 #include <linux/pci-acpi.h>
42 check_slot(acpi_handle handle, unsigned long long *sun)  in check_slot()  argument
44 	int device = -1;  in check_slot()  local
49 	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);  in check_slot()
54 		status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);  in check_slot()
59 	status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);  in check_slot()
67 	status = acpi_evaluate_integer(handle, "_SUN", NULL, sun);  in check_slot()
74 	device = (adr >> 16) & 0xffff;  in check_slot()
77 	return device;  in check_slot()
81  * Check whether handle has an associated slot and create PCI slot if it has.
84 register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)  in register_slot()  argument
86 	int device;  in register_slot()  local
93 	device = check_slot(handle, &sun);  in register_slot()
94 	if (device < 0)  in register_slot()
99 	 * Check whether PCI slot has already been created for this PCI device.  in register_slot()
102 		pci_slot = slot->pci_slot;  in register_slot()
103 		if (pci_slot->bus == pci_bus && pci_slot->number == device)  in register_slot()
112 	pci_slot = pci_create_slot(pci_bus, device, name, NULL);  in register_slot()
119 	slot->pci_slot = pci_slot;  in register_slot()
120 	list_add(&slot->list, &slot_list);  in register_slot()
122 	get_device(&pci_bus->dev);  in register_slot()
124 	pr_debug("%p, pci_bus: %x, device: %d, name: %s\n",  in register_slot()
125 		 pci_slot, pci_bus->number, device, name);  in register_slot()
132 	acpi_handle handle = ACPI_HANDLE(bus->bridge);  in acpi_pci_slot_enumerate()  local
134 	if (handle) {  in acpi_pci_slot_enumerate()
136 		acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,  in acpi_pci_slot_enumerate()
148 		if (slot->pci_slot->bus == bus) {  in acpi_pci_slot_remove()
149 			list_del(&slot->list);  in acpi_pci_slot_remove()
150 			pci_destroy_slot(slot->pci_slot);  in acpi_pci_slot_remove()
151 			put_device(&bus->dev);  in acpi_pci_slot_remove()
161 		d->ident);  in do_sta_before_sun()