blob: 99ffbd478b29c5ffd74d4593ddab6625b2b7fc9d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/pci.h>
2#include <linux/module.h>
3#include "pci.h"
4
5static void pci_free_resources(struct pci_dev *dev)
6{
7 int i;
8
9 msi_remove_pci_irq_vectors(dev);
10
11 pci_cleanup_rom(dev);
12 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
13 struct resource *res = dev->resource + i;
14 if (res->parent)
15 release_resource(res);
16 }
17}
18
19static void pci_destroy_dev(struct pci_dev *dev)
20{
Rajesh Shah091ca9f2005-04-28 00:25:49 -070021 if (!list_empty(&dev->global_list)) {
22 pci_proc_detach_device(dev);
23 pci_remove_sysfs_dev_files(dev);
24 device_unregister(&dev->dev);
Zhang Yanmind71374d2006-06-02 12:35:43 +080025 down_write(&pci_bus_sem);
Rajesh Shah091ca9f2005-04-28 00:25:49 -070026 list_del(&dev->global_list);
27 dev->global_list.next = dev->global_list.prev = NULL;
Zhang Yanmind71374d2006-06-02 12:35:43 +080028 up_write(&pci_bus_sem);
Rajesh Shah091ca9f2005-04-28 00:25:49 -070029 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31 /* Remove the device from the device lists, and prevent any further
32 * list accesses from this device */
Zhang Yanmind71374d2006-06-02 12:35:43 +080033 down_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 list_del(&dev->bus_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 dev->bus_list.next = dev->bus_list.prev = NULL;
Zhang Yanmind71374d2006-06-02 12:35:43 +080036 up_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38 pci_free_resources(dev);
39 pci_dev_put(dev);
40}
41
42/**
43 * pci_remove_device_safe - remove an unused hotplug device
44 * @dev: the device to remove
45 *
46 * Delete the device structure from the device lists and
47 * notify userspace (/sbin/hotplug), but only if the device
48 * in question is not being used by a driver.
49 * Returns 0 on success.
50 */
Adrian Bunk54c762f2005-12-22 01:08:52 +010051#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070052int pci_remove_device_safe(struct pci_dev *dev)
53{
54 if (pci_dev_driver(dev))
55 return -EBUSY;
56 pci_destroy_dev(dev);
57 return 0;
58}
Adrian Bunk54c762f2005-12-22 01:08:52 +010059#endif /* 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61void pci_remove_bus(struct pci_bus *pci_bus)
62{
63 pci_proc_detach_bus(pci_bus);
64
Zhang Yanmind71374d2006-06-02 12:35:43 +080065 down_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 list_del(&pci_bus->node);
Zhang Yanmind71374d2006-06-02 12:35:43 +080067 up_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 pci_remove_legacy_files(pci_bus);
69 class_device_remove_file(&pci_bus->class_dev,
70 &class_device_attr_cpuaffinity);
71 sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge");
72 class_device_unregister(&pci_bus->class_dev);
73}
74EXPORT_SYMBOL(pci_remove_bus);
75
76/**
77 * pci_remove_bus_device - remove a PCI device and any children
78 * @dev: the device to remove
79 *
80 * Remove a PCI device from the device lists, informing the drivers
81 * that the device has been removed. We also remove any subordinate
82 * buses and children in a depth-first manner.
83 *
84 * For each device we remove, delete the device structure from the
85 * device lists, remove the /proc entry, and notify userspace
86 * (/sbin/hotplug).
87 */
88void pci_remove_bus_device(struct pci_dev *dev)
89{
90 if (dev->subordinate) {
91 struct pci_bus *b = dev->subordinate;
92
93 pci_remove_behind_bridge(dev);
94 pci_remove_bus(b);
95 dev->subordinate = NULL;
96 }
97
98 pci_destroy_dev(dev);
99}
100
101/**
102 * pci_remove_behind_bridge - remove all devices behind a PCI bridge
103 * @dev: PCI bridge device
104 *
105 * Remove all devices on the bus, except for the parent bridge.
106 * This also removes any child buses, and any devices they may
107 * contain in a depth-first manner.
108 */
109void pci_remove_behind_bridge(struct pci_dev *dev)
110{
111 struct list_head *l, *n;
112
113 if (dev->subordinate) {
114 list_for_each_safe(l, n, &dev->subordinate->devices) {
115 struct pci_dev *dev = pci_dev_b(l);
116
117 pci_remove_bus_device(dev);
118 }
119 }
120}
121
122EXPORT_SYMBOL(pci_remove_bus_device);
123EXPORT_SYMBOL(pci_remove_behind_bridge);