blob: d3c77cbe327958f182b89b2b69e677df7d43cf45 [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
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -070019static void pci_stop_dev(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070020{
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -080021 if (dev->is_added) {
Rajesh Shah091ca9f2005-04-28 00:25:49 -070022 pci_proc_detach_device(dev);
23 pci_remove_sysfs_dev_files(dev);
24 device_unregister(&dev->dev);
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -080025 dev->is_added = 0;
Zhang Yanmind71374d2006-06-02 12:35:43 +080026 down_write(&pci_bus_sem);
Rajesh Shah091ca9f2005-04-28 00:25:49 -070027 list_del(&dev->global_list);
28 dev->global_list.next = dev->global_list.prev = NULL;
Zhang Yanmind71374d2006-06-02 12:35:43 +080029 up_write(&pci_bus_sem);
Rajesh Shah091ca9f2005-04-28 00:25:49 -070030 }
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -070031}
32
33static void pci_destroy_dev(struct pci_dev *dev)
34{
35 pci_stop_dev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37 /* Remove the device from the device lists, and prevent any further
38 * list accesses from this device */
Zhang Yanmind71374d2006-06-02 12:35:43 +080039 down_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 list_del(&dev->bus_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 dev->bus_list.next = dev->bus_list.prev = NULL;
Zhang Yanmind71374d2006-06-02 12:35:43 +080042 up_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44 pci_free_resources(dev);
45 pci_dev_put(dev);
46}
47
48/**
49 * pci_remove_device_safe - remove an unused hotplug device
50 * @dev: the device to remove
51 *
52 * Delete the device structure from the device lists and
53 * notify userspace (/sbin/hotplug), but only if the device
54 * in question is not being used by a driver.
55 * Returns 0 on success.
56 */
Adrian Bunk54c762f2005-12-22 01:08:52 +010057#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070058int pci_remove_device_safe(struct pci_dev *dev)
59{
60 if (pci_dev_driver(dev))
61 return -EBUSY;
62 pci_destroy_dev(dev);
63 return 0;
64}
Adrian Bunk54c762f2005-12-22 01:08:52 +010065#endif /* 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67void pci_remove_bus(struct pci_bus *pci_bus)
68{
69 pci_proc_detach_bus(pci_bus);
70
Zhang Yanmind71374d2006-06-02 12:35:43 +080071 down_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 list_del(&pci_bus->node);
Zhang Yanmind71374d2006-06-02 12:35:43 +080073 up_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 pci_remove_legacy_files(pci_bus);
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -040075 device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
76 device_unregister(&pci_bus->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
78EXPORT_SYMBOL(pci_remove_bus);
79
80/**
81 * pci_remove_bus_device - remove a PCI device and any children
82 * @dev: the device to remove
83 *
84 * Remove a PCI device from the device lists, informing the drivers
85 * that the device has been removed. We also remove any subordinate
86 * buses and children in a depth-first manner.
87 *
88 * For each device we remove, delete the device structure from the
89 * device lists, remove the /proc entry, and notify userspace
90 * (/sbin/hotplug).
91 */
92void pci_remove_bus_device(struct pci_dev *dev)
93{
94 if (dev->subordinate) {
95 struct pci_bus *b = dev->subordinate;
96
97 pci_remove_behind_bridge(dev);
98 pci_remove_bus(b);
99 dev->subordinate = NULL;
100 }
101
102 pci_destroy_dev(dev);
103}
104
105/**
106 * pci_remove_behind_bridge - remove all devices behind a PCI bridge
107 * @dev: PCI bridge device
108 *
109 * Remove all devices on the bus, except for the parent bridge.
110 * This also removes any child buses, and any devices they may
111 * contain in a depth-first manner.
112 */
113void pci_remove_behind_bridge(struct pci_dev *dev)
114{
115 struct list_head *l, *n;
116
117 if (dev->subordinate) {
118 list_for_each_safe(l, n, &dev->subordinate->devices) {
119 struct pci_dev *dev = pci_dev_b(l);
120
121 pci_remove_bus_device(dev);
122 }
123 }
124}
125
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700126static void pci_stop_bus_devices(struct pci_bus *bus)
127{
128 struct list_head *l, *n;
129
130 list_for_each_safe(l, n, &bus->devices) {
131 struct pci_dev *dev = pci_dev_b(l);
132 pci_stop_bus_device(dev);
133 }
134}
135
136/**
137 * pci_stop_bus_device - stop a PCI device and any children
138 * @dev: the device to stop
139 *
140 * Stop a PCI device (detach the driver, remove from the global list
141 * and so on). This also stop any subordinate buses and children in a
142 * depth-first manner.
143 */
144void pci_stop_bus_device(struct pci_dev *dev)
145{
146 if (dev->subordinate)
147 pci_stop_bus_devices(dev->subordinate);
148
149 pci_stop_dev(dev);
150}
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152EXPORT_SYMBOL(pci_remove_bus_device);
153EXPORT_SYMBOL(pci_remove_behind_bridge);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700154EXPORT_SYMBOL_GPL(pci_stop_bus_device);