blob: 430281b2e9212400af4b8bf3dd9aa1fa72c41855 [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{
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -070021 if (!dev->global_list.next)
22 return;
23
Rajesh Shah091ca9f2005-04-28 00:25:49 -070024 if (!list_empty(&dev->global_list)) {
25 pci_proc_detach_device(dev);
26 pci_remove_sysfs_dev_files(dev);
27 device_unregister(&dev->dev);
Zhang Yanmind71374d2006-06-02 12:35:43 +080028 down_write(&pci_bus_sem);
Rajesh Shah091ca9f2005-04-28 00:25:49 -070029 list_del(&dev->global_list);
30 dev->global_list.next = dev->global_list.prev = NULL;
Zhang Yanmind71374d2006-06-02 12:35:43 +080031 up_write(&pci_bus_sem);
Rajesh Shah091ca9f2005-04-28 00:25:49 -070032 }
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -070033}
34
35static void pci_destroy_dev(struct pci_dev *dev)
36{
37 pci_stop_dev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39 /* Remove the device from the device lists, and prevent any further
40 * list accesses from this device */
Zhang Yanmind71374d2006-06-02 12:35:43 +080041 down_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 list_del(&dev->bus_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 dev->bus_list.next = dev->bus_list.prev = NULL;
Zhang Yanmind71374d2006-06-02 12:35:43 +080044 up_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46 pci_free_resources(dev);
47 pci_dev_put(dev);
48}
49
50/**
51 * pci_remove_device_safe - remove an unused hotplug device
52 * @dev: the device to remove
53 *
54 * Delete the device structure from the device lists and
55 * notify userspace (/sbin/hotplug), but only if the device
56 * in question is not being used by a driver.
57 * Returns 0 on success.
58 */
Adrian Bunk54c762f2005-12-22 01:08:52 +010059#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070060int pci_remove_device_safe(struct pci_dev *dev)
61{
62 if (pci_dev_driver(dev))
63 return -EBUSY;
64 pci_destroy_dev(dev);
65 return 0;
66}
Adrian Bunk54c762f2005-12-22 01:08:52 +010067#endif /* 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69void pci_remove_bus(struct pci_bus *pci_bus)
70{
71 pci_proc_detach_bus(pci_bus);
72
Zhang Yanmind71374d2006-06-02 12:35:43 +080073 down_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 list_del(&pci_bus->node);
Zhang Yanmind71374d2006-06-02 12:35:43 +080075 up_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 pci_remove_legacy_files(pci_bus);
77 class_device_remove_file(&pci_bus->class_dev,
78 &class_device_attr_cpuaffinity);
79 sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge");
80 class_device_unregister(&pci_bus->class_dev);
81}
82EXPORT_SYMBOL(pci_remove_bus);
83
84/**
85 * pci_remove_bus_device - remove a PCI device and any children
86 * @dev: the device to remove
87 *
88 * Remove a PCI device from the device lists, informing the drivers
89 * that the device has been removed. We also remove any subordinate
90 * buses and children in a depth-first manner.
91 *
92 * For each device we remove, delete the device structure from the
93 * device lists, remove the /proc entry, and notify userspace
94 * (/sbin/hotplug).
95 */
96void pci_remove_bus_device(struct pci_dev *dev)
97{
98 if (dev->subordinate) {
99 struct pci_bus *b = dev->subordinate;
100
101 pci_remove_behind_bridge(dev);
102 pci_remove_bus(b);
103 dev->subordinate = NULL;
104 }
105
106 pci_destroy_dev(dev);
107}
108
109/**
110 * pci_remove_behind_bridge - remove all devices behind a PCI bridge
111 * @dev: PCI bridge device
112 *
113 * Remove all devices on the bus, except for the parent bridge.
114 * This also removes any child buses, and any devices they may
115 * contain in a depth-first manner.
116 */
117void pci_remove_behind_bridge(struct pci_dev *dev)
118{
119 struct list_head *l, *n;
120
121 if (dev->subordinate) {
122 list_for_each_safe(l, n, &dev->subordinate->devices) {
123 struct pci_dev *dev = pci_dev_b(l);
124
125 pci_remove_bus_device(dev);
126 }
127 }
128}
129
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700130static void pci_stop_bus_devices(struct pci_bus *bus)
131{
132 struct list_head *l, *n;
133
134 list_for_each_safe(l, n, &bus->devices) {
135 struct pci_dev *dev = pci_dev_b(l);
136 pci_stop_bus_device(dev);
137 }
138}
139
140/**
141 * pci_stop_bus_device - stop a PCI device and any children
142 * @dev: the device to stop
143 *
144 * Stop a PCI device (detach the driver, remove from the global list
145 * and so on). This also stop any subordinate buses and children in a
146 * depth-first manner.
147 */
148void pci_stop_bus_device(struct pci_dev *dev)
149{
150 if (dev->subordinate)
151 pci_stop_bus_devices(dev->subordinate);
152
153 pci_stop_dev(dev);
154}
155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156EXPORT_SYMBOL(pci_remove_bus_device);
157EXPORT_SYMBOL(pci_remove_behind_bridge);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700158EXPORT_SYMBOL_GPL(pci_stop_bus_device);