blob: 9684e1bde277a1e012fae641363178f394071323 [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);
Greg Kroah-Hartmanfd7d1ce2007-05-22 22:47:54 -040077 device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
78 device_unregister(&pci_bus->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079}
80EXPORT_SYMBOL(pci_remove_bus);
81
82/**
83 * pci_remove_bus_device - remove a PCI device and any children
84 * @dev: the device to remove
85 *
86 * Remove a PCI device from the device lists, informing the drivers
87 * that the device has been removed. We also remove any subordinate
88 * buses and children in a depth-first manner.
89 *
90 * For each device we remove, delete the device structure from the
91 * device lists, remove the /proc entry, and notify userspace
92 * (/sbin/hotplug).
93 */
94void pci_remove_bus_device(struct pci_dev *dev)
95{
96 if (dev->subordinate) {
97 struct pci_bus *b = dev->subordinate;
98
99 pci_remove_behind_bridge(dev);
100 pci_remove_bus(b);
101 dev->subordinate = NULL;
102 }
103
104 pci_destroy_dev(dev);
105}
106
107/**
108 * pci_remove_behind_bridge - remove all devices behind a PCI bridge
109 * @dev: PCI bridge device
110 *
111 * Remove all devices on the bus, except for the parent bridge.
112 * This also removes any child buses, and any devices they may
113 * contain in a depth-first manner.
114 */
115void pci_remove_behind_bridge(struct pci_dev *dev)
116{
117 struct list_head *l, *n;
118
119 if (dev->subordinate) {
120 list_for_each_safe(l, n, &dev->subordinate->devices) {
121 struct pci_dev *dev = pci_dev_b(l);
122
123 pci_remove_bus_device(dev);
124 }
125 }
126}
127
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700128static void pci_stop_bus_devices(struct pci_bus *bus)
129{
130 struct list_head *l, *n;
131
132 list_for_each_safe(l, n, &bus->devices) {
133 struct pci_dev *dev = pci_dev_b(l);
134 pci_stop_bus_device(dev);
135 }
136}
137
138/**
139 * pci_stop_bus_device - stop a PCI device and any children
140 * @dev: the device to stop
141 *
142 * Stop a PCI device (detach the driver, remove from the global list
143 * and so on). This also stop any subordinate buses and children in a
144 * depth-first manner.
145 */
146void pci_stop_bus_device(struct pci_dev *dev)
147{
148 if (dev->subordinate)
149 pci_stop_bus_devices(dev->subordinate);
150
151 pci_stop_dev(dev);
152}
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154EXPORT_SYMBOL(pci_remove_bus_device);
155EXPORT_SYMBOL(pci_remove_behind_bridge);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700156EXPORT_SYMBOL_GPL(pci_stop_bus_device);