blob: 8fc54b7327bc02b59af4a6455bcf43bdaf597252 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/pci.h>
2#include <linux/module.h>
Shaohua Li7d715a62008-02-25 09:46:41 +08003#include <linux/pci-aspm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include "pci.h"
5
6static void pci_free_resources(struct pci_dev *dev)
7{
8 int i;
9
10 msi_remove_pci_irq_vectors(dev);
11
12 pci_cleanup_rom(dev);
13 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
14 struct resource *res = dev->resource + i;
15 if (res->parent)
16 release_resource(res);
17 }
18}
19
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -070020static void pci_stop_dev(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070021{
Rafael J. Wysocki249bfb82013-02-11 20:49:49 +010022 pci_pme_active(dev, false);
23
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -080024 if (dev->is_added) {
Rajesh Shah091ca9f2005-04-28 00:25:49 -070025 pci_proc_detach_device(dev);
26 pci_remove_sysfs_dev_files(dev);
Jiang Liue723f0b2013-01-21 13:20:46 -080027 device_del(&dev->dev);
Greg Kroah-Hartman8a1bc902008-02-14 14:56:56 -080028 dev->is_added = 0;
Rajesh Shah091ca9f2005-04-28 00:25:49 -070029 }
Shaohua Li7d715a62008-02-25 09:46:41 +080030
31 if (dev->bus->self)
32 pcie_aspm_exit_link_state(dev);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -070033}
34
35static void pci_destroy_dev(struct pci_dev *dev)
36{
Zhang Yanmind71374d2006-06-02 12:35:43 +080037 down_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 list_del(&dev->bus_list);
Zhang Yanmind71374d2006-06-02 12:35:43 +080039 up_write(&pci_bus_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41 pci_free_resources(dev);
Jiang Liue723f0b2013-01-21 13:20:46 -080042 put_device(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043}
44
Bjorn Helgaasd563e2c2012-08-16 20:43:11 -060045void pci_remove_bus(struct pci_bus *bus)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
Bjorn Helgaasd563e2c2012-08-16 20:43:11 -060047 pci_proc_detach_bus(bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Zhang Yanmind71374d2006-06-02 12:35:43 +080049 down_write(&pci_bus_sem);
Bjorn Helgaasd563e2c2012-08-16 20:43:11 -060050 list_del(&bus->node);
51 pci_bus_release_busn_res(bus);
Zhang Yanmind71374d2006-06-02 12:35:43 +080052 up_write(&pci_bus_sem);
Bjorn Helgaasd563e2c2012-08-16 20:43:11 -060053 pci_remove_legacy_files(bus);
Jiang Liu10a95742013-04-12 05:44:20 +000054 pcibios_remove_bus(bus);
Bjorn Helgaasd563e2c2012-08-16 20:43:11 -060055 device_unregister(&bus->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056}
57EXPORT_SYMBOL(pci_remove_bus);
58
Yinghai Lu3891b6a2012-09-19 11:54:20 -070059static void pci_stop_bus_device(struct pci_dev *dev)
60{
61 struct pci_bus *bus = dev->subordinate;
62 struct pci_dev *child, *tmp;
63
64 /*
65 * Stopping an SR-IOV PF device removes all the associated VFs,
66 * which will update the bus->devices list and confuse the
67 * iterator. Therefore, iterate in reverse so we remove the VFs
68 * first, then the PF.
69 */
70 if (bus) {
71 list_for_each_entry_safe_reverse(child, tmp,
72 &bus->devices, bus_list)
73 pci_stop_bus_device(child);
74 }
75
76 pci_stop_dev(dev);
77}
78
79static void pci_remove_bus_device(struct pci_dev *dev)
80{
81 struct pci_bus *bus = dev->subordinate;
82 struct pci_dev *child, *tmp;
83
84 if (bus) {
85 list_for_each_entry_safe(child, tmp,
86 &bus->devices, bus_list)
87 pci_remove_bus_device(child);
88
89 pci_remove_bus(bus);
90 dev->subordinate = NULL;
91 }
92
93 pci_destroy_dev(dev);
94}
95
Linus Torvalds1da177e2005-04-16 15:20:36 -070096/**
Yinghai Lu210647a2012-02-25 13:54:20 -080097 * pci_stop_and_remove_bus_device - remove a PCI device and any children
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 * @dev: the device to remove
99 *
100 * Remove a PCI device from the device lists, informing the drivers
101 * that the device has been removed. We also remove any subordinate
102 * buses and children in a depth-first manner.
103 *
104 * For each device we remove, delete the device structure from the
105 * device lists, remove the /proc entry, and notify userspace
106 * (/sbin/hotplug).
107 */
Yinghai Lu210647a2012-02-25 13:54:20 -0800108void pci_stop_and_remove_bus_device(struct pci_dev *dev)
Yinghai Lu79cc9602011-11-22 21:06:53 -0800109{
Yinghai Lu3891b6a2012-09-19 11:54:20 -0700110 pci_stop_bus_device(dev);
111 pci_remove_bus_device(dev);
Satoru Takeuchi24f8aa92006-09-12 10:16:36 -0700112}
Yinghai Lu210647a2012-02-25 13:54:20 -0800113EXPORT_SYMBOL(pci_stop_and_remove_bus_device);
Yinghai Lucdfcc572012-10-30 14:31:38 -0600114
115void pci_stop_root_bus(struct pci_bus *bus)
116{
117 struct pci_dev *child, *tmp;
118 struct pci_host_bridge *host_bridge;
119
120 if (!pci_is_root_bus(bus))
121 return;
122
123 host_bridge = to_pci_host_bridge(bus->bridge);
124 list_for_each_entry_safe_reverse(child, tmp,
125 &bus->devices, bus_list)
126 pci_stop_bus_device(child);
127
128 /* stop the host bridge */
129 device_del(&host_bridge->dev);
130}
131
132void pci_remove_root_bus(struct pci_bus *bus)
133{
134 struct pci_dev *child, *tmp;
135 struct pci_host_bridge *host_bridge;
136
137 if (!pci_is_root_bus(bus))
138 return;
139
140 host_bridge = to_pci_host_bridge(bus->bridge);
141 list_for_each_entry_safe(child, tmp,
142 &bus->devices, bus_list)
143 pci_remove_bus_device(child);
144 pci_remove_bus(bus);
145 host_bridge->bus = NULL;
146
147 /* remove the host bridge */
148 put_device(&host_bridge->dev);
149}