Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/pci.h> |
2 | #include <linux/module.h> | |
7d715a6c | 3 | #include <linux/pci-aspm.h> |
1da177e4 LT |
4 | #include "pci.h" |
5 | ||
6 | static 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 | ||
24f8aa9b | 20 | static void pci_stop_dev(struct pci_dev *dev) |
1da177e4 | 21 | { |
8a1bc901 | 22 | if (dev->is_added) { |
091ca9f0 RS |
23 | pci_proc_detach_device(dev); |
24 | pci_remove_sysfs_dev_files(dev); | |
25 | device_unregister(&dev->dev); | |
8a1bc901 | 26 | dev->is_added = 0; |
091ca9f0 | 27 | } |
7d715a6c SL |
28 | |
29 | if (dev->bus->self) | |
30 | pcie_aspm_exit_link_state(dev); | |
24f8aa9b ST |
31 | } |
32 | ||
33 | static void pci_destroy_dev(struct pci_dev *dev) | |
34 | { | |
1da177e4 LT |
35 | /* Remove the device from the device lists, and prevent any further |
36 | * list accesses from this device */ | |
d71374da | 37 | down_write(&pci_bus_sem); |
1da177e4 | 38 | list_del(&dev->bus_list); |
1da177e4 | 39 | dev->bus_list.next = dev->bus_list.prev = NULL; |
d71374da | 40 | up_write(&pci_bus_sem); |
1da177e4 LT |
41 | |
42 | pci_free_resources(dev); | |
43 | pci_dev_put(dev); | |
44 | } | |
45 | ||
46 | /** | |
47 | * pci_remove_device_safe - remove an unused hotplug device | |
48 | * @dev: the device to remove | |
49 | * | |
50 | * Delete the device structure from the device lists and | |
51 | * notify userspace (/sbin/hotplug), but only if the device | |
52 | * in question is not being used by a driver. | |
53 | * Returns 0 on success. | |
54 | */ | |
54c762fe | 55 | #if 0 |
1da177e4 LT |
56 | int pci_remove_device_safe(struct pci_dev *dev) |
57 | { | |
58 | if (pci_dev_driver(dev)) | |
59 | return -EBUSY; | |
60 | pci_destroy_dev(dev); | |
61 | return 0; | |
62 | } | |
54c762fe | 63 | #endif /* 0 */ |
1da177e4 LT |
64 | |
65 | void pci_remove_bus(struct pci_bus *pci_bus) | |
66 | { | |
67 | pci_proc_detach_bus(pci_bus); | |
68 | ||
d71374da | 69 | down_write(&pci_bus_sem); |
1da177e4 | 70 | list_del(&pci_bus->node); |
d71374da | 71 | up_write(&pci_bus_sem); |
2b563134 YZ |
72 | if (!pci_bus->is_added) |
73 | return; | |
74 | ||
1da177e4 | 75 | pci_remove_legacy_files(pci_bus); |
fd7d1ced | 76 | device_unregister(&pci_bus->dev); |
1da177e4 LT |
77 | } |
78 | EXPORT_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 | */ | |
92 | void pci_remove_bus_device(struct pci_dev *dev) | |
93 | { | |
7ae0567f | 94 | pci_stop_bus_device(dev); |
1da177e4 LT |
95 | if (dev->subordinate) { |
96 | struct pci_bus *b = dev->subordinate; | |
97 | ||
98 | pci_remove_behind_bridge(dev); | |
99 | pci_remove_bus(b); | |
100 | dev->subordinate = NULL; | |
101 | } | |
102 | ||
103 | pci_destroy_dev(dev); | |
104 | } | |
105 | ||
106 | /** | |
107 | * pci_remove_behind_bridge - remove all devices behind a PCI bridge | |
108 | * @dev: PCI bridge device | |
109 | * | |
110 | * Remove all devices on the bus, except for the parent bridge. | |
111 | * This also removes any child buses, and any devices they may | |
112 | * contain in a depth-first manner. | |
113 | */ | |
114 | void pci_remove_behind_bridge(struct pci_dev *dev) | |
115 | { | |
116 | struct list_head *l, *n; | |
117 | ||
11d58742 SH |
118 | if (dev->subordinate) |
119 | list_for_each_safe(l, n, &dev->subordinate->devices) | |
120 | pci_remove_bus_device(pci_dev_b(l)); | |
1da177e4 LT |
121 | } |
122 | ||
24f8aa9b ST |
123 | static void pci_stop_bus_devices(struct pci_bus *bus) |
124 | { | |
125 | struct list_head *l, *n; | |
126 | ||
127 | list_for_each_safe(l, n, &bus->devices) { | |
128 | struct pci_dev *dev = pci_dev_b(l); | |
129 | pci_stop_bus_device(dev); | |
130 | } | |
131 | } | |
132 | ||
133 | /** | |
134 | * pci_stop_bus_device - stop a PCI device and any children | |
135 | * @dev: the device to stop | |
136 | * | |
137 | * Stop a PCI device (detach the driver, remove from the global list | |
138 | * and so on). This also stop any subordinate buses and children in a | |
139 | * depth-first manner. | |
140 | */ | |
141 | void pci_stop_bus_device(struct pci_dev *dev) | |
142 | { | |
143 | if (dev->subordinate) | |
144 | pci_stop_bus_devices(dev->subordinate); | |
145 | ||
146 | pci_stop_dev(dev); | |
147 | } | |
148 | ||
1da177e4 LT |
149 | EXPORT_SYMBOL(pci_remove_bus_device); |
150 | EXPORT_SYMBOL(pci_remove_behind_bridge); | |
24f8aa9b | 151 | EXPORT_SYMBOL_GPL(pci_stop_bus_device); |