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1da177e4 LT |
1 | #include <linux/pci.h> |
2 | #include <linux/module.h> | |
6c723d5b | 3 | #include <linux/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 | { |
24f8aa9b ST |
22 | if (!dev->global_list.next) |
23 | return; | |
24 | ||
091ca9f0 RS |
25 | if (!list_empty(&dev->global_list)) { |
26 | pci_proc_detach_device(dev); | |
27 | pci_remove_sysfs_dev_files(dev); | |
28 | device_unregister(&dev->dev); | |
d71374da | 29 | down_write(&pci_bus_sem); |
091ca9f0 RS |
30 | list_del(&dev->global_list); |
31 | dev->global_list.next = dev->global_list.prev = NULL; | |
d71374da | 32 | up_write(&pci_bus_sem); |
091ca9f0 | 33 | } |
6c723d5b SL |
34 | |
35 | if (dev->bus->self) | |
36 | pcie_aspm_exit_link_state(dev); | |
24f8aa9b ST |
37 | } |
38 | ||
39 | static void pci_destroy_dev(struct pci_dev *dev) | |
40 | { | |
41 | pci_stop_dev(dev); | |
1da177e4 LT |
42 | |
43 | /* Remove the device from the device lists, and prevent any further | |
44 | * list accesses from this device */ | |
d71374da | 45 | down_write(&pci_bus_sem); |
1da177e4 | 46 | list_del(&dev->bus_list); |
1da177e4 | 47 | dev->bus_list.next = dev->bus_list.prev = NULL; |
d71374da | 48 | up_write(&pci_bus_sem); |
1da177e4 LT |
49 | |
50 | pci_free_resources(dev); | |
51 | pci_dev_put(dev); | |
52 | } | |
53 | ||
54 | /** | |
55 | * pci_remove_device_safe - remove an unused hotplug device | |
56 | * @dev: the device to remove | |
57 | * | |
58 | * Delete the device structure from the device lists and | |
59 | * notify userspace (/sbin/hotplug), but only if the device | |
60 | * in question is not being used by a driver. | |
61 | * Returns 0 on success. | |
62 | */ | |
54c762fe | 63 | #if 0 |
1da177e4 LT |
64 | int pci_remove_device_safe(struct pci_dev *dev) |
65 | { | |
66 | if (pci_dev_driver(dev)) | |
67 | return -EBUSY; | |
68 | pci_destroy_dev(dev); | |
69 | return 0; | |
70 | } | |
54c762fe | 71 | #endif /* 0 */ |
1da177e4 LT |
72 | |
73 | void pci_remove_bus(struct pci_bus *pci_bus) | |
74 | { | |
75 | pci_proc_detach_bus(pci_bus); | |
76 | ||
d71374da | 77 | down_write(&pci_bus_sem); |
1da177e4 | 78 | list_del(&pci_bus->node); |
d71374da | 79 | up_write(&pci_bus_sem); |
1da177e4 LT |
80 | pci_remove_legacy_files(pci_bus); |
81 | class_device_remove_file(&pci_bus->class_dev, | |
82 | &class_device_attr_cpuaffinity); | |
83 | sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge"); | |
84 | class_device_unregister(&pci_bus->class_dev); | |
85 | } | |
86 | EXPORT_SYMBOL(pci_remove_bus); | |
87 | ||
88 | /** | |
89 | * pci_remove_bus_device - remove a PCI device and any children | |
90 | * @dev: the device to remove | |
91 | * | |
92 | * Remove a PCI device from the device lists, informing the drivers | |
93 | * that the device has been removed. We also remove any subordinate | |
94 | * buses and children in a depth-first manner. | |
95 | * | |
96 | * For each device we remove, delete the device structure from the | |
97 | * device lists, remove the /proc entry, and notify userspace | |
98 | * (/sbin/hotplug). | |
99 | */ | |
100 | void pci_remove_bus_device(struct pci_dev *dev) | |
101 | { | |
102 | if (dev->subordinate) { | |
103 | struct pci_bus *b = dev->subordinate; | |
104 | ||
105 | pci_remove_behind_bridge(dev); | |
106 | pci_remove_bus(b); | |
107 | dev->subordinate = NULL; | |
108 | } | |
109 | ||
110 | pci_destroy_dev(dev); | |
111 | } | |
112 | ||
113 | /** | |
114 | * pci_remove_behind_bridge - remove all devices behind a PCI bridge | |
115 | * @dev: PCI bridge device | |
116 | * | |
117 | * Remove all devices on the bus, except for the parent bridge. | |
118 | * This also removes any child buses, and any devices they may | |
119 | * contain in a depth-first manner. | |
120 | */ | |
121 | void pci_remove_behind_bridge(struct pci_dev *dev) | |
122 | { | |
123 | struct list_head *l, *n; | |
124 | ||
125 | if (dev->subordinate) { | |
126 | list_for_each_safe(l, n, &dev->subordinate->devices) { | |
127 | struct pci_dev *dev = pci_dev_b(l); | |
128 | ||
129 | pci_remove_bus_device(dev); | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
24f8aa9b ST |
134 | static void pci_stop_bus_devices(struct pci_bus *bus) |
135 | { | |
136 | struct list_head *l, *n; | |
137 | ||
138 | list_for_each_safe(l, n, &bus->devices) { | |
139 | struct pci_dev *dev = pci_dev_b(l); | |
140 | pci_stop_bus_device(dev); | |
141 | } | |
142 | } | |
143 | ||
144 | /** | |
145 | * pci_stop_bus_device - stop a PCI device and any children | |
146 | * @dev: the device to stop | |
147 | * | |
148 | * Stop a PCI device (detach the driver, remove from the global list | |
149 | * and so on). This also stop any subordinate buses and children in a | |
150 | * depth-first manner. | |
151 | */ | |
152 | void pci_stop_bus_device(struct pci_dev *dev) | |
153 | { | |
154 | if (dev->subordinate) | |
155 | pci_stop_bus_devices(dev->subordinate); | |
156 | ||
157 | pci_stop_dev(dev); | |
158 | } | |
159 | ||
1da177e4 LT |
160 | EXPORT_SYMBOL(pci_remove_bus_device); |
161 | EXPORT_SYMBOL(pci_remove_behind_bridge); | |
24f8aa9b | 162 | EXPORT_SYMBOL_GPL(pci_stop_bus_device); |