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1da177e4 LT |
1 | #include <linux/pci.h> |
2 | #include <linux/module.h> | |
3 | #include "pci.h" | |
4 | ||
5 | static 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 | ||
24f8aa9b | 19 | static void pci_stop_dev(struct pci_dev *dev) |
1da177e4 | 20 | { |
24f8aa9b ST |
21 | if (!dev->global_list.next) |
22 | return; | |
23 | ||
091ca9f0 RS |
24 | if (!list_empty(&dev->global_list)) { |
25 | pci_proc_detach_device(dev); | |
26 | pci_remove_sysfs_dev_files(dev); | |
27 | device_unregister(&dev->dev); | |
d71374da | 28 | down_write(&pci_bus_sem); |
091ca9f0 RS |
29 | list_del(&dev->global_list); |
30 | dev->global_list.next = dev->global_list.prev = NULL; | |
d71374da | 31 | up_write(&pci_bus_sem); |
091ca9f0 | 32 | } |
24f8aa9b ST |
33 | } |
34 | ||
35 | static void pci_destroy_dev(struct pci_dev *dev) | |
36 | { | |
37 | pci_stop_dev(dev); | |
1da177e4 LT |
38 | |
39 | /* Remove the device from the device lists, and prevent any further | |
40 | * list accesses from this device */ | |
d71374da | 41 | down_write(&pci_bus_sem); |
1da177e4 | 42 | list_del(&dev->bus_list); |
1da177e4 | 43 | dev->bus_list.next = dev->bus_list.prev = NULL; |
d71374da | 44 | up_write(&pci_bus_sem); |
1da177e4 LT |
45 | |
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 | */ | |
54c762fe | 59 | #if 0 |
1da177e4 LT |
60 | int 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 | } | |
54c762fe | 67 | #endif /* 0 */ |
1da177e4 LT |
68 | |
69 | void pci_remove_bus(struct pci_bus *pci_bus) | |
70 | { | |
71 | pci_proc_detach_bus(pci_bus); | |
72 | ||
d71374da | 73 | down_write(&pci_bus_sem); |
1da177e4 | 74 | list_del(&pci_bus->node); |
d71374da | 75 | up_write(&pci_bus_sem); |
1da177e4 | 76 | pci_remove_legacy_files(pci_bus); |
fd7d1ced GKH |
77 | device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity); |
78 | device_unregister(&pci_bus->dev); | |
1da177e4 LT |
79 | } |
80 | EXPORT_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 | */ | |
94 | void 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 | */ | |
115 | void 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 | ||
24f8aa9b ST |
128 | static 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 | */ | |
146 | void 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 | ||
1da177e4 LT |
154 | EXPORT_SYMBOL(pci_remove_bus_device); |
155 | EXPORT_SYMBOL(pci_remove_behind_bridge); | |
24f8aa9b | 156 | EXPORT_SYMBOL_GPL(pci_stop_bus_device); |