Commit | Line | Data |
---|---|---|
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); |
f6dd68a7 | 71 | pci_bus_release_busn_res(pci_bus); |
d71374da | 72 | up_write(&pci_bus_sem); |
2b563134 YZ |
73 | if (!pci_bus->is_added) |
74 | return; | |
75 | ||
1da177e4 | 76 | pci_remove_legacy_files(pci_bus); |
fd7d1ced | 77 | device_unregister(&pci_bus->dev); |
1da177e4 LT |
78 | } |
79 | EXPORT_SYMBOL(pci_remove_bus); | |
80 | ||
657c2077 BH |
81 | static void pci_stop_bus_device(struct pci_dev *dev); |
82 | ||
1da177e4 | 83 | /** |
210647af | 84 | * pci_stop_and_remove_bus_device - remove a PCI device and any children |
1da177e4 LT |
85 | * @dev: the device to remove |
86 | * | |
87 | * Remove a PCI device from the device lists, informing the drivers | |
88 | * that the device has been removed. We also remove any subordinate | |
89 | * buses and children in a depth-first manner. | |
90 | * | |
91 | * For each device we remove, delete the device structure from the | |
92 | * device lists, remove the /proc entry, and notify userspace | |
93 | * (/sbin/hotplug). | |
94 | */ | |
657c2077 | 95 | static void __pci_remove_bus_device(struct pci_dev *dev) |
1da177e4 | 96 | { |
2ed168ee BH |
97 | struct pci_bus *bus = dev->subordinate; |
98 | struct pci_dev *child, *tmp; | |
99 | ||
100 | if (bus) { | |
101 | list_for_each_entry_safe(child, tmp, &bus->devices, bus_list) | |
102 | __pci_remove_bus_device(child); | |
1da177e4 | 103 | |
2ed168ee | 104 | pci_remove_bus(bus); |
1da177e4 LT |
105 | dev->subordinate = NULL; |
106 | } | |
107 | ||
108 | pci_destroy_dev(dev); | |
109 | } | |
6b22cf3f | 110 | |
210647af | 111 | void pci_stop_and_remove_bus_device(struct pci_dev *dev) |
79cc9601 YL |
112 | { |
113 | pci_stop_bus_device(dev); | |
114 | __pci_remove_bus_device(dev); | |
115 | } | |
1da177e4 | 116 | |
24f8aa9b ST |
117 | /** |
118 | * pci_stop_bus_device - stop a PCI device and any children | |
119 | * @dev: the device to stop | |
120 | * | |
121 | * Stop a PCI device (detach the driver, remove from the global list | |
122 | * and so on). This also stop any subordinate buses and children in a | |
123 | * depth-first manner. | |
124 | */ | |
657c2077 | 125 | static void pci_stop_bus_device(struct pci_dev *dev) |
24f8aa9b | 126 | { |
2ed168ee BH |
127 | struct pci_bus *bus = dev->subordinate; |
128 | struct pci_dev *child, *tmp; | |
129 | ||
130 | /* | |
131 | * Removing an SR-IOV PF device removes all the associated VFs, | |
132 | * which will update the bus->devices list and confuse the | |
133 | * iterator. Therefore, iterate in reverse so we remove the VFs | |
134 | * first, then the PF. | |
135 | */ | |
136 | if (bus) | |
137 | list_for_each_entry_safe_reverse(child, tmp, | |
138 | &bus->devices, bus_list) | |
139 | pci_stop_bus_device(child); | |
24f8aa9b ST |
140 | |
141 | pci_stop_dev(dev); | |
142 | } | |
143 | ||
210647af | 144 | EXPORT_SYMBOL(pci_stop_and_remove_bus_device); |