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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 | { |
249bfb83 RW |
22 | pci_pme_active(dev, false); |
23 | ||
8a1bc901 | 24 | if (dev->is_added) { |
091ca9f0 RS |
25 | pci_proc_detach_device(dev); |
26 | pci_remove_sysfs_dev_files(dev); | |
27 | device_unregister(&dev->dev); | |
8a1bc901 | 28 | dev->is_added = 0; |
091ca9f0 | 29 | } |
7d715a6c SL |
30 | |
31 | if (dev->bus->self) | |
32 | pcie_aspm_exit_link_state(dev); | |
24f8aa9b ST |
33 | } |
34 | ||
35 | static void pci_destroy_dev(struct pci_dev *dev) | |
36 | { | |
d71374da | 37 | down_write(&pci_bus_sem); |
1da177e4 | 38 | list_del(&dev->bus_list); |
d71374da | 39 | up_write(&pci_bus_sem); |
1da177e4 LT |
40 | |
41 | pci_free_resources(dev); | |
42 | pci_dev_put(dev); | |
43 | } | |
44 | ||
d563e2cc | 45 | void pci_remove_bus(struct pci_bus *bus) |
1da177e4 | 46 | { |
d563e2cc | 47 | pci_proc_detach_bus(bus); |
1da177e4 | 48 | |
d71374da | 49 | down_write(&pci_bus_sem); |
d563e2cc BH |
50 | list_del(&bus->node); |
51 | pci_bus_release_busn_res(bus); | |
d71374da | 52 | up_write(&pci_bus_sem); |
d563e2cc | 53 | if (!bus->is_added) |
2b563134 YZ |
54 | return; |
55 | ||
d563e2cc BH |
56 | pci_remove_legacy_files(bus); |
57 | device_unregister(&bus->dev); | |
1da177e4 LT |
58 | } |
59 | EXPORT_SYMBOL(pci_remove_bus); | |
60 | ||
3891b6ac | 61 | static void pci_stop_bus_device(struct pci_dev *dev) |
24f8aa9b | 62 | { |
2ed168ee BH |
63 | struct pci_bus *bus = dev->subordinate; |
64 | struct pci_dev *child, *tmp; | |
65 | ||
66 | /* | |
3891b6ac | 67 | * Stopping an SR-IOV PF device removes all the associated VFs, |
2ed168ee BH |
68 | * which will update the bus->devices list and confuse the |
69 | * iterator. Therefore, iterate in reverse so we remove the VFs | |
70 | * first, then the PF. | |
71 | */ | |
282e1d65 | 72 | if (bus) { |
2ed168ee BH |
73 | list_for_each_entry_safe_reverse(child, tmp, |
74 | &bus->devices, bus_list) | |
3891b6ac YL |
75 | pci_stop_bus_device(child); |
76 | } | |
77 | ||
78 | pci_stop_dev(dev); | |
79 | } | |
80 | ||
81 | static void pci_remove_bus_device(struct pci_dev *dev) | |
82 | { | |
83 | struct pci_bus *bus = dev->subordinate; | |
84 | struct pci_dev *child, *tmp; | |
85 | ||
86 | if (bus) { | |
87 | list_for_each_entry_safe(child, tmp, | |
88 | &bus->devices, bus_list) | |
89 | pci_remove_bus_device(child); | |
282e1d65 BH |
90 | |
91 | pci_remove_bus(bus); | |
92 | dev->subordinate = NULL; | |
93 | } | |
24f8aa9b | 94 | |
282e1d65 | 95 | pci_destroy_dev(dev); |
24f8aa9b | 96 | } |
3891b6ac YL |
97 | |
98 | /** | |
99 | * pci_stop_and_remove_bus_device - remove a PCI device and any children | |
100 | * @dev: the device to remove | |
101 | * | |
102 | * Remove a PCI device from the device lists, informing the drivers | |
103 | * that the device has been removed. We also remove any subordinate | |
104 | * buses and children in a depth-first manner. | |
105 | * | |
106 | * For each device we remove, delete the device structure from the | |
107 | * device lists, remove the /proc entry, and notify userspace | |
108 | * (/sbin/hotplug). | |
109 | */ | |
110 | void pci_stop_and_remove_bus_device(struct pci_dev *dev) | |
111 | { | |
112 | pci_stop_bus_device(dev); | |
113 | pci_remove_bus_device(dev); | |
114 | } | |
210647af | 115 | EXPORT_SYMBOL(pci_stop_and_remove_bus_device); |
cdfcc572 YL |
116 | |
117 | void pci_stop_root_bus(struct pci_bus *bus) | |
118 | { | |
119 | struct pci_dev *child, *tmp; | |
120 | struct pci_host_bridge *host_bridge; | |
121 | ||
122 | if (!pci_is_root_bus(bus)) | |
123 | return; | |
124 | ||
125 | host_bridge = to_pci_host_bridge(bus->bridge); | |
126 | list_for_each_entry_safe_reverse(child, tmp, | |
127 | &bus->devices, bus_list) | |
128 | pci_stop_bus_device(child); | |
129 | ||
130 | /* stop the host bridge */ | |
131 | device_del(&host_bridge->dev); | |
132 | } | |
133 | ||
134 | void pci_remove_root_bus(struct pci_bus *bus) | |
135 | { | |
136 | struct pci_dev *child, *tmp; | |
137 | struct pci_host_bridge *host_bridge; | |
138 | ||
139 | if (!pci_is_root_bus(bus)) | |
140 | return; | |
141 | ||
142 | host_bridge = to_pci_host_bridge(bus->bridge); | |
143 | list_for_each_entry_safe(child, tmp, | |
144 | &bus->devices, bus_list) | |
145 | pci_remove_bus_device(child); | |
146 | pci_remove_bus(bus); | |
147 | host_bridge->bus = NULL; | |
148 | ||
149 | /* remove the host bridge */ | |
150 | put_device(&host_bridge->dev); | |
151 | } |