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 | { |
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); | |
e723f0b4 | 27 | device_del(&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); | |
e723f0b4 | 42 | put_device(&dev->dev); |
1da177e4 LT |
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 BH |
53 | pci_remove_legacy_files(bus); |
54 | device_unregister(&bus->dev); | |
1da177e4 LT |
55 | } |
56 | EXPORT_SYMBOL(pci_remove_bus); | |
57 | ||
3891b6ac | 58 | static void pci_stop_bus_device(struct pci_dev *dev) |
24f8aa9b | 59 | { |
2ed168ee BH |
60 | struct pci_bus *bus = dev->subordinate; |
61 | struct pci_dev *child, *tmp; | |
62 | ||
63 | /* | |
3891b6ac | 64 | * Stopping an SR-IOV PF device removes all the associated VFs, |
2ed168ee BH |
65 | * which will update the bus->devices list and confuse the |
66 | * iterator. Therefore, iterate in reverse so we remove the VFs | |
67 | * first, then the PF. | |
68 | */ | |
282e1d65 | 69 | if (bus) { |
2ed168ee BH |
70 | list_for_each_entry_safe_reverse(child, tmp, |
71 | &bus->devices, bus_list) | |
3891b6ac YL |
72 | pci_stop_bus_device(child); |
73 | } | |
74 | ||
75 | pci_stop_dev(dev); | |
76 | } | |
77 | ||
78 | static void pci_remove_bus_device(struct pci_dev *dev) | |
79 | { | |
80 | struct pci_bus *bus = dev->subordinate; | |
81 | struct pci_dev *child, *tmp; | |
82 | ||
83 | if (bus) { | |
84 | list_for_each_entry_safe(child, tmp, | |
85 | &bus->devices, bus_list) | |
86 | pci_remove_bus_device(child); | |
282e1d65 BH |
87 | |
88 | pci_remove_bus(bus); | |
89 | dev->subordinate = NULL; | |
90 | } | |
24f8aa9b | 91 | |
282e1d65 | 92 | pci_destroy_dev(dev); |
24f8aa9b | 93 | } |
3891b6ac YL |
94 | |
95 | /** | |
96 | * pci_stop_and_remove_bus_device - remove a PCI device and any children | |
97 | * @dev: the device to remove | |
98 | * | |
99 | * Remove a PCI device from the device lists, informing the drivers | |
100 | * that the device has been removed. We also remove any subordinate | |
101 | * buses and children in a depth-first manner. | |
102 | * | |
103 | * For each device we remove, delete the device structure from the | |
104 | * device lists, remove the /proc entry, and notify userspace | |
105 | * (/sbin/hotplug). | |
106 | */ | |
107 | void pci_stop_and_remove_bus_device(struct pci_dev *dev) | |
108 | { | |
109 | pci_stop_bus_device(dev); | |
110 | pci_remove_bus_device(dev); | |
111 | } | |
210647af | 112 | EXPORT_SYMBOL(pci_stop_and_remove_bus_device); |
cdfcc572 YL |
113 | |
114 | void pci_stop_root_bus(struct pci_bus *bus) | |
115 | { | |
116 | struct pci_dev *child, *tmp; | |
117 | struct pci_host_bridge *host_bridge; | |
118 | ||
119 | if (!pci_is_root_bus(bus)) | |
120 | return; | |
121 | ||
122 | host_bridge = to_pci_host_bridge(bus->bridge); | |
123 | list_for_each_entry_safe_reverse(child, tmp, | |
124 | &bus->devices, bus_list) | |
125 | pci_stop_bus_device(child); | |
126 | ||
127 | /* stop the host bridge */ | |
128 | device_del(&host_bridge->dev); | |
129 | } | |
130 | ||
131 | void pci_remove_root_bus(struct pci_bus *bus) | |
132 | { | |
133 | struct pci_dev *child, *tmp; | |
134 | struct pci_host_bridge *host_bridge; | |
135 | ||
136 | if (!pci_is_root_bus(bus)) | |
137 | return; | |
138 | ||
139 | host_bridge = to_pci_host_bridge(bus->bridge); | |
140 | list_for_each_entry_safe(child, tmp, | |
141 | &bus->devices, bus_list) | |
142 | pci_remove_bus_device(child); | |
143 | pci_remove_bus(bus); | |
144 | host_bridge->bus = NULL; | |
145 | ||
146 | /* remove the host bridge */ | |
147 | put_device(&host_bridge->dev); | |
148 | } |