1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/pci-aspm.h>
#include "pci.h"
static void pci_free_resources(struct pci_dev *dev)
{
int i;
msi_remove_pci_irq_vectors(dev);
pci_cleanup_rom(dev);
for (i = 0; i < PCI_NUM_RESOURCES; i++) {
struct resource *res = dev->resource + i;
if (res->parent)
release_resource(res);
}
}
static void pci_stop_dev(struct pci_dev *dev)
{
if (dev->is_added) {
pci_proc_detach_device(dev);
pci_remove_sysfs_dev_files(dev);
device_unregister(&dev->dev);
dev->is_added = 0;
}
if (dev->bus->self)
pcie_aspm_exit_link_state(dev);
}
static void pci_destroy_dev(struct pci_dev *dev)
{
pci_stop_dev(dev);
/* Remove the device from the device lists, and prevent any further
* list accesses from this device */
down_write(&pci_bus_sem);
list_del(&dev->bus_list);
dev->bus_list.next = dev->bus_list.prev = NULL;
up_write(&pci_bus_sem);
pci_free_resources(dev);
pci_dev_put(dev);
}
/**
* pci_remove_device_safe - remove an unused hotplug device
* @dev: the device to remove
*
* Delete the device structure from the device lists and
* notify userspace (/sbin/hotplug), but only if the device
* in question is not being used by a driver.
* Returns 0 on success.
*/
#if 0
int pci_remove_device_safe(struct pci_dev *dev)
{
if (pci_dev_driver(dev))
return -EBUSY;
pci_destroy_dev(dev);
return 0;
}
#endif /* 0 */
void pci_remove_bus(struct pci_bus *pci_bus)
{
pci_proc_detach_bus(pci_bus);
down_write(&pci_bus_sem);
list_del(&pci_bus->node);
up_write(&pci_bus_sem);
pci_remove_legacy_files(pci_bus);
device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
device_remove_file(&pci_bus->dev, &dev_attr_cpulistaffinity);
device_unregister(&pci_bus->dev);
}
EXPORT_SYMBOL(pci_remove_bus);
/**
* pci_remove_bus_device - remove a PCI device and any children
* @dev: the device to remove
*
* Remove a PCI device from the device lists, informing the drivers
* that the device has been removed. We also remove any subordinate
* buses and children in a depth-first manner.
*
* For each device we remove, delete the device structure from the
* device lists, remove the /proc entry, and notify userspace
* (/sbin/hotplug).
*/
void pci_remove_bus_device(struct pci_dev *dev)
{
if (dev->subordinate) {
struct pci_bus *b = dev->subordinate;
pci_remove_behind_bridge(dev);
pci_remove_bus(b);
dev->subordinate = NULL;
}
pci_destroy_dev(dev);
}
/**
* pci_remove_behind_bridge - remove all devices behind a PCI bridge
* @dev: PCI bridge device
*
* Remove all devices on the bus, except for the parent bridge.
* This also removes any child buses, and any devices they may
* contain in a depth-first manner.
*/
void pci_remove_behind_bridge(struct pci_dev *dev)
{
struct list_head *l, *n;
if (dev->subordinate)
list_for_each_safe(l, n, &dev->subordinate->devices)
pci_remove_bus_device(pci_dev_b(l));
}
static void pci_stop_bus_devices(struct pci_bus *bus)
{
struct list_head *l, *n;
list_for_each_safe(l, n, &bus->devices) {
struct pci_dev *dev = pci_dev_b(l);
pci_stop_bus_device(dev);
}
}
/**
* pci_stop_bus_device - stop a PCI device and any children
* @dev: the device to stop
*
* Stop a PCI device (detach the driver, remove from the global list
* and so on). This also stop any subordinate buses and children in a
* depth-first manner.
*/
void pci_stop_bus_device(struct pci_dev *dev)
{
if (dev->subordinate)
pci_stop_bus_devices(dev->subordinate);
pci_stop_dev(dev);
}
EXPORT_SYMBOL(pci_remove_bus_device);
EXPORT_SYMBOL(pci_remove_behind_bridge);
EXPORT_SYMBOL_GPL(pci_stop_bus_device);
|
