1 /*
2 * This file provides /sys/class/ieee80211/<wiphy name>/
3 * and some default attributes.
4 *
5 * Copyright 2005-2006 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
7 *
8 * This file is GPLv2 as found in COPYING.
9 */
10
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/netdevice.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <net/cfg80211.h>
17 #include "sysfs.h"
18 #include "core.h"
19 #include "rdev-ops.h"
20
dev_to_rdev(struct device * dev)21 static inline struct cfg80211_registered_device *dev_to_rdev(
22 struct device *dev)
23 {
24 return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
25 }
26
27 #define SHOW_FMT(name, fmt, member) \
28 static ssize_t name ## _show(struct device *dev, \
29 struct device_attribute *attr, \
30 char *buf) \
31 { \
32 return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member); \
33 } \
34 static DEVICE_ATTR_RO(name)
35
36 SHOW_FMT(index, "%d", wiphy_idx);
37 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
38 SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
39
name_show(struct device * dev,struct device_attribute * attr,char * buf)40 static ssize_t name_show(struct device *dev,
41 struct device_attribute *attr,
42 char *buf) {
43 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
44 return sprintf(buf, "%s\n", dev_name(&wiphy->dev));
45 }
46 static DEVICE_ATTR_RO(name);
47
addresses_show(struct device * dev,struct device_attribute * attr,char * buf)48 static ssize_t addresses_show(struct device *dev,
49 struct device_attribute *attr,
50 char *buf)
51 {
52 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
53 char *start = buf;
54 int i;
55
56 if (!wiphy->addresses)
57 return sprintf(buf, "%pM\n", wiphy->perm_addr);
58
59 for (i = 0; i < wiphy->n_addresses; i++)
60 buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
61
62 return buf - start;
63 }
64 static DEVICE_ATTR_RO(addresses);
65
66 static struct attribute *ieee80211_attrs[] = {
67 &dev_attr_index.attr,
68 &dev_attr_macaddress.attr,
69 &dev_attr_address_mask.attr,
70 &dev_attr_addresses.attr,
71 &dev_attr_name.attr,
72 NULL,
73 };
74 ATTRIBUTE_GROUPS(ieee80211);
75
wiphy_dev_release(struct device * dev)76 static void wiphy_dev_release(struct device *dev)
77 {
78 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
79
80 cfg80211_dev_free(rdev);
81 }
82
wiphy_uevent(struct device * dev,struct kobj_uevent_env * env)83 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
84 {
85 /* TODO, we probably need stuff here */
86 return 0;
87 }
88
89 #ifdef CONFIG_PM_SLEEP
cfg80211_leave_all(struct cfg80211_registered_device * rdev)90 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
91 {
92 struct wireless_dev *wdev;
93
94 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
95 cfg80211_leave(rdev, wdev);
96 }
97
wiphy_suspend(struct device * dev)98 static int wiphy_suspend(struct device *dev)
99 {
100 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
101 int ret = 0;
102
103 rdev->suspend_at = get_seconds();
104
105 rtnl_lock();
106 if (rdev->wiphy.registered) {
107 if (!rdev->wiphy.wowlan_config) {
108 cfg80211_leave_all(rdev);
109 cfg80211_process_rdev_events(rdev);
110 }
111 if (rdev->ops->suspend)
112 ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
113 if (ret == 1) {
114 /* Driver refuse to configure wowlan */
115 cfg80211_leave_all(rdev);
116 cfg80211_process_rdev_events(rdev);
117 ret = rdev_suspend(rdev, NULL);
118 }
119 }
120 rtnl_unlock();
121
122 return ret;
123 }
124
wiphy_resume(struct device * dev)125 static int wiphy_resume(struct device *dev)
126 {
127 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
128 int ret = 0;
129
130 /* Age scan results with time spent in suspend */
131 cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
132
133 rtnl_lock();
134 if (rdev->wiphy.registered && rdev->ops->resume)
135 ret = rdev_resume(rdev);
136 rtnl_unlock();
137
138 return ret;
139 }
140
141 static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
142 #define WIPHY_PM_OPS (&wiphy_pm_ops)
143 #else
144 #define WIPHY_PM_OPS NULL
145 #endif
146
wiphy_namespace(struct device * d)147 static const void *wiphy_namespace(struct device *d)
148 {
149 struct wiphy *wiphy = container_of(d, struct wiphy, dev);
150
151 return wiphy_net(wiphy);
152 }
153
154 struct class ieee80211_class = {
155 .name = "ieee80211",
156 .owner = THIS_MODULE,
157 .dev_release = wiphy_dev_release,
158 .dev_groups = ieee80211_groups,
159 .dev_uevent = wiphy_uevent,
160 .pm = WIPHY_PM_OPS,
161 .ns_type = &net_ns_type_operations,
162 .namespace = wiphy_namespace,
163 };
164
wiphy_sysfs_init(void)165 int wiphy_sysfs_init(void)
166 {
167 return class_register(&ieee80211_class);
168 }
169
wiphy_sysfs_exit(void)170 void wiphy_sysfs_exit(void)
171 {
172 class_unregister(&ieee80211_class);
173 }
174