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 {
44 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
45
46 return sprintf(buf, "%s\n", wiphy_name(wiphy));
47 }
48 static DEVICE_ATTR_RO(name);
49
addresses_show(struct device * dev,struct device_attribute * attr,char * buf)50 static ssize_t addresses_show(struct device *dev,
51 struct device_attribute *attr,
52 char *buf)
53 {
54 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
55 char *start = buf;
56 int i;
57
58 if (!wiphy->addresses)
59 return sprintf(buf, "%pM\n", wiphy->perm_addr);
60
61 for (i = 0; i < wiphy->n_addresses; i++)
62 buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
63
64 return buf - start;
65 }
66 static DEVICE_ATTR_RO(addresses);
67
68 static struct attribute *ieee80211_attrs[] = {
69 &dev_attr_index.attr,
70 &dev_attr_macaddress.attr,
71 &dev_attr_address_mask.attr,
72 &dev_attr_addresses.attr,
73 &dev_attr_name.attr,
74 NULL,
75 };
76 ATTRIBUTE_GROUPS(ieee80211);
77
wiphy_dev_release(struct device * dev)78 static void wiphy_dev_release(struct device *dev)
79 {
80 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
81
82 cfg80211_dev_free(rdev);
83 }
84
wiphy_uevent(struct device * dev,struct kobj_uevent_env * env)85 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
86 {
87 /* TODO, we probably need stuff here */
88 return 0;
89 }
90
91 #ifdef CONFIG_PM_SLEEP
cfg80211_leave_all(struct cfg80211_registered_device * rdev)92 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
93 {
94 struct wireless_dev *wdev;
95
96 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
97 cfg80211_leave(rdev, wdev);
98 }
99
wiphy_suspend(struct device * dev)100 static int wiphy_suspend(struct device *dev)
101 {
102 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
103 int ret = 0;
104
105 rdev->suspend_at = ktime_get_boottime_seconds();
106
107 rtnl_lock();
108 if (rdev->wiphy.registered) {
109 if (!rdev->wiphy.wowlan_config) {
110 cfg80211_leave_all(rdev);
111 cfg80211_process_rdev_events(rdev);
112 }
113 if (rdev->ops->suspend)
114 ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
115 if (ret == 1) {
116 /* Driver refuse to configure wowlan */
117 cfg80211_leave_all(rdev);
118 cfg80211_process_rdev_events(rdev);
119 ret = rdev_suspend(rdev, NULL);
120 }
121 }
122 rtnl_unlock();
123
124 return ret;
125 }
126
wiphy_resume(struct device * dev)127 static int wiphy_resume(struct device *dev)
128 {
129 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
130 int ret = 0;
131
132 /* Age scan results with time spent in suspend */
133 cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at);
134
135 rtnl_lock();
136 if (rdev->wiphy.registered && rdev->ops->resume)
137 ret = rdev_resume(rdev);
138 rtnl_unlock();
139
140 return ret;
141 }
142
143 static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
144 #define WIPHY_PM_OPS (&wiphy_pm_ops)
145 #else
146 #define WIPHY_PM_OPS NULL
147 #endif
148
wiphy_namespace(struct device * d)149 static const void *wiphy_namespace(struct device *d)
150 {
151 struct wiphy *wiphy = container_of(d, struct wiphy, dev);
152
153 return wiphy_net(wiphy);
154 }
155
156 struct class ieee80211_class = {
157 .name = "ieee80211",
158 .owner = THIS_MODULE,
159 .dev_release = wiphy_dev_release,
160 .dev_groups = ieee80211_groups,
161 .dev_uevent = wiphy_uevent,
162 .pm = WIPHY_PM_OPS,
163 .ns_type = &net_ns_type_operations,
164 .namespace = wiphy_namespace,
165 };
166
wiphy_sysfs_init(void)167 int wiphy_sysfs_init(void)
168 {
169 return class_register(&ieee80211_class);
170 }
171
wiphy_sysfs_exit(void)172 void wiphy_sysfs_exit(void)
173 {
174 class_unregister(&ieee80211_class);
175 }
176
