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
21static 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)					\
28static 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}									\
34static DEVICE_ATTR_RO(name)
35
36SHOW_FMT(index, "%d", wiphy_idx);
37SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
38SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
39
40static 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}
46static DEVICE_ATTR_RO(name);
47
48static 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}
64static DEVICE_ATTR_RO(addresses);
65
66static 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};
74ATTRIBUTE_GROUPS(ieee80211);
75
76static 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
83static 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
90static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
91{
92	struct wireless_dev *wdev;
93
94	list_for_each_entry(wdev, &rdev->wdev_list, list)
95		cfg80211_leave(rdev, wdev);
96}
97
98static int wiphy_suspend(struct device *dev, pm_message_t state)
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		if (rdev->ops->suspend)
110			ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
111		if (ret == 1) {
112			/* Driver refuse to configure wowlan */
113			cfg80211_leave_all(rdev);
114			ret = rdev_suspend(rdev, NULL);
115		}
116	}
117	rtnl_unlock();
118
119	return ret;
120}
121
122static int wiphy_resume(struct device *dev)
123{
124	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
125	int ret = 0;
126
127	/* Age scan results with time spent in suspend */
128	cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
129
130	if (rdev->ops->resume) {
131		rtnl_lock();
132		if (rdev->wiphy.registered)
133			ret = rdev_resume(rdev);
134		rtnl_unlock();
135	}
136
137	return ret;
138}
139#endif
140
141static const void *wiphy_namespace(struct device *d)
142{
143	struct wiphy *wiphy = container_of(d, struct wiphy, dev);
144
145	return wiphy_net(wiphy);
146}
147
148struct class ieee80211_class = {
149	.name = "ieee80211",
150	.owner = THIS_MODULE,
151	.dev_release = wiphy_dev_release,
152	.dev_groups = ieee80211_groups,
153	.dev_uevent = wiphy_uevent,
154#ifdef CONFIG_PM
155	.suspend = wiphy_suspend,
156	.resume = wiphy_resume,
157#endif
158	.ns_type = &net_ns_type_operations,
159	.namespace = wiphy_namespace,
160};
161
162int wiphy_sysfs_init(void)
163{
164	return class_register(&ieee80211_class);
165}
166
167void wiphy_sysfs_exit(void)
168{
169	class_unregister(&ieee80211_class);
170}
171