1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This file provides /sys/class/ieee80211/<wiphy name>/
4 * and some default attributes.
5 *
6 * Copyright 2005-2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright (C) 2020-2021, 2023-2024 Intel Corporation
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
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
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
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
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
85 #ifdef CONFIG_PM_SLEEP
86 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
87 {
88 struct wireless_dev *wdev;
89
90 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
91 cfg80211_leave(rdev, wdev);
92 }
93
94 static int wiphy_suspend(struct device *dev)
95 {
96 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
97 int ret = 0;
98
99 rdev->suspend_at = ktime_get_boottime_seconds();
100
101 rtnl_lock();
102 wiphy_lock(&rdev->wiphy);
103 if (rdev->wiphy.registered) {
104 if (!rdev->wiphy.wowlan_config) {
105 cfg80211_leave_all(rdev);
106 cfg80211_process_rdev_events(rdev);
107 }
108 cfg80211_process_wiphy_works(rdev, NULL);
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 cfg80211_process_rdev_events(rdev);
115 cfg80211_process_wiphy_works(rdev, NULL);
116 ret = rdev_suspend(rdev, NULL);
117 }
118 if (ret == 0)
119 rdev->suspended = true;
120 }
121 wiphy_unlock(&rdev->wiphy);
122 rtnl_unlock();
123
124 return ret;
125 }
126
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 wiphy_lock(&rdev->wiphy);
137 if (rdev->wiphy.registered && rdev->ops->resume)
138 ret = rdev_resume(rdev);
139 rdev->suspended = false;
140 queue_work(system_unbound_wq, &rdev->wiphy_work);
141 wiphy_unlock(&rdev->wiphy);
142
143 if (ret)
144 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
145
146 rtnl_unlock();
147
148 return ret;
149 }
150
151 static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
152 #define WIPHY_PM_OPS (&wiphy_pm_ops)
153 #else
154 #define WIPHY_PM_OPS NULL
155 #endif
156
157 static const void *wiphy_namespace(const struct device *d)
158 {
159 struct wiphy *wiphy = container_of(d, struct wiphy, dev);
160
161 return wiphy_net(wiphy);
162 }
163
164 struct class ieee80211_class = {
165 .name = "ieee80211",
166 .dev_release = wiphy_dev_release,
167 .dev_groups = ieee80211_groups,
168 .pm = WIPHY_PM_OPS,
169 .ns_type = &net_ns_type_operations,
170 .namespace = wiphy_namespace,
171 };
172
173 int wiphy_sysfs_init(void)
174 {
175 return class_register(&ieee80211_class);
176 }
177
178 void wiphy_sysfs_exit(void)
179 {
180 class_unregister(&ieee80211_class);
181 }
182
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