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
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{
44 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
45
46 return sprintf(buf, fmt: "%s\n", wiphy_name(wiphy));
47}
48static DEVICE_ATTR_RO(name);
49
50static 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, fmt: "%pM\n", wiphy->perm_addr);
60
61 for (i = 0; i < wiphy->n_addresses; i++)
62 buf += sprintf(buf, fmt: "%pM\n", wiphy->addresses[i].addr);
63
64 return buf - start;
65}
66static DEVICE_ATTR_RO(addresses);
67
68static 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};
76ATTRIBUTE_GROUPS(ieee80211);
77
78static 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
86static 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
94static 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(wiphy: &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, wowlan: 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(wiphy: &rdev->wiphy);
122 rtnl_unlock();
123
124 return ret;
125}
126
127static 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, age_secs: ktime_get_boottime_seconds() - rdev->suspend_at);
134
135 rtnl_lock();
136 wiphy_lock(wiphy: &rdev->wiphy);
137 if (rdev->wiphy.registered && rdev->ops->resume)
138 ret = rdev_resume(rdev);
139 rdev->suspended = false;
140 queue_work(wq: system_unbound_wq, work: &rdev->wiphy_work);
141 wiphy_unlock(wiphy: &rdev->wiphy);
142
143 if (ret)
144 cfg80211_shutdown_all_interfaces(wiphy: &rdev->wiphy);
145
146 rtnl_unlock();
147
148 return ret;
149}
150
151static 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
157static 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
164struct 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
173int wiphy_sysfs_init(void)
174{
175 return class_register(class: &ieee80211_class);
176}
177
178void wiphy_sysfs_exit(void)
179{
180 class_unregister(class: &ieee80211_class);
181}
182