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 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, "%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, "%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} 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(&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 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, 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 schedule_work(&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 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(&ieee80211_class); 176} 177 178void wiphy_sysfs_exit(void) 179{ 180 class_unregister(&ieee80211_class); 181} 182