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 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 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 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 } 99 100 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 wiphy_lock(&rdev->wiphy); 109 if (rdev->wiphy.registered) { 110 if (!rdev->wiphy.wowlan_config) { 111 cfg80211_leave_all(rdev); 112 cfg80211_process_rdev_events(rdev); 113 } 114 if (rdev->ops->suspend) 115 ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config); 116 if (ret == 1) { 117 /* Driver refuse to configure wowlan */ 118 cfg80211_leave_all(rdev); 119 cfg80211_process_rdev_events(rdev); 120 ret = rdev_suspend(rdev, NULL); 121 } 122 } 123 wiphy_unlock(&rdev->wiphy); 124 rtnl_unlock(); 125 126 return ret; 127 } 128 129 static int wiphy_resume(struct device *dev) 130 { 131 struct cfg80211_registered_device *rdev = dev_to_rdev(dev); 132 int ret = 0; 133 134 /* Age scan results with time spent in suspend */ 135 cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at); 136 137 rtnl_lock(); 138 wiphy_lock(&rdev->wiphy); 139 if (rdev->wiphy.registered && rdev->ops->resume) 140 ret = rdev_resume(rdev); 141 wiphy_unlock(&rdev->wiphy); 142 rtnl_unlock(); 143 144 return ret; 145 } 146 147 static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume); 148 #define WIPHY_PM_OPS (&wiphy_pm_ops) 149 #else 150 #define WIPHY_PM_OPS NULL 151 #endif 152 153 static const void *wiphy_namespace(struct device *d) 154 { 155 struct wiphy *wiphy = container_of(d, struct wiphy, dev); 156 157 return wiphy_net(wiphy); 158 } 159 160 struct class ieee80211_class = { 161 .name = "ieee80211", 162 .owner = THIS_MODULE, 163 .dev_release = wiphy_dev_release, 164 .dev_groups = ieee80211_groups, 165 .dev_uevent = wiphy_uevent, 166 .pm = WIPHY_PM_OPS, 167 .ns_type = &net_ns_type_operations, 168 .namespace = wiphy_namespace, 169 }; 170 171 int wiphy_sysfs_init(void) 172 { 173 return class_register(&ieee80211_class); 174 } 175 176 void wiphy_sysfs_exit(void) 177 { 178 class_unregister(&ieee80211_class); 179 } 180