1 // SPDX-License-Identifier: GPL-2.0 2 #include <net/mac80211.h> 3 #include <net/rtnetlink.h> 4 5 #include "ieee80211_i.h" 6 #include "mesh.h" 7 #include "driver-ops.h" 8 #include "led.h" 9 10 static void ieee80211_sched_scan_cancel(struct ieee80211_local *local) 11 { 12 if (ieee80211_request_sched_scan_stop(local)) 13 return; 14 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 15 } 16 17 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) 18 { 19 struct ieee80211_local *local = hw_to_local(hw); 20 struct ieee80211_sub_if_data *sdata; 21 struct sta_info *sta; 22 23 if (!local->open_count) 24 goto suspend; 25 26 ieee80211_scan_cancel(local); 27 28 ieee80211_dfs_cac_cancel(local); 29 30 ieee80211_roc_purge(local, NULL); 31 32 ieee80211_del_virtual_monitor(local); 33 34 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) && 35 !(wowlan && wowlan->any)) { 36 mutex_lock(&local->sta_mtx); 37 list_for_each_entry(sta, &local->sta_list, list) { 38 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 39 ieee80211_sta_tear_down_BA_sessions( 40 sta, AGG_STOP_LOCAL_REQUEST); 41 } 42 mutex_unlock(&local->sta_mtx); 43 } 44 45 /* keep sched_scan only in case of 'any' trigger */ 46 if (!(wowlan && wowlan->any)) 47 ieee80211_sched_scan_cancel(local); 48 49 ieee80211_stop_queues_by_reason(hw, 50 IEEE80211_MAX_QUEUE_MAP, 51 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 52 false); 53 54 /* flush out all packets */ 55 synchronize_net(); 56 57 ieee80211_flush_queues(local, NULL, true); 58 59 local->quiescing = true; 60 /* make quiescing visible to timers everywhere */ 61 mb(); 62 63 flush_workqueue(local->workqueue); 64 65 /* Don't try to run timers while suspended. */ 66 del_timer_sync(&local->sta_cleanup); 67 68 /* 69 * Note that this particular timer doesn't need to be 70 * restarted at resume. 71 */ 72 cancel_work_sync(&local->dynamic_ps_enable_work); 73 del_timer_sync(&local->dynamic_ps_timer); 74 75 local->wowlan = wowlan; 76 if (local->wowlan) { 77 int err; 78 79 /* Drivers don't expect to suspend while some operations like 80 * authenticating or associating are in progress. It doesn't 81 * make sense anyway to accept that, since the authentication 82 * or association would never finish since the driver can't do 83 * that on its own. 84 * Thus, clean up in-progress auth/assoc first. 85 */ 86 list_for_each_entry(sdata, &local->interfaces, list) { 87 if (!ieee80211_sdata_running(sdata)) 88 continue; 89 if (sdata->vif.type != NL80211_IFTYPE_STATION) 90 continue; 91 ieee80211_mgd_quiesce(sdata); 92 /* If suspended during TX in progress, and wowlan 93 * is enabled (connection will be active) there 94 * can be a race where the driver is put out 95 * of power-save due to TX and during suspend 96 * dynamic_ps_timer is cancelled and TX packet 97 * is flushed, leaving the driver in ACTIVE even 98 * after resuming until dynamic_ps_timer puts 99 * driver back in DOZE. 100 */ 101 if (sdata->u.mgd.associated && 102 sdata->u.mgd.powersave && 103 !(local->hw.conf.flags & IEEE80211_CONF_PS)) { 104 local->hw.conf.flags |= IEEE80211_CONF_PS; 105 ieee80211_hw_config(local, 106 IEEE80211_CONF_CHANGE_PS); 107 } 108 } 109 110 err = drv_suspend(local, wowlan); 111 if (err < 0) { 112 local->quiescing = false; 113 local->wowlan = false; 114 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 115 mutex_lock(&local->sta_mtx); 116 list_for_each_entry(sta, 117 &local->sta_list, list) { 118 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 119 } 120 mutex_unlock(&local->sta_mtx); 121 } 122 ieee80211_wake_queues_by_reason(hw, 123 IEEE80211_MAX_QUEUE_MAP, 124 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 125 false); 126 return err; 127 } else if (err > 0) { 128 WARN_ON(err != 1); 129 /* cfg80211 will call back into mac80211 to disconnect 130 * all interfaces, allow that to proceed properly 131 */ 132 ieee80211_wake_queues_by_reason(hw, 133 IEEE80211_MAX_QUEUE_MAP, 134 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 135 false); 136 return err; 137 } else { 138 goto suspend; 139 } 140 } 141 142 /* remove all interfaces that were created in the driver */ 143 list_for_each_entry(sdata, &local->interfaces, list) { 144 if (!ieee80211_sdata_running(sdata)) 145 continue; 146 switch (sdata->vif.type) { 147 case NL80211_IFTYPE_AP_VLAN: 148 case NL80211_IFTYPE_MONITOR: 149 continue; 150 case NL80211_IFTYPE_STATION: 151 ieee80211_mgd_quiesce(sdata); 152 break; 153 case NL80211_IFTYPE_WDS: 154 /* tear down aggregation sessions and remove STAs */ 155 mutex_lock(&local->sta_mtx); 156 sta = sdata->u.wds.sta; 157 if (sta && sta->uploaded) { 158 enum ieee80211_sta_state state; 159 160 state = sta->sta_state; 161 for (; state > IEEE80211_STA_NOTEXIST; state--) 162 WARN_ON(drv_sta_state(local, sta->sdata, 163 sta, state, 164 state - 1)); 165 } 166 mutex_unlock(&local->sta_mtx); 167 break; 168 default: 169 break; 170 } 171 172 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 173 drv_remove_interface(local, sdata); 174 } 175 176 /* 177 * We disconnected on all interfaces before suspend, all channel 178 * contexts should be released. 179 */ 180 WARN_ON(!list_empty(&local->chanctx_list)); 181 182 /* stop hardware - this must stop RX */ 183 ieee80211_stop_device(local); 184 185 suspend: 186 local->suspended = true; 187 /* need suspended to be visible before quiescing is false */ 188 barrier(); 189 local->quiescing = false; 190 191 return 0; 192 } 193 194 /* 195 * __ieee80211_resume() is a static inline which just calls 196 * ieee80211_reconfig(), which is also needed for hardware 197 * hang/firmware failure/etc. recovery. 198 */ 199 200 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 201 struct cfg80211_wowlan_wakeup *wakeup, 202 gfp_t gfp) 203 { 204 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 205 206 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 207 } 208 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 209