1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Portions 4 * Copyright (C) 2020-2021, 2023 Intel Corporation 5 */ 6 #include <net/mac80211.h> 7 #include <net/rtnetlink.h> 8 9 #include "ieee80211_i.h" 10 #include "mesh.h" 11 #include "driver-ops.h" 12 #include "led.h" 13 14 static void ieee80211_sched_scan_cancel(struct ieee80211_local *local) 15 { 16 if (ieee80211_request_sched_scan_stop(local)) 17 return; 18 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 19 } 20 21 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) 22 { 23 struct ieee80211_local *local = hw_to_local(hw); 24 struct ieee80211_sub_if_data *sdata; 25 struct sta_info *sta; 26 27 if (!local->open_count) 28 goto suspend; 29 30 local->suspending = true; 31 mb(); /* make suspending visible before any cancellation */ 32 33 ieee80211_scan_cancel(local); 34 35 ieee80211_dfs_cac_cancel(local); 36 37 ieee80211_roc_purge(local, NULL); 38 39 ieee80211_del_virtual_monitor(local); 40 41 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) && 42 !(wowlan && wowlan->any)) { 43 lockdep_assert_wiphy(local->hw.wiphy); 44 list_for_each_entry(sta, &local->sta_list, list) { 45 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 46 ieee80211_sta_tear_down_BA_sessions( 47 sta, AGG_STOP_LOCAL_REQUEST); 48 } 49 } 50 51 /* keep sched_scan only in case of 'any' trigger */ 52 if (!(wowlan && wowlan->any)) 53 ieee80211_sched_scan_cancel(local); 54 55 ieee80211_stop_queues_by_reason(hw, 56 IEEE80211_MAX_QUEUE_MAP, 57 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 58 false); 59 60 /* flush out all packets */ 61 synchronize_net(); 62 63 ieee80211_flush_queues(local, NULL, true); 64 65 local->quiescing = true; 66 /* make quiescing visible to timers everywhere */ 67 mb(); 68 69 flush_workqueue(local->workqueue); 70 71 /* Don't try to run timers while suspended. */ 72 del_timer_sync(&local->sta_cleanup); 73 74 /* 75 * Note that this particular timer doesn't need to be 76 * restarted at resume. 77 */ 78 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 79 del_timer_sync(&local->dynamic_ps_timer); 80 81 local->wowlan = wowlan; 82 if (local->wowlan) { 83 int err; 84 85 /* Drivers don't expect to suspend while some operations like 86 * authenticating or associating are in progress. It doesn't 87 * make sense anyway to accept that, since the authentication 88 * or association would never finish since the driver can't do 89 * that on its own. 90 * Thus, clean up in-progress auth/assoc first. 91 */ 92 list_for_each_entry(sdata, &local->interfaces, list) { 93 if (!ieee80211_sdata_running(sdata)) 94 continue; 95 if (sdata->vif.type != NL80211_IFTYPE_STATION) 96 continue; 97 ieee80211_mgd_quiesce(sdata); 98 /* If suspended during TX in progress, and wowlan 99 * is enabled (connection will be active) there 100 * can be a race where the driver is put out 101 * of power-save due to TX and during suspend 102 * dynamic_ps_timer is cancelled and TX packet 103 * is flushed, leaving the driver in ACTIVE even 104 * after resuming until dynamic_ps_timer puts 105 * driver back in DOZE. 106 */ 107 if (sdata->u.mgd.associated && 108 sdata->u.mgd.powersave && 109 !(local->hw.conf.flags & IEEE80211_CONF_PS)) { 110 local->hw.conf.flags |= IEEE80211_CONF_PS; 111 ieee80211_hw_config(local, 112 IEEE80211_CONF_CHANGE_PS); 113 } 114 } 115 116 err = drv_suspend(local, wowlan); 117 if (err < 0) { 118 local->quiescing = false; 119 local->wowlan = false; 120 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 121 lockdep_assert_wiphy(local->hw.wiphy); 122 list_for_each_entry(sta, 123 &local->sta_list, list) { 124 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 125 } 126 } 127 ieee80211_wake_queues_by_reason(hw, 128 IEEE80211_MAX_QUEUE_MAP, 129 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 130 false); 131 return err; 132 } else if (err > 0) { 133 WARN_ON(err != 1); 134 /* cfg80211 will call back into mac80211 to disconnect 135 * all interfaces, allow that to proceed properly 136 */ 137 ieee80211_wake_queues_by_reason(hw, 138 IEEE80211_MAX_QUEUE_MAP, 139 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 140 false); 141 return err; 142 } else { 143 goto suspend; 144 } 145 } 146 147 /* remove all interfaces that were created in the driver */ 148 list_for_each_entry(sdata, &local->interfaces, list) { 149 if (!ieee80211_sdata_running(sdata)) 150 continue; 151 switch (sdata->vif.type) { 152 case NL80211_IFTYPE_AP_VLAN: 153 case NL80211_IFTYPE_MONITOR: 154 continue; 155 case NL80211_IFTYPE_STATION: 156 ieee80211_mgd_quiesce(sdata); 157 break; 158 default: 159 break; 160 } 161 162 wiphy_delayed_work_flush(local->hw.wiphy, 163 &sdata->dec_tailroom_needed_wk); 164 drv_remove_interface(local, sdata); 165 } 166 167 /* 168 * We disconnected on all interfaces before suspend, all channel 169 * contexts should be released. 170 */ 171 WARN_ON(!list_empty(&local->chanctx_list)); 172 173 /* stop hardware - this must stop RX */ 174 ieee80211_stop_device(local); 175 176 suspend: 177 local->suspended = true; 178 /* need suspended to be visible before quiescing is false */ 179 barrier(); 180 local->quiescing = false; 181 local->suspending = false; 182 183 return 0; 184 } 185 186 /* 187 * __ieee80211_resume() is a static inline which just calls 188 * ieee80211_reconfig(), which is also needed for hardware 189 * hang/firmware failure/etc. recovery. 190 */ 191 192 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 193 struct cfg80211_wowlan_wakeup *wakeup, 194 gfp_t gfp) 195 { 196 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 197 198 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 199 } 200 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 201