1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Portions 4 * Copyright (C) 2020-2021, 2023-2024 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 bool reset) 23 { 24 struct ieee80211_local *local = hw_to_local(hw); 25 struct ieee80211_sub_if_data *sdata; 26 struct sta_info *sta; 27 28 if (!local->open_count) 29 goto suspend; 30 31 local->suspending = true; 32 mb(); /* make suspending visible before any cancellation */ 33 34 ieee80211_scan_cancel(local); 35 36 ieee80211_dfs_cac_cancel(local, NULL); 37 38 ieee80211_roc_purge(local, NULL); 39 40 ieee80211_del_virtual_monitor(local); 41 42 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) && 43 !(wowlan && wowlan->any)) { 44 lockdep_assert_wiphy(local->hw.wiphy); 45 list_for_each_entry(sta, &local->sta_list, list) { 46 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 47 ieee80211_sta_tear_down_BA_sessions( 48 sta, AGG_STOP_LOCAL_REQUEST); 49 } 50 } 51 52 /* keep sched_scan only in case of 'any' trigger */ 53 if (!(wowlan && wowlan->any)) 54 ieee80211_sched_scan_cancel(local); 55 56 ieee80211_stop_queues_by_reason(hw, 57 IEEE80211_MAX_QUEUE_MAP, 58 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 59 false); 60 61 /* flush out all packets */ 62 synchronize_net(); 63 64 ieee80211_flush_queues(local, NULL, true); 65 66 local->quiescing = true; 67 /* make quiescing visible to timers everywhere */ 68 mb(); 69 70 flush_workqueue(local->workqueue); 71 72 /* Don't try to run timers while suspended. */ 73 timer_delete_sync(&local->sta_cleanup); 74 75 /* 76 * Note that this particular timer doesn't need to be 77 * restarted at resume. 78 */ 79 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 80 timer_delete_sync(&local->dynamic_ps_timer); 81 82 local->wowlan = wowlan; 83 if (local->wowlan) { 84 int err; 85 86 /* Drivers don't expect to suspend while some operations like 87 * authenticating or associating are in progress. It doesn't 88 * make sense anyway to accept that, since the authentication 89 * or association would never finish since the driver can't do 90 * that on its own. 91 * Thus, clean up in-progress auth/assoc first. 92 */ 93 list_for_each_entry(sdata, &local->interfaces, list) { 94 if (!ieee80211_sdata_running(sdata)) 95 continue; 96 if (sdata->vif.type != NL80211_IFTYPE_STATION) 97 continue; 98 ieee80211_mgd_quiesce(sdata); 99 /* If suspended during TX in progress, and wowlan 100 * is enabled (connection will be active) there 101 * can be a race where the driver is put out 102 * of power-save due to TX and during suspend 103 * dynamic_ps_timer is cancelled and TX packet 104 * is flushed, leaving the driver in ACTIVE even 105 * after resuming until dynamic_ps_timer puts 106 * driver back in DOZE. 107 */ 108 if (sdata->u.mgd.associated && 109 sdata->u.mgd.powersave && 110 !(local->hw.conf.flags & IEEE80211_CONF_PS)) { 111 local->hw.conf.flags |= IEEE80211_CONF_PS; 112 ieee80211_hw_config(local, -1, 113 IEEE80211_CONF_CHANGE_PS); 114 } 115 } 116 117 err = drv_suspend(local, wowlan); 118 if (err < 0) { 119 local->quiescing = false; 120 local->wowlan = false; 121 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 122 lockdep_assert_wiphy(local->hw.wiphy); 123 list_for_each_entry(sta, 124 &local->sta_list, list) { 125 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 126 } 127 } 128 ieee80211_wake_queues_by_reason(hw, 129 IEEE80211_MAX_QUEUE_MAP, 130 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 131 false); 132 return err; 133 } else if (err > 0) { 134 WARN_ON(err != 1); 135 /* cfg80211 will call back into mac80211 to disconnect 136 * all interfaces, allow that to proceed properly 137 */ 138 ieee80211_wake_queues_by_reason(hw, 139 IEEE80211_MAX_QUEUE_MAP, 140 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 141 false); 142 return err; 143 } else { 144 goto suspend; 145 } 146 } 147 148 /* remove all interfaces that were created in the driver */ 149 list_for_each_entry(sdata, &local->interfaces, list) { 150 if (!ieee80211_sdata_running(sdata)) 151 continue; 152 switch (sdata->vif.type) { 153 case NL80211_IFTYPE_AP_VLAN: 154 case NL80211_IFTYPE_MONITOR: 155 continue; 156 case NL80211_IFTYPE_STATION: 157 ieee80211_mgd_quiesce(sdata); 158 break; 159 default: 160 break; 161 } 162 163 wiphy_delayed_work_flush(local->hw.wiphy, 164 &sdata->dec_tailroom_needed_wk); 165 drv_remove_interface(local, sdata); 166 } 167 168 /* 169 * We disconnected on all interfaces before suspend, all channel 170 * contexts should be released, but on 'reset' debugfs that's 171 * not true so don't check there. 172 */ 173 WARN_ON(!reset && !list_empty(&local->chanctx_list)); 174 175 /* stop hardware - this must stop RX */ 176 ieee80211_stop_device(local, true); 177 178 suspend: 179 local->suspended = true; 180 /* need suspended to be visible before quiescing is false */ 181 barrier(); 182 local->quiescing = false; 183 local->suspending = false; 184 185 return 0; 186 } 187 188 /* 189 * __ieee80211_resume() is a static inline which just calls 190 * ieee80211_reconfig(), which is also needed for hardware 191 * hang/firmware failure/etc. recovery. 192 */ 193 194 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 195 struct cfg80211_wowlan_wakeup *wakeup, 196 gfp_t gfp) 197 { 198 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 199 200 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 201 } 202 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 203