pm.c (5359B)
1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Portions 4 * Copyright (C) 2020-2021 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 14static 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 21int __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 mutex_lock(&local->sta_mtx); 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 mutex_unlock(&local->sta_mtx); 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 del_timer_sync(&local->sta_cleanup); 74 75 /* 76 * Note that this particular timer doesn't need to be 77 * restarted at resume. 78 */ 79 cancel_work_sync(&local->dynamic_ps_enable_work); 80 del_timer_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, 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 mutex_lock(&local->sta_mtx); 123 list_for_each_entry(sta, 124 &local->sta_list, list) { 125 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 126 } 127 mutex_unlock(&local->sta_mtx); 128 } 129 ieee80211_wake_queues_by_reason(hw, 130 IEEE80211_MAX_QUEUE_MAP, 131 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 132 false); 133 return err; 134 } else if (err > 0) { 135 WARN_ON(err != 1); 136 /* cfg80211 will call back into mac80211 to disconnect 137 * all interfaces, allow that to proceed properly 138 */ 139 ieee80211_wake_queues_by_reason(hw, 140 IEEE80211_MAX_QUEUE_MAP, 141 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 142 false); 143 return err; 144 } else { 145 goto suspend; 146 } 147 } 148 149 /* remove all interfaces that were created in the driver */ 150 list_for_each_entry(sdata, &local->interfaces, list) { 151 if (!ieee80211_sdata_running(sdata)) 152 continue; 153 switch (sdata->vif.type) { 154 case NL80211_IFTYPE_AP_VLAN: 155 case NL80211_IFTYPE_MONITOR: 156 continue; 157 case NL80211_IFTYPE_STATION: 158 ieee80211_mgd_quiesce(sdata); 159 break; 160 default: 161 break; 162 } 163 164 flush_delayed_work(&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. 171 */ 172 WARN_ON(!list_empty(&local->chanctx_list)); 173 174 /* stop hardware - this must stop RX */ 175 ieee80211_stop_device(local); 176 177 suspend: 178 local->suspended = true; 179 /* need suspended to be visible before quiescing is false */ 180 barrier(); 181 local->quiescing = false; 182 local->suspending = false; 183 184 return 0; 185} 186 187/* 188 * __ieee80211_resume() is a static inline which just calls 189 * ieee80211_reconfig(), which is also needed for hardware 190 * hang/firmware failure/etc. recovery. 191 */ 192 193void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 194 struct cfg80211_wowlan_wakeup *wakeup, 195 gfp_t gfp) 196{ 197 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 198 199 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 200} 201EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);