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