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 (hw->flags & IEEE80211_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 } 80 81 err = drv_suspend(local, wowlan); 82 if (err < 0) { 83 local->quiescing = false; 84 local->wowlan = false; 85 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 86 mutex_lock(&local->sta_mtx); 87 list_for_each_entry(sta, 88 &local->sta_list, list) { 89 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 90 } 91 mutex_unlock(&local->sta_mtx); 92 } 93 ieee80211_wake_queues_by_reason(hw, 94 IEEE80211_MAX_QUEUE_MAP, 95 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 96 false); 97 return err; 98 } else if (err > 0) { 99 WARN_ON(err != 1); 100 /* cfg80211 will call back into mac80211 to disconnect 101 * all interfaces, allow that to proceed properly 102 */ 103 ieee80211_wake_queues_by_reason(hw, 104 IEEE80211_MAX_QUEUE_MAP, 105 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 106 false); 107 return err; 108 } else { 109 goto suspend; 110 } 111 } 112 113 /* remove all interfaces that were created in the driver */ 114 list_for_each_entry(sdata, &local->interfaces, list) { 115 if (!ieee80211_sdata_running(sdata)) 116 continue; 117 switch (sdata->vif.type) { 118 case NL80211_IFTYPE_AP_VLAN: 119 case NL80211_IFTYPE_MONITOR: 120 continue; 121 case NL80211_IFTYPE_STATION: 122 ieee80211_mgd_quiesce(sdata); 123 break; 124 case NL80211_IFTYPE_WDS: 125 /* tear down aggregation sessions and remove STAs */ 126 mutex_lock(&local->sta_mtx); 127 sta = sdata->u.wds.sta; 128 if (sta && sta->uploaded) { 129 enum ieee80211_sta_state state; 130 131 state = sta->sta_state; 132 for (; state > IEEE80211_STA_NOTEXIST; state--) 133 WARN_ON(drv_sta_state(local, sta->sdata, 134 sta, state, 135 state - 1)); 136 } 137 mutex_unlock(&local->sta_mtx); 138 break; 139 default: 140 break; 141 } 142 143 drv_remove_interface(local, sdata); 144 } 145 146 /* 147 * We disconnected on all interfaces before suspend, all channel 148 * contexts should be released. 149 */ 150 WARN_ON(!list_empty(&local->chanctx_list)); 151 152 /* stop hardware - this must stop RX */ 153 if (local->open_count) 154 ieee80211_stop_device(local); 155 156 suspend: 157 local->suspended = true; 158 /* need suspended to be visible before quiescing is false */ 159 barrier(); 160 local->quiescing = false; 161 162 return 0; 163 } 164 165 /* 166 * __ieee80211_resume() is a static inline which just calls 167 * ieee80211_reconfig(), which is also needed for hardware 168 * hang/firmware failure/etc. recovery. 169 */ 170 171 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 172 struct cfg80211_wowlan_wakeup *wakeup, 173 gfp_t gfp) 174 { 175 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 176 177 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 178 } 179 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 180