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); 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 && local->open_count; 63 if (local->wowlan) { 64 int err = drv_suspend(local, wowlan); 65 if (err < 0) { 66 local->quiescing = false; 67 local->wowlan = false; 68 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 69 mutex_lock(&local->sta_mtx); 70 list_for_each_entry(sta, 71 &local->sta_list, list) { 72 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 73 } 74 mutex_unlock(&local->sta_mtx); 75 } 76 ieee80211_wake_queues_by_reason(hw, 77 IEEE80211_MAX_QUEUE_MAP, 78 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 79 false); 80 return err; 81 } else if (err > 0) { 82 WARN_ON(err != 1); 83 return err; 84 } else { 85 goto suspend; 86 } 87 } 88 89 /* tear down aggregation sessions and remove STAs */ 90 mutex_lock(&local->sta_mtx); 91 list_for_each_entry(sta, &local->sta_list, list) { 92 if (sta->uploaded) { 93 enum ieee80211_sta_state state; 94 95 state = sta->sta_state; 96 for (; state > IEEE80211_STA_NOTEXIST; state--) 97 WARN_ON(drv_sta_state(local, sta->sdata, sta, 98 state, state - 1)); 99 } 100 } 101 mutex_unlock(&local->sta_mtx); 102 103 /* remove all interfaces that were created in the driver */ 104 list_for_each_entry(sdata, &local->interfaces, list) { 105 if (!ieee80211_sdata_running(sdata)) 106 continue; 107 switch (sdata->vif.type) { 108 case NL80211_IFTYPE_AP_VLAN: 109 case NL80211_IFTYPE_MONITOR: 110 continue; 111 case NL80211_IFTYPE_STATION: 112 ieee80211_mgd_quiesce(sdata); 113 break; 114 default: 115 break; 116 } 117 118 drv_remove_interface(local, sdata); 119 } 120 121 /* 122 * We disconnected on all interfaces before suspend, all channel 123 * contexts should be released. 124 */ 125 WARN_ON(!list_empty(&local->chanctx_list)); 126 127 /* stop hardware - this must stop RX */ 128 if (local->open_count) 129 ieee80211_stop_device(local); 130 131 suspend: 132 local->suspended = true; 133 /* need suspended to be visible before quiescing is false */ 134 barrier(); 135 local->quiescing = false; 136 137 return 0; 138 } 139 140 /* 141 * __ieee80211_resume() is a static inline which just calls 142 * ieee80211_reconfig(), which is also needed for hardware 143 * hang/firmware failure/etc. recovery. 144 */ 145 146 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 147 struct cfg80211_wowlan_wakeup *wakeup, 148 gfp_t gfp) 149 { 150 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 151 152 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 153 } 154 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 155