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 40 /* flush out all packets */ 41 synchronize_net(); 42 43 ieee80211_flush_queues(local, NULL); 44 45 local->quiescing = true; 46 /* make quiescing visible to timers everywhere */ 47 mb(); 48 49 flush_workqueue(local->workqueue); 50 51 /* Don't try to run timers while suspended. */ 52 del_timer_sync(&local->sta_cleanup); 53 54 /* 55 * Note that this particular timer doesn't need to be 56 * restarted at resume. 57 */ 58 cancel_work_sync(&local->dynamic_ps_enable_work); 59 del_timer_sync(&local->dynamic_ps_timer); 60 61 local->wowlan = wowlan && local->open_count; 62 if (local->wowlan) { 63 int err = drv_suspend(local, wowlan); 64 if (err < 0) { 65 local->quiescing = false; 66 local->wowlan = false; 67 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 68 mutex_lock(&local->sta_mtx); 69 list_for_each_entry(sta, 70 &local->sta_list, list) { 71 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 72 } 73 mutex_unlock(&local->sta_mtx); 74 } 75 ieee80211_wake_queues_by_reason(hw, 76 IEEE80211_MAX_QUEUE_MAP, 77 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 78 return err; 79 } else if (err > 0) { 80 WARN_ON(err != 1); 81 return err; 82 } else { 83 goto suspend; 84 } 85 } 86 87 /* tear down aggregation sessions and remove STAs */ 88 mutex_lock(&local->sta_mtx); 89 list_for_each_entry(sta, &local->sta_list, list) { 90 if (sta->uploaded) { 91 enum ieee80211_sta_state state; 92 93 state = sta->sta_state; 94 for (; state > IEEE80211_STA_NOTEXIST; state--) 95 WARN_ON(drv_sta_state(local, sta->sdata, sta, 96 state, state - 1)); 97 } 98 } 99 mutex_unlock(&local->sta_mtx); 100 101 /* remove all interfaces that were created in the driver */ 102 list_for_each_entry(sdata, &local->interfaces, list) { 103 if (!ieee80211_sdata_running(sdata)) 104 continue; 105 switch (sdata->vif.type) { 106 case NL80211_IFTYPE_AP_VLAN: 107 case NL80211_IFTYPE_MONITOR: 108 continue; 109 case NL80211_IFTYPE_STATION: 110 ieee80211_mgd_quiesce(sdata); 111 break; 112 default: 113 break; 114 } 115 116 drv_remove_interface(local, sdata); 117 } 118 119 /* 120 * We disconnected on all interfaces before suspend, all channel 121 * contexts should be released. 122 */ 123 WARN_ON(!list_empty(&local->chanctx_list)); 124 125 /* stop hardware - this must stop RX */ 126 if (local->open_count) 127 ieee80211_stop_device(local); 128 129 suspend: 130 local->suspended = true; 131 /* need suspended to be visible before quiescing is false */ 132 barrier(); 133 local->quiescing = false; 134 135 return 0; 136 } 137 138 /* 139 * __ieee80211_resume() is a static inline which just calls 140 * ieee80211_reconfig(), which is also needed for hardware 141 * hang/firmware failure/etc. recovery. 142 */ 143 144 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 145 struct cfg80211_wowlan_wakeup *wakeup, 146 gfp_t gfp) 147 { 148 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 149 150 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 151 } 152 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 153