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 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 23 mutex_lock(&local->sta_mtx); 24 list_for_each_entry(sta, &local->sta_list, list) { 25 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 26 ieee80211_sta_tear_down_BA_sessions( 27 sta, AGG_STOP_LOCAL_REQUEST); 28 } 29 mutex_unlock(&local->sta_mtx); 30 } 31 32 ieee80211_stop_queues_by_reason(hw, 33 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 34 35 /* flush out all packets */ 36 synchronize_net(); 37 38 drv_flush(local, false); 39 40 local->quiescing = true; 41 /* make quiescing visible to timers everywhere */ 42 mb(); 43 44 flush_workqueue(local->workqueue); 45 46 /* Don't try to run timers while suspended. */ 47 del_timer_sync(&local->sta_cleanup); 48 49 /* 50 * Note that this particular timer doesn't need to be 51 * restarted at resume. 52 */ 53 cancel_work_sync(&local->dynamic_ps_enable_work); 54 del_timer_sync(&local->dynamic_ps_timer); 55 56 local->wowlan = wowlan && local->open_count; 57 if (local->wowlan) { 58 int err = drv_suspend(local, wowlan); 59 if (err < 0) { 60 local->quiescing = false; 61 local->wowlan = false; 62 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 63 mutex_lock(&local->sta_mtx); 64 list_for_each_entry(sta, 65 &local->sta_list, list) { 66 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 67 } 68 mutex_unlock(&local->sta_mtx); 69 } 70 ieee80211_wake_queues_by_reason(hw, 71 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 72 return err; 73 } else if (err > 0) { 74 WARN_ON(err != 1); 75 return err; 76 } else { 77 goto suspend; 78 } 79 } 80 81 /* tear down aggregation sessions and remove STAs */ 82 mutex_lock(&local->sta_mtx); 83 list_for_each_entry(sta, &local->sta_list, list) { 84 if (sta->uploaded) { 85 enum ieee80211_sta_state state; 86 87 state = sta->sta_state; 88 for (; state > IEEE80211_STA_NOTEXIST; state--) 89 WARN_ON(drv_sta_state(local, sta->sdata, sta, 90 state, state - 1)); 91 } 92 } 93 mutex_unlock(&local->sta_mtx); 94 95 /* remove all interfaces */ 96 list_for_each_entry(sdata, &local->interfaces, list) { 97 if (!ieee80211_sdata_running(sdata)) 98 continue; 99 drv_remove_interface(local, sdata); 100 } 101 102 sdata = rtnl_dereference(local->monitor_sdata); 103 if (sdata) 104 drv_remove_interface(local, sdata); 105 106 /* 107 * We disconnected on all interfaces before suspend, all channel 108 * contexts should be released. 109 */ 110 WARN_ON(!list_empty(&local->chanctx_list)); 111 112 /* stop hardware - this must stop RX */ 113 if (local->open_count) 114 ieee80211_stop_device(local); 115 116 suspend: 117 local->suspended = true; 118 /* need suspended to be visible before quiescing is false */ 119 barrier(); 120 local->quiescing = false; 121 122 return 0; 123 } 124 125 /* 126 * __ieee80211_resume() is a static inline which just calls 127 * ieee80211_reconfig(), which is also needed for hardware 128 * hang/firmware failure/etc. recovery. 129 */ 130 131 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 132 struct cfg80211_wowlan_wakeup *wakeup, 133 gfp_t gfp) 134 { 135 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 136 137 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 138 } 139 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 140