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 and station cleanup call_rcu()s */ 41 synchronize_net(); 42 rcu_barrier(); 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 return err; 80 } else if (err > 0) { 81 WARN_ON(err != 1); 82 return err; 83 } else { 84 goto suspend; 85 } 86 } 87 88 /* tear down aggregation sessions and remove STAs */ 89 mutex_lock(&local->sta_mtx); 90 list_for_each_entry(sta, &local->sta_list, list) { 91 if (sta->uploaded) { 92 enum ieee80211_sta_state state; 93 94 state = sta->sta_state; 95 for (; state > IEEE80211_STA_NOTEXIST; state--) 96 WARN_ON(drv_sta_state(local, sta->sdata, sta, 97 state, state - 1)); 98 } 99 } 100 mutex_unlock(&local->sta_mtx); 101 102 /* remove all interfaces */ 103 list_for_each_entry(sdata, &local->interfaces, list) { 104 if (!ieee80211_sdata_running(sdata)) 105 continue; 106 drv_remove_interface(local, sdata); 107 } 108 109 /* 110 * We disconnected on all interfaces before suspend, all channel 111 * contexts should be released. 112 */ 113 WARN_ON(!list_empty(&local->chanctx_list)); 114 115 /* stop hardware - this must stop RX */ 116 if (local->open_count) 117 ieee80211_stop_device(local); 118 119 suspend: 120 local->suspended = true; 121 /* need suspended to be visible before quiescing is false */ 122 barrier(); 123 local->quiescing = false; 124 125 return 0; 126 } 127 128 /* 129 * __ieee80211_resume() is a static inline which just calls 130 * ieee80211_reconfig(), which is also needed for hardware 131 * hang/firmware failure/etc. recovery. 132 */ 133 134 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 135 struct cfg80211_wowlan_wakeup *wakeup, 136 gfp_t gfp) 137 { 138 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 139 140 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); 141 } 142 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); 143