1 #include <net/mac80211.h>
2 #include <net/rtnetlink.h>
4 #include "ieee80211_i.h"
6 #include "driver-ops.h"
9 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
11 struct ieee80211_local *local = hw_to_local(hw);
12 struct ieee80211_sub_if_data *sdata;
15 if (!local->open_count)
18 ieee80211_scan_cancel(local);
20 ieee80211_dfs_cac_cancel(local);
22 ieee80211_roc_purge(local, NULL);
24 ieee80211_del_virtual_monitor(local);
26 if (ieee80211_hw_check(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);
33 mutex_unlock(&local->sta_mtx);
36 ieee80211_stop_queues_by_reason(hw,
37 IEEE80211_MAX_QUEUE_MAP,
38 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
41 /* flush out all packets */
44 ieee80211_flush_queues(local, NULL, true);
46 local->quiescing = true;
47 /* make quiescing visible to timers everywhere */
50 flush_workqueue(local->workqueue);
52 /* Don't try to run timers while suspended. */
53 del_timer_sync(&local->sta_cleanup);
56 * Note that this particular timer doesn't need to be
57 * restarted at resume.
59 cancel_work_sync(&local->dynamic_ps_enable_work);
60 del_timer_sync(&local->dynamic_ps_timer);
62 local->wowlan = wowlan;
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
71 * Thus, clean up in-progress auth/assoc first.
73 list_for_each_entry(sdata, &local->interfaces, list) {
74 if (!ieee80211_sdata_running(sdata))
76 if (sdata->vif.type != NL80211_IFTYPE_STATION)
78 ieee80211_mgd_quiesce(sdata);
79 /* If suspended during TX in progress, and wowlan
80 * is enabled (connection will be active) there
81 * can be a race where the driver is put out
82 * of power-save due to TX and during suspend
83 * dynamic_ps_timer is cancelled and TX packet
84 * is flushed, leaving the driver in ACTIVE even
85 * after resuming until dynamic_ps_timer puts
86 * driver back in DOZE.
88 if (sdata->u.mgd.associated &&
89 sdata->u.mgd.powersave &&
90 !(local->hw.conf.flags & IEEE80211_CONF_PS)) {
91 local->hw.conf.flags |= IEEE80211_CONF_PS;
92 ieee80211_hw_config(local,
93 IEEE80211_CONF_CHANGE_PS);
97 err = drv_suspend(local, wowlan);
99 local->quiescing = false;
100 local->wowlan = false;
101 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
102 mutex_lock(&local->sta_mtx);
103 list_for_each_entry(sta,
104 &local->sta_list, list) {
105 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
107 mutex_unlock(&local->sta_mtx);
109 ieee80211_wake_queues_by_reason(hw,
110 IEEE80211_MAX_QUEUE_MAP,
111 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
114 } else if (err > 0) {
116 /* cfg80211 will call back into mac80211 to disconnect
117 * all interfaces, allow that to proceed properly
119 ieee80211_wake_queues_by_reason(hw,
120 IEEE80211_MAX_QUEUE_MAP,
121 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
129 /* remove all interfaces that were created in the driver */
130 list_for_each_entry(sdata, &local->interfaces, list) {
131 if (!ieee80211_sdata_running(sdata))
133 switch (sdata->vif.type) {
134 case NL80211_IFTYPE_AP_VLAN:
135 case NL80211_IFTYPE_MONITOR:
137 case NL80211_IFTYPE_STATION:
138 ieee80211_mgd_quiesce(sdata);
140 case NL80211_IFTYPE_WDS:
141 /* tear down aggregation sessions and remove STAs */
142 mutex_lock(&local->sta_mtx);
143 sta = sdata->u.wds.sta;
144 if (sta && sta->uploaded) {
145 enum ieee80211_sta_state state;
147 state = sta->sta_state;
148 for (; state > IEEE80211_STA_NOTEXIST; state--)
149 WARN_ON(drv_sta_state(local, sta->sdata,
153 mutex_unlock(&local->sta_mtx);
159 drv_remove_interface(local, sdata);
163 * We disconnected on all interfaces before suspend, all channel
164 * contexts should be released.
166 WARN_ON(!list_empty(&local->chanctx_list));
168 /* stop hardware - this must stop RX */
169 if (local->open_count)
170 ieee80211_stop_device(local);
173 local->suspended = true;
174 /* need suspended to be visible before quiescing is false */
176 local->quiescing = false;
182 * __ieee80211_resume() is a static inline which just calls
183 * ieee80211_reconfig(), which is also needed for hardware
184 * hang/firmware failure/etc. recovery.
187 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
188 struct cfg80211_wowlan_wakeup *wakeup,
191 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
193 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
195 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);