1 #include <net/mac80211.h>
2 #include <net/rtnetlink.h>
4 #include "ieee80211_i.h"
6 #include "driver-ops.h"
9 /* return value indicates whether the driver should be further notified */
10 static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
12 switch (sdata->vif.type) {
13 case NL80211_IFTYPE_STATION:
14 ieee80211_sta_quiesce(sdata);
16 case NL80211_IFTYPE_ADHOC:
17 ieee80211_ibss_quiesce(sdata);
19 case NL80211_IFTYPE_MESH_POINT:
20 ieee80211_mesh_quiesce(sdata);
22 case NL80211_IFTYPE_AP_VLAN:
23 case NL80211_IFTYPE_MONITOR:
24 /* don't tell driver about this */
31 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
33 struct ieee80211_local *local = hw_to_local(hw);
34 struct ieee80211_sub_if_data *sdata;
36 struct ieee80211_chanctx *ctx;
38 if (!local->open_count)
41 ieee80211_scan_cancel(local);
43 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
44 mutex_lock(&local->sta_mtx);
45 list_for_each_entry(sta, &local->sta_list, list) {
46 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
47 ieee80211_sta_tear_down_BA_sessions(sta, true);
49 mutex_unlock(&local->sta_mtx);
52 ieee80211_stop_queues_by_reason(hw,
53 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
55 /* flush out all packets */
58 drv_flush(local, false);
60 local->quiescing = true;
61 /* make quiescing visible to timers everywhere */
64 flush_workqueue(local->workqueue);
66 /* Don't try to run timers while suspended. */
67 del_timer_sync(&local->sta_cleanup);
70 * Note that this particular timer doesn't need to be
71 * restarted at resume.
73 cancel_work_sync(&local->dynamic_ps_enable_work);
74 del_timer_sync(&local->dynamic_ps_timer);
76 local->wowlan = wowlan && local->open_count;
78 int err = drv_suspend(local, wowlan);
80 local->quiescing = false;
81 local->wowlan = false;
82 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
83 mutex_lock(&local->sta_mtx);
84 list_for_each_entry(sta,
85 &local->sta_list, list) {
86 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
88 mutex_unlock(&local->sta_mtx);
90 ieee80211_wake_queues_by_reason(hw,
91 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
95 local->wowlan = false;
97 list_for_each_entry(sdata, &local->interfaces, list) {
98 cancel_work_sync(&sdata->work);
99 ieee80211_quiesce(sdata);
106 list_for_each_entry(sdata, &local->interfaces, list)
107 ieee80211_disable_keys(sdata);
109 /* tear down aggregation sessions and remove STAs */
110 mutex_lock(&local->sta_mtx);
111 list_for_each_entry(sta, &local->sta_list, list) {
113 enum ieee80211_sta_state state;
115 state = sta->sta_state;
116 for (; state > IEEE80211_STA_NOTEXIST; state--)
117 WARN_ON(drv_sta_state(local, sta->sdata, sta,
121 mesh_plink_quiesce(sta);
123 mutex_unlock(&local->sta_mtx);
125 /* remove all interfaces */
126 list_for_each_entry(sdata, &local->interfaces, list) {
127 cancel_work_sync(&sdata->work);
129 if (!ieee80211_quiesce(sdata))
132 if (!ieee80211_sdata_running(sdata))
135 /* disable beaconing */
136 ieee80211_bss_info_change_notify(sdata,
137 BSS_CHANGED_BEACON_ENABLED);
139 if (sdata->vif.type == NL80211_IFTYPE_AP &&
140 rcu_access_pointer(sdata->u.ap.beacon))
141 drv_stop_ap(local, sdata);
143 if (local->use_chanctx) {
144 struct ieee80211_chanctx_conf *conf;
146 mutex_lock(&local->chanctx_mtx);
147 conf = rcu_dereference_protected(
148 sdata->vif.chanctx_conf,
149 lockdep_is_held(&local->chanctx_mtx));
151 ctx = container_of(conf,
152 struct ieee80211_chanctx,
154 drv_unassign_vif_chanctx(local, sdata, ctx);
157 mutex_unlock(&local->chanctx_mtx);
159 drv_remove_interface(local, sdata);
162 sdata = rtnl_dereference(local->monitor_sdata);
164 if (local->use_chanctx) {
165 struct ieee80211_chanctx_conf *conf;
167 mutex_lock(&local->chanctx_mtx);
168 conf = rcu_dereference_protected(
169 sdata->vif.chanctx_conf,
170 lockdep_is_held(&local->chanctx_mtx));
172 ctx = container_of(conf,
173 struct ieee80211_chanctx,
175 drv_unassign_vif_chanctx(local, sdata, ctx);
178 mutex_unlock(&local->chanctx_mtx);
181 drv_remove_interface(local, sdata);
184 mutex_lock(&local->chanctx_mtx);
185 list_for_each_entry(ctx, &local->chanctx_list, list)
186 drv_remove_chanctx(local, ctx);
187 mutex_unlock(&local->chanctx_mtx);
189 /* stop hardware - this must stop RX */
190 if (local->open_count)
191 ieee80211_stop_device(local);
194 local->suspended = true;
195 /* need suspended to be visible before quiescing is false */
197 local->quiescing = false;
203 * __ieee80211_resume() is a static inline which just calls
204 * ieee80211_reconfig(), which is also needed for hardware
205 * hang/firmware failure/etc. recovery.