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 void 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);
26 cancel_work_sync(&sdata->work);
29 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
31 struct ieee80211_local *local = hw_to_local(hw);
32 struct ieee80211_sub_if_data *sdata;
34 struct ieee80211_chanctx *ctx;
36 if (!local->open_count)
39 ieee80211_scan_cancel(local);
41 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
42 mutex_lock(&local->sta_mtx);
43 list_for_each_entry(sta, &local->sta_list, list) {
44 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
45 ieee80211_sta_tear_down_BA_sessions(
46 sta, AGG_STOP_LOCAL_REQUEST);
48 mutex_unlock(&local->sta_mtx);
51 ieee80211_stop_queues_by_reason(hw,
52 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
54 /* flush out all packets */
57 drv_flush(local, false);
59 local->quiescing = true;
60 /* make quiescing visible to timers everywhere */
63 flush_workqueue(local->workqueue);
65 /* Don't try to run timers while suspended. */
66 del_timer_sync(&local->sta_cleanup);
69 * Note that this particular timer doesn't need to be
70 * restarted at resume.
72 cancel_work_sync(&local->dynamic_ps_enable_work);
73 del_timer_sync(&local->dynamic_ps_timer);
75 local->wowlan = wowlan && local->open_count;
77 int err = drv_suspend(local, wowlan);
79 local->quiescing = false;
80 local->wowlan = false;
81 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
82 mutex_lock(&local->sta_mtx);
83 list_for_each_entry(sta,
84 &local->sta_list, list) {
85 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
87 mutex_unlock(&local->sta_mtx);
89 ieee80211_wake_queues_by_reason(hw,
90 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
94 local->wowlan = false;
96 list_for_each_entry(sdata, &local->interfaces, list)
97 if (ieee80211_sdata_running(sdata))
98 ieee80211_quiesce(sdata);
104 list_for_each_entry(sdata, &local->interfaces, list)
105 ieee80211_disable_keys(sdata);
107 /* tear down aggregation sessions and remove STAs */
108 mutex_lock(&local->sta_mtx);
109 list_for_each_entry(sta, &local->sta_list, list) {
111 enum ieee80211_sta_state state;
113 state = sta->sta_state;
114 for (; state > IEEE80211_STA_NOTEXIST; state--)
115 WARN_ON(drv_sta_state(local, sta->sdata, sta,
119 mesh_plink_quiesce(sta);
121 mutex_unlock(&local->sta_mtx);
123 /* remove all interfaces */
124 list_for_each_entry(sdata, &local->interfaces, list) {
125 static u8 zero_addr[ETH_ALEN] = {};
128 if (!ieee80211_sdata_running(sdata))
131 switch (sdata->vif.type) {
132 case NL80211_IFTYPE_AP_VLAN:
133 case NL80211_IFTYPE_MONITOR:
136 case NL80211_IFTYPE_STATION:
137 if (sdata->vif.bss_conf.assoc)
138 changed = BSS_CHANGED_ASSOC |
142 case NL80211_IFTYPE_AP:
143 case NL80211_IFTYPE_ADHOC:
144 case NL80211_IFTYPE_MESH_POINT:
145 if (sdata->vif.bss_conf.enable_beacon)
146 changed = BSS_CHANGED_BEACON_ENABLED;
152 ieee80211_quiesce(sdata);
154 sdata->suspend_bss_conf = sdata->vif.bss_conf;
155 memset(&sdata->vif.bss_conf, 0, sizeof(sdata->vif.bss_conf));
156 sdata->vif.bss_conf.idle = true;
157 if (sdata->suspend_bss_conf.bssid)
158 sdata->vif.bss_conf.bssid = zero_addr;
160 /* disable beaconing or remove association */
161 ieee80211_bss_info_change_notify(sdata, changed);
163 if (sdata->vif.type == NL80211_IFTYPE_AP &&
164 rcu_access_pointer(sdata->u.ap.beacon))
165 drv_stop_ap(local, sdata);
167 if (local->use_chanctx) {
168 struct ieee80211_chanctx_conf *conf;
170 mutex_lock(&local->chanctx_mtx);
171 conf = rcu_dereference_protected(
172 sdata->vif.chanctx_conf,
173 lockdep_is_held(&local->chanctx_mtx));
175 ctx = container_of(conf,
176 struct ieee80211_chanctx,
178 drv_unassign_vif_chanctx(local, sdata, ctx);
181 mutex_unlock(&local->chanctx_mtx);
183 drv_remove_interface(local, sdata);
186 sdata = rtnl_dereference(local->monitor_sdata);
188 if (local->use_chanctx) {
189 struct ieee80211_chanctx_conf *conf;
191 mutex_lock(&local->chanctx_mtx);
192 conf = rcu_dereference_protected(
193 sdata->vif.chanctx_conf,
194 lockdep_is_held(&local->chanctx_mtx));
196 ctx = container_of(conf,
197 struct ieee80211_chanctx,
199 drv_unassign_vif_chanctx(local, sdata, ctx);
202 mutex_unlock(&local->chanctx_mtx);
205 drv_remove_interface(local, sdata);
208 mutex_lock(&local->chanctx_mtx);
209 list_for_each_entry(ctx, &local->chanctx_list, list)
210 drv_remove_chanctx(local, ctx);
211 mutex_unlock(&local->chanctx_mtx);
213 /* stop hardware - this must stop RX */
214 if (local->open_count)
215 ieee80211_stop_device(local);
218 local->suspended = true;
219 /* need suspended to be visible before quiescing is false */
221 local->quiescing = false;
227 * __ieee80211_resume() is a static inline which just calls
228 * ieee80211_reconfig(), which is also needed for hardware
229 * hang/firmware failure/etc. recovery.