47f818959ad7a556ee24d6380fc6da440f6fc830
[linux-2.6.git] / net / mac80211 / pm.c
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)
10 {
11         struct ieee80211_local *local = hw_to_local(hw);
12         struct ieee80211_sub_if_data *sdata;
13         struct sta_info *sta;
14         unsigned long flags;
15
16         ieee80211_scan_cancel(local);
17
18         ieee80211_stop_queues_by_reason(hw,
19                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
20
21         /* flush out all packets */
22         synchronize_net();
23
24         local->quiescing = true;
25         /* make quiescing visible to timers everywhere */
26         mb();
27
28         flush_workqueue(local->workqueue);
29
30         /* Don't try to run timers while suspended. */
31         del_timer_sync(&local->sta_cleanup);
32
33          /*
34          * Note that this particular timer doesn't need to be
35          * restarted at resume.
36          */
37         cancel_work_sync(&local->dynamic_ps_enable_work);
38         del_timer_sync(&local->dynamic_ps_timer);
39
40         /* disable keys */
41         list_for_each_entry(sdata, &local->interfaces, list)
42                 ieee80211_disable_keys(sdata);
43
44         /* Tear down aggregation sessions */
45
46         rcu_read_lock();
47
48         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
49                 list_for_each_entry_rcu(sta, &local->sta_list, list) {
50                         set_sta_flags(sta, WLAN_STA_SUSPEND);
51                         ieee80211_sta_tear_down_BA_sessions(sta);
52                 }
53         }
54
55         rcu_read_unlock();
56
57         /* remove STAs */
58         spin_lock_irqsave(&local->sta_lock, flags);
59         list_for_each_entry(sta, &local->sta_list, list) {
60                 if (local->ops->sta_notify) {
61                         sdata = sta->sdata;
62                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
63                                 sdata = container_of(sdata->bss,
64                                              struct ieee80211_sub_if_data,
65                                              u.ap);
66
67                         drv_sta_notify(local, sdata, STA_NOTIFY_REMOVE,
68                                        &sta->sta);
69                 }
70
71                 mesh_plink_quiesce(sta);
72         }
73         spin_unlock_irqrestore(&local->sta_lock, flags);
74
75         /* remove all interfaces */
76         list_for_each_entry(sdata, &local->interfaces, list) {
77                 switch(sdata->vif.type) {
78                 case NL80211_IFTYPE_STATION:
79                         ieee80211_sta_quiesce(sdata);
80                         break;
81                 case NL80211_IFTYPE_ADHOC:
82                         ieee80211_ibss_quiesce(sdata);
83                         break;
84                 case NL80211_IFTYPE_MESH_POINT:
85                         ieee80211_mesh_quiesce(sdata);
86                         break;
87                 case NL80211_IFTYPE_AP_VLAN:
88                 case NL80211_IFTYPE_MONITOR:
89                         /* don't tell driver about this */
90                         continue;
91                 default:
92                         break;
93                 }
94
95                 if (!ieee80211_sdata_running(sdata))
96                         continue;
97
98                 /* disable beaconing */
99                 ieee80211_bss_info_change_notify(sdata,
100                         BSS_CHANGED_BEACON_ENABLED);
101
102                 drv_remove_interface(local, &sdata->vif);
103         }
104
105         /* stop hardware - this must stop RX */
106         if (local->open_count)
107                 ieee80211_stop_device(local);
108
109         local->suspended = true;
110         /* need suspended to be visible before quiescing is false */
111         barrier();
112         local->quiescing = false;
113
114         return 0;
115 }
116
117 /*
118  * __ieee80211_resume() is a static inline which just calls
119  * ieee80211_reconfig(), which is also needed for hardware
120  * hang/firmware failure/etc. recovery.
121  */