blob: 6326d3439861e7448dec7a2f1cb08dee8d10988e [file] [log] [blame]
Bob Copeland665af4f2009-01-19 11:20:53 -05001#include <net/mac80211.h>
2#include <net/rtnetlink.h>
3
4#include "ieee80211_i.h"
Johannes Berg5bb644a2009-05-17 11:40:42 +02005#include "mesh.h"
Johannes Berg24487982009-04-23 18:52:52 +02006#include "driver-ops.h"
Bob Copeland665af4f2009-01-19 11:20:53 -05007#include "led.h"
8
Eliad Peller77572fd2011-06-16 11:49:33 +03009/* return value indicates whether the driver should be further notified */
10static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
11{
12 switch (sdata->vif.type) {
13 case NL80211_IFTYPE_STATION:
14 ieee80211_sta_quiesce(sdata);
15 return true;
16 case NL80211_IFTYPE_ADHOC:
17 ieee80211_ibss_quiesce(sdata);
18 return true;
19 case NL80211_IFTYPE_MESH_POINT:
20 ieee80211_mesh_quiesce(sdata);
21 return true;
22 case NL80211_IFTYPE_AP_VLAN:
23 case NL80211_IFTYPE_MONITOR:
24 /* don't tell driver about this */
25 return false;
26 default:
27 return true;
28 }
29}
30
Johannes Bergeecc4802011-05-04 15:37:29 +020031int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
Bob Copeland665af4f2009-01-19 11:20:53 -050032{
33 struct ieee80211_local *local = hw_to_local(hw);
34 struct ieee80211_sub_if_data *sdata;
Bob Copeland665af4f2009-01-19 11:20:53 -050035 struct sta_info *sta;
36
Johannes Berg94f9b972011-07-14 16:48:54 +020037 if (!local->open_count)
38 goto suspend;
39
Stanislaw Gruszka4136c422010-10-06 11:22:10 +020040 ieee80211_scan_cancel(local);
Johannes Berg5bb644a2009-05-17 11:40:42 +020041
Johannes Bergca45de72011-04-21 13:38:00 +020042 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
43 mutex_lock(&local->sta_mtx);
44 list_for_each_entry(sta, &local->sta_list, list) {
45 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
46 ieee80211_sta_tear_down_BA_sessions(sta, true);
47 }
48 mutex_unlock(&local->sta_mtx);
49 }
50
Johannes Berg25420602009-03-13 11:43:36 +010051 ieee80211_stop_queues_by_reason(hw,
52 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
53
Johannes Berg5bb644a2009-05-17 11:40:42 +020054 /* flush out all packets */
55 synchronize_net();
56
Johannes Bergca45de72011-04-21 13:38:00 +020057 drv_flush(local, false);
58
Johannes Berg5bb644a2009-05-17 11:40:42 +020059 local->quiescing = true;
60 /* make quiescing visible to timers everywhere */
61 mb();
62
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -040063 flush_workqueue(local->workqueue);
Bob Copeland665af4f2009-01-19 11:20:53 -050064
Johannes Berg5bb644a2009-05-17 11:40:42 +020065 /* Don't try to run timers while suspended. */
66 del_timer_sync(&local->sta_cleanup);
67
68 /*
69 * Note that this particular timer doesn't need to be
70 * restarted at resume.
71 */
72 cancel_work_sync(&local->dynamic_ps_enable_work);
73 del_timer_sync(&local->dynamic_ps_timer);
74
Johannes Bergeecc4802011-05-04 15:37:29 +020075 local->wowlan = wowlan && local->open_count;
76 if (local->wowlan) {
77 int err = drv_suspend(local, wowlan);
Johannes Berg2b4562d2011-07-02 00:02:01 +020078 if (err < 0) {
Johannes Bergeecc4802011-05-04 15:37:29 +020079 local->quiescing = false;
80 return err;
Johannes Berg2b4562d2011-07-02 00:02:01 +020081 } else if (err > 0) {
82 WARN_ON(err != 1);
83 local->wowlan = false;
84 } else {
85 list_for_each_entry(sdata, &local->interfaces, list) {
86 cancel_work_sync(&sdata->work);
87 ieee80211_quiesce(sdata);
88 }
89 goto suspend;
Johannes Bergeecc4802011-05-04 15:37:29 +020090 }
Johannes Bergeecc4802011-05-04 15:37:29 +020091 }
92
Bob Copeland665af4f2009-01-19 11:20:53 -050093 /* disable keys */
94 list_for_each_entry(sdata, &local->interfaces, list)
95 ieee80211_disable_keys(sdata);
96
Johannes Berg2a419052010-06-10 10:21:29 +020097 /* tear down aggregation sessions and remove STAs */
98 mutex_lock(&local->sta_mtx);
99 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg34e89502010-02-03 13:59:58 +0100100 if (sta->uploaded) {
Johannes Berg5bb644a2009-05-17 11:40:42 +0200101 sdata = sta->sdata;
Bob Copeland665af4f2009-01-19 11:20:53 -0500102 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
103 sdata = container_of(sdata->bss,
104 struct ieee80211_sub_if_data,
105 u.ap);
106
Johannes Berg34e89502010-02-03 13:59:58 +0100107 drv_sta_remove(local, sdata, &sta->sta);
Bob Copeland665af4f2009-01-19 11:20:53 -0500108 }
Johannes Berg5bb644a2009-05-17 11:40:42 +0200109
110 mesh_plink_quiesce(sta);
Bob Copeland665af4f2009-01-19 11:20:53 -0500111 }
Johannes Berg34e89502010-02-03 13:59:58 +0100112 mutex_unlock(&local->sta_mtx);
Bob Copeland665af4f2009-01-19 11:20:53 -0500113
114 /* remove all interfaces */
115 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg64592c82010-06-10 10:21:31 +0200116 cancel_work_sync(&sdata->work);
117
Eliad Peller77572fd2011-06-16 11:49:33 +0300118 if (!ieee80211_quiesce(sdata))
Johannes Berg5bb644a2009-05-17 11:40:42 +0200119 continue;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200120
Johannes Berg9607e6b2009-12-23 13:15:31 +0100121 if (!ieee80211_sdata_running(sdata))
Johannes Berg5bb644a2009-05-17 11:40:42 +0200122 continue;
123
Bob Copeland97af7432009-07-29 10:13:03 +0200124 /* disable beaconing */
125 ieee80211_bss_info_change_notify(sdata,
126 BSS_CHANGED_BEACON_ENABLED);
127
Johannes Berg1ed32e42009-12-23 13:15:45 +0100128 drv_remove_interface(local, &sdata->vif);
Bob Copeland665af4f2009-01-19 11:20:53 -0500129 }
130
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200131 /* stop hardware - this must stop RX */
Johannes Berg84f6a012009-08-20 20:02:20 +0200132 if (local->open_count)
133 ieee80211_stop_device(local);
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200134
Johannes Bergeecc4802011-05-04 15:37:29 +0200135 suspend:
Johannes Berg5bb644a2009-05-17 11:40:42 +0200136 local->suspended = true;
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200137 /* need suspended to be visible before quiescing is false */
138 barrier();
Johannes Berg5bb644a2009-05-17 11:40:42 +0200139 local->quiescing = false;
Bob Copelande874e652009-01-24 13:21:14 -0500140
Bob Copeland665af4f2009-01-19 11:20:53 -0500141 return 0;
142}
143
Johannes Bergf2753dd2009-04-14 10:09:24 +0200144/*
145 * __ieee80211_resume() is a static inline which just calls
146 * ieee80211_reconfig(), which is also needed for hardware
147 * hang/firmware failure/etc. recovery.
148 */