blob: 5c572e7a1a71dc76949b993f9f57e79223533f49 [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) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +020045 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
Johannes Bergca45de72011-04-21 13:38:00 +020046 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;
Pontus Fuchs3b08cf62012-05-31 12:34:47 +020080 local->wowlan = false;
Eyal Shapira9ea4fa12012-06-20 13:10:14 +030081 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);
86 }
87 mutex_unlock(&local->sta_mtx);
88 }
89 ieee80211_wake_queues_by_reason(hw,
90 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
Johannes Bergeecc4802011-05-04 15:37:29 +020091 return err;
Johannes Berg2b4562d2011-07-02 00:02:01 +020092 } else if (err > 0) {
93 WARN_ON(err != 1);
94 local->wowlan = false;
95 } else {
96 list_for_each_entry(sdata, &local->interfaces, list) {
97 cancel_work_sync(&sdata->work);
98 ieee80211_quiesce(sdata);
99 }
100 goto suspend;
Johannes Bergeecc4802011-05-04 15:37:29 +0200101 }
Johannes Bergeecc4802011-05-04 15:37:29 +0200102 }
103
Bob Copeland665af4f2009-01-19 11:20:53 -0500104 /* disable keys */
105 list_for_each_entry(sdata, &local->interfaces, list)
106 ieee80211_disable_keys(sdata);
107
Johannes Berg2a419052010-06-10 10:21:29 +0200108 /* tear down aggregation sessions and remove STAs */
109 mutex_lock(&local->sta_mtx);
110 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergf09603a2012-01-20 13:55:21 +0100111 if (sta->uploaded) {
112 enum ieee80211_sta_state state;
113
Johannes Bergf09603a2012-01-20 13:55:21 +0100114 state = sta->sta_state;
115 for (; state > IEEE80211_STA_NOTEXIST; state--)
Jakub Kicinski9d88c7f2012-02-23 02:17:48 +0100116 WARN_ON(drv_sta_state(local, sta->sdata, sta,
Johannes Bergf09603a2012-01-20 13:55:21 +0100117 state, state - 1));
118 }
119
Johannes Berg5bb644a2009-05-17 11:40:42 +0200120 mesh_plink_quiesce(sta);
Bob Copeland665af4f2009-01-19 11:20:53 -0500121 }
Johannes Berg34e89502010-02-03 13:59:58 +0100122 mutex_unlock(&local->sta_mtx);
Bob Copeland665af4f2009-01-19 11:20:53 -0500123
124 /* remove all interfaces */
125 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg64592c82010-06-10 10:21:31 +0200126 cancel_work_sync(&sdata->work);
127
Eliad Peller77572fd2011-06-16 11:49:33 +0300128 if (!ieee80211_quiesce(sdata))
Johannes Berg5bb644a2009-05-17 11:40:42 +0200129 continue;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200130
Johannes Berg9607e6b2009-12-23 13:15:31 +0100131 if (!ieee80211_sdata_running(sdata))
Johannes Berg5bb644a2009-05-17 11:40:42 +0200132 continue;
133
Bob Copeland97af7432009-07-29 10:13:03 +0200134 /* disable beaconing */
135 ieee80211_bss_info_change_notify(sdata,
136 BSS_CHANGED_BEACON_ENABLED);
137
Johannes Berg7b7eab62011-11-03 14:41:13 +0100138 drv_remove_interface(local, sdata);
Bob Copeland665af4f2009-01-19 11:20:53 -0500139 }
140
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200141 sdata = rtnl_dereference(local->monitor_sdata);
142 if (sdata)
143 drv_remove_interface(local, sdata);
144
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200145 /* stop hardware - this must stop RX */
Johannes Berg84f6a012009-08-20 20:02:20 +0200146 if (local->open_count)
147 ieee80211_stop_device(local);
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200148
Johannes Bergeecc4802011-05-04 15:37:29 +0200149 suspend:
Johannes Berg5bb644a2009-05-17 11:40:42 +0200150 local->suspended = true;
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200151 /* need suspended to be visible before quiescing is false */
152 barrier();
Johannes Berg5bb644a2009-05-17 11:40:42 +0200153 local->quiescing = false;
Bob Copelande874e652009-01-24 13:21:14 -0500154
Bob Copeland665af4f2009-01-19 11:20:53 -0500155 return 0;
156}
157
Johannes Bergf2753dd2009-04-14 10:09:24 +0200158/*
159 * __ieee80211_resume() is a static inline which just calls
160 * ieee80211_reconfig(), which is also needed for hardware
161 * hang/firmware failure/etc. recovery.
162 */