blob: 00a43a70e1fc30eedb09ab9dcdde8af2a9c89673 [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 Peller0d440ea2015-10-25 10:59:33 +02009static void ieee80211_sched_scan_cancel(struct ieee80211_local *local)
10{
11 if (ieee80211_request_sched_scan_stop(local))
12 return;
13 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
14}
15
Johannes Bergeecc4802011-05-04 15:37:29 +020016int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
Bob Copeland665af4f2009-01-19 11:20:53 -050017{
18 struct ieee80211_local *local = hw_to_local(hw);
19 struct ieee80211_sub_if_data *sdata;
Bob Copeland665af4f2009-01-19 11:20:53 -050020 struct sta_info *sta;
21
Johannes Berg94f9b972011-07-14 16:48:54 +020022 if (!local->open_count)
23 goto suspend;
24
Stanislaw Gruszka4136c422010-10-06 11:22:10 +020025 ieee80211_scan_cancel(local);
Johannes Berg5bb644a2009-05-17 11:40:42 +020026
Simon Wunderlich164eb022013-02-08 18:16:20 +010027 ieee80211_dfs_cac_cancel(local);
28
Johannes Bergc8f994e2013-03-27 22:49:19 +010029 ieee80211_roc_purge(local, NULL);
30
Johannes Berg3c3e21e2013-03-27 23:20:27 +010031 ieee80211_del_virtual_monitor(local);
32
Eliad Peller27392712015-09-21 15:50:26 +030033 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) &&
34 !(wowlan && wowlan->any)) {
Johannes Bergca45de72011-04-21 13:38:00 +020035 mutex_lock(&local->sta_mtx);
36 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +020037 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
Johannes Bergc82c4a82012-07-18 13:31:31 +020038 ieee80211_sta_tear_down_BA_sessions(
39 sta, AGG_STOP_LOCAL_REQUEST);
Johannes Bergca45de72011-04-21 13:38:00 +020040 }
41 mutex_unlock(&local->sta_mtx);
42 }
43
Eliad Peller0d440ea2015-10-25 10:59:33 +020044 /* keep sched_scan only in case of 'any' trigger */
45 if (!(wowlan && wowlan->any))
46 ieee80211_sched_scan_cancel(local);
47
Johannes Berg25420602009-03-13 11:43:36 +010048 ieee80211_stop_queues_by_reason(hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +010049 IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +030050 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
51 false);
Johannes Berg25420602009-03-13 11:43:36 +010052
Johannes Bergd34ba212013-12-04 22:46:11 +010053 /* flush out all packets */
Bob Copeland8ceb5952013-04-18 18:26:49 -040054 synchronize_net();
Johannes Berg5bb644a2009-05-17 11:40:42 +020055
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +020056 ieee80211_flush_queues(local, NULL, true);
Johannes Bergca45de72011-04-21 13:38:00 +020057
Johannes Berg5bb644a2009-05-17 11:40:42 +020058 local->quiescing = true;
59 /* make quiescing visible to timers everywhere */
60 mb();
61
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -040062 flush_workqueue(local->workqueue);
Bob Copeland665af4f2009-01-19 11:20:53 -050063
Johannes Berg5bb644a2009-05-17 11:40:42 +020064 /* Don't try to run timers while suspended. */
65 del_timer_sync(&local->sta_cleanup);
66
67 /*
68 * Note that this particular timer doesn't need to be
69 * restarted at resume.
70 */
71 cancel_work_sync(&local->dynamic_ps_enable_work);
72 del_timer_sync(&local->dynamic_ps_timer);
73
Luciano Coelho8bb6f4b2015-03-01 09:10:07 +020074 local->wowlan = wowlan;
Johannes Bergeecc4802011-05-04 15:37:29 +020075 if (local->wowlan) {
Johannes Bergef7c6722015-03-01 09:10:06 +020076 int err;
77
78 /* Drivers don't expect to suspend while some operations like
79 * authenticating or associating are in progress. It doesn't
80 * make sense anyway to accept that, since the authentication
81 * or association would never finish since the driver can't do
82 * that on its own.
83 * Thus, clean up in-progress auth/assoc first.
84 */
85 list_for_each_entry(sdata, &local->interfaces, list) {
86 if (!ieee80211_sdata_running(sdata))
87 continue;
88 if (sdata->vif.type != NL80211_IFTYPE_STATION)
89 continue;
90 ieee80211_mgd_quiesce(sdata);
Chaitanya T K541b6ed2015-06-10 19:12:31 +053091 /* If suspended during TX in progress, and wowlan
92 * is enabled (connection will be active) there
93 * can be a race where the driver is put out
94 * of power-save due to TX and during suspend
95 * dynamic_ps_timer is cancelled and TX packet
96 * is flushed, leaving the driver in ACTIVE even
97 * after resuming until dynamic_ps_timer puts
98 * driver back in DOZE.
99 */
100 if (sdata->u.mgd.associated &&
101 sdata->u.mgd.powersave &&
102 !(local->hw.conf.flags & IEEE80211_CONF_PS)) {
103 local->hw.conf.flags |= IEEE80211_CONF_PS;
104 ieee80211_hw_config(local,
105 IEEE80211_CONF_CHANGE_PS);
106 }
Johannes Bergef7c6722015-03-01 09:10:06 +0200107 }
108
109 err = drv_suspend(local, wowlan);
Johannes Berg2b4562d2011-07-02 00:02:01 +0200110 if (err < 0) {
Johannes Bergeecc4802011-05-04 15:37:29 +0200111 local->quiescing = false;
Pontus Fuchs3b08cf62012-05-31 12:34:47 +0200112 local->wowlan = false;
Johannes Berg30686bf2015-06-02 21:39:54 +0200113 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
Eyal Shapira9ea4fa12012-06-20 13:10:14 +0300114 mutex_lock(&local->sta_mtx);
115 list_for_each_entry(sta,
116 &local->sta_list, list) {
117 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
118 }
119 mutex_unlock(&local->sta_mtx);
120 }
121 ieee80211_wake_queues_by_reason(hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100122 IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300123 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
124 false);
Johannes Bergeecc4802011-05-04 15:37:29 +0200125 return err;
Johannes Berg2b4562d2011-07-02 00:02:01 +0200126 } else if (err > 0) {
127 WARN_ON(err != 1);
Johannes Berg23e37092015-03-01 09:10:08 +0200128 /* cfg80211 will call back into mac80211 to disconnect
129 * all interfaces, allow that to proceed properly
130 */
131 ieee80211_wake_queues_by_reason(hw,
132 IEEE80211_MAX_QUEUE_MAP,
133 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
134 false);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100135 return err;
Johannes Berg2b4562d2011-07-02 00:02:01 +0200136 } else {
Johannes Berg2b4562d2011-07-02 00:02:01 +0200137 goto suspend;
Johannes Bergeecc4802011-05-04 15:37:29 +0200138 }
Johannes Bergeecc4802011-05-04 15:37:29 +0200139 }
140
Stanislaw Gruszkacd34f642013-07-23 13:56:50 +0200141 /* remove all interfaces that were created in the driver */
Bob Copeland665af4f2009-01-19 11:20:53 -0500142 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg1a1cb742014-03-19 09:55:55 +0100143 if (!ieee80211_sdata_running(sdata))
Johannes Berg5bb644a2009-05-17 11:40:42 +0200144 continue;
Johannes Berg1a1cb742014-03-19 09:55:55 +0100145 switch (sdata->vif.type) {
146 case NL80211_IFTYPE_AP_VLAN:
147 case NL80211_IFTYPE_MONITOR:
148 continue;
149 case NL80211_IFTYPE_STATION:
150 ieee80211_mgd_quiesce(sdata);
151 break;
Luciano Coelho2af81d62015-01-21 22:19:34 +0200152 case NL80211_IFTYPE_WDS:
153 /* tear down aggregation sessions and remove STAs */
154 mutex_lock(&local->sta_mtx);
155 sta = sdata->u.wds.sta;
156 if (sta && sta->uploaded) {
157 enum ieee80211_sta_state state;
158
159 state = sta->sta_state;
160 for (; state > IEEE80211_STA_NOTEXIST; state--)
161 WARN_ON(drv_sta_state(local, sta->sdata,
162 sta, state,
163 state - 1));
164 }
165 mutex_unlock(&local->sta_mtx);
166 break;
Johannes Berg1a1cb742014-03-19 09:55:55 +0100167 default:
168 break;
169 }
Stanislaw Gruszkacd34f642013-07-23 13:56:50 +0200170
Johannes Berg7b7eab62011-11-03 14:41:13 +0100171 drv_remove_interface(local, sdata);
Bob Copeland665af4f2009-01-19 11:20:53 -0500172 }
173
Stanislaw Gruszka12e7f512013-02-28 10:55:26 +0100174 /*
175 * We disconnected on all interfaces before suspend, all channel
176 * contexts should be released.
177 */
178 WARN_ON(!list_empty(&local->chanctx_list));
Johannes Berg4b6f1dd2012-04-03 14:35:57 +0200179
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200180 /* stop hardware - this must stop RX */
Johannes Berg84f6a012009-08-20 20:02:20 +0200181 if (local->open_count)
182 ieee80211_stop_device(local);
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200183
Johannes Bergeecc4802011-05-04 15:37:29 +0200184 suspend:
Johannes Berg5bb644a2009-05-17 11:40:42 +0200185 local->suspended = true;
Johannes Berg89c3a8a2009-07-28 18:10:17 +0200186 /* need suspended to be visible before quiescing is false */
187 barrier();
Johannes Berg5bb644a2009-05-17 11:40:42 +0200188 local->quiescing = false;
Bob Copelande874e652009-01-24 13:21:14 -0500189
Bob Copeland665af4f2009-01-19 11:20:53 -0500190 return 0;
191}
192
Johannes Bergf2753dd2009-04-14 10:09:24 +0200193/*
194 * __ieee80211_resume() is a static inline which just calls
195 * ieee80211_reconfig(), which is also needed for hardware
196 * hang/firmware failure/etc. recovery.
197 */
Johannes Bergcd8f7cb2013-01-22 12:34:29 +0100198
199void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
200 struct cfg80211_wowlan_wakeup *wakeup,
201 gfp_t gfp)
202{
203 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
204
205 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
206}
207EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);