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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
9static 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
16int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
17{
18 struct ieee80211_local *local = hw_to_local(hw);
19 struct ieee80211_sub_if_data *sdata;
20 struct sta_info *sta;
21
22 if (!local->open_count)
23 goto suspend;
24
25 ieee80211_scan_cancel(local);
26
27 ieee80211_dfs_cac_cancel(local);
28
29 ieee80211_roc_purge(local, NULL);
30
31 ieee80211_del_virtual_monitor(local);
32
33 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) &&
34 !(wowlan && wowlan->any)) {
35 mutex_lock(&local->sta_mtx);
36 list_for_each_entry(sta, &local->sta_list, list) {
37 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
38 ieee80211_sta_tear_down_BA_sessions(
39 sta, AGG_STOP_LOCAL_REQUEST);
40 }
41 mutex_unlock(&local->sta_mtx);
42 }
43
44 /* keep sched_scan only in case of 'any' trigger */
45 if (!(wowlan && wowlan->any))
46 ieee80211_sched_scan_cancel(local);
47
48 ieee80211_stop_queues_by_reason(hw,
49 IEEE80211_MAX_QUEUE_MAP,
50 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
51 false);
52
53 /* flush out all packets */
54 synchronize_net();
55
56 ieee80211_flush_queues(local, NULL, true);
57
58 local->quiescing = true;
59 /* make quiescing visible to timers everywhere */
60 mb();
61
62 flush_workqueue(local->workqueue);
63
64 /* 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
74 local->wowlan = wowlan;
75 if (local->wowlan) {
76 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);
91 /* 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 }
107 }
108
109 err = drv_suspend(local, wowlan);
110 if (err < 0) {
111 local->quiescing = false;
112 local->wowlan = false;
113 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
114 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,
122 IEEE80211_MAX_QUEUE_MAP,
123 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
124 false);
125 return err;
126 } else if (err > 0) {
127 WARN_ON(err != 1);
128 /* 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);
135 return err;
136 } else {
137 goto suspend;
138 }
139 }
140
141 /* remove all interfaces that were created in the driver */
142 list_for_each_entry(sdata, &local->interfaces, list) {
143 if (!ieee80211_sdata_running(sdata))
144 continue;
145 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;
152 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;
167 default:
168 break;
169 }
170
171 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
172 drv_remove_interface(local, sdata);
173 }
174
175 /*
176 * We disconnected on all interfaces before suspend, all channel
177 * contexts should be released.
178 */
179 WARN_ON(!list_empty(&local->chanctx_list));
180
181 /* stop hardware - this must stop RX */
182 ieee80211_stop_device(local);
183
184 suspend:
185 local->suspended = true;
186 /* need suspended to be visible before quiescing is false */
187 barrier();
188 local->quiescing = false;
189
190 return 0;
191}
192
193/*
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 */
198
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);
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/* 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
31int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
32{
33 struct ieee80211_local *local = hw_to_local(hw);
34 struct ieee80211_sub_if_data *sdata;
35 struct sta_info *sta;
36
37 if (!local->open_count)
38 goto suspend;
39
40 ieee80211_scan_cancel(local);
41
42 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
51 ieee80211_stop_queues_by_reason(hw,
52 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
53
54 /* flush out all packets */
55 synchronize_net();
56
57 drv_flush(local, false);
58
59 local->quiescing = true;
60 /* make quiescing visible to timers everywhere */
61 mb();
62
63 flush_workqueue(local->workqueue);
64
65 /* 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
75 local->wowlan = wowlan && local->open_count;
76 if (local->wowlan) {
77 int err = drv_suspend(local, wowlan);
78 if (err < 0) {
79 local->quiescing = false;
80 return err;
81 } 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;
90 }
91 }
92
93 /* disable keys */
94 list_for_each_entry(sdata, &local->interfaces, list)
95 ieee80211_disable_keys(sdata);
96
97 /* tear down aggregation sessions and remove STAs */
98 mutex_lock(&local->sta_mtx);
99 list_for_each_entry(sta, &local->sta_list, list) {
100 if (sta->uploaded) {
101 sdata = sta->sdata;
102 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
103 sdata = container_of(sdata->bss,
104 struct ieee80211_sub_if_data,
105 u.ap);
106
107 drv_sta_remove(local, sdata, &sta->sta);
108 }
109
110 mesh_plink_quiesce(sta);
111 }
112 mutex_unlock(&local->sta_mtx);
113
114 /* remove all interfaces */
115 list_for_each_entry(sdata, &local->interfaces, list) {
116 cancel_work_sync(&sdata->work);
117
118 if (!ieee80211_quiesce(sdata))
119 continue;
120
121 if (!ieee80211_sdata_running(sdata))
122 continue;
123
124 /* disable beaconing */
125 ieee80211_bss_info_change_notify(sdata,
126 BSS_CHANGED_BEACON_ENABLED);
127
128 drv_remove_interface(local, &sdata->vif);
129 }
130
131 /* stop hardware - this must stop RX */
132 if (local->open_count)
133 ieee80211_stop_device(local);
134
135 suspend:
136 local->suspended = true;
137 /* need suspended to be visible before quiescing is false */
138 barrier();
139 local->quiescing = false;
140
141 return 0;
142}
143
144/*
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 */