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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Portions
4 * Copyright (C) 2020-2021 Intel Corporation
5 */
6#include <net/mac80211.h>
7#include <net/rtnetlink.h>
8
9#include "ieee80211_i.h"
10#include "mesh.h"
11#include "driver-ops.h"
12#include "led.h"
13
14static void ieee80211_sched_scan_cancel(struct ieee80211_local *local)
15{
16 if (ieee80211_request_sched_scan_stop(local))
17 return;
18 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
19}
20
21int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
22{
23 struct ieee80211_local *local = hw_to_local(hw);
24 struct ieee80211_sub_if_data *sdata;
25 struct sta_info *sta;
26
27 if (!local->open_count)
28 goto suspend;
29
30 ieee80211_scan_cancel(local);
31
32 ieee80211_dfs_cac_cancel(local);
33
34 ieee80211_roc_purge(local, NULL);
35
36 ieee80211_del_virtual_monitor(local);
37
38 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) &&
39 !(wowlan && wowlan->any)) {
40 mutex_lock(&local->sta_mtx);
41 list_for_each_entry(sta, &local->sta_list, list) {
42 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
43 ieee80211_sta_tear_down_BA_sessions(
44 sta, AGG_STOP_LOCAL_REQUEST);
45 }
46 mutex_unlock(&local->sta_mtx);
47 }
48
49 /* keep sched_scan only in case of 'any' trigger */
50 if (!(wowlan && wowlan->any))
51 ieee80211_sched_scan_cancel(local);
52
53 ieee80211_stop_queues_by_reason(hw,
54 IEEE80211_MAX_QUEUE_MAP,
55 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
56 false);
57
58 /* flush out all packets */
59 synchronize_net();
60
61 ieee80211_flush_queues(local, NULL, true);
62
63 local->quiescing = true;
64 /* make quiescing visible to timers everywhere */
65 mb();
66
67 flush_workqueue(local->workqueue);
68
69 /* Don't try to run timers while suspended. */
70 del_timer_sync(&local->sta_cleanup);
71
72 /*
73 * Note that this particular timer doesn't need to be
74 * restarted at resume.
75 */
76 cancel_work_sync(&local->dynamic_ps_enable_work);
77 del_timer_sync(&local->dynamic_ps_timer);
78
79 local->wowlan = wowlan;
80 if (local->wowlan) {
81 int err;
82
83 /* Drivers don't expect to suspend while some operations like
84 * authenticating or associating are in progress. It doesn't
85 * make sense anyway to accept that, since the authentication
86 * or association would never finish since the driver can't do
87 * that on its own.
88 * Thus, clean up in-progress auth/assoc first.
89 */
90 list_for_each_entry(sdata, &local->interfaces, list) {
91 if (!ieee80211_sdata_running(sdata))
92 continue;
93 if (sdata->vif.type != NL80211_IFTYPE_STATION)
94 continue;
95 ieee80211_mgd_quiesce(sdata);
96 /* If suspended during TX in progress, and wowlan
97 * is enabled (connection will be active) there
98 * can be a race where the driver is put out
99 * of power-save due to TX and during suspend
100 * dynamic_ps_timer is cancelled and TX packet
101 * is flushed, leaving the driver in ACTIVE even
102 * after resuming until dynamic_ps_timer puts
103 * driver back in DOZE.
104 */
105 if (sdata->u.mgd.associated &&
106 sdata->u.mgd.powersave &&
107 !(local->hw.conf.flags & IEEE80211_CONF_PS)) {
108 local->hw.conf.flags |= IEEE80211_CONF_PS;
109 ieee80211_hw_config(local,
110 IEEE80211_CONF_CHANGE_PS);
111 }
112 }
113
114 err = drv_suspend(local, wowlan);
115 if (err < 0) {
116 local->quiescing = false;
117 local->wowlan = false;
118 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
119 mutex_lock(&local->sta_mtx);
120 list_for_each_entry(sta,
121 &local->sta_list, list) {
122 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
123 }
124 mutex_unlock(&local->sta_mtx);
125 }
126 ieee80211_wake_queues_by_reason(hw,
127 IEEE80211_MAX_QUEUE_MAP,
128 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
129 false);
130 return err;
131 } else if (err > 0) {
132 WARN_ON(err != 1);
133 /* cfg80211 will call back into mac80211 to disconnect
134 * all interfaces, allow that to proceed properly
135 */
136 ieee80211_wake_queues_by_reason(hw,
137 IEEE80211_MAX_QUEUE_MAP,
138 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
139 false);
140 return err;
141 } else {
142 goto suspend;
143 }
144 }
145
146 /* remove all interfaces that were created in the driver */
147 list_for_each_entry(sdata, &local->interfaces, list) {
148 if (!ieee80211_sdata_running(sdata))
149 continue;
150 switch (sdata->vif.type) {
151 case NL80211_IFTYPE_AP_VLAN:
152 case NL80211_IFTYPE_MONITOR:
153 continue;
154 case NL80211_IFTYPE_STATION:
155 ieee80211_mgd_quiesce(sdata);
156 break;
157 default:
158 break;
159 }
160
161 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
162 drv_remove_interface(local, sdata);
163 }
164
165 /*
166 * We disconnected on all interfaces before suspend, all channel
167 * contexts should be released.
168 */
169 WARN_ON(!list_empty(&local->chanctx_list));
170
171 /* stop hardware - this must stop RX */
172 ieee80211_stop_device(local);
173
174 suspend:
175 local->suspended = true;
176 /* need suspended to be visible before quiescing is false */
177 barrier();
178 local->quiescing = false;
179
180 return 0;
181}
182
183/*
184 * __ieee80211_resume() is a static inline which just calls
185 * ieee80211_reconfig(), which is also needed for hardware
186 * hang/firmware failure/etc. recovery.
187 */
188
189void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
190 struct cfg80211_wowlan_wakeup *wakeup,
191 gfp_t gfp)
192{
193 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
194
195 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
196}
197EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Portions
4 * Copyright (C) 2020-2021, 2023 Intel Corporation
5 */
6#include <net/mac80211.h>
7#include <net/rtnetlink.h>
8
9#include "ieee80211_i.h"
10#include "mesh.h"
11#include "driver-ops.h"
12#include "led.h"
13
14static void ieee80211_sched_scan_cancel(struct ieee80211_local *local)
15{
16 if (ieee80211_request_sched_scan_stop(local))
17 return;
18 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
19}
20
21int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
22{
23 struct ieee80211_local *local = hw_to_local(hw);
24 struct ieee80211_sub_if_data *sdata;
25 struct sta_info *sta;
26
27 if (!local->open_count)
28 goto suspend;
29
30 local->suspending = true;
31 mb(); /* make suspending visible before any cancellation */
32
33 ieee80211_scan_cancel(local);
34
35 ieee80211_dfs_cac_cancel(local);
36
37 ieee80211_roc_purge(local, NULL);
38
39 ieee80211_del_virtual_monitor(local);
40
41 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) &&
42 !(wowlan && wowlan->any)) {
43 lockdep_assert_wiphy(local->hw.wiphy);
44 list_for_each_entry(sta, &local->sta_list, list) {
45 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
46 ieee80211_sta_tear_down_BA_sessions(
47 sta, AGG_STOP_LOCAL_REQUEST);
48 }
49 }
50
51 /* keep sched_scan only in case of 'any' trigger */
52 if (!(wowlan && wowlan->any))
53 ieee80211_sched_scan_cancel(local);
54
55 ieee80211_stop_queues_by_reason(hw,
56 IEEE80211_MAX_QUEUE_MAP,
57 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
58 false);
59
60 /* flush out all packets */
61 synchronize_net();
62
63 ieee80211_flush_queues(local, NULL, true);
64
65 local->quiescing = true;
66 /* make quiescing visible to timers everywhere */
67 mb();
68
69 flush_workqueue(local->workqueue);
70
71 /* Don't try to run timers while suspended. */
72 del_timer_sync(&local->sta_cleanup);
73
74 /*
75 * Note that this particular timer doesn't need to be
76 * restarted at resume.
77 */
78 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
79 del_timer_sync(&local->dynamic_ps_timer);
80
81 local->wowlan = wowlan;
82 if (local->wowlan) {
83 int err;
84
85 /* Drivers don't expect to suspend while some operations like
86 * authenticating or associating are in progress. It doesn't
87 * make sense anyway to accept that, since the authentication
88 * or association would never finish since the driver can't do
89 * that on its own.
90 * Thus, clean up in-progress auth/assoc first.
91 */
92 list_for_each_entry(sdata, &local->interfaces, list) {
93 if (!ieee80211_sdata_running(sdata))
94 continue;
95 if (sdata->vif.type != NL80211_IFTYPE_STATION)
96 continue;
97 ieee80211_mgd_quiesce(sdata);
98 /* If suspended during TX in progress, and wowlan
99 * is enabled (connection will be active) there
100 * can be a race where the driver is put out
101 * of power-save due to TX and during suspend
102 * dynamic_ps_timer is cancelled and TX packet
103 * is flushed, leaving the driver in ACTIVE even
104 * after resuming until dynamic_ps_timer puts
105 * driver back in DOZE.
106 */
107 if (sdata->u.mgd.associated &&
108 sdata->u.mgd.powersave &&
109 !(local->hw.conf.flags & IEEE80211_CONF_PS)) {
110 local->hw.conf.flags |= IEEE80211_CONF_PS;
111 ieee80211_hw_config(local,
112 IEEE80211_CONF_CHANGE_PS);
113 }
114 }
115
116 err = drv_suspend(local, wowlan);
117 if (err < 0) {
118 local->quiescing = false;
119 local->wowlan = false;
120 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
121 lockdep_assert_wiphy(local->hw.wiphy);
122 list_for_each_entry(sta,
123 &local->sta_list, list) {
124 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
125 }
126 }
127 ieee80211_wake_queues_by_reason(hw,
128 IEEE80211_MAX_QUEUE_MAP,
129 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
130 false);
131 return err;
132 } else if (err > 0) {
133 WARN_ON(err != 1);
134 /* cfg80211 will call back into mac80211 to disconnect
135 * all interfaces, allow that to proceed properly
136 */
137 ieee80211_wake_queues_by_reason(hw,
138 IEEE80211_MAX_QUEUE_MAP,
139 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
140 false);
141 return err;
142 } else {
143 goto suspend;
144 }
145 }
146
147 /* remove all interfaces that were created in the driver */
148 list_for_each_entry(sdata, &local->interfaces, list) {
149 if (!ieee80211_sdata_running(sdata))
150 continue;
151 switch (sdata->vif.type) {
152 case NL80211_IFTYPE_AP_VLAN:
153 case NL80211_IFTYPE_MONITOR:
154 continue;
155 case NL80211_IFTYPE_STATION:
156 ieee80211_mgd_quiesce(sdata);
157 break;
158 default:
159 break;
160 }
161
162 wiphy_delayed_work_flush(local->hw.wiphy,
163 &sdata->dec_tailroom_needed_wk);
164 drv_remove_interface(local, sdata);
165 }
166
167 /*
168 * We disconnected on all interfaces before suspend, all channel
169 * contexts should be released.
170 */
171 WARN_ON(!list_empty(&local->chanctx_list));
172
173 /* stop hardware - this must stop RX */
174 ieee80211_stop_device(local);
175
176 suspend:
177 local->suspended = true;
178 /* need suspended to be visible before quiescing is false */
179 barrier();
180 local->quiescing = false;
181 local->suspending = false;
182
183 return 0;
184}
185
186/*
187 * __ieee80211_resume() is a static inline which just calls
188 * ieee80211_reconfig(), which is also needed for hardware
189 * hang/firmware failure/etc. recovery.
190 */
191
192void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
193 struct cfg80211_wowlan_wakeup *wakeup,
194 gfp_t gfp)
195{
196 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
197
198 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
199}
200EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);