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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Portions
4 * Copyright (C) 2020-2021, 2023-2024 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 bool reset)
23{
24 struct ieee80211_local *local = hw_to_local(hw);
25 struct ieee80211_sub_if_data *sdata;
26 struct sta_info *sta;
27
28 if (!local->open_count)
29 goto suspend;
30
31 local->suspending = true;
32 mb(); /* make suspending visible before any cancellation */
33
34 ieee80211_scan_cancel(local);
35
36 ieee80211_dfs_cac_cancel(local, NULL);
37
38 ieee80211_roc_purge(local, NULL);
39
40 ieee80211_del_virtual_monitor(local);
41
42 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) &&
43 !(wowlan && wowlan->any)) {
44 lockdep_assert_wiphy(local->hw.wiphy);
45 list_for_each_entry(sta, &local->sta_list, list) {
46 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
47 ieee80211_sta_tear_down_BA_sessions(
48 sta, AGG_STOP_LOCAL_REQUEST);
49 }
50 }
51
52 /* keep sched_scan only in case of 'any' trigger */
53 if (!(wowlan && wowlan->any))
54 ieee80211_sched_scan_cancel(local);
55
56 ieee80211_stop_queues_by_reason(hw,
57 IEEE80211_MAX_QUEUE_MAP,
58 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
59 false);
60
61 /* flush out all packets */
62 synchronize_net();
63
64 ieee80211_flush_queues(local, NULL, true);
65
66 local->quiescing = true;
67 /* make quiescing visible to timers everywhere */
68 mb();
69
70 flush_workqueue(local->workqueue);
71
72 /* Don't try to run timers while suspended. */
73 timer_delete_sync(&local->sta_cleanup);
74
75 /*
76 * Note that this particular timer doesn't need to be
77 * restarted at resume.
78 */
79 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
80 timer_delete_sync(&local->dynamic_ps_timer);
81
82 local->wowlan = wowlan;
83 if (local->wowlan) {
84 int err;
85
86 /* Drivers don't expect to suspend while some operations like
87 * authenticating or associating are in progress. It doesn't
88 * make sense anyway to accept that, since the authentication
89 * or association would never finish since the driver can't do
90 * that on its own.
91 * Thus, clean up in-progress auth/assoc first.
92 */
93 list_for_each_entry(sdata, &local->interfaces, list) {
94 if (!ieee80211_sdata_running(sdata))
95 continue;
96 if (sdata->vif.type != NL80211_IFTYPE_STATION)
97 continue;
98 ieee80211_mgd_quiesce(sdata);
99 /* If suspended during TX in progress, and wowlan
100 * is enabled (connection will be active) there
101 * can be a race where the driver is put out
102 * of power-save due to TX and during suspend
103 * dynamic_ps_timer is cancelled and TX packet
104 * is flushed, leaving the driver in ACTIVE even
105 * after resuming until dynamic_ps_timer puts
106 * driver back in DOZE.
107 */
108 if (sdata->u.mgd.associated &&
109 sdata->u.mgd.powersave &&
110 !(local->hw.conf.flags & IEEE80211_CONF_PS)) {
111 local->hw.conf.flags |= IEEE80211_CONF_PS;
112 ieee80211_hw_config(local, -1,
113 IEEE80211_CONF_CHANGE_PS);
114 }
115 }
116
117 err = drv_suspend(local, wowlan);
118 if (err < 0) {
119 local->quiescing = false;
120 local->wowlan = false;
121 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
122 lockdep_assert_wiphy(local->hw.wiphy);
123 list_for_each_entry(sta,
124 &local->sta_list, list) {
125 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
126 }
127 }
128 ieee80211_wake_queues_by_reason(hw,
129 IEEE80211_MAX_QUEUE_MAP,
130 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
131 false);
132 return err;
133 } else if (err > 0) {
134 WARN_ON(err != 1);
135 /* cfg80211 will call back into mac80211 to disconnect
136 * all interfaces, allow that to proceed properly
137 */
138 ieee80211_wake_queues_by_reason(hw,
139 IEEE80211_MAX_QUEUE_MAP,
140 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
141 false);
142 return err;
143 } else {
144 goto suspend;
145 }
146 }
147
148 /* remove all interfaces that were created in the driver */
149 list_for_each_entry(sdata, &local->interfaces, list) {
150 if (!ieee80211_sdata_running(sdata))
151 continue;
152 switch (sdata->vif.type) {
153 case NL80211_IFTYPE_AP_VLAN:
154 case NL80211_IFTYPE_MONITOR:
155 continue;
156 case NL80211_IFTYPE_STATION:
157 ieee80211_mgd_quiesce(sdata);
158 break;
159 default:
160 break;
161 }
162
163 wiphy_delayed_work_flush(local->hw.wiphy,
164 &sdata->dec_tailroom_needed_wk);
165 drv_remove_interface(local, sdata);
166 }
167
168 /*
169 * We disconnected on all interfaces before suspend, all channel
170 * contexts should be released, but on 'reset' debugfs that's
171 * not true so don't check there.
172 */
173 WARN_ON(!reset && !list_empty(&local->chanctx_list));
174
175 /* stop hardware - this must stop RX */
176 ieee80211_stop_device(local, true);
177
178 suspend:
179 local->suspended = true;
180 /* need suspended to be visible before quiescing is false */
181 barrier();
182 local->quiescing = false;
183 local->suspending = false;
184
185 return 0;
186}
187
188/*
189 * __ieee80211_resume() is a static inline which just calls
190 * ieee80211_reconfig(), which is also needed for hardware
191 * hang/firmware failure/etc. recovery.
192 */
193
194void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
195 struct cfg80211_wowlan_wakeup *wakeup,
196 gfp_t gfp)
197{
198 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
199
200 cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
201}
202EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);