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
14 static 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
21 int __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, true);
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
192 void 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 }
200 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
201
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