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
ieee80211_sched_scan_cancel(struct ieee80211_local * local)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
__ieee80211_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)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 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
ieee80211_report_wowlan_wakeup(struct ieee80211_vif * vif,struct cfg80211_wowlan_wakeup * wakeup,gfp_t gfp)189 void 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 }
197 EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
198
