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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a05829a7 JB |
2 | /* |
3 | * Portions | |
4 | * Copyright (C) 2020-2021 Intel Corporation | |
5 | */ | |
665af4fc BC |
6 | #include <net/mac80211.h> |
7 | #include <net/rtnetlink.h> | |
8 | ||
9 | #include "ieee80211_i.h" | |
5bb644a0 | 10 | #include "mesh.h" |
24487981 | 11 | #include "driver-ops.h" |
665af4fc BC |
12 | #include "led.h" |
13 | ||
0d440ea2 EP |
14 | static void ieee80211_sched_scan_cancel(struct ieee80211_local *local) |
15 | { | |
16 | if (ieee80211_request_sched_scan_stop(local)) | |
17 | return; | |
a05829a7 | 18 | cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); |
0d440ea2 EP |
19 | } |
20 | ||
eecc4800 | 21 | int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) |
665af4fc BC |
22 | { |
23 | struct ieee80211_local *local = hw_to_local(hw); | |
24 | struct ieee80211_sub_if_data *sdata; | |
665af4fc BC |
25 | struct sta_info *sta; |
26 | ||
94f9b97b JB |
27 | if (!local->open_count) |
28 | goto suspend; | |
29 | ||
4136c422 | 30 | ieee80211_scan_cancel(local); |
5bb644a0 | 31 | |
164eb02d SW |
32 | ieee80211_dfs_cac_cancel(local); |
33 | ||
c8f994ee JB |
34 | ieee80211_roc_purge(local, NULL); |
35 | ||
3c3e21e7 JB |
36 | ieee80211_del_virtual_monitor(local); |
37 | ||
27392719 EP |
38 | if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) && |
39 | !(wowlan && wowlan->any)) { | |
ca45de77 JB |
40 | mutex_lock(&local->sta_mtx); |
41 | list_for_each_entry(sta, &local->sta_list, list) { | |
c2c98fde | 42 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 JB |
43 | ieee80211_sta_tear_down_BA_sessions( |
44 | sta, AGG_STOP_LOCAL_REQUEST); | |
ca45de77 JB |
45 | } |
46 | mutex_unlock(&local->sta_mtx); | |
47 | } | |
48 | ||
0d440ea2 EP |
49 | /* keep sched_scan only in case of 'any' trigger */ |
50 | if (!(wowlan && wowlan->any)) | |
51 | ieee80211_sched_scan_cancel(local); | |
52 | ||
25420604 | 53 | ieee80211_stop_queues_by_reason(hw, |
445ea4e8 | 54 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
55 | IEEE80211_QUEUE_STOP_REASON_SUSPEND, |
56 | false); | |
25420604 | 57 | |
d34ba216 | 58 | /* flush out all packets */ |
8ceb5955 | 59 | synchronize_net(); |
5bb644a0 | 60 | |
3b24f4c6 | 61 | ieee80211_flush_queues(local, NULL, true); |
ca45de77 | 62 | |
5bb644a0 JB |
63 | local->quiescing = true; |
64 | /* make quiescing visible to timers everywhere */ | |
65 | mb(); | |
66 | ||
42935eca | 67 | flush_workqueue(local->workqueue); |
665af4fc | 68 | |
5bb644a0 JB |
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 | ||
8bb6f4b9 | 79 | local->wowlan = wowlan; |
eecc4800 | 80 | if (local->wowlan) { |
ef7c6725 JB |
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); | |
541b6ed7 C |
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 | } | |
ef7c6725 JB |
112 | } |
113 | ||
114 | err = drv_suspend(local, wowlan); | |
2b4562df | 115 | if (err < 0) { |
eecc4800 | 116 | local->quiescing = false; |
3b08cf6b | 117 | local->wowlan = false; |
30686bf7 | 118 | if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { |
9ea4fa15 ES |
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, | |
445ea4e8 | 127 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
128 | IEEE80211_QUEUE_STOP_REASON_SUSPEND, |
129 | false); | |
eecc4800 | 130 | return err; |
2b4562df JB |
131 | } else if (err > 0) { |
132 | WARN_ON(err != 1); | |
23e37098 JB |
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); | |
81256969 | 140 | return err; |
2b4562df | 141 | } else { |
2b4562df | 142 | goto suspend; |
eecc4800 | 143 | } |
eecc4800 JB |
144 | } |
145 | ||
cd34f647 | 146 | /* remove all interfaces that were created in the driver */ |
665af4fc | 147 | list_for_each_entry(sdata, &local->interfaces, list) { |
1a1cb744 | 148 | if (!ieee80211_sdata_running(sdata)) |
5bb644a0 | 149 | continue; |
1a1cb744 JB |
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 | } | |
cd34f647 | 160 | |
a9e9200d | 161 | flush_delayed_work(&sdata->dec_tailroom_needed_wk); |
7b7eab6f | 162 | drv_remove_interface(local, sdata); |
665af4fc | 163 | } |
5bb644a0 | 164 | |
12e7f517 SG |
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)); | |
4b6f1dd6 | 170 | |
89c3a8ac | 171 | /* stop hardware - this must stop RX */ |
4854f175 | 172 | ieee80211_stop_device(local); |
89c3a8ac | 173 | |
eecc4800 | 174 | suspend: |
5bb644a0 | 175 | local->suspended = true; |
89c3a8ac JB |
176 | /* need suspended to be visible before quiescing is false */ |
177 | barrier(); | |
5bb644a0 JB |
178 | local->quiescing = false; |
179 | ||
665af4fc BC |
180 | return 0; |
181 | } | |
182 | ||
f2753ddb JB |
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 | */ | |
cd8f7cb4 JB |
188 | |
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); |