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 | |
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(wiphy: local->hw.wiphy, reqid: 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, flag: WLAN_STA_BLOCK_BA); |
46 | ieee80211_sta_tear_down_BA_sessions( |
47 | sta, reason: 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 | queues: IEEE80211_MAX_QUEUE_MAP, |
57 | reason: IEEE80211_QUEUE_STOP_REASON_SUSPEND, |
58 | refcounted: false); |
59 | |
60 | /* flush out all packets */ |
61 | synchronize_net(); |
62 | |
63 | ieee80211_flush_queues(local, NULL, drop: 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(timer: &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(wiphy: local->hw.wiphy, work: &local->dynamic_ps_enable_work); |
79 | del_timer_sync(timer: &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 | changed: 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, flag: WLAN_STA_BLOCK_BA); |
125 | } |
126 | } |
127 | ieee80211_wake_queues_by_reason(hw, |
128 | queues: IEEE80211_MAX_QUEUE_MAP, |
129 | reason: IEEE80211_QUEUE_STOP_REASON_SUSPEND, |
130 | refcounted: 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 | queues: IEEE80211_MAX_QUEUE_MAP, |
139 | reason: IEEE80211_QUEUE_STOP_REASON_SUSPEND, |
140 | refcounted: 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(wiphy: local->hw.wiphy, |
163 | dwork: &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 | |
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(p: vif); |
197 | |
198 | cfg80211_report_wowlan_wakeup(wdev: &sdata->wdev, wakeup, gfp); |
199 | } |
200 | EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); |
201 | |