1#include <net/mac80211.h>
2#include <net/rtnetlink.h>
3
4#include "ieee80211_i.h"
5#include "mesh.h"
6#include "driver-ops.h"
7#include "led.h"
8
9
10static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
11{
12 switch (sdata->vif.type) {
13 case NL80211_IFTYPE_STATION:
14 ieee80211_sta_quiesce(sdata);
15 return true;
16 case NL80211_IFTYPE_ADHOC:
17 ieee80211_ibss_quiesce(sdata);
18 return true;
19 case NL80211_IFTYPE_MESH_POINT:
20 ieee80211_mesh_quiesce(sdata);
21 return true;
22 case NL80211_IFTYPE_AP_VLAN:
23 case NL80211_IFTYPE_MONITOR:
24
25 return false;
26 default:
27 return true;
28 }
29}
30
31int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
32{
33 struct ieee80211_local *local = hw_to_local(hw);
34 struct ieee80211_sub_if_data *sdata;
35 struct sta_info *sta;
36 struct ieee80211_chanctx *ctx;
37
38 if (!local->open_count)
39 goto suspend;
40
41 ieee80211_scan_cancel(local);
42
43 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
44 mutex_lock(&local->sta_mtx);
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(sta, true);
48 }
49 mutex_unlock(&local->sta_mtx);
50 }
51
52 ieee80211_stop_queues_by_reason(hw,
53 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
54
55
56 synchronize_net();
57
58 drv_flush(local, false);
59
60 local->quiescing = true;
61
62 mb();
63
64 flush_workqueue(local->workqueue);
65
66
67 del_timer_sync(&local->sta_cleanup);
68
69
70
71
72
73 cancel_work_sync(&local->dynamic_ps_enable_work);
74 del_timer_sync(&local->dynamic_ps_timer);
75
76 local->wowlan = wowlan && local->open_count;
77 if (local->wowlan) {
78 int err = drv_suspend(local, wowlan);
79 if (err < 0) {
80 local->quiescing = false;
81 local->wowlan = false;
82 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
83 mutex_lock(&local->sta_mtx);
84 list_for_each_entry(sta,
85 &local->sta_list, list) {
86 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
87 }
88 mutex_unlock(&local->sta_mtx);
89 }
90 ieee80211_wake_queues_by_reason(hw,
91 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
92 return err;
93 } else if (err > 0) {
94 WARN_ON(err != 1);
95 local->wowlan = false;
96 } else {
97 list_for_each_entry(sdata, &local->interfaces, list) {
98 cancel_work_sync(&sdata->work);
99 ieee80211_quiesce(sdata);
100 }
101 goto suspend;
102 }
103 }
104
105
106 list_for_each_entry(sdata, &local->interfaces, list)
107 ieee80211_disable_keys(sdata);
108
109
110 mutex_lock(&local->sta_mtx);
111 list_for_each_entry(sta, &local->sta_list, list) {
112 if (sta->uploaded) {
113 enum ieee80211_sta_state state;
114
115 state = sta->sta_state;
116 for (; state > IEEE80211_STA_NOTEXIST; state--)
117 WARN_ON(drv_sta_state(local, sta->sdata, sta,
118 state, state - 1));
119 }
120
121 mesh_plink_quiesce(sta);
122 }
123 mutex_unlock(&local->sta_mtx);
124
125
126 list_for_each_entry(sdata, &local->interfaces, list) {
127 cancel_work_sync(&sdata->work);
128
129 if (!ieee80211_quiesce(sdata))
130 continue;
131
132 if (!ieee80211_sdata_running(sdata))
133 continue;
134
135
136 ieee80211_bss_info_change_notify(sdata,
137 BSS_CHANGED_BEACON_ENABLED);
138
139 if (sdata->vif.type == NL80211_IFTYPE_AP &&
140 rcu_access_pointer(sdata->u.ap.beacon))
141 drv_stop_ap(local, sdata);
142
143 if (local->use_chanctx) {
144 struct ieee80211_chanctx_conf *conf;
145
146 mutex_lock(&local->chanctx_mtx);
147 conf = rcu_dereference_protected(
148 sdata->vif.chanctx_conf,
149 lockdep_is_held(&local->chanctx_mtx));
150 if (conf) {
151 ctx = container_of(conf,
152 struct ieee80211_chanctx,
153 conf);
154 drv_unassign_vif_chanctx(local, sdata, ctx);
155 }
156
157 mutex_unlock(&local->chanctx_mtx);
158 }
159 drv_remove_interface(local, sdata);
160 }
161
162 sdata = rtnl_dereference(local->monitor_sdata);
163 if (sdata) {
164 if (local->use_chanctx) {
165 struct ieee80211_chanctx_conf *conf;
166
167 mutex_lock(&local->chanctx_mtx);
168 conf = rcu_dereference_protected(
169 sdata->vif.chanctx_conf,
170 lockdep_is_held(&local->chanctx_mtx));
171 if (conf) {
172 ctx = container_of(conf,
173 struct ieee80211_chanctx,
174 conf);
175 drv_unassign_vif_chanctx(local, sdata, ctx);
176 }
177
178 mutex_unlock(&local->chanctx_mtx);
179 }
180
181 drv_remove_interface(local, sdata);
182 }
183
184 mutex_lock(&local->chanctx_mtx);
185 list_for_each_entry(ctx, &local->chanctx_list, list)
186 drv_remove_chanctx(local, ctx);
187 mutex_unlock(&local->chanctx_mtx);
188
189
190 if (local->open_count)
191 ieee80211_stop_device(local);
192
193 suspend:
194 local->suspended = true;
195
196 barrier();
197 local->quiescing = false;
198
199 return 0;
200}
201
202
203
204
205
206
207
