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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 | int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) |
10 | { |
11 | struct ieee80211_local *local = hw_to_local(hw); |
12 | struct ieee80211_sub_if_data *sdata; |
13 | struct sta_info *sta; |
14 | |
15 | if (!local->open_count) |
16 | goto suspend; |
17 | |
18 | ieee80211_scan_cancel(local); |
19 | |
20 | ieee80211_dfs_cac_cancel(local); |
21 | |
22 | ieee80211_roc_purge(local, NULL); |
23 | |
24 | ieee80211_del_virtual_monitor(local); |
25 | |
26 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
27 | mutex_lock(&local->sta_mtx); |
28 | list_for_each_entry(sta, &local->sta_list, list) { |
29 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
30 | ieee80211_sta_tear_down_BA_sessions( |
31 | sta, AGG_STOP_LOCAL_REQUEST); |
32 | } |
33 | mutex_unlock(&local->sta_mtx); |
34 | } |
35 | |
36 | ieee80211_stop_queues_by_reason(hw, |
37 | IEEE80211_MAX_QUEUE_MAP, |
38 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
39 | |
40 | /* flush out all packets */ |
41 | synchronize_net(); |
42 | |
43 | ieee80211_flush_queues(local, NULL); |
44 | |
45 | local->quiescing = true; |
46 | /* make quiescing visible to timers everywhere */ |
47 | mb(); |
48 | |
49 | flush_workqueue(local->workqueue); |
50 | |
51 | /* Don't try to run timers while suspended. */ |
52 | del_timer_sync(&local->sta_cleanup); |
53 | |
54 | /* |
55 | * Note that this particular timer doesn't need to be |
56 | * restarted at resume. |
57 | */ |
58 | cancel_work_sync(&local->dynamic_ps_enable_work); |
59 | del_timer_sync(&local->dynamic_ps_timer); |
60 | |
61 | local->wowlan = wowlan && local->open_count; |
62 | if (local->wowlan) { |
63 | int err = drv_suspend(local, wowlan); |
64 | if (err < 0) { |
65 | local->quiescing = false; |
66 | local->wowlan = false; |
67 | if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { |
68 | mutex_lock(&local->sta_mtx); |
69 | list_for_each_entry(sta, |
70 | &local->sta_list, list) { |
71 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
72 | } |
73 | mutex_unlock(&local->sta_mtx); |
74 | } |
75 | ieee80211_wake_queues_by_reason(hw, |
76 | IEEE80211_MAX_QUEUE_MAP, |
77 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); |
78 | return err; |
79 | } else if (err > 0) { |
80 | WARN_ON(err != 1); |
81 | return err; |
82 | } else { |
83 | goto suspend; |
84 | } |
85 | } |
86 | |
87 | /* tear down aggregation sessions and remove STAs */ |
88 | mutex_lock(&local->sta_mtx); |
89 | list_for_each_entry(sta, &local->sta_list, list) { |
90 | if (sta->uploaded) { |
91 | enum ieee80211_sta_state state; |
92 | |
93 | state = sta->sta_state; |
94 | for (; state > IEEE80211_STA_NOTEXIST; state--) |
95 | WARN_ON(drv_sta_state(local, sta->sdata, sta, |
96 | state, state - 1)); |
97 | } |
98 | } |
99 | mutex_unlock(&local->sta_mtx); |
100 | |
101 | /* remove all interfaces that were created in the driver */ |
102 | list_for_each_entry(sdata, &local->interfaces, list) { |
103 | if (!ieee80211_sdata_running(sdata)) |
104 | continue; |
105 | switch (sdata->vif.type) { |
106 | case NL80211_IFTYPE_AP_VLAN: |
107 | case NL80211_IFTYPE_MONITOR: |
108 | continue; |
109 | case NL80211_IFTYPE_STATION: |
110 | ieee80211_mgd_quiesce(sdata); |
111 | break; |
112 | default: |
113 | break; |
114 | } |
115 | |
116 | drv_remove_interface(local, sdata); |
117 | } |
118 | |
119 | /* |
120 | * We disconnected on all interfaces before suspend, all channel |
121 | * contexts should be released. |
122 | */ |
123 | WARN_ON(!list_empty(&local->chanctx_list)); |
124 | |
125 | /* stop hardware - this must stop RX */ |
126 | if (local->open_count) |
127 | ieee80211_stop_device(local); |
128 | |
129 | suspend: |
130 | local->suspended = true; |
131 | /* need suspended to be visible before quiescing is false */ |
132 | barrier(); |
133 | local->quiescing = false; |
134 | |
135 | return 0; |
136 | } |
137 | |
138 | /* |
139 | * __ieee80211_resume() is a static inline which just calls |
140 | * ieee80211_reconfig(), which is also needed for hardware |
141 | * hang/firmware failure/etc. recovery. |
142 | */ |
143 | |
144 | void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, |
145 | struct cfg80211_wowlan_wakeup *wakeup, |
146 | gfp_t gfp) |
147 | { |
148 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
149 | |
150 | cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp); |
151 | } |
152 | EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup); |
153 |
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