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![Eliad Peller](/assets/img/avatar_default.png)
In case of "any" wowlan trigger, there is no reason to tear down aggregations, as we want the device to continue working normally. Similarly, there's no reason to tear down aggregations on resume, as they should have been torn down on suspend if needed. However, since the reconfiguration flow is shared with HW restart, tear down aggregations on reconfiguration when we are not resuming. To keep things working after non-wowlan suspend, keep clearing the WLAN_STA_BLOCK_BA flag. Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
196 lines
5.1 KiB
C
196 lines
5.1 KiB
C
#include <net/mac80211.h>
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#include <net/rtnetlink.h>
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#include "ieee80211_i.h"
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#include "mesh.h"
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#include "driver-ops.h"
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#include "led.h"
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int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_sub_if_data *sdata;
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struct sta_info *sta;
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if (!local->open_count)
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goto suspend;
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ieee80211_scan_cancel(local);
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ieee80211_dfs_cac_cancel(local);
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ieee80211_roc_purge(local, NULL);
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ieee80211_del_virtual_monitor(local);
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if (ieee80211_hw_check(hw, AMPDU_AGGREGATION) &&
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!(wowlan && wowlan->any)) {
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta, &local->sta_list, list) {
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set_sta_flag(sta, WLAN_STA_BLOCK_BA);
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ieee80211_sta_tear_down_BA_sessions(
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sta, AGG_STOP_LOCAL_REQUEST);
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}
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mutex_unlock(&local->sta_mtx);
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}
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ieee80211_stop_queues_by_reason(hw,
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IEEE80211_MAX_QUEUE_MAP,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND,
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false);
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/* flush out all packets */
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synchronize_net();
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ieee80211_flush_queues(local, NULL, true);
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local->quiescing = true;
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/* make quiescing visible to timers everywhere */
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mb();
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flush_workqueue(local->workqueue);
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/* Don't try to run timers while suspended. */
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del_timer_sync(&local->sta_cleanup);
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/*
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* Note that this particular timer doesn't need to be
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* restarted at resume.
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*/
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cancel_work_sync(&local->dynamic_ps_enable_work);
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del_timer_sync(&local->dynamic_ps_timer);
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local->wowlan = wowlan;
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if (local->wowlan) {
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int err;
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/* Drivers don't expect to suspend while some operations like
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* authenticating or associating are in progress. It doesn't
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* make sense anyway to accept that, since the authentication
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* or association would never finish since the driver can't do
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* that on its own.
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* Thus, clean up in-progress auth/assoc first.
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*/
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list_for_each_entry(sdata, &local->interfaces, list) {
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if (!ieee80211_sdata_running(sdata))
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continue;
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if (sdata->vif.type != NL80211_IFTYPE_STATION)
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continue;
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ieee80211_mgd_quiesce(sdata);
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/* If suspended during TX in progress, and wowlan
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* is enabled (connection will be active) there
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* can be a race where the driver is put out
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* of power-save due to TX and during suspend
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* dynamic_ps_timer is cancelled and TX packet
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* is flushed, leaving the driver in ACTIVE even
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* after resuming until dynamic_ps_timer puts
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* driver back in DOZE.
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*/
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if (sdata->u.mgd.associated &&
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sdata->u.mgd.powersave &&
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!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
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local->hw.conf.flags |= IEEE80211_CONF_PS;
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ieee80211_hw_config(local,
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IEEE80211_CONF_CHANGE_PS);
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}
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}
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err = drv_suspend(local, wowlan);
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if (err < 0) {
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local->quiescing = false;
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local->wowlan = false;
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if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta,
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&local->sta_list, list) {
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clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
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}
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mutex_unlock(&local->sta_mtx);
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}
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ieee80211_wake_queues_by_reason(hw,
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IEEE80211_MAX_QUEUE_MAP,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND,
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false);
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return err;
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} else if (err > 0) {
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WARN_ON(err != 1);
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/* cfg80211 will call back into mac80211 to disconnect
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* all interfaces, allow that to proceed properly
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*/
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ieee80211_wake_queues_by_reason(hw,
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IEEE80211_MAX_QUEUE_MAP,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND,
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false);
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return err;
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} else {
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goto suspend;
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}
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}
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/* remove all interfaces that were created in the driver */
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list_for_each_entry(sdata, &local->interfaces, list) {
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if (!ieee80211_sdata_running(sdata))
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continue;
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP_VLAN:
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case NL80211_IFTYPE_MONITOR:
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continue;
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case NL80211_IFTYPE_STATION:
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ieee80211_mgd_quiesce(sdata);
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break;
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case NL80211_IFTYPE_WDS:
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/* tear down aggregation sessions and remove STAs */
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mutex_lock(&local->sta_mtx);
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sta = sdata->u.wds.sta;
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if (sta && sta->uploaded) {
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enum ieee80211_sta_state state;
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state = sta->sta_state;
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for (; state > IEEE80211_STA_NOTEXIST; state--)
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WARN_ON(drv_sta_state(local, sta->sdata,
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sta, state,
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state - 1));
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}
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mutex_unlock(&local->sta_mtx);
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break;
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default:
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break;
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}
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drv_remove_interface(local, sdata);
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}
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/*
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* We disconnected on all interfaces before suspend, all channel
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* contexts should be released.
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*/
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WARN_ON(!list_empty(&local->chanctx_list));
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/* stop hardware - this must stop RX */
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if (local->open_count)
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ieee80211_stop_device(local);
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suspend:
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local->suspended = true;
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/* need suspended to be visible before quiescing is false */
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barrier();
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local->quiescing = false;
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return 0;
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}
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/*
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* __ieee80211_resume() is a static inline which just calls
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* ieee80211_reconfig(), which is also needed for hardware
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* hang/firmware failure/etc. recovery.
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*/
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void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
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struct cfg80211_wowlan_wakeup *wakeup,
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gfp_t gfp)
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{
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struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
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cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
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}
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EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
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