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mac80211: stop only the queues assigned to the vif during channel switch 

Instead of stopping all the hardware queues during channel switch,
which is especially bad when we have large CSA counts, stop only the
queues that are assigned to the vif that is performing the channel
switch.

Additionally, check for (sdata->csa_block_tx) instead of calling
ieee80211_csa_needs_block_tx(), which can now be removed.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho 2014-06-13 16:30:07 +03:00 committed by Johannes Berg
parent 26da23b695
commit a46992b441
4 changed files with 35 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
net/mac80211/cfg.c
View File

@ -790,31 +790,6 @@ static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
return 0;
}
bool ieee80211_csa_needs_block_tx(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata;
lockdep_assert_held(&local->mtx);
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (!ieee80211_sdata_running(sdata))
continue;
if (!sdata->vif.csa_active)
continue;
if (!sdata->csa_block_tx)
continue;
rcu_read_unlock();
return true;
}
rcu_read_unlock();
return false;
}
static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
@ -834,11 +809,12 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
/* abort any running channel switch */
mutex_lock(&local->mtx);
sdata->vif.csa_active = false;
if (!ieee80211_csa_needs_block_tx(local))
ieee80211_wake_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
mutex_unlock(&local->mtx);
kfree(sdata->u.ap.next_beacon);
@ -2826,11 +2802,11 @@ static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
ieee80211_bss_info_change_notify(sdata, changed);
cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
if (!ieee80211_csa_needs_block_tx(local))
ieee80211_wake_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
return 0;
}
@ -3060,10 +3036,8 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
sdata->vif.csa_active = true;
if (sdata->csa_block_tx)
ieee80211_stop_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
ieee80211_stop_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
if (changed) {
ieee80211_bss_info_change_notify(sdata, changed);

1
net/mac80211/ieee80211_i.h
View File

@ -1489,7 +1489,6 @@ void ieee80211_sw_roc_work(struct work_struct *work);
void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
/* channel switch handling */
bool ieee80211_csa_needs_block_tx(struct ieee80211_local *local);
void ieee80211_csa_finalize_work(struct work_struct *work);
int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_csa_settings *params);

10
net/mac80211/iface.c
View File

@ -841,11 +841,11 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
sdata_lock(sdata);
mutex_lock(&local->mtx);
sdata->vif.csa_active = false;
if (!ieee80211_csa_needs_block_tx(local))
ieee80211_wake_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
mutex_unlock(&local->mtx);
sdata_unlock(sdata);

36
net/mac80211/mlme.c
View File

@ -980,11 +980,11 @@ static void ieee80211_chswitch_work(struct work_struct *work)
mutex_lock(&local->mtx);
sdata->vif.csa_active = false;
/* XXX: wait for a beacon first? */
if (!ieee80211_csa_needs_block_tx(local))
ieee80211_wake_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
mutex_unlock(&local->mtx);
ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
@ -1114,10 +1114,8 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
sdata->csa_block_tx = csa_ie.mode;
if (sdata->csa_block_tx)
ieee80211_stop_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
ieee80211_stop_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
mutex_unlock(&local->mtx);
if (local->ops->channel_switch) {
@ -1833,11 +1831,11 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
ieee80211_vif_release_channel(sdata);
sdata->vif.csa_active = false;
if (!ieee80211_csa_needs_block_tx(local))
ieee80211_wake_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
mutex_unlock(&local->mtx);
sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
@ -2083,11 +2081,11 @@ static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
mutex_lock(&local->mtx);
sdata->vif.csa_active = false;
if (!ieee80211_csa_needs_block_tx(local))
ieee80211_wake_queues_by_reason(&local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA,
false);
if (sdata->csa_block_tx) {
ieee80211_wake_vif_queues(local, sdata,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_block_tx = false;
}
mutex_unlock(&local->mtx);
cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,