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wifi: mac80211: introduce ieee80211_refresh_tx_agg_session_timer()

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This allows low level drivers to refresh the tx agg session timer, based on
querying stats from the firmware usually. Especially for some mt76 devices
support .net_fill_forward_path would bypass mac80211, which leads to tx BA
session timeout clients that set a timeout in their AddBA response to our
request, even if our request is without a timeout.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Link: https://lore.kernel.org/r/7c3f72eac1c34921cd84a462e60d71e125862152.1676616450.git.ryder.lee@mediatek.com
[slightly clarify commit message, add note about RCU]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ryder Lee 2023-02-18 01:50:05 +08:00 committed by Johannes Berg
parent 9179dff825
commit 5383bfff52
2 changed files with 31 additions and 0 deletions
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14
include/net/mac80211.h
View File

@ -5973,6 +5973,20 @@ void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
struct delayed_work *dwork,
unsigned long delay);
/**
* ieee80211_refresh_tx_agg_session_timer - Refresh a tx agg session timer.
* @sta: the station for which to start a BA session
* @tid: the TID to BA on.
*
* This function allows low level driver to refresh tx agg session timer
* to maintain BA session, the session level will still be managed by the
* mac80211.
*
* Note: must be called in an RCU critical section.
*/
void ieee80211_refresh_tx_agg_session_timer(struct ieee80211_sta *sta,
u16 tid);
/**
* ieee80211_start_tx_ba_session - Start a tx Block Ack session.
* @sta: the station for which to start a BA session

17
net/mac80211/agg-tx.c
View File

@ -554,6 +554,23 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
ieee80211_send_addba_with_timeout(sta, tid_tx);
}
void ieee80211_refresh_tx_agg_session_timer(struct ieee80211_sta *pubsta,
u16 tid)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
struct tid_ampdu_tx *tid_tx;
if (WARN_ON_ONCE(tid >= IEEE80211_NUM_TIDS))
return;
tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
if (!tid_tx)
return;
tid_tx->last_tx = jiffies;
}
EXPORT_SYMBOL(ieee80211_refresh_tx_agg_session_timer);
/*
* After accepting the AddBA Response we activated a timer,
* resetting it after each frame that we send.