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mac80211: agg-tx: add an option to defer ADDBA transmit

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Driver tells mac80211 to sends ADDBA with SSN (starting sequence number)
from the head of the queue, while the transmission of all the frames in the
queue may take a while, which causes the peer to time out. In order to
fix this scenario, add an option to defer ADDBA transmit until queue
is drained.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200326150855.0f27423fec75.If67daab123a27c1cbddef000d6a3f212aa6309ef@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Mordechay Goodstein 2020-03-26 15:09:38 +02:00 committed by Johannes Berg
parent 31d8bb4e07
commit 0c197f16f7
3 changed files with 18 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/net/mac80211.h
View File

@ -3125,7 +3125,10 @@ enum ieee80211_filter_flags {
* @IEEE80211_AMPDU_RX_START: start RX aggregation
* @IEEE80211_AMPDU_RX_STOP: stop RX aggregation
* @IEEE80211_AMPDU_TX_START: start TX aggregation, the driver must either
* call ieee80211_start_tx_ba_cb_irqsafe() or return the special
* call ieee80211_start_tx_ba_cb_irqsafe() or
* call ieee80211_start_tx_ba_cb_irqsafe() with status
* %IEEE80211_AMPDU_TX_START_DELAY_ADDBA to delay addba after
* ieee80211_start_tx_ba_cb_irqsafe is called, or just return the special
* status %IEEE80211_AMPDU_TX_START_IMMEDIATE.
* @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational
* @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting
@ -3151,6 +3154,7 @@ enum ieee80211_ampdu_mlme_action {
};
#define IEEE80211_AMPDU_TX_START_IMMEDIATE 1
#define IEEE80211_AMPDU_TX_START_DELAY_ADDBA 2
/**
* struct ieee80211_ampdu_params - AMPDU action parameters

12
net/mac80211/agg-tx.c
View File

@ -483,6 +483,8 @@ static void ieee80211_send_addba_with_timeout(struct sta_info *sta,
tid_tx->dialog_token,
sta->tid_seq[tid] >> 4,
buf_size, tid_tx->timeout);
WARN_ON(test_and_set_bit(HT_AGG_STATE_SENT_ADDBA, &tid_tx->state));
}
void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
@ -521,7 +523,9 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
params.ssn = sta->tid_seq[tid] >> 4;
ret = drv_ampdu_action(local, sdata, &params);
if (ret == IEEE80211_AMPDU_TX_START_IMMEDIATE) {
if (ret == IEEE80211_AMPDU_TX_START_DELAY_ADDBA) {
return;
} else if (ret == IEEE80211_AMPDU_TX_START_IMMEDIATE) {
/*
* We didn't send the request yet, so don't need to check
* here if we already got a response, just mark as driver
@ -765,6 +769,12 @@ void ieee80211_start_tx_ba_cb(struct sta_info *sta, int tid,
if (WARN_ON(test_and_set_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)))
return;
if (!test_bit(HT_AGG_STATE_SENT_ADDBA, &tid_tx->state)) {
ieee80211_send_addba_with_timeout(sta, tid_tx);
/* RESPONSE_RECEIVED state whould trigger the flow again */
return;
}
if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state))
ieee80211_agg_tx_operational(local, sta, tid);
}

2
net/mac80211/sta_info.h
View File

@ -3,6 +3,7 @@
* Copyright 2002-2005, Devicescape Software, Inc.
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright(c) 2015-2017 Intel Deutschland GmbH
* Copyright(c) 2020 Intel Corporation
*/
#ifndef STA_INFO_H
@ -116,6 +117,7 @@ enum ieee80211_sta_info_flags {
#define HT_AGG_STATE_WANT_STOP 5
#define HT_AGG_STATE_START_CB 6
#define HT_AGG_STATE_STOP_CB 7
#define HT_AGG_STATE_SENT_ADDBA 8
DECLARE_EWMA(avg_signal, 10, 8)
enum ieee80211_agg_stop_reason {