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mac80211: unify and fix TX aggregation start

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When TX aggregation becomes operational, we do a number of steps:
 1) print a debug message
 2) wake the virtual queue
 3) notify the driver

Unfortunately, 1) and 3) are only done if the driver is first to
reply to the aggregation request, it is, however, possible that the
remote station replies before the driver! Thus, unify the code for
this and call the new function ieee80211_agg_tx_operational in both
places where TX aggregation can become operational.

Additionally, rename the driver notification from
IEEE80211_AMPDU_TX_RESUME to IEEE80211_AMPDU_TX_OPERATIONAL.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-03-23 17:28:39 +01:00 committed by John W. Linville
parent 1870cd71e8
commit b1720231ca
3 changed files with 30 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/ath9k/main.c
View File

@ -2730,7 +2730,7 @@ static int ath9k_ampdu_action(struct ieee80211_hw *hw,
ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
break;
case IEEE80211_AMPDU_TX_RESUME:
case IEEE80211_AMPDU_TX_OPERATIONAL:
ath_tx_aggr_resume(sc, sta, tid);
break;
default:

4
include/net/mac80211.h
View File

@ -1236,14 +1236,14 @@ enum ieee80211_filter_flags {
* @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
* @IEEE80211_AMPDU_TX_START: start Tx aggregation
* @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation
* @IEEE80211_AMPDU_TX_RESUME: resume TX aggregation
* @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational
*/
enum ieee80211_ampdu_mlme_action {
IEEE80211_AMPDU_RX_START,
IEEE80211_AMPDU_RX_STOP,
IEEE80211_AMPDU_TX_START,
IEEE80211_AMPDU_TX_STOP,
IEEE80211_AMPDU_TX_RESUME,
IEEE80211_AMPDU_TX_OPERATIONAL,
};
/**

63
net/mac80211/agg-tx.c
View File

@ -404,6 +404,27 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
}
EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
struct sta_info *sta, u16 tid)
{
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
#endif
if (local->hw.ampdu_queues) {
/*
* Wake up the A-MPDU queue, we stopped it earlier,
* this will in turn wake the entire AC.
*/
ieee80211_wake_queue_by_reason(&local->hw,
local->hw.queues + sta->tid_to_tx_q[tid],
IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
}
local->ops->ampdu_action(&local->hw, IEEE80211_AMPDU_TX_OPERATIONAL,
&sta->sta, tid, NULL);
}
void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
{
struct ieee80211_local *local = hw_to_local(hw);
@ -446,20 +467,8 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
*state |= HT_ADDBA_DRV_READY_MSK;
if (*state == HT_AGG_STATE_OPERATIONAL) {
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
#endif
if (hw->ampdu_queues) {
/*
* Wake up this queue, we stopped it earlier,
* this will in turn wake the entire AC.
*/
ieee80211_wake_queue_by_reason(hw,
hw->queues + sta->tid_to_tx_q[tid],
IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
}
}
if (*state == HT_AGG_STATE_OPERATIONAL)
ieee80211_agg_tx_operational(local, sta, tid);
out:
spin_unlock_bh(&sta->lock);
@ -646,9 +655,7 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
struct ieee80211_mgmt *mgmt,
size_t len)
{
struct ieee80211_hw *hw = &local->hw;
u16 capab;
u16 tid, start_seq_num;
u16 capab, tid;
u8 *state;
capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
@ -682,26 +689,10 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
*state |= HT_ADDBA_RECEIVED_MSK;
if (hw->ampdu_queues && *state != curstate &&
*state == HT_AGG_STATE_OPERATIONAL) {
/*
* Wake up this queue, we stopped it earlier,
* this will in turn wake the entire AC.
*/
ieee80211_wake_queue_by_reason(hw,
hw->queues + sta->tid_to_tx_q[tid],
IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
}
sta->ampdu_mlme.addba_req_num[tid] = 0;
if (*state != curstate && *state == HT_AGG_STATE_OPERATIONAL)
ieee80211_agg_tx_operational(local, sta, tid);
if (local->ops->ampdu_action) {
(void)local->ops->ampdu_action(hw,
IEEE80211_AMPDU_TX_RESUME,
&sta->sta, tid, &start_seq_num);
}
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Resuming TX aggregation for tid %d\n", tid);
#endif /* CONFIG_MAC80211_HT_DEBUG */
sta->ampdu_mlme.addba_req_num[tid] = 0;
} else {
sta->ampdu_mlme.addba_req_num[tid]++;
___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);