diff options
| author | Toke Høiland-Jørgensen <toke@toke.dk> | 2017-10-31 12:27:46 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2017-12-11 12:40:24 +0100 |
| commit | b0d52ad821843a6c5badebd80feef9f871904fa6 (patch) | |
| tree | 6962b03bd69935102294e2038ae615309091f3d4 /net/mac80211/tx.c | |
| parent | e937b8da5a591f141fe41aa48a2e898df9888c95 (diff) | |
| download | linux-b0d52ad821843a6c5badebd80feef9f871904fa6.tar.bz2 | |
mac80211: Add airtime account and scheduling to TXQs
This adds airtime accounting and scheduling to the mac80211 TXQ
scheduler. A new hardware flag, AIRTIME_ACCOUNTING, is added that
drivers can set if they support reporting airtime usage of
transmissions. When this flag is set, mac80211 will expect the actual
airtime usage to be reported in the tx_time and rx_time fields of the
respective status structs.
When airtime information is present, mac80211 will schedule TXQs
(through ieee80211_next_txq()) in a way that enforces airtime fairness
between active stations. This scheduling works the same way as the ath9k
in-driver airtime fairness scheduling.
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 842881ca8f20..18381581b5e9 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -3566,7 +3566,7 @@ bool ieee80211_schedule_txq(struct ieee80211_hw *hw, spin_lock_bh(&local->active_txq_lock); if (list_empty(&txqi->schedule_order)) { - list_add_tail(&txqi->schedule_order, &local->active_txqs); + list_add_tail(&txqi->schedule_order, &local->active_txqs_new); ret = true; } @@ -3580,14 +3580,35 @@ struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw) { struct ieee80211_local *local = hw_to_local(hw); struct txq_info *txqi = NULL; + struct list_head *head; spin_lock_bh(&local->active_txq_lock); - if (list_empty(&local->active_txqs)) - goto out; +begin: + head = &local->active_txqs_new; + if (list_empty(head)) { + head = &local->active_txqs_old; + if (list_empty(head)) + goto out; + } + + txqi = list_first_entry(head, struct txq_info, schedule_order); + + if (txqi->txq.sta) { + struct sta_info *sta = container_of(txqi->txq.sta, + struct sta_info, sta); + + spin_lock_bh(&sta->lock); + if (sta->airtime_deficit < 0) { + sta->airtime_deficit += IEEE80211_AIRTIME_QUANTUM; + list_move_tail(&txqi->schedule_order, + &local->active_txqs_old); + spin_unlock_bh(&sta->lock); + goto begin; + } + spin_unlock_bh(&sta->lock); + } - txqi = list_first_entry(&local->active_txqs, - struct txq_info, schedule_order); list_del_init(&txqi->schedule_order); out: |