mirror of
https://github.com/outbackdingo/mt76.git
synced 2026-10-24 13:26:48 +00:00
320 lines
7.1 KiB
C
320 lines
7.1 KiB
C
/*
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* Copyright (C) 2015 Felix Fietkau <[email protected]>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "mt76.h"
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static int
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mt76_txq_get_qid(struct ieee80211_txq *txq)
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{
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if (!txq->sta)
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return MT_TXQ_BE;
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return txq->ac;
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}
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static struct sk_buff *
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mt76_txq_dequeue(struct mt76_dev *dev, struct mt76_txq *mtxq, bool ps)
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{
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struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
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struct sk_buff *skb;
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skb = skb_dequeue(&mtxq->retry_q);
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if (skb) {
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u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
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if (ps && skb_queue_empty(&mtxq->retry_q));
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ieee80211_sta_set_buffered(txq->sta, tid, false);
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return skb;
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}
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skb = ieee80211_tx_dequeue(dev->hw, txq);
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if (!skb)
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return NULL;
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return skb;
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}
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static void
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mt76_check_agg_ssn(struct mt76_txq *mtxq, struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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if (!ieee80211_is_data_qos(hdr->frame_control))
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return;
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mtxq->agg_ssn = le16_to_cpu(hdr->seq_ctrl) + 0x10;
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}
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static void
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mt76_queue_ps_skb(struct mt76_dev *dev, struct ieee80211_sta *sta,
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struct sk_buff *skb, bool last)
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{
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struct mt76_wcid *wcid = (struct mt76_wcid *) sta->drv_priv;
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct mt76_queue *hwq = &dev->q_tx[MT_TXQ_PSD];
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info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
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if (last)
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info->flags |= IEEE80211_TX_STATUS_EOSP;
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mt76_skb_set_moredata(skb, !last);
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mt76_tx_queue_skb(dev, hwq, skb, wcid, sta);
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}
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void
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mt76_release_buffered_frames(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
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u16 tids, int nframes,
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enum ieee80211_frame_release_type reason,
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bool more_data)
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{
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struct mt76_dev *dev = hw->priv;
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struct sk_buff *last_skb = NULL;
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struct mt76_queue *hwq = &dev->q_tx[MT_TXQ_PSD];
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int i;
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for (i = 0; tids && nframes; i++, tids >>= 1) {
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struct ieee80211_txq *txq = sta->txq[i];
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struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv;
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struct sk_buff *skb;
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if (!(tids & 1))
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continue;
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do {
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skb = mt76_txq_dequeue(dev, mtxq, true);
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if (!skb)
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break;
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if (mtxq->aggr)
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mt76_check_agg_ssn(mtxq, skb);
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nframes--;
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if (last_skb) {
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mt76_queue_ps_skb(dev, sta, last_skb, false);
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last_skb = skb;
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}
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} while (nframes);
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}
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if (!last_skb)
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return;
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mt76_queue_ps_skb(dev, sta, last_skb, true);
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dev->queue_ops->kick(dev, hwq);
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}
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EXPORT_SYMBOL_GPL(mt76_release_buffered_frames);
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static int
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mt76_txq_send_burst(struct mt76_dev *dev, struct mt76_queue *hwq,
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struct mt76_txq *mtxq, bool *empty)
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{
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struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
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struct ieee80211_tx_info *info;
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struct mt76_wcid *wcid = mtxq->wcid;
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struct sk_buff *skb = NULL;
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int n_frames = 1, limit;
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struct ieee80211_tx_rate tx_rate;
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bool ampdu;
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bool probe;
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int idx;
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skb = mt76_txq_dequeue(dev, mtxq, false);
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if (!skb) {
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*empty = true;
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return 0;
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}
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info = IEEE80211_SKB_CB(skb);
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if (!wcid->tx_rate_set)
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ieee80211_get_tx_rates(txq->vif, txq->sta, skb,
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info->control.rates, 1);
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tx_rate = info->control.rates[0];
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probe = (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE);
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ampdu = IEEE80211_SKB_CB(skb)->flags & IEEE80211_TX_CTL_AMPDU;
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limit = ampdu ? 16 : 3;
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if (ampdu)
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mt76_check_agg_ssn(mtxq, skb);
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idx = mt76_tx_queue_skb(dev, hwq, skb, wcid, txq->sta);
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if (idx < 0)
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return idx;
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do {
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bool cur_ampdu;
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if (probe)
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break;
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skb = mt76_txq_dequeue(dev, mtxq, false);
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if (!skb) {
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*empty = true;
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break;
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}
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cur_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
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if (ampdu != cur_ampdu ||
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(info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)) {
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skb_queue_tail(&mtxq->retry_q, skb);
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break;
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}
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info = IEEE80211_SKB_CB(skb);
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info->control.rates[0] = tx_rate;
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if (cur_ampdu)
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mt76_check_agg_ssn(mtxq, skb);
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idx = mt76_tx_queue_skb(dev, hwq, skb, wcid, txq->sta);
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if (idx < 0)
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return idx;
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n_frames++;
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} while (n_frames < limit);
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if (!probe) {
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hwq->swq_queued++;
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hwq->entry[idx].schedule = true;
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}
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dev->queue_ops->kick(dev, hwq);
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return n_frames;
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}
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static int
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mt76_txq_schedule_list(struct mt76_dev *dev, struct mt76_queue *hwq)
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{
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struct mt76_txq *mtxq, *mtxq_last;
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int len = 0;
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restart:
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mtxq_last = list_last_entry(&hwq->swq, struct mt76_txq, list);
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while (!list_empty(&hwq->swq)) {
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bool empty = false;
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int cur;
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mtxq = list_first_entry(&hwq->swq, struct mt76_txq, list);
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if (mtxq->send_bar && mtxq->aggr) {
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struct ieee80211_txq *txq = mtxq_to_txq(mtxq);
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struct ieee80211_sta *sta = txq->sta;
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struct ieee80211_vif *vif = txq->vif;
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u16 agg_ssn = mtxq->agg_ssn;
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u8 tid = txq->tid;
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mtxq->send_bar = false;
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spin_unlock_bh(&hwq->lock);
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ieee80211_send_bar(vif, sta->addr, tid, agg_ssn);
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spin_lock_bh(&hwq->lock);
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goto restart;
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}
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list_del_init(&mtxq->list);
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cur = mt76_txq_send_burst(dev, hwq, mtxq, &empty);
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if (!empty)
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list_add_tail(&mtxq->list, &hwq->swq);
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if (cur < 0)
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return cur;
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len += cur;
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if (mtxq == mtxq_last)
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break;
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}
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return len;
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}
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void mt76_txq_schedule(struct mt76_dev *dev, struct mt76_queue *hwq)
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{
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int len;
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do {
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if (hwq->swq_queued >= 4 || list_empty(&hwq->swq))
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break;
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len = mt76_txq_schedule_list(dev, hwq);
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} while (len > 0);
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}
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EXPORT_SYMBOL_GPL(mt76_txq_schedule);
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void mt76_stop_tx_queues(struct mt76_dev *dev, struct ieee80211_sta *sta)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
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struct ieee80211_txq *txq = sta->txq[i];
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struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv;
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spin_lock_bh(&mtxq->hwq->lock);
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mtxq->send_bar = mtxq->aggr;
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if (!list_empty(&mtxq->list))
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list_del_init(&mtxq->list);
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spin_unlock_bh(&mtxq->hwq->lock);
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}
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}
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EXPORT_SYMBOL_GPL(mt76_stop_tx_queues);
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void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
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{
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struct mt76_dev *dev = hw->priv;
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struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv;
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struct mt76_queue *hwq = mtxq->hwq;
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spin_lock_bh(&hwq->lock);
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if (list_empty(&mtxq->list))
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list_add_tail(&mtxq->list, &hwq->swq);
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mt76_txq_schedule(dev, hwq);
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spin_unlock_bh(&hwq->lock);
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}
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EXPORT_SYMBOL_GPL(mt76_wake_tx_queue);
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void mt76_txq_remove(struct mt76_dev *dev, struct ieee80211_txq *txq)
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{
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struct mt76_txq *mtxq;
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struct mt76_queue *hwq;
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struct sk_buff *skb;
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if (!txq)
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return;
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mtxq = (struct mt76_txq *) txq->drv_priv;
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hwq = mtxq->hwq;
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spin_lock_bh(&hwq->lock);
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if (!list_empty(&mtxq->list))
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list_del(&mtxq->list);
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spin_unlock_bh(&hwq->lock);
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while ((skb = skb_dequeue(&mtxq->retry_q)) != NULL)
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ieee80211_free_txskb(dev->hw, skb);
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}
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EXPORT_SYMBOL_GPL(mt76_txq_remove);
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void mt76_txq_init(struct mt76_dev *dev, struct ieee80211_txq *txq)
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{
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struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv;
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INIT_LIST_HEAD(&mtxq->list);
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skb_queue_head_init(&mtxq->retry_q);
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mtxq->hwq = &dev->q_tx[mt76_txq_get_qid(txq)];
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}
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EXPORT_SYMBOL_GPL(mt76_txq_init);
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