mirror of
https://github.com/outbackdingo/mt76.git
synced 2026-10-24 13:26:48 +00:00
350 lines
7.9 KiB
C
350 lines
7.9 KiB
C
/*
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* Copyright (C) 2014 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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struct beacon_bc_data {
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struct mt76_dev *dev;
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struct sk_buff_head q;
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struct sk_buff *tail[8];
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};
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void mt76_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
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struct sk_buff *skb)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct mt76_dev *dev = hw->priv;
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struct ieee80211_vif *vif = info->control.vif;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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struct mt76_sta *msta = NULL;
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struct mt76_wcid *wcid = &mvif->group_wcid;
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struct mt76_queue *q;
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int qid = skb_get_queue_mapping(skb);
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if (WARN_ON(qid >= MT_TXQ_PSD)) {
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qid = MT_TXQ_BE;
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skb_set_queue_mapping(skb, qid);
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}
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if (control->sta) {
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msta = (struct mt76_sta *) control->sta->drv_priv;
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wcid = &msta->wcid;
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}
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if (!wcid->tx_rate_set)
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ieee80211_get_tx_rates(info->control.vif, control->sta, skb,
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info->control.rates, 1);
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q = &dev->q_tx[qid];
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spin_lock_bh(&q->lock);
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mt76_tx_queue_skb(dev, q, skb, wcid, control->sta);
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mt76_kick_queue(dev, q);
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if (q->queued > q->ndesc - 8)
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ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
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spin_unlock_bh(&q->lock);
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}
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void mt76_tx_complete(struct mt76_dev *dev, struct sk_buff *skb)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct mt76_queue *q;
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int qid = skb_get_queue_mapping(skb);
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ieee80211_tx_info_clear_status(info);
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info->status.rates[0].idx = -1;
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info->flags |= IEEE80211_TX_STAT_ACK;
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ieee80211_tx_status(dev->hw, skb);
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q = &dev->q_tx[qid];
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if (q->queued < q->ndesc - 8)
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ieee80211_wake_queue(dev->hw, qid);
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}
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static void
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mt76_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)
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{
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struct mt76_dev *dev = (struct mt76_dev *) priv;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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struct ieee80211_tx_info *info;
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struct sk_buff *skb = NULL;
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if (!(dev->beacon_mask & BIT(mvif->idx)))
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return;
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skb = ieee80211_beacon_get(dev->hw, vif);
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if (!skb)
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return;
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info = IEEE80211_SKB_CB(skb);
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info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
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mt76_mac_set_beacon(dev, mvif->idx, skb);
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}
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static void
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mt76_skb_set_moredata(struct sk_buff *skb, bool enable)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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if (enable)
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hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
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else
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hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
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}
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static void
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mt76_add_buffered_bc(void *priv, u8 *mac, struct ieee80211_vif *vif)
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{
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struct beacon_bc_data *data = priv;
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struct mt76_dev *dev = data->dev;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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struct ieee80211_tx_info *info;
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struct sk_buff *skb;
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if (!(dev->beacon_mask & BIT(mvif->idx)))
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return;
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skb = ieee80211_get_buffered_bc(dev->hw, vif);
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if (!skb)
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return;
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info = IEEE80211_SKB_CB(skb);
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info->control.vif = vif;
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info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
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mt76_skb_set_moredata(skb, true);
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__skb_queue_tail(&data->q, skb);
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data->tail[mvif->idx] = skb;
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}
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void mt76_pre_tbtt_tasklet(unsigned long arg)
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{
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struct mt76_dev *dev = (struct mt76_dev *) arg;
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struct mt76_queue *q = &dev->q_tx[MT_TXQ_PSD];
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struct beacon_bc_data data = {};
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struct sk_buff *skb;
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int i, nframes;
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data.dev = dev;
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__skb_queue_head_init(&data.q);
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ieee80211_iterate_active_interfaces_atomic(dev->hw,
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IEEE80211_IFACE_ITER_RESUME_ALL,
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mt76_update_beacon_iter, dev);
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do {
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nframes = skb_queue_len(&data.q);
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ieee80211_iterate_active_interfaces_atomic(dev->hw,
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IEEE80211_IFACE_ITER_RESUME_ALL,
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mt76_add_buffered_bc, &data);
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} while (nframes != skb_queue_len(&data.q));
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if (!nframes)
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return;
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for (i = 0; i < ARRAY_SIZE(data.tail); i++) {
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if (!data.tail[i])
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continue;
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mt76_skb_set_moredata(data.tail[i], false);
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}
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spin_lock_bh(&q->lock);
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while ((skb = __skb_dequeue(&data.q)) != NULL) {
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_vif *vif = info->control.vif;
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struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
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mt76_tx_queue_skb(dev, q, skb, &mvif->group_wcid, NULL);
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}
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spin_unlock_bh(&q->lock);
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}
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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 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;
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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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if (txq->sta) {
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struct mt76_sta *sta = (struct mt76_sta *) txq->sta->drv_priv;
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wcid = &sta->wcid;
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} else {
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struct mt76_vif *mvif = (struct mt76_vif *) txq->vif->drv_priv;
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wcid = &mvif->group_wcid;
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}
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if (ieee80211_tx_dequeue(dev->hw, txq, &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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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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if (ieee80211_tx_dequeue(dev->hw, txq, &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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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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mt76_kick_queue(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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mtxq_last = list_last_entry(&hwq->swq, struct mt76_txq, list);
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while (1) {
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bool empty = false;
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int cur, len;
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if (hwq->swq_queued >= 4)
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break;
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if (list_empty(&hwq->swq))
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break;
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mtxq = list_first_entry(&hwq->swq, struct mt76_txq, list);
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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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len = mt76_txq_schedule_list(dev, hwq);
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} while (len > 0);
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}
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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;
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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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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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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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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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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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}
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