324 lines
9.1 KiB
C
324 lines
9.1 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
|
||
|
|
* Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2
|
||
|
|
* as published by the Free Software Foundation
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "mt7601u.h"
|
||
|
|
#include "trace.h"
|
||
|
|
|
||
|
|
enum mt76_txq_id {
|
||
|
|
MT_TXQ_VO = IEEE80211_AC_VO,
|
||
|
|
MT_TXQ_VI = IEEE80211_AC_VI,
|
||
|
|
MT_TXQ_BE = IEEE80211_AC_BE,
|
||
|
|
MT_TXQ_BK = IEEE80211_AC_BK,
|
||
|
|
MT_TXQ_PSD,
|
||
|
|
MT_TXQ_MCU,
|
||
|
|
__MT_TXQ_MAX
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Hardware uses mirrored order of queues with Q0 having the highest priority */
|
||
|
|
static u8 q2hwq(u8 q)
|
||
|
|
{
|
||
|
|
return q ^ 0x3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Take mac80211 Q id from the skb and translate it to hardware Q id */
|
||
|
|
static u8 skb2q(struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
int qid = skb_get_queue_mapping(skb);
|
||
|
|
|
||
|
|
if (WARN_ON(qid >= MT_TXQ_PSD)) {
|
||
|
|
qid = MT_TXQ_BE;
|
||
|
|
skb_set_queue_mapping(skb, qid);
|
||
|
|
}
|
||
|
|
|
||
|
|
return q2hwq(qid);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Note: TX retry reporting is a bit broken.
|
||
|
|
* Retries are reported only once per AMPDU and often come a frame early
|
||
|
|
* i.e. they are reported in the last status preceding the AMPDU. Apart
|
||
|
|
* from the fact that it's hard to know the length of the AMPDU (which is
|
||
|
|
* required to know to how many consecutive frames retries should be
|
||
|
|
* applied), if status comes early on full FIFO it gets lost and retries
|
||
|
|
* of the whole AMPDU become invisible.
|
||
|
|
* As a work-around encode the desired rate in PKT_ID of TX descriptor
|
||
|
|
* and based on that guess the retries (every rate is tried once).
|
||
|
|
* Only downside here is that for MCS0 we have to rely solely on
|
||
|
|
* transmission failures as no retries can ever be reported.
|
||
|
|
* Not having to read EXT_FIFO has a nice effect of doubling the number
|
||
|
|
* of reports which can be fetched.
|
||
|
|
* Also the vendor driver never uses the EXT_FIFO register so it may be
|
||
|
|
* undertested.
|
||
|
|
*/
|
||
|
|
static u8 mt7601u_tx_pktid_enc(struct mt7601u_dev *dev, u8 rate, bool is_probe)
|
||
|
|
{
|
||
|
|
u8 encoded = (rate + 1) + is_probe * 8;
|
||
|
|
|
||
|
|
/* Because PKT_ID 0 disables status reporting only 15 values are
|
||
|
|
* available but 16 are needed (8 MCS * 2 for encoding is_probe)
|
||
|
|
* - we need to cram together two rates. MCS0 and MCS7 with is_probe
|
||
|
|
* share PKT_ID 9.
|
||
|
|
*/
|
||
|
|
if (is_probe && rate == 7)
|
||
|
|
return encoded - 7;
|
||
|
|
|
||
|
|
return encoded;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
mt7601u_tx_pktid_dec(struct mt7601u_dev *dev, struct mt76_tx_status *stat)
|
||
|
|
{
|
||
|
|
u8 req_rate = stat->pktid;
|
||
|
|
u8 eff_rate = stat->rate & 0x7;
|
||
|
|
|
||
|
|
req_rate -= 1;
|
||
|
|
|
||
|
|
if (req_rate > 7) {
|
||
|
|
stat->is_probe = true;
|
||
|
|
req_rate -= 8;
|
||
|
|
|
||
|
|
/* Decide between MCS0 and MCS7 which share pktid 9 */
|
||
|
|
if (!req_rate && eff_rate)
|
||
|
|
req_rate = 7;
|
||
|
|
}
|
||
|
|
|
||
|
|
stat->retry = req_rate - eff_rate;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void mt7601u_tx_skb_remove_dma_overhead(struct sk_buff *skb,
|
||
|
|
struct ieee80211_tx_info *info)
|
||
|
|
{
|
||
|
|
int pkt_len = (unsigned long)info->status.status_driver_data[0];
|
||
|
|
|
||
|
|
skb_pull(skb, sizeof(struct mt76_txwi) + 4);
|
||
|
|
if (ieee80211_get_hdrlen_from_skb(skb) % 4)
|
||
|
|
mt76_remove_hdr_pad(skb);
|
||
|
|
|
||
|
|
skb_trim(skb, pkt_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
void mt7601u_tx_status(struct mt7601u_dev *dev, struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
||
|
|
|
||
|
|
mt7601u_tx_skb_remove_dma_overhead(skb, info);
|
||
|
|
|
||
|
|
ieee80211_tx_info_clear_status(info);
|
||
|
|
info->status.rates[0].idx = -1;
|
||
|
|
info->flags |= IEEE80211_TX_STAT_ACK;
|
||
|
|
|
||
|
|
spin_lock_bh(&dev->mac_lock);
|
||
|
|
ieee80211_tx_status(dev->hw, skb);
|
||
|
|
spin_unlock_bh(&dev->mac_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mt7601u_skb_rooms(struct mt7601u_dev *dev, struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
int hdr_len = ieee80211_get_hdrlen_from_skb(skb);
|
||
|
|
u32 need_head;
|
||
|
|
|
||
|
|
need_head = sizeof(struct mt76_txwi) + 4;
|
||
|
|
if (hdr_len % 4)
|
||
|
|
need_head += 2;
|
||
|
|
|
||
|
|
return skb_cow(skb, need_head);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct mt76_txwi *
|
||
|
|
mt7601u_push_txwi(struct mt7601u_dev *dev, struct sk_buff *skb,
|
||
|
|
struct ieee80211_sta *sta, struct mt76_wcid *wcid,
|
||
|
|
int pkt_len)
|
||
|
|
{
|
||
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
||
|
|
struct ieee80211_tx_rate *rate = &info->control.rates[0];
|
||
|
|
struct mt76_txwi *txwi;
|
||
|
|
unsigned long flags;
|
||
|
|
bool is_probe;
|
||
|
|
u32 pkt_id;
|
||
|
|
u16 rate_ctl;
|
||
|
|
u8 nss;
|
||
|
|
|
||
|
|
txwi = (struct mt76_txwi *)skb_push(skb, sizeof(struct mt76_txwi));
|
||
|
|
memset(txwi, 0, sizeof(*txwi));
|
||
|
|
|
||
|
|
if (!wcid->tx_rate_set)
|
||
|
|
ieee80211_get_tx_rates(info->control.vif, sta, skb,
|
||
|
|
info->control.rates, 1);
|
||
|
|
|
||
|
|
spin_lock_irqsave(&dev->lock, flags);
|
||
|
|
if (rate->idx < 0 || !rate->count)
|
||
|
|
rate_ctl = wcid->tx_rate;
|
||
|
|
else
|
||
|
|
rate_ctl = mt76_mac_tx_rate_val(dev, rate, &nss);
|
||
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
||
|
|
txwi->rate_ctl = cpu_to_le16(rate_ctl);
|
||
|
|
|
||
|
|
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
|
||
|
|
txwi->ack_ctl |= MT_TXWI_ACK_CTL_REQ;
|
||
|
|
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
|
||
|
|
txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ;
|
||
|
|
|
||
|
|
if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) {
|
||
|
|
u8 ba_size = IEEE80211_MIN_AMPDU_BUF;
|
||
|
|
|
||
|
|
ba_size <<= sta->ht_cap.ampdu_factor;
|
||
|
|
ba_size = min_t(int, 63, ba_size);
|
||
|
|
if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
|
||
|
|
ba_size = 0;
|
||
|
|
txwi->ack_ctl |= FIELD_PREP(MT_TXWI_ACK_CTL_BA_WINDOW, ba_size);
|
||
|
|
|
||
|
|
txwi->flags =
|
||
|
|
cpu_to_le16(MT_TXWI_FLAGS_AMPDU |
|
||
|
|
FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY,
|
||
|
|
sta->ht_cap.ampdu_density));
|
||
|
|
if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
|
||
|
|
txwi->flags = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
txwi->wcid = wcid->idx;
|
||
|
|
|
||
|
|
is_probe = !!(info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE);
|
||
|
|
pkt_id = mt7601u_tx_pktid_enc(dev, rate_ctl & 0x7, is_probe);
|
||
|
|
pkt_len |= FIELD_PREP(MT_TXWI_LEN_PKTID, pkt_id);
|
||
|
|
txwi->len_ctl = cpu_to_le16(pkt_len);
|
||
|
|
|
||
|
|
return txwi;
|
||
|
|
}
|
||
|
|
|
||
|
|
void mt7601u_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
|
||
|
|
struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
||
|
|
struct mt7601u_dev *dev = hw->priv;
|
||
|
|
struct ieee80211_vif *vif = info->control.vif;
|
||
|
|
struct ieee80211_sta *sta = control->sta;
|
||
|
|
struct mt76_sta *msta = NULL;
|
||
|
|
struct mt76_wcid *wcid = dev->mon_wcid;
|
||
|
|
struct mt76_txwi *txwi;
|
||
|
|
int pkt_len = skb->len;
|
||
|
|
int hw_q = skb2q(skb);
|
||
|
|
|
||
|
|
BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
|
||
|
|
info->status.status_driver_data[0] = (void *)(unsigned long)pkt_len;
|
||
|
|
|
||
|
|
if (mt7601u_skb_rooms(dev, skb) || mt76_insert_hdr_pad(skb)) {
|
||
|
|
ieee80211_free_txskb(dev->hw, skb);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (sta) {
|
||
|
|
msta = (struct mt76_sta *) sta->drv_priv;
|
||
|
|
wcid = &msta->wcid;
|
||
|
|
} else if (vif) {
|
||
|
|
struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv;
|
||
|
|
|
||
|
|
wcid = &mvif->group_wcid;
|
||
|
|
}
|
||
|
|
|
||
|
|
txwi = mt7601u_push_txwi(dev, skb, sta, wcid, pkt_len);
|
||
|
|
|
||
|
|
if (mt7601u_dma_enqueue_tx(dev, skb, wcid, hw_q))
|
||
|
|
return;
|
||
|
|
|
||
|
|
trace_mt_tx(dev, skb, msta, txwi);
|
||
|
|
}
|
||
|
|
|
||
|
|
void mt7601u_tx_stat(struct work_struct *work)
|
||
|
|
{
|
||
|
|
struct mt7601u_dev *dev = container_of(work, struct mt7601u_dev,
|
||
|
|
stat_work.work);
|
||
|
|
struct mt76_tx_status stat;
|
||
|
|
unsigned long flags;
|
||
|
|
int cleaned = 0;
|
||
|
|
|
||
|
|
while (!test_bit(MT7601U_STATE_REMOVED, &dev->state)) {
|
||
|
|
stat = mt7601u_mac_fetch_tx_status(dev);
|
||
|
|
if (!stat.valid)
|
||
|
|
break;
|
||
|
|
|
||
|
|
mt7601u_tx_pktid_dec(dev, &stat);
|
||
|
|
mt76_send_tx_status(dev, &stat);
|
||
|
|
|
||
|
|
cleaned++;
|
||
|
|
}
|
||
|
|
trace_mt_tx_status_cleaned(dev, cleaned);
|
||
|
|
|
||
|
|
spin_lock_irqsave(&dev->tx_lock, flags);
|
||
|
|
if (cleaned)
|
||
|
|
queue_delayed_work(dev->stat_wq, &dev->stat_work,
|
||
|
|
msecs_to_jiffies(10));
|
||
|
|
else if (test_and_clear_bit(MT7601U_STATE_MORE_STATS, &dev->state))
|
||
|
|
queue_delayed_work(dev->stat_wq, &dev->stat_work,
|
||
|
|
msecs_to_jiffies(20));
|
||
|
|
else
|
||
|
|
clear_bit(MT7601U_STATE_READING_STATS, &dev->state);
|
||
|
|
spin_unlock_irqrestore(&dev->tx_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
int mt7601u_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
|
||
|
|
u16 queue, const struct ieee80211_tx_queue_params *params)
|
||
|
|
{
|
||
|
|
struct mt7601u_dev *dev = hw->priv;
|
||
|
|
u8 cw_min = 5, cw_max = 10, hw_q = q2hwq(queue);
|
||
|
|
u32 val;
|
||
|
|
|
||
|
|
/* TODO: should we do funny things with the parameters?
|
||
|
|
* See what mt7601u_set_default_edca() used to do in init.c.
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (params->cw_min)
|
||
|
|
cw_min = fls(params->cw_min);
|
||
|
|
if (params->cw_max)
|
||
|
|
cw_max = fls(params->cw_max);
|
||
|
|
|
||
|
|
WARN_ON(params->txop > 0xff);
|
||
|
|
WARN_ON(params->aifs > 0xf);
|
||
|
|
WARN_ON(cw_min > 0xf);
|
||
|
|
WARN_ON(cw_max > 0xf);
|
||
|
|
|
||
|
|
val = FIELD_PREP(MT_EDCA_CFG_AIFSN, params->aifs) |
|
||
|
|
FIELD_PREP(MT_EDCA_CFG_CWMIN, cw_min) |
|
||
|
|
FIELD_PREP(MT_EDCA_CFG_CWMAX, cw_max);
|
||
|
|
/* TODO: based on user-controlled EnableTxBurst var vendor drv sets
|
||
|
|
* a really long txop on AC0 (see connect.c:2009) but only on
|
||
|
|
* connect? When not connected should be 0.
|
||
|
|
*/
|
||
|
|
if (!hw_q)
|
||
|
|
val |= 0x60;
|
||
|
|
else
|
||
|
|
val |= FIELD_PREP(MT_EDCA_CFG_TXOP, params->txop);
|
||
|
|
mt76_wr(dev, MT_EDCA_CFG_AC(hw_q), val);
|
||
|
|
|
||
|
|
val = mt76_rr(dev, MT_WMM_TXOP(hw_q));
|
||
|
|
val &= ~(MT_WMM_TXOP_MASK << MT_WMM_TXOP_SHIFT(hw_q));
|
||
|
|
val |= params->txop << MT_WMM_TXOP_SHIFT(hw_q);
|
||
|
|
mt76_wr(dev, MT_WMM_TXOP(hw_q), val);
|
||
|
|
|
||
|
|
val = mt76_rr(dev, MT_WMM_AIFSN);
|
||
|
|
val &= ~(MT_WMM_AIFSN_MASK << MT_WMM_AIFSN_SHIFT(hw_q));
|
||
|
|
val |= params->aifs << MT_WMM_AIFSN_SHIFT(hw_q);
|
||
|
|
mt76_wr(dev, MT_WMM_AIFSN, val);
|
||
|
|
|
||
|
|
val = mt76_rr(dev, MT_WMM_CWMIN);
|
||
|
|
val &= ~(MT_WMM_CWMIN_MASK << MT_WMM_CWMIN_SHIFT(hw_q));
|
||
|
|
val |= cw_min << MT_WMM_CWMIN_SHIFT(hw_q);
|
||
|
|
mt76_wr(dev, MT_WMM_CWMIN, val);
|
||
|
|
|
||
|
|
val = mt76_rr(dev, MT_WMM_CWMAX);
|
||
|
|
val &= ~(MT_WMM_CWMAX_MASK << MT_WMM_CWMAX_SHIFT(hw_q));
|
||
|
|
val |= cw_max << MT_WMM_CWMAX_SHIFT(hw_q);
|
||
|
|
mt76_wr(dev, MT_WMM_CWMAX, val);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|