linux/drivers/net/wireless/mediatek/mt7601u/tx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2014 Felix Fietkau <[email protected]>
 * Copyright (C) 2015 Jakub Kicinski <[email protected]>
 */

#include "mt7601u.h"
#include "trace.h"

enum mt76_txq_id { … };

/* Hardware uses mirrored order of queues with Q0 having the highest priority */
static u8 q2hwq(u8 q)
{ … }

/* Take mac80211 Q id from the skb and translate it to hardware Q id */
static u8 skb2q(struct sk_buff *skb)
{ … }

/* 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)
{ … }

static void
mt7601u_tx_pktid_dec(struct mt7601u_dev *dev, struct mt76_tx_status *stat)
{ … }

static void mt7601u_tx_skb_remove_dma_overhead(struct sk_buff *skb,
					       struct ieee80211_tx_info *info)
{ … }

void mt7601u_tx_status(struct mt7601u_dev *dev, struct sk_buff *skb)
{ … }

static int mt7601u_skb_rooms(struct mt7601u_dev *dev, struct sk_buff *skb)
{ … }

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)
{ … }

void mt7601u_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
		struct sk_buff *skb)
{ … }

void mt7601u_tx_stat(struct work_struct *work)
{ … }

int mt7601u_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		    unsigned int link_id, u16 queue,
		    const struct ieee80211_tx_queue_params *params)
{ … }