atheros: put atheros wireless drivers into ath/

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 0 insertions, 2171 deletions

diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
deleted file mode 100644
index 628b780d884..00000000000
--- a/drivers/net/wireless/ath9k/xmit.c
+++ /dev/null
@@ -1,2171 +0,0 @@
-/*
- * Copyright (c) 2008-2009 Atheros Communications Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include "ath9k.h"
-
-#define BITS_PER_BYTE           8
-#define OFDM_PLCP_BITS          22
-#define HT_RC_2_MCS(_rc)        ((_rc) & 0x0f)
-#define HT_RC_2_STREAMS(_rc)    ((((_rc) & 0x78) >> 3) + 1)
-#define L_STF                   8
-#define L_LTF                   8
-#define L_SIG                   4
-#define HT_SIG                  8
-#define HT_STF                  4
-#define HT_LTF(_ns)             (4 * (_ns))
-#define SYMBOL_TIME(_ns)        ((_ns) << 2) /* ns * 4 us */
-#define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5)  /* ns * 3.6 us */
-#define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2)
-#define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18)
-
-#define OFDM_SIFS_TIME    	    16
-
-static u32 bits_per_symbol[][2] = {
-	/* 20MHz 40MHz */
-	{    26,   54 },     /*  0: BPSK */
-	{    52,  108 },     /*  1: QPSK 1/2 */
-	{    78,  162 },     /*  2: QPSK 3/4 */
-	{   104,  216 },     /*  3: 16-QAM 1/2 */
-	{   156,  324 },     /*  4: 16-QAM 3/4 */
-	{   208,  432 },     /*  5: 64-QAM 2/3 */
-	{   234,  486 },     /*  6: 64-QAM 3/4 */
-	{   260,  540 },     /*  7: 64-QAM 5/6 */
-	{    52,  108 },     /*  8: BPSK */
-	{   104,  216 },     /*  9: QPSK 1/2 */
-	{   156,  324 },     /* 10: QPSK 3/4 */
-	{   208,  432 },     /* 11: 16-QAM 1/2 */
-	{   312,  648 },     /* 12: 16-QAM 3/4 */
-	{   416,  864 },     /* 13: 64-QAM 2/3 */
-	{   468,  972 },     /* 14: 64-QAM 3/4 */
-	{   520, 1080 },     /* 15: 64-QAM 5/6 */
-};
-
-#define IS_HT_RATE(_rate)     ((_rate) & 0x80)
-
-static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
-				  struct ath_atx_tid *tid,
-				  struct list_head *bf_head);
-static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
-				struct list_head *bf_q,
-				int txok, int sendbar);
-static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
-			     struct list_head *head);
-static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf);
-static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
-			      int txok);
-static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds,
-			     int nbad, int txok, bool update_rc);
-
-/*********************/
-/* Aggregation logic */
-/*********************/
-
-static int ath_aggr_query(struct ath_softc *sc, struct ath_node *an, u8 tidno)
-{
-	struct ath_atx_tid *tid;
-	tid = ATH_AN_2_TID(an, tidno);
-
-	if (tid->state & AGGR_ADDBA_COMPLETE ||
-	    tid->state & AGGR_ADDBA_PROGRESS)
-		return 1;
-	else
-		return 0;
-}
-
-static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid)
-{
-	struct ath_atx_ac *ac = tid->ac;
-
-	if (tid->paused)
-		return;
-
-	if (tid->sched)
-		return;
-
-	tid->sched = true;
-	list_add_tail(&tid->list, &ac->tid_q);
-
-	if (ac->sched)
-		return;
-
-	ac->sched = true;
-	list_add_tail(&ac->list, &txq->axq_acq);
-}
-
-static void ath_tx_pause_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
-{
-	struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
-
-	spin_lock_bh(&txq->axq_lock);
-	tid->paused++;
-	spin_unlock_bh(&txq->axq_lock);
-}
-
-static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
-{
-	struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
-
-	ASSERT(tid->paused > 0);
-	spin_lock_bh(&txq->axq_lock);
-
-	tid->paused--;
-
-	if (tid->paused > 0)
-		goto unlock;
-
-	if (list_empty(&tid->buf_q))
-		goto unlock;
-
-	ath_tx_queue_tid(txq, tid);
-	ath_txq_schedule(sc, txq);
-unlock:
-	spin_unlock_bh(&txq->axq_lock);
-}
-
-static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
-{
-	struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
-	struct ath_buf *bf;
-	struct list_head bf_head;
-	INIT_LIST_HEAD(&bf_head);
-
-	ASSERT(tid->paused > 0);
-	spin_lock_bh(&txq->axq_lock);
-
-	tid->paused--;
-
-	if (tid->paused > 0) {
-		spin_unlock_bh(&txq->axq_lock);
-		return;
-	}
-
-	while (!list_empty(&tid->buf_q)) {
-		bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
-		ASSERT(!bf_isretried(bf));
-		list_move_tail(&bf->list, &bf_head);
-		ath_tx_send_ht_normal(sc, txq, tid, &bf_head);
-	}
-
-	spin_unlock_bh(&txq->axq_lock);
-}
-
-static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
-			      int seqno)
-{
-	int index, cindex;
-
-	index  = ATH_BA_INDEX(tid->seq_start, seqno);
-	cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
-
-	tid->tx_buf[cindex] = NULL;
-
-	while (tid->baw_head != tid->baw_tail && !tid->tx_buf[tid->baw_head]) {
-		INCR(tid->seq_start, IEEE80211_SEQ_MAX);
-		INCR(tid->baw_head, ATH_TID_MAX_BUFS);
-	}
-}
-
-static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
-			     struct ath_buf *bf)
-{
-	int index, cindex;
-
-	if (bf_isretried(bf))
-		return;
-
-	index  = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno);
-	cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
-
-	ASSERT(tid->tx_buf[cindex] == NULL);
-	tid->tx_buf[cindex] = bf;
-
-	if (index >= ((tid->baw_tail - tid->baw_head) &
-		(ATH_TID_MAX_BUFS - 1))) {
-		tid->baw_tail = cindex;
-		INCR(tid->baw_tail, ATH_TID_MAX_BUFS);
-	}
-}
-
-/*
- * TODO: For frame(s) that are in the retry state, we will reuse the
- * sequence number(s) without setting the retry bit. The
- * alternative is to give up on these and BAR the receiver's window
- * forward.
- */
-static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
-			  struct ath_atx_tid *tid)
-
-{
-	struct ath_buf *bf;
-	struct list_head bf_head;
-	INIT_LIST_HEAD(&bf_head);
-
-	for (;;) {
-		if (list_empty(&tid->buf_q))
-			break;
-
-		bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
-		list_move_tail(&bf->list, &bf_head);
-
-		if (bf_isretried(bf))
-			ath_tx_update_baw(sc, tid, bf->bf_seqno);
-
-		spin_unlock(&txq->axq_lock);
-		ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
-		spin_lock(&txq->axq_lock);
-	}
-
-	tid->seq_next = tid->seq_start;
-	tid->baw_tail = tid->baw_head;
-}
-
-static void ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
-{
-	struct sk_buff *skb;
-	struct ieee80211_hdr *hdr;
-
-	bf->bf_state.bf_type |= BUF_RETRY;
-	bf->bf_retries++;
-
-	skb = bf->bf_mpdu;
-	hdr = (struct ieee80211_hdr *)skb->data;
-	hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY);
-}
-
-static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf)
-{
-	struct ath_buf *tbf;
-
-	spin_lock_bh(&sc->tx.txbuflock);
-	ASSERT(!list_empty((&sc->tx.txbuf)));
-	tbf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list);
-	list_del(&tbf->list);
-	spin_unlock_bh(&sc->tx.txbuflock);
-
-	ATH_TXBUF_RESET(tbf);
-
-	tbf->bf_mpdu = bf->bf_mpdu;
-	tbf->bf_buf_addr = bf->bf_buf_addr;
-	*(tbf->bf_desc) = *(bf->bf_desc);
-	tbf->bf_state = bf->bf_state;
-	tbf->bf_dmacontext = bf->bf_dmacontext;
-
-	return tbf;
-}
-
-static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
-				 struct ath_buf *bf, struct list_head *bf_q,
-				 int txok)
-{
-	struct ath_node *an = NULL;
-	struct sk_buff *skb;
-	struct ieee80211_sta *sta;
-	struct ieee80211_hdr *hdr;
-	struct ath_atx_tid *tid = NULL;
-	struct ath_buf *bf_next, *bf_last = bf->bf_lastbf;
-	struct ath_desc *ds = bf_last->bf_desc;
-	struct list_head bf_head, bf_pending;
-	u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0;
-	u32 ba[WME_BA_BMP_SIZE >> 5];
-	int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0;
-	bool rc_update = true;
-
-	skb = bf->bf_mpdu;
-	hdr = (struct ieee80211_hdr *)skb->data;
-
-	rcu_read_lock();
-
-	sta = ieee80211_find_sta(sc->hw, hdr->addr1);
-	if (!sta) {
-		rcu_read_unlock();
-		return;
-	}
-
-	an = (struct ath_node *)sta->drv_priv;
-	tid = ATH_AN_2_TID(an, bf->bf_tidno);
-
-	isaggr = bf_isaggr(bf);
-	memset(ba, 0, WME_BA_BMP_SIZE >> 3);
-
-	if (isaggr && txok) {
-		if (ATH_DS_TX_BA(ds)) {
-			seq_st = ATH_DS_BA_SEQ(ds);
-			memcpy(ba, ATH_DS_BA_BITMAP(ds),
-			       WME_BA_BMP_SIZE >> 3);
-		} else {
-			/*
-			 * AR5416 can become deaf/mute when BA
-			 * issue happens. Chip needs to be reset.
-			 * But AP code may have sychronization issues
-			 * when perform internal reset in this routine.
-			 * Only enable reset in STA mode for now.
-			 */
-			if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION)
-				needreset = 1;
-		}
-	}
-
-	INIT_LIST_HEAD(&bf_pending);
-	INIT_LIST_HEAD(&bf_head);
-
-	nbad = ath_tx_num_badfrms(sc, bf, txok);
-	while (bf) {
-		txfail = txpending = 0;
-		bf_next = bf->bf_next;
-
-		if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) {
-			/* transmit completion, subframe is
-			 * acked by block ack */
-			acked_cnt++;
-		} else if (!isaggr && txok) {
-			/* transmit completion */
-			acked_cnt++;
-		} else {
-			if (!(tid->state & AGGR_CLEANUP) &&
-			    ds->ds_txstat.ts_flags != ATH9K_TX_SW_ABORTED) {
-				if (bf->bf_retries < ATH_MAX_SW_RETRIES) {
-					ath_tx_set_retry(sc, bf);
-					txpending = 1;
-				} else {
-					bf->bf_state.bf_type |= BUF_XRETRY;
-					txfail = 1;
-					sendbar = 1;
-					txfail_cnt++;
-				}
-			} else {
-				/*
-				 * cleanup in progress, just fail
-				 * the un-acked sub-frames
-				 */
-				txfail = 1;
-			}
-		}
-
-		if (bf_next == NULL) {
-			INIT_LIST_HEAD(&bf_head);
-		} else {
-			ASSERT(!list_empty(bf_q));
-			list_move_tail(&bf->list, &bf_head);
-		}
-
-		if (!txpending) {
-			/*
-			 * complete the acked-ones/xretried ones; update
-			 * block-ack window
-			 */
-			spin_lock_bh(&txq->axq_lock);
-			ath_tx_update_baw(sc, tid, bf->bf_seqno);
-			spin_unlock_bh(&txq->axq_lock);
-
-			if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
-				ath_tx_rc_status(bf, ds, nbad, txok, true);
-				rc_update = false;
-			} else {
-				ath_tx_rc_status(bf, ds, nbad, txok, false);
-			}
-
-			ath_tx_complete_buf(sc, bf, &bf_head, !txfail, sendbar);
-		} else {
-			/* retry the un-acked ones */
-			if (bf->bf_next == NULL && bf_last->bf_stale) {
-				struct ath_buf *tbf;
-
-				tbf = ath_clone_txbuf(sc, bf_last);
-				ath9k_hw_cleartxdesc(sc->sc_ah, tbf->bf_desc);
-				list_add_tail(&tbf->list, &bf_head);
-			} else {
-				/*
-				 * Clear descriptor status words for
-				 * software retry
-				 */
-				ath9k_hw_cleartxdesc(sc->sc_ah, bf->bf_desc);
-			}
-
-			/*
-			 * Put this buffer to the temporary pending
-			 * queue to retain ordering
-			 */
-			list_splice_tail_init(&bf_head, &bf_pending);
-		}
-
-		bf = bf_next;
-	}
-
-	if (tid->state & AGGR_CLEANUP) {
-		if (tid->baw_head == tid->baw_tail) {
-			tid->state &= ~AGGR_ADDBA_COMPLETE;
-			tid->addba_exchangeattempts = 0;
-			tid->state &= ~AGGR_CLEANUP;
-
-			/* send buffered frames as singles */
-			ath_tx_flush_tid(sc, tid);
-		}
-		rcu_read_unlock();
-		return;
-	}
-
-	/* prepend un-acked frames to the beginning of the pending frame queue */
-	if (!list_empty(&bf_pending)) {
-		spin_lock_bh(&txq->axq_lock);
-		list_splice(&bf_pending, &tid->buf_q);
-		ath_tx_queue_tid(txq, tid);
-		spin_unlock_bh(&txq->axq_lock);
-	}
-
-	rcu_read_unlock();
-
-	if (needreset)
-		ath_reset(sc, false);
-}
-
-static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
-			   struct ath_atx_tid *tid)
-{
-	struct ath_rate_table *rate_table = sc->cur_rate_table;
-	struct sk_buff *skb;
-	struct ieee80211_tx_info *tx_info;
-	struct ieee80211_tx_rate *rates;
-	struct ath_tx_info_priv *tx_info_priv;
-	u32 max_4ms_framelen, frmlen;
-	u16 aggr_limit, legacy = 0, maxampdu;
-	int i;
-
-	skb = bf->bf_mpdu;
-	tx_info = IEEE80211_SKB_CB(skb);
-	rates = tx_info->control.rates;
-	tx_info_priv = (struct ath_tx_info_priv *)tx_info->rate_driver_data[0];
-
-	/*
-	 * Find the lowest frame length among the rate series that will have a
-	 * 4ms transmit duration.
-	 * TODO - TXOP limit needs to be considered.
-	 */
-	max_4ms_framelen = ATH_AMPDU_LIMIT_MAX;
-
-	for (i = 0; i < 4; i++) {
-		if (rates[i].count) {
-			if (!WLAN_RC_PHY_HT(rate_table->info[rates[i].idx].phy)) {
-				legacy = 1;
-				break;
-			}
-
-			frmlen = rate_table->info[rates[i].idx].max_4ms_framelen;
-			max_4ms_framelen = min(max_4ms_framelen, frmlen);
-		}
-	}
-
-	/*
-	 * limit aggregate size by the minimum rate if rate selected is
-	 * not a probe rate, if rate selected is a probe rate then
-	 * avoid aggregation of this packet.
-	 */
-	if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy)
-		return 0;
-
-	aggr_limit = min(max_4ms_framelen, (u32)ATH_AMPDU_LIMIT_DEFAULT);
-
-	/*
-	 * h/w can accept aggregates upto 16 bit lengths (65535).
-	 * The IE, however can hold upto 65536, which shows up here
-	 * as zero. Ignore 65536 since we  are constrained by hw.
-	 */
-	maxampdu = tid->an->maxampdu;
-	if (maxampdu)
-		aggr_limit = min(aggr_limit, maxampdu);
-
-	return aggr_limit;
-}
-
-/*
- * Returns the number of delimiters to be added to
- * meet the minimum required mpdudensity.
- * caller should make sure that the rate is HT rate .
- */
-static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid,
-				  struct ath_buf *bf, u16 frmlen)
-{
-	struct ath_rate_table *rt = sc->cur_rate_table;
-	struct sk_buff *skb = bf->bf_mpdu;
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	u32 nsymbits, nsymbols, mpdudensity;
-	u16 minlen;
-	u8 rc, flags, rix;
-	int width, half_gi, ndelim, mindelim;
-
-	/* Select standard number of delimiters based on frame length alone */
-	ndelim = ATH_AGGR_GET_NDELIM(frmlen);
-
-	/*
-	 * If encryption enabled, hardware requires some more padding between
-	 * subframes.
-	 * TODO - this could be improved to be dependent on the rate.
-	 *      The hardware can keep up at lower rates, but not higher rates
-	 */
-	if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR)
-		ndelim += ATH_AGGR_ENCRYPTDELIM;
-
-	/*
-	 * Convert desired mpdu density from microeconds to bytes based
-	 * on highest rate in rate series (i.e. first rate) to determine
-	 * required minimum length for subframe. Take into account
-	 * whether high rate is 20 or 40Mhz and half or full GI.
-	 */
-	mpdudensity = tid->an->mpdudensity;
-
-	/*
-	 * If there is no mpdu density restriction, no further calculation
-	 * is needed.
-	 */
-	if (mpdudensity == 0)
-		return ndelim;
-
-	rix = tx_info->control.rates[0].idx;
-	flags = tx_info->control.rates[0].flags;
-	rc = rt->info[rix].ratecode;
-	width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0;
-	half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0;
-
-	if (half_gi)
-		nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(mpdudensity);
-	else
-		nsymbols = NUM_SYMBOLS_PER_USEC(mpdudensity);
-
-	if (nsymbols == 0)
-		nsymbols = 1;
-
-	nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width];
-	minlen = (nsymbols * nsymbits) / BITS_PER_BYTE;
-
-	if (frmlen < minlen) {
-		mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ;
-		ndelim = max(mindelim, ndelim);
-	}
-
-	return ndelim;
-}
-
-static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
-					     struct ath_atx_tid *tid,
-					     struct list_head *bf_q)
-{
-#define PADBYTES(_len) ((4 - ((_len) % 4)) % 4)
-	struct ath_buf *bf, *bf_first, *bf_prev = NULL;
-	int rl = 0, nframes = 0, ndelim, prev_al = 0;
-	u16 aggr_limit = 0, al = 0, bpad = 0,
-		al_delta, h_baw = tid->baw_size / 2;
-	enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
-
-	bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list);
-
-	do {
-		bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
-
-		/* do not step over block-ack window */
-		if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) {
-			status = ATH_AGGR_BAW_CLOSED;
-			break;
-		}
-
-		if (!rl) {
-			aggr_limit = ath_lookup_rate(sc, bf, tid);
-			rl = 1;
-		}
-
-		/* do not exceed aggregation limit */
-		al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen;
-
-		if (nframes &&
-		    (aggr_limit < (al + bpad + al_delta + prev_al))) {
-			status = ATH_AGGR_LIMITED;
-			break;
-		}
-
-		/* do not exceed subframe limit */
-		if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) {
-			status = ATH_AGGR_LIMITED;
-			break;
-		}
-		nframes++;
-
-		/* add padding for previous frame to aggregation length */
-		al += bpad + al_delta;
-
-		/*
-		 * Get the delimiters needed to meet the MPDU
-		 * density for this node.
-		 */
-		ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen);
-		bpad = PADBYTES(al_delta) + (ndelim << 2);
-
-		bf->bf_next = NULL;
-		bf->bf_desc->ds_link = 0;
-
-		/* link buffers of this frame to the aggregate */
-		ath_tx_addto_baw(sc, tid, bf);
-		ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim);
-		list_move_tail(&bf->list, bf_q);
-		if (bf_prev) {
-			bf_prev->bf_next = bf;
-			bf_prev->bf_desc->ds_link = bf->bf_daddr;
-		}
-		bf_prev = bf;
-	} while (!list_empty(&tid->buf_q));
-
-	bf_first->bf_al = al;
-	bf_first->bf_nframes = nframes;
-
-	return status;
-#undef PADBYTES
-}
-
-static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
-			      struct ath_atx_tid *tid)
-{
-	struct ath_buf *bf;
-	enum ATH_AGGR_STATUS status;
-	struct list_head bf_q;
-
-	do {
-		if (list_empty(&tid->buf_q))
-			return;
-
-		INIT_LIST_HEAD(&bf_q);
-
-		status = ath_tx_form_aggr(sc, tid, &bf_q);
-
-		/*
-		 * no frames picked up to be aggregated;
-		 * block-ack window is not open.
-		 */
-		if (list_empty(&bf_q))
-			break;
-
-		bf = list_first_entry(&bf_q, struct ath_buf, list);
-		bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list);
-
-		/* if only one frame, send as non-aggregate */
-		if (bf->bf_nframes == 1) {
-			bf->bf_state.bf_type &= ~BUF_AGGR;
-			ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc);
-			ath_buf_set_rate(sc, bf);
-			ath_tx_txqaddbuf(sc, txq, &bf_q);
-			continue;
-		}
-
-		/* setup first desc of aggregate */
-		bf->bf_state.bf_type |= BUF_AGGR;
-		ath_buf_set_rate(sc, bf);
-		ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al);
-
-		/* anchor last desc of aggregate */
-		ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc);
-
-		txq->axq_aggr_depth++;
-		ath_tx_txqaddbuf(sc, txq, &bf_q);
-
-	} while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH &&
-		 status != ATH_AGGR_BAW_CLOSED);
-}
-
-int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
-		      u16 tid, u16 *ssn)
-{
-	struct ath_atx_tid *txtid;
-	struct ath_node *an;
-
-	an = (struct ath_node *)sta->drv_priv;
-
-	if (sc->sc_flags & SC_OP_TXAGGR) {
-		txtid = ATH_AN_2_TID(an, tid);
-		txtid->state |= AGGR_ADDBA_PROGRESS;
-		ath_tx_pause_tid(sc, txtid);
-		*ssn = txtid->seq_start;
-	}
-
-	return 0;
-}
-
-int ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
-{
-	struct ath_node *an = (struct ath_node *)sta->drv_priv;
-	struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid);
-	struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum];
-	struct ath_buf *bf;
-	struct list_head bf_head;
-	INIT_LIST_HEAD(&bf_head);
-
-	if (txtid->state & AGGR_CLEANUP)
-		return 0;
-
-	if (!(txtid->state & AGGR_ADDBA_COMPLETE)) {
-		txtid->addba_exchangeattempts = 0;
-		return 0;
-	}
-
-	ath_tx_pause_tid(sc, txtid);
-
-	/* drop all software retried frames and mark this TID */
-	spin_lock_bh(&txq->axq_lock);
-	while (!list_empty(&txtid->buf_q)) {
-		bf = list_first_entry(&txtid->buf_q, struct ath_buf, list);
-		if (!bf_isretried(bf)) {
-			/*
-			 * NB: it's based on the assumption that
-			 * software retried frame will always stay
-			 * at the head of software queue.
-			 */
-			break;
-		}
-		list_move_tail(&bf->list, &bf_head);
-		ath_tx_update_baw(sc, txtid, bf->bf_seqno);
-		ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
-	}
-	spin_unlock_bh(&txq->axq_lock);
-
-	if (txtid->baw_head != txtid->baw_tail) {
-		txtid->state |= AGGR_CLEANUP;
-	} else {
-		txtid->state &= ~AGGR_ADDBA_COMPLETE;
-		txtid->addba_exchangeattempts = 0;
-		ath_tx_flush_tid(sc, txtid);
-	}
-
-	return 0;
-}
-
-void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
-{
-	struct ath_atx_tid *txtid;
-	struct ath_node *an;
-
-	an = (struct ath_node *)sta->drv_priv;
-
-	if (sc->sc_flags & SC_OP_TXAGGR) {
-		txtid = ATH_AN_2_TID(an, tid);
-		txtid->baw_size =
-			IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor;
-		txtid->state |= AGGR_ADDBA_COMPLETE;
-		txtid->state &= ~AGGR_ADDBA_PROGRESS;
-		ath_tx_resume_tid(sc, txtid);
-	}
-}
-
-bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno)
-{
-	struct ath_atx_tid *txtid;
-
-	if (!(sc->sc_flags & SC_OP_TXAGGR))
-		return false;
-
-	txtid = ATH_AN_2_TID(an, tidno);
-
-	if (!(txtid->state & AGGR_ADDBA_COMPLETE)) {
-		if (!(txtid->state & AGGR_ADDBA_PROGRESS) &&
-		    (txtid->addba_exchangeattempts < ADDBA_EXCHANGE_ATTEMPTS)) {
-			txtid->addba_exchangeattempts++;
-			return true;
-		}
-	}
-
-	return false;
-}
-
-/********************/
-/* Queue Management */
-/********************/
-
-static void ath_txq_drain_pending_buffers(struct ath_softc *sc,
-					  struct ath_txq *txq)
-{
-	struct ath_atx_ac *ac, *ac_tmp;
-	struct ath_atx_tid *tid, *tid_tmp;
-
-	list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) {
-		list_del(&ac->list);
-		ac->sched = false;
-		list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) {
-			list_del(&tid->list);
-			tid->sched = false;
-			ath_tid_drain(sc, txq, tid);
-		}
-	}
-}
-
-struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
-{
-	struct ath_hw *ah = sc->sc_ah;
-	struct ath9k_tx_queue_info qi;
-	int qnum;
-
-	memset(&qi, 0, sizeof(qi));
-	qi.tqi_subtype = subtype;
-	qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT;
-	qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT;
-	qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT;
-	qi.tqi_physCompBuf = 0;
-
-	/*
-	 * Enable interrupts only for EOL and DESC conditions.
-	 * We mark tx descriptors to receive a DESC interrupt
-	 * when a tx queue gets deep; otherwise waiting for the
-	 * EOL to reap descriptors.  Note that this is done to
-	 * reduce interrupt load and this only defers reaping
-	 * descriptors, never transmitting frames.  Aside from
-	 * reducing interrupts this also permits more concurrency.
-	 * The only potential downside is if the tx queue backs
-	 * up in which case the top half of the kernel may backup
-	 * due to a lack of tx descriptors.
-	 *
-	 * The UAPSD queue is an exception, since we take a desc-
-	 * based intr on the EOSP frames.
-	 */
-	if (qtype == ATH9K_TX_QUEUE_UAPSD)
-		qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE;
-	else
-		qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE |
-			TXQ_FLAG_TXDESCINT_ENABLE;
-	qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi);
-	if (qnum == -1) {
-		/*
-		 * NB: don't print a message, this happens
-		 * normally on parts with too few tx queues
-		 */
-		return NULL;
-	}
-	if (qnum >= ARRAY_SIZE(sc->tx.txq)) {
-		DPRINTF(sc, ATH_DBG_FATAL,
-			"qnum %u out of range, max %u!\n",
-			qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq));
-		ath9k_hw_releasetxqueue(ah, qnum);
-		return NULL;
-	}
-	if (!ATH_TXQ_SETUP(sc, qnum)) {
-		struct ath_txq *txq = &sc->tx.txq[qnum];
-
-		txq->axq_qnum = qnum;
-		txq->axq_link = NULL;
-		INIT_LIST_HEAD(&txq->axq_q);
-		INIT_LIST_HEAD(&txq->axq_acq);
-		spin_lock_init(&txq->axq_lock);
-		txq->axq_depth = 0;
-		txq->axq_aggr_depth = 0;
-		txq->axq_totalqueued = 0;
-		txq->axq_linkbuf = NULL;
-		sc->tx.txqsetup |= 1<<qnum;
-	}
-	return &sc->tx.txq[qnum];
-}
-
-static int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
-{
-	int qnum;
-
-	switch (qtype) {
-	case ATH9K_TX_QUEUE_DATA:
-		if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) {
-			DPRINTF(sc, ATH_DBG_FATAL,
-				"HAL AC %u out of range, max %zu!\n",
-				haltype, ARRAY_SIZE(sc->tx.hwq_map));
-			return -1;
-		}
-		qnum = sc->tx.hwq_map[haltype];
-		break;
-	case ATH9K_TX_QUEUE_BEACON:
-		qnum = sc->beacon.beaconq;
-		break;
-	case ATH9K_TX_QUEUE_CAB:
-		qnum = sc->beacon.cabq->axq_qnum;
-		break;
-	default:
-		qnum = -1;
-	}
-	return qnum;
-}
-
-struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb)
-{
-	struct ath_txq *txq = NULL;
-	int qnum;
-
-	qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
-	txq = &sc->tx.txq[qnum];
-
-	spin_lock_bh(&txq->axq_lock);
-
-	if (txq->axq_depth >= (ATH_TXBUF - 20)) {
-		DPRINTF(sc, ATH_DBG_XMIT,
-			"TX queue: %d is full, depth: %d\n",
-			qnum, txq->axq_depth);
-		ieee80211_stop_queue(sc->hw, skb_get_queue_mapping(skb));
-		txq->stopped = 1;
-		spin_unlock_bh(&txq->axq_lock);
-		return NULL;
-	}
-
-	spin_unlock_bh(&txq->axq_lock);
-
-	return txq;
-}
-
-int ath_txq_update(struct ath_softc *sc, int qnum,
-		   struct ath9k_tx_queue_info *qinfo)
-{
-	struct ath_hw *ah = sc->sc_ah;
-	int error = 0;
-	struct ath9k_tx_queue_info qi;
-
-	if (qnum == sc->beacon.beaconq) {
-		/*
-		 * XXX: for beacon queue, we just save the parameter.
-		 * It will be picked up by ath_beaconq_config when
-		 * it's necessary.
-		 */
-		sc->beacon.beacon_qi = *qinfo;
-		return 0;
-	}
-
-	ASSERT(sc->tx.txq[qnum].axq_qnum == qnum);
-
-	ath9k_hw_get_txq_props(ah, qnum, &qi);
-	qi.tqi_aifs = qinfo->tqi_aifs;
-	qi.tqi_cwmin = qinfo->tqi_cwmin;
-	qi.tqi_cwmax = qinfo->tqi_cwmax;
-	qi.tqi_burstTime = qinfo->tqi_burstTime;
-	qi.tqi_readyTime = qinfo->tqi_readyTime;
-
-	if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) {
-		DPRINTF(sc, ATH_DBG_FATAL,
-			"Unable to update hardware queue %u!\n", qnum);
-		error = -EIO;
-	} else {
-		ath9k_hw_resettxqueue(ah, qnum);
-	}
-
-	return error;
-}
-
-int ath_cabq_update(struct ath_softc *sc)
-{
-	struct ath9k_tx_queue_info qi;
-	int qnum = sc->beacon.cabq->axq_qnum;
-
-	ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi);
-	/*
-	 * Ensure the readytime % is within the bounds.
-	 */
-	if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND)
-		sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND;
-	else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND)
-		sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND;
-
-	qi.tqi_readyTime = (sc->hw->conf.beacon_int *
-			    sc->config.cabqReadytime) / 100;
-	ath_txq_update(sc, qnum, &qi);
-
-	return 0;
-}
-
-/*
- * Drain a given TX queue (could be Beacon or Data)
- *
- * This assumes output has been stopped and
- * we do not need to block ath_tx_tasklet.
- */
-void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx)
-{
-	struct ath_buf *bf, *lastbf;
-	struct list_head bf_head;
-
-	INIT_LIST_HEAD(&bf_head);
-
-	for (;;) {
-		spin_lock_bh(&txq->axq_lock);
-
-		if (list_empty(&txq->axq_q)) {
-			txq->axq_link = NULL;
-			txq->axq_linkbuf = NULL;
-			spin_unlock_bh(&txq->axq_lock);
-			break;
-		}
-
-		bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
-
-		if (bf->bf_stale) {
-			list_del(&bf->list);
-			spin_unlock_bh(&txq->axq_lock);
-
-			spin_lock_bh(&sc->tx.txbuflock);
-			list_add_tail(&bf->list, &sc->tx.txbuf);
-			spin_unlock_bh(&sc->tx.txbuflock);
-			continue;
-		}
-
-		lastbf = bf->bf_lastbf;
-		if (!retry_tx)
-			lastbf->bf_desc->ds_txstat.ts_flags =
-				ATH9K_TX_SW_ABORTED;
-
-		/* remove ath_buf's of the same mpdu from txq */
-		list_cut_position(&bf_head, &txq->axq_q, &lastbf->list);
-		txq->axq_depth--;
-
-		spin_unlock_bh(&txq->axq_lock);
-
-		if (bf_isampdu(bf))
-			ath_tx_complete_aggr(sc, txq, bf, &bf_head, 0);
-		else
-			ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
-	}
-
-	/* flush any pending frames if aggregation is enabled */
-	if (sc->sc_flags & SC_OP_TXAGGR) {
-		if (!retry_tx) {
-			spin_lock_bh(&txq->axq_lock);
-			ath_txq_drain_pending_buffers(sc, txq);
-			spin_unlock_bh(&txq->axq_lock);
-		}
-	}
-}
-
-void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx)
-{
-	struct ath_hw *ah = sc->sc_ah;
-	struct ath_txq *txq;
-	int i, npend = 0;
-
-	if (sc->sc_flags & SC_OP_INVALID)
-		return;
-
-	/* Stop beacon queue */
-	ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
-
-	/* Stop data queues */
-	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
-		if (ATH_TXQ_SETUP(sc, i)) {
-			txq = &sc->tx.txq[i];
-			ath9k_hw_stoptxdma(ah, txq->axq_qnum);
-			npend += ath9k_hw_numtxpending(ah, txq->axq_qnum);
-		}
-	}
-
-	if (npend) {
-		int r;
-
-		DPRINTF(sc, ATH_DBG_XMIT, "Unable to stop TxDMA. Reset HAL!\n");
-
-		spin_lock_bh(&sc->sc_resetlock);
-		r = ath9k_hw_reset(ah, sc->sc_ah->curchan, true);
-		if (r)
-			DPRINTF(sc, ATH_DBG_FATAL,
-				"Unable to reset hardware; reset status %u\n",
-				r);
-		spin_unlock_bh(&sc->sc_resetlock);
-	}
-
-	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
-		if (ATH_TXQ_SETUP(sc, i))
-			ath_draintxq(sc, &sc->tx.txq[i], retry_tx);
-	}
-}
-
-void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq)
-{
-	ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum);
-	sc->tx.txqsetup &= ~(1<<txq->axq_qnum);
-}
-
-void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
-{
-	struct ath_atx_ac *ac;
-	struct ath_atx_tid *tid;
-
-	if (list_empty(&txq->axq_acq))
-		return;
-
-	ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list);
-	list_del(&ac->list);
-	ac->sched = false;
-
-	do {
-		if (list_empty(&ac->tid_q))
-			return;
-
-		tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list);
-		list_del(&tid->list);
-		tid->sched = false;
-
-		if (tid->paused)
-			continue;
-
-		if ((txq->axq_depth % 2) == 0)
-			ath_tx_sched_aggr(sc, txq, tid);
-
-		/*
-		 * add tid to round-robin queue if more frames
-		 * are pending for the tid
-		 */
-		if (!list_empty(&tid->buf_q))
-			ath_tx_queue_tid(txq, tid);
-
-		break;
-	} while (!list_empty(&ac->tid_q));
-
-	if (!list_empty(&ac->tid_q)) {
-		if (!ac->sched) {
-			ac->sched = true;
-			list_add_tail(&ac->list, &txq->axq_acq);
-		}
-	}
-}
-
-int ath_tx_setup(struct ath_softc *sc, int haltype)
-{
-	struct ath_txq *txq;
-
-	if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) {
-		DPRINTF(sc, ATH_DBG_FATAL,
-			"HAL AC %u out of range, max %zu!\n",
-			 haltype, ARRAY_SIZE(sc->tx.hwq_map));
-		return 0;
-	}
-	txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype);
-	if (txq != NULL) {
-		sc->tx.hwq_map[haltype] = txq->axq_qnum;
-		return 1;
-	} else
-		return 0;
-}
-
-/***********/
-/* TX, DMA */
-/***********/
-
-/*
- * Insert a chain of ath_buf (descriptors) on a txq and
- * assume the descriptors are already chained together by caller.
- */
-static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
-			     struct list_head *head)
-{
-	struct ath_hw *ah = sc->sc_ah;
-	struct ath_buf *bf;
-
-	/*
-	 * Insert the frame on the outbound list and
-	 * pass it on to the hardware.
-	 */
-
-	if (list_empty(head))
-		return;
-
-	bf = list_first_entry(head, struct ath_buf, list);
-
-	list_splice_tail_init(head, &txq->axq_q);
-	txq->axq_depth++;
-	txq->axq_totalqueued++;
-	txq->axq_linkbuf = list_entry(txq->axq_q.prev, struct ath_buf, list);
-
-	DPRINTF(sc, ATH_DBG_QUEUE,
-		"qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth);
-
-	if (txq->axq_link == NULL) {
-		ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr);
-		DPRINTF(sc, ATH_DBG_XMIT,
-			"TXDP[%u] = %llx (%p)\n",
-			txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc);
-	} else {
-		*txq->axq_link = bf->bf_daddr;
-		DPRINTF(sc, ATH_DBG_XMIT, "link[%u] (%p)=%llx (%p)\n",
-			txq->axq_qnum, txq->axq_link,
-			ito64(bf->bf_daddr), bf->bf_desc);
-	}
-	txq->axq_link = &(bf->bf_lastbf->bf_desc->ds_link);
-	ath9k_hw_txstart(ah, txq->axq_qnum);
-}
-
-static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc)
-{
-	struct ath_buf *bf = NULL;
-
-	spin_lock_bh(&sc->tx.txbuflock);
-
-	if (unlikely(list_empty(&sc->tx.txbuf))) {
-		spin_unlock_bh(&sc->tx.txbuflock);
-		return NULL;
-	}
-
-	bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list);
-	list_del(&bf->list);
-
-	spin_unlock_bh(&sc->tx.txbuflock);
-
-	return bf;
-}
-
-static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid,
-			      struct list_head *bf_head,
-			      struct ath_tx_control *txctl)
-{
-	struct ath_buf *bf;
-
-	bf = list_first_entry(bf_head, struct ath_buf, list);
-	bf->bf_state.bf_type |= BUF_AMPDU;
-
-	/*
-	 * Do not queue to h/w when any of the following conditions is true:
-	 * - there are pending frames in software queue
-	 * - the TID is currently paused for ADDBA/BAR request
-	 * - seqno is not within block-ack window
-	 * - h/w queue depth exceeds low water mark
-	 */
-	if (!list_empty(&tid->buf_q) || tid->paused ||
-	    !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) ||
-	    txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) {
-		/*
-		 * Add this frame to software queue for scheduling later
-		 * for aggregation.
-		 */
-		list_move_tail(&bf->list, &tid->buf_q);
-		ath_tx_queue_tid(txctl->txq, tid);
-		return;
-	}
-
-	/* Add sub-frame to BAW */
-	ath_tx_addto_baw(sc, tid, bf);
-
-	/* Queue to h/w without aggregation */
-	bf->bf_nframes = 1;
-	bf->bf_lastbf = bf;
-	ath_buf_set_rate(sc, bf);
-	ath_tx_txqaddbuf(sc, txctl->txq, bf_head);
-}
-
-static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq,
-				  struct ath_atx_tid *tid,
-				  struct list_head *bf_head)
-{
-	struct ath_buf *bf;
-
-	bf = list_first_entry(bf_head, struct ath_buf, list);
-	bf->bf_state.bf_type &= ~BUF_AMPDU;
-
-	/* update starting sequence number for subsequent ADDBA request */
-	INCR(tid->seq_start, IEEE80211_SEQ_MAX);
-
-	bf->bf_nframes = 1;
-	bf->bf_lastbf = bf;
-	ath_buf_set_rate(sc, bf);
-	ath_tx_txqaddbuf(sc, txq, bf_head);
-}
-
-static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq,
-			       struct list_head *bf_head)
-{
-	struct ath_buf *bf;
-
-	bf = list_first_entry(bf_head, struct ath_buf, list);
-
-	bf->bf_lastbf = bf;
-	bf->bf_nframes = 1;
-	ath_buf_set_rate(sc, bf);
-	ath_tx_txqaddbuf(sc, txq, bf_head);
-}
-
-static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
-{
-	struct ieee80211_hdr *hdr;
-	enum ath9k_pkt_type htype;
-	__le16 fc;
-
-	hdr = (struct ieee80211_hdr *)skb->data;
-	fc = hdr->frame_control;
-
-	if (ieee80211_is_beacon(fc))
-		htype = ATH9K_PKT_TYPE_BEACON;
-	else if (ieee80211_is_probe_resp(fc))
-		htype = ATH9K_PKT_TYPE_PROBE_RESP;
-	else if (ieee80211_is_atim(fc))
-		htype = ATH9K_PKT_TYPE_ATIM;
-	else if (ieee80211_is_pspoll(fc))
-		htype = ATH9K_PKT_TYPE_PSPOLL;
-	else
-		htype = ATH9K_PKT_TYPE_NORMAL;
-
-	return htype;
-}
-
-static bool is_pae(struct sk_buff *skb)
-{
-	struct ieee80211_hdr *hdr;
-	__le16 fc;
-
-	hdr = (struct ieee80211_hdr *)skb->data;
-	fc = hdr->frame_control;
-
-	if (ieee80211_is_data(fc)) {
-		if (ieee80211_is_nullfunc(fc) ||
-		    /* Port Access Entity (IEEE 802.1X) */
-		    (skb->protocol == cpu_to_be16(ETH_P_PAE))) {
-			return true;
-		}
-	}
-
-	return false;
-}
-
-static int get_hw_crypto_keytype(struct sk_buff *skb)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-
-	if (tx_info->control.hw_key) {
-		if (tx_info->control.hw_key->alg == ALG_WEP)
-			return ATH9K_KEY_TYPE_WEP;
-		else if (tx_info->control.hw_key->alg == ALG_TKIP)
-			return ATH9K_KEY_TYPE_TKIP;
-		else if (tx_info->control.hw_key->alg == ALG_CCMP)
-			return ATH9K_KEY_TYPE_AES;
-	}
-
-	return ATH9K_KEY_TYPE_CLEAR;
-}
-
-static void assign_aggr_tid_seqno(struct sk_buff *skb,
-				  struct ath_buf *bf)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_hdr *hdr;
-	struct ath_node *an;
-	struct ath_atx_tid *tid;
-	__le16 fc;
-	u8 *qc;
-
-	if (!tx_info->control.sta)
-		return;
-
-	an = (struct ath_node *)tx_info->control.sta->drv_priv;
-	hdr = (struct ieee80211_hdr *)skb->data;
-	fc = hdr->frame_control;
-
-	if (ieee80211_is_data_qos(fc)) {
-		qc = ieee80211_get_qos_ctl(hdr);
-		bf->bf_tidno = qc[0] & 0xf;
-	}
-
-	/*
-	 * For HT capable stations, we save tidno for later use.
-	 * We also override seqno set by upper layer with the one
-	 * in tx aggregation state.
-	 *
-	 * If fragmentation is on, the sequence number is
-	 * not overridden, since it has been
-	 * incremented by the fragmentation routine.
-	 *
-	 * FIXME: check if the fragmentation threshold exceeds
-	 * IEEE80211 max.
-	 */
-	tid = ATH_AN_2_TID(an, bf->bf_tidno);
-	hdr->seq_ctrl = cpu_to_le16(tid->seq_next <<
-			IEEE80211_SEQ_SEQ_SHIFT);
-	bf->bf_seqno = tid->seq_next;
-	INCR(tid->seq_next, IEEE80211_SEQ_MAX);
-}
-
-static int setup_tx_flags(struct ath_softc *sc, struct sk_buff *skb,
-			  struct ath_txq *txq)
-{
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	int flags = 0;
-
-	flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */
-	flags |= ATH9K_TXDESC_INTREQ;
-
-	if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
-		flags |= ATH9K_TXDESC_NOACK;
-
-	return flags;
-}
-
-/*
- * rix - rate index
- * pktlen - total bytes (delims + data + fcs + pads + pad delims)
- * width  - 0 for 20 MHz, 1 for 40 MHz
- * half_gi - to use 4us v/s 3.6 us for symbol time
- */
-static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
-			    int width, int half_gi, bool shortPreamble)
-{
-	struct ath_rate_table *rate_table = sc->cur_rate_table;
-	u32 nbits, nsymbits, duration, nsymbols;
-	u8 rc;
-	int streams, pktlen;
-
-	pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen;
-	rc = rate_table->info[rix].ratecode;
-
-	/* for legacy rates, use old function to compute packet duration */
-	if (!IS_HT_RATE(rc))
-		return ath9k_hw_computetxtime(sc->sc_ah, rate_table, pktlen,
-					      rix, shortPreamble);
-
-	/* find number of symbols: PLCP + data */
-	nbits = (pktlen << 3) + OFDM_PLCP_BITS;
-	nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width];
-	nsymbols = (nbits + nsymbits - 1) / nsymbits;
-
-	if (!half_gi)
-		duration = SYMBOL_TIME(nsymbols);
-	else
-		duration = SYMBOL_TIME_HALFGI(nsymbols);
-
-	/* addup duration for legacy/ht training and signal fields */
-	streams = HT_RC_2_STREAMS(rc);
-	duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams);
-
-	return duration;
-}
-
-static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
-{
-	struct ath_rate_table *rt = sc->cur_rate_table;
-	struct ath9k_11n_rate_series series[4];
-	struct sk_buff *skb;
-	struct ieee80211_tx_info *tx_info;
-	struct ieee80211_tx_rate *rates;
-	struct ieee80211_hdr *hdr;
-	int i, flags = 0;
-	u8 rix = 0, ctsrate = 0;
-	bool is_pspoll;
-
-	memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
-
-	skb = bf->bf_mpdu;
-	tx_info = IEEE80211_SKB_CB(skb);
-	rates = tx_info->control.rates;
-	hdr = (struct ieee80211_hdr *)skb->data;
-	is_pspoll = ieee80211_is_pspoll(hdr->frame_control);
-
-	/*
-	 * We check if Short Preamble is needed for the CTS rate by
-	 * checking the BSS's global flag.
-	 * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used.
-	 */
-	if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
-		ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode |
-			rt->info[tx_info->control.rts_cts_rate_idx].short_preamble;
-	else
-		ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode;
-
-	/*
-	 * ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive.
-	 * Check the first rate in the series to decide whether RTS/CTS
-	 * or CTS-to-self has to be used.
-	 */
-	if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
-		flags = ATH9K_TXDESC_CTSENA;
-	else if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
-		flags = ATH9K_TXDESC_RTSENA;
-
-	/* FIXME: Handle aggregation protection */
-	if (sc->config.ath_aggr_prot &&
-	    (!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) {
-		flags = ATH9K_TXDESC_RTSENA;
-	}
-
-	/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
-	if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit))
-		flags &= ~(ATH9K_TXDESC_RTSENA);
-
-	for (i = 0; i < 4; i++) {
-		if (!rates[i].count || (rates[i].idx < 0))
-			continue;
-
-		rix = rates[i].idx;
-		series[i].Tries = rates[i].count;
-		series[i].ChSel = sc->tx_chainmask;
-
-		if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
-			series[i].Rate = rt->info[rix].ratecode |
-				rt->info[rix].short_preamble;
-		else
-			series[i].Rate = rt->info[rix].ratecode;
-
-		if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)
-			series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
-		if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
-			series[i].RateFlags |= ATH9K_RATESERIES_2040;
-		if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
-			series[i].RateFlags |= ATH9K_RATESERIES_HALFGI;
-
-		series[i].PktDuration = ath_pkt_duration(sc, rix, bf,
-			 (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) != 0,
-			 (rates[i].flags & IEEE80211_TX_RC_SHORT_GI),
-			 (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE));
-	}
-
-	/* set dur_update_en for l-sig computation except for PS-Poll frames */
-	ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc,
-				     bf->bf_lastbf->bf_desc,
-				     !is_pspoll, ctsrate,
-				     0, series, 4, flags);
-
-	if (sc->config.ath_aggr_prot && flags)
-		ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192);
-}
-
-static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf,
-				struct sk_buff *skb,
-				struct ath_tx_control *txctl)
-{
-	struct ath_wiphy *aphy = hw->priv;
-	struct ath_softc *sc = aphy->sc;
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct ath_tx_info_priv *tx_info_priv;
-	int hdrlen;
-	__le16 fc;
-
-	tx_info_priv = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC);
-	if (unlikely(!tx_info_priv))
-		return -ENOMEM;
-	tx_info->rate_driver_data[0] = tx_info_priv;
-	tx_info_priv->aphy = aphy;
-	tx_info_priv->frame_type = txctl->frame_type;
-	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-	fc = hdr->frame_control;
-
-	ATH_TXBUF_RESET(bf);
-
-	bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3);
-
-	if (conf_is_ht(&sc->hw->conf) && !is_pae(skb))
-		bf->bf_state.bf_type |= BUF_HT;
-
-	bf->bf_flags = setup_tx_flags(sc, skb, txctl->txq);
-
-	bf->bf_keytype = get_hw_crypto_keytype(skb);
-	if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) {
-		bf->bf_frmlen += tx_info->control.hw_key->icv_len;
-		bf->bf_keyix = tx_info->control.hw_key->hw_key_idx;
-	} else {
-		bf->bf_keyix = ATH9K_TXKEYIX_INVALID;
-	}
-
-	if (ieee80211_is_data_qos(fc) && (sc->sc_flags & SC_OP_TXAGGR))
-		assign_aggr_tid_seqno(skb, bf);
-
-	bf->bf_mpdu = skb;
-
-	bf->bf_dmacontext = dma_map_single(sc->dev, skb->data,
-					   skb->len, DMA_TO_DEVICE);
-	if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) {
-		bf->bf_mpdu = NULL;
-		DPRINTF(sc, ATH_DBG_CONFIG,
-			"dma_mapping_error() on TX\n");
-		return -ENOMEM;
-	}
-
-	bf->bf_buf_addr = bf->bf_dmacontext;
-	return 0;
-}
-
-/* FIXME: tx power */
-static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf,
-			     struct ath_tx_control *txctl)
-{
-	struct sk_buff *skb = bf->bf_mpdu;
-	struct ieee80211_tx_info *tx_info =  IEEE80211_SKB_CB(skb);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct ath_node *an = NULL;
-	struct list_head bf_head;
-	struct ath_desc *ds;
-	struct ath_atx_tid *tid;
-	struct ath_hw *ah = sc->sc_ah;
-	int frm_type;
-	__le16 fc;
-
-	frm_type = get_hw_packet_type(skb);
-	fc = hdr->frame_control;
-
-	INIT_LIST_HEAD(&bf_head);
-	list_add_tail(&bf->list, &bf_head);
-
-	ds = bf->bf_desc;
-	ds->ds_link = 0;
-	ds->ds_data = bf->bf_buf_addr;
-
-	ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER,
-			       bf->bf_keyix, bf->bf_keytype, bf->bf_flags);
-
-	ath9k_hw_filltxdesc(ah, ds,
-			    skb->len,	/* segment length */
-			    true,	/* first segment */
-			    true,	/* last segment */
-			    ds);	/* first descriptor */
-
-	spin_lock_bh(&txctl->txq->axq_lock);
-
-	if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) &&
-	    tx_info->control.sta) {
-		an = (struct ath_node *)tx_info->control.sta->drv_priv;
-		tid = ATH_AN_2_TID(an, bf->bf_tidno);
-
-		if (!ieee80211_is_data_qos(fc)) {
-			ath_tx_send_normal(sc, txctl->txq, &bf_head);
-			goto tx_done;
-		}
-
-		if (ath_aggr_query(sc, an, bf->bf_tidno)) {
-			/*
-			 * Try aggregation if it's a unicast data frame
-			 * and the destination is HT capable.
-			 */
-			ath_tx_send_ampdu(sc, tid, &bf_head, txctl);
-		} else {
-			/*
-			 * Send this frame as regular when ADDBA
-			 * exchange is neither complete nor pending.
-			 */
-			ath_tx_send_ht_normal(sc, txctl->txq,
-					      tid, &bf_head);
-		}
-	} else {
-		ath_tx_send_normal(sc, txctl->txq, &bf_head);
-	}
-
-tx_done:
-	spin_unlock_bh(&txctl->txq->axq_lock);
-}
-
-/* Upon failure caller should free skb */
-int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb,
-		 struct ath_tx_control *txctl)
-{
-	struct ath_wiphy *aphy = hw->priv;
-	struct ath_softc *sc = aphy->sc;
-	struct ath_buf *bf;
-	int r;
-
-	bf = ath_tx_get_buffer(sc);
-	if (!bf) {
-		DPRINTF(sc, ATH_DBG_XMIT, "TX buffers are full\n");
-		return -1;
-	}
-
-	r = ath_tx_setup_buffer(hw, bf, skb, txctl);
-	if (unlikely(r)) {
-		struct ath_txq *txq = txctl->txq;
-
-		DPRINTF(sc, ATH_DBG_FATAL, "TX mem alloc failure\n");
-
-		/* upon ath_tx_processq() this TX queue will be resumed, we
-		 * guarantee this will happen by knowing beforehand that
-		 * we will at least have to run TX completionon one buffer
-		 * on the queue */
-		spin_lock_bh(&txq->axq_lock);
-		if (sc->tx.txq[txq->axq_qnum].axq_depth > 1) {
-			ieee80211_stop_queue(sc->hw,
-				skb_get_queue_mapping(skb));
-			txq->stopped = 1;
-		}
-		spin_unlock_bh(&txq->axq_lock);
-
-		spin_lock_bh(&sc->tx.txbuflock);
-		list_add_tail(&bf->list, &sc->tx.txbuf);
-		spin_unlock_bh(&sc->tx.txbuflock);
-
-		return r;
-	}
-
-	ath_tx_start_dma(sc, bf, txctl);
-
-	return 0;
-}
-
-void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
-{
-	struct ath_wiphy *aphy = hw->priv;
-	struct ath_softc *sc = aphy->sc;
-	int hdrlen, padsize;
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_control txctl;
-
-	memset(&txctl, 0, sizeof(struct ath_tx_control));
-
-	/*
-	 * As a temporary workaround, assign seq# here; this will likely need
-	 * to be cleaned up to work better with Beacon transmission and virtual
-	 * BSSes.
-	 */
-	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
-		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-		if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
-			sc->tx.seq_no += 0x10;
-		hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
-		hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
-	}
-
-	/* Add the padding after the header if this is not already done */
-	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-	if (hdrlen & 3) {
-		padsize = hdrlen % 4;
-		if (skb_headroom(skb) < padsize) {
-			DPRINTF(sc, ATH_DBG_XMIT, "TX CABQ padding failed\n");
-			dev_kfree_skb_any(skb);
-			return;
-		}
-		skb_push(skb, padsize);
-		memmove(skb->data, skb->data + padsize, hdrlen);
-	}
-
-	txctl.txq = sc->beacon.cabq;
-
-	DPRINTF(sc, ATH_DBG_XMIT, "transmitting CABQ packet, skb: %p\n", skb);
-
-	if (ath_tx_start(hw, skb, &txctl) != 0) {
-		DPRINTF(sc, ATH_DBG_XMIT, "CABQ TX failed\n");
-		goto exit;
-	}
-
-	return;
-exit:
-	dev_kfree_skb_any(skb);
-}
-
-/*****************/
-/* TX Completion */
-/*****************/
-
-static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
-			    int tx_flags)
-{
-	struct ieee80211_hw *hw = sc->hw;
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
-	int hdrlen, padsize;
-	int frame_type = ATH9K_NOT_INTERNAL;
-
-	DPRINTF(sc, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb);
-
-	if (tx_info_priv) {
-		hw = tx_info_priv->aphy->hw;
-		frame_type = tx_info_priv->frame_type;
-	}
-
-	if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
-	    tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
-		kfree(tx_info_priv);
-		tx_info->rate_driver_data[0] = NULL;
-	}
-
-	if (tx_flags & ATH_TX_BAR)
-		tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
-
-	if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) {
-		/* Frame was ACKed */
-		tx_info->flags |= IEEE80211_TX_STAT_ACK;
-	}
-
-	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-	padsize = hdrlen & 3;
-	if (padsize && hdrlen >= 24) {
-		/*
-		 * Remove MAC header padding before giving the frame back to
-		 * mac80211.
-		 */
-		memmove(skb->data + padsize, skb->data, hdrlen);
-		skb_pull(skb, padsize);
-	}
-
-	if (frame_type == ATH9K_NOT_INTERNAL)
-		ieee80211_tx_status(hw, skb);
-	else
-		ath9k_tx_status(hw, skb);
-}
-
-static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
-				struct list_head *bf_q,
-				int txok, int sendbar)
-{
-	struct sk_buff *skb = bf->bf_mpdu;
-	unsigned long flags;
-	int tx_flags = 0;
-
-
-	if (sendbar)
-		tx_flags = ATH_TX_BAR;
-
-	if (!txok) {
-		tx_flags |= ATH_TX_ERROR;
-
-		if (bf_isxretried(bf))
-			tx_flags |= ATH_TX_XRETRY;
-	}
-
-	dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE);
-	ath_tx_complete(sc, skb, tx_flags);
-
-	/*
-	 * Return the list of ath_buf of this mpdu to free queue
-	 */
-	spin_lock_irqsave(&sc->tx.txbuflock, flags);
-	list_splice_tail_init(bf_q, &sc->tx.txbuf);
-	spin_unlock_irqrestore(&sc->tx.txbuflock, flags);
-}
-
-static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
-			      int txok)
-{
-	struct ath_buf *bf_last = bf->bf_lastbf;
-	struct ath_desc *ds = bf_last->bf_desc;
-	u16 seq_st = 0;
-	u32 ba[WME_BA_BMP_SIZE >> 5];
-	int ba_index;
-	int nbad = 0;
-	int isaggr = 0;
-
-	if (ds->ds_txstat.ts_flags == ATH9K_TX_SW_ABORTED)
-		return 0;
-
-	isaggr = bf_isaggr(bf);
-	if (isaggr) {
-		seq_st = ATH_DS_BA_SEQ(ds);
-		memcpy(ba, ATH_DS_BA_BITMAP(ds), WME_BA_BMP_SIZE >> 3);
-	}
-
-	while (bf) {
-		ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno);
-		if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index)))
-			nbad++;
-
-		bf = bf->bf_next;
-	}
-
-	return nbad;
-}
-
-static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds,
-			     int nbad, int txok, bool update_rc)
-{
-	struct sk_buff *skb = bf->bf_mpdu;
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
-	struct ieee80211_hw *hw = tx_info_priv->aphy->hw;
-	u8 i, tx_rateindex;
-
-	if (txok)
-		tx_info->status.ack_signal = ds->ds_txstat.ts_rssi;
-
-	tx_rateindex = ds->ds_txstat.ts_rateindex;
-	WARN_ON(tx_rateindex >= hw->max_rates);
-
-	tx_info_priv->update_rc = update_rc;
-	if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT)
-		tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
-
-	if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 &&
-	    (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) {
-		if (ieee80211_is_data(hdr->frame_control)) {
-			memcpy(&tx_info_priv->tx, &ds->ds_txstat,
-			       sizeof(tx_info_priv->tx));
-			tx_info_priv->n_frames = bf->bf_nframes;
-			tx_info_priv->n_bad_frames = nbad;
-		}
-	}
-
-	for (i = tx_rateindex + 1; i < hw->max_rates; i++)
-		tx_info->status.rates[i].count = 0;
-
-	tx_info->status.rates[tx_rateindex].count = bf->bf_retries + 1;
-}
-
-static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq)
-{
-	int qnum;
-
-	spin_lock_bh(&txq->axq_lock);
-	if (txq->stopped &&
-	    sc->tx.txq[txq->axq_qnum].axq_depth <= (ATH_TXBUF - 20)) {
-		qnum = ath_get_mac80211_qnum(txq->axq_qnum, sc);
-		if (qnum != -1) {
-			ieee80211_wake_queue(sc->hw, qnum);
-			txq->stopped = 0;
-		}
-	}
-	spin_unlock_bh(&txq->axq_lock);
-}
-
-static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
-{
-	struct ath_hw *ah = sc->sc_ah;
-	struct ath_buf *bf, *lastbf, *bf_held = NULL;
-	struct list_head bf_head;
-	struct ath_desc *ds;
-	int txok;
-	int status;
-
-	DPRINTF(sc, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n",
-		txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum),
-		txq->axq_link);
-
-	for (;;) {
-		spin_lock_bh(&txq->axq_lock);
-		if (list_empty(&txq->axq_q)) {
-			txq->axq_link = NULL;
-			txq->axq_linkbuf = NULL;
-			spin_unlock_bh(&txq->axq_lock);
-			break;
-		}
-		bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
-
-		/*
-		 * There is a race condition that a BH gets scheduled
-		 * after sw writes TxE and before hw re-load the last
-		 * descriptor to get the newly chained one.
-		 * Software must keep the last DONE descriptor as a
-		 * holding descriptor - software does so by marking
-		 * it with the STALE flag.
-		 */
-		bf_held = NULL;
-		if (bf->bf_stale) {
-			bf_held = bf;
-			if (list_is_last(&bf_held->list, &txq->axq_q)) {
-				txq->axq_link = NULL;
-				txq->axq_linkbuf = NULL;
-				spin_unlock_bh(&txq->axq_lock);
-
-				/*
-				 * The holding descriptor is the last
-				 * descriptor in queue. It's safe to remove
-				 * the last holding descriptor in BH context.
-				 */
-				spin_lock_bh(&sc->tx.txbuflock);
-				list_move_tail(&bf_held->list, &sc->tx.txbuf);
-				spin_unlock_bh(&sc->tx.txbuflock);
-
-				break;
-			} else {
-				bf = list_entry(bf_held->list.next,
-						struct ath_buf, list);
-			}
-		}
-
-		lastbf = bf->bf_lastbf;
-		ds = lastbf->bf_desc;
-
-		status = ath9k_hw_txprocdesc(ah, ds);
-		if (status == -EINPROGRESS) {
-			spin_unlock_bh(&txq->axq_lock);
-			break;
-		}
-		if (bf->bf_desc == txq->axq_lastdsWithCTS)
-			txq->axq_lastdsWithCTS = NULL;
-		if (ds == txq->axq_gatingds)
-			txq->axq_gatingds = NULL;
-
-		/*
-		 * Remove ath_buf's of the same transmit unit from txq,
-		 * however leave the last descriptor back as the holding
-		 * descriptor for hw.
-		 */
-		lastbf->bf_stale = true;
-		INIT_LIST_HEAD(&bf_head);
-		if (!list_is_singular(&lastbf->list))
-			list_cut_position(&bf_head,
-				&txq->axq_q, lastbf->list.prev);
-
-		txq->axq_depth--;
-		if (bf_isaggr(bf))
-			txq->axq_aggr_depth--;
-
-		txok = (ds->ds_txstat.ts_status == 0);
-		spin_unlock_bh(&txq->axq_lock);
-
-		if (bf_held) {
-			spin_lock_bh(&sc->tx.txbuflock);
-			list_move_tail(&bf_held->list, &sc->tx.txbuf);
-			spin_unlock_bh(&sc->tx.txbuflock);
-		}
-
-		if (!bf_isampdu(bf)) {
-			/*
-			 * This frame is sent out as a single frame.
-			 * Use hardware retry status for this frame.
-			 */
-			bf->bf_retries = ds->ds_txstat.ts_longretry;
-			if (ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY)
-				bf->bf_state.bf_type |= BUF_XRETRY;
-			ath_tx_rc_status(bf, ds, 0, txok, true);
-		}
-
-		if (bf_isampdu(bf))
-			ath_tx_complete_aggr(sc, txq, bf, &bf_head, txok);
-		else
-			ath_tx_complete_buf(sc, bf, &bf_head, txok, 0);
-
-		ath_wake_mac80211_queue(sc, txq);
-
-		spin_lock_bh(&txq->axq_lock);
-		if (sc->sc_flags & SC_OP_TXAGGR)
-			ath_txq_schedule(sc, txq);
-		spin_unlock_bh(&txq->axq_lock);
-	}
-}
-
-
-void ath_tx_tasklet(struct ath_softc *sc)
-{
-	int i;
-	u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1);
-
-	ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask);
-
-	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
-		if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i)))
-			ath_tx_processq(sc, &sc->tx.txq[i]);
-	}
-}
-
-/*****************/
-/* Init, Cleanup */
-/*****************/
-
-int ath_tx_init(struct ath_softc *sc, int nbufs)
-{
-	int error = 0;
-
-	spin_lock_init(&sc->tx.txbuflock);
-
-	error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf,
-				  "tx", nbufs, 1);
-	if (error != 0) {
-		DPRINTF(sc, ATH_DBG_FATAL,
-			"Failed to allocate tx descriptors: %d\n", error);
-		goto err;
-	}
-
-	error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf,
-				  "beacon", ATH_BCBUF, 1);
-	if (error != 0) {
-		DPRINTF(sc, ATH_DBG_FATAL,
-			"Failed to allocate beacon descriptors: %d\n", error);
-		goto err;
-	}
-
-err:
-	if (error != 0)
-		ath_tx_cleanup(sc);
-
-	return error;
-}
-
-void ath_tx_cleanup(struct ath_softc *sc)
-{
-	if (sc->beacon.bdma.dd_desc_len != 0)
-		ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf);
-
-	if (sc->tx.txdma.dd_desc_len != 0)
-		ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf);
-}
-
-void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an)
-{
-	struct ath_atx_tid *tid;
-	struct ath_atx_ac *ac;
-	int tidno, acno;
-
-	for (tidno = 0, tid = &an->tid[tidno];
-	     tidno < WME_NUM_TID;
-	     tidno++, tid++) {
-		tid->an        = an;
-		tid->tidno     = tidno;
-		tid->seq_start = tid->seq_next = 0;
-		tid->baw_size  = WME_MAX_BA;
-		tid->baw_head  = tid->baw_tail = 0;
-		tid->sched     = false;
-		tid->paused    = false;
-		tid->state &= ~AGGR_CLEANUP;
-		INIT_LIST_HEAD(&tid->buf_q);
-		acno = TID_TO_WME_AC(tidno);
-		tid->ac = &an->ac[acno];
-		tid->state &= ~AGGR_ADDBA_COMPLETE;
-		tid->state &= ~AGGR_ADDBA_PROGRESS;
-		tid->addba_exchangeattempts = 0;
-	}
-
-	for (acno = 0, ac = &an->ac[acno];
-	     acno < WME_NUM_AC; acno++, ac++) {
-		ac->sched    = false;
-		INIT_LIST_HEAD(&ac->tid_q);
-
-		switch (acno) {
-		case WME_AC_BE:
-			ac->qnum = ath_tx_get_qnum(sc,
-				   ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE);
-			break;
-		case WME_AC_BK:
-			ac->qnum = ath_tx_get_qnum(sc,
-				   ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BK);
-			break;
-		case WME_AC_VI:
-			ac->qnum = ath_tx_get_qnum(sc,
-				   ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VI);
-			break;
-		case WME_AC_VO:
-			ac->qnum = ath_tx_get_qnum(sc,
-				   ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VO);
-			break;
-		}
-	}
-}
-
-void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an)
-{
-	int i;
-	struct ath_atx_ac *ac, *ac_tmp;
-	struct ath_atx_tid *tid, *tid_tmp;
-	struct ath_txq *txq;
-
-	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
-		if (ATH_TXQ_SETUP(sc, i)) {
-			txq = &sc->tx.txq[i];
-
-			spin_lock(&txq->axq_lock);
-
-			list_for_each_entry_safe(ac,
-					ac_tmp, &txq->axq_acq, list) {
-				tid = list_first_entry(&ac->tid_q,
-						struct ath_atx_tid, list);
-				if (tid && tid->an != an)
-					continue;
-				list_del(&ac->list);
-				ac->sched = false;
-
-				list_for_each_entry_safe(tid,
-						tid_tmp, &ac->tid_q, list) {
-					list_del(&tid->list);
-					tid->sched = false;
-					ath_tid_drain(sc, txq, tid);
-					tid->state &= ~AGGR_ADDBA_COMPLETE;
-					tid->addba_exchangeattempts = 0;
-					tid->state &= ~AGGR_CLEANUP;
-				}
-			}
-
-			spin_unlock(&txq->axq_lock);
-		}
-	}
-}