[XFS] Fix merge failures

Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:

	fs/xfs/linux-2.6/xfs_cred.h
	fs/xfs/linux-2.6/xfs_globals.h
	fs/xfs/linux-2.6/xfs_ioctl.c
	fs/xfs/xfs_vnodeops.h

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 645 insertions, 887 deletions

diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 3a47579..3bfc3b9 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -14,10 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/*
- * Implementation of transmit path.
- */
-
 #include "core.h"
 
 #define BITS_PER_BYTE           8
@@ -65,11 +61,12 @@ static u32 bits_per_symbol[][2] = {
  * NB: must be called with txq lock held
  */
 
-static void ath_tx_txqaddbuf(struct ath_softc *sc,
-		struct ath_txq *txq, struct list_head *head)
+static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
+			     struct list_head *head)
 {
 	struct ath_hal *ah = sc->sc_ah;
 	struct ath_buf *bf;
+
 	/*
 	 * Insert the frame on the outbound list and
 	 * pass it on to the hardware.
@@ -86,18 +83,16 @@ static void ath_tx_txqaddbuf(struct ath_softc *sc,
 	txq->axq_linkbuf = list_entry(txq->axq_q.prev, struct ath_buf, list);
 
 	DPRINTF(sc, ATH_DBG_QUEUE,
-		"%s: txq depth = %d\n", __func__, txq->axq_depth);
+		"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,
-			"%s: TXDP[%u] = %llx (%p)\n",
-			__func__, txq->axq_qnum,
-			ito64(bf->bf_daddr), bf->bf_desc);
+			"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, "%s: link[%u] (%p)=%llx (%p)\n",
-			__func__,
+		DPRINTF(sc, ATH_DBG_XMIT, "link[%u] (%p)=%llx (%p)\n",
 			txq->axq_qnum, txq->axq_link,
 			ito64(bf->bf_daddr), bf->bf_desc);
 	}
@@ -105,46 +100,94 @@ static void ath_tx_txqaddbuf(struct ath_softc *sc,
 	ath9k_hw_txstart(ah, txq->axq_qnum);
 }
 
-/* Get transmit rate index using rate in Kbps */
-
-static int ath_tx_findindex(const struct ath9k_rate_table *rt, int rate)
+static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
+			    struct ath_xmit_status *tx_status)
 {
-	int i;
-	int ndx = 0;
+	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;
 
-	for (i = 0; i < rt->rateCount; i++) {
-		if (rt->info[i].rateKbps == rate) {
-			ndx = i;
-			break;
-		}
+	DPRINTF(sc, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb);
+
+	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_status->flags & ATH_TX_BAR) {
+		tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
+		tx_status->flags &= ~ATH_TX_BAR;
+	}
+
+	if (!(tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) {
+		/* Frame was ACKed */
+		tx_info->flags |= IEEE80211_TX_STAT_ACK;
+	}
+
+	tx_info->status.rates[0].count = tx_status->retries;
+	if (tx_info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
+		/* Change idx from internal table index to MCS index */
+		int idx = tx_info->status.rates[0].idx;
+		struct ath_rate_table *rate_table = sc->cur_rate_table;
+		if (idx >= 0 && idx < rate_table->rate_cnt)
+			tx_info->status.rates[0].idx =
+				rate_table->info[idx].ratecode & 0x7f;
+	}
+
+	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);
 	}
 
-	return ndx;
+	ieee80211_tx_status(hw, skb);
 }
 
 /* Check if it's okay to send out aggregates */
 
-static int ath_aggr_query(struct ath_softc *sc,
-	struct ath_node *an, u8 tidno)
+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->addba_exchangecomplete || tid->addba_exchangeinprogress)
+	if (tid->state & AGGR_ADDBA_COMPLETE ||
+	    tid->state & AGGR_ADDBA_PROGRESS)
 		return 1;
 	else
 		return 0;
 }
 
-static enum ath9k_pkt_type get_hal_packet_type(struct ieee80211_hdr *hdr)
+static void ath_get_beaconconfig(struct ath_softc *sc, int if_id,
+				 struct ath_beacon_config *conf)
+{
+	struct ieee80211_hw *hw = sc->hw;
+
+	/* fill in beacon config data */
+
+	conf->beacon_interval = hw->conf.beacon_int;
+	conf->listen_interval = 100;
+	conf->dtim_count = 1;
+	conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
+}
+
+/* Calculate Atheros packet type from IEEE80211 packet header */
+
+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;
 
-	/* Calculate Atheros packet type from IEEE80211 packet header */
-
 	if (ieee80211_is_beacon(fc))
 		htype = ATH9K_PKT_TYPE_BEACON;
 	else if (ieee80211_is_probe_resp(fc))
@@ -159,232 +202,123 @@ static enum ath9k_pkt_type get_hal_packet_type(struct ieee80211_hdr *hdr)
 	return htype;
 }
 
-static void fill_min_rates(struct sk_buff *skb, struct ath_tx_control *txctl)
+static bool is_pae(struct sk_buff *skb)
 {
 	struct ieee80211_hdr *hdr;
-	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_info_priv *tx_info_priv;
 	__le16 fc;
 
 	hdr = (struct ieee80211_hdr *)skb->data;
 	fc = hdr->frame_control;
-	tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
 
-	if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)) {
-		txctl->use_minrate = 1;
-		txctl->min_rate = tx_info_priv->min_rate;
-	} else if (ieee80211_is_data(fc)) {
+	if (ieee80211_is_data(fc)) {
 		if (ieee80211_is_nullfunc(fc) ||
-			/* Port Access Entity (IEEE 802.1X) */
-			(skb->protocol == cpu_to_be16(0x888E))) {
-			txctl->use_minrate = 1;
-			txctl->min_rate = tx_info_priv->min_rate;
+		    /* Port Access Entity (IEEE 802.1X) */
+		    (skb->protocol == cpu_to_be16(ETH_P_PAE))) {
+			return true;
 		}
-		if (is_multicast_ether_addr(hdr->addr1))
-			txctl->mcast_rate = tx_info_priv->min_rate;
 	}
 
+	return false;
 }
 
-/* This function will setup additional txctl information, mostly rate stuff */
-/* FIXME: seqno, ps */
-static int ath_tx_prepare(struct ath_softc *sc,
-			  struct sk_buff *skb,
-			  struct ath_tx_control *txctl)
+static int get_hw_crypto_keytype(struct sk_buff *skb)
 {
-	struct ieee80211_hw *hw = sc->hw;
-	struct ieee80211_hdr *hdr;
-	struct ath_rc_series *rcs;
-	struct ath_txq *txq = NULL;
-	const struct ath9k_rate_table *rt;
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
-	struct ath_tx_info_priv *tx_info_priv;
-	int hdrlen;
-	u8 rix, antenna;
-	__le16 fc;
-	u8 *qc;
-
-	txctl->dev = sc;
-	hdr = (struct ieee80211_hdr *)skb->data;
-	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
-	fc = hdr->frame_control;
-
-	rt = sc->sc_currates;
-	BUG_ON(!rt);
-
-	/* Fill misc fields */
-
-	spin_lock_bh(&sc->node_lock);
-	txctl->an = ath_node_get(sc, hdr->addr1);
-	/* create a temp node, if the node is not there already */
-	if (!txctl->an)
-		txctl->an = ath_node_attach(sc, hdr->addr1, 0);
-	spin_unlock_bh(&sc->node_lock);
-
-	if (ieee80211_is_data_qos(fc)) {
-		qc = ieee80211_get_qos_ctl(hdr);
-		txctl->tidno = qc[0] & 0xf;
-	}
-
-	txctl->if_id = 0;
-	txctl->frmlen = skb->len + FCS_LEN - (hdrlen & 3);
-	txctl->txpower = MAX_RATE_POWER; /* FIXME */
-
-	/* Fill Key related fields */
-
-	txctl->keytype = ATH9K_KEY_TYPE_CLEAR;
-	txctl->keyix = ATH9K_TXKEYIX_INVALID;
 
 	if (tx_info->control.hw_key) {
-		txctl->keyix = tx_info->control.hw_key->hw_key_idx;
-		txctl->frmlen += tx_info->control.hw_key->icv_len;
-
 		if (tx_info->control.hw_key->alg == ALG_WEP)
-			txctl->keytype = ATH9K_KEY_TYPE_WEP;
+			return ATH9K_KEY_TYPE_WEP;
 		else if (tx_info->control.hw_key->alg == ALG_TKIP)
-			txctl->keytype = ATH9K_KEY_TYPE_TKIP;
+			return ATH9K_KEY_TYPE_TKIP;
 		else if (tx_info->control.hw_key->alg == ALG_CCMP)
-			txctl->keytype = ATH9K_KEY_TYPE_AES;
-	}
-
-	/* Fill packet type */
-
-	txctl->atype = get_hal_packet_type(hdr);
-
-	/* Fill qnum */
-
-	if (unlikely(txctl->flags & ATH9K_TXDESC_CAB)) {
-		txctl->qnum = 0;
-		txq = sc->sc_cabq;
-	} else {
-		txctl->qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc);
-		txq = &sc->sc_txq[txctl->qnum];
-	}
-	spin_lock_bh(&txq->axq_lock);
-
-	/* Try to avoid running out of descriptors */
-	if (txq->axq_depth >= (ATH_TXBUF - 20) &&
-	    !(txctl->flags & ATH9K_TXDESC_CAB)) {
-		DPRINTF(sc, ATH_DBG_FATAL,
-			"%s: TX queue: %d is full, depth: %d\n",
-			__func__,
-			txctl->qnum,
-			txq->axq_depth);
-		ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
-		txq->stopped = 1;
-		spin_unlock_bh(&txq->axq_lock);
-		return -1;
+			return ATH9K_KEY_TYPE_AES;
 	}
 
-	spin_unlock_bh(&txq->axq_lock);
-
-	/* Fill rate */
-
-	fill_min_rates(skb, txctl);
+	return ATH9K_KEY_TYPE_CLEAR;
+}
 
-	/* Fill flags */
+/* Called only when tx aggregation is enabled and HT is supported */
 
-	txctl->flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */
+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->flags & IEEE80211_TX_CTL_NO_ACK)
-		txctl->flags |= ATH9K_TXDESC_NOACK;
-	if (tx_info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
-		txctl->flags |= ATH9K_TXDESC_RTSENA;
+	if (!tx_info->control.sta)
+		return;
 
-	/*
-	 * Setup for rate calculations.
-	 */
-	tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
-	rcs = tx_info_priv->rcs;
+	an = (struct ath_node *)tx_info->control.sta->drv_priv;
+	hdr = (struct ieee80211_hdr *)skb->data;
+	fc = hdr->frame_control;
 
-	if (ieee80211_is_data(fc) && !txctl->use_minrate) {
+	/* Get tidno */
 
-		/* Enable HT only for DATA frames and not for EAPOL */
-		txctl->ht = (hw->conf.ht_conf.ht_supported &&
-			    (tx_info->flags & IEEE80211_TX_CTL_AMPDU));
+	if (ieee80211_is_data_qos(fc)) {
+		qc = ieee80211_get_qos_ctl(hdr);
+		bf->bf_tidno = qc[0] & 0xf;
+	}
 
-		if (is_multicast_ether_addr(hdr->addr1)) {
-			rcs[0].rix = (u8)
-				ath_tx_findindex(rt, txctl->mcast_rate);
+	/* Get seqno */
 
-			/*
-			 * mcast packets are not re-tried.
-			 */
-			rcs[0].tries = 1;
-		}
+	if (ieee80211_is_data(fc) && !is_pae(skb)) {
 		/* 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.
 		 *
-		 * First, the fragmentation stat is determined.
 		 * 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.
 		 */
-		if (likely(!(txctl->flags & ATH9K_TXDESC_FRAG_IS_ON)) &&
-		    txctl->ht && (sc->sc_flags & SC_OP_TXAGGR)) {
-			struct ath_atx_tid *tid;
+		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);
+	}
+}
 
-			tid = ATH_AN_2_TID(txctl->an, txctl->tidno);
+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;
 
-			hdr->seq_ctrl = cpu_to_le16(tid->seq_next <<
-				IEEE80211_SEQ_SEQ_SHIFT);
-			txctl->seqno = tid->seq_next;
-			INCR(tid->seq_next, IEEE80211_SEQ_MAX);
-		}
-	} else {
-		/* for management and control frames,
-		 * or for NULL and EAPOL frames */
-		if (txctl->min_rate)
-			rcs[0].rix = ath_rate_findrateix(sc, txctl->min_rate);
-		else
-			rcs[0].rix = 0;
-		rcs[0].tries = ATH_MGT_TXMAXTRY;
-	}
-	rix = rcs[0].rix;
+	flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */
+	flags |= ATH9K_TXDESC_INTREQ;
 
-	if (ieee80211_has_morefrags(fc) ||
-	    (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
-		/*
-		**  Force hardware to use computed duration for next
-		**  fragment by disabling multi-rate retry, which
-		**  updates duration based on the multi-rate
-		**  duration table.
-		*/
-		rcs[1].tries = rcs[2].tries = rcs[3].tries = 0;
-		rcs[1].rix = rcs[2].rix = rcs[3].rix = 0;
-		/* reset tries but keep rate index */
-		rcs[0].tries = ATH_TXMAXTRY;
-	}
+	if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
+		flags |= ATH9K_TXDESC_NOACK;
+	if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
+		flags |= ATH9K_TXDESC_RTSENA;
 
-	/*
-	 * Determine if a tx interrupt should be generated for
-	 * this descriptor.  We take a tx interrupt to reap
-	 * descriptors when the h/w hits an EOL condition or
-	 * when the descriptor is specifically marked to generate
-	 * an interrupt.  We periodically mark descriptors in this
-	 * way to insure timely replenishing of the supply needed
-	 * for sending frames.  Defering interrupts reduces system
-	 * load and potentially allows more concurrent work to be
-	 * done but if done to aggressively can cause senders to
-	 * backup.
-	 *
-	 * NB: use >= to deal with sc_txintrperiod changing
-	 *     dynamically through sysctl.
-	 */
-	spin_lock_bh(&txq->axq_lock);
-	if ((++txq->axq_intrcnt >= sc->sc_txintrperiod)) {
-		txctl->flags |= ATH9K_TXDESC_INTREQ;
-		txq->axq_intrcnt = 0;
-	}
-	spin_unlock_bh(&txq->axq_lock);
+	return flags;
+}
+
+static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc)
+{
+	struct ath_buf *bf = NULL;
 
-	if (is_multicast_ether_addr(hdr->addr1)) {
-		antenna = sc->sc_mcastantenna + 1;
-		sc->sc_mcastantenna = (sc->sc_mcastantenna + 1) & 0x1;
+	spin_lock_bh(&sc->tx.txbuflock);
+
+	if (unlikely(list_empty(&sc->tx.txbuf))) {
+		spin_unlock_bh(&sc->tx.txbuflock);
+		return NULL;
 	}
 
-	return 0;
+	bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list);
+	list_del(&bf->list);
+
+	spin_unlock_bh(&sc->tx.txbuflock);
+
+	return bf;
 }
 
 /* To complete a chain of buffers associated a frame */
@@ -396,6 +330,7 @@ static void ath_tx_complete_buf(struct ath_softc *sc,
 {
 	struct sk_buff *skb = bf->bf_mpdu;
 	struct ath_xmit_status tx_status;
+	unsigned long flags;
 
 	/*
 	 * Set retry information.
@@ -414,20 +349,21 @@ static void ath_tx_complete_buf(struct ath_softc *sc,
 		if (bf_isxretried(bf))
 			tx_status.flags |= ATH_TX_XRETRY;
 	}
+
 	/* Unmap this frame */
 	pci_unmap_single(sc->pdev,
 			 bf->bf_dmacontext,
 			 skb->len,
 			 PCI_DMA_TODEVICE);
 	/* complete this frame */
-	ath_tx_complete(sc, skb, &tx_status, bf->bf_node);
+	ath_tx_complete(sc, skb, &tx_status);
 
 	/*
 	 * Return the list of ath_buf of this mpdu to free queue
 	 */
-	spin_lock_bh(&sc->sc_txbuflock);
-	list_splice_tail_init(bf_q, &sc->sc_txbuf);
-	spin_unlock_bh(&sc->sc_txbuflock);
+	spin_lock_irqsave(&sc->tx.txbuflock, flags);
+	list_splice_tail_init(bf_q, &sc->tx.txbuf);
+	spin_unlock_irqrestore(&sc->tx.txbuflock, flags);
 }
 
 /*
@@ -468,7 +404,7 @@ static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid)
 
 static void ath_tx_pause_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 {
-	struct ath_txq *txq = &sc->sc_txq[tid->ac->qnum];
+	struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
 
 	spin_lock_bh(&txq->axq_lock);
 
@@ -481,7 +417,7 @@ static void ath_tx_pause_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 
 void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 {
-	struct ath_txq *txq = &sc->sc_txq[tid->ac->qnum];
+	struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
 
 	ASSERT(tid->paused > 0);
 	spin_lock_bh(&txq->axq_lock);
@@ -505,11 +441,9 @@ unlock:
 
 /* Compute the number of bad frames */
 
-static int ath_tx_num_badfrms(struct ath_softc *sc,
-	struct ath_buf *bf, int txok)
+static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf,
+			      int txok)
 {
-	struct ath_node *an = bf->bf_node;
-	int isnodegone = (an->an_flags & ATH_NODE_CLEAN);
 	struct ath_buf *bf_last = bf->bf_lastbf;
 	struct ath_desc *ds = bf_last->bf_desc;
 	u16 seq_st = 0;
@@ -518,7 +452,7 @@ static int ath_tx_num_badfrms(struct ath_softc *sc,
 	int nbad = 0;
 	int isaggr = 0;
 
-	if (isnodegone || ds->ds_txstat.ts_flags == ATH9K_TX_SW_ABORTED)
+	if (ds->ds_txstat.ts_flags == ATH9K_TX_SW_ABORTED)
 		return 0;
 
 	isaggr = bf_isaggr(bf);
@@ -553,8 +487,8 @@ static void ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
 
 /* Update block ack window */
 
-static void ath_tx_update_baw(struct ath_softc *sc,
-	struct ath_atx_tid *tid, int seqno)
+static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
+			      int seqno)
 {
 	int index, cindex;
 
@@ -577,34 +511,23 @@ static void ath_tx_update_baw(struct ath_softc *sc,
  * 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)
+static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
+			    int width, int half_gi, bool shortPreamble)
 {
-	const struct ath9k_rate_table *rt = sc->sc_currates;
+	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 = rt->info[rix].rateCode;
+	rc = rate_table->info[rix].ratecode;
 
-	/*
-	 * for legacy rates, use old function to compute packet duration
-	 */
+	/* for legacy rates, use old function to compute packet duration */
 	if (!IS_HT_RATE(rc))
-		return ath9k_hw_computetxtime(sc->sc_ah,
-					     rt,
-					     pktlen,
-					     rix,
-					     shortPreamble);
-	/*
-	 * find number of symbols: PLCP + data
-	 */
+		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;
@@ -614,11 +537,10 @@ static u32 ath_pkt_duration(struct ath_softc *sc,
 	else
 		duration = SYMBOL_TIME_HALFGI(nsymbols);
 
-	/*
-	 * addup duration for legacy/ht training and signal fields
-	 */
+	/* 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;
 }
 
@@ -627,207 +549,127 @@ static u32 ath_pkt_duration(struct ath_softc *sc,
 static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
 {
 	struct ath_hal *ah = sc->sc_ah;
-	const struct ath9k_rate_table *rt;
+	struct ath_rate_table *rt;
 	struct ath_desc *ds = bf->bf_desc;
 	struct ath_desc *lastds = bf->bf_lastbf->bf_desc;
 	struct ath9k_11n_rate_series series[4];
-	int i, flags, rtsctsena = 0, dynamic_mimops = 0;
+	struct sk_buff *skb;
+	struct ieee80211_tx_info *tx_info;
+	struct ieee80211_tx_rate *rates;
+	struct ieee80211_hdr *hdr;
+	int i, flags, rtsctsena = 0;
 	u32 ctsduration = 0;
 	u8 rix = 0, cix, ctsrate = 0;
-	u32 aggr_limit_with_rts = ah->ah_caps.rts_aggr_limit;
-	struct ath_node *an = (struct ath_node *) bf->bf_node;
+	__le16 fc;
 
-	/*
-	 * get the cix for the lowest valid rix.
-	 */
-	rt = sc->sc_currates;
-	for (i = 4; i--;) {
-		if (bf->bf_rcs[i].tries) {
-			rix = bf->bf_rcs[i].rix;
+	memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
+
+	skb = (struct sk_buff *)bf->bf_mpdu;
+	hdr = (struct ieee80211_hdr *)skb->data;
+	fc = hdr->frame_control;
+	tx_info = IEEE80211_SKB_CB(skb);
+	rates = tx_info->control.rates;
+
+	if (ieee80211_has_morefrags(fc) ||
+	    (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
+		rates[1].count = rates[2].count = rates[3].count = 0;
+		rates[1].idx = rates[2].idx = rates[3].idx = 0;
+		rates[0].count = ATH_TXMAXTRY;
+	}
+
+	/* get the cix for the lowest valid rix */
+	rt = sc->cur_rate_table;
+	for (i = 3; i >= 0; i--) {
+		if (rates[i].count && (rates[i].idx >= 0)) {
+			rix = rates[i].idx;
 			break;
 		}
 	}
+
 	flags = (bf->bf_flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA));
-	cix = rt->info[rix].controlRate;
+	cix = rt->info[rix].ctrl_rate;
 
 	/*
-	 * If 802.11g protection is enabled, determine whether
-	 * to use RTS/CTS or just CTS.  Note that this is only
-	 * done for OFDM/HT unicast frames.
+	 * If 802.11g protection is enabled, determine whether to use RTS/CTS or
+	 * just CTS.  Note that this is only done for OFDM/HT unicast frames.
 	 */
-	if (sc->sc_protmode != PROT_M_NONE &&
-	    (rt->info[rix].phy == PHY_OFDM ||
-	     rt->info[rix].phy == PHY_HT) &&
-	    (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0) {
+	if (sc->sc_protmode != PROT_M_NONE && !(bf->bf_flags & ATH9K_TXDESC_NOACK)
+	    && (rt->info[rix].phy == WLAN_RC_PHY_OFDM ||
+		WLAN_RC_PHY_HT(rt->info[rix].phy))) {
 		if (sc->sc_protmode == PROT_M_RTSCTS)
 			flags = ATH9K_TXDESC_RTSENA;
 		else if (sc->sc_protmode == PROT_M_CTSONLY)
 			flags = ATH9K_TXDESC_CTSENA;
 
-		cix = rt->info[sc->sc_protrix].controlRate;
+		cix = rt->info[sc->sc_protrix].ctrl_rate;
 		rtsctsena = 1;
 	}
 
-	/* For 11n, the default behavior is to enable RTS for
-	 * hw retried frames. We enable the global flag here and
-	 * let rate series flags determine which rates will actually
-	 * use RTS.
+	/* For 11n, the default behavior is to enable RTS for hw retried frames.
+	 * We enable the global flag here and let rate series flags determine
+	 * which rates will actually use RTS.
 	 */
 	if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) && bf_isdata(bf)) {
-		BUG_ON(!an);
-		/*
-		 * 802.11g protection not needed, use our default behavior
-		 */
+		/* 802.11g protection not needed, use our default behavior */
 		if (!rtsctsena)
 			flags = ATH9K_TXDESC_RTSENA;
-		/*
-		 * For dynamic MIMO PS, RTS needs to precede the first aggregate
-		 * and the second aggregate should have any protection at all.
-		 */
-		if (an->an_smmode == ATH_SM_PWRSAV_DYNAMIC) {
-			if (!bf_isaggrburst(bf)) {
-				flags = ATH9K_TXDESC_RTSENA;
-				dynamic_mimops = 1;
-			} else {
-				flags = 0;
-			}
-		}
 	}
 
-	/*
-	 * Set protection if aggregate protection on
-	 */
+	/* Set protection if aggregate protection on */
 	if (sc->sc_config.ath_aggr_prot &&
 	    (!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) {
 		flags = ATH9K_TXDESC_RTSENA;
-		cix = rt->info[sc->sc_protrix].controlRate;
+		cix = rt->info[sc->sc_protrix].ctrl_rate;
 		rtsctsena = 1;
 	}
 
-	/*
-	 *  For AR5416 - RTS cannot be followed by a frame larger than 8K.
-	 */
-	if (bf_isaggr(bf) && (bf->bf_al > aggr_limit_with_rts)) {
-		/*
-		 * Ensure that in the case of SM Dynamic power save
-		 * while we are bursting the second aggregate the
-		 * RTS is cleared.
-		 */
+	/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
+	if (bf_isaggr(bf) && (bf->bf_al > ah->ah_caps.rts_aggr_limit))
 		flags &= ~(ATH9K_TXDESC_RTSENA);
-	}
 
 	/*
-	 * CTS transmit rate is derived from the transmit rate
-	 * by looking in the h/w rate table.  We must also factor
-	 * in whether or not a short preamble is to be used.
+	 * CTS transmit rate is derived from the transmit rate by looking in the
+	 * h/w rate table.  We must also factor in whether or not a short
+	 * preamble is to be used. NB: cix is set above where RTS/CTS is enabled
 	 */
-	/* NB: cix is set above where RTS/CTS is enabled */
-	BUG_ON(cix == 0xff);
-	ctsrate = rt->info[cix].rateCode |
-		(bf_isshpreamble(bf) ? rt->info[cix].shortPreamble : 0);
-
-	/*
-	 * Setup HAL rate series
-	 */
-	memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
+	ctsrate = rt->info[cix].ratecode |
+		(bf_isshpreamble(bf) ? rt->info[cix].short_preamble : 0);
 
 	for (i = 0; i < 4; i++) {
-		if (!bf->bf_rcs[i].tries)
+		if (!rates[i].count || (rates[i].idx < 0))
 			continue;
 
-		rix = bf->bf_rcs[i].rix;
+		rix = rates[i].idx;
 
-		series[i].Rate = rt->info[rix].rateCode |
-			(bf_isshpreamble(bf) ? rt->info[rix].shortPreamble : 0);
+		series[i].Rate = rt->info[rix].ratecode |
+			(bf_isshpreamble(bf) ? rt->info[rix].short_preamble : 0);
 
-		series[i].Tries = bf->bf_rcs[i].tries;
+		series[i].Tries = rates[i].count;
 
 		series[i].RateFlags = (
-			(bf->bf_rcs[i].flags & ATH_RC_RTSCTS_FLAG) ?
+			(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) ?
 				ATH9K_RATESERIES_RTS_CTS : 0) |
-			((bf->bf_rcs[i].flags & ATH_RC_CW40_FLAG) ?
+			((rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ?
 				ATH9K_RATESERIES_2040 : 0) |
-			((bf->bf_rcs[i].flags & ATH_RC_SGI_FLAG) ?
+			((rates[i].flags & IEEE80211_TX_RC_SHORT_GI) ?
 				ATH9K_RATESERIES_HALFGI : 0);
 
-		series[i].PktDuration = ath_pkt_duration(
-			sc, rix, bf,
-			(bf->bf_rcs[i].flags & ATH_RC_CW40_FLAG) != 0,
-			(bf->bf_rcs[i].flags & ATH_RC_SGI_FLAG),
-			bf_isshpreamble(bf));
+		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),
+			 bf_isshpreamble(bf));
 
-		if ((an->an_smmode == ATH_SM_PWRSAV_STATIC) &&
-		    (bf->bf_rcs[i].flags & ATH_RC_DS_FLAG) == 0) {
-			/*
-			 * When sending to an HT node that has enabled static
-			 * SM/MIMO power save, send at single stream rates but
-			 * use maximum allowed transmit chains per user,
-			 * hardware, regulatory, or country limits for
-			 * better range.
-			 */
-			series[i].ChSel = sc->sc_tx_chainmask;
-		} else {
-			if (bf_isht(bf))
-				series[i].ChSel =
-					ath_chainmask_sel_logic(sc, an);
-			else
-				series[i].ChSel = sc->sc_tx_chainmask;
-		}
+		series[i].ChSel = sc->sc_tx_chainmask;
 
 		if (rtsctsena)
 			series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
-
-		/*
-		 * Set RTS for all rates if node is in dynamic powersave
-		 * mode and we are using dual stream rates.
-		 */
-		if (dynamic_mimops && (bf->bf_rcs[i].flags & ATH_RC_DS_FLAG))
-			series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
-	}
-
-	/*
-	 * For non-HT devices, calculate RTS/CTS duration in software
-	 * and disable multi-rate retry.
-	 */
-	if (flags && !(ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)) {
-		/*
-		 * Compute the transmit duration based on the frame
-		 * size and the size of an ACK frame.  We call into the
-		 * HAL to do the computation since it depends on the
-		 * characteristics of the actual PHY being used.
-		 *
-		 * NB: CTS is assumed the same size as an ACK so we can
-		 *     use the precalculated ACK durations.
-		 */
-		if (flags & ATH9K_TXDESC_RTSENA) {    /* SIFS + CTS */
-			ctsduration += bf_isshpreamble(bf) ?
-				rt->info[cix].spAckDuration :
-				rt->info[cix].lpAckDuration;
-		}
-
-		ctsduration += series[0].PktDuration;
-
-		if ((bf->bf_flags & ATH9K_TXDESC_NOACK) == 0) { /* SIFS + ACK */
-			ctsduration += bf_isshpreamble(bf) ?
-				rt->info[rix].spAckDuration :
-				rt->info[rix].lpAckDuration;
-		}
-
-		/*
-		 * Disable multi-rate retry when using RTS/CTS by clearing
-		 * series 1, 2 and 3.
-		 */
-		memset(&series[1], 0, sizeof(struct ath9k_11n_rate_series) * 3);
 	}
 
-	/*
-	 * set dur_update_en for l-sig computation except for PS-Poll frames
-	 */
-	ath9k_hw_set11n_ratescenario(ah, ds, lastds,
-				     !bf_ispspoll(bf),
-				     ctsrate,
-				     ctsduration,
+	/* set dur_update_en for l-sig computation except for PS-Poll frames */
+	ath9k_hw_set11n_ratescenario(ah, ds, lastds, !bf_ispspoll(bf),
+				     ctsrate, ctsduration,
 				     series, 4, flags);
+
 	if (sc->sc_config.ath_aggr_prot && flags)
 		ath9k_hw_set11n_burstduration(ah, ds, 8192);
 }
@@ -836,27 +678,18 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
  * Function to send a normal HT (non-AMPDU) frame
  * NB: must be called with txq lock held
  */
-
 static int ath_tx_send_normal(struct ath_softc *sc,
 			      struct ath_txq *txq,
 			      struct ath_atx_tid *tid,
 			      struct list_head *bf_head)
 {
 	struct ath_buf *bf;
-	struct sk_buff *skb;
-	struct ieee80211_tx_info *tx_info;
-	struct ath_tx_info_priv *tx_info_priv;
 
 	BUG_ON(list_empty(bf_head));
 
 	bf = list_first_entry(bf_head, struct ath_buf, list);
 	bf->bf_state.bf_type &= ~BUF_AMPDU; /* regular HT frame */
 
-	skb = (struct sk_buff *)bf->bf_mpdu;
-	tx_info = IEEE80211_SKB_CB(skb);
-	tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
-	memcpy(bf->bf_rcs, tx_info_priv->rcs, 4 * sizeof(tx_info_priv->rcs[0]));
-
 	/* update starting sequence number for subsequent ADDBA request */
 	INCR(tid->seq_start, IEEE80211_SEQ_MAX);
 
@@ -873,7 +706,7 @@ static int ath_tx_send_normal(struct ath_softc *sc,
 
 static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 {
-	struct ath_txq *txq = &sc->sc_txq[tid->ac->qnum];
+	struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum];
 	struct ath_buf *bf;
 	struct list_head bf_head;
 	INIT_LIST_HEAD(&bf_head);
@@ -906,8 +739,10 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 				      struct list_head *bf_q,
 				      int txok)
 {
-	struct ath_node *an = bf->bf_node;
-	struct ath_atx_tid *tid = ATH_AN_2_TID(an, bf->bf_tidno);
+	struct ath_node *an = NULL;
+	struct sk_buff *skb;
+	struct ieee80211_tx_info *tx_info;
+	struct ath_atx_tid *tid = NULL;
 	struct ath_buf *bf_last = bf->bf_lastbf;
 	struct ath_desc *ds = bf_last->bf_desc;
 	struct ath_buf *bf_next, *bf_lastq = NULL;
@@ -915,7 +750,14 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 	u16 seq_st = 0;
 	u32 ba[WME_BA_BMP_SIZE >> 5];
 	int isaggr, txfail, txpending, sendbar = 0, needreset = 0;
-	int isnodegone = (an->an_flags & ATH_NODE_CLEAN);
+
+	skb = (struct sk_buff *)bf->bf_mpdu;
+	tx_info = IEEE80211_SKB_CB(skb);
+
+	if (tx_info->control.sta) {
+		an = (struct ath_node *)tx_info->control.sta->drv_priv;
+		tid = ATH_AN_2_TID(an, bf->bf_tidno);
+	}
 
 	isaggr = bf_isaggr(bf);
 	if (isaggr) {
@@ -939,7 +781,8 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 				 * when perform internal reset in this routine.
 				 * Only enable reset in STA mode for now.
 				 */
-				if (sc->sc_ah->ah_opmode == ATH9K_M_STA)
+				if (sc->sc_ah->ah_opmode ==
+					    NL80211_IFTYPE_STATION)
 					needreset = 1;
 			}
 		} else {
@@ -961,7 +804,7 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 			/* transmit completion */
 		} else {
 
-			if (!tid->cleanup_inprogress && !isnodegone &&
+			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);
@@ -1038,18 +881,17 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 				struct ath_buf *tbf;
 
 				/* allocate new descriptor */
-				spin_lock_bh(&sc->sc_txbuflock);
-				ASSERT(!list_empty((&sc->sc_txbuf)));
-				tbf = list_first_entry(&sc->sc_txbuf,
+				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->sc_txbuflock);
+				spin_unlock_bh(&sc->tx.txbuflock);
 
 				ATH_TXBUF_RESET(tbf);
 
 				/* copy descriptor content */
 				tbf->bf_mpdu = bf_last->bf_mpdu;
-				tbf->bf_node = bf_last->bf_node;
 				tbf->bf_buf_addr = bf_last->bf_buf_addr;
 				*(tbf->bf_desc) = *(bf_last->bf_desc);
 
@@ -1090,25 +932,16 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 		bf = bf_next;
 	}
 
-	/*
-	 * node is already gone. no more assocication
-	 * with the node. the node might have been freed
-	 * any  node acces can result in panic.note tid
-	 * is part of the node.
-	 */
-	if (isnodegone)
-		return;
-
-	if (tid->cleanup_inprogress) {
+	if (tid->state & AGGR_CLEANUP) {
 		/* check to see if we're done with cleaning the h/w queue */
 		spin_lock_bh(&txq->axq_lock);
 
 		if (tid->baw_head == tid->baw_tail) {
-			tid->addba_exchangecomplete = 0;
+			tid->state &= ~AGGR_ADDBA_COMPLETE;
 			tid->addba_exchangeattempts = 0;
 			spin_unlock_bh(&txq->axq_lock);
 
-			tid->cleanup_inprogress = false;
+			tid->state &= ~AGGR_CLEANUP;
 
 			/* send buffered frames as singles */
 			ath_tx_flush_tid(sc, tid);
@@ -1136,29 +969,45 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
 	return;
 }
 
+static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, int nbad)
+{
+	struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
+	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+	struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
+
+	tx_info_priv->update_rc = false;
+	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) {
+		if (bf_isdata(bf)) {
+			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;
+			tx_info_priv->update_rc = true;
+		}
+	}
+}
+
 /* Process completed xmit descriptors from the specified queue */
 
-static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
+static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
 {
 	struct ath_hal *ah = sc->sc_ah;
 	struct ath_buf *bf, *lastbf, *bf_held = NULL;
 	struct list_head bf_head;
-	struct ath_desc *ds, *tmp_ds;
-	struct sk_buff *skb;
-	struct ieee80211_tx_info *tx_info;
-	struct ath_tx_info_priv *tx_info_priv;
-	int nacked, txok, nbad = 0, isrifs = 0;
+	struct ath_desc *ds;
+	int txok, nbad = 0;
 	int status;
 
-	DPRINTF(sc, ATH_DBG_QUEUE,
-		"%s: tx queue %d (%x), link %p\n", __func__,
+	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);
 
-	nacked = 0;
 	for (;;) {
 		spin_lock_bh(&txq->axq_lock);
-		txq->axq_intrcnt = 0; /* reset periodic desc intr count */
 		if (list_empty(&txq->axq_q)) {
 			txq->axq_link = NULL;
 			txq->axq_linkbuf = NULL;
@@ -1229,9 +1078,9 @@ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
 
 		if (bf_held) {
 			list_del(&bf_held->list);
-			spin_lock_bh(&sc->sc_txbuflock);
-			list_add_tail(&bf_held->list, &sc->sc_txbuf);
-			spin_unlock_bh(&sc->sc_txbuflock);
+			spin_lock_bh(&sc->tx.txbuflock);
+			list_add_tail(&bf_held->list, &sc->tx.txbuf);
+			spin_unlock_bh(&sc->tx.txbuflock);
 		}
 
 		if (!bf_isampdu(bf)) {
@@ -1246,29 +1095,8 @@ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
 		} else {
 			nbad = ath_tx_num_badfrms(sc, bf, txok);
 		}
-		skb = bf->bf_mpdu;
-		tx_info = IEEE80211_SKB_CB(skb);
-		tx_info_priv = (struct ath_tx_info_priv *)
-			tx_info->driver_data[0];
-		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) {
-			if (ds->ds_txstat.ts_status == 0)
-				nacked++;
-
-			if (bf_isdata(bf)) {
-				if (isrifs)
-					tmp_ds = bf->bf_rifslast->bf_desc;
-				else
-					tmp_ds = ds;
-				memcpy(&tx_info_priv->tx,
-					&tmp_ds->ds_txstat,
-					sizeof(tx_info_priv->tx));
-				tx_info_priv->n_frames = bf->bf_nframes;
-				tx_info_priv->n_bad_frames = nbad;
-			}
-		}
+
+		ath_tx_rc_status(bf, ds, nbad);
 
 		/*
 		 * Complete this transmit unit
@@ -1299,7 +1127,6 @@ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
 			ath_txq_schedule(sc, txq);
 		spin_unlock_bh(&txq->axq_lock);
 	}
-	return nacked;
 }
 
 static void ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq)
@@ -1307,9 +1134,9 @@ static void ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq)
 	struct ath_hal *ah = sc->sc_ah;
 
 	(void) ath9k_hw_stoptxdma(ah, txq->axq_qnum);
-	DPRINTF(sc, ATH_DBG_XMIT, "%s: tx queue [%u] %x, link %p\n",
-		__func__, txq->axq_qnum,
-		ath9k_hw_gettxbuf(ah, txq->axq_qnum), txq->axq_link);
+	DPRINTF(sc, ATH_DBG_XMIT, "tx queue [%u] %x, link %p\n",
+		txq->axq_qnum, ath9k_hw_gettxbuf(ah, txq->axq_qnum),
+		txq->axq_link);
 }
 
 /* Drain only the data queues */
@@ -1317,40 +1144,33 @@ static void ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq)
 static void ath_drain_txdataq(struct ath_softc *sc, bool retry_tx)
 {
 	struct ath_hal *ah = sc->sc_ah;
-	int i;
-	int npend = 0;
+	int i, status, npend = 0;
 
-	/* XXX return value */
 	if (!(sc->sc_flags & SC_OP_INVALID)) {
 		for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 			if (ATH_TXQ_SETUP(sc, i)) {
-				ath_tx_stopdma(sc, &sc->sc_txq[i]);
-
+				ath_tx_stopdma(sc, &sc->tx.txq[i]);
 				/* The TxDMA may not really be stopped.
 				 * Double check the hal tx pending count */
 				npend += ath9k_hw_numtxpending(ah,
-					sc->sc_txq[i].axq_qnum);
+						       sc->tx.txq[i].axq_qnum);
 			}
 		}
 	}
 
 	if (npend) {
-		int status;
-
 		/* TxDMA not stopped, reset the hal */
-		DPRINTF(sc, ATH_DBG_XMIT,
-			"%s: Unable to stop TxDMA. Reset HAL!\n", __func__);
+		DPRINTF(sc, ATH_DBG_XMIT, "Unable to stop TxDMA. Reset HAL!\n");
 
 		spin_lock_bh(&sc->sc_resetlock);
 		if (!ath9k_hw_reset(ah,
 				    sc->sc_ah->ah_curchan,
-				    sc->sc_ht_info.tx_chan_width,
+				    sc->tx_chan_width,
 				    sc->sc_tx_chainmask, sc->sc_rx_chainmask,
 				    sc->sc_ht_extprotspacing, true, &status)) {
 
 			DPRINTF(sc, ATH_DBG_FATAL,
-				"%s: unable to reset hardware; hal status %u\n",
-				__func__,
+				"Unable to reset hardware; hal status %u\n",
 				status);
 		}
 		spin_unlock_bh(&sc->sc_resetlock);
@@ -1358,7 +1178,7 @@ static void ath_drain_txdataq(struct ath_softc *sc, bool retry_tx)
 
 	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 		if (ATH_TXQ_SETUP(sc, i))
-			ath_tx_draintxq(sc, &sc->sc_txq[i], retry_tx);
+			ath_tx_draintxq(sc, &sc->tx.txq[i], retry_tx);
 	}
 }
 
@@ -1390,24 +1210,17 @@ static void ath_tx_addto_baw(struct ath_softc *sc,
  * Function to send an A-MPDU
  * NB: must be called with txq lock held
  */
-
 static int ath_tx_send_ampdu(struct ath_softc *sc,
-			     struct ath_txq *txq,
 			     struct ath_atx_tid *tid,
 			     struct list_head *bf_head,
 			     struct ath_tx_control *txctl)
 {
 	struct ath_buf *bf;
-	struct sk_buff *skb;
-	struct ieee80211_tx_info *tx_info;
-	struct ath_tx_info_priv *tx_info_priv;
 
 	BUG_ON(list_empty(bf_head));
 
 	bf = list_first_entry(bf_head, struct ath_buf, list);
 	bf->bf_state.bf_type |= BUF_AMPDU;
-	bf->bf_seqno = txctl->seqno; /* save seqno and tidno in buffer */
-	bf->bf_tidno = txctl->tidno;
 
 	/*
 	 * Do not queue to h/w when any of the following conditions is true:
@@ -1418,21 +1231,16 @@ static int ath_tx_send_ampdu(struct ath_softc *sc,
 	 */
 	if (!list_empty(&tid->buf_q) || tid->paused ||
 	    !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) ||
-	    txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) {
+	    txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) {
 		/*
 		 * Add this frame to software queue for scheduling later
 		 * for aggregation.
 		 */
 		list_splice_tail_init(bf_head, &tid->buf_q);
-		ath_tx_queue_tid(txq, tid);
+		ath_tx_queue_tid(txctl->txq, tid);
 		return 0;
 	}
 
-	skb = (struct sk_buff *)bf->bf_mpdu;
-	tx_info = IEEE80211_SKB_CB(skb);
-	tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
-	memcpy(bf->bf_rcs, tx_info_priv->rcs, 4 * sizeof(tx_info_priv->rcs[0]));
-
 	/* Add sub-frame to BAW */
 	ath_tx_addto_baw(sc, tid, bf);
 
@@ -1440,7 +1248,8 @@ static int ath_tx_send_ampdu(struct ath_softc *sc,
 	bf->bf_nframes = 1;
 	bf->bf_lastbf = bf->bf_lastfrm; /* one single frame */
 	ath_buf_set_rate(sc, bf);
-	ath_tx_txqaddbuf(sc, txq, bf_head);
+	ath_tx_txqaddbuf(sc, txctl->txq, bf_head);
+
 	return 0;
 }
 
@@ -1448,25 +1257,24 @@ static int ath_tx_send_ampdu(struct ath_softc *sc,
  * looks up the rate
  * returns aggr limit based on lowest of the rates
  */
-
 static u32 ath_lookup_rate(struct ath_softc *sc,
-				 struct ath_buf *bf)
+			   struct ath_buf *bf,
+			   struct ath_atx_tid *tid)
 {
-	const struct ath9k_rate_table *rt = sc->sc_currates;
+	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, frame_length;
 	u16 aggr_limit, legacy = 0, maxampdu;
 	int i;
 
-
 	skb = (struct sk_buff *)bf->bf_mpdu;
 	tx_info = IEEE80211_SKB_CB(skb);
-	tx_info_priv = (struct ath_tx_info_priv *)
-		tx_info->driver_data[0];
-	memcpy(bf->bf_rcs,
-		tx_info_priv->rcs, 4 * sizeof(tx_info_priv->rcs[0]));
+	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
@@ -1476,14 +1284,14 @@ static u32 ath_lookup_rate(struct ath_softc *sc,
 	max_4ms_framelen = ATH_AMPDU_LIMIT_MAX;
 
 	for (i = 0; i < 4; i++) {
-		if (bf->bf_rcs[i].tries) {
-			frame_length = bf->bf_rcs[i].max_4ms_framelen;
-
-			if (rt->info[bf->bf_rcs[i].rix].phy != PHY_HT) {
+		if (rates[i].count) {
+			if (!WLAN_RC_PHY_HT(rate_table->info[rates[i].idx].phy)) {
 				legacy = 1;
 				break;
 			}
 
+			frame_length =
+				rate_table->info[rates[i].idx].max_4ms_framelen;
 			max_4ms_framelen = min(max_4ms_framelen, frame_length);
 		}
 	}
@@ -1504,7 +1312,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc,
 	 * The IE, however can hold upto 65536, which shows up here
 	 * as zero. Ignore 65536 since we  are constrained by hw.
 	 */
-	maxampdu = sc->sc_ht_info.maxampdu;
+	maxampdu = tid->an->maxampdu;
 	if (maxampdu)
 		aggr_limit = min(aggr_limit, maxampdu);
 
@@ -1516,12 +1324,14 @@ static u32 ath_lookup_rate(struct ath_softc *sc,
  * 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)
 {
-	const struct ath9k_rate_table *rt = sc->sc_currates;
+	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;
@@ -1545,7 +1355,7 @@ static int ath_compute_num_delims(struct ath_softc *sc,
 	 * required minimum length for subframe. Take into account
 	 * whether high rate is 20 or 40Mhz and half or full GI.
 	 */
-	mpdudensity = sc->sc_ht_info.mpdudensity;
+	mpdudensity = tid->an->mpdudensity;
 
 	/*
 	 * If there is no mpdu density restriction, no further calculation
@@ -1554,11 +1364,11 @@ static int ath_compute_num_delims(struct ath_softc *sc,
 	if (mpdudensity == 0)
 		return ndelim;
 
-	rix = bf->bf_rcs[0].rix;
-	flags = bf->bf_rcs[0].flags;
-	rc = rt->info[rix].rateCode;
-	width = (flags & ATH_RC_CW40_FLAG) ? 1 : 0;
-	half_gi = (flags & ATH_RC_SGI_FLAG) ? 1 : 0;
+	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);
@@ -1585,7 +1395,6 @@ static int ath_compute_num_delims(struct ath_softc *sc,
  * For aggregation from software buffer queue.
  * NB: must be called with txq lock held
  */
-
 static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
 					struct ath_atx_tid *tid,
 					struct list_head *bf_q,
@@ -1600,7 +1409,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
 	u16 aggr_limit = 0, al = 0, bpad = 0,
 		al_delta, h_baw = tid->baw_size / 2;
 	enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
-	int prev_al = 0, is_ds_rate = 0;
+	int prev_al = 0;
 	INIT_LIST_HEAD(&bf_head);
 
 	BUG_ON(list_empty(&tid->buf_q));
@@ -1619,13 +1428,8 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
 		}
 
 		if (!rl) {
-			aggr_limit = ath_lookup_rate(sc, bf);
+			aggr_limit = ath_lookup_rate(sc, bf, tid);
 			rl = 1;
-			/*
-			 * Is rate dual stream
-			 */
-			is_ds_rate =
-				(bf->bf_rcs[0].flags & ATH_RC_DS_FLAG) ? 1 : 0;
 		}
 
 		/*
@@ -1657,7 +1461,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
 		 * Get the delimiters needed to meet the MPDU
 		 * density for this node.
 		 */
-		ndelim = ath_compute_num_delims(sc, bf_first, bf->bf_frmlen);
+		ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen);
 
 		bpad = PADBYTES(al_delta) + (ndelim << 2);
 
@@ -1713,7 +1517,6 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
  * process pending frames possibly doing a-mpdu aggregation
  * NB: must be called with txq lock held
  */
-
 static void ath_tx_sched_aggr(struct ath_softc *sc,
 	struct ath_txq *txq, struct ath_atx_tid *tid)
 {
@@ -1799,8 +1602,8 @@ static void ath_tx_sched_aggr(struct ath_softc *sc,
 
 static void ath_tid_drain(struct ath_softc *sc,
 			  struct ath_txq *txq,
-			  struct ath_atx_tid *tid,
-			  bool bh_flag)
+			  struct ath_atx_tid *tid)
+
 {
 	struct ath_buf *bf;
 	struct list_head bf_head;
@@ -1821,18 +1624,12 @@ static void ath_tid_drain(struct ath_softc *sc,
 		 * do not indicate packets while holding txq spinlock.
 		 * unlock is intentional here
 		 */
-		if (likely(bh_flag))
-			spin_unlock_bh(&txq->axq_lock);
-		else
-			spin_unlock(&txq->axq_lock);
+		spin_unlock(&txq->axq_lock);
 
 		/* complete this sub-frame */
 		ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
 
-		if (likely(bh_flag))
-			spin_lock_bh(&txq->axq_lock);
-		else
-			spin_lock(&txq->axq_lock);
+		spin_lock(&txq->axq_lock);
 	}
 
 	/*
@@ -1849,10 +1646,8 @@ static void ath_tid_drain(struct ath_softc *sc,
  * Drain all pending buffers
  * NB: must be called with txq lock held
  */
-
 static void ath_txq_drain_pending_buffers(struct ath_softc *sc,
-					  struct ath_txq *txq,
-					  bool bh_flag)
+					  struct ath_txq *txq)
 {
 	struct ath_atx_ac *ac, *ac_tmp;
 	struct ath_atx_tid *tid, *tid_tmp;
@@ -1863,51 +1658,33 @@ static void ath_txq_drain_pending_buffers(struct ath_softc *sc,
 		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, bh_flag);
+			ath_tid_drain(sc, txq, tid);
 		}
 	}
 }
 
-static int ath_tx_start_dma(struct ath_softc *sc,
-			    struct sk_buff *skb,
-			    struct scatterlist *sg,
-			    u32 n_sg,
-			    struct ath_tx_control *txctl)
+static int ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
+				struct sk_buff *skb,
+				struct ath_tx_control *txctl)
 {
-	struct ath_node *an = txctl->an;
-	struct ath_buf *bf = NULL;
-	struct list_head bf_head;
-	struct ath_desc *ds;
-	struct ath_hal *ah = sc->sc_ah;
-	struct ath_txq *txq;
-	struct ath_tx_info_priv *tx_info_priv;
-	struct ath_rc_series *rcs;
+	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct ieee80211_tx_info *tx_info =  IEEE80211_SKB_CB(skb);
-	__le16 fc = hdr->frame_control;
-
-	if (unlikely(txctl->flags & ATH9K_TXDESC_CAB))
-		txq = sc->sc_cabq;
-	else
-		txq = &sc->sc_txq[txctl->qnum];
+	struct ath_tx_info_priv *tx_info_priv;
+	int hdrlen;
+	__le16 fc;
 
-	/* For each sglist entry, allocate an ath_buf for DMA */
-	INIT_LIST_HEAD(&bf_head);
-	spin_lock_bh(&sc->sc_txbuflock);
-	if (unlikely(list_empty(&sc->sc_txbuf))) {
-		spin_unlock_bh(&sc->sc_txbuflock);
+	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;
+	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
+	fc = hdr->frame_control;
 
-	bf = list_first_entry(&sc->sc_txbuf, struct ath_buf, list);
-	list_del(&bf->list);
-	spin_unlock_bh(&sc->sc_txbuflock);
+	ATH_TXBUF_RESET(bf);
 
-	list_add_tail(&bf->list, &bf_head);
+	/* Frame type */
 
-	/* set up this buffer */
-	ATH_TXBUF_RESET(bf);
-	bf->bf_frmlen = txctl->frmlen;
+	bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3);
 
 	ieee80211_is_data(fc) ?
 		(bf->bf_state.bf_type |= BUF_DATA) :
@@ -1921,120 +1698,158 @@ static int ath_tx_start_dma(struct ath_softc *sc,
 	(sc->sc_flags & SC_OP_PREAMBLE_SHORT) ?
 		(bf->bf_state.bf_type |= BUF_SHORT_PREAMBLE) :
 		(bf->bf_state.bf_type &= ~BUF_SHORT_PREAMBLE);
+	(sc->hw->conf.ht.enabled && !is_pae(skb) &&
+	 (tx_info->flags & IEEE80211_TX_CTL_AMPDU)) ?
+		(bf->bf_state.bf_type |= BUF_HT) :
+		(bf->bf_state.bf_type &= ~BUF_HT);
+
+	bf->bf_flags = setup_tx_flags(sc, skb, txctl->txq);
+
+	/* Crypto */
+
+	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;
+	}
+
+	/* Assign seqno, tidno */
+
+	if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR))
+		assign_aggr_tid_seqno(skb, bf);
+
+	/* DMA setup */
 
-	bf->bf_flags = txctl->flags;
-	bf->bf_keytype = txctl->keytype;
-	tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
-	rcs = tx_info_priv->rcs;
-	bf->bf_rcs[0] = rcs[0];
-	bf->bf_rcs[1] = rcs[1];
-	bf->bf_rcs[2] = rcs[2];
-	bf->bf_rcs[3] = rcs[3];
-	bf->bf_node = an;
 	bf->bf_mpdu = skb;
-	bf->bf_buf_addr = sg_dma_address(sg);
+
+	bf->bf_dmacontext = pci_map_single(sc->pdev, skb->data,
+					   skb->len, PCI_DMA_TODEVICE);
+	if (unlikely(pci_dma_mapping_error(sc->pdev, bf->bf_dmacontext))) {
+		bf->bf_mpdu = NULL;
+		DPRINTF(sc, ATH_DBG_CONFIG,
+			"pci_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 = (struct sk_buff *)bf->bf_mpdu;
+	struct ieee80211_tx_info *tx_info =  IEEE80211_SKB_CB(skb);
+	struct ath_node *an = NULL;
+	struct list_head bf_head;
+	struct ath_desc *ds;
+	struct ath_atx_tid *tid;
+	struct ath_hal *ah = sc->sc_ah;
+	int frm_type;
+
+	frm_type = get_hw_packet_type(skb);
+
+	INIT_LIST_HEAD(&bf_head);
+	list_add_tail(&bf->list, &bf_head);
 
 	/* setup descriptor */
+
 	ds = bf->bf_desc;
 	ds->ds_link = 0;
 	ds->ds_data = bf->bf_buf_addr;
 
-	/*
-	 * Save the DMA context in the first ath_buf
-	 */
-	bf->bf_dmacontext = txctl->dmacontext;
+	/* Formulate first tx descriptor with tx controls */
 
-	/*
-	 * Formulate first tx descriptor with tx controls.
-	 */
-	ath9k_hw_set11n_txdesc(ah,
-			       ds,
-			       bf->bf_frmlen, /* frame length */
-			       txctl->atype, /* Atheros packet type */
-			       min(txctl->txpower, (u16)60), /* txpower */
-			       txctl->keyix,            /* key cache index */
-			       txctl->keytype,          /* key type */
-			       txctl->flags);           /* flags */
-	ath9k_hw_filltxdesc(ah,
-			    ds,
-			    sg_dma_len(sg),     /* segment length */
-			    true,            /* first segment */
-			    (n_sg == 1) ? true : false, /* last segment */
-			    ds);                /* first descriptor */
+	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 */
 
 	bf->bf_lastfrm = bf;
-	(txctl->ht) ?
-		(bf->bf_state.bf_type |= BUF_HT) :
-		(bf->bf_state.bf_type &= ~BUF_HT);
 
-	spin_lock_bh(&txq->axq_lock);
+	spin_lock_bh(&txctl->txq->axq_lock);
 
-	if (txctl->ht && (sc->sc_flags & SC_OP_TXAGGR)) {
-		struct ath_atx_tid *tid = ATH_AN_2_TID(an, txctl->tidno);
-		if (ath_aggr_query(sc, an, txctl->tidno)) {
+	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 (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, txq, tid, &bf_head, txctl);
+			ath_tx_send_ampdu(sc, tid, &bf_head, txctl);
 		} else {
 			/*
-			 * Send this frame as regular when ADDBA exchange
-			 * is neither complete nor pending.
+			 * Send this frame as regular when ADDBA
+			 * exchange is neither complete nor pending.
 			 */
-			ath_tx_send_normal(sc, txq, tid, &bf_head);
+			ath_tx_send_normal(sc, txctl->txq,
+					   tid, &bf_head);
 		}
 	} else {
 		bf->bf_lastbf = bf;
 		bf->bf_nframes = 1;
-		ath_buf_set_rate(sc, bf);
-
-		if (ieee80211_is_back_req(fc)) {
-			/* This is required for resuming tid
-			 * during BAR completion */
-			bf->bf_tidno = txctl->tidno;
-		}
 
-		ath_tx_txqaddbuf(sc, txq, &bf_head);
+		ath_buf_set_rate(sc, bf);
+		ath_tx_txqaddbuf(sc, txctl->txq, &bf_head);
 	}
-	spin_unlock_bh(&txq->axq_lock);
-	return 0;
+
+	spin_unlock_bh(&txctl->txq->axq_lock);
 }
 
-static void xmit_map_sg(struct ath_softc *sc,
-			struct sk_buff *skb,
-			struct ath_tx_control *txctl)
+/* Upon failure caller should free skb */
+int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb,
+		 struct ath_tx_control *txctl)
 {
-	struct ath_xmit_status tx_status;
-	struct ath_atx_tid *tid;
-	struct scatterlist sg;
+	struct ath_buf *bf;
+	int r;
 
-	txctl->dmacontext = pci_map_single(sc->pdev, skb->data,
-					   skb->len, PCI_DMA_TODEVICE);
+	/* Check if a tx buffer is available */
 
-	/* setup S/G list */
-	memset(&sg, 0, sizeof(struct scatterlist));
-	sg_dma_address(&sg) = txctl->dmacontext;
-	sg_dma_len(&sg) = skb->len;
+	bf = ath_tx_get_buffer(sc);
+	if (!bf) {
+		DPRINTF(sc, ATH_DBG_XMIT, "TX buffers are full\n");
+		return -1;
+	}
 
-	if (ath_tx_start_dma(sc, skb, &sg, 1, txctl) != 0) {
-		/*
-		 *  We have to do drop frame here.
-		 */
-		pci_unmap_single(sc->pdev, txctl->dmacontext,
-				 skb->len, PCI_DMA_TODEVICE);
+	r = ath_tx_setup_buffer(sc, bf, skb, txctl);
+	if (unlikely(r)) {
+		struct ath_txq *txq = txctl->txq;
 
-		tx_status.retries = 0;
-		tx_status.flags = ATH_TX_ERROR;
+		DPRINTF(sc, ATH_DBG_FATAL, "TX mem alloc failure\n");
 
-		if (txctl->ht && (sc->sc_flags & SC_OP_TXAGGR)) {
-			/* Reclaim the seqno. */
-			tid = ATH_AN_2_TID((struct ath_node *)
-				txctl->an, txctl->tidno);
-			DECR(tid->seq_next, IEEE80211_SEQ_MAX);
+		/* 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 (ath_txq_depth(sc, txq->axq_qnum) > 1) {
+			ieee80211_stop_queue(sc->hw,
+				skb_get_queue_mapping(skb));
+			txq->stopped = 1;
 		}
-		ath_tx_complete(sc, skb, &tx_status, txctl->an);
+		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;
 }
 
 /* Initialize TX queue and h/w */
@@ -2044,26 +1859,25 @@ int ath_tx_init(struct ath_softc *sc, int nbufs)
 	int error = 0;
 
 	do {
-		spin_lock_init(&sc->sc_txbuflock);
+		spin_lock_init(&sc->tx.txbuflock);
 
 		/* Setup tx descriptors */
-		error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf,
+		error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf,
 			"tx", nbufs, 1);
 		if (error != 0) {
 			DPRINTF(sc, ATH_DBG_FATAL,
-				"%s: failed to allocate tx descriptors: %d\n",
-				__func__, error);
+				"Failed to allocate tx descriptors: %d\n",
+				error);
 			break;
 		}
 
 		/* XXX allocate beacon state together with vap */
-		error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf,
+		error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf,
 					  "beacon", ATH_BCBUF, 1);
 		if (error != 0) {
 			DPRINTF(sc, ATH_DBG_FATAL,
-				"%s: failed to allocate "
-				"beacon descripotrs: %d\n",
-				__func__, error);
+				"Failed to allocate beacon descriptors: %d\n",
+				error);
 			break;
 		}
 
@@ -2080,12 +1894,12 @@ int ath_tx_init(struct ath_softc *sc, int nbufs)
 int ath_tx_cleanup(struct ath_softc *sc)
 {
 	/* cleanup beacon descriptors */
-	if (sc->sc_bdma.dd_desc_len != 0)
-		ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf);
+	if (sc->beacon.bdma.dd_desc_len != 0)
+		ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf);
 
 	/* cleanup tx descriptors */
-	if (sc->sc_txdma.dd_desc_len != 0)
-		ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf);
+	if (sc->tx.txdma.dd_desc_len != 0)
+		ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf);
 
 	return 0;
 }
@@ -2133,15 +1947,15 @@ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
 		 */
 		return NULL;
 	}
-	if (qnum >= ARRAY_SIZE(sc->sc_txq)) {
+	if (qnum >= ARRAY_SIZE(sc->tx.txq)) {
 		DPRINTF(sc, ATH_DBG_FATAL,
-			"%s: hal qnum %u out of range, max %u!\n",
-			__func__, qnum, (unsigned int)ARRAY_SIZE(sc->sc_txq));
+			"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->sc_txq[qnum];
+		struct ath_txq *txq = &sc->tx.txq[qnum];
 
 		txq->axq_qnum = qnum;
 		txq->axq_link = NULL;
@@ -2151,11 +1965,10 @@ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
 		txq->axq_depth = 0;
 		txq->axq_aggr_depth = 0;
 		txq->axq_totalqueued = 0;
-		txq->axq_intrcnt = 0;
 		txq->axq_linkbuf = NULL;
-		sc->sc_txqsetup |= 1<<qnum;
+		sc->tx.txqsetup |= 1<<qnum;
 	}
-	return &sc->sc_txq[qnum];
+	return &sc->tx.txq[qnum];
 }
 
 /* Reclaim resources for a setup queue */
@@ -2163,7 +1976,7 @@ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
 void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq)
 {
 	ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum);
-	sc->sc_txqsetup &= ~(1<<txq->axq_qnum);
+	sc->tx.txqsetup &= ~(1<<txq->axq_qnum);
 }
 
 /*
@@ -2180,15 +1993,15 @@ int ath_tx_setup(struct ath_softc *sc, int haltype)
 {
 	struct ath_txq *txq;
 
-	if (haltype >= ARRAY_SIZE(sc->sc_haltype2q)) {
+	if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) {
 		DPRINTF(sc, ATH_DBG_FATAL,
-			"%s: HAL AC %u out of range, max %zu!\n",
-			__func__, haltype, ARRAY_SIZE(sc->sc_haltype2q));
+			"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->sc_haltype2q[haltype] = txq->axq_qnum;
+		sc->tx.hwq_map[haltype] = txq->axq_qnum;
 		return 1;
 	} else
 		return 0;
@@ -2200,20 +2013,19 @@ int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
 
 	switch (qtype) {
 	case ATH9K_TX_QUEUE_DATA:
-		if (haltype >= ARRAY_SIZE(sc->sc_haltype2q)) {
+		if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) {
 			DPRINTF(sc, ATH_DBG_FATAL,
-				"%s: HAL AC %u out of range, max %zu!\n",
-				__func__,
-				haltype, ARRAY_SIZE(sc->sc_haltype2q));
+				"HAL AC %u out of range, max %zu!\n",
+				haltype, ARRAY_SIZE(sc->tx.hwq_map));
 			return -1;
 		}
-		qnum = sc->sc_haltype2q[haltype];
+		qnum = sc->tx.hwq_map[haltype];
 		break;
 	case ATH9K_TX_QUEUE_BEACON:
-		qnum = sc->sc_bhalq;
+		qnum = sc->beacon.beaconq;
 		break;
 	case ATH9K_TX_QUEUE_CAB:
-		qnum = sc->sc_cabq->axq_qnum;
+		qnum = sc->beacon.cabq->axq_qnum;
 		break;
 	default:
 		qnum = -1;
@@ -2221,6 +2033,34 @@ int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
 	return qnum;
 }
 
+/* Get a transmit queue, if available */
+
+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);
+
+	/* Try to avoid running out of descriptors */
+	if (txq->axq_depth >= (ATH_TXBUF - 20)) {
+		DPRINTF(sc, ATH_DBG_FATAL,
+			"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;
+}
+
 /* Update parameters for a transmit queue */
 
 int ath_txq_update(struct ath_softc *sc, int qnum,
@@ -2230,17 +2070,17 @@ int ath_txq_update(struct ath_softc *sc, int qnum,
 	int error = 0;
 	struct ath9k_tx_queue_info qi;
 
-	if (qnum == sc->sc_bhalq) {
+	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->sc_beacon_qi = *qinfo;
+		sc->beacon.beacon_qi = *qinfo;
 		return 0;
 	}
 
-	ASSERT(sc->sc_txq[qnum].axq_qnum == qnum);
+	ASSERT(sc->tx.txq[qnum].axq_qnum == qnum);
 
 	ath9k_hw_get_txq_props(ah, qnum, &qi);
 	qi.tqi_aifs = qinfo->tqi_aifs;
@@ -2251,8 +2091,7 @@ int ath_txq_update(struct ath_softc *sc, int qnum,
 
 	if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) {
 		DPRINTF(sc, ATH_DBG_FATAL,
-			"%s: unable to update hardware queue %u!\n",
-			__func__, qnum);
+			"Unable to update hardware queue %u!\n", qnum);
 		error = -EIO;
 	} else {
 		ath9k_hw_resettxqueue(ah, qnum); /* push to h/w */
@@ -2264,7 +2103,7 @@ int ath_txq_update(struct ath_softc *sc, int qnum,
 int ath_cabq_update(struct ath_softc *sc)
 {
 	struct ath9k_tx_queue_info qi;
-	int qnum = sc->sc_cabq->axq_qnum;
+	int qnum = sc->beacon.cabq->axq_qnum;
 	struct ath_beacon_config conf;
 
 	ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi);
@@ -2284,27 +2123,6 @@ int ath_cabq_update(struct ath_softc *sc)
 	return 0;
 }
 
-int ath_tx_start(struct ath_softc *sc, struct sk_buff *skb)
-{
-	struct ath_tx_control txctl;
-	int error = 0;
-
-	memset(&txctl, 0, sizeof(struct ath_tx_control));
-	error = ath_tx_prepare(sc, skb, &txctl);
-	if (error == 0)
-		/*
-		 * Start DMA mapping.
-		 * ath_tx_start_dma() will be called either synchronously
-		 * or asynchrounsly once DMA is complete.
-		 */
-		xmit_map_sg(sc, skb, &txctl);
-	else
-		ath_node_put(sc, txctl.an, ATH9K_BH_STATUS_CHANGE);
-
-	/* failed packets will be dropped by the caller */
-	return error;
-}
-
 /* Deferred processing of transmit interrupt */
 
 void ath_tx_tasklet(struct ath_softc *sc)
@@ -2319,7 +2137,7 @@ void ath_tx_tasklet(struct ath_softc *sc)
 	 */
 	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 		if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i)))
-			ath_tx_processq(sc, &sc->sc_txq[i]);
+			ath_tx_processq(sc, &sc->tx.txq[i]);
 	}
 }
 
@@ -2351,9 +2169,9 @@ void ath_tx_draintxq(struct ath_softc *sc,
 			list_del(&bf->list);
 			spin_unlock_bh(&txq->axq_lock);
 
-			spin_lock_bh(&sc->sc_txbuflock);
-			list_add_tail(&bf->list, &sc->sc_txbuf);
-			spin_unlock_bh(&sc->sc_txbuflock);
+			spin_lock_bh(&sc->tx.txbuflock);
+			list_add_tail(&bf->list, &sc->tx.txbuf);
+			spin_unlock_bh(&sc->tx.txbuflock);
 			continue;
 		}
 
@@ -2378,8 +2196,7 @@ void ath_tx_draintxq(struct ath_softc *sc,
 	if (sc->sc_flags & SC_OP_TXAGGR) {
 		if (!retry_tx) {
 			spin_lock_bh(&txq->axq_lock);
-			ath_txq_drain_pending_buffers(sc, txq,
-				ATH9K_BH_STATUS_CHANGE);
+			ath_txq_drain_pending_buffers(sc, txq);
 			spin_unlock_bh(&txq->axq_lock);
 		}
 	}
@@ -2392,9 +2209,9 @@ void ath_draintxq(struct ath_softc *sc, bool retry_tx)
 	/* stop beacon queue. The beacon will be freed when
 	 * we go to INIT state */
 	if (!(sc->sc_flags & SC_OP_INVALID)) {
-		(void) ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
-		DPRINTF(sc, ATH_DBG_XMIT, "%s: beacon queue %x\n", __func__,
-			ath9k_hw_gettxbuf(sc->sc_ah, sc->sc_bhalq));
+		(void) ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
+		DPRINTF(sc, ATH_DBG_XMIT, "beacon queue %x\n",
+			ath9k_hw_gettxbuf(sc->sc_ah, sc->beacon.beaconq));
 	}
 
 	ath_drain_txdataq(sc, retry_tx);
@@ -2402,72 +2219,47 @@ void ath_draintxq(struct ath_softc *sc, bool retry_tx)
 
 u32 ath_txq_depth(struct ath_softc *sc, int qnum)
 {
-	return sc->sc_txq[qnum].axq_depth;
+	return sc->tx.txq[qnum].axq_depth;
 }
 
 u32 ath_txq_aggr_depth(struct ath_softc *sc, int qnum)
 {
-	return sc->sc_txq[qnum].axq_aggr_depth;
+	return sc->tx.txq[qnum].axq_aggr_depth;
 }
 
-/* Check if an ADDBA is required. A valid node must be passed. */
-enum ATH_AGGR_CHECK ath_tx_aggr_check(struct ath_softc *sc,
-				      struct ath_node *an,
-				      u8 tidno)
+bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno)
 {
 	struct ath_atx_tid *txtid;
-	DECLARE_MAC_BUF(mac);
 
 	if (!(sc->sc_flags & SC_OP_TXAGGR))
-		return AGGR_NOT_REQUIRED;
+		return false;
 
-	/* ADDBA exchange must be completed before sending aggregates */
 	txtid = ATH_AN_2_TID(an, tidno);
 
-	if (txtid->addba_exchangecomplete)
-		return AGGR_EXCHANGE_DONE;
-
-	if (txtid->cleanup_inprogress)
-		return AGGR_CLEANUP_PROGRESS;
-
-	if (txtid->addba_exchangeinprogress)
-		return AGGR_EXCHANGE_PROGRESS;
-
-	if (!txtid->addba_exchangecomplete) {
-		if (!txtid->addba_exchangeinprogress &&
+	if (!(txtid->state & AGGR_ADDBA_COMPLETE)) {
+		if (!(txtid->state & AGGR_ADDBA_PROGRESS) &&
 		    (txtid->addba_exchangeattempts < ADDBA_EXCHANGE_ATTEMPTS)) {
 			txtid->addba_exchangeattempts++;
-			return AGGR_REQUIRED;
+			return true;
 		}
 	}
 
-	return AGGR_NOT_REQUIRED;
+	return false;
 }
 
 /* Start TX aggregation */
 
-int ath_tx_aggr_start(struct ath_softc *sc,
-		      const u8 *addr,
-		      u16 tid,
-		      u16 *ssn)
+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;
 
-	spin_lock_bh(&sc->node_lock);
-	an = ath_node_find(sc, (u8 *) addr);
-	spin_unlock_bh(&sc->node_lock);
-
-	if (!an) {
-		DPRINTF(sc, ATH_DBG_AGGR,
-			"%s: Node not found to initialize "
-			"TX aggregation\n", __func__);
-		return -1;
-	}
+	an = (struct ath_node *)sta->drv_priv;
 
 	if (sc->sc_flags & SC_OP_TXAGGR) {
 		txtid = ATH_AN_2_TID(an, tid);
-		txtid->addba_exchangeinprogress = 1;
+		txtid->state |= AGGR_ADDBA_PROGRESS;
 		ath_tx_pause_tid(sc, txtid);
 	}
 
@@ -2476,24 +2268,31 @@ int ath_tx_aggr_start(struct ath_softc *sc,
 
 /* Stop tx aggregation */
 
-int ath_tx_aggr_stop(struct ath_softc *sc,
-		     const u8 *addr,
-		     u16 tid)
+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;
+
+	ath_tx_aggr_teardown(sc, an, tid);
+	return 0;
+}
+
+/* Resume tx aggregation */
+
+void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid)
+{
+	struct ath_atx_tid *txtid;
 	struct ath_node *an;
 
-	spin_lock_bh(&sc->node_lock);
-	an = ath_node_find(sc, (u8 *) addr);
-	spin_unlock_bh(&sc->node_lock);
+	an = (struct ath_node *)sta->drv_priv;
 
-	if (!an) {
-		DPRINTF(sc, ATH_DBG_AGGR,
-			"%s: TX aggr stop for non-existent node\n", __func__);
-		return -1;
+	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);
 	}
-
-	ath_tx_aggr_teardown(sc, an, tid);
-	return 0;
 }
 
 /*
@@ -2503,21 +2302,18 @@ int ath_tx_aggr_stop(struct ath_softc *sc,
  * - Discard all retry frames from the s/w queue.
  */
 
-void ath_tx_aggr_teardown(struct ath_softc *sc,
-	struct ath_node *an, u8 tid)
+void ath_tx_aggr_teardown(struct ath_softc *sc, struct ath_node *an, u8 tid)
 {
 	struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid);
-	struct ath_txq *txq = &sc->sc_txq[txtid->ac->qnum];
+	struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum];
 	struct ath_buf *bf;
 	struct list_head bf_head;
 	INIT_LIST_HEAD(&bf_head);
 
-	DPRINTF(sc, ATH_DBG_AGGR, "%s: teardown TX aggregation\n", __func__);
-
-	if (txtid->cleanup_inprogress) /* cleanup is in progress */
+	if (txtid->state & AGGR_CLEANUP) /* cleanup is in progress */
 		return;
 
-	if (!txtid->addba_exchangecomplete) {
+	if (!(txtid->state & AGGR_ADDBA_COMPLETE)) {
 		txtid->addba_exchangeattempts = 0;
 		return;
 	}
@@ -2547,9 +2343,9 @@ void ath_tx_aggr_teardown(struct ath_softc *sc,
 
 	if (txtid->baw_head != txtid->baw_tail) {
 		spin_unlock_bh(&txq->axq_lock);
-		txtid->cleanup_inprogress = true;
+		txtid->state |= AGGR_CLEANUP;
 	} else {
-		txtid->addba_exchangecomplete = 0;
+		txtid->state &= ~AGGR_ADDBA_COMPLETE;
 		txtid->addba_exchangeattempts = 0;
 		spin_unlock_bh(&txq->axq_lock);
 		ath_tx_flush_tid(sc, txtid);
@@ -2591,10 +2387,8 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
 		if (tid->paused)    /* check next tid to keep h/w busy */
 			continue;
 
-		if (!(tid->an->an_smmode == ATH_SM_PWRSAV_DYNAMIC) ||
-		    ((txq->axq_depth % 2) == 0)) {
+		if ((txq->axq_depth % 2) == 0)
 			ath_tx_sched_aggr(sc, txq, tid);
-		}
 
 		/*
 		 * add tid to round-robin queue if more frames
@@ -2625,72 +2419,67 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
 
 void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an)
 {
-	if (sc->sc_flags & SC_OP_TXAGGR) {
-		struct ath_atx_tid *tid;
-		struct ath_atx_ac *ac;
-		int tidno, acno;
-
-		sc->sc_ht_info.maxampdu = ATH_AMPDU_LIMIT_DEFAULT;
+	struct ath_atx_tid *tid;
+	struct ath_atx_ac *ac;
+	int tidno, acno;
 
-		/*
-		 * Init per tid tx state
-		 */
-		for (tidno = 0, tid = &an->an_aggr.tx.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->cleanup_inprogress = false;
-			INIT_LIST_HEAD(&tid->buf_q);
-
-			acno = TID_TO_WME_AC(tidno);
-			tid->ac = &an->an_aggr.tx.ac[acno];
-
-			/* ADDBA state */
-			tid->addba_exchangecomplete     = 0;
-			tid->addba_exchangeinprogress   = 0;
-			tid->addba_exchangeattempts     = 0;
-		}
+	/*
+	 * Init per tid tx state
+	 */
+	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];
+
+		/* ADDBA state */
+		tid->state &= ~AGGR_ADDBA_COMPLETE;
+		tid->state &= ~AGGR_ADDBA_PROGRESS;
+		tid->addba_exchangeattempts = 0;
+	}
 
-		/*
-		 * Init per ac tx state
-		 */
-		for (acno = 0, ac = &an->an_aggr.tx.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;
-			}
+	/*
+	 * Init per ac tx state
+	 */
+	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;
 		}
 	}
 }
 
 /* Cleanupthe pending buffers for the node. */
 
-void ath_tx_node_cleanup(struct ath_softc *sc,
-	struct ath_node *an, bool bh_flag)
+void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an)
 {
 	int i;
 	struct ath_atx_ac *ac, *ac_tmp;
@@ -2698,12 +2487,9 @@ void ath_tx_node_cleanup(struct ath_softc *sc,
 	struct ath_txq *txq;
 	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
 		if (ATH_TXQ_SETUP(sc, i)) {
-			txq = &sc->sc_txq[i];
+			txq = &sc->tx.txq[i];
 
-			if (likely(bh_flag))
-				spin_lock_bh(&txq->axq_lock);
-			else
-				spin_lock(&txq->axq_lock);
+			spin_lock(&txq->axq_lock);
 
 			list_for_each_entry_safe(ac,
 					ac_tmp, &txq->axq_acq, list) {
@@ -2718,36 +2504,14 @@ void ath_tx_node_cleanup(struct ath_softc *sc,
 						tid_tmp, &ac->tid_q, list) {
 					list_del(&tid->list);
 					tid->sched = false;
-					ath_tid_drain(sc, txq, tid, bh_flag);
-					tid->addba_exchangecomplete = 0;
+					ath_tid_drain(sc, txq, tid);
+					tid->state &= ~AGGR_ADDBA_COMPLETE;
 					tid->addba_exchangeattempts = 0;
-					tid->cleanup_inprogress = false;
+					tid->state &= ~AGGR_CLEANUP;
 				}
 			}
 
-			if (likely(bh_flag))
-				spin_unlock_bh(&txq->axq_lock);
-			else
-				spin_unlock(&txq->axq_lock);
-		}
-	}
-}
-
-/* Cleanup per node transmit state */
-
-void ath_tx_node_free(struct ath_softc *sc, struct ath_node *an)
-{
-	if (sc->sc_flags & SC_OP_TXAGGR) {
-		struct ath_atx_tid *tid;
-		int tidno, i;
-
-		/* Init per tid rx state */
-		for (tidno = 0, tid = &an->an_aggr.tx.tid[tidno];
-			tidno < WME_NUM_TID;
-		     tidno++, tid++) {
-
-			for (i = 0; i < ATH_TID_MAX_BUFS; i++)
-				ASSERT(tid->tx_buf[i] == NULL);
+			spin_unlock(&txq->axq_lock);
 		}
 	}
 }
@@ -2758,6 +2522,8 @@ void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb)
 	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
@@ -2766,9 +2532,9 @@ void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb)
 	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->seq_no += 0x10;
+			sc->tx.seq_no += 0x10;
 		hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
-		hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
+		hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
 	}
 
 	/* Add the padding after the header if this is not already done */
@@ -2776,8 +2542,7 @@ void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb)
 	if (hdrlen & 3) {
 		padsize = hdrlen % 4;
 		if (skb_headroom(skb) < padsize) {
-			DPRINTF(sc, ATH_DBG_XMIT, "%s: TX CABQ padding "
-				"failed\n", __func__);
+			DPRINTF(sc, ATH_DBG_XMIT, "TX CABQ padding failed\n");
 			dev_kfree_skb_any(skb);
 			return;
 		}
@@ -2785,23 +2550,16 @@ void ath_tx_cabq(struct ath_softc *sc, struct sk_buff *skb)
 		memmove(skb->data, skb->data + padsize, hdrlen);
 	}
 
-	DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting CABQ packet, skb: %p\n",
-		__func__,
-		skb);
+	txctl.txq = sc->beacon.cabq;
 
-	memset(&txctl, 0, sizeof(struct ath_tx_control));
-	txctl.flags = ATH9K_TXDESC_CAB;
-	if (ath_tx_prepare(sc, skb, &txctl) == 0) {
-		/*
-		 * Start DMA mapping.
-		 * ath_tx_start_dma() will be called either synchronously
-		 * or asynchrounsly once DMA is complete.
-		 */
-		xmit_map_sg(sc, skb, &txctl);
-	} else {
-		ath_node_put(sc, txctl.an, ATH9K_BH_STATUS_CHANGE);
-		DPRINTF(sc, ATH_DBG_XMIT, "%s: TX CABQ failed\n", __func__);
-		dev_kfree_skb_any(skb);
+	DPRINTF(sc, ATH_DBG_XMIT, "transmitting CABQ packet, skb: %p\n", skb);
+
+	if (ath_tx_start(sc, skb, &txctl) != 0) {
+		DPRINTF(sc, ATH_DBG_XMIT, "CABQ TX failed\n");
+		goto exit;
 	}
-}
 
+	return;
+exit:
+	dev_kfree_skb_any(skb);
+}