ath9k: add a bunch of powersave handling fixes

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/kernel/mac80211/patches/339-ath9k-fix-moredata-bit-in-PS-buffered-frame-release.patch

@@ -0,0 +1,49 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sun, 28 Aug 2016 13:13:01 +0200
+Subject: [PATCH] ath9k: fix moredata bit in PS buffered frame release
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1634,6 +1634,21 @@ void ath_tx_aggr_wakeup(struct ath_softc
+ 	}
+ }
+ 
++static void
++ath9k_set_moredata(struct ath_softc *sc, struct ath_buf *bf, bool val)
++{
++	struct ieee80211_hdr *hdr;
++	u16 mask = cpu_to_le16(IEEE80211_FCTL_MOREDATA);
++	u16 mask_val = mask * val;
++
++	hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data;
++	if ((hdr->frame_control & mask) != mask_val) {
++		hdr->frame_control = (hdr->frame_control & ~mask) | mask_val;
++		dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
++			sizeof(*hdr), DMA_TO_DEVICE);
++	}
++}
++
+ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
+ 				   struct ieee80211_sta *sta,
+ 				   u16 tids, int nframes,
+@@ -1664,6 +1679,7 @@ void ath9k_release_buffered_frames(struc
+ 			if (!bf)
+ 				break;
+ 
++			ath9k_set_moredata(sc, bf, true);
+ 			list_add_tail(&bf->list, &bf_q);
+ 			ath_set_rates(tid->an->vif, tid->an->sta, bf, true);
+ 			if (bf_isampdu(bf)) {
+@@ -1687,6 +1703,9 @@ void ath9k_release_buffered_frames(struc
+ 	if (list_empty(&bf_q))
+ 		return;
+ 
++	if (!more_data)
++		ath9k_set_moredata(sc, bf_tail, false);
++
+ 	info = IEEE80211_SKB_CB(bf_tail->bf_mpdu);
+ 	info->flags |= IEEE80211_TX_STATUS_EOSP;
+ 

package/kernel/mac80211/patches/340-ath9k-clear-potentially-stale-EOSP-status-bit-in-int.patch

@@ -0,0 +1,22 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sun, 28 Aug 2016 13:13:42 +0200
+Subject: [PATCH] ath9k: clear potentially stale EOSP status bit in
+ intermediate queues
+
+Prevents spurious ieee80211_sta_eosp calls.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -945,7 +945,8 @@ ath_tx_get_tid_subframe(struct ath_softc
+ 		bf->bf_lastbf = bf;
+ 
+ 		tx_info = IEEE80211_SKB_CB(skb);
+-		tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT;
++		tx_info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
++				    IEEE80211_TX_STATUS_EOSP);
+ 
+ 		/*
+ 		 * No aggregation session is running, but there may be frames

package/kernel/mac80211/patches/341-ath9k-release-PS-buffered-frames-as-A-MPDU-if-enable.patch

@@ -0,0 +1,40 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sun, 28 Aug 2016 13:15:10 +0200
+Subject: [PATCH] ath9k: release PS buffered frames as A-MPDU if enabled
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1660,10 +1660,11 @@ void ath9k_release_buffered_frames(struc
+ 	struct ath_node *an = (struct ath_node *)sta->drv_priv;
+ 	struct ath_txq *txq = sc->tx.uapsdq;
+ 	struct ieee80211_tx_info *info;
++	struct ath_frame_info *fi;
+ 	struct list_head bf_q;
+ 	struct ath_buf *bf_tail = NULL, *bf;
+ 	int sent = 0;
+-	int i;
++	int n, i;
+ 
+ 	INIT_LIST_HEAD(&bf_q);
+ 	for (i = 0; tids && nframes; i++, tids >>= 1) {
+@@ -1683,10 +1684,15 @@ void ath9k_release_buffered_frames(struc
+ 			ath9k_set_moredata(sc, bf, true);
+ 			list_add_tail(&bf->list, &bf_q);
+ 			ath_set_rates(tid->an->vif, tid->an->sta, bf, true);
+-			if (bf_isampdu(bf)) {
++			if (bf_isampdu(bf))
+ 				ath_tx_addto_baw(sc, tid, bf);
+-				bf->bf_state.bf_type &= ~BUF_AGGR;
++			if (bf_isaggr(bf)) {
++				fi = get_frame_info(bf->bf_mpdu);
++				n = ath_compute_num_delims(sc, tid, bf,
++							   fi->framelen, true);
++				bf->bf_state.ndelim = n;
+ 			}
++
+ 			if (bf_tail)
+ 				bf_tail->bf_next = bf;
+ 

package/kernel/mac80211/patches/342-ath9k-report-tx-status-on-EOSP.patch

@@ -0,0 +1,19 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sun, 28 Aug 2016 13:23:27 +0200
+Subject: [PATCH] ath9k: report tx status on EOSP
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -86,7 +86,8 @@ static void ath_tx_status(struct ieee802
+ 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ 	struct ieee80211_sta *sta = info->status.status_driver_data[0];
+ 
+-	if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) {
++	if (info->flags & (IEEE80211_TX_CTL_REQ_TX_STATUS |
++			   IEEE80211_TX_STATUS_EOSP)) {
+ 		ieee80211_tx_status(hw, skb);
+ 		return;
+ 	}

package/kernel/mac80211/patches/343-ath9k-fix-block-ack-window-tracking-issues.patch

@@ -0,0 +1,111 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Tue, 30 Aug 2016 12:44:08 +0200
+Subject: [PATCH] ath9k: fix block-ack window tracking issues
+
+Ensure that a buffer gets tracked as part of the block-ack window as
+soon as it's dequeued from the tid for the first time. Ensure that
+double calls to ath_tx_addto_baw (e.g. on retransmission) don't cause
+any issues.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -62,7 +62,7 @@ static void ath_tx_rc_status(struct ath_
+ 			     struct ath_tx_status *ts, int nframes, int nbad,
+ 			     int txok);
+ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
+-			      int seqno);
++			      struct ath_buf *bf);
+ static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
+ 					   struct ath_txq *txq,
+ 					   struct ath_atx_tid *tid,
+@@ -300,7 +300,7 @@ static void ath_tx_flush_tid(struct ath_
+ 		}
+ 
+ 		if (fi->baw_tracked) {
+-			ath_tx_update_baw(sc, tid, bf->bf_state.seqno);
++			ath_tx_update_baw(sc, tid, bf);
+ 			sendbar = true;
+ 		}
+ 
+@@ -316,10 +316,15 @@ static void ath_tx_flush_tid(struct ath_
+ }
+ 
+ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
+-			      int seqno)
++			      struct ath_buf *bf)
+ {
++	struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu);
++	u16 seqno = bf->bf_state.seqno;
+ 	int index, cindex;
+ 
++	if (!fi->baw_tracked)
++		return;
++
+ 	index  = ATH_BA_INDEX(tid->seq_start, seqno);
+ 	cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
+ 
+@@ -340,6 +345,9 @@ static void ath_tx_addto_baw(struct ath_
+ 	u16 seqno = bf->bf_state.seqno;
+ 	int index, cindex;
+ 
++	if (fi->baw_tracked)
++		return;
++
+ 	index  = ATH_BA_INDEX(tid->seq_start, seqno);
+ 	cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
+ 	__set_bit(cindex, tid->tx_buf);
+@@ -616,7 +624,7 @@ static void ath_tx_complete_aggr(struct
+ 			 * complete the acked-ones/xretried ones; update
+ 			 * block-ack window
+ 			 */
+-			ath_tx_update_baw(sc, tid, seqno);
++			ath_tx_update_baw(sc, tid, bf);
+ 
+ 			if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) {
+ 				memcpy(tx_info->control.rates, rates, sizeof(rates));
+@@ -646,7 +654,7 @@ static void ath_tx_complete_aggr(struct
+ 				 * run out of tx buf.
+ 				 */
+ 				if (!tbf) {
+-					ath_tx_update_baw(sc, tid, seqno);
++					ath_tx_update_baw(sc, tid, bf);
+ 
+ 					ath_tx_complete_buf(sc, bf, txq,
+ 							    &bf_head, NULL, ts,
+@@ -986,11 +994,14 @@ ath_tx_get_tid_subframe(struct ath_softc
+ 
+ 			INIT_LIST_HEAD(&bf_head);
+ 			list_add(&bf->list, &bf_head);
+-			ath_tx_update_baw(sc, tid, seqno);
++			ath_tx_update_baw(sc, tid, bf);
+ 			ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0);
+ 			continue;
+ 		}
+ 
++		if (bf_isampdu(bf))
++			ath_tx_addto_baw(sc, tid, bf);
++
+ 		return bf;
+ 	}
+ 
+@@ -1048,8 +1059,6 @@ ath_tx_form_aggr(struct ath_softc *sc, s
+ 		bf->bf_next = NULL;
+ 
+ 		/* link buffers of this frame to the aggregate */
+-		if (!fi->baw_tracked)
+-			ath_tx_addto_baw(sc, tid, bf);
+ 		bf->bf_state.ndelim = ndelim;
+ 
+ 		list_add_tail(&bf->list, bf_q);
+@@ -1685,8 +1694,6 @@ void ath9k_release_buffered_frames(struc
+ 			ath9k_set_moredata(sc, bf, true);
+ 			list_add_tail(&bf->list, &bf_q);
+ 			ath_set_rates(tid->an->vif, tid->an->sta, bf, true);
+-			if (bf_isampdu(bf))
+-				ath_tx_addto_baw(sc, tid, bf);
+ 			if (bf_isaggr(bf)) {
+ 				fi = get_frame_info(bf->bf_mpdu);
+ 				n = ath_compute_num_delims(sc, tid, bf,