ath9k: fix sampling frame handling wrt. aggregation, replace minstrel_ht performance fixes for better performance

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23558 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/patches/560-ath9k_aggr_sampling_fix.patch

@@ -0,0 +1,22 @@
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -673,6 +673,7 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+ 	u16 aggr_limit = 0, al = 0, bpad = 0,
+ 		al_delta, h_baw = tid->baw_size / 2;
+ 	enum ATH_AGGR_STATUS status = ATH_AGGR_DONE;
++	struct ieee80211_tx_info *tx_info;
+ 
+ 	bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list);
+ 
+@@ -699,6 +700,11 @@ static enum ATH_AGGR_STATUS ath_tx_form_
+ 			break;
+ 		}
+ 
++		tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
++		if (nframes && ((tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ||
++			!(tx_info->control.rates[0].flags & IEEE80211_TX_RC_MCS)))
++			break;
++
+ 		/* do not exceed subframe limit */
+ 		if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) {
+ 			status = ATH_AGGR_LIMITED;

package/mac80211/patches/560-minstrel_ht_performance.patch

@@ -1,32 +0,0 @@
---- a/net/mac80211/rc80211_minstrel_ht.h
-+++ b/net/mac80211/rc80211_minstrel_ht.h
-@@ -103,6 +103,7 @@ struct minstrel_ht_sta {
- 	u8 sample_tries;
- 	u8 sample_count;
- 	u8 sample_slow;
-+	u8 sample_retry;
- 
- 	/* current MCS group to be sampled */
- 	u8 sample_group;
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -261,6 +261,7 @@ minstrel_ht_update_stats(struct minstrel
- 
- 	/* try to sample up to half of the availble rates during each interval */
- 	mi->sample_count *= 4;
-+	mi->sample_retry = mi->sample_count;
- 
- 	cur_prob = 0;
- 	cur_prob_tp = 0;
-@@ -572,6 +573,11 @@ minstrel_get_sample_rate(struct minstrel
- 	return sample_idx;
- 
- next:
-+	if (mi->sample_retry > 0) {
-+		mi->sample_retry--;
-+		mi->sample_tries++;
-+		mi->sample_wait = 1;
-+	}
- 	minstrel_next_sample_idx(mi);
- 	return -1;
- }

package/mac80211/patches/561-minstrel_ht_sampling_interval.patch

@@ -1,11 +0,0 @@
---- a/net/mac80211/rc80211_minstrel_ht.c
-+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -408,7 +408,7 @@ minstrel_ht_tx_status(void *priv, struct
- 	mi->ampdu_len += info->status.ampdu_len;
- 
- 	if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
--		mi->sample_wait = 4 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
-+		mi->sample_wait = 8 + MINSTREL_TRUNC(mi->avg_ampdu_len);
- 		mi->sample_tries = 3;
- 		mi->sample_count--;
- 	}

package/mac80211/patches/561-minstrel_sample_retransmit.patch

@@ -0,0 +1,13 @@
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -506,7 +506,9 @@ minstrel_ht_set_rate(struct minstrel_pri
+ 	if (!mr->retry_updated)
+ 		minstrel_calc_retransmit(mp, mi, index);
+ 
+-	if (mr->probability < MINSTREL_FRAC(20, 100))
++	if (sample)
++		rate->count = 1;
++	else if (mr->probability < MINSTREL_FRAC(20, 100))
+ 		rate->count = 2;
+ 	else if (rtscts)
+ 		rate->count = mr->retry_count_rtscts;

package/mac80211/patches/562-minstrel_sample_performance.patch

@@ -0,0 +1,52 @@
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -407,8 +407,8 @@ minstrel_ht_tx_status(void *priv, struct
+ 	mi->ampdu_len += info->status.ampdu_len;
+ 
+ 	if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
+-		mi->sample_wait = 4 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
+-		mi->sample_tries = 3;
++		mi->sample_wait = 16 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
++		mi->sample_tries = 2;
+ 		mi->sample_count--;
+ 	}
+ 
+@@ -564,7 +564,7 @@ minstrel_get_sample_rate(struct minstrel
+ 	 */
+ 	if (minstrel_get_duration(sample_idx) >
+ 	    minstrel_get_duration(mi->max_tp_rate)) {
+-		if (mr->sample_skipped < 10)
++		if (mr->sample_skipped < 20)
+ 			goto next;
+ 
+ 		if (mi->sample_slow++ > 2)
+@@ -588,6 +588,7 @@ minstrel_ht_get_rate(void *priv, struct 
+ 	struct minstrel_ht_sta *mi = &msp->ht;
+ 	struct minstrel_priv *mp = priv;
+ 	int sample_idx;
++	bool sample = false;
+ 
+ 	if (rate_control_send_low(sta, priv_sta, txrc))
+ 		return;
+@@ -598,10 +599,11 @@ minstrel_ht_get_rate(void *priv, struct 
+ 	info->flags |= mi->tx_flags;
+ 	sample_idx = minstrel_get_sample_rate(mp, mi);
+ 	if (sample_idx >= 0) {
++		sample = true;
+ 		minstrel_ht_set_rate(mp, mi, &ar[0], sample_idx,
+ 			txrc, true, false);
+ 		minstrel_ht_set_rate(mp, mi, &ar[1], mi->max_tp_rate,
+-			txrc, false, true);
++			txrc, false, false);
+ 		info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+ 	} else {
+ 		minstrel_ht_set_rate(mp, mi, &ar[0], mi->max_tp_rate,
+@@ -609,7 +611,7 @@ minstrel_ht_get_rate(void *priv, struct 
+ 		minstrel_ht_set_rate(mp, mi, &ar[1], mi->max_tp_rate2,
+ 			txrc, false, true);
+ 	}
+-	minstrel_ht_set_rate(mp, mi, &ar[2], mi->max_prob_rate, txrc, false, true);
++	minstrel_ht_set_rate(mp, mi, &ar[2], mi->max_prob_rate, txrc, false, !sample);
+ 
+ 	ar[3].count = 0;
+ 	ar[3].idx = -1;