1 files changed, 362 insertions, 205 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
index d064622..b608e1c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
@@ -1,6 +1,6 @@
 /******************************************************************************
  *
- * Copyright(c) 2005 - 2007 Intel Corporation. All rights reserved.
+ * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
@@ -36,9 +36,10 @@
 
 #include <linux/workqueue.h>
 
-#include "../net/mac80211/ieee80211_rate.h"
+#include "../net/mac80211/rate.h"
 
 #include "iwl-4965.h"
+#include "iwl-core.h"
 #include "iwl-helpers.h"
 
 #define RS_NAME "iwl-4965-rs"
@@ -83,7 +84,7 @@ struct iwl4965_rate_scale_data {
 /**
  * struct iwl4965_scale_tbl_info -- tx params and success history for all rates
  *
- * There are two of these in struct iwl_rate_scale_priv,
+ * There are two of these in struct iwl4965_lq_sta,
  * one for "active", and one for "search".
  */
 struct iwl4965_scale_tbl_info {
@@ -98,8 +99,23 @@ struct iwl4965_scale_tbl_info {
 	struct iwl4965_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
 };
 
+#ifdef CONFIG_IWL4965_HT
+
+struct iwl4965_traffic_load {
+	unsigned long time_stamp;	/* age of the oldest statistics */
+	u32 packet_count[TID_QUEUE_MAX_SIZE];   /* packet count in this time
+						 * slice */
+	u32 total;			/* total num of packets during the
+					 * last TID_MAX_TIME_DIFF */
+	u8 queue_count;			/* number of queues that has
+					 * been used since the last cleanup */
+	u8 head;			/* start of the circular buffer */
+};
+
+#endif /* CONFIG_IWL4965_HT */
+
 /**
- * struct iwl_rate_scale_priv -- driver's rate scaling private structure
+ * struct iwl4965_lq_sta -- driver's rate scaling private structure
  *
  * Pointer to this gets passed back and forth between driver and mac80211.
  */
@@ -124,7 +140,7 @@ struct iwl4965_lq_sta {
 	u8 valid_antenna;
 	u8 is_green;
 	u8 is_dup;
-	u8 phymode;
+	enum ieee80211_band band;
 	u8 ibss_sta_added;
 
 	/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
@@ -134,23 +150,30 @@ struct iwl4965_lq_sta {
 	u16 active_mimo_rate;
 	u16 active_rate_basic;
 
-	struct iwl4965_link_quality_cmd lq;
+	struct iwl_link_quality_cmd lq;
 	struct iwl4965_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
+#ifdef CONFIG_IWL4965_HT
+	struct iwl4965_traffic_load load[TID_MAX_LOAD_COUNT];
+	u8 tx_agg_tid_en;
+#endif
 #ifdef CONFIG_MAC80211_DEBUGFS
 	struct dentry *rs_sta_dbgfs_scale_table_file;
 	struct dentry *rs_sta_dbgfs_stats_table_file;
+#ifdef CONFIG_IWL4965_HT
+	struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
+#endif
 	struct iwl4965_rate dbg_fixed;
-	struct iwl4965_priv *drv;
+	struct iwl_priv *drv;
 #endif
 };
 
-static void rs_rate_scale_perform(struct iwl4965_priv *priv,
+static void rs_rate_scale_perform(struct iwl_priv *priv,
 				   struct net_device *dev,
 				   struct ieee80211_hdr *hdr,
 				   struct sta_info *sta);
 static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta,
 			     struct iwl4965_rate *tx_mcs,
-			     struct iwl4965_link_quality_cmd *tbl);
+			     struct iwl_link_quality_cmd *tbl);
 
 
 #ifdef CONFIG_MAC80211_DEBUGFS
@@ -207,68 +230,150 @@ static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = {
 	0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293
 };
 
-static int iwl4965_lq_sync_callback(struct iwl4965_priv *priv,
-				struct iwl4965_cmd *cmd, struct sk_buff *skb)
+static inline u8 iwl4965_rate_get_rate(u32 rate_n_flags)
 {
-	/*We didn't cache the SKB; let the caller free it */
-	return 1;
+	return (u8)(rate_n_flags & 0xFF);
 }
 
-static inline u8 iwl4965_rate_get_rate(u32 rate_n_flags)
+static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window)
 {
-	return (u8)(rate_n_flags & 0xFF);
+	window->data = 0;
+	window->success_counter = 0;
+	window->success_ratio = IWL_INVALID_VALUE;
+	window->counter = 0;
+	window->average_tpt = IWL_INVALID_VALUE;
+	window->stamp = 0;
 }
 
-static int rs_send_lq_cmd(struct iwl4965_priv *priv,
-			  struct iwl4965_link_quality_cmd *lq, u8 flags)
+#ifdef CONFIG_IWL4965_HT
+/*
+ *	removes the old data from the statistics. All data that is older than
+ *	TID_MAX_TIME_DIFF, will be deleted.
+ */
+static void rs_tl_rm_old_stats(struct iwl4965_traffic_load *tl, u32 curr_time)
 {
-#ifdef CONFIG_IWL4965_DEBUG
-	int i;
-#endif
-	struct iwl4965_host_cmd cmd = {
-		.id = REPLY_TX_LINK_QUALITY_CMD,
-		.len = sizeof(struct iwl4965_link_quality_cmd),
-		.meta.flags = flags,
-		.data = lq,
-	};
-
-	if ((lq->sta_id == 0xFF) &&
-	    (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
-		return -EINVAL;
+	/* The oldest age we want to keep */
+	u32 oldest_time = curr_time - TID_MAX_TIME_DIFF;
+
+	while (tl->queue_count &&
+	       (tl->time_stamp < oldest_time)) {
+		tl->total -= tl->packet_count[tl->head];
+		tl->packet_count[tl->head] = 0;
+		tl->time_stamp += TID_QUEUE_CELL_SPACING;
+		tl->queue_count--;
+		tl->head++;
+		if (tl->head >= TID_QUEUE_MAX_SIZE)
+			tl->head = 0;
+	}
+}
+
+/*
+ *	increment traffic load value for tid and also remove
+ *	any old values if passed the certain time period
+ */
+static void rs_tl_add_packet(struct iwl4965_lq_sta *lq_data, u8 tid)
+{
+	u32 curr_time = jiffies_to_msecs(jiffies);
+	u32 time_diff;
+	s32 index;
+	struct iwl4965_traffic_load *tl = NULL;
 
-	if (lq->sta_id == 0xFF)
-		lq->sta_id = IWL_AP_ID;
+	if (tid >= TID_MAX_LOAD_COUNT)
+		return;
 
-	IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
-	IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
-		       lq->general_params.single_stream_ant_msk,
-		       lq->general_params.dual_stream_ant_msk);
-#ifdef CONFIG_IWL4965_DEBUG
-	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
-		IWL_DEBUG_RATE("lq index %d 0x%X\n",
-				i, lq->rs_table[i].rate_n_flags);
-#endif
+	tl = &lq_data->load[tid];
 
-	if (flags & CMD_ASYNC)
-		cmd.meta.u.callback = iwl4965_lq_sync_callback;
+	curr_time -= curr_time % TID_ROUND_VALUE;
 
-	if (iwl4965_is_associated(priv) && priv->assoc_station_added &&
-	    priv->lq_mngr.lq_ready)
-		return  iwl4965_send_cmd(priv, &cmd);
+	/* Happens only for the first packet. Initialize the data */
+	if (!(tl->queue_count)) {
+		tl->total = 1;
+		tl->time_stamp = curr_time;
+		tl->queue_count = 1;
+		tl->head = 0;
+		tl->packet_count[0] = 1;
+		return;
+	}
 
-	return 0;
+	time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
+	index = time_diff / TID_QUEUE_CELL_SPACING;
+
+	/* The history is too long: remove data that is older than */
+	/* TID_MAX_TIME_DIFF */
+	if (index >= TID_QUEUE_MAX_SIZE)
+		rs_tl_rm_old_stats(tl, curr_time);
+
+	index = (tl->head + index) % TID_QUEUE_MAX_SIZE;
+	tl->packet_count[index] = tl->packet_count[index] + 1;
+	tl->total = tl->total + 1;
+
+	if ((index + 1) > tl->queue_count)
+		tl->queue_count = index + 1;
 }
 
-static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window)
+/*
+	get the traffic load value for tid
+*/
+static u32 rs_tl_get_load(struct iwl4965_lq_sta *lq_data, u8 tid)
 {
-	window->data = 0;
-	window->success_counter = 0;
-	window->success_ratio = IWL_INVALID_VALUE;
-	window->counter = 0;
-	window->average_tpt = IWL_INVALID_VALUE;
-	window->stamp = 0;
+	u32 curr_time = jiffies_to_msecs(jiffies);
+	u32 time_diff;
+	s32 index;
+	struct iwl4965_traffic_load *tl = NULL;
+
+	if (tid >= TID_MAX_LOAD_COUNT)
+		return 0;
+
+	tl = &(lq_data->load[tid]);
+
+	curr_time -= curr_time % TID_ROUND_VALUE;
+
+	if (!(tl->queue_count))
+		return 0;
+
+	time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
+	index = time_diff / TID_QUEUE_CELL_SPACING;
+
+	/* The history is too long: remove data that is older than */
+	/* TID_MAX_TIME_DIFF */
+	if (index >= TID_QUEUE_MAX_SIZE)
+		rs_tl_rm_old_stats(tl, curr_time);
+
+	return tl->total;
+}
+
+static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv,
+				struct iwl4965_lq_sta *lq_data, u8 tid,
+				struct sta_info *sta)
+{
+	unsigned long state;
+	DECLARE_MAC_BUF(mac);
+
+	spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
+	state = sta->ampdu_mlme.tid_state_tx[tid];
+	spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
+
+	if (state == HT_AGG_STATE_IDLE &&
+	    rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) {
+		IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n",
+				print_mac(mac, sta->addr), tid);
+		ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid);
+	}
+}
+
+static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid,
+				struct iwl4965_lq_sta *lq_data,
+				struct sta_info *sta)
+{
+	if ((tid < TID_MAX_LOAD_COUNT))
+		rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta);
+	else if (tid == IWL_AGG_ALL_TID)
+		for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++)
+			rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta);
 }
 
+#endif /* CONFIG_IWLWIFI_HT */
+
 /**
  * rs_collect_tx_data - Update the success/failure sliding window
  *
@@ -277,7 +382,8 @@ static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window)
  * packets.
  */
 static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows,
-			      int scale_index, s32 tpt, u32 status)
+			      int scale_index, s32 tpt, int retries,
+			      int successes)
 {
 	struct iwl4965_rate_scale_data *window = NULL;
 	u64 mask;
@@ -298,26 +404,33 @@ static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows,
 	 * subtract "1" from the success counter (this is the main reason
 	 * we keep these bitmaps!).
 	 */
-	if (window->counter >= win_size) {
-		window->counter = win_size - 1;
-		mask = 1;
-		mask = (mask << (win_size - 1));
-		if ((window->data & mask)) {
-			window->data &= ~mask;
-			window->success_counter = window->success_counter - 1;
+	while (retries > 0) {
+		if (window->counter >= win_size) {
+			window->counter = win_size - 1;
+			mask = 1;
+			mask = (mask << (win_size - 1));
+			if (window->data & mask) {
+				window->data &= ~mask;
+				window->success_counter =
+					window->success_counter - 1;
+			}
 		}
-	}
 
-	/* Increment frames-attempted counter */
-	window->counter = window->counter + 1;
+		/* Increment frames-attempted counter */
+		window->counter++;
+
+		/* Shift bitmap by one frame (throw away oldest history),
+		 * OR in "1", and increment "success" if this
+		 * frame was successful. */
+		mask = window->data;
+		window->data = (mask << 1);
+		if (successes > 0) {
+			window->success_counter = window->success_counter + 1;
+			window->data |= 0x1;
+			successes--;
+		}
 
-	/* Shift bitmap by one frame (throw away oldest history),
-	 * OR in "1", and increment "success" if this frame was successful. */
-	mask = window->data;
-	window->data = (mask << 1);
-	if (status != 0) {
-		window->success_counter = window->success_counter + 1;
-		window->data |= 0x1;
+		retries--;
 	}
 
 	/* Calculate current success ratio, avoid divide-by-0! */
@@ -404,13 +517,14 @@ static void rs_mcs_from_tbl(struct iwl4965_rate *mcs_rate,
  * fill "search" or "active" tx mode table.
  */
 static int rs_get_tbl_info_from_mcs(const struct iwl4965_rate *mcs_rate,
-				    int phymode, struct iwl4965_scale_tbl_info *tbl,
+				    enum ieee80211_band band,
+				    struct iwl4965_scale_tbl_info *tbl,
 				    int *rate_idx)
 {
 	int index;
 	u32 ant_msk;
 
-	index = iwl4965_rate_index_from_plcp(mcs_rate->rate_n_flags);
+	index = iwl4965_hwrate_to_plcp_idx(mcs_rate->rate_n_flags);
 
 	if (index  == IWL_RATE_INVALID) {
 		*rate_idx = -1;
@@ -429,7 +543,7 @@ static int rs_get_tbl_info_from_mcs(const struct iwl4965_rate *mcs_rate,
 			tbl->lq_type = LQ_NONE;
 		else {
 
-			if (phymode == MODE_IEEE80211A)
+			if (band == IEEE80211_BAND_5GHZ)
 				tbl->lq_type = LQ_A;
 			else
 				tbl->lq_type = LQ_G;
@@ -498,7 +612,7 @@ static inline void rs_toggle_antenna(struct iwl4965_rate *new_rate,
 	}
 }
 
-static inline u8 rs_use_green(struct iwl4965_priv *priv,
+static inline u8 rs_use_green(struct iwl_priv *priv,
 			      struct ieee80211_conf *conf)
 {
 #ifdef CONFIG_IWL4965_HT
@@ -607,7 +721,7 @@ static void rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta,
 	if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) {
 		switch_to_legacy = 1;
 		scale_index = rs_ht_to_legacy[scale_index];
-		if (lq_sta->phymode == MODE_IEEE80211A)
+		if (lq_sta->band == IEEE80211_BAND_5GHZ)
 			tbl->lq_type = LQ_A;
 		else
 			tbl->lq_type = LQ_G;
@@ -625,7 +739,7 @@ static void rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta,
 	/* Mask with station rate restriction */
 	if (is_legacy(tbl->lq_type)) {
 		/* supp_rates has no CCK bits in A mode */
-		if (lq_sta->phymode == (u8) MODE_IEEE80211A)
+		if (lq_sta->band == IEEE80211_BAND_5GHZ)
 			rate_mask  = (u16)(rate_mask &
 			   (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
 		else
@@ -658,11 +772,12 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 	u8 retries;
 	int rs_index, index = 0;
 	struct iwl4965_lq_sta *lq_sta;
-	struct iwl4965_link_quality_cmd *table;
+	struct iwl_link_quality_cmd *table;
 	struct sta_info *sta;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-	struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate;
+	struct iwl_priv *priv = (struct iwl_priv *)priv_rate;
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_hw *hw = local_to_hw(local);
 	struct iwl4965_rate_scale_data *window = NULL;
 	struct iwl4965_rate_scale_data *search_win = NULL;
 	struct iwl4965_rate tx_mcs;
@@ -677,28 +792,32 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 	if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1))
 		return;
 
+	/* This packet was aggregated but doesn't carry rate scale info */
+	if ((tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) &&
+	    !(tx_resp->flags & IEEE80211_TX_STATUS_AMPDU))
+		return;
+
 	retries = tx_resp->retry_count;
 
 	if (retries > 15)
 		retries = 15;
 
+	rcu_read_lock();
 
 	sta = sta_info_get(local, hdr->addr1);
 
-	if (!sta || !sta->rate_ctrl_priv) {
-		if (sta)
-			sta_info_put(sta);
-		return;
-	}
+	if (!sta || !sta->rate_ctrl_priv)
+		goto out;
+
 
 	lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv;
 
 	if (!priv->lq_mngr.lq_ready)
-		return;
+		goto out;
 
 	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 	    !lq_sta->ibss_sta_added)
-		return;
+		goto out;
 
 	table = &lq_sta->lq;
 	active_index = lq_sta->active_tbl;
@@ -719,17 +838,6 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 	search_win = (struct iwl4965_rate_scale_data *)
 	    &(search_tbl->win[0]);
 
-	tx_mcs.rate_n_flags = tx_resp->control.tx_rate;
-
-	rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode,
-				  &tbl_type, &rs_index);
-	if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) {
-		IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n",
-			     rs_index, tx_mcs.rate_n_flags);
-		sta_info_put(sta);
-		return;
-	}
-
 	/*
 	 * Ignore this Tx frame response if its initial rate doesn't match
 	 * that of latest Link Quality command.  There may be stragglers
@@ -738,14 +846,29 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 	 * to check "search" mode, or a prior "search" mode after we've moved
 	 * to a new "search" mode (which might become the new "active" mode).
 	 */
-	if (retries &&
-	    (tx_mcs.rate_n_flags !=
-				le32_to_cpu(table->rs_table[0].rate_n_flags))) {
-		IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n",
-				tx_mcs.rate_n_flags,
-				le32_to_cpu(table->rs_table[0].rate_n_flags));
-		sta_info_put(sta);
-		return;
+	tx_mcs.rate_n_flags = le32_to_cpu(table->rs_table[0].rate_n_flags);
+	rs_get_tbl_info_from_mcs(&tx_mcs, priv->band, &tbl_type, &rs_index);
+	if (priv->band == IEEE80211_BAND_5GHZ)
+		rs_index -= IWL_FIRST_OFDM_RATE;
+
+	if ((tx_resp->control.tx_rate == NULL) ||
+	    (tbl_type.is_SGI ^
+		!!(tx_resp->control.flags & IEEE80211_TXCTL_SHORT_GI)) ||
+	    (tbl_type.is_fat ^
+		!!(tx_resp->control.flags & IEEE80211_TXCTL_40_MHZ_WIDTH)) ||
+	    (tbl_type.is_dup ^
+		!!(tx_resp->control.flags & IEEE80211_TXCTL_DUP_DATA)) ||
+	    (tbl_type.antenna_type ^
+		tx_resp->control.antenna_sel_tx) ||
+	    (!!(tx_mcs.rate_n_flags & RATE_MCS_HT_MSK) ^
+		!!(tx_resp->control.flags & IEEE80211_TXCTL_OFDM_HT)) ||
+	    (!!(tx_mcs.rate_n_flags & RATE_MCS_GF_MSK) ^
+		!!(tx_resp->control.flags & IEEE80211_TXCTL_GREEN_FIELD)) ||
+	    (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate !=
+		tx_resp->control.tx_rate->bitrate)) {
+		IWL_DEBUG_RATE("initial rate does not match 0x%x\n",
+				tx_mcs.rate_n_flags);
+		goto out;
 	}
 
 	/* Update frame history window with "failure" for each Tx retry. */
@@ -754,7 +877,7 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 		 * Each tx attempt steps one entry deeper in the rate table. */
 		tx_mcs.rate_n_flags =
 		    le32_to_cpu(table->rs_table[index].rate_n_flags);
-		rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode,
+		rs_get_tbl_info_from_mcs(&tx_mcs, priv->band,
 					  &tbl_type, &rs_index);
 
 		/* If type matches "search" table,
@@ -766,7 +889,7 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 				tpt = search_tbl->expected_tpt[rs_index];
 			else
 				tpt = 0;
-			rs_collect_tx_data(search_win, rs_index, tpt, 0);
+			rs_collect_tx_data(search_win, rs_index, tpt, 1, 0);
 
 		/* Else if type matches "current/active" table,
 		 * add failure to "current/active" history */
@@ -777,7 +900,7 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 				tpt = curr_tbl->expected_tpt[rs_index];
 			else
 				tpt = 0;
-			rs_collect_tx_data(window, rs_index, tpt, 0);
+			rs_collect_tx_data(window, rs_index, tpt, 1, 0);
 		}
 
 		/* If not searching for a new mode, increment failed counter
@@ -794,14 +917,8 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 	 * if Tx was successful first try, use original rate,
 	 * else look up the rate that was, finally, successful.
 	 */
-	if (!tx_resp->retry_count)
-		tx_mcs.rate_n_flags = tx_resp->control.tx_rate;
-	else
-		tx_mcs.rate_n_flags =
-			le32_to_cpu(table->rs_table[index].rate_n_flags);
-
-	rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode,
-				  &tbl_type, &rs_index);
+	tx_mcs.rate_n_flags = le32_to_cpu(table->rs_table[index].rate_n_flags);
+	rs_get_tbl_info_from_mcs(&tx_mcs, priv->band, &tbl_type, &rs_index);
 
 	/* Update frame history window with "success" if Tx got ACKed ... */
 	if (tx_resp->flags & IEEE80211_TX_STATUS_ACK)
@@ -818,9 +935,13 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 			tpt = search_tbl->expected_tpt[rs_index];
 		else
 			tpt = 0;
-		rs_collect_tx_data(search_win,
-				    rs_index, tpt, status);
-
+		if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU)
+			rs_collect_tx_data(search_win, rs_index, tpt,
+					   tx_resp->ampdu_ack_len,
+					   tx_resp->ampdu_ack_map);
+		else
+			rs_collect_tx_data(search_win, rs_index, tpt,
+					   1, status);
 	/* Else if type matches "current/active" table,
 	 * add final tx status to "current/active" history */
 	} else if ((tbl_type.lq_type == curr_tbl->lq_type) &&
@@ -830,21 +951,34 @@ static void rs_tx_status(void *priv_rate, struct net_device *dev,
 			tpt = curr_tbl->expected_tpt[rs_index];
 		else
 			tpt = 0;
-		rs_collect_tx_data(window, rs_index, tpt, status);
+		if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU)
+			rs_collect_tx_data(window, rs_index, tpt,
+					   tx_resp->ampdu_ack_len,
+					   tx_resp->ampdu_ack_map);
+		else
+			rs_collect_tx_data(window, rs_index, tpt,
+					   1, status);
 	}
 
 	/* If not searching for new mode, increment success/failed counter
 	 * ... these help determine when to start searching again */
 	if (lq_sta->stay_in_tbl) {
-		if (status)
-			lq_sta->total_success++;
-		else
-			lq_sta->total_failed++;
+		if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) {
+			lq_sta->total_success += tx_resp->ampdu_ack_map;
+			lq_sta->total_failed +=
+			     (tx_resp->ampdu_ack_len - tx_resp->ampdu_ack_map);
+		} else {
+			if (status)
+				lq_sta->total_success++;
+			else
+				lq_sta->total_failed++;
+		}
 	}
 
 	/* See if there's a better rate or modulation mode to try. */
 	rs_rate_scale_perform(priv, dev, hdr, sta);
-	sta_info_put(sta);
+out:
+	rcu_read_unlock();
 	return;
 }
 
@@ -948,7 +1082,7 @@ static void rs_get_expected_tpt_table(struct iwl4965_lq_sta *lq_sta,
  * to decrease to match "active" throughput.  When moving from MIMO to SISO,
  * bit rate will typically need to increase, but not if performance was bad.
  */
-static s32 rs_get_best_rate(struct iwl4965_priv *priv,
+static s32 rs_get_best_rate(struct iwl_priv *priv,
 			    struct iwl4965_lq_sta *lq_sta,
 			    struct iwl4965_scale_tbl_info *tbl,	/* "search" */
 			    u16 rate_mask, s8 index, s8 rate)
@@ -1046,7 +1180,7 @@ static inline u8 rs_is_both_ant_supp(u8 valid_antenna)
 /*
  * Set up search table for MIMO
  */
-static int rs_switch_to_mimo(struct iwl4965_priv *priv,
+static int rs_switch_to_mimo(struct iwl_priv *priv,
 			     struct iwl4965_lq_sta *lq_sta,
 			     struct ieee80211_conf *conf,
 			     struct sta_info *sta,
@@ -1105,13 +1239,13 @@ static int rs_switch_to_mimo(struct iwl4965_priv *priv,
 	return 0;
 #else
 	return -1;
-#endif				/*CONFIG_IWL4965_HT */
+#endif	/*CONFIG_IWL4965_HT */
 }
 
 /*
  * Set up search table for SISO
  */
-static int rs_switch_to_siso(struct iwl4965_priv *priv,
+static int rs_switch_to_siso(struct iwl_priv *priv,
 			     struct iwl4965_lq_sta *lq_sta,
 			     struct ieee80211_conf *conf,
 			     struct sta_info *sta,
@@ -1168,13 +1302,13 @@ static int rs_switch_to_siso(struct iwl4965_priv *priv,
 #else
 	return -1;
 
-#endif				/*CONFIG_IWL4965_HT */
+#endif	/*CONFIG_IWL4965_HT */
 }
 
 /*
  * Try to switch to new modulation mode from legacy
  */
-static int rs_move_legacy_other(struct iwl4965_priv *priv,
+static int rs_move_legacy_other(struct iwl_priv *priv,
 				struct iwl4965_lq_sta *lq_sta,
 				struct ieee80211_conf *conf,
 				struct sta_info *sta,
@@ -1272,7 +1406,7 @@ static int rs_move_legacy_other(struct iwl4965_priv *priv,
 /*
  * Try to switch to new modulation mode from SISO
  */
-static int rs_move_siso_to_other(struct iwl4965_priv *priv,
+static int rs_move_siso_to_other(struct iwl_priv *priv,
 				 struct iwl4965_lq_sta *lq_sta,
 				 struct ieee80211_conf *conf,
 				 struct sta_info *sta,
@@ -1325,6 +1459,7 @@ static int rs_move_siso_to_other(struct iwl4965_priv *priv,
 			break;
 		case IWL_SISO_SWITCH_GI:
 			IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n");
+
 			memcpy(search_tbl, tbl, sz);
 			search_tbl->action = 0;
 			if (search_tbl->is_SGI)
@@ -1367,7 +1502,7 @@ static int rs_move_siso_to_other(struct iwl4965_priv *priv,
 /*
  * Try to switch to new modulation mode from MIMO
  */
-static int rs_move_mimo_to_other(struct iwl4965_priv *priv,
+static int rs_move_mimo_to_other(struct iwl_priv *priv,
 				 struct iwl4965_lq_sta *lq_sta,
 				 struct ieee80211_conf *conf,
 				 struct sta_info *sta,
@@ -1390,6 +1525,7 @@ static int rs_move_mimo_to_other(struct iwl4965_priv *priv,
 		case IWL_MIMO_SWITCH_ANTENNA_B:
 			IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n");
 
+
 			/* Set up new search table for SISO */
 			memcpy(search_tbl, tbl, sz);
 			search_tbl->lq_type = LQ_SISO;
@@ -1546,7 +1682,7 @@ static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta)
 /*
  * Do rate scaling and search for new modulation mode.
  */
-static void rs_rate_scale_perform(struct iwl4965_priv *priv,
+static void rs_rate_scale_perform(struct iwl_priv *priv,
 				  struct net_device *dev,
 				  struct ieee80211_hdr *hdr,
 				  struct sta_info *sta)
@@ -1574,6 +1710,10 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 	u8 active_tbl = 0;
 	u8 done_search = 0;
 	u16 high_low;
+#ifdef CONFIG_IWL4965_HT
+	u8 tid = MAX_TID_COUNT;
+	__le16 *qc;
+#endif
 
 	IWL_DEBUG_RATE("rate scale calculate new rate for skb\n");
 
@@ -1594,6 +1734,13 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 	}
 	lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv;
 
+#ifdef CONFIG_IWL4965_HT
+	qc = ieee80211_get_qos_ctrl(hdr);
+	if (qc) {
+		tid = (u8)(le16_to_cpu(*qc) & 0xf);
+		rs_tl_add_packet(lq_sta, tid);
+	}
+#endif
 	/*
 	 * Select rate-scale / modulation-mode table to work with in
 	 * the rest of this function:  "search" if searching for better
@@ -1608,7 +1755,7 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 	is_green = lq_sta->is_green;
 
 	/* current tx rate */
-	index = sta->last_txrate;
+	index = sta->last_txrate_idx;
 
 	IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index,
 		       tbl->lq_type);
@@ -1621,7 +1768,7 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 
 	/* mask with station rate restriction */
 	if (is_legacy(tbl->lq_type)) {
-		if (lq_sta->phymode == (u8) MODE_IEEE80211A)
+		if (lq_sta->band == IEEE80211_BAND_5GHZ)
 			/* supp_rates has no CCK bits in A mode */
 			rate_scale_index_msk = (u16) (rate_mask &
 				(lq_sta->supp_rates << IWL_FIRST_OFDM_RATE));
@@ -1685,7 +1832,7 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 		if (update_lq) {
 			rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green);
 			rs_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq);
-			rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
+			iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
 		}
 		goto out;
 
@@ -1727,7 +1874,7 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 			tbl = &(lq_sta->lq_info[active_tbl]);
 
 			/* Revert to "active" rate and throughput info */
-			index = iwl4965_rate_index_from_plcp(
+			index = iwl4965_hwrate_to_plcp_idx(
 				tbl->current_rate.rate_n_flags);
 			current_tpt = lq_sta->last_tpt;
 
@@ -1850,7 +1997,7 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 	if (update_lq) {
 		rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green);
 		rs_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq);
-		rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
+		iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
 	}
 
 	/* Should we stay with this modulation mode, or search for a new one? */
@@ -1883,14 +2030,14 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 				rs_rate_scale_clear_window(&(tbl->win[i]));
 
 			/* Use new "search" start rate */
-			index = iwl4965_rate_index_from_plcp(
+			index = iwl4965_hwrate_to_plcp_idx(
 					tbl->current_rate.rate_n_flags);
 
 			IWL_DEBUG_HT("Switch current  mcs: %X index: %d\n",
 				     tbl->current_rate.rate_n_flags, index);
 			rs_fill_link_cmd(lq_sta, &tbl->current_rate,
 					 &lq_sta->lq);
-			rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
+			iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
 		}
 
 		/* If the "active" (non-search) mode was legacy,
@@ -1914,15 +2061,14 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 		 * mode for a while before next round of mode comparisons. */
 		if (lq_sta->enable_counter &&
 		    (lq_sta->action_counter >= IWL_ACTION_LIMIT)) {
-#ifdef CONFIG_IWL4965_HT_AGG
-			/* If appropriate, set up aggregation! */
-			if ((lq_sta->last_tpt > TID_AGG_TPT_THREHOLD) &&
-			    (priv->lq_mngr.agg_ctrl.auto_agg)) {
-				priv->lq_mngr.agg_ctrl.tid_retry =
-				    TID_ALL_SPECIFIED;
-				schedule_work(&priv->agg_work);
+#ifdef CONFIG_IWL4965_HT
+			if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
+			    (lq_sta->tx_agg_tid_en & (1 << tid)) &&
+			    (tid != MAX_TID_COUNT)) {
+				IWL_DEBUG_HT("try to aggregate tid %d\n", tid);
+				rs_tl_turn_on_agg(priv, tid, lq_sta, sta);
 			}
-#endif /*CONFIG_IWL4965_HT_AGG */
+#endif /*CONFIG_IWL4965_HT */
 			lq_sta->action_counter = 0;
 			rs_set_stay_in_table(0, lq_sta);
 		}
@@ -1942,21 +2088,21 @@ static void rs_rate_scale_perform(struct iwl4965_priv *priv,
 out:
 	rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green);
 	i = index;
-	sta->last_txrate = i;
+	sta->last_txrate_idx = i;
 
-	/* sta->txrate is an index to A mode rates which start
+	/* sta->txrate_idx is an index to A mode rates which start
 	 * at IWL_FIRST_OFDM_RATE
 	 */
-	if (lq_sta->phymode == (u8) MODE_IEEE80211A)
-		sta->txrate = i - IWL_FIRST_OFDM_RATE;
+	if (lq_sta->band == IEEE80211_BAND_5GHZ)
+		sta->txrate_idx = i - IWL_FIRST_OFDM_RATE;
 	else
-		sta->txrate = i;
+		sta->txrate_idx = i;
 
 	return;
 }
 
 
-static void rs_initialize_lq(struct iwl4965_priv *priv,
+static void rs_initialize_lq(struct iwl_priv *priv,
 			     struct ieee80211_conf *conf,
 			     struct sta_info *sta)
 {
@@ -1972,7 +2118,7 @@ static void rs_initialize_lq(struct iwl4965_priv *priv,
 		goto out;
 
 	lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv;
-	i = sta->last_txrate;
+	i = sta->last_txrate_idx;
 
 	if ((lq_sta->lq.sta_id == 0xff) &&
 	    (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
@@ -1996,7 +2142,7 @@ static void rs_initialize_lq(struct iwl4965_priv *priv,
 		mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK;
 
 	tbl->antenna_type = ANT_AUX;
-	rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx);
+	rs_get_tbl_info_from_mcs(&mcs_rate, priv->band, tbl, &rate_idx);
 	if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type))
 	    rs_toggle_antenna(&mcs_rate, tbl);
 
@@ -2004,13 +2150,14 @@ static void rs_initialize_lq(struct iwl4965_priv *priv,
 	tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags;
 	rs_get_expected_tpt_table(lq_sta, tbl);
 	rs_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq);
-	rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
+	iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
  out:
 	return;
 }
 
 static void rs_get_rate(void *priv_rate, struct net_device *dev,
-			struct ieee80211_hw_mode *mode, struct sk_buff *skb,
+			struct ieee80211_supported_band *sband,
+			struct sk_buff *skb,
 			struct rate_selection *sel)
 {
 
@@ -2020,11 +2167,13 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 	struct sta_info *sta;
 	u16 fc;
-	struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate;
+	struct iwl_priv *priv = (struct iwl_priv *)priv_rate;
 	struct iwl4965_lq_sta *lq_sta;
 
 	IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n");
 
+	rcu_read_lock();
+
 	sta = sta_info_get(local, hdr->addr1);
 
 	/* Send management frames and broadcast/multicast data using lowest
@@ -2032,14 +2181,12 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 	fc = le16_to_cpu(hdr->frame_control);
 	if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) ||
 	    !sta || !sta->rate_ctrl_priv) {
-		sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
-		if (sta)
-			sta_info_put(sta);
-		return;
+		sel->rate = rate_lowest(local, sband, sta);
+		goto out;
 	}
 
 	lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv;
-	i = sta->last_txrate;
+	i = sta->last_txrate_idx;
 
 	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
 	    !lq_sta->ibss_sta_added) {
@@ -2062,14 +2209,15 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 			goto done;
 	}
 
- done:
+done:
 	if ((i < 0) || (i > IWL_RATE_COUNT)) {
-		sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
-		return;
+		sel->rate = rate_lowest(local, sband, sta);
+		goto out;
 	}
-	sta_info_put(sta);
 
 	sel->rate = &priv->ieee_rates[i];
+out:
+	rcu_read_unlock();
 }
 
 static void *rs_alloc_sta(void *priv, gfp_t gfp)
@@ -2099,13 +2247,15 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 {
 	int i, j;
 	struct ieee80211_conf *conf = &local->hw.conf;
-	struct ieee80211_hw_mode *mode = local->oper_hw_mode;
-	struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate;
+	struct ieee80211_supported_band *sband;
+	struct iwl_priv *priv = (struct iwl_priv *)priv_rate;
 	struct iwl4965_lq_sta *lq_sta = priv_sta;
 
+	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+
 	lq_sta->flush_timer = 0;
-	lq_sta->supp_rates = sta->supp_rates;
-	sta->txrate = 3;
+	lq_sta->supp_rates = sta->supp_rates[sband->band];
+	sta->txrate_idx = 3;
 	for (j = 0; j < LQ_SIZE; j++)
 		for (i = 0; i < IWL_RATE_COUNT; i++)
 			rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i]));
@@ -2140,15 +2290,15 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 	}
 
 	/* Find highest tx rate supported by hardware and destination station */
-	for (i = 0; i < mode->num_rates; i++) {
-		if ((sta->supp_rates & BIT(i)) &&
-		    (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED))
-			sta->txrate = i;
-	}
-	sta->last_txrate = sta->txrate;
+	for (i = 0; i < sband->n_bitrates; i++)
+		if (sta->supp_rates[sband->band] & BIT(i))
+			sta->txrate_idx = i;
+
+	sta->last_txrate_idx = sta->txrate_idx;
+	/* WTF is with this bogus comment? A doesn't have cck rates */
 	/* For MODE_IEEE80211A, cck rates are at end of rate table */
-	if (local->hw.conf.phymode == MODE_IEEE80211A)
-		sta->last_txrate += IWL_FIRST_OFDM_RATE;
+	if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
+		sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
 
 	lq_sta->is_dup = 0;
 	lq_sta->valid_antenna = priv->valid_antenna;
@@ -2157,7 +2307,7 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 	lq_sta->active_rate = priv->active_rate;
 	lq_sta->active_rate &= ~(0x1000);
 	lq_sta->active_rate_basic = priv->active_rate_basic;
-	lq_sta->phymode = priv->phymode;
+	lq_sta->band = priv->band;
 #ifdef CONFIG_IWL4965_HT
 	/*
 	 * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3),
@@ -2180,6 +2330,8 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 	IWL_DEBUG_HT("SISO RATE 0x%X MIMO RATE 0x%X\n",
 		     lq_sta->active_siso_rate,
 		     lq_sta->active_mimo_rate);
+	/* as default allow aggregation for all tids */
+	lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
 #endif /*CONFIG_IWL4965_HT*/
 #ifdef CONFIG_MAC80211_DEBUGFS
 	lq_sta->drv = priv;
@@ -2193,7 +2345,7 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 
 static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta,
 			    struct iwl4965_rate *tx_mcs,
-			    struct iwl4965_link_quality_cmd *lq_cmd)
+			    struct iwl_link_quality_cmd *lq_cmd)
 {
 	int index = 0;
 	int rate_idx;
@@ -2207,7 +2359,7 @@ static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta,
 	rs_dbgfs_set_mcs(lq_sta, tx_mcs, index);
 
 	/* Interpret rate_n_flags */
-	rs_get_tbl_info_from_mcs(tx_mcs, lq_sta->phymode,
+	rs_get_tbl_info_from_mcs(tx_mcs, lq_sta->band,
 				  &tbl_type, &rate_idx);
 
 	/* How many times should we repeat the initial rate? */
@@ -2261,7 +2413,7 @@ static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta,
 			index++;
 		}
 
-		rs_get_tbl_info_from_mcs(&new_rate, lq_sta->phymode, &tbl_type,
+		rs_get_tbl_info_from_mcs(&new_rate, lq_sta->band, &tbl_type,
 						&rate_idx);
 
 		/* Indicate to uCode which entries might be MIMO.
@@ -2318,17 +2470,11 @@ static void rs_free(void *priv_rate)
 
 static void rs_clear(void *priv_rate)
 {
-	struct iwl4965_priv *priv = (struct iwl4965_priv *) priv_rate;
+	struct iwl_priv *priv = (struct iwl_priv *) priv_rate;
 
 	IWL_DEBUG_RATE("enter\n");
 
 	priv->lq_mngr.lq_ready = 0;
-#ifdef CONFIG_IWL4965_HT
-#ifdef CONFIG_IWL4965_HT_AGG
-	if (priv->lq_mngr.agg_ctrl.granted_ba)
-		iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);
-#endif /*CONFIG_IWL4965_HT_AGG */
-#endif /* CONFIG_IWL4965_HT */
 
 	IWL_DEBUG_RATE("leave\n");
 }
@@ -2354,7 +2500,7 @@ static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta,
 {
 	u32 base_rate;
 
-	if (lq_sta->phymode == (u8) MODE_IEEE80211A)
+	if (lq_sta->band == IEEE80211_BAND_5GHZ)
 		base_rate = 0x800D;
 	else
 		base_rate = 0x820A;
@@ -2398,7 +2544,7 @@ static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
 
 	if (lq_sta->dbg_fixed.rate_n_flags) {
 		rs_fill_link_cmd(lq_sta, &lq_sta->dbg_fixed, &lq_sta->lq);
-		rs_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC);
+		iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC);
 	}
 
 	return count;
@@ -2495,6 +2641,12 @@ static void rs_add_debugfs(void *priv, void *priv_sta,
 	lq_sta->rs_sta_dbgfs_stats_table_file =
 		debugfs_create_file("rate_stats_table", 0600, dir,
 			lq_sta, &rs_sta_dbgfs_stats_table_ops);
+#ifdef CONFIG_IWL4965_HT
+	lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file =
+		debugfs_create_u8("tx_agg_tid_enable", 0600, dir,
+		&lq_sta->tx_agg_tid_en);
+#endif
+
 }
 
 static void rs_remove_debugfs(void *priv, void *priv_sta)
@@ -2502,6 +2654,9 @@ static void rs_remove_debugfs(void *priv, void *priv_sta)
 	struct iwl4965_lq_sta *lq_sta = priv_sta;
 	debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file);
 	debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file);
+#ifdef CONFIG_IWL4965_HT
+	debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file);
+#endif
 }
 #endif
 
@@ -2525,7 +2680,7 @@ static struct rate_control_ops rs_ops = {
 int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id)
 {
 	struct ieee80211_local *local = hw_to_local(hw);
-	struct iwl4965_priv *priv = hw->priv;
+	struct iwl_priv *priv = hw->priv;
 	struct iwl4965_lq_sta *lq_sta;
 	struct sta_info *sta;
 	int cnt = 0, i;
@@ -2534,13 +2689,15 @@ int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id)
 	u32 max_time = 0;
 	u8 lq_type, antenna;
 
+	rcu_read_lock();
+
 	sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr);
 	if (!sta || !sta->rate_ctrl_priv) {
-		if (sta) {
-			sta_info_put(sta);
+		if (sta)
 			IWL_DEBUG_RATE("leave - no private rate data!\n");
-		} else
+		else
 			IWL_DEBUG_RATE("leave - no station!\n");
+		rcu_read_unlock();
 		return sprintf(buf, "station %d not found\n", sta_id);
 	}
 
@@ -2605,25 +2762,25 @@ int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id)
 
 	cnt += sprintf(&buf[cnt], "\nrate scale type %d antenna %d "
 			 "active_search %d rate index %d\n", lq_type, antenna,
-			 lq_sta->search_better_tbl, sta->last_txrate);
+			 lq_sta->search_better_tbl, sta->last_txrate_idx);
 
-	sta_info_put(sta);
+	rcu_read_unlock();
 	return cnt;
 }
 
 void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
 {
-	struct iwl4965_priv *priv = hw->priv;
+	struct iwl_priv *priv = hw->priv;
 
 	priv->lq_mngr.lq_ready = 1;
 }
 
-void iwl4965_rate_control_register(struct ieee80211_hw *hw)
+int iwl4965_rate_control_register(void)
 {
-	ieee80211_rate_control_register(&rs_ops);
+	return ieee80211_rate_control_register(&rs_ops);
 }
 
-void iwl4965_rate_control_unregister(struct ieee80211_hw *hw)
+void iwl4965_rate_control_unregister(void)
 {
 	ieee80211_rate_control_unregister(&rs_ops);
 }