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 d06462264147..b608e1ca8b40 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);
 }