1 files changed, 500 insertions, 93 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index cab7842a73aa..ff20e5048a55 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -52,7 +52,7 @@
 /* max allowed rate miss before sync LQ cmd */
 #define IWL_MISSED_RATE_MAX             15
 /* max time to accum history 2 seconds */
-#define IWL_RATE_SCALE_FLUSH_INTVL   (2*HZ)
+#define IWL_RATE_SCALE_FLUSH_INTVL   (3*HZ)
 
 static u8 rs_ht_to_legacy[] = {
         IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX,
@@ -100,6 +100,7 @@ struct iwl_scale_tbl_info {
         u8 is_fat;      /* 1 = 40 MHz channel width */
         u8 is_dup;      /* 1 = duplicated data streams */
         u8 action;      /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
+        u8 max_search;  /* maximun number of tables we can search */
         s32 *expected_tpt;      /* throughput metrics; expected_tpt_G, etc. */
         u32 current_rate;  /* rate_n_flags, uCode API format */
         struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
@@ -135,7 +136,7 @@ struct iwl_lq_sta {
         u32 table_count;
         u32 total_failed;       /* total failed frames, any/all rates */
         u32 total_success;      /* total successful frames, any/all rates */
-        u32 flush_timer;        /* time staying in mode before new search */
+        u64 flush_timer;        /* time staying in mode before new search */
 
         u8 action_counter;      /* # mode-switch actions tried */
         u8 is_green;
@@ -160,6 +161,7 @@ struct iwl_lq_sta {
 #ifdef CONFIG_MAC80211_DEBUGFS
         struct dentry *rs_sta_dbgfs_scale_table_file;
         struct dentry *rs_sta_dbgfs_stats_table_file;
+        struct dentry *rs_sta_dbgfs_rate_scale_data_file;
         struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
         u32 dbg_fixed_rate;
 #endif
@@ -167,10 +169,12 @@ struct iwl_lq_sta {
 
         /* used to be in sta_info */
         int last_txrate_idx;
+        /* last tx rate_n_flags */
+        u32 last_rate_n_flags;
 };
 
 static void rs_rate_scale_perform(struct iwl_priv *priv,
-                                   struct ieee80211_hdr *hdr,
+                                   struct sk_buff *skb,
                                    struct ieee80211_sta *sta,
                                    struct iwl_lq_sta *lq_sta);
 static void rs_fill_link_cmd(const struct iwl_priv *priv,
@@ -191,7 +195,7 @@ static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta,
  * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
  * "G" is the only table that supports CCK (the first 4 rates).
  */
-/*FIXME:RS:need to separate tables for MIMO2/MIMO3*/
+
 static s32 expected_tpt_A[IWL_RATE_COUNT] = {
         0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186
 };
@@ -208,11 +212,11 @@ static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = {
         0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211
 };
 
-static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = {
+static s32 expected_tpt_mimo2_20MHz[IWL_RATE_COUNT] = {
         0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251
 };
 
-static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = {
+static s32 expected_tpt_mimo2_20MHzSGI[IWL_RATE_COUNT] = {
         0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257
 };
 
@@ -224,14 +228,50 @@ static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = {
         0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264
 };
 
-static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = {
+static s32 expected_tpt_mimo2_40MHz[IWL_RATE_COUNT] = {
         0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289
 };
 
-static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = {
+static s32 expected_tpt_mimo2_40MHzSGI[IWL_RATE_COUNT] = {
         0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293
 };
 
+/* Expected throughput metric MIMO3 */
+static s32 expected_tpt_mimo3_20MHz[IWL_RATE_COUNT] = {
+        0, 0, 0, 0, 99, 99, 153, 186, 208, 239, 256, 263, 268
+};
+
+static s32 expected_tpt_mimo3_20MHzSGI[IWL_RATE_COUNT] = {
+        0, 0, 0, 0, 106, 106, 162, 194, 215, 246, 262, 268, 273
+};
+
+static s32 expected_tpt_mimo3_40MHz[IWL_RATE_COUNT] = {
+        0, 0, 0, 0, 152, 152, 211, 239, 255, 279, 290, 294, 297
+};
+
+static s32 expected_tpt_mimo3_40MHzSGI[IWL_RATE_COUNT] = {
+        0, 0, 0, 0, 160, 160, 219, 245, 261, 284, 294, 297, 300
+};
+
+/* mbps, mcs */
+const static struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
+  {"1", ""},
+  {"2", ""},
+  {"5.5", ""},
+  {"11", ""},
+  {"6", "BPSK 1/2"},
+  {"9", "BPSK 1/2"},
+  {"12", "QPSK 1/2"},
+  {"18", "QPSK 3/4"},
+  {"24", "16QAM 1/2"},
+  {"36", "16QAM 3/4"},
+  {"48", "64QAM 2/3"},
+  {"54", "64QAM 3/4"},
+  {"60", "64QAM 5/6"}
+};
+
+#define MCS_INDEX_PER_STREAM    (8)
+
 static inline u8 rs_extract_rate(u32 rate_n_flags)
 {
         return (u8)(rate_n_flags & 0xFF);
@@ -543,6 +583,7 @@ static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags,
         tbl->is_dup = 0;
         tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS);
         tbl->lq_type = LQ_NONE;
+        tbl->max_search = IWL_MAX_SEARCH;
 
         /* legacy rate format */
         if (!(rate_n_flags & RATE_MCS_HT_MSK)) {
@@ -576,8 +617,10 @@ static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags,
                                 tbl->lq_type = LQ_MIMO2;
                 /* MIMO3 */
                 } else {
-                        if (num_of_ant == 3)
+                        if (num_of_ant == 3) {
+                                tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
                                 tbl->lq_type = LQ_MIMO3;
+                        }
                 }
         }
         return 0;
@@ -611,19 +654,19 @@ static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags,
         return 1;
 }
 
-/* FIXME:RS: in 4965 we don't use greenfield at all */
-/* FIXME:RS: don't use greenfield for now in TX */
-#if 0
-static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf)
+/* in 4965 we don't use greenfield at all */
+static inline u8 rs_use_green(struct iwl_priv *priv,
+                              struct ieee80211_conf *conf)
 {
-        return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
-                priv->current_ht_config.is_green_field &&
-                !priv->current_ht_config.non_GF_STA_present;
-}
-#endif
-static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf)
-{
-        return 0;
+        u8 is_green;
+
+        if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
+                is_green = 0;
+        else
+                is_green = (conf_is_ht(conf) &&
+                           priv->current_ht_config.is_green_field &&
+                           !priv->current_ht_config.non_GF_STA_present);
+        return is_green;
 }
 
 /**
@@ -735,6 +778,7 @@ static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta,
 
                 tbl->is_fat = 0;
                 tbl->is_SGI = 0;
+                tbl->max_search = IWL_MAX_SEARCH;
         }
 
         rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type);
@@ -793,7 +837,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
         IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n");
 
         if (!ieee80211_is_data(hdr->frame_control) ||
-            is_multicast_ether_addr(hdr->addr1))
+            info->flags & IEEE80211_TX_CTL_NO_ACK)
                 return;
 
         /* This packet was aggregated but doesn't carry rate scale info */
@@ -902,6 +946,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
          * else look up the rate that was, finally, successful.
          */
         tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags);
+        lq_sta->last_rate_n_flags = tx_rate;
         rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index);
 
         /* Update frame history window with "success" if Tx got ACKed ... */
@@ -958,7 +1003,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
 
         /* See if there's a better rate or modulation mode to try. */
         if (sta && sta->supp_rates[sband->band])
-                rs_rate_scale_perform(priv, hdr, sta, lq_sta);
+                rs_rate_scale_perform(priv, skb, sta, lq_sta);
 out:
         return;
 }
@@ -988,6 +1033,8 @@ static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy,
         lq_sta->table_count = 0;
         lq_sta->total_failed = 0;
         lq_sta->total_success = 0;
+        lq_sta->flush_timer = jiffies;
+        lq_sta->action_counter = 0;
 }
 
 /*
@@ -1011,17 +1058,26 @@ static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
                         tbl->expected_tpt = expected_tpt_siso20MHzSGI;
                 else
                         tbl->expected_tpt = expected_tpt_siso20MHz;
-
-        } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */
+        } else if (is_mimo2(tbl->lq_type)) {
                 if (tbl->is_fat && !lq_sta->is_dup)
                         if (tbl->is_SGI)
-                                tbl->expected_tpt = expected_tpt_mimo40MHzSGI;
+                                tbl->expected_tpt = expected_tpt_mimo2_40MHzSGI;
                         else
-                                tbl->expected_tpt = expected_tpt_mimo40MHz;
+                                tbl->expected_tpt = expected_tpt_mimo2_40MHz;
                 else if (tbl->is_SGI)
-                        tbl->expected_tpt = expected_tpt_mimo20MHzSGI;
+                        tbl->expected_tpt = expected_tpt_mimo2_20MHzSGI;
                 else
-                        tbl->expected_tpt = expected_tpt_mimo20MHz;
+                        tbl->expected_tpt = expected_tpt_mimo2_20MHz;
+        } else if (is_mimo3(tbl->lq_type)) {
+                if (tbl->is_fat && !lq_sta->is_dup)
+                        if (tbl->is_SGI)
+                                tbl->expected_tpt = expected_tpt_mimo3_40MHzSGI;
+                        else
+                                tbl->expected_tpt = expected_tpt_mimo3_40MHz;
+                else if (tbl->is_SGI)
+                        tbl->expected_tpt = expected_tpt_mimo3_20MHzSGI;
+                else
+                        tbl->expected_tpt = expected_tpt_mimo3_20MHz;
         } else
                 tbl->expected_tpt = expected_tpt_G;
 }
@@ -1130,7 +1186,7 @@ static s32 rs_get_best_rate(struct iwl_priv *priv,
 }
 
 /*
- * Set up search table for MIMO
+ * Set up search table for MIMO2
  */
 static int rs_switch_to_mimo2(struct iwl_priv *priv,
                              struct iwl_lq_sta *lq_sta,
@@ -1158,10 +1214,10 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv,
         tbl->lq_type = LQ_MIMO2;
         tbl->is_dup = lq_sta->is_dup;
         tbl->action = 0;
+        tbl->max_search = IWL_MAX_SEARCH;
         rate_mask = lq_sta->active_mimo2_rate;
 
-        if (priv->current_ht_config.supported_chan_width
-                                        == IWL_CHANNEL_WIDTH_40MHZ)
+        if (iwl_is_fat_tx_allowed(priv, &sta->ht_cap))
                 tbl->is_fat = 1;
         else
                 tbl->is_fat = 0;
@@ -1183,7 +1239,73 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv,
         rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
 
         IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
+        if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
+                IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
+                                                rate, rate_mask);
+                return -1;
+        }
+        tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
+
+        IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n",
+                     tbl->current_rate, is_green);
+        return 0;
+}
+
+/*
+ * Set up search table for MIMO3
+ */
+static int rs_switch_to_mimo3(struct iwl_priv *priv,
+                             struct iwl_lq_sta *lq_sta,
+                             struct ieee80211_conf *conf,
+                             struct ieee80211_sta *sta,
+                             struct iwl_scale_tbl_info *tbl, int index)
+{
+        u16 rate_mask;
+        s32 rate;
+        s8 is_green = lq_sta->is_green;
+
+        if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
+                return -1;
+
+        if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2)
+                                                == WLAN_HT_CAP_SM_PS_STATIC)
+                return -1;
+
+        /* Need both Tx chains/antennas to support MIMO */
+        if (priv->hw_params.tx_chains_num < 3)
+                return -1;
+
+        IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n");
+
+        tbl->lq_type = LQ_MIMO3;
+        tbl->is_dup = lq_sta->is_dup;
+        tbl->action = 0;
+        tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH;
+        rate_mask = lq_sta->active_mimo3_rate;
+
+        if (iwl_is_fat_tx_allowed(priv, &sta->ht_cap))
+                tbl->is_fat = 1;
+        else
+                tbl->is_fat = 0;
 
+        /* FIXME: - don't toggle SGI here
+        if (tbl->is_fat) {
+                if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY)
+                        tbl->is_SGI = 1;
+                else
+                        tbl->is_SGI = 0;
+        } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY)
+                tbl->is_SGI = 1;
+        else
+                tbl->is_SGI = 0;
+        */
+
+        rs_set_expected_tpt_table(lq_sta, tbl);
+
+        rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index);
+
+        IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n",
+                rate, rate_mask);
         if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) {
                 IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n",
                                                 rate, rate_mask);
@@ -1217,10 +1339,10 @@ static int rs_switch_to_siso(struct iwl_priv *priv,
         tbl->is_dup = lq_sta->is_dup;
         tbl->lq_type = LQ_SISO;
         tbl->action = 0;
+        tbl->max_search = IWL_MAX_SEARCH;
         rate_mask = lq_sta->active_siso_rate;
 
-        if (priv->current_ht_config.supported_chan_width
-            == IWL_CHANNEL_WIDTH_40MHZ)
+        if (iwl_is_fat_tx_allowed(priv, &sta->ht_cap))
                 tbl->is_fat = 1;
         else
                 tbl->is_fat = 0;
@@ -1274,15 +1396,15 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
         u8 valid_tx_ant = priv->hw_params.valid_tx_ant;
         u8 tx_chains_num = priv->hw_params.tx_chains_num;
         int ret = 0;
+        u8 update_search_tbl_counter = 0;
 
         for (; ;) {
+                lq_sta->action_counter++;
                 switch (tbl->action) {
                 case IWL_LEGACY_SWITCH_ANTENNA1:
                 case IWL_LEGACY_SWITCH_ANTENNA2:
                         IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n");
 
-                        lq_sta->action_counter++;
-
                         if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 &&
                                                         tx_chains_num <= 1) ||
                             (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 &&
@@ -1298,6 +1420,7 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
 
                         if (rs_toggle_antenna(valid_tx_ant,
                                 &search_tbl->current_rate, search_tbl)) {
+                                update_search_tbl_counter = 1;
                                 rs_set_expected_tpt_table(lq_sta, search_tbl);
                                 goto out;
                         }
@@ -1342,9 +1465,29 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
                                 goto out;
                         }
                         break;
+
+                case IWL_LEGACY_SWITCH_MIMO3_ABC:
+                        IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n");
+
+                        /* Set up search table to try MIMO3 */
+                        memcpy(search_tbl, tbl, sz);
+                        search_tbl->is_SGI = 0;
+
+                        search_tbl->ant_type = ANT_ABC;
+
+                        if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
+                                break;
+
+                        ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
+                                                 search_tbl, index);
+                        if (!ret) {
+                                lq_sta->action_counter = 0;
+                                goto out;
+                        }
+                        break;
                 }
                 tbl->action++;
-                if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC)
+                if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
                         tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
 
                 if (tbl->action == start_action)
@@ -1357,8 +1500,10 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
 out:
         lq_sta->search_better_tbl = 1;
         tbl->action++;
-        if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC)
+        if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
                 tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
+        if (update_search_tbl_counter)
+                search_tbl->action = tbl->action;
         return 0;
 
 }
@@ -1381,6 +1526,7 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
         u8 start_action = tbl->action;
         u8 valid_tx_ant = priv->hw_params.valid_tx_ant;
         u8 tx_chains_num = priv->hw_params.tx_chains_num;
+        u8 update_search_tbl_counter = 0;
         int ret;
 
         for (;;) {
@@ -1401,8 +1547,10 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
 
                         memcpy(search_tbl, tbl, sz);
                         if (rs_toggle_antenna(valid_tx_ant,
-                                       &search_tbl->current_rate, search_tbl))
+                                       &search_tbl->current_rate, search_tbl)) {
+                                update_search_tbl_counter = 1;
                                 goto out;
+                        }
                         break;
                 case IWL_SISO_SWITCH_MIMO2_AB:
                 case IWL_SISO_SWITCH_MIMO2_AC:
@@ -1456,10 +1604,25 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
                         search_tbl->current_rate =
                                 rate_n_flags_from_tbl(priv, search_tbl,
                                                       index, is_green);
+                        update_search_tbl_counter = 1;
                         goto out;
+                case IWL_SISO_SWITCH_MIMO3_ABC:
+                        IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n");
+                        memcpy(search_tbl, tbl, sz);
+                        search_tbl->is_SGI = 0;
+                        search_tbl->ant_type = ANT_ABC;
+
+                        if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
+                                break;
+
+                        ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
+                                                 search_tbl, index);
+                        if (!ret)
+                                goto out;
+                        break;
                 }
                 tbl->action++;
-                if (tbl->action > IWL_SISO_SWITCH_GI)
+                if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC)
                         tbl->action = IWL_SISO_SWITCH_ANTENNA1;
 
                 if (tbl->action == start_action)
@@ -1471,15 +1634,18 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
  out:
         lq_sta->search_better_tbl = 1;
         tbl->action++;
-        if (tbl->action > IWL_SISO_SWITCH_GI)
+        if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC)
                 tbl->action = IWL_SISO_SWITCH_ANTENNA1;
+        if (update_search_tbl_counter)
+                search_tbl->action = tbl->action;
+
         return 0;
 }
 
 /*
- * Try to switch to new modulation mode from MIMO
+ * Try to switch to new modulation mode from MIMO2
  */
-static int rs_move_mimo_to_other(struct iwl_priv *priv,
+static int rs_move_mimo2_to_other(struct iwl_priv *priv,
                                  struct iwl_lq_sta *lq_sta,
                                  struct ieee80211_conf *conf,
                                  struct ieee80211_sta *sta, int index)
@@ -1494,6 +1660,7 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
         u8 start_action = tbl->action;
         u8 valid_tx_ant = priv->hw_params.valid_tx_ant;
         u8 tx_chains_num = priv->hw_params.tx_chains_num;
+        u8 update_search_tbl_counter = 0;
         int ret;
 
         for (;;) {
@@ -1501,7 +1668,7 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
                 switch (tbl->action) {
                 case IWL_MIMO2_SWITCH_ANTENNA1:
                 case IWL_MIMO2_SWITCH_ANTENNA2:
-                        IWL_DEBUG_RATE(priv, "LQ: MIMO toggle Antennas\n");
+                        IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n");
 
                         if (tx_chains_num <= 2)
                                 break;
@@ -1511,8 +1678,10 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
 
                         memcpy(search_tbl, tbl, sz);
                         if (rs_toggle_antenna(valid_tx_ant,
-                                       &search_tbl->current_rate, search_tbl))
+                                       &search_tbl->current_rate, search_tbl)) {
+                                update_search_tbl_counter = 1;
                                 goto out;
+                        }
                         break;
                 case IWL_MIMO2_SWITCH_SISO_A:
                 case IWL_MIMO2_SWITCH_SISO_B:
@@ -1549,9 +1718,9 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
                                                 HT_SHORT_GI_40MHZ))
                                 break;
 
-                        IWL_DEBUG_RATE(priv, "LQ: MIMO toggle SGI/NGI\n");
+                        IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n");
 
-                        /* Set up new search table for MIMO */
+                        /* Set up new search table for MIMO2 */
                         memcpy(search_tbl, tbl, sz);
                         search_tbl->is_SGI = !tbl->is_SGI;
                         rs_set_expected_tpt_table(lq_sta, search_tbl);
@@ -1569,11 +1738,27 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
                         search_tbl->current_rate =
                                 rate_n_flags_from_tbl(priv, search_tbl,
                                                       index, is_green);
+                        update_search_tbl_counter = 1;
                         goto out;
 
+                case IWL_MIMO2_SWITCH_MIMO3_ABC:
+                        IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n");
+                        memcpy(search_tbl, tbl, sz);
+                        search_tbl->is_SGI = 0;
+                        search_tbl->ant_type = ANT_ABC;
+
+                        if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
+                                break;
+
+                        ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta,
+                                                 search_tbl, index);
+                        if (!ret)
+                                goto out;
+
+                        break;
                 }
                 tbl->action++;
-                if (tbl->action > IWL_MIMO2_SWITCH_GI)
+                if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
                         tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
 
                 if (tbl->action == start_action)
@@ -1584,8 +1769,153 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
  out:
         lq_sta->search_better_tbl = 1;
         tbl->action++;
-        if (tbl->action > IWL_MIMO2_SWITCH_GI)
+        if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC)
                 tbl->action = IWL_MIMO2_SWITCH_ANTENNA1;
+        if (update_search_tbl_counter)
+                search_tbl->action = tbl->action;
+
+        return 0;
+
+}
+
+/*
+ * Try to switch to new modulation mode from MIMO3
+ */
+static int rs_move_mimo3_to_other(struct iwl_priv *priv,
+                                 struct iwl_lq_sta *lq_sta,
+                                 struct ieee80211_conf *conf,
+                                 struct ieee80211_sta *sta, int index)
+{
+        s8 is_green = lq_sta->is_green;
+        struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
+        struct iwl_scale_tbl_info *search_tbl =
+                                &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
+        struct iwl_rate_scale_data *window = &(tbl->win[index]);
+        u32 sz = (sizeof(struct iwl_scale_tbl_info) -
+                  (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT));
+        u8 start_action = tbl->action;
+        u8 valid_tx_ant = priv->hw_params.valid_tx_ant;
+        u8 tx_chains_num = priv->hw_params.tx_chains_num;
+        int ret;
+        u8 update_search_tbl_counter = 0;
+
+        for (;;) {
+                lq_sta->action_counter++;
+                switch (tbl->action) {
+                case IWL_MIMO3_SWITCH_ANTENNA1:
+                case IWL_MIMO3_SWITCH_ANTENNA2:
+                        IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n");
+
+                        if (tx_chains_num <= 3)
+                                break;
+
+                        if (window->success_ratio >= IWL_RS_GOOD_RATIO)
+                                break;
+
+                        memcpy(search_tbl, tbl, sz);
+                        if (rs_toggle_antenna(valid_tx_ant,
+                                       &search_tbl->current_rate, search_tbl))
+                                goto out;
+                        break;
+                case IWL_MIMO3_SWITCH_SISO_A:
+                case IWL_MIMO3_SWITCH_SISO_B:
+                case IWL_MIMO3_SWITCH_SISO_C:
+                        IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n");
+
+                        /* Set up new search table for SISO */
+                        memcpy(search_tbl, tbl, sz);
+
+                        if (tbl->action == IWL_MIMO3_SWITCH_SISO_A)
+                                search_tbl->ant_type = ANT_A;
+                        else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B)
+                                search_tbl->ant_type = ANT_B;
+                        else
+                                search_tbl->ant_type = ANT_C;
+
+                        if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
+                                break;
+
+                        ret = rs_switch_to_siso(priv, lq_sta, conf, sta,
+                                                 search_tbl, index);
+                        if (!ret)
+                                goto out;
+
+                        break;
+
+                case IWL_MIMO3_SWITCH_MIMO2_AB:
+                case IWL_MIMO3_SWITCH_MIMO2_AC:
+                case IWL_MIMO3_SWITCH_MIMO2_BC:
+                        IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n");
+
+                        memcpy(search_tbl, tbl, sz);
+                        search_tbl->is_SGI = 0;
+                        if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB)
+                                search_tbl->ant_type = ANT_AB;
+                        else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC)
+                                search_tbl->ant_type = ANT_AC;
+                        else
+                                search_tbl->ant_type = ANT_BC;
+
+                        if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type))
+                                break;
+
+                        ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta,
+                                                 search_tbl, index);
+                        if (!ret)
+                                goto out;
+
+                        break;
+
+                case IWL_MIMO3_SWITCH_GI:
+                        if (!tbl->is_fat &&
+                                !(priv->current_ht_config.sgf &
+                                                HT_SHORT_GI_20MHZ))
+                                break;
+                        if (tbl->is_fat &&
+                                !(priv->current_ht_config.sgf &
+                                                HT_SHORT_GI_40MHZ))
+                                break;
+
+                        IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n");
+
+                        /* Set up new search table for MIMO */
+                        memcpy(search_tbl, tbl, sz);
+                        search_tbl->is_SGI = !tbl->is_SGI;
+                        rs_set_expected_tpt_table(lq_sta, search_tbl);
+                        /*
+                         * If active table already uses the fastest possible
+                         * modulation (dual stream with short guard interval),
+                         * and it's working well, there's no need to look
+                         * for a better type of modulation!
+                         */
+                        if (tbl->is_SGI) {
+                                s32 tpt = lq_sta->last_tpt / 100;
+                                if (tpt >= search_tbl->expected_tpt[index])
+                                        break;
+                        }
+                        search_tbl->current_rate =
+                                rate_n_flags_from_tbl(priv, search_tbl,
+                                                      index, is_green);
+                        update_search_tbl_counter = 1;
+                        goto out;
+                }
+                tbl->action++;
+                if (tbl->action > IWL_MIMO3_SWITCH_GI)
+                        tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
+
+                if (tbl->action == start_action)
+                        break;
+        }
+        search_tbl->lq_type = LQ_NONE;
+        return 0;
+ out:
+        lq_sta->search_better_tbl = 1;
+        tbl->action++;
+        if (tbl->action > IWL_MIMO3_SWITCH_GI)
+                tbl->action = IWL_MIMO3_SWITCH_ANTENNA1;
+        if (update_search_tbl_counter)
+                search_tbl->action = tbl->action;
+
         return 0;
 
 }
@@ -1616,8 +1946,8 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta)
                 /* Elapsed time using current modulation mode */
                 if (lq_sta->flush_timer)
                         flush_interval_passed =
-                            time_after(jiffies,
-                                       (unsigned long)(lq_sta->flush_timer +
+                        time_after(jiffies,
+                                        (unsigned long)(lq_sta->flush_timer +
                                         IWL_RATE_SCALE_FLUSH_INTVL));
 
                 /*
@@ -1676,12 +2006,14 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta)
  * Do rate scaling and search for new modulation mode.
  */
 static void rs_rate_scale_perform(struct iwl_priv *priv,
-                                  struct ieee80211_hdr *hdr,
+                                  struct sk_buff *skb,
                                   struct ieee80211_sta *sta,
                                   struct iwl_lq_sta *lq_sta)
 {
         struct ieee80211_hw *hw = priv->hw;
         struct ieee80211_conf *conf = &hw->conf;
+        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
         int low = IWL_RATE_INVALID;
         int high = IWL_RATE_INVALID;
         int index;
@@ -1707,11 +2039,10 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
 
         IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n");
 
-        /* Send management frames and broadcast/multicast data using
-         * lowest rate. */
+        /* Send management frames and NO_ACK data using lowest rate. */
         /* TODO: this could probably be improved.. */
         if (!ieee80211_is_data(hdr->frame_control) ||
-            is_multicast_ether_addr(hdr->addr1))
+            info->flags & IEEE80211_TX_CTL_NO_ACK)
                 return;
 
         if (!sta || !lq_sta)
@@ -1732,6 +2063,10 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
                 active_tbl = 1 - lq_sta->active_tbl;
 
         tbl = &(lq_sta->lq_info[active_tbl]);
+        if (is_legacy(tbl->lq_type))
+                lq_sta->is_green = 0;
+        else
+                lq_sta->is_green = rs_use_green(priv, conf);
         is_green = lq_sta->is_green;
 
         /* current tx rate */
@@ -1951,6 +2286,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
                         update_lq = 1;
                         index = low;
                 }
+
                 break;
         case 1:
                 /* Increase starting rate, update uCode's rate table */
@@ -1997,8 +2333,10 @@ lq_update:
                         rs_move_legacy_other(priv, lq_sta, conf, sta, index);
                 else if (is_siso(tbl->lq_type))
                         rs_move_siso_to_other(priv, lq_sta, conf, sta, index);
+                else if (is_mimo2(tbl->lq_type))
+                        rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index);
                 else
-                        rs_move_mimo_to_other(priv, lq_sta, conf, sta, index);
+                        rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index);
 
                 /* If new "search" mode was selected, set up in uCode table */
                 if (lq_sta->search_better_tbl) {
@@ -2014,8 +2352,11 @@ lq_update:
                                      tbl->current_rate, index);
                         rs_fill_link_cmd(priv, lq_sta, tbl->current_rate);
                         iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
-                }
+                } else
+                        done_search = 1;
+        }
 
+        if (done_search && !lq_sta->stay_in_tbl) {
                 /* If the "active" (non-search) mode was legacy,
                  * and we've tried switching antennas,
                  * but we haven't been able to try HT modes (not available),
@@ -2023,8 +2364,7 @@ lq_update:
                  * before next round of mode comparisons. */
                 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
                 if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) &&
-                    lq_sta->action_counter >= 1) {
-                        lq_sta->action_counter = 0;
+                    lq_sta->action_counter > tbl1->max_search) {
                         IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n");
                         rs_set_stay_in_table(priv, 1, lq_sta);
                 }
@@ -2033,7 +2373,7 @@ lq_update:
                  * have been tried and compared, stay in this best modulation
                  * mode for a while before next round of mode comparisons. */
                 if (lq_sta->enable_counter &&
-                    (lq_sta->action_counter >= IWL_ACTION_LIMIT)) {
+                    (lq_sta->action_counter >= tbl1->max_search)) {
                         if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
                             (lq_sta->tx_agg_tid_en & (1 << tid)) &&
                             (tid != MAX_TID_COUNT)) {
@@ -2047,20 +2387,8 @@ lq_update:
                                                           lq_sta, sta);
                                 }
                         }
-                        lq_sta->action_counter = 0;
                         rs_set_stay_in_table(priv, 0, lq_sta);
                 }
-
-        /*
-         * Else, don't search for a new modulation mode.
-         * Put new timestamp in stay-in-modulation-mode flush timer if:
-         * 1)  Not changing rates right now
-         * 2)  Not just finishing up a search
-         * 3)  flush timer is empty
-         */
-        } else {
-                if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer))
-                        lq_sta->flush_timer = jiffies;
         }
 
 out:
@@ -2156,16 +2484,17 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
         if (sta)
                 mask_bit = sta->supp_rates[sband->band];
 
-        /* Send management frames and broadcast/multicast data using lowest
-         * rate. */
+        /* Send management frames and NO_ACK data using lowest rate. */
         if (!ieee80211_is_data(hdr->frame_control) ||
-            is_multicast_ether_addr(hdr->addr1) || !sta || !lq_sta) {
+            info->flags & IEEE80211_TX_CTL_NO_ACK || !sta || !lq_sta) {
                 if (!mask_bit)
                         info->control.rates[0].idx =
                                         rate_lowest_index(sband, NULL);
                 else
                         info->control.rates[0].idx =
                                         rate_lowest_index(sband, sta);
+                if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+                        info->control.rates[0].count = 1;
                 return;
         }
 
@@ -2178,8 +2507,8 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
                 if (sta_id == IWL_INVALID_STATION) {
                         IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n",
                                        hdr->addr1);
-                        sta_id = iwl_add_station_flags(priv, hdr->addr1,
-                                                        0, CMD_ASYNC, NULL);
+                        sta_id = iwl_add_station(priv, hdr->addr1,
+                                                false, CMD_ASYNC, NULL);
                 }
                 if ((sta_id != IWL_INVALID_STATION)) {
                         lq_sta->lq.sta_id = sta_id;
@@ -2189,12 +2518,33 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
                 }
         }
 
-        if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT)
-                rate_idx = rate_lowest_index(sband, sta);
-        else if (sband->band == IEEE80211_BAND_5GHZ)
+        if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) {
                 rate_idx -= IWL_FIRST_OFDM_RATE;
-
+                /* 6M and 9M shared same MCS index */
+                rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0;
+                if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
+                    IWL_RATE_MIMO3_6M_PLCP)
+                        rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM);
+                else if (rs_extract_rate(lq_sta->last_rate_n_flags) >=
+                         IWL_RATE_MIMO2_6M_PLCP)
+                        rate_idx = rate_idx + MCS_INDEX_PER_STREAM;
+                info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
+                if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK)
+                        info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI;
+                if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK)
+                        info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA;
+                if (lq_sta->last_rate_n_flags & RATE_MCS_FAT_MSK)
+                        info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+                if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK)
+                        info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD;
+        } else {
+                if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT)
+                        rate_idx = rate_lowest_index(sband, sta);
+                else if (sband->band == IEEE80211_BAND_5GHZ)
+                        rate_idx -= IWL_FIRST_OFDM_RATE;
+        }
         info->control.rates[0].idx = rate_idx;
+
 }
 
 static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta,
@@ -2246,15 +2596,16 @@ static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband,
 
         lq_sta->ibss_sta_added = 0;
         if (priv->iw_mode == NL80211_IFTYPE_AP) {
-                u8 sta_id = iwl_find_station(priv, sta->addr);
+                u8 sta_id = iwl_find_station(priv,
+                                                                sta->addr);
 
                 /* for IBSS the call are from tasklet */
                 IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr);
 
                 if (sta_id == IWL_INVALID_STATION) {
                         IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr);
-                        sta_id = iwl_add_station_flags(priv, sta->addr,
-                                                        0, CMD_ASYNC, NULL);
+                        sta_id = iwl_add_station(priv, sta->addr, false,
+                                                CMD_ASYNC, NULL);
                 }
                 if ((sta_id != IWL_INVALID_STATION)) {
                         lq_sta->lq.sta_id = sta_id;
@@ -2436,9 +2787,10 @@ static void rs_fill_link_cmd(const struct iwl_priv *priv,
                 repeat_rate--;
         }
 
-        lq_cmd->agg_params.agg_frame_cnt_limit = 64;
-        lq_cmd->agg_params.agg_dis_start_th = 3;
-        lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000);
+        lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_MAX;
+        lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
+        lq_cmd->agg_params.agg_time_limit =
+                cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 }
 
 static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
@@ -2539,6 +2891,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
         char *buff;
         int desc = 0;
         int i = 0;
+        int index = 0;
         ssize_t ret;
 
         struct iwl_lq_sta *lq_sta = file->private_data;
@@ -2568,8 +2921,11 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
                    ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3"));
                    desc += sprintf(buff+desc, " %s",
                    (tbl->is_fat) ? "40MHz" : "20MHz");
-                desc += sprintf(buff+desc, " %s\n", (tbl->is_SGI) ? "SGI" : "");
+                   desc += sprintf(buff+desc, " %s %s\n", (tbl->is_SGI) ? "SGI" : "",
+                   (lq_sta->is_green) ? "GF enabled" : "");
         }
+        desc += sprintf(buff+desc, "last tx rate=0x%X\n",
+                lq_sta->last_rate_n_flags);
         desc += sprintf(buff+desc, "general:"
                 "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
                 lq_sta->lq.general_params.flags,
@@ -2590,10 +2946,19 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
                         lq_sta->lq.general_params.start_rate_index[2],
                         lq_sta->lq.general_params.start_rate_index[3]);
 
-
-        for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
-                desc += sprintf(buff+desc, " rate[%d] 0x%X\n",
-                        i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags));
+        for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
+                index = iwl_hwrate_to_plcp_idx(
+                        le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags));
+                if (is_legacy(tbl->lq_type)) {
+                        desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n",
+                                i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
+                                iwl_rate_mcs[index].mbps);
+                } else {
+                        desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n",
+                                i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
+                                iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs);
+                }
+        }
 
         ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
         kfree(buff);
@@ -2620,13 +2985,14 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
                 return -ENOMEM;
 
         for (i = 0; i < LQ_SIZE; i++) {
-                desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n"
+                desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d GF=%d\n"
                                 "rate=0x%X\n",
                                 lq_sta->active_tbl == i ? "*" : "x",
                                 lq_sta->lq_info[i].lq_type,
                                 lq_sta->lq_info[i].is_SGI,
                                 lq_sta->lq_info[i].is_fat,
                                 lq_sta->lq_info[i].is_dup,
+                                lq_sta->is_green,
                                 lq_sta->lq_info[i].current_rate);
                 for (j = 0; j < IWL_RATE_COUNT; j++) {
                         desc += sprintf(buff+desc,
@@ -2646,6 +3012,43 @@ static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
         .open = open_file_generic,
 };
 
+static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file,
+                        char __user *user_buf, size_t count, loff_t *ppos)
+{
+        char buff[120];
+        int desc = 0;
+        ssize_t ret;
+
+        struct iwl_lq_sta *lq_sta = file->private_data;
+        struct iwl_priv *priv;
+        struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];
+
+        priv = lq_sta->drv;
+
+        if (is_Ht(tbl->lq_type))
+                desc += sprintf(buff+desc,
+                                "Bit Rate= %d Mb/s\n",
+                                tbl->expected_tpt[lq_sta->last_txrate_idx]);
+        else
+                desc += sprintf(buff+desc,
+                                "Bit Rate= %d Mb/s\n",
+                                iwl_rates[lq_sta->last_txrate_idx].ieee >> 1);
+        desc += sprintf(buff+desc,
+                        "Signal Level= %d dBm\tNoise Level= %d dBm\n",
+                        priv->last_rx_rssi, priv->last_rx_noise);
+        desc += sprintf(buff+desc,
+                        "Tsf= 0x%llx\tBeacon time= 0x%08X\n",
+                        priv->last_tsf, priv->last_beacon_time);
+
+        ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
+        return ret;
+}
+
+static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = {
+        .read = rs_sta_dbgfs_rate_scale_data_read,
+        .open = open_file_generic,
+};
+
 static void rs_add_debugfs(void *priv, void *priv_sta,
                                         struct dentry *dir)
 {
@@ -2656,6 +3059,9 @@ 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);
+        lq_sta->rs_sta_dbgfs_rate_scale_data_file =
+                debugfs_create_file("rate_scale_data", 0600, dir,
+                        lq_sta, &rs_sta_dbgfs_rate_scale_data_ops);
         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);
@@ -2667,6 +3073,7 @@ static void rs_remove_debugfs(void *priv, void *priv_sta)
         struct iwl_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);
+        debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file);
         debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file);
 }
 #endif