Merge commit 'wireless/master'

1 files changed, 80 insertions, 9 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 0a71bb55d0ee..4c88e8715df2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -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 */
@@ -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
@@ -579,6 +581,7 @@ 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)) {
@@ -612,8 +615,10 @@ 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;
@@ -771,6 +776,7 @@ 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);
@@ -1026,6 +1032,7 @@ static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy,
 	lq_sta->total_failed = 0;
 	lq_sta->total_success = 0;
 	lq_sta->flush_timer = jiffies;
+	lq_sta->action_counter = 0;
 }
 
 /*
@@ -1205,6 +1212,7 @@ 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 (iwl_is_fat_tx_allowed(priv, &sta->ht_cap))
@@ -1270,6 +1278,7 @@ static int rs_switch_to_mimo3(struct iwl_priv *priv,
 	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))
@@ -1328,6 +1337,7 @@ 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 (iwl_is_fat_tx_allowed(priv, &sta->ht_cap))
@@ -1384,15 +1394,15 @@ 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 &&
@@ -1408,6 +1418,7 @@ 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;
 			}
@@ -1489,6 +1500,8 @@ out:
 	tbl->action++;
 	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;
 
 }
@@ -1511,6 +1524,7 @@ 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 (;;) {
@@ -1531,8 +1545,10 @@ 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:
@@ -1586,6 +1602,7 @@ 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");
@@ -1617,6 +1634,9 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
 	tbl->action++;
 	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;
 }
 
@@ -1638,6 +1658,7 @@ static int rs_move_mimo2_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 (;;) {
@@ -1655,8 +1676,10 @@ static int rs_move_mimo2_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:
@@ -1713,6 +1736,7 @@ static int rs_move_mimo2_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:
@@ -1745,6 +1769,9 @@ static int rs_move_mimo2_to_other(struct iwl_priv *priv,
 	tbl->action++;
 	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;
 
 }
@@ -1768,6 +1795,7 @@ static int rs_move_mimo3_to_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;
+	u8 update_search_tbl_counter = 0;
 
 	for (;;) {
 		lq_sta->action_counter++;
@@ -1866,6 +1894,7 @@ static int rs_move_mimo3_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;
 		}
 		tbl->action++;
@@ -1882,6 +1911,9 @@ static int rs_move_mimo3_to_other(struct iwl_priv *priv,
 	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;
 
 }
@@ -2326,8 +2358,7 @@ 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);
 		}
@@ -2336,7 +2367,7 @@ 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)) {
@@ -2350,7 +2381,6 @@ lq_update:
 							  lq_sta, sta);
 				}
 			}
-			lq_sta->action_counter = 0;
 			rs_set_stay_in_table(priv, 0, lq_sta);
 		}
 	}
@@ -2955,6 +2985,43 @@ 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)
 {
@@ -2965,6 +3032,9 @@ 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);
@@ -2976,6 +3046,7 @@ 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