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path: root/drivers/net/wireless/realtek/rtlwifi/stats.c
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Diffstat (limited to 'drivers/net/wireless/realtek/rtlwifi/stats.c')
-rw-r--r--drivers/net/wireless/realtek/rtlwifi/stats.c268
1 files changed, 268 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtlwifi/stats.c b/drivers/net/wireless/realtek/rtlwifi/stats.c
new file mode 100644
index 000000000000..d8b30690b00d
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/stats.c
@@ -0,0 +1,268 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2009-2012 Realtek Corporation.
+ *
+ * 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
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * wlanfae <wlanfae@realtek.com>
+ * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
+ * Hsinchu 300, Taiwan.
+ *
+ * Larry Finger <Larry.Finger@lwfinger.net>
+ *
+ *****************************************************************************/
+#include "wifi.h"
+#include "stats.h"
+#include <linux/export.h>
+
+u8 rtl_query_rxpwrpercentage(char antpower)
+{
+ if ((antpower <= -100) || (antpower >= 20))
+ return 0;
+ else if (antpower >= 0)
+ return 100;
+ else
+ return 100 + antpower;
+}
+EXPORT_SYMBOL(rtl_query_rxpwrpercentage);
+
+u8 rtl_evm_db_to_percentage(char value)
+{
+ char ret_val = clamp(-value, 0, 33) * 3;
+
+ if (ret_val == 99)
+ ret_val = 100;
+
+ return ret_val;
+}
+EXPORT_SYMBOL(rtl_evm_db_to_percentage);
+
+static long rtl_translate_todbm(struct ieee80211_hw *hw,
+ u8 signal_strength_index)
+{
+ long signal_power;
+
+ signal_power = (long)((signal_strength_index + 1) >> 1);
+ signal_power -= 95;
+ return signal_power;
+}
+
+long rtl_signal_scale_mapping(struct ieee80211_hw *hw, long currsig)
+{
+ long retsig;
+
+ if (currsig >= 61 && currsig <= 100)
+ retsig = 90 + ((currsig - 60) / 4);
+ else if (currsig >= 41 && currsig <= 60)
+ retsig = 78 + ((currsig - 40) / 2);
+ else if (currsig >= 31 && currsig <= 40)
+ retsig = 66 + (currsig - 30);
+ else if (currsig >= 21 && currsig <= 30)
+ retsig = 54 + (currsig - 20);
+ else if (currsig >= 5 && currsig <= 20)
+ retsig = 42 + (((currsig - 5) * 2) / 3);
+ else if (currsig == 4)
+ retsig = 36;
+ else if (currsig == 3)
+ retsig = 27;
+ else if (currsig == 2)
+ retsig = 18;
+ else if (currsig == 1)
+ retsig = 9;
+ else
+ retsig = currsig;
+
+ return retsig;
+}
+EXPORT_SYMBOL(rtl_signal_scale_mapping);
+
+static void rtl_process_ui_rssi(struct ieee80211_hw *hw,
+ struct rtl_stats *pstatus)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+ u8 rfpath;
+ u32 last_rssi, tmpval;
+
+ if (!pstatus->packet_toself && !pstatus->packet_beacon)
+ return;
+
+ rtlpriv->stats.pwdb_all_cnt += pstatus->rx_pwdb_all;
+ rtlpriv->stats.rssi_calculate_cnt++;
+
+ if (rtlpriv->stats.ui_rssi.total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
+ rtlpriv->stats.ui_rssi.total_num = PHY_RSSI_SLID_WIN_MAX;
+ last_rssi = rtlpriv->stats.ui_rssi.elements[
+ rtlpriv->stats.ui_rssi.index];
+ rtlpriv->stats.ui_rssi.total_val -= last_rssi;
+ }
+ rtlpriv->stats.ui_rssi.total_val += pstatus->signalstrength;
+ rtlpriv->stats.ui_rssi.elements[rtlpriv->stats.ui_rssi.index++] =
+ pstatus->signalstrength;
+ if (rtlpriv->stats.ui_rssi.index >= PHY_RSSI_SLID_WIN_MAX)
+ rtlpriv->stats.ui_rssi.index = 0;
+ tmpval = rtlpriv->stats.ui_rssi.total_val /
+ rtlpriv->stats.ui_rssi.total_num;
+ rtlpriv->stats.signal_strength = rtl_translate_todbm(hw,
+ (u8) tmpval);
+ pstatus->rssi = rtlpriv->stats.signal_strength;
+
+ if (pstatus->is_cck)
+ return;
+
+ for (rfpath = RF90_PATH_A; rfpath < rtlphy->num_total_rfpath;
+ rfpath++) {
+ if (rtlpriv->stats.rx_rssi_percentage[rfpath] == 0) {
+ rtlpriv->stats.rx_rssi_percentage[rfpath] =
+ pstatus->rx_mimo_signalstrength[rfpath];
+
+ }
+ if (pstatus->rx_mimo_signalstrength[rfpath] >
+ rtlpriv->stats.rx_rssi_percentage[rfpath]) {
+ rtlpriv->stats.rx_rssi_percentage[rfpath] =
+ ((rtlpriv->stats.rx_rssi_percentage[rfpath] *
+ (RX_SMOOTH_FACTOR - 1)) +
+ (pstatus->rx_mimo_signalstrength[rfpath])) /
+ (RX_SMOOTH_FACTOR);
+ rtlpriv->stats.rx_rssi_percentage[rfpath] =
+ rtlpriv->stats.rx_rssi_percentage[rfpath] + 1;
+ } else {
+ rtlpriv->stats.rx_rssi_percentage[rfpath] =
+ ((rtlpriv->stats.rx_rssi_percentage[rfpath] *
+ (RX_SMOOTH_FACTOR - 1)) +
+ (pstatus->rx_mimo_signalstrength[rfpath])) /
+ (RX_SMOOTH_FACTOR);
+ }
+ rtlpriv->stats.rx_snr_db[rfpath] = pstatus->rx_snr[rfpath];
+ rtlpriv->stats.rx_evm_dbm[rfpath] =
+ pstatus->rx_mimo_evm_dbm[rfpath];
+ rtlpriv->stats.rx_cfo_short[rfpath] =
+ pstatus->cfo_short[rfpath];
+ rtlpriv->stats.rx_cfo_tail[rfpath] = pstatus->cfo_tail[rfpath];
+ }
+}
+
+static void rtl_update_rxsignalstatistics(struct ieee80211_hw *hw,
+ struct rtl_stats *pstatus)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ int weighting = 0;
+
+ if (rtlpriv->stats.recv_signal_power == 0)
+ rtlpriv->stats.recv_signal_power = pstatus->recvsignalpower;
+ if (pstatus->recvsignalpower > rtlpriv->stats.recv_signal_power)
+ weighting = 5;
+ else if (pstatus->recvsignalpower < rtlpriv->stats.recv_signal_power)
+ weighting = (-5);
+ rtlpriv->stats.recv_signal_power = (rtlpriv->stats.recv_signal_power *
+ 5 + pstatus->recvsignalpower + weighting) / 6;
+}
+
+static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_sta_info *drv_priv = NULL;
+ struct ieee80211_sta *sta = NULL;
+ long undec_sm_pwdb;
+
+ rcu_read_lock();
+ if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
+ sta = rtl_find_sta(hw, pstatus->psaddr);
+
+ /* adhoc or ap mode */
+ if (sta) {
+ drv_priv = (struct rtl_sta_info *) sta->drv_priv;
+ undec_sm_pwdb = drv_priv->rssi_stat.undec_sm_pwdb;
+ } else {
+ undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
+ }
+
+ if (undec_sm_pwdb < 0)
+ undec_sm_pwdb = pstatus->rx_pwdb_all;
+ if (pstatus->rx_pwdb_all > (u32) undec_sm_pwdb) {
+ undec_sm_pwdb = (((undec_sm_pwdb) *
+ (RX_SMOOTH_FACTOR - 1)) +
+ (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
+ undec_sm_pwdb = undec_sm_pwdb + 1;
+ } else {
+ undec_sm_pwdb = (((undec_sm_pwdb) *
+ (RX_SMOOTH_FACTOR - 1)) +
+ (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
+ }
+
+ if (sta) {
+ drv_priv->rssi_stat.undec_sm_pwdb = undec_sm_pwdb;
+ } else {
+ rtlpriv->dm.undec_sm_pwdb = undec_sm_pwdb;
+ }
+ rcu_read_unlock();
+
+ rtl_update_rxsignalstatistics(hw, pstatus);
+}
+
+static void rtl_process_ui_link_quality(struct ieee80211_hw *hw,
+ struct rtl_stats *pstatus)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ u32 last_evm, n_stream, tmpval;
+
+ if (pstatus->signalquality == 0)
+ return;
+
+ if (rtlpriv->stats.ui_link_quality.total_num++ >=
+ PHY_LINKQUALITY_SLID_WIN_MAX) {
+ rtlpriv->stats.ui_link_quality.total_num =
+ PHY_LINKQUALITY_SLID_WIN_MAX;
+ last_evm = rtlpriv->stats.ui_link_quality.elements[
+ rtlpriv->stats.ui_link_quality.index];
+ rtlpriv->stats.ui_link_quality.total_val -= last_evm;
+ }
+ rtlpriv->stats.ui_link_quality.total_val += pstatus->signalquality;
+ rtlpriv->stats.ui_link_quality.elements[
+ rtlpriv->stats.ui_link_quality.index++] =
+ pstatus->signalquality;
+ if (rtlpriv->stats.ui_link_quality.index >=
+ PHY_LINKQUALITY_SLID_WIN_MAX)
+ rtlpriv->stats.ui_link_quality.index = 0;
+ tmpval = rtlpriv->stats.ui_link_quality.total_val /
+ rtlpriv->stats.ui_link_quality.total_num;
+ rtlpriv->stats.signal_quality = tmpval;
+ rtlpriv->stats.last_sigstrength_inpercent = tmpval;
+ for (n_stream = 0; n_stream < 2; n_stream++) {
+ if (pstatus->rx_mimo_sig_qual[n_stream] != -1) {
+ if (rtlpriv->stats.rx_evm_percentage[n_stream] == 0) {
+ rtlpriv->stats.rx_evm_percentage[n_stream] =
+ pstatus->rx_mimo_sig_qual[n_stream];
+ }
+ rtlpriv->stats.rx_evm_percentage[n_stream] =
+ ((rtlpriv->stats.rx_evm_percentage[n_stream]
+ * (RX_SMOOTH_FACTOR - 1)) +
+ (pstatus->rx_mimo_sig_qual[n_stream] * 1)) /
+ (RX_SMOOTH_FACTOR);
+ }
+ }
+}
+
+void rtl_process_phyinfo(struct ieee80211_hw *hw, u8 *buffer,
+ struct rtl_stats *pstatus)
+{
+
+ if (!pstatus->packet_matchbssid)
+ return;
+
+ rtl_process_ui_rssi(hw, pstatus);
+ rtl_process_pwdb(hw, pstatus);
+ rtl_process_ui_link_quality(hw, pstatus);
+}
+EXPORT_SYMBOL(rtl_process_phyinfo);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-29 01:16:51 +0300