1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2009-2012 Realtek Corporation.*/
3
4 #include "wifi.h"
5 #include "stats.h"
6 #include <linux/export.h>
7
rtl_query_rxpwrpercentage(s8 antpower)8 u8 rtl_query_rxpwrpercentage(s8 antpower)
9 {
10 if ((antpower <= -100) || (antpower >= 20))
11 return 0;
12 else if (antpower >= 0)
13 return 100;
14 else
15 return 100 + antpower;
16 }
17 EXPORT_SYMBOL(rtl_query_rxpwrpercentage);
18
rtl_evm_db_to_percentage(s8 value)19 u8 rtl_evm_db_to_percentage(s8 value)
20 {
21 s8 ret_val = clamp(-value, 0, 33) * 3;
22
23 if (ret_val == 99)
24 ret_val = 100;
25
26 return ret_val;
27 }
28 EXPORT_SYMBOL(rtl_evm_db_to_percentage);
29
rtl_translate_todbm(struct ieee80211_hw * hw,u8 signal_strength_index)30 static long rtl_translate_todbm(struct ieee80211_hw *hw,
31 u8 signal_strength_index)
32 {
33 long signal_power;
34
35 signal_power = (long)((signal_strength_index + 1) >> 1);
36 signal_power -= 95;
37 return signal_power;
38 }
39
rtl_signal_scale_mapping(struct ieee80211_hw * hw,long currsig)40 long rtl_signal_scale_mapping(struct ieee80211_hw *hw, long currsig)
41 {
42 long retsig;
43
44 if (currsig >= 61 && currsig <= 100)
45 retsig = 90 + ((currsig - 60) / 4);
46 else if (currsig >= 41 && currsig <= 60)
47 retsig = 78 + ((currsig - 40) / 2);
48 else if (currsig >= 31 && currsig <= 40)
49 retsig = 66 + (currsig - 30);
50 else if (currsig >= 21 && currsig <= 30)
51 retsig = 54 + (currsig - 20);
52 else if (currsig >= 5 && currsig <= 20)
53 retsig = 42 + (((currsig - 5) * 2) / 3);
54 else if (currsig == 4)
55 retsig = 36;
56 else if (currsig == 3)
57 retsig = 27;
58 else if (currsig == 2)
59 retsig = 18;
60 else if (currsig == 1)
61 retsig = 9;
62 else
63 retsig = currsig;
64
65 return retsig;
66 }
67 EXPORT_SYMBOL(rtl_signal_scale_mapping);
68
rtl_process_ui_rssi(struct ieee80211_hw * hw,struct rtl_stats * pstatus)69 static void rtl_process_ui_rssi(struct ieee80211_hw *hw,
70 struct rtl_stats *pstatus)
71 {
72 struct rtl_priv *rtlpriv = rtl_priv(hw);
73 struct rtl_phy *rtlphy = &(rtlpriv->phy);
74 u8 rfpath;
75 u32 last_rssi, tmpval;
76
77 if (!pstatus->packet_toself && !pstatus->packet_beacon)
78 return;
79
80 rtlpriv->stats.pwdb_all_cnt += pstatus->rx_pwdb_all;
81 rtlpriv->stats.rssi_calculate_cnt++;
82
83 if (rtlpriv->stats.ui_rssi.total_num++ >= PHY_RSSI_SLID_WIN_MAX) {
84 rtlpriv->stats.ui_rssi.total_num = PHY_RSSI_SLID_WIN_MAX;
85 last_rssi = rtlpriv->stats.ui_rssi.elements[
86 rtlpriv->stats.ui_rssi.index];
87 rtlpriv->stats.ui_rssi.total_val -= last_rssi;
88 }
89 rtlpriv->stats.ui_rssi.total_val += pstatus->signalstrength;
90 rtlpriv->stats.ui_rssi.elements[rtlpriv->stats.ui_rssi.index++] =
91 pstatus->signalstrength;
92 if (rtlpriv->stats.ui_rssi.index >= PHY_RSSI_SLID_WIN_MAX)
93 rtlpriv->stats.ui_rssi.index = 0;
94 tmpval = rtlpriv->stats.ui_rssi.total_val /
95 rtlpriv->stats.ui_rssi.total_num;
96 rtlpriv->stats.signal_strength = rtl_translate_todbm(hw,
97 (u8) tmpval);
98 pstatus->rssi = rtlpriv->stats.signal_strength;
99
100 if (pstatus->is_cck)
101 return;
102
103 for (rfpath = RF90_PATH_A; rfpath < rtlphy->num_total_rfpath;
104 rfpath++) {
105 if (rtlpriv->stats.rx_rssi_percentage[rfpath] == 0) {
106 rtlpriv->stats.rx_rssi_percentage[rfpath] =
107 pstatus->rx_mimo_signalstrength[rfpath];
108
109 }
110 if (pstatus->rx_mimo_signalstrength[rfpath] >
111 rtlpriv->stats.rx_rssi_percentage[rfpath]) {
112 rtlpriv->stats.rx_rssi_percentage[rfpath] =
113 ((rtlpriv->stats.rx_rssi_percentage[rfpath] *
114 (RX_SMOOTH_FACTOR - 1)) +
115 (pstatus->rx_mimo_signalstrength[rfpath])) /
116 (RX_SMOOTH_FACTOR);
117 rtlpriv->stats.rx_rssi_percentage[rfpath] =
118 rtlpriv->stats.rx_rssi_percentage[rfpath] + 1;
119 } else {
120 rtlpriv->stats.rx_rssi_percentage[rfpath] =
121 ((rtlpriv->stats.rx_rssi_percentage[rfpath] *
122 (RX_SMOOTH_FACTOR - 1)) +
123 (pstatus->rx_mimo_signalstrength[rfpath])) /
124 (RX_SMOOTH_FACTOR);
125 }
126 rtlpriv->stats.rx_snr_db[rfpath] = pstatus->rx_snr[rfpath];
127 rtlpriv->stats.rx_evm_dbm[rfpath] =
128 pstatus->rx_mimo_evm_dbm[rfpath];
129 rtlpriv->stats.rx_cfo_short[rfpath] =
130 pstatus->cfo_short[rfpath];
131 rtlpriv->stats.rx_cfo_tail[rfpath] = pstatus->cfo_tail[rfpath];
132 }
133 }
134
rtl_update_rxsignalstatistics(struct ieee80211_hw * hw,struct rtl_stats * pstatus)135 static void rtl_update_rxsignalstatistics(struct ieee80211_hw *hw,
136 struct rtl_stats *pstatus)
137 {
138 struct rtl_priv *rtlpriv = rtl_priv(hw);
139 int weighting = 0;
140
141 if (rtlpriv->stats.recv_signal_power == 0)
142 rtlpriv->stats.recv_signal_power = pstatus->recvsignalpower;
143 if (pstatus->recvsignalpower > rtlpriv->stats.recv_signal_power)
144 weighting = 5;
145 else if (pstatus->recvsignalpower < rtlpriv->stats.recv_signal_power)
146 weighting = (-5);
147 rtlpriv->stats.recv_signal_power = (rtlpriv->stats.recv_signal_power *
148 5 + pstatus->recvsignalpower + weighting) / 6;
149 }
150
rtl_process_pwdb(struct ieee80211_hw * hw,struct rtl_stats * pstatus)151 static void rtl_process_pwdb(struct ieee80211_hw *hw, struct rtl_stats *pstatus)
152 {
153 struct rtl_priv *rtlpriv = rtl_priv(hw);
154 struct rtl_sta_info *drv_priv = NULL;
155 struct ieee80211_sta *sta = NULL;
156 long undec_sm_pwdb;
157
158 rcu_read_lock();
159 if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
160 sta = rtl_find_sta(hw, pstatus->psaddr);
161
162 /* adhoc or ap mode */
163 if (sta) {
164 drv_priv = (struct rtl_sta_info *) sta->drv_priv;
165 undec_sm_pwdb = drv_priv->rssi_stat.undec_sm_pwdb;
166 } else {
167 undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
168 }
169
170 if (undec_sm_pwdb < 0)
171 undec_sm_pwdb = pstatus->rx_pwdb_all;
172 if (pstatus->rx_pwdb_all > (u32) undec_sm_pwdb) {
173 undec_sm_pwdb = (((undec_sm_pwdb) *
174 (RX_SMOOTH_FACTOR - 1)) +
175 (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
176 undec_sm_pwdb = undec_sm_pwdb + 1;
177 } else {
178 undec_sm_pwdb = (((undec_sm_pwdb) *
179 (RX_SMOOTH_FACTOR - 1)) +
180 (pstatus->rx_pwdb_all)) / (RX_SMOOTH_FACTOR);
181 }
182
183 if (sta) {
184 drv_priv->rssi_stat.undec_sm_pwdb = undec_sm_pwdb;
185 } else {
186 rtlpriv->dm.undec_sm_pwdb = undec_sm_pwdb;
187 }
188 rcu_read_unlock();
189
190 rtl_update_rxsignalstatistics(hw, pstatus);
191 }
192
rtl_process_ui_link_quality(struct ieee80211_hw * hw,struct rtl_stats * pstatus)193 static void rtl_process_ui_link_quality(struct ieee80211_hw *hw,
194 struct rtl_stats *pstatus)
195 {
196 struct rtl_priv *rtlpriv = rtl_priv(hw);
197 u32 last_evm, n_stream, tmpval;
198
199 if (pstatus->signalquality == 0)
200 return;
201
202 if (rtlpriv->stats.ui_link_quality.total_num++ >=
203 PHY_LINKQUALITY_SLID_WIN_MAX) {
204 rtlpriv->stats.ui_link_quality.total_num =
205 PHY_LINKQUALITY_SLID_WIN_MAX;
206 last_evm = rtlpriv->stats.ui_link_quality.elements[
207 rtlpriv->stats.ui_link_quality.index];
208 rtlpriv->stats.ui_link_quality.total_val -= last_evm;
209 }
210 rtlpriv->stats.ui_link_quality.total_val += pstatus->signalquality;
211 rtlpriv->stats.ui_link_quality.elements[
212 rtlpriv->stats.ui_link_quality.index++] =
213 pstatus->signalquality;
214 if (rtlpriv->stats.ui_link_quality.index >=
215 PHY_LINKQUALITY_SLID_WIN_MAX)
216 rtlpriv->stats.ui_link_quality.index = 0;
217 tmpval = rtlpriv->stats.ui_link_quality.total_val /
218 rtlpriv->stats.ui_link_quality.total_num;
219 rtlpriv->stats.signal_quality = tmpval;
220 rtlpriv->stats.last_sigstrength_inpercent = tmpval;
221 for (n_stream = 0; n_stream < 2; n_stream++) {
222 if (pstatus->rx_mimo_sig_qual[n_stream] != -1) {
223 if (rtlpriv->stats.rx_evm_percentage[n_stream] == 0) {
224 rtlpriv->stats.rx_evm_percentage[n_stream] =
225 pstatus->rx_mimo_sig_qual[n_stream];
226 }
227 rtlpriv->stats.rx_evm_percentage[n_stream] =
228 ((rtlpriv->stats.rx_evm_percentage[n_stream]
229 * (RX_SMOOTH_FACTOR - 1)) +
230 (pstatus->rx_mimo_sig_qual[n_stream] * 1)) /
231 (RX_SMOOTH_FACTOR);
232 }
233 }
234 }
235
rtl_process_phyinfo(struct ieee80211_hw * hw,u8 * buffer,struct rtl_stats * pstatus)236 void rtl_process_phyinfo(struct ieee80211_hw *hw, u8 *buffer,
237 struct rtl_stats *pstatus)
238 {
239
240 if (!pstatus->packet_matchbssid)
241 return;
242
243 rtl_process_ui_rssi(hw, pstatus);
244 rtl_process_pwdb(hw, pstatus);
245 rtl_process_ui_link_quality(hw, pstatus);
246 }
247 EXPORT_SYMBOL(rtl_process_phyinfo);
248