package/mac80211/patches/522-ath9k_per_chain_signal_strength.patch

   1 --- a/include/net/mac80211.h
   2 +++ b/include/net/mac80211.h
   3 @@ -839,6 +839,9 @@ enum mac80211_rx_flags {
   4   * @signal: signal strength when receiving this frame, either in dBm, in dB or
   5   *     unspecified depending on the hardware capabilities flags
   6   *     @IEEE80211_HW_SIGNAL_*
   7 + * @chains: bitmask of receive chains for which separate signal strength
   8 + *     values were filled.
   9 + * @chain_signal: per-chain signal strength, same format as @signal
  10   * @antenna: antenna used
  11   * @rate_idx: index of data rate into band's supported rates or MCS index if
  12   *     HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT)
  13 @@ -870,6 +873,8 @@ struct ieee80211_rx_status {
  14         u8 band;
  15         u8 antenna;
  16         s8 signal;
  17 +       u8 chains;
  18 +       s8 chain_signal[4];
  19         u8 ampdu_delimiter_crc;
  20         u8 vendor_radiotap_align;
  21         u8 vendor_radiotap_oui[3];
  22 --- a/net/mac80211/sta_info.h
  23 +++ b/net/mac80211/sta_info.h
  24 @@ -342,6 +342,11 @@ struct sta_info {
  25         int last_signal;
  26         struct ewma avg_signal;
  27         int last_ack_signal;
  28 +
  29 +       u8 chains;
  30 +       s8 chain_signal_last[4];
  31 +       struct ewma chain_signal_avg[4];
  32 +
  33         /* Plus 1 for non-QoS frames */
  34         __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
  35
  36 --- a/net/mac80211/rx.c
  37 +++ b/net/mac80211/rx.c
  38 @@ -1383,6 +1383,7 @@ ieee80211_rx_h_sta_process(struct ieee80
  39         struct sk_buff *skb = rx->skb;
  40         struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
  41         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  42 +       int i;
  43
  44         if (!sta)
  45                 return RX_CONTINUE;
  46 @@ -1433,6 +1434,19 @@ ieee80211_rx_h_sta_process(struct ieee80
  47                 ewma_add(&sta->avg_signal, -status->signal);
  48         }
  49
  50 +       if (status->chains) {
  51 +               sta->chains = status->chains;
  52 +               for (i = 0; i < 4; i++) {
  53 +                       int signal = status->chain_signal[i];
  54 +
  55 +                       if (!(status->chains & BIT(i)))
  56 +                               continue;
  57 +
  58 +                       sta->chain_signal_last[i] = signal;
  59 +                       ewma_add(&sta->chain_signal_avg[i], -signal);
  60 +               }
  61 +       }
  62 +
  63         /*
  64          * Change STA power saving mode only at the end of a frame
  65          * exchange sequence.
  66 --- a/net/mac80211/sta_info.c
  67 +++ b/net/mac80211/sta_info.c
  68 @@ -353,6 +353,8 @@ struct sta_info *sta_info_alloc(struct i
  69         do_posix_clock_monotonic_gettime(&uptime);
  70         sta->last_connected = uptime.tv_sec;
  71         ewma_init(&sta->avg_signal, 1024, 8);
  72 +       for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
  73 +               ewma_init(&sta->chain_signal_avg[i], 1024, 8);
  74
  75         if (sta_prepare_rate_control(local, sta, gfp)) {
  76                 kfree(sta);
  77 --- a/include/net/cfg80211.h
  78 +++ b/include/net/cfg80211.h
  79 @@ -721,6 +721,8 @@ struct station_parameters {
  80   * @STATION_INFO_LOCAL_PM: @local_pm filled
  81   * @STATION_INFO_PEER_PM: @peer_pm filled
  82   * @STATION_INFO_NONPEER_PM: @nonpeer_pm filled
  83 + * @STATION_INFO_CHAIN_SIGNAL: @chain_signal filled
  84 + * @STATION_INFO_CHAIN_SIGNAL_AVG: @chain_signal_avg filled
  85   */
  86  enum station_info_flags {
  87         STATION_INFO_INACTIVE_TIME      = 1<<0,
  88 @@ -749,6 +751,8 @@ enum station_info_flags {
  89         STATION_INFO_NONPEER_PM         = 1<<23,
  90         STATION_INFO_RX_BYTES64         = 1<<24,
  91         STATION_INFO_TX_BYTES64         = 1<<25,
  92 +       STATION_INFO_CHAIN_SIGNAL       = 1<<26,
  93 +       STATION_INFO_CHAIN_SIGNAL_AVG   = 1<<27,
  94  };
  95
  96  /**
  97 @@ -842,6 +846,9 @@ struct sta_bss_parameters {
  98   *     For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_.
  99   * @signal_avg: Average signal strength, type depends on the wiphy's signal_type.
 100   *     For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_.
 101 + * @chains: bitmask for filled values in @chain_signal, @chain_signal_avg
 102 + * @chain_signal: per-chain signal strength of last received packet in dBm
 103 + * @chain_signal_avg: per-chain signal strength average in dBm
 104   * @txrate: current unicast bitrate from this station
 105   * @rxrate: current unicast bitrate to this station
 106   * @rx_packets: packets received from this station
 107 @@ -877,6 +884,11 @@ struct station_info {
 108         u8 plink_state;
 109         s8 signal;
 110         s8 signal_avg;
 111 +
 112 +       u8 chains;
 113 +       s8 chain_signal[4];
 114 +       s8 chain_signal_avg[4];
 115 +
 116         struct rate_info txrate;
 117         struct rate_info rxrate;
 118         u32 rx_packets;
 119 --- a/drivers/net/wireless/ath/ath9k/mac.h
 120 +++ b/drivers/net/wireless/ath/ath9k/mac.h
 121 @@ -133,12 +133,8 @@ struct ath_rx_status {
 122         u8 rs_rate;
 123         u8 rs_antenna;
 124         u8 rs_more;
 125 -       int8_t rs_rssi_ctl0;
 126 -       int8_t rs_rssi_ctl1;
 127 -       int8_t rs_rssi_ctl2;
 128 -       int8_t rs_rssi_ext0;
 129 -       int8_t rs_rssi_ext1;
 130 -       int8_t rs_rssi_ext2;
 131 +       int8_t rs_rssi_ctl[3];
 132 +       int8_t rs_rssi_ext[3];
 133         u8 rs_isaggr;
 134         u8 rs_moreaggr;
 135         u8 rs_num_delims;
 136 --- a/drivers/net/wireless/ath/ath9k/recv.c
 137 +++ b/drivers/net/wireless/ath/ath9k/recv.c
 138 @@ -937,6 +937,7 @@ static int ath9k_rx_skb_preprocess(struc
 139                                    bool *decrypt_error)
 140  {
 141         struct ath_hw *ah = common->ah;
 142 +       int i, j;
 143
 144         /*
 145          * everything but the rate is checked here, the rate check is done
 146 @@ -962,6 +963,20 @@ static int ath9k_rx_skb_preprocess(struc
 147         if (rx_stats->rs_moreaggr)
 148                 rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
 149
 150 +       for (i = 0, j = 0; i < ARRAY_SIZE(rx_stats->rs_rssi_ctl); i++) {
 151 +               s8 rssi;
 152 +
 153 +               if (!(ah->rxchainmask & BIT(i)))
 154 +                       continue;
 155 +
 156 +               rssi = rx_stats->rs_rssi_ctl[i];
 157 +               if (rssi != ATH9K_RSSI_BAD) {
 158 +                   rx_status->chains |= BIT(j);
 159 +                   rx_status->chain_signal[j] = ah->noise + rssi;
 160 +               }
 161 +               j++;
 162 +       }
 163 +
 164         return 0;
 165  }
 166
 167 @@ -1070,7 +1085,7 @@ static int ath_process_fft(struct ath_so
 168         fft_sample.tlv.length = __cpu_to_be16(length);
 169
 170         fft_sample.freq = __cpu_to_be16(ah->curchan->chan->center_freq);
 171 -       fft_sample.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl0);
 172 +       fft_sample.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
 173         fft_sample.noise = ah->noise;
 174
 175         switch (len - SPECTRAL_HT20_TOTAL_DATA_LEN) {
 176 --- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
 177 +++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
 178 @@ -475,12 +475,12 @@ int ath9k_hw_process_rxdesc_edma(struct
 179
 180         /* XXX: Keycache */
 181         rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
 182 -       rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
 183 -       rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
 184 -       rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
 185 -       rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
 186 -       rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
 187 -       rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);
 188 +       rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_RxRSSIAnt00);
 189 +       rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_RxRSSIAnt01);
 190 +       rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_RxRSSIAnt02);
 191 +       rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_RxRSSIAnt10);
 192 +       rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_RxRSSIAnt11);
 193 +       rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_RxRSSIAnt12);
 194
 195         if (rxsp->status11 & AR_RxKeyIdxValid)
 196                 rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
 197 --- a/drivers/net/wireless/ath/ath9k/mac.c
 198 +++ b/drivers/net/wireless/ath/ath9k/mac.c
 199 @@ -553,25 +553,25 @@ int ath9k_hw_rxprocdesc(struct ath_hw *a
 200
 201         if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
 202                 rs->rs_rssi = ATH9K_RSSI_BAD;
 203 -               rs->rs_rssi_ctl0 = ATH9K_RSSI_BAD;
 204 -               rs->rs_rssi_ctl1 = ATH9K_RSSI_BAD;
 205 -               rs->rs_rssi_ctl2 = ATH9K_RSSI_BAD;
 206 -               rs->rs_rssi_ext0 = ATH9K_RSSI_BAD;
 207 -               rs->rs_rssi_ext1 = ATH9K_RSSI_BAD;
 208 -               rs->rs_rssi_ext2 = ATH9K_RSSI_BAD;
 209 +               rs->rs_rssi_ctl[0] = ATH9K_RSSI_BAD;
 210 +               rs->rs_rssi_ctl[1] = ATH9K_RSSI_BAD;
 211 +               rs->rs_rssi_ctl[2] = ATH9K_RSSI_BAD;
 212 +               rs->rs_rssi_ext[0] = ATH9K_RSSI_BAD;
 213 +               rs->rs_rssi_ext[1] = ATH9K_RSSI_BAD;
 214 +               rs->rs_rssi_ext[2] = ATH9K_RSSI_BAD;
 215         } else {
 216                 rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
 217 -               rs->rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
 218 +               rs->rs_rssi_ctl[0] = MS(ads.ds_rxstatus0,
 219                                                 AR_RxRSSIAnt00);
 220 -               rs->rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
 221 +               rs->rs_rssi_ctl[1] = MS(ads.ds_rxstatus0,
 222                                                 AR_RxRSSIAnt01);
 223 -               rs->rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
 224 +               rs->rs_rssi_ctl[2] = MS(ads.ds_rxstatus0,
 225                                                 AR_RxRSSIAnt02);
 226 -               rs->rs_rssi_ext0 = MS(ads.ds_rxstatus4,
 227 +               rs->rs_rssi_ext[0] = MS(ads.ds_rxstatus4,
 228                                                 AR_RxRSSIAnt10);
 229 -               rs->rs_rssi_ext1 = MS(ads.ds_rxstatus4,
 230 +               rs->rs_rssi_ext[1] = MS(ads.ds_rxstatus4,
 231                                                 AR_RxRSSIAnt11);
 232 -               rs->rs_rssi_ext2 = MS(ads.ds_rxstatus4,
 233 +               rs->rs_rssi_ext[2] = MS(ads.ds_rxstatus4,
 234                                                 AR_RxRSSIAnt12);
 235         }
 236         if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
 237 --- a/drivers/net/wireless/ath/ath9k/debug.c
 238 +++ b/drivers/net/wireless/ath/ath9k/debug.c
 239 @@ -940,12 +940,12 @@ void ath_debug_stat_rx(struct ath_softc
 240  #ifdef CONFIG_ATH9K_MAC_DEBUG
 241         spin_lock(&sc->debug.samp_lock);
 242         RX_SAMP_DBG(jiffies) = jiffies;
 243 -       RX_SAMP_DBG(rssi_ctl0) = rs->rs_rssi_ctl0;
 244 -       RX_SAMP_DBG(rssi_ctl1) = rs->rs_rssi_ctl1;
 245 -       RX_SAMP_DBG(rssi_ctl2) = rs->rs_rssi_ctl2;
 246 -       RX_SAMP_DBG(rssi_ext0) = rs->rs_rssi_ext0;
 247 -       RX_SAMP_DBG(rssi_ext1) = rs->rs_rssi_ext1;
 248 -       RX_SAMP_DBG(rssi_ext2) = rs->rs_rssi_ext2;
 249 +       RX_SAMP_DBG(rssi_ctl0) = rs->rs_rssi_ctl[0];
 250 +       RX_SAMP_DBG(rssi_ctl1) = rs->rs_rssi_ctl[1];
 251 +       RX_SAMP_DBG(rssi_ctl2) = rs->rs_rssi_ctl[2];
 252 +       RX_SAMP_DBG(rssi_ext0) = rs->rs_rssi_ext[0];
 253 +       RX_SAMP_DBG(rssi_ext1) = rs->rs_rssi_ext[1];
 254 +       RX_SAMP_DBG(rssi_ext2) = rs->rs_rssi_ext[2];
 255         RX_SAMP_DBG(antenna) = rs->rs_antenna;
 256         RX_SAMP_DBG(rssi) = rs->rs_rssi;
 257         RX_SAMP_DBG(rate) = rs->rs_rate;
 258 --- a/include/uapi/linux/nl80211.h
 259 +++ b/include/uapi/linux/nl80211.h
 260 @@ -1918,6 +1918,8 @@ enum nl80211_sta_bss_param {
 261   * @NL80211_STA_INFO_PEER_PM: peer mesh STA link-specific power mode
 262   * @NL80211_STA_INFO_NONPEER_PM: neighbor mesh STA power save mode towards
 263   *     non-peer STA
 264 + * @NL80211_STA_INFO_CHAIN_SIGNAL: per-chain signal strength of last PPDU
 265 + * @NL80211_STA_INFO_CHAIN_SIGNAL_AVG: per-chain signal strength average
 266   * @__NL80211_STA_INFO_AFTER_LAST: internal
 267   * @NL80211_STA_INFO_MAX: highest possible station info attribute
 268   */
 269 @@ -1947,6 +1949,8 @@ enum nl80211_sta_info {
 270         NL80211_STA_INFO_NONPEER_PM,
 271         NL80211_STA_INFO_RX_BYTES64,
 272         NL80211_STA_INFO_TX_BYTES64,
 273 +       NL80211_STA_INFO_CHAIN_SIGNAL,
 274 +       NL80211_STA_INFO_CHAIN_SIGNAL_AVG,
 275
 276         /* keep last */
 277         __NL80211_STA_INFO_AFTER_LAST,
 278 --- a/net/wireless/nl80211.c
 279 +++ b/net/wireless/nl80211.c
 280 @@ -3082,6 +3082,32 @@ static bool nl80211_put_sta_rate(struct
 281         return true;
 282  }
 283
 284 +static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
 285 +                              int id)
 286 +{
 287 +       void *attr;
 288 +       int i = 0;
 289 +
 290 +       if (!mask)
 291 +               return true;
 292 +
 293 +       attr = nla_nest_start(msg, id);
 294 +       if (!attr)
 295 +               return false;
 296 +
 297 +       for (i = 0; i < 4; i++) {
 298 +               if (!(mask & BIT(i)))
 299 +                       continue;
 300 +
 301 +               if (nla_put_u8(msg, i, signal[i]))
 302 +                       return false;
 303 +       }
 304 +
 305 +       nla_nest_end(msg, attr);
 306 +
 307 +       return true;
 308 +}
 309 +
 310  static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
 311                                 int flags,
 312                                 struct cfg80211_registered_device *rdev,
 313 @@ -3153,6 +3179,18 @@ static int nl80211_send_station(struct s
 314         default:
 315                 break;
 316         }
 317 +       if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
 318 +               if (!nl80211_put_signal(msg, sinfo->chains,
 319 +                                       sinfo->chain_signal,
 320 +                                       NL80211_STA_INFO_CHAIN_SIGNAL))
 321 +                       goto nla_put_failure;
 322 +       }
 323 +       if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
 324 +               if (!nl80211_put_signal(msg, sinfo->chains,
 325 +                                       sinfo->chain_signal_avg,
 326 +                                       NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
 327 +                       goto nla_put_failure;
 328 +       }
 329         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
 330                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
 331                                           NL80211_STA_INFO_TX_BITRATE))
 332 --- a/net/mac80211/cfg.c
 333 +++ b/net/mac80211/cfg.c
 334 @@ -445,6 +445,7 @@ static void sta_set_sinfo(struct sta_inf
 335         struct ieee80211_sub_if_data *sdata = sta->sdata;
 336         struct ieee80211_local *local = sdata->local;
 337         struct timespec uptime;
 338 +       int i;
 339
 340         sinfo->generation = sdata->local->sta_generation;
 341
 342 @@ -484,6 +485,17 @@ static void sta_set_sinfo(struct sta_inf
 343                         sinfo->signal = (s8)sta->last_signal;
 344                 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
 345         }
 346 +       if (sta->chains) {
 347 +               sinfo->filled |= STATION_INFO_CHAIN_SIGNAL |
 348 +                                STATION_INFO_CHAIN_SIGNAL_AVG;
 349 +
 350 +               sinfo->chains = sta->chains;
 351 +               for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
 352 +                       sinfo->chain_signal[i] = sta->chain_signal_last[i];
 353 +                       sinfo->chain_signal_avg[i] =
 354 +                               (s8) -ewma_read(&sta->chain_signal_avg[i]);
 355 +               }
 356 +       }
 357
 358         sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
 359         sta_set_rate_info_rx(sta, &sinfo->rxrate);
 360 --- a/drivers/net/wireless/ath/ath9k/dfs.c
 361 +++ b/drivers/net/wireless/ath/ath9k/dfs.c
 362 @@ -164,8 +164,8 @@ void ath9k_dfs_process_phyerr(struct ath
 363                 return;
 364         }
 365
 366 -       ard.rssi = rs->rs_rssi_ctl0;
 367 -       ard.ext_rssi = rs->rs_rssi_ext0;
 368 +       ard.rssi = rs->rs_rssi_ctl[0];
 369 +       ard.ext_rssi = rs->rs_rssi_ext[0];
 370
 371         /*
 372          * hardware stores this as 8 bit signed value.
 373 --- a/drivers/net/wireless/ath/ath9k/antenna.c
 374 +++ b/drivers/net/wireless/ath/ath9k/antenna.c
 375 @@ -546,14 +546,14 @@ void ath_ant_comb_scan(struct ath_softc
 376         struct ath_ant_comb *antcomb = &sc->ant_comb;
 377         int alt_ratio = 0, alt_rssi_avg = 0, main_rssi_avg = 0, curr_alt_set;
 378         int curr_main_set;
 379 -       int main_rssi = rs->rs_rssi_ctl0;
 380 -       int alt_rssi = rs->rs_rssi_ctl1;
 381 +       int main_rssi = rs->rs_rssi_ctl[0];
 382 +       int alt_rssi = rs->rs_rssi_ctl[1];
 383         int rx_ant_conf,  main_ant_conf;
 384         bool short_scan = false;
 385
 386 -       rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) &
 387 +       rx_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_CURRENT_SHIFT) &
 388                        ATH_ANT_RX_MASK;
 389 -       main_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_MAIN_SHIFT) &
 390 +       main_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_MAIN_SHIFT) &
 391                          ATH_ANT_RX_MASK;
 392
 393         /* Record packet only when both main_rssi and  alt_rssi is positive */