package/mac80211/patches/522-ath9k_per_chain_signal_strength.patch

   1 --- a/include/net/mac80211.h
   2 +++ b/include/net/mac80211.h
   3 @@ -729,6 +729,9 @@ 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 rates are use (RX_FLAG_HT)
  13 @@ -749,6 +752,8 @@ 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  };
  21
  22 --- a/net/mac80211/sta_info.h
  23 +++ b/net/mac80211/sta_info.h
  24 @@ -325,6 +325,11 @@ struct sta_info {
  25         unsigned long rx_dropped;
  26         int last_signal;
  27         struct ewma avg_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[NUM_RX_DATA_QUEUES + 1];
  35
  36 --- a/net/mac80211/rx.c
  37 +++ b/net/mac80211/rx.c
  38 @@ -1271,6 +1271,7 @@ 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 @@ -1315,6 +1316,19 @@ 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 @@ -254,6 +254,8 @@ 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 @@ -549,6 +549,8 @@ struct station_parameters {
  80   * @STATION_INFO_STA_FLAGS: @sta_flags filled
  81   * @STATION_INFO_BEACON_LOSS_COUNT: @beacon_loss_count filled
  82   * @STATION_INFO_T_OFFSET: @t_offset 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 @@ -572,6 +574,8 @@ enum station_info_flags {
  89         STATION_INFO_STA_FLAGS          = 1<<18,
  90         STATION_INFO_BEACON_LOSS_COUNT  = 1<<19,
  91         STATION_INFO_T_OFFSET           = 1<<20,
  92 +       STATION_INFO_CHAIN_SIGNAL       = 1<<21,
  93 +       STATION_INFO_CHAIN_SIGNAL_AVG   = 1<<22,
  94  };
  95
  96  /**
  97 @@ -655,6 +659,9 @@ 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 @@ -687,6 +694,11 @@ 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 @@ -955,6 +955,7 @@ 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 @@ -980,6 +981,20 @@ 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 --- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
 168 +++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
 169 @@ -458,12 +458,12 @@ int ath9k_hw_process_rxdesc_edma(struct
 170
 171         /* XXX: Keycache */
 172         rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
 173 -       rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
 174 -       rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
 175 -       rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
 176 -       rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
 177 -       rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
 178 -       rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);
 179 +       rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_RxRSSIAnt00);
 180 +       rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_RxRSSIAnt01);
 181 +       rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_RxRSSIAnt02);
 182 +       rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_RxRSSIAnt10);
 183 +       rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_RxRSSIAnt11);
 184 +       rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_RxRSSIAnt12);
 185
 186         if (rxsp->status11 & AR_RxKeyIdxValid)
 187                 rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
 188 --- a/drivers/net/wireless/ath/ath9k/mac.c
 189 +++ b/drivers/net/wireless/ath/ath9k/mac.c
 190 @@ -553,25 +553,25 @@ int ath9k_hw_rxprocdesc(struct ath_hw *a
 191
 192         if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
 193                 rs->rs_rssi = ATH9K_RSSI_BAD;
 194 -               rs->rs_rssi_ctl0 = ATH9K_RSSI_BAD;
 195 -               rs->rs_rssi_ctl1 = ATH9K_RSSI_BAD;
 196 -               rs->rs_rssi_ctl2 = ATH9K_RSSI_BAD;
 197 -               rs->rs_rssi_ext0 = ATH9K_RSSI_BAD;
 198 -               rs->rs_rssi_ext1 = ATH9K_RSSI_BAD;
 199 -               rs->rs_rssi_ext2 = ATH9K_RSSI_BAD;
 200 +               rs->rs_rssi_ctl[0] = ATH9K_RSSI_BAD;
 201 +               rs->rs_rssi_ctl[1] = ATH9K_RSSI_BAD;
 202 +               rs->rs_rssi_ctl[2] = ATH9K_RSSI_BAD;
 203 +               rs->rs_rssi_ext[0] = ATH9K_RSSI_BAD;
 204 +               rs->rs_rssi_ext[1] = ATH9K_RSSI_BAD;
 205 +               rs->rs_rssi_ext[2] = ATH9K_RSSI_BAD;
 206         } else {
 207                 rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
 208 -               rs->rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
 209 +               rs->rs_rssi_ctl[0] = MS(ads.ds_rxstatus0,
 210                                                 AR_RxRSSIAnt00);
 211 -               rs->rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
 212 +               rs->rs_rssi_ctl[1] = MS(ads.ds_rxstatus0,
 213                                                 AR_RxRSSIAnt01);
 214 -               rs->rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
 215 +               rs->rs_rssi_ctl[2] = MS(ads.ds_rxstatus0,
 216                                                 AR_RxRSSIAnt02);
 217 -               rs->rs_rssi_ext0 = MS(ads.ds_rxstatus4,
 218 +               rs->rs_rssi_ext[0] = MS(ads.ds_rxstatus4,
 219                                                 AR_RxRSSIAnt10);
 220 -               rs->rs_rssi_ext1 = MS(ads.ds_rxstatus4,
 221 +               rs->rs_rssi_ext[1] = MS(ads.ds_rxstatus4,
 222                                                 AR_RxRSSIAnt11);
 223 -               rs->rs_rssi_ext2 = MS(ads.ds_rxstatus4,
 224 +               rs->rs_rssi_ext[2] = MS(ads.ds_rxstatus4,
 225                                                 AR_RxRSSIAnt12);
 226         }
 227         if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
 228 --- a/drivers/net/wireless/ath/ath9k/debug.c
 229 +++ b/drivers/net/wireless/ath/ath9k/debug.c
 230 @@ -997,12 +997,12 @@ void ath_debug_stat_rx(struct ath_softc
 231  #ifdef CONFIG_ATH9K_MAC_DEBUG
 232         spin_lock(&sc->debug.samp_lock);
 233         RX_SAMP_DBG(jiffies) = jiffies;
 234 -       RX_SAMP_DBG(rssi_ctl0) = rs->rs_rssi_ctl0;
 235 -       RX_SAMP_DBG(rssi_ctl1) = rs->rs_rssi_ctl1;
 236 -       RX_SAMP_DBG(rssi_ctl2) = rs->rs_rssi_ctl2;
 237 -       RX_SAMP_DBG(rssi_ext0) = rs->rs_rssi_ext0;
 238 -       RX_SAMP_DBG(rssi_ext1) = rs->rs_rssi_ext1;
 239 -       RX_SAMP_DBG(rssi_ext2) = rs->rs_rssi_ext2;
 240 +       RX_SAMP_DBG(rssi_ctl0) = rs->rs_rssi_ctl[0];
 241 +       RX_SAMP_DBG(rssi_ctl1) = rs->rs_rssi_ctl[1];
 242 +       RX_SAMP_DBG(rssi_ctl2) = rs->rs_rssi_ctl[2];
 243 +       RX_SAMP_DBG(rssi_ext0) = rs->rs_rssi_ext[0];
 244 +       RX_SAMP_DBG(rssi_ext1) = rs->rs_rssi_ext[1];
 245 +       RX_SAMP_DBG(rssi_ext2) = rs->rs_rssi_ext[2];
 246         RX_SAMP_DBG(antenna) = rs->rs_antenna;
 247         RX_SAMP_DBG(rssi) = rs->rs_rssi;
 248         RX_SAMP_DBG(rate) = rs->rs_rate;
 249 --- a/include/linux/nl80211.h
 250 +++ b/include/linux/nl80211.h
 251 @@ -1760,6 +1760,8 @@ enum nl80211_sta_bss_param {
 252   * @NL80211_STA_INFO_STA_FLAGS: Contains a struct nl80211_sta_flag_update.
 253   * @NL80211_STA_INFO_BEACON_LOSS: count of times beacon loss was detected (u32)
 254   * @NL80211_STA_INFO_T_OFFSET: timing offset with respect to this STA (s64)
 255 + * @NL80211_STA_INFO_CHAIN_SIGNAL: per-chain signal strength of last PPDU
 256 + * @NL80211_STA_INFO_CHAIN_SIGNAL_AVG: per-chain signal strength average
 257   * @__NL80211_STA_INFO_AFTER_LAST: internal
 258   * @NL80211_STA_INFO_MAX: highest possible station info attribute
 259   */
 260 @@ -1784,6 +1786,8 @@ enum nl80211_sta_info {
 261         NL80211_STA_INFO_STA_FLAGS,
 262         NL80211_STA_INFO_BEACON_LOSS,
 263         NL80211_STA_INFO_T_OFFSET,
 264 +       NL80211_STA_INFO_CHAIN_SIGNAL,
 265 +       NL80211_STA_INFO_CHAIN_SIGNAL_AVG,
 266
 267         /* keep last */
 268         __NL80211_STA_INFO_AFTER_LAST,
 269 --- a/net/wireless/nl80211.c
 270 +++ b/net/wireless/nl80211.c
 271 @@ -2769,6 +2769,32 @@ nla_put_failure:
 272         return false;
 273  }
 274
 275 +static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
 276 +                              int id)
 277 +{
 278 +       void *attr;
 279 +       int i = 0;
 280 +
 281 +       if (!mask)
 282 +               return true;
 283 +
 284 +       attr = nla_nest_start(msg, id);
 285 +       if (!attr)
 286 +               return false;
 287 +
 288 +       for (i = 0; i < 4; i++) {
 289 +               if (!(mask & BIT(i)))
 290 +                       continue;
 291 +
 292 +               if (nla_put_u8(msg, i, signal[i]))
 293 +                       return false;
 294 +       }
 295 +
 296 +       nla_nest_end(msg, attr);
 297 +
 298 +       return true;
 299 +}
 300 +
 301  static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
 302                                 int flags,
 303                                 struct cfg80211_registered_device *rdev,
 304 @@ -2830,6 +2856,18 @@ static int nl80211_send_station(struct s
 305         default:
 306                 break;
 307         }
 308 +       if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
 309 +               if (!nl80211_put_signal(msg, sinfo->chains,
 310 +                                       sinfo->chain_signal,
 311 +                                       NL80211_STA_INFO_CHAIN_SIGNAL))
 312 +                       goto nla_put_failure;
 313 +       }
 314 +       if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
 315 +               if (!nl80211_put_signal(msg, sinfo->chains,
 316 +                                       sinfo->chain_signal_avg,
 317 +                                       NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
 318 +                       goto nla_put_failure;
 319 +       }
 320         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
 321                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
 322                                           NL80211_STA_INFO_TX_BITRATE))
 323 --- a/net/mac80211/cfg.c
 324 +++ b/net/mac80211/cfg.c
 325 @@ -367,6 +367,7 @@ static void sta_set_sinfo(struct sta_inf
 326         struct ieee80211_sub_if_data *sdata = sta->sdata;
 327         struct ieee80211_local *local = sdata->local;
 328         struct timespec uptime;
 329 +       int i;
 330
 331         sinfo->generation = sdata->local->sta_generation;
 332
 333 @@ -406,6 +407,17 @@ static void sta_set_sinfo(struct sta_inf
 334                         sinfo->signal = (s8)sta->last_signal;
 335                 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
 336         }
 337 +       if (sta->chains) {
 338 +               sinfo->filled |= STATION_INFO_CHAIN_SIGNAL |
 339 +                                STATION_INFO_CHAIN_SIGNAL_AVG;
 340 +
 341 +               sinfo->chains = sta->chains;
 342 +               for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
 343 +                       sinfo->chain_signal[i] = sta->chain_signal_last[i];
 344 +                       sinfo->chain_signal_avg[i] =
 345 +                               (s8) -ewma_read(&sta->chain_signal_avg[i]);
 346 +               }
 347 +       }
 348
 349         sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
 350
 351 --- a/drivers/net/wireless/ath/ath9k/dfs.c
 352 +++ b/drivers/net/wireless/ath/ath9k/dfs.c
 353 @@ -164,8 +164,8 @@ void ath9k_dfs_process_phyerr(struct ath
 354                 return;
 355         }
 356
 357 -       ard.rssi = rs->rs_rssi_ctl0;
 358 -       ard.ext_rssi = rs->rs_rssi_ext0;
 359 +       ard.rssi = rs->rs_rssi_ctl[0];
 360 +       ard.ext_rssi = rs->rs_rssi_ext[0];
 361
 362         /*
 363          * hardware stores this as 8 bit signed value.
 364 --- a/drivers/net/wireless/ath/ath9k/antenna.c
 365 +++ b/drivers/net/wireless/ath/ath9k/antenna.c
 366 @@ -529,14 +529,14 @@ void ath_ant_comb_scan(struct ath_softc
 367         struct ath_ant_comb *antcomb = &sc->ant_comb;
 368         int alt_ratio = 0, alt_rssi_avg = 0, main_rssi_avg = 0, curr_alt_set;
 369         int curr_main_set;
 370 -       int main_rssi = rs->rs_rssi_ctl0;
 371 -       int alt_rssi = rs->rs_rssi_ctl1;
 372 +       int main_rssi = rs->rs_rssi_ctl[0];
 373 +       int alt_rssi = rs->rs_rssi_ctl[1];
 374         int rx_ant_conf,  main_ant_conf;
 375         bool short_scan = false;
 376
 377 -       rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) &
 378 +       rx_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_CURRENT_SHIFT) &
 379                        ATH_ANT_RX_MASK;
 380 -       main_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_MAIN_SHIFT) &
 381 +       main_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_MAIN_SHIFT) &
 382                          ATH_ANT_RX_MASK;
 383
 384         /* Record packet only when both main_rssi and  alt_rssi is positive */