package/mac80211/patches/550-ath9k_per_chain_signal_strength.patch

   1 --- a/include/net/mac80211.h
   2 +++ b/include/net/mac80211.h
   3 @@ -687,6 +687,9 @@ enum mac80211_rx_flags {
   4   * @mactime: value in microseconds of the 64-bit Time Synchronization Function
   5   *     (TSF) timer when the first data symbol (MPDU) arrived at the hardware.
   6   * @band: the active band when this frame was received
   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   * @freq: frequency the radio was tuned to when receiving this frame, in MHz
  11   * @signal: signal strength when receiving this frame, either in dBm, in dB or
  12   *     unspecified depending on the hardware capabilities flags
  13 @@ -700,6 +703,10 @@ enum mac80211_rx_flags {
  14  struct ieee80211_rx_status {
  15         u64 mactime;
  16         enum ieee80211_band band;
  17 +
  18 +       u8 chains;
  19 +       s8 chain_signal[4];
  20 +
  21         int freq;
  22         int signal;
  23         int antenna;
  24 --- a/net/mac80211/sta_info.h
  25 +++ b/net/mac80211/sta_info.h
  26 @@ -313,6 +313,11 @@ struct sta_info {
  27         unsigned long rx_dropped;
  28         int last_signal;
  29         struct ewma avg_signal;
  30 +
  31 +       u8 chains;
  32 +       s8 chain_signal_last[4];
  33 +       struct ewma chain_signal_avg[4];
  34 +
  35         /* Plus 1 for non-QoS frames */
  36         __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1];
  37
  38 --- a/net/mac80211/rx.c
  39 +++ b/net/mac80211/rx.c
  40 @@ -1271,6 +1271,7 @@ ieee80211_rx_h_sta_process(struct ieee80
  41         struct sk_buff *skb = rx->skb;
  42         struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
  43         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  44 +       int i;
  45
  46         if (!sta)
  47                 return RX_CONTINUE;
  48 @@ -1315,6 +1316,19 @@ ieee80211_rx_h_sta_process(struct ieee80
  49                 ewma_add(&sta->avg_signal, -status->signal);
  50         }
  51
  52 +       if (status->chains) {
  53 +               sta->chains = status->chains;
  54 +               for (i = 0; i < 4; i++) {
  55 +                       int signal = status->chain_signal[i];
  56 +
  57 +                       if (!(status->chains & BIT(i)))
  58 +                               continue;
  59 +
  60 +                       sta->chain_signal_last[i] = signal;
  61 +                       ewma_add(&sta->chain_signal_avg[i], -signal);
  62 +               }
  63 +       }
  64 +
  65         /*
  66          * Change STA power saving mode only at the end of a frame
  67          * exchange sequence.
  68 --- a/net/mac80211/sta_info.c
  69 +++ b/net/mac80211/sta_info.c
  70 @@ -256,6 +256,8 @@ struct sta_info *sta_info_alloc(struct i
  71         do_posix_clock_monotonic_gettime(&uptime);
  72         sta->last_connected = uptime.tv_sec;
  73         ewma_init(&sta->avg_signal, 1024, 8);
  74 +       for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
  75 +               ewma_init(&sta->chain_signal_avg[i], 1024, 8);
  76
  77         if (sta_prepare_rate_control(local, sta, gfp)) {
  78                 kfree(sta);
  79 --- a/include/net/cfg80211.h
  80 +++ b/include/net/cfg80211.h
  81 @@ -518,6 +518,8 @@ struct station_parameters {
  82   * @STATION_INFO_ASSOC_REQ_IES: @assoc_req_ies filled
  83   * @STATION_INFO_STA_FLAGS: @sta_flags filled
  84   * @STATION_INFO_BEACON_LOSS_COUNT: @beacon_loss_count filled
  85 + * @STATION_INFO_CHAIN_SIGNAL: @chain_signal filled
  86 + * @STATION_INFO_CHAIN_SIGNAL_AVG: @chain_signal_avg filled
  87   */
  88  enum station_info_flags {
  89         STATION_INFO_INACTIVE_TIME      = 1<<0,
  90 @@ -539,7 +541,9 @@ enum station_info_flags {
  91         STATION_INFO_CONNECTED_TIME     = 1<<16,
  92         STATION_INFO_ASSOC_REQ_IES      = 1<<17,
  93         STATION_INFO_STA_FLAGS          = 1<<18,
  94 -       STATION_INFO_BEACON_LOSS_COUNT  = 1<<19
  95 +       STATION_INFO_BEACON_LOSS_COUNT  = 1<<19,
  96 +       STATION_INFO_CHAIN_SIGNAL       = 1<<20,
  97 +       STATION_INFO_CHAIN_SIGNAL_AVG   = 1<<21,
  98  };
  99
 100  /**
 101 @@ -619,6 +623,9 @@ struct sta_bss_parameters {
 102   * @plink_state: mesh peer link state
 103   * @signal: signal strength of last received packet in dBm
 104   * @signal_avg: signal strength average in dBm
 105 + * @chains: bitmask for filled values in @chain_signal, @chain_signal_avg
 106 + * @chain_signal: per-chain signal strength of last received packet in dBm
 107 + * @chain_signal_avg: per-chain signal strength average in dBm
 108   * @txrate: current unicast bitrate from this station
 109   * @rxrate: current unicast bitrate to this station
 110   * @rx_packets: packets received from this station
 111 @@ -650,6 +657,11 @@ struct station_info {
 112         u8 plink_state;
 113         s8 signal;
 114         s8 signal_avg;
 115 +
 116 +       u8 chains;
 117 +       s8 chain_signal[4];
 118 +       s8 chain_signal_avg[4];
 119 +
 120         struct rate_info txrate;
 121         struct rate_info rxrate;
 122         u32 rx_packets;
 123 --- a/drivers/net/wireless/ath/ath9k/mac.h
 124 +++ b/drivers/net/wireless/ath/ath9k/mac.h
 125 @@ -133,12 +133,8 @@ struct ath_rx_status {
 126         u8 rs_rate;
 127         u8 rs_antenna;
 128         u8 rs_more;
 129 -       int8_t rs_rssi_ctl0;
 130 -       int8_t rs_rssi_ctl1;
 131 -       int8_t rs_rssi_ctl2;
 132 -       int8_t rs_rssi_ext0;
 133 -       int8_t rs_rssi_ext1;
 134 -       int8_t rs_rssi_ext2;
 135 +       int8_t rs_rssi_ctl[3];
 136 +       int8_t rs_rssi_ext[3];
 137         u8 rs_isaggr;
 138         u8 rs_moreaggr;
 139         u8 rs_num_delims;
 140 --- a/drivers/net/wireless/ath/ath9k/recv.c
 141 +++ b/drivers/net/wireless/ath/ath9k/recv.c
 142 @@ -986,6 +986,7 @@ static int ath9k_rx_skb_preprocess(struc
 143                                    bool *decrypt_error)
 144  {
 145         struct ath_hw *ah = common->ah;
 146 +       int i, j;
 147
 148         /*
 149          * everything but the rate is checked here, the rate check is done
 150 @@ -1011,6 +1012,20 @@ static int ath9k_rx_skb_preprocess(struc
 151         if (rx_stats->rs_moreaggr)
 152                 rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
 153
 154 +       for (i = 0, j = 0; i < ARRAY_SIZE(rx_stats->rs_rssi_ctl); i++) {
 155 +               s8 rssi;
 156 +
 157 +               if (!(ah->rxchainmask & BIT(i)))
 158 +                       continue;
 159 +
 160 +               rssi = rx_stats->rs_rssi_ctl[i];
 161 +               if (rssi != ATH9K_RSSI_BAD) {
 162 +                   rx_status->chains |= BIT(j);
 163 +                   rx_status->chain_signal[j] = ah->noise + rssi;
 164 +               }
 165 +               j++;
 166 +       }
 167 +
 168         return 0;
 169  }
 170
 171 @@ -1541,14 +1556,14 @@ static void ath_ant_comb_scan(struct ath
 172         struct ath_ant_comb *antcomb = &sc->ant_comb;
 173         int alt_ratio = 0, alt_rssi_avg = 0, main_rssi_avg = 0, curr_alt_set;
 174         int curr_main_set;
 175 -       int main_rssi = rs->rs_rssi_ctl0;
 176 -       int alt_rssi = rs->rs_rssi_ctl1;
 177 +       int main_rssi = rs->rs_rssi_ctl[0];
 178 +       int alt_rssi = rs->rs_rssi_ctl[1];
 179         int rx_ant_conf,  main_ant_conf;
 180         bool short_scan = false;
 181
 182 -       rx_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_CURRENT_SHIFT) &
 183 +       rx_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_CURRENT_SHIFT) &
 184                        ATH_ANT_RX_MASK;
 185 -       main_ant_conf = (rs->rs_rssi_ctl2 >> ATH_ANT_RX_MAIN_SHIFT) &
 186 +       main_ant_conf = (rs->rs_rssi_ctl[2] >> ATH_ANT_RX_MAIN_SHIFT) &
 187                          ATH_ANT_RX_MASK;
 188
 189         /* Record packet only when both main_rssi and  alt_rssi is positive */
 190 --- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
 191 +++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
 192 @@ -453,12 +453,12 @@ int ath9k_hw_process_rxdesc_edma(struct
 193
 194         /* XXX: Keycache */
 195         rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
 196 -       rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
 197 -       rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
 198 -       rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
 199 -       rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
 200 -       rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
 201 -       rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);
 202 +       rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_RxRSSIAnt00);
 203 +       rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_RxRSSIAnt01);
 204 +       rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_RxRSSIAnt02);
 205 +       rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_RxRSSIAnt10);
 206 +       rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_RxRSSIAnt11);
 207 +       rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_RxRSSIAnt12);
 208
 209         if (rxsp->status11 & AR_RxKeyIdxValid)
 210                 rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
 211 --- a/drivers/net/wireless/ath/ath9k/mac.c
 212 +++ b/drivers/net/wireless/ath/ath9k/mac.c
 213 @@ -556,25 +556,25 @@ int ath9k_hw_rxprocdesc(struct ath_hw *a
 214
 215         if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
 216                 rs->rs_rssi = ATH9K_RSSI_BAD;
 217 -               rs->rs_rssi_ctl0 = ATH9K_RSSI_BAD;
 218 -               rs->rs_rssi_ctl1 = ATH9K_RSSI_BAD;
 219 -               rs->rs_rssi_ctl2 = ATH9K_RSSI_BAD;
 220 -               rs->rs_rssi_ext0 = ATH9K_RSSI_BAD;
 221 -               rs->rs_rssi_ext1 = ATH9K_RSSI_BAD;
 222 -               rs->rs_rssi_ext2 = ATH9K_RSSI_BAD;
 223 +               rs->rs_rssi_ctl[0] = ATH9K_RSSI_BAD;
 224 +               rs->rs_rssi_ctl[1] = ATH9K_RSSI_BAD;
 225 +               rs->rs_rssi_ctl[2] = ATH9K_RSSI_BAD;
 226 +               rs->rs_rssi_ext[0] = ATH9K_RSSI_BAD;
 227 +               rs->rs_rssi_ext[1] = ATH9K_RSSI_BAD;
 228 +               rs->rs_rssi_ext[2] = ATH9K_RSSI_BAD;
 229         } else {
 230                 rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
 231 -               rs->rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
 232 +               rs->rs_rssi_ctl[0] = MS(ads.ds_rxstatus0,
 233                                                 AR_RxRSSIAnt00);
 234 -               rs->rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
 235 +               rs->rs_rssi_ctl[1] = MS(ads.ds_rxstatus0,
 236                                                 AR_RxRSSIAnt01);
 237 -               rs->rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
 238 +               rs->rs_rssi_ctl[2] = MS(ads.ds_rxstatus0,
 239                                                 AR_RxRSSIAnt02);
 240 -               rs->rs_rssi_ext0 = MS(ads.ds_rxstatus4,
 241 +               rs->rs_rssi_ext[0] = MS(ads.ds_rxstatus4,
 242                                                 AR_RxRSSIAnt10);
 243 -               rs->rs_rssi_ext1 = MS(ads.ds_rxstatus4,
 244 +               rs->rs_rssi_ext[1] = MS(ads.ds_rxstatus4,
 245                                                 AR_RxRSSIAnt11);
 246 -               rs->rs_rssi_ext2 = MS(ads.ds_rxstatus4,
 247 +               rs->rs_rssi_ext[2] = MS(ads.ds_rxstatus4,
 248                                                 AR_RxRSSIAnt12);
 249         }
 250         if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
 251 --- a/drivers/net/wireless/ath/ath9k/debug.c
 252 +++ b/drivers/net/wireless/ath/ath9k/debug.c
 253 @@ -993,12 +993,12 @@ void ath_debug_stat_rx(struct ath_softc
 254  #ifdef CONFIG_ATH9K_MAC_DEBUG
 255         spin_lock(&sc->debug.samp_lock);
 256         RX_SAMP_DBG(jiffies) = jiffies;
 257 -       RX_SAMP_DBG(rssi_ctl0) = rs->rs_rssi_ctl0;
 258 -       RX_SAMP_DBG(rssi_ctl1) = rs->rs_rssi_ctl1;
 259 -       RX_SAMP_DBG(rssi_ctl2) = rs->rs_rssi_ctl2;
 260 -       RX_SAMP_DBG(rssi_ext0) = rs->rs_rssi_ext0;
 261 -       RX_SAMP_DBG(rssi_ext1) = rs->rs_rssi_ext1;
 262 -       RX_SAMP_DBG(rssi_ext2) = rs->rs_rssi_ext2;
 263 +       RX_SAMP_DBG(rssi_ctl0) = rs->rs_rssi_ctl[0];
 264 +       RX_SAMP_DBG(rssi_ctl1) = rs->rs_rssi_ctl[1];
 265 +       RX_SAMP_DBG(rssi_ctl2) = rs->rs_rssi_ctl[2];
 266 +       RX_SAMP_DBG(rssi_ext0) = rs->rs_rssi_ext[0];
 267 +       RX_SAMP_DBG(rssi_ext1) = rs->rs_rssi_ext[1];
 268 +       RX_SAMP_DBG(rssi_ext2) = rs->rs_rssi_ext[2];
 269         RX_SAMP_DBG(antenna) = rs->rs_antenna;
 270         RX_SAMP_DBG(rssi) = rs->rs_rssi;
 271         RX_SAMP_DBG(rate) = rs->rs_rate;
 272 --- a/include/linux/nl80211.h
 273 +++ b/include/linux/nl80211.h
 274 @@ -1661,6 +1661,8 @@ enum nl80211_sta_bss_param {
 275   * @NL80211_STA_INFO_CONNECTED_TIME: time since the station is last connected
 276   * @NL80211_STA_INFO_STA_FLAGS: Contains a struct nl80211_sta_flag_update.
 277   * @NL80211_STA_INFO_BEACON_LOSS: count of times beacon loss was detected (u32)
 278 + * @NL80211_STA_INFO_CHAIN_SIGNAL: per-chain signal strength of last PPDU
 279 + * @NL80211_STA_INFO_CHAIN_SIGNAL_AVG: per-chain signal strength average
 280   * @__NL80211_STA_INFO_AFTER_LAST: internal
 281   * @NL80211_STA_INFO_MAX: highest possible station info attribute
 282   */
 283 @@ -1684,6 +1686,8 @@ enum nl80211_sta_info {
 284         NL80211_STA_INFO_CONNECTED_TIME,
 285         NL80211_STA_INFO_STA_FLAGS,
 286         NL80211_STA_INFO_BEACON_LOSS,
 287 +       NL80211_STA_INFO_CHAIN_SIGNAL,
 288 +       NL80211_STA_INFO_CHAIN_SIGNAL_AVG,
 289
 290         /* keep last */
 291         __NL80211_STA_INFO_AFTER_LAST,
 292 --- a/net/wireless/nl80211.c
 293 +++ b/net/wireless/nl80211.c
 294 @@ -2376,6 +2376,33 @@ nla_put_failure:
 295         return false;
 296  }
 297
 298 +static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
 299 +                              int id)
 300 +{
 301 +       void *attr;
 302 +       int i = 0;
 303 +
 304 +       if (!mask)
 305 +               return true;
 306 +
 307 +       attr = nla_nest_start(msg, id);
 308 +       if (!attr)
 309 +               goto nla_put_failure;
 310 +
 311 +       for (i = 0; i < 4; i++) {
 312 +               if (!(mask & BIT(i)))
 313 +                       continue;
 314 +
 315 +               NLA_PUT_U8(msg, i, signal[i]);
 316 +       }
 317 +
 318 +       nla_nest_end(msg, attr);
 319 +
 320 +       return true;
 321 +nla_put_failure:
 322 +       return false;
 323 +}
 324 +
 325  static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
 326                                 int flags, struct net_device *dev,
 327                                 const u8 *mac_addr, struct station_info *sinfo)
 328 @@ -2422,6 +2449,18 @@ static int nl80211_send_station(struct s
 329         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
 330                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
 331                            sinfo->signal_avg);
 332 +       if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
 333 +               if (!nl80211_put_signal(msg, sinfo->chains,
 334 +                                       sinfo->chain_signal,
 335 +                                       NL80211_STA_INFO_CHAIN_SIGNAL))
 336 +                       goto nla_put_failure;
 337 +       }
 338 +       if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
 339 +               if (!nl80211_put_signal(msg, sinfo->chains,
 340 +                                       sinfo->chain_signal_avg,
 341 +                                       NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
 342 +                       goto nla_put_failure;
 343 +       }
 344         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
 345                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
 346                                           NL80211_STA_INFO_TX_BITRATE))
 347 --- a/net/mac80211/cfg.c
 348 +++ b/net/mac80211/cfg.c
 349 @@ -340,6 +340,7 @@ static void sta_set_sinfo(struct sta_inf
 350  {
 351         struct ieee80211_sub_if_data *sdata = sta->sdata;
 352         struct timespec uptime;
 353 +       int i;
 354
 355         sinfo->generation = sdata->local->sta_generation;
 356
 357 @@ -377,6 +378,17 @@ static void sta_set_sinfo(struct sta_inf
 358                 sinfo->signal = (s8)sta->last_signal;
 359                 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
 360         }
 361 +       if (sta->chains) {
 362 +               sinfo->filled |= STATION_INFO_CHAIN_SIGNAL |
 363 +                                STATION_INFO_CHAIN_SIGNAL_AVG;
 364 +
 365 +               sinfo->chains = sta->chains;
 366 +               for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
 367 +                       sinfo->chain_signal[i] = sta->chain_signal_last[i];
 368 +                       sinfo->chain_signal_avg[i] =
 369 +                               (s8) -ewma_read(&sta->chain_signal_avg[i]);
 370 +               }
 371 +       }
 372
 373         sinfo->txrate.flags = 0;
 374         if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)