drivers/net/wireless/iwlwifi/mvm/rx.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *****************************************************************************/
  62 #include "iwl-trans.h"
  63
  64 #include "mvm.h"
  65 #include "fw-api.h"
  66
  67 /*
  68  * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
  69  *
  70  * Copies the phy information in mvm->last_phy_info, it will be used when the
  71  * actual data will come from the fw in the next packet.
  72  */
  73 int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
  74                           struct iwl_device_cmd *cmd)
  75 {
  76         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  77
  78         memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
  79         mvm->ampdu_ref++;
  80         return 0;
  81 }
  82
  83 /*
  84  * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
  85  *
  86  * Adds the rxb to a new skb and give it to mac80211
  87  */
  88 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
  89                                             struct ieee80211_hdr *hdr, u16 len,
  90                                             u32 ampdu_status,
  91                                             struct iwl_rx_cmd_buffer *rxb,
  92                                             struct ieee80211_rx_status *stats)
  93 {
  94         struct sk_buff *skb;
  95         unsigned int hdrlen, fraglen;
  96
  97         /* Dont use dev_alloc_skb(), we'll have enough headroom once
  98          * ieee80211_hdr pulled.
  99          */
 100         skb = alloc_skb(128, GFP_ATOMIC);
 101         if (!skb) {
 102                 IWL_ERR(mvm, "alloc_skb failed\n");
 103                 return;
 104         }
 105         /* If frame is small enough to fit in skb->head, pull it completely.
 106          * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
 107          * are more efficient.
 108          */
 109         hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
 110
 111         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 112         fraglen = len - hdrlen;
 113
 114         if (fraglen) {
 115                 int offset = (void *)hdr + hdrlen -
 116                              rxb_addr(rxb) + rxb_offset(rxb);
 117
 118                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 119                                 fraglen, rxb->truesize);
 120         }
 121
 122         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 123
 124         ieee80211_rx_ni(mvm->hw, skb);
 125 }
 126
 127 static void iwl_mvm_calc_rssi(struct iwl_mvm *mvm,
 128                               struct iwl_rx_phy_info *phy_info,
 129                               struct ieee80211_rx_status *rx_status)
 130 {
 131         int rssi_a, rssi_b, rssi_a_dbm, rssi_b_dbm, max_rssi_dbm;
 132         int rssi_all_band_a, rssi_all_band_b;
 133         u32 agc_a, agc_b, max_agc;
 134         u32 val;
 135
 136         val = le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_AGC_IDX]);
 137         agc_a = (val & IWL_OFDM_AGC_A_MSK) >> IWL_OFDM_AGC_A_POS;
 138         agc_b = (val & IWL_OFDM_AGC_B_MSK) >> IWL_OFDM_AGC_B_POS;
 139         max_agc = max_t(u32, agc_a, agc_b);
 140
 141         val = le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_RSSI_AB_IDX]);
 142         rssi_a = (val & IWL_OFDM_RSSI_INBAND_A_MSK) >> IWL_OFDM_RSSI_A_POS;
 143         rssi_b = (val & IWL_OFDM_RSSI_INBAND_B_MSK) >> IWL_OFDM_RSSI_B_POS;
 144         rssi_all_band_a = (val & IWL_OFDM_RSSI_ALLBAND_A_MSK) >>
 145                                 IWL_OFDM_RSSI_ALLBAND_A_POS;
 146         rssi_all_band_b = (val & IWL_OFDM_RSSI_ALLBAND_B_MSK) >>
 147                                 IWL_OFDM_RSSI_ALLBAND_B_POS;
 148
 149         /*
 150          * dBm = rssi dB - agc dB - constant.
 151          * Higher AGC (higher radio gain) means lower signal.
 152          */
 153         rssi_a_dbm = rssi_a - IWL_RSSI_OFFSET - agc_a;
 154         rssi_b_dbm = rssi_b - IWL_RSSI_OFFSET - agc_b;
 155         max_rssi_dbm = max_t(int, rssi_a_dbm, rssi_b_dbm);
 156
 157         IWL_DEBUG_STATS(mvm, "Rssi In A %d B %d Max %d AGCA %d AGCB %d\n",
 158                         rssi_a_dbm, rssi_b_dbm, max_rssi_dbm, agc_a, agc_b);
 159
 160         rx_status->signal = max_rssi_dbm;
 161         rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
 162                                 RX_RES_PHY_FLAGS_ANTENNA)
 163                                         >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 164         rx_status->chain_signal[0] = rssi_a_dbm;
 165         rx_status->chain_signal[1] = rssi_b_dbm;
 166 }
 167
 168 /*
 169  * iwl_mvm_get_signal_strength - use new rx PHY INFO API
 170  * values are reported by the fw as positive values - need to negate
 171  * to obtain their dBM.  Account for missing antennas by replacing 0
 172  * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
 173  */
 174 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 175                                         struct iwl_rx_phy_info *phy_info,
 176                                         struct ieee80211_rx_status *rx_status)
 177 {
 178         int energy_a, energy_b, energy_c, max_energy;
 179         u32 val;
 180
 181         val =
 182             le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
 183         energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
 184                                                 IWL_RX_INFO_ENERGY_ANT_A_POS;
 185         energy_a = energy_a ? -energy_a : -256;
 186         energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
 187                                                 IWL_RX_INFO_ENERGY_ANT_B_POS;
 188         energy_b = energy_b ? -energy_b : -256;
 189         energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
 190                                                 IWL_RX_INFO_ENERGY_ANT_C_POS;
 191         energy_c = energy_c ? -energy_c : -256;
 192         max_energy = max(energy_a, energy_b);
 193         max_energy = max(max_energy, energy_c);
 194
 195         IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
 196                         energy_a, energy_b, energy_c, max_energy);
 197
 198         rx_status->signal = max_energy;
 199         rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
 200                                 RX_RES_PHY_FLAGS_ANTENNA)
 201                                         >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 202         rx_status->chain_signal[0] = energy_a;
 203         rx_status->chain_signal[1] = energy_b;
 204         rx_status->chain_signal[2] = energy_c;
 205 }
 206
 207 /*
 208  * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
 209  * @mvm: the mvm object
 210  * @hdr: 80211 header
 211  * @stats: status in mac80211's format
 212  * @rx_pkt_status: status coming from fw
 213  *
 214  * returns non 0 value if the packet should be dropped
 215  */
 216 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
 217                                         struct ieee80211_hdr *hdr,
 218                                         struct ieee80211_rx_status *stats,
 219                                         u32 rx_pkt_status)
 220 {
 221         if (!ieee80211_has_protected(hdr->frame_control) ||
 222             (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 223                              RX_MPDU_RES_STATUS_SEC_NO_ENC)
 224                 return 0;
 225
 226         /* packet was encrypted with unknown alg */
 227         if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 228                                         RX_MPDU_RES_STATUS_SEC_ENC_ERR)
 229                 return 0;
 230
 231         switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
 232         case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
 233                 /* alg is CCM: check MIC only */
 234                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 235                         return -1;
 236
 237                 stats->flag |= RX_FLAG_DECRYPTED;
 238                 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n");
 239                 return 0;
 240
 241         case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
 242                 /* Don't drop the frame and decrypt it in SW */
 243                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
 244                         return 0;
 245                 /* fall through if TTAK OK */
 246
 247         case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
 248                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
 249                         return -1;
 250
 251                 stats->flag |= RX_FLAG_DECRYPTED;
 252                 return 0;
 253
 254         case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
 255                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 256                         return -1;
 257                 stats->flag |= RX_FLAG_DECRYPTED;
 258                 return 0;
 259
 260         default:
 261                 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
 262         }
 263
 264         return 0;
 265 }
 266
 267 /*
 268  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
 269  *
 270  * Handles the actual data of the Rx packet from the fw
 271  */
 272 int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 273                        struct iwl_device_cmd *cmd)
 274 {
 275         struct ieee80211_hdr *hdr;
 276         struct ieee80211_rx_status rx_status = {};
 277         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 278         struct iwl_rx_phy_info *phy_info;
 279         struct iwl_rx_mpdu_res_start *rx_res;
 280         u32 len;
 281         u32 ampdu_status;
 282         u32 rate_n_flags;
 283         u32 rx_pkt_status;
 284
 285         phy_info = &mvm->last_phy_info;
 286         rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
 287         hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
 288         len = le16_to_cpu(rx_res->byte_count);
 289         rx_pkt_status = le32_to_cpup((__le32 *)
 290                 (pkt->data + sizeof(*rx_res) + len));
 291
 292         memset(&rx_status, 0, sizeof(rx_status));
 293
 294         /*
 295          * drop the packet if it has failed being decrypted by HW
 296          */
 297         if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) {
 298                 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
 299                                rx_pkt_status);
 300                 return 0;
 301         }
 302
 303         if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
 304                 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
 305                                phy_info->cfg_phy_cnt);
 306                 return 0;
 307         }
 308
 309         /*
 310          * Keep packets with CRC errors (and with overrun) for monitor mode
 311          * (otherwise the firmware discards them) but mark them as bad.
 312          */
 313         if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
 314             !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
 315                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
 316                 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 317         }
 318
 319         /* This will be used in several places later */
 320         rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
 321
 322         /* rx_status carries information about the packet to mac80211 */
 323         rx_status.mactime = le64_to_cpu(phy_info->timestamp);
 324         rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp);
 325         rx_status.band =
 326                 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
 327                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 328         rx_status.freq =
 329                 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
 330                                                rx_status.band);
 331         /*
 332          * TSF as indicated by the fw is at INA time, but mac80211 expects the
 333          * TSF at the beginning of the MPDU.
 334          */
 335         /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
 336
 337         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_RX_ENERGY_API)
 338                 iwl_mvm_get_signal_strength(mvm, phy_info, &rx_status);
 339         else
 340                 iwl_mvm_calc_rssi(mvm, phy_info, &rx_status);
 341
 342         IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal,
 343                               (unsigned long long)rx_status.mactime);
 344
 345         /* set the preamble flag if appropriate */
 346         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
 347                 rx_status.flag |= RX_FLAG_SHORTPRE;
 348
 349         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
 350                 /*
 351                  * We know which subframes of an A-MPDU belong
 352                  * together since we get a single PHY response
 353                  * from the firmware for all of them
 354                  */
 355                 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
 356                 rx_status.ampdu_reference = mvm->ampdu_ref;
 357         }
 358
 359         /* Set up the HT phy flags */
 360         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
 361         case RATE_MCS_CHAN_WIDTH_20:
 362                 break;
 363         case RATE_MCS_CHAN_WIDTH_40:
 364                 rx_status.flag |= RX_FLAG_40MHZ;
 365                 break;
 366         case RATE_MCS_CHAN_WIDTH_80:
 367                 rx_status.flag |= RX_FLAG_80MHZ;
 368                 break;
 369         case RATE_MCS_CHAN_WIDTH_160:
 370                 rx_status.flag |= RX_FLAG_160MHZ;
 371                 break;
 372         }
 373         if (rate_n_flags & RATE_MCS_SGI_MSK)
 374                 rx_status.flag |= RX_FLAG_SHORT_GI;
 375         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
 376                 rx_status.flag |= RX_FLAG_HT_GF;
 377         if (rate_n_flags & RATE_MCS_HT_MSK) {
 378                 rx_status.flag |= RX_FLAG_HT;
 379                 rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
 380         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
 381                 rx_status.vht_nss =
 382                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
 383                                                 RATE_VHT_MCS_NSS_POS) + 1;
 384                 rx_status.rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
 385                 rx_status.flag |= RX_FLAG_VHT;
 386         } else {
 387                 rx_status.rate_idx =
 388                         iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
 389                                                             rx_status.band);
 390         }
 391
 392         iwl_mvm_pass_packet_to_mac80211(mvm, hdr, len, ampdu_status,
 393                                         rxb, &rx_status);
 394         return 0;
 395 }
 396
 397 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
 398                                          struct iwl_notif_statistics *stats)
 399 {
 400         /*
 401          * NOTE FW aggregates the statistics - BUT the statistics are cleared
 402          * when the driver issues REPLY_STATISTICS_CMD 0x9c with CLEAR_STATS
 403          * bit set.
 404          */
 405         lockdep_assert_held(&mvm->mutex);
 406         memcpy(&mvm->rx_stats, &stats->rx, sizeof(struct mvm_statistics_rx));
 407 }
 408
 409 struct iwl_mvm_stat_data {
 410         struct iwl_notif_statistics *stats;
 411         struct iwl_mvm *mvm;
 412 };
 413
 414 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
 415                                   struct ieee80211_vif *vif)
 416 {
 417         struct iwl_mvm_stat_data *data = _data;
 418         struct iwl_notif_statistics *stats = data->stats;
 419         struct iwl_mvm *mvm = data->mvm;
 420         int sig = -stats->general.beacon_filter_average_energy;
 421         int last_event;
 422         int thold = vif->bss_conf.cqm_rssi_thold;
 423         int hyst = vif->bss_conf.cqm_rssi_hyst;
 424         u16 id = le32_to_cpu(stats->rx.general.mac_id);
 425         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 426
 427         if (mvmvif->id != id)
 428                 return;
 429
 430         if (vif->type != NL80211_IFTYPE_STATION)
 431                 return;
 432
 433         mvmvif->bf_data.ave_beacon_signal = sig;
 434
 435         /* BT Coex */
 436         if (mvmvif->bf_data.bt_coex_min_thold !=
 437             mvmvif->bf_data.bt_coex_max_thold) {
 438                 last_event = mvmvif->bf_data.last_bt_coex_event;
 439                 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
 440                     (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
 441                      last_event == 0)) {
 442                         mvmvif->bf_data.last_bt_coex_event = sig;
 443                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
 444                                      sig);
 445                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
 446                 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
 447                            (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
 448                             last_event == 0)) {
 449                         mvmvif->bf_data.last_bt_coex_event = sig;
 450                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
 451                                      sig);
 452                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
 453                 }
 454         }
 455
 456         if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
 457                 return;
 458
 459         /* CQM Notification */
 460         last_event = mvmvif->bf_data.last_cqm_event;
 461         if (thold && sig < thold && (last_event == 0 ||
 462                                      sig < last_event - hyst)) {
 463                 mvmvif->bf_data.last_cqm_event = sig;
 464                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
 465                              sig);
 466                 ieee80211_cqm_rssi_notify(
 467                         vif,
 468                         NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 469                         GFP_KERNEL);
 470         } else if (sig > thold &&
 471                    (last_event == 0 || sig > last_event + hyst)) {
 472                 mvmvif->bf_data.last_cqm_event = sig;
 473                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
 474                              sig);
 475                 ieee80211_cqm_rssi_notify(
 476                         vif,
 477                         NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 478                         GFP_KERNEL);
 479         }
 480 }
 481
 482 /*
 483  * iwl_mvm_rx_statistics - STATISTICS_NOTIFICATION handler
 484  *
 485  * TODO: This handler is implemented partially.
 486  */
 487 int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
 488                           struct iwl_rx_cmd_buffer *rxb,
 489                           struct iwl_device_cmd *cmd)
 490 {
 491         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 492         struct iwl_notif_statistics *stats = (void *)&pkt->data;
 493         struct mvm_statistics_general_common *common = &stats->general.common;
 494         struct iwl_mvm_stat_data data = {
 495                 .stats = stats,
 496                 .mvm = mvm,
 497         };
 498
 499         if (mvm->temperature != le32_to_cpu(common->temperature)) {
 500                 mvm->temperature = le32_to_cpu(common->temperature);
 501                 iwl_mvm_tt_handler(mvm);
 502         }
 503         iwl_mvm_update_rx_statistics(mvm, stats);
 504
 505         ieee80211_iterate_active_interfaces(mvm->hw,
 506                                             IEEE80211_IFACE_ITER_NORMAL,
 507                                             iwl_mvm_stat_iterator,
 508                                             &data);
 509         return 0;
 510 }