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  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  31  *
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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  46  *    the documentation and/or other materials provided with the
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *****************************************************************************/
  64 #include "iwl-trans.h"
  65 #include "mvm.h"
  66 #include "fw-api.h"
  67
  68 /*
  69  * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
  70  *
  71  * Copies the phy information in mvm->last_phy_info, it will be used when the
  72  * actual data will come from the fw in the next packet.
  73  */
  74 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
  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
  81 #ifdef CONFIG_IWLWIFI_DEBUGFS
  82         if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
  83                 spin_lock(&mvm->drv_stats_lock);
  84                 mvm->drv_rx_stats.ampdu_count++;
  85                 spin_unlock(&mvm->drv_stats_lock);
  86         }
  87 #endif
  88 }
  89
  90 /*
  91  * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
  92  *
  93  * Adds the rxb to a new skb and give it to mac80211
  94  */
  95 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
  96                                             struct sk_buff *skb,
  97                                             struct ieee80211_hdr *hdr, u16 len,
  98                                             u32 ampdu_status, u8 crypt_len,
  99                                             struct iwl_rx_cmd_buffer *rxb)
 100 {
 101         unsigned int hdrlen, fraglen;
 102
 103         /* If frame is small enough to fit in skb->head, pull it completely.
 104          * If not, only pull ieee80211_hdr (including crypto if present, and
 105          * an additional 8 bytes for SNAP/ethertype, see below) so that
 106          * splice() or TCP coalesce are more efficient.
 107          *
 108          * Since, in addition, ieee80211_data_to_8023() always pull in at
 109          * least 8 bytes (possibly more for mesh) we can do the same here
 110          * to save the cost of doing it later. That still doesn't pull in
 111          * the actual IP header since the typical case has a SNAP header.
 112          * If the latter changes (there are efforts in the standards group
 113          * to do so) we should revisit this and ieee80211_data_to_8023().
 114          */
 115         hdrlen = (len <= skb_tailroom(skb)) ? len :
 116                                               sizeof(*hdr) + crypt_len + 8;
 117
 118         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 119         fraglen = len - hdrlen;
 120
 121         if (fraglen) {
 122                 int offset = (void *)hdr + hdrlen -
 123                              rxb_addr(rxb) + rxb_offset(rxb);
 124
 125                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 126                                 fraglen, rxb->truesize);
 127         }
 128
 129         ieee80211_rx(mvm->hw, skb);
 130 }
 131
 132 /*
 133  * iwl_mvm_get_signal_strength - use new rx PHY INFO API
 134  * values are reported by the fw as positive values - need to negate
 135  * to obtain their dBM.  Account for missing antennas by replacing 0
 136  * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
 137  */
 138 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 139                                         struct iwl_rx_phy_info *phy_info,
 140                                         struct ieee80211_rx_status *rx_status)
 141 {
 142         int energy_a, energy_b, energy_c, max_energy;
 143         u32 val;
 144
 145         val =
 146             le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
 147         energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
 148                                                 IWL_RX_INFO_ENERGY_ANT_A_POS;
 149         energy_a = energy_a ? -energy_a : S8_MIN;
 150         energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
 151                                                 IWL_RX_INFO_ENERGY_ANT_B_POS;
 152         energy_b = energy_b ? -energy_b : S8_MIN;
 153         energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
 154                                                 IWL_RX_INFO_ENERGY_ANT_C_POS;
 155         energy_c = energy_c ? -energy_c : S8_MIN;
 156         max_energy = max(energy_a, energy_b);
 157         max_energy = max(max_energy, energy_c);
 158
 159         IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
 160                         energy_a, energy_b, energy_c, max_energy);
 161
 162         rx_status->signal = max_energy;
 163         rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
 164                                 RX_RES_PHY_FLAGS_ANTENNA)
 165                                         >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 166         rx_status->chain_signal[0] = energy_a;
 167         rx_status->chain_signal[1] = energy_b;
 168         rx_status->chain_signal[2] = energy_c;
 169 }
 170
 171 /*
 172  * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
 173  * @mvm: the mvm object
 174  * @hdr: 80211 header
 175  * @stats: status in mac80211's format
 176  * @rx_pkt_status: status coming from fw
 177  *
 178  * returns non 0 value if the packet should be dropped
 179  */
 180 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
 181                                         struct ieee80211_hdr *hdr,
 182                                         struct ieee80211_rx_status *stats,
 183                                         u32 rx_pkt_status,
 184                                         u8 *crypt_len)
 185 {
 186         if (!ieee80211_has_protected(hdr->frame_control) ||
 187             (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 188                              RX_MPDU_RES_STATUS_SEC_NO_ENC)
 189                 return 0;
 190
 191         /* packet was encrypted with unknown alg */
 192         if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 193                                         RX_MPDU_RES_STATUS_SEC_ENC_ERR)
 194                 return 0;
 195
 196         switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
 197         case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
 198                 /* alg is CCM: check MIC only */
 199                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 200                         return -1;
 201
 202                 stats->flag |= RX_FLAG_DECRYPTED;
 203                 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n");
 204                 *crypt_len = IEEE80211_CCMP_HDR_LEN;
 205                 return 0;
 206
 207         case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
 208                 /* Don't drop the frame and decrypt it in SW */
 209                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
 210                         return 0;
 211                 *crypt_len = IEEE80211_TKIP_IV_LEN;
 212                 /* fall through if TTAK OK */
 213
 214         case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
 215                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
 216                         return -1;
 217
 218                 stats->flag |= RX_FLAG_DECRYPTED;
 219                 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 220                                 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
 221                         *crypt_len = IEEE80211_WEP_IV_LEN;
 222                 return 0;
 223
 224         case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
 225                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 226                         return -1;
 227                 stats->flag |= RX_FLAG_DECRYPTED;
 228                 return 0;
 229
 230         default:
 231                 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
 232         }
 233
 234         return 0;
 235 }
 236
 237 /*
 238  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
 239  *
 240  * Handles the actual data of the Rx packet from the fw
 241  */
 242 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 243 {
 244         struct ieee80211_hdr *hdr;
 245         struct ieee80211_rx_status *rx_status;
 246         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 247         struct iwl_rx_phy_info *phy_info;
 248         struct iwl_rx_mpdu_res_start *rx_res;
 249         struct ieee80211_sta *sta;
 250         struct sk_buff *skb;
 251         u32 len;
 252         u32 ampdu_status;
 253         u32 rate_n_flags;
 254         u32 rx_pkt_status;
 255         u8 crypt_len = 0;
 256
 257         phy_info = &mvm->last_phy_info;
 258         rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
 259         hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
 260         len = le16_to_cpu(rx_res->byte_count);
 261         rx_pkt_status = le32_to_cpup((__le32 *)
 262                 (pkt->data + sizeof(*rx_res) + len));
 263
 264         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 265          * ieee80211_hdr pulled.
 266          */
 267         skb = alloc_skb(128, GFP_ATOMIC);
 268         if (!skb) {
 269                 IWL_ERR(mvm, "alloc_skb failed\n");
 270                 return;
 271         }
 272
 273         rx_status = IEEE80211_SKB_RXCB(skb);
 274
 275         /*
 276          * drop the packet if it has failed being decrypted by HW
 277          */
 278         if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
 279                                          &crypt_len)) {
 280                 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
 281                                rx_pkt_status);
 282                 kfree_skb(skb);
 283                 return;
 284         }
 285
 286         if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
 287                 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
 288                                phy_info->cfg_phy_cnt);
 289                 kfree_skb(skb);
 290                 return;
 291         }
 292
 293         /*
 294          * Keep packets with CRC errors (and with overrun) for monitor mode
 295          * (otherwise the firmware discards them) but mark them as bad.
 296          */
 297         if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
 298             !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
 299                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
 300                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 301         }
 302
 303         /* This will be used in several places later */
 304         rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
 305
 306         /* rx_status carries information about the packet to mac80211 */
 307         rx_status->mactime = le64_to_cpu(phy_info->timestamp);
 308         rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
 309         rx_status->band =
 310                 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
 311                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 312         rx_status->freq =
 313                 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
 314                                                rx_status->band);
 315         /*
 316          * TSF as indicated by the fw is at INA time, but mac80211 expects the
 317          * TSF at the beginning of the MPDU.
 318          */
 319         /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
 320
 321         iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
 322
 323         IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
 324                               (unsigned long long)rx_status->mactime);
 325
 326         rcu_read_lock();
 327         /*
 328          * We have tx blocked stations (with CS bit). If we heard frames from
 329          * a blocked station on a new channel we can TX to it again.
 330          */
 331         if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
 332                 sta = ieee80211_find_sta(
 333                         rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
 334                 if (sta)
 335                         iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
 336         }
 337
 338         /* This is fine since we don't support multiple AP interfaces */
 339         sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
 340         if (sta) {
 341                 struct iwl_mvm_sta *mvmsta;
 342                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
 343                 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
 344
 345                 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
 346                     ieee80211_is_beacon(hdr->frame_control)) {
 347                         struct iwl_fw_dbg_trigger_tlv *trig;
 348                         struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
 349                         bool trig_check;
 350                         s32 rssi;
 351
 352                         trig = iwl_fw_dbg_get_trigger(mvm->fw,
 353                                                       FW_DBG_TRIGGER_RSSI);
 354                         rssi_trig = (void *)trig->data;
 355                         rssi = le32_to_cpu(rssi_trig->rssi);
 356
 357                         trig_check =
 358                                 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
 359                                                               trig);
 360                         if (trig_check && rx_status->signal < rssi)
 361                                 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
 362                 }
 363         }
 364
 365         rcu_read_unlock();
 366
 367         /* set the preamble flag if appropriate */
 368         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
 369                 rx_status->flag |= RX_FLAG_SHORTPRE;
 370
 371         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
 372                 /*
 373                  * We know which subframes of an A-MPDU belong
 374                  * together since we get a single PHY response
 375                  * from the firmware for all of them
 376                  */
 377                 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
 378                 rx_status->ampdu_reference = mvm->ampdu_ref;
 379         }
 380
 381         /* Set up the HT phy flags */
 382         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
 383         case RATE_MCS_CHAN_WIDTH_20:
 384                 break;
 385         case RATE_MCS_CHAN_WIDTH_40:
 386                 rx_status->flag |= RX_FLAG_40MHZ;
 387                 break;
 388         case RATE_MCS_CHAN_WIDTH_80:
 389                 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
 390                 break;
 391         case RATE_MCS_CHAN_WIDTH_160:
 392                 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
 393                 break;
 394         }
 395         if (rate_n_flags & RATE_MCS_SGI_MSK)
 396                 rx_status->flag |= RX_FLAG_SHORT_GI;
 397         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
 398                 rx_status->flag |= RX_FLAG_HT_GF;
 399         if (rate_n_flags & RATE_MCS_LDPC_MSK)
 400                 rx_status->flag |= RX_FLAG_LDPC;
 401         if (rate_n_flags & RATE_MCS_HT_MSK) {
 402                 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
 403                                 RATE_MCS_STBC_POS;
 404                 rx_status->flag |= RX_FLAG_HT;
 405                 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
 406                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 407         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
 408                 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
 409                                 RATE_MCS_STBC_POS;
 410                 rx_status->vht_nss =
 411                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
 412                                                 RATE_VHT_MCS_NSS_POS) + 1;
 413                 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
 414                 rx_status->flag |= RX_FLAG_VHT;
 415                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 416                 if (rate_n_flags & RATE_MCS_BF_MSK)
 417                         rx_status->vht_flag |= RX_VHT_FLAG_BF;
 418         } else {
 419                 rx_status->rate_idx =
 420                         iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
 421                                                             rx_status->band);
 422         }
 423
 424 #ifdef CONFIG_IWLWIFI_DEBUGFS
 425         iwl_mvm_update_frame_stats(mvm, rate_n_flags,
 426                                    rx_status->flag & RX_FLAG_AMPDU_DETAILS);
 427 #endif
 428         iwl_mvm_pass_packet_to_mac80211(mvm, skb, hdr, len, ampdu_status,
 429                                         crypt_len, rxb);
 430 }
 431
 432 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
 433                                          struct mvm_statistics_rx *rx_stats)
 434 {
 435         lockdep_assert_held(&mvm->mutex);
 436
 437         mvm->rx_stats = *rx_stats;
 438 }
 439
 440 struct iwl_mvm_stat_data {
 441         struct iwl_mvm *mvm;
 442         __le32 mac_id;
 443         __s8 beacon_filter_average_energy;
 444         struct mvm_statistics_general_v8 *general;
 445 };
 446
 447 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
 448                                   struct ieee80211_vif *vif)
 449 {
 450         struct iwl_mvm_stat_data *data = _data;
 451         struct iwl_mvm *mvm = data->mvm;
 452         int sig = -data->beacon_filter_average_energy;
 453         int last_event;
 454         int thold = vif->bss_conf.cqm_rssi_thold;
 455         int hyst = vif->bss_conf.cqm_rssi_hyst;
 456         u16 id = le32_to_cpu(data->mac_id);
 457         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 458
 459         /* This doesn't need the MAC ID check since it's not taking the
 460          * data copied into the "data" struct, but rather the data from
 461          * the notification directly.
 462          */
 463         if (data->general) {
 464                 mvmvif->beacon_stats.num_beacons =
 465                         le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
 466                 mvmvif->beacon_stats.avg_signal =
 467                         -data->general->beacon_average_energy[mvmvif->id];
 468         }
 469
 470         if (mvmvif->id != id)
 471                 return;
 472
 473         if (vif->type != NL80211_IFTYPE_STATION)
 474                 return;
 475
 476         if (sig == 0) {
 477                 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
 478                 return;
 479         }
 480
 481         mvmvif->bf_data.ave_beacon_signal = sig;
 482
 483         /* BT Coex */
 484         if (mvmvif->bf_data.bt_coex_min_thold !=
 485             mvmvif->bf_data.bt_coex_max_thold) {
 486                 last_event = mvmvif->bf_data.last_bt_coex_event;
 487                 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
 488                     (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
 489                      last_event == 0)) {
 490                         mvmvif->bf_data.last_bt_coex_event = sig;
 491                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
 492                                      sig);
 493                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
 494                 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
 495                            (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
 496                             last_event == 0)) {
 497                         mvmvif->bf_data.last_bt_coex_event = sig;
 498                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
 499                                      sig);
 500                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
 501                 }
 502         }
 503
 504         if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
 505                 return;
 506
 507         /* CQM Notification */
 508         last_event = mvmvif->bf_data.last_cqm_event;
 509         if (thold && sig < thold && (last_event == 0 ||
 510                                      sig < last_event - hyst)) {
 511                 mvmvif->bf_data.last_cqm_event = sig;
 512                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
 513                              sig);
 514                 ieee80211_cqm_rssi_notify(
 515                         vif,
 516                         NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 517                         GFP_KERNEL);
 518         } else if (sig > thold &&
 519                    (last_event == 0 || sig > last_event + hyst)) {
 520                 mvmvif->bf_data.last_cqm_event = sig;
 521                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
 522                              sig);
 523                 ieee80211_cqm_rssi_notify(
 524                         vif,
 525                         NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 526                         GFP_KERNEL);
 527         }
 528 }
 529
 530 static inline void
 531 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
 532 {
 533         struct iwl_fw_dbg_trigger_tlv *trig;
 534         struct iwl_fw_dbg_trigger_stats *trig_stats;
 535         u32 trig_offset, trig_thold;
 536
 537         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
 538                 return;
 539
 540         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
 541         trig_stats = (void *)trig->data;
 542
 543         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 544                 return;
 545
 546         trig_offset = le32_to_cpu(trig_stats->stop_offset);
 547         trig_thold = le32_to_cpu(trig_stats->stop_threshold);
 548
 549         if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
 550                 return;
 551
 552         if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
 553                 return;
 554
 555         iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
 556 }
 557
 558 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
 559                                   struct iwl_rx_packet *pkt)
 560 {
 561         size_t v8_len = sizeof(struct iwl_notif_statistics_v8);
 562         size_t v10_len = sizeof(struct iwl_notif_statistics_v10);
 563         struct iwl_mvm_stat_data data = {
 564                 .mvm = mvm,
 565         };
 566         u32 temperature;
 567
 568         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STATS_V10)) {
 569                 struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
 570
 571                 if (iwl_rx_packet_payload_len(pkt) != v10_len)
 572                         goto invalid;
 573
 574                 temperature = le32_to_cpu(stats->general.radio_temperature);
 575                 data.mac_id = stats->rx.general.mac_id;
 576                 data.beacon_filter_average_energy =
 577                         stats->general.beacon_filter_average_energy;
 578
 579                 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
 580
 581                 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
 582                 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
 583                 mvm->radio_stats.on_time_rf =
 584                         le64_to_cpu(stats->general.on_time_rf);
 585                 mvm->radio_stats.on_time_scan =
 586                         le64_to_cpu(stats->general.on_time_scan);
 587
 588                 data.general = &stats->general;
 589         } else {
 590                 struct iwl_notif_statistics_v8 *stats = (void *)&pkt->data;
 591
 592                 if (iwl_rx_packet_payload_len(pkt) != v8_len)
 593                         goto invalid;
 594
 595                 temperature = le32_to_cpu(stats->general.radio_temperature);
 596                 data.mac_id = stats->rx.general.mac_id;
 597                 data.beacon_filter_average_energy =
 598                         stats->general.beacon_filter_average_energy;
 599
 600                 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
 601         }
 602
 603         iwl_mvm_rx_stats_check_trigger(mvm, pkt);
 604
 605         /* Only handle rx statistics temperature changes if async temp
 606          * notifications are not supported
 607          */
 608         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_ASYNC_DTM))
 609                 iwl_mvm_tt_temp_changed(mvm, temperature);
 610
 611         ieee80211_iterate_active_interfaces(mvm->hw,
 612                                             IEEE80211_IFACE_ITER_NORMAL,
 613                                             iwl_mvm_stat_iterator,
 614                                             &data);
 615         return;
 616  invalid:
 617         IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
 618                 iwl_rx_packet_payload_len(pkt));
 619 }
 620
 621 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 622 {
 623         iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
 624 }