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 - 2014 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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  21  * along with this program; if not, write to the Free Software
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  23  * USA
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  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  43  *    notice, this list of conditions and the following disclaimer.
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  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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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
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  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 int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
  75                           struct iwl_device_cmd *cmd)
  76 {
  77         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  78
  79         memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
  80         mvm->ampdu_ref++;
  81
  82 #ifdef CONFIG_IWLWIFI_DEBUGFS
  83         if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
  84                 spin_lock(&mvm->drv_stats_lock);
  85                 mvm->drv_rx_stats.ampdu_count++;
  86                 spin_unlock(&mvm->drv_stats_lock);
  87         }
  88 #endif
  89
  90         return 0;
  91 }
  92
  93 /*
  94  * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
  95  *
  96  * Adds the rxb to a new skb and give it to mac80211
  97  */
  98 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
  99                                             struct sk_buff *skb,
 100                                             struct ieee80211_hdr *hdr, u16 len,
 101                                             u32 ampdu_status, u8 crypt_len,
 102                                             struct iwl_rx_cmd_buffer *rxb)
 103 {
 104         unsigned int hdrlen, fraglen;
 105
 106         /* If frame is small enough to fit in skb->head, pull it completely.
 107          * If not, only pull ieee80211_hdr (including crypto if present) so
 108          * that splice() or TCP coalesce are more efficient.
 109          */
 110         hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr) + crypt_len;
 111
 112         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 113         fraglen = len - hdrlen;
 114
 115         if (fraglen) {
 116                 int offset = (void *)hdr + hdrlen -
 117                              rxb_addr(rxb) + rxb_offset(rxb);
 118
 119                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 120                                 fraglen, rxb->truesize);
 121         }
 122
 123         ieee80211_rx(mvm->hw, skb);
 124 }
 125
 126 /*
 127  * iwl_mvm_get_signal_strength - use new rx PHY INFO API
 128  * values are reported by the fw as positive values - need to negate
 129  * to obtain their dBM.  Account for missing antennas by replacing 0
 130  * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
 131  */
 132 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 133                                         struct iwl_rx_phy_info *phy_info,
 134                                         struct ieee80211_rx_status *rx_status)
 135 {
 136         int energy_a, energy_b, energy_c, max_energy;
 137         u32 val;
 138
 139         val =
 140             le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
 141         energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
 142                                                 IWL_RX_INFO_ENERGY_ANT_A_POS;
 143         energy_a = energy_a ? -energy_a : S8_MIN;
 144         energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
 145                                                 IWL_RX_INFO_ENERGY_ANT_B_POS;
 146         energy_b = energy_b ? -energy_b : S8_MIN;
 147         energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
 148                                                 IWL_RX_INFO_ENERGY_ANT_C_POS;
 149         energy_c = energy_c ? -energy_c : S8_MIN;
 150         max_energy = max(energy_a, energy_b);
 151         max_energy = max(max_energy, energy_c);
 152
 153         IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
 154                         energy_a, energy_b, energy_c, max_energy);
 155
 156         rx_status->signal = max_energy;
 157         rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
 158                                 RX_RES_PHY_FLAGS_ANTENNA)
 159                                         >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 160         rx_status->chain_signal[0] = energy_a;
 161         rx_status->chain_signal[1] = energy_b;
 162         rx_status->chain_signal[2] = energy_c;
 163 }
 164
 165 /*
 166  * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
 167  * @mvm: the mvm object
 168  * @hdr: 80211 header
 169  * @stats: status in mac80211's format
 170  * @rx_pkt_status: status coming from fw
 171  *
 172  * returns non 0 value if the packet should be dropped
 173  */
 174 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
 175                                         struct ieee80211_hdr *hdr,
 176                                         struct ieee80211_rx_status *stats,
 177                                         u32 rx_pkt_status,
 178                                         u8 *crypt_len)
 179 {
 180         if (!ieee80211_has_protected(hdr->frame_control) ||
 181             (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 182                              RX_MPDU_RES_STATUS_SEC_NO_ENC)
 183                 return 0;
 184
 185         /* packet was encrypted with unknown alg */
 186         if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 187                                         RX_MPDU_RES_STATUS_SEC_ENC_ERR)
 188                 return 0;
 189
 190         switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
 191         case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
 192                 /* alg is CCM: check MIC only */
 193                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 194                         return -1;
 195
 196                 stats->flag |= RX_FLAG_DECRYPTED;
 197                 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n");
 198                 *crypt_len = IEEE80211_CCMP_HDR_LEN;
 199                 return 0;
 200
 201         case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
 202                 /* Don't drop the frame and decrypt it in SW */
 203                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
 204                         return 0;
 205                 *crypt_len = IEEE80211_TKIP_IV_LEN;
 206                 /* fall through if TTAK OK */
 207
 208         case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
 209                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
 210                         return -1;
 211
 212                 stats->flag |= RX_FLAG_DECRYPTED;
 213                 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 214                                 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
 215                         *crypt_len = IEEE80211_WEP_IV_LEN;
 216                 return 0;
 217
 218         case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
 219                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 220                         return -1;
 221                 stats->flag |= RX_FLAG_DECRYPTED;
 222                 return 0;
 223
 224         default:
 225                 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
 226         }
 227
 228         return 0;
 229 }
 230
 231 /*
 232  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
 233  *
 234  * Handles the actual data of the Rx packet from the fw
 235  */
 236 int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 237                        struct iwl_device_cmd *cmd)
 238 {
 239         struct ieee80211_hdr *hdr;
 240         struct ieee80211_rx_status *rx_status;
 241         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 242         struct iwl_rx_phy_info *phy_info;
 243         struct iwl_rx_mpdu_res_start *rx_res;
 244         struct ieee80211_sta *sta;
 245         struct sk_buff *skb;
 246         u32 len;
 247         u32 ampdu_status;
 248         u32 rate_n_flags;
 249         u32 rx_pkt_status;
 250         u8 crypt_len = 0;
 251
 252         phy_info = &mvm->last_phy_info;
 253         rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
 254         hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
 255         len = le16_to_cpu(rx_res->byte_count);
 256         rx_pkt_status = le32_to_cpup((__le32 *)
 257                 (pkt->data + sizeof(*rx_res) + len));
 258
 259         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 260          * ieee80211_hdr pulled.
 261          */
 262         skb = alloc_skb(128, GFP_ATOMIC);
 263         if (!skb) {
 264                 IWL_ERR(mvm, "alloc_skb failed\n");
 265                 return 0;
 266         }
 267
 268         rx_status = IEEE80211_SKB_RXCB(skb);
 269
 270         /*
 271          * drop the packet if it has failed being decrypted by HW
 272          */
 273         if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
 274                                          &crypt_len)) {
 275                 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
 276                                rx_pkt_status);
 277                 kfree_skb(skb);
 278                 return 0;
 279         }
 280
 281         if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
 282                 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
 283                                phy_info->cfg_phy_cnt);
 284                 kfree_skb(skb);
 285                 return 0;
 286         }
 287
 288         /*
 289          * Keep packets with CRC errors (and with overrun) for monitor mode
 290          * (otherwise the firmware discards them) but mark them as bad.
 291          */
 292         if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
 293             !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
 294                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
 295                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 296         }
 297
 298         /* This will be used in several places later */
 299         rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
 300
 301         /* rx_status carries information about the packet to mac80211 */
 302         rx_status->mactime = le64_to_cpu(phy_info->timestamp);
 303         rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
 304         rx_status->band =
 305                 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
 306                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 307         rx_status->freq =
 308                 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
 309                                                rx_status->band);
 310         /*
 311          * TSF as indicated by the fw is at INA time, but mac80211 expects the
 312          * TSF at the beginning of the MPDU.
 313          */
 314         /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
 315
 316         iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
 317
 318         IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
 319                               (unsigned long long)rx_status->mactime);
 320
 321         rcu_read_lock();
 322         /*
 323          * We have tx blocked stations (with CS bit). If we heard frames from
 324          * a blocked station on a new channel we can TX to it again.
 325          */
 326         if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
 327                 sta = ieee80211_find_sta(
 328                         rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
 329                 if (sta)
 330                         iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
 331         }
 332
 333         /* This is fine since we don't support multiple AP interfaces */
 334         sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
 335         if (sta) {
 336                 struct iwl_mvm_sta *mvmsta;
 337                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
 338                 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
 339         }
 340
 341         rcu_read_unlock();
 342
 343         /* set the preamble flag if appropriate */
 344         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
 345                 rx_status->flag |= RX_FLAG_SHORTPRE;
 346
 347         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
 348                 /*
 349                  * We know which subframes of an A-MPDU belong
 350                  * together since we get a single PHY response
 351                  * from the firmware for all of them
 352                  */
 353                 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
 354                 rx_status->ampdu_reference = mvm->ampdu_ref;
 355         }
 356
 357         /* Set up the HT phy flags */
 358         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
 359         case RATE_MCS_CHAN_WIDTH_20:
 360                 break;
 361         case RATE_MCS_CHAN_WIDTH_40:
 362                 rx_status->flag |= RX_FLAG_40MHZ;
 363                 break;
 364         case RATE_MCS_CHAN_WIDTH_80:
 365                 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
 366                 break;
 367         case RATE_MCS_CHAN_WIDTH_160:
 368                 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
 369                 break;
 370         }
 371         if (rate_n_flags & RATE_MCS_SGI_MSK)
 372                 rx_status->flag |= RX_FLAG_SHORT_GI;
 373         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
 374                 rx_status->flag |= RX_FLAG_HT_GF;
 375         if (rate_n_flags & RATE_MCS_LDPC_MSK)
 376                 rx_status->flag |= RX_FLAG_LDPC;
 377         if (rate_n_flags & RATE_MCS_HT_MSK) {
 378                 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
 379                                 RATE_MCS_STBC_POS;
 380                 rx_status->flag |= RX_FLAG_HT;
 381                 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
 382                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 383         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
 384                 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
 385                                 RATE_MCS_STBC_POS;
 386                 rx_status->vht_nss =
 387                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
 388                                                 RATE_VHT_MCS_NSS_POS) + 1;
 389                 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
 390                 rx_status->flag |= RX_FLAG_VHT;
 391                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 392                 if (rate_n_flags & RATE_MCS_BF_MSK)
 393                         rx_status->vht_flag |= RX_VHT_FLAG_BF;
 394         } else {
 395                 rx_status->rate_idx =
 396                         iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
 397                                                             rx_status->band);
 398         }
 399
 400 #ifdef CONFIG_IWLWIFI_DEBUGFS
 401         iwl_mvm_update_frame_stats(mvm, &mvm->drv_rx_stats, rate_n_flags,
 402                                    rx_status->flag & RX_FLAG_AMPDU_DETAILS);
 403 #endif
 404         iwl_mvm_pass_packet_to_mac80211(mvm, skb, hdr, len, ampdu_status,
 405                                         crypt_len, rxb);
 406         return 0;
 407 }
 408
 409 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
 410                                          struct iwl_notif_statistics *stats)
 411 {
 412         /*
 413          * NOTE FW aggregates the statistics - BUT the statistics are cleared
 414          * when the driver issues REPLY_STATISTICS_CMD 0x9c with CLEAR_STATS
 415          * bit set.
 416          */
 417         lockdep_assert_held(&mvm->mutex);
 418         memcpy(&mvm->rx_stats, &stats->rx, sizeof(struct mvm_statistics_rx));
 419 }
 420
 421 struct iwl_mvm_stat_data {
 422         struct iwl_notif_statistics *stats;
 423         struct iwl_mvm *mvm;
 424 };
 425
 426 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
 427                                   struct ieee80211_vif *vif)
 428 {
 429         struct iwl_mvm_stat_data *data = _data;
 430         struct iwl_notif_statistics *stats = data->stats;
 431         struct iwl_mvm *mvm = data->mvm;
 432         int sig = -stats->general.beacon_filter_average_energy;
 433         int last_event;
 434         int thold = vif->bss_conf.cqm_rssi_thold;
 435         int hyst = vif->bss_conf.cqm_rssi_hyst;
 436         u16 id = le32_to_cpu(stats->rx.general.mac_id);
 437         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 438
 439         if (mvmvif->id != id)
 440                 return;
 441
 442         if (vif->type != NL80211_IFTYPE_STATION)
 443                 return;
 444
 445         mvmvif->bf_data.ave_beacon_signal = sig;
 446
 447         /* BT Coex */
 448         if (mvmvif->bf_data.bt_coex_min_thold !=
 449             mvmvif->bf_data.bt_coex_max_thold) {
 450                 last_event = mvmvif->bf_data.last_bt_coex_event;
 451                 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
 452                     (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
 453                      last_event == 0)) {
 454                         mvmvif->bf_data.last_bt_coex_event = sig;
 455                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
 456                                      sig);
 457                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
 458                 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
 459                            (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
 460                             last_event == 0)) {
 461                         mvmvif->bf_data.last_bt_coex_event = sig;
 462                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
 463                                      sig);
 464                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
 465                 }
 466         }
 467
 468         if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
 469                 return;
 470
 471         /* CQM Notification */
 472         last_event = mvmvif->bf_data.last_cqm_event;
 473         if (thold && sig < thold && (last_event == 0 ||
 474                                      sig < last_event - hyst)) {
 475                 mvmvif->bf_data.last_cqm_event = sig;
 476                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
 477                              sig);
 478                 ieee80211_cqm_rssi_notify(
 479                         vif,
 480                         NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 481                         GFP_KERNEL);
 482         } else if (sig > thold &&
 483                    (last_event == 0 || sig > last_event + hyst)) {
 484                 mvmvif->bf_data.last_cqm_event = sig;
 485                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
 486                              sig);
 487                 ieee80211_cqm_rssi_notify(
 488                         vif,
 489                         NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 490                         GFP_KERNEL);
 491         }
 492 }
 493
 494 /*
 495  * iwl_mvm_rx_statistics - STATISTICS_NOTIFICATION handler
 496  *
 497  * TODO: This handler is implemented partially.
 498  */
 499 int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
 500                           struct iwl_rx_cmd_buffer *rxb,
 501                           struct iwl_device_cmd *cmd)
 502 {
 503         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 504         struct iwl_notif_statistics *stats = (void *)&pkt->data;
 505         struct mvm_statistics_general_common *common = &stats->general.common;
 506         struct iwl_mvm_stat_data data = {
 507                 .stats = stats,
 508                 .mvm = mvm,
 509         };
 510
 511         iwl_mvm_tt_temp_changed(mvm, le32_to_cpu(common->temperature));
 512
 513         iwl_mvm_update_rx_statistics(mvm, stats);
 514
 515         ieee80211_iterate_active_interfaces(mvm->hw,
 516                                             IEEE80211_IFACE_ITER_NORMAL,
 517                                             iwl_mvm_stat_iterator,
 518                                             &data);
 519         return 0;
 520 }