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
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  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 - 2015 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  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 <linux/skbuff.h>
  65 #include "iwl-trans.h"
  66 #include "mvm.h"
  67 #include "fw-api.h"
  68
  69 /*
  70  * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
  71  *
  72  * Copies the phy information in mvm->last_phy_info, it will be used when the
  73  * actual data will come from the fw in the next packet.
  74  */
  75 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
  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
  91 /*
  92  * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
  93  *
  94  * Adds the rxb to a new skb and give it to mac80211
  95  */
  96 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
  97                                             struct sk_buff *skb,
  98                                             struct ieee80211_hdr *hdr, u16 len,
  99                                             u32 ampdu_status, u8 crypt_len,
 100                                             struct iwl_rx_cmd_buffer *rxb)
 101 {
 102         unsigned int hdrlen, fraglen;
 103
 104         /* If frame is small enough to fit in skb->head, pull it completely.
 105          * If not, only pull ieee80211_hdr (including crypto if present, and
 106          * an additional 8 bytes for SNAP/ethertype, see below) so that
 107          * splice() or TCP coalesce are more efficient.
 108          *
 109          * Since, in addition, ieee80211_data_to_8023() always pull in at
 110          * least 8 bytes (possibly more for mesh) we can do the same here
 111          * to save the cost of doing it later. That still doesn't pull in
 112          * the actual IP header since the typical case has a SNAP header.
 113          * If the latter changes (there are efforts in the standards group
 114          * to do so) we should revisit this and ieee80211_data_to_8023().
 115          */
 116         hdrlen = (len <= skb_tailroom(skb)) ? len :
 117                                               sizeof(*hdr) + crypt_len + 8;
 118
 119         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 120         fraglen = len - hdrlen;
 121
 122         if (fraglen) {
 123                 int offset = (void *)hdr + hdrlen -
 124                              rxb_addr(rxb) + rxb_offset(rxb);
 125
 126                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 127                                 fraglen, rxb->truesize);
 128         }
 129
 130         ieee80211_rx_napi(mvm->hw, skb, mvm->napi);
 131 }
 132
 133 /*
 134  * iwl_mvm_get_signal_strength - use new rx PHY INFO API
 135  * values are reported by the fw as positive values - need to negate
 136  * to obtain their dBM.  Account for missing antennas by replacing 0
 137  * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
 138  */
 139 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 140                                         struct iwl_rx_phy_info *phy_info,
 141                                         struct ieee80211_rx_status *rx_status)
 142 {
 143         int energy_a, energy_b, energy_c, max_energy;
 144         u32 val;
 145
 146         val =
 147             le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
 148         energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
 149                                                 IWL_RX_INFO_ENERGY_ANT_A_POS;
 150         energy_a = energy_a ? -energy_a : S8_MIN;
 151         energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
 152                                                 IWL_RX_INFO_ENERGY_ANT_B_POS;
 153         energy_b = energy_b ? -energy_b : S8_MIN;
 154         energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
 155                                                 IWL_RX_INFO_ENERGY_ANT_C_POS;
 156         energy_c = energy_c ? -energy_c : S8_MIN;
 157         max_energy = max(energy_a, energy_b);
 158         max_energy = max(max_energy, energy_c);
 159
 160         IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
 161                         energy_a, energy_b, energy_c, max_energy);
 162
 163         rx_status->signal = max_energy;
 164         rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
 165                                 RX_RES_PHY_FLAGS_ANTENNA)
 166                                         >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 167         rx_status->chain_signal[0] = energy_a;
 168         rx_status->chain_signal[1] = energy_b;
 169         rx_status->chain_signal[2] = energy_c;
 170 }
 171
 172 /*
 173  * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
 174  * @mvm: the mvm object
 175  * @hdr: 80211 header
 176  * @stats: status in mac80211's format
 177  * @rx_pkt_status: status coming from fw
 178  *
 179  * returns non 0 value if the packet should be dropped
 180  */
 181 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
 182                                         struct ieee80211_hdr *hdr,
 183                                         struct ieee80211_rx_status *stats,
 184                                         u32 rx_pkt_status,
 185                                         u8 *crypt_len)
 186 {
 187         if (!ieee80211_has_protected(hdr->frame_control) ||
 188             (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 189                              RX_MPDU_RES_STATUS_SEC_NO_ENC)
 190                 return 0;
 191
 192         /* packet was encrypted with unknown alg */
 193         if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 194                                         RX_MPDU_RES_STATUS_SEC_ENC_ERR)
 195                 return 0;
 196
 197         switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
 198         case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
 199                 /* alg is CCM: check MIC only */
 200                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 201                         return -1;
 202
 203                 stats->flag |= RX_FLAG_DECRYPTED;
 204                 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n");
 205                 *crypt_len = IEEE80211_CCMP_HDR_LEN;
 206                 return 0;
 207
 208         case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
 209                 /* Don't drop the frame and decrypt it in SW */
 210                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
 211                         return 0;
 212                 *crypt_len = IEEE80211_TKIP_IV_LEN;
 213                 /* fall through if TTAK OK */
 214
 215         case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
 216                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
 217                         return -1;
 218
 219                 stats->flag |= RX_FLAG_DECRYPTED;
 220                 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 221                                 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
 222                         *crypt_len = IEEE80211_WEP_IV_LEN;
 223                 return 0;
 224
 225         case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
 226                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 227                         return -1;
 228                 stats->flag |= RX_FLAG_DECRYPTED;
 229                 return 0;
 230
 231         default:
 232                 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
 233         }
 234
 235         return 0;
 236 }
 237
 238 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
 239                             struct sk_buff *skb,
 240                             u32 status)
 241 {
 242         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 243         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 244
 245         if (mvmvif->features & NETIF_F_RXCSUM &&
 246             status & RX_MPDU_RES_STATUS_CSUM_DONE &&
 247             status & RX_MPDU_RES_STATUS_CSUM_OK)
 248                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 249 }
 250
 251 /*
 252  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
 253  *
 254  * Handles the actual data of the Rx packet from the fw
 255  */
 256 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 257 {
 258         struct ieee80211_hdr *hdr;
 259         struct ieee80211_rx_status *rx_status;
 260         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 261         struct iwl_rx_phy_info *phy_info;
 262         struct iwl_rx_mpdu_res_start *rx_res;
 263         struct ieee80211_sta *sta;
 264         struct sk_buff *skb;
 265         u32 len;
 266         u32 ampdu_status;
 267         u32 rate_n_flags;
 268         u32 rx_pkt_status;
 269         u8 crypt_len = 0;
 270
 271         phy_info = &mvm->last_phy_info;
 272         rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
 273         hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
 274         len = le16_to_cpu(rx_res->byte_count);
 275         rx_pkt_status = le32_to_cpup((__le32 *)
 276                 (pkt->data + sizeof(*rx_res) + len));
 277
 278         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 279          * ieee80211_hdr pulled.
 280          */
 281         skb = alloc_skb(128, GFP_ATOMIC);
 282         if (!skb) {
 283                 IWL_ERR(mvm, "alloc_skb failed\n");
 284                 return;
 285         }
 286
 287         rx_status = IEEE80211_SKB_RXCB(skb);
 288
 289         /*
 290          * drop the packet if it has failed being decrypted by HW
 291          */
 292         if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
 293                                          &crypt_len)) {
 294                 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
 295                                rx_pkt_status);
 296                 kfree_skb(skb);
 297                 return;
 298         }
 299
 300         if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
 301                 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
 302                                phy_info->cfg_phy_cnt);
 303                 kfree_skb(skb);
 304                 return;
 305         }
 306
 307         /*
 308          * Keep packets with CRC errors (and with overrun) for monitor mode
 309          * (otherwise the firmware discards them) but mark them as bad.
 310          */
 311         if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
 312             !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
 313                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
 314                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 315         }
 316
 317         /* This will be used in several places later */
 318         rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
 319
 320         /* rx_status carries information about the packet to mac80211 */
 321         rx_status->mactime = le64_to_cpu(phy_info->timestamp);
 322         rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
 323         rx_status->band =
 324                 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
 325                                 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
 326         rx_status->freq =
 327                 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
 328                                                rx_status->band);
 329         /*
 330          * TSF as indicated by the fw is at INA time, but mac80211 expects the
 331          * TSF at the beginning of the MPDU.
 332          */
 333         /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
 334
 335         iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
 336
 337         IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
 338                               (unsigned long long)rx_status->mactime);
 339
 340         rcu_read_lock();
 341         /*
 342          * We have tx blocked stations (with CS bit). If we heard frames from
 343          * a blocked station on a new channel we can TX to it again.
 344          */
 345         if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
 346                 sta = ieee80211_find_sta(
 347                         rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
 348                 if (sta)
 349                         iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
 350         }
 351
 352         /* This is fine since we don't support multiple AP interfaces */
 353         sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
 354         if (sta) {
 355                 struct iwl_mvm_sta *mvmsta;
 356                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
 357                 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
 358
 359                 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
 360                     ieee80211_is_beacon(hdr->frame_control)) {
 361                         struct iwl_fw_dbg_trigger_tlv *trig;
 362                         struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
 363                         bool trig_check;
 364                         s32 rssi;
 365
 366                         trig = iwl_fw_dbg_get_trigger(mvm->fw,
 367                                                       FW_DBG_TRIGGER_RSSI);
 368                         rssi_trig = (void *)trig->data;
 369                         rssi = le32_to_cpu(rssi_trig->rssi);
 370
 371                         trig_check =
 372                                 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
 373                                                               trig);
 374                         if (trig_check && rx_status->signal < rssi)
 375                                 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
 376                 }
 377         }
 378
 379         if (sta && ieee80211_is_data(hdr->frame_control))
 380                 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
 381
 382         rcu_read_unlock();
 383
 384         /* set the preamble flag if appropriate */
 385         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
 386                 rx_status->flag |= RX_FLAG_SHORTPRE;
 387
 388         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
 389                 /*
 390                  * We know which subframes of an A-MPDU belong
 391                  * together since we get a single PHY response
 392                  * from the firmware for all of them
 393                  */
 394                 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
 395                 rx_status->ampdu_reference = mvm->ampdu_ref;
 396         }
 397
 398         /* Set up the HT phy flags */
 399         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
 400         case RATE_MCS_CHAN_WIDTH_20:
 401                 break;
 402         case RATE_MCS_CHAN_WIDTH_40:
 403                 rx_status->flag |= RX_FLAG_40MHZ;
 404                 break;
 405         case RATE_MCS_CHAN_WIDTH_80:
 406                 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
 407                 break;
 408         case RATE_MCS_CHAN_WIDTH_160:
 409                 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
 410                 break;
 411         }
 412         if (rate_n_flags & RATE_MCS_SGI_MSK)
 413                 rx_status->flag |= RX_FLAG_SHORT_GI;
 414         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
 415                 rx_status->flag |= RX_FLAG_HT_GF;
 416         if (rate_n_flags & RATE_MCS_LDPC_MSK)
 417                 rx_status->flag |= RX_FLAG_LDPC;
 418         if (rate_n_flags & RATE_MCS_HT_MSK) {
 419                 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
 420                                 RATE_MCS_STBC_POS;
 421                 rx_status->flag |= RX_FLAG_HT;
 422                 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
 423                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 424         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
 425                 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
 426                                 RATE_MCS_STBC_POS;
 427                 rx_status->vht_nss =
 428                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
 429                                                 RATE_VHT_MCS_NSS_POS) + 1;
 430                 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
 431                 rx_status->flag |= RX_FLAG_VHT;
 432                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 433                 if (rate_n_flags & RATE_MCS_BF_MSK)
 434                         rx_status->vht_flag |= RX_VHT_FLAG_BF;
 435         } else {
 436                 rx_status->rate_idx =
 437                         iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
 438                                                             rx_status->band);
 439         }
 440
 441 #ifdef CONFIG_IWLWIFI_DEBUGFS
 442         iwl_mvm_update_frame_stats(mvm, rate_n_flags,
 443                                    rx_status->flag & RX_FLAG_AMPDU_DETAILS);
 444 #endif
 445         iwl_mvm_pass_packet_to_mac80211(mvm, skb, hdr, len, ampdu_status,
 446                                         crypt_len, rxb);
 447 }
 448
 449 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
 450                                          struct mvm_statistics_rx *rx_stats)
 451 {
 452         lockdep_assert_held(&mvm->mutex);
 453
 454         mvm->rx_stats = *rx_stats;
 455 }
 456
 457 struct iwl_mvm_stat_data {
 458         struct iwl_mvm *mvm;
 459         __le32 mac_id;
 460         __s8 beacon_filter_average_energy;
 461         struct mvm_statistics_general_v8 *general;
 462 };
 463
 464 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
 465                                   struct ieee80211_vif *vif)
 466 {
 467         struct iwl_mvm_stat_data *data = _data;
 468         struct iwl_mvm *mvm = data->mvm;
 469         int sig = -data->beacon_filter_average_energy;
 470         int last_event;
 471         int thold = vif->bss_conf.cqm_rssi_thold;
 472         int hyst = vif->bss_conf.cqm_rssi_hyst;
 473         u16 id = le32_to_cpu(data->mac_id);
 474         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 475
 476         /* This doesn't need the MAC ID check since it's not taking the
 477          * data copied into the "data" struct, but rather the data from
 478          * the notification directly.
 479          */
 480         if (data->general) {
 481                 mvmvif->beacon_stats.num_beacons =
 482                         le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
 483                 mvmvif->beacon_stats.avg_signal =
 484                         -data->general->beacon_average_energy[mvmvif->id];
 485         }
 486
 487         if (mvmvif->id != id)
 488                 return;
 489
 490         if (vif->type != NL80211_IFTYPE_STATION)
 491                 return;
 492
 493         if (sig == 0) {
 494                 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
 495                 return;
 496         }
 497
 498         mvmvif->bf_data.ave_beacon_signal = sig;
 499
 500         /* BT Coex */
 501         if (mvmvif->bf_data.bt_coex_min_thold !=
 502             mvmvif->bf_data.bt_coex_max_thold) {
 503                 last_event = mvmvif->bf_data.last_bt_coex_event;
 504                 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
 505                     (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
 506                      last_event == 0)) {
 507                         mvmvif->bf_data.last_bt_coex_event = sig;
 508                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
 509                                      sig);
 510                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
 511                 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
 512                            (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
 513                             last_event == 0)) {
 514                         mvmvif->bf_data.last_bt_coex_event = sig;
 515                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
 516                                      sig);
 517                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
 518                 }
 519         }
 520
 521         if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
 522                 return;
 523
 524         /* CQM Notification */
 525         last_event = mvmvif->bf_data.last_cqm_event;
 526         if (thold && sig < thold && (last_event == 0 ||
 527                                      sig < last_event - hyst)) {
 528                 mvmvif->bf_data.last_cqm_event = sig;
 529                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
 530                              sig);
 531                 ieee80211_cqm_rssi_notify(
 532                         vif,
 533                         NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 534                         GFP_KERNEL);
 535         } else if (sig > thold &&
 536                    (last_event == 0 || sig > last_event + hyst)) {
 537                 mvmvif->bf_data.last_cqm_event = sig;
 538                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
 539                              sig);
 540                 ieee80211_cqm_rssi_notify(
 541                         vif,
 542                         NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 543                         GFP_KERNEL);
 544         }
 545 }
 546
 547 static inline void
 548 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
 549 {
 550         struct iwl_fw_dbg_trigger_tlv *trig;
 551         struct iwl_fw_dbg_trigger_stats *trig_stats;
 552         u32 trig_offset, trig_thold;
 553
 554         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
 555                 return;
 556
 557         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
 558         trig_stats = (void *)trig->data;
 559
 560         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 561                 return;
 562
 563         trig_offset = le32_to_cpu(trig_stats->stop_offset);
 564         trig_thold = le32_to_cpu(trig_stats->stop_threshold);
 565
 566         if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
 567                 return;
 568
 569         if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
 570                 return;
 571
 572         iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
 573 }
 574
 575 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
 576                                   struct iwl_rx_packet *pkt)
 577 {
 578         size_t v8_len = sizeof(struct iwl_notif_statistics_v8);
 579         size_t v10_len = sizeof(struct iwl_notif_statistics_v10);
 580         struct iwl_mvm_stat_data data = {
 581                 .mvm = mvm,
 582         };
 583         u32 temperature;
 584
 585         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STATS_V10)) {
 586                 struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
 587
 588                 if (iwl_rx_packet_payload_len(pkt) != v10_len)
 589                         goto invalid;
 590
 591                 temperature = le32_to_cpu(stats->general.radio_temperature);
 592                 data.mac_id = stats->rx.general.mac_id;
 593                 data.beacon_filter_average_energy =
 594                         stats->general.beacon_filter_average_energy;
 595
 596                 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
 597
 598                 mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
 599                 mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
 600                 mvm->radio_stats.on_time_rf =
 601                         le64_to_cpu(stats->general.on_time_rf);
 602                 mvm->radio_stats.on_time_scan =
 603                         le64_to_cpu(stats->general.on_time_scan);
 604
 605                 data.general = &stats->general;
 606         } else {
 607                 struct iwl_notif_statistics_v8 *stats = (void *)&pkt->data;
 608
 609                 if (iwl_rx_packet_payload_len(pkt) != v8_len)
 610                         goto invalid;
 611
 612                 temperature = le32_to_cpu(stats->general.radio_temperature);
 613                 data.mac_id = stats->rx.general.mac_id;
 614                 data.beacon_filter_average_energy =
 615                         stats->general.beacon_filter_average_energy;
 616
 617                 iwl_mvm_update_rx_statistics(mvm, &stats->rx);
 618         }
 619
 620         iwl_mvm_rx_stats_check_trigger(mvm, pkt);
 621
 622         /* Only handle rx statistics temperature changes if async temp
 623          * notifications are not supported
 624          */
 625         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_ASYNC_DTM))
 626                 iwl_mvm_tt_temp_changed(mvm, temperature);
 627
 628         ieee80211_iterate_active_interfaces(mvm->hw,
 629                                             IEEE80211_IFACE_ITER_NORMAL,
 630                                             iwl_mvm_stat_iterator,
 631                                             &data);
 632         return;
 633  invalid:
 634         IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
 635                 iwl_rx_packet_payload_len(pkt));
 636 }
 637
 638 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 639 {
 640         iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
 641 }