drivers/net/wireless/intel/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  * Copyright(c) 2016 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * All rights reserved.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  *
  43  *  * Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  *  * Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in
  47  *    the documentation and/or other materials provided with the
  48  *    distribution.
  49  *  * Neither the name Intel Corporation nor the names of its
  50  *    contributors may be used to endorse or promote products derived
  51  *    from this software without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  54  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  55  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  56  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  57  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  58  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  59  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  60  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  61  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  62  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  63  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  64  *****************************************************************************/
  65 #include <linux/etherdevice.h>
  66 #include <linux/skbuff.h>
  67 #include "iwl-trans.h"
  68 #include "mvm.h"
  69 #include "fw-api.h"
  70 #include "fw-dbg.h"
  71
  72 /*
  73  * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
  74  *
  75  * Copies the phy information in mvm->last_phy_info, it will be used when the
  76  * actual data will come from the fw in the next packet.
  77  */
  78 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
  79 {
  80         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  81
  82         memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
  83         mvm->ampdu_ref++;
  84
  85 #ifdef CONFIG_IWLWIFI_DEBUGFS
  86         if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
  87                 spin_lock(&mvm->drv_stats_lock);
  88                 mvm->drv_rx_stats.ampdu_count++;
  89                 spin_unlock(&mvm->drv_stats_lock);
  90         }
  91 #endif
  92 }
  93
  94 /*
  95  * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
  96  *
  97  * Adds the rxb to a new skb and give it to mac80211
  98  */
  99 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
 100                                             struct napi_struct *napi,
 101                                             struct sk_buff *skb,
 102                                             struct ieee80211_hdr *hdr, u16 len,
 103                                             u32 ampdu_status, u8 crypt_len,
 104                                             struct iwl_rx_cmd_buffer *rxb)
 105 {
 106         unsigned int hdrlen, fraglen;
 107
 108         /* If frame is small enough to fit in skb->head, pull it completely.
 109          * If not, only pull ieee80211_hdr (including crypto if present, and
 110          * an additional 8 bytes for SNAP/ethertype, see below) so that
 111          * splice() or TCP coalesce are more efficient.
 112          *
 113          * Since, in addition, ieee80211_data_to_8023() always pull in at
 114          * least 8 bytes (possibly more for mesh) we can do the same here
 115          * to save the cost of doing it later. That still doesn't pull in
 116          * the actual IP header since the typical case has a SNAP header.
 117          * If the latter changes (there are efforts in the standards group
 118          * to do so) we should revisit this and ieee80211_data_to_8023().
 119          */
 120         hdrlen = (len <= skb_tailroom(skb)) ? len :
 121                                               sizeof(*hdr) + crypt_len + 8;
 122
 123         memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
 124         fraglen = len - hdrlen;
 125
 126         if (fraglen) {
 127                 int offset = (void *)hdr + hdrlen -
 128                              rxb_addr(rxb) + rxb_offset(rxb);
 129
 130                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 131                                 fraglen, rxb->truesize);
 132         }
 133
 134         ieee80211_rx_napi(mvm->hw, NULL, skb, napi);
 135 }
 136
 137 /*
 138  * iwl_mvm_get_signal_strength - use new rx PHY INFO API
 139  * values are reported by the fw as positive values - need to negate
 140  * to obtain their dBM.  Account for missing antennas by replacing 0
 141  * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
 142  */
 143 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 144                                         struct iwl_rx_phy_info *phy_info,
 145                                         struct ieee80211_rx_status *rx_status)
 146 {
 147         int energy_a, energy_b, energy_c, max_energy;
 148         u32 val;
 149
 150         val =
 151             le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
 152         energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
 153                                                 IWL_RX_INFO_ENERGY_ANT_A_POS;
 154         energy_a = energy_a ? -energy_a : S8_MIN;
 155         energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
 156                                                 IWL_RX_INFO_ENERGY_ANT_B_POS;
 157         energy_b = energy_b ? -energy_b : S8_MIN;
 158         energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
 159                                                 IWL_RX_INFO_ENERGY_ANT_C_POS;
 160         energy_c = energy_c ? -energy_c : S8_MIN;
 161         max_energy = max(energy_a, energy_b);
 162         max_energy = max(max_energy, energy_c);
 163
 164         IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
 165                         energy_a, energy_b, energy_c, max_energy);
 166
 167         rx_status->signal = max_energy;
 168         rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
 169                                 RX_RES_PHY_FLAGS_ANTENNA)
 170                                         >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 171         rx_status->chain_signal[0] = energy_a;
 172         rx_status->chain_signal[1] = energy_b;
 173         rx_status->chain_signal[2] = energy_c;
 174 }
 175
 176 /*
 177  * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
 178  * @mvm: the mvm object
 179  * @hdr: 80211 header
 180  * @stats: status in mac80211's format
 181  * @rx_pkt_status: status coming from fw
 182  *
 183  * returns non 0 value if the packet should be dropped
 184  */
 185 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
 186                                         struct ieee80211_hdr *hdr,
 187                                         struct ieee80211_rx_status *stats,
 188                                         u32 rx_pkt_status,
 189                                         u8 *crypt_len)
 190 {
 191         if (!ieee80211_has_protected(hdr->frame_control) ||
 192             (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 193                              RX_MPDU_RES_STATUS_SEC_NO_ENC)
 194                 return 0;
 195
 196         /* packet was encrypted with unknown alg */
 197         if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 198                                         RX_MPDU_RES_STATUS_SEC_ENC_ERR)
 199                 return 0;
 200
 201         switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
 202         case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
 203                 /* alg is CCM: check MIC only */
 204                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 205                         return -1;
 206
 207                 stats->flag |= RX_FLAG_DECRYPTED;
 208                 *crypt_len = IEEE80211_CCMP_HDR_LEN;
 209                 return 0;
 210
 211         case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
 212                 /* Don't drop the frame and decrypt it in SW */
 213                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
 214                         return 0;
 215                 *crypt_len = IEEE80211_TKIP_IV_LEN;
 216                 /* fall through if TTAK OK */
 217
 218         case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
 219                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
 220                         return -1;
 221
 222                 stats->flag |= RX_FLAG_DECRYPTED;
 223                 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 224                                 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
 225                         *crypt_len = IEEE80211_WEP_IV_LEN;
 226                 return 0;
 227
 228         case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
 229                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 230                         return -1;
 231                 stats->flag |= RX_FLAG_DECRYPTED;
 232                 return 0;
 233
 234         default:
 235                 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
 236         }
 237
 238         return 0;
 239 }
 240
 241 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
 242                             struct sk_buff *skb,
 243                             u32 status)
 244 {
 245         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 246         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 247
 248         if (mvmvif->features & NETIF_F_RXCSUM &&
 249             status & RX_MPDU_RES_STATUS_CSUM_DONE &&
 250             status & RX_MPDU_RES_STATUS_CSUM_OK)
 251                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 252 }
 253
 254 /*
 255  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
 256  *
 257  * Handles the actual data of the Rx packet from the fw
 258  */
 259 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
 260                         struct iwl_rx_cmd_buffer *rxb)
 261 {
 262         struct ieee80211_hdr *hdr;
 263         struct ieee80211_rx_status *rx_status;
 264         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 265         struct iwl_rx_phy_info *phy_info;
 266         struct iwl_rx_mpdu_res_start *rx_res;
 267         struct ieee80211_sta *sta = NULL;
 268         struct sk_buff *skb;
 269         u32 len;
 270         u32 ampdu_status;
 271         u32 rate_n_flags;
 272         u32 rx_pkt_status;
 273         u8 crypt_len = 0;
 274
 275         phy_info = &mvm->last_phy_info;
 276         rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
 277         hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
 278         len = le16_to_cpu(rx_res->byte_count);
 279         rx_pkt_status = le32_to_cpup((__le32 *)
 280                 (pkt->data + sizeof(*rx_res) + len));
 281
 282         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 283          * ieee80211_hdr pulled.
 284          */
 285         skb = alloc_skb(128, GFP_ATOMIC);
 286         if (!skb) {
 287                 IWL_ERR(mvm, "alloc_skb failed\n");
 288                 return;
 289         }
 290
 291         rx_status = IEEE80211_SKB_RXCB(skb);
 292
 293         /*
 294          * drop the packet if it has failed being decrypted by HW
 295          */
 296         if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
 297                                          &crypt_len)) {
 298                 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
 299                                rx_pkt_status);
 300                 kfree_skb(skb);
 301                 return;
 302         }
 303
 304         /*
 305          * Keep packets with CRC errors (and with overrun) for monitor mode
 306          * (otherwise the firmware discards them) but mark them as bad.
 307          */
 308         if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
 309             !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
 310                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
 311                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 312         }
 313
 314         /* This will be used in several places later */
 315         rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
 316
 317         /* rx_status carries information about the packet to mac80211 */
 318         rx_status->mactime = le64_to_cpu(phy_info->timestamp);
 319         rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
 320         rx_status->band =
 321                 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
 322                                 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 323         rx_status->freq =
 324                 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
 325                                                rx_status->band);
 326
 327         /* TSF as indicated by the firmware  is at INA time */
 328         rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
 329
 330         iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
 331
 332         IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
 333                               (unsigned long long)rx_status->mactime);
 334
 335         rcu_read_lock();
 336         if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
 337                 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
 338
 339                 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
 340
 341                 if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
 342                         sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
 343                         if (IS_ERR(sta))
 344                                 sta = NULL;
 345                 }
 346         } else if (!is_multicast_ether_addr(hdr->addr2)) {
 347                 /* This is fine since we prevent two stations with the same
 348                  * address from being added.
 349                  */
 350                 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
 351         }
 352
 353         if (sta) {
 354                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 355
 356                 /* We have tx blocked stations (with CS bit). If we heard
 357                  * frames from a blocked station on a new channel we can
 358                  * TX to it again.
 359                  */
 360                 if (unlikely(mvm->csa_tx_block_bcn_timeout))
 361                         iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
 362
 363                 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
 364
 365                 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
 366                     ieee80211_is_beacon(hdr->frame_control)) {
 367                         struct iwl_fw_dbg_trigger_tlv *trig;
 368                         struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
 369                         bool trig_check;
 370                         s32 rssi;
 371
 372                         trig = iwl_fw_dbg_get_trigger(mvm->fw,
 373                                                       FW_DBG_TRIGGER_RSSI);
 374                         rssi_trig = (void *)trig->data;
 375                         rssi = le32_to_cpu(rssi_trig->rssi);
 376
 377                         trig_check =
 378                                 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
 379                                                               trig);
 380                         if (trig_check && rx_status->signal < rssi)
 381                                 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
 382                 }
 383
 384                 if (ieee80211_is_data(hdr->frame_control))
 385                         iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
 386         }
 387         rcu_read_unlock();
 388
 389         /* set the preamble flag if appropriate */
 390         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
 391                 rx_status->flag |= RX_FLAG_SHORTPRE;
 392
 393         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
 394                 /*
 395                  * We know which subframes of an A-MPDU belong
 396                  * together since we get a single PHY response
 397                  * from the firmware for all of them
 398                  */
 399                 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
 400                 rx_status->ampdu_reference = mvm->ampdu_ref;
 401         }
 402
 403         /* Set up the HT phy flags */
 404         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
 405         case RATE_MCS_CHAN_WIDTH_20:
 406                 break;
 407         case RATE_MCS_CHAN_WIDTH_40:
 408                 rx_status->flag |= RX_FLAG_40MHZ;
 409                 break;
 410         case RATE_MCS_CHAN_WIDTH_80:
 411                 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
 412                 break;
 413         case RATE_MCS_CHAN_WIDTH_160:
 414                 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
 415                 break;
 416         }
 417         if (rate_n_flags & RATE_MCS_SGI_MSK)
 418                 rx_status->flag |= RX_FLAG_SHORT_GI;
 419         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
 420                 rx_status->flag |= RX_FLAG_HT_GF;
 421         if (rate_n_flags & RATE_MCS_LDPC_MSK)
 422                 rx_status->flag |= RX_FLAG_LDPC;
 423         if (rate_n_flags & RATE_MCS_HT_MSK) {
 424                 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
 425                                 RATE_MCS_STBC_POS;
 426                 rx_status->flag |= RX_FLAG_HT;
 427                 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
 428                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 429         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
 430                 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
 431                                 RATE_MCS_STBC_POS;
 432                 rx_status->vht_nss =
 433                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
 434                                                 RATE_VHT_MCS_NSS_POS) + 1;
 435                 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
 436                 rx_status->flag |= RX_FLAG_VHT;
 437                 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
 438                 if (rate_n_flags & RATE_MCS_BF_MSK)
 439                         rx_status->vht_flag |= RX_VHT_FLAG_BF;
 440         } else {
 441                 rx_status->rate_idx =
 442                         iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
 443                                                             rx_status->band);
 444         }
 445
 446 #ifdef CONFIG_IWLWIFI_DEBUGFS
 447         iwl_mvm_update_frame_stats(mvm, rate_n_flags,
 448                                    rx_status->flag & RX_FLAG_AMPDU_DETAILS);
 449 #endif
 450
 451         if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
 452                       ieee80211_is_probe_resp(hdr->frame_control)) &&
 453                      mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
 454                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
 455
 456         iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status,
 457                                         crypt_len, rxb);
 458 }
 459
 460 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
 461                                          struct mvm_statistics_rx *rx_stats)
 462 {
 463         lockdep_assert_held(&mvm->mutex);
 464
 465         mvm->rx_stats = *rx_stats;
 466 }
 467
 468 struct iwl_mvm_stat_data {
 469         struct iwl_mvm *mvm;
 470         __le32 mac_id;
 471         u8 beacon_filter_average_energy;
 472         struct mvm_statistics_general_v8 *general;
 473 };
 474
 475 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
 476                                   struct ieee80211_vif *vif)
 477 {
 478         struct iwl_mvm_stat_data *data = _data;
 479         struct iwl_mvm *mvm = data->mvm;
 480         int sig = -data->beacon_filter_average_energy;
 481         int last_event;
 482         int thold = vif->bss_conf.cqm_rssi_thold;
 483         int hyst = vif->bss_conf.cqm_rssi_hyst;
 484         u16 id = le32_to_cpu(data->mac_id);
 485         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 486
 487         /* This doesn't need the MAC ID check since it's not taking the
 488          * data copied into the "data" struct, but rather the data from
 489          * the notification directly.
 490          */
 491         if (data->general) {
 492                 mvmvif->beacon_stats.num_beacons =
 493                         le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
 494                 mvmvif->beacon_stats.avg_signal =
 495                         -data->general->beacon_average_energy[mvmvif->id];
 496         }
 497
 498         if (mvmvif->id != id)
 499                 return;
 500
 501         if (vif->type != NL80211_IFTYPE_STATION)
 502                 return;
 503
 504         if (sig == 0) {
 505                 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
 506                 return;
 507         }
 508
 509         mvmvif->bf_data.ave_beacon_signal = sig;
 510
 511         /* BT Coex */
 512         if (mvmvif->bf_data.bt_coex_min_thold !=
 513             mvmvif->bf_data.bt_coex_max_thold) {
 514                 last_event = mvmvif->bf_data.last_bt_coex_event;
 515                 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
 516                     (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
 517                      last_event == 0)) {
 518                         mvmvif->bf_data.last_bt_coex_event = sig;
 519                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
 520                                      sig);
 521                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
 522                 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
 523                            (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
 524                             last_event == 0)) {
 525                         mvmvif->bf_data.last_bt_coex_event = sig;
 526                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
 527                                      sig);
 528                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
 529                 }
 530         }
 531
 532         if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
 533                 return;
 534
 535         /* CQM Notification */
 536         last_event = mvmvif->bf_data.last_cqm_event;
 537         if (thold && sig < thold && (last_event == 0 ||
 538                                      sig < last_event - hyst)) {
 539                 mvmvif->bf_data.last_cqm_event = sig;
 540                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
 541                              sig);
 542                 ieee80211_cqm_rssi_notify(
 543                         vif,
 544                         NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 545                         GFP_KERNEL);
 546         } else if (sig > thold &&
 547                    (last_event == 0 || sig > last_event + hyst)) {
 548                 mvmvif->bf_data.last_cqm_event = sig;
 549                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
 550                              sig);
 551                 ieee80211_cqm_rssi_notify(
 552                         vif,
 553                         NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 554                         GFP_KERNEL);
 555         }
 556 }
 557
 558 static inline void
 559 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
 560 {
 561         struct iwl_fw_dbg_trigger_tlv *trig;
 562         struct iwl_fw_dbg_trigger_stats *trig_stats;
 563         u32 trig_offset, trig_thold;
 564
 565         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
 566                 return;
 567
 568         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
 569         trig_stats = (void *)trig->data;
 570
 571         if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
 572                 return;
 573
 574         trig_offset = le32_to_cpu(trig_stats->stop_offset);
 575         trig_thold = le32_to_cpu(trig_stats->stop_threshold);
 576
 577         if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
 578                 return;
 579
 580         if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
 581                 return;
 582
 583         iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
 584 }
 585
 586 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
 587                                   struct iwl_rx_packet *pkt)
 588 {
 589         struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
 590         struct iwl_mvm_stat_data data = {
 591                 .mvm = mvm,
 592         };
 593         u32 temperature;
 594
 595         if (iwl_rx_packet_payload_len(pkt) != sizeof(*stats))
 596                 goto invalid;
 597
 598         temperature = le32_to_cpu(stats->general.radio_temperature);
 599         data.mac_id = stats->rx.general.mac_id;
 600         data.beacon_filter_average_energy =
 601                 stats->general.beacon_filter_average_energy;
 602
 603         iwl_mvm_update_rx_statistics(mvm, &stats->rx);
 604
 605         mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
 606         mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
 607         mvm->radio_stats.on_time_rf =
 608                 le64_to_cpu(stats->general.on_time_rf);
 609         mvm->radio_stats.on_time_scan =
 610                 le64_to_cpu(stats->general.on_time_scan);
 611
 612         data.general = &stats->general;
 613
 614         iwl_mvm_rx_stats_check_trigger(mvm, pkt);
 615
 616         ieee80211_iterate_active_interfaces(mvm->hw,
 617                                             IEEE80211_IFACE_ITER_NORMAL,
 618                                             iwl_mvm_stat_iterator,
 619                                             &data);
 620         return;
 621  invalid:
 622         IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
 623                 iwl_rx_packet_payload_len(pkt));
 624 }
 625
 626 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 627 {
 628         iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
 629 }
 630
 631 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
 632                                  struct iwl_rx_cmd_buffer *rxb)
 633 {
 634         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 635         struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
 636         int i;
 637         u32 pkt_len = iwl_rx_packet_payload_len(pkt);
 638
 639         if (WARN_ONCE(pkt_len != sizeof(*notif),
 640                       "Received window status notification of wrong size (%u)\n",
 641                       pkt_len))
 642                 return;
 643
 644         rcu_read_lock();
 645         for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
 646                 struct ieee80211_sta *sta;
 647                 u8 sta_id, tid;
 648                 u64 bitmap;
 649                 u32 ssn;
 650                 u16 ratid;
 651                 u16 received_mpdu;
 652
 653                 ratid = le16_to_cpu(notif->ra_tid[i]);
 654                 /* check that this TID is valid */
 655                 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
 656                         continue;
 657
 658                 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
 659                 if (received_mpdu == 0)
 660                         continue;
 661
 662                 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
 663                 /* get the station */
 664                 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
 665                          >> BA_WINDOW_STATUS_STA_ID_POS;
 666                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 667                 if (IS_ERR_OR_NULL(sta))
 668                         continue;
 669                 bitmap = le64_to_cpu(notif->bitmap[i]);
 670                 ssn = le32_to_cpu(notif->start_seq_num[i]);
 671
 672                 /* update mac80211 with the bitmap for the reordering buffer */
 673                 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
 674                                                      received_mpdu);
 675         }
 676         rcu_read_unlock();
 677 }