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

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2012-2014, 2018-2020 Intel Corporation
   4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6  */
   7 #include <asm/unaligned.h>
   8 #include <linux/etherdevice.h>
   9 #include <linux/skbuff.h>
  10 #include "iwl-trans.h"
  11 #include "mvm.h"
  12 #include "fw-api.h"
  13
  14 /*
  15  * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
  16  *
  17  * Copies the phy information in mvm->last_phy_info, it will be used when the
  18  * actual data will come from the fw in the next packet.
  19  */
  20 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
  21 {
  22         struct iwl_rx_packet *pkt = rxb_addr(rxb);
  23
  24         memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
  25         mvm->ampdu_ref++;
  26
  27 #ifdef CONFIG_IWLWIFI_DEBUGFS
  28         if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
  29                 spin_lock(&mvm->drv_stats_lock);
  30                 mvm->drv_rx_stats.ampdu_count++;
  31                 spin_unlock(&mvm->drv_stats_lock);
  32         }
  33 #endif
  34 }
  35
  36 /*
  37  * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
  38  *
  39  * Adds the rxb to a new skb and give it to mac80211
  40  */
  41 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
  42                                             struct ieee80211_sta *sta,
  43                                             struct napi_struct *napi,
  44                                             struct sk_buff *skb,
  45                                             struct ieee80211_hdr *hdr, u16 len,
  46                                             u8 crypt_len,
  47                                             struct iwl_rx_cmd_buffer *rxb)
  48 {
  49         unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
  50         unsigned int fraglen;
  51
  52         /*
  53          * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len,
  54          * but those are all multiples of 4 long) all goes away, but we
  55          * want the *end* of it, which is going to be the start of the IP
  56          * header, to be aligned when it gets pulled in.
  57          * The beginning of the skb->data is aligned on at least a 4-byte
  58          * boundary after allocation. Everything here is aligned at least
  59          * on a 2-byte boundary so we can just take hdrlen & 3 and pad by
  60          * the result.
  61          */
  62         skb_reserve(skb, hdrlen & 3);
  63
  64         /* If frame is small enough to fit in skb->head, pull it completely.
  65          * If not, only pull ieee80211_hdr (including crypto if present, and
  66          * an additional 8 bytes for SNAP/ethertype, see below) so that
  67          * splice() or TCP coalesce are more efficient.
  68          *
  69          * Since, in addition, ieee80211_data_to_8023() always pull in at
  70          * least 8 bytes (possibly more for mesh) we can do the same here
  71          * to save the cost of doing it later. That still doesn't pull in
  72          * the actual IP header since the typical case has a SNAP header.
  73          * If the latter changes (there are efforts in the standards group
  74          * to do so) we should revisit this and ieee80211_data_to_8023().
  75          */
  76         hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8;
  77
  78         skb_put_data(skb, hdr, hdrlen);
  79         fraglen = len - hdrlen;
  80
  81         if (fraglen) {
  82                 int offset = (void *)hdr + hdrlen -
  83                              rxb_addr(rxb) + rxb_offset(rxb);
  84
  85                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
  86                                 fraglen, rxb->truesize);
  87         }
  88
  89         ieee80211_rx_napi(mvm->hw, sta, skb, napi);
  90 }
  91
  92 /*
  93  * iwl_mvm_get_signal_strength - use new rx PHY INFO API
  94  * values are reported by the fw as positive values - need to negate
  95  * to obtain their dBM.  Account for missing antennas by replacing 0
  96  * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
  97  */
  98 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
  99                                         struct iwl_rx_phy_info *phy_info,
 100                                         struct ieee80211_rx_status *rx_status)
 101 {
 102         int energy_a, energy_b, energy_c, max_energy;
 103         u32 val;
 104
 105         val =
 106             le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
 107         energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
 108                                                 IWL_RX_INFO_ENERGY_ANT_A_POS;
 109         energy_a = energy_a ? -energy_a : S8_MIN;
 110         energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
 111                                                 IWL_RX_INFO_ENERGY_ANT_B_POS;
 112         energy_b = energy_b ? -energy_b : S8_MIN;
 113         energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
 114                                                 IWL_RX_INFO_ENERGY_ANT_C_POS;
 115         energy_c = energy_c ? -energy_c : S8_MIN;
 116         max_energy = max(energy_a, energy_b);
 117         max_energy = max(max_energy, energy_c);
 118
 119         IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
 120                         energy_a, energy_b, energy_c, max_energy);
 121
 122         rx_status->signal = max_energy;
 123         rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
 124                                 RX_RES_PHY_FLAGS_ANTENNA)
 125                                         >> RX_RES_PHY_FLAGS_ANTENNA_POS;
 126         rx_status->chain_signal[0] = energy_a;
 127         rx_status->chain_signal[1] = energy_b;
 128         rx_status->chain_signal[2] = energy_c;
 129 }
 130
 131 /*
 132  * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
 133  * @mvm: the mvm object
 134  * @hdr: 80211 header
 135  * @stats: status in mac80211's format
 136  * @rx_pkt_status: status coming from fw
 137  *
 138  * returns non 0 value if the packet should be dropped
 139  */
 140 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
 141                                         struct ieee80211_hdr *hdr,
 142                                         struct ieee80211_rx_status *stats,
 143                                         u32 rx_pkt_status,
 144                                         u8 *crypt_len)
 145 {
 146         if (!ieee80211_has_protected(hdr->frame_control) ||
 147             (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 148                              RX_MPDU_RES_STATUS_SEC_NO_ENC)
 149                 return 0;
 150
 151         /* packet was encrypted with unknown alg */
 152         if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 153                                         RX_MPDU_RES_STATUS_SEC_ENC_ERR)
 154                 return 0;
 155
 156         switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
 157         case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
 158                 /* alg is CCM: check MIC only */
 159                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 160                         return -1;
 161
 162                 stats->flag |= RX_FLAG_DECRYPTED;
 163                 *crypt_len = IEEE80211_CCMP_HDR_LEN;
 164                 return 0;
 165
 166         case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
 167                 /* Don't drop the frame and decrypt it in SW */
 168                 if (!fw_has_api(&mvm->fw->ucode_capa,
 169                                 IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
 170                     !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
 171                         return 0;
 172                 *crypt_len = IEEE80211_TKIP_IV_LEN;
 173                 fallthrough;
 174
 175         case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
 176                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
 177                         return -1;
 178
 179                 stats->flag |= RX_FLAG_DECRYPTED;
 180                 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
 181                                 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
 182                         *crypt_len = IEEE80211_WEP_IV_LEN;
 183                 return 0;
 184
 185         case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
 186                 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
 187                         return -1;
 188                 stats->flag |= RX_FLAG_DECRYPTED;
 189                 return 0;
 190
 191         default:
 192                 /* Expected in monitor (not having the keys) */
 193                 if (!mvm->monitor_on)
 194                         IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
 195         }
 196
 197         return 0;
 198 }
 199
 200 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm,
 201                                   struct ieee80211_sta *sta,
 202                                   struct ieee80211_hdr *hdr, u32 len,
 203                                   struct iwl_rx_phy_info *phy_info,
 204                                   u32 rate_n_flags)
 205 {
 206         struct iwl_mvm_sta *mvmsta;
 207         struct iwl_mvm_tcm_mac *mdata;
 208         int mac;
 209         int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */
 210         struct iwl_mvm_vif *mvmvif;
 211         /* expected throughput in 100Kbps, single stream, 20 MHz */
 212         static const u8 thresh_tpt[] = {
 213                 9, 18, 30, 42, 60, 78, 90, 96, 120, 135,
 214         };
 215         u16 thr;
 216
 217         if (ieee80211_is_data_qos(hdr->frame_control))
 218                 ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)];
 219
 220         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 221         mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
 222
 223         if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
 224                 schedule_delayed_work(&mvm->tcm.work, 0);
 225         mdata = &mvm->tcm.data[mac];
 226         mdata->rx.pkts[ac]++;
 227
 228         /* count the airtime only once for each ampdu */
 229         if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
 230                 mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
 231                 mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
 232         }
 233
 234         if (!(rate_n_flags & (RATE_MCS_HT_MSK | RATE_MCS_VHT_MSK)))
 235                 return;
 236
 237         mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 238
 239         if (mdata->opened_rx_ba_sessions ||
 240             mdata->uapsd_nonagg_detect.detected ||
 241             (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
 242              !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
 243              !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
 244              !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) ||
 245             mvmsta->sta_id != mvmvif->ap_sta_id)
 246                 return;
 247
 248         if (rate_n_flags & RATE_MCS_HT_MSK) {
 249                 thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK];
 250                 thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK) >>
 251                                         RATE_HT_MCS_NSS_POS);
 252         } else {
 253                 if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >=
 254                                 ARRAY_SIZE(thresh_tpt)))
 255                         return;
 256                 thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
 257                 thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
 258                                         RATE_VHT_MCS_NSS_POS);
 259         }
 260
 261         thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) >>
 262                                 RATE_MCS_CHAN_WIDTH_POS);
 263
 264         mdata->uapsd_nonagg_detect.rx_bytes += len;
 265         ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
 266 }
 267
 268 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
 269                             struct sk_buff *skb,
 270                             u32 status)
 271 {
 272         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 273         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 274
 275         if (mvmvif->features & NETIF_F_RXCSUM &&
 276             status & RX_MPDU_RES_STATUS_CSUM_DONE &&
 277             status & RX_MPDU_RES_STATUS_CSUM_OK)
 278                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 279 }
 280
 281 /*
 282  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
 283  *
 284  * Handles the actual data of the Rx packet from the fw
 285  */
 286 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
 287                         struct iwl_rx_cmd_buffer *rxb)
 288 {
 289         struct ieee80211_hdr *hdr;
 290         struct ieee80211_rx_status *rx_status;
 291         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 292         struct iwl_rx_phy_info *phy_info;
 293         struct iwl_rx_mpdu_res_start *rx_res;
 294         struct ieee80211_sta *sta = NULL;
 295         struct sk_buff *skb;
 296         u32 len, pkt_len = iwl_rx_packet_payload_len(pkt);
 297         u32 rate_n_flags;
 298         u32 rx_pkt_status;
 299         u8 crypt_len = 0;
 300
 301         if (unlikely(pkt_len < sizeof(*rx_res))) {
 302                 IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
 303                 return;
 304         }
 305
 306         phy_info = &mvm->last_phy_info;
 307         rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
 308         hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
 309         len = le16_to_cpu(rx_res->byte_count);
 310
 311         if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
 312                 IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
 313                 return;
 314         }
 315
 316         rx_pkt_status = get_unaligned_le32((__le32 *)
 317                 (pkt->data + sizeof(*rx_res) + len));
 318
 319         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 320          * ieee80211_hdr pulled.
 321          */
 322         skb = alloc_skb(128, GFP_ATOMIC);
 323         if (!skb) {
 324                 IWL_ERR(mvm, "alloc_skb failed\n");
 325                 return;
 326         }
 327
 328         rx_status = IEEE80211_SKB_RXCB(skb);
 329
 330         /*
 331          * drop the packet if it has failed being decrypted by HW
 332          */
 333         if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
 334                                          &crypt_len)) {
 335                 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
 336                                rx_pkt_status);
 337                 kfree_skb(skb);
 338                 return;
 339         }
 340
 341         /*
 342          * Keep packets with CRC errors (and with overrun) for monitor mode
 343          * (otherwise the firmware discards them) but mark them as bad.
 344          */
 345         if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
 346             !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
 347                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
 348                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 349         }
 350
 351         /* This will be used in several places later */
 352         rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
 353
 354         /* rx_status carries information about the packet to mac80211 */
 355         rx_status->mactime = le64_to_cpu(phy_info->timestamp);
 356         rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
 357         rx_status->band =
 358                 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
 359                                 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 360         rx_status->freq =
 361                 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
 362                                                rx_status->band);
 363
 364         /* TSF as indicated by the firmware  is at INA time */
 365         rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
 366
 367         iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
 368
 369         IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
 370                               (unsigned long long)rx_status->mactime);
 371
 372         rcu_read_lock();
 373         if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
 374                 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
 375
 376                 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
 377
 378                 if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
 379                         sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
 380                         if (IS_ERR(sta))
 381                                 sta = NULL;
 382                 }
 383         } else if (!is_multicast_ether_addr(hdr->addr2)) {
 384                 /* This is fine since we prevent two stations with the same
 385                  * address from being added.
 386                  */
 387                 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
 388         }
 389
 390         if (sta) {
 391                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 392                 struct ieee80211_vif *tx_blocked_vif =
 393                         rcu_dereference(mvm->csa_tx_blocked_vif);
 394                 struct iwl_fw_dbg_trigger_tlv *trig;
 395                 struct ieee80211_vif *vif = mvmsta->vif;
 396
 397                 /* We have tx blocked stations (with CS bit). If we heard
 398                  * frames from a blocked station on a new channel we can
 399                  * TX to it again.
 400                  */
 401                 if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) {
 402                         struct iwl_mvm_vif *mvmvif =
 403                                 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
 404
 405                         if (mvmvif->csa_target_freq == rx_status->freq)
 406                                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
 407                                                                  false);
 408                 }
 409
 410                 rs_update_last_rssi(mvm, mvmsta, rx_status);
 411
 412                 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
 413                                              ieee80211_vif_to_wdev(vif),
 414                                              FW_DBG_TRIGGER_RSSI);
 415
 416                 if (trig && ieee80211_is_beacon(hdr->frame_control)) {
 417                         struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
 418                         s32 rssi;
 419
 420                         rssi_trig = (void *)trig->data;
 421                         rssi = le32_to_cpu(rssi_trig->rssi);
 422
 423                         if (rx_status->signal < rssi)
 424                                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
 425                                                         NULL);
 426                 }
 427
 428                 if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
 429                     !is_multicast_ether_addr(hdr->addr1) &&
 430                     ieee80211_is_data(hdr->frame_control))
 431                         iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info,
 432                                               rate_n_flags);
 433
 434                 if (ieee80211_is_data(hdr->frame_control))
 435                         iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
 436         }
 437         rcu_read_unlock();
 438
 439         /* set the preamble flag if appropriate */
 440         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
 441                 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
 442
 443         if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
 444                 /*
 445                  * We know which subframes of an A-MPDU belong
 446                  * together since we get a single PHY response
 447                  * from the firmware for all of them
 448                  */
 449                 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
 450                 rx_status->ampdu_reference = mvm->ampdu_ref;
 451         }
 452
 453         /* Set up the HT phy flags */
 454         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
 455         case RATE_MCS_CHAN_WIDTH_20:
 456                 break;
 457         case RATE_MCS_CHAN_WIDTH_40:
 458                 rx_status->bw = RATE_INFO_BW_40;
 459                 break;
 460         case RATE_MCS_CHAN_WIDTH_80:
 461                 rx_status->bw = RATE_INFO_BW_80;
 462                 break;
 463         case RATE_MCS_CHAN_WIDTH_160:
 464                 rx_status->bw = RATE_INFO_BW_160;
 465                 break;
 466         }
 467         if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
 468             rate_n_flags & RATE_MCS_SGI_MSK)
 469                 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
 470         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
 471                 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
 472         if (rate_n_flags & RATE_MCS_LDPC_MSK)
 473                 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
 474         if (rate_n_flags & RATE_MCS_HT_MSK) {
 475                 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
 476                                 RATE_MCS_STBC_POS;
 477                 rx_status->encoding = RX_ENC_HT;
 478                 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
 479                 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
 480         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
 481                 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
 482                                 RATE_MCS_STBC_POS;
 483                 rx_status->nss =
 484                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
 485                                                 RATE_VHT_MCS_NSS_POS) + 1;
 486                 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
 487                 rx_status->encoding = RX_ENC_VHT;
 488                 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
 489                 if (rate_n_flags & RATE_MCS_BF_MSK)
 490                         rx_status->enc_flags |= RX_ENC_FLAG_BF;
 491         } else {
 492                 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
 493                                                                rx_status->band);
 494
 495                 if (WARN(rate < 0 || rate > 0xFF,
 496                          "Invalid rate flags 0x%x, band %d,\n",
 497                          rate_n_flags, rx_status->band)) {
 498                         kfree_skb(skb);
 499                         return;
 500                 }
 501                 rx_status->rate_idx = rate;
 502         }
 503
 504 #ifdef CONFIG_IWLWIFI_DEBUGFS
 505         iwl_mvm_update_frame_stats(mvm, rate_n_flags,
 506                                    rx_status->flag & RX_FLAG_AMPDU_DETAILS);
 507 #endif
 508
 509         if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
 510                       ieee80211_is_probe_resp(hdr->frame_control)) &&
 511                      mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
 512                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
 513
 514         if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
 515                      ieee80211_is_probe_resp(hdr->frame_control)))
 516                 rx_status->boottime_ns = ktime_get_boottime_ns();
 517
 518         iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
 519                                         crypt_len, rxb);
 520 }
 521
 522 struct iwl_mvm_stat_data {
 523         struct iwl_mvm *mvm;
 524         __le32 flags;
 525         __le32 mac_id;
 526         u8 beacon_filter_average_energy;
 527         __le32 *beacon_counter;
 528         u8 *beacon_average_energy;
 529 };
 530
 531 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
 532                                   struct ieee80211_vif *vif)
 533 {
 534         struct iwl_mvm_stat_data *data = _data;
 535         struct iwl_mvm *mvm = data->mvm;
 536         int sig = -data->beacon_filter_average_energy;
 537         int last_event;
 538         int thold = vif->bss_conf.cqm_rssi_thold;
 539         int hyst = vif->bss_conf.cqm_rssi_hyst;
 540         u16 id = le32_to_cpu(data->mac_id);
 541         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 542         u16 vif_id = mvmvif->id;
 543
 544         /* This doesn't need the MAC ID check since it's not taking the
 545          * data copied into the "data" struct, but rather the data from
 546          * the notification directly.
 547          */
 548         mvmvif->beacon_stats.num_beacons =
 549                 le32_to_cpu(data->beacon_counter[vif_id]);
 550         mvmvif->beacon_stats.avg_signal =
 551                 -data->beacon_average_energy[vif_id];
 552
 553         /* make sure that beacon statistics don't go backwards with TCM
 554          * request to clear statistics
 555          */
 556         if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
 557                 mvmvif->beacon_stats.accu_num_beacons +=
 558                         mvmvif->beacon_stats.num_beacons;
 559
 560         if (mvmvif->id != id)
 561                 return;
 562
 563         if (vif->type != NL80211_IFTYPE_STATION)
 564                 return;
 565
 566         if (sig == 0) {
 567                 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
 568                 return;
 569         }
 570
 571         mvmvif->bf_data.ave_beacon_signal = sig;
 572
 573         /* BT Coex */
 574         if (mvmvif->bf_data.bt_coex_min_thold !=
 575             mvmvif->bf_data.bt_coex_max_thold) {
 576                 last_event = mvmvif->bf_data.last_bt_coex_event;
 577                 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
 578                     (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
 579                      last_event == 0)) {
 580                         mvmvif->bf_data.last_bt_coex_event = sig;
 581                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
 582                                      sig);
 583                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
 584                 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
 585                            (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
 586                             last_event == 0)) {
 587                         mvmvif->bf_data.last_bt_coex_event = sig;
 588                         IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
 589                                      sig);
 590                         iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
 591                 }
 592         }
 593
 594         if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
 595                 return;
 596
 597         /* CQM Notification */
 598         last_event = mvmvif->bf_data.last_cqm_event;
 599         if (thold && sig < thold && (last_event == 0 ||
 600                                      sig < last_event - hyst)) {
 601                 mvmvif->bf_data.last_cqm_event = sig;
 602                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
 603                              sig);
 604                 ieee80211_cqm_rssi_notify(
 605                         vif,
 606                         NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 607                         sig,
 608                         GFP_KERNEL);
 609         } else if (sig > thold &&
 610                    (last_event == 0 || sig > last_event + hyst)) {
 611                 mvmvif->bf_data.last_cqm_event = sig;
 612                 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
 613                              sig);
 614                 ieee80211_cqm_rssi_notify(
 615                         vif,
 616                         NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 617                         sig,
 618                         GFP_KERNEL);
 619         }
 620 }
 621
 622 static inline void
 623 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
 624 {
 625         struct iwl_fw_dbg_trigger_tlv *trig;
 626         struct iwl_fw_dbg_trigger_stats *trig_stats;
 627         u32 trig_offset, trig_thold;
 628
 629         trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
 630         if (!trig)
 631                 return;
 632
 633         trig_stats = (void *)trig->data;
 634
 635         trig_offset = le32_to_cpu(trig_stats->stop_offset);
 636         trig_thold = le32_to_cpu(trig_stats->stop_threshold);
 637
 638         if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
 639                 return;
 640
 641         if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
 642                 return;
 643
 644         iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
 645 }
 646
 647 static void iwl_mvm_stats_energy_iter(void *_data,
 648                                       struct ieee80211_sta *sta)
 649 {
 650         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 651         u8 *energy = _data;
 652         u32 sta_id = mvmsta->sta_id;
 653
 654         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
 655                       sta_id, IWL_MVM_STATION_COUNT_MAX))
 656                 return;
 657
 658         if (energy[sta_id])
 659                 mvmsta->avg_energy = energy[sta_id];
 660
 661 }
 662
 663 static void
 664 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
 665                               __le32 *rx_bytes_le)
 666 {
 667         int i;
 668
 669         spin_lock(&mvm->tcm.lock);
 670         for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
 671                 struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
 672                 u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
 673                 u32 airtime = le32_to_cpu(air_time_le[i]);
 674
 675                 mdata->rx.airtime += airtime;
 676                 mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
 677                 if (airtime) {
 678                         /* re-init every time to store rate from FW */
 679                         ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
 680                         ewma_rate_add(&mdata->uapsd_nonagg_detect.rate,
 681                                       rx_bytes * 8 / airtime);
 682                 }
 683         }
 684         spin_unlock(&mvm->tcm.lock);
 685 }
 686
 687 static void
 688 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
 689                                  struct iwl_rx_packet *pkt)
 690 {
 691         struct iwl_mvm_stat_data data = {
 692                 .mvm = mvm,
 693         };
 694         u8 beacon_average_energy[MAC_INDEX_AUX];
 695         u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
 696         struct iwl_statistics_operational_ntfy *stats;
 697         int expected_size;
 698         __le32 flags;
 699         int i;
 700
 701         expected_size = sizeof(*stats);
 702         if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
 703                       "received invalid statistics size (%d)!, expected_size: %d\n",
 704                       iwl_rx_packet_payload_len(pkt), expected_size))
 705                 return;
 706
 707         stats = (void *)&pkt->data;
 708
 709         if (WARN_ONCE(stats->hdr.type != FW_STATISTICS_OPERATIONAL ||
 710                       stats->hdr.version !=
 711                       iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, STATISTICS_CMD, 0),
 712                       "received unsupported hdr type %d, version %d\n",
 713                       stats->hdr.type, stats->hdr.version))
 714                 return;
 715
 716         flags = stats->flags;
 717         mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
 718         mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
 719         mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
 720         mvm->radio_stats.on_time_scan = le64_to_cpu(stats->on_time_scan);
 721
 722         iwl_mvm_rx_stats_check_trigger(mvm, pkt);
 723
 724         data.mac_id = stats->mac_id;
 725         data.beacon_filter_average_energy =
 726                 le32_to_cpu(stats->beacon_filter_average_energy);
 727         data.flags = flags;
 728         data.beacon_counter = stats->beacon_counter;
 729         for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
 730                 beacon_average_energy[i] =
 731                         le32_to_cpu(stats->beacon_average_energy[i]);
 732
 733         data.beacon_average_energy = beacon_average_energy;
 734
 735         ieee80211_iterate_active_interfaces(mvm->hw,
 736                                             IEEE80211_IFACE_ITER_NORMAL,
 737                                             iwl_mvm_stat_iterator,
 738                                             &data);
 739
 740         for (i = 0; i < ARRAY_SIZE(average_energy); i++)
 741                 average_energy[i] = le32_to_cpu(stats->average_energy[i]);
 742         ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
 743                                           average_energy);
 744         /*
 745          * Don't update in case the statistics are not cleared, since
 746          * we will end up counting twice the same airtime, once in TCM
 747          * request and once in statistics notification.
 748          */
 749         if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
 750                 iwl_mvm_update_tcm_from_stats(mvm, stats->air_time,
 751                                               stats->rx_bytes);
 752 }
 753
 754 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
 755                                   struct iwl_rx_packet *pkt)
 756 {
 757         struct iwl_mvm_stat_data data = {
 758                 .mvm = mvm,
 759         };
 760         __le32 *bytes, *air_time, flags;
 761         int expected_size;
 762         u8 *energy;
 763
 764         /* From ver 14 and up we use TLV statistics format */
 765         if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP,
 766                                     STATISTICS_CMD, 0) >= 14)
 767                 return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
 768
 769         if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
 770                 if (iwl_mvm_has_new_rx_api(mvm))
 771                         expected_size = sizeof(struct iwl_notif_statistics_v11);
 772                 else
 773                         expected_size = sizeof(struct iwl_notif_statistics_v10);
 774         } else {
 775                 expected_size = sizeof(struct iwl_notif_statistics);
 776         }
 777
 778         if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
 779                       "received invalid statistics size (%d)!\n",
 780                       iwl_rx_packet_payload_len(pkt)))
 781                 return;
 782
 783         if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
 784                 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
 785
 786                 data.mac_id = stats->rx.general.mac_id;
 787                 data.beacon_filter_average_energy =
 788                         stats->general.common.beacon_filter_average_energy;
 789
 790                 mvm->rx_stats_v3 = stats->rx;
 791
 792                 mvm->radio_stats.rx_time =
 793                         le64_to_cpu(stats->general.common.rx_time);
 794                 mvm->radio_stats.tx_time =
 795                         le64_to_cpu(stats->general.common.tx_time);
 796                 mvm->radio_stats.on_time_rf =
 797                         le64_to_cpu(stats->general.common.on_time_rf);
 798                 mvm->radio_stats.on_time_scan =
 799                         le64_to_cpu(stats->general.common.on_time_scan);
 800
 801                 data.beacon_counter = stats->general.beacon_counter;
 802                 data.beacon_average_energy =
 803                         stats->general.beacon_average_energy;
 804                 flags = stats->flag;
 805         } else {
 806                 struct iwl_notif_statistics *stats = (void *)&pkt->data;
 807
 808                 data.mac_id = stats->rx.general.mac_id;
 809                 data.beacon_filter_average_energy =
 810                         stats->general.common.beacon_filter_average_energy;
 811
 812                 mvm->rx_stats = stats->rx;
 813
 814                 mvm->radio_stats.rx_time =
 815                         le64_to_cpu(stats->general.common.rx_time);
 816                 mvm->radio_stats.tx_time =
 817                         le64_to_cpu(stats->general.common.tx_time);
 818                 mvm->radio_stats.on_time_rf =
 819                         le64_to_cpu(stats->general.common.on_time_rf);
 820                 mvm->radio_stats.on_time_scan =
 821                         le64_to_cpu(stats->general.common.on_time_scan);
 822
 823                 data.beacon_counter = stats->general.beacon_counter;
 824                 data.beacon_average_energy =
 825                         stats->general.beacon_average_energy;
 826                 flags = stats->flag;
 827         }
 828         data.flags = flags;
 829
 830         iwl_mvm_rx_stats_check_trigger(mvm, pkt);
 831
 832         ieee80211_iterate_active_interfaces(mvm->hw,
 833                                             IEEE80211_IFACE_ITER_NORMAL,
 834                                             iwl_mvm_stat_iterator,
 835                                             &data);
 836
 837         if (!iwl_mvm_has_new_rx_api(mvm))
 838                 return;
 839
 840         if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
 841                 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
 842
 843                 energy = (void *)&v11->load_stats.avg_energy;
 844                 bytes = (void *)&v11->load_stats.byte_count;
 845                 air_time = (void *)&v11->load_stats.air_time;
 846         } else {
 847                 struct iwl_notif_statistics *stats = (void *)&pkt->data;
 848
 849                 energy = (void *)&stats->load_stats.avg_energy;
 850                 bytes = (void *)&stats->load_stats.byte_count;
 851                 air_time = (void *)&stats->load_stats.air_time;
 852         }
 853         ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
 854                                           energy);
 855
 856         /*
 857          * Don't update in case the statistics are not cleared, since
 858          * we will end up counting twice the same airtime, once in TCM
 859          * request and once in statistics notification.
 860          */
 861         if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
 862                 iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
 863
 864 }
 865
 866 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 867 {
 868         iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
 869 }
 870
 871 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
 872                                  struct iwl_rx_cmd_buffer *rxb)
 873 {
 874         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 875         struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
 876         int i;
 877         u32 pkt_len = iwl_rx_packet_payload_len(pkt);
 878
 879         if (WARN_ONCE(pkt_len != sizeof(*notif),
 880                       "Received window status notification of wrong size (%u)\n",
 881                       pkt_len))
 882                 return;
 883
 884         rcu_read_lock();
 885         for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
 886                 struct ieee80211_sta *sta;
 887                 u8 sta_id, tid;
 888                 u64 bitmap;
 889                 u32 ssn;
 890                 u16 ratid;
 891                 u16 received_mpdu;
 892
 893                 ratid = le16_to_cpu(notif->ra_tid[i]);
 894                 /* check that this TID is valid */
 895                 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
 896                         continue;
 897
 898                 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
 899                 if (received_mpdu == 0)
 900                         continue;
 901
 902                 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
 903                 /* get the station */
 904                 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
 905                          >> BA_WINDOW_STATUS_STA_ID_POS;
 906                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 907                 if (IS_ERR_OR_NULL(sta))
 908                         continue;
 909                 bitmap = le64_to_cpu(notif->bitmap[i]);
 910                 ssn = le32_to_cpu(notif->start_seq_num[i]);
 911
 912                 /* update mac80211 with the bitmap for the reordering buffer */
 913                 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
 914                                                      received_mpdu);
 915         }
 916         rcu_read_unlock();
 917 }