drivers/net/wireless/intel/iwlwifi/mvm/rxmq.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) 2015 - 2017 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  * The full GNU General Public License is included in this distribution
  22  * in the file called COPYING.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  * BSD LICENSE
  29  *
  30  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  31  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  32  * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  33  * All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  *
  39  *  * Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  *  * Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in
  43  *    the documentation and/or other materials provided with the
  44  *    distribution.
  45  *  * Neither the name Intel Corporation nor the names of its
  46  *    contributors may be used to endorse or promote products derived
  47  *    from this software without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  50  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  51  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  52  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  53  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  54  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  55  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  56  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  57  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  58  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  59  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  60  *****************************************************************************/
  61 #include <linux/etherdevice.h>
  62 #include <linux/skbuff.h>
  63 #include "iwl-trans.h"
  64 #include "mvm.h"
  65 #include "fw-api.h"
  66
  67 static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb,
  68                                    int queue, struct ieee80211_sta *sta)
  69 {
  70         struct iwl_mvm_sta *mvmsta;
  71         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  72         struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb);
  73         struct iwl_mvm_key_pn *ptk_pn;
  74         u8 tid, keyidx;
  75         u8 pn[IEEE80211_CCMP_PN_LEN];
  76         u8 *extiv;
  77
  78         /* do PN checking */
  79
  80         /* multicast and non-data only arrives on default queue */
  81         if (!ieee80211_is_data(hdr->frame_control) ||
  82             is_multicast_ether_addr(hdr->addr1))
  83                 return 0;
  84
  85         /* do not check PN for open AP */
  86         if (!(stats->flag & RX_FLAG_DECRYPTED))
  87                 return 0;
  88
  89         /*
  90          * avoid checking for default queue - we don't want to replicate
  91          * all the logic that's necessary for checking the PN on fragmented
  92          * frames, leave that to mac80211
  93          */
  94         if (queue == 0)
  95                 return 0;
  96
  97         /* if we are here - this for sure is either CCMP or GCMP */
  98         if (IS_ERR_OR_NULL(sta)) {
  99                 IWL_ERR(mvm,
 100                         "expected hw-decrypted unicast frame for station\n");
 101                 return -1;
 102         }
 103
 104         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 105
 106         extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
 107         keyidx = extiv[3] >> 6;
 108
 109         ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]);
 110         if (!ptk_pn)
 111                 return -1;
 112
 113         if (ieee80211_is_data_qos(hdr->frame_control))
 114                 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
 115         else
 116                 tid = 0;
 117
 118         /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */
 119         if (tid >= IWL_MAX_TID_COUNT)
 120                 return -1;
 121
 122         /* load pn */
 123         pn[0] = extiv[7];
 124         pn[1] = extiv[6];
 125         pn[2] = extiv[5];
 126         pn[3] = extiv[4];
 127         pn[4] = extiv[1];
 128         pn[5] = extiv[0];
 129
 130         if (memcmp(pn, ptk_pn->q[queue].pn[tid],
 131                    IEEE80211_CCMP_PN_LEN) <= 0)
 132                 return -1;
 133
 134         if (!(stats->flag & RX_FLAG_AMSDU_MORE))
 135                 memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN);
 136         stats->flag |= RX_FLAG_PN_VALIDATED;
 137
 138         return 0;
 139 }
 140
 141 /* iwl_mvm_create_skb Adds the rxb to a new skb */
 142 static void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr,
 143                                u16 len, u8 crypt_len,
 144                                struct iwl_rx_cmd_buffer *rxb)
 145 {
 146         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 147         struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
 148         unsigned int headlen, fraglen, pad_len = 0;
 149         unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 150
 151         if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) {
 152                 pad_len = 2;
 153
 154                 /*
 155                  * If the device inserted padding it means that (it thought)
 156                  * the 802.11 header wasn't a multiple of 4 bytes long. In
 157                  * this case, reserve two bytes at the start of the SKB to
 158                  * align the payload properly in case we end up copying it.
 159                  */
 160                 skb_reserve(skb, pad_len);
 161         }
 162         len -= pad_len;
 163
 164         /* If frame is small enough to fit in skb->head, pull it completely.
 165          * If not, only pull ieee80211_hdr (including crypto if present, and
 166          * an additional 8 bytes for SNAP/ethertype, see below) so that
 167          * splice() or TCP coalesce are more efficient.
 168          *
 169          * Since, in addition, ieee80211_data_to_8023() always pull in at
 170          * least 8 bytes (possibly more for mesh) we can do the same here
 171          * to save the cost of doing it later. That still doesn't pull in
 172          * the actual IP header since the typical case has a SNAP header.
 173          * If the latter changes (there are efforts in the standards group
 174          * to do so) we should revisit this and ieee80211_data_to_8023().
 175          */
 176         headlen = (len <= skb_tailroom(skb)) ? len :
 177                                                hdrlen + crypt_len + 8;
 178
 179         /* The firmware may align the packet to DWORD.
 180          * The padding is inserted after the IV.
 181          * After copying the header + IV skip the padding if
 182          * present before copying packet data.
 183          */
 184         hdrlen += crypt_len;
 185         skb_put_data(skb, hdr, hdrlen);
 186         skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
 187
 188         fraglen = len - headlen;
 189
 190         if (fraglen) {
 191                 int offset = (void *)hdr + headlen + pad_len -
 192                              rxb_addr(rxb) + rxb_offset(rxb);
 193
 194                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 195                                 fraglen, rxb->truesize);
 196         }
 197 }
 198
 199 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
 200 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
 201                                             struct napi_struct *napi,
 202                                             struct sk_buff *skb, int queue,
 203                                             struct ieee80211_sta *sta)
 204 {
 205         if (iwl_mvm_check_pn(mvm, skb, queue, sta))
 206                 kfree_skb(skb);
 207         else
 208                 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
 209 }
 210
 211 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 212                                         struct iwl_rx_mpdu_desc *desc,
 213                                         struct ieee80211_rx_status *rx_status)
 214 {
 215         int energy_a, energy_b, max_energy;
 216         u32 rate_flags = le32_to_cpu(desc->rate_n_flags);
 217
 218         energy_a = desc->energy_a;
 219         energy_a = energy_a ? -energy_a : S8_MIN;
 220         energy_b = desc->energy_b;
 221         energy_b = energy_b ? -energy_b : S8_MIN;
 222         max_energy = max(energy_a, energy_b);
 223
 224         IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
 225                         energy_a, energy_b, max_energy);
 226
 227         rx_status->signal = max_energy;
 228         rx_status->chains =
 229                 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;
 230         rx_status->chain_signal[0] = energy_a;
 231         rx_status->chain_signal[1] = energy_b;
 232         rx_status->chain_signal[2] = S8_MIN;
 233 }
 234
 235 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
 236                              struct ieee80211_rx_status *stats,
 237                              struct iwl_rx_mpdu_desc *desc, u32 pkt_flags,
 238                              int queue, u8 *crypt_len)
 239 {
 240         u16 status = le16_to_cpu(desc->status);
 241
 242         if (!ieee80211_has_protected(hdr->frame_control) ||
 243             (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 244             IWL_RX_MPDU_STATUS_SEC_NONE)
 245                 return 0;
 246
 247         /* TODO: handle packets encrypted with unknown alg */
 248
 249         switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
 250         case IWL_RX_MPDU_STATUS_SEC_CCM:
 251         case IWL_RX_MPDU_STATUS_SEC_GCM:
 252                 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
 253                 /* alg is CCM: check MIC only */
 254                 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
 255                         return -1;
 256
 257                 stats->flag |= RX_FLAG_DECRYPTED;
 258                 if (pkt_flags & FH_RSCSR_RADA_EN)
 259                         stats->flag |= RX_FLAG_MIC_STRIPPED;
 260                 *crypt_len = IEEE80211_CCMP_HDR_LEN;
 261                 return 0;
 262         case IWL_RX_MPDU_STATUS_SEC_TKIP:
 263                 /* Don't drop the frame and decrypt it in SW */
 264                 if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
 265                         return 0;
 266
 267                 *crypt_len = IEEE80211_TKIP_IV_LEN;
 268                 /* fall through if TTAK OK */
 269         case IWL_RX_MPDU_STATUS_SEC_WEP:
 270                 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
 271                         return -1;
 272
 273                 stats->flag |= RX_FLAG_DECRYPTED;
 274                 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 275                                 IWL_RX_MPDU_STATUS_SEC_WEP)
 276                         *crypt_len = IEEE80211_WEP_IV_LEN;
 277
 278                 if (pkt_flags & FH_RSCSR_RADA_EN)
 279                         stats->flag |= RX_FLAG_ICV_STRIPPED;
 280
 281                 return 0;
 282         case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
 283                 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
 284                         return -1;
 285                 stats->flag |= RX_FLAG_DECRYPTED;
 286                 return 0;
 287         default:
 288                 /* Expected in monitor (not having the keys) */
 289                 if (!mvm->monitor_on)
 290                         IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
 291         }
 292
 293         return 0;
 294 }
 295
 296 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
 297                             struct sk_buff *skb,
 298                             struct iwl_rx_mpdu_desc *desc)
 299 {
 300         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 301         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 302         u16 flags = le16_to_cpu(desc->l3l4_flags);
 303         u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
 304                           IWL_RX_L3_PROTO_POS);
 305
 306         if (mvmvif->features & NETIF_F_RXCSUM &&
 307             flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
 308             (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
 309              l3_prot == IWL_RX_L3_TYPE_IPV6 ||
 310              l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
 311                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 312 }
 313
 314 /*
 315  * returns true if a packet outside BA session is a duplicate and
 316  * should be dropped
 317  */
 318 static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue,
 319                                   struct ieee80211_rx_status *rx_status,
 320                                   struct ieee80211_hdr *hdr,
 321                                   struct iwl_rx_mpdu_desc *desc)
 322 {
 323         struct iwl_mvm_sta *mvm_sta;
 324         struct iwl_mvm_rxq_dup_data *dup_data;
 325         u8 baid, tid, sub_frame_idx;
 326
 327         if (WARN_ON(IS_ERR_OR_NULL(sta)))
 328                 return false;
 329
 330         baid = (le32_to_cpu(desc->reorder_data) &
 331                 IWL_RX_MPDU_REORDER_BAID_MASK) >>
 332                 IWL_RX_MPDU_REORDER_BAID_SHIFT;
 333
 334         if (baid != IWL_RX_REORDER_DATA_INVALID_BAID)
 335                 return false;
 336
 337         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 338         dup_data = &mvm_sta->dup_data[queue];
 339
 340         /*
 341          * Drop duplicate 802.11 retransmissions
 342          * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
 343          */
 344         if (ieee80211_is_ctl(hdr->frame_control) ||
 345             ieee80211_is_qos_nullfunc(hdr->frame_control) ||
 346             is_multicast_ether_addr(hdr->addr1)) {
 347                 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
 348                 return false;
 349         }
 350
 351         if (ieee80211_is_data_qos(hdr->frame_control))
 352                 /* frame has qos control */
 353                 tid = *ieee80211_get_qos_ctl(hdr) &
 354                         IEEE80211_QOS_CTL_TID_MASK;
 355         else
 356                 tid = IWL_MAX_TID_COUNT;
 357
 358         /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
 359         sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
 360
 361         if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
 362                      dup_data->last_seq[tid] == hdr->seq_ctrl &&
 363                      dup_data->last_sub_frame[tid] >= sub_frame_idx))
 364                 return true;
 365
 366         dup_data->last_seq[tid] = hdr->seq_ctrl;
 367         dup_data->last_sub_frame[tid] = sub_frame_idx;
 368
 369         rx_status->flag |= RX_FLAG_DUP_VALIDATED;
 370
 371         return false;
 372 }
 373
 374 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
 375                             const u8 *data, u32 count)
 376 {
 377         struct iwl_rxq_sync_cmd *cmd;
 378         u32 data_size = sizeof(*cmd) + count;
 379         int ret;
 380
 381         /* should be DWORD aligned */
 382         if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE))
 383                 return -EINVAL;
 384
 385         cmd = kzalloc(data_size, GFP_KERNEL);
 386         if (!cmd)
 387                 return -ENOMEM;
 388
 389         cmd->rxq_mask = cpu_to_le32(rxq_mask);
 390         cmd->count =  cpu_to_le32(count);
 391         cmd->flags = 0;
 392         memcpy(cmd->payload, data, count);
 393
 394         ret = iwl_mvm_send_cmd_pdu(mvm,
 395                                    WIDE_ID(DATA_PATH_GROUP,
 396                                            TRIGGER_RX_QUEUES_NOTIF_CMD),
 397                                    0, data_size, cmd);
 398
 399         kfree(cmd);
 400         return ret;
 401 }
 402
 403 /*
 404  * Returns true if sn2 - buffer_size < sn1 < sn2.
 405  * To be used only in order to compare reorder buffer head with NSSN.
 406  * We fully trust NSSN unless it is behind us due to reorder timeout.
 407  * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
 408  */
 409 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
 410 {
 411         return ieee80211_sn_less(sn1, sn2) &&
 412                !ieee80211_sn_less(sn1, sn2 - buffer_size);
 413 }
 414
 415 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
 416
 417 static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
 418                                    struct ieee80211_sta *sta,
 419                                    struct napi_struct *napi,
 420                                    struct iwl_mvm_baid_data *baid_data,
 421                                    struct iwl_mvm_reorder_buffer *reorder_buf,
 422                                    u16 nssn)
 423 {
 424         struct iwl_mvm_reorder_buf_entry *entries =
 425                 &baid_data->entries[reorder_buf->queue *
 426                                     baid_data->entries_per_queue];
 427         u16 ssn = reorder_buf->head_sn;
 428
 429         lockdep_assert_held(&reorder_buf->lock);
 430
 431         /* ignore nssn smaller than head sn - this can happen due to timeout */
 432         if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
 433                 goto set_timer;
 434
 435         while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
 436                 int index = ssn % reorder_buf->buf_size;
 437                 struct sk_buff_head *skb_list = &entries[index].e.frames;
 438                 struct sk_buff *skb;
 439
 440                 ssn = ieee80211_sn_inc(ssn);
 441
 442                 /*
 443                  * Empty the list. Will have more than one frame for A-MSDU.
 444                  * Empty list is valid as well since nssn indicates frames were
 445                  * received.
 446                  */
 447                 while ((skb = __skb_dequeue(skb_list))) {
 448                         iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
 449                                                         reorder_buf->queue,
 450                                                         sta);
 451                         reorder_buf->num_stored--;
 452                 }
 453         }
 454         reorder_buf->head_sn = nssn;
 455
 456 set_timer:
 457         if (reorder_buf->num_stored && !reorder_buf->removed) {
 458                 u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
 459
 460                 while (skb_queue_empty(&entries[index].e.frames))
 461                         index = (index + 1) % reorder_buf->buf_size;
 462                 /* modify timer to match next frame's expiration time */
 463                 mod_timer(&reorder_buf->reorder_timer,
 464                           entries[index].e.reorder_time + 1 +
 465                           RX_REORDER_BUF_TIMEOUT_MQ);
 466         } else {
 467                 del_timer(&reorder_buf->reorder_timer);
 468         }
 469 }
 470
 471 void iwl_mvm_reorder_timer_expired(struct timer_list *t)
 472 {
 473         struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer);
 474         struct iwl_mvm_baid_data *baid_data =
 475                 iwl_mvm_baid_data_from_reorder_buf(buf);
 476         struct iwl_mvm_reorder_buf_entry *entries =
 477                 &baid_data->entries[buf->queue * baid_data->entries_per_queue];
 478         int i;
 479         u16 sn = 0, index = 0;
 480         bool expired = false;
 481         bool cont = false;
 482
 483         spin_lock(&buf->lock);
 484
 485         if (!buf->num_stored || buf->removed) {
 486                 spin_unlock(&buf->lock);
 487                 return;
 488         }
 489
 490         for (i = 0; i < buf->buf_size ; i++) {
 491                 index = (buf->head_sn + i) % buf->buf_size;
 492
 493                 if (skb_queue_empty(&entries[index].e.frames)) {
 494                         /*
 495                          * If there is a hole and the next frame didn't expire
 496                          * we want to break and not advance SN
 497                          */
 498                         cont = false;
 499                         continue;
 500                 }
 501                 if (!cont &&
 502                     !time_after(jiffies, entries[index].e.reorder_time +
 503                                          RX_REORDER_BUF_TIMEOUT_MQ))
 504                         break;
 505
 506                 expired = true;
 507                 /* continue until next hole after this expired frames */
 508                 cont = true;
 509                 sn = ieee80211_sn_add(buf->head_sn, i + 1);
 510         }
 511
 512         if (expired) {
 513                 struct ieee80211_sta *sta;
 514                 struct iwl_mvm_sta *mvmsta;
 515                 u8 sta_id = baid_data->sta_id;
 516
 517                 rcu_read_lock();
 518                 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]);
 519                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
 520
 521                 /* SN is set to the last expired frame + 1 */
 522                 IWL_DEBUG_HT(buf->mvm,
 523                              "Releasing expired frames for sta %u, sn %d\n",
 524                              sta_id, sn);
 525                 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif,
 526                                                      sta, baid_data->tid);
 527                 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn);
 528                 rcu_read_unlock();
 529         } else {
 530                 /*
 531                  * If no frame expired and there are stored frames, index is now
 532                  * pointing to the first unexpired frame - modify timer
 533                  * accordingly to this frame.
 534                  */
 535                 mod_timer(&buf->reorder_timer,
 536                           entries[index].e.reorder_time +
 537                           1 + RX_REORDER_BUF_TIMEOUT_MQ);
 538         }
 539         spin_unlock(&buf->lock);
 540 }
 541
 542 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
 543                            struct iwl_mvm_delba_data *data)
 544 {
 545         struct iwl_mvm_baid_data *ba_data;
 546         struct ieee80211_sta *sta;
 547         struct iwl_mvm_reorder_buffer *reorder_buf;
 548         u8 baid = data->baid;
 549
 550         if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
 551                 return;
 552
 553         rcu_read_lock();
 554
 555         ba_data = rcu_dereference(mvm->baid_map[baid]);
 556         if (WARN_ON_ONCE(!ba_data))
 557                 goto out;
 558
 559         sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
 560         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 561                 goto out;
 562
 563         reorder_buf = &ba_data->reorder_buf[queue];
 564
 565         /* release all frames that are in the reorder buffer to the stack */
 566         spin_lock_bh(&reorder_buf->lock);
 567         iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf,
 568                                ieee80211_sn_add(reorder_buf->head_sn,
 569                                                 reorder_buf->buf_size));
 570         spin_unlock_bh(&reorder_buf->lock);
 571         del_timer_sync(&reorder_buf->reorder_timer);
 572
 573 out:
 574         rcu_read_unlock();
 575 }
 576
 577 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 578                             int queue)
 579 {
 580         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 581         struct iwl_rxq_sync_notification *notif;
 582         struct iwl_mvm_internal_rxq_notif *internal_notif;
 583
 584         notif = (void *)pkt->data;
 585         internal_notif = (void *)notif->payload;
 586
 587         if (internal_notif->sync) {
 588                 if (mvm->queue_sync_cookie != internal_notif->cookie) {
 589                         WARN_ONCE(1,
 590                                   "Received expired RX queue sync message\n");
 591                         return;
 592                 }
 593                 if (!atomic_dec_return(&mvm->queue_sync_counter))
 594                         wake_up(&mvm->rx_sync_waitq);
 595         }
 596
 597         switch (internal_notif->type) {
 598         case IWL_MVM_RXQ_EMPTY:
 599                 break;
 600         case IWL_MVM_RXQ_NOTIF_DEL_BA:
 601                 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
 602                 break;
 603         default:
 604                 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
 605         }
 606 }
 607
 608 /*
 609  * Returns true if the MPDU was buffered\dropped, false if it should be passed
 610  * to upper layer.
 611  */
 612 static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
 613                             struct napi_struct *napi,
 614                             int queue,
 615                             struct ieee80211_sta *sta,
 616                             struct sk_buff *skb,
 617                             struct iwl_rx_mpdu_desc *desc)
 618 {
 619         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 620         struct iwl_mvm_sta *mvm_sta;
 621         struct iwl_mvm_baid_data *baid_data;
 622         struct iwl_mvm_reorder_buffer *buffer;
 623         struct sk_buff *tail;
 624         u32 reorder = le32_to_cpu(desc->reorder_data);
 625         bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
 626         bool last_subframe =
 627                 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
 628         u8 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
 629         u8 sub_frame_idx = desc->amsdu_info &
 630                            IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
 631         struct iwl_mvm_reorder_buf_entry *entries;
 632         int index;
 633         u16 nssn, sn;
 634         u8 baid;
 635
 636         baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
 637                 IWL_RX_MPDU_REORDER_BAID_SHIFT;
 638
 639         /*
 640          * This also covers the case of receiving a Block Ack Request
 641          * outside a BA session; we'll pass it to mac80211 and that
 642          * then sends a delBA action frame.
 643          */
 644         if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
 645                 return false;
 646
 647         /* no sta yet */
 648         if (WARN_ONCE(IS_ERR_OR_NULL(sta),
 649                       "Got valid BAID without a valid station assigned\n"))
 650                 return false;
 651
 652         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 653
 654         /* not a data packet or a bar */
 655         if (!ieee80211_is_back_req(hdr->frame_control) &&
 656             (!ieee80211_is_data_qos(hdr->frame_control) ||
 657              is_multicast_ether_addr(hdr->addr1)))
 658                 return false;
 659
 660         if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
 661                 return false;
 662
 663         baid_data = rcu_dereference(mvm->baid_map[baid]);
 664         if (!baid_data) {
 665                 IWL_DEBUG_RX(mvm,
 666                              "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
 667                               baid, reorder);
 668                 return false;
 669         }
 670
 671         if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
 672                  "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
 673                  baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
 674                  tid))
 675                 return false;
 676
 677         nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
 678         sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
 679                 IWL_RX_MPDU_REORDER_SN_SHIFT;
 680
 681         buffer = &baid_data->reorder_buf[queue];
 682         entries = &baid_data->entries[queue * baid_data->entries_per_queue];
 683
 684         spin_lock_bh(&buffer->lock);
 685
 686         if (!buffer->valid) {
 687                 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
 688                         spin_unlock_bh(&buffer->lock);
 689                         return false;
 690                 }
 691                 buffer->valid = true;
 692         }
 693
 694         if (ieee80211_is_back_req(hdr->frame_control)) {
 695                 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
 696                 goto drop;
 697         }
 698
 699         /*
 700          * If there was a significant jump in the nssn - adjust.
 701          * If the SN is smaller than the NSSN it might need to first go into
 702          * the reorder buffer, in which case we just release up to it and the
 703          * rest of the function will take care of storing it and releasing up to
 704          * the nssn
 705          */
 706         if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
 707                                 buffer->buf_size) ||
 708             !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
 709                 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
 710
 711                 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer,
 712                                        min_sn);
 713         }
 714
 715         /* drop any oudated packets */
 716         if (ieee80211_sn_less(sn, buffer->head_sn))
 717                 goto drop;
 718
 719         /* release immediately if allowed by nssn and no stored frames */
 720         if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
 721                 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
 722                                        buffer->buf_size) &&
 723                    (!amsdu || last_subframe))
 724                         buffer->head_sn = nssn;
 725                 /* No need to update AMSDU last SN - we are moving the head */
 726                 spin_unlock_bh(&buffer->lock);
 727                 return false;
 728         }
 729
 730         /*
 731          * release immediately if there are no stored frames, and the sn is
 732          * equal to the head.
 733          * This can happen due to reorder timer, where NSSN is behind head_sn.
 734          * When we released everything, and we got the next frame in the
 735          * sequence, according to the NSSN we can't release immediately,
 736          * while technically there is no hole and we can move forward.
 737          */
 738         if (!buffer->num_stored && sn == buffer->head_sn) {
 739                 if (!amsdu || last_subframe)
 740                         buffer->head_sn = ieee80211_sn_inc(buffer->head_sn);
 741                 /* No need to update AMSDU last SN - we are moving the head */
 742                 spin_unlock_bh(&buffer->lock);
 743                 return false;
 744         }
 745
 746         index = sn % buffer->buf_size;
 747
 748         /*
 749          * Check if we already stored this frame
 750          * As AMSDU is either received or not as whole, logic is simple:
 751          * If we have frames in that position in the buffer and the last frame
 752          * originated from AMSDU had a different SN then it is a retransmission.
 753          * If it is the same SN then if the subframe index is incrementing it
 754          * is the same AMSDU - otherwise it is a retransmission.
 755          */
 756         tail = skb_peek_tail(&entries[index].e.frames);
 757         if (tail && !amsdu)
 758                 goto drop;
 759         else if (tail && (sn != buffer->last_amsdu ||
 760                           buffer->last_sub_index >= sub_frame_idx))
 761                 goto drop;
 762
 763         /* put in reorder buffer */
 764         __skb_queue_tail(&entries[index].e.frames, skb);
 765         buffer->num_stored++;
 766         entries[index].e.reorder_time = jiffies;
 767
 768         if (amsdu) {
 769                 buffer->last_amsdu = sn;
 770                 buffer->last_sub_index = sub_frame_idx;
 771         }
 772
 773         /*
 774          * We cannot trust NSSN for AMSDU sub-frames that are not the last.
 775          * The reason is that NSSN advances on the first sub-frame, and may
 776          * cause the reorder buffer to advance before all the sub-frames arrive.
 777          * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
 778          * SN 1. NSSN for first sub frame will be 3 with the result of driver
 779          * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
 780          * already ahead and it will be dropped.
 781          * If the last sub-frame is not on this queue - we will get frame
 782          * release notification with up to date NSSN.
 783          */
 784         if (!amsdu || last_subframe)
 785                 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
 786
 787         spin_unlock_bh(&buffer->lock);
 788         return true;
 789
 790 drop:
 791         kfree_skb(skb);
 792         spin_unlock_bh(&buffer->lock);
 793         return true;
 794 }
 795
 796 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
 797                                     u32 reorder_data, u8 baid)
 798 {
 799         unsigned long now = jiffies;
 800         unsigned long timeout;
 801         struct iwl_mvm_baid_data *data;
 802
 803         rcu_read_lock();
 804
 805         data = rcu_dereference(mvm->baid_map[baid]);
 806         if (!data) {
 807                 IWL_DEBUG_RX(mvm,
 808                              "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
 809                               baid, reorder_data);
 810                 goto out;
 811         }
 812
 813         if (!data->timeout)
 814                 goto out;
 815
 816         timeout = data->timeout;
 817         /*
 818          * Do not update last rx all the time to avoid cache bouncing
 819          * between the rx queues.
 820          * Update it every timeout. Worst case is the session will
 821          * expire after ~ 2 * timeout, which doesn't matter that much.
 822          */
 823         if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
 824                 /* Update is atomic */
 825                 data->last_rx = now;
 826
 827 out:
 828         rcu_read_unlock();
 829 }
 830
 831 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 832                         struct iwl_rx_cmd_buffer *rxb, int queue)
 833 {
 834         struct ieee80211_rx_status *rx_status;
 835         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 836         struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
 837         struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc));
 838         u32 len = le16_to_cpu(desc->mpdu_len);
 839         u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
 840         u16 phy_info = le16_to_cpu(desc->phy_info);
 841         struct ieee80211_sta *sta = NULL;
 842         struct sk_buff *skb;
 843         u8 crypt_len = 0;
 844
 845         if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 846                 return;
 847
 848         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 849          * ieee80211_hdr pulled.
 850          */
 851         skb = alloc_skb(128, GFP_ATOMIC);
 852         if (!skb) {
 853                 IWL_ERR(mvm, "alloc_skb failed\n");
 854                 return;
 855         }
 856
 857         rx_status = IEEE80211_SKB_RXCB(skb);
 858
 859         if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc,
 860                               le32_to_cpu(pkt->len_n_flags), queue,
 861                               &crypt_len)) {
 862                 kfree_skb(skb);
 863                 return;
 864         }
 865
 866         /*
 867          * Keep packets with CRC errors (and with overrun) for monitor mode
 868          * (otherwise the firmware discards them) but mark them as bad.
 869          */
 870         if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
 871             !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
 872                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
 873                              le16_to_cpu(desc->status));
 874                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 875         }
 876         /* set the preamble flag if appropriate */
 877         if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
 878                 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
 879
 880         if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
 881                 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
 882                 /* TSF as indicated by the firmware is at INA time */
 883                 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
 884         }
 885         rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
 886         rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ :
 887                                                NL80211_BAND_2GHZ;
 888         rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
 889                                                          rx_status->band);
 890         iwl_mvm_get_signal_strength(mvm, desc, rx_status);
 891
 892         /* update aggregation data for monitor sake on default queue */
 893         if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
 894                 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
 895
 896                 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
 897                 rx_status->ampdu_reference = mvm->ampdu_ref;
 898                 /* toggle is switched whenever new aggregation starts */
 899                 if (toggle_bit != mvm->ampdu_toggle) {
 900                         mvm->ampdu_ref++;
 901                         mvm->ampdu_toggle = toggle_bit;
 902                 }
 903         }
 904
 905         rcu_read_lock();
 906
 907         if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
 908                 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
 909
 910                 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
 911                         sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
 912                         if (IS_ERR(sta))
 913                                 sta = NULL;
 914                 }
 915         } else if (!is_multicast_ether_addr(hdr->addr2)) {
 916                 /*
 917                  * This is fine since we prevent two stations with the same
 918                  * address from being added.
 919                  */
 920                 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
 921         }
 922
 923         if (sta) {
 924                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 925                 struct ieee80211_vif *tx_blocked_vif =
 926                         rcu_dereference(mvm->csa_tx_blocked_vif);
 927                 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
 928                                IWL_RX_MPDU_REORDER_BAID_MASK) >>
 929                                IWL_RX_MPDU_REORDER_BAID_SHIFT);
 930
 931                 /*
 932                  * We have tx blocked stations (with CS bit). If we heard
 933                  * frames from a blocked station on a new channel we can
 934                  * TX to it again.
 935                  */
 936                 if (unlikely(tx_blocked_vif) &&
 937                     tx_blocked_vif == mvmsta->vif) {
 938                         struct iwl_mvm_vif *mvmvif =
 939                                 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
 940
 941                         if (mvmvif->csa_target_freq == rx_status->freq)
 942                                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
 943                                                                  false);
 944                 }
 945
 946                 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
 947
 948                 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
 949                     ieee80211_is_beacon(hdr->frame_control)) {
 950                         struct iwl_fw_dbg_trigger_tlv *trig;
 951                         struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
 952                         bool trig_check;
 953                         s32 rssi;
 954
 955                         trig = iwl_fw_dbg_get_trigger(mvm->fw,
 956                                                       FW_DBG_TRIGGER_RSSI);
 957                         rssi_trig = (void *)trig->data;
 958                         rssi = le32_to_cpu(rssi_trig->rssi);
 959
 960                         trig_check =
 961                                 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
 962                                                               ieee80211_vif_to_wdev(mvmsta->vif),
 963                                                               trig);
 964                         if (trig_check && rx_status->signal < rssi)
 965                                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
 966                                                         NULL);
 967                 }
 968
 969                 if (ieee80211_is_data(hdr->frame_control))
 970                         iwl_mvm_rx_csum(sta, skb, desc);
 971
 972                 if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) {
 973                         kfree_skb(skb);
 974                         goto out;
 975                 }
 976
 977                 /*
 978                  * Our hardware de-aggregates AMSDUs but copies the mac header
 979                  * as it to the de-aggregated MPDUs. We need to turn off the
 980                  * AMSDU bit in the QoS control ourselves.
 981                  * In addition, HW reverses addr3 and addr4 - reverse it back.
 982                  */
 983                 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
 984                     !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
 985                         int i;
 986                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 987                         u8 mac_addr[ETH_ALEN];
 988
 989                         *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 990
 991                         for (i = 0; i < ETH_ALEN; i++)
 992                                 mac_addr[i] = hdr->addr3[ETH_ALEN - i - 1];
 993                         ether_addr_copy(hdr->addr3, mac_addr);
 994
 995                         if (ieee80211_has_a4(hdr->frame_control)) {
 996                                 for (i = 0; i < ETH_ALEN; i++)
 997                                         mac_addr[i] =
 998                                                 hdr->addr4[ETH_ALEN - i - 1];
 999                                 ether_addr_copy(hdr->addr4, mac_addr);
1000                         }
1001                 }
1002                 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
1003                         u32 reorder_data = le32_to_cpu(desc->reorder_data);
1004
1005                         iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
1006                 }
1007         }
1008
1009         /* Set up the HT phy flags */
1010         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1011         case RATE_MCS_CHAN_WIDTH_20:
1012                 break;
1013         case RATE_MCS_CHAN_WIDTH_40:
1014                 rx_status->bw = RATE_INFO_BW_40;
1015                 break;
1016         case RATE_MCS_CHAN_WIDTH_80:
1017                 rx_status->bw = RATE_INFO_BW_80;
1018                 break;
1019         case RATE_MCS_CHAN_WIDTH_160:
1020                 rx_status->bw = RATE_INFO_BW_160;
1021                 break;
1022         }
1023         if (rate_n_flags & RATE_MCS_SGI_MSK)
1024                 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1025         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1026                 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
1027         if (rate_n_flags & RATE_MCS_LDPC_MSK)
1028                 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
1029         if (rate_n_flags & RATE_MCS_HT_MSK) {
1030                 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1031                                 RATE_MCS_STBC_POS;
1032                 rx_status->encoding = RX_ENC_HT;
1033                 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1034                 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1035         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1036                 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1037                                 RATE_MCS_STBC_POS;
1038                 rx_status->nss =
1039                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1040                                                 RATE_VHT_MCS_NSS_POS) + 1;
1041                 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1042                 rx_status->encoding = RX_ENC_VHT;
1043                 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1044                 if (rate_n_flags & RATE_MCS_BF_MSK)
1045                         rx_status->enc_flags |= RX_ENC_FLAG_BF;
1046         } else {
1047                 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1048                                                                rx_status->band);
1049
1050                 if (WARN(rate < 0 || rate > 0xFF,
1051                          "Invalid rate flags 0x%x, band %d,\n",
1052                          rate_n_flags, rx_status->band)) {
1053                         kfree_skb(skb);
1054                         goto out;
1055                 }
1056                 rx_status->rate_idx = rate;
1057
1058         }
1059
1060         /* management stuff on default queue */
1061         if (!queue) {
1062                 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
1063                               ieee80211_is_probe_resp(hdr->frame_control)) &&
1064                              mvm->sched_scan_pass_all ==
1065                              SCHED_SCAN_PASS_ALL_ENABLED))
1066                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
1067
1068                 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
1069                              ieee80211_is_probe_resp(hdr->frame_control)))
1070                         rx_status->boottime_ns = ktime_get_boot_ns();
1071         }
1072
1073         iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb);
1074         if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
1075                 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
1076 out:
1077         rcu_read_unlock();
1078 }
1079
1080 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
1081                               struct iwl_rx_cmd_buffer *rxb, int queue)
1082 {
1083         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1084         struct iwl_frame_release *release = (void *)pkt->data;
1085         struct ieee80211_sta *sta;
1086         struct iwl_mvm_reorder_buffer *reorder_buf;
1087         struct iwl_mvm_baid_data *ba_data;
1088
1089         int baid = release->baid;
1090
1091         IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
1092                      release->baid, le16_to_cpu(release->nssn));
1093
1094         if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1095                 return;
1096
1097         rcu_read_lock();
1098
1099         ba_data = rcu_dereference(mvm->baid_map[baid]);
1100         if (WARN_ON_ONCE(!ba_data))
1101                 goto out;
1102
1103         sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
1104         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1105                 goto out;
1106
1107         reorder_buf = &ba_data->reorder_buf[queue];
1108
1109         spin_lock_bh(&reorder_buf->lock);
1110         iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf,
1111                                le16_to_cpu(release->nssn));
1112         spin_unlock_bh(&reorder_buf->lock);
1113
1114 out:
1115         rcu_read_unlock();
1116 }