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