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 void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr,
 145                                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         skb_put_data(skb, hdr, hdrlen);
 188         skb_put_data(skb, (u8 *)hdr + hdrlen + pad_len, headlen - hdrlen);
 189
 190         fraglen = len - headlen;
 191
 192         if (fraglen) {
 193                 int offset = (void *)hdr + headlen + pad_len -
 194                              rxb_addr(rxb) + rxb_offset(rxb);
 195
 196                 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
 197                                 fraglen, rxb->truesize);
 198         }
 199 }
 200
 201 /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */
 202 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
 203                                             struct napi_struct *napi,
 204                                             struct sk_buff *skb, int queue,
 205                                             struct ieee80211_sta *sta)
 206 {
 207         if (iwl_mvm_check_pn(mvm, skb, queue, sta))
 208                 kfree_skb(skb);
 209         else
 210                 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
 211 }
 212
 213 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 214                                         struct iwl_rx_mpdu_desc *desc,
 215                                         struct ieee80211_rx_status *rx_status)
 216 {
 217         int energy_a, energy_b, max_energy;
 218         u32 rate_flags = le32_to_cpu(desc->rate_n_flags);
 219
 220         energy_a = desc->energy_a;
 221         energy_a = energy_a ? -energy_a : S8_MIN;
 222         energy_b = desc->energy_b;
 223         energy_b = energy_b ? -energy_b : S8_MIN;
 224         max_energy = max(energy_a, energy_b);
 225
 226         IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n",
 227                         energy_a, energy_b, max_energy);
 228
 229         rx_status->signal = max_energy;
 230         rx_status->chains =
 231                 (rate_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;
 232         rx_status->chain_signal[0] = energy_a;
 233         rx_status->chain_signal[1] = energy_b;
 234         rx_status->chain_signal[2] = S8_MIN;
 235 }
 236
 237 static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
 238                              struct ieee80211_rx_status *stats,
 239                              struct iwl_rx_mpdu_desc *desc, u32 pkt_flags,
 240                              int queue, u8 *crypt_len)
 241 {
 242         u16 status = le16_to_cpu(desc->status);
 243
 244         if (!ieee80211_has_protected(hdr->frame_control) ||
 245             (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 246             IWL_RX_MPDU_STATUS_SEC_NONE)
 247                 return 0;
 248
 249         /* TODO: handle packets encrypted with unknown alg */
 250
 251         switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
 252         case IWL_RX_MPDU_STATUS_SEC_CCM:
 253         case IWL_RX_MPDU_STATUS_SEC_GCM:
 254                 BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN);
 255                 /* alg is CCM: check MIC only */
 256                 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
 257                         return -1;
 258
 259                 stats->flag |= RX_FLAG_DECRYPTED;
 260                 if (pkt_flags & FH_RSCSR_RADA_EN)
 261                         stats->flag |= RX_FLAG_MIC_STRIPPED;
 262                 *crypt_len = IEEE80211_CCMP_HDR_LEN;
 263                 return 0;
 264         case IWL_RX_MPDU_STATUS_SEC_TKIP:
 265                 /* Don't drop the frame and decrypt it in SW */
 266                 if (!fw_has_api(&mvm->fw->ucode_capa,
 267                                 IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
 268                     !(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
 269                         return 0;
 270
 271                 *crypt_len = IEEE80211_TKIP_IV_LEN;
 272                 /* fall through if TTAK OK */
 273         case IWL_RX_MPDU_STATUS_SEC_WEP:
 274                 if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
 275                         return -1;
 276
 277                 stats->flag |= RX_FLAG_DECRYPTED;
 278                 if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
 279                                 IWL_RX_MPDU_STATUS_SEC_WEP)
 280                         *crypt_len = IEEE80211_WEP_IV_LEN;
 281
 282                 if (pkt_flags & FH_RSCSR_RADA_EN)
 283                         stats->flag |= RX_FLAG_ICV_STRIPPED;
 284
 285                 return 0;
 286         case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
 287                 if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
 288                         return -1;
 289                 stats->flag |= RX_FLAG_DECRYPTED;
 290                 return 0;
 291         default:
 292                 /* Expected in monitor (not having the keys) */
 293                 if (!mvm->monitor_on)
 294                         IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
 295         }
 296
 297         return 0;
 298 }
 299
 300 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
 301                             struct sk_buff *skb,
 302                             struct iwl_rx_mpdu_desc *desc)
 303 {
 304         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 305         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 306         u16 flags = le16_to_cpu(desc->l3l4_flags);
 307         u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >>
 308                           IWL_RX_L3_PROTO_POS);
 309
 310         if (mvmvif->features & NETIF_F_RXCSUM &&
 311             flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK &&
 312             (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK ||
 313              l3_prot == IWL_RX_L3_TYPE_IPV6 ||
 314              l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG))
 315                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 316 }
 317
 318 /*
 319  * returns true if a packet is a duplicate and should be dropped.
 320  * Updates AMSDU PN tracking info
 321  */
 322 static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue,
 323                            struct ieee80211_rx_status *rx_status,
 324                            struct ieee80211_hdr *hdr,
 325                            struct iwl_rx_mpdu_desc *desc)
 326 {
 327         struct iwl_mvm_sta *mvm_sta;
 328         struct iwl_mvm_rxq_dup_data *dup_data;
 329         u8 tid, sub_frame_idx;
 330
 331         if (WARN_ON(IS_ERR_OR_NULL(sta)))
 332                 return false;
 333
 334         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 335         dup_data = &mvm_sta->dup_data[queue];
 336
 337         /*
 338          * Drop duplicate 802.11 retransmissions
 339          * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
 340          */
 341         if (ieee80211_is_ctl(hdr->frame_control) ||
 342             ieee80211_is_qos_nullfunc(hdr->frame_control) ||
 343             is_multicast_ether_addr(hdr->addr1)) {
 344                 rx_status->flag |= RX_FLAG_DUP_VALIDATED;
 345                 return false;
 346         }
 347
 348         if (ieee80211_is_data_qos(hdr->frame_control))
 349                 /* frame has qos control */
 350                 tid = *ieee80211_get_qos_ctl(hdr) &
 351                         IEEE80211_QOS_CTL_TID_MASK;
 352         else
 353                 tid = IWL_MAX_TID_COUNT;
 354
 355         /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */
 356         sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
 357
 358         if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
 359                      dup_data->last_seq[tid] == hdr->seq_ctrl &&
 360                      dup_data->last_sub_frame[tid] >= sub_frame_idx))
 361                 return true;
 362
 363         /* Allow same PN as the first subframe for following sub frames */
 364         if (dup_data->last_seq[tid] == hdr->seq_ctrl &&
 365             sub_frame_idx > dup_data->last_sub_frame[tid] &&
 366             desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU)
 367                 rx_status->flag |= RX_FLAG_ALLOW_SAME_PN;
 368
 369         dup_data->last_seq[tid] = hdr->seq_ctrl;
 370         dup_data->last_sub_frame[tid] = sub_frame_idx;
 371
 372         rx_status->flag |= RX_FLAG_DUP_VALIDATED;
 373
 374         return false;
 375 }
 376
 377 int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask,
 378                             const u8 *data, u32 count)
 379 {
 380         struct iwl_rxq_sync_cmd *cmd;
 381         u32 data_size = sizeof(*cmd) + count;
 382         int ret;
 383
 384         /* should be DWORD aligned */
 385         if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE))
 386                 return -EINVAL;
 387
 388         cmd = kzalloc(data_size, GFP_KERNEL);
 389         if (!cmd)
 390                 return -ENOMEM;
 391
 392         cmd->rxq_mask = cpu_to_le32(rxq_mask);
 393         cmd->count =  cpu_to_le32(count);
 394         cmd->flags = 0;
 395         memcpy(cmd->payload, data, count);
 396
 397         ret = iwl_mvm_send_cmd_pdu(mvm,
 398                                    WIDE_ID(DATA_PATH_GROUP,
 399                                            TRIGGER_RX_QUEUES_NOTIF_CMD),
 400                                    0, data_size, cmd);
 401
 402         kfree(cmd);
 403         return ret;
 404 }
 405
 406 /*
 407  * Returns true if sn2 - buffer_size < sn1 < sn2.
 408  * To be used only in order to compare reorder buffer head with NSSN.
 409  * We fully trust NSSN unless it is behind us due to reorder timeout.
 410  * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
 411  */
 412 static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
 413 {
 414         return ieee80211_sn_less(sn1, sn2) &&
 415                !ieee80211_sn_less(sn1, sn2 - buffer_size);
 416 }
 417
 418 #define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
 419
 420 static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
 421                                    struct ieee80211_sta *sta,
 422                                    struct napi_struct *napi,
 423                                    struct iwl_mvm_baid_data *baid_data,
 424                                    struct iwl_mvm_reorder_buffer *reorder_buf,
 425                                    u16 nssn)
 426 {
 427         struct iwl_mvm_reorder_buf_entry *entries =
 428                 &baid_data->entries[reorder_buf->queue *
 429                                     baid_data->entries_per_queue];
 430         u16 ssn = reorder_buf->head_sn;
 431
 432         lockdep_assert_held(&reorder_buf->lock);
 433
 434         /* ignore nssn smaller than head sn - this can happen due to timeout */
 435         if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
 436                 goto set_timer;
 437
 438         while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
 439                 int index = ssn % reorder_buf->buf_size;
 440                 struct sk_buff_head *skb_list = &entries[index].e.frames;
 441                 struct sk_buff *skb;
 442
 443                 ssn = ieee80211_sn_inc(ssn);
 444
 445                 /*
 446                  * Empty the list. Will have more than one frame for A-MSDU.
 447                  * Empty list is valid as well since nssn indicates frames were
 448                  * received.
 449                  */
 450                 while ((skb = __skb_dequeue(skb_list))) {
 451                         iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
 452                                                         reorder_buf->queue,
 453                                                         sta);
 454                         reorder_buf->num_stored--;
 455                 }
 456         }
 457         reorder_buf->head_sn = nssn;
 458
 459 set_timer:
 460         if (reorder_buf->num_stored && !reorder_buf->removed) {
 461                 u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
 462
 463                 while (skb_queue_empty(&entries[index].e.frames))
 464                         index = (index + 1) % reorder_buf->buf_size;
 465                 /* modify timer to match next frame's expiration time */
 466                 mod_timer(&reorder_buf->reorder_timer,
 467                           entries[index].e.reorder_time + 1 +
 468                           RX_REORDER_BUF_TIMEOUT_MQ);
 469         } else {
 470                 del_timer(&reorder_buf->reorder_timer);
 471         }
 472 }
 473
 474 void iwl_mvm_reorder_timer_expired(struct timer_list *t)
 475 {
 476         struct iwl_mvm_reorder_buffer *buf = from_timer(buf, t, reorder_timer);
 477         struct iwl_mvm_baid_data *baid_data =
 478                 iwl_mvm_baid_data_from_reorder_buf(buf);
 479         struct iwl_mvm_reorder_buf_entry *entries =
 480                 &baid_data->entries[buf->queue * baid_data->entries_per_queue];
 481         int i;
 482         u16 sn = 0, index = 0;
 483         bool expired = false;
 484         bool cont = false;
 485
 486         spin_lock(&buf->lock);
 487
 488         if (!buf->num_stored || buf->removed) {
 489                 spin_unlock(&buf->lock);
 490                 return;
 491         }
 492
 493         for (i = 0; i < buf->buf_size ; i++) {
 494                 index = (buf->head_sn + i) % buf->buf_size;
 495
 496                 if (skb_queue_empty(&entries[index].e.frames)) {
 497                         /*
 498                          * If there is a hole and the next frame didn't expire
 499                          * we want to break and not advance SN
 500                          */
 501                         cont = false;
 502                         continue;
 503                 }
 504                 if (!cont &&
 505                     !time_after(jiffies, entries[index].e.reorder_time +
 506                                          RX_REORDER_BUF_TIMEOUT_MQ))
 507                         break;
 508
 509                 expired = true;
 510                 /* continue until next hole after this expired frames */
 511                 cont = true;
 512                 sn = ieee80211_sn_add(buf->head_sn, i + 1);
 513         }
 514
 515         if (expired) {
 516                 struct ieee80211_sta *sta;
 517                 struct iwl_mvm_sta *mvmsta;
 518                 u8 sta_id = baid_data->sta_id;
 519
 520                 rcu_read_lock();
 521                 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[sta_id]);
 522                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
 523
 524                 /* SN is set to the last expired frame + 1 */
 525                 IWL_DEBUG_HT(buf->mvm,
 526                              "Releasing expired frames for sta %u, sn %d\n",
 527                              sta_id, sn);
 528                 iwl_mvm_event_frame_timeout_callback(buf->mvm, mvmsta->vif,
 529                                                      sta, baid_data->tid);
 530                 iwl_mvm_release_frames(buf->mvm, sta, NULL, baid_data, buf, sn);
 531                 rcu_read_unlock();
 532         } else {
 533                 /*
 534                  * If no frame expired and there are stored frames, index is now
 535                  * pointing to the first unexpired frame - modify timer
 536                  * accordingly to this frame.
 537                  */
 538                 mod_timer(&buf->reorder_timer,
 539                           entries[index].e.reorder_time +
 540                           1 + RX_REORDER_BUF_TIMEOUT_MQ);
 541         }
 542         spin_unlock(&buf->lock);
 543 }
 544
 545 static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
 546                            struct iwl_mvm_delba_data *data)
 547 {
 548         struct iwl_mvm_baid_data *ba_data;
 549         struct ieee80211_sta *sta;
 550         struct iwl_mvm_reorder_buffer *reorder_buf;
 551         u8 baid = data->baid;
 552
 553         if (WARN_ONCE(baid >= IWL_MAX_BAID, "invalid BAID: %x\n", baid))
 554                 return;
 555
 556         rcu_read_lock();
 557
 558         ba_data = rcu_dereference(mvm->baid_map[baid]);
 559         if (WARN_ON_ONCE(!ba_data))
 560                 goto out;
 561
 562         sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
 563         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 564                 goto out;
 565
 566         reorder_buf = &ba_data->reorder_buf[queue];
 567
 568         /* release all frames that are in the reorder buffer to the stack */
 569         spin_lock_bh(&reorder_buf->lock);
 570         iwl_mvm_release_frames(mvm, sta, NULL, ba_data, reorder_buf,
 571                                ieee80211_sn_add(reorder_buf->head_sn,
 572                                                 reorder_buf->buf_size));
 573         spin_unlock_bh(&reorder_buf->lock);
 574         del_timer_sync(&reorder_buf->reorder_timer);
 575
 576 out:
 577         rcu_read_unlock();
 578 }
 579
 580 void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 581                             int queue)
 582 {
 583         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 584         struct iwl_rxq_sync_notification *notif;
 585         struct iwl_mvm_internal_rxq_notif *internal_notif;
 586
 587         notif = (void *)pkt->data;
 588         internal_notif = (void *)notif->payload;
 589
 590         if (internal_notif->sync) {
 591                 if (mvm->queue_sync_cookie != internal_notif->cookie) {
 592                         WARN_ONCE(1,
 593                                   "Received expired RX queue sync message\n");
 594                         return;
 595                 }
 596                 if (!atomic_dec_return(&mvm->queue_sync_counter))
 597                         wake_up(&mvm->rx_sync_waitq);
 598         }
 599
 600         switch (internal_notif->type) {
 601         case IWL_MVM_RXQ_EMPTY:
 602                 break;
 603         case IWL_MVM_RXQ_NOTIF_DEL_BA:
 604                 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
 605                 break;
 606         default:
 607                 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
 608         }
 609 }
 610
 611 /*
 612  * Returns true if the MPDU was buffered\dropped, false if it should be passed
 613  * to upper layer.
 614  */
 615 static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
 616                             struct napi_struct *napi,
 617                             int queue,
 618                             struct ieee80211_sta *sta,
 619                             struct sk_buff *skb,
 620                             struct iwl_rx_mpdu_desc *desc)
 621 {
 622         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 623         struct iwl_mvm_sta *mvm_sta;
 624         struct iwl_mvm_baid_data *baid_data;
 625         struct iwl_mvm_reorder_buffer *buffer;
 626         struct sk_buff *tail;
 627         u32 reorder = le32_to_cpu(desc->reorder_data);
 628         bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
 629         bool last_subframe =
 630                 desc->amsdu_info & IWL_RX_MPDU_AMSDU_LAST_SUBFRAME;
 631         u8 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
 632         u8 sub_frame_idx = desc->amsdu_info &
 633                            IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
 634         struct iwl_mvm_reorder_buf_entry *entries;
 635         int index;
 636         u16 nssn, sn;
 637         u8 baid;
 638
 639         baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
 640                 IWL_RX_MPDU_REORDER_BAID_SHIFT;
 641
 642         /*
 643          * This also covers the case of receiving a Block Ack Request
 644          * outside a BA session; we'll pass it to mac80211 and that
 645          * then sends a delBA action frame.
 646          */
 647         if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
 648                 return false;
 649
 650         /* no sta yet */
 651         if (WARN_ONCE(IS_ERR_OR_NULL(sta),
 652                       "Got valid BAID without a valid station assigned\n"))
 653                 return false;
 654
 655         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 656
 657         /* not a data packet or a bar */
 658         if (!ieee80211_is_back_req(hdr->frame_control) &&
 659             (!ieee80211_is_data_qos(hdr->frame_control) ||
 660              is_multicast_ether_addr(hdr->addr1)))
 661                 return false;
 662
 663         if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
 664                 return false;
 665
 666         baid_data = rcu_dereference(mvm->baid_map[baid]);
 667         if (!baid_data) {
 668                 IWL_DEBUG_RX(mvm,
 669                              "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
 670                               baid, reorder);
 671                 return false;
 672         }
 673
 674         if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
 675                  "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
 676                  baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
 677                  tid))
 678                 return false;
 679
 680         nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
 681         sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
 682                 IWL_RX_MPDU_REORDER_SN_SHIFT;
 683
 684         buffer = &baid_data->reorder_buf[queue];
 685         entries = &baid_data->entries[queue * baid_data->entries_per_queue];
 686
 687         spin_lock_bh(&buffer->lock);
 688
 689         if (!buffer->valid) {
 690                 if (reorder & IWL_RX_MPDU_REORDER_BA_OLD_SN) {
 691                         spin_unlock_bh(&buffer->lock);
 692                         return false;
 693                 }
 694                 buffer->valid = true;
 695         }
 696
 697         if (ieee80211_is_back_req(hdr->frame_control)) {
 698                 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
 699                 goto drop;
 700         }
 701
 702         /*
 703          * If there was a significant jump in the nssn - adjust.
 704          * If the SN is smaller than the NSSN it might need to first go into
 705          * the reorder buffer, in which case we just release up to it and the
 706          * rest of the function will take care of storing it and releasing up to
 707          * the nssn
 708          */
 709         if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
 710                                 buffer->buf_size) ||
 711             !ieee80211_sn_less(sn, buffer->head_sn + buffer->buf_size)) {
 712                 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
 713
 714                 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer,
 715                                        min_sn);
 716         }
 717
 718         /* drop any oudated packets */
 719         if (ieee80211_sn_less(sn, buffer->head_sn))
 720                 goto drop;
 721
 722         /* release immediately if allowed by nssn and no stored frames */
 723         if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
 724                 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
 725                                        buffer->buf_size) &&
 726                    (!amsdu || last_subframe))
 727                         buffer->head_sn = nssn;
 728                 /* No need to update AMSDU last SN - we are moving the head */
 729                 spin_unlock_bh(&buffer->lock);
 730                 return false;
 731         }
 732
 733         /*
 734          * release immediately if there are no stored frames, and the sn is
 735          * equal to the head.
 736          * This can happen due to reorder timer, where NSSN is behind head_sn.
 737          * When we released everything, and we got the next frame in the
 738          * sequence, according to the NSSN we can't release immediately,
 739          * while technically there is no hole and we can move forward.
 740          */
 741         if (!buffer->num_stored && sn == buffer->head_sn) {
 742                 if (!amsdu || last_subframe)
 743                         buffer->head_sn = ieee80211_sn_inc(buffer->head_sn);
 744                 /* No need to update AMSDU last SN - we are moving the head */
 745                 spin_unlock_bh(&buffer->lock);
 746                 return false;
 747         }
 748
 749         index = sn % buffer->buf_size;
 750
 751         /*
 752          * Check if we already stored this frame
 753          * As AMSDU is either received or not as whole, logic is simple:
 754          * If we have frames in that position in the buffer and the last frame
 755          * originated from AMSDU had a different SN then it is a retransmission.
 756          * If it is the same SN then if the subframe index is incrementing it
 757          * is the same AMSDU - otherwise it is a retransmission.
 758          */
 759         tail = skb_peek_tail(&entries[index].e.frames);
 760         if (tail && !amsdu)
 761                 goto drop;
 762         else if (tail && (sn != buffer->last_amsdu ||
 763                           buffer->last_sub_index >= sub_frame_idx))
 764                 goto drop;
 765
 766         /* put in reorder buffer */
 767         __skb_queue_tail(&entries[index].e.frames, skb);
 768         buffer->num_stored++;
 769         entries[index].e.reorder_time = jiffies;
 770
 771         if (amsdu) {
 772                 buffer->last_amsdu = sn;
 773                 buffer->last_sub_index = sub_frame_idx;
 774         }
 775
 776         /*
 777          * We cannot trust NSSN for AMSDU sub-frames that are not the last.
 778          * The reason is that NSSN advances on the first sub-frame, and may
 779          * cause the reorder buffer to advance before all the sub-frames arrive.
 780          * Example: reorder buffer contains SN 0 & 2, and we receive AMSDU with
 781          * SN 1. NSSN for first sub frame will be 3 with the result of driver
 782          * releasing SN 0,1, 2. When sub-frame 1 arrives - reorder buffer is
 783          * already ahead and it will be dropped.
 784          * If the last sub-frame is not on this queue - we will get frame
 785          * release notification with up to date NSSN.
 786          */
 787         if (!amsdu || last_subframe)
 788                 iwl_mvm_release_frames(mvm, sta, napi, baid_data, buffer, nssn);
 789
 790         spin_unlock_bh(&buffer->lock);
 791         return true;
 792
 793 drop:
 794         kfree_skb(skb);
 795         spin_unlock_bh(&buffer->lock);
 796         return true;
 797 }
 798
 799 static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm,
 800                                     u32 reorder_data, u8 baid)
 801 {
 802         unsigned long now = jiffies;
 803         unsigned long timeout;
 804         struct iwl_mvm_baid_data *data;
 805
 806         rcu_read_lock();
 807
 808         data = rcu_dereference(mvm->baid_map[baid]);
 809         if (!data) {
 810                 IWL_DEBUG_RX(mvm,
 811                              "Got valid BAID but no baid allocated, bypass the re-ordering buffer. Baid %d reorder 0x%x\n",
 812                               baid, reorder_data);
 813                 goto out;
 814         }
 815
 816         if (!data->timeout)
 817                 goto out;
 818
 819         timeout = data->timeout;
 820         /*
 821          * Do not update last rx all the time to avoid cache bouncing
 822          * between the rx queues.
 823          * Update it every timeout. Worst case is the session will
 824          * expire after ~ 2 * timeout, which doesn't matter that much.
 825          */
 826         if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
 827                 /* Update is atomic */
 828                 data->last_rx = now;
 829
 830 out:
 831         rcu_read_unlock();
 832 }
 833
 834 void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 835                         struct iwl_rx_cmd_buffer *rxb, int queue)
 836 {
 837         struct ieee80211_rx_status *rx_status;
 838         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 839         struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
 840         struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc));
 841         u32 len = le16_to_cpu(desc->mpdu_len);
 842         u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
 843         u16 phy_info = le16_to_cpu(desc->phy_info);
 844         struct ieee80211_sta *sta = NULL;
 845         struct sk_buff *skb;
 846         u8 crypt_len = 0;
 847
 848         if (unlikely(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 849                 return;
 850
 851         /* Dont use dev_alloc_skb(), we'll have enough headroom once
 852          * ieee80211_hdr pulled.
 853          */
 854         skb = alloc_skb(128, GFP_ATOMIC);
 855         if (!skb) {
 856                 IWL_ERR(mvm, "alloc_skb failed\n");
 857                 return;
 858         }
 859
 860         rx_status = IEEE80211_SKB_RXCB(skb);
 861
 862         if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc,
 863                               le32_to_cpu(pkt->len_n_flags), queue,
 864                               &crypt_len)) {
 865                 kfree_skb(skb);
 866                 return;
 867         }
 868
 869         /*
 870          * Keep packets with CRC errors (and with overrun) for monitor mode
 871          * (otherwise the firmware discards them) but mark them as bad.
 872          */
 873         if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
 874             !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
 875                 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
 876                              le16_to_cpu(desc->status));
 877                 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
 878         }
 879         /* set the preamble flag if appropriate */
 880         if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
 881                 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
 882
 883         if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {
 884                 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
 885                 /* TSF as indicated by the firmware is at INA time */
 886                 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
 887         }
 888         rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
 889         rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ :
 890                                                NL80211_BAND_2GHZ;
 891         rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
 892                                                          rx_status->band);
 893         iwl_mvm_get_signal_strength(mvm, desc, rx_status);
 894
 895         /* update aggregation data for monitor sake on default queue */
 896         if (!queue && (phy_info & IWL_RX_MPDU_PHY_AMPDU)) {
 897                 bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
 898
 899                 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
 900                 rx_status->ampdu_reference = mvm->ampdu_ref;
 901                 /* toggle is switched whenever new aggregation starts */
 902                 if (toggle_bit != mvm->ampdu_toggle) {
 903                         mvm->ampdu_ref++;
 904                         mvm->ampdu_toggle = toggle_bit;
 905                 }
 906         }
 907
 908         rcu_read_lock();
 909
 910         if (desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_SRC_STA_FOUND)) {
 911                 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
 912
 913                 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
 914                         sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
 915                         if (IS_ERR(sta))
 916                                 sta = NULL;
 917                 }
 918         } else if (!is_multicast_ether_addr(hdr->addr2)) {
 919                 /*
 920                  * This is fine since we prevent two stations with the same
 921                  * address from being added.
 922                  */
 923                 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
 924         }
 925
 926         if (sta) {
 927                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 928                 struct ieee80211_vif *tx_blocked_vif =
 929                         rcu_dereference(mvm->csa_tx_blocked_vif);
 930                 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
 931                                IWL_RX_MPDU_REORDER_BAID_MASK) >>
 932                                IWL_RX_MPDU_REORDER_BAID_SHIFT);
 933
 934                 /*
 935                  * We have tx blocked stations (with CS bit). If we heard
 936                  * frames from a blocked station on a new channel we can
 937                  * TX to it again.
 938                  */
 939                 if (unlikely(tx_blocked_vif) &&
 940                     tx_blocked_vif == mvmsta->vif) {
 941                         struct iwl_mvm_vif *mvmvif =
 942                                 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
 943
 944                         if (mvmvif->csa_target_freq == rx_status->freq)
 945                                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
 946                                                                  false);
 947                 }
 948
 949                 rs_update_last_rssi(mvm, mvmsta, rx_status);
 950
 951                 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
 952                     ieee80211_is_beacon(hdr->frame_control)) {
 953                         struct iwl_fw_dbg_trigger_tlv *trig;
 954                         struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
 955                         bool trig_check;
 956                         s32 rssi;
 957
 958                         trig = iwl_fw_dbg_get_trigger(mvm->fw,
 959                                                       FW_DBG_TRIGGER_RSSI);
 960                         rssi_trig = (void *)trig->data;
 961                         rssi = le32_to_cpu(rssi_trig->rssi);
 962
 963                         trig_check =
 964                                 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
 965                                                               ieee80211_vif_to_wdev(mvmsta->vif),
 966                                                               trig);
 967                         if (trig_check && rx_status->signal < rssi)
 968                                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
 969                                                         NULL);
 970                 }
 971
 972                 if (ieee80211_is_data(hdr->frame_control))
 973                         iwl_mvm_rx_csum(sta, skb, desc);
 974
 975                 if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) {
 976                         kfree_skb(skb);
 977                         goto out;
 978                 }
 979
 980                 /*
 981                  * Our hardware de-aggregates AMSDUs but copies the mac header
 982                  * as it to the de-aggregated MPDUs. We need to turn off the
 983                  * AMSDU bit in the QoS control ourselves.
 984                  * In addition, HW reverses addr3 and addr4 - reverse it back.
 985                  */
 986                 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
 987                     !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
 988                         int i;
 989                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 990                         u8 mac_addr[ETH_ALEN];
 991
 992                         *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
 993
 994                         for (i = 0; i < ETH_ALEN; i++)
 995                                 mac_addr[i] = hdr->addr3[ETH_ALEN - i - 1];
 996                         ether_addr_copy(hdr->addr3, mac_addr);
 997
 998                         if (ieee80211_has_a4(hdr->frame_control)) {
 999                                 for (i = 0; i < ETH_ALEN; i++)
1000                                         mac_addr[i] =
1001                                                 hdr->addr4[ETH_ALEN - i - 1];
1002                                 ether_addr_copy(hdr->addr4, mac_addr);
1003                         }
1004                 }
1005                 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) {
1006                         u32 reorder_data = le32_to_cpu(desc->reorder_data);
1007
1008                         iwl_mvm_agg_rx_received(mvm, reorder_data, baid);
1009                 }
1010         }
1011
1012         /* Set up the HT phy flags */
1013         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1014         case RATE_MCS_CHAN_WIDTH_20:
1015                 break;
1016         case RATE_MCS_CHAN_WIDTH_40:
1017                 rx_status->bw = RATE_INFO_BW_40;
1018                 break;
1019         case RATE_MCS_CHAN_WIDTH_80:
1020                 rx_status->bw = RATE_INFO_BW_80;
1021                 break;
1022         case RATE_MCS_CHAN_WIDTH_160:
1023                 rx_status->bw = RATE_INFO_BW_160;
1024                 break;
1025         }
1026
1027         if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
1028             rate_n_flags & RATE_MCS_SGI_MSK)
1029                 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1030         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1031                 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
1032         if (rate_n_flags & RATE_MCS_LDPC_MSK)
1033                 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
1034         if (rate_n_flags & RATE_MCS_HT_MSK) {
1035                 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1036                                 RATE_MCS_STBC_POS;
1037                 rx_status->encoding = RX_ENC_HT;
1038                 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1039                 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1040         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1041                 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
1042                                 RATE_MCS_STBC_POS;
1043                 rx_status->nss =
1044                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1045                                                 RATE_VHT_MCS_NSS_POS) + 1;
1046                 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
1047                 rx_status->encoding = RX_ENC_VHT;
1048                 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
1049                 if (rate_n_flags & RATE_MCS_BF_MSK)
1050                         rx_status->enc_flags |= RX_ENC_FLAG_BF;
1051         } else {
1052                 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1053                                                                rx_status->band);
1054
1055                 if (WARN(rate < 0 || rate > 0xFF,
1056                          "Invalid rate flags 0x%x, band %d,\n",
1057                          rate_n_flags, rx_status->band)) {
1058                         kfree_skb(skb);
1059                         goto out;
1060                 }
1061                 rx_status->rate_idx = rate;
1062
1063         }
1064
1065         /* management stuff on default queue */
1066         if (!queue) {
1067                 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
1068                               ieee80211_is_probe_resp(hdr->frame_control)) &&
1069                              mvm->sched_scan_pass_all ==
1070                              SCHED_SCAN_PASS_ALL_ENABLED))
1071                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
1072
1073                 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
1074                              ieee80211_is_probe_resp(hdr->frame_control)))
1075                         rx_status->boottime_ns = ktime_get_boot_ns();
1076         }
1077
1078         iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb);
1079         if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
1080                 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
1081 out:
1082         rcu_read_unlock();
1083 }
1084
1085 void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
1086                               struct iwl_rx_cmd_buffer *rxb, int queue)
1087 {
1088         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1089         struct iwl_frame_release *release = (void *)pkt->data;
1090         struct ieee80211_sta *sta;
1091         struct iwl_mvm_reorder_buffer *reorder_buf;
1092         struct iwl_mvm_baid_data *ba_data;
1093
1094         int baid = release->baid;
1095
1096         IWL_DEBUG_HT(mvm, "Frame release notification for BAID %u, NSSN %d\n",
1097                      release->baid, le16_to_cpu(release->nssn));
1098
1099         if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1100                 return;
1101
1102         rcu_read_lock();
1103
1104         ba_data = rcu_dereference(mvm->baid_map[baid]);
1105         if (WARN_ON_ONCE(!ba_data))
1106                 goto out;
1107
1108         sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
1109         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1110                 goto out;
1111
1112         reorder_buf = &ba_data->reorder_buf[queue];
1113
1114         spin_lock_bh(&reorder_buf->lock);
1115         iwl_mvm_release_frames(mvm, sta, napi, ba_data, reorder_buf,
1116                                le16_to_cpu(release->nssn));
1117         spin_unlock_bh(&reorder_buf->lock);
1118
1119 out:
1120         rcu_read_unlock();
1121 }