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

   1 /******************************************************************************
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   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
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  10  * Copyright(c) 2016 Intel Deutschland GmbH
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  13  * it under the terms of version 2 of the GNU General Public License as
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  34  *
  35  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 Intel Deutschland GmbH
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  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67 #include <net/mac80211.h>
  68
  69 #include "mvm.h"
  70 #include "sta.h"
  71 #include "rs.h"
  72
  73 /*
  74  * New version of ADD_STA_sta command added new fields at the end of the
  75  * structure, so sending the size of the relevant API's structure is enough to
  76  * support both API versions.
  77  */
  78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
  79 {
  80         return iwl_mvm_has_new_rx_api(mvm) ?
  81                 sizeof(struct iwl_mvm_add_sta_cmd) :
  82                 sizeof(struct iwl_mvm_add_sta_cmd_v7);
  83 }
  84
  85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
  86                                     enum nl80211_iftype iftype)
  87 {
  88         int sta_id;
  89         u32 reserved_ids = 0;
  90
  91         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
  92         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
  93
  94         lockdep_assert_held(&mvm->mutex);
  95
  96         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
  97         if (iftype != NL80211_IFTYPE_STATION)
  98                 reserved_ids = BIT(0);
  99
 100         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
 101         for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
 102                 if (BIT(sta_id) & reserved_ids)
 103                         continue;
 104
 105                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 106                                                lockdep_is_held(&mvm->mutex)))
 107                         return sta_id;
 108         }
 109         return IWL_MVM_STATION_COUNT;
 110 }
 111
 112 /* send station add/update command to firmware */
 113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 114                            bool update, unsigned int flags)
 115 {
 116         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 117         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
 118                 .sta_id = mvm_sta->sta_id,
 119                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
 120                 .add_modify = update ? 1 : 0,
 121                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
 122                                                  STA_FLG_MIMO_EN_MSK),
 123                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 124         };
 125         int ret;
 126         u32 status;
 127         u32 agg_size = 0, mpdu_dens = 0;
 128
 129         if (!update || (flags & STA_MODIFY_QUEUES)) {
 130                 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
 131                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 132
 133                 if (flags & STA_MODIFY_QUEUES)
 134                         add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 135         }
 136
 137         switch (sta->bandwidth) {
 138         case IEEE80211_STA_RX_BW_160:
 139                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 140                 /* fall through */
 141         case IEEE80211_STA_RX_BW_80:
 142                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 143                 /* fall through */
 144         case IEEE80211_STA_RX_BW_40:
 145                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 146                 /* fall through */
 147         case IEEE80211_STA_RX_BW_20:
 148                 if (sta->ht_cap.ht_supported)
 149                         add_sta_cmd.station_flags |=
 150                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 151                 break;
 152         }
 153
 154         switch (sta->rx_nss) {
 155         case 1:
 156                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 157                 break;
 158         case 2:
 159                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 160                 break;
 161         case 3 ... 8:
 162                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 163                 break;
 164         }
 165
 166         switch (sta->smps_mode) {
 167         case IEEE80211_SMPS_AUTOMATIC:
 168         case IEEE80211_SMPS_NUM_MODES:
 169                 WARN_ON(1);
 170                 break;
 171         case IEEE80211_SMPS_STATIC:
 172                 /* override NSS */
 173                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 174                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 175                 break;
 176         case IEEE80211_SMPS_DYNAMIC:
 177                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 178                 break;
 179         case IEEE80211_SMPS_OFF:
 180                 /* nothing */
 181                 break;
 182         }
 183
 184         if (sta->ht_cap.ht_supported) {
 185                 add_sta_cmd.station_flags_msk |=
 186                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 187                                     STA_FLG_AGG_MPDU_DENS_MSK);
 188
 189                 mpdu_dens = sta->ht_cap.ampdu_density;
 190         }
 191
 192         if (sta->vht_cap.vht_supported) {
 193                 agg_size = sta->vht_cap.cap &
 194                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 195                 agg_size >>=
 196                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 197         } else if (sta->ht_cap.ht_supported) {
 198                 agg_size = sta->ht_cap.ampdu_factor;
 199         }
 200
 201         add_sta_cmd.station_flags |=
 202                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 203         add_sta_cmd.station_flags |=
 204                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 205         add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 206
 207         if (sta->wme) {
 208                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 209
 210                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 211                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BK);
 212                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 213                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BE);
 214                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 215                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VI);
 216                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 217                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VO);
 218         }
 219
 220         status = ADD_STA_SUCCESS;
 221         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 222                                           iwl_mvm_add_sta_cmd_size(mvm),
 223                                           &add_sta_cmd, &status);
 224         if (ret)
 225                 return ret;
 226
 227         switch (status & IWL_ADD_STA_STATUS_MASK) {
 228         case ADD_STA_SUCCESS:
 229                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 230                 break;
 231         default:
 232                 ret = -EIO;
 233                 IWL_ERR(mvm, "ADD_STA failed\n");
 234                 break;
 235         }
 236
 237         return ret;
 238 }
 239
 240 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
 241 {
 242         struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
 243         struct iwl_mvm_baid_data *ba_data;
 244         struct ieee80211_sta *sta;
 245         struct iwl_mvm_sta *mvm_sta;
 246         unsigned long timeout;
 247
 248         rcu_read_lock();
 249
 250         ba_data = rcu_dereference(*rcu_ptr);
 251
 252         if (WARN_ON(!ba_data))
 253                 goto unlock;
 254
 255         if (!ba_data->timeout)
 256                 goto unlock;
 257
 258         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 259         if (time_is_after_jiffies(timeout)) {
 260                 mod_timer(&ba_data->session_timer, timeout);
 261                 goto unlock;
 262         }
 263
 264         /* Timer expired */
 265         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 266         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 267         ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
 268                                           sta->addr, ba_data->tid);
 269 unlock:
 270         rcu_read_unlock();
 271 }
 272
 273 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
 274                                  struct ieee80211_sta *sta)
 275 {
 276         unsigned long used_hw_queues;
 277         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 278         unsigned int wdg_timeout =
 279                 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
 280         u32 ac;
 281
 282         lockdep_assert_held(&mvm->mutex);
 283
 284         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
 285
 286         /* Find available queues, and allocate them to the ACs */
 287         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 288                 u8 queue = find_first_zero_bit(&used_hw_queues,
 289                                                mvm->first_agg_queue);
 290
 291                 if (queue >= mvm->first_agg_queue) {
 292                         IWL_ERR(mvm, "Failed to allocate STA queue\n");
 293                         return -EBUSY;
 294                 }
 295
 296                 __set_bit(queue, &used_hw_queues);
 297                 mvmsta->hw_queue[ac] = queue;
 298         }
 299
 300         /* Found a place for all queues - enable them */
 301         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 302                 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
 303                                       mvmsta->hw_queue[ac],
 304                                       iwl_mvm_ac_to_tx_fifo[ac], 0,
 305                                       wdg_timeout);
 306                 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
 307         }
 308
 309         return 0;
 310 }
 311
 312 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
 313                                     struct ieee80211_sta *sta)
 314 {
 315         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 316         unsigned long sta_msk;
 317         int i;
 318
 319         lockdep_assert_held(&mvm->mutex);
 320
 321         /* disable the TDLS STA-specific queues */
 322         sta_msk = mvmsta->tfd_queue_msk;
 323         for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
 324                 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
 325 }
 326
 327 /* Disable aggregations for a bitmap of TIDs for a given station */
 328 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 329                                         unsigned long disable_agg_tids,
 330                                         bool remove_queue)
 331 {
 332         struct iwl_mvm_add_sta_cmd cmd = {};
 333         struct ieee80211_sta *sta;
 334         struct iwl_mvm_sta *mvmsta;
 335         u32 status;
 336         u8 sta_id;
 337         int ret;
 338
 339         spin_lock_bh(&mvm->queue_info_lock);
 340         sta_id = mvm->queue_info[queue].ra_sta_id;
 341         spin_unlock_bh(&mvm->queue_info_lock);
 342
 343         rcu_read_lock();
 344
 345         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 346
 347         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 348                 rcu_read_unlock();
 349                 return -EINVAL;
 350         }
 351
 352         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 353
 354         mvmsta->tid_disable_agg |= disable_agg_tids;
 355
 356         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 357         cmd.sta_id = mvmsta->sta_id;
 358         cmd.add_modify = STA_MODE_MODIFY;
 359         cmd.modify_mask = STA_MODIFY_QUEUES;
 360         if (disable_agg_tids)
 361                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 362         if (remove_queue)
 363                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 364         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 365         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 366
 367         rcu_read_unlock();
 368
 369         /* Notify FW of queue removal from the STA queues */
 370         status = ADD_STA_SUCCESS;
 371         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 372                                           iwl_mvm_add_sta_cmd_size(mvm),
 373                                           &cmd, &status);
 374
 375         return ret;
 376 }
 377
 378 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 379 {
 380         struct ieee80211_sta *sta;
 381         struct iwl_mvm_sta *mvmsta;
 382         unsigned long tid_bitmap;
 383         unsigned long agg_tids = 0;
 384         s8 sta_id;
 385         int tid;
 386
 387         lockdep_assert_held(&mvm->mutex);
 388
 389         spin_lock_bh(&mvm->queue_info_lock);
 390         sta_id = mvm->queue_info[queue].ra_sta_id;
 391         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 392         spin_unlock_bh(&mvm->queue_info_lock);
 393
 394         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 395                                         lockdep_is_held(&mvm->mutex));
 396
 397         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 398                 return -EINVAL;
 399
 400         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 401
 402         spin_lock_bh(&mvmsta->lock);
 403         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 404                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 405                         agg_tids |= BIT(tid);
 406         }
 407         spin_unlock_bh(&mvmsta->lock);
 408
 409         return agg_tids;
 410 }
 411
 412 /*
 413  * Remove a queue from a station's resources.
 414  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 415  * doesn't disable the queue
 416  */
 417 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 418 {
 419         struct ieee80211_sta *sta;
 420         struct iwl_mvm_sta *mvmsta;
 421         unsigned long tid_bitmap;
 422         unsigned long disable_agg_tids = 0;
 423         u8 sta_id;
 424         int tid;
 425
 426         lockdep_assert_held(&mvm->mutex);
 427
 428         spin_lock_bh(&mvm->queue_info_lock);
 429         sta_id = mvm->queue_info[queue].ra_sta_id;
 430         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 431         spin_unlock_bh(&mvm->queue_info_lock);
 432
 433         rcu_read_lock();
 434
 435         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 436
 437         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 438                 rcu_read_unlock();
 439                 return 0;
 440         }
 441
 442         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 443
 444         spin_lock_bh(&mvmsta->lock);
 445         /* Unmap MAC queues and TIDs from this queue */
 446         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 447                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 448                         disable_agg_tids |= BIT(tid);
 449                 mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
 450         }
 451
 452         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 453         spin_unlock_bh(&mvmsta->lock);
 454
 455         rcu_read_unlock();
 456
 457         spin_lock_bh(&mvm->queue_info_lock);
 458         /* Unmap MAC queues and TIDs from this queue */
 459         mvm->queue_info[queue].hw_queue_to_mac80211 = 0;
 460         mvm->queue_info[queue].hw_queue_refcount = 0;
 461         mvm->queue_info[queue].tid_bitmap = 0;
 462         spin_unlock_bh(&mvm->queue_info_lock);
 463
 464         return disable_agg_tids;
 465 }
 466
 467 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 468                                     unsigned long tfd_queue_mask, u8 ac)
 469 {
 470         int queue = 0;
 471         u8 ac_to_queue[IEEE80211_NUM_ACS];
 472         int i;
 473
 474         lockdep_assert_held(&mvm->queue_info_lock);
 475
 476         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 477
 478         /* See what ACs the existing queues for this STA have */
 479         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 480                 /* Only DATA queues can be shared */
 481                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 482                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 483                         continue;
 484
 485                 /* Don't try and take queues being reconfigured */
 486                 if (mvm->queue_info[queue].status ==
 487                     IWL_MVM_QUEUE_RECONFIGURING)
 488                         continue;
 489
 490                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 491         }
 492
 493         /*
 494          * The queue to share is chosen only from DATA queues as follows (in
 495          * descending priority):
 496          * 1. An AC_BE queue
 497          * 2. Same AC queue
 498          * 3. Highest AC queue that is lower than new AC
 499          * 4. Any existing AC (there always is at least 1 DATA queue)
 500          */
 501
 502         /* Priority 1: An AC_BE queue */
 503         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 504                 queue = ac_to_queue[IEEE80211_AC_BE];
 505         /* Priority 2: Same AC queue */
 506         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 507                 queue = ac_to_queue[ac];
 508         /* Priority 3a: If new AC is VO and VI exists - use VI */
 509         else if (ac == IEEE80211_AC_VO &&
 510                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 511                 queue = ac_to_queue[IEEE80211_AC_VI];
 512         /* Priority 3b: No BE so only AC less than the new one is BK */
 513         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 514                 queue = ac_to_queue[IEEE80211_AC_BK];
 515         /* Priority 4a: No BE nor BK - use VI if exists */
 516         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 517                 queue = ac_to_queue[IEEE80211_AC_VI];
 518         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 519         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 520                 queue = ac_to_queue[IEEE80211_AC_VO];
 521
 522         /* Make sure queue found (or not) is legal */
 523         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 524             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 525             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 526                 IWL_ERR(mvm, "No DATA queues available to share\n");
 527                 return -ENOSPC;
 528         }
 529
 530         /* Make sure the queue isn't in the middle of being reconfigured */
 531         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
 532                 IWL_ERR(mvm,
 533                         "TXQ %d is in the middle of re-config - try again\n",
 534                         queue);
 535                 return -EBUSY;
 536         }
 537
 538         return queue;
 539 }
 540
 541 /*
 542  * If a given queue has a higher AC than the TID stream that is being compared
 543  * to, the queue needs to be redirected to the lower AC. This function does that
 544  * in such a case, otherwise - if no redirection required - it does nothing,
 545  * unless the %force param is true.
 546  */
 547 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
 548                                int ac, int ssn, unsigned int wdg_timeout,
 549                                bool force)
 550 {
 551         struct iwl_scd_txq_cfg_cmd cmd = {
 552                 .scd_queue = queue,
 553                 .action = SCD_CFG_DISABLE_QUEUE,
 554         };
 555         bool shared_queue;
 556         unsigned long mq;
 557         int ret;
 558
 559         /*
 560          * If the AC is lower than current one - FIFO needs to be redirected to
 561          * the lowest one of the streams in the queue. Check if this is needed
 562          * here.
 563          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 564          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 565          * we need to check if the numerical value of X is LARGER than of Y.
 566          */
 567         spin_lock_bh(&mvm->queue_info_lock);
 568         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 569                 spin_unlock_bh(&mvm->queue_info_lock);
 570
 571                 IWL_DEBUG_TX_QUEUES(mvm,
 572                                     "No redirection needed on TXQ #%d\n",
 573                                     queue);
 574                 return 0;
 575         }
 576
 577         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 578         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 579         cmd.tid = mvm->queue_info[queue].txq_tid;
 580         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 581         shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
 582         spin_unlock_bh(&mvm->queue_info_lock);
 583
 584         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 585                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 586
 587         /* Stop MAC queues and wait for this queue to empty */
 588         iwl_mvm_stop_mac_queues(mvm, mq);
 589         ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue));
 590         if (ret) {
 591                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 592                         queue);
 593                 ret = -EIO;
 594                 goto out;
 595         }
 596
 597         /* Before redirecting the queue we need to de-activate it */
 598         iwl_trans_txq_disable(mvm->trans, queue, false);
 599         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 600         if (ret)
 601                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 602                         ret);
 603
 604         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 605         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 606
 607         /* Update the TID "owner" of the queue */
 608         spin_lock_bh(&mvm->queue_info_lock);
 609         mvm->queue_info[queue].txq_tid = tid;
 610         spin_unlock_bh(&mvm->queue_info_lock);
 611
 612         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 613
 614         /* Redirect to lower AC */
 615         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 616                              cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
 617                              ssn);
 618
 619         /* Update AC marking of the queue */
 620         spin_lock_bh(&mvm->queue_info_lock);
 621         mvm->queue_info[queue].mac80211_ac = ac;
 622         spin_unlock_bh(&mvm->queue_info_lock);
 623
 624         /*
 625          * Mark queue as shared in transport if shared
 626          * Note this has to be done after queue enablement because enablement
 627          * can also set this value, and there is no indication there to shared
 628          * queues
 629          */
 630         if (shared_queue)
 631                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 632
 633 out:
 634         /* Continue using the MAC queues */
 635         iwl_mvm_start_mac_queues(mvm, mq);
 636
 637         return ret;
 638 }
 639
 640 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
 641                                    struct ieee80211_sta *sta, u8 ac, int tid,
 642                                    struct ieee80211_hdr *hdr)
 643 {
 644         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 645         struct iwl_trans_txq_scd_cfg cfg = {
 646                 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
 647                 .sta_id = mvmsta->sta_id,
 648                 .tid = tid,
 649                 .frame_limit = IWL_FRAME_LIMIT,
 650         };
 651         unsigned int wdg_timeout =
 652                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 653         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 654         int queue = -1;
 655         bool using_inactive_queue = false;
 656         unsigned long disable_agg_tids = 0;
 657         enum iwl_mvm_agg_state queue_state;
 658         bool shared_queue = false;
 659         int ssn;
 660         unsigned long tfd_queue_mask;
 661         int ret;
 662
 663         lockdep_assert_held(&mvm->mutex);
 664
 665         spin_lock_bh(&mvmsta->lock);
 666         tfd_queue_mask = mvmsta->tfd_queue_msk;
 667         spin_unlock_bh(&mvmsta->lock);
 668
 669         spin_lock_bh(&mvm->queue_info_lock);
 670
 671         /*
 672          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
 673          * exists
 674          */
 675         if (!ieee80211_is_data_qos(hdr->frame_control) ||
 676             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 677                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 678                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
 679                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
 680                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
 681                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
 682                                             queue);
 683
 684                 /* If no such queue is found, we'll use a DATA queue instead */
 685         }
 686
 687         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
 688             (mvm->queue_info[mvmsta->reserved_queue].status ==
 689              IWL_MVM_QUEUE_RESERVED ||
 690              mvm->queue_info[mvmsta->reserved_queue].status ==
 691              IWL_MVM_QUEUE_INACTIVE)) {
 692                 queue = mvmsta->reserved_queue;
 693                 mvm->queue_info[queue].reserved = true;
 694                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
 695         }
 696
 697         if (queue < 0)
 698                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 699                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
 700                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 701
 702         /*
 703          * Check if this queue is already allocated but inactive.
 704          * In such a case, we'll need to first free this queue before enabling
 705          * it again, so we'll mark it as reserved to make sure no new traffic
 706          * arrives on it
 707          */
 708         if (queue > 0 &&
 709             mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
 710                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
 711                 using_inactive_queue = true;
 712                 IWL_DEBUG_TX_QUEUES(mvm,
 713                                     "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
 714                                     queue, mvmsta->sta_id, tid);
 715         }
 716
 717         /* No free queue - we'll have to share */
 718         if (queue <= 0) {
 719                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
 720                 if (queue > 0) {
 721                         shared_queue = true;
 722                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
 723                 }
 724         }
 725
 726         /*
 727          * Mark TXQ as ready, even though it hasn't been fully configured yet,
 728          * to make sure no one else takes it.
 729          * This will allow avoiding re-acquiring the lock at the end of the
 730          * configuration. On error we'll mark it back as free.
 731          */
 732         if ((queue > 0) && !shared_queue)
 733                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 734
 735         spin_unlock_bh(&mvm->queue_info_lock);
 736
 737         /* This shouldn't happen - out of queues */
 738         if (WARN_ON(queue <= 0)) {
 739                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
 740                         tid, cfg.sta_id);
 741                 return queue;
 742         }
 743
 744         /*
 745          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
 746          * but for configuring the SCD to send A-MPDUs we need to mark the queue
 747          * as aggregatable.
 748          * Mark all DATA queues as allowing to be aggregated at some point
 749          */
 750         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 751                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
 752
 753         /*
 754          * If this queue was previously inactive (idle) - we need to free it
 755          * first
 756          */
 757         if (using_inactive_queue) {
 758                 struct iwl_scd_txq_cfg_cmd cmd = {
 759                         .scd_queue = queue,
 760                         .action = SCD_CFG_DISABLE_QUEUE,
 761                 };
 762                 u8 txq_curr_ac;
 763
 764                 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 765
 766                 spin_lock_bh(&mvm->queue_info_lock);
 767                 txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
 768                 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 769                 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[txq_curr_ac];
 770                 cmd.tid = mvm->queue_info[queue].txq_tid;
 771                 spin_unlock_bh(&mvm->queue_info_lock);
 772
 773                 /* Disable the queue */
 774                 if (disable_agg_tids)
 775                         iwl_mvm_invalidate_sta_queue(mvm, queue,
 776                                                      disable_agg_tids, false);
 777                 iwl_trans_txq_disable(mvm->trans, queue, false);
 778                 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd),
 779                                            &cmd);
 780                 if (ret) {
 781                         IWL_ERR(mvm,
 782                                 "Failed to free inactive queue %d (ret=%d)\n",
 783                                 queue, ret);
 784
 785                         /* Re-mark the inactive queue as inactive */
 786                         spin_lock_bh(&mvm->queue_info_lock);
 787                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
 788                         spin_unlock_bh(&mvm->queue_info_lock);
 789
 790                         return ret;
 791                 }
 792
 793                 /* If TXQ is allocated to another STA, update removal in FW */
 794                 if (cmd.sta_id != mvmsta->sta_id)
 795                         iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 796         }
 797
 798         IWL_DEBUG_TX_QUEUES(mvm,
 799                             "Allocating %squeue #%d to sta %d on tid %d\n",
 800                             shared_queue ? "shared " : "", queue,
 801                             mvmsta->sta_id, tid);
 802
 803         if (shared_queue) {
 804                 /* Disable any open aggs on this queue */
 805                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
 806
 807                 if (disable_agg_tids) {
 808                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
 809                                             queue);
 810                         iwl_mvm_invalidate_sta_queue(mvm, queue,
 811                                                      disable_agg_tids, false);
 812                 }
 813         }
 814
 815         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 816         iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
 817                            wdg_timeout);
 818
 819         /*
 820          * Mark queue as shared in transport if shared
 821          * Note this has to be done after queue enablement because enablement
 822          * can also set this value, and there is no indication there to shared
 823          * queues
 824          */
 825         if (shared_queue)
 826                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 827
 828         spin_lock_bh(&mvmsta->lock);
 829         mvmsta->tid_data[tid].txq_id = queue;
 830         mvmsta->tid_data[tid].is_tid_active = true;
 831         mvmsta->tfd_queue_msk |= BIT(queue);
 832         queue_state = mvmsta->tid_data[tid].state;
 833
 834         if (mvmsta->reserved_queue == queue)
 835                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
 836         spin_unlock_bh(&mvmsta->lock);
 837
 838         if (!shared_queue) {
 839                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
 840                 if (ret)
 841                         goto out_err;
 842
 843                 /* If we need to re-enable aggregations... */
 844                 if (queue_state == IWL_AGG_ON) {
 845                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
 846                         if (ret)
 847                                 goto out_err;
 848                 }
 849         } else {
 850                 /* Redirect queue, if needed */
 851                 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
 852                                                  wdg_timeout, false);
 853                 if (ret)
 854                         goto out_err;
 855         }
 856
 857         return 0;
 858
 859 out_err:
 860         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
 861
 862         return ret;
 863 }
 864
 865 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
 866 {
 867         struct iwl_scd_txq_cfg_cmd cmd = {
 868                 .scd_queue = queue,
 869                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 870         };
 871         s8 sta_id;
 872         int tid;
 873         unsigned long tid_bitmap;
 874         int ret;
 875
 876         lockdep_assert_held(&mvm->mutex);
 877
 878         spin_lock_bh(&mvm->queue_info_lock);
 879         sta_id = mvm->queue_info[queue].ra_sta_id;
 880         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 881         spin_unlock_bh(&mvm->queue_info_lock);
 882
 883         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 884                 return;
 885
 886         /* Find any TID for queue */
 887         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 888         cmd.tid = tid;
 889         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 890
 891         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 892         if (ret) {
 893                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 894                         queue, ret);
 895                 return;
 896         }
 897
 898         spin_lock_bh(&mvm->queue_info_lock);
 899         mvm->queue_info[queue].txq_tid = tid;
 900         spin_unlock_bh(&mvm->queue_info_lock);
 901         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 902                             queue, tid);
 903 }
 904
 905 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
 906 {
 907         struct ieee80211_sta *sta;
 908         struct iwl_mvm_sta *mvmsta;
 909         s8 sta_id;
 910         int tid = -1;
 911         unsigned long tid_bitmap;
 912         unsigned int wdg_timeout;
 913         int ssn;
 914         int ret = true;
 915
 916         lockdep_assert_held(&mvm->mutex);
 917
 918         spin_lock_bh(&mvm->queue_info_lock);
 919         sta_id = mvm->queue_info[queue].ra_sta_id;
 920         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 921         spin_unlock_bh(&mvm->queue_info_lock);
 922
 923         /* Find TID for queue, and make sure it is the only one on the queue */
 924         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 925         if (tid_bitmap != BIT(tid)) {
 926                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
 927                         queue, tid_bitmap);
 928                 return;
 929         }
 930
 931         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
 932                             tid);
 933
 934         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 935                                         lockdep_is_held(&mvm->mutex));
 936
 937         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 938                 return;
 939
 940         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 941         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 942
 943         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
 944
 945         ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
 946                                          tid_to_mac80211_ac[tid], ssn,
 947                                          wdg_timeout, true);
 948         if (ret) {
 949                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
 950                 return;
 951         }
 952
 953         /* If aggs should be turned back on - do it */
 954         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
 955                 struct iwl_mvm_add_sta_cmd cmd = {0};
 956
 957                 mvmsta->tid_disable_agg &= ~BIT(tid);
 958
 959                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 960                 cmd.sta_id = mvmsta->sta_id;
 961                 cmd.add_modify = STA_MODE_MODIFY;
 962                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
 963                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 964                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 965
 966                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
 967                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
 968                 if (!ret) {
 969                         IWL_DEBUG_TX_QUEUES(mvm,
 970                                             "TXQ #%d is now aggregated again\n",
 971                                             queue);
 972
 973                         /* Mark queue intenally as aggregating again */
 974                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
 975                 }
 976         }
 977
 978         spin_lock_bh(&mvm->queue_info_lock);
 979         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 980         spin_unlock_bh(&mvm->queue_info_lock);
 981 }
 982
 983 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
 984 {
 985         if (tid == IWL_MAX_TID_COUNT)
 986                 return IEEE80211_AC_VO; /* MGMT */
 987
 988         return tid_to_mac80211_ac[tid];
 989 }
 990
 991 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
 992                                        struct ieee80211_sta *sta, int tid)
 993 {
 994         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 995         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 996         struct sk_buff *skb;
 997         struct ieee80211_hdr *hdr;
 998         struct sk_buff_head deferred_tx;
 999         u8 mac_queue;
1000         bool no_queue = false; /* Marks if there is a problem with the queue */
1001         u8 ac;
1002
1003         lockdep_assert_held(&mvm->mutex);
1004
1005         skb = skb_peek(&tid_data->deferred_tx_frames);
1006         if (!skb)
1007                 return;
1008         hdr = (void *)skb->data;
1009
1010         ac = iwl_mvm_tid_to_ac_queue(tid);
1011         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1012
1013         if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
1014             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1015                 IWL_ERR(mvm,
1016                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1017                         mvmsta->sta_id, tid);
1018
1019                 /*
1020                  * Mark queue as problematic so later the deferred traffic is
1021                  * freed, as we can do nothing with it
1022                  */
1023                 no_queue = true;
1024         }
1025
1026         __skb_queue_head_init(&deferred_tx);
1027
1028         /* Disable bottom-halves when entering TX path */
1029         local_bh_disable();
1030         spin_lock(&mvmsta->lock);
1031         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1032         mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1033         spin_unlock(&mvmsta->lock);
1034
1035         while ((skb = __skb_dequeue(&deferred_tx)))
1036                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1037                         ieee80211_free_txskb(mvm->hw, skb);
1038         local_bh_enable();
1039
1040         /* Wake queue */
1041         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1042 }
1043
1044 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1045 {
1046         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1047                                            add_stream_wk);
1048         struct ieee80211_sta *sta;
1049         struct iwl_mvm_sta *mvmsta;
1050         unsigned long deferred_tid_traffic;
1051         int queue, sta_id, tid;
1052
1053         /* Check inactivity of queues */
1054         iwl_mvm_inactivity_check(mvm);
1055
1056         mutex_lock(&mvm->mutex);
1057
1058         /* Reconfigure queues requiring reconfiguation */
1059         for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
1060                 bool reconfig;
1061                 bool change_owner;
1062
1063                 spin_lock_bh(&mvm->queue_info_lock);
1064                 reconfig = (mvm->queue_info[queue].status ==
1065                             IWL_MVM_QUEUE_RECONFIGURING);
1066
1067                 /*
1068                  * We need to take into account a situation in which a TXQ was
1069                  * allocated to TID x, and then turned shared by adding TIDs y
1070                  * and z. If TID x becomes inactive and is removed from the TXQ,
1071                  * ownership must be given to one of the remaining TIDs.
1072                  * This is mainly because if TID x continues - a new queue can't
1073                  * be allocated for it as long as it is an owner of another TXQ.
1074                  */
1075                 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1076                                  BIT(mvm->queue_info[queue].txq_tid)) &&
1077                                (mvm->queue_info[queue].status ==
1078                                 IWL_MVM_QUEUE_SHARED);
1079                 spin_unlock_bh(&mvm->queue_info_lock);
1080
1081                 if (reconfig)
1082                         iwl_mvm_unshare_queue(mvm, queue);
1083                 else if (change_owner)
1084                         iwl_mvm_change_queue_owner(mvm, queue);
1085         }
1086
1087         /* Go over all stations with deferred traffic */
1088         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1089                          IWL_MVM_STATION_COUNT) {
1090                 clear_bit(sta_id, mvm->sta_deferred_frames);
1091                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1092                                                 lockdep_is_held(&mvm->mutex));
1093                 if (IS_ERR_OR_NULL(sta))
1094                         continue;
1095
1096                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1097                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1098
1099                 for_each_set_bit(tid, &deferred_tid_traffic,
1100                                  IWL_MAX_TID_COUNT + 1)
1101                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1102         }
1103
1104         mutex_unlock(&mvm->mutex);
1105 }
1106
1107 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1108                                       struct ieee80211_sta *sta,
1109                                       enum nl80211_iftype vif_type)
1110 {
1111         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1112         int queue;
1113
1114         /*
1115          * Check for inactive queues, so we don't reach a situation where we
1116          * can't add a STA due to a shortage in queues that doesn't really exist
1117          */
1118         iwl_mvm_inactivity_check(mvm);
1119
1120         spin_lock_bh(&mvm->queue_info_lock);
1121
1122         /* Make sure we have free resources for this STA */
1123         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1124             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1125             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1126              IWL_MVM_QUEUE_FREE))
1127                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1128         else
1129                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1130                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1131                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1132         if (queue < 0) {
1133                 spin_unlock_bh(&mvm->queue_info_lock);
1134                 IWL_ERR(mvm, "No available queues for new station\n");
1135                 return -ENOSPC;
1136         }
1137         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1138
1139         spin_unlock_bh(&mvm->queue_info_lock);
1140
1141         mvmsta->reserved_queue = queue;
1142
1143         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1144                             queue, mvmsta->sta_id);
1145
1146         return 0;
1147 }
1148
1149 /*
1150  * In DQA mode, after a HW restart the queues should be allocated as before, in
1151  * order to avoid race conditions when there are shared queues. This function
1152  * does the re-mapping and queue allocation.
1153  *
1154  * Note that re-enabling aggregations isn't done in this function.
1155  */
1156 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1157                                                  struct iwl_mvm_sta *mvm_sta)
1158 {
1159         unsigned int wdg_timeout =
1160                         iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1161         int i;
1162         struct iwl_trans_txq_scd_cfg cfg = {
1163                 .sta_id = mvm_sta->sta_id,
1164                 .frame_limit = IWL_FRAME_LIMIT,
1165         };
1166
1167         /* Make sure reserved queue is still marked as such (or allocated) */
1168         mvm->queue_info[mvm_sta->reserved_queue].status =
1169                 IWL_MVM_QUEUE_RESERVED;
1170
1171         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1172                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1173                 int txq_id = tid_data->txq_id;
1174                 int ac;
1175                 u8 mac_queue;
1176
1177                 if (txq_id == IEEE80211_INVAL_HW_QUEUE)
1178                         continue;
1179
1180                 skb_queue_head_init(&tid_data->deferred_tx_frames);
1181
1182                 ac = tid_to_mac80211_ac[i];
1183                 mac_queue = mvm_sta->vif->hw_queue[ac];
1184
1185                 cfg.tid = i;
1186                 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
1187                 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1188                                  txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1189
1190                 IWL_DEBUG_TX_QUEUES(mvm,
1191                                     "Re-mapping sta %d tid %d to queue %d\n",
1192                                     mvm_sta->sta_id, i, txq_id);
1193
1194                 iwl_mvm_enable_txq(mvm, txq_id, mac_queue,
1195                                    IEEE80211_SEQ_TO_SN(tid_data->seq_number),
1196                                    &cfg, wdg_timeout);
1197
1198                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1199         }
1200
1201         atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
1202 }
1203
1204 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1205                     struct ieee80211_vif *vif,
1206                     struct ieee80211_sta *sta)
1207 {
1208         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1209         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1210         struct iwl_mvm_rxq_dup_data *dup_data;
1211         int i, ret, sta_id;
1212
1213         lockdep_assert_held(&mvm->mutex);
1214
1215         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1216                 sta_id = iwl_mvm_find_free_sta_id(mvm,
1217                                                   ieee80211_vif_type_p2p(vif));
1218         else
1219                 sta_id = mvm_sta->sta_id;
1220
1221         if (sta_id == IWL_MVM_STATION_COUNT)
1222                 return -ENOSPC;
1223
1224         spin_lock_init(&mvm_sta->lock);
1225
1226         /* In DQA mode, if this is a HW restart, re-alloc existing queues */
1227         if (iwl_mvm_is_dqa_supported(mvm) &&
1228             test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1229                 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1230                 goto update_fw;
1231         }
1232
1233         mvm_sta->sta_id = sta_id;
1234         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1235                                                       mvmvif->color);
1236         mvm_sta->vif = vif;
1237         mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1238         mvm_sta->tx_protection = 0;
1239         mvm_sta->tt_tx_protection = false;
1240
1241         /* HW restart, don't assume the memory has been zeroed */
1242         atomic_set(&mvm->pending_frames[sta_id], 0);
1243         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1244         mvm_sta->tfd_queue_msk = 0;
1245
1246         /*
1247          * Allocate new queues for a TDLS station, unless we're in DQA mode,
1248          * and then they'll be allocated dynamically
1249          */
1250         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1251                 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1252                 if (ret)
1253                         return ret;
1254         } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1255                 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1256                         if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1257                                 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1258         }
1259
1260         /* for HW restart - reset everything but the sequence number */
1261         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1262                 u16 seq = mvm_sta->tid_data[i].seq_number;
1263                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1264                 mvm_sta->tid_data[i].seq_number = seq;
1265
1266                 if (!iwl_mvm_is_dqa_supported(mvm))
1267                         continue;
1268
1269                 /*
1270                  * Mark all queues for this STA as unallocated and defer TX
1271                  * frames until the queue is allocated
1272                  */
1273                 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1274                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1275         }
1276         mvm_sta->deferred_traffic_tid_map = 0;
1277         mvm_sta->agg_tids = 0;
1278
1279         if (iwl_mvm_has_new_rx_api(mvm) &&
1280             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1281                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1282                                    sizeof(*dup_data),
1283                                    GFP_KERNEL);
1284                 if (!dup_data)
1285                         return -ENOMEM;
1286                 mvm_sta->dup_data = dup_data;
1287         }
1288
1289         if (iwl_mvm_is_dqa_supported(mvm)) {
1290                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1291                                                  ieee80211_vif_type_p2p(vif));
1292                 if (ret)
1293                         goto err;
1294         }
1295
1296 update_fw:
1297         ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1298         if (ret)
1299                 goto err;
1300
1301         if (vif->type == NL80211_IFTYPE_STATION) {
1302                 if (!sta->tdls) {
1303                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
1304                         mvmvif->ap_sta_id = sta_id;
1305                 } else {
1306                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
1307                 }
1308         }
1309
1310         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1311
1312         return 0;
1313
1314 err:
1315         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1316                 iwl_mvm_tdls_sta_deinit(mvm, sta);
1317         return ret;
1318 }
1319
1320 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1321                       bool drain)
1322 {
1323         struct iwl_mvm_add_sta_cmd cmd = {};
1324         int ret;
1325         u32 status;
1326
1327         lockdep_assert_held(&mvm->mutex);
1328
1329         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1330         cmd.sta_id = mvmsta->sta_id;
1331         cmd.add_modify = STA_MODE_MODIFY;
1332         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1333         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1334
1335         status = ADD_STA_SUCCESS;
1336         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1337                                           iwl_mvm_add_sta_cmd_size(mvm),
1338                                           &cmd, &status);
1339         if (ret)
1340                 return ret;
1341
1342         switch (status & IWL_ADD_STA_STATUS_MASK) {
1343         case ADD_STA_SUCCESS:
1344                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1345                                mvmsta->sta_id);
1346                 break;
1347         default:
1348                 ret = -EIO;
1349                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1350                         mvmsta->sta_id);
1351                 break;
1352         }
1353
1354         return ret;
1355 }
1356
1357 /*
1358  * Remove a station from the FW table. Before sending the command to remove
1359  * the station validate that the station is indeed known to the driver (sanity
1360  * only).
1361  */
1362 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1363 {
1364         struct ieee80211_sta *sta;
1365         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1366                 .sta_id = sta_id,
1367         };
1368         int ret;
1369
1370         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1371                                         lockdep_is_held(&mvm->mutex));
1372
1373         /* Note: internal stations are marked as error values */
1374         if (!sta) {
1375                 IWL_ERR(mvm, "Invalid station id\n");
1376                 return -EINVAL;
1377         }
1378
1379         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1380                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1381         if (ret) {
1382                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1383                 return ret;
1384         }
1385
1386         return 0;
1387 }
1388
1389 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1390 {
1391         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1392         u8 sta_id;
1393
1394         /*
1395          * The mutex is needed because of the SYNC cmd, but not only: if the
1396          * work would run concurrently with iwl_mvm_rm_sta, it would run before
1397          * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1398          * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1399          * that later.
1400          */
1401         mutex_lock(&mvm->mutex);
1402
1403         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1404                 int ret;
1405                 struct ieee80211_sta *sta =
1406                         rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1407                                                   lockdep_is_held(&mvm->mutex));
1408
1409                 /*
1410                  * This station is in use or RCU-removed; the latter happens in
1411                  * managed mode, where mac80211 removes the station before we
1412                  * can remove it from firmware (we can only do that after the
1413                  * MAC is marked unassociated), and possibly while the deauth
1414                  * frame to disconnect from the AP is still queued. Then, the
1415                  * station pointer is -ENOENT when the last skb is reclaimed.
1416                  */
1417                 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1418                         continue;
1419
1420                 if (PTR_ERR(sta) == -EINVAL) {
1421                         IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1422                                 sta_id);
1423                         continue;
1424                 }
1425
1426                 if (!sta) {
1427                         IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1428                                 sta_id);
1429                         continue;
1430                 }
1431
1432                 WARN_ON(PTR_ERR(sta) != -EBUSY);
1433                 /* This station was removed and we waited until it got drained,
1434                  * we can now proceed and remove it.
1435                  */
1436                 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1437                 if (ret) {
1438                         IWL_ERR(mvm,
1439                                 "Couldn't remove sta %d after it was drained\n",
1440                                 sta_id);
1441                         continue;
1442                 }
1443                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1444                 clear_bit(sta_id, mvm->sta_drained);
1445
1446                 if (mvm->tfd_drained[sta_id]) {
1447                         unsigned long i, msk = mvm->tfd_drained[sta_id];
1448
1449                         for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1450                                 iwl_mvm_disable_txq(mvm, i, i,
1451                                                     IWL_MAX_TID_COUNT, 0);
1452
1453                         mvm->tfd_drained[sta_id] = 0;
1454                         IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1455                                        sta_id, msk);
1456                 }
1457         }
1458
1459         mutex_unlock(&mvm->mutex);
1460 }
1461
1462 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1463                                        struct ieee80211_vif *vif,
1464                                        struct iwl_mvm_sta *mvm_sta)
1465 {
1466         int ac;
1467         int i;
1468
1469         lockdep_assert_held(&mvm->mutex);
1470
1471         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1472                 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
1473                         continue;
1474
1475                 ac = iwl_mvm_tid_to_ac_queue(i);
1476                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1477                                     vif->hw_queue[ac], i, 0);
1478                 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1479         }
1480 }
1481
1482 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1483                    struct ieee80211_vif *vif,
1484                    struct ieee80211_sta *sta)
1485 {
1486         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1487         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1488         int ret;
1489
1490         lockdep_assert_held(&mvm->mutex);
1491
1492         if (iwl_mvm_has_new_rx_api(mvm))
1493                 kfree(mvm_sta->dup_data);
1494
1495         if ((vif->type == NL80211_IFTYPE_STATION &&
1496              mvmvif->ap_sta_id == mvm_sta->sta_id) ||
1497             iwl_mvm_is_dqa_supported(mvm)){
1498                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1499                 if (ret)
1500                         return ret;
1501                 /* flush its queues here since we are freeing mvm_sta */
1502                 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1503                 if (ret)
1504                         return ret;
1505                 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1506                                                     mvm_sta->tfd_queue_msk);
1507                 if (ret)
1508                         return ret;
1509                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1510
1511                 /* If DQA is supported - the queues can be disabled now */
1512                 if (iwl_mvm_is_dqa_supported(mvm))
1513                         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1514
1515                 /* If there is a TXQ still marked as reserved - free it */
1516                 if (iwl_mvm_is_dqa_supported(mvm) &&
1517                     mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1518                         u8 reserved_txq = mvm_sta->reserved_queue;
1519                         enum iwl_mvm_queue_status *status;
1520
1521                         /*
1522                          * If no traffic has gone through the reserved TXQ - it
1523                          * is still marked as IWL_MVM_QUEUE_RESERVED, and
1524                          * should be manually marked as free again
1525                          */
1526                         spin_lock_bh(&mvm->queue_info_lock);
1527                         status = &mvm->queue_info[reserved_txq].status;
1528                         if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1529                                  (*status != IWL_MVM_QUEUE_FREE),
1530                                  "sta_id %d reserved txq %d status %d",
1531                                  mvm_sta->sta_id, reserved_txq, *status)) {
1532                                 spin_unlock_bh(&mvm->queue_info_lock);
1533                                 return -EINVAL;
1534                         }
1535
1536                         *status = IWL_MVM_QUEUE_FREE;
1537                         spin_unlock_bh(&mvm->queue_info_lock);
1538                 }
1539
1540                 if (vif->type == NL80211_IFTYPE_STATION &&
1541                     mvmvif->ap_sta_id == mvm_sta->sta_id) {
1542                         /* if associated - we can't remove the AP STA now */
1543                         if (vif->bss_conf.assoc)
1544                                 return ret;
1545
1546                         /* unassoc - go ahead - remove the AP STA now */
1547                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1548
1549                         /* clear d0i3_ap_sta_id if no longer relevant */
1550                         if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
1551                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1552                 }
1553         }
1554
1555         /*
1556          * This shouldn't happen - the TDLS channel switch should be canceled
1557          * before the STA is removed.
1558          */
1559         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
1560                 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
1561                 cancel_delayed_work(&mvm->tdls_cs.dwork);
1562         }
1563
1564         /*
1565          * Make sure that the tx response code sees the station as -EBUSY and
1566          * calls the drain worker.
1567          */
1568         spin_lock_bh(&mvm_sta->lock);
1569         /*
1570          * There are frames pending on the AC queues for this station.
1571          * We need to wait until all the frames are drained...
1572          */
1573         if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
1574                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1575                                    ERR_PTR(-EBUSY));
1576                 spin_unlock_bh(&mvm_sta->lock);
1577
1578                 /* disable TDLS sta queues on drain complete */
1579                 if (sta->tdls) {
1580                         mvm->tfd_drained[mvm_sta->sta_id] =
1581                                                         mvm_sta->tfd_queue_msk;
1582                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
1583                                        mvm_sta->sta_id);
1584                 }
1585
1586                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1587         } else {
1588                 spin_unlock_bh(&mvm_sta->lock);
1589
1590                 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1591                         iwl_mvm_tdls_sta_deinit(mvm, sta);
1592
1593                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1594                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1595         }
1596
1597         return ret;
1598 }
1599
1600 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1601                       struct ieee80211_vif *vif,
1602                       u8 sta_id)
1603 {
1604         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1605
1606         lockdep_assert_held(&mvm->mutex);
1607
1608         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1609         return ret;
1610 }
1611
1612 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1613                              struct iwl_mvm_int_sta *sta,
1614                              u32 qmask, enum nl80211_iftype iftype)
1615 {
1616         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1617                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1618                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
1619                         return -ENOSPC;
1620         }
1621
1622         sta->tfd_queue_msk = qmask;
1623
1624         /* put a non-NULL value so iterating over the stations won't stop */
1625         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1626         return 0;
1627 }
1628
1629 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
1630                                     struct iwl_mvm_int_sta *sta)
1631 {
1632         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1633         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1634         sta->sta_id = IWL_MVM_STATION_COUNT;
1635 }
1636
1637 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1638                                       struct iwl_mvm_int_sta *sta,
1639                                       const u8 *addr,
1640                                       u16 mac_id, u16 color)
1641 {
1642         struct iwl_mvm_add_sta_cmd cmd;
1643         int ret;
1644         u32 status;
1645
1646         lockdep_assert_held(&mvm->mutex);
1647
1648         memset(&cmd, 0, sizeof(cmd));
1649         cmd.sta_id = sta->sta_id;
1650         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1651                                                              color));
1652
1653         cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1654         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1655
1656         if (addr)
1657                 memcpy(cmd.addr, addr, ETH_ALEN);
1658
1659         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1660                                           iwl_mvm_add_sta_cmd_size(mvm),
1661                                           &cmd, &status);
1662         if (ret)
1663                 return ret;
1664
1665         switch (status & IWL_ADD_STA_STATUS_MASK) {
1666         case ADD_STA_SUCCESS:
1667                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1668                 return 0;
1669         default:
1670                 ret = -EIO;
1671                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1672                         status);
1673                 break;
1674         }
1675         return ret;
1676 }
1677
1678 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1679 {
1680         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1681                                         mvm->cfg->base_params->wd_timeout :
1682                                         IWL_WATCHDOG_DISABLED;
1683         int ret;
1684
1685         lockdep_assert_held(&mvm->mutex);
1686
1687         /* Map Aux queue to fifo - needs to happen before adding Aux station */
1688         if (!iwl_mvm_is_dqa_supported(mvm))
1689                 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1690                                       IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1691
1692         /* Allocate aux station and assign to it the aux queue */
1693         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1694                                        NL80211_IFTYPE_UNSPECIFIED);
1695         if (ret)
1696                 return ret;
1697
1698         if (iwl_mvm_is_dqa_supported(mvm)) {
1699                 struct iwl_trans_txq_scd_cfg cfg = {
1700                         .fifo = IWL_MVM_TX_FIFO_MCAST,
1701                         .sta_id = mvm->aux_sta.sta_id,
1702                         .tid = IWL_MAX_TID_COUNT,
1703                         .aggregate = false,
1704                         .frame_limit = IWL_FRAME_LIMIT,
1705                 };
1706
1707                 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1708                                    wdg_timeout);
1709         }
1710
1711         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1712                                          MAC_INDEX_AUX, 0);
1713
1714         if (ret)
1715                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1716         return ret;
1717 }
1718
1719 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1720 {
1721         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1722
1723         lockdep_assert_held(&mvm->mutex);
1724         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1725                                          mvmvif->id, 0);
1726 }
1727
1728 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1729 {
1730         int ret;
1731
1732         lockdep_assert_held(&mvm->mutex);
1733
1734         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1735         if (ret)
1736                 IWL_WARN(mvm, "Failed sending remove station\n");
1737
1738         return ret;
1739 }
1740
1741 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1742 {
1743         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1744 }
1745
1746 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1747 {
1748         lockdep_assert_held(&mvm->mutex);
1749
1750         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1751 }
1752
1753 /*
1754  * Send the add station command for the vif's broadcast station.
1755  * Assumes that the station was already allocated.
1756  *
1757  * @mvm: the mvm component
1758  * @vif: the interface to which the broadcast station is added
1759  * @bsta: the broadcast station to add.
1760  */
1761 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1762 {
1763         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1764         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1765         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1766         const u8 *baddr = _baddr;
1767
1768         lockdep_assert_held(&mvm->mutex);
1769
1770         if (iwl_mvm_is_dqa_supported(mvm)) {
1771                 struct iwl_trans_txq_scd_cfg cfg = {
1772                         .fifo = IWL_MVM_TX_FIFO_VO,
1773                         .sta_id = mvmvif->bcast_sta.sta_id,
1774                         .tid = IWL_MAX_TID_COUNT,
1775                         .aggregate = false,
1776                         .frame_limit = IWL_FRAME_LIMIT,
1777                 };
1778                 unsigned int wdg_timeout =
1779                         iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1780                 int queue;
1781
1782                 if ((vif->type == NL80211_IFTYPE_AP) &&
1783                     (mvmvif->bcast_sta.tfd_queue_msk &
1784                      BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1785                         queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1786                 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
1787                          (mvmvif->bcast_sta.tfd_queue_msk &
1788                           BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
1789                         queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1790                 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1791                         return -EINVAL;
1792
1793                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1794                                    wdg_timeout);
1795         }
1796
1797         if (vif->type == NL80211_IFTYPE_ADHOC)
1798                 baddr = vif->bss_conf.bssid;
1799
1800         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1801                 return -ENOSPC;
1802
1803         return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1804                                           mvmvif->id, mvmvif->color);
1805 }
1806
1807 /* Send the FW a request to remove the station from it's internal data
1808  * structures, but DO NOT remove the entry from the local data structures. */
1809 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1810 {
1811         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1812         int ret;
1813
1814         lockdep_assert_held(&mvm->mutex);
1815
1816         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1817         if (ret)
1818                 IWL_WARN(mvm, "Failed sending remove station\n");
1819         return ret;
1820 }
1821
1822 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1823 {
1824         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1825         u32 qmask = 0;
1826
1827         lockdep_assert_held(&mvm->mutex);
1828
1829         if (!iwl_mvm_is_dqa_supported(mvm))
1830                 qmask = iwl_mvm_mac_get_queues_mask(vif);
1831
1832         if (vif->type == NL80211_IFTYPE_AP) {
1833                 /*
1834                  * The firmware defines the TFD queue mask to only be relevant
1835                  * for *unicast* queues, so the multicast (CAB) queue shouldn't
1836                  * be included.
1837                  */
1838                 qmask &= ~BIT(vif->cab_queue);
1839
1840                 if (iwl_mvm_is_dqa_supported(mvm))
1841                         qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1842         } else if (iwl_mvm_is_dqa_supported(mvm) &&
1843                    vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1844                 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1845         }
1846
1847         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1848                                         ieee80211_vif_type_p2p(vif));
1849 }
1850
1851 /* Allocate a new station entry for the broadcast station to the given vif,
1852  * and send it to the FW.
1853  * Note that each P2P mac should have its own broadcast station.
1854  *
1855  * @mvm: the mvm component
1856  * @vif: the interface to which the broadcast station is added
1857  * @bsta: the broadcast station to add. */
1858 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1859 {
1860         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1861         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1862         int ret;
1863
1864         lockdep_assert_held(&mvm->mutex);
1865
1866         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1867         if (ret)
1868                 return ret;
1869
1870         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1871
1872         if (ret)
1873                 iwl_mvm_dealloc_int_sta(mvm, bsta);
1874
1875         return ret;
1876 }
1877
1878 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1879 {
1880         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1881
1882         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1883 }
1884
1885 /*
1886  * Send the FW a request to remove the station from it's internal data
1887  * structures, and in addition remove it from the local data structure.
1888  */
1889 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1890 {
1891         int ret;
1892
1893         lockdep_assert_held(&mvm->mutex);
1894
1895         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1896
1897         iwl_mvm_dealloc_bcast_sta(mvm, vif);
1898
1899         return ret;
1900 }
1901
1902 #define IWL_MAX_RX_BA_SESSIONS 16
1903
1904 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1905 {
1906         struct iwl_mvm_delba_notif notif = {
1907                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1908                 .metadata.sync = 1,
1909                 .delba.baid = baid,
1910         };
1911         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1912 };
1913
1914 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1915                                  struct iwl_mvm_baid_data *data)
1916 {
1917         int i;
1918
1919         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
1920
1921         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1922                 int j;
1923                 struct iwl_mvm_reorder_buffer *reorder_buf =
1924                         &data->reorder_buf[i];
1925
1926                 spin_lock_bh(&reorder_buf->lock);
1927                 if (likely(!reorder_buf->num_stored)) {
1928                         spin_unlock_bh(&reorder_buf->lock);
1929                         continue;
1930                 }
1931
1932                 /*
1933                  * This shouldn't happen in regular DELBA since the internal
1934                  * delBA notification should trigger a release of all frames in
1935                  * the reorder buffer.
1936                  */
1937                 WARN_ON(1);
1938
1939                 for (j = 0; j < reorder_buf->buf_size; j++)
1940                         __skb_queue_purge(&reorder_buf->entries[j]);
1941                 /*
1942                  * Prevent timer re-arm. This prevents a very far fetched case
1943                  * where we timed out on the notification. There may be prior
1944                  * RX frames pending in the RX queue before the notification
1945                  * that might get processed between now and the actual deletion
1946                  * and we would re-arm the timer although we are deleting the
1947                  * reorder buffer.
1948                  */
1949                 reorder_buf->removed = true;
1950                 spin_unlock_bh(&reorder_buf->lock);
1951                 del_timer_sync(&reorder_buf->reorder_timer);
1952         }
1953 }
1954
1955 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
1956                                         u32 sta_id,
1957                                         struct iwl_mvm_baid_data *data,
1958                                         u16 ssn, u8 buf_size)
1959 {
1960         int i;
1961
1962         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1963                 struct iwl_mvm_reorder_buffer *reorder_buf =
1964                         &data->reorder_buf[i];
1965                 int j;
1966
1967                 reorder_buf->num_stored = 0;
1968                 reorder_buf->head_sn = ssn;
1969                 reorder_buf->buf_size = buf_size;
1970                 /* rx reorder timer */
1971                 reorder_buf->reorder_timer.function =
1972                         iwl_mvm_reorder_timer_expired;
1973                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
1974                 init_timer(&reorder_buf->reorder_timer);
1975                 spin_lock_init(&reorder_buf->lock);
1976                 reorder_buf->mvm = mvm;
1977                 reorder_buf->queue = i;
1978                 reorder_buf->sta_id = sta_id;
1979                 for (j = 0; j < reorder_buf->buf_size; j++)
1980                         __skb_queue_head_init(&reorder_buf->entries[j]);
1981         }
1982 }
1983
1984 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1985                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
1986 {
1987         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1988         struct iwl_mvm_add_sta_cmd cmd = {};
1989         struct iwl_mvm_baid_data *baid_data = NULL;
1990         int ret;
1991         u32 status;
1992
1993         lockdep_assert_held(&mvm->mutex);
1994
1995         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1996                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1997                 return -ENOSPC;
1998         }
1999
2000         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2001                 /*
2002                  * Allocate here so if allocation fails we can bail out early
2003                  * before starting the BA session in the firmware
2004                  */
2005                 baid_data = kzalloc(sizeof(*baid_data) +
2006                                     mvm->trans->num_rx_queues *
2007                                     sizeof(baid_data->reorder_buf[0]),
2008                                     GFP_KERNEL);
2009                 if (!baid_data)
2010                         return -ENOMEM;
2011         }
2012
2013         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2014         cmd.sta_id = mvm_sta->sta_id;
2015         cmd.add_modify = STA_MODE_MODIFY;
2016         if (start) {
2017                 cmd.add_immediate_ba_tid = (u8) tid;
2018                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2019                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2020         } else {
2021                 cmd.remove_immediate_ba_tid = (u8) tid;
2022         }
2023         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2024                                   STA_MODIFY_REMOVE_BA_TID;
2025
2026         status = ADD_STA_SUCCESS;
2027         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2028                                           iwl_mvm_add_sta_cmd_size(mvm),
2029                                           &cmd, &status);
2030         if (ret)
2031                 goto out_free;
2032
2033         switch (status & IWL_ADD_STA_STATUS_MASK) {
2034         case ADD_STA_SUCCESS:
2035                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2036                              start ? "start" : "stopp");
2037                 break;
2038         case ADD_STA_IMMEDIATE_BA_FAILURE:
2039                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2040                 ret = -ENOSPC;
2041                 break;
2042         default:
2043                 ret = -EIO;
2044                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2045                         start ? "start" : "stopp", status);
2046                 break;
2047         }
2048
2049         if (ret)
2050                 goto out_free;
2051
2052         if (start) {
2053                 u8 baid;
2054
2055                 mvm->rx_ba_sessions++;
2056
2057                 if (!iwl_mvm_has_new_rx_api(mvm))
2058                         return 0;
2059
2060                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2061                         ret = -EINVAL;
2062                         goto out_free;
2063                 }
2064                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2065                             IWL_ADD_STA_BAID_SHIFT);
2066                 baid_data->baid = baid;
2067                 baid_data->timeout = timeout;
2068                 baid_data->last_rx = jiffies;
2069                 setup_timer(&baid_data->session_timer,
2070                             iwl_mvm_rx_agg_session_expired,
2071                             (unsigned long)&mvm->baid_map[baid]);
2072                 baid_data->mvm = mvm;
2073                 baid_data->tid = tid;
2074                 baid_data->sta_id = mvm_sta->sta_id;
2075
2076                 mvm_sta->tid_to_baid[tid] = baid;
2077                 if (timeout)
2078                         mod_timer(&baid_data->session_timer,
2079                                   TU_TO_EXP_TIME(timeout * 2));
2080
2081                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2082                                             baid_data, ssn, buf_size);
2083                 /*
2084                  * protect the BA data with RCU to cover a case where our
2085                  * internal RX sync mechanism will timeout (not that it's
2086                  * supposed to happen) and we will free the session data while
2087                  * RX is being processed in parallel
2088                  */
2089                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2090                              mvm_sta->sta_id, tid, baid);
2091                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2092                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2093         } else  {
2094                 u8 baid = mvm_sta->tid_to_baid[tid];
2095
2096                 if (mvm->rx_ba_sessions > 0)
2097                         /* check that restart flow didn't zero the counter */
2098                         mvm->rx_ba_sessions--;
2099                 if (!iwl_mvm_has_new_rx_api(mvm))
2100                         return 0;
2101
2102                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2103                         return -EINVAL;
2104
2105                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2106                 if (WARN_ON(!baid_data))
2107                         return -EINVAL;
2108
2109                 /* synchronize all rx queues so we can safely delete */
2110                 iwl_mvm_free_reorder(mvm, baid_data);
2111                 del_timer_sync(&baid_data->session_timer);
2112                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2113                 kfree_rcu(baid_data, rcu_head);
2114                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2115         }
2116         return 0;
2117
2118 out_free:
2119         kfree(baid_data);
2120         return ret;
2121 }
2122
2123 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2124                        int tid, u8 queue, bool start)
2125 {
2126         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2127         struct iwl_mvm_add_sta_cmd cmd = {};
2128         int ret;
2129         u32 status;
2130
2131         lockdep_assert_held(&mvm->mutex);
2132
2133         if (start) {
2134                 mvm_sta->tfd_queue_msk |= BIT(queue);
2135                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2136         } else {
2137                 /* In DQA-mode the queue isn't removed on agg termination */
2138                 if (!iwl_mvm_is_dqa_supported(mvm))
2139                         mvm_sta->tfd_queue_msk &= ~BIT(queue);
2140                 mvm_sta->tid_disable_agg |= BIT(tid);
2141         }
2142
2143         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2144         cmd.sta_id = mvm_sta->sta_id;
2145         cmd.add_modify = STA_MODE_MODIFY;
2146         cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
2147         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2148         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2149
2150         status = ADD_STA_SUCCESS;
2151         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2152                                           iwl_mvm_add_sta_cmd_size(mvm),
2153                                           &cmd, &status);
2154         if (ret)
2155                 return ret;
2156
2157         switch (status & IWL_ADD_STA_STATUS_MASK) {
2158         case ADD_STA_SUCCESS:
2159                 break;
2160         default:
2161                 ret = -EIO;
2162                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2163                         start ? "start" : "stopp", status);
2164                 break;
2165         }
2166
2167         return ret;
2168 }
2169
2170 const u8 tid_to_mac80211_ac[] = {
2171         IEEE80211_AC_BE,
2172         IEEE80211_AC_BK,
2173         IEEE80211_AC_BK,
2174         IEEE80211_AC_BE,
2175         IEEE80211_AC_VI,
2176         IEEE80211_AC_VI,
2177         IEEE80211_AC_VO,
2178         IEEE80211_AC_VO,
2179         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2180 };
2181
2182 static const u8 tid_to_ucode_ac[] = {
2183         AC_BE,
2184         AC_BK,
2185         AC_BK,
2186         AC_BE,
2187         AC_VI,
2188         AC_VI,
2189         AC_VO,
2190         AC_VO,
2191 };
2192
2193 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2194                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2195 {
2196         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2197         struct iwl_mvm_tid_data *tid_data;
2198         int txq_id;
2199         int ret;
2200
2201         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2202                 return -EINVAL;
2203
2204         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2205                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2206                         mvmsta->tid_data[tid].state);
2207                 return -ENXIO;
2208         }
2209
2210         lockdep_assert_held(&mvm->mutex);
2211
2212         spin_lock_bh(&mvmsta->lock);
2213
2214         /* possible race condition - we entered D0i3 while starting agg */
2215         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2216                 spin_unlock_bh(&mvmsta->lock);
2217                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2218                 return -EIO;
2219         }
2220
2221         spin_lock(&mvm->queue_info_lock);
2222
2223         /*
2224          * Note the possible cases:
2225          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2226          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2227          *      one and mark it as reserved
2228          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2229          *      non-DQA mode, since the TXQ hasn't yet been allocated
2230          */
2231         txq_id = mvmsta->tid_data[tid].txq_id;
2232         if (iwl_mvm_is_dqa_supported(mvm) &&
2233             unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) {
2234                 ret = -ENXIO;
2235                 IWL_DEBUG_TX_QUEUES(mvm,
2236                                     "Can't start tid %d agg on shared queue!\n",
2237                                     tid);
2238                 goto release_locks;
2239         } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2240             mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2241                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2242                                                  mvm->first_agg_queue,
2243                                                  mvm->last_agg_queue);
2244                 if (txq_id < 0) {
2245                         ret = txq_id;
2246                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2247                         goto release_locks;
2248                 }
2249
2250                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2251                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2252         }
2253
2254         spin_unlock(&mvm->queue_info_lock);
2255
2256         IWL_DEBUG_TX_QUEUES(mvm,
2257                             "AGG for tid %d will be on queue #%d\n",
2258                             tid, txq_id);
2259
2260         tid_data = &mvmsta->tid_data[tid];
2261         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2262         tid_data->txq_id = txq_id;
2263         *ssn = tid_data->ssn;
2264
2265         IWL_DEBUG_TX_QUEUES(mvm,
2266                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2267                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2268                             tid_data->next_reclaimed);
2269
2270         if (tid_data->ssn == tid_data->next_reclaimed) {
2271                 tid_data->state = IWL_AGG_STARTING;
2272                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2273         } else {
2274                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2275         }
2276
2277         ret = 0;
2278         goto out;
2279
2280 release_locks:
2281         spin_unlock(&mvm->queue_info_lock);
2282 out:
2283         spin_unlock_bh(&mvmsta->lock);
2284
2285         return ret;
2286 }
2287
2288 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2289                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2290                             bool amsdu)
2291 {
2292         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2293         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2294         unsigned int wdg_timeout =
2295                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2296         int queue, ret;
2297         bool alloc_queue = true;
2298         enum iwl_mvm_queue_status queue_status;
2299         u16 ssn;
2300
2301         struct iwl_trans_txq_scd_cfg cfg = {
2302                 .sta_id = mvmsta->sta_id,
2303                 .tid = tid,
2304                 .frame_limit = buf_size,
2305                 .aggregate = true,
2306         };
2307
2308         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2309                      != IWL_MAX_TID_COUNT);
2310
2311         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2312
2313         spin_lock_bh(&mvmsta->lock);
2314         ssn = tid_data->ssn;
2315         queue = tid_data->txq_id;
2316         tid_data->state = IWL_AGG_ON;
2317         mvmsta->agg_tids |= BIT(tid);
2318         tid_data->ssn = 0xffff;
2319         tid_data->amsdu_in_ampdu_allowed = amsdu;
2320         spin_unlock_bh(&mvmsta->lock);
2321
2322         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2323
2324         spin_lock_bh(&mvm->queue_info_lock);
2325         queue_status = mvm->queue_info[queue].status;
2326         spin_unlock_bh(&mvm->queue_info_lock);
2327
2328         /* In DQA mode, the existing queue might need to be reconfigured */
2329         if (iwl_mvm_is_dqa_supported(mvm)) {
2330                 /* Maybe there is no need to even alloc a queue... */
2331                 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2332                         alloc_queue = false;
2333
2334                 /*
2335                  * Only reconfig the SCD for the queue if the window size has
2336                  * changed from current (become smaller)
2337                  */
2338                 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2339                         /*
2340                          * If reconfiguring an existing queue, it first must be
2341                          * drained
2342                          */
2343                         ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
2344                                                             BIT(queue));
2345                         if (ret) {
2346                                 IWL_ERR(mvm,
2347                                         "Error draining queue before reconfig\n");
2348                                 return ret;
2349                         }
2350
2351                         ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2352                                                    mvmsta->sta_id, tid,
2353                                                    buf_size, ssn);
2354                         if (ret) {
2355                                 IWL_ERR(mvm,
2356                                         "Error reconfiguring TXQ #%d\n", queue);
2357                                 return ret;
2358                         }
2359                 }
2360         }
2361
2362         if (alloc_queue)
2363                 iwl_mvm_enable_txq(mvm, queue,
2364                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2365                                    &cfg, wdg_timeout);
2366
2367         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2368         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2369                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2370                 if (ret)
2371                         return -EIO;
2372         }
2373
2374         /* No need to mark as reserved */
2375         spin_lock_bh(&mvm->queue_info_lock);
2376         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2377         spin_unlock_bh(&mvm->queue_info_lock);
2378
2379         /*
2380          * Even though in theory the peer could have different
2381          * aggregation reorder buffer sizes for different sessions,
2382          * our ucode doesn't allow for that and has a global limit
2383          * for each station. Therefore, use the minimum of all the
2384          * aggregation sessions and our default value.
2385          */
2386         mvmsta->max_agg_bufsize =
2387                 min(mvmsta->max_agg_bufsize, buf_size);
2388         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2389
2390         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2391                      sta->addr, tid);
2392
2393         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2394 }
2395
2396 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2397                             struct ieee80211_sta *sta, u16 tid)
2398 {
2399         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2400         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2401         u16 txq_id;
2402         int err;
2403
2404         /*
2405          * If mac80211 is cleaning its state, then say that we finished since
2406          * our state has been cleared anyway.
2407          */
2408         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2409                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2410                 return 0;
2411         }
2412
2413         spin_lock_bh(&mvmsta->lock);
2414
2415         txq_id = tid_data->txq_id;
2416
2417         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2418                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2419
2420         mvmsta->agg_tids &= ~BIT(tid);
2421
2422         spin_lock_bh(&mvm->queue_info_lock);
2423         /*
2424          * The TXQ is marked as reserved only if no traffic came through yet
2425          * This means no traffic has been sent on this TID (agg'd or not), so
2426          * we no longer have use for the queue. Since it hasn't even been
2427          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2428          * free.
2429          */
2430         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2431                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2432
2433         spin_unlock_bh(&mvm->queue_info_lock);
2434
2435         switch (tid_data->state) {
2436         case IWL_AGG_ON:
2437                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2438
2439                 IWL_DEBUG_TX_QUEUES(mvm,
2440                                     "ssn = %d, next_recl = %d\n",
2441                                     tid_data->ssn, tid_data->next_reclaimed);
2442
2443                 /* There are still packets for this RA / TID in the HW */
2444                 if (tid_data->ssn != tid_data->next_reclaimed) {
2445                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2446                         err = 0;
2447                         break;
2448                 }
2449
2450                 tid_data->ssn = 0xffff;
2451                 tid_data->state = IWL_AGG_OFF;
2452                 spin_unlock_bh(&mvmsta->lock);
2453
2454                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2455
2456                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2457
2458                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2459                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2460
2461                         iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2462                 }
2463                 return 0;
2464         case IWL_AGG_STARTING:
2465         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2466                 /*
2467                  * The agg session has been stopped before it was set up. This
2468                  * can happen when the AddBA timer times out for example.
2469                  */
2470
2471                 /* No barriers since we are under mutex */
2472                 lockdep_assert_held(&mvm->mutex);
2473
2474                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2475                 tid_data->state = IWL_AGG_OFF;
2476                 err = 0;
2477                 break;
2478         default:
2479                 IWL_ERR(mvm,
2480                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2481                         mvmsta->sta_id, tid, tid_data->state);
2482                 IWL_ERR(mvm,
2483                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2484                 err = -EINVAL;
2485         }
2486
2487         spin_unlock_bh(&mvmsta->lock);
2488
2489         return err;
2490 }
2491
2492 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2493                             struct ieee80211_sta *sta, u16 tid)
2494 {
2495         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2496         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2497         u16 txq_id;
2498         enum iwl_mvm_agg_state old_state;
2499
2500         /*
2501          * First set the agg state to OFF to avoid calling
2502          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2503          */
2504         spin_lock_bh(&mvmsta->lock);
2505         txq_id = tid_data->txq_id;
2506         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2507                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2508         old_state = tid_data->state;
2509         tid_data->state = IWL_AGG_OFF;
2510         mvmsta->agg_tids &= ~BIT(tid);
2511         spin_unlock_bh(&mvmsta->lock);
2512
2513         spin_lock_bh(&mvm->queue_info_lock);
2514         /*
2515          * The TXQ is marked as reserved only if no traffic came through yet
2516          * This means no traffic has been sent on this TID (agg'd or not), so
2517          * we no longer have use for the queue. Since it hasn't even been
2518          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2519          * free.
2520          */
2521         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2522                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2523         spin_unlock_bh(&mvm->queue_info_lock);
2524
2525         if (old_state >= IWL_AGG_ON) {
2526                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2527                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2528                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2529                 iwl_trans_wait_tx_queue_empty(mvm->trans,
2530                                               mvmsta->tfd_queue_msk);
2531                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2532
2533                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2534
2535                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2536                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2537
2538                         iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2539                                             tid, 0);
2540                 }
2541         }
2542
2543         return 0;
2544 }
2545
2546 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2547 {
2548         int i, max = -1, max_offs = -1;
2549
2550         lockdep_assert_held(&mvm->mutex);
2551
2552         /* Pick the unused key offset with the highest 'deleted'
2553          * counter. Every time a key is deleted, all the counters
2554          * are incremented and the one that was just deleted is
2555          * reset to zero. Thus, the highest counter is the one
2556          * that was deleted longest ago. Pick that one.
2557          */
2558         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2559                 if (test_bit(i, mvm->fw_key_table))
2560                         continue;
2561                 if (mvm->fw_key_deleted[i] > max) {
2562                         max = mvm->fw_key_deleted[i];
2563                         max_offs = i;
2564                 }
2565         }
2566
2567         if (max_offs < 0)
2568                 return STA_KEY_IDX_INVALID;
2569
2570         return max_offs;
2571 }
2572
2573 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2574                                                struct ieee80211_vif *vif,
2575                                                struct ieee80211_sta *sta)
2576 {
2577         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2578
2579         if (sta)
2580                 return iwl_mvm_sta_from_mac80211(sta);
2581
2582         /*
2583          * The device expects GTKs for station interfaces to be
2584          * installed as GTKs for the AP station. If we have no
2585          * station ID, then use AP's station ID.
2586          */
2587         if (vif->type == NL80211_IFTYPE_STATION &&
2588             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2589                 u8 sta_id = mvmvif->ap_sta_id;
2590
2591                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2592                                             lockdep_is_held(&mvm->mutex));
2593
2594                 /*
2595                  * It is possible that the 'sta' parameter is NULL,
2596                  * for example when a GTK is removed - the sta_id will then
2597                  * be the AP ID, and no station was passed by mac80211.
2598                  */
2599                 if (IS_ERR_OR_NULL(sta))
2600                         return NULL;
2601
2602                 return iwl_mvm_sta_from_mac80211(sta);
2603         }
2604
2605         return NULL;
2606 }
2607
2608 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2609                                 struct iwl_mvm_sta *mvm_sta,
2610                                 struct ieee80211_key_conf *keyconf, bool mcast,
2611                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2612                                 u8 key_offset)
2613 {
2614         struct iwl_mvm_add_sta_key_cmd cmd = {};
2615         __le16 key_flags;
2616         int ret;
2617         u32 status;
2618         u16 keyidx;
2619         int i;
2620         u8 sta_id = mvm_sta->sta_id;
2621
2622         keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2623                  STA_KEY_FLG_KEYID_MSK;
2624         key_flags = cpu_to_le16(keyidx);
2625         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2626
2627         switch (keyconf->cipher) {
2628         case WLAN_CIPHER_SUITE_TKIP:
2629                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2630                 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
2631                 for (i = 0; i < 5; i++)
2632                         cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
2633                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2634                 break;
2635         case WLAN_CIPHER_SUITE_CCMP:
2636                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2637                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2638                 break;
2639         case WLAN_CIPHER_SUITE_WEP104:
2640                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2641                 /* fall through */
2642         case WLAN_CIPHER_SUITE_WEP40:
2643                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2644                 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
2645                 break;
2646         case WLAN_CIPHER_SUITE_GCMP_256:
2647                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2648                 /* fall through */
2649         case WLAN_CIPHER_SUITE_GCMP:
2650                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2651                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2652                 break;
2653         default:
2654                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2655                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2656         }
2657
2658         if (mcast)
2659                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2660
2661         cmd.key_offset = key_offset;
2662         cmd.key_flags = key_flags;
2663         cmd.sta_id = sta_id;
2664
2665         status = ADD_STA_SUCCESS;
2666         if (cmd_flags & CMD_ASYNC)
2667                 ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
2668                                             sizeof(cmd), &cmd);
2669         else
2670                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2671                                                   &cmd, &status);
2672
2673         switch (status) {
2674         case ADD_STA_SUCCESS:
2675                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2676                 break;
2677         default:
2678                 ret = -EIO;
2679                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
2680                 break;
2681         }
2682
2683         return ret;
2684 }
2685
2686 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
2687                                  struct ieee80211_key_conf *keyconf,
2688                                  u8 sta_id, bool remove_key)
2689 {
2690         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
2691
2692         /* verify the key details match the required command's expectations */
2693         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
2694                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
2695                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
2696                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
2697                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
2698                 return -EINVAL;
2699
2700         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
2701                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
2702                 return -EINVAL;
2703
2704         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
2705         igtk_cmd.sta_id = cpu_to_le32(sta_id);
2706
2707         if (remove_key) {
2708                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
2709         } else {
2710                 struct ieee80211_key_seq seq;
2711                 const u8 *pn;
2712
2713                 switch (keyconf->cipher) {
2714                 case WLAN_CIPHER_SUITE_AES_CMAC:
2715                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
2716                         break;
2717                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2718                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2719                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
2720                         break;
2721                 default:
2722                         return -EINVAL;
2723                 }
2724
2725                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
2726                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2727                         igtk_cmd.ctrl_flags |=
2728                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
2729                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2730                 pn = seq.aes_cmac.pn;
2731                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
2732                                                        ((u64) pn[4] << 8) |
2733                                                        ((u64) pn[3] << 16) |
2734                                                        ((u64) pn[2] << 24) |
2735                                                        ((u64) pn[1] << 32) |
2736                                                        ((u64) pn[0] << 40));
2737         }
2738
2739         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
2740                        remove_key ? "removing" : "installing",
2741                        igtk_cmd.sta_id);
2742
2743         if (!iwl_mvm_has_new_rx_api(mvm)) {
2744                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
2745                         .ctrl_flags = igtk_cmd.ctrl_flags,
2746                         .key_id = igtk_cmd.key_id,
2747                         .sta_id = igtk_cmd.sta_id,
2748                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
2749                 };
2750
2751                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
2752                        ARRAY_SIZE(igtk_cmd_v1.igtk));
2753                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2754                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
2755         }
2756         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2757                                     sizeof(igtk_cmd), &igtk_cmd);
2758 }
2759
2760
2761 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
2762                                        struct ieee80211_vif *vif,
2763                                        struct ieee80211_sta *sta)
2764 {
2765         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2766
2767         if (sta)
2768                 return sta->addr;
2769
2770         if (vif->type == NL80211_IFTYPE_STATION &&
2771             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2772                 u8 sta_id = mvmvif->ap_sta_id;
2773                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2774                                                 lockdep_is_held(&mvm->mutex));
2775                 return sta->addr;
2776         }
2777
2778
2779         return NULL;
2780 }
2781
2782 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2783                                  struct ieee80211_vif *vif,
2784                                  struct ieee80211_sta *sta,
2785                                  struct ieee80211_key_conf *keyconf,
2786                                  u8 key_offset,
2787                                  bool mcast)
2788 {
2789         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2790         int ret;
2791         const u8 *addr;
2792         struct ieee80211_key_seq seq;
2793         u16 p1k[5];
2794
2795         switch (keyconf->cipher) {
2796         case WLAN_CIPHER_SUITE_TKIP:
2797                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2798                 /* get phase 1 key from mac80211 */
2799                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2800                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2801                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2802                                            seq.tkip.iv32, p1k, 0, key_offset);
2803                 break;
2804         case WLAN_CIPHER_SUITE_CCMP:
2805         case WLAN_CIPHER_SUITE_WEP40:
2806         case WLAN_CIPHER_SUITE_WEP104:
2807         case WLAN_CIPHER_SUITE_GCMP:
2808         case WLAN_CIPHER_SUITE_GCMP_256:
2809                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2810                                            0, NULL, 0, key_offset);
2811                 break;
2812         default:
2813                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2814                                            0, NULL, 0, key_offset);
2815         }
2816
2817         return ret;
2818 }
2819
2820 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2821                                     struct ieee80211_key_conf *keyconf,
2822                                     bool mcast)
2823 {
2824         struct iwl_mvm_add_sta_key_cmd cmd = {};
2825         __le16 key_flags;
2826         int ret;
2827         u32 status;
2828
2829         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2830                                  STA_KEY_FLG_KEYID_MSK);
2831         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2832         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2833
2834         if (mcast)
2835                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2836
2837         cmd.key_flags = key_flags;
2838         cmd.key_offset = keyconf->hw_key_idx;
2839         cmd.sta_id = sta_id;
2840
2841         status = ADD_STA_SUCCESS;
2842         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2843                                           &cmd, &status);
2844
2845         switch (status) {
2846         case ADD_STA_SUCCESS:
2847                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2848                 break;
2849         default:
2850                 ret = -EIO;
2851                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2852                 break;
2853         }
2854
2855         return ret;
2856 }
2857
2858 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2859                         struct ieee80211_vif *vif,
2860                         struct ieee80211_sta *sta,
2861                         struct ieee80211_key_conf *keyconf,
2862                         u8 key_offset)
2863 {
2864         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2865         struct iwl_mvm_sta *mvm_sta;
2866         u8 sta_id;
2867         int ret;
2868         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
2869
2870         lockdep_assert_held(&mvm->mutex);
2871
2872         /* Get the station id from the mvm local station table */
2873         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2874         if (!mvm_sta) {
2875                 IWL_ERR(mvm, "Failed to find station\n");
2876                 return -EINVAL;
2877         }
2878         sta_id = mvm_sta->sta_id;
2879
2880         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2881             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2882             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
2883                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2884                 goto end;
2885         }
2886
2887         /*
2888          * It is possible that the 'sta' parameter is NULL, and thus
2889          * there is a need to retrieve  the sta from the local station table.
2890          */
2891         if (!sta) {
2892                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2893                                                 lockdep_is_held(&mvm->mutex));
2894                 if (IS_ERR_OR_NULL(sta)) {
2895                         IWL_ERR(mvm, "Invalid station id\n");
2896                         return -EINVAL;
2897                 }
2898         }
2899
2900         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2901                 return -EINVAL;
2902
2903         /* If the key_offset is not pre-assigned, we need to find a
2904          * new offset to use.  In normal cases, the offset is not
2905          * pre-assigned, but during HW_RESTART we want to reuse the
2906          * same indices, so we pass them when this function is called.
2907          *
2908          * In D3 entry, we need to hardcoded the indices (because the
2909          * firmware hardcodes the PTK offset to 0).  In this case, we
2910          * need to make sure we don't overwrite the hw_key_idx in the
2911          * keyconf structure, because otherwise we cannot configure
2912          * the original ones back when resuming.
2913          */
2914         if (key_offset == STA_KEY_IDX_INVALID) {
2915                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
2916                 if (key_offset == STA_KEY_IDX_INVALID)
2917                         return -ENOSPC;
2918                 keyconf->hw_key_idx = key_offset;
2919         }
2920
2921         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2922         if (ret)
2923                 goto end;
2924
2925         /*
2926          * For WEP, the same key is used for multicast and unicast. Upload it
2927          * again, using the same key offset, and now pointing the other one
2928          * to the same key slot (offset).
2929          * If this fails, remove the original as well.
2930          */
2931         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2932             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2933                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
2934                                             key_offset, !mcast);
2935                 if (ret) {
2936                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2937                         goto end;
2938                 }
2939         }
2940
2941         __set_bit(key_offset, mvm->fw_key_table);
2942
2943 end:
2944         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
2945                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2946                       sta ? sta->addr : zero_addr, ret);
2947         return ret;
2948 }
2949
2950 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
2951                            struct ieee80211_vif *vif,
2952                            struct ieee80211_sta *sta,
2953                            struct ieee80211_key_conf *keyconf)
2954 {
2955         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2956         struct iwl_mvm_sta *mvm_sta;
2957         u8 sta_id = IWL_MVM_STATION_COUNT;
2958         int ret, i;
2959
2960         lockdep_assert_held(&mvm->mutex);
2961
2962         /* Get the station from the mvm local station table */
2963         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2964
2965         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
2966                       keyconf->keyidx, sta_id);
2967
2968         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2969             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2970             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2971                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
2972
2973         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
2974                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
2975                         keyconf->hw_key_idx);
2976                 return -ENOENT;
2977         }
2978
2979         /* track which key was deleted last */
2980         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2981                 if (mvm->fw_key_deleted[i] < U8_MAX)
2982                         mvm->fw_key_deleted[i]++;
2983         }
2984         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
2985
2986         if (!mvm_sta) {
2987                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
2988                 return 0;
2989         }
2990
2991         sta_id = mvm_sta->sta_id;
2992
2993         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2994         if (ret)
2995                 return ret;
2996
2997         /* delete WEP key twice to get rid of (now useless) offset */
2998         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2999             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3000                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3001
3002         return ret;
3003 }
3004
3005 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3006                              struct ieee80211_vif *vif,
3007                              struct ieee80211_key_conf *keyconf,
3008                              struct ieee80211_sta *sta, u32 iv32,
3009                              u16 *phase1key)
3010 {
3011         struct iwl_mvm_sta *mvm_sta;
3012         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3013
3014         rcu_read_lock();
3015
3016         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3017         if (WARN_ON_ONCE(!mvm_sta))
3018                 goto unlock;
3019         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3020                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3021
3022  unlock:
3023         rcu_read_unlock();
3024 }
3025
3026 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3027                                 struct ieee80211_sta *sta)
3028 {
3029         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3030         struct iwl_mvm_add_sta_cmd cmd = {
3031                 .add_modify = STA_MODE_MODIFY,
3032                 .sta_id = mvmsta->sta_id,
3033                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3034                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3035         };
3036         int ret;
3037
3038         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3039                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3040         if (ret)
3041                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3042 }
3043
3044 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3045                                        struct ieee80211_sta *sta,
3046                                        enum ieee80211_frame_release_type reason,
3047                                        u16 cnt, u16 tids, bool more_data,
3048                                        bool agg)
3049 {
3050         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3051         struct iwl_mvm_add_sta_cmd cmd = {
3052                 .add_modify = STA_MODE_MODIFY,
3053                 .sta_id = mvmsta->sta_id,
3054                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3055                 .sleep_tx_count = cpu_to_le16(cnt),
3056                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3057         };
3058         int tid, ret;
3059         unsigned long _tids = tids;
3060
3061         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3062          * Note that this field is reserved and unused by firmware not
3063          * supporting GO uAPSD, so it's safe to always do this.
3064          */
3065         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3066                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3067
3068         /* If we're releasing frames from aggregation queues then check if the
3069          * all queues combined that we're releasing frames from have
3070          *  - more frames than the service period, in which case more_data
3071          *    needs to be set
3072          *  - fewer than 'cnt' frames, in which case we need to adjust the
3073          *    firmware command (but do that unconditionally)
3074          */
3075         if (agg) {
3076                 int remaining = cnt;
3077                 int sleep_tx_count;
3078
3079                 spin_lock_bh(&mvmsta->lock);
3080                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3081                         struct iwl_mvm_tid_data *tid_data;
3082                         u16 n_queued;
3083
3084                         tid_data = &mvmsta->tid_data[tid];
3085                         if (WARN(tid_data->state != IWL_AGG_ON &&
3086                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3087                                  "TID %d state is %d\n",
3088                                  tid, tid_data->state)) {
3089                                 spin_unlock_bh(&mvmsta->lock);
3090                                 ieee80211_sta_eosp(sta);
3091                                 return;
3092                         }
3093
3094                         n_queued = iwl_mvm_tid_queued(tid_data);
3095                         if (n_queued > remaining) {
3096                                 more_data = true;
3097                                 remaining = 0;
3098                                 break;
3099                         }
3100                         remaining -= n_queued;
3101                 }
3102                 sleep_tx_count = cnt - remaining;
3103                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3104                         mvmsta->sleep_tx_count = sleep_tx_count;
3105                 spin_unlock_bh(&mvmsta->lock);
3106
3107                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3108                 if (WARN_ON(cnt - remaining == 0)) {
3109                         ieee80211_sta_eosp(sta);
3110                         return;
3111                 }
3112         }
3113
3114         /* Note: this is ignored by firmware not supporting GO uAPSD */
3115         if (more_data)
3116                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
3117
3118         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3119                 mvmsta->next_status_eosp = true;
3120                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
3121         } else {
3122                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
3123         }
3124
3125         /* block the Tx queues until the FW updated the sleep Tx count */
3126         iwl_trans_block_txq_ptrs(mvm->trans, true);
3127
3128         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3129                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3130                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3131         if (ret)
3132                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3133 }
3134
3135 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3136                            struct iwl_rx_cmd_buffer *rxb)
3137 {
3138         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3139         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3140         struct ieee80211_sta *sta;
3141         u32 sta_id = le32_to_cpu(notif->sta_id);
3142
3143         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3144                 return;
3145
3146         rcu_read_lock();
3147         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3148         if (!IS_ERR_OR_NULL(sta))
3149                 ieee80211_sta_eosp(sta);
3150         rcu_read_unlock();
3151 }
3152
3153 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3154                                    struct iwl_mvm_sta *mvmsta, bool disable)
3155 {
3156         struct iwl_mvm_add_sta_cmd cmd = {
3157                 .add_modify = STA_MODE_MODIFY,
3158                 .sta_id = mvmsta->sta_id,
3159                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3160                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3161                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3162         };
3163         int ret;
3164
3165         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3166                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3167         if (ret)
3168                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3169 }
3170
3171 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3172                                       struct ieee80211_sta *sta,
3173                                       bool disable)
3174 {
3175         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3176
3177         spin_lock_bh(&mvm_sta->lock);
3178
3179         if (mvm_sta->disable_tx == disable) {
3180                 spin_unlock_bh(&mvm_sta->lock);
3181                 return;
3182         }
3183
3184         mvm_sta->disable_tx = disable;
3185
3186         /*
3187          * Tell mac80211 to start/stop queuing tx for this station,
3188          * but don't stop queuing if there are still pending frames
3189          * for this station.
3190          */
3191         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3192                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3193
3194         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3195
3196         spin_unlock_bh(&mvm_sta->lock);
3197 }
3198
3199 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3200                                        struct iwl_mvm_vif *mvmvif,
3201                                        bool disable)
3202 {
3203         struct ieee80211_sta *sta;
3204         struct iwl_mvm_sta *mvm_sta;
3205         int i;
3206
3207         lockdep_assert_held(&mvm->mutex);
3208
3209         /* Block/unblock all the stations of the given mvmvif */
3210         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3211                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3212                                                 lockdep_is_held(&mvm->mutex));
3213                 if (IS_ERR_OR_NULL(sta))
3214                         continue;
3215
3216                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3217                 if (mvm_sta->mac_id_n_color !=
3218                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3219                         continue;
3220
3221                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3222         }
3223 }
3224
3225 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3226 {
3227         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3228         struct iwl_mvm_sta *mvmsta;
3229
3230         rcu_read_lock();
3231
3232         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3233
3234         if (!WARN_ON(!mvmsta))
3235                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3236
3237         rcu_read_unlock();
3238 }