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

   1 /******************************************************************************
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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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  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         if (mvm_sta->associated)
 206                 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 207
 208         if (sta->wme) {
 209                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 210
 211                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 212                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BK);
 213                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 214                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BE);
 215                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 216                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VI);
 217                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 218                         add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VO);
 219         }
 220
 221         status = ADD_STA_SUCCESS;
 222         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 223                                           iwl_mvm_add_sta_cmd_size(mvm),
 224                                           &add_sta_cmd, &status);
 225         if (ret)
 226                 return ret;
 227
 228         switch (status & IWL_ADD_STA_STATUS_MASK) {
 229         case ADD_STA_SUCCESS:
 230                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 231                 break;
 232         default:
 233                 ret = -EIO;
 234                 IWL_ERR(mvm, "ADD_STA failed\n");
 235                 break;
 236         }
 237
 238         return ret;
 239 }
 240
 241 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
 242 {
 243         struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
 244         struct iwl_mvm_baid_data *ba_data;
 245         struct ieee80211_sta *sta;
 246         struct iwl_mvm_sta *mvm_sta;
 247         unsigned long timeout;
 248
 249         rcu_read_lock();
 250
 251         ba_data = rcu_dereference(*rcu_ptr);
 252
 253         if (WARN_ON(!ba_data))
 254                 goto unlock;
 255
 256         if (!ba_data->timeout)
 257                 goto unlock;
 258
 259         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 260         if (time_is_after_jiffies(timeout)) {
 261                 mod_timer(&ba_data->session_timer, timeout);
 262                 goto unlock;
 263         }
 264
 265         /* Timer expired */
 266         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 267         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 268         ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
 269                                           sta->addr, ba_data->tid);
 270 unlock:
 271         rcu_read_unlock();
 272 }
 273
 274 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
 275                                  struct ieee80211_sta *sta)
 276 {
 277         unsigned long used_hw_queues;
 278         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 279         unsigned int wdg_timeout =
 280                 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
 281         u32 ac;
 282
 283         lockdep_assert_held(&mvm->mutex);
 284
 285         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
 286
 287         /* Find available queues, and allocate them to the ACs */
 288         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 289                 u8 queue = find_first_zero_bit(&used_hw_queues,
 290                                                mvm->first_agg_queue);
 291
 292                 if (queue >= mvm->first_agg_queue) {
 293                         IWL_ERR(mvm, "Failed to allocate STA queue\n");
 294                         return -EBUSY;
 295                 }
 296
 297                 __set_bit(queue, &used_hw_queues);
 298                 mvmsta->hw_queue[ac] = queue;
 299         }
 300
 301         /* Found a place for all queues - enable them */
 302         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 303                 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
 304                                       mvmsta->hw_queue[ac],
 305                                       iwl_mvm_ac_to_tx_fifo[ac], 0,
 306                                       wdg_timeout);
 307                 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
 308         }
 309
 310         return 0;
 311 }
 312
 313 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
 314                                     struct ieee80211_sta *sta)
 315 {
 316         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 317         unsigned long sta_msk;
 318         int i;
 319
 320         lockdep_assert_held(&mvm->mutex);
 321
 322         /* disable the TDLS STA-specific queues */
 323         sta_msk = mvmsta->tfd_queue_msk;
 324         for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
 325                 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
 326 }
 327
 328 /* Disable aggregations for a bitmap of TIDs for a given station */
 329 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 330                                         unsigned long disable_agg_tids,
 331                                         bool remove_queue)
 332 {
 333         struct iwl_mvm_add_sta_cmd cmd = {};
 334         struct ieee80211_sta *sta;
 335         struct iwl_mvm_sta *mvmsta;
 336         u32 status;
 337         u8 sta_id;
 338         int ret;
 339
 340         spin_lock_bh(&mvm->queue_info_lock);
 341         sta_id = mvm->queue_info[queue].ra_sta_id;
 342         spin_unlock_bh(&mvm->queue_info_lock);
 343
 344         rcu_read_lock();
 345
 346         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 347
 348         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 349                 rcu_read_unlock();
 350                 return -EINVAL;
 351         }
 352
 353         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 354
 355         mvmsta->tid_disable_agg |= disable_agg_tids;
 356
 357         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 358         cmd.sta_id = mvmsta->sta_id;
 359         cmd.add_modify = STA_MODE_MODIFY;
 360         cmd.modify_mask = STA_MODIFY_QUEUES;
 361         if (disable_agg_tids)
 362                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 363         if (remove_queue)
 364                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 365         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 366         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 367
 368         rcu_read_unlock();
 369
 370         /* Notify FW of queue removal from the STA queues */
 371         status = ADD_STA_SUCCESS;
 372         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 373                                           iwl_mvm_add_sta_cmd_size(mvm),
 374                                           &cmd, &status);
 375
 376         return ret;
 377 }
 378
 379 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 380 {
 381         struct ieee80211_sta *sta;
 382         struct iwl_mvm_sta *mvmsta;
 383         unsigned long tid_bitmap;
 384         unsigned long agg_tids = 0;
 385         s8 sta_id;
 386         int tid;
 387
 388         lockdep_assert_held(&mvm->mutex);
 389
 390         spin_lock_bh(&mvm->queue_info_lock);
 391         sta_id = mvm->queue_info[queue].ra_sta_id;
 392         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 393         spin_unlock_bh(&mvm->queue_info_lock);
 394
 395         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 396                                         lockdep_is_held(&mvm->mutex));
 397
 398         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 399                 return -EINVAL;
 400
 401         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 402
 403         spin_lock_bh(&mvmsta->lock);
 404         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 405                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 406                         agg_tids |= BIT(tid);
 407         }
 408         spin_unlock_bh(&mvmsta->lock);
 409
 410         return agg_tids;
 411 }
 412
 413 /*
 414  * Remove a queue from a station's resources.
 415  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 416  * doesn't disable the queue
 417  */
 418 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 419 {
 420         struct ieee80211_sta *sta;
 421         struct iwl_mvm_sta *mvmsta;
 422         unsigned long tid_bitmap;
 423         unsigned long disable_agg_tids = 0;
 424         u8 sta_id;
 425         int tid;
 426
 427         lockdep_assert_held(&mvm->mutex);
 428
 429         spin_lock_bh(&mvm->queue_info_lock);
 430         sta_id = mvm->queue_info[queue].ra_sta_id;
 431         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 432         spin_unlock_bh(&mvm->queue_info_lock);
 433
 434         rcu_read_lock();
 435
 436         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 437
 438         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 439                 rcu_read_unlock();
 440                 return 0;
 441         }
 442
 443         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 444
 445         spin_lock_bh(&mvmsta->lock);
 446         /* Unmap MAC queues and TIDs from this queue */
 447         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 448                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 449                         disable_agg_tids |= BIT(tid);
 450                 mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
 451         }
 452
 453         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 454         spin_unlock_bh(&mvmsta->lock);
 455
 456         rcu_read_unlock();
 457
 458         return disable_agg_tids;
 459 }
 460
 461 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
 462                                        bool same_sta)
 463 {
 464         struct iwl_mvm_sta *mvmsta;
 465         u8 txq_curr_ac, sta_id, tid;
 466         unsigned long disable_agg_tids = 0;
 467         int ret;
 468
 469         lockdep_assert_held(&mvm->mutex);
 470
 471         spin_lock_bh(&mvm->queue_info_lock);
 472         txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
 473         sta_id = mvm->queue_info[queue].ra_sta_id;
 474         tid = mvm->queue_info[queue].txq_tid;
 475         spin_unlock_bh(&mvm->queue_info_lock);
 476
 477         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 478
 479         disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 480         /* Disable the queue */
 481         if (disable_agg_tids)
 482                 iwl_mvm_invalidate_sta_queue(mvm, queue,
 483                                              disable_agg_tids, false);
 484
 485         ret = iwl_mvm_disable_txq(mvm, queue,
 486                                   mvmsta->vif->hw_queue[txq_curr_ac],
 487                                   tid, 0);
 488         if (ret) {
 489                 /* Re-mark the inactive queue as inactive */
 490                 spin_lock_bh(&mvm->queue_info_lock);
 491                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
 492                 spin_unlock_bh(&mvm->queue_info_lock);
 493                 IWL_ERR(mvm,
 494                         "Failed to free inactive queue %d (ret=%d)\n",
 495                         queue, ret);
 496
 497                 return ret;
 498         }
 499
 500         /* If TXQ is allocated to another STA, update removal in FW */
 501         if (!same_sta)
 502                 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 503
 504         return 0;
 505 }
 506
 507 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 508                                     unsigned long tfd_queue_mask, u8 ac)
 509 {
 510         int queue = 0;
 511         u8 ac_to_queue[IEEE80211_NUM_ACS];
 512         int i;
 513
 514         lockdep_assert_held(&mvm->queue_info_lock);
 515
 516         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 517
 518         /* See what ACs the existing queues for this STA have */
 519         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 520                 /* Only DATA queues can be shared */
 521                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 522                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 523                         continue;
 524
 525                 /* Don't try and take queues being reconfigured */
 526                 if (mvm->queue_info[queue].status ==
 527                     IWL_MVM_QUEUE_RECONFIGURING)
 528                         continue;
 529
 530                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 531         }
 532
 533         /*
 534          * The queue to share is chosen only from DATA queues as follows (in
 535          * descending priority):
 536          * 1. An AC_BE queue
 537          * 2. Same AC queue
 538          * 3. Highest AC queue that is lower than new AC
 539          * 4. Any existing AC (there always is at least 1 DATA queue)
 540          */
 541
 542         /* Priority 1: An AC_BE queue */
 543         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 544                 queue = ac_to_queue[IEEE80211_AC_BE];
 545         /* Priority 2: Same AC queue */
 546         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 547                 queue = ac_to_queue[ac];
 548         /* Priority 3a: If new AC is VO and VI exists - use VI */
 549         else if (ac == IEEE80211_AC_VO &&
 550                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 551                 queue = ac_to_queue[IEEE80211_AC_VI];
 552         /* Priority 3b: No BE so only AC less than the new one is BK */
 553         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 554                 queue = ac_to_queue[IEEE80211_AC_BK];
 555         /* Priority 4a: No BE nor BK - use VI if exists */
 556         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 557                 queue = ac_to_queue[IEEE80211_AC_VI];
 558         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 559         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 560                 queue = ac_to_queue[IEEE80211_AC_VO];
 561
 562         /* Make sure queue found (or not) is legal */
 563         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 564             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 565             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 566                 IWL_ERR(mvm, "No DATA queues available to share\n");
 567                 return -ENOSPC;
 568         }
 569
 570         /* Make sure the queue isn't in the middle of being reconfigured */
 571         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
 572                 IWL_ERR(mvm,
 573                         "TXQ %d is in the middle of re-config - try again\n",
 574                         queue);
 575                 return -EBUSY;
 576         }
 577
 578         return queue;
 579 }
 580
 581 /*
 582  * If a given queue has a higher AC than the TID stream that is being compared
 583  * to, the queue needs to be redirected to the lower AC. This function does that
 584  * in such a case, otherwise - if no redirection required - it does nothing,
 585  * unless the %force param is true.
 586  */
 587 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
 588                                int ac, int ssn, unsigned int wdg_timeout,
 589                                bool force)
 590 {
 591         struct iwl_scd_txq_cfg_cmd cmd = {
 592                 .scd_queue = queue,
 593                 .action = SCD_CFG_DISABLE_QUEUE,
 594         };
 595         bool shared_queue;
 596         unsigned long mq;
 597         int ret;
 598
 599         /*
 600          * If the AC is lower than current one - FIFO needs to be redirected to
 601          * the lowest one of the streams in the queue. Check if this is needed
 602          * here.
 603          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 604          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 605          * we need to check if the numerical value of X is LARGER than of Y.
 606          */
 607         spin_lock_bh(&mvm->queue_info_lock);
 608         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 609                 spin_unlock_bh(&mvm->queue_info_lock);
 610
 611                 IWL_DEBUG_TX_QUEUES(mvm,
 612                                     "No redirection needed on TXQ #%d\n",
 613                                     queue);
 614                 return 0;
 615         }
 616
 617         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 618         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 619         cmd.tid = mvm->queue_info[queue].txq_tid;
 620         mq = mvm->queue_info[queue].hw_queue_to_mac80211;
 621         shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
 622         spin_unlock_bh(&mvm->queue_info_lock);
 623
 624         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 625                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 626
 627         /* Stop MAC queues and wait for this queue to empty */
 628         iwl_mvm_stop_mac_queues(mvm, mq);
 629         ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue));
 630         if (ret) {
 631                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 632                         queue);
 633                 ret = -EIO;
 634                 goto out;
 635         }
 636
 637         /* Before redirecting the queue we need to de-activate it */
 638         iwl_trans_txq_disable(mvm->trans, queue, false);
 639         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 640         if (ret)
 641                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 642                         ret);
 643
 644         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 645         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 646
 647         /* Update the TID "owner" of the queue */
 648         spin_lock_bh(&mvm->queue_info_lock);
 649         mvm->queue_info[queue].txq_tid = tid;
 650         spin_unlock_bh(&mvm->queue_info_lock);
 651
 652         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 653
 654         /* Redirect to lower AC */
 655         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 656                              cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
 657                              ssn);
 658
 659         /* Update AC marking of the queue */
 660         spin_lock_bh(&mvm->queue_info_lock);
 661         mvm->queue_info[queue].mac80211_ac = ac;
 662         spin_unlock_bh(&mvm->queue_info_lock);
 663
 664         /*
 665          * Mark queue as shared in transport if shared
 666          * Note this has to be done after queue enablement because enablement
 667          * can also set this value, and there is no indication there to shared
 668          * queues
 669          */
 670         if (shared_queue)
 671                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 672
 673 out:
 674         /* Continue using the MAC queues */
 675         iwl_mvm_start_mac_queues(mvm, mq);
 676
 677         return ret;
 678 }
 679
 680 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
 681                                    struct ieee80211_sta *sta, u8 ac, int tid,
 682                                    struct ieee80211_hdr *hdr)
 683 {
 684         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 685         struct iwl_trans_txq_scd_cfg cfg = {
 686                 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
 687                 .sta_id = mvmsta->sta_id,
 688                 .tid = tid,
 689                 .frame_limit = IWL_FRAME_LIMIT,
 690         };
 691         unsigned int wdg_timeout =
 692                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 693         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 694         int queue = -1;
 695         bool using_inactive_queue = false, same_sta = false;
 696         unsigned long disable_agg_tids = 0;
 697         enum iwl_mvm_agg_state queue_state;
 698         bool shared_queue = false;
 699         int ssn;
 700         unsigned long tfd_queue_mask;
 701         int ret;
 702
 703         lockdep_assert_held(&mvm->mutex);
 704
 705         spin_lock_bh(&mvmsta->lock);
 706         tfd_queue_mask = mvmsta->tfd_queue_msk;
 707         spin_unlock_bh(&mvmsta->lock);
 708
 709         spin_lock_bh(&mvm->queue_info_lock);
 710
 711         /*
 712          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
 713          * exists
 714          */
 715         if (!ieee80211_is_data_qos(hdr->frame_control) ||
 716             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 717                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 718                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
 719                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
 720                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
 721                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
 722                                             queue);
 723
 724                 /* If no such queue is found, we'll use a DATA queue instead */
 725         }
 726
 727         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
 728             (mvm->queue_info[mvmsta->reserved_queue].status ==
 729              IWL_MVM_QUEUE_RESERVED ||
 730              mvm->queue_info[mvmsta->reserved_queue].status ==
 731              IWL_MVM_QUEUE_INACTIVE)) {
 732                 queue = mvmsta->reserved_queue;
 733                 mvm->queue_info[queue].reserved = true;
 734                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
 735         }
 736
 737         if (queue < 0)
 738                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 739                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
 740                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 741
 742         /*
 743          * Check if this queue is already allocated but inactive.
 744          * In such a case, we'll need to first free this queue before enabling
 745          * it again, so we'll mark it as reserved to make sure no new traffic
 746          * arrives on it
 747          */
 748         if (queue > 0 &&
 749             mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
 750                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
 751                 using_inactive_queue = true;
 752                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
 753                 IWL_DEBUG_TX_QUEUES(mvm,
 754                                     "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
 755                                     queue, mvmsta->sta_id, tid);
 756         }
 757
 758         /* No free queue - we'll have to share */
 759         if (queue <= 0) {
 760                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
 761                 if (queue > 0) {
 762                         shared_queue = true;
 763                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
 764                 }
 765         }
 766
 767         /*
 768          * Mark TXQ as ready, even though it hasn't been fully configured yet,
 769          * to make sure no one else takes it.
 770          * This will allow avoiding re-acquiring the lock at the end of the
 771          * configuration. On error we'll mark it back as free.
 772          */
 773         if ((queue > 0) && !shared_queue)
 774                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 775
 776         spin_unlock_bh(&mvm->queue_info_lock);
 777
 778         /* This shouldn't happen - out of queues */
 779         if (WARN_ON(queue <= 0)) {
 780                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
 781                         tid, cfg.sta_id);
 782                 return queue;
 783         }
 784
 785         /*
 786          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
 787          * but for configuring the SCD to send A-MPDUs we need to mark the queue
 788          * as aggregatable.
 789          * Mark all DATA queues as allowing to be aggregated at some point
 790          */
 791         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 792                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
 793
 794         /*
 795          * If this queue was previously inactive (idle) - we need to free it
 796          * first
 797          */
 798         if (using_inactive_queue) {
 799                 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
 800                 if (ret)
 801                         return ret;
 802         }
 803
 804         IWL_DEBUG_TX_QUEUES(mvm,
 805                             "Allocating %squeue #%d to sta %d on tid %d\n",
 806                             shared_queue ? "shared " : "", queue,
 807                             mvmsta->sta_id, tid);
 808
 809         if (shared_queue) {
 810                 /* Disable any open aggs on this queue */
 811                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
 812
 813                 if (disable_agg_tids) {
 814                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
 815                                             queue);
 816                         iwl_mvm_invalidate_sta_queue(mvm, queue,
 817                                                      disable_agg_tids, false);
 818                 }
 819         }
 820
 821         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 822         iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
 823                            wdg_timeout);
 824
 825         /*
 826          * Mark queue as shared in transport if shared
 827          * Note this has to be done after queue enablement because enablement
 828          * can also set this value, and there is no indication there to shared
 829          * queues
 830          */
 831         if (shared_queue)
 832                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 833
 834         spin_lock_bh(&mvmsta->lock);
 835         mvmsta->tid_data[tid].txq_id = queue;
 836         mvmsta->tid_data[tid].is_tid_active = true;
 837         mvmsta->tfd_queue_msk |= BIT(queue);
 838         queue_state = mvmsta->tid_data[tid].state;
 839
 840         if (mvmsta->reserved_queue == queue)
 841                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
 842         spin_unlock_bh(&mvmsta->lock);
 843
 844         if (!shared_queue) {
 845                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
 846                 if (ret)
 847                         goto out_err;
 848
 849                 /* If we need to re-enable aggregations... */
 850                 if (queue_state == IWL_AGG_ON) {
 851                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
 852                         if (ret)
 853                                 goto out_err;
 854                 }
 855         } else {
 856                 /* Redirect queue, if needed */
 857                 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
 858                                                  wdg_timeout, false);
 859                 if (ret)
 860                         goto out_err;
 861         }
 862
 863         return 0;
 864
 865 out_err:
 866         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
 867
 868         return ret;
 869 }
 870
 871 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
 872 {
 873         struct iwl_scd_txq_cfg_cmd cmd = {
 874                 .scd_queue = queue,
 875                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 876         };
 877         int tid;
 878         unsigned long tid_bitmap;
 879         int ret;
 880
 881         lockdep_assert_held(&mvm->mutex);
 882
 883         spin_lock_bh(&mvm->queue_info_lock);
 884         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 885         spin_unlock_bh(&mvm->queue_info_lock);
 886
 887         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 888                 return;
 889
 890         /* Find any TID for queue */
 891         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 892         cmd.tid = tid;
 893         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 894
 895         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 896         if (ret) {
 897                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 898                         queue, ret);
 899                 return;
 900         }
 901
 902         spin_lock_bh(&mvm->queue_info_lock);
 903         mvm->queue_info[queue].txq_tid = tid;
 904         spin_unlock_bh(&mvm->queue_info_lock);
 905         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 906                             queue, tid);
 907 }
 908
 909 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
 910 {
 911         struct ieee80211_sta *sta;
 912         struct iwl_mvm_sta *mvmsta;
 913         s8 sta_id;
 914         int tid = -1;
 915         unsigned long tid_bitmap;
 916         unsigned int wdg_timeout;
 917         int ssn;
 918         int ret = true;
 919
 920         lockdep_assert_held(&mvm->mutex);
 921
 922         spin_lock_bh(&mvm->queue_info_lock);
 923         sta_id = mvm->queue_info[queue].ra_sta_id;
 924         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 925         spin_unlock_bh(&mvm->queue_info_lock);
 926
 927         /* Find TID for queue, and make sure it is the only one on the queue */
 928         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 929         if (tid_bitmap != BIT(tid)) {
 930                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
 931                         queue, tid_bitmap);
 932                 return;
 933         }
 934
 935         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
 936                             tid);
 937
 938         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 939                                         lockdep_is_held(&mvm->mutex));
 940
 941         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 942                 return;
 943
 944         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 945         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 946
 947         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
 948
 949         ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
 950                                          tid_to_mac80211_ac[tid], ssn,
 951                                          wdg_timeout, true);
 952         if (ret) {
 953                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
 954                 return;
 955         }
 956
 957         /* If aggs should be turned back on - do it */
 958         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
 959                 struct iwl_mvm_add_sta_cmd cmd = {0};
 960
 961                 mvmsta->tid_disable_agg &= ~BIT(tid);
 962
 963                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 964                 cmd.sta_id = mvmsta->sta_id;
 965                 cmd.add_modify = STA_MODE_MODIFY;
 966                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
 967                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 968                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 969
 970                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
 971                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
 972                 if (!ret) {
 973                         IWL_DEBUG_TX_QUEUES(mvm,
 974                                             "TXQ #%d is now aggregated again\n",
 975                                             queue);
 976
 977                         /* Mark queue intenally as aggregating again */
 978                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
 979                 }
 980         }
 981
 982         spin_lock_bh(&mvm->queue_info_lock);
 983         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 984         spin_unlock_bh(&mvm->queue_info_lock);
 985 }
 986
 987 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
 988 {
 989         if (tid == IWL_MAX_TID_COUNT)
 990                 return IEEE80211_AC_VO; /* MGMT */
 991
 992         return tid_to_mac80211_ac[tid];
 993 }
 994
 995 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
 996                                        struct ieee80211_sta *sta, int tid)
 997 {
 998         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 999         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1000         struct sk_buff *skb;
1001         struct ieee80211_hdr *hdr;
1002         struct sk_buff_head deferred_tx;
1003         u8 mac_queue;
1004         bool no_queue = false; /* Marks if there is a problem with the queue */
1005         u8 ac;
1006
1007         lockdep_assert_held(&mvm->mutex);
1008
1009         skb = skb_peek(&tid_data->deferred_tx_frames);
1010         if (!skb)
1011                 return;
1012         hdr = (void *)skb->data;
1013
1014         ac = iwl_mvm_tid_to_ac_queue(tid);
1015         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1016
1017         if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
1018             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1019                 IWL_ERR(mvm,
1020                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1021                         mvmsta->sta_id, tid);
1022
1023                 /*
1024                  * Mark queue as problematic so later the deferred traffic is
1025                  * freed, as we can do nothing with it
1026                  */
1027                 no_queue = true;
1028         }
1029
1030         __skb_queue_head_init(&deferred_tx);
1031
1032         /* Disable bottom-halves when entering TX path */
1033         local_bh_disable();
1034         spin_lock(&mvmsta->lock);
1035         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1036         mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1037         spin_unlock(&mvmsta->lock);
1038
1039         while ((skb = __skb_dequeue(&deferred_tx)))
1040                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1041                         ieee80211_free_txskb(mvm->hw, skb);
1042         local_bh_enable();
1043
1044         /* Wake queue */
1045         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1046 }
1047
1048 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1049 {
1050         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1051                                            add_stream_wk);
1052         struct ieee80211_sta *sta;
1053         struct iwl_mvm_sta *mvmsta;
1054         unsigned long deferred_tid_traffic;
1055         int queue, sta_id, tid;
1056
1057         /* Check inactivity of queues */
1058         iwl_mvm_inactivity_check(mvm);
1059
1060         mutex_lock(&mvm->mutex);
1061
1062         /* Reconfigure queues requiring reconfiguation */
1063         for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
1064                 bool reconfig;
1065                 bool change_owner;
1066
1067                 spin_lock_bh(&mvm->queue_info_lock);
1068                 reconfig = (mvm->queue_info[queue].status ==
1069                             IWL_MVM_QUEUE_RECONFIGURING);
1070
1071                 /*
1072                  * We need to take into account a situation in which a TXQ was
1073                  * allocated to TID x, and then turned shared by adding TIDs y
1074                  * and z. If TID x becomes inactive and is removed from the TXQ,
1075                  * ownership must be given to one of the remaining TIDs.
1076                  * This is mainly because if TID x continues - a new queue can't
1077                  * be allocated for it as long as it is an owner of another TXQ.
1078                  */
1079                 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1080                                  BIT(mvm->queue_info[queue].txq_tid)) &&
1081                                (mvm->queue_info[queue].status ==
1082                                 IWL_MVM_QUEUE_SHARED);
1083                 spin_unlock_bh(&mvm->queue_info_lock);
1084
1085                 if (reconfig)
1086                         iwl_mvm_unshare_queue(mvm, queue);
1087                 else if (change_owner)
1088                         iwl_mvm_change_queue_owner(mvm, queue);
1089         }
1090
1091         /* Go over all stations with deferred traffic */
1092         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1093                          IWL_MVM_STATION_COUNT) {
1094                 clear_bit(sta_id, mvm->sta_deferred_frames);
1095                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1096                                                 lockdep_is_held(&mvm->mutex));
1097                 if (IS_ERR_OR_NULL(sta))
1098                         continue;
1099
1100                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1101                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1102
1103                 for_each_set_bit(tid, &deferred_tid_traffic,
1104                                  IWL_MAX_TID_COUNT + 1)
1105                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1106         }
1107
1108         mutex_unlock(&mvm->mutex);
1109 }
1110
1111 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1112                                       struct ieee80211_sta *sta,
1113                                       enum nl80211_iftype vif_type)
1114 {
1115         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1116         int queue;
1117         bool using_inactive_queue = false, same_sta = false;
1118
1119         /*
1120          * Check for inactive queues, so we don't reach a situation where we
1121          * can't add a STA due to a shortage in queues that doesn't really exist
1122          */
1123         iwl_mvm_inactivity_check(mvm);
1124
1125         spin_lock_bh(&mvm->queue_info_lock);
1126
1127         /* Make sure we have free resources for this STA */
1128         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1129             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1130             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1131              IWL_MVM_QUEUE_FREE))
1132                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1133         else
1134                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1135                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1136                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1137         if (queue < 0) {
1138                 spin_unlock_bh(&mvm->queue_info_lock);
1139                 IWL_ERR(mvm, "No available queues for new station\n");
1140                 return -ENOSPC;
1141         } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1142                 /*
1143                  * If this queue is already allocated but inactive we'll need to
1144                  * first free this queue before enabling it again, we'll mark
1145                  * it as reserved to make sure no new traffic arrives on it
1146                  */
1147                 using_inactive_queue = true;
1148                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1149         }
1150         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1151
1152         spin_unlock_bh(&mvm->queue_info_lock);
1153
1154         mvmsta->reserved_queue = queue;
1155
1156         if (using_inactive_queue)
1157                 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1158
1159         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1160                             queue, mvmsta->sta_id);
1161
1162         return 0;
1163 }
1164
1165 /*
1166  * In DQA mode, after a HW restart the queues should be allocated as before, in
1167  * order to avoid race conditions when there are shared queues. This function
1168  * does the re-mapping and queue allocation.
1169  *
1170  * Note that re-enabling aggregations isn't done in this function.
1171  */
1172 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1173                                                  struct iwl_mvm_sta *mvm_sta)
1174 {
1175         unsigned int wdg_timeout =
1176                         iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1177         int i;
1178         struct iwl_trans_txq_scd_cfg cfg = {
1179                 .sta_id = mvm_sta->sta_id,
1180                 .frame_limit = IWL_FRAME_LIMIT,
1181         };
1182
1183         /* Make sure reserved queue is still marked as such (if allocated) */
1184         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1185                 mvm->queue_info[mvm_sta->reserved_queue].status =
1186                         IWL_MVM_QUEUE_RESERVED;
1187
1188         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1189                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1190                 int txq_id = tid_data->txq_id;
1191                 int ac;
1192                 u8 mac_queue;
1193
1194                 if (txq_id == IEEE80211_INVAL_HW_QUEUE)
1195                         continue;
1196
1197                 skb_queue_head_init(&tid_data->deferred_tx_frames);
1198
1199                 ac = tid_to_mac80211_ac[i];
1200                 mac_queue = mvm_sta->vif->hw_queue[ac];
1201
1202                 cfg.tid = i;
1203                 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
1204                 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1205                                  txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1206
1207                 IWL_DEBUG_TX_QUEUES(mvm,
1208                                     "Re-mapping sta %d tid %d to queue %d\n",
1209                                     mvm_sta->sta_id, i, txq_id);
1210
1211                 iwl_mvm_enable_txq(mvm, txq_id, mac_queue,
1212                                    IEEE80211_SEQ_TO_SN(tid_data->seq_number),
1213                                    &cfg, wdg_timeout);
1214
1215                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1216         }
1217
1218         atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
1219 }
1220
1221 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1222                     struct ieee80211_vif *vif,
1223                     struct ieee80211_sta *sta)
1224 {
1225         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1226         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1227         struct iwl_mvm_rxq_dup_data *dup_data;
1228         int i, ret, sta_id;
1229
1230         lockdep_assert_held(&mvm->mutex);
1231
1232         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1233                 sta_id = iwl_mvm_find_free_sta_id(mvm,
1234                                                   ieee80211_vif_type_p2p(vif));
1235         else
1236                 sta_id = mvm_sta->sta_id;
1237
1238         if (sta_id == IWL_MVM_STATION_COUNT)
1239                 return -ENOSPC;
1240
1241         spin_lock_init(&mvm_sta->lock);
1242
1243         /* In DQA mode, if this is a HW restart, re-alloc existing queues */
1244         if (iwl_mvm_is_dqa_supported(mvm) &&
1245             test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1246                 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1247                 goto update_fw;
1248         }
1249
1250         mvm_sta->sta_id = sta_id;
1251         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1252                                                       mvmvif->color);
1253         mvm_sta->vif = vif;
1254         mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1255         mvm_sta->tx_protection = 0;
1256         mvm_sta->tt_tx_protection = false;
1257
1258         /* HW restart, don't assume the memory has been zeroed */
1259         atomic_set(&mvm->pending_frames[sta_id], 0);
1260         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1261         mvm_sta->tfd_queue_msk = 0;
1262
1263         /*
1264          * Allocate new queues for a TDLS station, unless we're in DQA mode,
1265          * and then they'll be allocated dynamically
1266          */
1267         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1268                 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1269                 if (ret)
1270                         return ret;
1271         } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1272                 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1273                         if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1274                                 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1275         }
1276
1277         /* for HW restart - reset everything but the sequence number */
1278         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1279                 u16 seq = mvm_sta->tid_data[i].seq_number;
1280                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1281                 mvm_sta->tid_data[i].seq_number = seq;
1282
1283                 if (!iwl_mvm_is_dqa_supported(mvm))
1284                         continue;
1285
1286                 /*
1287                  * Mark all queues for this STA as unallocated and defer TX
1288                  * frames until the queue is allocated
1289                  */
1290                 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1291                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1292         }
1293         mvm_sta->deferred_traffic_tid_map = 0;
1294         mvm_sta->agg_tids = 0;
1295
1296         if (iwl_mvm_has_new_rx_api(mvm) &&
1297             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1298                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1299                                    sizeof(*dup_data),
1300                                    GFP_KERNEL);
1301                 if (!dup_data)
1302                         return -ENOMEM;
1303                 mvm_sta->dup_data = dup_data;
1304         }
1305
1306         if (iwl_mvm_is_dqa_supported(mvm)) {
1307                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1308                                                  ieee80211_vif_type_p2p(vif));
1309                 if (ret)
1310                         goto err;
1311         }
1312
1313 update_fw:
1314         ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1315         if (ret)
1316                 goto err;
1317
1318         if (vif->type == NL80211_IFTYPE_STATION) {
1319                 if (!sta->tdls) {
1320                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
1321                         mvmvif->ap_sta_id = sta_id;
1322                 } else {
1323                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
1324                 }
1325         }
1326
1327         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1328
1329         return 0;
1330
1331 err:
1332         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1333                 iwl_mvm_tdls_sta_deinit(mvm, sta);
1334         return ret;
1335 }
1336
1337 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1338                       bool drain)
1339 {
1340         struct iwl_mvm_add_sta_cmd cmd = {};
1341         int ret;
1342         u32 status;
1343
1344         lockdep_assert_held(&mvm->mutex);
1345
1346         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1347         cmd.sta_id = mvmsta->sta_id;
1348         cmd.add_modify = STA_MODE_MODIFY;
1349         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1350         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1351
1352         status = ADD_STA_SUCCESS;
1353         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1354                                           iwl_mvm_add_sta_cmd_size(mvm),
1355                                           &cmd, &status);
1356         if (ret)
1357                 return ret;
1358
1359         switch (status & IWL_ADD_STA_STATUS_MASK) {
1360         case ADD_STA_SUCCESS:
1361                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1362                                mvmsta->sta_id);
1363                 break;
1364         default:
1365                 ret = -EIO;
1366                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1367                         mvmsta->sta_id);
1368                 break;
1369         }
1370
1371         return ret;
1372 }
1373
1374 /*
1375  * Remove a station from the FW table. Before sending the command to remove
1376  * the station validate that the station is indeed known to the driver (sanity
1377  * only).
1378  */
1379 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1380 {
1381         struct ieee80211_sta *sta;
1382         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1383                 .sta_id = sta_id,
1384         };
1385         int ret;
1386
1387         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1388                                         lockdep_is_held(&mvm->mutex));
1389
1390         /* Note: internal stations are marked as error values */
1391         if (!sta) {
1392                 IWL_ERR(mvm, "Invalid station id\n");
1393                 return -EINVAL;
1394         }
1395
1396         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1397                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1398         if (ret) {
1399                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1400                 return ret;
1401         }
1402
1403         return 0;
1404 }
1405
1406 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1407 {
1408         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1409         u8 sta_id;
1410
1411         /*
1412          * The mutex is needed because of the SYNC cmd, but not only: if the
1413          * work would run concurrently with iwl_mvm_rm_sta, it would run before
1414          * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1415          * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1416          * that later.
1417          */
1418         mutex_lock(&mvm->mutex);
1419
1420         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1421                 int ret;
1422                 struct ieee80211_sta *sta =
1423                         rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1424                                                   lockdep_is_held(&mvm->mutex));
1425
1426                 /*
1427                  * This station is in use or RCU-removed; the latter happens in
1428                  * managed mode, where mac80211 removes the station before we
1429                  * can remove it from firmware (we can only do that after the
1430                  * MAC is marked unassociated), and possibly while the deauth
1431                  * frame to disconnect from the AP is still queued. Then, the
1432                  * station pointer is -ENOENT when the last skb is reclaimed.
1433                  */
1434                 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1435                         continue;
1436
1437                 if (PTR_ERR(sta) == -EINVAL) {
1438                         IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1439                                 sta_id);
1440                         continue;
1441                 }
1442
1443                 if (!sta) {
1444                         IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1445                                 sta_id);
1446                         continue;
1447                 }
1448
1449                 WARN_ON(PTR_ERR(sta) != -EBUSY);
1450                 /* This station was removed and we waited until it got drained,
1451                  * we can now proceed and remove it.
1452                  */
1453                 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1454                 if (ret) {
1455                         IWL_ERR(mvm,
1456                                 "Couldn't remove sta %d after it was drained\n",
1457                                 sta_id);
1458                         continue;
1459                 }
1460                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1461                 clear_bit(sta_id, mvm->sta_drained);
1462
1463                 if (mvm->tfd_drained[sta_id]) {
1464                         unsigned long i, msk = mvm->tfd_drained[sta_id];
1465
1466                         for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1467                                 iwl_mvm_disable_txq(mvm, i, i,
1468                                                     IWL_MAX_TID_COUNT, 0);
1469
1470                         mvm->tfd_drained[sta_id] = 0;
1471                         IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1472                                        sta_id, msk);
1473                 }
1474         }
1475
1476         mutex_unlock(&mvm->mutex);
1477 }
1478
1479 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1480                                        struct ieee80211_vif *vif,
1481                                        struct iwl_mvm_sta *mvm_sta)
1482 {
1483         int ac;
1484         int i;
1485
1486         lockdep_assert_held(&mvm->mutex);
1487
1488         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1489                 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
1490                         continue;
1491
1492                 ac = iwl_mvm_tid_to_ac_queue(i);
1493                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1494                                     vif->hw_queue[ac], i, 0);
1495                 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1496         }
1497 }
1498
1499 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1500                    struct ieee80211_vif *vif,
1501                    struct ieee80211_sta *sta)
1502 {
1503         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1504         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1505         u8 sta_id = mvm_sta->sta_id;
1506         int ret;
1507
1508         lockdep_assert_held(&mvm->mutex);
1509
1510         if (iwl_mvm_has_new_rx_api(mvm))
1511                 kfree(mvm_sta->dup_data);
1512
1513         if ((vif->type == NL80211_IFTYPE_STATION &&
1514              mvmvif->ap_sta_id == sta_id) ||
1515             iwl_mvm_is_dqa_supported(mvm)){
1516                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1517                 if (ret)
1518                         return ret;
1519                 /* flush its queues here since we are freeing mvm_sta */
1520                 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1521                 if (ret)
1522                         return ret;
1523                 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1524                                                     mvm_sta->tfd_queue_msk);
1525                 if (ret)
1526                         return ret;
1527                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1528
1529                 /* If DQA is supported - the queues can be disabled now */
1530                 if (iwl_mvm_is_dqa_supported(mvm)) {
1531                         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1532                         /*
1533                          * If pending_frames is set at this point - it must be
1534                          * driver internal logic error, since queues are empty
1535                          * and removed successuly.
1536                          * warn on it but set it to 0 anyway to avoid station
1537                          * not being removed later in the function
1538                          */
1539                         WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0));
1540                 }
1541
1542                 /* If there is a TXQ still marked as reserved - free it */
1543                 if (iwl_mvm_is_dqa_supported(mvm) &&
1544                     mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1545                         u8 reserved_txq = mvm_sta->reserved_queue;
1546                         enum iwl_mvm_queue_status *status;
1547
1548                         /*
1549                          * If no traffic has gone through the reserved TXQ - it
1550                          * is still marked as IWL_MVM_QUEUE_RESERVED, and
1551                          * should be manually marked as free again
1552                          */
1553                         spin_lock_bh(&mvm->queue_info_lock);
1554                         status = &mvm->queue_info[reserved_txq].status;
1555                         if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1556                                  (*status != IWL_MVM_QUEUE_FREE),
1557                                  "sta_id %d reserved txq %d status %d",
1558                                  sta_id, reserved_txq, *status)) {
1559                                 spin_unlock_bh(&mvm->queue_info_lock);
1560                                 return -EINVAL;
1561                         }
1562
1563                         *status = IWL_MVM_QUEUE_FREE;
1564                         spin_unlock_bh(&mvm->queue_info_lock);
1565                 }
1566
1567                 if (vif->type == NL80211_IFTYPE_STATION &&
1568                     mvmvif->ap_sta_id == sta_id) {
1569                         /* if associated - we can't remove the AP STA now */
1570                         if (vif->bss_conf.assoc)
1571                                 return ret;
1572
1573                         /* unassoc - go ahead - remove the AP STA now */
1574                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1575
1576                         /* clear d0i3_ap_sta_id if no longer relevant */
1577                         if (mvm->d0i3_ap_sta_id == sta_id)
1578                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1579                 }
1580         }
1581
1582         /*
1583          * This shouldn't happen - the TDLS channel switch should be canceled
1584          * before the STA is removed.
1585          */
1586         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1587                 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
1588                 cancel_delayed_work(&mvm->tdls_cs.dwork);
1589         }
1590
1591         /*
1592          * Make sure that the tx response code sees the station as -EBUSY and
1593          * calls the drain worker.
1594          */
1595         spin_lock_bh(&mvm_sta->lock);
1596
1597         /*
1598          * There are frames pending on the AC queues for this station.
1599          * We need to wait until all the frames are drained...
1600          */
1601         if (atomic_read(&mvm->pending_frames[sta_id])) {
1602                 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id],
1603                                    ERR_PTR(-EBUSY));
1604                 spin_unlock_bh(&mvm_sta->lock);
1605
1606                 /* disable TDLS sta queues on drain complete */
1607                 if (sta->tdls) {
1608                         mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk;
1609                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id);
1610                 }
1611
1612                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1613         } else {
1614                 spin_unlock_bh(&mvm_sta->lock);
1615
1616                 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1617                         iwl_mvm_tdls_sta_deinit(mvm, sta);
1618
1619                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1620                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1621         }
1622
1623         return ret;
1624 }
1625
1626 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1627                       struct ieee80211_vif *vif,
1628                       u8 sta_id)
1629 {
1630         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1631
1632         lockdep_assert_held(&mvm->mutex);
1633
1634         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1635         return ret;
1636 }
1637
1638 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1639                              struct iwl_mvm_int_sta *sta,
1640                              u32 qmask, enum nl80211_iftype iftype)
1641 {
1642         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1643                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1644                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
1645                         return -ENOSPC;
1646         }
1647
1648         sta->tfd_queue_msk = qmask;
1649
1650         /* put a non-NULL value so iterating over the stations won't stop */
1651         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1652         return 0;
1653 }
1654
1655 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
1656                                     struct iwl_mvm_int_sta *sta)
1657 {
1658         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1659         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1660         sta->sta_id = IWL_MVM_STATION_COUNT;
1661 }
1662
1663 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1664                                       struct iwl_mvm_int_sta *sta,
1665                                       const u8 *addr,
1666                                       u16 mac_id, u16 color)
1667 {
1668         struct iwl_mvm_add_sta_cmd cmd;
1669         int ret;
1670         u32 status;
1671
1672         lockdep_assert_held(&mvm->mutex);
1673
1674         memset(&cmd, 0, sizeof(cmd));
1675         cmd.sta_id = sta->sta_id;
1676         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1677                                                              color));
1678
1679         cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1680         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1681
1682         if (addr)
1683                 memcpy(cmd.addr, addr, ETH_ALEN);
1684
1685         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1686                                           iwl_mvm_add_sta_cmd_size(mvm),
1687                                           &cmd, &status);
1688         if (ret)
1689                 return ret;
1690
1691         switch (status & IWL_ADD_STA_STATUS_MASK) {
1692         case ADD_STA_SUCCESS:
1693                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1694                 return 0;
1695         default:
1696                 ret = -EIO;
1697                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1698                         status);
1699                 break;
1700         }
1701         return ret;
1702 }
1703
1704 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1705 {
1706         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1707                                         mvm->cfg->base_params->wd_timeout :
1708                                         IWL_WATCHDOG_DISABLED;
1709         int ret;
1710
1711         lockdep_assert_held(&mvm->mutex);
1712
1713         /* Map Aux queue to fifo - needs to happen before adding Aux station */
1714         if (!iwl_mvm_is_dqa_supported(mvm))
1715                 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1716                                       IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1717
1718         /* Allocate aux station and assign to it the aux queue */
1719         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1720                                        NL80211_IFTYPE_UNSPECIFIED);
1721         if (ret)
1722                 return ret;
1723
1724         if (iwl_mvm_is_dqa_supported(mvm)) {
1725                 struct iwl_trans_txq_scd_cfg cfg = {
1726                         .fifo = IWL_MVM_TX_FIFO_MCAST,
1727                         .sta_id = mvm->aux_sta.sta_id,
1728                         .tid = IWL_MAX_TID_COUNT,
1729                         .aggregate = false,
1730                         .frame_limit = IWL_FRAME_LIMIT,
1731                 };
1732
1733                 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1734                                    wdg_timeout);
1735         }
1736
1737         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1738                                          MAC_INDEX_AUX, 0);
1739
1740         if (ret)
1741                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1742         return ret;
1743 }
1744
1745 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1746 {
1747         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1748
1749         lockdep_assert_held(&mvm->mutex);
1750         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1751                                          mvmvif->id, 0);
1752 }
1753
1754 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1755 {
1756         int ret;
1757
1758         lockdep_assert_held(&mvm->mutex);
1759
1760         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1761         if (ret)
1762                 IWL_WARN(mvm, "Failed sending remove station\n");
1763
1764         return ret;
1765 }
1766
1767 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1768 {
1769         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1770 }
1771
1772 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1773 {
1774         lockdep_assert_held(&mvm->mutex);
1775
1776         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1777 }
1778
1779 /*
1780  * Send the add station command for the vif's broadcast station.
1781  * Assumes that the station was already allocated.
1782  *
1783  * @mvm: the mvm component
1784  * @vif: the interface to which the broadcast station is added
1785  * @bsta: the broadcast station to add.
1786  */
1787 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1788 {
1789         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1790         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1791         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1792         const u8 *baddr = _baddr;
1793         int ret;
1794
1795         lockdep_assert_held(&mvm->mutex);
1796
1797         if (iwl_mvm_is_dqa_supported(mvm)) {
1798                 struct iwl_trans_txq_scd_cfg cfg = {
1799                         .fifo = IWL_MVM_TX_FIFO_VO,
1800                         .sta_id = mvmvif->bcast_sta.sta_id,
1801                         .tid = IWL_MAX_TID_COUNT,
1802                         .aggregate = false,
1803                         .frame_limit = IWL_FRAME_LIMIT,
1804                 };
1805                 unsigned int wdg_timeout =
1806                         iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1807                 int queue;
1808
1809                 if (vif->type == NL80211_IFTYPE_AP)
1810                         queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1811                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1812                         queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1813                 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1814                         return -EINVAL;
1815
1816                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1817                                    wdg_timeout);
1818                 bsta->tfd_queue_msk |= BIT(queue);
1819         }
1820
1821         if (vif->type == NL80211_IFTYPE_ADHOC)
1822                 baddr = vif->bss_conf.bssid;
1823
1824         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1825                 return -ENOSPC;
1826
1827         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1828                                          mvmvif->id, mvmvif->color);
1829         if (ret)
1830                 return ret;
1831
1832         /*
1833          * In AP vif type, we also need to enable the cab_queue. However, we
1834          * have to enable it after the ADD_STA command is sent, otherwise the
1835          * FW will throw an assert once we send the ADD_STA command (it'll
1836          * detect a mismatch in the tfd_queue_msk, as we can't add the
1837          * enabled-cab_queue to the mask)
1838          */
1839         if (iwl_mvm_is_dqa_supported(mvm) &&
1840             vif->type == NL80211_IFTYPE_AP) {
1841                 struct iwl_trans_txq_scd_cfg cfg = {
1842                         .fifo = IWL_MVM_TX_FIFO_MCAST,
1843                         .sta_id = mvmvif->bcast_sta.sta_id,
1844                         .tid = IWL_MAX_TID_COUNT,
1845                         .aggregate = false,
1846                         .frame_limit = IWL_FRAME_LIMIT,
1847                 };
1848                 unsigned int wdg_timeout =
1849                         iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1850
1851                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue,
1852                                    0, &cfg, wdg_timeout);
1853         }
1854
1855         return 0;
1856 }
1857
1858 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1859                                           struct ieee80211_vif *vif)
1860 {
1861         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1862
1863         lockdep_assert_held(&mvm->mutex);
1864
1865         if (vif->type == NL80211_IFTYPE_AP)
1866                 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue,
1867                                     IWL_MAX_TID_COUNT, 0);
1868
1869         if (mvmvif->bcast_sta.tfd_queue_msk &
1870             BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)) {
1871                 iwl_mvm_disable_txq(mvm,
1872                                     IWL_MVM_DQA_AP_PROBE_RESP_QUEUE,
1873                                     vif->hw_queue[0], IWL_MAX_TID_COUNT,
1874                                     0);
1875                 mvmvif->bcast_sta.tfd_queue_msk &=
1876                         ~BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1877         }
1878
1879         if (mvmvif->bcast_sta.tfd_queue_msk &
1880             BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)) {
1881                 iwl_mvm_disable_txq(mvm,
1882                                     IWL_MVM_DQA_P2P_DEVICE_QUEUE,
1883                                     vif->hw_queue[0], IWL_MAX_TID_COUNT,
1884                                     0);
1885                 mvmvif->bcast_sta.tfd_queue_msk &=
1886                         ~BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1887         }
1888 }
1889
1890 /* Send the FW a request to remove the station from it's internal data
1891  * structures, but DO NOT remove the entry from the local data structures. */
1892 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1893 {
1894         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1895         int ret;
1896
1897         lockdep_assert_held(&mvm->mutex);
1898
1899         if (iwl_mvm_is_dqa_supported(mvm))
1900                 iwl_mvm_free_bcast_sta_queues(mvm, vif);
1901
1902         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1903         if (ret)
1904                 IWL_WARN(mvm, "Failed sending remove station\n");
1905         return ret;
1906 }
1907
1908 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1909 {
1910         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1911         u32 qmask = 0;
1912
1913         lockdep_assert_held(&mvm->mutex);
1914
1915         if (!iwl_mvm_is_dqa_supported(mvm)) {
1916                 qmask = iwl_mvm_mac_get_queues_mask(vif);
1917
1918                 /*
1919                  * The firmware defines the TFD queue mask to only be relevant
1920                  * for *unicast* queues, so the multicast (CAB) queue shouldn't
1921                  * be included. This only happens in NL80211_IFTYPE_AP vif type,
1922                  * so the next line will only have an effect there.
1923                  */
1924                 qmask &= ~BIT(vif->cab_queue);
1925         }
1926
1927         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1928                                         ieee80211_vif_type_p2p(vif));
1929 }
1930
1931 /* Allocate a new station entry for the broadcast station to the given vif,
1932  * and send it to the FW.
1933  * Note that each P2P mac should have its own broadcast station.
1934  *
1935  * @mvm: the mvm component
1936  * @vif: the interface to which the broadcast station is added
1937  * @bsta: the broadcast station to add. */
1938 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1939 {
1940         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1941         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1942         int ret;
1943
1944         lockdep_assert_held(&mvm->mutex);
1945
1946         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1947         if (ret)
1948                 return ret;
1949
1950         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1951
1952         if (ret)
1953                 iwl_mvm_dealloc_int_sta(mvm, bsta);
1954
1955         return ret;
1956 }
1957
1958 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1959 {
1960         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1961
1962         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1963 }
1964
1965 /*
1966  * Send the FW a request to remove the station from it's internal data
1967  * structures, and in addition remove it from the local data structure.
1968  */
1969 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1970 {
1971         int ret;
1972
1973         lockdep_assert_held(&mvm->mutex);
1974
1975         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1976
1977         iwl_mvm_dealloc_bcast_sta(mvm, vif);
1978
1979         return ret;
1980 }
1981
1982 #define IWL_MAX_RX_BA_SESSIONS 16
1983
1984 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1985 {
1986         struct iwl_mvm_delba_notif notif = {
1987                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1988                 .metadata.sync = 1,
1989                 .delba.baid = baid,
1990         };
1991         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1992 };
1993
1994 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1995                                  struct iwl_mvm_baid_data *data)
1996 {
1997         int i;
1998
1999         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2000
2001         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2002                 int j;
2003                 struct iwl_mvm_reorder_buffer *reorder_buf =
2004                         &data->reorder_buf[i];
2005
2006                 spin_lock_bh(&reorder_buf->lock);
2007                 if (likely(!reorder_buf->num_stored)) {
2008                         spin_unlock_bh(&reorder_buf->lock);
2009                         continue;
2010                 }
2011
2012                 /*
2013                  * This shouldn't happen in regular DELBA since the internal
2014                  * delBA notification should trigger a release of all frames in
2015                  * the reorder buffer.
2016                  */
2017                 WARN_ON(1);
2018
2019                 for (j = 0; j < reorder_buf->buf_size; j++)
2020                         __skb_queue_purge(&reorder_buf->entries[j]);
2021                 /*
2022                  * Prevent timer re-arm. This prevents a very far fetched case
2023                  * where we timed out on the notification. There may be prior
2024                  * RX frames pending in the RX queue before the notification
2025                  * that might get processed between now and the actual deletion
2026                  * and we would re-arm the timer although we are deleting the
2027                  * reorder buffer.
2028                  */
2029                 reorder_buf->removed = true;
2030                 spin_unlock_bh(&reorder_buf->lock);
2031                 del_timer_sync(&reorder_buf->reorder_timer);
2032         }
2033 }
2034
2035 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2036                                         u32 sta_id,
2037                                         struct iwl_mvm_baid_data *data,
2038                                         u16 ssn, u8 buf_size)
2039 {
2040         int i;
2041
2042         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2043                 struct iwl_mvm_reorder_buffer *reorder_buf =
2044                         &data->reorder_buf[i];
2045                 int j;
2046
2047                 reorder_buf->num_stored = 0;
2048                 reorder_buf->head_sn = ssn;
2049                 reorder_buf->buf_size = buf_size;
2050                 /* rx reorder timer */
2051                 reorder_buf->reorder_timer.function =
2052                         iwl_mvm_reorder_timer_expired;
2053                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2054                 init_timer(&reorder_buf->reorder_timer);
2055                 spin_lock_init(&reorder_buf->lock);
2056                 reorder_buf->mvm = mvm;
2057                 reorder_buf->queue = i;
2058                 reorder_buf->sta_id = sta_id;
2059                 for (j = 0; j < reorder_buf->buf_size; j++)
2060                         __skb_queue_head_init(&reorder_buf->entries[j]);
2061         }
2062 }
2063
2064 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2065                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2066 {
2067         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2068         struct iwl_mvm_add_sta_cmd cmd = {};
2069         struct iwl_mvm_baid_data *baid_data = NULL;
2070         int ret;
2071         u32 status;
2072
2073         lockdep_assert_held(&mvm->mutex);
2074
2075         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2076                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2077                 return -ENOSPC;
2078         }
2079
2080         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2081                 /*
2082                  * Allocate here so if allocation fails we can bail out early
2083                  * before starting the BA session in the firmware
2084                  */
2085                 baid_data = kzalloc(sizeof(*baid_data) +
2086                                     mvm->trans->num_rx_queues *
2087                                     sizeof(baid_data->reorder_buf[0]),
2088                                     GFP_KERNEL);
2089                 if (!baid_data)
2090                         return -ENOMEM;
2091         }
2092
2093         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2094         cmd.sta_id = mvm_sta->sta_id;
2095         cmd.add_modify = STA_MODE_MODIFY;
2096         if (start) {
2097                 cmd.add_immediate_ba_tid = (u8) tid;
2098                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2099                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2100         } else {
2101                 cmd.remove_immediate_ba_tid = (u8) tid;
2102         }
2103         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2104                                   STA_MODIFY_REMOVE_BA_TID;
2105
2106         status = ADD_STA_SUCCESS;
2107         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2108                                           iwl_mvm_add_sta_cmd_size(mvm),
2109                                           &cmd, &status);
2110         if (ret)
2111                 goto out_free;
2112
2113         switch (status & IWL_ADD_STA_STATUS_MASK) {
2114         case ADD_STA_SUCCESS:
2115                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2116                              start ? "start" : "stopp");
2117                 break;
2118         case ADD_STA_IMMEDIATE_BA_FAILURE:
2119                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2120                 ret = -ENOSPC;
2121                 break;
2122         default:
2123                 ret = -EIO;
2124                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2125                         start ? "start" : "stopp", status);
2126                 break;
2127         }
2128
2129         if (ret)
2130                 goto out_free;
2131
2132         if (start) {
2133                 u8 baid;
2134
2135                 mvm->rx_ba_sessions++;
2136
2137                 if (!iwl_mvm_has_new_rx_api(mvm))
2138                         return 0;
2139
2140                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2141                         ret = -EINVAL;
2142                         goto out_free;
2143                 }
2144                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2145                             IWL_ADD_STA_BAID_SHIFT);
2146                 baid_data->baid = baid;
2147                 baid_data->timeout = timeout;
2148                 baid_data->last_rx = jiffies;
2149                 setup_timer(&baid_data->session_timer,
2150                             iwl_mvm_rx_agg_session_expired,
2151                             (unsigned long)&mvm->baid_map[baid]);
2152                 baid_data->mvm = mvm;
2153                 baid_data->tid = tid;
2154                 baid_data->sta_id = mvm_sta->sta_id;
2155
2156                 mvm_sta->tid_to_baid[tid] = baid;
2157                 if (timeout)
2158                         mod_timer(&baid_data->session_timer,
2159                                   TU_TO_EXP_TIME(timeout * 2));
2160
2161                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2162                                             baid_data, ssn, buf_size);
2163                 /*
2164                  * protect the BA data with RCU to cover a case where our
2165                  * internal RX sync mechanism will timeout (not that it's
2166                  * supposed to happen) and we will free the session data while
2167                  * RX is being processed in parallel
2168                  */
2169                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2170                              mvm_sta->sta_id, tid, baid);
2171                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2172                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2173         } else  {
2174                 u8 baid = mvm_sta->tid_to_baid[tid];
2175
2176                 if (mvm->rx_ba_sessions > 0)
2177                         /* check that restart flow didn't zero the counter */
2178                         mvm->rx_ba_sessions--;
2179                 if (!iwl_mvm_has_new_rx_api(mvm))
2180                         return 0;
2181
2182                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2183                         return -EINVAL;
2184
2185                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2186                 if (WARN_ON(!baid_data))
2187                         return -EINVAL;
2188
2189                 /* synchronize all rx queues so we can safely delete */
2190                 iwl_mvm_free_reorder(mvm, baid_data);
2191                 del_timer_sync(&baid_data->session_timer);
2192                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2193                 kfree_rcu(baid_data, rcu_head);
2194                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2195         }
2196         return 0;
2197
2198 out_free:
2199         kfree(baid_data);
2200         return ret;
2201 }
2202
2203 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2204                        int tid, u8 queue, bool start)
2205 {
2206         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2207         struct iwl_mvm_add_sta_cmd cmd = {};
2208         int ret;
2209         u32 status;
2210
2211         lockdep_assert_held(&mvm->mutex);
2212
2213         if (start) {
2214                 mvm_sta->tfd_queue_msk |= BIT(queue);
2215                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2216         } else {
2217                 /* In DQA-mode the queue isn't removed on agg termination */
2218                 if (!iwl_mvm_is_dqa_supported(mvm))
2219                         mvm_sta->tfd_queue_msk &= ~BIT(queue);
2220                 mvm_sta->tid_disable_agg |= BIT(tid);
2221         }
2222
2223         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2224         cmd.sta_id = mvm_sta->sta_id;
2225         cmd.add_modify = STA_MODE_MODIFY;
2226         cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
2227         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2228         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2229
2230         status = ADD_STA_SUCCESS;
2231         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2232                                           iwl_mvm_add_sta_cmd_size(mvm),
2233                                           &cmd, &status);
2234         if (ret)
2235                 return ret;
2236
2237         switch (status & IWL_ADD_STA_STATUS_MASK) {
2238         case ADD_STA_SUCCESS:
2239                 break;
2240         default:
2241                 ret = -EIO;
2242                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2243                         start ? "start" : "stopp", status);
2244                 break;
2245         }
2246
2247         return ret;
2248 }
2249
2250 const u8 tid_to_mac80211_ac[] = {
2251         IEEE80211_AC_BE,
2252         IEEE80211_AC_BK,
2253         IEEE80211_AC_BK,
2254         IEEE80211_AC_BE,
2255         IEEE80211_AC_VI,
2256         IEEE80211_AC_VI,
2257         IEEE80211_AC_VO,
2258         IEEE80211_AC_VO,
2259         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2260 };
2261
2262 static const u8 tid_to_ucode_ac[] = {
2263         AC_BE,
2264         AC_BK,
2265         AC_BK,
2266         AC_BE,
2267         AC_VI,
2268         AC_VI,
2269         AC_VO,
2270         AC_VO,
2271 };
2272
2273 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2274                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2275 {
2276         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2277         struct iwl_mvm_tid_data *tid_data;
2278         int txq_id;
2279         int ret;
2280
2281         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2282                 return -EINVAL;
2283
2284         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2285                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2286                         mvmsta->tid_data[tid].state);
2287                 return -ENXIO;
2288         }
2289
2290         lockdep_assert_held(&mvm->mutex);
2291
2292         spin_lock_bh(&mvmsta->lock);
2293
2294         /* possible race condition - we entered D0i3 while starting agg */
2295         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2296                 spin_unlock_bh(&mvmsta->lock);
2297                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2298                 return -EIO;
2299         }
2300
2301         spin_lock(&mvm->queue_info_lock);
2302
2303         /*
2304          * Note the possible cases:
2305          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2306          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2307          *      one and mark it as reserved
2308          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2309          *      non-DQA mode, since the TXQ hasn't yet been allocated
2310          */
2311         txq_id = mvmsta->tid_data[tid].txq_id;
2312         if (iwl_mvm_is_dqa_supported(mvm) &&
2313             unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) {
2314                 ret = -ENXIO;
2315                 IWL_DEBUG_TX_QUEUES(mvm,
2316                                     "Can't start tid %d agg on shared queue!\n",
2317                                     tid);
2318                 goto release_locks;
2319         } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2320             mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2321                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2322                                                  mvm->first_agg_queue,
2323                                                  mvm->last_agg_queue);
2324                 if (txq_id < 0) {
2325                         ret = txq_id;
2326                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2327                         goto release_locks;
2328                 }
2329                 /*
2330                  * TXQ shouldn't be in inactive mode for non-DQA, so getting
2331                  * an inactive queue from iwl_mvm_find_free_queue() is
2332                  * certainly a bug
2333                  */
2334                 WARN_ON(mvm->queue_info[txq_id].status ==
2335                         IWL_MVM_QUEUE_INACTIVE);
2336
2337                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2338                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2339         }
2340
2341         spin_unlock(&mvm->queue_info_lock);
2342
2343         IWL_DEBUG_TX_QUEUES(mvm,
2344                             "AGG for tid %d will be on queue #%d\n",
2345                             tid, txq_id);
2346
2347         tid_data = &mvmsta->tid_data[tid];
2348         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2349         tid_data->txq_id = txq_id;
2350         *ssn = tid_data->ssn;
2351
2352         IWL_DEBUG_TX_QUEUES(mvm,
2353                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2354                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2355                             tid_data->next_reclaimed);
2356
2357         if (tid_data->ssn == tid_data->next_reclaimed) {
2358                 tid_data->state = IWL_AGG_STARTING;
2359                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2360         } else {
2361                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2362         }
2363
2364         ret = 0;
2365         goto out;
2366
2367 release_locks:
2368         spin_unlock(&mvm->queue_info_lock);
2369 out:
2370         spin_unlock_bh(&mvmsta->lock);
2371
2372         return ret;
2373 }
2374
2375 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2376                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2377                             bool amsdu)
2378 {
2379         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2380         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2381         unsigned int wdg_timeout =
2382                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2383         int queue, ret;
2384         bool alloc_queue = true;
2385         enum iwl_mvm_queue_status queue_status;
2386         u16 ssn;
2387
2388         struct iwl_trans_txq_scd_cfg cfg = {
2389                 .sta_id = mvmsta->sta_id,
2390                 .tid = tid,
2391                 .frame_limit = buf_size,
2392                 .aggregate = true,
2393         };
2394
2395         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2396                      != IWL_MAX_TID_COUNT);
2397
2398         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2399
2400         spin_lock_bh(&mvmsta->lock);
2401         ssn = tid_data->ssn;
2402         queue = tid_data->txq_id;
2403         tid_data->state = IWL_AGG_ON;
2404         mvmsta->agg_tids |= BIT(tid);
2405         tid_data->ssn = 0xffff;
2406         tid_data->amsdu_in_ampdu_allowed = amsdu;
2407         spin_unlock_bh(&mvmsta->lock);
2408
2409         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2410
2411         spin_lock_bh(&mvm->queue_info_lock);
2412         queue_status = mvm->queue_info[queue].status;
2413         spin_unlock_bh(&mvm->queue_info_lock);
2414
2415         /* In DQA mode, the existing queue might need to be reconfigured */
2416         if (iwl_mvm_is_dqa_supported(mvm)) {
2417                 /* Maybe there is no need to even alloc a queue... */
2418                 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2419                         alloc_queue = false;
2420
2421                 /*
2422                  * Only reconfig the SCD for the queue if the window size has
2423                  * changed from current (become smaller)
2424                  */
2425                 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2426                         /*
2427                          * If reconfiguring an existing queue, it first must be
2428                          * drained
2429                          */
2430                         ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
2431                                                             BIT(queue));
2432                         if (ret) {
2433                                 IWL_ERR(mvm,
2434                                         "Error draining queue before reconfig\n");
2435                                 return ret;
2436                         }
2437
2438                         ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2439                                                    mvmsta->sta_id, tid,
2440                                                    buf_size, ssn);
2441                         if (ret) {
2442                                 IWL_ERR(mvm,
2443                                         "Error reconfiguring TXQ #%d\n", queue);
2444                                 return ret;
2445                         }
2446                 }
2447         }
2448
2449         if (alloc_queue)
2450                 iwl_mvm_enable_txq(mvm, queue,
2451                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2452                                    &cfg, wdg_timeout);
2453
2454         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2455         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2456                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2457                 if (ret)
2458                         return -EIO;
2459         }
2460
2461         /* No need to mark as reserved */
2462         spin_lock_bh(&mvm->queue_info_lock);
2463         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2464         spin_unlock_bh(&mvm->queue_info_lock);
2465
2466         /*
2467          * Even though in theory the peer could have different
2468          * aggregation reorder buffer sizes for different sessions,
2469          * our ucode doesn't allow for that and has a global limit
2470          * for each station. Therefore, use the minimum of all the
2471          * aggregation sessions and our default value.
2472          */
2473         mvmsta->max_agg_bufsize =
2474                 min(mvmsta->max_agg_bufsize, buf_size);
2475         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2476
2477         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2478                      sta->addr, tid);
2479
2480         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2481 }
2482
2483 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2484                             struct ieee80211_sta *sta, u16 tid)
2485 {
2486         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2487         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2488         u16 txq_id;
2489         int err;
2490
2491         /*
2492          * If mac80211 is cleaning its state, then say that we finished since
2493          * our state has been cleared anyway.
2494          */
2495         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2496                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2497                 return 0;
2498         }
2499
2500         spin_lock_bh(&mvmsta->lock);
2501
2502         txq_id = tid_data->txq_id;
2503
2504         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2505                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2506
2507         mvmsta->agg_tids &= ~BIT(tid);
2508
2509         spin_lock_bh(&mvm->queue_info_lock);
2510         /*
2511          * The TXQ is marked as reserved only if no traffic came through yet
2512          * This means no traffic has been sent on this TID (agg'd or not), so
2513          * we no longer have use for the queue. Since it hasn't even been
2514          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2515          * free.
2516          */
2517         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2518                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2519
2520         spin_unlock_bh(&mvm->queue_info_lock);
2521
2522         switch (tid_data->state) {
2523         case IWL_AGG_ON:
2524                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2525
2526                 IWL_DEBUG_TX_QUEUES(mvm,
2527                                     "ssn = %d, next_recl = %d\n",
2528                                     tid_data->ssn, tid_data->next_reclaimed);
2529
2530                 /* There are still packets for this RA / TID in the HW */
2531                 if (tid_data->ssn != tid_data->next_reclaimed) {
2532                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2533                         err = 0;
2534                         break;
2535                 }
2536
2537                 tid_data->ssn = 0xffff;
2538                 tid_data->state = IWL_AGG_OFF;
2539                 spin_unlock_bh(&mvmsta->lock);
2540
2541                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2542
2543                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2544
2545                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2546                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2547
2548                         iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2549                 }
2550                 return 0;
2551         case IWL_AGG_STARTING:
2552         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2553                 /*
2554                  * The agg session has been stopped before it was set up. This
2555                  * can happen when the AddBA timer times out for example.
2556                  */
2557
2558                 /* No barriers since we are under mutex */
2559                 lockdep_assert_held(&mvm->mutex);
2560
2561                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2562                 tid_data->state = IWL_AGG_OFF;
2563                 err = 0;
2564                 break;
2565         default:
2566                 IWL_ERR(mvm,
2567                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2568                         mvmsta->sta_id, tid, tid_data->state);
2569                 IWL_ERR(mvm,
2570                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2571                 err = -EINVAL;
2572         }
2573
2574         spin_unlock_bh(&mvmsta->lock);
2575
2576         return err;
2577 }
2578
2579 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2580                             struct ieee80211_sta *sta, u16 tid)
2581 {
2582         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2583         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2584         u16 txq_id;
2585         enum iwl_mvm_agg_state old_state;
2586
2587         /*
2588          * First set the agg state to OFF to avoid calling
2589          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2590          */
2591         spin_lock_bh(&mvmsta->lock);
2592         txq_id = tid_data->txq_id;
2593         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2594                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2595         old_state = tid_data->state;
2596         tid_data->state = IWL_AGG_OFF;
2597         mvmsta->agg_tids &= ~BIT(tid);
2598         spin_unlock_bh(&mvmsta->lock);
2599
2600         spin_lock_bh(&mvm->queue_info_lock);
2601         /*
2602          * The TXQ is marked as reserved only if no traffic came through yet
2603          * This means no traffic has been sent on this TID (agg'd or not), so
2604          * we no longer have use for the queue. Since it hasn't even been
2605          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2606          * free.
2607          */
2608         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2609                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2610         spin_unlock_bh(&mvm->queue_info_lock);
2611
2612         if (old_state >= IWL_AGG_ON) {
2613                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2614                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2615                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2616                 iwl_trans_wait_tx_queue_empty(mvm->trans,
2617                                               mvmsta->tfd_queue_msk);
2618                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2619
2620                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2621
2622                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2623                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2624
2625                         iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2626                                             tid, 0);
2627                 }
2628         }
2629
2630         return 0;
2631 }
2632
2633 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2634 {
2635         int i, max = -1, max_offs = -1;
2636
2637         lockdep_assert_held(&mvm->mutex);
2638
2639         /* Pick the unused key offset with the highest 'deleted'
2640          * counter. Every time a key is deleted, all the counters
2641          * are incremented and the one that was just deleted is
2642          * reset to zero. Thus, the highest counter is the one
2643          * that was deleted longest ago. Pick that one.
2644          */
2645         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2646                 if (test_bit(i, mvm->fw_key_table))
2647                         continue;
2648                 if (mvm->fw_key_deleted[i] > max) {
2649                         max = mvm->fw_key_deleted[i];
2650                         max_offs = i;
2651                 }
2652         }
2653
2654         if (max_offs < 0)
2655                 return STA_KEY_IDX_INVALID;
2656
2657         return max_offs;
2658 }
2659
2660 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2661                                                struct ieee80211_vif *vif,
2662                                                struct ieee80211_sta *sta)
2663 {
2664         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2665
2666         if (sta)
2667                 return iwl_mvm_sta_from_mac80211(sta);
2668
2669         /*
2670          * The device expects GTKs for station interfaces to be
2671          * installed as GTKs for the AP station. If we have no
2672          * station ID, then use AP's station ID.
2673          */
2674         if (vif->type == NL80211_IFTYPE_STATION &&
2675             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2676                 u8 sta_id = mvmvif->ap_sta_id;
2677
2678                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2679                                             lockdep_is_held(&mvm->mutex));
2680
2681                 /*
2682                  * It is possible that the 'sta' parameter is NULL,
2683                  * for example when a GTK is removed - the sta_id will then
2684                  * be the AP ID, and no station was passed by mac80211.
2685                  */
2686                 if (IS_ERR_OR_NULL(sta))
2687                         return NULL;
2688
2689                 return iwl_mvm_sta_from_mac80211(sta);
2690         }
2691
2692         return NULL;
2693 }
2694
2695 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2696                                 struct iwl_mvm_sta *mvm_sta,
2697                                 struct ieee80211_key_conf *keyconf, bool mcast,
2698                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2699                                 u8 key_offset)
2700 {
2701         struct iwl_mvm_add_sta_key_cmd cmd = {};
2702         __le16 key_flags;
2703         int ret;
2704         u32 status;
2705         u16 keyidx;
2706         int i;
2707         u8 sta_id = mvm_sta->sta_id;
2708
2709         keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2710                  STA_KEY_FLG_KEYID_MSK;
2711         key_flags = cpu_to_le16(keyidx);
2712         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2713
2714         switch (keyconf->cipher) {
2715         case WLAN_CIPHER_SUITE_TKIP:
2716                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2717                 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
2718                 for (i = 0; i < 5; i++)
2719                         cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
2720                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2721                 break;
2722         case WLAN_CIPHER_SUITE_CCMP:
2723                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2724                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2725                 break;
2726         case WLAN_CIPHER_SUITE_WEP104:
2727                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2728                 /* fall through */
2729         case WLAN_CIPHER_SUITE_WEP40:
2730                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2731                 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
2732                 break;
2733         case WLAN_CIPHER_SUITE_GCMP_256:
2734                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2735                 /* fall through */
2736         case WLAN_CIPHER_SUITE_GCMP:
2737                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2738                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2739                 break;
2740         default:
2741                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2742                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2743         }
2744
2745         if (mcast)
2746                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2747
2748         cmd.key_offset = key_offset;
2749         cmd.key_flags = key_flags;
2750         cmd.sta_id = sta_id;
2751
2752         status = ADD_STA_SUCCESS;
2753         if (cmd_flags & CMD_ASYNC)
2754                 ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
2755                                             sizeof(cmd), &cmd);
2756         else
2757                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2758                                                   &cmd, &status);
2759
2760         switch (status) {
2761         case ADD_STA_SUCCESS:
2762                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2763                 break;
2764         default:
2765                 ret = -EIO;
2766                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
2767                 break;
2768         }
2769
2770         return ret;
2771 }
2772
2773 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
2774                                  struct ieee80211_key_conf *keyconf,
2775                                  u8 sta_id, bool remove_key)
2776 {
2777         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
2778
2779         /* verify the key details match the required command's expectations */
2780         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
2781                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
2782                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
2783                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
2784                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
2785                 return -EINVAL;
2786
2787         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
2788                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
2789                 return -EINVAL;
2790
2791         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
2792         igtk_cmd.sta_id = cpu_to_le32(sta_id);
2793
2794         if (remove_key) {
2795                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
2796         } else {
2797                 struct ieee80211_key_seq seq;
2798                 const u8 *pn;
2799
2800                 switch (keyconf->cipher) {
2801                 case WLAN_CIPHER_SUITE_AES_CMAC:
2802                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
2803                         break;
2804                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2805                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2806                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
2807                         break;
2808                 default:
2809                         return -EINVAL;
2810                 }
2811
2812                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
2813                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2814                         igtk_cmd.ctrl_flags |=
2815                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
2816                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2817                 pn = seq.aes_cmac.pn;
2818                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
2819                                                        ((u64) pn[4] << 8) |
2820                                                        ((u64) pn[3] << 16) |
2821                                                        ((u64) pn[2] << 24) |
2822                                                        ((u64) pn[1] << 32) |
2823                                                        ((u64) pn[0] << 40));
2824         }
2825
2826         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
2827                        remove_key ? "removing" : "installing",
2828                        igtk_cmd.sta_id);
2829
2830         if (!iwl_mvm_has_new_rx_api(mvm)) {
2831                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
2832                         .ctrl_flags = igtk_cmd.ctrl_flags,
2833                         .key_id = igtk_cmd.key_id,
2834                         .sta_id = igtk_cmd.sta_id,
2835                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
2836                 };
2837
2838                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
2839                        ARRAY_SIZE(igtk_cmd_v1.igtk));
2840                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2841                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
2842         }
2843         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2844                                     sizeof(igtk_cmd), &igtk_cmd);
2845 }
2846
2847
2848 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
2849                                        struct ieee80211_vif *vif,
2850                                        struct ieee80211_sta *sta)
2851 {
2852         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2853
2854         if (sta)
2855                 return sta->addr;
2856
2857         if (vif->type == NL80211_IFTYPE_STATION &&
2858             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2859                 u8 sta_id = mvmvif->ap_sta_id;
2860                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2861                                                 lockdep_is_held(&mvm->mutex));
2862                 return sta->addr;
2863         }
2864
2865
2866         return NULL;
2867 }
2868
2869 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2870                                  struct ieee80211_vif *vif,
2871                                  struct ieee80211_sta *sta,
2872                                  struct ieee80211_key_conf *keyconf,
2873                                  u8 key_offset,
2874                                  bool mcast)
2875 {
2876         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2877         int ret;
2878         const u8 *addr;
2879         struct ieee80211_key_seq seq;
2880         u16 p1k[5];
2881
2882         switch (keyconf->cipher) {
2883         case WLAN_CIPHER_SUITE_TKIP:
2884                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2885                 /* get phase 1 key from mac80211 */
2886                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2887                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2888                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2889                                            seq.tkip.iv32, p1k, 0, key_offset);
2890                 break;
2891         case WLAN_CIPHER_SUITE_CCMP:
2892         case WLAN_CIPHER_SUITE_WEP40:
2893         case WLAN_CIPHER_SUITE_WEP104:
2894         case WLAN_CIPHER_SUITE_GCMP:
2895         case WLAN_CIPHER_SUITE_GCMP_256:
2896                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2897                                            0, NULL, 0, key_offset);
2898                 break;
2899         default:
2900                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2901                                            0, NULL, 0, key_offset);
2902         }
2903
2904         return ret;
2905 }
2906
2907 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2908                                     struct ieee80211_key_conf *keyconf,
2909                                     bool mcast)
2910 {
2911         struct iwl_mvm_add_sta_key_cmd cmd = {};
2912         __le16 key_flags;
2913         int ret;
2914         u32 status;
2915
2916         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2917                                  STA_KEY_FLG_KEYID_MSK);
2918         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2919         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2920
2921         if (mcast)
2922                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2923
2924         cmd.key_flags = key_flags;
2925         cmd.key_offset = keyconf->hw_key_idx;
2926         cmd.sta_id = sta_id;
2927
2928         status = ADD_STA_SUCCESS;
2929         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2930                                           &cmd, &status);
2931
2932         switch (status) {
2933         case ADD_STA_SUCCESS:
2934                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2935                 break;
2936         default:
2937                 ret = -EIO;
2938                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2939                 break;
2940         }
2941
2942         return ret;
2943 }
2944
2945 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2946                         struct ieee80211_vif *vif,
2947                         struct ieee80211_sta *sta,
2948                         struct ieee80211_key_conf *keyconf,
2949                         u8 key_offset)
2950 {
2951         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2952         struct iwl_mvm_sta *mvm_sta;
2953         u8 sta_id;
2954         int ret;
2955         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
2956
2957         lockdep_assert_held(&mvm->mutex);
2958
2959         /* Get the station id from the mvm local station table */
2960         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2961         if (!mvm_sta) {
2962                 IWL_ERR(mvm, "Failed to find station\n");
2963                 return -EINVAL;
2964         }
2965         sta_id = mvm_sta->sta_id;
2966
2967         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2968             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2969             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
2970                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2971                 goto end;
2972         }
2973
2974         /*
2975          * It is possible that the 'sta' parameter is NULL, and thus
2976          * there is a need to retrieve  the sta from the local station table.
2977          */
2978         if (!sta) {
2979                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2980                                                 lockdep_is_held(&mvm->mutex));
2981                 if (IS_ERR_OR_NULL(sta)) {
2982                         IWL_ERR(mvm, "Invalid station id\n");
2983                         return -EINVAL;
2984                 }
2985         }
2986
2987         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2988                 return -EINVAL;
2989
2990         /* If the key_offset is not pre-assigned, we need to find a
2991          * new offset to use.  In normal cases, the offset is not
2992          * pre-assigned, but during HW_RESTART we want to reuse the
2993          * same indices, so we pass them when this function is called.
2994          *
2995          * In D3 entry, we need to hardcoded the indices (because the
2996          * firmware hardcodes the PTK offset to 0).  In this case, we
2997          * need to make sure we don't overwrite the hw_key_idx in the
2998          * keyconf structure, because otherwise we cannot configure
2999          * the original ones back when resuming.
3000          */
3001         if (key_offset == STA_KEY_IDX_INVALID) {
3002                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3003                 if (key_offset == STA_KEY_IDX_INVALID)
3004                         return -ENOSPC;
3005                 keyconf->hw_key_idx = key_offset;
3006         }
3007
3008         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3009         if (ret)
3010                 goto end;
3011
3012         /*
3013          * For WEP, the same key is used for multicast and unicast. Upload it
3014          * again, using the same key offset, and now pointing the other one
3015          * to the same key slot (offset).
3016          * If this fails, remove the original as well.
3017          */
3018         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3019             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
3020                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3021                                             key_offset, !mcast);
3022                 if (ret) {
3023                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3024                         goto end;
3025                 }
3026         }
3027
3028         __set_bit(key_offset, mvm->fw_key_table);
3029
3030 end:
3031         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3032                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3033                       sta ? sta->addr : zero_addr, ret);
3034         return ret;
3035 }
3036
3037 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3038                            struct ieee80211_vif *vif,
3039                            struct ieee80211_sta *sta,
3040                            struct ieee80211_key_conf *keyconf)
3041 {
3042         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3043         struct iwl_mvm_sta *mvm_sta;
3044         u8 sta_id = IWL_MVM_STATION_COUNT;
3045         int ret, i;
3046
3047         lockdep_assert_held(&mvm->mutex);
3048
3049         /* Get the station from the mvm local station table */
3050         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3051         if (!mvm_sta) {
3052                 IWL_ERR(mvm, "Failed to find station\n");
3053                 return -EINVAL;
3054         }
3055         sta_id = mvm_sta->sta_id;
3056
3057         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3058                       keyconf->keyidx, sta_id);
3059
3060         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3061             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3062             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3063                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3064
3065         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3066                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3067                         keyconf->hw_key_idx);
3068                 return -ENOENT;
3069         }
3070
3071         /* track which key was deleted last */
3072         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3073                 if (mvm->fw_key_deleted[i] < U8_MAX)
3074                         mvm->fw_key_deleted[i]++;
3075         }
3076         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3077
3078         if (!mvm_sta) {
3079                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3080                 return 0;
3081         }
3082
3083         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3084         if (ret)
3085                 return ret;
3086
3087         /* delete WEP key twice to get rid of (now useless) offset */
3088         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3089             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3090                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3091
3092         return ret;
3093 }
3094
3095 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3096                              struct ieee80211_vif *vif,
3097                              struct ieee80211_key_conf *keyconf,
3098                              struct ieee80211_sta *sta, u32 iv32,
3099                              u16 *phase1key)
3100 {
3101         struct iwl_mvm_sta *mvm_sta;
3102         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3103
3104         rcu_read_lock();
3105
3106         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3107         if (WARN_ON_ONCE(!mvm_sta))
3108                 goto unlock;
3109         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3110                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3111
3112  unlock:
3113         rcu_read_unlock();
3114 }
3115
3116 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3117                                 struct ieee80211_sta *sta)
3118 {
3119         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3120         struct iwl_mvm_add_sta_cmd cmd = {
3121                 .add_modify = STA_MODE_MODIFY,
3122                 .sta_id = mvmsta->sta_id,
3123                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3124                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3125         };
3126         int ret;
3127
3128         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3129                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3130         if (ret)
3131                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3132 }
3133
3134 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3135                                        struct ieee80211_sta *sta,
3136                                        enum ieee80211_frame_release_type reason,
3137                                        u16 cnt, u16 tids, bool more_data,
3138                                        bool agg)
3139 {
3140         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3141         struct iwl_mvm_add_sta_cmd cmd = {
3142                 .add_modify = STA_MODE_MODIFY,
3143                 .sta_id = mvmsta->sta_id,
3144                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3145                 .sleep_tx_count = cpu_to_le16(cnt),
3146                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3147         };
3148         int tid, ret;
3149         unsigned long _tids = tids;
3150
3151         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3152          * Note that this field is reserved and unused by firmware not
3153          * supporting GO uAPSD, so it's safe to always do this.
3154          */
3155         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3156                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3157
3158         /* If we're releasing frames from aggregation queues then check if the
3159          * all queues combined that we're releasing frames from have
3160          *  - more frames than the service period, in which case more_data
3161          *    needs to be set
3162          *  - fewer than 'cnt' frames, in which case we need to adjust the
3163          *    firmware command (but do that unconditionally)
3164          */
3165         if (agg) {
3166                 int remaining = cnt;
3167                 int sleep_tx_count;
3168
3169                 spin_lock_bh(&mvmsta->lock);
3170                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3171                         struct iwl_mvm_tid_data *tid_data;
3172                         u16 n_queued;
3173
3174                         tid_data = &mvmsta->tid_data[tid];
3175                         if (WARN(tid_data->state != IWL_AGG_ON &&
3176                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3177                                  "TID %d state is %d\n",
3178                                  tid, tid_data->state)) {
3179                                 spin_unlock_bh(&mvmsta->lock);
3180                                 ieee80211_sta_eosp(sta);
3181                                 return;
3182                         }
3183
3184                         n_queued = iwl_mvm_tid_queued(tid_data);
3185                         if (n_queued > remaining) {
3186                                 more_data = true;
3187                                 remaining = 0;
3188                                 break;
3189                         }
3190                         remaining -= n_queued;
3191                 }
3192                 sleep_tx_count = cnt - remaining;
3193                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3194                         mvmsta->sleep_tx_count = sleep_tx_count;
3195                 spin_unlock_bh(&mvmsta->lock);
3196
3197                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3198                 if (WARN_ON(cnt - remaining == 0)) {
3199                         ieee80211_sta_eosp(sta);
3200                         return;
3201                 }
3202         }
3203
3204         /* Note: this is ignored by firmware not supporting GO uAPSD */
3205         if (more_data)
3206                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
3207
3208         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3209                 mvmsta->next_status_eosp = true;
3210                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
3211         } else {
3212                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
3213         }
3214
3215         /* block the Tx queues until the FW updated the sleep Tx count */
3216         iwl_trans_block_txq_ptrs(mvm->trans, true);
3217
3218         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3219                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3220                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3221         if (ret)
3222                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3223 }
3224
3225 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3226                            struct iwl_rx_cmd_buffer *rxb)
3227 {
3228         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3229         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3230         struct ieee80211_sta *sta;
3231         u32 sta_id = le32_to_cpu(notif->sta_id);
3232
3233         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3234                 return;
3235
3236         rcu_read_lock();
3237         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3238         if (!IS_ERR_OR_NULL(sta))
3239                 ieee80211_sta_eosp(sta);
3240         rcu_read_unlock();
3241 }
3242
3243 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3244                                    struct iwl_mvm_sta *mvmsta, bool disable)
3245 {
3246         struct iwl_mvm_add_sta_cmd cmd = {
3247                 .add_modify = STA_MODE_MODIFY,
3248                 .sta_id = mvmsta->sta_id,
3249                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3250                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3251                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3252         };
3253         int ret;
3254
3255         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3256                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3257         if (ret)
3258                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3259 }
3260
3261 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3262                                       struct ieee80211_sta *sta,
3263                                       bool disable)
3264 {
3265         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3266
3267         spin_lock_bh(&mvm_sta->lock);
3268
3269         if (mvm_sta->disable_tx == disable) {
3270                 spin_unlock_bh(&mvm_sta->lock);
3271                 return;
3272         }
3273
3274         mvm_sta->disable_tx = disable;
3275
3276         /*
3277          * Tell mac80211 to start/stop queuing tx for this station,
3278          * but don't stop queuing if there are still pending frames
3279          * for this station.
3280          */
3281         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3282                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3283
3284         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3285
3286         spin_unlock_bh(&mvm_sta->lock);
3287 }
3288
3289 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3290                                        struct iwl_mvm_vif *mvmvif,
3291                                        bool disable)
3292 {
3293         struct ieee80211_sta *sta;
3294         struct iwl_mvm_sta *mvm_sta;
3295         int i;
3296
3297         lockdep_assert_held(&mvm->mutex);
3298
3299         /* Block/unblock all the stations of the given mvmvif */
3300         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3301                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3302                                                 lockdep_is_held(&mvm->mutex));
3303                 if (IS_ERR_OR_NULL(sta))
3304                         continue;
3305
3306                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3307                 if (mvm_sta->mac_id_n_color !=
3308                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3309                         continue;
3310
3311                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3312         }
3313 }
3314
3315 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3316 {
3317         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3318         struct iwl_mvm_sta *mvmsta;
3319
3320         rcu_read_lock();
3321
3322         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3323
3324         if (!WARN_ON(!mvmsta))
3325                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3326
3327         rcu_read_unlock();
3328 }