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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
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   6  * GPL LICENSE SUMMARY
   7  *
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   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
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  16  * This program is distributed in the hope that it will be useful, but
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  34  *
  35  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  52  *    from this software without specific prior written permission.
  53  *
  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
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  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         if (iwl_mvm_has_new_rx_api(mvm) ||
  81             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
  82                 return sizeof(struct iwl_mvm_add_sta_cmd);
  83         else
  84                 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
  85 }
  86
  87 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
  88                                     enum nl80211_iftype iftype)
  89 {
  90         int sta_id;
  91         u32 reserved_ids = 0;
  92
  93         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
  94         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
  95
  96         lockdep_assert_held(&mvm->mutex);
  97
  98         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
  99         if (iftype != NL80211_IFTYPE_STATION)
 100                 reserved_ids = BIT(0);
 101
 102         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
 103         for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
 104                 if (BIT(sta_id) & reserved_ids)
 105                         continue;
 106
 107                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 108                                                lockdep_is_held(&mvm->mutex)))
 109                         return sta_id;
 110         }
 111         return IWL_MVM_INVALID_STA;
 112 }
 113
 114 /* send station add/update command to firmware */
 115 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 116                            bool update, unsigned int flags)
 117 {
 118         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 119         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
 120                 .sta_id = mvm_sta->sta_id,
 121                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
 122                 .add_modify = update ? 1 : 0,
 123                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
 124                                                  STA_FLG_MIMO_EN_MSK),
 125                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 126         };
 127         int ret;
 128         u32 status;
 129         u32 agg_size = 0, mpdu_dens = 0;
 130
 131         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
 132                 add_sta_cmd.station_type = mvm_sta->sta_type;
 133
 134         if (!update || (flags & STA_MODIFY_QUEUES)) {
 135                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 136
 137                 if (!iwl_mvm_has_new_tx_api(mvm)) {
 138                         add_sta_cmd.tfd_queue_msk =
 139                                 cpu_to_le32(mvm_sta->tfd_queue_msk);
 140
 141                         if (flags & STA_MODIFY_QUEUES)
 142                                 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 143                 } else {
 144                         WARN_ON(flags & STA_MODIFY_QUEUES);
 145                 }
 146         }
 147
 148         switch (sta->bandwidth) {
 149         case IEEE80211_STA_RX_BW_160:
 150                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 151                 /* fall through */
 152         case IEEE80211_STA_RX_BW_80:
 153                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 154                 /* fall through */
 155         case IEEE80211_STA_RX_BW_40:
 156                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 157                 /* fall through */
 158         case IEEE80211_STA_RX_BW_20:
 159                 if (sta->ht_cap.ht_supported)
 160                         add_sta_cmd.station_flags |=
 161                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 162                 break;
 163         }
 164
 165         switch (sta->rx_nss) {
 166         case 1:
 167                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 168                 break;
 169         case 2:
 170                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 171                 break;
 172         case 3 ... 8:
 173                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 174                 break;
 175         }
 176
 177         switch (sta->smps_mode) {
 178         case IEEE80211_SMPS_AUTOMATIC:
 179         case IEEE80211_SMPS_NUM_MODES:
 180                 WARN_ON(1);
 181                 break;
 182         case IEEE80211_SMPS_STATIC:
 183                 /* override NSS */
 184                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 185                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 186                 break;
 187         case IEEE80211_SMPS_DYNAMIC:
 188                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 189                 break;
 190         case IEEE80211_SMPS_OFF:
 191                 /* nothing */
 192                 break;
 193         }
 194
 195         if (sta->ht_cap.ht_supported) {
 196                 add_sta_cmd.station_flags_msk |=
 197                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 198                                     STA_FLG_AGG_MPDU_DENS_MSK);
 199
 200                 mpdu_dens = sta->ht_cap.ampdu_density;
 201         }
 202
 203         if (sta->vht_cap.vht_supported) {
 204                 agg_size = sta->vht_cap.cap &
 205                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 206                 agg_size >>=
 207                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 208         } else if (sta->ht_cap.ht_supported) {
 209                 agg_size = sta->ht_cap.ampdu_factor;
 210         }
 211
 212         add_sta_cmd.station_flags |=
 213                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 214         add_sta_cmd.station_flags |=
 215                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 216         if (mvm_sta->associated)
 217                 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 218
 219         if (sta->wme) {
 220                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 221
 222                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 223                         add_sta_cmd.uapsd_acs |= BIT(AC_BK);
 224                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 225                         add_sta_cmd.uapsd_acs |= BIT(AC_BE);
 226                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 227                         add_sta_cmd.uapsd_acs |= BIT(AC_VI);
 228                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 229                         add_sta_cmd.uapsd_acs |= BIT(AC_VO);
 230                 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
 231                 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
 232         }
 233
 234         status = ADD_STA_SUCCESS;
 235         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 236                                           iwl_mvm_add_sta_cmd_size(mvm),
 237                                           &add_sta_cmd, &status);
 238         if (ret)
 239                 return ret;
 240
 241         switch (status & IWL_ADD_STA_STATUS_MASK) {
 242         case ADD_STA_SUCCESS:
 243                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 244                 break;
 245         default:
 246                 ret = -EIO;
 247                 IWL_ERR(mvm, "ADD_STA failed\n");
 248                 break;
 249         }
 250
 251         return ret;
 252 }
 253
 254 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
 255 {
 256         struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
 257         struct iwl_mvm_baid_data *ba_data;
 258         struct ieee80211_sta *sta;
 259         struct iwl_mvm_sta *mvm_sta;
 260         unsigned long timeout;
 261
 262         rcu_read_lock();
 263
 264         ba_data = rcu_dereference(*rcu_ptr);
 265
 266         if (WARN_ON(!ba_data))
 267                 goto unlock;
 268
 269         if (!ba_data->timeout)
 270                 goto unlock;
 271
 272         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 273         if (time_is_after_jiffies(timeout)) {
 274                 mod_timer(&ba_data->session_timer, timeout);
 275                 goto unlock;
 276         }
 277
 278         /* Timer expired */
 279         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 280
 281         /*
 282          * sta should be valid unless the following happens:
 283          * The firmware asserts which triggers a reconfig flow, but
 284          * the reconfig fails before we set the pointer to sta into
 285          * the fw_id_to_mac_id pointer table. Mac80211 can't stop
 286          * A-MDPU and hence the timer continues to run. Then, the
 287          * timer expires and sta is NULL.
 288          */
 289         if (!sta)
 290                 goto unlock;
 291
 292         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 293         ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
 294                                           sta->addr, ba_data->tid);
 295 unlock:
 296         rcu_read_unlock();
 297 }
 298
 299 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
 300                                  struct ieee80211_sta *sta)
 301 {
 302         unsigned long used_hw_queues;
 303         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 304         unsigned int wdg_timeout =
 305                 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
 306         u32 ac;
 307
 308         lockdep_assert_held(&mvm->mutex);
 309
 310         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
 311
 312         /* Find available queues, and allocate them to the ACs */
 313         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 314                 u8 queue = find_first_zero_bit(&used_hw_queues,
 315                                                mvm->first_agg_queue);
 316
 317                 if (queue >= mvm->first_agg_queue) {
 318                         IWL_ERR(mvm, "Failed to allocate STA queue\n");
 319                         return -EBUSY;
 320                 }
 321
 322                 __set_bit(queue, &used_hw_queues);
 323                 mvmsta->hw_queue[ac] = queue;
 324         }
 325
 326         /* Found a place for all queues - enable them */
 327         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 328                 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
 329                                       mvmsta->hw_queue[ac],
 330                                       iwl_mvm_ac_to_tx_fifo[ac], 0,
 331                                       wdg_timeout);
 332                 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
 333         }
 334
 335         return 0;
 336 }
 337
 338 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
 339                                     struct ieee80211_sta *sta)
 340 {
 341         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 342         unsigned long sta_msk;
 343         int i;
 344
 345         lockdep_assert_held(&mvm->mutex);
 346
 347         /* disable the TDLS STA-specific queues */
 348         sta_msk = mvmsta->tfd_queue_msk;
 349         for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
 350                 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
 351 }
 352
 353 /* Disable aggregations for a bitmap of TIDs for a given station */
 354 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 355                                         unsigned long disable_agg_tids,
 356                                         bool remove_queue)
 357 {
 358         struct iwl_mvm_add_sta_cmd cmd = {};
 359         struct ieee80211_sta *sta;
 360         struct iwl_mvm_sta *mvmsta;
 361         u32 status;
 362         u8 sta_id;
 363         int ret;
 364
 365         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 366                 return -EINVAL;
 367
 368         spin_lock_bh(&mvm->queue_info_lock);
 369         sta_id = mvm->queue_info[queue].ra_sta_id;
 370         spin_unlock_bh(&mvm->queue_info_lock);
 371
 372         rcu_read_lock();
 373
 374         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 375
 376         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 377                 rcu_read_unlock();
 378                 return -EINVAL;
 379         }
 380
 381         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 382
 383         mvmsta->tid_disable_agg |= disable_agg_tids;
 384
 385         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 386         cmd.sta_id = mvmsta->sta_id;
 387         cmd.add_modify = STA_MODE_MODIFY;
 388         cmd.modify_mask = STA_MODIFY_QUEUES;
 389         if (disable_agg_tids)
 390                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 391         if (remove_queue)
 392                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 393         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 394         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 395
 396         rcu_read_unlock();
 397
 398         /* Notify FW of queue removal from the STA queues */
 399         status = ADD_STA_SUCCESS;
 400         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 401                                           iwl_mvm_add_sta_cmd_size(mvm),
 402                                           &cmd, &status);
 403
 404         return ret;
 405 }
 406
 407 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 408 {
 409         struct ieee80211_sta *sta;
 410         struct iwl_mvm_sta *mvmsta;
 411         unsigned long tid_bitmap;
 412         unsigned long agg_tids = 0;
 413         u8 sta_id;
 414         int tid;
 415
 416         lockdep_assert_held(&mvm->mutex);
 417
 418         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 419                 return -EINVAL;
 420
 421         spin_lock_bh(&mvm->queue_info_lock);
 422         sta_id = mvm->queue_info[queue].ra_sta_id;
 423         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 424         spin_unlock_bh(&mvm->queue_info_lock);
 425
 426         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 427                                         lockdep_is_held(&mvm->mutex));
 428
 429         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 430                 return -EINVAL;
 431
 432         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 433
 434         spin_lock_bh(&mvmsta->lock);
 435         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 436                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 437                         agg_tids |= BIT(tid);
 438         }
 439         spin_unlock_bh(&mvmsta->lock);
 440
 441         return agg_tids;
 442 }
 443
 444 /*
 445  * Remove a queue from a station's resources.
 446  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 447  * doesn't disable the queue
 448  */
 449 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 450 {
 451         struct ieee80211_sta *sta;
 452         struct iwl_mvm_sta *mvmsta;
 453         unsigned long tid_bitmap;
 454         unsigned long disable_agg_tids = 0;
 455         u8 sta_id;
 456         int tid;
 457
 458         lockdep_assert_held(&mvm->mutex);
 459
 460         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 461                 return -EINVAL;
 462
 463         spin_lock_bh(&mvm->queue_info_lock);
 464         sta_id = mvm->queue_info[queue].ra_sta_id;
 465         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 466         spin_unlock_bh(&mvm->queue_info_lock);
 467
 468         rcu_read_lock();
 469
 470         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 471
 472         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 473                 rcu_read_unlock();
 474                 return 0;
 475         }
 476
 477         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 478
 479         spin_lock_bh(&mvmsta->lock);
 480         /* Unmap MAC queues and TIDs from this queue */
 481         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 482                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 483                         disable_agg_tids |= BIT(tid);
 484                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
 485         }
 486
 487         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 488         spin_unlock_bh(&mvmsta->lock);
 489
 490         rcu_read_unlock();
 491
 492         return disable_agg_tids;
 493 }
 494
 495 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
 496                                        bool same_sta)
 497 {
 498         struct iwl_mvm_sta *mvmsta;
 499         u8 txq_curr_ac, sta_id, tid;
 500         unsigned long disable_agg_tids = 0;
 501         int ret;
 502
 503         lockdep_assert_held(&mvm->mutex);
 504
 505         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 506                 return -EINVAL;
 507
 508         spin_lock_bh(&mvm->queue_info_lock);
 509         txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
 510         sta_id = mvm->queue_info[queue].ra_sta_id;
 511         tid = mvm->queue_info[queue].txq_tid;
 512         spin_unlock_bh(&mvm->queue_info_lock);
 513
 514         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 515         if (WARN_ON(!mvmsta))
 516                 return -EINVAL;
 517
 518         disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 519         /* Disable the queue */
 520         if (disable_agg_tids)
 521                 iwl_mvm_invalidate_sta_queue(mvm, queue,
 522                                              disable_agg_tids, false);
 523
 524         ret = iwl_mvm_disable_txq(mvm, queue,
 525                                   mvmsta->vif->hw_queue[txq_curr_ac],
 526                                   tid, 0);
 527         if (ret) {
 528                 /* Re-mark the inactive queue as inactive */
 529                 spin_lock_bh(&mvm->queue_info_lock);
 530                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
 531                 spin_unlock_bh(&mvm->queue_info_lock);
 532                 IWL_ERR(mvm,
 533                         "Failed to free inactive queue %d (ret=%d)\n",
 534                         queue, ret);
 535
 536                 return ret;
 537         }
 538
 539         /* If TXQ is allocated to another STA, update removal in FW */
 540         if (!same_sta)
 541                 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 542
 543         return 0;
 544 }
 545
 546 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 547                                     unsigned long tfd_queue_mask, u8 ac)
 548 {
 549         int queue = 0;
 550         u8 ac_to_queue[IEEE80211_NUM_ACS];
 551         int i;
 552
 553         lockdep_assert_held(&mvm->queue_info_lock);
 554         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 555                 return -EINVAL;
 556
 557         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 558
 559         /* See what ACs the existing queues for this STA have */
 560         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 561                 /* Only DATA queues can be shared */
 562                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 563                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 564                         continue;
 565
 566                 /* Don't try and take queues being reconfigured */
 567                 if (mvm->queue_info[queue].status ==
 568                     IWL_MVM_QUEUE_RECONFIGURING)
 569                         continue;
 570
 571                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 572         }
 573
 574         /*
 575          * The queue to share is chosen only from DATA queues as follows (in
 576          * descending priority):
 577          * 1. An AC_BE queue
 578          * 2. Same AC queue
 579          * 3. Highest AC queue that is lower than new AC
 580          * 4. Any existing AC (there always is at least 1 DATA queue)
 581          */
 582
 583         /* Priority 1: An AC_BE queue */
 584         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 585                 queue = ac_to_queue[IEEE80211_AC_BE];
 586         /* Priority 2: Same AC queue */
 587         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 588                 queue = ac_to_queue[ac];
 589         /* Priority 3a: If new AC is VO and VI exists - use VI */
 590         else if (ac == IEEE80211_AC_VO &&
 591                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 592                 queue = ac_to_queue[IEEE80211_AC_VI];
 593         /* Priority 3b: No BE so only AC less than the new one is BK */
 594         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 595                 queue = ac_to_queue[IEEE80211_AC_BK];
 596         /* Priority 4a: No BE nor BK - use VI if exists */
 597         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 598                 queue = ac_to_queue[IEEE80211_AC_VI];
 599         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 600         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 601                 queue = ac_to_queue[IEEE80211_AC_VO];
 602
 603         /* Make sure queue found (or not) is legal */
 604         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 605             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 606             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 607                 IWL_ERR(mvm, "No DATA queues available to share\n");
 608                 return -ENOSPC;
 609         }
 610
 611         /* Make sure the queue isn't in the middle of being reconfigured */
 612         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
 613                 IWL_ERR(mvm,
 614                         "TXQ %d is in the middle of re-config - try again\n",
 615                         queue);
 616                 return -EBUSY;
 617         }
 618
 619         return queue;
 620 }
 621
 622 /*
 623  * If a given queue has a higher AC than the TID stream that is being compared
 624  * to, the queue needs to be redirected to the lower AC. This function does that
 625  * in such a case, otherwise - if no redirection required - it does nothing,
 626  * unless the %force param is true.
 627  */
 628 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
 629                                int ac, int ssn, unsigned int wdg_timeout,
 630                                bool force)
 631 {
 632         struct iwl_scd_txq_cfg_cmd cmd = {
 633                 .scd_queue = queue,
 634                 .action = SCD_CFG_DISABLE_QUEUE,
 635         };
 636         bool shared_queue;
 637         unsigned long mq;
 638         int ret;
 639
 640         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 641                 return -EINVAL;
 642
 643         /*
 644          * If the AC is lower than current one - FIFO needs to be redirected to
 645          * the lowest one of the streams in the queue. Check if this is needed
 646          * here.
 647          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 648          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 649          * we need to check if the numerical value of X is LARGER than of Y.
 650          */
 651         spin_lock_bh(&mvm->queue_info_lock);
 652         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 653                 spin_unlock_bh(&mvm->queue_info_lock);
 654
 655                 IWL_DEBUG_TX_QUEUES(mvm,
 656                                     "No redirection needed on TXQ #%d\n",
 657                                     queue);
 658                 return 0;
 659         }
 660
 661         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 662         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 663         cmd.tid = mvm->queue_info[queue].txq_tid;
 664         mq = mvm->hw_queue_to_mac80211[queue];
 665         shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
 666         spin_unlock_bh(&mvm->queue_info_lock);
 667
 668         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 669                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 670
 671         /* Stop MAC queues and wait for this queue to empty */
 672         iwl_mvm_stop_mac_queues(mvm, mq);
 673         ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
 674         if (ret) {
 675                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 676                         queue);
 677                 ret = -EIO;
 678                 goto out;
 679         }
 680
 681         /* Before redirecting the queue we need to de-activate it */
 682         iwl_trans_txq_disable(mvm->trans, queue, false);
 683         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 684         if (ret)
 685                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 686                         ret);
 687
 688         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 689         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 690
 691         /* Update the TID "owner" of the queue */
 692         spin_lock_bh(&mvm->queue_info_lock);
 693         mvm->queue_info[queue].txq_tid = tid;
 694         spin_unlock_bh(&mvm->queue_info_lock);
 695
 696         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 697
 698         /* Redirect to lower AC */
 699         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 700                              cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
 701                              ssn);
 702
 703         /* Update AC marking of the queue */
 704         spin_lock_bh(&mvm->queue_info_lock);
 705         mvm->queue_info[queue].mac80211_ac = ac;
 706         spin_unlock_bh(&mvm->queue_info_lock);
 707
 708         /*
 709          * Mark queue as shared in transport if shared
 710          * Note this has to be done after queue enablement because enablement
 711          * can also set this value, and there is no indication there to shared
 712          * queues
 713          */
 714         if (shared_queue)
 715                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 716
 717 out:
 718         /* Continue using the MAC queues */
 719         iwl_mvm_start_mac_queues(mvm, mq);
 720
 721         return ret;
 722 }
 723
 724 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
 725                                         struct ieee80211_sta *sta, u8 ac,
 726                                         int tid)
 727 {
 728         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 729         unsigned int wdg_timeout =
 730                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 731         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 732         int queue = -1;
 733
 734         lockdep_assert_held(&mvm->mutex);
 735
 736         IWL_DEBUG_TX_QUEUES(mvm,
 737                             "Allocating queue for sta %d on tid %d\n",
 738                             mvmsta->sta_id, tid);
 739         queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
 740                                         wdg_timeout);
 741         if (queue < 0)
 742                 return queue;
 743
 744         IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
 745
 746         spin_lock_bh(&mvmsta->lock);
 747         mvmsta->tid_data[tid].txq_id = queue;
 748         mvmsta->tid_data[tid].is_tid_active = true;
 749         spin_unlock_bh(&mvmsta->lock);
 750
 751         return 0;
 752 }
 753
 754 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
 755                                    struct ieee80211_sta *sta, u8 ac, int tid,
 756                                    struct ieee80211_hdr *hdr)
 757 {
 758         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 759         struct iwl_trans_txq_scd_cfg cfg = {
 760                 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
 761                 .sta_id = mvmsta->sta_id,
 762                 .tid = tid,
 763                 .frame_limit = IWL_FRAME_LIMIT,
 764         };
 765         unsigned int wdg_timeout =
 766                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 767         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 768         int queue = -1;
 769         bool using_inactive_queue = false, same_sta = false;
 770         unsigned long disable_agg_tids = 0;
 771         enum iwl_mvm_agg_state queue_state;
 772         bool shared_queue = false, inc_ssn;
 773         int ssn;
 774         unsigned long tfd_queue_mask;
 775         int ret;
 776
 777         lockdep_assert_held(&mvm->mutex);
 778
 779         if (iwl_mvm_has_new_tx_api(mvm))
 780                 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
 781
 782         spin_lock_bh(&mvmsta->lock);
 783         tfd_queue_mask = mvmsta->tfd_queue_msk;
 784         spin_unlock_bh(&mvmsta->lock);
 785
 786         spin_lock_bh(&mvm->queue_info_lock);
 787
 788         /*
 789          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
 790          * exists
 791          */
 792         if (!ieee80211_is_data_qos(hdr->frame_control) ||
 793             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 794                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 795                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
 796                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
 797                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
 798                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
 799                                             queue);
 800
 801                 /* If no such queue is found, we'll use a DATA queue instead */
 802         }
 803
 804         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
 805             (mvm->queue_info[mvmsta->reserved_queue].status ==
 806              IWL_MVM_QUEUE_RESERVED ||
 807              mvm->queue_info[mvmsta->reserved_queue].status ==
 808              IWL_MVM_QUEUE_INACTIVE)) {
 809                 queue = mvmsta->reserved_queue;
 810                 mvm->queue_info[queue].reserved = true;
 811                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
 812         }
 813
 814         if (queue < 0)
 815                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 816                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
 817                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 818
 819         /*
 820          * Check if this queue is already allocated but inactive.
 821          * In such a case, we'll need to first free this queue before enabling
 822          * it again, so we'll mark it as reserved to make sure no new traffic
 823          * arrives on it
 824          */
 825         if (queue > 0 &&
 826             mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
 827                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
 828                 using_inactive_queue = true;
 829                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
 830                 IWL_DEBUG_TX_QUEUES(mvm,
 831                                     "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
 832                                     queue, mvmsta->sta_id, tid);
 833         }
 834
 835         /* No free queue - we'll have to share */
 836         if (queue <= 0) {
 837                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
 838                 if (queue > 0) {
 839                         shared_queue = true;
 840                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
 841                 }
 842         }
 843
 844         /*
 845          * Mark TXQ as ready, even though it hasn't been fully configured yet,
 846          * to make sure no one else takes it.
 847          * This will allow avoiding re-acquiring the lock at the end of the
 848          * configuration. On error we'll mark it back as free.
 849          */
 850         if ((queue > 0) && !shared_queue)
 851                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 852
 853         spin_unlock_bh(&mvm->queue_info_lock);
 854
 855         /* This shouldn't happen - out of queues */
 856         if (WARN_ON(queue <= 0)) {
 857                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
 858                         tid, cfg.sta_id);
 859                 return queue;
 860         }
 861
 862         /*
 863          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
 864          * but for configuring the SCD to send A-MPDUs we need to mark the queue
 865          * as aggregatable.
 866          * Mark all DATA queues as allowing to be aggregated at some point
 867          */
 868         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 869                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
 870
 871         /*
 872          * If this queue was previously inactive (idle) - we need to free it
 873          * first
 874          */
 875         if (using_inactive_queue) {
 876                 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
 877                 if (ret)
 878                         return ret;
 879         }
 880
 881         IWL_DEBUG_TX_QUEUES(mvm,
 882                             "Allocating %squeue #%d to sta %d on tid %d\n",
 883                             shared_queue ? "shared " : "", queue,
 884                             mvmsta->sta_id, tid);
 885
 886         if (shared_queue) {
 887                 /* Disable any open aggs on this queue */
 888                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
 889
 890                 if (disable_agg_tids) {
 891                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
 892                                             queue);
 893                         iwl_mvm_invalidate_sta_queue(mvm, queue,
 894                                                      disable_agg_tids, false);
 895                 }
 896         }
 897
 898         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 899         inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
 900                                      ssn, &cfg, wdg_timeout);
 901         if (inc_ssn) {
 902                 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
 903                 le16_add_cpu(&hdr->seq_ctrl, 0x10);
 904         }
 905
 906         /*
 907          * Mark queue as shared in transport if shared
 908          * Note this has to be done after queue enablement because enablement
 909          * can also set this value, and there is no indication there to shared
 910          * queues
 911          */
 912         if (shared_queue)
 913                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 914
 915         spin_lock_bh(&mvmsta->lock);
 916         /*
 917          * This looks racy, but it is not. We have only one packet for
 918          * this ra/tid in our Tx path since we stop the Qdisc when we
 919          * need to allocate a new TFD queue.
 920          */
 921         if (inc_ssn)
 922                 mvmsta->tid_data[tid].seq_number += 0x10;
 923         mvmsta->tid_data[tid].txq_id = queue;
 924         mvmsta->tid_data[tid].is_tid_active = true;
 925         mvmsta->tfd_queue_msk |= BIT(queue);
 926         queue_state = mvmsta->tid_data[tid].state;
 927
 928         if (mvmsta->reserved_queue == queue)
 929                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
 930         spin_unlock_bh(&mvmsta->lock);
 931
 932         if (!shared_queue) {
 933                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
 934                 if (ret)
 935                         goto out_err;
 936
 937                 /* If we need to re-enable aggregations... */
 938                 if (queue_state == IWL_AGG_ON) {
 939                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
 940                         if (ret)
 941                                 goto out_err;
 942                 }
 943         } else {
 944                 /* Redirect queue, if needed */
 945                 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
 946                                                  wdg_timeout, false);
 947                 if (ret)
 948                         goto out_err;
 949         }
 950
 951         return 0;
 952
 953 out_err:
 954         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
 955
 956         return ret;
 957 }
 958
 959 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
 960 {
 961         struct iwl_scd_txq_cfg_cmd cmd = {
 962                 .scd_queue = queue,
 963                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 964         };
 965         int tid;
 966         unsigned long tid_bitmap;
 967         int ret;
 968
 969         lockdep_assert_held(&mvm->mutex);
 970
 971         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 972                 return;
 973
 974         spin_lock_bh(&mvm->queue_info_lock);
 975         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 976         spin_unlock_bh(&mvm->queue_info_lock);
 977
 978         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 979                 return;
 980
 981         /* Find any TID for queue */
 982         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 983         cmd.tid = tid;
 984         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 985
 986         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 987         if (ret) {
 988                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 989                         queue, ret);
 990                 return;
 991         }
 992
 993         spin_lock_bh(&mvm->queue_info_lock);
 994         mvm->queue_info[queue].txq_tid = tid;
 995         spin_unlock_bh(&mvm->queue_info_lock);
 996         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 997                             queue, tid);
 998 }
 999
1000 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
1001 {
1002         struct ieee80211_sta *sta;
1003         struct iwl_mvm_sta *mvmsta;
1004         u8 sta_id;
1005         int tid = -1;
1006         unsigned long tid_bitmap;
1007         unsigned int wdg_timeout;
1008         int ssn;
1009         int ret = true;
1010
1011         /* queue sharing is disabled on new TX path */
1012         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1013                 return;
1014
1015         lockdep_assert_held(&mvm->mutex);
1016
1017         spin_lock_bh(&mvm->queue_info_lock);
1018         sta_id = mvm->queue_info[queue].ra_sta_id;
1019         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1020         spin_unlock_bh(&mvm->queue_info_lock);
1021
1022         /* Find TID for queue, and make sure it is the only one on the queue */
1023         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1024         if (tid_bitmap != BIT(tid)) {
1025                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1026                         queue, tid_bitmap);
1027                 return;
1028         }
1029
1030         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1031                             tid);
1032
1033         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1034                                         lockdep_is_held(&mvm->mutex));
1035
1036         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1037                 return;
1038
1039         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1040         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1041
1042         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1043
1044         ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
1045                                          tid_to_mac80211_ac[tid], ssn,
1046                                          wdg_timeout, true);
1047         if (ret) {
1048                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1049                 return;
1050         }
1051
1052         /* If aggs should be turned back on - do it */
1053         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1054                 struct iwl_mvm_add_sta_cmd cmd = {0};
1055
1056                 mvmsta->tid_disable_agg &= ~BIT(tid);
1057
1058                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1059                 cmd.sta_id = mvmsta->sta_id;
1060                 cmd.add_modify = STA_MODE_MODIFY;
1061                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1062                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1063                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1064
1065                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1066                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1067                 if (!ret) {
1068                         IWL_DEBUG_TX_QUEUES(mvm,
1069                                             "TXQ #%d is now aggregated again\n",
1070                                             queue);
1071
1072                         /* Mark queue intenally as aggregating again */
1073                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1074                 }
1075         }
1076
1077         spin_lock_bh(&mvm->queue_info_lock);
1078         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1079         spin_unlock_bh(&mvm->queue_info_lock);
1080 }
1081
1082 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1083 {
1084         if (tid == IWL_MAX_TID_COUNT)
1085                 return IEEE80211_AC_VO; /* MGMT */
1086
1087         return tid_to_mac80211_ac[tid];
1088 }
1089
1090 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1091                                        struct ieee80211_sta *sta, int tid)
1092 {
1093         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1094         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1095         struct sk_buff *skb;
1096         struct ieee80211_hdr *hdr;
1097         struct sk_buff_head deferred_tx;
1098         u8 mac_queue;
1099         bool no_queue = false; /* Marks if there is a problem with the queue */
1100         u8 ac;
1101
1102         lockdep_assert_held(&mvm->mutex);
1103
1104         skb = skb_peek(&tid_data->deferred_tx_frames);
1105         if (!skb)
1106                 return;
1107         hdr = (void *)skb->data;
1108
1109         ac = iwl_mvm_tid_to_ac_queue(tid);
1110         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1111
1112         if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1113             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1114                 IWL_ERR(mvm,
1115                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1116                         mvmsta->sta_id, tid);
1117
1118                 /*
1119                  * Mark queue as problematic so later the deferred traffic is
1120                  * freed, as we can do nothing with it
1121                  */
1122                 no_queue = true;
1123         }
1124
1125         __skb_queue_head_init(&deferred_tx);
1126
1127         /* Disable bottom-halves when entering TX path */
1128         local_bh_disable();
1129         spin_lock(&mvmsta->lock);
1130         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1131         mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1132         spin_unlock(&mvmsta->lock);
1133
1134         while ((skb = __skb_dequeue(&deferred_tx)))
1135                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1136                         ieee80211_free_txskb(mvm->hw, skb);
1137         local_bh_enable();
1138
1139         /* Wake queue */
1140         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1141 }
1142
1143 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1144 {
1145         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1146                                            add_stream_wk);
1147         struct ieee80211_sta *sta;
1148         struct iwl_mvm_sta *mvmsta;
1149         unsigned long deferred_tid_traffic;
1150         int queue, sta_id, tid;
1151
1152         /* Check inactivity of queues */
1153         iwl_mvm_inactivity_check(mvm);
1154
1155         mutex_lock(&mvm->mutex);
1156
1157         /* No queue reconfiguration in TVQM mode */
1158         if (iwl_mvm_has_new_tx_api(mvm))
1159                 goto alloc_queues;
1160
1161         /* Reconfigure queues requiring reconfiguation */
1162         for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1163                 bool reconfig;
1164                 bool change_owner;
1165
1166                 spin_lock_bh(&mvm->queue_info_lock);
1167                 reconfig = (mvm->queue_info[queue].status ==
1168                             IWL_MVM_QUEUE_RECONFIGURING);
1169
1170                 /*
1171                  * We need to take into account a situation in which a TXQ was
1172                  * allocated to TID x, and then turned shared by adding TIDs y
1173                  * and z. If TID x becomes inactive and is removed from the TXQ,
1174                  * ownership must be given to one of the remaining TIDs.
1175                  * This is mainly because if TID x continues - a new queue can't
1176                  * be allocated for it as long as it is an owner of another TXQ.
1177                  */
1178                 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1179                                  BIT(mvm->queue_info[queue].txq_tid)) &&
1180                                (mvm->queue_info[queue].status ==
1181                                 IWL_MVM_QUEUE_SHARED);
1182                 spin_unlock_bh(&mvm->queue_info_lock);
1183
1184                 if (reconfig)
1185                         iwl_mvm_unshare_queue(mvm, queue);
1186                 else if (change_owner)
1187                         iwl_mvm_change_queue_owner(mvm, queue);
1188         }
1189
1190 alloc_queues:
1191         /* Go over all stations with deferred traffic */
1192         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1193                          IWL_MVM_STATION_COUNT) {
1194                 clear_bit(sta_id, mvm->sta_deferred_frames);
1195                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1196                                                 lockdep_is_held(&mvm->mutex));
1197                 if (IS_ERR_OR_NULL(sta))
1198                         continue;
1199
1200                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1201                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1202
1203                 for_each_set_bit(tid, &deferred_tid_traffic,
1204                                  IWL_MAX_TID_COUNT + 1)
1205                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1206         }
1207
1208         mutex_unlock(&mvm->mutex);
1209 }
1210
1211 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1212                                       struct ieee80211_sta *sta,
1213                                       enum nl80211_iftype vif_type)
1214 {
1215         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1216         int queue;
1217         bool using_inactive_queue = false, same_sta = false;
1218
1219         /* queue reserving is disabled on new TX path */
1220         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1221                 return 0;
1222
1223         /*
1224          * Check for inactive queues, so we don't reach a situation where we
1225          * can't add a STA due to a shortage in queues that doesn't really exist
1226          */
1227         iwl_mvm_inactivity_check(mvm);
1228
1229         spin_lock_bh(&mvm->queue_info_lock);
1230
1231         /* Make sure we have free resources for this STA */
1232         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1233             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1234             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1235              IWL_MVM_QUEUE_FREE))
1236                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1237         else
1238                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1239                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1240                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1241         if (queue < 0) {
1242                 spin_unlock_bh(&mvm->queue_info_lock);
1243                 IWL_ERR(mvm, "No available queues for new station\n");
1244                 return -ENOSPC;
1245         } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1246                 /*
1247                  * If this queue is already allocated but inactive we'll need to
1248                  * first free this queue before enabling it again, we'll mark
1249                  * it as reserved to make sure no new traffic arrives on it
1250                  */
1251                 using_inactive_queue = true;
1252                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1253         }
1254         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1255
1256         spin_unlock_bh(&mvm->queue_info_lock);
1257
1258         mvmsta->reserved_queue = queue;
1259
1260         if (using_inactive_queue)
1261                 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1262
1263         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1264                             queue, mvmsta->sta_id);
1265
1266         return 0;
1267 }
1268
1269 /*
1270  * In DQA mode, after a HW restart the queues should be allocated as before, in
1271  * order to avoid race conditions when there are shared queues. This function
1272  * does the re-mapping and queue allocation.
1273  *
1274  * Note that re-enabling aggregations isn't done in this function.
1275  */
1276 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1277                                                  struct iwl_mvm_sta *mvm_sta)
1278 {
1279         unsigned int wdg_timeout =
1280                         iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1281         int i;
1282         struct iwl_trans_txq_scd_cfg cfg = {
1283                 .sta_id = mvm_sta->sta_id,
1284                 .frame_limit = IWL_FRAME_LIMIT,
1285         };
1286
1287         /* Make sure reserved queue is still marked as such (if allocated) */
1288         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1289                 mvm->queue_info[mvm_sta->reserved_queue].status =
1290                         IWL_MVM_QUEUE_RESERVED;
1291
1292         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1293                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1294                 int txq_id = tid_data->txq_id;
1295                 int ac;
1296                 u8 mac_queue;
1297
1298                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1299                         continue;
1300
1301                 skb_queue_head_init(&tid_data->deferred_tx_frames);
1302
1303                 ac = tid_to_mac80211_ac[i];
1304                 mac_queue = mvm_sta->vif->hw_queue[ac];
1305
1306                 if (iwl_mvm_has_new_tx_api(mvm)) {
1307                         IWL_DEBUG_TX_QUEUES(mvm,
1308                                             "Re-mapping sta %d tid %d\n",
1309                                             mvm_sta->sta_id, i);
1310                         txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1311                                                          mvm_sta->sta_id,
1312                                                          i, wdg_timeout);
1313                         tid_data->txq_id = txq_id;
1314                 } else {
1315                         u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1316
1317                         cfg.tid = i;
1318                         cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
1319                         cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1320                                          txq_id ==
1321                                          IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1322
1323                         IWL_DEBUG_TX_QUEUES(mvm,
1324                                             "Re-mapping sta %d tid %d to queue %d\n",
1325                                             mvm_sta->sta_id, i, txq_id);
1326
1327                         iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1328                                            wdg_timeout);
1329                         mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1330                 }
1331         }
1332
1333         atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
1334 }
1335
1336 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1337                     struct ieee80211_vif *vif,
1338                     struct ieee80211_sta *sta)
1339 {
1340         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1341         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1342         struct iwl_mvm_rxq_dup_data *dup_data;
1343         int i, ret, sta_id;
1344
1345         lockdep_assert_held(&mvm->mutex);
1346
1347         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1348                 sta_id = iwl_mvm_find_free_sta_id(mvm,
1349                                                   ieee80211_vif_type_p2p(vif));
1350         else
1351                 sta_id = mvm_sta->sta_id;
1352
1353         if (sta_id == IWL_MVM_INVALID_STA)
1354                 return -ENOSPC;
1355
1356         spin_lock_init(&mvm_sta->lock);
1357
1358         /* In DQA mode, if this is a HW restart, re-alloc existing queues */
1359         if (iwl_mvm_is_dqa_supported(mvm) &&
1360             test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1361                 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1362                 goto update_fw;
1363         }
1364
1365         mvm_sta->sta_id = sta_id;
1366         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1367                                                       mvmvif->color);
1368         mvm_sta->vif = vif;
1369         if (!mvm->trans->cfg->gen2)
1370                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1371         else
1372                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1373         mvm_sta->tx_protection = 0;
1374         mvm_sta->tt_tx_protection = false;
1375         mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1376
1377         /* HW restart, don't assume the memory has been zeroed */
1378         atomic_set(&mvm->pending_frames[sta_id], 0);
1379         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1380         mvm_sta->tfd_queue_msk = 0;
1381
1382         /*
1383          * Allocate new queues for a TDLS station, unless we're in DQA mode,
1384          * and then they'll be allocated dynamically
1385          */
1386         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1387                 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1388                 if (ret)
1389                         return ret;
1390         } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1391                 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1392                         if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1393                                 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1394         }
1395
1396         /* for HW restart - reset everything but the sequence number */
1397         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1398                 u16 seq = mvm_sta->tid_data[i].seq_number;
1399                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1400                 mvm_sta->tid_data[i].seq_number = seq;
1401
1402                 if (!iwl_mvm_is_dqa_supported(mvm))
1403                         continue;
1404
1405                 /*
1406                  * Mark all queues for this STA as unallocated and defer TX
1407                  * frames until the queue is allocated
1408                  */
1409                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1410                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1411         }
1412         mvm_sta->deferred_traffic_tid_map = 0;
1413         mvm_sta->agg_tids = 0;
1414
1415         if (iwl_mvm_has_new_rx_api(mvm) &&
1416             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1417                 int q;
1418
1419                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1420                                    sizeof(*dup_data), GFP_KERNEL);
1421                 if (!dup_data)
1422                         return -ENOMEM;
1423                 /*
1424                  * Initialize all the last_seq values to 0xffff which can never
1425                  * compare equal to the frame's seq_ctrl in the check in
1426                  * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1427                  * number and fragmented packets don't reach that function.
1428                  *
1429                  * This thus allows receiving a packet with seqno 0 and the
1430                  * retry bit set as the very first packet on a new TID.
1431                  */
1432                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1433                         memset(dup_data[q].last_seq, 0xff,
1434                                sizeof(dup_data[q].last_seq));
1435                 mvm_sta->dup_data = dup_data;
1436         }
1437
1438         if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1439                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1440                                                  ieee80211_vif_type_p2p(vif));
1441                 if (ret)
1442                         goto err;
1443         }
1444
1445 update_fw:
1446         ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1447         if (ret)
1448                 goto err;
1449
1450         if (vif->type == NL80211_IFTYPE_STATION) {
1451                 if (!sta->tdls) {
1452                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1453                         mvmvif->ap_sta_id = sta_id;
1454                 } else {
1455                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1456                 }
1457         }
1458
1459         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1460
1461         return 0;
1462
1463 err:
1464         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1465                 iwl_mvm_tdls_sta_deinit(mvm, sta);
1466         return ret;
1467 }
1468
1469 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1470                       bool drain)
1471 {
1472         struct iwl_mvm_add_sta_cmd cmd = {};
1473         int ret;
1474         u32 status;
1475
1476         lockdep_assert_held(&mvm->mutex);
1477
1478         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1479         cmd.sta_id = mvmsta->sta_id;
1480         cmd.add_modify = STA_MODE_MODIFY;
1481         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1482         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1483
1484         status = ADD_STA_SUCCESS;
1485         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1486                                           iwl_mvm_add_sta_cmd_size(mvm),
1487                                           &cmd, &status);
1488         if (ret)
1489                 return ret;
1490
1491         switch (status & IWL_ADD_STA_STATUS_MASK) {
1492         case ADD_STA_SUCCESS:
1493                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1494                                mvmsta->sta_id);
1495                 break;
1496         default:
1497                 ret = -EIO;
1498                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1499                         mvmsta->sta_id);
1500                 break;
1501         }
1502
1503         return ret;
1504 }
1505
1506 /*
1507  * Remove a station from the FW table. Before sending the command to remove
1508  * the station validate that the station is indeed known to the driver (sanity
1509  * only).
1510  */
1511 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1512 {
1513         struct ieee80211_sta *sta;
1514         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1515                 .sta_id = sta_id,
1516         };
1517         int ret;
1518
1519         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1520                                         lockdep_is_held(&mvm->mutex));
1521
1522         /* Note: internal stations are marked as error values */
1523         if (!sta) {
1524                 IWL_ERR(mvm, "Invalid station id\n");
1525                 return -EINVAL;
1526         }
1527
1528         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1529                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1530         if (ret) {
1531                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1532                 return ret;
1533         }
1534
1535         return 0;
1536 }
1537
1538 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1539 {
1540         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1541         u8 sta_id;
1542
1543         /*
1544          * The mutex is needed because of the SYNC cmd, but not only: if the
1545          * work would run concurrently with iwl_mvm_rm_sta, it would run before
1546          * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1547          * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1548          * that later.
1549          */
1550         mutex_lock(&mvm->mutex);
1551
1552         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1553                 int ret;
1554                 struct ieee80211_sta *sta =
1555                         rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1556                                                   lockdep_is_held(&mvm->mutex));
1557
1558                 /*
1559                  * This station is in use or RCU-removed; the latter happens in
1560                  * managed mode, where mac80211 removes the station before we
1561                  * can remove it from firmware (we can only do that after the
1562                  * MAC is marked unassociated), and possibly while the deauth
1563                  * frame to disconnect from the AP is still queued. Then, the
1564                  * station pointer is -ENOENT when the last skb is reclaimed.
1565                  */
1566                 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1567                         continue;
1568
1569                 if (PTR_ERR(sta) == -EINVAL) {
1570                         IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1571                                 sta_id);
1572                         continue;
1573                 }
1574
1575                 if (!sta) {
1576                         IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1577                                 sta_id);
1578                         continue;
1579                 }
1580
1581                 WARN_ON(PTR_ERR(sta) != -EBUSY);
1582                 /* This station was removed and we waited until it got drained,
1583                  * we can now proceed and remove it.
1584                  */
1585                 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1586                 if (ret) {
1587                         IWL_ERR(mvm,
1588                                 "Couldn't remove sta %d after it was drained\n",
1589                                 sta_id);
1590                         continue;
1591                 }
1592                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1593                 clear_bit(sta_id, mvm->sta_drained);
1594
1595                 if (mvm->tfd_drained[sta_id]) {
1596                         unsigned long i, msk = mvm->tfd_drained[sta_id];
1597
1598                         for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1599                                 iwl_mvm_disable_txq(mvm, i, i,
1600                                                     IWL_MAX_TID_COUNT, 0);
1601
1602                         mvm->tfd_drained[sta_id] = 0;
1603                         IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1604                                        sta_id, msk);
1605                 }
1606         }
1607
1608         mutex_unlock(&mvm->mutex);
1609 }
1610
1611 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1612                                        struct ieee80211_vif *vif,
1613                                        struct iwl_mvm_sta *mvm_sta)
1614 {
1615         int ac;
1616         int i;
1617
1618         lockdep_assert_held(&mvm->mutex);
1619
1620         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1621                 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1622                         continue;
1623
1624                 ac = iwl_mvm_tid_to_ac_queue(i);
1625                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1626                                     vif->hw_queue[ac], i, 0);
1627                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1628         }
1629 }
1630
1631 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1632                                   struct iwl_mvm_sta *mvm_sta)
1633 {
1634         int i, ret;
1635
1636         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1637                 u16 txq_id;
1638
1639                 spin_lock_bh(&mvm_sta->lock);
1640                 txq_id = mvm_sta->tid_data[i].txq_id;
1641                 spin_unlock_bh(&mvm_sta->lock);
1642
1643                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1644                         continue;
1645
1646                 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1647                 if (ret)
1648                         break;
1649         }
1650
1651         return ret;
1652 }
1653
1654 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1655                    struct ieee80211_vif *vif,
1656                    struct ieee80211_sta *sta)
1657 {
1658         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1659         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1660         u8 sta_id = mvm_sta->sta_id;
1661         int ret;
1662
1663         lockdep_assert_held(&mvm->mutex);
1664
1665         if (iwl_mvm_has_new_rx_api(mvm))
1666                 kfree(mvm_sta->dup_data);
1667
1668         if ((vif->type == NL80211_IFTYPE_STATION &&
1669              mvmvif->ap_sta_id == sta_id) ||
1670             iwl_mvm_is_dqa_supported(mvm)){
1671                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1672                 if (ret)
1673                         return ret;
1674                 /* flush its queues here since we are freeing mvm_sta */
1675                 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1676                 if (ret)
1677                         return ret;
1678                 if (iwl_mvm_has_new_tx_api(mvm)) {
1679                         ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1680                 } else {
1681                         u32 q_mask = mvm_sta->tfd_queue_msk;
1682
1683                         ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1684                                                              q_mask);
1685                 }
1686                 if (ret)
1687                         return ret;
1688                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1689
1690                 /* If DQA is supported - the queues can be disabled now */
1691                 if (iwl_mvm_is_dqa_supported(mvm)) {
1692                         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1693                         /*
1694                          * If pending_frames is set at this point - it must be
1695                          * driver internal logic error, since queues are empty
1696                          * and removed successuly.
1697                          * warn on it but set it to 0 anyway to avoid station
1698                          * not being removed later in the function
1699                          */
1700                         WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0));
1701                 }
1702
1703                 /* If there is a TXQ still marked as reserved - free it */
1704                 if (iwl_mvm_is_dqa_supported(mvm) &&
1705                     mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1706                         u8 reserved_txq = mvm_sta->reserved_queue;
1707                         enum iwl_mvm_queue_status *status;
1708
1709                         /*
1710                          * If no traffic has gone through the reserved TXQ - it
1711                          * is still marked as IWL_MVM_QUEUE_RESERVED, and
1712                          * should be manually marked as free again
1713                          */
1714                         spin_lock_bh(&mvm->queue_info_lock);
1715                         status = &mvm->queue_info[reserved_txq].status;
1716                         if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1717                                  (*status != IWL_MVM_QUEUE_FREE),
1718                                  "sta_id %d reserved txq %d status %d",
1719                                  sta_id, reserved_txq, *status)) {
1720                                 spin_unlock_bh(&mvm->queue_info_lock);
1721                                 return -EINVAL;
1722                         }
1723
1724                         *status = IWL_MVM_QUEUE_FREE;
1725                         spin_unlock_bh(&mvm->queue_info_lock);
1726                 }
1727
1728                 if (vif->type == NL80211_IFTYPE_STATION &&
1729                     mvmvif->ap_sta_id == sta_id) {
1730                         /* if associated - we can't remove the AP STA now */
1731                         if (vif->bss_conf.assoc)
1732                                 return ret;
1733
1734                         /* unassoc - go ahead - remove the AP STA now */
1735                         mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1736
1737                         /* clear d0i3_ap_sta_id if no longer relevant */
1738                         if (mvm->d0i3_ap_sta_id == sta_id)
1739                                 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1740                 }
1741         }
1742
1743         /*
1744          * This shouldn't happen - the TDLS channel switch should be canceled
1745          * before the STA is removed.
1746          */
1747         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1748                 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1749                 cancel_delayed_work(&mvm->tdls_cs.dwork);
1750         }
1751
1752         /*
1753          * Make sure that the tx response code sees the station as -EBUSY and
1754          * calls the drain worker.
1755          */
1756         spin_lock_bh(&mvm_sta->lock);
1757
1758         /*
1759          * There are frames pending on the AC queues for this station.
1760          * We need to wait until all the frames are drained...
1761          */
1762         if (atomic_read(&mvm->pending_frames[sta_id])) {
1763                 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id],
1764                                    ERR_PTR(-EBUSY));
1765                 spin_unlock_bh(&mvm_sta->lock);
1766
1767                 /* disable TDLS sta queues on drain complete */
1768                 if (sta->tdls) {
1769                         mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk;
1770                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id);
1771                 }
1772
1773                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1774         } else {
1775                 spin_unlock_bh(&mvm_sta->lock);
1776
1777                 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1778                         iwl_mvm_tdls_sta_deinit(mvm, sta);
1779
1780                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1781                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1782         }
1783
1784         return ret;
1785 }
1786
1787 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1788                       struct ieee80211_vif *vif,
1789                       u8 sta_id)
1790 {
1791         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1792
1793         lockdep_assert_held(&mvm->mutex);
1794
1795         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1796         return ret;
1797 }
1798
1799 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1800                              struct iwl_mvm_int_sta *sta,
1801                              u32 qmask, enum nl80211_iftype iftype,
1802                              enum iwl_sta_type type)
1803 {
1804         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1805                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1806                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1807                         return -ENOSPC;
1808         }
1809
1810         sta->tfd_queue_msk = qmask;
1811         sta->type = type;
1812
1813         /* put a non-NULL value so iterating over the stations won't stop */
1814         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1815         return 0;
1816 }
1817
1818 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1819 {
1820         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1821         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1822         sta->sta_id = IWL_MVM_INVALID_STA;
1823 }
1824
1825 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1826                                       struct iwl_mvm_int_sta *sta,
1827                                       const u8 *addr,
1828                                       u16 mac_id, u16 color)
1829 {
1830         struct iwl_mvm_add_sta_cmd cmd;
1831         int ret;
1832         u32 status;
1833
1834         lockdep_assert_held(&mvm->mutex);
1835
1836         memset(&cmd, 0, sizeof(cmd));
1837         cmd.sta_id = sta->sta_id;
1838         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1839                                                              color));
1840         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1841                 cmd.station_type = sta->type;
1842
1843         if (!iwl_mvm_has_new_tx_api(mvm))
1844                 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1845         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1846
1847         if (addr)
1848                 memcpy(cmd.addr, addr, ETH_ALEN);
1849
1850         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1851                                           iwl_mvm_add_sta_cmd_size(mvm),
1852                                           &cmd, &status);
1853         if (ret)
1854                 return ret;
1855
1856         switch (status & IWL_ADD_STA_STATUS_MASK) {
1857         case ADD_STA_SUCCESS:
1858                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1859                 return 0;
1860         default:
1861                 ret = -EIO;
1862                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1863                         status);
1864                 break;
1865         }
1866         return ret;
1867 }
1868
1869 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm)
1870 {
1871         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1872                                         mvm->cfg->base_params->wd_timeout :
1873                                         IWL_WATCHDOG_DISABLED;
1874
1875         if (iwl_mvm_has_new_tx_api(mvm)) {
1876                 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue,
1877                                                     mvm->aux_sta.sta_id,
1878                                                     IWL_MAX_TID_COUNT,
1879                                                     wdg_timeout);
1880                 mvm->aux_queue = queue;
1881         } else if (iwl_mvm_is_dqa_supported(mvm)) {
1882                 struct iwl_trans_txq_scd_cfg cfg = {
1883                         .fifo = IWL_MVM_TX_FIFO_MCAST,
1884                         .sta_id = mvm->aux_sta.sta_id,
1885                         .tid = IWL_MAX_TID_COUNT,
1886                         .aggregate = false,
1887                         .frame_limit = IWL_FRAME_LIMIT,
1888                 };
1889
1890                 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1891                                    wdg_timeout);
1892         } else {
1893                 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1894                                       IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1895         }
1896 }
1897
1898 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1899 {
1900         int ret;
1901
1902         lockdep_assert_held(&mvm->mutex);
1903
1904         /* Allocate aux station and assign to it the aux queue */
1905         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1906                                        NL80211_IFTYPE_UNSPECIFIED,
1907                                        IWL_STA_AUX_ACTIVITY);
1908         if (ret)
1909                 return ret;
1910
1911         /* Map Aux queue to fifo - needs to happen before adding Aux station */
1912         if (!iwl_mvm_has_new_tx_api(mvm))
1913                 iwl_mvm_enable_aux_queue(mvm);
1914
1915         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1916                                          MAC_INDEX_AUX, 0);
1917         if (ret) {
1918                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1919                 return ret;
1920         }
1921
1922         /*
1923          * For a000 firmware and on we cannot add queue to a station unknown
1924          * to firmware so enable queue here - after the station was added
1925          */
1926         if (iwl_mvm_has_new_tx_api(mvm))
1927                 iwl_mvm_enable_aux_queue(mvm);
1928
1929         return 0;
1930 }
1931
1932 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1933 {
1934         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1935
1936         lockdep_assert_held(&mvm->mutex);
1937         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1938                                          mvmvif->id, 0);
1939 }
1940
1941 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1942 {
1943         int ret;
1944
1945         lockdep_assert_held(&mvm->mutex);
1946
1947         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1948         if (ret)
1949                 IWL_WARN(mvm, "Failed sending remove station\n");
1950
1951         return ret;
1952 }
1953
1954 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1955 {
1956         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1957 }
1958
1959 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1960 {
1961         lockdep_assert_held(&mvm->mutex);
1962
1963         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1964 }
1965
1966 /*
1967  * Send the add station command for the vif's broadcast station.
1968  * Assumes that the station was already allocated.
1969  *
1970  * @mvm: the mvm component
1971  * @vif: the interface to which the broadcast station is added
1972  * @bsta: the broadcast station to add.
1973  */
1974 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1975 {
1976         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1977         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1978         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1979         const u8 *baddr = _baddr;
1980         int queue;
1981         int ret;
1982         unsigned int wdg_timeout =
1983                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1984         struct iwl_trans_txq_scd_cfg cfg = {
1985                 .fifo = IWL_MVM_TX_FIFO_VO,
1986                 .sta_id = mvmvif->bcast_sta.sta_id,
1987                 .tid = IWL_MAX_TID_COUNT,
1988                 .aggregate = false,
1989                 .frame_limit = IWL_FRAME_LIMIT,
1990         };
1991
1992         lockdep_assert_held(&mvm->mutex);
1993
1994         if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1995                 if (vif->type == NL80211_IFTYPE_AP ||
1996                     vif->type == NL80211_IFTYPE_ADHOC)
1997                         queue = mvm->probe_queue;
1998                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1999                         queue = mvm->p2p_dev_queue;
2000                 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
2001                         return -EINVAL;
2002
2003                 bsta->tfd_queue_msk |= BIT(queue);
2004
2005                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
2006                                    &cfg, wdg_timeout);
2007         }
2008
2009         if (vif->type == NL80211_IFTYPE_ADHOC)
2010                 baddr = vif->bss_conf.bssid;
2011
2012         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2013                 return -ENOSPC;
2014
2015         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2016                                          mvmvif->id, mvmvif->color);
2017         if (ret)
2018                 return ret;
2019
2020         /*
2021          * For a000 firmware and on we cannot add queue to a station unknown
2022          * to firmware so enable queue here - after the station was added
2023          */
2024         if (iwl_mvm_has_new_tx_api(mvm)) {
2025                 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
2026                                                 bsta->sta_id,
2027                                                 IWL_MAX_TID_COUNT,
2028                                                 wdg_timeout);
2029
2030                 if (vif->type == NL80211_IFTYPE_AP ||
2031                     vif->type == NL80211_IFTYPE_ADHOC)
2032                         mvm->probe_queue = queue;
2033                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2034                         mvm->p2p_dev_queue = queue;
2035         }
2036
2037         return 0;
2038 }
2039
2040 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2041                                           struct ieee80211_vif *vif)
2042 {
2043         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2044         int queue;
2045
2046         lockdep_assert_held(&mvm->mutex);
2047
2048         iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
2049
2050         switch (vif->type) {
2051         case NL80211_IFTYPE_AP:
2052         case NL80211_IFTYPE_ADHOC:
2053                 queue = mvm->probe_queue;
2054                 break;
2055         case NL80211_IFTYPE_P2P_DEVICE:
2056                 queue = mvm->p2p_dev_queue;
2057                 break;
2058         default:
2059                 WARN(1, "Can't free bcast queue on vif type %d\n",
2060                      vif->type);
2061                 return;
2062         }
2063
2064         iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
2065         if (iwl_mvm_has_new_tx_api(mvm))
2066                 return;
2067
2068         WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2069         mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2070 }
2071
2072 /* Send the FW a request to remove the station from it's internal data
2073  * structures, but DO NOT remove the entry from the local data structures. */
2074 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2075 {
2076         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2077         int ret;
2078
2079         lockdep_assert_held(&mvm->mutex);
2080
2081         if (iwl_mvm_is_dqa_supported(mvm))
2082                 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2083
2084         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2085         if (ret)
2086                 IWL_WARN(mvm, "Failed sending remove station\n");
2087         return ret;
2088 }
2089
2090 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2091 {
2092         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2093         u32 qmask = 0;
2094
2095         lockdep_assert_held(&mvm->mutex);
2096
2097         if (!iwl_mvm_is_dqa_supported(mvm)) {
2098                 qmask = iwl_mvm_mac_get_queues_mask(vif);
2099
2100                 /*
2101                  * The firmware defines the TFD queue mask to only be relevant
2102                  * for *unicast* queues, so the multicast (CAB) queue shouldn't
2103                  * be included. This only happens in NL80211_IFTYPE_AP vif type,
2104                  * so the next line will only have an effect there.
2105                  */
2106                 qmask &= ~BIT(vif->cab_queue);
2107         }
2108
2109         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
2110                                         ieee80211_vif_type_p2p(vif),
2111                                         IWL_STA_GENERAL_PURPOSE);
2112 }
2113
2114 /* Allocate a new station entry for the broadcast station to the given vif,
2115  * and send it to the FW.
2116  * Note that each P2P mac should have its own broadcast station.
2117  *
2118  * @mvm: the mvm component
2119  * @vif: the interface to which the broadcast station is added
2120  * @bsta: the broadcast station to add. */
2121 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2122 {
2123         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2124         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2125         int ret;
2126
2127         lockdep_assert_held(&mvm->mutex);
2128
2129         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2130         if (ret)
2131                 return ret;
2132
2133         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2134
2135         if (ret)
2136                 iwl_mvm_dealloc_int_sta(mvm, bsta);
2137
2138         return ret;
2139 }
2140
2141 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2142 {
2143         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2144
2145         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2146 }
2147
2148 /*
2149  * Send the FW a request to remove the station from it's internal data
2150  * structures, and in addition remove it from the local data structure.
2151  */
2152 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2153 {
2154         int ret;
2155
2156         lockdep_assert_held(&mvm->mutex);
2157
2158         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2159
2160         iwl_mvm_dealloc_bcast_sta(mvm, vif);
2161
2162         return ret;
2163 }
2164
2165 /*
2166  * Allocate a new station entry for the multicast station to the given vif,
2167  * and send it to the FW.
2168  * Note that each AP/GO mac should have its own multicast station.
2169  *
2170  * @mvm: the mvm component
2171  * @vif: the interface to which the multicast station is added
2172  */
2173 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2174 {
2175         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2176         struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2177         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2178         const u8 *maddr = _maddr;
2179         struct iwl_trans_txq_scd_cfg cfg = {
2180                 .fifo = IWL_MVM_TX_FIFO_MCAST,
2181                 .sta_id = msta->sta_id,
2182                 .tid = IWL_MAX_TID_COUNT,
2183                 .aggregate = false,
2184                 .frame_limit = IWL_FRAME_LIMIT,
2185         };
2186         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2187         int ret;
2188
2189         lockdep_assert_held(&mvm->mutex);
2190
2191         if (!iwl_mvm_is_dqa_supported(mvm))
2192                 return 0;
2193
2194         if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2195                     vif->type != NL80211_IFTYPE_ADHOC))
2196                 return -ENOTSUPP;
2197
2198         /*
2199          * While in previous FWs we had to exclude cab queue from TFD queue
2200          * mask, now it is needed as any other queue.
2201          */
2202         if (!iwl_mvm_has_new_tx_api(mvm) &&
2203             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2204                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2205                                    &cfg, timeout);
2206                 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2207         }
2208         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2209                                          mvmvif->id, mvmvif->color);
2210         if (ret) {
2211                 iwl_mvm_dealloc_int_sta(mvm, msta);
2212                 return ret;
2213         }
2214
2215         /*
2216          * Enable cab queue after the ADD_STA command is sent.
2217          * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2218          * command with unknown station id, and for FW that doesn't support
2219          * station API since the cab queue is not included in the
2220          * tfd_queue_mask.
2221          */
2222         if (iwl_mvm_has_new_tx_api(mvm)) {
2223                 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2224                                                     msta->sta_id,
2225                                                     IWL_MAX_TID_COUNT,
2226                                                     timeout);
2227                 mvmvif->cab_queue = queue;
2228         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2229                                IWL_UCODE_TLV_API_STA_TYPE)) {
2230                 /*
2231                  * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2232                  * invalid, so make sure we use the queue we want.
2233                  * Note that this is done here as we want to avoid making DQA
2234                  * changes in mac80211 layer.
2235                  */
2236                 if (vif->type == NL80211_IFTYPE_ADHOC) {
2237                         vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2238                         mvmvif->cab_queue = vif->cab_queue;
2239                 }
2240                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2241                                    &cfg, timeout);
2242         }
2243
2244         return 0;
2245 }
2246
2247 /*
2248  * Send the FW a request to remove the station from it's internal data
2249  * structures, and in addition remove it from the local data structure.
2250  */
2251 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2252 {
2253         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2254         int ret;
2255
2256         lockdep_assert_held(&mvm->mutex);
2257
2258         if (!iwl_mvm_is_dqa_supported(mvm))
2259                 return 0;
2260
2261         iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2262
2263         iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2264                             IWL_MAX_TID_COUNT, 0);
2265
2266         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2267         if (ret)
2268                 IWL_WARN(mvm, "Failed sending remove station\n");
2269
2270         return ret;
2271 }
2272
2273 #define IWL_MAX_RX_BA_SESSIONS 16
2274
2275 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2276 {
2277         struct iwl_mvm_delba_notif notif = {
2278                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2279                 .metadata.sync = 1,
2280                 .delba.baid = baid,
2281         };
2282         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2283 };
2284
2285 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2286                                  struct iwl_mvm_baid_data *data)
2287 {
2288         int i;
2289
2290         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2291
2292         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2293                 int j;
2294                 struct iwl_mvm_reorder_buffer *reorder_buf =
2295                         &data->reorder_buf[i];
2296
2297                 spin_lock_bh(&reorder_buf->lock);
2298                 if (likely(!reorder_buf->num_stored)) {
2299                         spin_unlock_bh(&reorder_buf->lock);
2300                         continue;
2301                 }
2302
2303                 /*
2304                  * This shouldn't happen in regular DELBA since the internal
2305                  * delBA notification should trigger a release of all frames in
2306                  * the reorder buffer.
2307                  */
2308                 WARN_ON(1);
2309
2310                 for (j = 0; j < reorder_buf->buf_size; j++)
2311                         __skb_queue_purge(&reorder_buf->entries[j]);
2312                 /*
2313                  * Prevent timer re-arm. This prevents a very far fetched case
2314                  * where we timed out on the notification. There may be prior
2315                  * RX frames pending in the RX queue before the notification
2316                  * that might get processed between now and the actual deletion
2317                  * and we would re-arm the timer although we are deleting the
2318                  * reorder buffer.
2319                  */
2320                 reorder_buf->removed = true;
2321                 spin_unlock_bh(&reorder_buf->lock);
2322                 del_timer_sync(&reorder_buf->reorder_timer);
2323         }
2324 }
2325
2326 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2327                                         u32 sta_id,
2328                                         struct iwl_mvm_baid_data *data,
2329                                         u16 ssn, u8 buf_size)
2330 {
2331         int i;
2332
2333         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2334                 struct iwl_mvm_reorder_buffer *reorder_buf =
2335                         &data->reorder_buf[i];
2336                 int j;
2337
2338                 reorder_buf->num_stored = 0;
2339                 reorder_buf->head_sn = ssn;
2340                 reorder_buf->buf_size = buf_size;
2341                 /* rx reorder timer */
2342                 reorder_buf->reorder_timer.function =
2343                         iwl_mvm_reorder_timer_expired;
2344                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2345                 init_timer(&reorder_buf->reorder_timer);
2346                 spin_lock_init(&reorder_buf->lock);
2347                 reorder_buf->mvm = mvm;
2348                 reorder_buf->queue = i;
2349                 reorder_buf->sta_id = sta_id;
2350                 reorder_buf->valid = false;
2351                 for (j = 0; j < reorder_buf->buf_size; j++)
2352                         __skb_queue_head_init(&reorder_buf->entries[j]);
2353         }
2354 }
2355
2356 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2357                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2358 {
2359         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2360         struct iwl_mvm_add_sta_cmd cmd = {};
2361         struct iwl_mvm_baid_data *baid_data = NULL;
2362         int ret;
2363         u32 status;
2364
2365         lockdep_assert_held(&mvm->mutex);
2366
2367         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2368                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2369                 return -ENOSPC;
2370         }
2371
2372         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2373                 /*
2374                  * Allocate here so if allocation fails we can bail out early
2375                  * before starting the BA session in the firmware
2376                  */
2377                 baid_data = kzalloc(sizeof(*baid_data) +
2378                                     mvm->trans->num_rx_queues *
2379                                     sizeof(baid_data->reorder_buf[0]),
2380                                     GFP_KERNEL);
2381                 if (!baid_data)
2382                         return -ENOMEM;
2383         }
2384
2385         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2386         cmd.sta_id = mvm_sta->sta_id;
2387         cmd.add_modify = STA_MODE_MODIFY;
2388         if (start) {
2389                 cmd.add_immediate_ba_tid = (u8) tid;
2390                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2391                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2392         } else {
2393                 cmd.remove_immediate_ba_tid = (u8) tid;
2394         }
2395         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2396                                   STA_MODIFY_REMOVE_BA_TID;
2397
2398         status = ADD_STA_SUCCESS;
2399         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2400                                           iwl_mvm_add_sta_cmd_size(mvm),
2401                                           &cmd, &status);
2402         if (ret)
2403                 goto out_free;
2404
2405         switch (status & IWL_ADD_STA_STATUS_MASK) {
2406         case ADD_STA_SUCCESS:
2407                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2408                              start ? "start" : "stopp");
2409                 break;
2410         case ADD_STA_IMMEDIATE_BA_FAILURE:
2411                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2412                 ret = -ENOSPC;
2413                 break;
2414         default:
2415                 ret = -EIO;
2416                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2417                         start ? "start" : "stopp", status);
2418                 break;
2419         }
2420
2421         if (ret)
2422                 goto out_free;
2423
2424         if (start) {
2425                 u8 baid;
2426
2427                 mvm->rx_ba_sessions++;
2428
2429                 if (!iwl_mvm_has_new_rx_api(mvm))
2430                         return 0;
2431
2432                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2433                         ret = -EINVAL;
2434                         goto out_free;
2435                 }
2436                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2437                             IWL_ADD_STA_BAID_SHIFT);
2438                 baid_data->baid = baid;
2439                 baid_data->timeout = timeout;
2440                 baid_data->last_rx = jiffies;
2441                 setup_timer(&baid_data->session_timer,
2442                             iwl_mvm_rx_agg_session_expired,
2443                             (unsigned long)&mvm->baid_map[baid]);
2444                 baid_data->mvm = mvm;
2445                 baid_data->tid = tid;
2446                 baid_data->sta_id = mvm_sta->sta_id;
2447
2448                 mvm_sta->tid_to_baid[tid] = baid;
2449                 if (timeout)
2450                         mod_timer(&baid_data->session_timer,
2451                                   TU_TO_EXP_TIME(timeout * 2));
2452
2453                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2454                                             baid_data, ssn, buf_size);
2455                 /*
2456                  * protect the BA data with RCU to cover a case where our
2457                  * internal RX sync mechanism will timeout (not that it's
2458                  * supposed to happen) and we will free the session data while
2459                  * RX is being processed in parallel
2460                  */
2461                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2462                              mvm_sta->sta_id, tid, baid);
2463                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2464                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2465         } else  {
2466                 u8 baid = mvm_sta->tid_to_baid[tid];
2467
2468                 if (mvm->rx_ba_sessions > 0)
2469                         /* check that restart flow didn't zero the counter */
2470                         mvm->rx_ba_sessions--;
2471                 if (!iwl_mvm_has_new_rx_api(mvm))
2472                         return 0;
2473
2474                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2475                         return -EINVAL;
2476
2477                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2478                 if (WARN_ON(!baid_data))
2479                         return -EINVAL;
2480
2481                 /* synchronize all rx queues so we can safely delete */
2482                 iwl_mvm_free_reorder(mvm, baid_data);
2483                 del_timer_sync(&baid_data->session_timer);
2484                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2485                 kfree_rcu(baid_data, rcu_head);
2486                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2487         }
2488         return 0;
2489
2490 out_free:
2491         kfree(baid_data);
2492         return ret;
2493 }
2494
2495 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2496                        int tid, u8 queue, bool start)
2497 {
2498         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2499         struct iwl_mvm_add_sta_cmd cmd = {};
2500         int ret;
2501         u32 status;
2502
2503         lockdep_assert_held(&mvm->mutex);
2504
2505         if (start) {
2506                 mvm_sta->tfd_queue_msk |= BIT(queue);
2507                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2508         } else {
2509                 /* In DQA-mode the queue isn't removed on agg termination */
2510                 if (!iwl_mvm_is_dqa_supported(mvm))
2511                         mvm_sta->tfd_queue_msk &= ~BIT(queue);
2512                 mvm_sta->tid_disable_agg |= BIT(tid);
2513         }
2514
2515         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2516         cmd.sta_id = mvm_sta->sta_id;
2517         cmd.add_modify = STA_MODE_MODIFY;
2518         if (!iwl_mvm_has_new_tx_api(mvm))
2519                 cmd.modify_mask = STA_MODIFY_QUEUES;
2520         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2521         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2522         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2523
2524         status = ADD_STA_SUCCESS;
2525         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2526                                           iwl_mvm_add_sta_cmd_size(mvm),
2527                                           &cmd, &status);
2528         if (ret)
2529                 return ret;
2530
2531         switch (status & IWL_ADD_STA_STATUS_MASK) {
2532         case ADD_STA_SUCCESS:
2533                 break;
2534         default:
2535                 ret = -EIO;
2536                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2537                         start ? "start" : "stopp", status);
2538                 break;
2539         }
2540
2541         return ret;
2542 }
2543
2544 const u8 tid_to_mac80211_ac[] = {
2545         IEEE80211_AC_BE,
2546         IEEE80211_AC_BK,
2547         IEEE80211_AC_BK,
2548         IEEE80211_AC_BE,
2549         IEEE80211_AC_VI,
2550         IEEE80211_AC_VI,
2551         IEEE80211_AC_VO,
2552         IEEE80211_AC_VO,
2553         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2554 };
2555
2556 static const u8 tid_to_ucode_ac[] = {
2557         AC_BE,
2558         AC_BK,
2559         AC_BK,
2560         AC_BE,
2561         AC_VI,
2562         AC_VI,
2563         AC_VO,
2564         AC_VO,
2565 };
2566
2567 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2568                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2569 {
2570         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2571         struct iwl_mvm_tid_data *tid_data;
2572         u16 normalized_ssn;
2573         int txq_id;
2574         int ret;
2575
2576         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2577                 return -EINVAL;
2578
2579         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2580                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2581                         mvmsta->tid_data[tid].state);
2582                 return -ENXIO;
2583         }
2584
2585         lockdep_assert_held(&mvm->mutex);
2586
2587         spin_lock_bh(&mvmsta->lock);
2588
2589         /* possible race condition - we entered D0i3 while starting agg */
2590         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2591                 spin_unlock_bh(&mvmsta->lock);
2592                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2593                 return -EIO;
2594         }
2595
2596         spin_lock(&mvm->queue_info_lock);
2597
2598         /*
2599          * Note the possible cases:
2600          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2601          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2602          *      one and mark it as reserved
2603          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2604          *      non-DQA mode, since the TXQ hasn't yet been allocated
2605          * Don't support case 3 for new TX path as it is not expected to happen
2606          * and aggregation will be offloaded soon anyway
2607          */
2608         txq_id = mvmsta->tid_data[tid].txq_id;
2609         if (iwl_mvm_has_new_tx_api(mvm)) {
2610                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2611                         ret = -ENXIO;
2612                         goto release_locks;
2613                 }
2614         } else if (iwl_mvm_is_dqa_supported(mvm) &&
2615                    unlikely(mvm->queue_info[txq_id].status ==
2616                             IWL_MVM_QUEUE_SHARED)) {
2617                 ret = -ENXIO;
2618                 IWL_DEBUG_TX_QUEUES(mvm,
2619                                     "Can't start tid %d agg on shared queue!\n",
2620                                     tid);
2621                 goto release_locks;
2622         } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2623             mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2624                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2625                                                  mvm->first_agg_queue,
2626                                                  mvm->last_agg_queue);
2627                 if (txq_id < 0) {
2628                         ret = txq_id;
2629                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2630                         goto release_locks;
2631                 }
2632                 /*
2633                  * TXQ shouldn't be in inactive mode for non-DQA, so getting
2634                  * an inactive queue from iwl_mvm_find_free_queue() is
2635                  * certainly a bug
2636                  */
2637                 WARN_ON(mvm->queue_info[txq_id].status ==
2638                         IWL_MVM_QUEUE_INACTIVE);
2639
2640                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2641                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2642         }
2643
2644         spin_unlock(&mvm->queue_info_lock);
2645
2646         IWL_DEBUG_TX_QUEUES(mvm,
2647                             "AGG for tid %d will be on queue #%d\n",
2648                             tid, txq_id);
2649
2650         tid_data = &mvmsta->tid_data[tid];
2651         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2652         tid_data->txq_id = txq_id;
2653         *ssn = tid_data->ssn;
2654
2655         IWL_DEBUG_TX_QUEUES(mvm,
2656                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2657                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2658                             tid_data->next_reclaimed);
2659
2660         /*
2661          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
2662          * to align the wrap around of ssn so we compare relevant values.
2663          */
2664         normalized_ssn = tid_data->ssn;
2665         if (mvm->trans->cfg->gen2)
2666                 normalized_ssn &= 0xff;
2667
2668         if (normalized_ssn == tid_data->next_reclaimed) {
2669                 tid_data->state = IWL_AGG_STARTING;
2670                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2671         } else {
2672                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2673         }
2674
2675         ret = 0;
2676         goto out;
2677
2678 release_locks:
2679         spin_unlock(&mvm->queue_info_lock);
2680 out:
2681         spin_unlock_bh(&mvmsta->lock);
2682
2683         return ret;
2684 }
2685
2686 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2687                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2688                             bool amsdu)
2689 {
2690         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2691         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2692         unsigned int wdg_timeout =
2693                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2694         int queue, ret;
2695         bool alloc_queue = true;
2696         enum iwl_mvm_queue_status queue_status;
2697         u16 ssn;
2698
2699         struct iwl_trans_txq_scd_cfg cfg = {
2700                 .sta_id = mvmsta->sta_id,
2701                 .tid = tid,
2702                 .frame_limit = buf_size,
2703                 .aggregate = true,
2704         };
2705
2706         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2707                      != IWL_MAX_TID_COUNT);
2708
2709         if (!mvm->trans->cfg->gen2)
2710                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2711         else
2712                 buf_size = min_t(int, buf_size,
2713                                  LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF);
2714
2715         spin_lock_bh(&mvmsta->lock);
2716         ssn = tid_data->ssn;
2717         queue = tid_data->txq_id;
2718         tid_data->state = IWL_AGG_ON;
2719         mvmsta->agg_tids |= BIT(tid);
2720         tid_data->ssn = 0xffff;
2721         tid_data->amsdu_in_ampdu_allowed = amsdu;
2722         spin_unlock_bh(&mvmsta->lock);
2723
2724         if (iwl_mvm_has_new_tx_api(mvm)) {
2725                 /*
2726                  * If no queue iwl_mvm_sta_tx_agg_start() would have failed so
2727                  * no need to check queue's status
2728                  */
2729                 if (buf_size < mvmsta->max_agg_bufsize)
2730                         return -ENOTSUPP;
2731
2732                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2733                 if (ret)
2734                         return -EIO;
2735                 goto out;
2736         }
2737
2738         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2739
2740         spin_lock_bh(&mvm->queue_info_lock);
2741         queue_status = mvm->queue_info[queue].status;
2742         spin_unlock_bh(&mvm->queue_info_lock);
2743
2744         /* In DQA mode, the existing queue might need to be reconfigured */
2745         if (iwl_mvm_is_dqa_supported(mvm)) {
2746                 /* Maybe there is no need to even alloc a queue... */
2747                 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2748                         alloc_queue = false;
2749
2750                 /*
2751                  * Only reconfig the SCD for the queue if the window size has
2752                  * changed from current (become smaller)
2753                  */
2754                 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2755                         /*
2756                          * If reconfiguring an existing queue, it first must be
2757                          * drained
2758                          */
2759                         ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2760                                                              BIT(queue));
2761                         if (ret) {
2762                                 IWL_ERR(mvm,
2763                                         "Error draining queue before reconfig\n");
2764                                 return ret;
2765                         }
2766
2767                         ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2768                                                    mvmsta->sta_id, tid,
2769                                                    buf_size, ssn);
2770                         if (ret) {
2771                                 IWL_ERR(mvm,
2772                                         "Error reconfiguring TXQ #%d\n", queue);
2773                                 return ret;
2774                         }
2775                 }
2776         }
2777
2778         if (alloc_queue)
2779                 iwl_mvm_enable_txq(mvm, queue,
2780                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2781                                    &cfg, wdg_timeout);
2782
2783         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2784         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2785                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2786                 if (ret)
2787                         return -EIO;
2788         }
2789
2790         /* No need to mark as reserved */
2791         spin_lock_bh(&mvm->queue_info_lock);
2792         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2793         spin_unlock_bh(&mvm->queue_info_lock);
2794
2795 out:
2796         /*
2797          * Even though in theory the peer could have different
2798          * aggregation reorder buffer sizes for different sessions,
2799          * our ucode doesn't allow for that and has a global limit
2800          * for each station. Therefore, use the minimum of all the
2801          * aggregation sessions and our default value.
2802          */
2803         mvmsta->max_agg_bufsize =
2804                 min(mvmsta->max_agg_bufsize, buf_size);
2805         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2806
2807         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2808                      sta->addr, tid);
2809
2810         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2811 }
2812
2813 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2814                                         struct iwl_mvm_sta *mvmsta,
2815                                         u16 txq_id)
2816 {
2817         if (iwl_mvm_has_new_tx_api(mvm))
2818                 return;
2819
2820         spin_lock_bh(&mvm->queue_info_lock);
2821         /*
2822          * The TXQ is marked as reserved only if no traffic came through yet
2823          * This means no traffic has been sent on this TID (agg'd or not), so
2824          * we no longer have use for the queue. Since it hasn't even been
2825          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2826          * free.
2827          */
2828         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2829                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2830
2831         spin_unlock_bh(&mvm->queue_info_lock);
2832 }
2833
2834 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2835                             struct ieee80211_sta *sta, u16 tid)
2836 {
2837         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2838         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2839         u16 txq_id;
2840         int err;
2841
2842         /*
2843          * If mac80211 is cleaning its state, then say that we finished since
2844          * our state has been cleared anyway.
2845          */
2846         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2847                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2848                 return 0;
2849         }
2850
2851         spin_lock_bh(&mvmsta->lock);
2852
2853         txq_id = tid_data->txq_id;
2854
2855         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2856                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2857
2858         mvmsta->agg_tids &= ~BIT(tid);
2859
2860         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2861
2862         switch (tid_data->state) {
2863         case IWL_AGG_ON:
2864                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2865
2866                 IWL_DEBUG_TX_QUEUES(mvm,
2867                                     "ssn = %d, next_recl = %d\n",
2868                                     tid_data->ssn, tid_data->next_reclaimed);
2869
2870                 /*
2871                  * There are still packets for this RA / TID in the HW.
2872                  * Not relevant for DQA mode, since there is no need to disable
2873                  * the queue.
2874                  */
2875                 if (!iwl_mvm_is_dqa_supported(mvm) &&
2876                     tid_data->ssn != tid_data->next_reclaimed) {
2877                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2878                         err = 0;
2879                         break;
2880                 }
2881
2882                 tid_data->ssn = 0xffff;
2883                 tid_data->state = IWL_AGG_OFF;
2884                 spin_unlock_bh(&mvmsta->lock);
2885
2886                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2887
2888                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2889
2890                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2891                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2892
2893                         iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2894                 }
2895                 return 0;
2896         case IWL_AGG_STARTING:
2897         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2898                 /*
2899                  * The agg session has been stopped before it was set up. This
2900                  * can happen when the AddBA timer times out for example.
2901                  */
2902
2903                 /* No barriers since we are under mutex */
2904                 lockdep_assert_held(&mvm->mutex);
2905
2906                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2907                 tid_data->state = IWL_AGG_OFF;
2908                 err = 0;
2909                 break;
2910         default:
2911                 IWL_ERR(mvm,
2912                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2913                         mvmsta->sta_id, tid, tid_data->state);
2914                 IWL_ERR(mvm,
2915                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2916                 err = -EINVAL;
2917         }
2918
2919         spin_unlock_bh(&mvmsta->lock);
2920
2921         return err;
2922 }
2923
2924 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2925                             struct ieee80211_sta *sta, u16 tid)
2926 {
2927         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2928         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2929         u16 txq_id;
2930         enum iwl_mvm_agg_state old_state;
2931
2932         /*
2933          * First set the agg state to OFF to avoid calling
2934          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2935          */
2936         spin_lock_bh(&mvmsta->lock);
2937         txq_id = tid_data->txq_id;
2938         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2939                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2940         old_state = tid_data->state;
2941         tid_data->state = IWL_AGG_OFF;
2942         mvmsta->agg_tids &= ~BIT(tid);
2943         spin_unlock_bh(&mvmsta->lock);
2944
2945         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2946
2947         if (old_state >= IWL_AGG_ON) {
2948                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2949
2950                 if (iwl_mvm_has_new_tx_api(mvm)) {
2951                         if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2952                                                    BIT(tid), 0))
2953                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2954                         iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2955                 } else {
2956                         if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2957                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2958                         iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2959                 }
2960
2961                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2962
2963                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2964
2965                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2966                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2967
2968                         iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2969                                             tid, 0);
2970                 }
2971         }
2972
2973         return 0;
2974 }
2975
2976 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2977 {
2978         int i, max = -1, max_offs = -1;
2979
2980         lockdep_assert_held(&mvm->mutex);
2981
2982         /* Pick the unused key offset with the highest 'deleted'
2983          * counter. Every time a key is deleted, all the counters
2984          * are incremented and the one that was just deleted is
2985          * reset to zero. Thus, the highest counter is the one
2986          * that was deleted longest ago. Pick that one.
2987          */
2988         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2989                 if (test_bit(i, mvm->fw_key_table))
2990                         continue;
2991                 if (mvm->fw_key_deleted[i] > max) {
2992                         max = mvm->fw_key_deleted[i];
2993                         max_offs = i;
2994                 }
2995         }
2996
2997         if (max_offs < 0)
2998                 return STA_KEY_IDX_INVALID;
2999
3000         return max_offs;
3001 }
3002
3003 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3004                                                struct ieee80211_vif *vif,
3005                                                struct ieee80211_sta *sta)
3006 {
3007         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3008
3009         if (sta)
3010                 return iwl_mvm_sta_from_mac80211(sta);
3011
3012         /*
3013          * The device expects GTKs for station interfaces to be
3014          * installed as GTKs for the AP station. If we have no
3015          * station ID, then use AP's station ID.
3016          */
3017         if (vif->type == NL80211_IFTYPE_STATION &&
3018             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3019                 u8 sta_id = mvmvif->ap_sta_id;
3020
3021                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3022                                             lockdep_is_held(&mvm->mutex));
3023
3024                 /*
3025                  * It is possible that the 'sta' parameter is NULL,
3026                  * for example when a GTK is removed - the sta_id will then
3027                  * be the AP ID, and no station was passed by mac80211.
3028                  */
3029                 if (IS_ERR_OR_NULL(sta))
3030                         return NULL;
3031
3032                 return iwl_mvm_sta_from_mac80211(sta);
3033         }
3034
3035         return NULL;
3036 }
3037
3038 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3039                                 u32 sta_id,
3040                                 struct ieee80211_key_conf *key, bool mcast,
3041                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3042                                 u8 key_offset)
3043 {
3044         union {
3045                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3046                 struct iwl_mvm_add_sta_key_cmd cmd;
3047         } u = {};
3048         __le16 key_flags;
3049         int ret;
3050         u32 status;
3051         u16 keyidx;
3052         u64 pn = 0;
3053         int i, size;
3054         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3055                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3056
3057         if (sta_id == IWL_MVM_INVALID_STA)
3058                 return -EINVAL;
3059
3060         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3061                  STA_KEY_FLG_KEYID_MSK;
3062         key_flags = cpu_to_le16(keyidx);
3063         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3064
3065         switch (key->cipher) {
3066         case WLAN_CIPHER_SUITE_TKIP:
3067                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3068                 if (new_api) {
3069                         memcpy((void *)&u.cmd.tx_mic_key,
3070                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3071                                IWL_MIC_KEY_SIZE);
3072
3073                         memcpy((void *)&u.cmd.rx_mic_key,
3074                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3075                                IWL_MIC_KEY_SIZE);
3076                         pn = atomic64_read(&key->tx_pn);
3077
3078                 } else {
3079                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3080                         for (i = 0; i < 5; i++)
3081                                 u.cmd_v1.tkip_rx_ttak[i] =
3082                                         cpu_to_le16(tkip_p1k[i]);
3083                 }
3084                 memcpy(u.cmd.common.key, key->key, key->keylen);
3085                 break;
3086         case WLAN_CIPHER_SUITE_CCMP:
3087                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3088                 memcpy(u.cmd.common.key, key->key, key->keylen);
3089                 if (new_api)
3090                         pn = atomic64_read(&key->tx_pn);
3091                 break;
3092         case WLAN_CIPHER_SUITE_WEP104:
3093                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3094                 /* fall through */
3095         case WLAN_CIPHER_SUITE_WEP40:
3096                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3097                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3098                 break;
3099         case WLAN_CIPHER_SUITE_GCMP_256:
3100                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3101                 /* fall through */
3102         case WLAN_CIPHER_SUITE_GCMP:
3103                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3104                 memcpy(u.cmd.common.key, key->key, key->keylen);
3105                 if (new_api)
3106                         pn = atomic64_read(&key->tx_pn);
3107                 break;
3108         default:
3109                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3110                 memcpy(u.cmd.common.key, key->key, key->keylen);
3111         }
3112
3113         if (mcast)
3114                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3115
3116         u.cmd.common.key_offset = key_offset;
3117         u.cmd.common.key_flags = key_flags;
3118         u.cmd.common.sta_id = sta_id;
3119
3120         if (new_api) {
3121                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3122                 size = sizeof(u.cmd);
3123         } else {
3124                 size = sizeof(u.cmd_v1);
3125         }
3126
3127         status = ADD_STA_SUCCESS;
3128         if (cmd_flags & CMD_ASYNC)
3129                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3130                                            &u.cmd);
3131         else
3132                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3133                                                   &u.cmd, &status);
3134
3135         switch (status) {
3136         case ADD_STA_SUCCESS:
3137                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3138                 break;
3139         default:
3140                 ret = -EIO;
3141                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3142                 break;
3143         }
3144
3145         return ret;
3146 }
3147
3148 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3149                                  struct ieee80211_key_conf *keyconf,
3150                                  u8 sta_id, bool remove_key)
3151 {
3152         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3153
3154         /* verify the key details match the required command's expectations */
3155         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3156                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3157                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3158                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3159                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3160                 return -EINVAL;
3161
3162         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3163                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3164                 return -EINVAL;
3165
3166         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3167         igtk_cmd.sta_id = cpu_to_le32(sta_id);
3168
3169         if (remove_key) {
3170                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3171         } else {
3172                 struct ieee80211_key_seq seq;
3173                 const u8 *pn;
3174
3175                 switch (keyconf->cipher) {
3176                 case WLAN_CIPHER_SUITE_AES_CMAC:
3177                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3178                         break;
3179                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3180                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3181                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3182                         break;
3183                 default:
3184                         return -EINVAL;
3185                 }
3186
3187                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3188                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3189                         igtk_cmd.ctrl_flags |=
3190                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3191                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3192                 pn = seq.aes_cmac.pn;
3193                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3194                                                        ((u64) pn[4] << 8) |
3195                                                        ((u64) pn[3] << 16) |
3196                                                        ((u64) pn[2] << 24) |
3197                                                        ((u64) pn[1] << 32) |
3198                                                        ((u64) pn[0] << 40));
3199         }
3200
3201         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3202                        remove_key ? "removing" : "installing",
3203                        igtk_cmd.sta_id);
3204
3205         if (!iwl_mvm_has_new_rx_api(mvm)) {
3206                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3207                         .ctrl_flags = igtk_cmd.ctrl_flags,
3208                         .key_id = igtk_cmd.key_id,
3209                         .sta_id = igtk_cmd.sta_id,
3210                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3211                 };
3212
3213                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3214                        ARRAY_SIZE(igtk_cmd_v1.igtk));
3215                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3216                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3217         }
3218         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3219                                     sizeof(igtk_cmd), &igtk_cmd);
3220 }
3221
3222
3223 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3224                                        struct ieee80211_vif *vif,
3225                                        struct ieee80211_sta *sta)
3226 {
3227         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3228
3229         if (sta)
3230                 return sta->addr;
3231
3232         if (vif->type == NL80211_IFTYPE_STATION &&
3233             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3234                 u8 sta_id = mvmvif->ap_sta_id;
3235                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3236                                                 lockdep_is_held(&mvm->mutex));
3237                 return sta->addr;
3238         }
3239
3240
3241         return NULL;
3242 }
3243
3244 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3245                                  struct ieee80211_vif *vif,
3246                                  struct ieee80211_sta *sta,
3247                                  struct ieee80211_key_conf *keyconf,
3248                                  u8 key_offset,
3249                                  bool mcast)
3250 {
3251         int ret;
3252         const u8 *addr;
3253         struct ieee80211_key_seq seq;
3254         u16 p1k[5];
3255         u32 sta_id;
3256
3257         if (sta) {
3258                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3259
3260                 sta_id = mvm_sta->sta_id;
3261         } else if (vif->type == NL80211_IFTYPE_AP &&
3262                    !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3263                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3264
3265                 sta_id = mvmvif->mcast_sta.sta_id;
3266         } else {
3267                 IWL_ERR(mvm, "Failed to find station id\n");
3268                 return -EINVAL;
3269         }
3270
3271         switch (keyconf->cipher) {
3272         case WLAN_CIPHER_SUITE_TKIP:
3273                 if (vif->type == NL80211_IFTYPE_AP) {
3274                         ret = -EINVAL;
3275                         break;
3276                 }
3277                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3278                 /* get phase 1 key from mac80211 */
3279                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3280                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3281                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3282                                            seq.tkip.iv32, p1k, 0, key_offset);
3283                 break;
3284         case WLAN_CIPHER_SUITE_CCMP:
3285         case WLAN_CIPHER_SUITE_WEP40:
3286         case WLAN_CIPHER_SUITE_WEP104:
3287         case WLAN_CIPHER_SUITE_GCMP:
3288         case WLAN_CIPHER_SUITE_GCMP_256:
3289                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3290                                            0, NULL, 0, key_offset);
3291                 break;
3292         default:
3293                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3294                                            0, NULL, 0, key_offset);
3295         }
3296
3297         return ret;
3298 }
3299
3300 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3301                                     struct ieee80211_key_conf *keyconf,
3302                                     bool mcast)
3303 {
3304         union {
3305                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3306                 struct iwl_mvm_add_sta_key_cmd cmd;
3307         } u = {};
3308         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3309                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3310         __le16 key_flags;
3311         int ret, size;
3312         u32 status;
3313
3314         if (sta_id == IWL_MVM_INVALID_STA)
3315                 return -EINVAL;
3316
3317         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3318                                  STA_KEY_FLG_KEYID_MSK);
3319         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3320         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3321
3322         if (mcast)
3323                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3324
3325         /*
3326          * The fields assigned here are in the same location at the start
3327          * of the command, so we can do this union trick.
3328          */
3329         u.cmd.common.key_flags = key_flags;
3330         u.cmd.common.key_offset = keyconf->hw_key_idx;
3331         u.cmd.common.sta_id = sta_id;
3332
3333         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3334
3335         status = ADD_STA_SUCCESS;
3336         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3337                                           &status);
3338
3339         switch (status) {
3340         case ADD_STA_SUCCESS:
3341                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3342                 break;
3343         default:
3344                 ret = -EIO;
3345                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3346                 break;
3347         }
3348
3349         return ret;
3350 }
3351
3352 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3353                         struct ieee80211_vif *vif,
3354                         struct ieee80211_sta *sta,
3355                         struct ieee80211_key_conf *keyconf,
3356                         u8 key_offset)
3357 {
3358         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3359         struct iwl_mvm_sta *mvm_sta;
3360         u8 sta_id = IWL_MVM_INVALID_STA;
3361         int ret;
3362         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3363
3364         lockdep_assert_held(&mvm->mutex);
3365
3366         if (vif->type != NL80211_IFTYPE_AP ||
3367             keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3368                 /* Get the station id from the mvm local station table */
3369                 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3370                 if (!mvm_sta) {
3371                         IWL_ERR(mvm, "Failed to find station\n");
3372                         return -EINVAL;
3373                 }
3374                 sta_id = mvm_sta->sta_id;
3375
3376                 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3377                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3378                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3379                         ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id,
3380                                                     false);
3381                         goto end;
3382                 }
3383
3384                 /*
3385                  * It is possible that the 'sta' parameter is NULL, and thus
3386                  * there is a need to retrieve  the sta from the local station
3387                  * table.
3388                  */
3389                 if (!sta) {
3390                         sta = rcu_dereference_protected(
3391                                 mvm->fw_id_to_mac_id[sta_id],
3392                                 lockdep_is_held(&mvm->mutex));
3393                         if (IS_ERR_OR_NULL(sta)) {
3394                                 IWL_ERR(mvm, "Invalid station id\n");
3395                                 return -EINVAL;
3396                         }
3397                 }
3398
3399                 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3400                         return -EINVAL;
3401         }
3402
3403         /* If the key_offset is not pre-assigned, we need to find a
3404          * new offset to use.  In normal cases, the offset is not
3405          * pre-assigned, but during HW_RESTART we want to reuse the
3406          * same indices, so we pass them when this function is called.
3407          *
3408          * In D3 entry, we need to hardcoded the indices (because the
3409          * firmware hardcodes the PTK offset to 0).  In this case, we
3410          * need to make sure we don't overwrite the hw_key_idx in the
3411          * keyconf structure, because otherwise we cannot configure
3412          * the original ones back when resuming.
3413          */
3414         if (key_offset == STA_KEY_IDX_INVALID) {
3415                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3416                 if (key_offset == STA_KEY_IDX_INVALID)
3417                         return -ENOSPC;
3418                 keyconf->hw_key_idx = key_offset;
3419         }
3420
3421         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3422         if (ret)
3423                 goto end;
3424
3425         /*
3426          * For WEP, the same key is used for multicast and unicast. Upload it
3427          * again, using the same key offset, and now pointing the other one
3428          * to the same key slot (offset).
3429          * If this fails, remove the original as well.
3430          */
3431         if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3432              keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3433             sta) {
3434                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3435                                             key_offset, !mcast);
3436                 if (ret) {
3437                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3438                         goto end;
3439                 }
3440         }
3441
3442         __set_bit(key_offset, mvm->fw_key_table);
3443
3444 end:
3445         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3446                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3447                       sta ? sta->addr : zero_addr, ret);
3448         return ret;
3449 }
3450
3451 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3452                            struct ieee80211_vif *vif,
3453                            struct ieee80211_sta *sta,
3454                            struct ieee80211_key_conf *keyconf)
3455 {
3456         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3457         struct iwl_mvm_sta *mvm_sta;
3458         u8 sta_id = IWL_MVM_INVALID_STA;
3459         int ret, i;
3460
3461         lockdep_assert_held(&mvm->mutex);
3462
3463         /* Get the station from the mvm local station table */
3464         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3465         if (mvm_sta)
3466                 sta_id = mvm_sta->sta_id;
3467         else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3468                 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3469
3470
3471         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3472                       keyconf->keyidx, sta_id);
3473
3474         if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3475                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3476                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3477                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3478
3479         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3480                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3481                         keyconf->hw_key_idx);
3482                 return -ENOENT;
3483         }
3484
3485         /* track which key was deleted last */
3486         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3487                 if (mvm->fw_key_deleted[i] < U8_MAX)
3488                         mvm->fw_key_deleted[i]++;
3489         }
3490         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3491
3492         if (sta && !mvm_sta) {
3493                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3494                 return 0;
3495         }
3496
3497         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3498         if (ret)
3499                 return ret;
3500
3501         /* delete WEP key twice to get rid of (now useless) offset */
3502         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3503             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3504                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3505
3506         return ret;
3507 }
3508
3509 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3510                              struct ieee80211_vif *vif,
3511                              struct ieee80211_key_conf *keyconf,
3512                              struct ieee80211_sta *sta, u32 iv32,
3513                              u16 *phase1key)
3514 {
3515         struct iwl_mvm_sta *mvm_sta;
3516         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3517
3518         rcu_read_lock();
3519
3520         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3521         if (WARN_ON_ONCE(!mvm_sta))
3522                 goto unlock;
3523         iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3524                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3525
3526  unlock:
3527         rcu_read_unlock();
3528 }
3529
3530 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3531                                 struct ieee80211_sta *sta)
3532 {
3533         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3534         struct iwl_mvm_add_sta_cmd cmd = {
3535                 .add_modify = STA_MODE_MODIFY,
3536                 .sta_id = mvmsta->sta_id,
3537                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3538                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3539         };
3540         int ret;
3541
3542         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3543                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3544         if (ret)
3545                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3546 }
3547
3548 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3549                                        struct ieee80211_sta *sta,
3550                                        enum ieee80211_frame_release_type reason,
3551                                        u16 cnt, u16 tids, bool more_data,
3552                                        bool single_sta_queue)
3553 {
3554         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3555         struct iwl_mvm_add_sta_cmd cmd = {
3556                 .add_modify = STA_MODE_MODIFY,
3557                 .sta_id = mvmsta->sta_id,
3558                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3559                 .sleep_tx_count = cpu_to_le16(cnt),
3560                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3561         };
3562         int tid, ret;
3563         unsigned long _tids = tids;
3564
3565         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3566          * Note that this field is reserved and unused by firmware not
3567          * supporting GO uAPSD, so it's safe to always do this.
3568          */
3569         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3570                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3571
3572         /* If we're releasing frames from aggregation or dqa queues then check
3573          * if all the queues that we're releasing frames from, combined, have:
3574          *  - more frames than the service period, in which case more_data
3575          *    needs to be set
3576          *  - fewer than 'cnt' frames, in which case we need to adjust the
3577          *    firmware command (but do that unconditionally)
3578          */
3579         if (single_sta_queue) {
3580                 int remaining = cnt;
3581                 int sleep_tx_count;
3582
3583                 spin_lock_bh(&mvmsta->lock);
3584                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3585                         struct iwl_mvm_tid_data *tid_data;
3586                         u16 n_queued;
3587
3588                         tid_data = &mvmsta->tid_data[tid];
3589                         if (WARN(!iwl_mvm_is_dqa_supported(mvm) &&
3590                                  tid_data->state != IWL_AGG_ON &&
3591                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3592                                  "TID %d state is %d\n",
3593                                  tid, tid_data->state)) {
3594                                 spin_unlock_bh(&mvmsta->lock);
3595                                 ieee80211_sta_eosp(sta);
3596                                 return;
3597                         }
3598
3599                         n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3600                         if (n_queued > remaining) {
3601                                 more_data = true;
3602                                 remaining = 0;
3603                                 break;
3604                         }
3605                         remaining -= n_queued;
3606                 }
3607                 sleep_tx_count = cnt - remaining;
3608                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3609                         mvmsta->sleep_tx_count = sleep_tx_count;
3610                 spin_unlock_bh(&mvmsta->lock);
3611
3612                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3613                 if (WARN_ON(cnt - remaining == 0)) {
3614                         ieee80211_sta_eosp(sta);
3615                         return;
3616                 }
3617         }
3618
3619         /* Note: this is ignored by firmware not supporting GO uAPSD */
3620         if (more_data)
3621                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3622
3623         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3624                 mvmsta->next_status_eosp = true;
3625                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3626         } else {
3627                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3628         }
3629
3630         /* block the Tx queues until the FW updated the sleep Tx count */
3631         iwl_trans_block_txq_ptrs(mvm->trans, true);
3632
3633         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3634                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3635                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3636         if (ret)
3637                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3638 }
3639
3640 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3641                            struct iwl_rx_cmd_buffer *rxb)
3642 {
3643         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3644         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3645         struct ieee80211_sta *sta;
3646         u32 sta_id = le32_to_cpu(notif->sta_id);
3647
3648         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3649                 return;
3650
3651         rcu_read_lock();
3652         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3653         if (!IS_ERR_OR_NULL(sta))
3654                 ieee80211_sta_eosp(sta);
3655         rcu_read_unlock();
3656 }
3657
3658 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3659                                    struct iwl_mvm_sta *mvmsta, bool disable)
3660 {
3661         struct iwl_mvm_add_sta_cmd cmd = {
3662                 .add_modify = STA_MODE_MODIFY,
3663                 .sta_id = mvmsta->sta_id,
3664                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3665                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3666                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3667         };
3668         int ret;
3669
3670         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3671                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3672         if (ret)
3673                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3674 }
3675
3676 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3677                                       struct ieee80211_sta *sta,
3678                                       bool disable)
3679 {
3680         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3681
3682         spin_lock_bh(&mvm_sta->lock);
3683
3684         if (mvm_sta->disable_tx == disable) {
3685                 spin_unlock_bh(&mvm_sta->lock);
3686                 return;
3687         }
3688
3689         mvm_sta->disable_tx = disable;
3690
3691         /*
3692          * Tell mac80211 to start/stop queuing tx for this station,
3693          * but don't stop queuing if there are still pending frames
3694          * for this station.
3695          */
3696         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3697                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3698
3699         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3700
3701         spin_unlock_bh(&mvm_sta->lock);
3702 }
3703
3704 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3705                                               struct iwl_mvm_vif *mvmvif,
3706                                               struct iwl_mvm_int_sta *sta,
3707                                               bool disable)
3708 {
3709         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3710         struct iwl_mvm_add_sta_cmd cmd = {
3711                 .add_modify = STA_MODE_MODIFY,
3712                 .sta_id = sta->sta_id,
3713                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3714                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3715                 .mac_id_n_color = cpu_to_le32(id),
3716         };
3717         int ret;
3718
3719         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3720                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3721         if (ret)
3722                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3723 }
3724
3725 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3726                                        struct iwl_mvm_vif *mvmvif,
3727                                        bool disable)
3728 {
3729         struct ieee80211_sta *sta;
3730         struct iwl_mvm_sta *mvm_sta;
3731         int i;
3732
3733         lockdep_assert_held(&mvm->mutex);
3734
3735         /* Block/unblock all the stations of the given mvmvif */
3736         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3737                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3738                                                 lockdep_is_held(&mvm->mutex));
3739                 if (IS_ERR_OR_NULL(sta))
3740                         continue;
3741
3742                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3743                 if (mvm_sta->mac_id_n_color !=
3744                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3745                         continue;
3746
3747                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3748         }
3749
3750         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3751                 return;
3752
3753         /* Need to block/unblock also multicast station */
3754         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3755                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3756                                                   &mvmvif->mcast_sta, disable);
3757
3758         /*
3759          * Only unblock the broadcast station (FW blocks it for immediate
3760          * quiet, not the driver)
3761          */
3762         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3763                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3764                                                   &mvmvif->bcast_sta, disable);
3765 }
3766
3767 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3768 {
3769         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3770         struct iwl_mvm_sta *mvmsta;
3771
3772         rcu_read_lock();
3773
3774         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3775
3776         if (!WARN_ON(!mvmsta))
3777                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3778
3779         rcu_read_unlock();
3780 }
3781
3782 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3783 {
3784         u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3785
3786         /*
3787          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
3788          * to align the wrap around of ssn so we compare relevant values.
3789          */
3790         if (mvm->trans->cfg->gen2)
3791                 sn &= 0xff;
3792
3793         return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3794 }