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

   1 /******************************************************************************
   2  *
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   8  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  *
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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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  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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  41  * modification, are permitted provided that the following conditions
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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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  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  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                                                  STA_FLG_RTS_MIMO_PROT),
 126                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 127         };
 128         int ret;
 129         u32 status;
 130         u32 agg_size = 0, mpdu_dens = 0;
 131
 132         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
 133                 add_sta_cmd.station_type = mvm_sta->sta_type;
 134
 135         if (!update || (flags & STA_MODIFY_QUEUES)) {
 136                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 137
 138                 if (!iwl_mvm_has_new_tx_api(mvm)) {
 139                         add_sta_cmd.tfd_queue_msk =
 140                                 cpu_to_le32(mvm_sta->tfd_queue_msk);
 141
 142                         if (flags & STA_MODIFY_QUEUES)
 143                                 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 144                 } else {
 145                         WARN_ON(flags & STA_MODIFY_QUEUES);
 146                 }
 147         }
 148
 149         switch (sta->bandwidth) {
 150         case IEEE80211_STA_RX_BW_160:
 151                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 152                 /* fall through */
 153         case IEEE80211_STA_RX_BW_80:
 154                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 155                 /* fall through */
 156         case IEEE80211_STA_RX_BW_40:
 157                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 158                 /* fall through */
 159         case IEEE80211_STA_RX_BW_20:
 160                 if (sta->ht_cap.ht_supported)
 161                         add_sta_cmd.station_flags |=
 162                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 163                 break;
 164         }
 165
 166         switch (sta->rx_nss) {
 167         case 1:
 168                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 169                 break;
 170         case 2:
 171                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 172                 break;
 173         case 3 ... 8:
 174                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 175                 break;
 176         }
 177
 178         switch (sta->smps_mode) {
 179         case IEEE80211_SMPS_AUTOMATIC:
 180         case IEEE80211_SMPS_NUM_MODES:
 181                 WARN_ON(1);
 182                 break;
 183         case IEEE80211_SMPS_STATIC:
 184                 /* override NSS */
 185                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 186                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 187                 break;
 188         case IEEE80211_SMPS_DYNAMIC:
 189                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 190                 break;
 191         case IEEE80211_SMPS_OFF:
 192                 /* nothing */
 193                 break;
 194         }
 195
 196         if (sta->ht_cap.ht_supported) {
 197                 add_sta_cmd.station_flags_msk |=
 198                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 199                                     STA_FLG_AGG_MPDU_DENS_MSK);
 200
 201                 mpdu_dens = sta->ht_cap.ampdu_density;
 202         }
 203
 204         if (sta->vht_cap.vht_supported) {
 205                 agg_size = sta->vht_cap.cap &
 206                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 207                 agg_size >>=
 208                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 209         } else if (sta->ht_cap.ht_supported) {
 210                 agg_size = sta->ht_cap.ampdu_factor;
 211         }
 212
 213         add_sta_cmd.station_flags |=
 214                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 215         add_sta_cmd.station_flags |=
 216                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 217         if (mvm_sta->associated)
 218                 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 219
 220         if (sta->wme) {
 221                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 222
 223                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 224                         add_sta_cmd.uapsd_acs |= BIT(AC_BK);
 225                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 226                         add_sta_cmd.uapsd_acs |= BIT(AC_BE);
 227                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 228                         add_sta_cmd.uapsd_acs |= BIT(AC_VI);
 229                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 230                         add_sta_cmd.uapsd_acs |= BIT(AC_VO);
 231                 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
 232                 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
 233         }
 234
 235         status = ADD_STA_SUCCESS;
 236         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 237                                           iwl_mvm_add_sta_cmd_size(mvm),
 238                                           &add_sta_cmd, &status);
 239         if (ret)
 240                 return ret;
 241
 242         switch (status & IWL_ADD_STA_STATUS_MASK) {
 243         case ADD_STA_SUCCESS:
 244                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 245                 break;
 246         default:
 247                 ret = -EIO;
 248                 IWL_ERR(mvm, "ADD_STA failed\n");
 249                 break;
 250         }
 251
 252         return ret;
 253 }
 254
 255 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
 256 {
 257         struct iwl_mvm_baid_data *data =
 258                 from_timer(data, t, session_timer);
 259         struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
 260         struct iwl_mvm_baid_data *ba_data;
 261         struct ieee80211_sta *sta;
 262         struct iwl_mvm_sta *mvm_sta;
 263         unsigned long timeout;
 264
 265         rcu_read_lock();
 266
 267         ba_data = rcu_dereference(*rcu_ptr);
 268
 269         if (WARN_ON(!ba_data))
 270                 goto unlock;
 271
 272         if (!ba_data->timeout)
 273                 goto unlock;
 274
 275         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 276         if (time_is_after_jiffies(timeout)) {
 277                 mod_timer(&ba_data->session_timer, timeout);
 278                 goto unlock;
 279         }
 280
 281         /* Timer expired */
 282         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 283
 284         /*
 285          * sta should be valid unless the following happens:
 286          * The firmware asserts which triggers a reconfig flow, but
 287          * the reconfig fails before we set the pointer to sta into
 288          * the fw_id_to_mac_id pointer table. Mac80211 can't stop
 289          * A-MDPU and hence the timer continues to run. Then, the
 290          * timer expires and sta is NULL.
 291          */
 292         if (!sta)
 293                 goto unlock;
 294
 295         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 296         ieee80211_rx_ba_timer_expired(mvm_sta->vif,
 297                                       sta->addr, ba_data->tid);
 298 unlock:
 299         rcu_read_unlock();
 300 }
 301
 302 /* Disable aggregations for a bitmap of TIDs for a given station */
 303 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 304                                         unsigned long disable_agg_tids,
 305                                         bool remove_queue)
 306 {
 307         struct iwl_mvm_add_sta_cmd cmd = {};
 308         struct ieee80211_sta *sta;
 309         struct iwl_mvm_sta *mvmsta;
 310         u32 status;
 311         u8 sta_id;
 312         int ret;
 313
 314         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 315                 return -EINVAL;
 316
 317         spin_lock_bh(&mvm->queue_info_lock);
 318         sta_id = mvm->queue_info[queue].ra_sta_id;
 319         spin_unlock_bh(&mvm->queue_info_lock);
 320
 321         rcu_read_lock();
 322
 323         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 324
 325         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 326                 rcu_read_unlock();
 327                 return -EINVAL;
 328         }
 329
 330         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 331
 332         mvmsta->tid_disable_agg |= disable_agg_tids;
 333
 334         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 335         cmd.sta_id = mvmsta->sta_id;
 336         cmd.add_modify = STA_MODE_MODIFY;
 337         cmd.modify_mask = STA_MODIFY_QUEUES;
 338         if (disable_agg_tids)
 339                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 340         if (remove_queue)
 341                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 342         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 343         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 344
 345         rcu_read_unlock();
 346
 347         /* Notify FW of queue removal from the STA queues */
 348         status = ADD_STA_SUCCESS;
 349         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 350                                           iwl_mvm_add_sta_cmd_size(mvm),
 351                                           &cmd, &status);
 352
 353         return ret;
 354 }
 355
 356 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 357 {
 358         struct ieee80211_sta *sta;
 359         struct iwl_mvm_sta *mvmsta;
 360         unsigned long tid_bitmap;
 361         unsigned long agg_tids = 0;
 362         u8 sta_id;
 363         int tid;
 364
 365         lockdep_assert_held(&mvm->mutex);
 366
 367         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 368                 return -EINVAL;
 369
 370         spin_lock_bh(&mvm->queue_info_lock);
 371         sta_id = mvm->queue_info[queue].ra_sta_id;
 372         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 373         spin_unlock_bh(&mvm->queue_info_lock);
 374
 375         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 376                                         lockdep_is_held(&mvm->mutex));
 377
 378         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 379                 return -EINVAL;
 380
 381         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 382
 383         spin_lock_bh(&mvmsta->lock);
 384         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 385                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 386                         agg_tids |= BIT(tid);
 387         }
 388         spin_unlock_bh(&mvmsta->lock);
 389
 390         return agg_tids;
 391 }
 392
 393 /*
 394  * Remove a queue from a station's resources.
 395  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 396  * doesn't disable the queue
 397  */
 398 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 399 {
 400         struct ieee80211_sta *sta;
 401         struct iwl_mvm_sta *mvmsta;
 402         unsigned long tid_bitmap;
 403         unsigned long disable_agg_tids = 0;
 404         u8 sta_id;
 405         int tid;
 406
 407         lockdep_assert_held(&mvm->mutex);
 408
 409         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 410                 return -EINVAL;
 411
 412         spin_lock_bh(&mvm->queue_info_lock);
 413         sta_id = mvm->queue_info[queue].ra_sta_id;
 414         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 415         spin_unlock_bh(&mvm->queue_info_lock);
 416
 417         rcu_read_lock();
 418
 419         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 420
 421         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 422                 rcu_read_unlock();
 423                 return 0;
 424         }
 425
 426         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 427
 428         spin_lock_bh(&mvmsta->lock);
 429         /* Unmap MAC queues and TIDs from this queue */
 430         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 431                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 432                         disable_agg_tids |= BIT(tid);
 433                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
 434         }
 435
 436         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 437         spin_unlock_bh(&mvmsta->lock);
 438
 439         rcu_read_unlock();
 440
 441         return disable_agg_tids;
 442 }
 443
 444 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
 445                                        bool same_sta)
 446 {
 447         struct iwl_mvm_sta *mvmsta;
 448         u8 txq_curr_ac, sta_id, tid;
 449         unsigned long disable_agg_tids = 0;
 450         int ret;
 451
 452         lockdep_assert_held(&mvm->mutex);
 453
 454         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 455                 return -EINVAL;
 456
 457         spin_lock_bh(&mvm->queue_info_lock);
 458         txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
 459         sta_id = mvm->queue_info[queue].ra_sta_id;
 460         tid = mvm->queue_info[queue].txq_tid;
 461         spin_unlock_bh(&mvm->queue_info_lock);
 462
 463         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 464         if (WARN_ON(!mvmsta))
 465                 return -EINVAL;
 466
 467         disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 468         /* Disable the queue */
 469         if (disable_agg_tids)
 470                 iwl_mvm_invalidate_sta_queue(mvm, queue,
 471                                              disable_agg_tids, false);
 472
 473         ret = iwl_mvm_disable_txq(mvm, queue,
 474                                   mvmsta->vif->hw_queue[txq_curr_ac],
 475                                   tid, 0);
 476         if (ret) {
 477                 /* Re-mark the inactive queue as inactive */
 478                 spin_lock_bh(&mvm->queue_info_lock);
 479                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
 480                 spin_unlock_bh(&mvm->queue_info_lock);
 481                 IWL_ERR(mvm,
 482                         "Failed to free inactive queue %d (ret=%d)\n",
 483                         queue, ret);
 484
 485                 return ret;
 486         }
 487
 488         /* If TXQ is allocated to another STA, update removal in FW */
 489         if (!same_sta)
 490                 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 491
 492         return 0;
 493 }
 494
 495 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 496                                     unsigned long tfd_queue_mask, u8 ac)
 497 {
 498         int queue = 0;
 499         u8 ac_to_queue[IEEE80211_NUM_ACS];
 500         int i;
 501
 502         lockdep_assert_held(&mvm->queue_info_lock);
 503         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 504                 return -EINVAL;
 505
 506         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 507
 508         /* See what ACs the existing queues for this STA have */
 509         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 510                 /* Only DATA queues can be shared */
 511                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 512                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 513                         continue;
 514
 515                 /* Don't try and take queues being reconfigured */
 516                 if (mvm->queue_info[queue].status ==
 517                     IWL_MVM_QUEUE_RECONFIGURING)
 518                         continue;
 519
 520                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 521         }
 522
 523         /*
 524          * The queue to share is chosen only from DATA queues as follows (in
 525          * descending priority):
 526          * 1. An AC_BE queue
 527          * 2. Same AC queue
 528          * 3. Highest AC queue that is lower than new AC
 529          * 4. Any existing AC (there always is at least 1 DATA queue)
 530          */
 531
 532         /* Priority 1: An AC_BE queue */
 533         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 534                 queue = ac_to_queue[IEEE80211_AC_BE];
 535         /* Priority 2: Same AC queue */
 536         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 537                 queue = ac_to_queue[ac];
 538         /* Priority 3a: If new AC is VO and VI exists - use VI */
 539         else if (ac == IEEE80211_AC_VO &&
 540                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 541                 queue = ac_to_queue[IEEE80211_AC_VI];
 542         /* Priority 3b: No BE so only AC less than the new one is BK */
 543         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 544                 queue = ac_to_queue[IEEE80211_AC_BK];
 545         /* Priority 4a: No BE nor BK - use VI if exists */
 546         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 547                 queue = ac_to_queue[IEEE80211_AC_VI];
 548         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 549         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 550                 queue = ac_to_queue[IEEE80211_AC_VO];
 551
 552         /* Make sure queue found (or not) is legal */
 553         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 554             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 555             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 556                 IWL_ERR(mvm, "No DATA queues available to share\n");
 557                 return -ENOSPC;
 558         }
 559
 560         /* Make sure the queue isn't in the middle of being reconfigured */
 561         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
 562                 IWL_ERR(mvm,
 563                         "TXQ %d is in the middle of re-config - try again\n",
 564                         queue);
 565                 return -EBUSY;
 566         }
 567
 568         return queue;
 569 }
 570
 571 /*
 572  * If a given queue has a higher AC than the TID stream that is being compared
 573  * to, the queue needs to be redirected to the lower AC. This function does that
 574  * in such a case, otherwise - if no redirection required - it does nothing,
 575  * unless the %force param is true.
 576  */
 577 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
 578                                int ac, int ssn, unsigned int wdg_timeout,
 579                                bool force)
 580 {
 581         struct iwl_scd_txq_cfg_cmd cmd = {
 582                 .scd_queue = queue,
 583                 .action = SCD_CFG_DISABLE_QUEUE,
 584         };
 585         bool shared_queue;
 586         unsigned long mq;
 587         int ret;
 588
 589         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 590                 return -EINVAL;
 591
 592         /*
 593          * If the AC is lower than current one - FIFO needs to be redirected to
 594          * the lowest one of the streams in the queue. Check if this is needed
 595          * here.
 596          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 597          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 598          * we need to check if the numerical value of X is LARGER than of Y.
 599          */
 600         spin_lock_bh(&mvm->queue_info_lock);
 601         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 602                 spin_unlock_bh(&mvm->queue_info_lock);
 603
 604                 IWL_DEBUG_TX_QUEUES(mvm,
 605                                     "No redirection needed on TXQ #%d\n",
 606                                     queue);
 607                 return 0;
 608         }
 609
 610         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 611         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 612         cmd.tid = mvm->queue_info[queue].txq_tid;
 613         mq = mvm->hw_queue_to_mac80211[queue];
 614         shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
 615         spin_unlock_bh(&mvm->queue_info_lock);
 616
 617         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 618                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 619
 620         /* Stop MAC queues and wait for this queue to empty */
 621         iwl_mvm_stop_mac_queues(mvm, mq);
 622         ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
 623         if (ret) {
 624                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 625                         queue);
 626                 ret = -EIO;
 627                 goto out;
 628         }
 629
 630         /* Before redirecting the queue we need to de-activate it */
 631         iwl_trans_txq_disable(mvm->trans, queue, false);
 632         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 633         if (ret)
 634                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 635                         ret);
 636
 637         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 638         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 639
 640         /* Update the TID "owner" of the queue */
 641         spin_lock_bh(&mvm->queue_info_lock);
 642         mvm->queue_info[queue].txq_tid = tid;
 643         spin_unlock_bh(&mvm->queue_info_lock);
 644
 645         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 646
 647         /* Redirect to lower AC */
 648         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 649                              cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
 650
 651         /* Update AC marking of the queue */
 652         spin_lock_bh(&mvm->queue_info_lock);
 653         mvm->queue_info[queue].mac80211_ac = ac;
 654         spin_unlock_bh(&mvm->queue_info_lock);
 655
 656         /*
 657          * Mark queue as shared in transport if shared
 658          * Note this has to be done after queue enablement because enablement
 659          * can also set this value, and there is no indication there to shared
 660          * queues
 661          */
 662         if (shared_queue)
 663                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 664
 665 out:
 666         /* Continue using the MAC queues */
 667         iwl_mvm_start_mac_queues(mvm, mq);
 668
 669         return ret;
 670 }
 671
 672 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
 673                                         struct ieee80211_sta *sta, u8 ac,
 674                                         int tid)
 675 {
 676         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 677         unsigned int wdg_timeout =
 678                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 679         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 680         int queue = -1;
 681
 682         lockdep_assert_held(&mvm->mutex);
 683
 684         IWL_DEBUG_TX_QUEUES(mvm,
 685                             "Allocating queue for sta %d on tid %d\n",
 686                             mvmsta->sta_id, tid);
 687         queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
 688                                         wdg_timeout);
 689         if (queue < 0)
 690                 return queue;
 691
 692         IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
 693
 694         spin_lock_bh(&mvmsta->lock);
 695         mvmsta->tid_data[tid].txq_id = queue;
 696         mvmsta->tid_data[tid].is_tid_active = true;
 697         spin_unlock_bh(&mvmsta->lock);
 698
 699         return 0;
 700 }
 701
 702 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
 703                                    struct ieee80211_sta *sta, u8 ac, int tid,
 704                                    struct ieee80211_hdr *hdr)
 705 {
 706         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 707         struct iwl_trans_txq_scd_cfg cfg = {
 708                 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
 709                 .sta_id = mvmsta->sta_id,
 710                 .tid = tid,
 711                 .frame_limit = IWL_FRAME_LIMIT,
 712         };
 713         unsigned int wdg_timeout =
 714                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 715         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 716         int queue = -1;
 717         bool using_inactive_queue = false, same_sta = false;
 718         unsigned long disable_agg_tids = 0;
 719         enum iwl_mvm_agg_state queue_state;
 720         bool shared_queue = false, inc_ssn;
 721         int ssn;
 722         unsigned long tfd_queue_mask;
 723         int ret;
 724
 725         lockdep_assert_held(&mvm->mutex);
 726
 727         if (iwl_mvm_has_new_tx_api(mvm))
 728                 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
 729
 730         spin_lock_bh(&mvmsta->lock);
 731         tfd_queue_mask = mvmsta->tfd_queue_msk;
 732         spin_unlock_bh(&mvmsta->lock);
 733
 734         spin_lock_bh(&mvm->queue_info_lock);
 735
 736         /*
 737          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
 738          * exists
 739          */
 740         if (!ieee80211_is_data_qos(hdr->frame_control) ||
 741             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 742                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 743                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
 744                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
 745                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
 746                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
 747                                             queue);
 748
 749                 /* If no such queue is found, we'll use a DATA queue instead */
 750         }
 751
 752         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
 753             (mvm->queue_info[mvmsta->reserved_queue].status ==
 754              IWL_MVM_QUEUE_RESERVED ||
 755              mvm->queue_info[mvmsta->reserved_queue].status ==
 756              IWL_MVM_QUEUE_INACTIVE)) {
 757                 queue = mvmsta->reserved_queue;
 758                 mvm->queue_info[queue].reserved = true;
 759                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
 760         }
 761
 762         if (queue < 0)
 763                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 764                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
 765                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 766
 767         /*
 768          * Check if this queue is already allocated but inactive.
 769          * In such a case, we'll need to first free this queue before enabling
 770          * it again, so we'll mark it as reserved to make sure no new traffic
 771          * arrives on it
 772          */
 773         if (queue > 0 &&
 774             mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
 775                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
 776                 using_inactive_queue = true;
 777                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
 778                 IWL_DEBUG_TX_QUEUES(mvm,
 779                                     "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
 780                                     queue, mvmsta->sta_id, tid);
 781         }
 782
 783         /* No free queue - we'll have to share */
 784         if (queue <= 0) {
 785                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
 786                 if (queue > 0) {
 787                         shared_queue = true;
 788                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
 789                 }
 790         }
 791
 792         /*
 793          * Mark TXQ as ready, even though it hasn't been fully configured yet,
 794          * to make sure no one else takes it.
 795          * This will allow avoiding re-acquiring the lock at the end of the
 796          * configuration. On error we'll mark it back as free.
 797          */
 798         if ((queue > 0) && !shared_queue)
 799                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 800
 801         spin_unlock_bh(&mvm->queue_info_lock);
 802
 803         /* This shouldn't happen - out of queues */
 804         if (WARN_ON(queue <= 0)) {
 805                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
 806                         tid, cfg.sta_id);
 807                 return queue;
 808         }
 809
 810         /*
 811          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
 812          * but for configuring the SCD to send A-MPDUs we need to mark the queue
 813          * as aggregatable.
 814          * Mark all DATA queues as allowing to be aggregated at some point
 815          */
 816         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 817                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
 818
 819         /*
 820          * If this queue was previously inactive (idle) - we need to free it
 821          * first
 822          */
 823         if (using_inactive_queue) {
 824                 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
 825                 if (ret)
 826                         return ret;
 827         }
 828
 829         IWL_DEBUG_TX_QUEUES(mvm,
 830                             "Allocating %squeue #%d to sta %d on tid %d\n",
 831                             shared_queue ? "shared " : "", queue,
 832                             mvmsta->sta_id, tid);
 833
 834         if (shared_queue) {
 835                 /* Disable any open aggs on this queue */
 836                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
 837
 838                 if (disable_agg_tids) {
 839                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
 840                                             queue);
 841                         iwl_mvm_invalidate_sta_queue(mvm, queue,
 842                                                      disable_agg_tids, false);
 843                 }
 844         }
 845
 846         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 847         inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
 848                                      ssn, &cfg, wdg_timeout);
 849         if (inc_ssn) {
 850                 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
 851                 le16_add_cpu(&hdr->seq_ctrl, 0x10);
 852         }
 853
 854         /*
 855          * Mark queue as shared in transport if shared
 856          * Note this has to be done after queue enablement because enablement
 857          * can also set this value, and there is no indication there to shared
 858          * queues
 859          */
 860         if (shared_queue)
 861                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 862
 863         spin_lock_bh(&mvmsta->lock);
 864         /*
 865          * This looks racy, but it is not. We have only one packet for
 866          * this ra/tid in our Tx path since we stop the Qdisc when we
 867          * need to allocate a new TFD queue.
 868          */
 869         if (inc_ssn)
 870                 mvmsta->tid_data[tid].seq_number += 0x10;
 871         mvmsta->tid_data[tid].txq_id = queue;
 872         mvmsta->tid_data[tid].is_tid_active = true;
 873         mvmsta->tfd_queue_msk |= BIT(queue);
 874         queue_state = mvmsta->tid_data[tid].state;
 875
 876         if (mvmsta->reserved_queue == queue)
 877                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
 878         spin_unlock_bh(&mvmsta->lock);
 879
 880         if (!shared_queue) {
 881                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
 882                 if (ret)
 883                         goto out_err;
 884
 885                 /* If we need to re-enable aggregations... */
 886                 if (queue_state == IWL_AGG_ON) {
 887                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
 888                         if (ret)
 889                                 goto out_err;
 890                 }
 891         } else {
 892                 /* Redirect queue, if needed */
 893                 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
 894                                                  wdg_timeout, false);
 895                 if (ret)
 896                         goto out_err;
 897         }
 898
 899         return 0;
 900
 901 out_err:
 902         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
 903
 904         return ret;
 905 }
 906
 907 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
 908 {
 909         struct iwl_scd_txq_cfg_cmd cmd = {
 910                 .scd_queue = queue,
 911                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 912         };
 913         int tid;
 914         unsigned long tid_bitmap;
 915         int ret;
 916
 917         lockdep_assert_held(&mvm->mutex);
 918
 919         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 920                 return;
 921
 922         spin_lock_bh(&mvm->queue_info_lock);
 923         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 924         spin_unlock_bh(&mvm->queue_info_lock);
 925
 926         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 927                 return;
 928
 929         /* Find any TID for queue */
 930         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 931         cmd.tid = tid;
 932         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 933
 934         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 935         if (ret) {
 936                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 937                         queue, ret);
 938                 return;
 939         }
 940
 941         spin_lock_bh(&mvm->queue_info_lock);
 942         mvm->queue_info[queue].txq_tid = tid;
 943         spin_unlock_bh(&mvm->queue_info_lock);
 944         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 945                             queue, tid);
 946 }
 947
 948 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
 949 {
 950         struct ieee80211_sta *sta;
 951         struct iwl_mvm_sta *mvmsta;
 952         u8 sta_id;
 953         int tid = -1;
 954         unsigned long tid_bitmap;
 955         unsigned int wdg_timeout;
 956         int ssn;
 957         int ret = true;
 958
 959         /* queue sharing is disabled on new TX path */
 960         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 961                 return;
 962
 963         lockdep_assert_held(&mvm->mutex);
 964
 965         spin_lock_bh(&mvm->queue_info_lock);
 966         sta_id = mvm->queue_info[queue].ra_sta_id;
 967         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 968         spin_unlock_bh(&mvm->queue_info_lock);
 969
 970         /* Find TID for queue, and make sure it is the only one on the queue */
 971         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 972         if (tid_bitmap != BIT(tid)) {
 973                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
 974                         queue, tid_bitmap);
 975                 return;
 976         }
 977
 978         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
 979                             tid);
 980
 981         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 982                                         lockdep_is_held(&mvm->mutex));
 983
 984         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 985                 return;
 986
 987         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 988         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 989
 990         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
 991
 992         ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
 993                                          tid_to_mac80211_ac[tid], ssn,
 994                                          wdg_timeout, true);
 995         if (ret) {
 996                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
 997                 return;
 998         }
 999
1000         /* If aggs should be turned back on - do it */
1001         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1002                 struct iwl_mvm_add_sta_cmd cmd = {0};
1003
1004                 mvmsta->tid_disable_agg &= ~BIT(tid);
1005
1006                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1007                 cmd.sta_id = mvmsta->sta_id;
1008                 cmd.add_modify = STA_MODE_MODIFY;
1009                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1010                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1011                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1012
1013                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1014                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1015                 if (!ret) {
1016                         IWL_DEBUG_TX_QUEUES(mvm,
1017                                             "TXQ #%d is now aggregated again\n",
1018                                             queue);
1019
1020                         /* Mark queue intenally as aggregating again */
1021                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1022                 }
1023         }
1024
1025         spin_lock_bh(&mvm->queue_info_lock);
1026         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1027         spin_unlock_bh(&mvm->queue_info_lock);
1028 }
1029
1030 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1031 {
1032         if (tid == IWL_MAX_TID_COUNT)
1033                 return IEEE80211_AC_VO; /* MGMT */
1034
1035         return tid_to_mac80211_ac[tid];
1036 }
1037
1038 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1039                                        struct ieee80211_sta *sta, int tid)
1040 {
1041         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1042         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1043         struct sk_buff *skb;
1044         struct ieee80211_hdr *hdr;
1045         struct sk_buff_head deferred_tx;
1046         u8 mac_queue;
1047         bool no_queue = false; /* Marks if there is a problem with the queue */
1048         u8 ac;
1049
1050         lockdep_assert_held(&mvm->mutex);
1051
1052         skb = skb_peek(&tid_data->deferred_tx_frames);
1053         if (!skb)
1054                 return;
1055         hdr = (void *)skb->data;
1056
1057         ac = iwl_mvm_tid_to_ac_queue(tid);
1058         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1059
1060         if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1061             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1062                 IWL_ERR(mvm,
1063                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1064                         mvmsta->sta_id, tid);
1065
1066                 /*
1067                  * Mark queue as problematic so later the deferred traffic is
1068                  * freed, as we can do nothing with it
1069                  */
1070                 no_queue = true;
1071         }
1072
1073         __skb_queue_head_init(&deferred_tx);
1074
1075         /* Disable bottom-halves when entering TX path */
1076         local_bh_disable();
1077         spin_lock(&mvmsta->lock);
1078         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1079         mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1080         spin_unlock(&mvmsta->lock);
1081
1082         while ((skb = __skb_dequeue(&deferred_tx)))
1083                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1084                         ieee80211_free_txskb(mvm->hw, skb);
1085         local_bh_enable();
1086
1087         /* Wake queue */
1088         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1089 }
1090
1091 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1092 {
1093         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1094                                            add_stream_wk);
1095         struct ieee80211_sta *sta;
1096         struct iwl_mvm_sta *mvmsta;
1097         unsigned long deferred_tid_traffic;
1098         int queue, sta_id, tid;
1099
1100         /* Check inactivity of queues */
1101         iwl_mvm_inactivity_check(mvm);
1102
1103         mutex_lock(&mvm->mutex);
1104
1105         /* No queue reconfiguration in TVQM mode */
1106         if (iwl_mvm_has_new_tx_api(mvm))
1107                 goto alloc_queues;
1108
1109         /* Reconfigure queues requiring reconfiguation */
1110         for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1111                 bool reconfig;
1112                 bool change_owner;
1113
1114                 spin_lock_bh(&mvm->queue_info_lock);
1115                 reconfig = (mvm->queue_info[queue].status ==
1116                             IWL_MVM_QUEUE_RECONFIGURING);
1117
1118                 /*
1119                  * We need to take into account a situation in which a TXQ was
1120                  * allocated to TID x, and then turned shared by adding TIDs y
1121                  * and z. If TID x becomes inactive and is removed from the TXQ,
1122                  * ownership must be given to one of the remaining TIDs.
1123                  * This is mainly because if TID x continues - a new queue can't
1124                  * be allocated for it as long as it is an owner of another TXQ.
1125                  */
1126                 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1127                                  BIT(mvm->queue_info[queue].txq_tid)) &&
1128                                (mvm->queue_info[queue].status ==
1129                                 IWL_MVM_QUEUE_SHARED);
1130                 spin_unlock_bh(&mvm->queue_info_lock);
1131
1132                 if (reconfig)
1133                         iwl_mvm_unshare_queue(mvm, queue);
1134                 else if (change_owner)
1135                         iwl_mvm_change_queue_owner(mvm, queue);
1136         }
1137
1138 alloc_queues:
1139         /* Go over all stations with deferred traffic */
1140         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1141                          IWL_MVM_STATION_COUNT) {
1142                 clear_bit(sta_id, mvm->sta_deferred_frames);
1143                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1144                                                 lockdep_is_held(&mvm->mutex));
1145                 if (IS_ERR_OR_NULL(sta))
1146                         continue;
1147
1148                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1149                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1150
1151                 for_each_set_bit(tid, &deferred_tid_traffic,
1152                                  IWL_MAX_TID_COUNT + 1)
1153                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1154         }
1155
1156         mutex_unlock(&mvm->mutex);
1157 }
1158
1159 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1160                                       struct ieee80211_sta *sta,
1161                                       enum nl80211_iftype vif_type)
1162 {
1163         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1164         int queue;
1165         bool using_inactive_queue = false, same_sta = false;
1166
1167         /* queue reserving is disabled on new TX path */
1168         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1169                 return 0;
1170
1171         /*
1172          * Check for inactive queues, so we don't reach a situation where we
1173          * can't add a STA due to a shortage in queues that doesn't really exist
1174          */
1175         iwl_mvm_inactivity_check(mvm);
1176
1177         spin_lock_bh(&mvm->queue_info_lock);
1178
1179         /* Make sure we have free resources for this STA */
1180         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1181             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1182             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1183              IWL_MVM_QUEUE_FREE))
1184                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1185         else
1186                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1187                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1188                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1189         if (queue < 0) {
1190                 spin_unlock_bh(&mvm->queue_info_lock);
1191                 IWL_ERR(mvm, "No available queues for new station\n");
1192                 return -ENOSPC;
1193         } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1194                 /*
1195                  * If this queue is already allocated but inactive we'll need to
1196                  * first free this queue before enabling it again, we'll mark
1197                  * it as reserved to make sure no new traffic arrives on it
1198                  */
1199                 using_inactive_queue = true;
1200                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1201         }
1202         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1203
1204         spin_unlock_bh(&mvm->queue_info_lock);
1205
1206         mvmsta->reserved_queue = queue;
1207
1208         if (using_inactive_queue)
1209                 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1210
1211         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1212                             queue, mvmsta->sta_id);
1213
1214         return 0;
1215 }
1216
1217 /*
1218  * In DQA mode, after a HW restart the queues should be allocated as before, in
1219  * order to avoid race conditions when there are shared queues. This function
1220  * does the re-mapping and queue allocation.
1221  *
1222  * Note that re-enabling aggregations isn't done in this function.
1223  */
1224 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1225                                                  struct iwl_mvm_sta *mvm_sta)
1226 {
1227         unsigned int wdg_timeout =
1228                         iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1229         int i;
1230         struct iwl_trans_txq_scd_cfg cfg = {
1231                 .sta_id = mvm_sta->sta_id,
1232                 .frame_limit = IWL_FRAME_LIMIT,
1233         };
1234
1235         /* Make sure reserved queue is still marked as such (if allocated) */
1236         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1237                 mvm->queue_info[mvm_sta->reserved_queue].status =
1238                         IWL_MVM_QUEUE_RESERVED;
1239
1240         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1241                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1242                 int txq_id = tid_data->txq_id;
1243                 int ac;
1244                 u8 mac_queue;
1245
1246                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1247                         continue;
1248
1249                 skb_queue_head_init(&tid_data->deferred_tx_frames);
1250
1251                 ac = tid_to_mac80211_ac[i];
1252                 mac_queue = mvm_sta->vif->hw_queue[ac];
1253
1254                 if (iwl_mvm_has_new_tx_api(mvm)) {
1255                         IWL_DEBUG_TX_QUEUES(mvm,
1256                                             "Re-mapping sta %d tid %d\n",
1257                                             mvm_sta->sta_id, i);
1258                         txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1259                                                          mvm_sta->sta_id,
1260                                                          i, wdg_timeout);
1261                         tid_data->txq_id = txq_id;
1262
1263                         /*
1264                          * Since we don't set the seq number after reset, and HW
1265                          * sets it now, FW reset will cause the seq num to start
1266                          * at 0 again, so driver will need to update it
1267                          * internally as well, so it keeps in sync with real val
1268                          */
1269                         tid_data->seq_number = 0;
1270                 } else {
1271                         u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1272
1273                         cfg.tid = i;
1274                         cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1275                         cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1276                                          txq_id ==
1277                                          IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1278
1279                         IWL_DEBUG_TX_QUEUES(mvm,
1280                                             "Re-mapping sta %d tid %d to queue %d\n",
1281                                             mvm_sta->sta_id, i, txq_id);
1282
1283                         iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1284                                            wdg_timeout);
1285                         mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1286                 }
1287         }
1288 }
1289
1290 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1291                                       struct iwl_mvm_int_sta *sta,
1292                                       const u8 *addr,
1293                                       u16 mac_id, u16 color)
1294 {
1295         struct iwl_mvm_add_sta_cmd cmd;
1296         int ret;
1297         u32 status = ADD_STA_SUCCESS;
1298
1299         lockdep_assert_held(&mvm->mutex);
1300
1301         memset(&cmd, 0, sizeof(cmd));
1302         cmd.sta_id = sta->sta_id;
1303         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1304                                                              color));
1305         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1306                 cmd.station_type = sta->type;
1307
1308         if (!iwl_mvm_has_new_tx_api(mvm))
1309                 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1310         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1311
1312         if (addr)
1313                 memcpy(cmd.addr, addr, ETH_ALEN);
1314
1315         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1316                                           iwl_mvm_add_sta_cmd_size(mvm),
1317                                           &cmd, &status);
1318         if (ret)
1319                 return ret;
1320
1321         switch (status & IWL_ADD_STA_STATUS_MASK) {
1322         case ADD_STA_SUCCESS:
1323                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1324                 return 0;
1325         default:
1326                 ret = -EIO;
1327                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1328                         status);
1329                 break;
1330         }
1331         return ret;
1332 }
1333
1334 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1335                     struct ieee80211_vif *vif,
1336                     struct ieee80211_sta *sta)
1337 {
1338         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1339         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1340         struct iwl_mvm_rxq_dup_data *dup_data;
1341         int i, ret, sta_id;
1342         bool sta_update = false;
1343         unsigned int sta_flags = 0;
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         /* if this is a HW restart re-alloc existing queues */
1359         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1360                 struct iwl_mvm_int_sta tmp_sta = {
1361                         .sta_id = sta_id,
1362                         .type = mvm_sta->sta_type,
1363                 };
1364
1365                 /*
1366                  * First add an empty station since allocating
1367                  * a queue requires a valid station
1368                  */
1369                 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1370                                                  mvmvif->id, mvmvif->color);
1371                 if (ret)
1372                         goto err;
1373
1374                 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1375                 sta_update = true;
1376                 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1377                 goto update_fw;
1378         }
1379
1380         mvm_sta->sta_id = sta_id;
1381         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1382                                                       mvmvif->color);
1383         mvm_sta->vif = vif;
1384         if (!mvm->trans->cfg->gen2)
1385                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1386         else
1387                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1388         mvm_sta->tx_protection = 0;
1389         mvm_sta->tt_tx_protection = false;
1390         mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1391
1392         /* HW restart, don't assume the memory has been zeroed */
1393         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1394         mvm_sta->tfd_queue_msk = 0;
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                 /*
1403                  * Mark all queues for this STA as unallocated and defer TX
1404                  * frames until the queue is allocated
1405                  */
1406                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1407                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1408         }
1409         mvm_sta->deferred_traffic_tid_map = 0;
1410         mvm_sta->agg_tids = 0;
1411
1412         if (iwl_mvm_has_new_rx_api(mvm) &&
1413             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1414                 int q;
1415
1416                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1417                                    sizeof(*dup_data), GFP_KERNEL);
1418                 if (!dup_data)
1419                         return -ENOMEM;
1420                 /*
1421                  * Initialize all the last_seq values to 0xffff which can never
1422                  * compare equal to the frame's seq_ctrl in the check in
1423                  * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1424                  * number and fragmented packets don't reach that function.
1425                  *
1426                  * This thus allows receiving a packet with seqno 0 and the
1427                  * retry bit set as the very first packet on a new TID.
1428                  */
1429                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1430                         memset(dup_data[q].last_seq, 0xff,
1431                                sizeof(dup_data[q].last_seq));
1432                 mvm_sta->dup_data = dup_data;
1433         }
1434
1435         if (!iwl_mvm_has_new_tx_api(mvm)) {
1436                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1437                                                  ieee80211_vif_type_p2p(vif));
1438                 if (ret)
1439                         goto err;
1440         }
1441
1442 update_fw:
1443         ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1444         if (ret)
1445                 goto err;
1446
1447         if (vif->type == NL80211_IFTYPE_STATION) {
1448                 if (!sta->tdls) {
1449                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1450                         mvmvif->ap_sta_id = sta_id;
1451                 } else {
1452                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1453                 }
1454         }
1455
1456         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1457
1458         return 0;
1459
1460 err:
1461         return ret;
1462 }
1463
1464 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1465                       bool drain)
1466 {
1467         struct iwl_mvm_add_sta_cmd cmd = {};
1468         int ret;
1469         u32 status;
1470
1471         lockdep_assert_held(&mvm->mutex);
1472
1473         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1474         cmd.sta_id = mvmsta->sta_id;
1475         cmd.add_modify = STA_MODE_MODIFY;
1476         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1477         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1478
1479         status = ADD_STA_SUCCESS;
1480         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1481                                           iwl_mvm_add_sta_cmd_size(mvm),
1482                                           &cmd, &status);
1483         if (ret)
1484                 return ret;
1485
1486         switch (status & IWL_ADD_STA_STATUS_MASK) {
1487         case ADD_STA_SUCCESS:
1488                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1489                                mvmsta->sta_id);
1490                 break;
1491         default:
1492                 ret = -EIO;
1493                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1494                         mvmsta->sta_id);
1495                 break;
1496         }
1497
1498         return ret;
1499 }
1500
1501 /*
1502  * Remove a station from the FW table. Before sending the command to remove
1503  * the station validate that the station is indeed known to the driver (sanity
1504  * only).
1505  */
1506 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1507 {
1508         struct ieee80211_sta *sta;
1509         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1510                 .sta_id = sta_id,
1511         };
1512         int ret;
1513
1514         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1515                                         lockdep_is_held(&mvm->mutex));
1516
1517         /* Note: internal stations are marked as error values */
1518         if (!sta) {
1519                 IWL_ERR(mvm, "Invalid station id\n");
1520                 return -EINVAL;
1521         }
1522
1523         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1524                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1525         if (ret) {
1526                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1527                 return ret;
1528         }
1529
1530         return 0;
1531 }
1532
1533 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1534                                        struct ieee80211_vif *vif,
1535                                        struct iwl_mvm_sta *mvm_sta)
1536 {
1537         int ac;
1538         int i;
1539
1540         lockdep_assert_held(&mvm->mutex);
1541
1542         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1543                 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1544                         continue;
1545
1546                 ac = iwl_mvm_tid_to_ac_queue(i);
1547                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1548                                     vif->hw_queue[ac], i, 0);
1549                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1550         }
1551 }
1552
1553 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1554                                   struct iwl_mvm_sta *mvm_sta)
1555 {
1556         int i;
1557
1558         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1559                 u16 txq_id;
1560                 int ret;
1561
1562                 spin_lock_bh(&mvm_sta->lock);
1563                 txq_id = mvm_sta->tid_data[i].txq_id;
1564                 spin_unlock_bh(&mvm_sta->lock);
1565
1566                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1567                         continue;
1568
1569                 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1570                 if (ret)
1571                         return ret;
1572         }
1573
1574         return 0;
1575 }
1576
1577 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1578                    struct ieee80211_vif *vif,
1579                    struct ieee80211_sta *sta)
1580 {
1581         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1582         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1583         u8 sta_id = mvm_sta->sta_id;
1584         int ret;
1585
1586         lockdep_assert_held(&mvm->mutex);
1587
1588         if (iwl_mvm_has_new_rx_api(mvm))
1589                 kfree(mvm_sta->dup_data);
1590
1591         ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1592         if (ret)
1593                 return ret;
1594
1595         /* flush its queues here since we are freeing mvm_sta */
1596         ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1597         if (ret)
1598                 return ret;
1599         if (iwl_mvm_has_new_tx_api(mvm)) {
1600                 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1601         } else {
1602                 u32 q_mask = mvm_sta->tfd_queue_msk;
1603
1604                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1605                                                      q_mask);
1606         }
1607         if (ret)
1608                 return ret;
1609
1610         ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1611
1612         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1613
1614         /* If there is a TXQ still marked as reserved - free it */
1615         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1616                 u8 reserved_txq = mvm_sta->reserved_queue;
1617                 enum iwl_mvm_queue_status *status;
1618
1619                 /*
1620                  * If no traffic has gone through the reserved TXQ - it
1621                  * is still marked as IWL_MVM_QUEUE_RESERVED, and
1622                  * should be manually marked as free again
1623                  */
1624                 spin_lock_bh(&mvm->queue_info_lock);
1625                 status = &mvm->queue_info[reserved_txq].status;
1626                 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1627                          (*status != IWL_MVM_QUEUE_FREE),
1628                          "sta_id %d reserved txq %d status %d",
1629                          sta_id, reserved_txq, *status)) {
1630                         spin_unlock_bh(&mvm->queue_info_lock);
1631                         return -EINVAL;
1632                 }
1633
1634                 *status = IWL_MVM_QUEUE_FREE;
1635                 spin_unlock_bh(&mvm->queue_info_lock);
1636         }
1637
1638         if (vif->type == NL80211_IFTYPE_STATION &&
1639             mvmvif->ap_sta_id == sta_id) {
1640                 /* if associated - we can't remove the AP STA now */
1641                 if (vif->bss_conf.assoc)
1642                         return ret;
1643
1644                 /* unassoc - go ahead - remove the AP STA now */
1645                 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1646
1647                 /* clear d0i3_ap_sta_id if no longer relevant */
1648                 if (mvm->d0i3_ap_sta_id == sta_id)
1649                         mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1650         }
1651
1652         /*
1653          * This shouldn't happen - the TDLS channel switch should be canceled
1654          * before the STA is removed.
1655          */
1656         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1657                 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1658                 cancel_delayed_work(&mvm->tdls_cs.dwork);
1659         }
1660
1661         /*
1662          * Make sure that the tx response code sees the station as -EBUSY and
1663          * calls the drain worker.
1664          */
1665         spin_lock_bh(&mvm_sta->lock);
1666         spin_unlock_bh(&mvm_sta->lock);
1667
1668         ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1669         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1670
1671         return ret;
1672 }
1673
1674 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1675                       struct ieee80211_vif *vif,
1676                       u8 sta_id)
1677 {
1678         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1679
1680         lockdep_assert_held(&mvm->mutex);
1681
1682         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1683         return ret;
1684 }
1685
1686 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1687                              struct iwl_mvm_int_sta *sta,
1688                              u32 qmask, enum nl80211_iftype iftype,
1689                              enum iwl_sta_type type)
1690 {
1691         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1692                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1693                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1694                         return -ENOSPC;
1695         }
1696
1697         sta->tfd_queue_msk = qmask;
1698         sta->type = type;
1699
1700         /* put a non-NULL value so iterating over the stations won't stop */
1701         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1702         return 0;
1703 }
1704
1705 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1706 {
1707         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1708         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1709         sta->sta_id = IWL_MVM_INVALID_STA;
1710 }
1711
1712 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue,
1713                                           u8 sta_id, u8 fifo)
1714 {
1715         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1716                                         mvm->cfg->base_params->wd_timeout :
1717                                         IWL_WATCHDOG_DISABLED;
1718
1719         if (iwl_mvm_has_new_tx_api(mvm)) {
1720                 int tvqm_queue =
1721                         iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id,
1722                                                 IWL_MAX_TID_COUNT,
1723                                                 wdg_timeout);
1724                 *queue = tvqm_queue;
1725         } else {
1726                 struct iwl_trans_txq_scd_cfg cfg = {
1727                         .fifo = fifo,
1728                         .sta_id = sta_id,
1729                         .tid = IWL_MAX_TID_COUNT,
1730                         .aggregate = false,
1731                         .frame_limit = IWL_FRAME_LIMIT,
1732                 };
1733
1734                 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout);
1735         }
1736 }
1737
1738 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1739 {
1740         int ret;
1741
1742         lockdep_assert_held(&mvm->mutex);
1743
1744         /* Allocate aux station and assign to it the aux queue */
1745         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1746                                        NL80211_IFTYPE_UNSPECIFIED,
1747                                        IWL_STA_AUX_ACTIVITY);
1748         if (ret)
1749                 return ret;
1750
1751         /* Map Aux queue to fifo - needs to happen before adding Aux station */
1752         if (!iwl_mvm_has_new_tx_api(mvm))
1753                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1754                                               mvm->aux_sta.sta_id,
1755                                               IWL_MVM_TX_FIFO_MCAST);
1756
1757         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1758                                          MAC_INDEX_AUX, 0);
1759         if (ret) {
1760                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1761                 return ret;
1762         }
1763
1764         /*
1765          * For a000 firmware and on we cannot add queue to a station unknown
1766          * to firmware so enable queue here - after the station was added
1767          */
1768         if (iwl_mvm_has_new_tx_api(mvm))
1769                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1770                                               mvm->aux_sta.sta_id,
1771                                               IWL_MVM_TX_FIFO_MCAST);
1772
1773         return 0;
1774 }
1775
1776 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1777 {
1778         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1779         int ret;
1780
1781         lockdep_assert_held(&mvm->mutex);
1782
1783         /* Map snif queue to fifo - must happen before adding snif station */
1784         if (!iwl_mvm_has_new_tx_api(mvm))
1785                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1786                                               mvm->snif_sta.sta_id,
1787                                               IWL_MVM_TX_FIFO_BE);
1788
1789         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1790                                          mvmvif->id, 0);
1791         if (ret)
1792                 return ret;
1793
1794         /*
1795          * For 22000 firmware and on we cannot add queue to a station unknown
1796          * to firmware so enable queue here - after the station was added
1797          */
1798         if (iwl_mvm_has_new_tx_api(mvm))
1799                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1800                                               mvm->snif_sta.sta_id,
1801                                               IWL_MVM_TX_FIFO_BE);
1802
1803         return 0;
1804 }
1805
1806 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1807 {
1808         int ret;
1809
1810         lockdep_assert_held(&mvm->mutex);
1811
1812         iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue,
1813                             IWL_MAX_TID_COUNT, 0);
1814         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1815         if (ret)
1816                 IWL_WARN(mvm, "Failed sending remove station\n");
1817
1818         return ret;
1819 }
1820
1821 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1822 {
1823         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1824 }
1825
1826 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1827 {
1828         lockdep_assert_held(&mvm->mutex);
1829
1830         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1831 }
1832
1833 /*
1834  * Send the add station command for the vif's broadcast station.
1835  * Assumes that the station was already allocated.
1836  *
1837  * @mvm: the mvm component
1838  * @vif: the interface to which the broadcast station is added
1839  * @bsta: the broadcast station to add.
1840  */
1841 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1842 {
1843         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1844         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1845         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1846         const u8 *baddr = _baddr;
1847         int queue;
1848         int ret;
1849         unsigned int wdg_timeout =
1850                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1851         struct iwl_trans_txq_scd_cfg cfg = {
1852                 .fifo = IWL_MVM_TX_FIFO_VO,
1853                 .sta_id = mvmvif->bcast_sta.sta_id,
1854                 .tid = IWL_MAX_TID_COUNT,
1855                 .aggregate = false,
1856                 .frame_limit = IWL_FRAME_LIMIT,
1857         };
1858
1859         lockdep_assert_held(&mvm->mutex);
1860
1861         if (!iwl_mvm_has_new_tx_api(mvm)) {
1862                 if (vif->type == NL80211_IFTYPE_AP ||
1863                     vif->type == NL80211_IFTYPE_ADHOC)
1864                         queue = mvm->probe_queue;
1865                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1866                         queue = mvm->p2p_dev_queue;
1867                 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1868                         return -EINVAL;
1869
1870                 bsta->tfd_queue_msk |= BIT(queue);
1871
1872                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1873                                    &cfg, wdg_timeout);
1874         }
1875
1876         if (vif->type == NL80211_IFTYPE_ADHOC)
1877                 baddr = vif->bss_conf.bssid;
1878
1879         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1880                 return -ENOSPC;
1881
1882         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1883                                          mvmvif->id, mvmvif->color);
1884         if (ret)
1885                 return ret;
1886
1887         /*
1888          * For a000 firmware and on we cannot add queue to a station unknown
1889          * to firmware so enable queue here - after the station was added
1890          */
1891         if (iwl_mvm_has_new_tx_api(mvm)) {
1892                 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1893                                                 bsta->sta_id,
1894                                                 IWL_MAX_TID_COUNT,
1895                                                 wdg_timeout);
1896
1897                 if (vif->type == NL80211_IFTYPE_AP ||
1898                     vif->type == NL80211_IFTYPE_ADHOC)
1899                         mvm->probe_queue = queue;
1900                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1901                         mvm->p2p_dev_queue = queue;
1902         }
1903
1904         return 0;
1905 }
1906
1907 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1908                                           struct ieee80211_vif *vif)
1909 {
1910         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1911         int queue;
1912
1913         lockdep_assert_held(&mvm->mutex);
1914
1915         iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
1916
1917         switch (vif->type) {
1918         case NL80211_IFTYPE_AP:
1919         case NL80211_IFTYPE_ADHOC:
1920                 queue = mvm->probe_queue;
1921                 break;
1922         case NL80211_IFTYPE_P2P_DEVICE:
1923                 queue = mvm->p2p_dev_queue;
1924                 break;
1925         default:
1926                 WARN(1, "Can't free bcast queue on vif type %d\n",
1927                      vif->type);
1928                 return;
1929         }
1930
1931         iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
1932         if (iwl_mvm_has_new_tx_api(mvm))
1933                 return;
1934
1935         WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
1936         mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
1937 }
1938
1939 /* Send the FW a request to remove the station from it's internal data
1940  * structures, but DO NOT remove the entry from the local data structures. */
1941 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1942 {
1943         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1944         int ret;
1945
1946         lockdep_assert_held(&mvm->mutex);
1947
1948         iwl_mvm_free_bcast_sta_queues(mvm, vif);
1949
1950         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1951         if (ret)
1952                 IWL_WARN(mvm, "Failed sending remove station\n");
1953         return ret;
1954 }
1955
1956 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1957 {
1958         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1959
1960         lockdep_assert_held(&mvm->mutex);
1961
1962         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
1963                                         ieee80211_vif_type_p2p(vif),
1964                                         IWL_STA_GENERAL_PURPOSE);
1965 }
1966
1967 /* Allocate a new station entry for the broadcast station to the given vif,
1968  * and send it to the FW.
1969  * Note that each P2P mac should have its own broadcast station.
1970  *
1971  * @mvm: the mvm component
1972  * @vif: the interface to which the broadcast station is added
1973  * @bsta: the broadcast station to add. */
1974 int iwl_mvm_add_p2p_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         int ret;
1979
1980         lockdep_assert_held(&mvm->mutex);
1981
1982         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1983         if (ret)
1984                 return ret;
1985
1986         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1987
1988         if (ret)
1989                 iwl_mvm_dealloc_int_sta(mvm, bsta);
1990
1991         return ret;
1992 }
1993
1994 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1995 {
1996         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1997
1998         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1999 }
2000
2001 /*
2002  * Send the FW a request to remove the station from it's internal data
2003  * structures, and in addition remove it from the local data structure.
2004  */
2005 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2006 {
2007         int ret;
2008
2009         lockdep_assert_held(&mvm->mutex);
2010
2011         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2012
2013         iwl_mvm_dealloc_bcast_sta(mvm, vif);
2014
2015         return ret;
2016 }
2017
2018 /*
2019  * Allocate a new station entry for the multicast station to the given vif,
2020  * and send it to the FW.
2021  * Note that each AP/GO mac should have its own multicast station.
2022  *
2023  * @mvm: the mvm component
2024  * @vif: the interface to which the multicast station is added
2025  */
2026 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2027 {
2028         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2029         struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2030         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2031         const u8 *maddr = _maddr;
2032         struct iwl_trans_txq_scd_cfg cfg = {
2033                 .fifo = IWL_MVM_TX_FIFO_MCAST,
2034                 .sta_id = msta->sta_id,
2035                 .tid = IWL_MAX_TID_COUNT,
2036                 .aggregate = false,
2037                 .frame_limit = IWL_FRAME_LIMIT,
2038         };
2039         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2040         int ret;
2041
2042         lockdep_assert_held(&mvm->mutex);
2043
2044         if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2045                     vif->type != NL80211_IFTYPE_ADHOC))
2046                 return -ENOTSUPP;
2047
2048         /*
2049          * While in previous FWs we had to exclude cab queue from TFD queue
2050          * mask, now it is needed as any other queue.
2051          */
2052         if (!iwl_mvm_has_new_tx_api(mvm) &&
2053             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2054                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2055                                    &cfg, timeout);
2056                 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2057         }
2058         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2059                                          mvmvif->id, mvmvif->color);
2060         if (ret) {
2061                 iwl_mvm_dealloc_int_sta(mvm, msta);
2062                 return ret;
2063         }
2064
2065         /*
2066          * Enable cab queue after the ADD_STA command is sent.
2067          * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2068          * command with unknown station id, and for FW that doesn't support
2069          * station API since the cab queue is not included in the
2070          * tfd_queue_mask.
2071          */
2072         if (iwl_mvm_has_new_tx_api(mvm)) {
2073                 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2074                                                     msta->sta_id,
2075                                                     IWL_MAX_TID_COUNT,
2076                                                     timeout);
2077                 mvmvif->cab_queue = queue;
2078         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2079                                IWL_UCODE_TLV_API_STA_TYPE)) {
2080                 /*
2081                  * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2082                  * invalid, so make sure we use the queue we want.
2083                  * Note that this is done here as we want to avoid making DQA
2084                  * changes in mac80211 layer.
2085                  */
2086                 if (vif->type == NL80211_IFTYPE_ADHOC) {
2087                         vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2088                         mvmvif->cab_queue = vif->cab_queue;
2089                 }
2090                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2091                                    &cfg, timeout);
2092         }
2093
2094         return 0;
2095 }
2096
2097 /*
2098  * Send the FW a request to remove the station from it's internal data
2099  * structures, and in addition remove it from the local data structure.
2100  */
2101 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2102 {
2103         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2104         int ret;
2105
2106         lockdep_assert_held(&mvm->mutex);
2107
2108         iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2109
2110         iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2111                             IWL_MAX_TID_COUNT, 0);
2112
2113         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2114         if (ret)
2115                 IWL_WARN(mvm, "Failed sending remove station\n");
2116
2117         return ret;
2118 }
2119
2120 #define IWL_MAX_RX_BA_SESSIONS 16
2121
2122 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2123 {
2124         struct iwl_mvm_delba_notif notif = {
2125                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2126                 .metadata.sync = 1,
2127                 .delba.baid = baid,
2128         };
2129         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2130 };
2131
2132 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2133                                  struct iwl_mvm_baid_data *data)
2134 {
2135         int i;
2136
2137         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2138
2139         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2140                 int j;
2141                 struct iwl_mvm_reorder_buffer *reorder_buf =
2142                         &data->reorder_buf[i];
2143                 struct iwl_mvm_reorder_buf_entry *entries =
2144                         &data->entries[i * data->entries_per_queue];
2145
2146                 spin_lock_bh(&reorder_buf->lock);
2147                 if (likely(!reorder_buf->num_stored)) {
2148                         spin_unlock_bh(&reorder_buf->lock);
2149                         continue;
2150                 }
2151
2152                 /*
2153                  * This shouldn't happen in regular DELBA since the internal
2154                  * delBA notification should trigger a release of all frames in
2155                  * the reorder buffer.
2156                  */
2157                 WARN_ON(1);
2158
2159                 for (j = 0; j < reorder_buf->buf_size; j++)
2160                         __skb_queue_purge(&entries[j].e.frames);
2161                 /*
2162                  * Prevent timer re-arm. This prevents a very far fetched case
2163                  * where we timed out on the notification. There may be prior
2164                  * RX frames pending in the RX queue before the notification
2165                  * that might get processed between now and the actual deletion
2166                  * and we would re-arm the timer although we are deleting the
2167                  * reorder buffer.
2168                  */
2169                 reorder_buf->removed = true;
2170                 spin_unlock_bh(&reorder_buf->lock);
2171                 del_timer_sync(&reorder_buf->reorder_timer);
2172         }
2173 }
2174
2175 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2176                                         struct iwl_mvm_baid_data *data,
2177                                         u16 ssn, u8 buf_size)
2178 {
2179         int i;
2180
2181         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2182                 struct iwl_mvm_reorder_buffer *reorder_buf =
2183                         &data->reorder_buf[i];
2184                 struct iwl_mvm_reorder_buf_entry *entries =
2185                         &data->entries[i * data->entries_per_queue];
2186                 int j;
2187
2188                 reorder_buf->num_stored = 0;
2189                 reorder_buf->head_sn = ssn;
2190                 reorder_buf->buf_size = buf_size;
2191                 /* rx reorder timer */
2192                 timer_setup(&reorder_buf->reorder_timer,
2193                             iwl_mvm_reorder_timer_expired, 0);
2194                 spin_lock_init(&reorder_buf->lock);
2195                 reorder_buf->mvm = mvm;
2196                 reorder_buf->queue = i;
2197                 reorder_buf->valid = false;
2198                 for (j = 0; j < reorder_buf->buf_size; j++)
2199                         __skb_queue_head_init(&entries[j].e.frames);
2200         }
2201 }
2202
2203 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2204                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2205 {
2206         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2207         struct iwl_mvm_add_sta_cmd cmd = {};
2208         struct iwl_mvm_baid_data *baid_data = NULL;
2209         int ret;
2210         u32 status;
2211
2212         lockdep_assert_held(&mvm->mutex);
2213
2214         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2215                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2216                 return -ENOSPC;
2217         }
2218
2219         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2220                 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2221
2222                 /* sparse doesn't like the __align() so don't check */
2223 #ifndef __CHECKER__
2224                 /*
2225                  * The division below will be OK if either the cache line size
2226                  * can be divided by the entry size (ALIGN will round up) or if
2227                  * if the entry size can be divided by the cache line size, in
2228                  * which case the ALIGN() will do nothing.
2229                  */
2230                 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2231                              sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2232 #endif
2233
2234                 /*
2235                  * Upward align the reorder buffer size to fill an entire cache
2236                  * line for each queue, to avoid sharing cache lines between
2237                  * different queues.
2238                  */
2239                 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2240
2241                 /*
2242                  * Allocate here so if allocation fails we can bail out early
2243                  * before starting the BA session in the firmware
2244                  */
2245                 baid_data = kzalloc(sizeof(*baid_data) +
2246                                     mvm->trans->num_rx_queues *
2247                                     reorder_buf_size,
2248                                     GFP_KERNEL);
2249                 if (!baid_data)
2250                         return -ENOMEM;
2251
2252                 /*
2253                  * This division is why we need the above BUILD_BUG_ON(),
2254                  * if that doesn't hold then this will not be right.
2255                  */
2256                 baid_data->entries_per_queue =
2257                         reorder_buf_size / sizeof(baid_data->entries[0]);
2258         }
2259
2260         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2261         cmd.sta_id = mvm_sta->sta_id;
2262         cmd.add_modify = STA_MODE_MODIFY;
2263         if (start) {
2264                 cmd.add_immediate_ba_tid = (u8) tid;
2265                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2266                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2267         } else {
2268                 cmd.remove_immediate_ba_tid = (u8) tid;
2269         }
2270         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2271                                   STA_MODIFY_REMOVE_BA_TID;
2272
2273         status = ADD_STA_SUCCESS;
2274         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2275                                           iwl_mvm_add_sta_cmd_size(mvm),
2276                                           &cmd, &status);
2277         if (ret)
2278                 goto out_free;
2279
2280         switch (status & IWL_ADD_STA_STATUS_MASK) {
2281         case ADD_STA_SUCCESS:
2282                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2283                              start ? "start" : "stopp");
2284                 break;
2285         case ADD_STA_IMMEDIATE_BA_FAILURE:
2286                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2287                 ret = -ENOSPC;
2288                 break;
2289         default:
2290                 ret = -EIO;
2291                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2292                         start ? "start" : "stopp", status);
2293                 break;
2294         }
2295
2296         if (ret)
2297                 goto out_free;
2298
2299         if (start) {
2300                 u8 baid;
2301
2302                 mvm->rx_ba_sessions++;
2303
2304                 if (!iwl_mvm_has_new_rx_api(mvm))
2305                         return 0;
2306
2307                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2308                         ret = -EINVAL;
2309                         goto out_free;
2310                 }
2311                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2312                             IWL_ADD_STA_BAID_SHIFT);
2313                 baid_data->baid = baid;
2314                 baid_data->timeout = timeout;
2315                 baid_data->last_rx = jiffies;
2316                 baid_data->rcu_ptr = &mvm->baid_map[baid];
2317                 timer_setup(&baid_data->session_timer,
2318                             iwl_mvm_rx_agg_session_expired, 0);
2319                 baid_data->mvm = mvm;
2320                 baid_data->tid = tid;
2321                 baid_data->sta_id = mvm_sta->sta_id;
2322
2323                 mvm_sta->tid_to_baid[tid] = baid;
2324                 if (timeout)
2325                         mod_timer(&baid_data->session_timer,
2326                                   TU_TO_EXP_TIME(timeout * 2));
2327
2328                 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2329                 /*
2330                  * protect the BA data with RCU to cover a case where our
2331                  * internal RX sync mechanism will timeout (not that it's
2332                  * supposed to happen) and we will free the session data while
2333                  * RX is being processed in parallel
2334                  */
2335                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2336                              mvm_sta->sta_id, tid, baid);
2337                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2338                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2339         } else  {
2340                 u8 baid = mvm_sta->tid_to_baid[tid];
2341
2342                 if (mvm->rx_ba_sessions > 0)
2343                         /* check that restart flow didn't zero the counter */
2344                         mvm->rx_ba_sessions--;
2345                 if (!iwl_mvm_has_new_rx_api(mvm))
2346                         return 0;
2347
2348                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2349                         return -EINVAL;
2350
2351                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2352                 if (WARN_ON(!baid_data))
2353                         return -EINVAL;
2354
2355                 /* synchronize all rx queues so we can safely delete */
2356                 iwl_mvm_free_reorder(mvm, baid_data);
2357                 del_timer_sync(&baid_data->session_timer);
2358                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2359                 kfree_rcu(baid_data, rcu_head);
2360                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2361         }
2362         return 0;
2363
2364 out_free:
2365         kfree(baid_data);
2366         return ret;
2367 }
2368
2369 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2370                        int tid, u8 queue, bool start)
2371 {
2372         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2373         struct iwl_mvm_add_sta_cmd cmd = {};
2374         int ret;
2375         u32 status;
2376
2377         lockdep_assert_held(&mvm->mutex);
2378
2379         if (start) {
2380                 mvm_sta->tfd_queue_msk |= BIT(queue);
2381                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2382         } else {
2383                 /* In DQA-mode the queue isn't removed on agg termination */
2384                 mvm_sta->tid_disable_agg |= BIT(tid);
2385         }
2386
2387         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2388         cmd.sta_id = mvm_sta->sta_id;
2389         cmd.add_modify = STA_MODE_MODIFY;
2390         if (!iwl_mvm_has_new_tx_api(mvm))
2391                 cmd.modify_mask = STA_MODIFY_QUEUES;
2392         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2393         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2394         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2395
2396         status = ADD_STA_SUCCESS;
2397         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2398                                           iwl_mvm_add_sta_cmd_size(mvm),
2399                                           &cmd, &status);
2400         if (ret)
2401                 return ret;
2402
2403         switch (status & IWL_ADD_STA_STATUS_MASK) {
2404         case ADD_STA_SUCCESS:
2405                 break;
2406         default:
2407                 ret = -EIO;
2408                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2409                         start ? "start" : "stopp", status);
2410                 break;
2411         }
2412
2413         return ret;
2414 }
2415
2416 const u8 tid_to_mac80211_ac[] = {
2417         IEEE80211_AC_BE,
2418         IEEE80211_AC_BK,
2419         IEEE80211_AC_BK,
2420         IEEE80211_AC_BE,
2421         IEEE80211_AC_VI,
2422         IEEE80211_AC_VI,
2423         IEEE80211_AC_VO,
2424         IEEE80211_AC_VO,
2425         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2426 };
2427
2428 static const u8 tid_to_ucode_ac[] = {
2429         AC_BE,
2430         AC_BK,
2431         AC_BK,
2432         AC_BE,
2433         AC_VI,
2434         AC_VI,
2435         AC_VO,
2436         AC_VO,
2437 };
2438
2439 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2440                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2441 {
2442         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2443         struct iwl_mvm_tid_data *tid_data;
2444         u16 normalized_ssn;
2445         int txq_id;
2446         int ret;
2447
2448         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2449                 return -EINVAL;
2450
2451         if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2452             mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2453                 IWL_ERR(mvm,
2454                         "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2455                         mvmsta->tid_data[tid].state);
2456                 return -ENXIO;
2457         }
2458
2459         lockdep_assert_held(&mvm->mutex);
2460
2461         spin_lock_bh(&mvmsta->lock);
2462
2463         /* possible race condition - we entered D0i3 while starting agg */
2464         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2465                 spin_unlock_bh(&mvmsta->lock);
2466                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2467                 return -EIO;
2468         }
2469
2470         spin_lock(&mvm->queue_info_lock);
2471
2472         /*
2473          * Note the possible cases:
2474          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2475          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2476          *      one and mark it as reserved
2477          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2478          *      non-DQA mode, since the TXQ hasn't yet been allocated
2479          * Don't support case 3 for new TX path as it is not expected to happen
2480          * and aggregation will be offloaded soon anyway
2481          */
2482         txq_id = mvmsta->tid_data[tid].txq_id;
2483         if (iwl_mvm_has_new_tx_api(mvm)) {
2484                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2485                         ret = -ENXIO;
2486                         goto release_locks;
2487                 }
2488         } else if (unlikely(mvm->queue_info[txq_id].status ==
2489                             IWL_MVM_QUEUE_SHARED)) {
2490                 ret = -ENXIO;
2491                 IWL_DEBUG_TX_QUEUES(mvm,
2492                                     "Can't start tid %d agg on shared queue!\n",
2493                                     tid);
2494                 goto release_locks;
2495         } else if (mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2496                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2497                                                  IWL_MVM_DQA_MIN_DATA_QUEUE,
2498                                                  IWL_MVM_DQA_MAX_DATA_QUEUE);
2499                 if (txq_id < 0) {
2500                         ret = txq_id;
2501                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2502                         goto release_locks;
2503                 }
2504                 /*
2505                  * TXQ shouldn't be in inactive mode for non-DQA, so getting
2506                  * an inactive queue from iwl_mvm_find_free_queue() is
2507                  * certainly a bug
2508                  */
2509                 WARN_ON(mvm->queue_info[txq_id].status ==
2510                         IWL_MVM_QUEUE_INACTIVE);
2511
2512                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2513                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2514         }
2515
2516         spin_unlock(&mvm->queue_info_lock);
2517
2518         IWL_DEBUG_TX_QUEUES(mvm,
2519                             "AGG for tid %d will be on queue #%d\n",
2520                             tid, txq_id);
2521
2522         tid_data = &mvmsta->tid_data[tid];
2523         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2524         tid_data->txq_id = txq_id;
2525         *ssn = tid_data->ssn;
2526
2527         IWL_DEBUG_TX_QUEUES(mvm,
2528                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2529                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2530                             tid_data->next_reclaimed);
2531
2532         /*
2533          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
2534          * to align the wrap around of ssn so we compare relevant values.
2535          */
2536         normalized_ssn = tid_data->ssn;
2537         if (mvm->trans->cfg->gen2)
2538                 normalized_ssn &= 0xff;
2539
2540         if (normalized_ssn == tid_data->next_reclaimed) {
2541                 tid_data->state = IWL_AGG_STARTING;
2542                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2543         } else {
2544                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2545         }
2546
2547         ret = 0;
2548         goto out;
2549
2550 release_locks:
2551         spin_unlock(&mvm->queue_info_lock);
2552 out:
2553         spin_unlock_bh(&mvmsta->lock);
2554
2555         return ret;
2556 }
2557
2558 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2559                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2560                             bool amsdu)
2561 {
2562         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2563         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2564         unsigned int wdg_timeout =
2565                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2566         int queue, ret;
2567         bool alloc_queue = true;
2568         enum iwl_mvm_queue_status queue_status;
2569         u16 ssn;
2570
2571         struct iwl_trans_txq_scd_cfg cfg = {
2572                 .sta_id = mvmsta->sta_id,
2573                 .tid = tid,
2574                 .frame_limit = buf_size,
2575                 .aggregate = true,
2576         };
2577
2578         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2579                      != IWL_MAX_TID_COUNT);
2580
2581         spin_lock_bh(&mvmsta->lock);
2582         ssn = tid_data->ssn;
2583         queue = tid_data->txq_id;
2584         tid_data->state = IWL_AGG_ON;
2585         mvmsta->agg_tids |= BIT(tid);
2586         tid_data->ssn = 0xffff;
2587         tid_data->amsdu_in_ampdu_allowed = amsdu;
2588         spin_unlock_bh(&mvmsta->lock);
2589
2590         if (iwl_mvm_has_new_tx_api(mvm)) {
2591                 /*
2592                  * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2593                  * would have failed, so if we are here there is no need to
2594                  * allocate a queue.
2595                  * However, if aggregation size is different than the default
2596                  * size, the scheduler should be reconfigured.
2597                  * We cannot do this with the new TX API, so return unsupported
2598                  * for now, until it will be offloaded to firmware..
2599                  * Note that if SCD default value changes - this condition
2600                  * should be updated as well.
2601                  */
2602                 if (buf_size < IWL_FRAME_LIMIT)
2603                         return -ENOTSUPP;
2604
2605                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2606                 if (ret)
2607                         return -EIO;
2608                 goto out;
2609         }
2610
2611         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2612
2613         spin_lock_bh(&mvm->queue_info_lock);
2614         queue_status = mvm->queue_info[queue].status;
2615         spin_unlock_bh(&mvm->queue_info_lock);
2616
2617         /* Maybe there is no need to even alloc a queue... */
2618         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2619                 alloc_queue = false;
2620
2621         /*
2622          * Only reconfig the SCD for the queue if the window size has
2623          * changed from current (become smaller)
2624          */
2625         if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2626                 /*
2627                  * If reconfiguring an existing queue, it first must be
2628                  * drained
2629                  */
2630                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2631                                                      BIT(queue));
2632                 if (ret) {
2633                         IWL_ERR(mvm,
2634                                 "Error draining queue before reconfig\n");
2635                         return ret;
2636                 }
2637
2638                 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2639                                            mvmsta->sta_id, tid,
2640                                            buf_size, ssn);
2641                 if (ret) {
2642                         IWL_ERR(mvm,
2643                                 "Error reconfiguring TXQ #%d\n", queue);
2644                         return ret;
2645                 }
2646         }
2647
2648         if (alloc_queue)
2649                 iwl_mvm_enable_txq(mvm, queue,
2650                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2651                                    &cfg, wdg_timeout);
2652
2653         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2654         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2655                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2656                 if (ret)
2657                         return -EIO;
2658         }
2659
2660         /* No need to mark as reserved */
2661         spin_lock_bh(&mvm->queue_info_lock);
2662         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2663         spin_unlock_bh(&mvm->queue_info_lock);
2664
2665 out:
2666         /*
2667          * Even though in theory the peer could have different
2668          * aggregation reorder buffer sizes for different sessions,
2669          * our ucode doesn't allow for that and has a global limit
2670          * for each station. Therefore, use the minimum of all the
2671          * aggregation sessions and our default value.
2672          */
2673         mvmsta->max_agg_bufsize =
2674                 min(mvmsta->max_agg_bufsize, buf_size);
2675         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2676
2677         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2678                      sta->addr, tid);
2679
2680         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2681 }
2682
2683 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2684                                         struct iwl_mvm_sta *mvmsta,
2685                                         u16 txq_id)
2686 {
2687         if (iwl_mvm_has_new_tx_api(mvm))
2688                 return;
2689
2690         spin_lock_bh(&mvm->queue_info_lock);
2691         /*
2692          * The TXQ is marked as reserved only if no traffic came through yet
2693          * This means no traffic has been sent on this TID (agg'd or not), so
2694          * we no longer have use for the queue. Since it hasn't even been
2695          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2696          * free.
2697          */
2698         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2699                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2700
2701         spin_unlock_bh(&mvm->queue_info_lock);
2702 }
2703
2704 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2705                             struct ieee80211_sta *sta, u16 tid)
2706 {
2707         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2708         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2709         u16 txq_id;
2710         int err;
2711
2712         /*
2713          * If mac80211 is cleaning its state, then say that we finished since
2714          * our state has been cleared anyway.
2715          */
2716         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2717                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2718                 return 0;
2719         }
2720
2721         spin_lock_bh(&mvmsta->lock);
2722
2723         txq_id = tid_data->txq_id;
2724
2725         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2726                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2727
2728         mvmsta->agg_tids &= ~BIT(tid);
2729
2730         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2731
2732         switch (tid_data->state) {
2733         case IWL_AGG_ON:
2734                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2735
2736                 IWL_DEBUG_TX_QUEUES(mvm,
2737                                     "ssn = %d, next_recl = %d\n",
2738                                     tid_data->ssn, tid_data->next_reclaimed);
2739
2740                 tid_data->ssn = 0xffff;
2741                 tid_data->state = IWL_AGG_OFF;
2742                 spin_unlock_bh(&mvmsta->lock);
2743
2744                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2745
2746                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2747                 return 0;
2748         case IWL_AGG_STARTING:
2749         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2750                 /*
2751                  * The agg session has been stopped before it was set up. This
2752                  * can happen when the AddBA timer times out for example.
2753                  */
2754
2755                 /* No barriers since we are under mutex */
2756                 lockdep_assert_held(&mvm->mutex);
2757
2758                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2759                 tid_data->state = IWL_AGG_OFF;
2760                 err = 0;
2761                 break;
2762         default:
2763                 IWL_ERR(mvm,
2764                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2765                         mvmsta->sta_id, tid, tid_data->state);
2766                 IWL_ERR(mvm,
2767                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2768                 err = -EINVAL;
2769         }
2770
2771         spin_unlock_bh(&mvmsta->lock);
2772
2773         return err;
2774 }
2775
2776 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2777                             struct ieee80211_sta *sta, u16 tid)
2778 {
2779         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2780         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2781         u16 txq_id;
2782         enum iwl_mvm_agg_state old_state;
2783
2784         /*
2785          * First set the agg state to OFF to avoid calling
2786          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2787          */
2788         spin_lock_bh(&mvmsta->lock);
2789         txq_id = tid_data->txq_id;
2790         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2791                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2792         old_state = tid_data->state;
2793         tid_data->state = IWL_AGG_OFF;
2794         mvmsta->agg_tids &= ~BIT(tid);
2795         spin_unlock_bh(&mvmsta->lock);
2796
2797         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2798
2799         if (old_state >= IWL_AGG_ON) {
2800                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2801
2802                 if (iwl_mvm_has_new_tx_api(mvm)) {
2803                         if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2804                                                    BIT(tid), 0))
2805                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2806                         iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2807                 } else {
2808                         if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2809                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2810                         iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2811                 }
2812
2813                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2814
2815                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2816         }
2817
2818         return 0;
2819 }
2820
2821 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2822 {
2823         int i, max = -1, max_offs = -1;
2824
2825         lockdep_assert_held(&mvm->mutex);
2826
2827         /* Pick the unused key offset with the highest 'deleted'
2828          * counter. Every time a key is deleted, all the counters
2829          * are incremented and the one that was just deleted is
2830          * reset to zero. Thus, the highest counter is the one
2831          * that was deleted longest ago. Pick that one.
2832          */
2833         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2834                 if (test_bit(i, mvm->fw_key_table))
2835                         continue;
2836                 if (mvm->fw_key_deleted[i] > max) {
2837                         max = mvm->fw_key_deleted[i];
2838                         max_offs = i;
2839                 }
2840         }
2841
2842         if (max_offs < 0)
2843                 return STA_KEY_IDX_INVALID;
2844
2845         return max_offs;
2846 }
2847
2848 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2849                                                struct ieee80211_vif *vif,
2850                                                struct ieee80211_sta *sta)
2851 {
2852         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2853
2854         if (sta)
2855                 return iwl_mvm_sta_from_mac80211(sta);
2856
2857         /*
2858          * The device expects GTKs for station interfaces to be
2859          * installed as GTKs for the AP station. If we have no
2860          * station ID, then use AP's station ID.
2861          */
2862         if (vif->type == NL80211_IFTYPE_STATION &&
2863             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2864                 u8 sta_id = mvmvif->ap_sta_id;
2865
2866                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2867                                             lockdep_is_held(&mvm->mutex));
2868
2869                 /*
2870                  * It is possible that the 'sta' parameter is NULL,
2871                  * for example when a GTK is removed - the sta_id will then
2872                  * be the AP ID, and no station was passed by mac80211.
2873                  */
2874                 if (IS_ERR_OR_NULL(sta))
2875                         return NULL;
2876
2877                 return iwl_mvm_sta_from_mac80211(sta);
2878         }
2879
2880         return NULL;
2881 }
2882
2883 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2884                                 u32 sta_id,
2885                                 struct ieee80211_key_conf *key, bool mcast,
2886                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2887                                 u8 key_offset)
2888 {
2889         union {
2890                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2891                 struct iwl_mvm_add_sta_key_cmd cmd;
2892         } u = {};
2893         __le16 key_flags;
2894         int ret;
2895         u32 status;
2896         u16 keyidx;
2897         u64 pn = 0;
2898         int i, size;
2899         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2900                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2901
2902         if (sta_id == IWL_MVM_INVALID_STA)
2903                 return -EINVAL;
2904
2905         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2906                  STA_KEY_FLG_KEYID_MSK;
2907         key_flags = cpu_to_le16(keyidx);
2908         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2909
2910         switch (key->cipher) {
2911         case WLAN_CIPHER_SUITE_TKIP:
2912                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2913                 if (new_api) {
2914                         memcpy((void *)&u.cmd.tx_mic_key,
2915                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2916                                IWL_MIC_KEY_SIZE);
2917
2918                         memcpy((void *)&u.cmd.rx_mic_key,
2919                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2920                                IWL_MIC_KEY_SIZE);
2921                         pn = atomic64_read(&key->tx_pn);
2922
2923                 } else {
2924                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2925                         for (i = 0; i < 5; i++)
2926                                 u.cmd_v1.tkip_rx_ttak[i] =
2927                                         cpu_to_le16(tkip_p1k[i]);
2928                 }
2929                 memcpy(u.cmd.common.key, key->key, key->keylen);
2930                 break;
2931         case WLAN_CIPHER_SUITE_CCMP:
2932                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2933                 memcpy(u.cmd.common.key, key->key, key->keylen);
2934                 if (new_api)
2935                         pn = atomic64_read(&key->tx_pn);
2936                 break;
2937         case WLAN_CIPHER_SUITE_WEP104:
2938                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2939                 /* fall through */
2940         case WLAN_CIPHER_SUITE_WEP40:
2941                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2942                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2943                 break;
2944         case WLAN_CIPHER_SUITE_GCMP_256:
2945                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2946                 /* fall through */
2947         case WLAN_CIPHER_SUITE_GCMP:
2948                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2949                 memcpy(u.cmd.common.key, key->key, key->keylen);
2950                 if (new_api)
2951                         pn = atomic64_read(&key->tx_pn);
2952                 break;
2953         default:
2954                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2955                 memcpy(u.cmd.common.key, key->key, key->keylen);
2956         }
2957
2958         if (mcast)
2959                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2960
2961         u.cmd.common.key_offset = key_offset;
2962         u.cmd.common.key_flags = key_flags;
2963         u.cmd.common.sta_id = sta_id;
2964
2965         if (new_api) {
2966                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
2967                 size = sizeof(u.cmd);
2968         } else {
2969                 size = sizeof(u.cmd_v1);
2970         }
2971
2972         status = ADD_STA_SUCCESS;
2973         if (cmd_flags & CMD_ASYNC)
2974                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
2975                                            &u.cmd);
2976         else
2977                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
2978                                                   &u.cmd, &status);
2979
2980         switch (status) {
2981         case ADD_STA_SUCCESS:
2982                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2983                 break;
2984         default:
2985                 ret = -EIO;
2986                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
2987                 break;
2988         }
2989
2990         return ret;
2991 }
2992
2993 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
2994                                  struct ieee80211_key_conf *keyconf,
2995                                  u8 sta_id, bool remove_key)
2996 {
2997         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
2998
2999         /* verify the key details match the required command's expectations */
3000         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3001                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3002                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3003                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3004                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3005                 return -EINVAL;
3006
3007         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3008                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3009                 return -EINVAL;
3010
3011         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3012         igtk_cmd.sta_id = cpu_to_le32(sta_id);
3013
3014         if (remove_key) {
3015                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3016         } else {
3017                 struct ieee80211_key_seq seq;
3018                 const u8 *pn;
3019
3020                 switch (keyconf->cipher) {
3021                 case WLAN_CIPHER_SUITE_AES_CMAC:
3022                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3023                         break;
3024                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3025                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3026                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3027                         break;
3028                 default:
3029                         return -EINVAL;
3030                 }
3031
3032                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3033                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3034                         igtk_cmd.ctrl_flags |=
3035                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3036                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3037                 pn = seq.aes_cmac.pn;
3038                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3039                                                        ((u64) pn[4] << 8) |
3040                                                        ((u64) pn[3] << 16) |
3041                                                        ((u64) pn[2] << 24) |
3042                                                        ((u64) pn[1] << 32) |
3043                                                        ((u64) pn[0] << 40));
3044         }
3045
3046         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3047                        remove_key ? "removing" : "installing",
3048                        igtk_cmd.sta_id);
3049
3050         if (!iwl_mvm_has_new_rx_api(mvm)) {
3051                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3052                         .ctrl_flags = igtk_cmd.ctrl_flags,
3053                         .key_id = igtk_cmd.key_id,
3054                         .sta_id = igtk_cmd.sta_id,
3055                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3056                 };
3057
3058                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3059                        ARRAY_SIZE(igtk_cmd_v1.igtk));
3060                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3061                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3062         }
3063         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3064                                     sizeof(igtk_cmd), &igtk_cmd);
3065 }
3066
3067
3068 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3069                                        struct ieee80211_vif *vif,
3070                                        struct ieee80211_sta *sta)
3071 {
3072         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3073
3074         if (sta)
3075                 return sta->addr;
3076
3077         if (vif->type == NL80211_IFTYPE_STATION &&
3078             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3079                 u8 sta_id = mvmvif->ap_sta_id;
3080                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3081                                                 lockdep_is_held(&mvm->mutex));
3082                 return sta->addr;
3083         }
3084
3085
3086         return NULL;
3087 }
3088
3089 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3090                                  struct ieee80211_vif *vif,
3091                                  struct ieee80211_sta *sta,
3092                                  struct ieee80211_key_conf *keyconf,
3093                                  u8 key_offset,
3094                                  bool mcast)
3095 {
3096         int ret;
3097         const u8 *addr;
3098         struct ieee80211_key_seq seq;
3099         u16 p1k[5];
3100         u32 sta_id;
3101
3102         if (sta) {
3103                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3104
3105                 sta_id = mvm_sta->sta_id;
3106         } else if (vif->type == NL80211_IFTYPE_AP &&
3107                    !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3108                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3109
3110                 sta_id = mvmvif->mcast_sta.sta_id;
3111         } else {
3112                 IWL_ERR(mvm, "Failed to find station id\n");
3113                 return -EINVAL;
3114         }
3115
3116         switch (keyconf->cipher) {
3117         case WLAN_CIPHER_SUITE_TKIP:
3118                 if (vif->type == NL80211_IFTYPE_AP) {
3119                         ret = -EINVAL;
3120                         break;
3121                 }
3122                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3123                 /* get phase 1 key from mac80211 */
3124                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3125                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3126                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3127                                            seq.tkip.iv32, p1k, 0, key_offset);
3128                 break;
3129         case WLAN_CIPHER_SUITE_CCMP:
3130         case WLAN_CIPHER_SUITE_WEP40:
3131         case WLAN_CIPHER_SUITE_WEP104:
3132         case WLAN_CIPHER_SUITE_GCMP:
3133         case WLAN_CIPHER_SUITE_GCMP_256:
3134                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3135                                            0, NULL, 0, key_offset);
3136                 break;
3137         default:
3138                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3139                                            0, NULL, 0, key_offset);
3140         }
3141
3142         return ret;
3143 }
3144
3145 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3146                                     struct ieee80211_key_conf *keyconf,
3147                                     bool mcast)
3148 {
3149         union {
3150                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3151                 struct iwl_mvm_add_sta_key_cmd cmd;
3152         } u = {};
3153         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3154                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3155         __le16 key_flags;
3156         int ret, size;
3157         u32 status;
3158
3159         if (sta_id == IWL_MVM_INVALID_STA)
3160                 return -EINVAL;
3161
3162         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3163                                  STA_KEY_FLG_KEYID_MSK);
3164         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3165         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3166
3167         if (mcast)
3168                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3169
3170         /*
3171          * The fields assigned here are in the same location at the start
3172          * of the command, so we can do this union trick.
3173          */
3174         u.cmd.common.key_flags = key_flags;
3175         u.cmd.common.key_offset = keyconf->hw_key_idx;
3176         u.cmd.common.sta_id = sta_id;
3177
3178         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3179
3180         status = ADD_STA_SUCCESS;
3181         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3182                                           &status);
3183
3184         switch (status) {
3185         case ADD_STA_SUCCESS:
3186                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3187                 break;
3188         default:
3189                 ret = -EIO;
3190                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3191                 break;
3192         }
3193
3194         return ret;
3195 }
3196
3197 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3198                         struct ieee80211_vif *vif,
3199                         struct ieee80211_sta *sta,
3200                         struct ieee80211_key_conf *keyconf,
3201                         u8 key_offset)
3202 {
3203         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3204         struct iwl_mvm_sta *mvm_sta;
3205         u8 sta_id = IWL_MVM_INVALID_STA;
3206         int ret;
3207         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3208
3209         lockdep_assert_held(&mvm->mutex);
3210
3211         if (vif->type != NL80211_IFTYPE_AP ||
3212             keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3213                 /* Get the station id from the mvm local station table */
3214                 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3215                 if (!mvm_sta) {
3216                         IWL_ERR(mvm, "Failed to find station\n");
3217                         return -EINVAL;
3218                 }
3219                 sta_id = mvm_sta->sta_id;
3220
3221                 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3222                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3223                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3224                         ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id,
3225                                                     false);
3226                         goto end;
3227                 }
3228
3229                 /*
3230                  * It is possible that the 'sta' parameter is NULL, and thus
3231                  * there is a need to retrieve  the sta from the local station
3232                  * table.
3233                  */
3234                 if (!sta) {
3235                         sta = rcu_dereference_protected(
3236                                 mvm->fw_id_to_mac_id[sta_id],
3237                                 lockdep_is_held(&mvm->mutex));
3238                         if (IS_ERR_OR_NULL(sta)) {
3239                                 IWL_ERR(mvm, "Invalid station id\n");
3240                                 return -EINVAL;
3241                         }
3242                 }
3243
3244                 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3245                         return -EINVAL;
3246         }
3247
3248         /* If the key_offset is not pre-assigned, we need to find a
3249          * new offset to use.  In normal cases, the offset is not
3250          * pre-assigned, but during HW_RESTART we want to reuse the
3251          * same indices, so we pass them when this function is called.
3252          *
3253          * In D3 entry, we need to hardcoded the indices (because the
3254          * firmware hardcodes the PTK offset to 0).  In this case, we
3255          * need to make sure we don't overwrite the hw_key_idx in the
3256          * keyconf structure, because otherwise we cannot configure
3257          * the original ones back when resuming.
3258          */
3259         if (key_offset == STA_KEY_IDX_INVALID) {
3260                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3261                 if (key_offset == STA_KEY_IDX_INVALID)
3262                         return -ENOSPC;
3263                 keyconf->hw_key_idx = key_offset;
3264         }
3265
3266         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3267         if (ret)
3268                 goto end;
3269
3270         /*
3271          * For WEP, the same key is used for multicast and unicast. Upload it
3272          * again, using the same key offset, and now pointing the other one
3273          * to the same key slot (offset).
3274          * If this fails, remove the original as well.
3275          */
3276         if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3277              keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3278             sta) {
3279                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3280                                             key_offset, !mcast);
3281                 if (ret) {
3282                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3283                         goto end;
3284                 }
3285         }
3286
3287         __set_bit(key_offset, mvm->fw_key_table);
3288
3289 end:
3290         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3291                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3292                       sta ? sta->addr : zero_addr, ret);
3293         return ret;
3294 }
3295
3296 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3297                            struct ieee80211_vif *vif,
3298                            struct ieee80211_sta *sta,
3299                            struct ieee80211_key_conf *keyconf)
3300 {
3301         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3302         struct iwl_mvm_sta *mvm_sta;
3303         u8 sta_id = IWL_MVM_INVALID_STA;
3304         int ret, i;
3305
3306         lockdep_assert_held(&mvm->mutex);
3307
3308         /* Get the station from the mvm local station table */
3309         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3310         if (mvm_sta)
3311                 sta_id = mvm_sta->sta_id;
3312         else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3313                 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3314
3315
3316         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3317                       keyconf->keyidx, sta_id);
3318
3319         if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3320                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3321                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3322                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3323
3324         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3325                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3326                         keyconf->hw_key_idx);
3327                 return -ENOENT;
3328         }
3329
3330         /* track which key was deleted last */
3331         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3332                 if (mvm->fw_key_deleted[i] < U8_MAX)
3333                         mvm->fw_key_deleted[i]++;
3334         }
3335         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3336
3337         if (sta && !mvm_sta) {
3338                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3339                 return 0;
3340         }
3341
3342         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3343         if (ret)
3344                 return ret;
3345
3346         /* delete WEP key twice to get rid of (now useless) offset */
3347         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3348             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3349                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3350
3351         return ret;
3352 }
3353
3354 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3355                              struct ieee80211_vif *vif,
3356                              struct ieee80211_key_conf *keyconf,
3357                              struct ieee80211_sta *sta, u32 iv32,
3358                              u16 *phase1key)
3359 {
3360         struct iwl_mvm_sta *mvm_sta;
3361         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3362
3363         rcu_read_lock();
3364
3365         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3366         if (WARN_ON_ONCE(!mvm_sta))
3367                 goto unlock;
3368         iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3369                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3370
3371  unlock:
3372         rcu_read_unlock();
3373 }
3374
3375 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3376                                 struct ieee80211_sta *sta)
3377 {
3378         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3379         struct iwl_mvm_add_sta_cmd cmd = {
3380                 .add_modify = STA_MODE_MODIFY,
3381                 .sta_id = mvmsta->sta_id,
3382                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3383                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3384         };
3385         int ret;
3386
3387         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3388                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3389         if (ret)
3390                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3391 }
3392
3393 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3394                                        struct ieee80211_sta *sta,
3395                                        enum ieee80211_frame_release_type reason,
3396                                        u16 cnt, u16 tids, bool more_data,
3397                                        bool single_sta_queue)
3398 {
3399         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3400         struct iwl_mvm_add_sta_cmd cmd = {
3401                 .add_modify = STA_MODE_MODIFY,
3402                 .sta_id = mvmsta->sta_id,
3403                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3404                 .sleep_tx_count = cpu_to_le16(cnt),
3405                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3406         };
3407         int tid, ret;
3408         unsigned long _tids = tids;
3409
3410         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3411          * Note that this field is reserved and unused by firmware not
3412          * supporting GO uAPSD, so it's safe to always do this.
3413          */
3414         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3415                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3416
3417         /* If we're releasing frames from aggregation or dqa queues then check
3418          * if all the queues that we're releasing frames from, combined, have:
3419          *  - more frames than the service period, in which case more_data
3420          *    needs to be set
3421          *  - fewer than 'cnt' frames, in which case we need to adjust the
3422          *    firmware command (but do that unconditionally)
3423          */
3424         if (single_sta_queue) {
3425                 int remaining = cnt;
3426                 int sleep_tx_count;
3427
3428                 spin_lock_bh(&mvmsta->lock);
3429                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3430                         struct iwl_mvm_tid_data *tid_data;
3431                         u16 n_queued;
3432
3433                         tid_data = &mvmsta->tid_data[tid];
3434
3435                         n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3436                         if (n_queued > remaining) {
3437                                 more_data = true;
3438                                 remaining = 0;
3439                                 break;
3440                         }
3441                         remaining -= n_queued;
3442                 }
3443                 sleep_tx_count = cnt - remaining;
3444                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3445                         mvmsta->sleep_tx_count = sleep_tx_count;
3446                 spin_unlock_bh(&mvmsta->lock);
3447
3448                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3449                 if (WARN_ON(cnt - remaining == 0)) {
3450                         ieee80211_sta_eosp(sta);
3451                         return;
3452                 }
3453         }
3454
3455         /* Note: this is ignored by firmware not supporting GO uAPSD */
3456         if (more_data)
3457                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3458
3459         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3460                 mvmsta->next_status_eosp = true;
3461                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3462         } else {
3463                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3464         }
3465
3466         /* block the Tx queues until the FW updated the sleep Tx count */
3467         iwl_trans_block_txq_ptrs(mvm->trans, true);
3468
3469         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3470                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3471                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3472         if (ret)
3473                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3474 }
3475
3476 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3477                            struct iwl_rx_cmd_buffer *rxb)
3478 {
3479         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3480         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3481         struct ieee80211_sta *sta;
3482         u32 sta_id = le32_to_cpu(notif->sta_id);
3483
3484         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3485                 return;
3486
3487         rcu_read_lock();
3488         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3489         if (!IS_ERR_OR_NULL(sta))
3490                 ieee80211_sta_eosp(sta);
3491         rcu_read_unlock();
3492 }
3493
3494 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3495                                    struct iwl_mvm_sta *mvmsta, bool disable)
3496 {
3497         struct iwl_mvm_add_sta_cmd cmd = {
3498                 .add_modify = STA_MODE_MODIFY,
3499                 .sta_id = mvmsta->sta_id,
3500                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3501                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3502                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3503         };
3504         int ret;
3505
3506         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3507                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3508         if (ret)
3509                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3510 }
3511
3512 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3513                                       struct ieee80211_sta *sta,
3514                                       bool disable)
3515 {
3516         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3517
3518         spin_lock_bh(&mvm_sta->lock);
3519
3520         if (mvm_sta->disable_tx == disable) {
3521                 spin_unlock_bh(&mvm_sta->lock);
3522                 return;
3523         }
3524
3525         mvm_sta->disable_tx = disable;
3526
3527         /* Tell mac80211 to start/stop queuing tx for this station */
3528         ieee80211_sta_block_awake(mvm->hw, sta, disable);
3529
3530         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3531
3532         spin_unlock_bh(&mvm_sta->lock);
3533 }
3534
3535 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3536                                               struct iwl_mvm_vif *mvmvif,
3537                                               struct iwl_mvm_int_sta *sta,
3538                                               bool disable)
3539 {
3540         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3541         struct iwl_mvm_add_sta_cmd cmd = {
3542                 .add_modify = STA_MODE_MODIFY,
3543                 .sta_id = sta->sta_id,
3544                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3545                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3546                 .mac_id_n_color = cpu_to_le32(id),
3547         };
3548         int ret;
3549
3550         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3551                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3552         if (ret)
3553                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3554 }
3555
3556 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3557                                        struct iwl_mvm_vif *mvmvif,
3558                                        bool disable)
3559 {
3560         struct ieee80211_sta *sta;
3561         struct iwl_mvm_sta *mvm_sta;
3562         int i;
3563
3564         lockdep_assert_held(&mvm->mutex);
3565
3566         /* Block/unblock all the stations of the given mvmvif */
3567         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3568                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3569                                                 lockdep_is_held(&mvm->mutex));
3570                 if (IS_ERR_OR_NULL(sta))
3571                         continue;
3572
3573                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3574                 if (mvm_sta->mac_id_n_color !=
3575                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3576                         continue;
3577
3578                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3579         }
3580
3581         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3582                 return;
3583
3584         /* Need to block/unblock also multicast station */
3585         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3586                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3587                                                   &mvmvif->mcast_sta, disable);
3588
3589         /*
3590          * Only unblock the broadcast station (FW blocks it for immediate
3591          * quiet, not the driver)
3592          */
3593         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3594                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3595                                                   &mvmvif->bcast_sta, disable);
3596 }
3597
3598 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3599 {
3600         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3601         struct iwl_mvm_sta *mvmsta;
3602
3603         rcu_read_lock();
3604
3605         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3606
3607         if (!WARN_ON(!mvmsta))
3608                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3609
3610         rcu_read_unlock();
3611 }
3612
3613 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3614 {
3615         u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3616
3617         /*
3618          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
3619          * to align the wrap around of ssn so we compare relevant values.
3620          */
3621         if (mvm->trans->cfg->gen2)
3622                 sn &= 0xff;
3623
3624         return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3625 }