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_queue(struct iwl_mvm *mvm)
1713 {
1714         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1715                                         mvm->cfg->base_params->wd_timeout :
1716                                         IWL_WATCHDOG_DISABLED;
1717
1718         if (iwl_mvm_has_new_tx_api(mvm)) {
1719                 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue,
1720                                                     mvm->aux_sta.sta_id,
1721                                                     IWL_MAX_TID_COUNT,
1722                                                     wdg_timeout);
1723                 mvm->aux_queue = queue;
1724         } else {
1725                 struct iwl_trans_txq_scd_cfg cfg = {
1726                         .fifo = IWL_MVM_TX_FIFO_MCAST,
1727                         .sta_id = mvm->aux_sta.sta_id,
1728                         .tid = IWL_MAX_TID_COUNT,
1729                         .aggregate = false,
1730                         .frame_limit = IWL_FRAME_LIMIT,
1731                 };
1732
1733                 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1734                                    wdg_timeout);
1735         }
1736 }
1737
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_queue(mvm);
1754
1755         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1756                                          MAC_INDEX_AUX, 0);
1757         if (ret) {
1758                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1759                 return ret;
1760         }
1761
1762         /*
1763          * For a000 firmware and on we cannot add queue to a station unknown
1764          * to firmware so enable queue here - after the station was added
1765          */
1766         if (iwl_mvm_has_new_tx_api(mvm))
1767                 iwl_mvm_enable_aux_queue(mvm);
1768
1769         return 0;
1770 }
1771
1772 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1773 {
1774         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1775
1776         lockdep_assert_held(&mvm->mutex);
1777         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1778                                          mvmvif->id, 0);
1779 }
1780
1781 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1782 {
1783         int ret;
1784
1785         lockdep_assert_held(&mvm->mutex);
1786
1787         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1788         if (ret)
1789                 IWL_WARN(mvm, "Failed sending remove station\n");
1790
1791         return ret;
1792 }
1793
1794 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1795 {
1796         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1797 }
1798
1799 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1800 {
1801         lockdep_assert_held(&mvm->mutex);
1802
1803         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1804 }
1805
1806 /*
1807  * Send the add station command for the vif's broadcast station.
1808  * Assumes that the station was already allocated.
1809  *
1810  * @mvm: the mvm component
1811  * @vif: the interface to which the broadcast station is added
1812  * @bsta: the broadcast station to add.
1813  */
1814 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1815 {
1816         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1817         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1818         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1819         const u8 *baddr = _baddr;
1820         int queue;
1821         int ret;
1822         unsigned int wdg_timeout =
1823                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1824         struct iwl_trans_txq_scd_cfg cfg = {
1825                 .fifo = IWL_MVM_TX_FIFO_VO,
1826                 .sta_id = mvmvif->bcast_sta.sta_id,
1827                 .tid = IWL_MAX_TID_COUNT,
1828                 .aggregate = false,
1829                 .frame_limit = IWL_FRAME_LIMIT,
1830         };
1831
1832         lockdep_assert_held(&mvm->mutex);
1833
1834         if (!iwl_mvm_has_new_tx_api(mvm)) {
1835                 if (vif->type == NL80211_IFTYPE_AP ||
1836                     vif->type == NL80211_IFTYPE_ADHOC)
1837                         queue = mvm->probe_queue;
1838                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1839                         queue = mvm->p2p_dev_queue;
1840                 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1841                         return -EINVAL;
1842
1843                 bsta->tfd_queue_msk |= BIT(queue);
1844
1845                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1846                                    &cfg, wdg_timeout);
1847         }
1848
1849         if (vif->type == NL80211_IFTYPE_ADHOC)
1850                 baddr = vif->bss_conf.bssid;
1851
1852         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1853                 return -ENOSPC;
1854
1855         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1856                                          mvmvif->id, mvmvif->color);
1857         if (ret)
1858                 return ret;
1859
1860         /*
1861          * For a000 firmware and on we cannot add queue to a station unknown
1862          * to firmware so enable queue here - after the station was added
1863          */
1864         if (iwl_mvm_has_new_tx_api(mvm)) {
1865                 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1866                                                 bsta->sta_id,
1867                                                 IWL_MAX_TID_COUNT,
1868                                                 wdg_timeout);
1869
1870                 if (vif->type == NL80211_IFTYPE_AP ||
1871                     vif->type == NL80211_IFTYPE_ADHOC)
1872                         mvm->probe_queue = queue;
1873                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1874                         mvm->p2p_dev_queue = queue;
1875         }
1876
1877         return 0;
1878 }
1879
1880 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1881                                           struct ieee80211_vif *vif)
1882 {
1883         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1884         int queue;
1885
1886         lockdep_assert_held(&mvm->mutex);
1887
1888         iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
1889
1890         switch (vif->type) {
1891         case NL80211_IFTYPE_AP:
1892         case NL80211_IFTYPE_ADHOC:
1893                 queue = mvm->probe_queue;
1894                 break;
1895         case NL80211_IFTYPE_P2P_DEVICE:
1896                 queue = mvm->p2p_dev_queue;
1897                 break;
1898         default:
1899                 WARN(1, "Can't free bcast queue on vif type %d\n",
1900                      vif->type);
1901                 return;
1902         }
1903
1904         iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
1905         if (iwl_mvm_has_new_tx_api(mvm))
1906                 return;
1907
1908         WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
1909         mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
1910 }
1911
1912 /* Send the FW a request to remove the station from it's internal data
1913  * structures, but DO NOT remove the entry from the local data structures. */
1914 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1915 {
1916         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1917         int ret;
1918
1919         lockdep_assert_held(&mvm->mutex);
1920
1921         iwl_mvm_free_bcast_sta_queues(mvm, vif);
1922
1923         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1924         if (ret)
1925                 IWL_WARN(mvm, "Failed sending remove station\n");
1926         return ret;
1927 }
1928
1929 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1930 {
1931         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1932
1933         lockdep_assert_held(&mvm->mutex);
1934
1935         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
1936                                         ieee80211_vif_type_p2p(vif),
1937                                         IWL_STA_GENERAL_PURPOSE);
1938 }
1939
1940 /* Allocate a new station entry for the broadcast station to the given vif,
1941  * and send it to the FW.
1942  * Note that each P2P mac should have its own broadcast station.
1943  *
1944  * @mvm: the mvm component
1945  * @vif: the interface to which the broadcast station is added
1946  * @bsta: the broadcast station to add. */
1947 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1948 {
1949         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1950         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1951         int ret;
1952
1953         lockdep_assert_held(&mvm->mutex);
1954
1955         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1956         if (ret)
1957                 return ret;
1958
1959         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1960
1961         if (ret)
1962                 iwl_mvm_dealloc_int_sta(mvm, bsta);
1963
1964         return ret;
1965 }
1966
1967 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1968 {
1969         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1970
1971         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1972 }
1973
1974 /*
1975  * Send the FW a request to remove the station from it's internal data
1976  * structures, and in addition remove it from the local data structure.
1977  */
1978 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1979 {
1980         int ret;
1981
1982         lockdep_assert_held(&mvm->mutex);
1983
1984         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1985
1986         iwl_mvm_dealloc_bcast_sta(mvm, vif);
1987
1988         return ret;
1989 }
1990
1991 /*
1992  * Allocate a new station entry for the multicast station to the given vif,
1993  * and send it to the FW.
1994  * Note that each AP/GO mac should have its own multicast station.
1995  *
1996  * @mvm: the mvm component
1997  * @vif: the interface to which the multicast station is added
1998  */
1999 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2000 {
2001         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2002         struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2003         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2004         const u8 *maddr = _maddr;
2005         struct iwl_trans_txq_scd_cfg cfg = {
2006                 .fifo = IWL_MVM_TX_FIFO_MCAST,
2007                 .sta_id = msta->sta_id,
2008                 .tid = IWL_MAX_TID_COUNT,
2009                 .aggregate = false,
2010                 .frame_limit = IWL_FRAME_LIMIT,
2011         };
2012         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2013         int ret;
2014
2015         lockdep_assert_held(&mvm->mutex);
2016
2017         if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2018                     vif->type != NL80211_IFTYPE_ADHOC))
2019                 return -ENOTSUPP;
2020
2021         /*
2022          * While in previous FWs we had to exclude cab queue from TFD queue
2023          * mask, now it is needed as any other queue.
2024          */
2025         if (!iwl_mvm_has_new_tx_api(mvm) &&
2026             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2027                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2028                                    &cfg, timeout);
2029                 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2030         }
2031         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2032                                          mvmvif->id, mvmvif->color);
2033         if (ret) {
2034                 iwl_mvm_dealloc_int_sta(mvm, msta);
2035                 return ret;
2036         }
2037
2038         /*
2039          * Enable cab queue after the ADD_STA command is sent.
2040          * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2041          * command with unknown station id, and for FW that doesn't support
2042          * station API since the cab queue is not included in the
2043          * tfd_queue_mask.
2044          */
2045         if (iwl_mvm_has_new_tx_api(mvm)) {
2046                 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2047                                                     msta->sta_id,
2048                                                     IWL_MAX_TID_COUNT,
2049                                                     timeout);
2050                 mvmvif->cab_queue = queue;
2051         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2052                                IWL_UCODE_TLV_API_STA_TYPE)) {
2053                 /*
2054                  * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2055                  * invalid, so make sure we use the queue we want.
2056                  * Note that this is done here as we want to avoid making DQA
2057                  * changes in mac80211 layer.
2058                  */
2059                 if (vif->type == NL80211_IFTYPE_ADHOC) {
2060                         vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2061                         mvmvif->cab_queue = vif->cab_queue;
2062                 }
2063                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2064                                    &cfg, timeout);
2065         }
2066
2067         return 0;
2068 }
2069
2070 /*
2071  * Send the FW a request to remove the station from it's internal data
2072  * structures, and in addition remove it from the local data structure.
2073  */
2074 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2075 {
2076         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2077         int ret;
2078
2079         lockdep_assert_held(&mvm->mutex);
2080
2081         iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2082
2083         iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2084                             IWL_MAX_TID_COUNT, 0);
2085
2086         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2087         if (ret)
2088                 IWL_WARN(mvm, "Failed sending remove station\n");
2089
2090         return ret;
2091 }
2092
2093 #define IWL_MAX_RX_BA_SESSIONS 16
2094
2095 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2096 {
2097         struct iwl_mvm_delba_notif notif = {
2098                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2099                 .metadata.sync = 1,
2100                 .delba.baid = baid,
2101         };
2102         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2103 };
2104
2105 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2106                                  struct iwl_mvm_baid_data *data)
2107 {
2108         int i;
2109
2110         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2111
2112         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2113                 int j;
2114                 struct iwl_mvm_reorder_buffer *reorder_buf =
2115                         &data->reorder_buf[i];
2116                 struct iwl_mvm_reorder_buf_entry *entries =
2117                         &data->entries[i * data->entries_per_queue];
2118
2119                 spin_lock_bh(&reorder_buf->lock);
2120                 if (likely(!reorder_buf->num_stored)) {
2121                         spin_unlock_bh(&reorder_buf->lock);
2122                         continue;
2123                 }
2124
2125                 /*
2126                  * This shouldn't happen in regular DELBA since the internal
2127                  * delBA notification should trigger a release of all frames in
2128                  * the reorder buffer.
2129                  */
2130                 WARN_ON(1);
2131
2132                 for (j = 0; j < reorder_buf->buf_size; j++)
2133                         __skb_queue_purge(&entries[j].e.frames);
2134                 /*
2135                  * Prevent timer re-arm. This prevents a very far fetched case
2136                  * where we timed out on the notification. There may be prior
2137                  * RX frames pending in the RX queue before the notification
2138                  * that might get processed between now and the actual deletion
2139                  * and we would re-arm the timer although we are deleting the
2140                  * reorder buffer.
2141                  */
2142                 reorder_buf->removed = true;
2143                 spin_unlock_bh(&reorder_buf->lock);
2144                 del_timer_sync(&reorder_buf->reorder_timer);
2145         }
2146 }
2147
2148 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2149                                         struct iwl_mvm_baid_data *data,
2150                                         u16 ssn, u8 buf_size)
2151 {
2152         int i;
2153
2154         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2155                 struct iwl_mvm_reorder_buffer *reorder_buf =
2156                         &data->reorder_buf[i];
2157                 struct iwl_mvm_reorder_buf_entry *entries =
2158                         &data->entries[i * data->entries_per_queue];
2159                 int j;
2160
2161                 reorder_buf->num_stored = 0;
2162                 reorder_buf->head_sn = ssn;
2163                 reorder_buf->buf_size = buf_size;
2164                 /* rx reorder timer */
2165                 timer_setup(&reorder_buf->reorder_timer,
2166                             iwl_mvm_reorder_timer_expired, 0);
2167                 spin_lock_init(&reorder_buf->lock);
2168                 reorder_buf->mvm = mvm;
2169                 reorder_buf->queue = i;
2170                 reorder_buf->valid = false;
2171                 for (j = 0; j < reorder_buf->buf_size; j++)
2172                         __skb_queue_head_init(&entries[j].e.frames);
2173         }
2174 }
2175
2176 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2177                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2178 {
2179         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2180         struct iwl_mvm_add_sta_cmd cmd = {};
2181         struct iwl_mvm_baid_data *baid_data = NULL;
2182         int ret;
2183         u32 status;
2184
2185         lockdep_assert_held(&mvm->mutex);
2186
2187         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2188                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2189                 return -ENOSPC;
2190         }
2191
2192         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2193                 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2194
2195                 /* sparse doesn't like the __align() so don't check */
2196 #ifndef __CHECKER__
2197                 /*
2198                  * The division below will be OK if either the cache line size
2199                  * can be divided by the entry size (ALIGN will round up) or if
2200                  * if the entry size can be divided by the cache line size, in
2201                  * which case the ALIGN() will do nothing.
2202                  */
2203                 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2204                              sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2205 #endif
2206
2207                 /*
2208                  * Upward align the reorder buffer size to fill an entire cache
2209                  * line for each queue, to avoid sharing cache lines between
2210                  * different queues.
2211                  */
2212                 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2213
2214                 /*
2215                  * Allocate here so if allocation fails we can bail out early
2216                  * before starting the BA session in the firmware
2217                  */
2218                 baid_data = kzalloc(sizeof(*baid_data) +
2219                                     mvm->trans->num_rx_queues *
2220                                     reorder_buf_size,
2221                                     GFP_KERNEL);
2222                 if (!baid_data)
2223                         return -ENOMEM;
2224
2225                 /*
2226                  * This division is why we need the above BUILD_BUG_ON(),
2227                  * if that doesn't hold then this will not be right.
2228                  */
2229                 baid_data->entries_per_queue =
2230                         reorder_buf_size / sizeof(baid_data->entries[0]);
2231         }
2232
2233         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2234         cmd.sta_id = mvm_sta->sta_id;
2235         cmd.add_modify = STA_MODE_MODIFY;
2236         if (start) {
2237                 cmd.add_immediate_ba_tid = (u8) tid;
2238                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2239                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2240         } else {
2241                 cmd.remove_immediate_ba_tid = (u8) tid;
2242         }
2243         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2244                                   STA_MODIFY_REMOVE_BA_TID;
2245
2246         status = ADD_STA_SUCCESS;
2247         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2248                                           iwl_mvm_add_sta_cmd_size(mvm),
2249                                           &cmd, &status);
2250         if (ret)
2251                 goto out_free;
2252
2253         switch (status & IWL_ADD_STA_STATUS_MASK) {
2254         case ADD_STA_SUCCESS:
2255                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2256                              start ? "start" : "stopp");
2257                 break;
2258         case ADD_STA_IMMEDIATE_BA_FAILURE:
2259                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2260                 ret = -ENOSPC;
2261                 break;
2262         default:
2263                 ret = -EIO;
2264                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2265                         start ? "start" : "stopp", status);
2266                 break;
2267         }
2268
2269         if (ret)
2270                 goto out_free;
2271
2272         if (start) {
2273                 u8 baid;
2274
2275                 mvm->rx_ba_sessions++;
2276
2277                 if (!iwl_mvm_has_new_rx_api(mvm))
2278                         return 0;
2279
2280                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2281                         ret = -EINVAL;
2282                         goto out_free;
2283                 }
2284                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2285                             IWL_ADD_STA_BAID_SHIFT);
2286                 baid_data->baid = baid;
2287                 baid_data->timeout = timeout;
2288                 baid_data->last_rx = jiffies;
2289                 baid_data->rcu_ptr = &mvm->baid_map[baid];
2290                 timer_setup(&baid_data->session_timer,
2291                             iwl_mvm_rx_agg_session_expired, 0);
2292                 baid_data->mvm = mvm;
2293                 baid_data->tid = tid;
2294                 baid_data->sta_id = mvm_sta->sta_id;
2295
2296                 mvm_sta->tid_to_baid[tid] = baid;
2297                 if (timeout)
2298                         mod_timer(&baid_data->session_timer,
2299                                   TU_TO_EXP_TIME(timeout * 2));
2300
2301                 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2302                 /*
2303                  * protect the BA data with RCU to cover a case where our
2304                  * internal RX sync mechanism will timeout (not that it's
2305                  * supposed to happen) and we will free the session data while
2306                  * RX is being processed in parallel
2307                  */
2308                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2309                              mvm_sta->sta_id, tid, baid);
2310                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2311                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2312         } else  {
2313                 u8 baid = mvm_sta->tid_to_baid[tid];
2314
2315                 if (mvm->rx_ba_sessions > 0)
2316                         /* check that restart flow didn't zero the counter */
2317                         mvm->rx_ba_sessions--;
2318                 if (!iwl_mvm_has_new_rx_api(mvm))
2319                         return 0;
2320
2321                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2322                         return -EINVAL;
2323
2324                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2325                 if (WARN_ON(!baid_data))
2326                         return -EINVAL;
2327
2328                 /* synchronize all rx queues so we can safely delete */
2329                 iwl_mvm_free_reorder(mvm, baid_data);
2330                 del_timer_sync(&baid_data->session_timer);
2331                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2332                 kfree_rcu(baid_data, rcu_head);
2333                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2334         }
2335         return 0;
2336
2337 out_free:
2338         kfree(baid_data);
2339         return ret;
2340 }
2341
2342 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2343                        int tid, u8 queue, bool start)
2344 {
2345         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2346         struct iwl_mvm_add_sta_cmd cmd = {};
2347         int ret;
2348         u32 status;
2349
2350         lockdep_assert_held(&mvm->mutex);
2351
2352         if (start) {
2353                 mvm_sta->tfd_queue_msk |= BIT(queue);
2354                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2355         } else {
2356                 /* In DQA-mode the queue isn't removed on agg termination */
2357                 mvm_sta->tid_disable_agg |= BIT(tid);
2358         }
2359
2360         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2361         cmd.sta_id = mvm_sta->sta_id;
2362         cmd.add_modify = STA_MODE_MODIFY;
2363         if (!iwl_mvm_has_new_tx_api(mvm))
2364                 cmd.modify_mask = STA_MODIFY_QUEUES;
2365         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2366         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2367         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2368
2369         status = ADD_STA_SUCCESS;
2370         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2371                                           iwl_mvm_add_sta_cmd_size(mvm),
2372                                           &cmd, &status);
2373         if (ret)
2374                 return ret;
2375
2376         switch (status & IWL_ADD_STA_STATUS_MASK) {
2377         case ADD_STA_SUCCESS:
2378                 break;
2379         default:
2380                 ret = -EIO;
2381                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2382                         start ? "start" : "stopp", status);
2383                 break;
2384         }
2385
2386         return ret;
2387 }
2388
2389 const u8 tid_to_mac80211_ac[] = {
2390         IEEE80211_AC_BE,
2391         IEEE80211_AC_BK,
2392         IEEE80211_AC_BK,
2393         IEEE80211_AC_BE,
2394         IEEE80211_AC_VI,
2395         IEEE80211_AC_VI,
2396         IEEE80211_AC_VO,
2397         IEEE80211_AC_VO,
2398         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2399 };
2400
2401 static const u8 tid_to_ucode_ac[] = {
2402         AC_BE,
2403         AC_BK,
2404         AC_BK,
2405         AC_BE,
2406         AC_VI,
2407         AC_VI,
2408         AC_VO,
2409         AC_VO,
2410 };
2411
2412 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2413                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2414 {
2415         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2416         struct iwl_mvm_tid_data *tid_data;
2417         u16 normalized_ssn;
2418         int txq_id;
2419         int ret;
2420
2421         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2422                 return -EINVAL;
2423
2424         if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2425             mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2426                 IWL_ERR(mvm,
2427                         "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2428                         mvmsta->tid_data[tid].state);
2429                 return -ENXIO;
2430         }
2431
2432         lockdep_assert_held(&mvm->mutex);
2433
2434         spin_lock_bh(&mvmsta->lock);
2435
2436         /* possible race condition - we entered D0i3 while starting agg */
2437         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2438                 spin_unlock_bh(&mvmsta->lock);
2439                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2440                 return -EIO;
2441         }
2442
2443         spin_lock(&mvm->queue_info_lock);
2444
2445         /*
2446          * Note the possible cases:
2447          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2448          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2449          *      one and mark it as reserved
2450          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2451          *      non-DQA mode, since the TXQ hasn't yet been allocated
2452          * Don't support case 3 for new TX path as it is not expected to happen
2453          * and aggregation will be offloaded soon anyway
2454          */
2455         txq_id = mvmsta->tid_data[tid].txq_id;
2456         if (iwl_mvm_has_new_tx_api(mvm)) {
2457                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2458                         ret = -ENXIO;
2459                         goto release_locks;
2460                 }
2461         } else if (unlikely(mvm->queue_info[txq_id].status ==
2462                             IWL_MVM_QUEUE_SHARED)) {
2463                 ret = -ENXIO;
2464                 IWL_DEBUG_TX_QUEUES(mvm,
2465                                     "Can't start tid %d agg on shared queue!\n",
2466                                     tid);
2467                 goto release_locks;
2468         } else if (mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2469                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2470                                                  IWL_MVM_DQA_MIN_DATA_QUEUE,
2471                                                  IWL_MVM_DQA_MAX_DATA_QUEUE);
2472                 if (txq_id < 0) {
2473                         ret = txq_id;
2474                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2475                         goto release_locks;
2476                 }
2477                 /*
2478                  * TXQ shouldn't be in inactive mode for non-DQA, so getting
2479                  * an inactive queue from iwl_mvm_find_free_queue() is
2480                  * certainly a bug
2481                  */
2482                 WARN_ON(mvm->queue_info[txq_id].status ==
2483                         IWL_MVM_QUEUE_INACTIVE);
2484
2485                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2486                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2487         }
2488
2489         spin_unlock(&mvm->queue_info_lock);
2490
2491         IWL_DEBUG_TX_QUEUES(mvm,
2492                             "AGG for tid %d will be on queue #%d\n",
2493                             tid, txq_id);
2494
2495         tid_data = &mvmsta->tid_data[tid];
2496         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2497         tid_data->txq_id = txq_id;
2498         *ssn = tid_data->ssn;
2499
2500         IWL_DEBUG_TX_QUEUES(mvm,
2501                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2502                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2503                             tid_data->next_reclaimed);
2504
2505         /*
2506          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
2507          * to align the wrap around of ssn so we compare relevant values.
2508          */
2509         normalized_ssn = tid_data->ssn;
2510         if (mvm->trans->cfg->gen2)
2511                 normalized_ssn &= 0xff;
2512
2513         if (normalized_ssn == tid_data->next_reclaimed) {
2514                 tid_data->state = IWL_AGG_STARTING;
2515                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2516         } else {
2517                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2518         }
2519
2520         ret = 0;
2521         goto out;
2522
2523 release_locks:
2524         spin_unlock(&mvm->queue_info_lock);
2525 out:
2526         spin_unlock_bh(&mvmsta->lock);
2527
2528         return ret;
2529 }
2530
2531 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2532                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2533                             bool amsdu)
2534 {
2535         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2536         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2537         unsigned int wdg_timeout =
2538                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2539         int queue, ret;
2540         bool alloc_queue = true;
2541         enum iwl_mvm_queue_status queue_status;
2542         u16 ssn;
2543
2544         struct iwl_trans_txq_scd_cfg cfg = {
2545                 .sta_id = mvmsta->sta_id,
2546                 .tid = tid,
2547                 .frame_limit = buf_size,
2548                 .aggregate = true,
2549         };
2550
2551         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2552                      != IWL_MAX_TID_COUNT);
2553
2554         spin_lock_bh(&mvmsta->lock);
2555         ssn = tid_data->ssn;
2556         queue = tid_data->txq_id;
2557         tid_data->state = IWL_AGG_ON;
2558         mvmsta->agg_tids |= BIT(tid);
2559         tid_data->ssn = 0xffff;
2560         tid_data->amsdu_in_ampdu_allowed = amsdu;
2561         spin_unlock_bh(&mvmsta->lock);
2562
2563         if (iwl_mvm_has_new_tx_api(mvm)) {
2564                 /*
2565                  * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2566                  * would have failed, so if we are here there is no need to
2567                  * allocate a queue.
2568                  * However, if aggregation size is different than the default
2569                  * size, the scheduler should be reconfigured.
2570                  * We cannot do this with the new TX API, so return unsupported
2571                  * for now, until it will be offloaded to firmware..
2572                  * Note that if SCD default value changes - this condition
2573                  * should be updated as well.
2574                  */
2575                 if (buf_size < IWL_FRAME_LIMIT)
2576                         return -ENOTSUPP;
2577
2578                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2579                 if (ret)
2580                         return -EIO;
2581                 goto out;
2582         }
2583
2584         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2585
2586         spin_lock_bh(&mvm->queue_info_lock);
2587         queue_status = mvm->queue_info[queue].status;
2588         spin_unlock_bh(&mvm->queue_info_lock);
2589
2590         /* Maybe there is no need to even alloc a queue... */
2591         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2592                 alloc_queue = false;
2593
2594         /*
2595          * Only reconfig the SCD for the queue if the window size has
2596          * changed from current (become smaller)
2597          */
2598         if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2599                 /*
2600                  * If reconfiguring an existing queue, it first must be
2601                  * drained
2602                  */
2603                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2604                                                      BIT(queue));
2605                 if (ret) {
2606                         IWL_ERR(mvm,
2607                                 "Error draining queue before reconfig\n");
2608                         return ret;
2609                 }
2610
2611                 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2612                                            mvmsta->sta_id, tid,
2613                                            buf_size, ssn);
2614                 if (ret) {
2615                         IWL_ERR(mvm,
2616                                 "Error reconfiguring TXQ #%d\n", queue);
2617                         return ret;
2618                 }
2619         }
2620
2621         if (alloc_queue)
2622                 iwl_mvm_enable_txq(mvm, queue,
2623                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2624                                    &cfg, wdg_timeout);
2625
2626         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2627         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2628                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2629                 if (ret)
2630                         return -EIO;
2631         }
2632
2633         /* No need to mark as reserved */
2634         spin_lock_bh(&mvm->queue_info_lock);
2635         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2636         spin_unlock_bh(&mvm->queue_info_lock);
2637
2638 out:
2639         /*
2640          * Even though in theory the peer could have different
2641          * aggregation reorder buffer sizes for different sessions,
2642          * our ucode doesn't allow for that and has a global limit
2643          * for each station. Therefore, use the minimum of all the
2644          * aggregation sessions and our default value.
2645          */
2646         mvmsta->max_agg_bufsize =
2647                 min(mvmsta->max_agg_bufsize, buf_size);
2648         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2649
2650         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2651                      sta->addr, tid);
2652
2653         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2654 }
2655
2656 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2657                                         struct iwl_mvm_sta *mvmsta,
2658                                         u16 txq_id)
2659 {
2660         if (iwl_mvm_has_new_tx_api(mvm))
2661                 return;
2662
2663         spin_lock_bh(&mvm->queue_info_lock);
2664         /*
2665          * The TXQ is marked as reserved only if no traffic came through yet
2666          * This means no traffic has been sent on this TID (agg'd or not), so
2667          * we no longer have use for the queue. Since it hasn't even been
2668          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2669          * free.
2670          */
2671         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2672                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2673
2674         spin_unlock_bh(&mvm->queue_info_lock);
2675 }
2676
2677 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2678                             struct ieee80211_sta *sta, u16 tid)
2679 {
2680         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2681         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2682         u16 txq_id;
2683         int err;
2684
2685         /*
2686          * If mac80211 is cleaning its state, then say that we finished since
2687          * our state has been cleared anyway.
2688          */
2689         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2690                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2691                 return 0;
2692         }
2693
2694         spin_lock_bh(&mvmsta->lock);
2695
2696         txq_id = tid_data->txq_id;
2697
2698         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2699                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2700
2701         mvmsta->agg_tids &= ~BIT(tid);
2702
2703         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2704
2705         switch (tid_data->state) {
2706         case IWL_AGG_ON:
2707                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2708
2709                 IWL_DEBUG_TX_QUEUES(mvm,
2710                                     "ssn = %d, next_recl = %d\n",
2711                                     tid_data->ssn, tid_data->next_reclaimed);
2712
2713                 tid_data->ssn = 0xffff;
2714                 tid_data->state = IWL_AGG_OFF;
2715                 spin_unlock_bh(&mvmsta->lock);
2716
2717                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2718
2719                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2720                 return 0;
2721         case IWL_AGG_STARTING:
2722         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2723                 /*
2724                  * The agg session has been stopped before it was set up. This
2725                  * can happen when the AddBA timer times out for example.
2726                  */
2727
2728                 /* No barriers since we are under mutex */
2729                 lockdep_assert_held(&mvm->mutex);
2730
2731                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2732                 tid_data->state = IWL_AGG_OFF;
2733                 err = 0;
2734                 break;
2735         default:
2736                 IWL_ERR(mvm,
2737                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2738                         mvmsta->sta_id, tid, tid_data->state);
2739                 IWL_ERR(mvm,
2740                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2741                 err = -EINVAL;
2742         }
2743
2744         spin_unlock_bh(&mvmsta->lock);
2745
2746         return err;
2747 }
2748
2749 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2750                             struct ieee80211_sta *sta, u16 tid)
2751 {
2752         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2753         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2754         u16 txq_id;
2755         enum iwl_mvm_agg_state old_state;
2756
2757         /*
2758          * First set the agg state to OFF to avoid calling
2759          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2760          */
2761         spin_lock_bh(&mvmsta->lock);
2762         txq_id = tid_data->txq_id;
2763         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2764                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2765         old_state = tid_data->state;
2766         tid_data->state = IWL_AGG_OFF;
2767         mvmsta->agg_tids &= ~BIT(tid);
2768         spin_unlock_bh(&mvmsta->lock);
2769
2770         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2771
2772         if (old_state >= IWL_AGG_ON) {
2773                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2774
2775                 if (iwl_mvm_has_new_tx_api(mvm)) {
2776                         if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2777                                                    BIT(tid), 0))
2778                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2779                         iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2780                 } else {
2781                         if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2782                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2783                         iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2784                 }
2785
2786                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2787
2788                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2789         }
2790
2791         return 0;
2792 }
2793
2794 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2795 {
2796         int i, max = -1, max_offs = -1;
2797
2798         lockdep_assert_held(&mvm->mutex);
2799
2800         /* Pick the unused key offset with the highest 'deleted'
2801          * counter. Every time a key is deleted, all the counters
2802          * are incremented and the one that was just deleted is
2803          * reset to zero. Thus, the highest counter is the one
2804          * that was deleted longest ago. Pick that one.
2805          */
2806         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2807                 if (test_bit(i, mvm->fw_key_table))
2808                         continue;
2809                 if (mvm->fw_key_deleted[i] > max) {
2810                         max = mvm->fw_key_deleted[i];
2811                         max_offs = i;
2812                 }
2813         }
2814
2815         if (max_offs < 0)
2816                 return STA_KEY_IDX_INVALID;
2817
2818         return max_offs;
2819 }
2820
2821 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2822                                                struct ieee80211_vif *vif,
2823                                                struct ieee80211_sta *sta)
2824 {
2825         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2826
2827         if (sta)
2828                 return iwl_mvm_sta_from_mac80211(sta);
2829
2830         /*
2831          * The device expects GTKs for station interfaces to be
2832          * installed as GTKs for the AP station. If we have no
2833          * station ID, then use AP's station ID.
2834          */
2835         if (vif->type == NL80211_IFTYPE_STATION &&
2836             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2837                 u8 sta_id = mvmvif->ap_sta_id;
2838
2839                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2840                                             lockdep_is_held(&mvm->mutex));
2841
2842                 /*
2843                  * It is possible that the 'sta' parameter is NULL,
2844                  * for example when a GTK is removed - the sta_id will then
2845                  * be the AP ID, and no station was passed by mac80211.
2846                  */
2847                 if (IS_ERR_OR_NULL(sta))
2848                         return NULL;
2849
2850                 return iwl_mvm_sta_from_mac80211(sta);
2851         }
2852
2853         return NULL;
2854 }
2855
2856 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2857                                 u32 sta_id,
2858                                 struct ieee80211_key_conf *key, bool mcast,
2859                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2860                                 u8 key_offset)
2861 {
2862         union {
2863                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2864                 struct iwl_mvm_add_sta_key_cmd cmd;
2865         } u = {};
2866         __le16 key_flags;
2867         int ret;
2868         u32 status;
2869         u16 keyidx;
2870         u64 pn = 0;
2871         int i, size;
2872         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2873                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2874
2875         if (sta_id == IWL_MVM_INVALID_STA)
2876                 return -EINVAL;
2877
2878         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2879                  STA_KEY_FLG_KEYID_MSK;
2880         key_flags = cpu_to_le16(keyidx);
2881         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2882
2883         switch (key->cipher) {
2884         case WLAN_CIPHER_SUITE_TKIP:
2885                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2886                 if (new_api) {
2887                         memcpy((void *)&u.cmd.tx_mic_key,
2888                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2889                                IWL_MIC_KEY_SIZE);
2890
2891                         memcpy((void *)&u.cmd.rx_mic_key,
2892                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2893                                IWL_MIC_KEY_SIZE);
2894                         pn = atomic64_read(&key->tx_pn);
2895
2896                 } else {
2897                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2898                         for (i = 0; i < 5; i++)
2899                                 u.cmd_v1.tkip_rx_ttak[i] =
2900                                         cpu_to_le16(tkip_p1k[i]);
2901                 }
2902                 memcpy(u.cmd.common.key, key->key, key->keylen);
2903                 break;
2904         case WLAN_CIPHER_SUITE_CCMP:
2905                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2906                 memcpy(u.cmd.common.key, key->key, key->keylen);
2907                 if (new_api)
2908                         pn = atomic64_read(&key->tx_pn);
2909                 break;
2910         case WLAN_CIPHER_SUITE_WEP104:
2911                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2912                 /* fall through */
2913         case WLAN_CIPHER_SUITE_WEP40:
2914                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2915                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2916                 break;
2917         case WLAN_CIPHER_SUITE_GCMP_256:
2918                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2919                 /* fall through */
2920         case WLAN_CIPHER_SUITE_GCMP:
2921                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2922                 memcpy(u.cmd.common.key, key->key, key->keylen);
2923                 if (new_api)
2924                         pn = atomic64_read(&key->tx_pn);
2925                 break;
2926         default:
2927                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2928                 memcpy(u.cmd.common.key, key->key, key->keylen);
2929         }
2930
2931         if (mcast)
2932                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2933
2934         u.cmd.common.key_offset = key_offset;
2935         u.cmd.common.key_flags = key_flags;
2936         u.cmd.common.sta_id = sta_id;
2937
2938         if (new_api) {
2939                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
2940                 size = sizeof(u.cmd);
2941         } else {
2942                 size = sizeof(u.cmd_v1);
2943         }
2944
2945         status = ADD_STA_SUCCESS;
2946         if (cmd_flags & CMD_ASYNC)
2947                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
2948                                            &u.cmd);
2949         else
2950                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
2951                                                   &u.cmd, &status);
2952
2953         switch (status) {
2954         case ADD_STA_SUCCESS:
2955                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2956                 break;
2957         default:
2958                 ret = -EIO;
2959                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
2960                 break;
2961         }
2962
2963         return ret;
2964 }
2965
2966 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
2967                                  struct ieee80211_key_conf *keyconf,
2968                                  u8 sta_id, bool remove_key)
2969 {
2970         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
2971
2972         /* verify the key details match the required command's expectations */
2973         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
2974                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
2975                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
2976                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
2977                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
2978                 return -EINVAL;
2979
2980         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
2981                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
2982                 return -EINVAL;
2983
2984         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
2985         igtk_cmd.sta_id = cpu_to_le32(sta_id);
2986
2987         if (remove_key) {
2988                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
2989         } else {
2990                 struct ieee80211_key_seq seq;
2991                 const u8 *pn;
2992
2993                 switch (keyconf->cipher) {
2994                 case WLAN_CIPHER_SUITE_AES_CMAC:
2995                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
2996                         break;
2997                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2998                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2999                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3000                         break;
3001                 default:
3002                         return -EINVAL;
3003                 }
3004
3005                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3006                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3007                         igtk_cmd.ctrl_flags |=
3008                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3009                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3010                 pn = seq.aes_cmac.pn;
3011                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3012                                                        ((u64) pn[4] << 8) |
3013                                                        ((u64) pn[3] << 16) |
3014                                                        ((u64) pn[2] << 24) |
3015                                                        ((u64) pn[1] << 32) |
3016                                                        ((u64) pn[0] << 40));
3017         }
3018
3019         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3020                        remove_key ? "removing" : "installing",
3021                        igtk_cmd.sta_id);
3022
3023         if (!iwl_mvm_has_new_rx_api(mvm)) {
3024                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3025                         .ctrl_flags = igtk_cmd.ctrl_flags,
3026                         .key_id = igtk_cmd.key_id,
3027                         .sta_id = igtk_cmd.sta_id,
3028                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3029                 };
3030
3031                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3032                        ARRAY_SIZE(igtk_cmd_v1.igtk));
3033                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3034                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3035         }
3036         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3037                                     sizeof(igtk_cmd), &igtk_cmd);
3038 }
3039
3040
3041 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3042                                        struct ieee80211_vif *vif,
3043                                        struct ieee80211_sta *sta)
3044 {
3045         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3046
3047         if (sta)
3048                 return sta->addr;
3049
3050         if (vif->type == NL80211_IFTYPE_STATION &&
3051             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3052                 u8 sta_id = mvmvif->ap_sta_id;
3053                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3054                                                 lockdep_is_held(&mvm->mutex));
3055                 return sta->addr;
3056         }
3057
3058
3059         return NULL;
3060 }
3061
3062 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3063                                  struct ieee80211_vif *vif,
3064                                  struct ieee80211_sta *sta,
3065                                  struct ieee80211_key_conf *keyconf,
3066                                  u8 key_offset,
3067                                  bool mcast)
3068 {
3069         int ret;
3070         const u8 *addr;
3071         struct ieee80211_key_seq seq;
3072         u16 p1k[5];
3073         u32 sta_id;
3074
3075         if (sta) {
3076                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3077
3078                 sta_id = mvm_sta->sta_id;
3079         } else if (vif->type == NL80211_IFTYPE_AP &&
3080                    !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3081                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3082
3083                 sta_id = mvmvif->mcast_sta.sta_id;
3084         } else {
3085                 IWL_ERR(mvm, "Failed to find station id\n");
3086                 return -EINVAL;
3087         }
3088
3089         switch (keyconf->cipher) {
3090         case WLAN_CIPHER_SUITE_TKIP:
3091                 if (vif->type == NL80211_IFTYPE_AP) {
3092                         ret = -EINVAL;
3093                         break;
3094                 }
3095                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3096                 /* get phase 1 key from mac80211 */
3097                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3098                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3099                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3100                                            seq.tkip.iv32, p1k, 0, key_offset);
3101                 break;
3102         case WLAN_CIPHER_SUITE_CCMP:
3103         case WLAN_CIPHER_SUITE_WEP40:
3104         case WLAN_CIPHER_SUITE_WEP104:
3105         case WLAN_CIPHER_SUITE_GCMP:
3106         case WLAN_CIPHER_SUITE_GCMP_256:
3107                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3108                                            0, NULL, 0, key_offset);
3109                 break;
3110         default:
3111                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3112                                            0, NULL, 0, key_offset);
3113         }
3114
3115         return ret;
3116 }
3117
3118 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3119                                     struct ieee80211_key_conf *keyconf,
3120                                     bool mcast)
3121 {
3122         union {
3123                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3124                 struct iwl_mvm_add_sta_key_cmd cmd;
3125         } u = {};
3126         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3127                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3128         __le16 key_flags;
3129         int ret, size;
3130         u32 status;
3131
3132         if (sta_id == IWL_MVM_INVALID_STA)
3133                 return -EINVAL;
3134
3135         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3136                                  STA_KEY_FLG_KEYID_MSK);
3137         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3138         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3139
3140         if (mcast)
3141                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3142
3143         /*
3144          * The fields assigned here are in the same location at the start
3145          * of the command, so we can do this union trick.
3146          */
3147         u.cmd.common.key_flags = key_flags;
3148         u.cmd.common.key_offset = keyconf->hw_key_idx;
3149         u.cmd.common.sta_id = sta_id;
3150
3151         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3152
3153         status = ADD_STA_SUCCESS;
3154         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3155                                           &status);
3156
3157         switch (status) {
3158         case ADD_STA_SUCCESS:
3159                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3160                 break;
3161         default:
3162                 ret = -EIO;
3163                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3164                 break;
3165         }
3166
3167         return ret;
3168 }
3169
3170 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3171                         struct ieee80211_vif *vif,
3172                         struct ieee80211_sta *sta,
3173                         struct ieee80211_key_conf *keyconf,
3174                         u8 key_offset)
3175 {
3176         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3177         struct iwl_mvm_sta *mvm_sta;
3178         u8 sta_id = IWL_MVM_INVALID_STA;
3179         int ret;
3180         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3181
3182         lockdep_assert_held(&mvm->mutex);
3183
3184         if (vif->type != NL80211_IFTYPE_AP ||
3185             keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3186                 /* Get the station id from the mvm local station table */
3187                 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3188                 if (!mvm_sta) {
3189                         IWL_ERR(mvm, "Failed to find station\n");
3190                         return -EINVAL;
3191                 }
3192                 sta_id = mvm_sta->sta_id;
3193
3194                 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3195                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3196                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3197                         ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id,
3198                                                     false);
3199                         goto end;
3200                 }
3201
3202                 /*
3203                  * It is possible that the 'sta' parameter is NULL, and thus
3204                  * there is a need to retrieve  the sta from the local station
3205                  * table.
3206                  */
3207                 if (!sta) {
3208                         sta = rcu_dereference_protected(
3209                                 mvm->fw_id_to_mac_id[sta_id],
3210                                 lockdep_is_held(&mvm->mutex));
3211                         if (IS_ERR_OR_NULL(sta)) {
3212                                 IWL_ERR(mvm, "Invalid station id\n");
3213                                 return -EINVAL;
3214                         }
3215                 }
3216
3217                 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3218                         return -EINVAL;
3219         }
3220
3221         /* If the key_offset is not pre-assigned, we need to find a
3222          * new offset to use.  In normal cases, the offset is not
3223          * pre-assigned, but during HW_RESTART we want to reuse the
3224          * same indices, so we pass them when this function is called.
3225          *
3226          * In D3 entry, we need to hardcoded the indices (because the
3227          * firmware hardcodes the PTK offset to 0).  In this case, we
3228          * need to make sure we don't overwrite the hw_key_idx in the
3229          * keyconf structure, because otherwise we cannot configure
3230          * the original ones back when resuming.
3231          */
3232         if (key_offset == STA_KEY_IDX_INVALID) {
3233                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3234                 if (key_offset == STA_KEY_IDX_INVALID)
3235                         return -ENOSPC;
3236                 keyconf->hw_key_idx = key_offset;
3237         }
3238
3239         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3240         if (ret)
3241                 goto end;
3242
3243         /*
3244          * For WEP, the same key is used for multicast and unicast. Upload it
3245          * again, using the same key offset, and now pointing the other one
3246          * to the same key slot (offset).
3247          * If this fails, remove the original as well.
3248          */
3249         if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3250              keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3251             sta) {
3252                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3253                                             key_offset, !mcast);
3254                 if (ret) {
3255                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3256                         goto end;
3257                 }
3258         }
3259
3260         __set_bit(key_offset, mvm->fw_key_table);
3261
3262 end:
3263         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3264                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3265                       sta ? sta->addr : zero_addr, ret);
3266         return ret;
3267 }
3268
3269 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3270                            struct ieee80211_vif *vif,
3271                            struct ieee80211_sta *sta,
3272                            struct ieee80211_key_conf *keyconf)
3273 {
3274         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3275         struct iwl_mvm_sta *mvm_sta;
3276         u8 sta_id = IWL_MVM_INVALID_STA;
3277         int ret, i;
3278
3279         lockdep_assert_held(&mvm->mutex);
3280
3281         /* Get the station from the mvm local station table */
3282         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3283         if (mvm_sta)
3284                 sta_id = mvm_sta->sta_id;
3285         else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3286                 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3287
3288
3289         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3290                       keyconf->keyidx, sta_id);
3291
3292         if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3293                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3294                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3295                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3296
3297         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3298                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3299                         keyconf->hw_key_idx);
3300                 return -ENOENT;
3301         }
3302
3303         /* track which key was deleted last */
3304         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3305                 if (mvm->fw_key_deleted[i] < U8_MAX)
3306                         mvm->fw_key_deleted[i]++;
3307         }
3308         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3309
3310         if (sta && !mvm_sta) {
3311                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3312                 return 0;
3313         }
3314
3315         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3316         if (ret)
3317                 return ret;
3318
3319         /* delete WEP key twice to get rid of (now useless) offset */
3320         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3321             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3322                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3323
3324         return ret;
3325 }
3326
3327 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3328                              struct ieee80211_vif *vif,
3329                              struct ieee80211_key_conf *keyconf,
3330                              struct ieee80211_sta *sta, u32 iv32,
3331                              u16 *phase1key)
3332 {
3333         struct iwl_mvm_sta *mvm_sta;
3334         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3335
3336         rcu_read_lock();
3337
3338         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3339         if (WARN_ON_ONCE(!mvm_sta))
3340                 goto unlock;
3341         iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3342                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3343
3344  unlock:
3345         rcu_read_unlock();
3346 }
3347
3348 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3349                                 struct ieee80211_sta *sta)
3350 {
3351         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3352         struct iwl_mvm_add_sta_cmd cmd = {
3353                 .add_modify = STA_MODE_MODIFY,
3354                 .sta_id = mvmsta->sta_id,
3355                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3356                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3357         };
3358         int ret;
3359
3360         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3361                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3362         if (ret)
3363                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3364 }
3365
3366 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3367                                        struct ieee80211_sta *sta,
3368                                        enum ieee80211_frame_release_type reason,
3369                                        u16 cnt, u16 tids, bool more_data,
3370                                        bool single_sta_queue)
3371 {
3372         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3373         struct iwl_mvm_add_sta_cmd cmd = {
3374                 .add_modify = STA_MODE_MODIFY,
3375                 .sta_id = mvmsta->sta_id,
3376                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3377                 .sleep_tx_count = cpu_to_le16(cnt),
3378                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3379         };
3380         int tid, ret;
3381         unsigned long _tids = tids;
3382
3383         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3384          * Note that this field is reserved and unused by firmware not
3385          * supporting GO uAPSD, so it's safe to always do this.
3386          */
3387         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3388                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3389
3390         /* If we're releasing frames from aggregation or dqa queues then check
3391          * if all the queues that we're releasing frames from, combined, have:
3392          *  - more frames than the service period, in which case more_data
3393          *    needs to be set
3394          *  - fewer than 'cnt' frames, in which case we need to adjust the
3395          *    firmware command (but do that unconditionally)
3396          */
3397         if (single_sta_queue) {
3398                 int remaining = cnt;
3399                 int sleep_tx_count;
3400
3401                 spin_lock_bh(&mvmsta->lock);
3402                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3403                         struct iwl_mvm_tid_data *tid_data;
3404                         u16 n_queued;
3405
3406                         tid_data = &mvmsta->tid_data[tid];
3407
3408                         n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3409                         if (n_queued > remaining) {
3410                                 more_data = true;
3411                                 remaining = 0;
3412                                 break;
3413                         }
3414                         remaining -= n_queued;
3415                 }
3416                 sleep_tx_count = cnt - remaining;
3417                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3418                         mvmsta->sleep_tx_count = sleep_tx_count;
3419                 spin_unlock_bh(&mvmsta->lock);
3420
3421                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3422                 if (WARN_ON(cnt - remaining == 0)) {
3423                         ieee80211_sta_eosp(sta);
3424                         return;
3425                 }
3426         }
3427
3428         /* Note: this is ignored by firmware not supporting GO uAPSD */
3429         if (more_data)
3430                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3431
3432         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3433                 mvmsta->next_status_eosp = true;
3434                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3435         } else {
3436                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3437         }
3438
3439         /* block the Tx queues until the FW updated the sleep Tx count */
3440         iwl_trans_block_txq_ptrs(mvm->trans, true);
3441
3442         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3443                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3444                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3445         if (ret)
3446                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3447 }
3448
3449 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3450                            struct iwl_rx_cmd_buffer *rxb)
3451 {
3452         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3453         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3454         struct ieee80211_sta *sta;
3455         u32 sta_id = le32_to_cpu(notif->sta_id);
3456
3457         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3458                 return;
3459
3460         rcu_read_lock();
3461         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3462         if (!IS_ERR_OR_NULL(sta))
3463                 ieee80211_sta_eosp(sta);
3464         rcu_read_unlock();
3465 }
3466
3467 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3468                                    struct iwl_mvm_sta *mvmsta, bool disable)
3469 {
3470         struct iwl_mvm_add_sta_cmd cmd = {
3471                 .add_modify = STA_MODE_MODIFY,
3472                 .sta_id = mvmsta->sta_id,
3473                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3474                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3475                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3476         };
3477         int ret;
3478
3479         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3480                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3481         if (ret)
3482                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3483 }
3484
3485 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3486                                       struct ieee80211_sta *sta,
3487                                       bool disable)
3488 {
3489         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3490
3491         spin_lock_bh(&mvm_sta->lock);
3492
3493         if (mvm_sta->disable_tx == disable) {
3494                 spin_unlock_bh(&mvm_sta->lock);
3495                 return;
3496         }
3497
3498         mvm_sta->disable_tx = disable;
3499
3500         /* Tell mac80211 to start/stop queuing tx for this station */
3501         ieee80211_sta_block_awake(mvm->hw, sta, disable);
3502
3503         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3504
3505         spin_unlock_bh(&mvm_sta->lock);
3506 }
3507
3508 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3509                                               struct iwl_mvm_vif *mvmvif,
3510                                               struct iwl_mvm_int_sta *sta,
3511                                               bool disable)
3512 {
3513         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3514         struct iwl_mvm_add_sta_cmd cmd = {
3515                 .add_modify = STA_MODE_MODIFY,
3516                 .sta_id = sta->sta_id,
3517                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3518                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3519                 .mac_id_n_color = cpu_to_le32(id),
3520         };
3521         int ret;
3522
3523         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3524                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3525         if (ret)
3526                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3527 }
3528
3529 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3530                                        struct iwl_mvm_vif *mvmvif,
3531                                        bool disable)
3532 {
3533         struct ieee80211_sta *sta;
3534         struct iwl_mvm_sta *mvm_sta;
3535         int i;
3536
3537         lockdep_assert_held(&mvm->mutex);
3538
3539         /* Block/unblock all the stations of the given mvmvif */
3540         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3541                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3542                                                 lockdep_is_held(&mvm->mutex));
3543                 if (IS_ERR_OR_NULL(sta))
3544                         continue;
3545
3546                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3547                 if (mvm_sta->mac_id_n_color !=
3548                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3549                         continue;
3550
3551                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3552         }
3553
3554         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3555                 return;
3556
3557         /* Need to block/unblock also multicast station */
3558         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3559                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3560                                                   &mvmvif->mcast_sta, disable);
3561
3562         /*
3563          * Only unblock the broadcast station (FW blocks it for immediate
3564          * quiet, not the driver)
3565          */
3566         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3567                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3568                                                   &mvmvif->bcast_sta, disable);
3569 }
3570
3571 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3572 {
3573         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3574         struct iwl_mvm_sta *mvmsta;
3575
3576         rcu_read_lock();
3577
3578         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3579
3580         if (!WARN_ON(!mvmsta))
3581                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3582
3583         rcu_read_unlock();
3584 }
3585
3586 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3587 {
3588         u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3589
3590         /*
3591          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
3592          * to align the wrap around of ssn so we compare relevant values.
3593          */
3594         if (mvm->trans->cfg->gen2)
3595                 sn &= 0xff;
3596
3597         return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3598 }