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

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