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