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

   1 /******************************************************************************
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   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
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  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018 Intel Corporation
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  14  * it under the terms of version 2 of the GNU General Public License as
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  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  63  *****************************************************************************/
  64 #include <net/mac80211.h>
  65
  66 #include "mvm.h"
  67 #include "sta.h"
  68 #include "rs.h"
  69
  70 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm);
  71
  72 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
  73                                 u32 sta_id,
  74                                 struct ieee80211_key_conf *key, bool mcast,
  75                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
  76                                 u8 key_offset, bool mfp);
  77
  78 /*
  79  * New version of ADD_STA_sta command added new fields at the end of the
  80  * structure, so sending the size of the relevant API's structure is enough to
  81  * support both API versions.
  82  */
  83 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
  84 {
  85         if (iwl_mvm_has_new_rx_api(mvm) ||
  86             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
  87                 return sizeof(struct iwl_mvm_add_sta_cmd);
  88         else
  89                 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
  90 }
  91
  92 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
  93                                     enum nl80211_iftype iftype)
  94 {
  95         int sta_id;
  96         u32 reserved_ids = 0;
  97
  98         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
  99         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
 100
 101         lockdep_assert_held(&mvm->mutex);
 102
 103         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
 104         if (iftype != NL80211_IFTYPE_STATION)
 105                 reserved_ids = BIT(0);
 106
 107         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
 108         for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
 109                 if (BIT(sta_id) & reserved_ids)
 110                         continue;
 111
 112                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 113                                                lockdep_is_held(&mvm->mutex)))
 114                         return sta_id;
 115         }
 116         return IWL_MVM_INVALID_STA;
 117 }
 118
 119 /* send station add/update command to firmware */
 120 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 121                            bool update, unsigned int flags)
 122 {
 123         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 124         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
 125                 .sta_id = mvm_sta->sta_id,
 126                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
 127                 .add_modify = update ? 1 : 0,
 128                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
 129                                                  STA_FLG_MIMO_EN_MSK |
 130                                                  STA_FLG_RTS_MIMO_PROT),
 131                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 132         };
 133         int ret;
 134         u32 status;
 135         u32 agg_size = 0, mpdu_dens = 0;
 136
 137         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
 138                 add_sta_cmd.station_type = mvm_sta->sta_type;
 139
 140         if (!update || (flags & STA_MODIFY_QUEUES)) {
 141                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 142
 143                 if (!iwl_mvm_has_new_tx_api(mvm)) {
 144                         add_sta_cmd.tfd_queue_msk =
 145                                 cpu_to_le32(mvm_sta->tfd_queue_msk);
 146
 147                         if (flags & STA_MODIFY_QUEUES)
 148                                 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 149                 } else {
 150                         WARN_ON(flags & STA_MODIFY_QUEUES);
 151                 }
 152         }
 153
 154         switch (sta->bandwidth) {
 155         case IEEE80211_STA_RX_BW_160:
 156                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 157                 /* fall through */
 158         case IEEE80211_STA_RX_BW_80:
 159                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 160                 /* fall through */
 161         case IEEE80211_STA_RX_BW_40:
 162                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 163                 /* fall through */
 164         case IEEE80211_STA_RX_BW_20:
 165                 if (sta->ht_cap.ht_supported)
 166                         add_sta_cmd.station_flags |=
 167                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 168                 break;
 169         }
 170
 171         switch (sta->rx_nss) {
 172         case 1:
 173                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 174                 break;
 175         case 2:
 176                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 177                 break;
 178         case 3 ... 8:
 179                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 180                 break;
 181         }
 182
 183         switch (sta->smps_mode) {
 184         case IEEE80211_SMPS_AUTOMATIC:
 185         case IEEE80211_SMPS_NUM_MODES:
 186                 WARN_ON(1);
 187                 break;
 188         case IEEE80211_SMPS_STATIC:
 189                 /* override NSS */
 190                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 191                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 192                 break;
 193         case IEEE80211_SMPS_DYNAMIC:
 194                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 195                 break;
 196         case IEEE80211_SMPS_OFF:
 197                 /* nothing */
 198                 break;
 199         }
 200
 201         if (sta->ht_cap.ht_supported) {
 202                 add_sta_cmd.station_flags_msk |=
 203                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 204                                     STA_FLG_AGG_MPDU_DENS_MSK);
 205
 206                 mpdu_dens = sta->ht_cap.ampdu_density;
 207         }
 208
 209         if (sta->vht_cap.vht_supported) {
 210                 agg_size = sta->vht_cap.cap &
 211                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 212                 agg_size >>=
 213                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 214         } else if (sta->ht_cap.ht_supported) {
 215                 agg_size = sta->ht_cap.ampdu_factor;
 216         }
 217
 218         add_sta_cmd.station_flags |=
 219                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 220         add_sta_cmd.station_flags |=
 221                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 222         if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
 223                 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 224
 225         if (sta->wme) {
 226                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 227
 228                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 229                         add_sta_cmd.uapsd_acs |= BIT(AC_BK);
 230                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 231                         add_sta_cmd.uapsd_acs |= BIT(AC_BE);
 232                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 233                         add_sta_cmd.uapsd_acs |= BIT(AC_VI);
 234                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 235                         add_sta_cmd.uapsd_acs |= BIT(AC_VO);
 236                 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
 237                 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
 238         }
 239
 240         status = ADD_STA_SUCCESS;
 241         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 242                                           iwl_mvm_add_sta_cmd_size(mvm),
 243                                           &add_sta_cmd, &status);
 244         if (ret)
 245                 return ret;
 246
 247         switch (status & IWL_ADD_STA_STATUS_MASK) {
 248         case ADD_STA_SUCCESS:
 249                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 250                 break;
 251         default:
 252                 ret = -EIO;
 253                 IWL_ERR(mvm, "ADD_STA failed\n");
 254                 break;
 255         }
 256
 257         return ret;
 258 }
 259
 260 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
 261 {
 262         struct iwl_mvm_baid_data *data =
 263                 from_timer(data, t, session_timer);
 264         struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
 265         struct iwl_mvm_baid_data *ba_data;
 266         struct ieee80211_sta *sta;
 267         struct iwl_mvm_sta *mvm_sta;
 268         unsigned long timeout;
 269
 270         rcu_read_lock();
 271
 272         ba_data = rcu_dereference(*rcu_ptr);
 273
 274         if (WARN_ON(!ba_data))
 275                 goto unlock;
 276
 277         if (!ba_data->timeout)
 278                 goto unlock;
 279
 280         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 281         if (time_is_after_jiffies(timeout)) {
 282                 mod_timer(&ba_data->session_timer, timeout);
 283                 goto unlock;
 284         }
 285
 286         /* Timer expired */
 287         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 288
 289         /*
 290          * sta should be valid unless the following happens:
 291          * The firmware asserts which triggers a reconfig flow, but
 292          * the reconfig fails before we set the pointer to sta into
 293          * the fw_id_to_mac_id pointer table. Mac80211 can't stop
 294          * A-MDPU and hence the timer continues to run. Then, the
 295          * timer expires and sta is NULL.
 296          */
 297         if (!sta)
 298                 goto unlock;
 299
 300         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 301         ieee80211_rx_ba_timer_expired(mvm_sta->vif,
 302                                       sta->addr, ba_data->tid);
 303 unlock:
 304         rcu_read_unlock();
 305 }
 306
 307 /* Disable aggregations for a bitmap of TIDs for a given station */
 308 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 309                                         unsigned long disable_agg_tids,
 310                                         bool remove_queue)
 311 {
 312         struct iwl_mvm_add_sta_cmd cmd = {};
 313         struct ieee80211_sta *sta;
 314         struct iwl_mvm_sta *mvmsta;
 315         u32 status;
 316         u8 sta_id;
 317         int ret;
 318
 319         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 320                 return -EINVAL;
 321
 322         spin_lock_bh(&mvm->queue_info_lock);
 323         sta_id = mvm->queue_info[queue].ra_sta_id;
 324         spin_unlock_bh(&mvm->queue_info_lock);
 325
 326         rcu_read_lock();
 327
 328         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 329
 330         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 331                 rcu_read_unlock();
 332                 return -EINVAL;
 333         }
 334
 335         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 336
 337         mvmsta->tid_disable_agg |= disable_agg_tids;
 338
 339         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 340         cmd.sta_id = mvmsta->sta_id;
 341         cmd.add_modify = STA_MODE_MODIFY;
 342         cmd.modify_mask = STA_MODIFY_QUEUES;
 343         if (disable_agg_tids)
 344                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 345         if (remove_queue)
 346                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 347         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 348         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 349
 350         rcu_read_unlock();
 351
 352         /* Notify FW of queue removal from the STA queues */
 353         status = ADD_STA_SUCCESS;
 354         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 355                                           iwl_mvm_add_sta_cmd_size(mvm),
 356                                           &cmd, &status);
 357
 358         return ret;
 359 }
 360
 361 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, int queue,
 362                                int mac80211_queue, u8 tid, u8 flags)
 363 {
 364         struct iwl_scd_txq_cfg_cmd cmd = {
 365                 .scd_queue = queue,
 366                 .action = SCD_CFG_DISABLE_QUEUE,
 367         };
 368         bool remove_mac_queue = mac80211_queue != IEEE80211_INVAL_HW_QUEUE;
 369         int ret;
 370
 371         if (WARN_ON(remove_mac_queue && mac80211_queue >= IEEE80211_MAX_QUEUES))
 372                 return -EINVAL;
 373
 374         if (iwl_mvm_has_new_tx_api(mvm)) {
 375                 spin_lock_bh(&mvm->queue_info_lock);
 376
 377                 if (remove_mac_queue)
 378                         mvm->hw_queue_to_mac80211[queue] &=
 379                                 ~BIT(mac80211_queue);
 380
 381                 spin_unlock_bh(&mvm->queue_info_lock);
 382
 383                 iwl_trans_txq_free(mvm->trans, queue);
 384
 385                 return 0;
 386         }
 387
 388         spin_lock_bh(&mvm->queue_info_lock);
 389
 390         if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0)) {
 391                 spin_unlock_bh(&mvm->queue_info_lock);
 392                 return 0;
 393         }
 394
 395         mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
 396
 397         /*
 398          * If there is another TID with the same AC - don't remove the MAC queue
 399          * from the mapping
 400          */
 401         if (tid < IWL_MAX_TID_COUNT) {
 402                 unsigned long tid_bitmap =
 403                         mvm->queue_info[queue].tid_bitmap;
 404                 int ac = tid_to_mac80211_ac[tid];
 405                 int i;
 406
 407                 for_each_set_bit(i, &tid_bitmap, IWL_MAX_TID_COUNT) {
 408                         if (tid_to_mac80211_ac[i] == ac)
 409                                 remove_mac_queue = false;
 410                 }
 411         }
 412
 413         if (remove_mac_queue)
 414                 mvm->hw_queue_to_mac80211[queue] &=
 415                         ~BIT(mac80211_queue);
 416
 417         cmd.action = mvm->queue_info[queue].tid_bitmap ?
 418                 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
 419         if (cmd.action == SCD_CFG_DISABLE_QUEUE)
 420                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
 421
 422         IWL_DEBUG_TX_QUEUES(mvm,
 423                             "Disabling TXQ #%d tids=0x%x (mac80211 map:0x%x)\n",
 424                             queue,
 425                             mvm->queue_info[queue].tid_bitmap,
 426                             mvm->hw_queue_to_mac80211[queue]);
 427
 428         /* If the queue is still enabled - nothing left to do in this func */
 429         if (cmd.action == SCD_CFG_ENABLE_QUEUE) {
 430                 spin_unlock_bh(&mvm->queue_info_lock);
 431                 return 0;
 432         }
 433
 434         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 435         cmd.tid = mvm->queue_info[queue].txq_tid;
 436
 437         /* Make sure queue info is correct even though we overwrite it */
 438         WARN(mvm->queue_info[queue].tid_bitmap ||
 439              mvm->hw_queue_to_mac80211[queue],
 440              "TXQ #%d info out-of-sync - mac map=0x%x, tids=0x%x\n",
 441              queue, mvm->hw_queue_to_mac80211[queue],
 442              mvm->queue_info[queue].tid_bitmap);
 443
 444         /* If we are here - the queue is freed and we can zero out these vals */
 445         mvm->queue_info[queue].tid_bitmap = 0;
 446         mvm->hw_queue_to_mac80211[queue] = 0;
 447
 448         /* Regardless if this is a reserved TXQ for a STA - mark it as false */
 449         mvm->queue_info[queue].reserved = false;
 450
 451         spin_unlock_bh(&mvm->queue_info_lock);
 452
 453         iwl_trans_txq_disable(mvm->trans, queue, false);
 454         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
 455                                    sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
 456
 457         if (ret)
 458                 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
 459                         queue, ret);
 460         return ret;
 461 }
 462
 463 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 464 {
 465         struct ieee80211_sta *sta;
 466         struct iwl_mvm_sta *mvmsta;
 467         unsigned long tid_bitmap;
 468         unsigned long agg_tids = 0;
 469         u8 sta_id;
 470         int tid;
 471
 472         lockdep_assert_held(&mvm->mutex);
 473
 474         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 475                 return -EINVAL;
 476
 477         spin_lock_bh(&mvm->queue_info_lock);
 478         sta_id = mvm->queue_info[queue].ra_sta_id;
 479         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 480         spin_unlock_bh(&mvm->queue_info_lock);
 481
 482         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 483                                         lockdep_is_held(&mvm->mutex));
 484
 485         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 486                 return -EINVAL;
 487
 488         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 489
 490         spin_lock_bh(&mvmsta->lock);
 491         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 492                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 493                         agg_tids |= BIT(tid);
 494         }
 495         spin_unlock_bh(&mvmsta->lock);
 496
 497         return agg_tids;
 498 }
 499
 500 /*
 501  * Remove a queue from a station's resources.
 502  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 503  * doesn't disable the queue
 504  */
 505 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 506 {
 507         struct ieee80211_sta *sta;
 508         struct iwl_mvm_sta *mvmsta;
 509         unsigned long tid_bitmap;
 510         unsigned long disable_agg_tids = 0;
 511         u8 sta_id;
 512         int tid;
 513
 514         lockdep_assert_held(&mvm->mutex);
 515
 516         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 517                 return -EINVAL;
 518
 519         spin_lock_bh(&mvm->queue_info_lock);
 520         sta_id = mvm->queue_info[queue].ra_sta_id;
 521         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 522         spin_unlock_bh(&mvm->queue_info_lock);
 523
 524         rcu_read_lock();
 525
 526         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 527
 528         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 529                 rcu_read_unlock();
 530                 return 0;
 531         }
 532
 533         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 534
 535         spin_lock_bh(&mvmsta->lock);
 536         /* Unmap MAC queues and TIDs from this queue */
 537         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 538                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 539                         disable_agg_tids |= BIT(tid);
 540                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
 541         }
 542
 543         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 544         spin_unlock_bh(&mvmsta->lock);
 545
 546         rcu_read_unlock();
 547
 548         return disable_agg_tids;
 549 }
 550
 551 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
 552                                        u8 new_sta_id)
 553 {
 554         struct iwl_mvm_sta *mvmsta;
 555         u8 txq_curr_ac, sta_id, tid;
 556         unsigned long disable_agg_tids = 0;
 557         bool same_sta;
 558         int ret;
 559
 560         lockdep_assert_held(&mvm->mutex);
 561
 562         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 563                 return -EINVAL;
 564
 565         spin_lock_bh(&mvm->queue_info_lock);
 566         txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
 567         sta_id = mvm->queue_info[queue].ra_sta_id;
 568         tid = mvm->queue_info[queue].txq_tid;
 569         spin_unlock_bh(&mvm->queue_info_lock);
 570
 571         same_sta = sta_id == new_sta_id;
 572
 573         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 574         if (WARN_ON(!mvmsta))
 575                 return -EINVAL;
 576
 577         disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 578         /* Disable the queue */
 579         if (disable_agg_tids)
 580                 iwl_mvm_invalidate_sta_queue(mvm, queue,
 581                                              disable_agg_tids, false);
 582
 583         ret = iwl_mvm_disable_txq(mvm, queue,
 584                                   mvmsta->vif->hw_queue[txq_curr_ac],
 585                                   tid, 0);
 586         if (ret) {
 587                 IWL_ERR(mvm,
 588                         "Failed to free inactive queue %d (ret=%d)\n",
 589                         queue, ret);
 590
 591                 return ret;
 592         }
 593
 594         /* If TXQ is allocated to another STA, update removal in FW */
 595         if (!same_sta)
 596                 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 597
 598         return 0;
 599 }
 600
 601 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 602                                     unsigned long tfd_queue_mask, u8 ac)
 603 {
 604         int queue = 0;
 605         u8 ac_to_queue[IEEE80211_NUM_ACS];
 606         int i;
 607
 608         /*
 609          * This protects us against grabbing a queue that's being reconfigured
 610          * by the inactivity checker.
 611          */
 612         lockdep_assert_held(&mvm->mutex);
 613         lockdep_assert_held(&mvm->queue_info_lock);
 614
 615         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 616                 return -EINVAL;
 617
 618         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 619
 620         /* See what ACs the existing queues for this STA have */
 621         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 622                 /* Only DATA queues can be shared */
 623                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 624                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 625                         continue;
 626
 627                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 628         }
 629
 630         /*
 631          * The queue to share is chosen only from DATA queues as follows (in
 632          * descending priority):
 633          * 1. An AC_BE queue
 634          * 2. Same AC queue
 635          * 3. Highest AC queue that is lower than new AC
 636          * 4. Any existing AC (there always is at least 1 DATA queue)
 637          */
 638
 639         /* Priority 1: An AC_BE queue */
 640         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 641                 queue = ac_to_queue[IEEE80211_AC_BE];
 642         /* Priority 2: Same AC queue */
 643         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 644                 queue = ac_to_queue[ac];
 645         /* Priority 3a: If new AC is VO and VI exists - use VI */
 646         else if (ac == IEEE80211_AC_VO &&
 647                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 648                 queue = ac_to_queue[IEEE80211_AC_VI];
 649         /* Priority 3b: No BE so only AC less than the new one is BK */
 650         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 651                 queue = ac_to_queue[IEEE80211_AC_BK];
 652         /* Priority 4a: No BE nor BK - use VI if exists */
 653         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 654                 queue = ac_to_queue[IEEE80211_AC_VI];
 655         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 656         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 657                 queue = ac_to_queue[IEEE80211_AC_VO];
 658
 659         /* Make sure queue found (or not) is legal */
 660         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 661             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 662             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 663                 IWL_ERR(mvm, "No DATA queues available to share\n");
 664                 return -ENOSPC;
 665         }
 666
 667         return queue;
 668 }
 669
 670 /*
 671  * If a given queue has a higher AC than the TID stream that is being compared
 672  * to, the queue needs to be redirected to the lower AC. This function does that
 673  * in such a case, otherwise - if no redirection required - it does nothing,
 674  * unless the %force param is true.
 675  */
 676 static int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
 677                                       int ac, int ssn, unsigned int wdg_timeout,
 678                                       bool force)
 679 {
 680         struct iwl_scd_txq_cfg_cmd cmd = {
 681                 .scd_queue = queue,
 682                 .action = SCD_CFG_DISABLE_QUEUE,
 683         };
 684         bool shared_queue;
 685         unsigned long mq;
 686         int ret;
 687
 688         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 689                 return -EINVAL;
 690
 691         /*
 692          * If the AC is lower than current one - FIFO needs to be redirected to
 693          * the lowest one of the streams in the queue. Check if this is needed
 694          * here.
 695          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 696          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 697          * we need to check if the numerical value of X is LARGER than of Y.
 698          */
 699         spin_lock_bh(&mvm->queue_info_lock);
 700         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 701                 spin_unlock_bh(&mvm->queue_info_lock);
 702
 703                 IWL_DEBUG_TX_QUEUES(mvm,
 704                                     "No redirection needed on TXQ #%d\n",
 705                                     queue);
 706                 return 0;
 707         }
 708
 709         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 710         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 711         cmd.tid = mvm->queue_info[queue].txq_tid;
 712         mq = mvm->hw_queue_to_mac80211[queue];
 713         shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
 714         spin_unlock_bh(&mvm->queue_info_lock);
 715
 716         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 717                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 718
 719         /* Stop MAC queues and wait for this queue to empty */
 720         iwl_mvm_stop_mac_queues(mvm, mq);
 721         ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
 722         if (ret) {
 723                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 724                         queue);
 725                 ret = -EIO;
 726                 goto out;
 727         }
 728
 729         /* Before redirecting the queue we need to de-activate it */
 730         iwl_trans_txq_disable(mvm->trans, queue, false);
 731         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 732         if (ret)
 733                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 734                         ret);
 735
 736         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 737         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 738
 739         /* Update the TID "owner" of the queue */
 740         spin_lock_bh(&mvm->queue_info_lock);
 741         mvm->queue_info[queue].txq_tid = tid;
 742         spin_unlock_bh(&mvm->queue_info_lock);
 743
 744         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 745
 746         /* Redirect to lower AC */
 747         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 748                              cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
 749
 750         /* Update AC marking of the queue */
 751         spin_lock_bh(&mvm->queue_info_lock);
 752         mvm->queue_info[queue].mac80211_ac = ac;
 753         spin_unlock_bh(&mvm->queue_info_lock);
 754
 755         /*
 756          * Mark queue as shared in transport if shared
 757          * Note this has to be done after queue enablement because enablement
 758          * can also set this value, and there is no indication there to shared
 759          * queues
 760          */
 761         if (shared_queue)
 762                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 763
 764 out:
 765         /* Continue using the MAC queues */
 766         iwl_mvm_start_mac_queues(mvm, mq);
 767
 768         return ret;
 769 }
 770
 771 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
 772                                    u8 minq, u8 maxq)
 773 {
 774         int i;
 775
 776         lockdep_assert_held(&mvm->queue_info_lock);
 777
 778         /* This should not be hit with new TX path */
 779         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 780                 return -ENOSPC;
 781
 782         /* Start by looking for a free queue */
 783         for (i = minq; i <= maxq; i++)
 784                 if (mvm->queue_info[i].tid_bitmap == 0 &&
 785                     mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
 786                         return i;
 787
 788         return -ENOSPC;
 789 }
 790
 791 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm, int mac80211_queue,
 792                                    u8 sta_id, u8 tid, unsigned int timeout)
 793 {
 794         int queue, size = IWL_DEFAULT_QUEUE_SIZE;
 795
 796         if (tid == IWL_MAX_TID_COUNT) {
 797                 tid = IWL_MGMT_TID;
 798                 size = IWL_MGMT_QUEUE_SIZE;
 799         }
 800         queue = iwl_trans_txq_alloc(mvm->trans,
 801                                     cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE),
 802                                     sta_id, tid, SCD_QUEUE_CFG, size, timeout);
 803
 804         if (queue < 0) {
 805                 IWL_DEBUG_TX_QUEUES(mvm,
 806                                     "Failed allocating TXQ for sta %d tid %d, ret: %d\n",
 807                                     sta_id, tid, queue);
 808                 return queue;
 809         }
 810
 811         IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
 812                             queue, sta_id, tid);
 813
 814         mvm->hw_queue_to_mac80211[queue] |= BIT(mac80211_queue);
 815         IWL_DEBUG_TX_QUEUES(mvm,
 816                             "Enabling TXQ #%d (mac80211 map:0x%x)\n",
 817                             queue, mvm->hw_queue_to_mac80211[queue]);
 818
 819         return queue;
 820 }
 821
 822 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
 823                                         struct ieee80211_sta *sta, u8 ac,
 824                                         int tid)
 825 {
 826         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 827         unsigned int wdg_timeout =
 828                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 829         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 830         int queue = -1;
 831
 832         lockdep_assert_held(&mvm->mutex);
 833
 834         IWL_DEBUG_TX_QUEUES(mvm,
 835                             "Allocating queue for sta %d on tid %d\n",
 836                             mvmsta->sta_id, tid);
 837         queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
 838                                         wdg_timeout);
 839         if (queue < 0)
 840                 return queue;
 841
 842         IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
 843
 844         spin_lock_bh(&mvmsta->lock);
 845         mvmsta->tid_data[tid].txq_id = queue;
 846         spin_unlock_bh(&mvmsta->lock);
 847
 848         return 0;
 849 }
 850
 851 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm, int queue,
 852                                        int mac80211_queue, u8 sta_id, u8 tid)
 853 {
 854         bool enable_queue = true;
 855
 856         spin_lock_bh(&mvm->queue_info_lock);
 857
 858         /* Make sure this TID isn't already enabled */
 859         if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
 860                 spin_unlock_bh(&mvm->queue_info_lock);
 861                 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
 862                         queue, tid);
 863                 return false;
 864         }
 865
 866         /* Update mappings and refcounts */
 867         if (mvm->queue_info[queue].tid_bitmap)
 868                 enable_queue = false;
 869
 870         if (mac80211_queue != IEEE80211_INVAL_HW_QUEUE) {
 871                 WARN(mac80211_queue >=
 872                      BITS_PER_BYTE * sizeof(mvm->hw_queue_to_mac80211[0]),
 873                      "cannot track mac80211 queue %d (queue %d, sta %d, tid %d)\n",
 874                      mac80211_queue, queue, sta_id, tid);
 875                 mvm->hw_queue_to_mac80211[queue] |= BIT(mac80211_queue);
 876         }
 877
 878         mvm->queue_info[queue].tid_bitmap |= BIT(tid);
 879         mvm->queue_info[queue].ra_sta_id = sta_id;
 880
 881         if (enable_queue) {
 882                 if (tid != IWL_MAX_TID_COUNT)
 883                         mvm->queue_info[queue].mac80211_ac =
 884                                 tid_to_mac80211_ac[tid];
 885                 else
 886                         mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
 887
 888                 mvm->queue_info[queue].txq_tid = tid;
 889         }
 890
 891         IWL_DEBUG_TX_QUEUES(mvm,
 892                             "Enabling TXQ #%d tids=0x%x (mac80211 map:0x%x)\n",
 893                             queue, mvm->queue_info[queue].tid_bitmap,
 894                             mvm->hw_queue_to_mac80211[queue]);
 895
 896         spin_unlock_bh(&mvm->queue_info_lock);
 897
 898         return enable_queue;
 899 }
 900
 901 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, int queue,
 902                                int mac80211_queue, u16 ssn,
 903                                const struct iwl_trans_txq_scd_cfg *cfg,
 904                                unsigned int wdg_timeout)
 905 {
 906         struct iwl_scd_txq_cfg_cmd cmd = {
 907                 .scd_queue = queue,
 908                 .action = SCD_CFG_ENABLE_QUEUE,
 909                 .window = cfg->frame_limit,
 910                 .sta_id = cfg->sta_id,
 911                 .ssn = cpu_to_le16(ssn),
 912                 .tx_fifo = cfg->fifo,
 913                 .aggregate = cfg->aggregate,
 914                 .tid = cfg->tid,
 915         };
 916         bool inc_ssn;
 917
 918         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 919                 return false;
 920
 921         /* Send the enabling command if we need to */
 922         if (!iwl_mvm_update_txq_mapping(mvm, queue, mac80211_queue,
 923                                         cfg->sta_id, cfg->tid))
 924                 return false;
 925
 926         inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
 927                                            NULL, wdg_timeout);
 928         if (inc_ssn)
 929                 le16_add_cpu(&cmd.ssn, 1);
 930
 931         WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
 932              "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
 933
 934         return inc_ssn;
 935 }
 936
 937 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
 938 {
 939         struct iwl_scd_txq_cfg_cmd cmd = {
 940                 .scd_queue = queue,
 941                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 942         };
 943         int tid;
 944         unsigned long tid_bitmap;
 945         int ret;
 946
 947         lockdep_assert_held(&mvm->mutex);
 948
 949         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 950                 return;
 951
 952         spin_lock_bh(&mvm->queue_info_lock);
 953         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 954         spin_unlock_bh(&mvm->queue_info_lock);
 955
 956         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 957                 return;
 958
 959         /* Find any TID for queue */
 960         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 961         cmd.tid = tid;
 962         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 963
 964         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 965         if (ret) {
 966                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 967                         queue, ret);
 968                 return;
 969         }
 970
 971         spin_lock_bh(&mvm->queue_info_lock);
 972         mvm->queue_info[queue].txq_tid = tid;
 973         spin_unlock_bh(&mvm->queue_info_lock);
 974         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 975                             queue, tid);
 976 }
 977
 978 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
 979 {
 980         struct ieee80211_sta *sta;
 981         struct iwl_mvm_sta *mvmsta;
 982         u8 sta_id;
 983         int tid = -1;
 984         unsigned long tid_bitmap;
 985         unsigned int wdg_timeout;
 986         int ssn;
 987         int ret = true;
 988
 989         /* queue sharing is disabled on new TX path */
 990         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 991                 return;
 992
 993         lockdep_assert_held(&mvm->mutex);
 994
 995         spin_lock_bh(&mvm->queue_info_lock);
 996         sta_id = mvm->queue_info[queue].ra_sta_id;
 997         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 998         spin_unlock_bh(&mvm->queue_info_lock);
 999
1000         /* Find TID for queue, and make sure it is the only one on the queue */
1001         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1002         if (tid_bitmap != BIT(tid)) {
1003                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1004                         queue, tid_bitmap);
1005                 return;
1006         }
1007
1008         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1009                             tid);
1010
1011         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1012                                         lockdep_is_held(&mvm->mutex));
1013
1014         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1015                 return;
1016
1017         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1018         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1019
1020         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1021
1022         ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
1023                                          tid_to_mac80211_ac[tid], ssn,
1024                                          wdg_timeout, true);
1025         if (ret) {
1026                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1027                 return;
1028         }
1029
1030         /* If aggs should be turned back on - do it */
1031         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1032                 struct iwl_mvm_add_sta_cmd cmd = {0};
1033
1034                 mvmsta->tid_disable_agg &= ~BIT(tid);
1035
1036                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1037                 cmd.sta_id = mvmsta->sta_id;
1038                 cmd.add_modify = STA_MODE_MODIFY;
1039                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1040                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1041                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1042
1043                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1044                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1045                 if (!ret) {
1046                         IWL_DEBUG_TX_QUEUES(mvm,
1047                                             "TXQ #%d is now aggregated again\n",
1048                                             queue);
1049
1050                         /* Mark queue intenally as aggregating again */
1051                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1052                 }
1053         }
1054
1055         spin_lock_bh(&mvm->queue_info_lock);
1056         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1057         spin_unlock_bh(&mvm->queue_info_lock);
1058 }
1059
1060 /*
1061  * Remove inactive TIDs of a given queue.
1062  * If all queue TIDs are inactive - mark the queue as inactive
1063  * If only some the queue TIDs are inactive - unmap them from the queue
1064  *
1065  * Returns %true if all TIDs were removed and the queue could be reused.
1066  */
1067 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1068                                          struct iwl_mvm_sta *mvmsta, int queue,
1069                                          unsigned long tid_bitmap,
1070                                          unsigned long *unshare_queues,
1071                                          unsigned long *changetid_queues)
1072 {
1073         int tid;
1074
1075         lockdep_assert_held(&mvmsta->lock);
1076         lockdep_assert_held(&mvm->queue_info_lock);
1077
1078         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1079                 return false;
1080
1081         /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1082         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1083                 /* If some TFDs are still queued - don't mark TID as inactive */
1084                 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1085                         tid_bitmap &= ~BIT(tid);
1086
1087                 /* Don't mark as inactive any TID that has an active BA */
1088                 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1089                         tid_bitmap &= ~BIT(tid);
1090         }
1091
1092         /* If all TIDs in the queue are inactive - return it can be reused */
1093         if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1094                 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1095                 return true;
1096         }
1097
1098         /*
1099          * If we are here, this is a shared queue and not all TIDs timed-out.
1100          * Remove the ones that did.
1101          */
1102         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1103                 int mac_queue = mvmsta->vif->hw_queue[tid_to_mac80211_ac[tid]];
1104                 u16 tid_bitmap;
1105
1106                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1107                 mvm->hw_queue_to_mac80211[queue] &= ~BIT(mac_queue);
1108                 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1109
1110                 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1111
1112                 /*
1113                  * We need to take into account a situation in which a TXQ was
1114                  * allocated to TID x, and then turned shared by adding TIDs y
1115                  * and z. If TID x becomes inactive and is removed from the TXQ,
1116                  * ownership must be given to one of the remaining TIDs.
1117                  * This is mainly because if TID x continues - a new queue can't
1118                  * be allocated for it as long as it is an owner of another TXQ.
1119                  *
1120                  * Mark this queue in the right bitmap, we'll send the command
1121                  * to the firmware later.
1122                  */
1123                 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1124                         set_bit(queue, changetid_queues);
1125
1126                 IWL_DEBUG_TX_QUEUES(mvm,
1127                                     "Removing inactive TID %d from shared Q:%d\n",
1128                                     tid, queue);
1129         }
1130
1131         IWL_DEBUG_TX_QUEUES(mvm,
1132                             "TXQ #%d left with tid bitmap 0x%x\n", queue,
1133                             mvm->queue_info[queue].tid_bitmap);
1134
1135         /*
1136          * There may be different TIDs with the same mac queues, so make
1137          * sure all TIDs have existing corresponding mac queues enabled
1138          */
1139         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1140         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1141                 mvm->hw_queue_to_mac80211[queue] |=
1142                         BIT(mvmsta->vif->hw_queue[tid_to_mac80211_ac[tid]]);
1143         }
1144
1145         /* If the queue is marked as shared - "unshare" it */
1146         if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1147             mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1148                 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1149                                     queue);
1150                 set_bit(queue, unshare_queues);
1151         }
1152
1153         return false;
1154 }
1155
1156 /*
1157  * Check for inactivity - this includes checking if any queue
1158  * can be unshared and finding one (and only one) that can be
1159  * reused.
1160  * This function is also invoked as a sort of clean-up task,
1161  * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1162  *
1163  * Returns the queue number, or -ENOSPC.
1164  */
1165 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1166 {
1167         unsigned long now = jiffies;
1168         unsigned long unshare_queues = 0;
1169         unsigned long changetid_queues = 0;
1170         int i, ret, free_queue = -ENOSPC;
1171
1172         lockdep_assert_held(&mvm->mutex);
1173
1174         if (iwl_mvm_has_new_tx_api(mvm))
1175                 return -ENOSPC;
1176
1177         spin_lock_bh(&mvm->queue_info_lock);
1178
1179         rcu_read_lock();
1180
1181         /* we skip the CMD queue below by starting at 1 */
1182         BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1183
1184         for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1185                 struct ieee80211_sta *sta;
1186                 struct iwl_mvm_sta *mvmsta;
1187                 u8 sta_id;
1188                 int tid;
1189                 unsigned long inactive_tid_bitmap = 0;
1190                 unsigned long queue_tid_bitmap;
1191
1192                 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1193                 if (!queue_tid_bitmap)
1194                         continue;
1195
1196                 /* If TXQ isn't in active use anyway - nothing to do here... */
1197                 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1198                     mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1199                         continue;
1200
1201                 /* Check to see if there are inactive TIDs on this queue */
1202                 for_each_set_bit(tid, &queue_tid_bitmap,
1203                                  IWL_MAX_TID_COUNT + 1) {
1204                         if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1205                                        IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1206                                 continue;
1207
1208                         inactive_tid_bitmap |= BIT(tid);
1209                 }
1210
1211                 /* If all TIDs are active - finish check on this queue */
1212                 if (!inactive_tid_bitmap)
1213                         continue;
1214
1215                 /*
1216                  * If we are here - the queue hadn't been served recently and is
1217                  * in use
1218                  */
1219
1220                 sta_id = mvm->queue_info[i].ra_sta_id;
1221                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1222
1223                 /*
1224                  * If the STA doesn't exist anymore, it isn't an error. It could
1225                  * be that it was removed since getting the queues, and in this
1226                  * case it should've inactivated its queues anyway.
1227                  */
1228                 if (IS_ERR_OR_NULL(sta))
1229                         continue;
1230
1231                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1232
1233                 /* this isn't so nice, but works OK due to the way we loop */
1234                 spin_unlock(&mvm->queue_info_lock);
1235
1236                 /* and we need this locking order */
1237                 spin_lock(&mvmsta->lock);
1238                 spin_lock(&mvm->queue_info_lock);
1239                 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1240                                                    inactive_tid_bitmap,
1241                                                    &unshare_queues,
1242                                                    &changetid_queues);
1243                 if (ret >= 0 && free_queue < 0)
1244                         free_queue = ret;
1245                 /* only unlock sta lock - we still need the queue info lock */
1246                 spin_unlock(&mvmsta->lock);
1247         }
1248
1249         rcu_read_unlock();
1250         spin_unlock_bh(&mvm->queue_info_lock);
1251
1252         /* Reconfigure queues requiring reconfiguation */
1253         for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1254                 iwl_mvm_unshare_queue(mvm, i);
1255         for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1256                 iwl_mvm_change_queue_tid(mvm, i);
1257
1258         if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1259                 ret = iwl_mvm_free_inactive_queue(mvm, free_queue,
1260                                                   alloc_for_sta);
1261                 if (ret)
1262                         return ret;
1263         }
1264
1265         return free_queue;
1266 }
1267
1268 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1269                                    struct ieee80211_sta *sta, u8 ac, int tid,
1270                                    struct ieee80211_hdr *hdr)
1271 {
1272         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1273         struct iwl_trans_txq_scd_cfg cfg = {
1274                 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1275                 .sta_id = mvmsta->sta_id,
1276                 .tid = tid,
1277                 .frame_limit = IWL_FRAME_LIMIT,
1278         };
1279         unsigned int wdg_timeout =
1280                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1281         u8 mac_queue = mvmsta->vif->hw_queue[ac];
1282         int queue = -1;
1283         unsigned long disable_agg_tids = 0;
1284         enum iwl_mvm_agg_state queue_state;
1285         bool shared_queue = false, inc_ssn;
1286         int ssn;
1287         unsigned long tfd_queue_mask;
1288         int ret;
1289
1290         lockdep_assert_held(&mvm->mutex);
1291
1292         if (iwl_mvm_has_new_tx_api(mvm))
1293                 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1294
1295         spin_lock_bh(&mvmsta->lock);
1296         tfd_queue_mask = mvmsta->tfd_queue_msk;
1297         spin_unlock_bh(&mvmsta->lock);
1298
1299         spin_lock_bh(&mvm->queue_info_lock);
1300
1301         /*
1302          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
1303          * exists
1304          */
1305         if (!ieee80211_is_data_qos(hdr->frame_control) ||
1306             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
1307                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1308                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1309                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1310                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1311                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1312                                             queue);
1313
1314                 /* If no such queue is found, we'll use a DATA queue instead */
1315         }
1316
1317         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1318             (mvm->queue_info[mvmsta->reserved_queue].status ==
1319                         IWL_MVM_QUEUE_RESERVED)) {
1320                 queue = mvmsta->reserved_queue;
1321                 mvm->queue_info[queue].reserved = true;
1322                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1323         }
1324
1325         if (queue < 0)
1326                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1327                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1328                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1329         if (queue < 0) {
1330                 spin_unlock_bh(&mvm->queue_info_lock);
1331
1332                 /* try harder - perhaps kill an inactive queue */
1333                 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1334
1335                 spin_lock_bh(&mvm->queue_info_lock);
1336         }
1337
1338         /* No free queue - we'll have to share */
1339         if (queue <= 0) {
1340                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1341                 if (queue > 0) {
1342                         shared_queue = true;
1343                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1344                 }
1345         }
1346
1347         /*
1348          * Mark TXQ as ready, even though it hasn't been fully configured yet,
1349          * to make sure no one else takes it.
1350          * This will allow avoiding re-acquiring the lock at the end of the
1351          * configuration. On error we'll mark it back as free.
1352          */
1353         if (queue > 0 && !shared_queue)
1354                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1355
1356         spin_unlock_bh(&mvm->queue_info_lock);
1357
1358         /* This shouldn't happen - out of queues */
1359         if (WARN_ON(queue <= 0)) {
1360                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1361                         tid, cfg.sta_id);
1362                 return queue;
1363         }
1364
1365         /*
1366          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1367          * but for configuring the SCD to send A-MPDUs we need to mark the queue
1368          * as aggregatable.
1369          * Mark all DATA queues as allowing to be aggregated at some point
1370          */
1371         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1372                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1373
1374         IWL_DEBUG_TX_QUEUES(mvm,
1375                             "Allocating %squeue #%d to sta %d on tid %d\n",
1376                             shared_queue ? "shared " : "", queue,
1377                             mvmsta->sta_id, tid);
1378
1379         if (shared_queue) {
1380                 /* Disable any open aggs on this queue */
1381                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1382
1383                 if (disable_agg_tids) {
1384                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1385                                             queue);
1386                         iwl_mvm_invalidate_sta_queue(mvm, queue,
1387                                                      disable_agg_tids, false);
1388                 }
1389         }
1390
1391         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
1392         inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
1393                                      ssn, &cfg, wdg_timeout);
1394         if (inc_ssn) {
1395                 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1396                 le16_add_cpu(&hdr->seq_ctrl, 0x10);
1397         }
1398
1399         /*
1400          * Mark queue as shared in transport if shared
1401          * Note this has to be done after queue enablement because enablement
1402          * can also set this value, and there is no indication there to shared
1403          * queues
1404          */
1405         if (shared_queue)
1406                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1407
1408         spin_lock_bh(&mvmsta->lock);
1409         /*
1410          * This looks racy, but it is not. We have only one packet for
1411          * this ra/tid in our Tx path since we stop the Qdisc when we
1412          * need to allocate a new TFD queue.
1413          */
1414         if (inc_ssn)
1415                 mvmsta->tid_data[tid].seq_number += 0x10;
1416         mvmsta->tid_data[tid].txq_id = queue;
1417         mvmsta->tfd_queue_msk |= BIT(queue);
1418         queue_state = mvmsta->tid_data[tid].state;
1419
1420         if (mvmsta->reserved_queue == queue)
1421                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1422         spin_unlock_bh(&mvmsta->lock);
1423
1424         if (!shared_queue) {
1425                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1426                 if (ret)
1427                         goto out_err;
1428
1429                 /* If we need to re-enable aggregations... */
1430                 if (queue_state == IWL_AGG_ON) {
1431                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1432                         if (ret)
1433                                 goto out_err;
1434                 }
1435         } else {
1436                 /* Redirect queue, if needed */
1437                 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
1438                                                  wdg_timeout, false);
1439                 if (ret)
1440                         goto out_err;
1441         }
1442
1443         return 0;
1444
1445 out_err:
1446         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
1447
1448         return ret;
1449 }
1450
1451 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1452 {
1453         if (tid == IWL_MAX_TID_COUNT)
1454                 return IEEE80211_AC_VO; /* MGMT */
1455
1456         return tid_to_mac80211_ac[tid];
1457 }
1458
1459 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1460                                        struct ieee80211_sta *sta, int tid)
1461 {
1462         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1463         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1464         struct sk_buff *skb;
1465         struct ieee80211_hdr *hdr;
1466         struct sk_buff_head deferred_tx;
1467         u8 mac_queue;
1468         bool no_queue = false; /* Marks if there is a problem with the queue */
1469         u8 ac;
1470
1471         lockdep_assert_held(&mvm->mutex);
1472
1473         skb = skb_peek(&tid_data->deferred_tx_frames);
1474         if (!skb)
1475                 return;
1476         hdr = (void *)skb->data;
1477
1478         ac = iwl_mvm_tid_to_ac_queue(tid);
1479         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1480
1481         if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1482             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1483                 IWL_ERR(mvm,
1484                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1485                         mvmsta->sta_id, tid);
1486
1487                 /*
1488                  * Mark queue as problematic so later the deferred traffic is
1489                  * freed, as we can do nothing with it
1490                  */
1491                 no_queue = true;
1492         }
1493
1494         __skb_queue_head_init(&deferred_tx);
1495
1496         /* Disable bottom-halves when entering TX path */
1497         local_bh_disable();
1498         spin_lock(&mvmsta->lock);
1499         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1500         mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1501         spin_unlock(&mvmsta->lock);
1502
1503         while ((skb = __skb_dequeue(&deferred_tx)))
1504                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1505                         ieee80211_free_txskb(mvm->hw, skb);
1506         local_bh_enable();
1507
1508         /* Wake queue */
1509         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1510 }
1511
1512 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1513 {
1514         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1515                                            add_stream_wk);
1516         struct ieee80211_sta *sta;
1517         struct iwl_mvm_sta *mvmsta;
1518         unsigned long deferred_tid_traffic;
1519         int sta_id, tid;
1520
1521         mutex_lock(&mvm->mutex);
1522
1523         iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1524
1525         /* Go over all stations with deferred traffic */
1526         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1527                          IWL_MVM_STATION_COUNT) {
1528                 clear_bit(sta_id, mvm->sta_deferred_frames);
1529                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1530                                                 lockdep_is_held(&mvm->mutex));
1531                 if (IS_ERR_OR_NULL(sta))
1532                         continue;
1533
1534                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1535                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1536
1537                 for_each_set_bit(tid, &deferred_tid_traffic,
1538                                  IWL_MAX_TID_COUNT + 1)
1539                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1540         }
1541
1542         mutex_unlock(&mvm->mutex);
1543 }
1544
1545 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1546                                       struct ieee80211_sta *sta,
1547                                       enum nl80211_iftype vif_type)
1548 {
1549         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1550         int queue;
1551
1552         /* queue reserving is disabled on new TX path */
1553         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1554                 return 0;
1555
1556         /* run the general cleanup/unsharing of queues */
1557         iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1558
1559         spin_lock_bh(&mvm->queue_info_lock);
1560
1561         /* Make sure we have free resources for this STA */
1562         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1563             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1564             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1565              IWL_MVM_QUEUE_FREE))
1566                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1567         else
1568                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1569                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1570                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1571         if (queue < 0) {
1572                 spin_unlock_bh(&mvm->queue_info_lock);
1573                 /* try again - this time kick out a queue if needed */
1574                 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1575                 if (queue < 0) {
1576                         IWL_ERR(mvm, "No available queues for new station\n");
1577                         return -ENOSPC;
1578                 }
1579                 spin_lock_bh(&mvm->queue_info_lock);
1580         }
1581         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1582
1583         spin_unlock_bh(&mvm->queue_info_lock);
1584
1585         mvmsta->reserved_queue = queue;
1586
1587         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1588                             queue, mvmsta->sta_id);
1589
1590         return 0;
1591 }
1592
1593 /*
1594  * In DQA mode, after a HW restart the queues should be allocated as before, in
1595  * order to avoid race conditions when there are shared queues. This function
1596  * does the re-mapping and queue allocation.
1597  *
1598  * Note that re-enabling aggregations isn't done in this function.
1599  */
1600 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1601                                                  struct iwl_mvm_sta *mvm_sta)
1602 {
1603         unsigned int wdg_timeout =
1604                         iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1605         int i;
1606         struct iwl_trans_txq_scd_cfg cfg = {
1607                 .sta_id = mvm_sta->sta_id,
1608                 .frame_limit = IWL_FRAME_LIMIT,
1609         };
1610
1611         /* Make sure reserved queue is still marked as such (if allocated) */
1612         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1613                 mvm->queue_info[mvm_sta->reserved_queue].status =
1614                         IWL_MVM_QUEUE_RESERVED;
1615
1616         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1617                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1618                 int txq_id = tid_data->txq_id;
1619                 int ac;
1620                 u8 mac_queue;
1621
1622                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1623                         continue;
1624
1625                 skb_queue_head_init(&tid_data->deferred_tx_frames);
1626
1627                 ac = tid_to_mac80211_ac[i];
1628                 mac_queue = mvm_sta->vif->hw_queue[ac];
1629
1630                 if (iwl_mvm_has_new_tx_api(mvm)) {
1631                         IWL_DEBUG_TX_QUEUES(mvm,
1632                                             "Re-mapping sta %d tid %d\n",
1633                                             mvm_sta->sta_id, i);
1634                         txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1635                                                          mvm_sta->sta_id,
1636                                                          i, wdg_timeout);
1637                         tid_data->txq_id = txq_id;
1638
1639                         /*
1640                          * Since we don't set the seq number after reset, and HW
1641                          * sets it now, FW reset will cause the seq num to start
1642                          * at 0 again, so driver will need to update it
1643                          * internally as well, so it keeps in sync with real val
1644                          */
1645                         tid_data->seq_number = 0;
1646                 } else {
1647                         u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1648
1649                         cfg.tid = i;
1650                         cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1651                         cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1652                                          txq_id ==
1653                                          IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1654
1655                         IWL_DEBUG_TX_QUEUES(mvm,
1656                                             "Re-mapping sta %d tid %d to queue %d\n",
1657                                             mvm_sta->sta_id, i, txq_id);
1658
1659                         iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1660                                            wdg_timeout);
1661                         mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1662                 }
1663         }
1664 }
1665
1666 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1667                                       struct iwl_mvm_int_sta *sta,
1668                                       const u8 *addr,
1669                                       u16 mac_id, u16 color)
1670 {
1671         struct iwl_mvm_add_sta_cmd cmd;
1672         int ret;
1673         u32 status = ADD_STA_SUCCESS;
1674
1675         lockdep_assert_held(&mvm->mutex);
1676
1677         memset(&cmd, 0, sizeof(cmd));
1678         cmd.sta_id = sta->sta_id;
1679         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1680                                                              color));
1681         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1682                 cmd.station_type = sta->type;
1683
1684         if (!iwl_mvm_has_new_tx_api(mvm))
1685                 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1686         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1687
1688         if (addr)
1689                 memcpy(cmd.addr, addr, ETH_ALEN);
1690
1691         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1692                                           iwl_mvm_add_sta_cmd_size(mvm),
1693                                           &cmd, &status);
1694         if (ret)
1695                 return ret;
1696
1697         switch (status & IWL_ADD_STA_STATUS_MASK) {
1698         case ADD_STA_SUCCESS:
1699                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1700                 return 0;
1701         default:
1702                 ret = -EIO;
1703                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1704                         status);
1705                 break;
1706         }
1707         return ret;
1708 }
1709
1710 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1711                     struct ieee80211_vif *vif,
1712                     struct ieee80211_sta *sta)
1713 {
1714         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1715         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1716         struct iwl_mvm_rxq_dup_data *dup_data;
1717         int i, ret, sta_id;
1718         bool sta_update = false;
1719         unsigned int sta_flags = 0;
1720
1721         lockdep_assert_held(&mvm->mutex);
1722
1723         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1724                 sta_id = iwl_mvm_find_free_sta_id(mvm,
1725                                                   ieee80211_vif_type_p2p(vif));
1726         else
1727                 sta_id = mvm_sta->sta_id;
1728
1729         if (sta_id == IWL_MVM_INVALID_STA)
1730                 return -ENOSPC;
1731
1732         spin_lock_init(&mvm_sta->lock);
1733
1734         /* if this is a HW restart re-alloc existing queues */
1735         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1736                 struct iwl_mvm_int_sta tmp_sta = {
1737                         .sta_id = sta_id,
1738                         .type = mvm_sta->sta_type,
1739                 };
1740
1741                 /*
1742                  * First add an empty station since allocating
1743                  * a queue requires a valid station
1744                  */
1745                 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1746                                                  mvmvif->id, mvmvif->color);
1747                 if (ret)
1748                         goto err;
1749
1750                 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1751                 sta_update = true;
1752                 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1753                 goto update_fw;
1754         }
1755
1756         mvm_sta->sta_id = sta_id;
1757         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1758                                                       mvmvif->color);
1759         mvm_sta->vif = vif;
1760         if (!mvm->trans->cfg->gen2)
1761                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1762         else
1763                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1764         mvm_sta->tx_protection = 0;
1765         mvm_sta->tt_tx_protection = false;
1766         mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1767
1768         /* HW restart, don't assume the memory has been zeroed */
1769         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1770         mvm_sta->tfd_queue_msk = 0;
1771
1772         /* for HW restart - reset everything but the sequence number */
1773         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1774                 u16 seq = mvm_sta->tid_data[i].seq_number;
1775                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1776                 mvm_sta->tid_data[i].seq_number = seq;
1777
1778                 /*
1779                  * Mark all queues for this STA as unallocated and defer TX
1780                  * frames until the queue is allocated
1781                  */
1782                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1783                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1784         }
1785         mvm_sta->deferred_traffic_tid_map = 0;
1786         mvm_sta->agg_tids = 0;
1787
1788         if (iwl_mvm_has_new_rx_api(mvm) &&
1789             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1790                 int q;
1791
1792                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1793                                    sizeof(*dup_data), GFP_KERNEL);
1794                 if (!dup_data)
1795                         return -ENOMEM;
1796                 /*
1797                  * Initialize all the last_seq values to 0xffff which can never
1798                  * compare equal to the frame's seq_ctrl in the check in
1799                  * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1800                  * number and fragmented packets don't reach that function.
1801                  *
1802                  * This thus allows receiving a packet with seqno 0 and the
1803                  * retry bit set as the very first packet on a new TID.
1804                  */
1805                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1806                         memset(dup_data[q].last_seq, 0xff,
1807                                sizeof(dup_data[q].last_seq));
1808                 mvm_sta->dup_data = dup_data;
1809         }
1810
1811         if (!iwl_mvm_has_new_tx_api(mvm)) {
1812                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1813                                                  ieee80211_vif_type_p2p(vif));
1814                 if (ret)
1815                         goto err;
1816         }
1817
1818         /*
1819          * if rs is registered with mac80211, then "add station" will be handled
1820          * via the corresponding ops, otherwise need to notify rate scaling here
1821          */
1822         if (iwl_mvm_has_tlc_offload(mvm))
1823                 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1824
1825 update_fw:
1826         ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1827         if (ret)
1828                 goto err;
1829
1830         if (vif->type == NL80211_IFTYPE_STATION) {
1831                 if (!sta->tdls) {
1832                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1833                         mvmvif->ap_sta_id = sta_id;
1834                 } else {
1835                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1836                 }
1837         }
1838
1839         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1840
1841         return 0;
1842
1843 err:
1844         return ret;
1845 }
1846
1847 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1848                       bool drain)
1849 {
1850         struct iwl_mvm_add_sta_cmd cmd = {};
1851         int ret;
1852         u32 status;
1853
1854         lockdep_assert_held(&mvm->mutex);
1855
1856         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1857         cmd.sta_id = mvmsta->sta_id;
1858         cmd.add_modify = STA_MODE_MODIFY;
1859         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1860         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1861
1862         status = ADD_STA_SUCCESS;
1863         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1864                                           iwl_mvm_add_sta_cmd_size(mvm),
1865                                           &cmd, &status);
1866         if (ret)
1867                 return ret;
1868
1869         switch (status & IWL_ADD_STA_STATUS_MASK) {
1870         case ADD_STA_SUCCESS:
1871                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1872                                mvmsta->sta_id);
1873                 break;
1874         default:
1875                 ret = -EIO;
1876                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1877                         mvmsta->sta_id);
1878                 break;
1879         }
1880
1881         return ret;
1882 }
1883
1884 /*
1885  * Remove a station from the FW table. Before sending the command to remove
1886  * the station validate that the station is indeed known to the driver (sanity
1887  * only).
1888  */
1889 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1890 {
1891         struct ieee80211_sta *sta;
1892         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1893                 .sta_id = sta_id,
1894         };
1895         int ret;
1896
1897         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1898                                         lockdep_is_held(&mvm->mutex));
1899
1900         /* Note: internal stations are marked as error values */
1901         if (!sta) {
1902                 IWL_ERR(mvm, "Invalid station id\n");
1903                 return -EINVAL;
1904         }
1905
1906         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1907                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1908         if (ret) {
1909                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1910                 return ret;
1911         }
1912
1913         return 0;
1914 }
1915
1916 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1917                                        struct ieee80211_vif *vif,
1918                                        struct iwl_mvm_sta *mvm_sta)
1919 {
1920         int ac;
1921         int i;
1922
1923         lockdep_assert_held(&mvm->mutex);
1924
1925         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1926                 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1927                         continue;
1928
1929                 ac = iwl_mvm_tid_to_ac_queue(i);
1930                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1931                                     vif->hw_queue[ac], i, 0);
1932                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1933         }
1934 }
1935
1936 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1937                                   struct iwl_mvm_sta *mvm_sta)
1938 {
1939         int i;
1940
1941         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1942                 u16 txq_id;
1943                 int ret;
1944
1945                 spin_lock_bh(&mvm_sta->lock);
1946                 txq_id = mvm_sta->tid_data[i].txq_id;
1947                 spin_unlock_bh(&mvm_sta->lock);
1948
1949                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1950                         continue;
1951
1952                 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1953                 if (ret)
1954                         return ret;
1955         }
1956
1957         return 0;
1958 }
1959
1960 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1961                    struct ieee80211_vif *vif,
1962                    struct ieee80211_sta *sta)
1963 {
1964         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1965         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1966         u8 sta_id = mvm_sta->sta_id;
1967         int ret;
1968
1969         lockdep_assert_held(&mvm->mutex);
1970
1971         if (iwl_mvm_has_new_rx_api(mvm))
1972                 kfree(mvm_sta->dup_data);
1973
1974         ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1975         if (ret)
1976                 return ret;
1977
1978         /* flush its queues here since we are freeing mvm_sta */
1979         ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1980         if (ret)
1981                 return ret;
1982         if (iwl_mvm_has_new_tx_api(mvm)) {
1983                 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1984         } else {
1985                 u32 q_mask = mvm_sta->tfd_queue_msk;
1986
1987                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1988                                                      q_mask);
1989         }
1990         if (ret)
1991                 return ret;
1992
1993         ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1994
1995         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1996
1997         /* If there is a TXQ still marked as reserved - free it */
1998         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1999                 u8 reserved_txq = mvm_sta->reserved_queue;
2000                 enum iwl_mvm_queue_status *status;
2001
2002                 /*
2003                  * If no traffic has gone through the reserved TXQ - it
2004                  * is still marked as IWL_MVM_QUEUE_RESERVED, and
2005                  * should be manually marked as free again
2006                  */
2007                 spin_lock_bh(&mvm->queue_info_lock);
2008                 status = &mvm->queue_info[reserved_txq].status;
2009                 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
2010                          (*status != IWL_MVM_QUEUE_FREE),
2011                          "sta_id %d reserved txq %d status %d",
2012                          sta_id, reserved_txq, *status)) {
2013                         spin_unlock_bh(&mvm->queue_info_lock);
2014                         return -EINVAL;
2015                 }
2016
2017                 *status = IWL_MVM_QUEUE_FREE;
2018                 spin_unlock_bh(&mvm->queue_info_lock);
2019         }
2020
2021         if (vif->type == NL80211_IFTYPE_STATION &&
2022             mvmvif->ap_sta_id == sta_id) {
2023                 /* if associated - we can't remove the AP STA now */
2024                 if (vif->bss_conf.assoc)
2025                         return ret;
2026
2027                 /* unassoc - go ahead - remove the AP STA now */
2028                 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
2029
2030                 /* clear d0i3_ap_sta_id if no longer relevant */
2031                 if (mvm->d0i3_ap_sta_id == sta_id)
2032                         mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
2033         }
2034
2035         /*
2036          * This shouldn't happen - the TDLS channel switch should be canceled
2037          * before the STA is removed.
2038          */
2039         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
2040                 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
2041                 cancel_delayed_work(&mvm->tdls_cs.dwork);
2042         }
2043
2044         /*
2045          * Make sure that the tx response code sees the station as -EBUSY and
2046          * calls the drain worker.
2047          */
2048         spin_lock_bh(&mvm_sta->lock);
2049         spin_unlock_bh(&mvm_sta->lock);
2050
2051         ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
2052         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
2053
2054         return ret;
2055 }
2056
2057 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
2058                       struct ieee80211_vif *vif,
2059                       u8 sta_id)
2060 {
2061         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
2062
2063         lockdep_assert_held(&mvm->mutex);
2064
2065         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
2066         return ret;
2067 }
2068
2069 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
2070                              struct iwl_mvm_int_sta *sta,
2071                              u32 qmask, enum nl80211_iftype iftype,
2072                              enum iwl_sta_type type)
2073 {
2074         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
2075             sta->sta_id == IWL_MVM_INVALID_STA) {
2076                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
2077                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
2078                         return -ENOSPC;
2079         }
2080
2081         sta->tfd_queue_msk = qmask;
2082         sta->type = type;
2083
2084         /* put a non-NULL value so iterating over the stations won't stop */
2085         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
2086         return 0;
2087 }
2088
2089 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
2090 {
2091         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
2092         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
2093         sta->sta_id = IWL_MVM_INVALID_STA;
2094 }
2095
2096 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue,
2097                                           u8 sta_id, u8 fifo)
2098 {
2099         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
2100                                         mvm->cfg->base_params->wd_timeout :
2101                                         IWL_WATCHDOG_DISABLED;
2102
2103         if (iwl_mvm_has_new_tx_api(mvm)) {
2104                 int tvqm_queue =
2105                         iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id,
2106                                                 IWL_MAX_TID_COUNT,
2107                                                 wdg_timeout);
2108                 *queue = tvqm_queue;
2109         } else {
2110                 struct iwl_trans_txq_scd_cfg cfg = {
2111                         .fifo = fifo,
2112                         .sta_id = sta_id,
2113                         .tid = IWL_MAX_TID_COUNT,
2114                         .aggregate = false,
2115                         .frame_limit = IWL_FRAME_LIMIT,
2116                 };
2117
2118                 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout);
2119         }
2120 }
2121
2122 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
2123 {
2124         int ret;
2125
2126         lockdep_assert_held(&mvm->mutex);
2127
2128         /* Allocate aux station and assign to it the aux queue */
2129         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
2130                                        NL80211_IFTYPE_UNSPECIFIED,
2131                                        IWL_STA_AUX_ACTIVITY);
2132         if (ret)
2133                 return ret;
2134
2135         /* Map Aux queue to fifo - needs to happen before adding Aux station */
2136         if (!iwl_mvm_has_new_tx_api(mvm))
2137                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
2138                                               mvm->aux_sta.sta_id,
2139                                               IWL_MVM_TX_FIFO_MCAST);
2140
2141         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
2142                                          MAC_INDEX_AUX, 0);
2143         if (ret) {
2144                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2145                 return ret;
2146         }
2147
2148         /*
2149          * For 22000 firmware and on we cannot add queue to a station unknown
2150          * to firmware so enable queue here - after the station was added
2151          */
2152         if (iwl_mvm_has_new_tx_api(mvm))
2153                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
2154                                               mvm->aux_sta.sta_id,
2155                                               IWL_MVM_TX_FIFO_MCAST);
2156
2157         return 0;
2158 }
2159
2160 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2161 {
2162         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2163         int ret;
2164
2165         lockdep_assert_held(&mvm->mutex);
2166
2167         /* Map snif queue to fifo - must happen before adding snif station */
2168         if (!iwl_mvm_has_new_tx_api(mvm))
2169                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
2170                                               mvm->snif_sta.sta_id,
2171                                               IWL_MVM_TX_FIFO_BE);
2172
2173         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
2174                                          mvmvif->id, 0);
2175         if (ret)
2176                 return ret;
2177
2178         /*
2179          * For 22000 firmware and on we cannot add queue to a station unknown
2180          * to firmware so enable queue here - after the station was added
2181          */
2182         if (iwl_mvm_has_new_tx_api(mvm))
2183                 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
2184                                               mvm->snif_sta.sta_id,
2185                                               IWL_MVM_TX_FIFO_BE);
2186
2187         return 0;
2188 }
2189
2190 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2191 {
2192         int ret;
2193
2194         lockdep_assert_held(&mvm->mutex);
2195
2196         iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue,
2197                             IWL_MAX_TID_COUNT, 0);
2198         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2199         if (ret)
2200                 IWL_WARN(mvm, "Failed sending remove station\n");
2201
2202         return ret;
2203 }
2204
2205 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2206 {
2207         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2208 }
2209
2210 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
2211 {
2212         lockdep_assert_held(&mvm->mutex);
2213
2214         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2215 }
2216
2217 /*
2218  * Send the add station command for the vif's broadcast station.
2219  * Assumes that the station was already allocated.
2220  *
2221  * @mvm: the mvm component
2222  * @vif: the interface to which the broadcast station is added
2223  * @bsta: the broadcast station to add.
2224  */
2225 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2226 {
2227         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2228         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2229         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2230         const u8 *baddr = _baddr;
2231         int queue;
2232         int ret;
2233         unsigned int wdg_timeout =
2234                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2235         struct iwl_trans_txq_scd_cfg cfg = {
2236                 .fifo = IWL_MVM_TX_FIFO_VO,
2237                 .sta_id = mvmvif->bcast_sta.sta_id,
2238                 .tid = IWL_MAX_TID_COUNT,
2239                 .aggregate = false,
2240                 .frame_limit = IWL_FRAME_LIMIT,
2241         };
2242
2243         lockdep_assert_held(&mvm->mutex);
2244
2245         if (!iwl_mvm_has_new_tx_api(mvm)) {
2246                 if (vif->type == NL80211_IFTYPE_AP ||
2247                     vif->type == NL80211_IFTYPE_ADHOC)
2248                         queue = mvm->probe_queue;
2249                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2250                         queue = mvm->p2p_dev_queue;
2251                 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
2252                         return -EINVAL;
2253
2254                 bsta->tfd_queue_msk |= BIT(queue);
2255
2256                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
2257                                    &cfg, wdg_timeout);
2258         }
2259
2260         if (vif->type == NL80211_IFTYPE_ADHOC)
2261                 baddr = vif->bss_conf.bssid;
2262
2263         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2264                 return -ENOSPC;
2265
2266         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2267                                          mvmvif->id, mvmvif->color);
2268         if (ret)
2269                 return ret;
2270
2271         /*
2272          * For 22000 firmware and on we cannot add queue to a station unknown
2273          * to firmware so enable queue here - after the station was added
2274          */
2275         if (iwl_mvm_has_new_tx_api(mvm)) {
2276                 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
2277                                                 bsta->sta_id,
2278                                                 IWL_MAX_TID_COUNT,
2279                                                 wdg_timeout);
2280
2281                 if (vif->type == NL80211_IFTYPE_AP ||
2282                     vif->type == NL80211_IFTYPE_ADHOC)
2283                         mvm->probe_queue = queue;
2284                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2285                         mvm->p2p_dev_queue = queue;
2286         }
2287
2288         return 0;
2289 }
2290
2291 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2292                                           struct ieee80211_vif *vif)
2293 {
2294         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2295         int queue;
2296
2297         lockdep_assert_held(&mvm->mutex);
2298
2299         iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
2300
2301         switch (vif->type) {
2302         case NL80211_IFTYPE_AP:
2303         case NL80211_IFTYPE_ADHOC:
2304                 queue = mvm->probe_queue;
2305                 break;
2306         case NL80211_IFTYPE_P2P_DEVICE:
2307                 queue = mvm->p2p_dev_queue;
2308                 break;
2309         default:
2310                 WARN(1, "Can't free bcast queue on vif type %d\n",
2311                      vif->type);
2312                 return;
2313         }
2314
2315         iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
2316         if (iwl_mvm_has_new_tx_api(mvm))
2317                 return;
2318
2319         WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2320         mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2321 }
2322
2323 /* Send the FW a request to remove the station from it's internal data
2324  * structures, but DO NOT remove the entry from the local data structures. */
2325 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2326 {
2327         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2328         int ret;
2329
2330         lockdep_assert_held(&mvm->mutex);
2331
2332         iwl_mvm_free_bcast_sta_queues(mvm, vif);
2333
2334         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2335         if (ret)
2336                 IWL_WARN(mvm, "Failed sending remove station\n");
2337         return ret;
2338 }
2339
2340 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2341 {
2342         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2343
2344         lockdep_assert_held(&mvm->mutex);
2345
2346         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
2347                                         ieee80211_vif_type_p2p(vif),
2348                                         IWL_STA_GENERAL_PURPOSE);
2349 }
2350
2351 /* Allocate a new station entry for the broadcast station to the given vif,
2352  * and send it to the FW.
2353  * Note that each P2P mac should have its own broadcast station.
2354  *
2355  * @mvm: the mvm component
2356  * @vif: the interface to which the broadcast station is added
2357  * @bsta: the broadcast station to add. */
2358 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2359 {
2360         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2361         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2362         int ret;
2363
2364         lockdep_assert_held(&mvm->mutex);
2365
2366         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2367         if (ret)
2368                 return ret;
2369
2370         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2371
2372         if (ret)
2373                 iwl_mvm_dealloc_int_sta(mvm, bsta);
2374
2375         return ret;
2376 }
2377
2378 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2379 {
2380         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2381
2382         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2383 }
2384
2385 /*
2386  * Send the FW a request to remove the station from it's internal data
2387  * structures, and in addition remove it from the local data structure.
2388  */
2389 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2390 {
2391         int ret;
2392
2393         lockdep_assert_held(&mvm->mutex);
2394
2395         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2396
2397         iwl_mvm_dealloc_bcast_sta(mvm, vif);
2398
2399         return ret;
2400 }
2401
2402 /*
2403  * Allocate a new station entry for the multicast station to the given vif,
2404  * and send it to the FW.
2405  * Note that each AP/GO mac should have its own multicast station.
2406  *
2407  * @mvm: the mvm component
2408  * @vif: the interface to which the multicast station is added
2409  */
2410 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2411 {
2412         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2413         struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2414         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2415         const u8 *maddr = _maddr;
2416         struct iwl_trans_txq_scd_cfg cfg = {
2417                 .fifo = IWL_MVM_TX_FIFO_MCAST,
2418                 .sta_id = msta->sta_id,
2419                 .tid = 0,
2420                 .aggregate = false,
2421                 .frame_limit = IWL_FRAME_LIMIT,
2422         };
2423         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2424         int ret;
2425
2426         lockdep_assert_held(&mvm->mutex);
2427
2428         if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2429                     vif->type != NL80211_IFTYPE_ADHOC))
2430                 return -ENOTSUPP;
2431
2432         /*
2433          * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2434          * invalid, so make sure we use the queue we want.
2435          * Note that this is done here as we want to avoid making DQA
2436          * changes in mac80211 layer.
2437          */
2438         if (vif->type == NL80211_IFTYPE_ADHOC) {
2439                 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2440                 mvmvif->cab_queue = vif->cab_queue;
2441         }
2442
2443         /*
2444          * While in previous FWs we had to exclude cab queue from TFD queue
2445          * mask, now it is needed as any other queue.
2446          */
2447         if (!iwl_mvm_has_new_tx_api(mvm) &&
2448             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2449                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2450                                    &cfg, timeout);
2451                 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2452         }
2453         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2454                                          mvmvif->id, mvmvif->color);
2455         if (ret) {
2456                 iwl_mvm_dealloc_int_sta(mvm, msta);
2457                 return ret;
2458         }
2459
2460         /*
2461          * Enable cab queue after the ADD_STA command is sent.
2462          * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2463          * command with unknown station id, and for FW that doesn't support
2464          * station API since the cab queue is not included in the
2465          * tfd_queue_mask.
2466          */
2467         if (iwl_mvm_has_new_tx_api(mvm)) {
2468                 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2469                                                     msta->sta_id,
2470                                                     0,
2471                                                     timeout);
2472                 mvmvif->cab_queue = queue;
2473         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2474                                IWL_UCODE_TLV_API_STA_TYPE))
2475                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2476                                    &cfg, timeout);
2477
2478         if (mvmvif->ap_wep_key) {
2479                 u8 key_offset = iwl_mvm_set_fw_key_idx(mvm);
2480
2481                 if (key_offset == STA_KEY_IDX_INVALID)
2482                         return -ENOSPC;
2483
2484                 ret = iwl_mvm_send_sta_key(mvm, mvmvif->mcast_sta.sta_id,
2485                                            mvmvif->ap_wep_key, 1, 0, NULL, 0,
2486                                            key_offset, 0);
2487                 if (ret)
2488                         return ret;
2489         }
2490
2491         return 0;
2492 }
2493
2494 /*
2495  * Send the FW a request to remove the station from it's internal data
2496  * structures, and in addition remove it from the local data structure.
2497  */
2498 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2499 {
2500         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2501         int ret;
2502
2503         lockdep_assert_held(&mvm->mutex);
2504
2505         iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2506
2507         iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2508                             0, 0);
2509
2510         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2511         if (ret)
2512                 IWL_WARN(mvm, "Failed sending remove station\n");
2513
2514         return ret;
2515 }
2516
2517 #define IWL_MAX_RX_BA_SESSIONS 16
2518
2519 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2520 {
2521         struct iwl_mvm_delba_notif notif = {
2522                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2523                 .metadata.sync = 1,
2524                 .delba.baid = baid,
2525         };
2526         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2527 };
2528
2529 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2530                                  struct iwl_mvm_baid_data *data)
2531 {
2532         int i;
2533
2534         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2535
2536         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2537                 int j;
2538                 struct iwl_mvm_reorder_buffer *reorder_buf =
2539                         &data->reorder_buf[i];
2540                 struct iwl_mvm_reorder_buf_entry *entries =
2541                         &data->entries[i * data->entries_per_queue];
2542
2543                 spin_lock_bh(&reorder_buf->lock);
2544                 if (likely(!reorder_buf->num_stored)) {
2545                         spin_unlock_bh(&reorder_buf->lock);
2546                         continue;
2547                 }
2548
2549                 /*
2550                  * This shouldn't happen in regular DELBA since the internal
2551                  * delBA notification should trigger a release of all frames in
2552                  * the reorder buffer.
2553                  */
2554                 WARN_ON(1);
2555
2556                 for (j = 0; j < reorder_buf->buf_size; j++)
2557                         __skb_queue_purge(&entries[j].e.frames);
2558                 /*
2559                  * Prevent timer re-arm. This prevents a very far fetched case
2560                  * where we timed out on the notification. There may be prior
2561                  * RX frames pending in the RX queue before the notification
2562                  * that might get processed between now and the actual deletion
2563                  * and we would re-arm the timer although we are deleting the
2564                  * reorder buffer.
2565                  */
2566                 reorder_buf->removed = true;
2567                 spin_unlock_bh(&reorder_buf->lock);
2568                 del_timer_sync(&reorder_buf->reorder_timer);
2569         }
2570 }
2571
2572 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2573                                         struct iwl_mvm_baid_data *data,
2574                                         u16 ssn, u16 buf_size)
2575 {
2576         int i;
2577
2578         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2579                 struct iwl_mvm_reorder_buffer *reorder_buf =
2580                         &data->reorder_buf[i];
2581                 struct iwl_mvm_reorder_buf_entry *entries =
2582                         &data->entries[i * data->entries_per_queue];
2583                 int j;
2584
2585                 reorder_buf->num_stored = 0;
2586                 reorder_buf->head_sn = ssn;
2587                 reorder_buf->buf_size = buf_size;
2588                 /* rx reorder timer */
2589                 timer_setup(&reorder_buf->reorder_timer,
2590                             iwl_mvm_reorder_timer_expired, 0);
2591                 spin_lock_init(&reorder_buf->lock);
2592                 reorder_buf->mvm = mvm;
2593                 reorder_buf->queue = i;
2594                 reorder_buf->valid = false;
2595                 for (j = 0; j < reorder_buf->buf_size; j++)
2596                         __skb_queue_head_init(&entries[j].e.frames);
2597         }
2598 }
2599
2600 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2601                        int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2602 {
2603         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2604         struct iwl_mvm_add_sta_cmd cmd = {};
2605         struct iwl_mvm_baid_data *baid_data = NULL;
2606         int ret;
2607         u32 status;
2608
2609         lockdep_assert_held(&mvm->mutex);
2610
2611         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2612                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2613                 return -ENOSPC;
2614         }
2615
2616         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2617                 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2618
2619                 /* sparse doesn't like the __align() so don't check */
2620 #ifndef __CHECKER__
2621                 /*
2622                  * The division below will be OK if either the cache line size
2623                  * can be divided by the entry size (ALIGN will round up) or if
2624                  * if the entry size can be divided by the cache line size, in
2625                  * which case the ALIGN() will do nothing.
2626                  */
2627                 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2628                              sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2629 #endif
2630
2631                 /*
2632                  * Upward align the reorder buffer size to fill an entire cache
2633                  * line for each queue, to avoid sharing cache lines between
2634                  * different queues.
2635                  */
2636                 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2637
2638                 /*
2639                  * Allocate here so if allocation fails we can bail out early
2640                  * before starting the BA session in the firmware
2641                  */
2642                 baid_data = kzalloc(sizeof(*baid_data) +
2643                                     mvm->trans->num_rx_queues *
2644                                     reorder_buf_size,
2645                                     GFP_KERNEL);
2646                 if (!baid_data)
2647                         return -ENOMEM;
2648
2649                 /*
2650                  * This division is why we need the above BUILD_BUG_ON(),
2651                  * if that doesn't hold then this will not be right.
2652                  */
2653                 baid_data->entries_per_queue =
2654                         reorder_buf_size / sizeof(baid_data->entries[0]);
2655         }
2656
2657         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2658         cmd.sta_id = mvm_sta->sta_id;
2659         cmd.add_modify = STA_MODE_MODIFY;
2660         if (start) {
2661                 cmd.add_immediate_ba_tid = (u8) tid;
2662                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2663                 cmd.rx_ba_window = cpu_to_le16(buf_size);
2664         } else {
2665                 cmd.remove_immediate_ba_tid = (u8) tid;
2666         }
2667         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2668                                   STA_MODIFY_REMOVE_BA_TID;
2669
2670         status = ADD_STA_SUCCESS;
2671         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2672                                           iwl_mvm_add_sta_cmd_size(mvm),
2673                                           &cmd, &status);
2674         if (ret)
2675                 goto out_free;
2676
2677         switch (status & IWL_ADD_STA_STATUS_MASK) {
2678         case ADD_STA_SUCCESS:
2679                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2680                              start ? "start" : "stopp");
2681                 break;
2682         case ADD_STA_IMMEDIATE_BA_FAILURE:
2683                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2684                 ret = -ENOSPC;
2685                 break;
2686         default:
2687                 ret = -EIO;
2688                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2689                         start ? "start" : "stopp", status);
2690                 break;
2691         }
2692
2693         if (ret)
2694                 goto out_free;
2695
2696         if (start) {
2697                 u8 baid;
2698
2699                 mvm->rx_ba_sessions++;
2700
2701                 if (!iwl_mvm_has_new_rx_api(mvm))
2702                         return 0;
2703
2704                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2705                         ret = -EINVAL;
2706                         goto out_free;
2707                 }
2708                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2709                             IWL_ADD_STA_BAID_SHIFT);
2710                 baid_data->baid = baid;
2711                 baid_data->timeout = timeout;
2712                 baid_data->last_rx = jiffies;
2713                 baid_data->rcu_ptr = &mvm->baid_map[baid];
2714                 timer_setup(&baid_data->session_timer,
2715                             iwl_mvm_rx_agg_session_expired, 0);
2716                 baid_data->mvm = mvm;
2717                 baid_data->tid = tid;
2718                 baid_data->sta_id = mvm_sta->sta_id;
2719
2720                 mvm_sta->tid_to_baid[tid] = baid;
2721                 if (timeout)
2722                         mod_timer(&baid_data->session_timer,
2723                                   TU_TO_EXP_TIME(timeout * 2));
2724
2725                 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2726                 /*
2727                  * protect the BA data with RCU to cover a case where our
2728                  * internal RX sync mechanism will timeout (not that it's
2729                  * supposed to happen) and we will free the session data while
2730                  * RX is being processed in parallel
2731                  */
2732                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2733                              mvm_sta->sta_id, tid, baid);
2734                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2735                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2736         } else  {
2737                 u8 baid = mvm_sta->tid_to_baid[tid];
2738
2739                 if (mvm->rx_ba_sessions > 0)
2740                         /* check that restart flow didn't zero the counter */
2741                         mvm->rx_ba_sessions--;
2742                 if (!iwl_mvm_has_new_rx_api(mvm))
2743                         return 0;
2744
2745                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2746                         return -EINVAL;
2747
2748                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2749                 if (WARN_ON(!baid_data))
2750                         return -EINVAL;
2751
2752                 /* synchronize all rx queues so we can safely delete */
2753                 iwl_mvm_free_reorder(mvm, baid_data);
2754                 del_timer_sync(&baid_data->session_timer);
2755                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2756                 kfree_rcu(baid_data, rcu_head);
2757                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2758         }
2759         return 0;
2760
2761 out_free:
2762         kfree(baid_data);
2763         return ret;
2764 }
2765
2766 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2767                        int tid, u8 queue, bool start)
2768 {
2769         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2770         struct iwl_mvm_add_sta_cmd cmd = {};
2771         int ret;
2772         u32 status;
2773
2774         lockdep_assert_held(&mvm->mutex);
2775
2776         if (start) {
2777                 mvm_sta->tfd_queue_msk |= BIT(queue);
2778                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2779         } else {
2780                 /* In DQA-mode the queue isn't removed on agg termination */
2781                 mvm_sta->tid_disable_agg |= BIT(tid);
2782         }
2783
2784         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2785         cmd.sta_id = mvm_sta->sta_id;
2786         cmd.add_modify = STA_MODE_MODIFY;
2787         if (!iwl_mvm_has_new_tx_api(mvm))
2788                 cmd.modify_mask = STA_MODIFY_QUEUES;
2789         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2790         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2791         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2792
2793         status = ADD_STA_SUCCESS;
2794         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2795                                           iwl_mvm_add_sta_cmd_size(mvm),
2796                                           &cmd, &status);
2797         if (ret)
2798                 return ret;
2799
2800         switch (status & IWL_ADD_STA_STATUS_MASK) {
2801         case ADD_STA_SUCCESS:
2802                 break;
2803         default:
2804                 ret = -EIO;
2805                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2806                         start ? "start" : "stopp", status);
2807                 break;
2808         }
2809
2810         return ret;
2811 }
2812
2813 const u8 tid_to_mac80211_ac[] = {
2814         IEEE80211_AC_BE,
2815         IEEE80211_AC_BK,
2816         IEEE80211_AC_BK,
2817         IEEE80211_AC_BE,
2818         IEEE80211_AC_VI,
2819         IEEE80211_AC_VI,
2820         IEEE80211_AC_VO,
2821         IEEE80211_AC_VO,
2822         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2823 };
2824
2825 static const u8 tid_to_ucode_ac[] = {
2826         AC_BE,
2827         AC_BK,
2828         AC_BK,
2829         AC_BE,
2830         AC_VI,
2831         AC_VI,
2832         AC_VO,
2833         AC_VO,
2834 };
2835
2836 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2837                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2838 {
2839         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2840         struct iwl_mvm_tid_data *tid_data;
2841         u16 normalized_ssn;
2842         int txq_id;
2843         int ret;
2844
2845         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2846                 return -EINVAL;
2847
2848         if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2849             mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2850                 IWL_ERR(mvm,
2851                         "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2852                         mvmsta->tid_data[tid].state);
2853                 return -ENXIO;
2854         }
2855
2856         lockdep_assert_held(&mvm->mutex);
2857
2858         if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2859             iwl_mvm_has_new_tx_api(mvm)) {
2860                 u8 ac = tid_to_mac80211_ac[tid];
2861
2862                 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2863                 if (ret)
2864                         return ret;
2865         }
2866
2867         spin_lock_bh(&mvmsta->lock);
2868
2869         /* possible race condition - we entered D0i3 while starting agg */
2870         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2871                 spin_unlock_bh(&mvmsta->lock);
2872                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2873                 return -EIO;
2874         }
2875
2876         spin_lock(&mvm->queue_info_lock);
2877
2878         /*
2879          * Note the possible cases:
2880          *  1. An enabled TXQ - TXQ needs to become agg'ed
2881          *  2. The TXQ hasn't yet been enabled, so find a free one and mark
2882          *      it as reserved
2883          */
2884         txq_id = mvmsta->tid_data[tid].txq_id;
2885         if (txq_id == IWL_MVM_INVALID_QUEUE) {
2886                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2887                                                  IWL_MVM_DQA_MIN_DATA_QUEUE,
2888                                                  IWL_MVM_DQA_MAX_DATA_QUEUE);
2889                 if (txq_id < 0) {
2890                         ret = txq_id;
2891                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2892                         goto release_locks;
2893                 }
2894
2895                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2896                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2897         } else if (unlikely(mvm->queue_info[txq_id].status ==
2898                             IWL_MVM_QUEUE_SHARED)) {
2899                 ret = -ENXIO;
2900                 IWL_DEBUG_TX_QUEUES(mvm,
2901                                     "Can't start tid %d agg on shared queue!\n",
2902                                     tid);
2903                 goto release_locks;
2904         }
2905
2906         spin_unlock(&mvm->queue_info_lock);
2907
2908         IWL_DEBUG_TX_QUEUES(mvm,
2909                             "AGG for tid %d will be on queue #%d\n",
2910                             tid, txq_id);
2911
2912         tid_data = &mvmsta->tid_data[tid];
2913         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2914         tid_data->txq_id = txq_id;
2915         *ssn = tid_data->ssn;
2916
2917         IWL_DEBUG_TX_QUEUES(mvm,
2918                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2919                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2920                             tid_data->next_reclaimed);
2921
2922         /*
2923          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2924          * to align the wrap around of ssn so we compare relevant values.
2925          */
2926         normalized_ssn = tid_data->ssn;
2927         if (mvm->trans->cfg->gen2)
2928                 normalized_ssn &= 0xff;
2929
2930         if (normalized_ssn == tid_data->next_reclaimed) {
2931                 tid_data->state = IWL_AGG_STARTING;
2932                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2933         } else {
2934                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2935         }
2936
2937         ret = 0;
2938         goto out;
2939
2940 release_locks:
2941         spin_unlock(&mvm->queue_info_lock);
2942 out:
2943         spin_unlock_bh(&mvmsta->lock);
2944
2945         return ret;
2946 }
2947
2948 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2949                             struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2950                             bool amsdu)
2951 {
2952         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2953         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2954         unsigned int wdg_timeout =
2955                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2956         int queue, ret;
2957         bool alloc_queue = true;
2958         enum iwl_mvm_queue_status queue_status;
2959         u16 ssn;
2960
2961         struct iwl_trans_txq_scd_cfg cfg = {
2962                 .sta_id = mvmsta->sta_id,
2963                 .tid = tid,
2964                 .frame_limit = buf_size,
2965                 .aggregate = true,
2966         };
2967
2968         /*
2969          * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2970          * manager, so this function should never be called in this case.
2971          */
2972         if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2973                 return -EINVAL;
2974
2975         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2976                      != IWL_MAX_TID_COUNT);
2977
2978         spin_lock_bh(&mvmsta->lock);
2979         ssn = tid_data->ssn;
2980         queue = tid_data->txq_id;
2981         tid_data->state = IWL_AGG_ON;
2982         mvmsta->agg_tids |= BIT(tid);
2983         tid_data->ssn = 0xffff;
2984         tid_data->amsdu_in_ampdu_allowed = amsdu;
2985         spin_unlock_bh(&mvmsta->lock);
2986
2987         if (iwl_mvm_has_new_tx_api(mvm)) {
2988                 /*
2989                  * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2990                  * would have failed, so if we are here there is no need to
2991                  * allocate a queue.
2992                  * However, if aggregation size is different than the default
2993                  * size, the scheduler should be reconfigured.
2994                  * We cannot do this with the new TX API, so return unsupported
2995                  * for now, until it will be offloaded to firmware..
2996                  * Note that if SCD default value changes - this condition
2997                  * should be updated as well.
2998                  */
2999                 if (buf_size < IWL_FRAME_LIMIT)
3000                         return -ENOTSUPP;
3001
3002                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3003                 if (ret)
3004                         return -EIO;
3005                 goto out;
3006         }
3007
3008         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
3009
3010         spin_lock_bh(&mvm->queue_info_lock);
3011         queue_status = mvm->queue_info[queue].status;
3012         spin_unlock_bh(&mvm->queue_info_lock);
3013
3014         /* Maybe there is no need to even alloc a queue... */
3015         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
3016                 alloc_queue = false;
3017
3018         /*
3019          * Only reconfig the SCD for the queue if the window size has
3020          * changed from current (become smaller)
3021          */
3022         if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
3023                 /*
3024                  * If reconfiguring an existing queue, it first must be
3025                  * drained
3026                  */
3027                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
3028                                                      BIT(queue));
3029                 if (ret) {
3030                         IWL_ERR(mvm,
3031                                 "Error draining queue before reconfig\n");
3032                         return ret;
3033                 }
3034
3035                 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3036                                            mvmsta->sta_id, tid,
3037                                            buf_size, ssn);
3038                 if (ret) {
3039                         IWL_ERR(mvm,
3040                                 "Error reconfiguring TXQ #%d\n", queue);
3041                         return ret;
3042                 }
3043         }
3044
3045         if (alloc_queue)
3046                 iwl_mvm_enable_txq(mvm, queue,
3047                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
3048                                    &cfg, wdg_timeout);
3049
3050         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
3051         if (queue_status != IWL_MVM_QUEUE_SHARED) {
3052                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3053                 if (ret)
3054                         return -EIO;
3055         }
3056
3057         /* No need to mark as reserved */
3058         spin_lock_bh(&mvm->queue_info_lock);
3059         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3060         spin_unlock_bh(&mvm->queue_info_lock);
3061
3062 out:
3063         /*
3064          * Even though in theory the peer could have different
3065          * aggregation reorder buffer sizes for different sessions,
3066          * our ucode doesn't allow for that and has a global limit
3067          * for each station. Therefore, use the minimum of all the
3068          * aggregation sessions and our default value.
3069          */
3070         mvmsta->max_agg_bufsize =
3071                 min(mvmsta->max_agg_bufsize, buf_size);
3072         mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
3073
3074         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3075                      sta->addr, tid);
3076
3077         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false);
3078 }
3079
3080 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3081                                         struct iwl_mvm_sta *mvmsta,
3082                                         struct iwl_mvm_tid_data *tid_data)
3083 {
3084         u16 txq_id = tid_data->txq_id;
3085
3086         if (iwl_mvm_has_new_tx_api(mvm))
3087                 return;
3088
3089         spin_lock_bh(&mvm->queue_info_lock);
3090         /*
3091          * The TXQ is marked as reserved only if no traffic came through yet
3092          * This means no traffic has been sent on this TID (agg'd or not), so
3093          * we no longer have use for the queue. Since it hasn't even been
3094          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3095          * free.
3096          */
3097         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3098                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3099                 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3100         }
3101
3102         spin_unlock_bh(&mvm->queue_info_lock);
3103 }
3104
3105 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3106                             struct ieee80211_sta *sta, u16 tid)
3107 {
3108         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3109         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3110         u16 txq_id;
3111         int err;
3112
3113         /*
3114          * If mac80211 is cleaning its state, then say that we finished since
3115          * our state has been cleared anyway.
3116          */
3117         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3118                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3119                 return 0;
3120         }
3121
3122         spin_lock_bh(&mvmsta->lock);
3123
3124         txq_id = tid_data->txq_id;
3125
3126         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3127                             mvmsta->sta_id, tid, txq_id, tid_data->state);
3128
3129         mvmsta->agg_tids &= ~BIT(tid);
3130
3131         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3132
3133         switch (tid_data->state) {
3134         case IWL_AGG_ON:
3135                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3136
3137                 IWL_DEBUG_TX_QUEUES(mvm,
3138                                     "ssn = %d, next_recl = %d\n",
3139                                     tid_data->ssn, tid_data->next_reclaimed);
3140
3141                 tid_data->ssn = 0xffff;
3142                 tid_data->state = IWL_AGG_OFF;
3143                 spin_unlock_bh(&mvmsta->lock);
3144
3145                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3146
3147                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3148                 return 0;
3149         case IWL_AGG_STARTING:
3150         case IWL_EMPTYING_HW_QUEUE_ADDBA:
3151                 /*
3152                  * The agg session has been stopped before it was set up. This
3153                  * can happen when the AddBA timer times out for example.
3154                  */
3155
3156                 /* No barriers since we are under mutex */
3157                 lockdep_assert_held(&mvm->mutex);
3158
3159                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3160                 tid_data->state = IWL_AGG_OFF;
3161                 err = 0;
3162                 break;
3163         default:
3164                 IWL_ERR(mvm,
3165                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3166                         mvmsta->sta_id, tid, tid_data->state);
3167                 IWL_ERR(mvm,
3168                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3169                 err = -EINVAL;
3170         }
3171
3172         spin_unlock_bh(&mvmsta->lock);
3173
3174         return err;
3175 }
3176
3177 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3178                             struct ieee80211_sta *sta, u16 tid)
3179 {
3180         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3181         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3182         u16 txq_id;
3183         enum iwl_mvm_agg_state old_state;
3184
3185         /*
3186          * First set the agg state to OFF to avoid calling
3187          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3188          */
3189         spin_lock_bh(&mvmsta->lock);
3190         txq_id = tid_data->txq_id;
3191         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3192                             mvmsta->sta_id, tid, txq_id, tid_data->state);
3193         old_state = tid_data->state;
3194         tid_data->state = IWL_AGG_OFF;
3195         mvmsta->agg_tids &= ~BIT(tid);
3196         spin_unlock_bh(&mvmsta->lock);
3197
3198         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3199
3200         if (old_state >= IWL_AGG_ON) {
3201                 iwl_mvm_drain_sta(mvm, mvmsta, true);
3202
3203                 if (iwl_mvm_has_new_tx_api(mvm)) {
3204                         if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
3205                                                    BIT(tid), 0))
3206                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3207                         iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3208                 } else {
3209                         if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
3210                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3211                         iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3212                 }
3213
3214                 iwl_mvm_drain_sta(mvm, mvmsta, false);
3215
3216                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3217         }
3218
3219         return 0;
3220 }
3221
3222 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3223 {
3224         int i, max = -1, max_offs = -1;
3225
3226         lockdep_assert_held(&mvm->mutex);
3227
3228         /* Pick the unused key offset with the highest 'deleted'
3229          * counter. Every time a key is deleted, all the counters
3230          * are incremented and the one that was just deleted is
3231          * reset to zero. Thus, the highest counter is the one
3232          * that was deleted longest ago. Pick that one.
3233          */
3234         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3235                 if (test_bit(i, mvm->fw_key_table))
3236                         continue;
3237                 if (mvm->fw_key_deleted[i] > max) {
3238                         max = mvm->fw_key_deleted[i];
3239                         max_offs = i;
3240                 }
3241         }
3242
3243         if (max_offs < 0)
3244                 return STA_KEY_IDX_INVALID;
3245
3246         return max_offs;
3247 }
3248
3249 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3250                                                struct ieee80211_vif *vif,
3251                                                struct ieee80211_sta *sta)
3252 {
3253         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3254
3255         if (sta)
3256                 return iwl_mvm_sta_from_mac80211(sta);
3257
3258         /*
3259          * The device expects GTKs for station interfaces to be
3260          * installed as GTKs for the AP station. If we have no
3261          * station ID, then use AP's station ID.
3262          */
3263         if (vif->type == NL80211_IFTYPE_STATION &&
3264             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3265                 u8 sta_id = mvmvif->ap_sta_id;
3266
3267                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3268                                             lockdep_is_held(&mvm->mutex));
3269
3270                 /*
3271                  * It is possible that the 'sta' parameter is NULL,
3272                  * for example when a GTK is removed - the sta_id will then
3273                  * be the AP ID, and no station was passed by mac80211.
3274                  */
3275                 if (IS_ERR_OR_NULL(sta))
3276                         return NULL;
3277
3278                 return iwl_mvm_sta_from_mac80211(sta);
3279         }
3280
3281         return NULL;
3282 }
3283
3284 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3285                                 u32 sta_id,
3286                                 struct ieee80211_key_conf *key, bool mcast,
3287                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3288                                 u8 key_offset, bool mfp)
3289 {
3290         union {
3291                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3292                 struct iwl_mvm_add_sta_key_cmd cmd;
3293         } u = {};
3294         __le16 key_flags;
3295         int ret;
3296         u32 status;
3297         u16 keyidx;
3298         u64 pn = 0;
3299         int i, size;
3300         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3301                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3302
3303         if (sta_id == IWL_MVM_INVALID_STA)
3304                 return -EINVAL;
3305
3306         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3307                  STA_KEY_FLG_KEYID_MSK;
3308         key_flags = cpu_to_le16(keyidx);
3309         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3310
3311         switch (key->cipher) {
3312         case WLAN_CIPHER_SUITE_TKIP:
3313                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3314                 if (new_api) {
3315                         memcpy((void *)&u.cmd.tx_mic_key,
3316                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3317                                IWL_MIC_KEY_SIZE);
3318
3319                         memcpy((void *)&u.cmd.rx_mic_key,
3320                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3321                                IWL_MIC_KEY_SIZE);
3322                         pn = atomic64_read(&key->tx_pn);
3323
3324                 } else {
3325                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3326                         for (i = 0; i < 5; i++)
3327                                 u.cmd_v1.tkip_rx_ttak[i] =
3328                                         cpu_to_le16(tkip_p1k[i]);
3329                 }
3330                 memcpy(u.cmd.common.key, key->key, key->keylen);
3331                 break;
3332         case WLAN_CIPHER_SUITE_CCMP:
3333                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3334                 memcpy(u.cmd.common.key, key->key, key->keylen);
3335                 if (new_api)
3336                         pn = atomic64_read(&key->tx_pn);
3337                 break;
3338         case WLAN_CIPHER_SUITE_WEP104:
3339                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3340                 /* fall through */
3341         case WLAN_CIPHER_SUITE_WEP40:
3342                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3343                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3344                 break;
3345         case WLAN_CIPHER_SUITE_GCMP_256:
3346                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3347                 /* fall through */
3348         case WLAN_CIPHER_SUITE_GCMP:
3349                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3350                 memcpy(u.cmd.common.key, key->key, key->keylen);
3351                 if (new_api)
3352                         pn = atomic64_read(&key->tx_pn);
3353                 break;
3354         default:
3355                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3356                 memcpy(u.cmd.common.key, key->key, key->keylen);
3357         }
3358
3359         if (mcast)
3360                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3361         if (mfp)
3362                 key_flags |= cpu_to_le16(STA_KEY_MFP);
3363
3364         u.cmd.common.key_offset = key_offset;
3365         u.cmd.common.key_flags = key_flags;
3366         u.cmd.common.sta_id = sta_id;
3367
3368         if (new_api) {
3369                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3370                 size = sizeof(u.cmd);
3371         } else {
3372                 size = sizeof(u.cmd_v1);
3373         }
3374
3375         status = ADD_STA_SUCCESS;
3376         if (cmd_flags & CMD_ASYNC)
3377                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3378                                            &u.cmd);
3379         else
3380                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3381                                                   &u.cmd, &status);
3382
3383         switch (status) {
3384         case ADD_STA_SUCCESS:
3385                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3386                 break;
3387         default:
3388                 ret = -EIO;
3389                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3390                 break;
3391         }
3392
3393         return ret;
3394 }
3395
3396 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3397                                  struct ieee80211_key_conf *keyconf,
3398                                  u8 sta_id, bool remove_key)
3399 {
3400         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3401
3402         /* verify the key details match the required command's expectations */
3403         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3404                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3405                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3406                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3407                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3408                 return -EINVAL;
3409
3410         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3411                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3412                 return -EINVAL;
3413
3414         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3415         igtk_cmd.sta_id = cpu_to_le32(sta_id);
3416
3417         if (remove_key) {
3418                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3419         } else {
3420                 struct ieee80211_key_seq seq;
3421                 const u8 *pn;
3422
3423                 switch (keyconf->cipher) {
3424                 case WLAN_CIPHER_SUITE_AES_CMAC:
3425                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3426                         break;
3427                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3428                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3429                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3430                         break;
3431                 default:
3432                         return -EINVAL;
3433                 }
3434
3435                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3436                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3437                         igtk_cmd.ctrl_flags |=
3438                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3439                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3440                 pn = seq.aes_cmac.pn;
3441                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3442                                                        ((u64) pn[4] << 8) |
3443                                                        ((u64) pn[3] << 16) |
3444                                                        ((u64) pn[2] << 24) |
3445                                                        ((u64) pn[1] << 32) |
3446                                                        ((u64) pn[0] << 40));
3447         }
3448
3449         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3450                        remove_key ? "removing" : "installing",
3451                        igtk_cmd.sta_id);
3452
3453         if (!iwl_mvm_has_new_rx_api(mvm)) {
3454                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3455                         .ctrl_flags = igtk_cmd.ctrl_flags,
3456                         .key_id = igtk_cmd.key_id,
3457                         .sta_id = igtk_cmd.sta_id,
3458                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3459                 };
3460
3461                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3462                        ARRAY_SIZE(igtk_cmd_v1.igtk));
3463                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3464                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3465         }
3466         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3467                                     sizeof(igtk_cmd), &igtk_cmd);
3468 }
3469
3470
3471 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3472                                        struct ieee80211_vif *vif,
3473                                        struct ieee80211_sta *sta)
3474 {
3475         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3476
3477         if (sta)
3478                 return sta->addr;
3479
3480         if (vif->type == NL80211_IFTYPE_STATION &&
3481             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3482                 u8 sta_id = mvmvif->ap_sta_id;
3483                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3484                                                 lockdep_is_held(&mvm->mutex));
3485                 return sta->addr;
3486         }
3487
3488
3489         return NULL;
3490 }
3491
3492 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3493                                  struct ieee80211_vif *vif,
3494                                  struct ieee80211_sta *sta,
3495                                  struct ieee80211_key_conf *keyconf,
3496                                  u8 key_offset,
3497                                  bool mcast)
3498 {
3499         int ret;
3500         const u8 *addr;
3501         struct ieee80211_key_seq seq;
3502         u16 p1k[5];
3503         u32 sta_id;
3504         bool mfp = false;
3505
3506         if (sta) {
3507                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3508
3509                 sta_id = mvm_sta->sta_id;
3510                 mfp = sta->mfp;
3511         } else if (vif->type == NL80211_IFTYPE_AP &&
3512                    !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3513                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3514
3515                 sta_id = mvmvif->mcast_sta.sta_id;
3516         } else {
3517                 IWL_ERR(mvm, "Failed to find station id\n");
3518                 return -EINVAL;
3519         }
3520
3521         switch (keyconf->cipher) {
3522         case WLAN_CIPHER_SUITE_TKIP:
3523                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3524                 /* get phase 1 key from mac80211 */
3525                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3526                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3527                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3528                                            seq.tkip.iv32, p1k, 0, key_offset,
3529                                            mfp);
3530                 break;
3531         case WLAN_CIPHER_SUITE_CCMP:
3532         case WLAN_CIPHER_SUITE_WEP40:
3533         case WLAN_CIPHER_SUITE_WEP104:
3534         case WLAN_CIPHER_SUITE_GCMP:
3535         case WLAN_CIPHER_SUITE_GCMP_256:
3536                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3537                                            0, NULL, 0, key_offset, mfp);
3538                 break;
3539         default:
3540                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3541                                            0, NULL, 0, key_offset, mfp);
3542         }
3543
3544         return ret;
3545 }
3546
3547 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3548                                     struct ieee80211_key_conf *keyconf,
3549                                     bool mcast)
3550 {
3551         union {
3552                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3553                 struct iwl_mvm_add_sta_key_cmd cmd;
3554         } u = {};
3555         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3556                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3557         __le16 key_flags;
3558         int ret, size;
3559         u32 status;
3560
3561         /* This is a valid situation for GTK removal */
3562         if (sta_id == IWL_MVM_INVALID_STA)
3563                 return 0;
3564
3565         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3566                                  STA_KEY_FLG_KEYID_MSK);
3567         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3568         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3569
3570         if (mcast)
3571                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3572
3573         /*
3574          * The fields assigned here are in the same location at the start
3575          * of the command, so we can do this union trick.
3576          */
3577         u.cmd.common.key_flags = key_flags;
3578         u.cmd.common.key_offset = keyconf->hw_key_idx;
3579         u.cmd.common.sta_id = sta_id;
3580
3581         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3582
3583         status = ADD_STA_SUCCESS;
3584         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3585                                           &status);
3586
3587         switch (status) {
3588         case ADD_STA_SUCCESS:
3589                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3590                 break;
3591         default:
3592                 ret = -EIO;
3593                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3594                 break;
3595         }
3596
3597         return ret;
3598 }
3599
3600 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3601                         struct ieee80211_vif *vif,
3602                         struct ieee80211_sta *sta,
3603                         struct ieee80211_key_conf *keyconf,
3604                         u8 key_offset)
3605 {
3606         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3607         struct iwl_mvm_sta *mvm_sta;
3608         u8 sta_id = IWL_MVM_INVALID_STA;
3609         int ret;
3610         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3611
3612         lockdep_assert_held(&mvm->mutex);
3613
3614         if (vif->type != NL80211_IFTYPE_AP ||
3615             keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3616                 /* Get the station id from the mvm local station table */
3617                 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3618                 if (!mvm_sta) {
3619                         IWL_ERR(mvm, "Failed to find station\n");
3620                         return -EINVAL;
3621                 }
3622                 sta_id = mvm_sta->sta_id;
3623
3624                 /*
3625                  * It is possible that the 'sta' parameter is NULL, and thus
3626                  * there is a need to retrieve the sta from the local station
3627                  * table.
3628                  */
3629                 if (!sta) {
3630                         sta = rcu_dereference_protected(
3631                                 mvm->fw_id_to_mac_id[sta_id],
3632                                 lockdep_is_held(&mvm->mutex));
3633                         if (IS_ERR_OR_NULL(sta)) {
3634                                 IWL_ERR(mvm, "Invalid station id\n");
3635                                 return -EINVAL;
3636                         }
3637                 }
3638
3639                 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3640                         return -EINVAL;
3641         } else {
3642                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3643
3644                 sta_id = mvmvif->mcast_sta.sta_id;
3645         }
3646
3647         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3648             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3649             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3650                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3651                 goto end;
3652         }
3653
3654         /* If the key_offset is not pre-assigned, we need to find a
3655          * new offset to use.  In normal cases, the offset is not
3656          * pre-assigned, but during HW_RESTART we want to reuse the
3657          * same indices, so we pass them when this function is called.
3658          *
3659          * In D3 entry, we need to hardcoded the indices (because the
3660          * firmware hardcodes the PTK offset to 0).  In this case, we
3661          * need to make sure we don't overwrite the hw_key_idx in the
3662          * keyconf structure, because otherwise we cannot configure
3663          * the original ones back when resuming.
3664          */
3665         if (key_offset == STA_KEY_IDX_INVALID) {
3666                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3667                 if (key_offset == STA_KEY_IDX_INVALID)
3668                         return -ENOSPC;
3669                 keyconf->hw_key_idx = key_offset;
3670         }
3671
3672         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3673         if (ret)
3674                 goto end;
3675
3676         /*
3677          * For WEP, the same key is used for multicast and unicast. Upload it
3678          * again, using the same key offset, and now pointing the other one
3679          * to the same key slot (offset).
3680          * If this fails, remove the original as well.
3681          */
3682         if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3683              keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3684             sta) {
3685                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3686                                             key_offset, !mcast);
3687                 if (ret) {
3688                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3689                         goto end;
3690                 }
3691         }
3692
3693         __set_bit(key_offset, mvm->fw_key_table);
3694
3695 end:
3696         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3697                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3698                       sta ? sta->addr : zero_addr, ret);
3699         return ret;
3700 }
3701
3702 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3703                            struct ieee80211_vif *vif,
3704                            struct ieee80211_sta *sta,
3705                            struct ieee80211_key_conf *keyconf)
3706 {
3707         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3708         struct iwl_mvm_sta *mvm_sta;
3709         u8 sta_id = IWL_MVM_INVALID_STA;
3710         int ret, i;
3711
3712         lockdep_assert_held(&mvm->mutex);
3713
3714         /* Get the station from the mvm local station table */
3715         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3716         if (mvm_sta)
3717                 sta_id = mvm_sta->sta_id;
3718         else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3719                 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3720
3721
3722         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3723                       keyconf->keyidx, sta_id);
3724
3725         if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3726                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3727                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3728                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3729
3730         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3731                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3732                         keyconf->hw_key_idx);
3733                 return -ENOENT;
3734         }
3735
3736         /* track which key was deleted last */
3737         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3738                 if (mvm->fw_key_deleted[i] < U8_MAX)
3739                         mvm->fw_key_deleted[i]++;
3740         }
3741         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3742
3743         if (sta && !mvm_sta) {
3744                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3745                 return 0;
3746         }
3747
3748         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3749         if (ret)
3750                 return ret;
3751
3752         /* delete WEP key twice to get rid of (now useless) offset */
3753         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3754             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3755                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3756
3757         return ret;
3758 }
3759
3760 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3761                              struct ieee80211_vif *vif,
3762                              struct ieee80211_key_conf *keyconf,
3763                              struct ieee80211_sta *sta, u32 iv32,
3764                              u16 *phase1key)
3765 {
3766         struct iwl_mvm_sta *mvm_sta;
3767         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3768         bool mfp = sta ? sta->mfp : false;
3769
3770         rcu_read_lock();
3771
3772         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3773         if (WARN_ON_ONCE(!mvm_sta))
3774                 goto unlock;
3775         iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3776                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3777                              mfp);
3778
3779  unlock:
3780         rcu_read_unlock();
3781 }
3782
3783 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3784                                 struct ieee80211_sta *sta)
3785 {
3786         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3787         struct iwl_mvm_add_sta_cmd cmd = {
3788                 .add_modify = STA_MODE_MODIFY,
3789                 .sta_id = mvmsta->sta_id,
3790                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3791                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3792         };
3793         int ret;
3794
3795         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3796                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3797         if (ret)
3798                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3799 }
3800
3801 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3802                                        struct ieee80211_sta *sta,
3803                                        enum ieee80211_frame_release_type reason,
3804                                        u16 cnt, u16 tids, bool more_data,
3805                                        bool single_sta_queue)
3806 {
3807         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3808         struct iwl_mvm_add_sta_cmd cmd = {
3809                 .add_modify = STA_MODE_MODIFY,
3810                 .sta_id = mvmsta->sta_id,
3811                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3812                 .sleep_tx_count = cpu_to_le16(cnt),
3813                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3814         };
3815         int tid, ret;
3816         unsigned long _tids = tids;
3817
3818         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3819          * Note that this field is reserved and unused by firmware not
3820          * supporting GO uAPSD, so it's safe to always do this.
3821          */
3822         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3823                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3824
3825         /* If we're releasing frames from aggregation or dqa queues then check
3826          * if all the queues that we're releasing frames from, combined, have:
3827          *  - more frames than the service period, in which case more_data
3828          *    needs to be set
3829          *  - fewer than 'cnt' frames, in which case we need to adjust the
3830          *    firmware command (but do that unconditionally)
3831          */
3832         if (single_sta_queue) {
3833                 int remaining = cnt;
3834                 int sleep_tx_count;
3835
3836                 spin_lock_bh(&mvmsta->lock);
3837                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3838                         struct iwl_mvm_tid_data *tid_data;
3839                         u16 n_queued;
3840
3841                         tid_data = &mvmsta->tid_data[tid];
3842
3843                         n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3844                         if (n_queued > remaining) {
3845                                 more_data = true;
3846                                 remaining = 0;
3847                                 break;
3848                         }
3849                         remaining -= n_queued;
3850                 }
3851                 sleep_tx_count = cnt - remaining;
3852                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3853                         mvmsta->sleep_tx_count = sleep_tx_count;
3854                 spin_unlock_bh(&mvmsta->lock);
3855
3856                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3857                 if (WARN_ON(cnt - remaining == 0)) {
3858                         ieee80211_sta_eosp(sta);
3859                         return;
3860                 }
3861         }
3862
3863         /* Note: this is ignored by firmware not supporting GO uAPSD */
3864         if (more_data)
3865                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3866
3867         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3868                 mvmsta->next_status_eosp = true;
3869                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3870         } else {
3871                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3872         }
3873
3874         /* block the Tx queues until the FW updated the sleep Tx count */
3875         iwl_trans_block_txq_ptrs(mvm->trans, true);
3876
3877         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3878                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3879                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3880         if (ret)
3881                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3882 }
3883
3884 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3885                            struct iwl_rx_cmd_buffer *rxb)
3886 {
3887         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3888         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3889         struct ieee80211_sta *sta;
3890         u32 sta_id = le32_to_cpu(notif->sta_id);
3891
3892         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3893                 return;
3894
3895         rcu_read_lock();
3896         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3897         if (!IS_ERR_OR_NULL(sta))
3898                 ieee80211_sta_eosp(sta);
3899         rcu_read_unlock();
3900 }
3901
3902 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3903                                    struct iwl_mvm_sta *mvmsta, bool disable)
3904 {
3905         struct iwl_mvm_add_sta_cmd cmd = {
3906                 .add_modify = STA_MODE_MODIFY,
3907                 .sta_id = mvmsta->sta_id,
3908                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3909                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3910                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3911         };
3912         int ret;
3913
3914         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3915                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3916         if (ret)
3917                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3918 }
3919
3920 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3921                                       struct ieee80211_sta *sta,
3922                                       bool disable)
3923 {
3924         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3925
3926         spin_lock_bh(&mvm_sta->lock);
3927
3928         if (mvm_sta->disable_tx == disable) {
3929                 spin_unlock_bh(&mvm_sta->lock);
3930                 return;
3931         }
3932
3933         mvm_sta->disable_tx = disable;
3934
3935         /* Tell mac80211 to start/stop queuing tx for this station */
3936         ieee80211_sta_block_awake(mvm->hw, sta, disable);
3937
3938         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3939
3940         spin_unlock_bh(&mvm_sta->lock);
3941 }
3942
3943 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3944                                               struct iwl_mvm_vif *mvmvif,
3945                                               struct iwl_mvm_int_sta *sta,
3946                                               bool disable)
3947 {
3948         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3949         struct iwl_mvm_add_sta_cmd cmd = {
3950                 .add_modify = STA_MODE_MODIFY,
3951                 .sta_id = sta->sta_id,
3952                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3953                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3954                 .mac_id_n_color = cpu_to_le32(id),
3955         };
3956         int ret;
3957
3958         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3959                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3960         if (ret)
3961                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3962 }
3963
3964 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3965                                        struct iwl_mvm_vif *mvmvif,
3966                                        bool disable)
3967 {
3968         struct ieee80211_sta *sta;
3969         struct iwl_mvm_sta *mvm_sta;
3970         int i;
3971
3972         lockdep_assert_held(&mvm->mutex);
3973
3974         /* Block/unblock all the stations of the given mvmvif */
3975         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3976                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3977                                                 lockdep_is_held(&mvm->mutex));
3978                 if (IS_ERR_OR_NULL(sta))
3979                         continue;
3980
3981                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3982                 if (mvm_sta->mac_id_n_color !=
3983                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3984                         continue;
3985
3986                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3987         }
3988
3989         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3990                 return;
3991
3992         /* Need to block/unblock also multicast station */
3993         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3994                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3995                                                   &mvmvif->mcast_sta, disable);
3996
3997         /*
3998          * Only unblock the broadcast station (FW blocks it for immediate
3999          * quiet, not the driver)
4000          */
4001         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
4002                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4003                                                   &mvmvif->bcast_sta, disable);
4004 }
4005
4006 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
4007 {
4008         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4009         struct iwl_mvm_sta *mvmsta;
4010
4011         rcu_read_lock();
4012
4013         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
4014
4015         if (!WARN_ON(!mvmsta))
4016                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
4017
4018         rcu_read_unlock();
4019 }
4020
4021 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
4022 {
4023         u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
4024
4025         /*
4026          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
4027          * to align the wrap around of ssn so we compare relevant values.
4028          */
4029         if (mvm->trans->cfg->gen2)
4030                 sn &= 0xff;
4031
4032         return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
4033 }