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

   1 /******************************************************************************
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  10  * Copyright(c) 2016 Intel Deutschland GmbH
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  35  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 Intel Deutschland GmbH
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  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67 #include <net/mac80211.h>
  68
  69 #include "mvm.h"
  70 #include "sta.h"
  71 #include "rs.h"
  72
  73 /*
  74  * New version of ADD_STA_sta command added new fields at the end of the
  75  * structure, so sending the size of the relevant API's structure is enough to
  76  * support both API versions.
  77  */
  78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
  79 {
  80         return iwl_mvm_has_new_rx_api(mvm) ?
  81                 sizeof(struct iwl_mvm_add_sta_cmd) :
  82                 sizeof(struct iwl_mvm_add_sta_cmd_v7);
  83 }
  84
  85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
  86                                     enum nl80211_iftype iftype)
  87 {
  88         int sta_id;
  89         u32 reserved_ids = 0;
  90
  91         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
  92         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
  93
  94         lockdep_assert_held(&mvm->mutex);
  95
  96         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
  97         if (iftype != NL80211_IFTYPE_STATION)
  98                 reserved_ids = BIT(0);
  99
 100         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
 101         for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
 102                 if (BIT(sta_id) & reserved_ids)
 103                         continue;
 104
 105                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 106                                                lockdep_is_held(&mvm->mutex)))
 107                         return sta_id;
 108         }
 109         return IWL_MVM_STATION_COUNT;
 110 }
 111
 112 /* send station add/update command to firmware */
 113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 114                            bool update, unsigned int flags)
 115 {
 116         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 117         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
 118                 .sta_id = mvm_sta->sta_id,
 119                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
 120                 .add_modify = update ? 1 : 0,
 121                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
 122                                                  STA_FLG_MIMO_EN_MSK),
 123                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 124         };
 125         int ret;
 126         u32 status;
 127         u32 agg_size = 0, mpdu_dens = 0;
 128
 129         if (!update || (flags & STA_MODIFY_QUEUES)) {
 130                 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
 131                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 132
 133                 if (flags & STA_MODIFY_QUEUES)
 134                         add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 135         }
 136
 137         switch (sta->bandwidth) {
 138         case IEEE80211_STA_RX_BW_160:
 139                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 140                 /* fall through */
 141         case IEEE80211_STA_RX_BW_80:
 142                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 143                 /* fall through */
 144         case IEEE80211_STA_RX_BW_40:
 145                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 146                 /* fall through */
 147         case IEEE80211_STA_RX_BW_20:
 148                 if (sta->ht_cap.ht_supported)
 149                         add_sta_cmd.station_flags |=
 150                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 151                 break;
 152         }
 153
 154         switch (sta->rx_nss) {
 155         case 1:
 156                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 157                 break;
 158         case 2:
 159                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 160                 break;
 161         case 3 ... 8:
 162                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 163                 break;
 164         }
 165
 166         switch (sta->smps_mode) {
 167         case IEEE80211_SMPS_AUTOMATIC:
 168         case IEEE80211_SMPS_NUM_MODES:
 169                 WARN_ON(1);
 170                 break;
 171         case IEEE80211_SMPS_STATIC:
 172                 /* override NSS */
 173                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 174                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 175                 break;
 176         case IEEE80211_SMPS_DYNAMIC:
 177                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 178                 break;
 179         case IEEE80211_SMPS_OFF:
 180                 /* nothing */
 181                 break;
 182         }
 183
 184         if (sta->ht_cap.ht_supported) {
 185                 add_sta_cmd.station_flags_msk |=
 186                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 187                                     STA_FLG_AGG_MPDU_DENS_MSK);
 188
 189                 mpdu_dens = sta->ht_cap.ampdu_density;
 190         }
 191
 192         if (sta->vht_cap.vht_supported) {
 193                 agg_size = sta->vht_cap.cap &
 194                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 195                 agg_size >>=
 196                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 197         } else if (sta->ht_cap.ht_supported) {
 198                 agg_size = sta->ht_cap.ampdu_factor;
 199         }
 200
 201         add_sta_cmd.station_flags |=
 202                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 203         add_sta_cmd.station_flags |=
 204                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 205
 206         status = ADD_STA_SUCCESS;
 207         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 208                                           iwl_mvm_add_sta_cmd_size(mvm),
 209                                           &add_sta_cmd, &status);
 210         if (ret)
 211                 return ret;
 212
 213         switch (status & IWL_ADD_STA_STATUS_MASK) {
 214         case ADD_STA_SUCCESS:
 215                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 216                 break;
 217         default:
 218                 ret = -EIO;
 219                 IWL_ERR(mvm, "ADD_STA failed\n");
 220                 break;
 221         }
 222
 223         return ret;
 224 }
 225
 226 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
 227 {
 228         struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
 229         struct iwl_mvm_baid_data *ba_data;
 230         struct ieee80211_sta *sta;
 231         struct iwl_mvm_sta *mvm_sta;
 232         unsigned long timeout;
 233
 234         rcu_read_lock();
 235
 236         ba_data = rcu_dereference(*rcu_ptr);
 237
 238         if (WARN_ON(!ba_data))
 239                 goto unlock;
 240
 241         if (!ba_data->timeout)
 242                 goto unlock;
 243
 244         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 245         if (time_is_after_jiffies(timeout)) {
 246                 mod_timer(&ba_data->session_timer, timeout);
 247                 goto unlock;
 248         }
 249
 250         /* Timer expired */
 251         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 252         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 253         ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
 254                                           sta->addr, ba_data->tid);
 255 unlock:
 256         rcu_read_unlock();
 257 }
 258
 259 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
 260                                  struct ieee80211_sta *sta)
 261 {
 262         unsigned long used_hw_queues;
 263         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 264         unsigned int wdg_timeout =
 265                 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
 266         u32 ac;
 267
 268         lockdep_assert_held(&mvm->mutex);
 269
 270         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
 271
 272         /* Find available queues, and allocate them to the ACs */
 273         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 274                 u8 queue = find_first_zero_bit(&used_hw_queues,
 275                                                mvm->first_agg_queue);
 276
 277                 if (queue >= mvm->first_agg_queue) {
 278                         IWL_ERR(mvm, "Failed to allocate STA queue\n");
 279                         return -EBUSY;
 280                 }
 281
 282                 __set_bit(queue, &used_hw_queues);
 283                 mvmsta->hw_queue[ac] = queue;
 284         }
 285
 286         /* Found a place for all queues - enable them */
 287         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 288                 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
 289                                       mvmsta->hw_queue[ac],
 290                                       iwl_mvm_ac_to_tx_fifo[ac], 0,
 291                                       wdg_timeout);
 292                 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
 293         }
 294
 295         return 0;
 296 }
 297
 298 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
 299                                     struct ieee80211_sta *sta)
 300 {
 301         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 302         unsigned long sta_msk;
 303         int i;
 304
 305         lockdep_assert_held(&mvm->mutex);
 306
 307         /* disable the TDLS STA-specific queues */
 308         sta_msk = mvmsta->tfd_queue_msk;
 309         for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
 310                 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
 311 }
 312
 313 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
 314                                    struct ieee80211_sta *sta, u8 ac, int tid,
 315                                    struct ieee80211_hdr *hdr)
 316 {
 317         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 318         struct iwl_trans_txq_scd_cfg cfg = {
 319                 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
 320                 .sta_id = mvmsta->sta_id,
 321                 .tid = tid,
 322                 .frame_limit = IWL_FRAME_LIMIT,
 323         };
 324         unsigned int wdg_timeout =
 325                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 326         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 327         int queue = -1;
 328         int ssn;
 329         int ret;
 330
 331         lockdep_assert_held(&mvm->mutex);
 332
 333         spin_lock_bh(&mvm->queue_info_lock);
 334
 335         /*
 336          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
 337          * exists
 338          */
 339         if (!ieee80211_is_data_qos(hdr->frame_control) ||
 340             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 341                 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_MGMT_QUEUE,
 342                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
 343                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
 344                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
 345                                             queue);
 346
 347                 /* If no such queue is found, we'll use a DATA queue instead */
 348         }
 349
 350         if (queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
 351                 queue = mvmsta->reserved_queue;
 352                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
 353         }
 354
 355         if (queue < 0)
 356                 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
 357                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 358
 359         /*
 360          * Mark TXQ as ready, even though it hasn't been fully configured yet,
 361          * to make sure no one else takes it.
 362          * This will allow avoiding re-acquiring the lock at the end of the
 363          * configuration. On error we'll mark it back as free.
 364          */
 365         if (queue >= 0)
 366                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 367
 368         spin_unlock_bh(&mvm->queue_info_lock);
 369
 370         /* TODO: support shared queues for same RA */
 371         if (queue < 0)
 372                 return -ENOSPC;
 373
 374         /*
 375          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
 376          * but for configuring the SCD to send A-MPDUs we need to mark the queue
 377          * as aggregatable.
 378          * Mark all DATA queues as allowing to be aggregated at some point
 379          */
 380         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 381                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
 382
 383         IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue #%d to sta %d on tid %d\n",
 384                             queue, mvmsta->sta_id, tid);
 385
 386         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 387         iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
 388                            wdg_timeout);
 389
 390         spin_lock_bh(&mvmsta->lock);
 391         mvmsta->tid_data[tid].txq_id = queue;
 392         mvmsta->tfd_queue_msk |= BIT(queue);
 393
 394         if (mvmsta->reserved_queue == queue)
 395                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
 396         spin_unlock_bh(&mvmsta->lock);
 397
 398         ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
 399         if (ret)
 400                 goto out_err;
 401
 402         return 0;
 403
 404 out_err:
 405         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
 406
 407         return ret;
 408 }
 409
 410 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
 411 {
 412         if (tid == IWL_MAX_TID_COUNT)
 413                 return IEEE80211_AC_VO; /* MGMT */
 414
 415         return tid_to_mac80211_ac[tid];
 416 }
 417
 418 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
 419                                        struct ieee80211_sta *sta, int tid)
 420 {
 421         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 422         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 423         struct sk_buff *skb;
 424         struct ieee80211_hdr *hdr;
 425         struct sk_buff_head deferred_tx;
 426         u8 mac_queue;
 427         bool no_queue = false; /* Marks if there is a problem with the queue */
 428         u8 ac;
 429
 430         lockdep_assert_held(&mvm->mutex);
 431
 432         skb = skb_peek(&tid_data->deferred_tx_frames);
 433         if (!skb)
 434                 return;
 435         hdr = (void *)skb->data;
 436
 437         ac = iwl_mvm_tid_to_ac_queue(tid);
 438         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
 439
 440         if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
 441             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
 442                 IWL_ERR(mvm,
 443                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
 444                         mvmsta->sta_id, tid);
 445
 446                 /*
 447                  * Mark queue as problematic so later the deferred traffic is
 448                  * freed, as we can do nothing with it
 449                  */
 450                 no_queue = true;
 451         }
 452
 453         __skb_queue_head_init(&deferred_tx);
 454
 455         /* Disable bottom-halves when entering TX path */
 456         local_bh_disable();
 457         spin_lock(&mvmsta->lock);
 458         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
 459         spin_unlock(&mvmsta->lock);
 460
 461         while ((skb = __skb_dequeue(&deferred_tx)))
 462                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
 463                         ieee80211_free_txskb(mvm->hw, skb);
 464         local_bh_enable();
 465
 466         /* Wake queue */
 467         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
 468 }
 469
 470 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
 471 {
 472         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
 473                                            add_stream_wk);
 474         struct ieee80211_sta *sta;
 475         struct iwl_mvm_sta *mvmsta;
 476         unsigned long deferred_tid_traffic;
 477         int sta_id, tid;
 478
 479         mutex_lock(&mvm->mutex);
 480
 481         /* Go over all stations with deferred traffic */
 482         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
 483                          IWL_MVM_STATION_COUNT) {
 484                 clear_bit(sta_id, mvm->sta_deferred_frames);
 485                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 486                                                 lockdep_is_held(&mvm->mutex));
 487                 if (IS_ERR_OR_NULL(sta))
 488                         continue;
 489
 490                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
 491                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
 492
 493                 for_each_set_bit(tid, &deferred_tid_traffic,
 494                                  IWL_MAX_TID_COUNT + 1)
 495                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
 496         }
 497
 498         mutex_unlock(&mvm->mutex);
 499 }
 500
 501 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
 502                                       struct ieee80211_sta *sta,
 503                                       enum nl80211_iftype vif_type)
 504 {
 505         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 506         int queue;
 507
 508         spin_lock_bh(&mvm->queue_info_lock);
 509
 510         /* Make sure we have free resources for this STA */
 511         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
 512             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
 513             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
 514              IWL_MVM_QUEUE_FREE))
 515                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
 516         else
 517                 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
 518                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 519         if (queue < 0) {
 520                 spin_unlock_bh(&mvm->queue_info_lock);
 521                 IWL_ERR(mvm, "No available queues for new station\n");
 522                 return -ENOSPC;
 523         }
 524         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
 525
 526         spin_unlock_bh(&mvm->queue_info_lock);
 527
 528         mvmsta->reserved_queue = queue;
 529
 530         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
 531                             queue, mvmsta->sta_id);
 532
 533         return 0;
 534 }
 535
 536 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
 537                     struct ieee80211_vif *vif,
 538                     struct ieee80211_sta *sta)
 539 {
 540         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 541         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 542         struct iwl_mvm_rxq_dup_data *dup_data;
 543         int i, ret, sta_id;
 544
 545         lockdep_assert_held(&mvm->mutex);
 546
 547         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 548                 sta_id = iwl_mvm_find_free_sta_id(mvm,
 549                                                   ieee80211_vif_type_p2p(vif));
 550         else
 551                 sta_id = mvm_sta->sta_id;
 552
 553         if (sta_id == IWL_MVM_STATION_COUNT)
 554                 return -ENOSPC;
 555
 556         spin_lock_init(&mvm_sta->lock);
 557
 558         mvm_sta->sta_id = sta_id;
 559         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
 560                                                       mvmvif->color);
 561         mvm_sta->vif = vif;
 562         mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 563         mvm_sta->tx_protection = 0;
 564         mvm_sta->tt_tx_protection = false;
 565
 566         /* HW restart, don't assume the memory has been zeroed */
 567         atomic_set(&mvm->pending_frames[sta_id], 0);
 568         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
 569         mvm_sta->tfd_queue_msk = 0;
 570
 571         /* allocate new queues for a TDLS station */
 572         if (sta->tdls) {
 573                 ret = iwl_mvm_tdls_sta_init(mvm, sta);
 574                 if (ret)
 575                         return ret;
 576         } else if (!iwl_mvm_is_dqa_supported(mvm)) {
 577                 for (i = 0; i < IEEE80211_NUM_ACS; i++)
 578                         if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
 579                                 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
 580         }
 581
 582         /* for HW restart - reset everything but the sequence number */
 583         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
 584                 u16 seq = mvm_sta->tid_data[i].seq_number;
 585                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
 586                 mvm_sta->tid_data[i].seq_number = seq;
 587
 588                 if (!iwl_mvm_is_dqa_supported(mvm))
 589                         continue;
 590
 591                 /*
 592                  * Mark all queues for this STA as unallocated and defer TX
 593                  * frames until the queue is allocated
 594                  */
 595                 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
 596                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
 597         }
 598         mvm_sta->deferred_traffic_tid_map = 0;
 599         mvm_sta->agg_tids = 0;
 600
 601         if (iwl_mvm_has_new_rx_api(mvm) &&
 602             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 603                 dup_data = kcalloc(mvm->trans->num_rx_queues,
 604                                    sizeof(*dup_data),
 605                                    GFP_KERNEL);
 606                 if (!dup_data)
 607                         return -ENOMEM;
 608                 mvm_sta->dup_data = dup_data;
 609         }
 610
 611         if (iwl_mvm_is_dqa_supported(mvm)) {
 612                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
 613                                                  ieee80211_vif_type_p2p(vif));
 614                 if (ret)
 615                         goto err;
 616         }
 617
 618         ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
 619         if (ret)
 620                 goto err;
 621
 622         if (vif->type == NL80211_IFTYPE_STATION) {
 623                 if (!sta->tdls) {
 624                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
 625                         mvmvif->ap_sta_id = sta_id;
 626                 } else {
 627                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
 628                 }
 629         }
 630
 631         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
 632
 633         return 0;
 634
 635 err:
 636         iwl_mvm_tdls_sta_deinit(mvm, sta);
 637         return ret;
 638 }
 639
 640 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
 641                        struct ieee80211_vif *vif,
 642                        struct ieee80211_sta *sta)
 643 {
 644         return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
 645 }
 646
 647 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 648                       bool drain)
 649 {
 650         struct iwl_mvm_add_sta_cmd cmd = {};
 651         int ret;
 652         u32 status;
 653
 654         lockdep_assert_held(&mvm->mutex);
 655
 656         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 657         cmd.sta_id = mvmsta->sta_id;
 658         cmd.add_modify = STA_MODE_MODIFY;
 659         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
 660         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
 661
 662         status = ADD_STA_SUCCESS;
 663         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 664                                           iwl_mvm_add_sta_cmd_size(mvm),
 665                                           &cmd, &status);
 666         if (ret)
 667                 return ret;
 668
 669         switch (status & IWL_ADD_STA_STATUS_MASK) {
 670         case ADD_STA_SUCCESS:
 671                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
 672                                mvmsta->sta_id);
 673                 break;
 674         default:
 675                 ret = -EIO;
 676                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
 677                         mvmsta->sta_id);
 678                 break;
 679         }
 680
 681         return ret;
 682 }
 683
 684 /*
 685  * Remove a station from the FW table. Before sending the command to remove
 686  * the station validate that the station is indeed known to the driver (sanity
 687  * only).
 688  */
 689 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
 690 {
 691         struct ieee80211_sta *sta;
 692         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
 693                 .sta_id = sta_id,
 694         };
 695         int ret;
 696
 697         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 698                                         lockdep_is_held(&mvm->mutex));
 699
 700         /* Note: internal stations are marked as error values */
 701         if (!sta) {
 702                 IWL_ERR(mvm, "Invalid station id\n");
 703                 return -EINVAL;
 704         }
 705
 706         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
 707                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
 708         if (ret) {
 709                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
 710                 return ret;
 711         }
 712
 713         return 0;
 714 }
 715
 716 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
 717 {
 718         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
 719         u8 sta_id;
 720
 721         /*
 722          * The mutex is needed because of the SYNC cmd, but not only: if the
 723          * work would run concurrently with iwl_mvm_rm_sta, it would run before
 724          * iwl_mvm_rm_sta sets the station as busy, and exit. Then
 725          * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
 726          * that later.
 727          */
 728         mutex_lock(&mvm->mutex);
 729
 730         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
 731                 int ret;
 732                 struct ieee80211_sta *sta =
 733                         rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 734                                                   lockdep_is_held(&mvm->mutex));
 735
 736                 /*
 737                  * This station is in use or RCU-removed; the latter happens in
 738                  * managed mode, where mac80211 removes the station before we
 739                  * can remove it from firmware (we can only do that after the
 740                  * MAC is marked unassociated), and possibly while the deauth
 741                  * frame to disconnect from the AP is still queued. Then, the
 742                  * station pointer is -ENOENT when the last skb is reclaimed.
 743                  */
 744                 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
 745                         continue;
 746
 747                 if (PTR_ERR(sta) == -EINVAL) {
 748                         IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
 749                                 sta_id);
 750                         continue;
 751                 }
 752
 753                 if (!sta) {
 754                         IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
 755                                 sta_id);
 756                         continue;
 757                 }
 758
 759                 WARN_ON(PTR_ERR(sta) != -EBUSY);
 760                 /* This station was removed and we waited until it got drained,
 761                  * we can now proceed and remove it.
 762                  */
 763                 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
 764                 if (ret) {
 765                         IWL_ERR(mvm,
 766                                 "Couldn't remove sta %d after it was drained\n",
 767                                 sta_id);
 768                         continue;
 769                 }
 770                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 771                 clear_bit(sta_id, mvm->sta_drained);
 772
 773                 if (mvm->tfd_drained[sta_id]) {
 774                         unsigned long i, msk = mvm->tfd_drained[sta_id];
 775
 776                         for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
 777                                 iwl_mvm_disable_txq(mvm, i, i,
 778                                                     IWL_MAX_TID_COUNT, 0);
 779
 780                         mvm->tfd_drained[sta_id] = 0;
 781                         IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
 782                                        sta_id, msk);
 783                 }
 784         }
 785
 786         mutex_unlock(&mvm->mutex);
 787 }
 788
 789 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
 790                                        struct ieee80211_vif *vif,
 791                                        struct iwl_mvm_sta *mvm_sta)
 792 {
 793         int ac;
 794         int i;
 795
 796         lockdep_assert_held(&mvm->mutex);
 797
 798         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
 799                 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
 800                         continue;
 801
 802                 ac = iwl_mvm_tid_to_ac_queue(i);
 803                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
 804                                     vif->hw_queue[ac], i, 0);
 805                 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
 806         }
 807 }
 808
 809 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
 810                    struct ieee80211_vif *vif,
 811                    struct ieee80211_sta *sta)
 812 {
 813         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 814         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 815         int ret;
 816
 817         lockdep_assert_held(&mvm->mutex);
 818
 819         if (iwl_mvm_has_new_rx_api(mvm))
 820                 kfree(mvm_sta->dup_data);
 821
 822         if (vif->type == NL80211_IFTYPE_STATION &&
 823             mvmvif->ap_sta_id == mvm_sta->sta_id) {
 824                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
 825                 if (ret)
 826                         return ret;
 827                 /* flush its queues here since we are freeing mvm_sta */
 828                 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
 829                 if (ret)
 830                         return ret;
 831                 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
 832                                                     mvm_sta->tfd_queue_msk);
 833                 if (ret)
 834                         return ret;
 835                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
 836
 837                 /* If DQA is supported - the queues can be disabled now */
 838                 if (iwl_mvm_is_dqa_supported(mvm))
 839                         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
 840
 841                 /* if we are associated - we can't remove the AP STA now */
 842                 if (vif->bss_conf.assoc)
 843                         return ret;
 844
 845                 /* unassoc - go ahead - remove the AP STA now */
 846                 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 847
 848                 /* clear d0i3_ap_sta_id if no longer relevant */
 849                 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
 850                         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 851         }
 852
 853         /*
 854          * This shouldn't happen - the TDLS channel switch should be canceled
 855          * before the STA is removed.
 856          */
 857         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
 858                 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
 859                 cancel_delayed_work(&mvm->tdls_cs.dwork);
 860         }
 861
 862         /*
 863          * Make sure that the tx response code sees the station as -EBUSY and
 864          * calls the drain worker.
 865          */
 866         spin_lock_bh(&mvm_sta->lock);
 867         /*
 868          * There are frames pending on the AC queues for this station.
 869          * We need to wait until all the frames are drained...
 870          */
 871         if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
 872                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
 873                                    ERR_PTR(-EBUSY));
 874                 spin_unlock_bh(&mvm_sta->lock);
 875
 876                 /* disable TDLS sta queues on drain complete */
 877                 if (sta->tdls) {
 878                         mvm->tfd_drained[mvm_sta->sta_id] =
 879                                                         mvm_sta->tfd_queue_msk;
 880                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
 881                                        mvm_sta->sta_id);
 882                 }
 883
 884                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
 885         } else {
 886                 spin_unlock_bh(&mvm_sta->lock);
 887
 888                 if (sta->tdls)
 889                         iwl_mvm_tdls_sta_deinit(mvm, sta);
 890
 891                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
 892                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
 893         }
 894
 895         return ret;
 896 }
 897
 898 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
 899                       struct ieee80211_vif *vif,
 900                       u8 sta_id)
 901 {
 902         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
 903
 904         lockdep_assert_held(&mvm->mutex);
 905
 906         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 907         return ret;
 908 }
 909
 910 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
 911                              struct iwl_mvm_int_sta *sta,
 912                              u32 qmask, enum nl80211_iftype iftype)
 913 {
 914         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 915                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
 916                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
 917                         return -ENOSPC;
 918         }
 919
 920         sta->tfd_queue_msk = qmask;
 921
 922         /* put a non-NULL value so iterating over the stations won't stop */
 923         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
 924         return 0;
 925 }
 926
 927 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
 928                                     struct iwl_mvm_int_sta *sta)
 929 {
 930         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
 931         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
 932         sta->sta_id = IWL_MVM_STATION_COUNT;
 933 }
 934
 935 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
 936                                       struct iwl_mvm_int_sta *sta,
 937                                       const u8 *addr,
 938                                       u16 mac_id, u16 color)
 939 {
 940         struct iwl_mvm_add_sta_cmd cmd;
 941         int ret;
 942         u32 status;
 943
 944         lockdep_assert_held(&mvm->mutex);
 945
 946         memset(&cmd, 0, sizeof(cmd));
 947         cmd.sta_id = sta->sta_id;
 948         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
 949                                                              color));
 950
 951         cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
 952         cmd.tid_disable_tx = cpu_to_le16(0xffff);
 953
 954         if (addr)
 955                 memcpy(cmd.addr, addr, ETH_ALEN);
 956
 957         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 958                                           iwl_mvm_add_sta_cmd_size(mvm),
 959                                           &cmd, &status);
 960         if (ret)
 961                 return ret;
 962
 963         switch (status & IWL_ADD_STA_STATUS_MASK) {
 964         case ADD_STA_SUCCESS:
 965                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
 966                 return 0;
 967         default:
 968                 ret = -EIO;
 969                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
 970                         status);
 971                 break;
 972         }
 973         return ret;
 974 }
 975
 976 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
 977 {
 978         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
 979                                         mvm->cfg->base_params->wd_timeout :
 980                                         IWL_WATCHDOG_DISABLED;
 981         int ret;
 982
 983         lockdep_assert_held(&mvm->mutex);
 984
 985         /* Map Aux queue to fifo - needs to happen before adding Aux station */
 986         iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
 987                               IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
 988
 989         /* Allocate aux station and assign to it the aux queue */
 990         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
 991                                        NL80211_IFTYPE_UNSPECIFIED);
 992         if (ret)
 993                 return ret;
 994
 995         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
 996                                          MAC_INDEX_AUX, 0);
 997
 998         if (ret)
 999                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1000         return ret;
1001 }
1002
1003 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1004 {
1005         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1006
1007         lockdep_assert_held(&mvm->mutex);
1008         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1009                                          mvmvif->id, 0);
1010 }
1011
1012 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1013 {
1014         int ret;
1015
1016         lockdep_assert_held(&mvm->mutex);
1017
1018         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1019         if (ret)
1020                 IWL_WARN(mvm, "Failed sending remove station\n");
1021
1022         return ret;
1023 }
1024
1025 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1026 {
1027         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1028 }
1029
1030 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1031 {
1032         lockdep_assert_held(&mvm->mutex);
1033
1034         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1035 }
1036
1037 /*
1038  * Send the add station command for the vif's broadcast station.
1039  * Assumes that the station was already allocated.
1040  *
1041  * @mvm: the mvm component
1042  * @vif: the interface to which the broadcast station is added
1043  * @bsta: the broadcast station to add.
1044  */
1045 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1046 {
1047         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1048         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1049         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1050         const u8 *baddr = _baddr;
1051
1052         lockdep_assert_held(&mvm->mutex);
1053
1054         if (iwl_mvm_is_dqa_supported(mvm)) {
1055                 struct iwl_trans_txq_scd_cfg cfg = {
1056                         .fifo = IWL_MVM_TX_FIFO_VO,
1057                         .sta_id = mvmvif->bcast_sta.sta_id,
1058                         .tid = IWL_MAX_TID_COUNT,
1059                         .aggregate = false,
1060                         .frame_limit = IWL_FRAME_LIMIT,
1061                 };
1062                 unsigned int wdg_timeout =
1063                         iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1064                 int queue;
1065
1066                 if ((vif->type == NL80211_IFTYPE_AP) &&
1067                     (mvmvif->bcast_sta.tfd_queue_msk &
1068                      BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1069                         queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1070                 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
1071                          (mvmvif->bcast_sta.tfd_queue_msk &
1072                           BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
1073                         queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1074                 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1075                         return -EINVAL;
1076
1077                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1078                                    wdg_timeout);
1079         }
1080
1081         if (vif->type == NL80211_IFTYPE_ADHOC)
1082                 baddr = vif->bss_conf.bssid;
1083
1084         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1085                 return -ENOSPC;
1086
1087         return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1088                                           mvmvif->id, mvmvif->color);
1089 }
1090
1091 /* Send the FW a request to remove the station from it's internal data
1092  * structures, but DO NOT remove the entry from the local data structures. */
1093 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1094 {
1095         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1096         int ret;
1097
1098         lockdep_assert_held(&mvm->mutex);
1099
1100         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1101         if (ret)
1102                 IWL_WARN(mvm, "Failed sending remove station\n");
1103         return ret;
1104 }
1105
1106 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1107 {
1108         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1109         u32 qmask = 0;
1110
1111         lockdep_assert_held(&mvm->mutex);
1112
1113         if (!iwl_mvm_is_dqa_supported(mvm))
1114                 qmask = iwl_mvm_mac_get_queues_mask(vif);
1115
1116         if (vif->type == NL80211_IFTYPE_AP) {
1117                 /*
1118                  * The firmware defines the TFD queue mask to only be relevant
1119                  * for *unicast* queues, so the multicast (CAB) queue shouldn't
1120                  * be included.
1121                  */
1122                 qmask &= ~BIT(vif->cab_queue);
1123
1124                 if (iwl_mvm_is_dqa_supported(mvm))
1125                         qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1126         } else if (iwl_mvm_is_dqa_supported(mvm) &&
1127                    vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1128                 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1129         }
1130
1131         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1132                                         ieee80211_vif_type_p2p(vif));
1133 }
1134
1135 /* Allocate a new station entry for the broadcast station to the given vif,
1136  * and send it to the FW.
1137  * Note that each P2P mac should have its own broadcast station.
1138  *
1139  * @mvm: the mvm component
1140  * @vif: the interface to which the broadcast station is added
1141  * @bsta: the broadcast station to add. */
1142 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1143 {
1144         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1145         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1146         int ret;
1147
1148         lockdep_assert_held(&mvm->mutex);
1149
1150         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1151         if (ret)
1152                 return ret;
1153
1154         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1155
1156         if (ret)
1157                 iwl_mvm_dealloc_int_sta(mvm, bsta);
1158
1159         return ret;
1160 }
1161
1162 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1163 {
1164         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1165
1166         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1167 }
1168
1169 /*
1170  * Send the FW a request to remove the station from it's internal data
1171  * structures, and in addition remove it from the local data structure.
1172  */
1173 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1174 {
1175         int ret;
1176
1177         lockdep_assert_held(&mvm->mutex);
1178
1179         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1180
1181         iwl_mvm_dealloc_bcast_sta(mvm, vif);
1182
1183         return ret;
1184 }
1185
1186 #define IWL_MAX_RX_BA_SESSIONS 16
1187
1188 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1189 {
1190         struct iwl_mvm_delba_notif notif = {
1191                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1192                 .metadata.sync = 1,
1193                 .delba.baid = baid,
1194         };
1195         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1196 };
1197
1198 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1199                                  struct iwl_mvm_baid_data *data)
1200 {
1201         int i;
1202
1203         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
1204
1205         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1206                 int j;
1207                 struct iwl_mvm_reorder_buffer *reorder_buf =
1208                         &data->reorder_buf[i];
1209
1210                 spin_lock_bh(&reorder_buf->lock);
1211                 if (likely(!reorder_buf->num_stored)) {
1212                         spin_unlock_bh(&reorder_buf->lock);
1213                         continue;
1214                 }
1215
1216                 /*
1217                  * This shouldn't happen in regular DELBA since the internal
1218                  * delBA notification should trigger a release of all frames in
1219                  * the reorder buffer.
1220                  */
1221                 WARN_ON(1);
1222
1223                 for (j = 0; j < reorder_buf->buf_size; j++)
1224                         __skb_queue_purge(&reorder_buf->entries[j]);
1225                 /*
1226                  * Prevent timer re-arm. This prevents a very far fetched case
1227                  * where we timed out on the notification. There may be prior
1228                  * RX frames pending in the RX queue before the notification
1229                  * that might get processed between now and the actual deletion
1230                  * and we would re-arm the timer although we are deleting the
1231                  * reorder buffer.
1232                  */
1233                 reorder_buf->removed = true;
1234                 spin_unlock_bh(&reorder_buf->lock);
1235                 del_timer_sync(&reorder_buf->reorder_timer);
1236         }
1237 }
1238
1239 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
1240                                         u32 sta_id,
1241                                         struct iwl_mvm_baid_data *data,
1242                                         u16 ssn, u8 buf_size)
1243 {
1244         int i;
1245
1246         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1247                 struct iwl_mvm_reorder_buffer *reorder_buf =
1248                         &data->reorder_buf[i];
1249                 int j;
1250
1251                 reorder_buf->num_stored = 0;
1252                 reorder_buf->head_sn = ssn;
1253                 reorder_buf->buf_size = buf_size;
1254                 /* rx reorder timer */
1255                 reorder_buf->reorder_timer.function =
1256                         iwl_mvm_reorder_timer_expired;
1257                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
1258                 init_timer(&reorder_buf->reorder_timer);
1259                 spin_lock_init(&reorder_buf->lock);
1260                 reorder_buf->mvm = mvm;
1261                 reorder_buf->queue = i;
1262                 reorder_buf->sta_id = sta_id;
1263                 for (j = 0; j < reorder_buf->buf_size; j++)
1264                         __skb_queue_head_init(&reorder_buf->entries[j]);
1265         }
1266 }
1267
1268 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1269                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
1270 {
1271         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1272         struct iwl_mvm_add_sta_cmd cmd = {};
1273         struct iwl_mvm_baid_data *baid_data = NULL;
1274         int ret;
1275         u32 status;
1276
1277         lockdep_assert_held(&mvm->mutex);
1278
1279         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1280                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1281                 return -ENOSPC;
1282         }
1283
1284         if (iwl_mvm_has_new_rx_api(mvm) && start) {
1285                 /*
1286                  * Allocate here so if allocation fails we can bail out early
1287                  * before starting the BA session in the firmware
1288                  */
1289                 baid_data = kzalloc(sizeof(*baid_data) +
1290                                     mvm->trans->num_rx_queues *
1291                                     sizeof(baid_data->reorder_buf[0]),
1292                                     GFP_KERNEL);
1293                 if (!baid_data)
1294                         return -ENOMEM;
1295         }
1296
1297         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1298         cmd.sta_id = mvm_sta->sta_id;
1299         cmd.add_modify = STA_MODE_MODIFY;
1300         if (start) {
1301                 cmd.add_immediate_ba_tid = (u8) tid;
1302                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1303                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1304         } else {
1305                 cmd.remove_immediate_ba_tid = (u8) tid;
1306         }
1307         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
1308                                   STA_MODIFY_REMOVE_BA_TID;
1309
1310         status = ADD_STA_SUCCESS;
1311         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1312                                           iwl_mvm_add_sta_cmd_size(mvm),
1313                                           &cmd, &status);
1314         if (ret)
1315                 goto out_free;
1316
1317         switch (status & IWL_ADD_STA_STATUS_MASK) {
1318         case ADD_STA_SUCCESS:
1319                 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
1320                                start ? "start" : "stopp");
1321                 break;
1322         case ADD_STA_IMMEDIATE_BA_FAILURE:
1323                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
1324                 ret = -ENOSPC;
1325                 break;
1326         default:
1327                 ret = -EIO;
1328                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
1329                         start ? "start" : "stopp", status);
1330                 break;
1331         }
1332
1333         if (ret)
1334                 goto out_free;
1335
1336         if (start) {
1337                 u8 baid;
1338
1339                 mvm->rx_ba_sessions++;
1340
1341                 if (!iwl_mvm_has_new_rx_api(mvm))
1342                         return 0;
1343
1344                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
1345                         ret = -EINVAL;
1346                         goto out_free;
1347                 }
1348                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
1349                             IWL_ADD_STA_BAID_SHIFT);
1350                 baid_data->baid = baid;
1351                 baid_data->timeout = timeout;
1352                 baid_data->last_rx = jiffies;
1353                 init_timer(&baid_data->session_timer);
1354                 baid_data->session_timer.function =
1355                         iwl_mvm_rx_agg_session_expired;
1356                 baid_data->session_timer.data =
1357                         (unsigned long)&mvm->baid_map[baid];
1358                 baid_data->mvm = mvm;
1359                 baid_data->tid = tid;
1360                 baid_data->sta_id = mvm_sta->sta_id;
1361
1362                 mvm_sta->tid_to_baid[tid] = baid;
1363                 if (timeout)
1364                         mod_timer(&baid_data->session_timer,
1365                                   TU_TO_EXP_TIME(timeout * 2));
1366
1367                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
1368                                             baid_data, ssn, buf_size);
1369                 /*
1370                  * protect the BA data with RCU to cover a case where our
1371                  * internal RX sync mechanism will timeout (not that it's
1372                  * supposed to happen) and we will free the session data while
1373                  * RX is being processed in parallel
1374                  */
1375                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
1376                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
1377         } else if (mvm->rx_ba_sessions > 0) {
1378                 u8 baid = mvm_sta->tid_to_baid[tid];
1379
1380                 /* check that restart flow didn't zero the counter */
1381                 mvm->rx_ba_sessions--;
1382                 if (!iwl_mvm_has_new_rx_api(mvm))
1383                         return 0;
1384
1385                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1386                         return -EINVAL;
1387
1388                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
1389                 if (WARN_ON(!baid_data))
1390                         return -EINVAL;
1391
1392                 /* synchronize all rx queues so we can safely delete */
1393                 iwl_mvm_free_reorder(mvm, baid_data);
1394                 del_timer_sync(&baid_data->session_timer);
1395                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
1396                 kfree_rcu(baid_data, rcu_head);
1397         }
1398         return 0;
1399
1400 out_free:
1401         kfree(baid_data);
1402         return ret;
1403 }
1404
1405 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1406                               int tid, u8 queue, bool start)
1407 {
1408         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1409         struct iwl_mvm_add_sta_cmd cmd = {};
1410         int ret;
1411         u32 status;
1412
1413         lockdep_assert_held(&mvm->mutex);
1414
1415         if (start) {
1416                 mvm_sta->tfd_queue_msk |= BIT(queue);
1417                 mvm_sta->tid_disable_agg &= ~BIT(tid);
1418         } else {
1419                 /* In DQA-mode the queue isn't removed on agg termination */
1420                 if (!iwl_mvm_is_dqa_supported(mvm))
1421                         mvm_sta->tfd_queue_msk &= ~BIT(queue);
1422                 mvm_sta->tid_disable_agg |= BIT(tid);
1423         }
1424
1425         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1426         cmd.sta_id = mvm_sta->sta_id;
1427         cmd.add_modify = STA_MODE_MODIFY;
1428         cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
1429         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
1430         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
1431
1432         status = ADD_STA_SUCCESS;
1433         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1434                                           iwl_mvm_add_sta_cmd_size(mvm),
1435                                           &cmd, &status);
1436         if (ret)
1437                 return ret;
1438
1439         switch (status & IWL_ADD_STA_STATUS_MASK) {
1440         case ADD_STA_SUCCESS:
1441                 break;
1442         default:
1443                 ret = -EIO;
1444                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
1445                         start ? "start" : "stopp", status);
1446                 break;
1447         }
1448
1449         return ret;
1450 }
1451
1452 const u8 tid_to_mac80211_ac[] = {
1453         IEEE80211_AC_BE,
1454         IEEE80211_AC_BK,
1455         IEEE80211_AC_BK,
1456         IEEE80211_AC_BE,
1457         IEEE80211_AC_VI,
1458         IEEE80211_AC_VI,
1459         IEEE80211_AC_VO,
1460         IEEE80211_AC_VO,
1461 };
1462
1463 static const u8 tid_to_ucode_ac[] = {
1464         AC_BE,
1465         AC_BK,
1466         AC_BK,
1467         AC_BE,
1468         AC_VI,
1469         AC_VI,
1470         AC_VO,
1471         AC_VO,
1472 };
1473
1474 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1475                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1476 {
1477         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1478         struct iwl_mvm_tid_data *tid_data;
1479         int txq_id;
1480         int ret;
1481
1482         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1483                 return -EINVAL;
1484
1485         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
1486                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
1487                         mvmsta->tid_data[tid].state);
1488                 return -ENXIO;
1489         }
1490
1491         lockdep_assert_held(&mvm->mutex);
1492
1493         spin_lock_bh(&mvmsta->lock);
1494
1495         /* possible race condition - we entered D0i3 while starting agg */
1496         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
1497                 spin_unlock_bh(&mvmsta->lock);
1498                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
1499                 return -EIO;
1500         }
1501
1502         spin_lock_bh(&mvm->queue_info_lock);
1503
1504         /*
1505          * Note the possible cases:
1506          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
1507          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
1508          *      one and mark it as reserved
1509          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
1510          *      non-DQA mode, since the TXQ hasn't yet been allocated
1511          */
1512         txq_id = mvmsta->tid_data[tid].txq_id;
1513         if (!iwl_mvm_is_dqa_supported(mvm) ||
1514             mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
1515                 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
1516                                                  mvm->last_agg_queue);
1517                 if (txq_id < 0) {
1518                         ret = txq_id;
1519                         spin_unlock_bh(&mvm->queue_info_lock);
1520                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
1521                         goto release_locks;
1522                 }
1523
1524                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
1525                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
1526         }
1527         spin_unlock_bh(&mvm->queue_info_lock);
1528
1529         IWL_DEBUG_TX_QUEUES(mvm,
1530                             "AGG for tid %d will be on queue #%d\n",
1531                             tid, txq_id);
1532
1533         tid_data = &mvmsta->tid_data[tid];
1534         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1535         tid_data->txq_id = txq_id;
1536         *ssn = tid_data->ssn;
1537
1538         IWL_DEBUG_TX_QUEUES(mvm,
1539                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1540                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1541                             tid_data->next_reclaimed);
1542
1543         if (tid_data->ssn == tid_data->next_reclaimed) {
1544                 tid_data->state = IWL_AGG_STARTING;
1545                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1546         } else {
1547                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
1548         }
1549
1550         ret = 0;
1551
1552 release_locks:
1553         spin_unlock_bh(&mvmsta->lock);
1554
1555         return ret;
1556 }
1557
1558 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1559                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
1560                             bool amsdu)
1561 {
1562         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1563         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1564         unsigned int wdg_timeout =
1565                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1566         int queue, ret;
1567         bool alloc_queue = true;
1568         u16 ssn;
1569
1570         struct iwl_trans_txq_scd_cfg cfg = {
1571                 .sta_id = mvmsta->sta_id,
1572                 .tid = tid,
1573                 .frame_limit = buf_size,
1574                 .aggregate = true,
1575         };
1576
1577         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1578                      != IWL_MAX_TID_COUNT);
1579
1580         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1581
1582         spin_lock_bh(&mvmsta->lock);
1583         ssn = tid_data->ssn;
1584         queue = tid_data->txq_id;
1585         tid_data->state = IWL_AGG_ON;
1586         mvmsta->agg_tids |= BIT(tid);
1587         tid_data->ssn = 0xffff;
1588         tid_data->amsdu_in_ampdu_allowed = amsdu;
1589         spin_unlock_bh(&mvmsta->lock);
1590
1591         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1592
1593         /* In DQA mode, the existing queue might need to be reconfigured */
1594         if (iwl_mvm_is_dqa_supported(mvm)) {
1595                 spin_lock_bh(&mvm->queue_info_lock);
1596                 /* Maybe there is no need to even alloc a queue... */
1597                 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
1598                         alloc_queue = false;
1599                 spin_unlock_bh(&mvm->queue_info_lock);
1600
1601                 /*
1602                  * Only reconfig the SCD for the queue if the window size has
1603                  * changed from current (become smaller)
1604                  */
1605                 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
1606                         /*
1607                          * If reconfiguring an existing queue, it first must be
1608                          * drained
1609                          */
1610                         ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1611                                                             BIT(queue));
1612                         if (ret) {
1613                                 IWL_ERR(mvm,
1614                                         "Error draining queue before reconfig\n");
1615                                 return ret;
1616                         }
1617
1618                         ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
1619                                                    mvmsta->sta_id, tid,
1620                                                    buf_size, ssn);
1621                         if (ret) {
1622                                 IWL_ERR(mvm,
1623                                         "Error reconfiguring TXQ #%d\n", queue);
1624                                 return ret;
1625                         }
1626                 }
1627         }
1628
1629         if (alloc_queue)
1630                 iwl_mvm_enable_txq(mvm, queue,
1631                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
1632                                    &cfg, wdg_timeout);
1633
1634         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1635         if (ret)
1636                 return -EIO;
1637
1638         /* No need to mark as reserved */
1639         spin_lock_bh(&mvm->queue_info_lock);
1640         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1641         spin_unlock_bh(&mvm->queue_info_lock);
1642
1643         /*
1644          * Even though in theory the peer could have different
1645          * aggregation reorder buffer sizes for different sessions,
1646          * our ucode doesn't allow for that and has a global limit
1647          * for each station. Therefore, use the minimum of all the
1648          * aggregation sessions and our default value.
1649          */
1650         mvmsta->max_agg_bufsize =
1651                 min(mvmsta->max_agg_bufsize, buf_size);
1652         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1653
1654         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1655                      sta->addr, tid);
1656
1657         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1658 }
1659
1660 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1661                             struct ieee80211_sta *sta, u16 tid)
1662 {
1663         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1664         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1665         u16 txq_id;
1666         int err;
1667
1668
1669         /*
1670          * If mac80211 is cleaning its state, then say that we finished since
1671          * our state has been cleared anyway.
1672          */
1673         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1674                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1675                 return 0;
1676         }
1677
1678         spin_lock_bh(&mvmsta->lock);
1679
1680         txq_id = tid_data->txq_id;
1681
1682         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1683                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1684
1685         mvmsta->agg_tids &= ~BIT(tid);
1686
1687         spin_lock_bh(&mvm->queue_info_lock);
1688         /*
1689          * The TXQ is marked as reserved only if no traffic came through yet
1690          * This means no traffic has been sent on this TID (agg'd or not), so
1691          * we no longer have use for the queue. Since it hasn't even been
1692          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1693          * free.
1694          */
1695         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1696                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
1697         spin_unlock_bh(&mvm->queue_info_lock);
1698
1699         switch (tid_data->state) {
1700         case IWL_AGG_ON:
1701                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1702
1703                 IWL_DEBUG_TX_QUEUES(mvm,
1704                                     "ssn = %d, next_recl = %d\n",
1705                                     tid_data->ssn, tid_data->next_reclaimed);
1706
1707                 /* There are still packets for this RA / TID in the HW */
1708                 if (tid_data->ssn != tid_data->next_reclaimed) {
1709                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1710                         err = 0;
1711                         break;
1712                 }
1713
1714                 tid_data->ssn = 0xffff;
1715                 tid_data->state = IWL_AGG_OFF;
1716                 spin_unlock_bh(&mvmsta->lock);
1717
1718                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1719
1720                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1721
1722                 if (!iwl_mvm_is_dqa_supported(mvm)) {
1723                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1724
1725                         iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
1726                 }
1727                 return 0;
1728         case IWL_AGG_STARTING:
1729         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1730                 /*
1731                  * The agg session has been stopped before it was set up. This
1732                  * can happen when the AddBA timer times out for example.
1733                  */
1734
1735                 /* No barriers since we are under mutex */
1736                 lockdep_assert_held(&mvm->mutex);
1737
1738                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1739                 tid_data->state = IWL_AGG_OFF;
1740                 err = 0;
1741                 break;
1742         default:
1743                 IWL_ERR(mvm,
1744                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1745                         mvmsta->sta_id, tid, tid_data->state);
1746                 IWL_ERR(mvm,
1747                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1748                 err = -EINVAL;
1749         }
1750
1751         spin_unlock_bh(&mvmsta->lock);
1752
1753         return err;
1754 }
1755
1756 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1757                             struct ieee80211_sta *sta, u16 tid)
1758 {
1759         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1760         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1761         u16 txq_id;
1762         enum iwl_mvm_agg_state old_state;
1763
1764         /*
1765          * First set the agg state to OFF to avoid calling
1766          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1767          */
1768         spin_lock_bh(&mvmsta->lock);
1769         txq_id = tid_data->txq_id;
1770         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1771                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1772         old_state = tid_data->state;
1773         tid_data->state = IWL_AGG_OFF;
1774         mvmsta->agg_tids &= ~BIT(tid);
1775         spin_unlock_bh(&mvmsta->lock);
1776
1777         spin_lock_bh(&mvm->queue_info_lock);
1778         /*
1779          * The TXQ is marked as reserved only if no traffic came through yet
1780          * This means no traffic has been sent on this TID (agg'd or not), so
1781          * we no longer have use for the queue. Since it hasn't even been
1782          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1783          * free.
1784          */
1785         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1786                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
1787         spin_unlock_bh(&mvm->queue_info_lock);
1788
1789         if (old_state >= IWL_AGG_ON) {
1790                 iwl_mvm_drain_sta(mvm, mvmsta, true);
1791                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1792                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1793                 iwl_trans_wait_tx_queue_empty(mvm->trans,
1794                                               mvmsta->tfd_queue_msk);
1795                 iwl_mvm_drain_sta(mvm, mvmsta, false);
1796
1797                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1798
1799                 if (!iwl_mvm_is_dqa_supported(mvm)) {
1800                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1801
1802                         iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
1803                                             tid, 0);
1804                 }
1805         }
1806
1807         return 0;
1808 }
1809
1810 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1811 {
1812         int i, max = -1, max_offs = -1;
1813
1814         lockdep_assert_held(&mvm->mutex);
1815
1816         /* Pick the unused key offset with the highest 'deleted'
1817          * counter. Every time a key is deleted, all the counters
1818          * are incremented and the one that was just deleted is
1819          * reset to zero. Thus, the highest counter is the one
1820          * that was deleted longest ago. Pick that one.
1821          */
1822         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1823                 if (test_bit(i, mvm->fw_key_table))
1824                         continue;
1825                 if (mvm->fw_key_deleted[i] > max) {
1826                         max = mvm->fw_key_deleted[i];
1827                         max_offs = i;
1828                 }
1829         }
1830
1831         if (max_offs < 0)
1832                 return STA_KEY_IDX_INVALID;
1833
1834         return max_offs;
1835 }
1836
1837 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
1838                                                struct ieee80211_vif *vif,
1839                                                struct ieee80211_sta *sta)
1840 {
1841         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1842
1843         if (sta)
1844                 return iwl_mvm_sta_from_mac80211(sta);
1845
1846         /*
1847          * The device expects GTKs for station interfaces to be
1848          * installed as GTKs for the AP station. If we have no
1849          * station ID, then use AP's station ID.
1850          */
1851         if (vif->type == NL80211_IFTYPE_STATION &&
1852             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1853                 u8 sta_id = mvmvif->ap_sta_id;
1854
1855                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
1856                                             lockdep_is_held(&mvm->mutex));
1857
1858                 /*
1859                  * It is possible that the 'sta' parameter is NULL,
1860                  * for example when a GTK is removed - the sta_id will then
1861                  * be the AP ID, and no station was passed by mac80211.
1862                  */
1863                 if (IS_ERR_OR_NULL(sta))
1864                         return NULL;
1865
1866                 return iwl_mvm_sta_from_mac80211(sta);
1867         }
1868
1869         return NULL;
1870 }
1871
1872 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1873                                 struct iwl_mvm_sta *mvm_sta,
1874                                 struct ieee80211_key_conf *keyconf, bool mcast,
1875                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1876                                 u8 key_offset)
1877 {
1878         struct iwl_mvm_add_sta_key_cmd cmd = {};
1879         __le16 key_flags;
1880         int ret;
1881         u32 status;
1882         u16 keyidx;
1883         int i;
1884         u8 sta_id = mvm_sta->sta_id;
1885
1886         keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1887                  STA_KEY_FLG_KEYID_MSK;
1888         key_flags = cpu_to_le16(keyidx);
1889         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1890
1891         switch (keyconf->cipher) {
1892         case WLAN_CIPHER_SUITE_TKIP:
1893                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1894                 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1895                 for (i = 0; i < 5; i++)
1896                         cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1897                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1898                 break;
1899         case WLAN_CIPHER_SUITE_CCMP:
1900                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1901                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1902                 break;
1903         case WLAN_CIPHER_SUITE_WEP104:
1904                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1905                 /* fall through */
1906         case WLAN_CIPHER_SUITE_WEP40:
1907                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1908                 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1909                 break;
1910         default:
1911                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1912                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1913         }
1914
1915         if (mcast)
1916                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1917
1918         cmd.key_offset = key_offset;
1919         cmd.key_flags = key_flags;
1920         cmd.sta_id = sta_id;
1921
1922         status = ADD_STA_SUCCESS;
1923         if (cmd_flags & CMD_ASYNC)
1924                 ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1925                                             sizeof(cmd), &cmd);
1926         else
1927                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1928                                                   &cmd, &status);
1929
1930         switch (status) {
1931         case ADD_STA_SUCCESS:
1932                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1933                 break;
1934         default:
1935                 ret = -EIO;
1936                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1937                 break;
1938         }
1939
1940         return ret;
1941 }
1942
1943 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1944                                  struct ieee80211_key_conf *keyconf,
1945                                  u8 sta_id, bool remove_key)
1946 {
1947         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1948
1949         /* verify the key details match the required command's expectations */
1950         if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1951                     (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1952                     (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1953                 return -EINVAL;
1954
1955         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1956         igtk_cmd.sta_id = cpu_to_le32(sta_id);
1957
1958         if (remove_key) {
1959                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1960         } else {
1961                 struct ieee80211_key_seq seq;
1962                 const u8 *pn;
1963
1964                 switch (keyconf->cipher) {
1965                 case WLAN_CIPHER_SUITE_AES_CMAC:
1966                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
1967                         break;
1968                 default:
1969                         return -EINVAL;
1970                 }
1971
1972                 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1973                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1974                 pn = seq.aes_cmac.pn;
1975                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1976                                                        ((u64) pn[4] << 8) |
1977                                                        ((u64) pn[3] << 16) |
1978                                                        ((u64) pn[2] << 24) |
1979                                                        ((u64) pn[1] << 32) |
1980                                                        ((u64) pn[0] << 40));
1981         }
1982
1983         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1984                        remove_key ? "removing" : "installing",
1985                        igtk_cmd.sta_id);
1986
1987         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1988                                     sizeof(igtk_cmd), &igtk_cmd);
1989 }
1990
1991
1992 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1993                                        struct ieee80211_vif *vif,
1994                                        struct ieee80211_sta *sta)
1995 {
1996         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1997
1998         if (sta)
1999                 return sta->addr;
2000
2001         if (vif->type == NL80211_IFTYPE_STATION &&
2002             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2003                 u8 sta_id = mvmvif->ap_sta_id;
2004                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2005                                                 lockdep_is_held(&mvm->mutex));
2006                 return sta->addr;
2007         }
2008
2009
2010         return NULL;
2011 }
2012
2013 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2014                                  struct ieee80211_vif *vif,
2015                                  struct ieee80211_sta *sta,
2016                                  struct ieee80211_key_conf *keyconf,
2017                                  u8 key_offset,
2018                                  bool mcast)
2019 {
2020         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2021         int ret;
2022         const u8 *addr;
2023         struct ieee80211_key_seq seq;
2024         u16 p1k[5];
2025
2026         switch (keyconf->cipher) {
2027         case WLAN_CIPHER_SUITE_TKIP:
2028                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2029                 /* get phase 1 key from mac80211 */
2030                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2031                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2032                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2033                                            seq.tkip.iv32, p1k, 0, key_offset);
2034                 break;
2035         case WLAN_CIPHER_SUITE_CCMP:
2036         case WLAN_CIPHER_SUITE_WEP40:
2037         case WLAN_CIPHER_SUITE_WEP104:
2038                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2039                                            0, NULL, 0, key_offset);
2040                 break;
2041         default:
2042                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2043                                            0, NULL, 0, key_offset);
2044         }
2045
2046         return ret;
2047 }
2048
2049 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2050                                     struct ieee80211_key_conf *keyconf,
2051                                     bool mcast)
2052 {
2053         struct iwl_mvm_add_sta_key_cmd cmd = {};
2054         __le16 key_flags;
2055         int ret;
2056         u32 status;
2057
2058         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2059                                  STA_KEY_FLG_KEYID_MSK);
2060         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2061         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2062
2063         if (mcast)
2064                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2065
2066         cmd.key_flags = key_flags;
2067         cmd.key_offset = keyconf->hw_key_idx;
2068         cmd.sta_id = sta_id;
2069
2070         status = ADD_STA_SUCCESS;
2071         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2072                                           &cmd, &status);
2073
2074         switch (status) {
2075         case ADD_STA_SUCCESS:
2076                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2077                 break;
2078         default:
2079                 ret = -EIO;
2080                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2081                 break;
2082         }
2083
2084         return ret;
2085 }
2086
2087 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2088                         struct ieee80211_vif *vif,
2089                         struct ieee80211_sta *sta,
2090                         struct ieee80211_key_conf *keyconf,
2091                         u8 key_offset)
2092 {
2093         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2094         struct iwl_mvm_sta *mvm_sta;
2095         u8 sta_id;
2096         int ret;
2097         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
2098
2099         lockdep_assert_held(&mvm->mutex);
2100
2101         /* Get the station id from the mvm local station table */
2102         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2103         if (!mvm_sta) {
2104                 IWL_ERR(mvm, "Failed to find station\n");
2105                 return -EINVAL;
2106         }
2107         sta_id = mvm_sta->sta_id;
2108
2109         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
2110                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2111                 goto end;
2112         }
2113
2114         /*
2115          * It is possible that the 'sta' parameter is NULL, and thus
2116          * there is a need to retrieve  the sta from the local station table.
2117          */
2118         if (!sta) {
2119                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2120                                                 lockdep_is_held(&mvm->mutex));
2121                 if (IS_ERR_OR_NULL(sta)) {
2122                         IWL_ERR(mvm, "Invalid station id\n");
2123                         return -EINVAL;
2124                 }
2125         }
2126
2127         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2128                 return -EINVAL;
2129
2130         /* If the key_offset is not pre-assigned, we need to find a
2131          * new offset to use.  In normal cases, the offset is not
2132          * pre-assigned, but during HW_RESTART we want to reuse the
2133          * same indices, so we pass them when this function is called.
2134          *
2135          * In D3 entry, we need to hardcoded the indices (because the
2136          * firmware hardcodes the PTK offset to 0).  In this case, we
2137          * need to make sure we don't overwrite the hw_key_idx in the
2138          * keyconf structure, because otherwise we cannot configure
2139          * the original ones back when resuming.
2140          */
2141         if (key_offset == STA_KEY_IDX_INVALID) {
2142                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
2143                 if (key_offset == STA_KEY_IDX_INVALID)
2144                         return -ENOSPC;
2145                 keyconf->hw_key_idx = key_offset;
2146         }
2147
2148         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2149         if (ret)
2150                 goto end;
2151
2152         /*
2153          * For WEP, the same key is used for multicast and unicast. Upload it
2154          * again, using the same key offset, and now pointing the other one
2155          * to the same key slot (offset).
2156          * If this fails, remove the original as well.
2157          */
2158         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2159             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2160                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
2161                                             key_offset, !mcast);
2162                 if (ret) {
2163                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2164                         goto end;
2165                 }
2166         }
2167
2168         __set_bit(key_offset, mvm->fw_key_table);
2169
2170 end:
2171         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
2172                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2173                       sta ? sta->addr : zero_addr, ret);
2174         return ret;
2175 }
2176
2177 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
2178                            struct ieee80211_vif *vif,
2179                            struct ieee80211_sta *sta,
2180                            struct ieee80211_key_conf *keyconf)
2181 {
2182         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2183         struct iwl_mvm_sta *mvm_sta;
2184         u8 sta_id = IWL_MVM_STATION_COUNT;
2185         int ret, i;
2186
2187         lockdep_assert_held(&mvm->mutex);
2188
2189         /* Get the station from the mvm local station table */
2190         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2191
2192         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
2193                       keyconf->keyidx, sta_id);
2194
2195         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2196                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
2197
2198         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
2199                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
2200                         keyconf->hw_key_idx);
2201                 return -ENOENT;
2202         }
2203
2204         /* track which key was deleted last */
2205         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2206                 if (mvm->fw_key_deleted[i] < U8_MAX)
2207                         mvm->fw_key_deleted[i]++;
2208         }
2209         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
2210
2211         if (!mvm_sta) {
2212                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
2213                 return 0;
2214         }
2215
2216         sta_id = mvm_sta->sta_id;
2217
2218         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2219         if (ret)
2220                 return ret;
2221
2222         /* delete WEP key twice to get rid of (now useless) offset */
2223         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2224             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
2225                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
2226
2227         return ret;
2228 }
2229
2230 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
2231                              struct ieee80211_vif *vif,
2232                              struct ieee80211_key_conf *keyconf,
2233                              struct ieee80211_sta *sta, u32 iv32,
2234                              u16 *phase1key)
2235 {
2236         struct iwl_mvm_sta *mvm_sta;
2237         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2238
2239         rcu_read_lock();
2240
2241         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2242         if (WARN_ON_ONCE(!mvm_sta))
2243                 goto unlock;
2244         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2245                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2246
2247  unlock:
2248         rcu_read_unlock();
2249 }
2250
2251 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
2252                                 struct ieee80211_sta *sta)
2253 {
2254         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2255         struct iwl_mvm_add_sta_cmd cmd = {
2256                 .add_modify = STA_MODE_MODIFY,
2257                 .sta_id = mvmsta->sta_id,
2258                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
2259                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2260         };
2261         int ret;
2262
2263         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2264                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2265         if (ret)
2266                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2267 }
2268
2269 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
2270                                        struct ieee80211_sta *sta,
2271                                        enum ieee80211_frame_release_type reason,
2272                                        u16 cnt, u16 tids, bool more_data,
2273                                        bool agg)
2274 {
2275         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2276         struct iwl_mvm_add_sta_cmd cmd = {
2277                 .add_modify = STA_MODE_MODIFY,
2278                 .sta_id = mvmsta->sta_id,
2279                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
2280                 .sleep_tx_count = cpu_to_le16(cnt),
2281                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2282         };
2283         int tid, ret;
2284         unsigned long _tids = tids;
2285
2286         /* convert TIDs to ACs - we don't support TSPEC so that's OK
2287          * Note that this field is reserved and unused by firmware not
2288          * supporting GO uAPSD, so it's safe to always do this.
2289          */
2290         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
2291                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
2292
2293         /* If we're releasing frames from aggregation queues then check if the
2294          * all queues combined that we're releasing frames from have
2295          *  - more frames than the service period, in which case more_data
2296          *    needs to be set
2297          *  - fewer than 'cnt' frames, in which case we need to adjust the
2298          *    firmware command (but do that unconditionally)
2299          */
2300         if (agg) {
2301                 int remaining = cnt;
2302                 int sleep_tx_count;
2303
2304                 spin_lock_bh(&mvmsta->lock);
2305                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
2306                         struct iwl_mvm_tid_data *tid_data;
2307                         u16 n_queued;
2308
2309                         tid_data = &mvmsta->tid_data[tid];
2310                         if (WARN(tid_data->state != IWL_AGG_ON &&
2311                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
2312                                  "TID %d state is %d\n",
2313                                  tid, tid_data->state)) {
2314                                 spin_unlock_bh(&mvmsta->lock);
2315                                 ieee80211_sta_eosp(sta);
2316                                 return;
2317                         }
2318
2319                         n_queued = iwl_mvm_tid_queued(tid_data);
2320                         if (n_queued > remaining) {
2321                                 more_data = true;
2322                                 remaining = 0;
2323                                 break;
2324                         }
2325                         remaining -= n_queued;
2326                 }
2327                 sleep_tx_count = cnt - remaining;
2328                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
2329                         mvmsta->sleep_tx_count = sleep_tx_count;
2330                 spin_unlock_bh(&mvmsta->lock);
2331
2332                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2333                 if (WARN_ON(cnt - remaining == 0)) {
2334                         ieee80211_sta_eosp(sta);
2335                         return;
2336                 }
2337         }
2338
2339         /* Note: this is ignored by firmware not supporting GO uAPSD */
2340         if (more_data)
2341                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
2342
2343         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
2344                 mvmsta->next_status_eosp = true;
2345                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
2346         } else {
2347                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
2348         }
2349
2350         /* block the Tx queues until the FW updated the sleep Tx count */
2351         iwl_trans_block_txq_ptrs(mvm->trans, true);
2352
2353         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
2354                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
2355                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2356         if (ret)
2357                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2358 }
2359
2360 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
2361                            struct iwl_rx_cmd_buffer *rxb)
2362 {
2363         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2364         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
2365         struct ieee80211_sta *sta;
2366         u32 sta_id = le32_to_cpu(notif->sta_id);
2367
2368         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
2369                 return;
2370
2371         rcu_read_lock();
2372         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2373         if (!IS_ERR_OR_NULL(sta))
2374                 ieee80211_sta_eosp(sta);
2375         rcu_read_unlock();
2376 }
2377
2378 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
2379                                    struct iwl_mvm_sta *mvmsta, bool disable)
2380 {
2381         struct iwl_mvm_add_sta_cmd cmd = {
2382                 .add_modify = STA_MODE_MODIFY,
2383                 .sta_id = mvmsta->sta_id,
2384                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
2385                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
2386                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2387         };
2388         int ret;
2389
2390         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2391                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2392         if (ret)
2393                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2394 }
2395
2396 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
2397                                       struct ieee80211_sta *sta,
2398                                       bool disable)
2399 {
2400         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2401
2402         spin_lock_bh(&mvm_sta->lock);
2403
2404         if (mvm_sta->disable_tx == disable) {
2405                 spin_unlock_bh(&mvm_sta->lock);
2406                 return;
2407         }
2408
2409         mvm_sta->disable_tx = disable;
2410
2411         /*
2412          * Tell mac80211 to start/stop queuing tx for this station,
2413          * but don't stop queuing if there are still pending frames
2414          * for this station.
2415          */
2416         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
2417                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
2418
2419         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
2420
2421         spin_unlock_bh(&mvm_sta->lock);
2422 }
2423
2424 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
2425                                        struct iwl_mvm_vif *mvmvif,
2426                                        bool disable)
2427 {
2428         struct ieee80211_sta *sta;
2429         struct iwl_mvm_sta *mvm_sta;
2430         int i;
2431
2432         lockdep_assert_held(&mvm->mutex);
2433
2434         /* Block/unblock all the stations of the given mvmvif */
2435         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
2436                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
2437                                                 lockdep_is_held(&mvm->mutex));
2438                 if (IS_ERR_OR_NULL(sta))
2439                         continue;
2440
2441                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2442                 if (mvm_sta->mac_id_n_color !=
2443                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
2444                         continue;
2445
2446                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
2447         }
2448 }
2449
2450 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2451 {
2452         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2453         struct iwl_mvm_sta *mvmsta;
2454
2455         rcu_read_lock();
2456
2457         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
2458
2459         if (!WARN_ON(!mvmsta))
2460                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2461
2462         rcu_read_unlock();
2463 }