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             iwl_mvm_is_dqa_supported(mvm)){
 825                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
 826                 if (ret)
 827                         return ret;
 828                 /* flush its queues here since we are freeing mvm_sta */
 829                 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
 830                 if (ret)
 831                         return ret;
 832                 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
 833                                                     mvm_sta->tfd_queue_msk);
 834                 if (ret)
 835                         return ret;
 836                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
 837
 838                 /* If DQA is supported - the queues can be disabled now */
 839                 if (iwl_mvm_is_dqa_supported(mvm))
 840                         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
 841
 842                 /* if we are associated - we can't remove the AP STA now */
 843                 if (vif->bss_conf.assoc)
 844                         return ret;
 845
 846                 /* unassoc - go ahead - remove the AP STA now */
 847                 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 848
 849                 /* clear d0i3_ap_sta_id if no longer relevant */
 850                 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
 851                         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 852         }
 853
 854         /*
 855          * This shouldn't happen - the TDLS channel switch should be canceled
 856          * before the STA is removed.
 857          */
 858         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
 859                 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
 860                 cancel_delayed_work(&mvm->tdls_cs.dwork);
 861         }
 862
 863         /*
 864          * Make sure that the tx response code sees the station as -EBUSY and
 865          * calls the drain worker.
 866          */
 867         spin_lock_bh(&mvm_sta->lock);
 868         /*
 869          * There are frames pending on the AC queues for this station.
 870          * We need to wait until all the frames are drained...
 871          */
 872         if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
 873                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
 874                                    ERR_PTR(-EBUSY));
 875                 spin_unlock_bh(&mvm_sta->lock);
 876
 877                 /* disable TDLS sta queues on drain complete */
 878                 if (sta->tdls) {
 879                         mvm->tfd_drained[mvm_sta->sta_id] =
 880                                                         mvm_sta->tfd_queue_msk;
 881                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
 882                                        mvm_sta->sta_id);
 883                 }
 884
 885                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
 886         } else {
 887                 spin_unlock_bh(&mvm_sta->lock);
 888
 889                 if (sta->tdls)
 890                         iwl_mvm_tdls_sta_deinit(mvm, sta);
 891
 892                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
 893                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
 894         }
 895
 896         return ret;
 897 }
 898
 899 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
 900                       struct ieee80211_vif *vif,
 901                       u8 sta_id)
 902 {
 903         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
 904
 905         lockdep_assert_held(&mvm->mutex);
 906
 907         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 908         return ret;
 909 }
 910
 911 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
 912                              struct iwl_mvm_int_sta *sta,
 913                              u32 qmask, enum nl80211_iftype iftype)
 914 {
 915         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 916                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
 917                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
 918                         return -ENOSPC;
 919         }
 920
 921         sta->tfd_queue_msk = qmask;
 922
 923         /* put a non-NULL value so iterating over the stations won't stop */
 924         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
 925         return 0;
 926 }
 927
 928 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
 929                                     struct iwl_mvm_int_sta *sta)
 930 {
 931         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
 932         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
 933         sta->sta_id = IWL_MVM_STATION_COUNT;
 934 }
 935
 936 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
 937                                       struct iwl_mvm_int_sta *sta,
 938                                       const u8 *addr,
 939                                       u16 mac_id, u16 color)
 940 {
 941         struct iwl_mvm_add_sta_cmd cmd;
 942         int ret;
 943         u32 status;
 944
 945         lockdep_assert_held(&mvm->mutex);
 946
 947         memset(&cmd, 0, sizeof(cmd));
 948         cmd.sta_id = sta->sta_id;
 949         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
 950                                                              color));
 951
 952         cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
 953         cmd.tid_disable_tx = cpu_to_le16(0xffff);
 954
 955         if (addr)
 956                 memcpy(cmd.addr, addr, ETH_ALEN);
 957
 958         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 959                                           iwl_mvm_add_sta_cmd_size(mvm),
 960                                           &cmd, &status);
 961         if (ret)
 962                 return ret;
 963
 964         switch (status & IWL_ADD_STA_STATUS_MASK) {
 965         case ADD_STA_SUCCESS:
 966                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
 967                 return 0;
 968         default:
 969                 ret = -EIO;
 970                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
 971                         status);
 972                 break;
 973         }
 974         return ret;
 975 }
 976
 977 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
 978 {
 979         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
 980                                         mvm->cfg->base_params->wd_timeout :
 981                                         IWL_WATCHDOG_DISABLED;
 982         int ret;
 983
 984         lockdep_assert_held(&mvm->mutex);
 985
 986         /* Map Aux queue to fifo - needs to happen before adding Aux station */
 987         iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
 988                               IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
 989
 990         /* Allocate aux station and assign to it the aux queue */
 991         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
 992                                        NL80211_IFTYPE_UNSPECIFIED);
 993         if (ret)
 994                 return ret;
 995
 996         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
 997                                          MAC_INDEX_AUX, 0);
 998
 999         if (ret)
1000                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1001         return ret;
1002 }
1003
1004 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1005 {
1006         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1007
1008         lockdep_assert_held(&mvm->mutex);
1009         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1010                                          mvmvif->id, 0);
1011 }
1012
1013 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1014 {
1015         int ret;
1016
1017         lockdep_assert_held(&mvm->mutex);
1018
1019         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1020         if (ret)
1021                 IWL_WARN(mvm, "Failed sending remove station\n");
1022
1023         return ret;
1024 }
1025
1026 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1027 {
1028         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1029 }
1030
1031 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1032 {
1033         lockdep_assert_held(&mvm->mutex);
1034
1035         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1036 }
1037
1038 /*
1039  * Send the add station command for the vif's broadcast station.
1040  * Assumes that the station was already allocated.
1041  *
1042  * @mvm: the mvm component
1043  * @vif: the interface to which the broadcast station is added
1044  * @bsta: the broadcast station to add.
1045  */
1046 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1047 {
1048         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1049         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1050         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1051         const u8 *baddr = _baddr;
1052
1053         lockdep_assert_held(&mvm->mutex);
1054
1055         if (iwl_mvm_is_dqa_supported(mvm)) {
1056                 struct iwl_trans_txq_scd_cfg cfg = {
1057                         .fifo = IWL_MVM_TX_FIFO_VO,
1058                         .sta_id = mvmvif->bcast_sta.sta_id,
1059                         .tid = IWL_MAX_TID_COUNT,
1060                         .aggregate = false,
1061                         .frame_limit = IWL_FRAME_LIMIT,
1062                 };
1063                 unsigned int wdg_timeout =
1064                         iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1065                 int queue;
1066
1067                 if ((vif->type == NL80211_IFTYPE_AP) &&
1068                     (mvmvif->bcast_sta.tfd_queue_msk &
1069                      BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1070                         queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1071                 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
1072                          (mvmvif->bcast_sta.tfd_queue_msk &
1073                           BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
1074                         queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1075                 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1076                         return -EINVAL;
1077
1078                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1079                                    wdg_timeout);
1080         }
1081
1082         if (vif->type == NL80211_IFTYPE_ADHOC)
1083                 baddr = vif->bss_conf.bssid;
1084
1085         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1086                 return -ENOSPC;
1087
1088         return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1089                                           mvmvif->id, mvmvif->color);
1090 }
1091
1092 /* Send the FW a request to remove the station from it's internal data
1093  * structures, but DO NOT remove the entry from the local data structures. */
1094 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1095 {
1096         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1097         int ret;
1098
1099         lockdep_assert_held(&mvm->mutex);
1100
1101         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1102         if (ret)
1103                 IWL_WARN(mvm, "Failed sending remove station\n");
1104         return ret;
1105 }
1106
1107 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1108 {
1109         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1110         u32 qmask = 0;
1111
1112         lockdep_assert_held(&mvm->mutex);
1113
1114         if (!iwl_mvm_is_dqa_supported(mvm))
1115                 qmask = iwl_mvm_mac_get_queues_mask(vif);
1116
1117         if (vif->type == NL80211_IFTYPE_AP) {
1118                 /*
1119                  * The firmware defines the TFD queue mask to only be relevant
1120                  * for *unicast* queues, so the multicast (CAB) queue shouldn't
1121                  * be included.
1122                  */
1123                 qmask &= ~BIT(vif->cab_queue);
1124
1125                 if (iwl_mvm_is_dqa_supported(mvm))
1126                         qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1127         } else if (iwl_mvm_is_dqa_supported(mvm) &&
1128                    vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1129                 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1130         }
1131
1132         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1133                                         ieee80211_vif_type_p2p(vif));
1134 }
1135
1136 /* Allocate a new station entry for the broadcast station to the given vif,
1137  * and send it to the FW.
1138  * Note that each P2P mac should have its own broadcast station.
1139  *
1140  * @mvm: the mvm component
1141  * @vif: the interface to which the broadcast station is added
1142  * @bsta: the broadcast station to add. */
1143 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1144 {
1145         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1146         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1147         int ret;
1148
1149         lockdep_assert_held(&mvm->mutex);
1150
1151         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1152         if (ret)
1153                 return ret;
1154
1155         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1156
1157         if (ret)
1158                 iwl_mvm_dealloc_int_sta(mvm, bsta);
1159
1160         return ret;
1161 }
1162
1163 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1164 {
1165         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1166
1167         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1168 }
1169
1170 /*
1171  * Send the FW a request to remove the station from it's internal data
1172  * structures, and in addition remove it from the local data structure.
1173  */
1174 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1175 {
1176         int ret;
1177
1178         lockdep_assert_held(&mvm->mutex);
1179
1180         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1181
1182         iwl_mvm_dealloc_bcast_sta(mvm, vif);
1183
1184         return ret;
1185 }
1186
1187 #define IWL_MAX_RX_BA_SESSIONS 16
1188
1189 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1190 {
1191         struct iwl_mvm_delba_notif notif = {
1192                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1193                 .metadata.sync = 1,
1194                 .delba.baid = baid,
1195         };
1196         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1197 };
1198
1199 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1200                                  struct iwl_mvm_baid_data *data)
1201 {
1202         int i;
1203
1204         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
1205
1206         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1207                 int j;
1208                 struct iwl_mvm_reorder_buffer *reorder_buf =
1209                         &data->reorder_buf[i];
1210
1211                 spin_lock_bh(&reorder_buf->lock);
1212                 if (likely(!reorder_buf->num_stored)) {
1213                         spin_unlock_bh(&reorder_buf->lock);
1214                         continue;
1215                 }
1216
1217                 /*
1218                  * This shouldn't happen in regular DELBA since the internal
1219                  * delBA notification should trigger a release of all frames in
1220                  * the reorder buffer.
1221                  */
1222                 WARN_ON(1);
1223
1224                 for (j = 0; j < reorder_buf->buf_size; j++)
1225                         __skb_queue_purge(&reorder_buf->entries[j]);
1226                 /*
1227                  * Prevent timer re-arm. This prevents a very far fetched case
1228                  * where we timed out on the notification. There may be prior
1229                  * RX frames pending in the RX queue before the notification
1230                  * that might get processed between now and the actual deletion
1231                  * and we would re-arm the timer although we are deleting the
1232                  * reorder buffer.
1233                  */
1234                 reorder_buf->removed = true;
1235                 spin_unlock_bh(&reorder_buf->lock);
1236                 del_timer_sync(&reorder_buf->reorder_timer);
1237         }
1238 }
1239
1240 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
1241                                         u32 sta_id,
1242                                         struct iwl_mvm_baid_data *data,
1243                                         u16 ssn, u8 buf_size)
1244 {
1245         int i;
1246
1247         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1248                 struct iwl_mvm_reorder_buffer *reorder_buf =
1249                         &data->reorder_buf[i];
1250                 int j;
1251
1252                 reorder_buf->num_stored = 0;
1253                 reorder_buf->head_sn = ssn;
1254                 reorder_buf->buf_size = buf_size;
1255                 /* rx reorder timer */
1256                 reorder_buf->reorder_timer.function =
1257                         iwl_mvm_reorder_timer_expired;
1258                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
1259                 init_timer(&reorder_buf->reorder_timer);
1260                 spin_lock_init(&reorder_buf->lock);
1261                 reorder_buf->mvm = mvm;
1262                 reorder_buf->queue = i;
1263                 reorder_buf->sta_id = sta_id;
1264                 for (j = 0; j < reorder_buf->buf_size; j++)
1265                         __skb_queue_head_init(&reorder_buf->entries[j]);
1266         }
1267 }
1268
1269 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1270                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
1271 {
1272         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1273         struct iwl_mvm_add_sta_cmd cmd = {};
1274         struct iwl_mvm_baid_data *baid_data = NULL;
1275         int ret;
1276         u32 status;
1277
1278         lockdep_assert_held(&mvm->mutex);
1279
1280         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1281                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1282                 return -ENOSPC;
1283         }
1284
1285         if (iwl_mvm_has_new_rx_api(mvm) && start) {
1286                 /*
1287                  * Allocate here so if allocation fails we can bail out early
1288                  * before starting the BA session in the firmware
1289                  */
1290                 baid_data = kzalloc(sizeof(*baid_data) +
1291                                     mvm->trans->num_rx_queues *
1292                                     sizeof(baid_data->reorder_buf[0]),
1293                                     GFP_KERNEL);
1294                 if (!baid_data)
1295                         return -ENOMEM;
1296         }
1297
1298         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1299         cmd.sta_id = mvm_sta->sta_id;
1300         cmd.add_modify = STA_MODE_MODIFY;
1301         if (start) {
1302                 cmd.add_immediate_ba_tid = (u8) tid;
1303                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1304                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1305         } else {
1306                 cmd.remove_immediate_ba_tid = (u8) tid;
1307         }
1308         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
1309                                   STA_MODIFY_REMOVE_BA_TID;
1310
1311         status = ADD_STA_SUCCESS;
1312         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1313                                           iwl_mvm_add_sta_cmd_size(mvm),
1314                                           &cmd, &status);
1315         if (ret)
1316                 goto out_free;
1317
1318         switch (status & IWL_ADD_STA_STATUS_MASK) {
1319         case ADD_STA_SUCCESS:
1320                 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
1321                                start ? "start" : "stopp");
1322                 break;
1323         case ADD_STA_IMMEDIATE_BA_FAILURE:
1324                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
1325                 ret = -ENOSPC;
1326                 break;
1327         default:
1328                 ret = -EIO;
1329                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
1330                         start ? "start" : "stopp", status);
1331                 break;
1332         }
1333
1334         if (ret)
1335                 goto out_free;
1336
1337         if (start) {
1338                 u8 baid;
1339
1340                 mvm->rx_ba_sessions++;
1341
1342                 if (!iwl_mvm_has_new_rx_api(mvm))
1343                         return 0;
1344
1345                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
1346                         ret = -EINVAL;
1347                         goto out_free;
1348                 }
1349                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
1350                             IWL_ADD_STA_BAID_SHIFT);
1351                 baid_data->baid = baid;
1352                 baid_data->timeout = timeout;
1353                 baid_data->last_rx = jiffies;
1354                 init_timer(&baid_data->session_timer);
1355                 baid_data->session_timer.function =
1356                         iwl_mvm_rx_agg_session_expired;
1357                 baid_data->session_timer.data =
1358                         (unsigned long)&mvm->baid_map[baid];
1359                 baid_data->mvm = mvm;
1360                 baid_data->tid = tid;
1361                 baid_data->sta_id = mvm_sta->sta_id;
1362
1363                 mvm_sta->tid_to_baid[tid] = baid;
1364                 if (timeout)
1365                         mod_timer(&baid_data->session_timer,
1366                                   TU_TO_EXP_TIME(timeout * 2));
1367
1368                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
1369                                             baid_data, ssn, buf_size);
1370                 /*
1371                  * protect the BA data with RCU to cover a case where our
1372                  * internal RX sync mechanism will timeout (not that it's
1373                  * supposed to happen) and we will free the session data while
1374                  * RX is being processed in parallel
1375                  */
1376                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
1377                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
1378         } else if (mvm->rx_ba_sessions > 0) {
1379                 u8 baid = mvm_sta->tid_to_baid[tid];
1380
1381                 /* check that restart flow didn't zero the counter */
1382                 mvm->rx_ba_sessions--;
1383                 if (!iwl_mvm_has_new_rx_api(mvm))
1384                         return 0;
1385
1386                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1387                         return -EINVAL;
1388
1389                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
1390                 if (WARN_ON(!baid_data))
1391                         return -EINVAL;
1392
1393                 /* synchronize all rx queues so we can safely delete */
1394                 iwl_mvm_free_reorder(mvm, baid_data);
1395                 del_timer_sync(&baid_data->session_timer);
1396                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
1397                 kfree_rcu(baid_data, rcu_head);
1398         }
1399         return 0;
1400
1401 out_free:
1402         kfree(baid_data);
1403         return ret;
1404 }
1405
1406 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1407                               int tid, u8 queue, bool start)
1408 {
1409         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1410         struct iwl_mvm_add_sta_cmd cmd = {};
1411         int ret;
1412         u32 status;
1413
1414         lockdep_assert_held(&mvm->mutex);
1415
1416         if (start) {
1417                 mvm_sta->tfd_queue_msk |= BIT(queue);
1418                 mvm_sta->tid_disable_agg &= ~BIT(tid);
1419         } else {
1420                 /* In DQA-mode the queue isn't removed on agg termination */
1421                 if (!iwl_mvm_is_dqa_supported(mvm))
1422                         mvm_sta->tfd_queue_msk &= ~BIT(queue);
1423                 mvm_sta->tid_disable_agg |= BIT(tid);
1424         }
1425
1426         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1427         cmd.sta_id = mvm_sta->sta_id;
1428         cmd.add_modify = STA_MODE_MODIFY;
1429         cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
1430         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
1431         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
1432
1433         status = ADD_STA_SUCCESS;
1434         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1435                                           iwl_mvm_add_sta_cmd_size(mvm),
1436                                           &cmd, &status);
1437         if (ret)
1438                 return ret;
1439
1440         switch (status & IWL_ADD_STA_STATUS_MASK) {
1441         case ADD_STA_SUCCESS:
1442                 break;
1443         default:
1444                 ret = -EIO;
1445                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
1446                         start ? "start" : "stopp", status);
1447                 break;
1448         }
1449
1450         return ret;
1451 }
1452
1453 const u8 tid_to_mac80211_ac[] = {
1454         IEEE80211_AC_BE,
1455         IEEE80211_AC_BK,
1456         IEEE80211_AC_BK,
1457         IEEE80211_AC_BE,
1458         IEEE80211_AC_VI,
1459         IEEE80211_AC_VI,
1460         IEEE80211_AC_VO,
1461         IEEE80211_AC_VO,
1462 };
1463
1464 static const u8 tid_to_ucode_ac[] = {
1465         AC_BE,
1466         AC_BK,
1467         AC_BK,
1468         AC_BE,
1469         AC_VI,
1470         AC_VI,
1471         AC_VO,
1472         AC_VO,
1473 };
1474
1475 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1476                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1477 {
1478         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1479         struct iwl_mvm_tid_data *tid_data;
1480         int txq_id;
1481         int ret;
1482
1483         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1484                 return -EINVAL;
1485
1486         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
1487                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
1488                         mvmsta->tid_data[tid].state);
1489                 return -ENXIO;
1490         }
1491
1492         lockdep_assert_held(&mvm->mutex);
1493
1494         spin_lock_bh(&mvmsta->lock);
1495
1496         /* possible race condition - we entered D0i3 while starting agg */
1497         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
1498                 spin_unlock_bh(&mvmsta->lock);
1499                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
1500                 return -EIO;
1501         }
1502
1503         spin_lock_bh(&mvm->queue_info_lock);
1504
1505         /*
1506          * Note the possible cases:
1507          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
1508          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
1509          *      one and mark it as reserved
1510          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
1511          *      non-DQA mode, since the TXQ hasn't yet been allocated
1512          */
1513         txq_id = mvmsta->tid_data[tid].txq_id;
1514         if (!iwl_mvm_is_dqa_supported(mvm) ||
1515             mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
1516                 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
1517                                                  mvm->last_agg_queue);
1518                 if (txq_id < 0) {
1519                         ret = txq_id;
1520                         spin_unlock_bh(&mvm->queue_info_lock);
1521                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
1522                         goto release_locks;
1523                 }
1524
1525                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
1526                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
1527         }
1528         spin_unlock_bh(&mvm->queue_info_lock);
1529
1530         IWL_DEBUG_TX_QUEUES(mvm,
1531                             "AGG for tid %d will be on queue #%d\n",
1532                             tid, txq_id);
1533
1534         tid_data = &mvmsta->tid_data[tid];
1535         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1536         tid_data->txq_id = txq_id;
1537         *ssn = tid_data->ssn;
1538
1539         IWL_DEBUG_TX_QUEUES(mvm,
1540                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1541                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1542                             tid_data->next_reclaimed);
1543
1544         if (tid_data->ssn == tid_data->next_reclaimed) {
1545                 tid_data->state = IWL_AGG_STARTING;
1546                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1547         } else {
1548                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
1549         }
1550
1551         ret = 0;
1552
1553 release_locks:
1554         spin_unlock_bh(&mvmsta->lock);
1555
1556         return ret;
1557 }
1558
1559 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1560                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
1561                             bool amsdu)
1562 {
1563         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1564         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1565         unsigned int wdg_timeout =
1566                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1567         int queue, ret;
1568         bool alloc_queue = true;
1569         u16 ssn;
1570
1571         struct iwl_trans_txq_scd_cfg cfg = {
1572                 .sta_id = mvmsta->sta_id,
1573                 .tid = tid,
1574                 .frame_limit = buf_size,
1575                 .aggregate = true,
1576         };
1577
1578         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1579                      != IWL_MAX_TID_COUNT);
1580
1581         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1582
1583         spin_lock_bh(&mvmsta->lock);
1584         ssn = tid_data->ssn;
1585         queue = tid_data->txq_id;
1586         tid_data->state = IWL_AGG_ON;
1587         mvmsta->agg_tids |= BIT(tid);
1588         tid_data->ssn = 0xffff;
1589         tid_data->amsdu_in_ampdu_allowed = amsdu;
1590         spin_unlock_bh(&mvmsta->lock);
1591
1592         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1593
1594         /* In DQA mode, the existing queue might need to be reconfigured */
1595         if (iwl_mvm_is_dqa_supported(mvm)) {
1596                 spin_lock_bh(&mvm->queue_info_lock);
1597                 /* Maybe there is no need to even alloc a queue... */
1598                 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
1599                         alloc_queue = false;
1600                 spin_unlock_bh(&mvm->queue_info_lock);
1601
1602                 /*
1603                  * Only reconfig the SCD for the queue if the window size has
1604                  * changed from current (become smaller)
1605                  */
1606                 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
1607                         /*
1608                          * If reconfiguring an existing queue, it first must be
1609                          * drained
1610                          */
1611                         ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1612                                                             BIT(queue));
1613                         if (ret) {
1614                                 IWL_ERR(mvm,
1615                                         "Error draining queue before reconfig\n");
1616                                 return ret;
1617                         }
1618
1619                         ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
1620                                                    mvmsta->sta_id, tid,
1621                                                    buf_size, ssn);
1622                         if (ret) {
1623                                 IWL_ERR(mvm,
1624                                         "Error reconfiguring TXQ #%d\n", queue);
1625                                 return ret;
1626                         }
1627                 }
1628         }
1629
1630         if (alloc_queue)
1631                 iwl_mvm_enable_txq(mvm, queue,
1632                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
1633                                    &cfg, wdg_timeout);
1634
1635         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1636         if (ret)
1637                 return -EIO;
1638
1639         /* No need to mark as reserved */
1640         spin_lock_bh(&mvm->queue_info_lock);
1641         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1642         spin_unlock_bh(&mvm->queue_info_lock);
1643
1644         /*
1645          * Even though in theory the peer could have different
1646          * aggregation reorder buffer sizes for different sessions,
1647          * our ucode doesn't allow for that and has a global limit
1648          * for each station. Therefore, use the minimum of all the
1649          * aggregation sessions and our default value.
1650          */
1651         mvmsta->max_agg_bufsize =
1652                 min(mvmsta->max_agg_bufsize, buf_size);
1653         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1654
1655         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1656                      sta->addr, tid);
1657
1658         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1659 }
1660
1661 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1662                             struct ieee80211_sta *sta, u16 tid)
1663 {
1664         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1665         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1666         u16 txq_id;
1667         int err;
1668
1669
1670         /*
1671          * If mac80211 is cleaning its state, then say that we finished since
1672          * our state has been cleared anyway.
1673          */
1674         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1675                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1676                 return 0;
1677         }
1678
1679         spin_lock_bh(&mvmsta->lock);
1680
1681         txq_id = tid_data->txq_id;
1682
1683         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1684                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1685
1686         mvmsta->agg_tids &= ~BIT(tid);
1687
1688         spin_lock_bh(&mvm->queue_info_lock);
1689         /*
1690          * The TXQ is marked as reserved only if no traffic came through yet
1691          * This means no traffic has been sent on this TID (agg'd or not), so
1692          * we no longer have use for the queue. Since it hasn't even been
1693          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1694          * free.
1695          */
1696         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1697                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
1698         spin_unlock_bh(&mvm->queue_info_lock);
1699
1700         switch (tid_data->state) {
1701         case IWL_AGG_ON:
1702                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1703
1704                 IWL_DEBUG_TX_QUEUES(mvm,
1705                                     "ssn = %d, next_recl = %d\n",
1706                                     tid_data->ssn, tid_data->next_reclaimed);
1707
1708                 /* There are still packets for this RA / TID in the HW */
1709                 if (tid_data->ssn != tid_data->next_reclaimed) {
1710                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1711                         err = 0;
1712                         break;
1713                 }
1714
1715                 tid_data->ssn = 0xffff;
1716                 tid_data->state = IWL_AGG_OFF;
1717                 spin_unlock_bh(&mvmsta->lock);
1718
1719                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1720
1721                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1722
1723                 if (!iwl_mvm_is_dqa_supported(mvm)) {
1724                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1725
1726                         iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
1727                 }
1728                 return 0;
1729         case IWL_AGG_STARTING:
1730         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1731                 /*
1732                  * The agg session has been stopped before it was set up. This
1733                  * can happen when the AddBA timer times out for example.
1734                  */
1735
1736                 /* No barriers since we are under mutex */
1737                 lockdep_assert_held(&mvm->mutex);
1738
1739                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1740                 tid_data->state = IWL_AGG_OFF;
1741                 err = 0;
1742                 break;
1743         default:
1744                 IWL_ERR(mvm,
1745                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1746                         mvmsta->sta_id, tid, tid_data->state);
1747                 IWL_ERR(mvm,
1748                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1749                 err = -EINVAL;
1750         }
1751
1752         spin_unlock_bh(&mvmsta->lock);
1753
1754         return err;
1755 }
1756
1757 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1758                             struct ieee80211_sta *sta, u16 tid)
1759 {
1760         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1761         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1762         u16 txq_id;
1763         enum iwl_mvm_agg_state old_state;
1764
1765         /*
1766          * First set the agg state to OFF to avoid calling
1767          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1768          */
1769         spin_lock_bh(&mvmsta->lock);
1770         txq_id = tid_data->txq_id;
1771         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1772                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1773         old_state = tid_data->state;
1774         tid_data->state = IWL_AGG_OFF;
1775         mvmsta->agg_tids &= ~BIT(tid);
1776         spin_unlock_bh(&mvmsta->lock);
1777
1778         spin_lock_bh(&mvm->queue_info_lock);
1779         /*
1780          * The TXQ is marked as reserved only if no traffic came through yet
1781          * This means no traffic has been sent on this TID (agg'd or not), so
1782          * we no longer have use for the queue. Since it hasn't even been
1783          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1784          * free.
1785          */
1786         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1787                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
1788         spin_unlock_bh(&mvm->queue_info_lock);
1789
1790         if (old_state >= IWL_AGG_ON) {
1791                 iwl_mvm_drain_sta(mvm, mvmsta, true);
1792                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1793                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1794                 iwl_trans_wait_tx_queue_empty(mvm->trans,
1795                                               mvmsta->tfd_queue_msk);
1796                 iwl_mvm_drain_sta(mvm, mvmsta, false);
1797
1798                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1799
1800                 if (!iwl_mvm_is_dqa_supported(mvm)) {
1801                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1802
1803                         iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
1804                                             tid, 0);
1805                 }
1806         }
1807
1808         return 0;
1809 }
1810
1811 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1812 {
1813         int i, max = -1, max_offs = -1;
1814
1815         lockdep_assert_held(&mvm->mutex);
1816
1817         /* Pick the unused key offset with the highest 'deleted'
1818          * counter. Every time a key is deleted, all the counters
1819          * are incremented and the one that was just deleted is
1820          * reset to zero. Thus, the highest counter is the one
1821          * that was deleted longest ago. Pick that one.
1822          */
1823         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1824                 if (test_bit(i, mvm->fw_key_table))
1825                         continue;
1826                 if (mvm->fw_key_deleted[i] > max) {
1827                         max = mvm->fw_key_deleted[i];
1828                         max_offs = i;
1829                 }
1830         }
1831
1832         if (max_offs < 0)
1833                 return STA_KEY_IDX_INVALID;
1834
1835         return max_offs;
1836 }
1837
1838 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
1839                                                struct ieee80211_vif *vif,
1840                                                struct ieee80211_sta *sta)
1841 {
1842         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1843
1844         if (sta)
1845                 return iwl_mvm_sta_from_mac80211(sta);
1846
1847         /*
1848          * The device expects GTKs for station interfaces to be
1849          * installed as GTKs for the AP station. If we have no
1850          * station ID, then use AP's station ID.
1851          */
1852         if (vif->type == NL80211_IFTYPE_STATION &&
1853             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1854                 u8 sta_id = mvmvif->ap_sta_id;
1855
1856                 /*
1857                  * It is possible that the 'sta' parameter is NULL,
1858                  * for example when a GTK is removed - the sta_id will then
1859                  * be the AP ID, and no station was passed by mac80211.
1860                  */
1861                 return iwl_mvm_sta_from_staid_protected(mvm, sta_id);
1862         }
1863
1864         return NULL;
1865 }
1866
1867 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1868                                 struct iwl_mvm_sta *mvm_sta,
1869                                 struct ieee80211_key_conf *keyconf, bool mcast,
1870                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1871                                 u8 key_offset)
1872 {
1873         struct iwl_mvm_add_sta_key_cmd cmd = {};
1874         __le16 key_flags;
1875         int ret;
1876         u32 status;
1877         u16 keyidx;
1878         int i;
1879         u8 sta_id = mvm_sta->sta_id;
1880
1881         keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1882                  STA_KEY_FLG_KEYID_MSK;
1883         key_flags = cpu_to_le16(keyidx);
1884         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1885
1886         switch (keyconf->cipher) {
1887         case WLAN_CIPHER_SUITE_TKIP:
1888                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1889                 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1890                 for (i = 0; i < 5; i++)
1891                         cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1892                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1893                 break;
1894         case WLAN_CIPHER_SUITE_CCMP:
1895                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1896                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1897                 break;
1898         case WLAN_CIPHER_SUITE_WEP104:
1899                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1900                 /* fall through */
1901         case WLAN_CIPHER_SUITE_WEP40:
1902                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1903                 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1904                 break;
1905         default:
1906                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1907                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1908         }
1909
1910         if (mcast)
1911                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1912
1913         cmd.key_offset = key_offset;
1914         cmd.key_flags = key_flags;
1915         cmd.sta_id = sta_id;
1916
1917         status = ADD_STA_SUCCESS;
1918         if (cmd_flags & CMD_ASYNC)
1919                 ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1920                                             sizeof(cmd), &cmd);
1921         else
1922                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1923                                                   &cmd, &status);
1924
1925         switch (status) {
1926         case ADD_STA_SUCCESS:
1927                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1928                 break;
1929         default:
1930                 ret = -EIO;
1931                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1932                 break;
1933         }
1934
1935         return ret;
1936 }
1937
1938 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1939                                  struct ieee80211_key_conf *keyconf,
1940                                  u8 sta_id, bool remove_key)
1941 {
1942         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1943
1944         /* verify the key details match the required command's expectations */
1945         if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1946                     (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1947                     (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1948                 return -EINVAL;
1949
1950         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1951         igtk_cmd.sta_id = cpu_to_le32(sta_id);
1952
1953         if (remove_key) {
1954                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1955         } else {
1956                 struct ieee80211_key_seq seq;
1957                 const u8 *pn;
1958
1959                 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1960                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1961                 pn = seq.aes_cmac.pn;
1962                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1963                                                        ((u64) pn[4] << 8) |
1964                                                        ((u64) pn[3] << 16) |
1965                                                        ((u64) pn[2] << 24) |
1966                                                        ((u64) pn[1] << 32) |
1967                                                        ((u64) pn[0] << 40));
1968         }
1969
1970         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1971                        remove_key ? "removing" : "installing",
1972                        igtk_cmd.sta_id);
1973
1974         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1975                                     sizeof(igtk_cmd), &igtk_cmd);
1976 }
1977
1978
1979 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1980                                        struct ieee80211_vif *vif,
1981                                        struct ieee80211_sta *sta)
1982 {
1983         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1984
1985         if (sta)
1986                 return sta->addr;
1987
1988         if (vif->type == NL80211_IFTYPE_STATION &&
1989             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1990                 u8 sta_id = mvmvif->ap_sta_id;
1991                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1992                                                 lockdep_is_held(&mvm->mutex));
1993                 return sta->addr;
1994         }
1995
1996
1997         return NULL;
1998 }
1999
2000 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2001                                  struct ieee80211_vif *vif,
2002                                  struct ieee80211_sta *sta,
2003                                  struct ieee80211_key_conf *keyconf,
2004                                  u8 key_offset,
2005                                  bool mcast)
2006 {
2007         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2008         int ret;
2009         const u8 *addr;
2010         struct ieee80211_key_seq seq;
2011         u16 p1k[5];
2012
2013         switch (keyconf->cipher) {
2014         case WLAN_CIPHER_SUITE_TKIP:
2015                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2016                 /* get phase 1 key from mac80211 */
2017                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2018                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2019                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2020                                            seq.tkip.iv32, p1k, 0, key_offset);
2021                 break;
2022         case WLAN_CIPHER_SUITE_CCMP:
2023         case WLAN_CIPHER_SUITE_WEP40:
2024         case WLAN_CIPHER_SUITE_WEP104:
2025                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2026                                            0, NULL, 0, key_offset);
2027                 break;
2028         default:
2029                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2030                                            0, NULL, 0, key_offset);
2031         }
2032
2033         return ret;
2034 }
2035
2036 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2037                                     struct ieee80211_key_conf *keyconf,
2038                                     bool mcast)
2039 {
2040         struct iwl_mvm_add_sta_key_cmd cmd = {};
2041         __le16 key_flags;
2042         int ret;
2043         u32 status;
2044
2045         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2046                                  STA_KEY_FLG_KEYID_MSK);
2047         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2048         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2049
2050         if (mcast)
2051                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2052
2053         cmd.key_flags = key_flags;
2054         cmd.key_offset = keyconf->hw_key_idx;
2055         cmd.sta_id = sta_id;
2056
2057         status = ADD_STA_SUCCESS;
2058         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2059                                           &cmd, &status);
2060
2061         switch (status) {
2062         case ADD_STA_SUCCESS:
2063                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2064                 break;
2065         default:
2066                 ret = -EIO;
2067                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2068                 break;
2069         }
2070
2071         return ret;
2072 }
2073
2074 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2075                         struct ieee80211_vif *vif,
2076                         struct ieee80211_sta *sta,
2077                         struct ieee80211_key_conf *keyconf,
2078                         u8 key_offset)
2079 {
2080         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2081         struct iwl_mvm_sta *mvm_sta;
2082         u8 sta_id;
2083         int ret;
2084         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
2085
2086         lockdep_assert_held(&mvm->mutex);
2087
2088         /* Get the station id from the mvm local station table */
2089         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2090         if (!mvm_sta) {
2091                 IWL_ERR(mvm, "Failed to find station\n");
2092                 return -EINVAL;
2093         }
2094         sta_id = mvm_sta->sta_id;
2095
2096         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
2097                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2098                 goto end;
2099         }
2100
2101         /*
2102          * It is possible that the 'sta' parameter is NULL, and thus
2103          * there is a need to retrieve  the sta from the local station table.
2104          */
2105         if (!sta) {
2106                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2107                                                 lockdep_is_held(&mvm->mutex));
2108                 if (IS_ERR_OR_NULL(sta)) {
2109                         IWL_ERR(mvm, "Invalid station id\n");
2110                         return -EINVAL;
2111                 }
2112         }
2113
2114         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2115                 return -EINVAL;
2116
2117         /* If the key_offset is not pre-assigned, we need to find a
2118          * new offset to use.  In normal cases, the offset is not
2119          * pre-assigned, but during HW_RESTART we want to reuse the
2120          * same indices, so we pass them when this function is called.
2121          *
2122          * In D3 entry, we need to hardcoded the indices (because the
2123          * firmware hardcodes the PTK offset to 0).  In this case, we
2124          * need to make sure we don't overwrite the hw_key_idx in the
2125          * keyconf structure, because otherwise we cannot configure
2126          * the original ones back when resuming.
2127          */
2128         if (key_offset == STA_KEY_IDX_INVALID) {
2129                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
2130                 if (key_offset == STA_KEY_IDX_INVALID)
2131                         return -ENOSPC;
2132                 keyconf->hw_key_idx = key_offset;
2133         }
2134
2135         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2136         if (ret)
2137                 goto end;
2138
2139         /*
2140          * For WEP, the same key is used for multicast and unicast. Upload it
2141          * again, using the same key offset, and now pointing the other one
2142          * to the same key slot (offset).
2143          * If this fails, remove the original as well.
2144          */
2145         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2146             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2147                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
2148                                             key_offset, !mcast);
2149                 if (ret) {
2150                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2151                         goto end;
2152                 }
2153         }
2154
2155         __set_bit(key_offset, mvm->fw_key_table);
2156
2157 end:
2158         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
2159                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2160                       sta ? sta->addr : zero_addr, ret);
2161         return ret;
2162 }
2163
2164 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
2165                            struct ieee80211_vif *vif,
2166                            struct ieee80211_sta *sta,
2167                            struct ieee80211_key_conf *keyconf)
2168 {
2169         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2170         struct iwl_mvm_sta *mvm_sta;
2171         u8 sta_id = IWL_MVM_STATION_COUNT;
2172         int ret, i;
2173
2174         lockdep_assert_held(&mvm->mutex);
2175
2176         /* Get the station from the mvm local station table */
2177         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2178
2179         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
2180                       keyconf->keyidx, sta_id);
2181
2182         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2183                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
2184
2185         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
2186                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
2187                         keyconf->hw_key_idx);
2188                 return -ENOENT;
2189         }
2190
2191         /* track which key was deleted last */
2192         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2193                 if (mvm->fw_key_deleted[i] < U8_MAX)
2194                         mvm->fw_key_deleted[i]++;
2195         }
2196         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
2197
2198         if (!mvm_sta) {
2199                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
2200                 return 0;
2201         }
2202
2203         sta_id = mvm_sta->sta_id;
2204
2205         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2206         if (ret)
2207                 return ret;
2208
2209         /* delete WEP key twice to get rid of (now useless) offset */
2210         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2211             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
2212                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
2213
2214         return ret;
2215 }
2216
2217 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
2218                              struct ieee80211_vif *vif,
2219                              struct ieee80211_key_conf *keyconf,
2220                              struct ieee80211_sta *sta, u32 iv32,
2221                              u16 *phase1key)
2222 {
2223         struct iwl_mvm_sta *mvm_sta;
2224         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2225
2226         rcu_read_lock();
2227
2228         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2229         if (WARN_ON_ONCE(!mvm_sta))
2230                 goto unlock;
2231         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2232                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2233
2234  unlock:
2235         rcu_read_unlock();
2236 }
2237
2238 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
2239                                 struct ieee80211_sta *sta)
2240 {
2241         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2242         struct iwl_mvm_add_sta_cmd cmd = {
2243                 .add_modify = STA_MODE_MODIFY,
2244                 .sta_id = mvmsta->sta_id,
2245                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
2246                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2247         };
2248         int ret;
2249
2250         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2251                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2252         if (ret)
2253                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2254 }
2255
2256 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
2257                                        struct ieee80211_sta *sta,
2258                                        enum ieee80211_frame_release_type reason,
2259                                        u16 cnt, u16 tids, bool more_data,
2260                                        bool agg)
2261 {
2262         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2263         struct iwl_mvm_add_sta_cmd cmd = {
2264                 .add_modify = STA_MODE_MODIFY,
2265                 .sta_id = mvmsta->sta_id,
2266                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
2267                 .sleep_tx_count = cpu_to_le16(cnt),
2268                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2269         };
2270         int tid, ret;
2271         unsigned long _tids = tids;
2272
2273         /* convert TIDs to ACs - we don't support TSPEC so that's OK
2274          * Note that this field is reserved and unused by firmware not
2275          * supporting GO uAPSD, so it's safe to always do this.
2276          */
2277         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
2278                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
2279
2280         /* If we're releasing frames from aggregation queues then check if the
2281          * all queues combined that we're releasing frames from have
2282          *  - more frames than the service period, in which case more_data
2283          *    needs to be set
2284          *  - fewer than 'cnt' frames, in which case we need to adjust the
2285          *    firmware command (but do that unconditionally)
2286          */
2287         if (agg) {
2288                 int remaining = cnt;
2289                 int sleep_tx_count;
2290
2291                 spin_lock_bh(&mvmsta->lock);
2292                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
2293                         struct iwl_mvm_tid_data *tid_data;
2294                         u16 n_queued;
2295
2296                         tid_data = &mvmsta->tid_data[tid];
2297                         if (WARN(tid_data->state != IWL_AGG_ON &&
2298                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
2299                                  "TID %d state is %d\n",
2300                                  tid, tid_data->state)) {
2301                                 spin_unlock_bh(&mvmsta->lock);
2302                                 ieee80211_sta_eosp(sta);
2303                                 return;
2304                         }
2305
2306                         n_queued = iwl_mvm_tid_queued(tid_data);
2307                         if (n_queued > remaining) {
2308                                 more_data = true;
2309                                 remaining = 0;
2310                                 break;
2311                         }
2312                         remaining -= n_queued;
2313                 }
2314                 sleep_tx_count = cnt - remaining;
2315                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
2316                         mvmsta->sleep_tx_count = sleep_tx_count;
2317                 spin_unlock_bh(&mvmsta->lock);
2318
2319                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2320                 if (WARN_ON(cnt - remaining == 0)) {
2321                         ieee80211_sta_eosp(sta);
2322                         return;
2323                 }
2324         }
2325
2326         /* Note: this is ignored by firmware not supporting GO uAPSD */
2327         if (more_data)
2328                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
2329
2330         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
2331                 mvmsta->next_status_eosp = true;
2332                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
2333         } else {
2334                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
2335         }
2336
2337         /* block the Tx queues until the FW updated the sleep Tx count */
2338         iwl_trans_block_txq_ptrs(mvm->trans, true);
2339
2340         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
2341                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
2342                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2343         if (ret)
2344                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2345 }
2346
2347 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
2348                            struct iwl_rx_cmd_buffer *rxb)
2349 {
2350         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2351         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
2352         struct ieee80211_sta *sta;
2353         u32 sta_id = le32_to_cpu(notif->sta_id);
2354
2355         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
2356                 return;
2357
2358         rcu_read_lock();
2359         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2360         if (!IS_ERR_OR_NULL(sta))
2361                 ieee80211_sta_eosp(sta);
2362         rcu_read_unlock();
2363 }
2364
2365 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
2366                                    struct iwl_mvm_sta *mvmsta, bool disable)
2367 {
2368         struct iwl_mvm_add_sta_cmd cmd = {
2369                 .add_modify = STA_MODE_MODIFY,
2370                 .sta_id = mvmsta->sta_id,
2371                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
2372                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
2373                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2374         };
2375         int ret;
2376
2377         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2378                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2379         if (ret)
2380                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2381 }
2382
2383 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
2384                                       struct ieee80211_sta *sta,
2385                                       bool disable)
2386 {
2387         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2388
2389         spin_lock_bh(&mvm_sta->lock);
2390
2391         if (mvm_sta->disable_tx == disable) {
2392                 spin_unlock_bh(&mvm_sta->lock);
2393                 return;
2394         }
2395
2396         mvm_sta->disable_tx = disable;
2397
2398         /*
2399          * Tell mac80211 to start/stop queuing tx for this station,
2400          * but don't stop queuing if there are still pending frames
2401          * for this station.
2402          */
2403         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
2404                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
2405
2406         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
2407
2408         spin_unlock_bh(&mvm_sta->lock);
2409 }
2410
2411 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
2412                                        struct iwl_mvm_vif *mvmvif,
2413                                        bool disable)
2414 {
2415         struct ieee80211_sta *sta;
2416         struct iwl_mvm_sta *mvm_sta;
2417         int i;
2418
2419         lockdep_assert_held(&mvm->mutex);
2420
2421         /* Block/unblock all the stations of the given mvmvif */
2422         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
2423                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
2424                                                 lockdep_is_held(&mvm->mutex));
2425                 if (IS_ERR_OR_NULL(sta))
2426                         continue;
2427
2428                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2429                 if (mvm_sta->mac_id_n_color !=
2430                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
2431                         continue;
2432
2433                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
2434         }
2435 }
2436
2437 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2438 {
2439         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2440         struct iwl_mvm_sta *mvmsta;
2441
2442         rcu_read_lock();
2443
2444         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
2445
2446         if (!WARN_ON(!mvmsta))
2447                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2448
2449         rcu_read_unlock();
2450 }