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

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