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

   1 /******************************************************************************
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   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  *
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  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
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  34  *
  35  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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  52  *    from this software without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67 #include <net/mac80211.h>
  68
  69 #include "mvm.h"
  70 #include "sta.h"
  71 #include "rs.h"
  72
  73 /*
  74  * New version of ADD_STA_sta command added new fields at the end of the
  75  * structure, so sending the size of the relevant API's structure is enough to
  76  * support both API versions.
  77  */
  78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
  79 {
  80         if (iwl_mvm_has_new_rx_api(mvm) ||
  81             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
  82                 return sizeof(struct iwl_mvm_add_sta_cmd);
  83         else
  84                 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
  85 }
  86
  87 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
  88                                     enum nl80211_iftype iftype)
  89 {
  90         int sta_id;
  91         u32 reserved_ids = 0;
  92
  93         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
  94         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
  95
  96         lockdep_assert_held(&mvm->mutex);
  97
  98         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
  99         if (iftype != NL80211_IFTYPE_STATION)
 100                 reserved_ids = BIT(0);
 101
 102         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
 103         for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
 104                 if (BIT(sta_id) & reserved_ids)
 105                         continue;
 106
 107                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 108                                                lockdep_is_held(&mvm->mutex)))
 109                         return sta_id;
 110         }
 111         return IWL_MVM_INVALID_STA;
 112 }
 113
 114 /* send station add/update command to firmware */
 115 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 116                            bool update, unsigned int flags)
 117 {
 118         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 119         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
 120                 .sta_id = mvm_sta->sta_id,
 121                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
 122                 .add_modify = update ? 1 : 0,
 123                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
 124                                                  STA_FLG_MIMO_EN_MSK),
 125                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 126         };
 127         int ret;
 128         u32 status;
 129         u32 agg_size = 0, mpdu_dens = 0;
 130
 131         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
 132                 add_sta_cmd.station_type = mvm_sta->sta_type;
 133
 134         if (!update || (flags & STA_MODIFY_QUEUES)) {
 135                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 136
 137                 if (!iwl_mvm_has_new_tx_api(mvm)) {
 138                         add_sta_cmd.tfd_queue_msk =
 139                                 cpu_to_le32(mvm_sta->tfd_queue_msk);
 140
 141                         if (flags & STA_MODIFY_QUEUES)
 142                                 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 143                 } else {
 144                         WARN_ON(flags & STA_MODIFY_QUEUES);
 145                 }
 146         }
 147
 148         switch (sta->bandwidth) {
 149         case IEEE80211_STA_RX_BW_160:
 150                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 151                 /* fall through */
 152         case IEEE80211_STA_RX_BW_80:
 153                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 154                 /* fall through */
 155         case IEEE80211_STA_RX_BW_40:
 156                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 157                 /* fall through */
 158         case IEEE80211_STA_RX_BW_20:
 159                 if (sta->ht_cap.ht_supported)
 160                         add_sta_cmd.station_flags |=
 161                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 162                 break;
 163         }
 164
 165         switch (sta->rx_nss) {
 166         case 1:
 167                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 168                 break;
 169         case 2:
 170                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 171                 break;
 172         case 3 ... 8:
 173                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 174                 break;
 175         }
 176
 177         switch (sta->smps_mode) {
 178         case IEEE80211_SMPS_AUTOMATIC:
 179         case IEEE80211_SMPS_NUM_MODES:
 180                 WARN_ON(1);
 181                 break;
 182         case IEEE80211_SMPS_STATIC:
 183                 /* override NSS */
 184                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 185                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 186                 break;
 187         case IEEE80211_SMPS_DYNAMIC:
 188                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 189                 break;
 190         case IEEE80211_SMPS_OFF:
 191                 /* nothing */
 192                 break;
 193         }
 194
 195         if (sta->ht_cap.ht_supported) {
 196                 add_sta_cmd.station_flags_msk |=
 197                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 198                                     STA_FLG_AGG_MPDU_DENS_MSK);
 199
 200                 mpdu_dens = sta->ht_cap.ampdu_density;
 201         }
 202
 203         if (sta->vht_cap.vht_supported) {
 204                 agg_size = sta->vht_cap.cap &
 205                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 206                 agg_size >>=
 207                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 208         } else if (sta->ht_cap.ht_supported) {
 209                 agg_size = sta->ht_cap.ampdu_factor;
 210         }
 211
 212         add_sta_cmd.station_flags |=
 213                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 214         add_sta_cmd.station_flags |=
 215                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 216         if (mvm_sta->associated)
 217                 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 218
 219         if (sta->wme) {
 220                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 221
 222                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 223                         add_sta_cmd.uapsd_acs |= BIT(AC_BK);
 224                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 225                         add_sta_cmd.uapsd_acs |= BIT(AC_BE);
 226                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 227                         add_sta_cmd.uapsd_acs |= BIT(AC_VI);
 228                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 229                         add_sta_cmd.uapsd_acs |= BIT(AC_VO);
 230                 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
 231                 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
 232         }
 233
 234         status = ADD_STA_SUCCESS;
 235         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 236                                           iwl_mvm_add_sta_cmd_size(mvm),
 237                                           &add_sta_cmd, &status);
 238         if (ret)
 239                 return ret;
 240
 241         switch (status & IWL_ADD_STA_STATUS_MASK) {
 242         case ADD_STA_SUCCESS:
 243                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 244                 break;
 245         default:
 246                 ret = -EIO;
 247                 IWL_ERR(mvm, "ADD_STA failed\n");
 248                 break;
 249         }
 250
 251         return ret;
 252 }
 253
 254 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
 255 {
 256         struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
 257         struct iwl_mvm_baid_data *ba_data;
 258         struct ieee80211_sta *sta;
 259         struct iwl_mvm_sta *mvm_sta;
 260         unsigned long timeout;
 261
 262         rcu_read_lock();
 263
 264         ba_data = rcu_dereference(*rcu_ptr);
 265
 266         if (WARN_ON(!ba_data))
 267                 goto unlock;
 268
 269         if (!ba_data->timeout)
 270                 goto unlock;
 271
 272         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 273         if (time_is_after_jiffies(timeout)) {
 274                 mod_timer(&ba_data->session_timer, timeout);
 275                 goto unlock;
 276         }
 277
 278         /* Timer expired */
 279         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 280         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 281         ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
 282                                           sta->addr, ba_data->tid);
 283 unlock:
 284         rcu_read_unlock();
 285 }
 286
 287 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
 288                                  struct ieee80211_sta *sta)
 289 {
 290         unsigned long used_hw_queues;
 291         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 292         unsigned int wdg_timeout =
 293                 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
 294         u32 ac;
 295
 296         lockdep_assert_held(&mvm->mutex);
 297
 298         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
 299
 300         /* Find available queues, and allocate them to the ACs */
 301         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 302                 u8 queue = find_first_zero_bit(&used_hw_queues,
 303                                                mvm->first_agg_queue);
 304
 305                 if (queue >= mvm->first_agg_queue) {
 306                         IWL_ERR(mvm, "Failed to allocate STA queue\n");
 307                         return -EBUSY;
 308                 }
 309
 310                 __set_bit(queue, &used_hw_queues);
 311                 mvmsta->hw_queue[ac] = queue;
 312         }
 313
 314         /* Found a place for all queues - enable them */
 315         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 316                 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
 317                                       mvmsta->hw_queue[ac],
 318                                       iwl_mvm_ac_to_tx_fifo[ac], 0,
 319                                       wdg_timeout);
 320                 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
 321         }
 322
 323         return 0;
 324 }
 325
 326 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
 327                                     struct ieee80211_sta *sta)
 328 {
 329         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 330         unsigned long sta_msk;
 331         int i;
 332
 333         lockdep_assert_held(&mvm->mutex);
 334
 335         /* disable the TDLS STA-specific queues */
 336         sta_msk = mvmsta->tfd_queue_msk;
 337         for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
 338                 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
 339 }
 340
 341 /* Disable aggregations for a bitmap of TIDs for a given station */
 342 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 343                                         unsigned long disable_agg_tids,
 344                                         bool remove_queue)
 345 {
 346         struct iwl_mvm_add_sta_cmd cmd = {};
 347         struct ieee80211_sta *sta;
 348         struct iwl_mvm_sta *mvmsta;
 349         u32 status;
 350         u8 sta_id;
 351         int ret;
 352
 353         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 354                 return -EINVAL;
 355
 356         spin_lock_bh(&mvm->queue_info_lock);
 357         sta_id = mvm->queue_info[queue].ra_sta_id;
 358         spin_unlock_bh(&mvm->queue_info_lock);
 359
 360         rcu_read_lock();
 361
 362         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 363
 364         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 365                 rcu_read_unlock();
 366                 return -EINVAL;
 367         }
 368
 369         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 370
 371         mvmsta->tid_disable_agg |= disable_agg_tids;
 372
 373         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 374         cmd.sta_id = mvmsta->sta_id;
 375         cmd.add_modify = STA_MODE_MODIFY;
 376         cmd.modify_mask = STA_MODIFY_QUEUES;
 377         if (disable_agg_tids)
 378                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 379         if (remove_queue)
 380                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 381         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 382         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 383
 384         rcu_read_unlock();
 385
 386         /* Notify FW of queue removal from the STA queues */
 387         status = ADD_STA_SUCCESS;
 388         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 389                                           iwl_mvm_add_sta_cmd_size(mvm),
 390                                           &cmd, &status);
 391
 392         return ret;
 393 }
 394
 395 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 396 {
 397         struct ieee80211_sta *sta;
 398         struct iwl_mvm_sta *mvmsta;
 399         unsigned long tid_bitmap;
 400         unsigned long agg_tids = 0;
 401         s8 sta_id;
 402         int tid;
 403
 404         lockdep_assert_held(&mvm->mutex);
 405
 406         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 407                 return -EINVAL;
 408
 409         spin_lock_bh(&mvm->queue_info_lock);
 410         sta_id = mvm->queue_info[queue].ra_sta_id;
 411         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 412         spin_unlock_bh(&mvm->queue_info_lock);
 413
 414         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 415                                         lockdep_is_held(&mvm->mutex));
 416
 417         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 418                 return -EINVAL;
 419
 420         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 421
 422         spin_lock_bh(&mvmsta->lock);
 423         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 424                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 425                         agg_tids |= BIT(tid);
 426         }
 427         spin_unlock_bh(&mvmsta->lock);
 428
 429         return agg_tids;
 430 }
 431
 432 /*
 433  * Remove a queue from a station's resources.
 434  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 435  * doesn't disable the queue
 436  */
 437 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 438 {
 439         struct ieee80211_sta *sta;
 440         struct iwl_mvm_sta *mvmsta;
 441         unsigned long tid_bitmap;
 442         unsigned long disable_agg_tids = 0;
 443         u8 sta_id;
 444         int tid;
 445
 446         lockdep_assert_held(&mvm->mutex);
 447
 448         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 449                 return -EINVAL;
 450
 451         spin_lock_bh(&mvm->queue_info_lock);
 452         sta_id = mvm->queue_info[queue].ra_sta_id;
 453         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 454         spin_unlock_bh(&mvm->queue_info_lock);
 455
 456         rcu_read_lock();
 457
 458         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 459
 460         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 461                 rcu_read_unlock();
 462                 return 0;
 463         }
 464
 465         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 466
 467         spin_lock_bh(&mvmsta->lock);
 468         /* Unmap MAC queues and TIDs from this queue */
 469         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 470                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 471                         disable_agg_tids |= BIT(tid);
 472                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
 473         }
 474
 475         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 476         spin_unlock_bh(&mvmsta->lock);
 477
 478         rcu_read_unlock();
 479
 480         return disable_agg_tids;
 481 }
 482
 483 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
 484                                        bool same_sta)
 485 {
 486         struct iwl_mvm_sta *mvmsta;
 487         u8 txq_curr_ac, sta_id, tid;
 488         unsigned long disable_agg_tids = 0;
 489         int ret;
 490
 491         lockdep_assert_held(&mvm->mutex);
 492
 493         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 494                 return -EINVAL;
 495
 496         spin_lock_bh(&mvm->queue_info_lock);
 497         txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
 498         sta_id = mvm->queue_info[queue].ra_sta_id;
 499         tid = mvm->queue_info[queue].txq_tid;
 500         spin_unlock_bh(&mvm->queue_info_lock);
 501
 502         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 503         if (WARN_ON(!mvmsta))
 504                 return -EINVAL;
 505
 506         disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 507         /* Disable the queue */
 508         if (disable_agg_tids)
 509                 iwl_mvm_invalidate_sta_queue(mvm, queue,
 510                                              disable_agg_tids, false);
 511
 512         ret = iwl_mvm_disable_txq(mvm, queue,
 513                                   mvmsta->vif->hw_queue[txq_curr_ac],
 514                                   tid, 0);
 515         if (ret) {
 516                 /* Re-mark the inactive queue as inactive */
 517                 spin_lock_bh(&mvm->queue_info_lock);
 518                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
 519                 spin_unlock_bh(&mvm->queue_info_lock);
 520                 IWL_ERR(mvm,
 521                         "Failed to free inactive queue %d (ret=%d)\n",
 522                         queue, ret);
 523
 524                 return ret;
 525         }
 526
 527         /* If TXQ is allocated to another STA, update removal in FW */
 528         if (!same_sta)
 529                 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 530
 531         return 0;
 532 }
 533
 534 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 535                                     unsigned long tfd_queue_mask, u8 ac)
 536 {
 537         int queue = 0;
 538         u8 ac_to_queue[IEEE80211_NUM_ACS];
 539         int i;
 540
 541         lockdep_assert_held(&mvm->queue_info_lock);
 542         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 543                 return -EINVAL;
 544
 545         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 546
 547         /* See what ACs the existing queues for this STA have */
 548         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 549                 /* Only DATA queues can be shared */
 550                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 551                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 552                         continue;
 553
 554                 /* Don't try and take queues being reconfigured */
 555                 if (mvm->queue_info[queue].status ==
 556                     IWL_MVM_QUEUE_RECONFIGURING)
 557                         continue;
 558
 559                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 560         }
 561
 562         /*
 563          * The queue to share is chosen only from DATA queues as follows (in
 564          * descending priority):
 565          * 1. An AC_BE queue
 566          * 2. Same AC queue
 567          * 3. Highest AC queue that is lower than new AC
 568          * 4. Any existing AC (there always is at least 1 DATA queue)
 569          */
 570
 571         /* Priority 1: An AC_BE queue */
 572         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 573                 queue = ac_to_queue[IEEE80211_AC_BE];
 574         /* Priority 2: Same AC queue */
 575         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 576                 queue = ac_to_queue[ac];
 577         /* Priority 3a: If new AC is VO and VI exists - use VI */
 578         else if (ac == IEEE80211_AC_VO &&
 579                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 580                 queue = ac_to_queue[IEEE80211_AC_VI];
 581         /* Priority 3b: No BE so only AC less than the new one is BK */
 582         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 583                 queue = ac_to_queue[IEEE80211_AC_BK];
 584         /* Priority 4a: No BE nor BK - use VI if exists */
 585         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 586                 queue = ac_to_queue[IEEE80211_AC_VI];
 587         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 588         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 589                 queue = ac_to_queue[IEEE80211_AC_VO];
 590
 591         /* Make sure queue found (or not) is legal */
 592         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 593             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 594             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 595                 IWL_ERR(mvm, "No DATA queues available to share\n");
 596                 return -ENOSPC;
 597         }
 598
 599         /* Make sure the queue isn't in the middle of being reconfigured */
 600         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
 601                 IWL_ERR(mvm,
 602                         "TXQ %d is in the middle of re-config - try again\n",
 603                         queue);
 604                 return -EBUSY;
 605         }
 606
 607         return queue;
 608 }
 609
 610 /*
 611  * If a given queue has a higher AC than the TID stream that is being compared
 612  * to, the queue needs to be redirected to the lower AC. This function does that
 613  * in such a case, otherwise - if no redirection required - it does nothing,
 614  * unless the %force param is true.
 615  */
 616 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
 617                                int ac, int ssn, unsigned int wdg_timeout,
 618                                bool force)
 619 {
 620         struct iwl_scd_txq_cfg_cmd cmd = {
 621                 .scd_queue = queue,
 622                 .action = SCD_CFG_DISABLE_QUEUE,
 623         };
 624         bool shared_queue;
 625         unsigned long mq;
 626         int ret;
 627
 628         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 629                 return -EINVAL;
 630
 631         /*
 632          * If the AC is lower than current one - FIFO needs to be redirected to
 633          * the lowest one of the streams in the queue. Check if this is needed
 634          * here.
 635          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 636          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 637          * we need to check if the numerical value of X is LARGER than of Y.
 638          */
 639         spin_lock_bh(&mvm->queue_info_lock);
 640         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 641                 spin_unlock_bh(&mvm->queue_info_lock);
 642
 643                 IWL_DEBUG_TX_QUEUES(mvm,
 644                                     "No redirection needed on TXQ #%d\n",
 645                                     queue);
 646                 return 0;
 647         }
 648
 649         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 650         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 651         cmd.tid = mvm->queue_info[queue].txq_tid;
 652         mq = mvm->hw_queue_to_mac80211[queue];
 653         shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
 654         spin_unlock_bh(&mvm->queue_info_lock);
 655
 656         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 657                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 658
 659         /* Stop MAC queues and wait for this queue to empty */
 660         iwl_mvm_stop_mac_queues(mvm, mq);
 661         ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
 662         if (ret) {
 663                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 664                         queue);
 665                 ret = -EIO;
 666                 goto out;
 667         }
 668
 669         /* Before redirecting the queue we need to de-activate it */
 670         iwl_trans_txq_disable(mvm->trans, queue, false);
 671         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 672         if (ret)
 673                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 674                         ret);
 675
 676         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 677         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 678
 679         /* Update the TID "owner" of the queue */
 680         spin_lock_bh(&mvm->queue_info_lock);
 681         mvm->queue_info[queue].txq_tid = tid;
 682         spin_unlock_bh(&mvm->queue_info_lock);
 683
 684         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 685
 686         /* Redirect to lower AC */
 687         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 688                              cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
 689                              ssn);
 690
 691         /* Update AC marking of the queue */
 692         spin_lock_bh(&mvm->queue_info_lock);
 693         mvm->queue_info[queue].mac80211_ac = ac;
 694         spin_unlock_bh(&mvm->queue_info_lock);
 695
 696         /*
 697          * Mark queue as shared in transport if shared
 698          * Note this has to be done after queue enablement because enablement
 699          * can also set this value, and there is no indication there to shared
 700          * queues
 701          */
 702         if (shared_queue)
 703                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 704
 705 out:
 706         /* Continue using the MAC queues */
 707         iwl_mvm_start_mac_queues(mvm, mq);
 708
 709         return ret;
 710 }
 711
 712 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
 713                                         struct ieee80211_sta *sta, u8 ac,
 714                                         int tid)
 715 {
 716         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 717         unsigned int wdg_timeout =
 718                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 719         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 720         int queue = -1;
 721
 722         lockdep_assert_held(&mvm->mutex);
 723
 724         IWL_DEBUG_TX_QUEUES(mvm,
 725                             "Allocating queue for sta %d on tid %d\n",
 726                             mvmsta->sta_id, tid);
 727         queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
 728                                         wdg_timeout);
 729         if (queue < 0)
 730                 return queue;
 731
 732         IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
 733
 734         spin_lock_bh(&mvmsta->lock);
 735         mvmsta->tid_data[tid].txq_id = queue;
 736         mvmsta->tid_data[tid].is_tid_active = true;
 737         mvmsta->tfd_queue_msk |= BIT(queue);
 738         spin_unlock_bh(&mvmsta->lock);
 739
 740         return 0;
 741 }
 742
 743 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
 744                                    struct ieee80211_sta *sta, u8 ac, int tid,
 745                                    struct ieee80211_hdr *hdr)
 746 {
 747         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 748         struct iwl_trans_txq_scd_cfg cfg = {
 749                 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
 750                 .sta_id = mvmsta->sta_id,
 751                 .tid = tid,
 752                 .frame_limit = IWL_FRAME_LIMIT,
 753         };
 754         unsigned int wdg_timeout =
 755                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 756         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 757         int queue = -1;
 758         bool using_inactive_queue = false, same_sta = false;
 759         unsigned long disable_agg_tids = 0;
 760         enum iwl_mvm_agg_state queue_state;
 761         bool shared_queue = false;
 762         int ssn;
 763         unsigned long tfd_queue_mask;
 764         int ret;
 765
 766         lockdep_assert_held(&mvm->mutex);
 767
 768         if (iwl_mvm_has_new_tx_api(mvm))
 769                 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
 770
 771         spin_lock_bh(&mvmsta->lock);
 772         tfd_queue_mask = mvmsta->tfd_queue_msk;
 773         spin_unlock_bh(&mvmsta->lock);
 774
 775         spin_lock_bh(&mvm->queue_info_lock);
 776
 777         /*
 778          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
 779          * exists
 780          */
 781         if (!ieee80211_is_data_qos(hdr->frame_control) ||
 782             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 783                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 784                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
 785                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
 786                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
 787                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
 788                                             queue);
 789
 790                 /* If no such queue is found, we'll use a DATA queue instead */
 791         }
 792
 793         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
 794             (mvm->queue_info[mvmsta->reserved_queue].status ==
 795              IWL_MVM_QUEUE_RESERVED ||
 796              mvm->queue_info[mvmsta->reserved_queue].status ==
 797              IWL_MVM_QUEUE_INACTIVE)) {
 798                 queue = mvmsta->reserved_queue;
 799                 mvm->queue_info[queue].reserved = true;
 800                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
 801         }
 802
 803         if (queue < 0)
 804                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 805                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
 806                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 807
 808         /*
 809          * Check if this queue is already allocated but inactive.
 810          * In such a case, we'll need to first free this queue before enabling
 811          * it again, so we'll mark it as reserved to make sure no new traffic
 812          * arrives on it
 813          */
 814         if (queue > 0 &&
 815             mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
 816                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
 817                 using_inactive_queue = true;
 818                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
 819                 IWL_DEBUG_TX_QUEUES(mvm,
 820                                     "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
 821                                     queue, mvmsta->sta_id, tid);
 822         }
 823
 824         /* No free queue - we'll have to share */
 825         if (queue <= 0) {
 826                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
 827                 if (queue > 0) {
 828                         shared_queue = true;
 829                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
 830                 }
 831         }
 832
 833         /*
 834          * Mark TXQ as ready, even though it hasn't been fully configured yet,
 835          * to make sure no one else takes it.
 836          * This will allow avoiding re-acquiring the lock at the end of the
 837          * configuration. On error we'll mark it back as free.
 838          */
 839         if ((queue > 0) && !shared_queue)
 840                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 841
 842         spin_unlock_bh(&mvm->queue_info_lock);
 843
 844         /* This shouldn't happen - out of queues */
 845         if (WARN_ON(queue <= 0)) {
 846                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
 847                         tid, cfg.sta_id);
 848                 return queue;
 849         }
 850
 851         /*
 852          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
 853          * but for configuring the SCD to send A-MPDUs we need to mark the queue
 854          * as aggregatable.
 855          * Mark all DATA queues as allowing to be aggregated at some point
 856          */
 857         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 858                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
 859
 860         /*
 861          * If this queue was previously inactive (idle) - we need to free it
 862          * first
 863          */
 864         if (using_inactive_queue) {
 865                 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
 866                 if (ret)
 867                         return ret;
 868         }
 869
 870         IWL_DEBUG_TX_QUEUES(mvm,
 871                             "Allocating %squeue #%d to sta %d on tid %d\n",
 872                             shared_queue ? "shared " : "", queue,
 873                             mvmsta->sta_id, tid);
 874
 875         if (shared_queue) {
 876                 /* Disable any open aggs on this queue */
 877                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
 878
 879                 if (disable_agg_tids) {
 880                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
 881                                             queue);
 882                         iwl_mvm_invalidate_sta_queue(mvm, queue,
 883                                                      disable_agg_tids, false);
 884                 }
 885         }
 886
 887         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 888         iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
 889                            wdg_timeout);
 890
 891         /*
 892          * Mark queue as shared in transport if shared
 893          * Note this has to be done after queue enablement because enablement
 894          * can also set this value, and there is no indication there to shared
 895          * queues
 896          */
 897         if (shared_queue)
 898                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 899
 900         spin_lock_bh(&mvmsta->lock);
 901         mvmsta->tid_data[tid].txq_id = queue;
 902         mvmsta->tid_data[tid].is_tid_active = true;
 903         mvmsta->tfd_queue_msk |= BIT(queue);
 904         queue_state = mvmsta->tid_data[tid].state;
 905
 906         if (mvmsta->reserved_queue == queue)
 907                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
 908         spin_unlock_bh(&mvmsta->lock);
 909
 910         if (!shared_queue) {
 911                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
 912                 if (ret)
 913                         goto out_err;
 914
 915                 /* If we need to re-enable aggregations... */
 916                 if (queue_state == IWL_AGG_ON) {
 917                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
 918                         if (ret)
 919                                 goto out_err;
 920                 }
 921         } else {
 922                 /* Redirect queue, if needed */
 923                 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
 924                                                  wdg_timeout, false);
 925                 if (ret)
 926                         goto out_err;
 927         }
 928
 929         return 0;
 930
 931 out_err:
 932         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
 933
 934         return ret;
 935 }
 936
 937 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
 938 {
 939         struct iwl_scd_txq_cfg_cmd cmd = {
 940                 .scd_queue = queue,
 941                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 942         };
 943         int tid;
 944         unsigned long tid_bitmap;
 945         int ret;
 946
 947         lockdep_assert_held(&mvm->mutex);
 948
 949         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 950                 return;
 951
 952         spin_lock_bh(&mvm->queue_info_lock);
 953         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 954         spin_unlock_bh(&mvm->queue_info_lock);
 955
 956         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 957                 return;
 958
 959         /* Find any TID for queue */
 960         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 961         cmd.tid = tid;
 962         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 963
 964         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 965         if (ret) {
 966                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 967                         queue, ret);
 968                 return;
 969         }
 970
 971         spin_lock_bh(&mvm->queue_info_lock);
 972         mvm->queue_info[queue].txq_tid = tid;
 973         spin_unlock_bh(&mvm->queue_info_lock);
 974         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 975                             queue, tid);
 976 }
 977
 978 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
 979 {
 980         struct ieee80211_sta *sta;
 981         struct iwl_mvm_sta *mvmsta;
 982         s8 sta_id;
 983         int tid = -1;
 984         unsigned long tid_bitmap;
 985         unsigned int wdg_timeout;
 986         int ssn;
 987         int ret = true;
 988
 989         /* queue sharing is disabled on new TX path */
 990         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 991                 return;
 992
 993         lockdep_assert_held(&mvm->mutex);
 994
 995         spin_lock_bh(&mvm->queue_info_lock);
 996         sta_id = mvm->queue_info[queue].ra_sta_id;
 997         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 998         spin_unlock_bh(&mvm->queue_info_lock);
 999
1000         /* Find TID for queue, and make sure it is the only one on the queue */
1001         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1002         if (tid_bitmap != BIT(tid)) {
1003                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1004                         queue, tid_bitmap);
1005                 return;
1006         }
1007
1008         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1009                             tid);
1010
1011         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1012                                         lockdep_is_held(&mvm->mutex));
1013
1014         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1015                 return;
1016
1017         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1018         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1019
1020         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1021
1022         ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
1023                                          tid_to_mac80211_ac[tid], ssn,
1024                                          wdg_timeout, true);
1025         if (ret) {
1026                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1027                 return;
1028         }
1029
1030         /* If aggs should be turned back on - do it */
1031         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1032                 struct iwl_mvm_add_sta_cmd cmd = {0};
1033
1034                 mvmsta->tid_disable_agg &= ~BIT(tid);
1035
1036                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1037                 cmd.sta_id = mvmsta->sta_id;
1038                 cmd.add_modify = STA_MODE_MODIFY;
1039                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1040                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1041                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1042
1043                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1044                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1045                 if (!ret) {
1046                         IWL_DEBUG_TX_QUEUES(mvm,
1047                                             "TXQ #%d is now aggregated again\n",
1048                                             queue);
1049
1050                         /* Mark queue intenally as aggregating again */
1051                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1052                 }
1053         }
1054
1055         spin_lock_bh(&mvm->queue_info_lock);
1056         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1057         spin_unlock_bh(&mvm->queue_info_lock);
1058 }
1059
1060 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1061 {
1062         if (tid == IWL_MAX_TID_COUNT)
1063                 return IEEE80211_AC_VO; /* MGMT */
1064
1065         return tid_to_mac80211_ac[tid];
1066 }
1067
1068 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1069                                        struct ieee80211_sta *sta, int tid)
1070 {
1071         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1072         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1073         struct sk_buff *skb;
1074         struct ieee80211_hdr *hdr;
1075         struct sk_buff_head deferred_tx;
1076         u8 mac_queue;
1077         bool no_queue = false; /* Marks if there is a problem with the queue */
1078         u8 ac;
1079
1080         lockdep_assert_held(&mvm->mutex);
1081
1082         skb = skb_peek(&tid_data->deferred_tx_frames);
1083         if (!skb)
1084                 return;
1085         hdr = (void *)skb->data;
1086
1087         ac = iwl_mvm_tid_to_ac_queue(tid);
1088         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1089
1090         if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1091             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1092                 IWL_ERR(mvm,
1093                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1094                         mvmsta->sta_id, tid);
1095
1096                 /*
1097                  * Mark queue as problematic so later the deferred traffic is
1098                  * freed, as we can do nothing with it
1099                  */
1100                 no_queue = true;
1101         }
1102
1103         __skb_queue_head_init(&deferred_tx);
1104
1105         /* Disable bottom-halves when entering TX path */
1106         local_bh_disable();
1107         spin_lock(&mvmsta->lock);
1108         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1109         mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1110         spin_unlock(&mvmsta->lock);
1111
1112         while ((skb = __skb_dequeue(&deferred_tx)))
1113                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1114                         ieee80211_free_txskb(mvm->hw, skb);
1115         local_bh_enable();
1116
1117         /* Wake queue */
1118         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1119 }
1120
1121 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1122 {
1123         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1124                                            add_stream_wk);
1125         struct ieee80211_sta *sta;
1126         struct iwl_mvm_sta *mvmsta;
1127         unsigned long deferred_tid_traffic;
1128         int queue, sta_id, tid;
1129
1130         /* Check inactivity of queues */
1131         iwl_mvm_inactivity_check(mvm);
1132
1133         mutex_lock(&mvm->mutex);
1134
1135         /* No queue reconfiguration in TVQM mode */
1136         if (iwl_mvm_has_new_tx_api(mvm))
1137                 goto alloc_queues;
1138
1139         /* Reconfigure queues requiring reconfiguation */
1140         for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1141                 bool reconfig;
1142                 bool change_owner;
1143
1144                 spin_lock_bh(&mvm->queue_info_lock);
1145                 reconfig = (mvm->queue_info[queue].status ==
1146                             IWL_MVM_QUEUE_RECONFIGURING);
1147
1148                 /*
1149                  * We need to take into account a situation in which a TXQ was
1150                  * allocated to TID x, and then turned shared by adding TIDs y
1151                  * and z. If TID x becomes inactive and is removed from the TXQ,
1152                  * ownership must be given to one of the remaining TIDs.
1153                  * This is mainly because if TID x continues - a new queue can't
1154                  * be allocated for it as long as it is an owner of another TXQ.
1155                  */
1156                 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1157                                  BIT(mvm->queue_info[queue].txq_tid)) &&
1158                                (mvm->queue_info[queue].status ==
1159                                 IWL_MVM_QUEUE_SHARED);
1160                 spin_unlock_bh(&mvm->queue_info_lock);
1161
1162                 if (reconfig)
1163                         iwl_mvm_unshare_queue(mvm, queue);
1164                 else if (change_owner)
1165                         iwl_mvm_change_queue_owner(mvm, queue);
1166         }
1167
1168 alloc_queues:
1169         /* Go over all stations with deferred traffic */
1170         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1171                          IWL_MVM_STATION_COUNT) {
1172                 clear_bit(sta_id, mvm->sta_deferred_frames);
1173                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1174                                                 lockdep_is_held(&mvm->mutex));
1175                 if (IS_ERR_OR_NULL(sta))
1176                         continue;
1177
1178                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1179                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1180
1181                 for_each_set_bit(tid, &deferred_tid_traffic,
1182                                  IWL_MAX_TID_COUNT + 1)
1183                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1184         }
1185
1186         mutex_unlock(&mvm->mutex);
1187 }
1188
1189 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1190                                       struct ieee80211_sta *sta,
1191                                       enum nl80211_iftype vif_type)
1192 {
1193         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1194         int queue;
1195         bool using_inactive_queue = false, same_sta = false;
1196
1197         /* queue reserving is disabled on new TX path */
1198         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1199                 return 0;
1200
1201         /*
1202          * Check for inactive queues, so we don't reach a situation where we
1203          * can't add a STA due to a shortage in queues that doesn't really exist
1204          */
1205         iwl_mvm_inactivity_check(mvm);
1206
1207         spin_lock_bh(&mvm->queue_info_lock);
1208
1209         /* Make sure we have free resources for this STA */
1210         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1211             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1212             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1213              IWL_MVM_QUEUE_FREE))
1214                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1215         else
1216                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1217                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1218                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1219         if (queue < 0) {
1220                 spin_unlock_bh(&mvm->queue_info_lock);
1221                 IWL_ERR(mvm, "No available queues for new station\n");
1222                 return -ENOSPC;
1223         } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1224                 /*
1225                  * If this queue is already allocated but inactive we'll need to
1226                  * first free this queue before enabling it again, we'll mark
1227                  * it as reserved to make sure no new traffic arrives on it
1228                  */
1229                 using_inactive_queue = true;
1230                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1231         }
1232         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1233
1234         spin_unlock_bh(&mvm->queue_info_lock);
1235
1236         mvmsta->reserved_queue = queue;
1237
1238         if (using_inactive_queue)
1239                 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1240
1241         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1242                             queue, mvmsta->sta_id);
1243
1244         return 0;
1245 }
1246
1247 /*
1248  * In DQA mode, after a HW restart the queues should be allocated as before, in
1249  * order to avoid race conditions when there are shared queues. This function
1250  * does the re-mapping and queue allocation.
1251  *
1252  * Note that re-enabling aggregations isn't done in this function.
1253  */
1254 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1255                                                  struct iwl_mvm_sta *mvm_sta)
1256 {
1257         unsigned int wdg_timeout =
1258                         iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1259         int i;
1260         struct iwl_trans_txq_scd_cfg cfg = {
1261                 .sta_id = mvm_sta->sta_id,
1262                 .frame_limit = IWL_FRAME_LIMIT,
1263         };
1264
1265         /* Make sure reserved queue is still marked as such (if allocated) */
1266         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1267                 mvm->queue_info[mvm_sta->reserved_queue].status =
1268                         IWL_MVM_QUEUE_RESERVED;
1269
1270         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1271                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1272                 int txq_id = tid_data->txq_id;
1273                 int ac;
1274                 u8 mac_queue;
1275
1276                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1277                         continue;
1278
1279                 skb_queue_head_init(&tid_data->deferred_tx_frames);
1280
1281                 ac = tid_to_mac80211_ac[i];
1282                 mac_queue = mvm_sta->vif->hw_queue[ac];
1283
1284                 if (iwl_mvm_has_new_tx_api(mvm)) {
1285                         IWL_DEBUG_TX_QUEUES(mvm,
1286                                             "Re-mapping sta %d tid %d\n",
1287                                             mvm_sta->sta_id, i);
1288                         txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1289                                                          mvm_sta->sta_id,
1290                                                          i, wdg_timeout);
1291                         tid_data->txq_id = txq_id;
1292                 } else {
1293                         u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1294
1295                         cfg.tid = i;
1296                         cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
1297                         cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1298                                          txq_id ==
1299                                          IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1300
1301                         IWL_DEBUG_TX_QUEUES(mvm,
1302                                             "Re-mapping sta %d tid %d to queue %d\n",
1303                                             mvm_sta->sta_id, i, txq_id);
1304
1305                         iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1306                                            wdg_timeout);
1307                         mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1308                 }
1309         }
1310
1311         atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
1312 }
1313
1314 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1315                     struct ieee80211_vif *vif,
1316                     struct ieee80211_sta *sta)
1317 {
1318         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1319         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1320         struct iwl_mvm_rxq_dup_data *dup_data;
1321         int i, ret, sta_id;
1322
1323         lockdep_assert_held(&mvm->mutex);
1324
1325         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1326                 sta_id = iwl_mvm_find_free_sta_id(mvm,
1327                                                   ieee80211_vif_type_p2p(vif));
1328         else
1329                 sta_id = mvm_sta->sta_id;
1330
1331         if (sta_id == IWL_MVM_INVALID_STA)
1332                 return -ENOSPC;
1333
1334         spin_lock_init(&mvm_sta->lock);
1335
1336         /* In DQA mode, if this is a HW restart, re-alloc existing queues */
1337         if (iwl_mvm_is_dqa_supported(mvm) &&
1338             test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1339                 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1340                 goto update_fw;
1341         }
1342
1343         mvm_sta->sta_id = sta_id;
1344         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1345                                                       mvmvif->color);
1346         mvm_sta->vif = vif;
1347         mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1348         mvm_sta->tx_protection = 0;
1349         mvm_sta->tt_tx_protection = false;
1350         mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1351
1352         /* HW restart, don't assume the memory has been zeroed */
1353         atomic_set(&mvm->pending_frames[sta_id], 0);
1354         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1355         mvm_sta->tfd_queue_msk = 0;
1356
1357         /*
1358          * Allocate new queues for a TDLS station, unless we're in DQA mode,
1359          * and then they'll be allocated dynamically
1360          */
1361         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1362                 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1363                 if (ret)
1364                         return ret;
1365         } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1366                 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1367                         if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1368                                 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1369         }
1370
1371         /* for HW restart - reset everything but the sequence number */
1372         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1373                 u16 seq = mvm_sta->tid_data[i].seq_number;
1374                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1375                 mvm_sta->tid_data[i].seq_number = seq;
1376
1377                 if (!iwl_mvm_is_dqa_supported(mvm))
1378                         continue;
1379
1380                 /*
1381                  * Mark all queues for this STA as unallocated and defer TX
1382                  * frames until the queue is allocated
1383                  */
1384                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1385                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1386         }
1387         mvm_sta->deferred_traffic_tid_map = 0;
1388         mvm_sta->agg_tids = 0;
1389
1390         if (iwl_mvm_has_new_rx_api(mvm) &&
1391             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1392                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1393                                    sizeof(*dup_data),
1394                                    GFP_KERNEL);
1395                 if (!dup_data)
1396                         return -ENOMEM;
1397                 mvm_sta->dup_data = dup_data;
1398         }
1399
1400         if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1401                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1402                                                  ieee80211_vif_type_p2p(vif));
1403                 if (ret)
1404                         goto err;
1405         }
1406
1407 update_fw:
1408         ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1409         if (ret)
1410                 goto err;
1411
1412         if (vif->type == NL80211_IFTYPE_STATION) {
1413                 if (!sta->tdls) {
1414                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1415                         mvmvif->ap_sta_id = sta_id;
1416                 } else {
1417                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1418                 }
1419         }
1420
1421         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1422
1423         return 0;
1424
1425 err:
1426         if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1427                 iwl_mvm_tdls_sta_deinit(mvm, sta);
1428         return ret;
1429 }
1430
1431 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1432                       bool drain)
1433 {
1434         struct iwl_mvm_add_sta_cmd cmd = {};
1435         int ret;
1436         u32 status;
1437
1438         lockdep_assert_held(&mvm->mutex);
1439
1440         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1441         cmd.sta_id = mvmsta->sta_id;
1442         cmd.add_modify = STA_MODE_MODIFY;
1443         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1444         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1445
1446         status = ADD_STA_SUCCESS;
1447         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1448                                           iwl_mvm_add_sta_cmd_size(mvm),
1449                                           &cmd, &status);
1450         if (ret)
1451                 return ret;
1452
1453         switch (status & IWL_ADD_STA_STATUS_MASK) {
1454         case ADD_STA_SUCCESS:
1455                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1456                                mvmsta->sta_id);
1457                 break;
1458         default:
1459                 ret = -EIO;
1460                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1461                         mvmsta->sta_id);
1462                 break;
1463         }
1464
1465         return ret;
1466 }
1467
1468 /*
1469  * Remove a station from the FW table. Before sending the command to remove
1470  * the station validate that the station is indeed known to the driver (sanity
1471  * only).
1472  */
1473 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1474 {
1475         struct ieee80211_sta *sta;
1476         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1477                 .sta_id = sta_id,
1478         };
1479         int ret;
1480
1481         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1482                                         lockdep_is_held(&mvm->mutex));
1483
1484         /* Note: internal stations are marked as error values */
1485         if (!sta) {
1486                 IWL_ERR(mvm, "Invalid station id\n");
1487                 return -EINVAL;
1488         }
1489
1490         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1491                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1492         if (ret) {
1493                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1494                 return ret;
1495         }
1496
1497         return 0;
1498 }
1499
1500 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1501 {
1502         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1503         u8 sta_id;
1504
1505         /*
1506          * The mutex is needed because of the SYNC cmd, but not only: if the
1507          * work would run concurrently with iwl_mvm_rm_sta, it would run before
1508          * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1509          * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1510          * that later.
1511          */
1512         mutex_lock(&mvm->mutex);
1513
1514         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1515                 int ret;
1516                 struct ieee80211_sta *sta =
1517                         rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1518                                                   lockdep_is_held(&mvm->mutex));
1519
1520                 /*
1521                  * This station is in use or RCU-removed; the latter happens in
1522                  * managed mode, where mac80211 removes the station before we
1523                  * can remove it from firmware (we can only do that after the
1524                  * MAC is marked unassociated), and possibly while the deauth
1525                  * frame to disconnect from the AP is still queued. Then, the
1526                  * station pointer is -ENOENT when the last skb is reclaimed.
1527                  */
1528                 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1529                         continue;
1530
1531                 if (PTR_ERR(sta) == -EINVAL) {
1532                         IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1533                                 sta_id);
1534                         continue;
1535                 }
1536
1537                 if (!sta) {
1538                         IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1539                                 sta_id);
1540                         continue;
1541                 }
1542
1543                 WARN_ON(PTR_ERR(sta) != -EBUSY);
1544                 /* This station was removed and we waited until it got drained,
1545                  * we can now proceed and remove it.
1546                  */
1547                 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1548                 if (ret) {
1549                         IWL_ERR(mvm,
1550                                 "Couldn't remove sta %d after it was drained\n",
1551                                 sta_id);
1552                         continue;
1553                 }
1554                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1555                 clear_bit(sta_id, mvm->sta_drained);
1556
1557                 if (mvm->tfd_drained[sta_id]) {
1558                         unsigned long i, msk = mvm->tfd_drained[sta_id];
1559
1560                         for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1561                                 iwl_mvm_disable_txq(mvm, i, i,
1562                                                     IWL_MAX_TID_COUNT, 0);
1563
1564                         mvm->tfd_drained[sta_id] = 0;
1565                         IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1566                                        sta_id, msk);
1567                 }
1568         }
1569
1570         mutex_unlock(&mvm->mutex);
1571 }
1572
1573 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1574                                        struct ieee80211_vif *vif,
1575                                        struct iwl_mvm_sta *mvm_sta)
1576 {
1577         int ac;
1578         int i;
1579
1580         lockdep_assert_held(&mvm->mutex);
1581
1582         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1583                 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1584                         continue;
1585
1586                 ac = iwl_mvm_tid_to_ac_queue(i);
1587                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1588                                     vif->hw_queue[ac], i, 0);
1589                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1590         }
1591 }
1592
1593 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1594                    struct ieee80211_vif *vif,
1595                    struct ieee80211_sta *sta)
1596 {
1597         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1598         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1599         u8 sta_id = mvm_sta->sta_id;
1600         int ret;
1601
1602         lockdep_assert_held(&mvm->mutex);
1603
1604         if (iwl_mvm_has_new_rx_api(mvm))
1605                 kfree(mvm_sta->dup_data);
1606
1607         if ((vif->type == NL80211_IFTYPE_STATION &&
1608              mvmvif->ap_sta_id == sta_id) ||
1609             iwl_mvm_is_dqa_supported(mvm)){
1610                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1611                 if (ret)
1612                         return ret;
1613                 /* flush its queues here since we are freeing mvm_sta */
1614                 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1615                 if (ret)
1616                         return ret;
1617                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1618                                                      mvm_sta->tfd_queue_msk);
1619                 if (ret)
1620                         return ret;
1621                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1622
1623                 /* If DQA is supported - the queues can be disabled now */
1624                 if (iwl_mvm_is_dqa_supported(mvm)) {
1625                         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1626                         /*
1627                          * If pending_frames is set at this point - it must be
1628                          * driver internal logic error, since queues are empty
1629                          * and removed successuly.
1630                          * warn on it but set it to 0 anyway to avoid station
1631                          * not being removed later in the function
1632                          */
1633                         WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0));
1634                 }
1635
1636                 /* If there is a TXQ still marked as reserved - free it */
1637                 if (iwl_mvm_is_dqa_supported(mvm) &&
1638                     mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1639                         u8 reserved_txq = mvm_sta->reserved_queue;
1640                         enum iwl_mvm_queue_status *status;
1641
1642                         /*
1643                          * If no traffic has gone through the reserved TXQ - it
1644                          * is still marked as IWL_MVM_QUEUE_RESERVED, and
1645                          * should be manually marked as free again
1646                          */
1647                         spin_lock_bh(&mvm->queue_info_lock);
1648                         status = &mvm->queue_info[reserved_txq].status;
1649                         if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1650                                  (*status != IWL_MVM_QUEUE_FREE),
1651                                  "sta_id %d reserved txq %d status %d",
1652                                  sta_id, reserved_txq, *status)) {
1653                                 spin_unlock_bh(&mvm->queue_info_lock);
1654                                 return -EINVAL;
1655                         }
1656
1657                         *status = IWL_MVM_QUEUE_FREE;
1658                         spin_unlock_bh(&mvm->queue_info_lock);
1659                 }
1660
1661                 if (vif->type == NL80211_IFTYPE_STATION &&
1662                     mvmvif->ap_sta_id == sta_id) {
1663                         /* if associated - we can't remove the AP STA now */
1664                         if (vif->bss_conf.assoc)
1665                                 return ret;
1666
1667                         /* unassoc - go ahead - remove the AP STA now */
1668                         mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1669
1670                         /* clear d0i3_ap_sta_id if no longer relevant */
1671                         if (mvm->d0i3_ap_sta_id == sta_id)
1672                                 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1673                 }
1674         }
1675
1676         /*
1677          * This shouldn't happen - the TDLS channel switch should be canceled
1678          * before the STA is removed.
1679          */
1680         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1681                 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1682                 cancel_delayed_work(&mvm->tdls_cs.dwork);
1683         }
1684
1685         /*
1686          * Make sure that the tx response code sees the station as -EBUSY and
1687          * calls the drain worker.
1688          */
1689         spin_lock_bh(&mvm_sta->lock);
1690
1691         /*
1692          * There are frames pending on the AC queues for this station.
1693          * We need to wait until all the frames are drained...
1694          */
1695         if (atomic_read(&mvm->pending_frames[sta_id])) {
1696                 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id],
1697                                    ERR_PTR(-EBUSY));
1698                 spin_unlock_bh(&mvm_sta->lock);
1699
1700                 /* disable TDLS sta queues on drain complete */
1701                 if (sta->tdls) {
1702                         mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk;
1703                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id);
1704                 }
1705
1706                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1707         } else {
1708                 spin_unlock_bh(&mvm_sta->lock);
1709
1710                 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1711                         iwl_mvm_tdls_sta_deinit(mvm, sta);
1712
1713                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1714                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1715         }
1716
1717         return ret;
1718 }
1719
1720 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1721                       struct ieee80211_vif *vif,
1722                       u8 sta_id)
1723 {
1724         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1725
1726         lockdep_assert_held(&mvm->mutex);
1727
1728         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1729         return ret;
1730 }
1731
1732 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1733                              struct iwl_mvm_int_sta *sta,
1734                              u32 qmask, enum nl80211_iftype iftype,
1735                              enum iwl_sta_type type)
1736 {
1737         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1738                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1739                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1740                         return -ENOSPC;
1741         }
1742
1743         sta->tfd_queue_msk = qmask;
1744         sta->type = type;
1745
1746         /* put a non-NULL value so iterating over the stations won't stop */
1747         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1748         return 0;
1749 }
1750
1751 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1752 {
1753         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1754         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1755         sta->sta_id = IWL_MVM_INVALID_STA;
1756 }
1757
1758 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1759                                       struct iwl_mvm_int_sta *sta,
1760                                       const u8 *addr,
1761                                       u16 mac_id, u16 color)
1762 {
1763         struct iwl_mvm_add_sta_cmd cmd;
1764         int ret;
1765         u32 status;
1766
1767         lockdep_assert_held(&mvm->mutex);
1768
1769         memset(&cmd, 0, sizeof(cmd));
1770         cmd.sta_id = sta->sta_id;
1771         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1772                                                              color));
1773         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1774                 cmd.station_type = sta->type;
1775
1776         if (!iwl_mvm_has_new_tx_api(mvm))
1777                 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1778         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1779
1780         if (addr)
1781                 memcpy(cmd.addr, addr, ETH_ALEN);
1782
1783         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1784                                           iwl_mvm_add_sta_cmd_size(mvm),
1785                                           &cmd, &status);
1786         if (ret)
1787                 return ret;
1788
1789         switch (status & IWL_ADD_STA_STATUS_MASK) {
1790         case ADD_STA_SUCCESS:
1791                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1792                 return 0;
1793         default:
1794                 ret = -EIO;
1795                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1796                         status);
1797                 break;
1798         }
1799         return ret;
1800 }
1801
1802 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm)
1803 {
1804         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1805                                         mvm->cfg->base_params->wd_timeout :
1806                                         IWL_WATCHDOG_DISABLED;
1807
1808         if (iwl_mvm_has_new_tx_api(mvm)) {
1809                 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue,
1810                                                     mvm->aux_sta.sta_id,
1811                                                     IWL_MAX_TID_COUNT,
1812                                                     wdg_timeout);
1813                 mvm->aux_queue = queue;
1814         } else if (iwl_mvm_is_dqa_supported(mvm)) {
1815                 struct iwl_trans_txq_scd_cfg cfg = {
1816                         .fifo = IWL_MVM_TX_FIFO_MCAST,
1817                         .sta_id = mvm->aux_sta.sta_id,
1818                         .tid = IWL_MAX_TID_COUNT,
1819                         .aggregate = false,
1820                         .frame_limit = IWL_FRAME_LIMIT,
1821                 };
1822
1823                 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1824                                    wdg_timeout);
1825         } else {
1826                 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1827                                       IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1828         }
1829 }
1830
1831 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1832 {
1833         int ret;
1834
1835         lockdep_assert_held(&mvm->mutex);
1836
1837         /* Allocate aux station and assign to it the aux queue */
1838         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1839                                        NL80211_IFTYPE_UNSPECIFIED,
1840                                        IWL_STA_AUX_ACTIVITY);
1841         if (ret)
1842                 return ret;
1843
1844         /* Map Aux queue to fifo - needs to happen before adding Aux station */
1845         if (!iwl_mvm_has_new_tx_api(mvm))
1846                 iwl_mvm_enable_aux_queue(mvm);
1847
1848         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1849                                          MAC_INDEX_AUX, 0);
1850         if (ret) {
1851                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1852                 return ret;
1853         }
1854
1855         /*
1856          * For a000 firmware and on we cannot add queue to a station unknown
1857          * to firmware so enable queue here - after the station was added
1858          */
1859         if (iwl_mvm_has_new_tx_api(mvm))
1860                 iwl_mvm_enable_aux_queue(mvm);
1861
1862         return 0;
1863 }
1864
1865 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1866 {
1867         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1868
1869         lockdep_assert_held(&mvm->mutex);
1870         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1871                                          mvmvif->id, 0);
1872 }
1873
1874 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1875 {
1876         int ret;
1877
1878         lockdep_assert_held(&mvm->mutex);
1879
1880         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1881         if (ret)
1882                 IWL_WARN(mvm, "Failed sending remove station\n");
1883
1884         return ret;
1885 }
1886
1887 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1888 {
1889         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1890 }
1891
1892 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1893 {
1894         lockdep_assert_held(&mvm->mutex);
1895
1896         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1897 }
1898
1899 /*
1900  * Send the add station command for the vif's broadcast station.
1901  * Assumes that the station was already allocated.
1902  *
1903  * @mvm: the mvm component
1904  * @vif: the interface to which the broadcast station is added
1905  * @bsta: the broadcast station to add.
1906  */
1907 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1908 {
1909         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1910         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1911         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1912         const u8 *baddr = _baddr;
1913         int queue;
1914         int ret;
1915         unsigned int wdg_timeout =
1916                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1917         struct iwl_trans_txq_scd_cfg cfg = {
1918                 .fifo = IWL_MVM_TX_FIFO_VO,
1919                 .sta_id = mvmvif->bcast_sta.sta_id,
1920                 .tid = IWL_MAX_TID_COUNT,
1921                 .aggregate = false,
1922                 .frame_limit = IWL_FRAME_LIMIT,
1923         };
1924
1925         lockdep_assert_held(&mvm->mutex);
1926
1927         if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1928                 if (vif->type == NL80211_IFTYPE_AP ||
1929                     vif->type == NL80211_IFTYPE_ADHOC)
1930                         queue = mvm->probe_queue;
1931                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1932                         queue = mvm->p2p_dev_queue;
1933                 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1934                         return -EINVAL;
1935
1936                 bsta->tfd_queue_msk |= BIT(queue);
1937
1938                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1939                                    &cfg, wdg_timeout);
1940         }
1941
1942         if (vif->type == NL80211_IFTYPE_ADHOC)
1943                 baddr = vif->bss_conf.bssid;
1944
1945         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1946                 return -ENOSPC;
1947
1948         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1949                                          mvmvif->id, mvmvif->color);
1950         if (ret)
1951                 return ret;
1952
1953         /*
1954          * For a000 firmware and on we cannot add queue to a station unknown
1955          * to firmware so enable queue here - after the station was added
1956          */
1957         if (iwl_mvm_has_new_tx_api(mvm)) {
1958                 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1959                                                 bsta->sta_id,
1960                                                 IWL_MAX_TID_COUNT,
1961                                                 wdg_timeout);
1962
1963                 if (vif->type == NL80211_IFTYPE_AP)
1964                         mvm->probe_queue = queue;
1965                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1966                         mvm->p2p_dev_queue = queue;
1967
1968                 bsta->tfd_queue_msk |= BIT(queue);
1969         }
1970
1971         return 0;
1972 }
1973
1974 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1975                                           struct ieee80211_vif *vif)
1976 {
1977         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1978
1979         lockdep_assert_held(&mvm->mutex);
1980
1981         if (vif->type == NL80211_IFTYPE_AP ||
1982             vif->type == NL80211_IFTYPE_ADHOC)
1983                 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue,
1984                                     IWL_MAX_TID_COUNT, 0);
1985
1986         if (mvmvif->bcast_sta.tfd_queue_msk & BIT(mvm->probe_queue)) {
1987                 iwl_mvm_disable_txq(mvm, mvm->probe_queue,
1988                                     vif->hw_queue[0], IWL_MAX_TID_COUNT,
1989                                     0);
1990                 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(mvm->probe_queue);
1991         }
1992
1993         if (mvmvif->bcast_sta.tfd_queue_msk & BIT(mvm->p2p_dev_queue)) {
1994                 iwl_mvm_disable_txq(mvm, mvm->p2p_dev_queue,
1995                                     vif->hw_queue[0], IWL_MAX_TID_COUNT,
1996                                     0);
1997                 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(mvm->p2p_dev_queue);
1998         }
1999 }
2000
2001 /* Send the FW a request to remove the station from it's internal data
2002  * structures, but DO NOT remove the entry from the local data structures. */
2003 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2004 {
2005         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2006         int ret;
2007
2008         lockdep_assert_held(&mvm->mutex);
2009
2010         if (iwl_mvm_is_dqa_supported(mvm))
2011                 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2012
2013         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2014         if (ret)
2015                 IWL_WARN(mvm, "Failed sending remove station\n");
2016         return ret;
2017 }
2018
2019 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2020 {
2021         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2022         u32 qmask = 0;
2023
2024         lockdep_assert_held(&mvm->mutex);
2025
2026         if (!iwl_mvm_is_dqa_supported(mvm)) {
2027                 qmask = iwl_mvm_mac_get_queues_mask(vif);
2028
2029                 /*
2030                  * The firmware defines the TFD queue mask to only be relevant
2031                  * for *unicast* queues, so the multicast (CAB) queue shouldn't
2032                  * be included. This only happens in NL80211_IFTYPE_AP vif type,
2033                  * so the next line will only have an effect there.
2034                  */
2035                 qmask &= ~BIT(vif->cab_queue);
2036         }
2037
2038         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
2039                                         ieee80211_vif_type_p2p(vif),
2040                                         IWL_STA_GENERAL_PURPOSE);
2041 }
2042
2043 /* Allocate a new station entry for the broadcast station to the given vif,
2044  * and send it to the FW.
2045  * Note that each P2P mac should have its own broadcast station.
2046  *
2047  * @mvm: the mvm component
2048  * @vif: the interface to which the broadcast station is added
2049  * @bsta: the broadcast station to add. */
2050 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2051 {
2052         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2053         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2054         int ret;
2055
2056         lockdep_assert_held(&mvm->mutex);
2057
2058         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2059         if (ret)
2060                 return ret;
2061
2062         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2063
2064         if (ret)
2065                 iwl_mvm_dealloc_int_sta(mvm, bsta);
2066
2067         return ret;
2068 }
2069
2070 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2071 {
2072         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2073
2074         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2075 }
2076
2077 /*
2078  * Send the FW a request to remove the station from it's internal data
2079  * structures, and in addition remove it from the local data structure.
2080  */
2081 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2082 {
2083         int ret;
2084
2085         lockdep_assert_held(&mvm->mutex);
2086
2087         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2088
2089         iwl_mvm_dealloc_bcast_sta(mvm, vif);
2090
2091         return ret;
2092 }
2093
2094 /*
2095  * Allocate a new station entry for the multicast station to the given vif,
2096  * and send it to the FW.
2097  * Note that each AP/GO mac should have its own multicast station.
2098  *
2099  * @mvm: the mvm component
2100  * @vif: the interface to which the multicast station is added
2101  */
2102 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2103 {
2104         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2105         struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2106         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2107         const u8 *maddr = _maddr;
2108         struct iwl_trans_txq_scd_cfg cfg = {
2109                 .fifo = IWL_MVM_TX_FIFO_MCAST,
2110                 .sta_id = msta->sta_id,
2111                 .tid = IWL_MAX_TID_COUNT,
2112                 .aggregate = false,
2113                 .frame_limit = IWL_FRAME_LIMIT,
2114         };
2115         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2116         int ret;
2117
2118         lockdep_assert_held(&mvm->mutex);
2119
2120         if (!iwl_mvm_is_dqa_supported(mvm))
2121                 return 0;
2122
2123         if (WARN_ON(vif->type != NL80211_IFTYPE_AP))
2124                 return -ENOTSUPP;
2125
2126         /*
2127          * While in previous FWs we had to exclude cab queue from TFD queue
2128          * mask, now it is needed as any other queue.
2129          */
2130         if (!iwl_mvm_has_new_tx_api(mvm) &&
2131             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2132                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2133                                    &cfg, timeout);
2134                 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2135         }
2136         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2137                                          mvmvif->id, mvmvif->color);
2138         if (ret) {
2139                 iwl_mvm_dealloc_int_sta(mvm, msta);
2140                 return ret;
2141         }
2142
2143         /*
2144          * Enable cab queue after the ADD_STA command is sent.
2145          * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2146          * command with unknown station id, and for FW that doesn't support
2147          * station API since the cab queue is not included in the
2148          * tfd_queue_mask.
2149          */
2150         if (iwl_mvm_has_new_tx_api(mvm)) {
2151                 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2152                                                     msta->sta_id,
2153                                                     IWL_MAX_TID_COUNT,
2154                                                     timeout);
2155                 mvmvif->cab_queue = queue;
2156         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2157                                IWL_UCODE_TLV_API_STA_TYPE)) {
2158                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2159                                    &cfg, timeout);
2160         }
2161
2162         return 0;
2163 }
2164
2165 /*
2166  * Send the FW a request to remove the station from it's internal data
2167  * structures, and in addition remove it from the local data structure.
2168  */
2169 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2170 {
2171         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2172         int ret;
2173
2174         lockdep_assert_held(&mvm->mutex);
2175
2176         if (!iwl_mvm_is_dqa_supported(mvm))
2177                 return 0;
2178
2179         iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2180                             IWL_MAX_TID_COUNT, 0);
2181
2182         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2183         if (ret)
2184                 IWL_WARN(mvm, "Failed sending remove station\n");
2185
2186         return ret;
2187 }
2188
2189 #define IWL_MAX_RX_BA_SESSIONS 16
2190
2191 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2192 {
2193         struct iwl_mvm_delba_notif notif = {
2194                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2195                 .metadata.sync = 1,
2196                 .delba.baid = baid,
2197         };
2198         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2199 };
2200
2201 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2202                                  struct iwl_mvm_baid_data *data)
2203 {
2204         int i;
2205
2206         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2207
2208         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2209                 int j;
2210                 struct iwl_mvm_reorder_buffer *reorder_buf =
2211                         &data->reorder_buf[i];
2212
2213                 spin_lock_bh(&reorder_buf->lock);
2214                 if (likely(!reorder_buf->num_stored)) {
2215                         spin_unlock_bh(&reorder_buf->lock);
2216                         continue;
2217                 }
2218
2219                 /*
2220                  * This shouldn't happen in regular DELBA since the internal
2221                  * delBA notification should trigger a release of all frames in
2222                  * the reorder buffer.
2223                  */
2224                 WARN_ON(1);
2225
2226                 for (j = 0; j < reorder_buf->buf_size; j++)
2227                         __skb_queue_purge(&reorder_buf->entries[j]);
2228                 /*
2229                  * Prevent timer re-arm. This prevents a very far fetched case
2230                  * where we timed out on the notification. There may be prior
2231                  * RX frames pending in the RX queue before the notification
2232                  * that might get processed between now and the actual deletion
2233                  * and we would re-arm the timer although we are deleting the
2234                  * reorder buffer.
2235                  */
2236                 reorder_buf->removed = true;
2237                 spin_unlock_bh(&reorder_buf->lock);
2238                 del_timer_sync(&reorder_buf->reorder_timer);
2239         }
2240 }
2241
2242 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2243                                         u32 sta_id,
2244                                         struct iwl_mvm_baid_data *data,
2245                                         u16 ssn, u8 buf_size)
2246 {
2247         int i;
2248
2249         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2250                 struct iwl_mvm_reorder_buffer *reorder_buf =
2251                         &data->reorder_buf[i];
2252                 int j;
2253
2254                 reorder_buf->num_stored = 0;
2255                 reorder_buf->head_sn = ssn;
2256                 reorder_buf->buf_size = buf_size;
2257                 /* rx reorder timer */
2258                 reorder_buf->reorder_timer.function =
2259                         iwl_mvm_reorder_timer_expired;
2260                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2261                 init_timer(&reorder_buf->reorder_timer);
2262                 spin_lock_init(&reorder_buf->lock);
2263                 reorder_buf->mvm = mvm;
2264                 reorder_buf->queue = i;
2265                 reorder_buf->sta_id = sta_id;
2266                 reorder_buf->valid = false;
2267                 for (j = 0; j < reorder_buf->buf_size; j++)
2268                         __skb_queue_head_init(&reorder_buf->entries[j]);
2269         }
2270 }
2271
2272 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2273                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2274 {
2275         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2276         struct iwl_mvm_add_sta_cmd cmd = {};
2277         struct iwl_mvm_baid_data *baid_data = NULL;
2278         int ret;
2279         u32 status;
2280
2281         lockdep_assert_held(&mvm->mutex);
2282
2283         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2284                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2285                 return -ENOSPC;
2286         }
2287
2288         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2289                 /*
2290                  * Allocate here so if allocation fails we can bail out early
2291                  * before starting the BA session in the firmware
2292                  */
2293                 baid_data = kzalloc(sizeof(*baid_data) +
2294                                     mvm->trans->num_rx_queues *
2295                                     sizeof(baid_data->reorder_buf[0]),
2296                                     GFP_KERNEL);
2297                 if (!baid_data)
2298                         return -ENOMEM;
2299         }
2300
2301         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2302         cmd.sta_id = mvm_sta->sta_id;
2303         cmd.add_modify = STA_MODE_MODIFY;
2304         if (start) {
2305                 cmd.add_immediate_ba_tid = (u8) tid;
2306                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2307                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2308         } else {
2309                 cmd.remove_immediate_ba_tid = (u8) tid;
2310         }
2311         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2312                                   STA_MODIFY_REMOVE_BA_TID;
2313
2314         status = ADD_STA_SUCCESS;
2315         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2316                                           iwl_mvm_add_sta_cmd_size(mvm),
2317                                           &cmd, &status);
2318         if (ret)
2319                 goto out_free;
2320
2321         switch (status & IWL_ADD_STA_STATUS_MASK) {
2322         case ADD_STA_SUCCESS:
2323                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2324                              start ? "start" : "stopp");
2325                 break;
2326         case ADD_STA_IMMEDIATE_BA_FAILURE:
2327                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2328                 ret = -ENOSPC;
2329                 break;
2330         default:
2331                 ret = -EIO;
2332                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2333                         start ? "start" : "stopp", status);
2334                 break;
2335         }
2336
2337         if (ret)
2338                 goto out_free;
2339
2340         if (start) {
2341                 u8 baid;
2342
2343                 mvm->rx_ba_sessions++;
2344
2345                 if (!iwl_mvm_has_new_rx_api(mvm))
2346                         return 0;
2347
2348                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2349                         ret = -EINVAL;
2350                         goto out_free;
2351                 }
2352                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2353                             IWL_ADD_STA_BAID_SHIFT);
2354                 baid_data->baid = baid;
2355                 baid_data->timeout = timeout;
2356                 baid_data->last_rx = jiffies;
2357                 setup_timer(&baid_data->session_timer,
2358                             iwl_mvm_rx_agg_session_expired,
2359                             (unsigned long)&mvm->baid_map[baid]);
2360                 baid_data->mvm = mvm;
2361                 baid_data->tid = tid;
2362                 baid_data->sta_id = mvm_sta->sta_id;
2363
2364                 mvm_sta->tid_to_baid[tid] = baid;
2365                 if (timeout)
2366                         mod_timer(&baid_data->session_timer,
2367                                   TU_TO_EXP_TIME(timeout * 2));
2368
2369                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2370                                             baid_data, ssn, buf_size);
2371                 /*
2372                  * protect the BA data with RCU to cover a case where our
2373                  * internal RX sync mechanism will timeout (not that it's
2374                  * supposed to happen) and we will free the session data while
2375                  * RX is being processed in parallel
2376                  */
2377                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2378                              mvm_sta->sta_id, tid, baid);
2379                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2380                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2381         } else  {
2382                 u8 baid = mvm_sta->tid_to_baid[tid];
2383
2384                 if (mvm->rx_ba_sessions > 0)
2385                         /* check that restart flow didn't zero the counter */
2386                         mvm->rx_ba_sessions--;
2387                 if (!iwl_mvm_has_new_rx_api(mvm))
2388                         return 0;
2389
2390                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2391                         return -EINVAL;
2392
2393                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2394                 if (WARN_ON(!baid_data))
2395                         return -EINVAL;
2396
2397                 /* synchronize all rx queues so we can safely delete */
2398                 iwl_mvm_free_reorder(mvm, baid_data);
2399                 del_timer_sync(&baid_data->session_timer);
2400                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2401                 kfree_rcu(baid_data, rcu_head);
2402                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2403         }
2404         return 0;
2405
2406 out_free:
2407         kfree(baid_data);
2408         return ret;
2409 }
2410
2411 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2412                        int tid, u8 queue, bool start)
2413 {
2414         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2415         struct iwl_mvm_add_sta_cmd cmd = {};
2416         int ret;
2417         u32 status;
2418
2419         lockdep_assert_held(&mvm->mutex);
2420
2421         if (start) {
2422                 mvm_sta->tfd_queue_msk |= BIT(queue);
2423                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2424         } else {
2425                 /* In DQA-mode the queue isn't removed on agg termination */
2426                 if (!iwl_mvm_is_dqa_supported(mvm))
2427                         mvm_sta->tfd_queue_msk &= ~BIT(queue);
2428                 mvm_sta->tid_disable_agg |= BIT(tid);
2429         }
2430
2431         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2432         cmd.sta_id = mvm_sta->sta_id;
2433         cmd.add_modify = STA_MODE_MODIFY;
2434         if (!iwl_mvm_has_new_tx_api(mvm))
2435                 cmd.modify_mask = STA_MODIFY_QUEUES;
2436         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2437         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2438         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2439
2440         status = ADD_STA_SUCCESS;
2441         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2442                                           iwl_mvm_add_sta_cmd_size(mvm),
2443                                           &cmd, &status);
2444         if (ret)
2445                 return ret;
2446
2447         switch (status & IWL_ADD_STA_STATUS_MASK) {
2448         case ADD_STA_SUCCESS:
2449                 break;
2450         default:
2451                 ret = -EIO;
2452                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2453                         start ? "start" : "stopp", status);
2454                 break;
2455         }
2456
2457         return ret;
2458 }
2459
2460 const u8 tid_to_mac80211_ac[] = {
2461         IEEE80211_AC_BE,
2462         IEEE80211_AC_BK,
2463         IEEE80211_AC_BK,
2464         IEEE80211_AC_BE,
2465         IEEE80211_AC_VI,
2466         IEEE80211_AC_VI,
2467         IEEE80211_AC_VO,
2468         IEEE80211_AC_VO,
2469         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2470 };
2471
2472 static const u8 tid_to_ucode_ac[] = {
2473         AC_BE,
2474         AC_BK,
2475         AC_BK,
2476         AC_BE,
2477         AC_VI,
2478         AC_VI,
2479         AC_VO,
2480         AC_VO,
2481 };
2482
2483 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2484                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2485 {
2486         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2487         struct iwl_mvm_tid_data *tid_data;
2488         int txq_id;
2489         int ret;
2490
2491         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2492                 return -EINVAL;
2493
2494         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2495                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2496                         mvmsta->tid_data[tid].state);
2497                 return -ENXIO;
2498         }
2499
2500         lockdep_assert_held(&mvm->mutex);
2501
2502         spin_lock_bh(&mvmsta->lock);
2503
2504         /* possible race condition - we entered D0i3 while starting agg */
2505         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2506                 spin_unlock_bh(&mvmsta->lock);
2507                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2508                 return -EIO;
2509         }
2510
2511         spin_lock(&mvm->queue_info_lock);
2512
2513         /*
2514          * Note the possible cases:
2515          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2516          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2517          *      one and mark it as reserved
2518          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2519          *      non-DQA mode, since the TXQ hasn't yet been allocated
2520          * Don't support case 3 for new TX path as it is not expected to happen
2521          * and aggregation will be offloaded soon anyway
2522          */
2523         txq_id = mvmsta->tid_data[tid].txq_id;
2524         if (iwl_mvm_has_new_tx_api(mvm)) {
2525                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2526                         ret = -ENXIO;
2527                         goto release_locks;
2528                 }
2529         } else if (iwl_mvm_is_dqa_supported(mvm) &&
2530                    unlikely(mvm->queue_info[txq_id].status ==
2531                             IWL_MVM_QUEUE_SHARED)) {
2532                 ret = -ENXIO;
2533                 IWL_DEBUG_TX_QUEUES(mvm,
2534                                     "Can't start tid %d agg on shared queue!\n",
2535                                     tid);
2536                 goto release_locks;
2537         } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2538             mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2539                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2540                                                  mvm->first_agg_queue,
2541                                                  mvm->last_agg_queue);
2542                 if (txq_id < 0) {
2543                         ret = txq_id;
2544                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2545                         goto release_locks;
2546                 }
2547                 /*
2548                  * TXQ shouldn't be in inactive mode for non-DQA, so getting
2549                  * an inactive queue from iwl_mvm_find_free_queue() is
2550                  * certainly a bug
2551                  */
2552                 WARN_ON(mvm->queue_info[txq_id].status ==
2553                         IWL_MVM_QUEUE_INACTIVE);
2554
2555                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2556                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2557         }
2558
2559         spin_unlock(&mvm->queue_info_lock);
2560
2561         IWL_DEBUG_TX_QUEUES(mvm,
2562                             "AGG for tid %d will be on queue #%d\n",
2563                             tid, txq_id);
2564
2565         tid_data = &mvmsta->tid_data[tid];
2566         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2567         tid_data->txq_id = txq_id;
2568         *ssn = tid_data->ssn;
2569
2570         IWL_DEBUG_TX_QUEUES(mvm,
2571                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2572                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2573                             tid_data->next_reclaimed);
2574
2575         if (tid_data->ssn == tid_data->next_reclaimed) {
2576                 tid_data->state = IWL_AGG_STARTING;
2577                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2578         } else {
2579                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2580         }
2581
2582         ret = 0;
2583         goto out;
2584
2585 release_locks:
2586         spin_unlock(&mvm->queue_info_lock);
2587 out:
2588         spin_unlock_bh(&mvmsta->lock);
2589
2590         return ret;
2591 }
2592
2593 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2594                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2595                             bool amsdu)
2596 {
2597         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2598         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2599         unsigned int wdg_timeout =
2600                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2601         int queue, ret;
2602         bool alloc_queue = true;
2603         enum iwl_mvm_queue_status queue_status;
2604         u16 ssn;
2605
2606         struct iwl_trans_txq_scd_cfg cfg = {
2607                 .sta_id = mvmsta->sta_id,
2608                 .tid = tid,
2609                 .frame_limit = buf_size,
2610                 .aggregate = true,
2611         };
2612
2613         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2614                      != IWL_MAX_TID_COUNT);
2615
2616         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2617
2618         spin_lock_bh(&mvmsta->lock);
2619         ssn = tid_data->ssn;
2620         queue = tid_data->txq_id;
2621         tid_data->state = IWL_AGG_ON;
2622         mvmsta->agg_tids |= BIT(tid);
2623         tid_data->ssn = 0xffff;
2624         tid_data->amsdu_in_ampdu_allowed = amsdu;
2625         spin_unlock_bh(&mvmsta->lock);
2626
2627         if (iwl_mvm_has_new_tx_api(mvm)) {
2628                 /*
2629                  * If no queue iwl_mvm_sta_tx_agg_start() would have failed so
2630                  * no need to check queue's status
2631                  */
2632                 if (buf_size < mvmsta->max_agg_bufsize)
2633                         return -ENOTSUPP;
2634
2635                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2636                 if (ret)
2637                         return -EIO;
2638                 goto out;
2639         }
2640
2641         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2642
2643         spin_lock_bh(&mvm->queue_info_lock);
2644         queue_status = mvm->queue_info[queue].status;
2645         spin_unlock_bh(&mvm->queue_info_lock);
2646
2647         /* In DQA mode, the existing queue might need to be reconfigured */
2648         if (iwl_mvm_is_dqa_supported(mvm)) {
2649                 /* Maybe there is no need to even alloc a queue... */
2650                 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2651                         alloc_queue = false;
2652
2653                 /*
2654                  * Only reconfig the SCD for the queue if the window size has
2655                  * changed from current (become smaller)
2656                  */
2657                 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2658                         /*
2659                          * If reconfiguring an existing queue, it first must be
2660                          * drained
2661                          */
2662                         ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2663                                                              BIT(queue));
2664                         if (ret) {
2665                                 IWL_ERR(mvm,
2666                                         "Error draining queue before reconfig\n");
2667                                 return ret;
2668                         }
2669
2670                         ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2671                                                    mvmsta->sta_id, tid,
2672                                                    buf_size, ssn);
2673                         if (ret) {
2674                                 IWL_ERR(mvm,
2675                                         "Error reconfiguring TXQ #%d\n", queue);
2676                                 return ret;
2677                         }
2678                 }
2679         }
2680
2681         if (alloc_queue)
2682                 iwl_mvm_enable_txq(mvm, queue,
2683                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2684                                    &cfg, wdg_timeout);
2685
2686         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2687         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2688                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2689                 if (ret)
2690                         return -EIO;
2691         }
2692
2693         /* No need to mark as reserved */
2694         spin_lock_bh(&mvm->queue_info_lock);
2695         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2696         spin_unlock_bh(&mvm->queue_info_lock);
2697
2698 out:
2699         /*
2700          * Even though in theory the peer could have different
2701          * aggregation reorder buffer sizes for different sessions,
2702          * our ucode doesn't allow for that and has a global limit
2703          * for each station. Therefore, use the minimum of all the
2704          * aggregation sessions and our default value.
2705          */
2706         mvmsta->max_agg_bufsize =
2707                 min(mvmsta->max_agg_bufsize, buf_size);
2708         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2709
2710         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2711                      sta->addr, tid);
2712
2713         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2714 }
2715
2716 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2717                                         struct iwl_mvm_sta *mvmsta,
2718                                         u16 txq_id)
2719 {
2720         if (iwl_mvm_has_new_tx_api(mvm))
2721                 return;
2722
2723         spin_lock_bh(&mvm->queue_info_lock);
2724         /*
2725          * The TXQ is marked as reserved only if no traffic came through yet
2726          * This means no traffic has been sent on this TID (agg'd or not), so
2727          * we no longer have use for the queue. Since it hasn't even been
2728          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2729          * free.
2730          */
2731         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2732                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2733
2734         spin_unlock_bh(&mvm->queue_info_lock);
2735 }
2736
2737 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2738                             struct ieee80211_sta *sta, u16 tid)
2739 {
2740         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2741         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2742         u16 txq_id;
2743         int err;
2744
2745         /*
2746          * If mac80211 is cleaning its state, then say that we finished since
2747          * our state has been cleared anyway.
2748          */
2749         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2750                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2751                 return 0;
2752         }
2753
2754         spin_lock_bh(&mvmsta->lock);
2755
2756         txq_id = tid_data->txq_id;
2757
2758         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2759                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2760
2761         mvmsta->agg_tids &= ~BIT(tid);
2762
2763         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2764
2765         switch (tid_data->state) {
2766         case IWL_AGG_ON:
2767                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2768
2769                 IWL_DEBUG_TX_QUEUES(mvm,
2770                                     "ssn = %d, next_recl = %d\n",
2771                                     tid_data->ssn, tid_data->next_reclaimed);
2772
2773                 /* There are still packets for this RA / TID in the HW */
2774                 if (tid_data->ssn != tid_data->next_reclaimed) {
2775                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2776                         err = 0;
2777                         break;
2778                 }
2779
2780                 tid_data->ssn = 0xffff;
2781                 tid_data->state = IWL_AGG_OFF;
2782                 spin_unlock_bh(&mvmsta->lock);
2783
2784                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2785
2786                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2787
2788                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2789                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2790
2791                         iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2792                 }
2793                 return 0;
2794         case IWL_AGG_STARTING:
2795         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2796                 /*
2797                  * The agg session has been stopped before it was set up. This
2798                  * can happen when the AddBA timer times out for example.
2799                  */
2800
2801                 /* No barriers since we are under mutex */
2802                 lockdep_assert_held(&mvm->mutex);
2803
2804                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2805                 tid_data->state = IWL_AGG_OFF;
2806                 err = 0;
2807                 break;
2808         default:
2809                 IWL_ERR(mvm,
2810                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2811                         mvmsta->sta_id, tid, tid_data->state);
2812                 IWL_ERR(mvm,
2813                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2814                 err = -EINVAL;
2815         }
2816
2817         spin_unlock_bh(&mvmsta->lock);
2818
2819         return err;
2820 }
2821
2822 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2823                             struct ieee80211_sta *sta, u16 tid)
2824 {
2825         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2826         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2827         u16 txq_id;
2828         enum iwl_mvm_agg_state old_state;
2829
2830         /*
2831          * First set the agg state to OFF to avoid calling
2832          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2833          */
2834         spin_lock_bh(&mvmsta->lock);
2835         txq_id = tid_data->txq_id;
2836         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2837                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2838         old_state = tid_data->state;
2839         tid_data->state = IWL_AGG_OFF;
2840         mvmsta->agg_tids &= ~BIT(tid);
2841         spin_unlock_bh(&mvmsta->lock);
2842
2843         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2844
2845         if (old_state >= IWL_AGG_ON) {
2846                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2847                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2848                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2849                 iwl_trans_wait_tx_queues_empty(mvm->trans,
2850                                                mvmsta->tfd_queue_msk);
2851                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2852
2853                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2854
2855                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2856                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2857
2858                         iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2859                                             tid, 0);
2860                 }
2861         }
2862
2863         return 0;
2864 }
2865
2866 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2867 {
2868         int i, max = -1, max_offs = -1;
2869
2870         lockdep_assert_held(&mvm->mutex);
2871
2872         /* Pick the unused key offset with the highest 'deleted'
2873          * counter. Every time a key is deleted, all the counters
2874          * are incremented and the one that was just deleted is
2875          * reset to zero. Thus, the highest counter is the one
2876          * that was deleted longest ago. Pick that one.
2877          */
2878         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2879                 if (test_bit(i, mvm->fw_key_table))
2880                         continue;
2881                 if (mvm->fw_key_deleted[i] > max) {
2882                         max = mvm->fw_key_deleted[i];
2883                         max_offs = i;
2884                 }
2885         }
2886
2887         if (max_offs < 0)
2888                 return STA_KEY_IDX_INVALID;
2889
2890         return max_offs;
2891 }
2892
2893 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2894                                                struct ieee80211_vif *vif,
2895                                                struct ieee80211_sta *sta)
2896 {
2897         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2898
2899         if (sta)
2900                 return iwl_mvm_sta_from_mac80211(sta);
2901
2902         /*
2903          * The device expects GTKs for station interfaces to be
2904          * installed as GTKs for the AP station. If we have no
2905          * station ID, then use AP's station ID.
2906          */
2907         if (vif->type == NL80211_IFTYPE_STATION &&
2908             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2909                 u8 sta_id = mvmvif->ap_sta_id;
2910
2911                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2912                                             lockdep_is_held(&mvm->mutex));
2913
2914                 /*
2915                  * It is possible that the 'sta' parameter is NULL,
2916                  * for example when a GTK is removed - the sta_id will then
2917                  * be the AP ID, and no station was passed by mac80211.
2918                  */
2919                 if (IS_ERR_OR_NULL(sta))
2920                         return NULL;
2921
2922                 return iwl_mvm_sta_from_mac80211(sta);
2923         }
2924
2925         return NULL;
2926 }
2927
2928 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2929                                 struct iwl_mvm_sta *mvm_sta,
2930                                 struct ieee80211_key_conf *key, bool mcast,
2931                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2932                                 u8 key_offset)
2933 {
2934         union {
2935                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2936                 struct iwl_mvm_add_sta_key_cmd cmd;
2937         } u = {};
2938         __le16 key_flags;
2939         int ret;
2940         u32 status;
2941         u16 keyidx;
2942         u64 pn = 0;
2943         int i, size;
2944         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2945                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2946
2947         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2948                  STA_KEY_FLG_KEYID_MSK;
2949         key_flags = cpu_to_le16(keyidx);
2950         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2951
2952         switch (key->cipher) {
2953         case WLAN_CIPHER_SUITE_TKIP:
2954                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2955                 if (new_api) {
2956                         memcpy((void *)&u.cmd.tx_mic_key,
2957                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2958                                IWL_MIC_KEY_SIZE);
2959
2960                         memcpy((void *)&u.cmd.rx_mic_key,
2961                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2962                                IWL_MIC_KEY_SIZE);
2963                         pn = atomic64_read(&key->tx_pn);
2964
2965                 } else {
2966                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2967                         for (i = 0; i < 5; i++)
2968                                 u.cmd_v1.tkip_rx_ttak[i] =
2969                                         cpu_to_le16(tkip_p1k[i]);
2970                 }
2971                 memcpy(u.cmd.common.key, key->key, key->keylen);
2972                 break;
2973         case WLAN_CIPHER_SUITE_CCMP:
2974                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2975                 memcpy(u.cmd.common.key, key->key, key->keylen);
2976                 if (new_api)
2977                         pn = atomic64_read(&key->tx_pn);
2978                 break;
2979         case WLAN_CIPHER_SUITE_WEP104:
2980                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2981                 /* fall through */
2982         case WLAN_CIPHER_SUITE_WEP40:
2983                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2984                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2985                 break;
2986         case WLAN_CIPHER_SUITE_GCMP_256:
2987                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2988                 /* fall through */
2989         case WLAN_CIPHER_SUITE_GCMP:
2990                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2991                 memcpy(u.cmd.common.key, key->key, key->keylen);
2992                 if (new_api)
2993                         pn = atomic64_read(&key->tx_pn);
2994                 break;
2995         default:
2996                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2997                 memcpy(u.cmd.common.key, key->key, key->keylen);
2998         }
2999
3000         if (mcast)
3001                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3002
3003         u.cmd.common.key_offset = key_offset;
3004         u.cmd.common.key_flags = key_flags;
3005         u.cmd.common.sta_id = mvm_sta->sta_id;
3006
3007         if (new_api) {
3008                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3009                 size = sizeof(u.cmd);
3010         } else {
3011                 size = sizeof(u.cmd_v1);
3012         }
3013
3014         status = ADD_STA_SUCCESS;
3015         if (cmd_flags & CMD_ASYNC)
3016                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3017                                            &u.cmd);
3018         else
3019                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3020                                                   &u.cmd, &status);
3021
3022         switch (status) {
3023         case ADD_STA_SUCCESS:
3024                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3025                 break;
3026         default:
3027                 ret = -EIO;
3028                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3029                 break;
3030         }
3031
3032         return ret;
3033 }
3034
3035 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3036                                  struct ieee80211_key_conf *keyconf,
3037                                  u8 sta_id, bool remove_key)
3038 {
3039         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3040
3041         /* verify the key details match the required command's expectations */
3042         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3043                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3044                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3045                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3046                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3047                 return -EINVAL;
3048
3049         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3050                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3051                 return -EINVAL;
3052
3053         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3054         igtk_cmd.sta_id = cpu_to_le32(sta_id);
3055
3056         if (remove_key) {
3057                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3058         } else {
3059                 struct ieee80211_key_seq seq;
3060                 const u8 *pn;
3061
3062                 switch (keyconf->cipher) {
3063                 case WLAN_CIPHER_SUITE_AES_CMAC:
3064                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3065                         break;
3066                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3067                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3068                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3069                         break;
3070                 default:
3071                         return -EINVAL;
3072                 }
3073
3074                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3075                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3076                         igtk_cmd.ctrl_flags |=
3077                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3078                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3079                 pn = seq.aes_cmac.pn;
3080                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3081                                                        ((u64) pn[4] << 8) |
3082                                                        ((u64) pn[3] << 16) |
3083                                                        ((u64) pn[2] << 24) |
3084                                                        ((u64) pn[1] << 32) |
3085                                                        ((u64) pn[0] << 40));
3086         }
3087
3088         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3089                        remove_key ? "removing" : "installing",
3090                        igtk_cmd.sta_id);
3091
3092         if (!iwl_mvm_has_new_rx_api(mvm)) {
3093                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3094                         .ctrl_flags = igtk_cmd.ctrl_flags,
3095                         .key_id = igtk_cmd.key_id,
3096                         .sta_id = igtk_cmd.sta_id,
3097                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3098                 };
3099
3100                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3101                        ARRAY_SIZE(igtk_cmd_v1.igtk));
3102                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3103                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3104         }
3105         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3106                                     sizeof(igtk_cmd), &igtk_cmd);
3107 }
3108
3109
3110 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3111                                        struct ieee80211_vif *vif,
3112                                        struct ieee80211_sta *sta)
3113 {
3114         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3115
3116         if (sta)
3117                 return sta->addr;
3118
3119         if (vif->type == NL80211_IFTYPE_STATION &&
3120             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3121                 u8 sta_id = mvmvif->ap_sta_id;
3122                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3123                                                 lockdep_is_held(&mvm->mutex));
3124                 return sta->addr;
3125         }
3126
3127
3128         return NULL;
3129 }
3130
3131 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3132                                  struct ieee80211_vif *vif,
3133                                  struct ieee80211_sta *sta,
3134                                  struct ieee80211_key_conf *keyconf,
3135                                  u8 key_offset,
3136                                  bool mcast)
3137 {
3138         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3139         int ret;
3140         const u8 *addr;
3141         struct ieee80211_key_seq seq;
3142         u16 p1k[5];
3143
3144         switch (keyconf->cipher) {
3145         case WLAN_CIPHER_SUITE_TKIP:
3146                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3147                 /* get phase 1 key from mac80211 */
3148                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3149                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3150                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3151                                            seq.tkip.iv32, p1k, 0, key_offset);
3152                 break;
3153         case WLAN_CIPHER_SUITE_CCMP:
3154         case WLAN_CIPHER_SUITE_WEP40:
3155         case WLAN_CIPHER_SUITE_WEP104:
3156         case WLAN_CIPHER_SUITE_GCMP:
3157         case WLAN_CIPHER_SUITE_GCMP_256:
3158                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3159                                            0, NULL, 0, key_offset);
3160                 break;
3161         default:
3162                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3163                                            0, NULL, 0, key_offset);
3164         }
3165
3166         return ret;
3167 }
3168
3169 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3170                                     struct ieee80211_key_conf *keyconf,
3171                                     bool mcast)
3172 {
3173         union {
3174                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3175                 struct iwl_mvm_add_sta_key_cmd cmd;
3176         } u = {};
3177         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3178                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3179         __le16 key_flags;
3180         int ret, size;
3181         u32 status;
3182
3183         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3184                                  STA_KEY_FLG_KEYID_MSK);
3185         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3186         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3187
3188         if (mcast)
3189                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3190
3191         /*
3192          * The fields assigned here are in the same location at the start
3193          * of the command, so we can do this union trick.
3194          */
3195         u.cmd.common.key_flags = key_flags;
3196         u.cmd.common.key_offset = keyconf->hw_key_idx;
3197         u.cmd.common.sta_id = sta_id;
3198
3199         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3200
3201         status = ADD_STA_SUCCESS;
3202         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3203                                           &status);
3204
3205         switch (status) {
3206         case ADD_STA_SUCCESS:
3207                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3208                 break;
3209         default:
3210                 ret = -EIO;
3211                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3212                 break;
3213         }
3214
3215         return ret;
3216 }
3217
3218 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3219                         struct ieee80211_vif *vif,
3220                         struct ieee80211_sta *sta,
3221                         struct ieee80211_key_conf *keyconf,
3222                         u8 key_offset)
3223 {
3224         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3225         struct iwl_mvm_sta *mvm_sta;
3226         u8 sta_id;
3227         int ret;
3228         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3229
3230         lockdep_assert_held(&mvm->mutex);
3231
3232         /* Get the station id from the mvm local station table */
3233         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3234         if (!mvm_sta) {
3235                 IWL_ERR(mvm, "Failed to find station\n");
3236                 return -EINVAL;
3237         }
3238         sta_id = mvm_sta->sta_id;
3239
3240         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3241             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3242             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3243                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3244                 goto end;
3245         }
3246
3247         /*
3248          * It is possible that the 'sta' parameter is NULL, and thus
3249          * there is a need to retrieve  the sta from the local station table.
3250          */
3251         if (!sta) {
3252                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3253                                                 lockdep_is_held(&mvm->mutex));
3254                 if (IS_ERR_OR_NULL(sta)) {
3255                         IWL_ERR(mvm, "Invalid station id\n");
3256                         return -EINVAL;
3257                 }
3258         }
3259
3260         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3261                 return -EINVAL;
3262
3263         /* If the key_offset is not pre-assigned, we need to find a
3264          * new offset to use.  In normal cases, the offset is not
3265          * pre-assigned, but during HW_RESTART we want to reuse the
3266          * same indices, so we pass them when this function is called.
3267          *
3268          * In D3 entry, we need to hardcoded the indices (because the
3269          * firmware hardcodes the PTK offset to 0).  In this case, we
3270          * need to make sure we don't overwrite the hw_key_idx in the
3271          * keyconf structure, because otherwise we cannot configure
3272          * the original ones back when resuming.
3273          */
3274         if (key_offset == STA_KEY_IDX_INVALID) {
3275                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3276                 if (key_offset == STA_KEY_IDX_INVALID)
3277                         return -ENOSPC;
3278                 keyconf->hw_key_idx = key_offset;
3279         }
3280
3281         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3282         if (ret)
3283                 goto end;
3284
3285         /*
3286          * For WEP, the same key is used for multicast and unicast. Upload it
3287          * again, using the same key offset, and now pointing the other one
3288          * to the same key slot (offset).
3289          * If this fails, remove the original as well.
3290          */
3291         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3292             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
3293                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3294                                             key_offset, !mcast);
3295                 if (ret) {
3296                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3297                         goto end;
3298                 }
3299         }
3300
3301         __set_bit(key_offset, mvm->fw_key_table);
3302
3303 end:
3304         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3305                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3306                       sta ? sta->addr : zero_addr, ret);
3307         return ret;
3308 }
3309
3310 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3311                            struct ieee80211_vif *vif,
3312                            struct ieee80211_sta *sta,
3313                            struct ieee80211_key_conf *keyconf)
3314 {
3315         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3316         struct iwl_mvm_sta *mvm_sta;
3317         u8 sta_id = IWL_MVM_INVALID_STA;
3318         int ret, i;
3319
3320         lockdep_assert_held(&mvm->mutex);
3321
3322         /* Get the station from the mvm local station table */
3323         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3324         if (!mvm_sta) {
3325                 IWL_ERR(mvm, "Failed to find station\n");
3326                 return -EINVAL;
3327         }
3328         sta_id = mvm_sta->sta_id;
3329
3330         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3331                       keyconf->keyidx, sta_id);
3332
3333         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3334             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3335             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3336                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3337
3338         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3339                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3340                         keyconf->hw_key_idx);
3341                 return -ENOENT;
3342         }
3343
3344         /* track which key was deleted last */
3345         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3346                 if (mvm->fw_key_deleted[i] < U8_MAX)
3347                         mvm->fw_key_deleted[i]++;
3348         }
3349         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3350
3351         if (!mvm_sta) {
3352                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3353                 return 0;
3354         }
3355
3356         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3357         if (ret)
3358                 return ret;
3359
3360         /* delete WEP key twice to get rid of (now useless) offset */
3361         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3362             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3363                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3364
3365         return ret;
3366 }
3367
3368 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3369                              struct ieee80211_vif *vif,
3370                              struct ieee80211_key_conf *keyconf,
3371                              struct ieee80211_sta *sta, u32 iv32,
3372                              u16 *phase1key)
3373 {
3374         struct iwl_mvm_sta *mvm_sta;
3375         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3376
3377         rcu_read_lock();
3378
3379         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3380         if (WARN_ON_ONCE(!mvm_sta))
3381                 goto unlock;
3382         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3383                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3384
3385  unlock:
3386         rcu_read_unlock();
3387 }
3388
3389 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3390                                 struct ieee80211_sta *sta)
3391 {
3392         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3393         struct iwl_mvm_add_sta_cmd cmd = {
3394                 .add_modify = STA_MODE_MODIFY,
3395                 .sta_id = mvmsta->sta_id,
3396                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3397                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3398         };
3399         int ret;
3400
3401         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3402                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3403         if (ret)
3404                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3405 }
3406
3407 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3408                                        struct ieee80211_sta *sta,
3409                                        enum ieee80211_frame_release_type reason,
3410                                        u16 cnt, u16 tids, bool more_data,
3411                                        bool single_sta_queue)
3412 {
3413         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3414         struct iwl_mvm_add_sta_cmd cmd = {
3415                 .add_modify = STA_MODE_MODIFY,
3416                 .sta_id = mvmsta->sta_id,
3417                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3418                 .sleep_tx_count = cpu_to_le16(cnt),
3419                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3420         };
3421         int tid, ret;
3422         unsigned long _tids = tids;
3423
3424         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3425          * Note that this field is reserved and unused by firmware not
3426          * supporting GO uAPSD, so it's safe to always do this.
3427          */
3428         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3429                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3430
3431         /* If we're releasing frames from aggregation or dqa queues then check
3432          * if all the queues that we're releasing frames from, combined, have:
3433          *  - more frames than the service period, in which case more_data
3434          *    needs to be set
3435          *  - fewer than 'cnt' frames, in which case we need to adjust the
3436          *    firmware command (but do that unconditionally)
3437          */
3438         if (single_sta_queue) {
3439                 int remaining = cnt;
3440                 int sleep_tx_count;
3441
3442                 spin_lock_bh(&mvmsta->lock);
3443                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3444                         struct iwl_mvm_tid_data *tid_data;
3445                         u16 n_queued;
3446
3447                         tid_data = &mvmsta->tid_data[tid];
3448                         if (WARN(!iwl_mvm_is_dqa_supported(mvm) &&
3449                                  tid_data->state != IWL_AGG_ON &&
3450                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3451                                  "TID %d state is %d\n",
3452                                  tid, tid_data->state)) {
3453                                 spin_unlock_bh(&mvmsta->lock);
3454                                 ieee80211_sta_eosp(sta);
3455                                 return;
3456                         }
3457
3458                         n_queued = iwl_mvm_tid_queued(tid_data);
3459                         if (n_queued > remaining) {
3460                                 more_data = true;
3461                                 remaining = 0;
3462                                 break;
3463                         }
3464                         remaining -= n_queued;
3465                 }
3466                 sleep_tx_count = cnt - remaining;
3467                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3468                         mvmsta->sleep_tx_count = sleep_tx_count;
3469                 spin_unlock_bh(&mvmsta->lock);
3470
3471                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3472                 if (WARN_ON(cnt - remaining == 0)) {
3473                         ieee80211_sta_eosp(sta);
3474                         return;
3475                 }
3476         }
3477
3478         /* Note: this is ignored by firmware not supporting GO uAPSD */
3479         if (more_data)
3480                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3481
3482         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3483                 mvmsta->next_status_eosp = true;
3484                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3485         } else {
3486                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3487         }
3488
3489         /* block the Tx queues until the FW updated the sleep Tx count */
3490         iwl_trans_block_txq_ptrs(mvm->trans, true);
3491
3492         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3493                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3494                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3495         if (ret)
3496                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3497 }
3498
3499 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3500                            struct iwl_rx_cmd_buffer *rxb)
3501 {
3502         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3503         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3504         struct ieee80211_sta *sta;
3505         u32 sta_id = le32_to_cpu(notif->sta_id);
3506
3507         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3508                 return;
3509
3510         rcu_read_lock();
3511         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3512         if (!IS_ERR_OR_NULL(sta))
3513                 ieee80211_sta_eosp(sta);
3514         rcu_read_unlock();
3515 }
3516
3517 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3518                                    struct iwl_mvm_sta *mvmsta, bool disable)
3519 {
3520         struct iwl_mvm_add_sta_cmd cmd = {
3521                 .add_modify = STA_MODE_MODIFY,
3522                 .sta_id = mvmsta->sta_id,
3523                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3524                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3525                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3526         };
3527         int ret;
3528
3529         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3530                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3531         if (ret)
3532                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3533 }
3534
3535 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3536                                       struct ieee80211_sta *sta,
3537                                       bool disable)
3538 {
3539         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3540
3541         spin_lock_bh(&mvm_sta->lock);
3542
3543         if (mvm_sta->disable_tx == disable) {
3544                 spin_unlock_bh(&mvm_sta->lock);
3545                 return;
3546         }
3547
3548         mvm_sta->disable_tx = disable;
3549
3550         /*
3551          * Tell mac80211 to start/stop queuing tx for this station,
3552          * but don't stop queuing if there are still pending frames
3553          * for this station.
3554          */
3555         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3556                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3557
3558         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3559
3560         spin_unlock_bh(&mvm_sta->lock);
3561 }
3562
3563 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3564                                               struct iwl_mvm_vif *mvmvif,
3565                                               struct iwl_mvm_int_sta *sta,
3566                                               bool disable)
3567 {
3568         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3569         struct iwl_mvm_add_sta_cmd cmd = {
3570                 .add_modify = STA_MODE_MODIFY,
3571                 .sta_id = sta->sta_id,
3572                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3573                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3574                 .mac_id_n_color = cpu_to_le32(id),
3575         };
3576         int ret;
3577
3578         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3579                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3580         if (ret)
3581                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3582 }
3583
3584 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3585                                        struct iwl_mvm_vif *mvmvif,
3586                                        bool disable)
3587 {
3588         struct ieee80211_sta *sta;
3589         struct iwl_mvm_sta *mvm_sta;
3590         int i;
3591
3592         lockdep_assert_held(&mvm->mutex);
3593
3594         /* Block/unblock all the stations of the given mvmvif */
3595         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3596                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3597                                                 lockdep_is_held(&mvm->mutex));
3598                 if (IS_ERR_OR_NULL(sta))
3599                         continue;
3600
3601                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3602                 if (mvm_sta->mac_id_n_color !=
3603                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3604                         continue;
3605
3606                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3607         }
3608
3609         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3610                 return;
3611
3612         /* Need to block/unblock also multicast station */
3613         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3614                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3615                                                   &mvmvif->mcast_sta, disable);
3616
3617         /*
3618          * Only unblock the broadcast station (FW blocks it for immediate
3619          * quiet, not the driver)
3620          */
3621         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3622                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3623                                                   &mvmvif->bcast_sta, disable);
3624 }
3625
3626 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3627 {
3628         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3629         struct iwl_mvm_sta *mvmsta;
3630
3631         rcu_read_lock();
3632
3633         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3634
3635         if (!WARN_ON(!mvmsta))
3636                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3637
3638         rcu_read_unlock();
3639 }