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                     vif->type != NL80211_IFTYPE_ADHOC))
2125                 return -ENOTSUPP;
2126
2127         /*
2128          * While in previous FWs we had to exclude cab queue from TFD queue
2129          * mask, now it is needed as any other queue.
2130          */
2131         if (!iwl_mvm_has_new_tx_api(mvm) &&
2132             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2133                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2134                                    &cfg, timeout);
2135                 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2136         }
2137         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2138                                          mvmvif->id, mvmvif->color);
2139         if (ret) {
2140                 iwl_mvm_dealloc_int_sta(mvm, msta);
2141                 return ret;
2142         }
2143
2144         /*
2145          * Enable cab queue after the ADD_STA command is sent.
2146          * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2147          * command with unknown station id, and for FW that doesn't support
2148          * station API since the cab queue is not included in the
2149          * tfd_queue_mask.
2150          */
2151         if (iwl_mvm_has_new_tx_api(mvm)) {
2152                 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2153                                                     msta->sta_id,
2154                                                     IWL_MAX_TID_COUNT,
2155                                                     timeout);
2156                 mvmvif->cab_queue = queue;
2157         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2158                                IWL_UCODE_TLV_API_STA_TYPE)) {
2159                 /*
2160                  * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2161                  * invalid, so make sure we use the queue we want.
2162                  * Note that this is done here as we want to avoid making DQA
2163                  * changes in mac80211 layer.
2164                  */
2165                 if (vif->type == NL80211_IFTYPE_ADHOC) {
2166                         vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2167                         mvmvif->cab_queue = vif->cab_queue;
2168                 }
2169                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2170                                    &cfg, timeout);
2171         }
2172
2173         return 0;
2174 }
2175
2176 /*
2177  * Send the FW a request to remove the station from it's internal data
2178  * structures, and in addition remove it from the local data structure.
2179  */
2180 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2181 {
2182         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2183         int ret;
2184
2185         lockdep_assert_held(&mvm->mutex);
2186
2187         if (!iwl_mvm_is_dqa_supported(mvm))
2188                 return 0;
2189
2190         iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2191                             IWL_MAX_TID_COUNT, 0);
2192
2193         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2194         if (ret)
2195                 IWL_WARN(mvm, "Failed sending remove station\n");
2196
2197         return ret;
2198 }
2199
2200 #define IWL_MAX_RX_BA_SESSIONS 16
2201
2202 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2203 {
2204         struct iwl_mvm_delba_notif notif = {
2205                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2206                 .metadata.sync = 1,
2207                 .delba.baid = baid,
2208         };
2209         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2210 };
2211
2212 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2213                                  struct iwl_mvm_baid_data *data)
2214 {
2215         int i;
2216
2217         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2218
2219         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2220                 int j;
2221                 struct iwl_mvm_reorder_buffer *reorder_buf =
2222                         &data->reorder_buf[i];
2223
2224                 spin_lock_bh(&reorder_buf->lock);
2225                 if (likely(!reorder_buf->num_stored)) {
2226                         spin_unlock_bh(&reorder_buf->lock);
2227                         continue;
2228                 }
2229
2230                 /*
2231                  * This shouldn't happen in regular DELBA since the internal
2232                  * delBA notification should trigger a release of all frames in
2233                  * the reorder buffer.
2234                  */
2235                 WARN_ON(1);
2236
2237                 for (j = 0; j < reorder_buf->buf_size; j++)
2238                         __skb_queue_purge(&reorder_buf->entries[j]);
2239                 /*
2240                  * Prevent timer re-arm. This prevents a very far fetched case
2241                  * where we timed out on the notification. There may be prior
2242                  * RX frames pending in the RX queue before the notification
2243                  * that might get processed between now and the actual deletion
2244                  * and we would re-arm the timer although we are deleting the
2245                  * reorder buffer.
2246                  */
2247                 reorder_buf->removed = true;
2248                 spin_unlock_bh(&reorder_buf->lock);
2249                 del_timer_sync(&reorder_buf->reorder_timer);
2250         }
2251 }
2252
2253 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2254                                         u32 sta_id,
2255                                         struct iwl_mvm_baid_data *data,
2256                                         u16 ssn, u8 buf_size)
2257 {
2258         int i;
2259
2260         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2261                 struct iwl_mvm_reorder_buffer *reorder_buf =
2262                         &data->reorder_buf[i];
2263                 int j;
2264
2265                 reorder_buf->num_stored = 0;
2266                 reorder_buf->head_sn = ssn;
2267                 reorder_buf->buf_size = buf_size;
2268                 /* rx reorder timer */
2269                 reorder_buf->reorder_timer.function =
2270                         iwl_mvm_reorder_timer_expired;
2271                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2272                 init_timer(&reorder_buf->reorder_timer);
2273                 spin_lock_init(&reorder_buf->lock);
2274                 reorder_buf->mvm = mvm;
2275                 reorder_buf->queue = i;
2276                 reorder_buf->sta_id = sta_id;
2277                 reorder_buf->valid = false;
2278                 for (j = 0; j < reorder_buf->buf_size; j++)
2279                         __skb_queue_head_init(&reorder_buf->entries[j]);
2280         }
2281 }
2282
2283 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2284                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2285 {
2286         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2287         struct iwl_mvm_add_sta_cmd cmd = {};
2288         struct iwl_mvm_baid_data *baid_data = NULL;
2289         int ret;
2290         u32 status;
2291
2292         lockdep_assert_held(&mvm->mutex);
2293
2294         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2295                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2296                 return -ENOSPC;
2297         }
2298
2299         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2300                 /*
2301                  * Allocate here so if allocation fails we can bail out early
2302                  * before starting the BA session in the firmware
2303                  */
2304                 baid_data = kzalloc(sizeof(*baid_data) +
2305                                     mvm->trans->num_rx_queues *
2306                                     sizeof(baid_data->reorder_buf[0]),
2307                                     GFP_KERNEL);
2308                 if (!baid_data)
2309                         return -ENOMEM;
2310         }
2311
2312         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2313         cmd.sta_id = mvm_sta->sta_id;
2314         cmd.add_modify = STA_MODE_MODIFY;
2315         if (start) {
2316                 cmd.add_immediate_ba_tid = (u8) tid;
2317                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2318                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2319         } else {
2320                 cmd.remove_immediate_ba_tid = (u8) tid;
2321         }
2322         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2323                                   STA_MODIFY_REMOVE_BA_TID;
2324
2325         status = ADD_STA_SUCCESS;
2326         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2327                                           iwl_mvm_add_sta_cmd_size(mvm),
2328                                           &cmd, &status);
2329         if (ret)
2330                 goto out_free;
2331
2332         switch (status & IWL_ADD_STA_STATUS_MASK) {
2333         case ADD_STA_SUCCESS:
2334                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2335                              start ? "start" : "stopp");
2336                 break;
2337         case ADD_STA_IMMEDIATE_BA_FAILURE:
2338                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2339                 ret = -ENOSPC;
2340                 break;
2341         default:
2342                 ret = -EIO;
2343                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2344                         start ? "start" : "stopp", status);
2345                 break;
2346         }
2347
2348         if (ret)
2349                 goto out_free;
2350
2351         if (start) {
2352                 u8 baid;
2353
2354                 mvm->rx_ba_sessions++;
2355
2356                 if (!iwl_mvm_has_new_rx_api(mvm))
2357                         return 0;
2358
2359                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2360                         ret = -EINVAL;
2361                         goto out_free;
2362                 }
2363                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2364                             IWL_ADD_STA_BAID_SHIFT);
2365                 baid_data->baid = baid;
2366                 baid_data->timeout = timeout;
2367                 baid_data->last_rx = jiffies;
2368                 setup_timer(&baid_data->session_timer,
2369                             iwl_mvm_rx_agg_session_expired,
2370                             (unsigned long)&mvm->baid_map[baid]);
2371                 baid_data->mvm = mvm;
2372                 baid_data->tid = tid;
2373                 baid_data->sta_id = mvm_sta->sta_id;
2374
2375                 mvm_sta->tid_to_baid[tid] = baid;
2376                 if (timeout)
2377                         mod_timer(&baid_data->session_timer,
2378                                   TU_TO_EXP_TIME(timeout * 2));
2379
2380                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2381                                             baid_data, ssn, buf_size);
2382                 /*
2383                  * protect the BA data with RCU to cover a case where our
2384                  * internal RX sync mechanism will timeout (not that it's
2385                  * supposed to happen) and we will free the session data while
2386                  * RX is being processed in parallel
2387                  */
2388                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2389                              mvm_sta->sta_id, tid, baid);
2390                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2391                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2392         } else  {
2393                 u8 baid = mvm_sta->tid_to_baid[tid];
2394
2395                 if (mvm->rx_ba_sessions > 0)
2396                         /* check that restart flow didn't zero the counter */
2397                         mvm->rx_ba_sessions--;
2398                 if (!iwl_mvm_has_new_rx_api(mvm))
2399                         return 0;
2400
2401                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2402                         return -EINVAL;
2403
2404                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2405                 if (WARN_ON(!baid_data))
2406                         return -EINVAL;
2407
2408                 /* synchronize all rx queues so we can safely delete */
2409                 iwl_mvm_free_reorder(mvm, baid_data);
2410                 del_timer_sync(&baid_data->session_timer);
2411                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2412                 kfree_rcu(baid_data, rcu_head);
2413                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2414         }
2415         return 0;
2416
2417 out_free:
2418         kfree(baid_data);
2419         return ret;
2420 }
2421
2422 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2423                        int tid, u8 queue, bool start)
2424 {
2425         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2426         struct iwl_mvm_add_sta_cmd cmd = {};
2427         int ret;
2428         u32 status;
2429
2430         lockdep_assert_held(&mvm->mutex);
2431
2432         if (start) {
2433                 mvm_sta->tfd_queue_msk |= BIT(queue);
2434                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2435         } else {
2436                 /* In DQA-mode the queue isn't removed on agg termination */
2437                 if (!iwl_mvm_is_dqa_supported(mvm))
2438                         mvm_sta->tfd_queue_msk &= ~BIT(queue);
2439                 mvm_sta->tid_disable_agg |= BIT(tid);
2440         }
2441
2442         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2443         cmd.sta_id = mvm_sta->sta_id;
2444         cmd.add_modify = STA_MODE_MODIFY;
2445         if (!iwl_mvm_has_new_tx_api(mvm))
2446                 cmd.modify_mask = STA_MODIFY_QUEUES;
2447         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2448         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2449         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2450
2451         status = ADD_STA_SUCCESS;
2452         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2453                                           iwl_mvm_add_sta_cmd_size(mvm),
2454                                           &cmd, &status);
2455         if (ret)
2456                 return ret;
2457
2458         switch (status & IWL_ADD_STA_STATUS_MASK) {
2459         case ADD_STA_SUCCESS:
2460                 break;
2461         default:
2462                 ret = -EIO;
2463                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2464                         start ? "start" : "stopp", status);
2465                 break;
2466         }
2467
2468         return ret;
2469 }
2470
2471 const u8 tid_to_mac80211_ac[] = {
2472         IEEE80211_AC_BE,
2473         IEEE80211_AC_BK,
2474         IEEE80211_AC_BK,
2475         IEEE80211_AC_BE,
2476         IEEE80211_AC_VI,
2477         IEEE80211_AC_VI,
2478         IEEE80211_AC_VO,
2479         IEEE80211_AC_VO,
2480         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2481 };
2482
2483 static const u8 tid_to_ucode_ac[] = {
2484         AC_BE,
2485         AC_BK,
2486         AC_BK,
2487         AC_BE,
2488         AC_VI,
2489         AC_VI,
2490         AC_VO,
2491         AC_VO,
2492 };
2493
2494 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2495                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2496 {
2497         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2498         struct iwl_mvm_tid_data *tid_data;
2499         int txq_id;
2500         int ret;
2501
2502         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2503                 return -EINVAL;
2504
2505         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2506                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2507                         mvmsta->tid_data[tid].state);
2508                 return -ENXIO;
2509         }
2510
2511         lockdep_assert_held(&mvm->mutex);
2512
2513         spin_lock_bh(&mvmsta->lock);
2514
2515         /* possible race condition - we entered D0i3 while starting agg */
2516         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2517                 spin_unlock_bh(&mvmsta->lock);
2518                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2519                 return -EIO;
2520         }
2521
2522         spin_lock(&mvm->queue_info_lock);
2523
2524         /*
2525          * Note the possible cases:
2526          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2527          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2528          *      one and mark it as reserved
2529          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2530          *      non-DQA mode, since the TXQ hasn't yet been allocated
2531          * Don't support case 3 for new TX path as it is not expected to happen
2532          * and aggregation will be offloaded soon anyway
2533          */
2534         txq_id = mvmsta->tid_data[tid].txq_id;
2535         if (iwl_mvm_has_new_tx_api(mvm)) {
2536                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2537                         ret = -ENXIO;
2538                         goto release_locks;
2539                 }
2540         } else if (iwl_mvm_is_dqa_supported(mvm) &&
2541                    unlikely(mvm->queue_info[txq_id].status ==
2542                             IWL_MVM_QUEUE_SHARED)) {
2543                 ret = -ENXIO;
2544                 IWL_DEBUG_TX_QUEUES(mvm,
2545                                     "Can't start tid %d agg on shared queue!\n",
2546                                     tid);
2547                 goto release_locks;
2548         } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2549             mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2550                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2551                                                  mvm->first_agg_queue,
2552                                                  mvm->last_agg_queue);
2553                 if (txq_id < 0) {
2554                         ret = txq_id;
2555                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2556                         goto release_locks;
2557                 }
2558                 /*
2559                  * TXQ shouldn't be in inactive mode for non-DQA, so getting
2560                  * an inactive queue from iwl_mvm_find_free_queue() is
2561                  * certainly a bug
2562                  */
2563                 WARN_ON(mvm->queue_info[txq_id].status ==
2564                         IWL_MVM_QUEUE_INACTIVE);
2565
2566                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2567                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2568         }
2569
2570         spin_unlock(&mvm->queue_info_lock);
2571
2572         IWL_DEBUG_TX_QUEUES(mvm,
2573                             "AGG for tid %d will be on queue #%d\n",
2574                             tid, txq_id);
2575
2576         tid_data = &mvmsta->tid_data[tid];
2577         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2578         tid_data->txq_id = txq_id;
2579         *ssn = tid_data->ssn;
2580
2581         IWL_DEBUG_TX_QUEUES(mvm,
2582                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2583                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2584                             tid_data->next_reclaimed);
2585
2586         if (tid_data->ssn == tid_data->next_reclaimed) {
2587                 tid_data->state = IWL_AGG_STARTING;
2588                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2589         } else {
2590                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2591         }
2592
2593         ret = 0;
2594         goto out;
2595
2596 release_locks:
2597         spin_unlock(&mvm->queue_info_lock);
2598 out:
2599         spin_unlock_bh(&mvmsta->lock);
2600
2601         return ret;
2602 }
2603
2604 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2605                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2606                             bool amsdu)
2607 {
2608         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2609         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2610         unsigned int wdg_timeout =
2611                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2612         int queue, ret;
2613         bool alloc_queue = true;
2614         enum iwl_mvm_queue_status queue_status;
2615         u16 ssn;
2616
2617         struct iwl_trans_txq_scd_cfg cfg = {
2618                 .sta_id = mvmsta->sta_id,
2619                 .tid = tid,
2620                 .frame_limit = buf_size,
2621                 .aggregate = true,
2622         };
2623
2624         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2625                      != IWL_MAX_TID_COUNT);
2626
2627         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2628
2629         spin_lock_bh(&mvmsta->lock);
2630         ssn = tid_data->ssn;
2631         queue = tid_data->txq_id;
2632         tid_data->state = IWL_AGG_ON;
2633         mvmsta->agg_tids |= BIT(tid);
2634         tid_data->ssn = 0xffff;
2635         tid_data->amsdu_in_ampdu_allowed = amsdu;
2636         spin_unlock_bh(&mvmsta->lock);
2637
2638         if (iwl_mvm_has_new_tx_api(mvm)) {
2639                 /*
2640                  * If no queue iwl_mvm_sta_tx_agg_start() would have failed so
2641                  * no need to check queue's status
2642                  */
2643                 if (buf_size < mvmsta->max_agg_bufsize)
2644                         return -ENOTSUPP;
2645
2646                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2647                 if (ret)
2648                         return -EIO;
2649                 goto out;
2650         }
2651
2652         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2653
2654         spin_lock_bh(&mvm->queue_info_lock);
2655         queue_status = mvm->queue_info[queue].status;
2656         spin_unlock_bh(&mvm->queue_info_lock);
2657
2658         /* In DQA mode, the existing queue might need to be reconfigured */
2659         if (iwl_mvm_is_dqa_supported(mvm)) {
2660                 /* Maybe there is no need to even alloc a queue... */
2661                 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2662                         alloc_queue = false;
2663
2664                 /*
2665                  * Only reconfig the SCD for the queue if the window size has
2666                  * changed from current (become smaller)
2667                  */
2668                 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2669                         /*
2670                          * If reconfiguring an existing queue, it first must be
2671                          * drained
2672                          */
2673                         ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2674                                                              BIT(queue));
2675                         if (ret) {
2676                                 IWL_ERR(mvm,
2677                                         "Error draining queue before reconfig\n");
2678                                 return ret;
2679                         }
2680
2681                         ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2682                                                    mvmsta->sta_id, tid,
2683                                                    buf_size, ssn);
2684                         if (ret) {
2685                                 IWL_ERR(mvm,
2686                                         "Error reconfiguring TXQ #%d\n", queue);
2687                                 return ret;
2688                         }
2689                 }
2690         }
2691
2692         if (alloc_queue)
2693                 iwl_mvm_enable_txq(mvm, queue,
2694                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2695                                    &cfg, wdg_timeout);
2696
2697         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2698         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2699                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2700                 if (ret)
2701                         return -EIO;
2702         }
2703
2704         /* No need to mark as reserved */
2705         spin_lock_bh(&mvm->queue_info_lock);
2706         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2707         spin_unlock_bh(&mvm->queue_info_lock);
2708
2709 out:
2710         /*
2711          * Even though in theory the peer could have different
2712          * aggregation reorder buffer sizes for different sessions,
2713          * our ucode doesn't allow for that and has a global limit
2714          * for each station. Therefore, use the minimum of all the
2715          * aggregation sessions and our default value.
2716          */
2717         mvmsta->max_agg_bufsize =
2718                 min(mvmsta->max_agg_bufsize, buf_size);
2719         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2720
2721         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2722                      sta->addr, tid);
2723
2724         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2725 }
2726
2727 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2728                                         struct iwl_mvm_sta *mvmsta,
2729                                         u16 txq_id)
2730 {
2731         if (iwl_mvm_has_new_tx_api(mvm))
2732                 return;
2733
2734         spin_lock_bh(&mvm->queue_info_lock);
2735         /*
2736          * The TXQ is marked as reserved only if no traffic came through yet
2737          * This means no traffic has been sent on this TID (agg'd or not), so
2738          * we no longer have use for the queue. Since it hasn't even been
2739          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2740          * free.
2741          */
2742         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2743                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2744
2745         spin_unlock_bh(&mvm->queue_info_lock);
2746 }
2747
2748 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2749                             struct ieee80211_sta *sta, u16 tid)
2750 {
2751         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2752         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2753         u16 txq_id;
2754         int err;
2755
2756         /*
2757          * If mac80211 is cleaning its state, then say that we finished since
2758          * our state has been cleared anyway.
2759          */
2760         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2761                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2762                 return 0;
2763         }
2764
2765         spin_lock_bh(&mvmsta->lock);
2766
2767         txq_id = tid_data->txq_id;
2768
2769         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2770                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2771
2772         mvmsta->agg_tids &= ~BIT(tid);
2773
2774         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2775
2776         switch (tid_data->state) {
2777         case IWL_AGG_ON:
2778                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2779
2780                 IWL_DEBUG_TX_QUEUES(mvm,
2781                                     "ssn = %d, next_recl = %d\n",
2782                                     tid_data->ssn, tid_data->next_reclaimed);
2783
2784                 /* There are still packets for this RA / TID in the HW */
2785                 if (tid_data->ssn != tid_data->next_reclaimed) {
2786                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2787                         err = 0;
2788                         break;
2789                 }
2790
2791                 tid_data->ssn = 0xffff;
2792                 tid_data->state = IWL_AGG_OFF;
2793                 spin_unlock_bh(&mvmsta->lock);
2794
2795                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2796
2797                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2798
2799                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2800                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2801
2802                         iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2803                 }
2804                 return 0;
2805         case IWL_AGG_STARTING:
2806         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2807                 /*
2808                  * The agg session has been stopped before it was set up. This
2809                  * can happen when the AddBA timer times out for example.
2810                  */
2811
2812                 /* No barriers since we are under mutex */
2813                 lockdep_assert_held(&mvm->mutex);
2814
2815                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2816                 tid_data->state = IWL_AGG_OFF;
2817                 err = 0;
2818                 break;
2819         default:
2820                 IWL_ERR(mvm,
2821                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2822                         mvmsta->sta_id, tid, tid_data->state);
2823                 IWL_ERR(mvm,
2824                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2825                 err = -EINVAL;
2826         }
2827
2828         spin_unlock_bh(&mvmsta->lock);
2829
2830         return err;
2831 }
2832
2833 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2834                             struct ieee80211_sta *sta, u16 tid)
2835 {
2836         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2837         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2838         u16 txq_id;
2839         enum iwl_mvm_agg_state old_state;
2840
2841         /*
2842          * First set the agg state to OFF to avoid calling
2843          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2844          */
2845         spin_lock_bh(&mvmsta->lock);
2846         txq_id = tid_data->txq_id;
2847         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2848                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2849         old_state = tid_data->state;
2850         tid_data->state = IWL_AGG_OFF;
2851         mvmsta->agg_tids &= ~BIT(tid);
2852         spin_unlock_bh(&mvmsta->lock);
2853
2854         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2855
2856         if (old_state >= IWL_AGG_ON) {
2857                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2858                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2859                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2860                 iwl_trans_wait_tx_queues_empty(mvm->trans,
2861                                                mvmsta->tfd_queue_msk);
2862                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2863
2864                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2865
2866                 if (!iwl_mvm_is_dqa_supported(mvm)) {
2867                         int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2868
2869                         iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2870                                             tid, 0);
2871                 }
2872         }
2873
2874         return 0;
2875 }
2876
2877 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2878 {
2879         int i, max = -1, max_offs = -1;
2880
2881         lockdep_assert_held(&mvm->mutex);
2882
2883         /* Pick the unused key offset with the highest 'deleted'
2884          * counter. Every time a key is deleted, all the counters
2885          * are incremented and the one that was just deleted is
2886          * reset to zero. Thus, the highest counter is the one
2887          * that was deleted longest ago. Pick that one.
2888          */
2889         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2890                 if (test_bit(i, mvm->fw_key_table))
2891                         continue;
2892                 if (mvm->fw_key_deleted[i] > max) {
2893                         max = mvm->fw_key_deleted[i];
2894                         max_offs = i;
2895                 }
2896         }
2897
2898         if (max_offs < 0)
2899                 return STA_KEY_IDX_INVALID;
2900
2901         return max_offs;
2902 }
2903
2904 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2905                                                struct ieee80211_vif *vif,
2906                                                struct ieee80211_sta *sta)
2907 {
2908         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2909
2910         if (sta)
2911                 return iwl_mvm_sta_from_mac80211(sta);
2912
2913         /*
2914          * The device expects GTKs for station interfaces to be
2915          * installed as GTKs for the AP station. If we have no
2916          * station ID, then use AP's station ID.
2917          */
2918         if (vif->type == NL80211_IFTYPE_STATION &&
2919             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2920                 u8 sta_id = mvmvif->ap_sta_id;
2921
2922                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2923                                             lockdep_is_held(&mvm->mutex));
2924
2925                 /*
2926                  * It is possible that the 'sta' parameter is NULL,
2927                  * for example when a GTK is removed - the sta_id will then
2928                  * be the AP ID, and no station was passed by mac80211.
2929                  */
2930                 if (IS_ERR_OR_NULL(sta))
2931                         return NULL;
2932
2933                 return iwl_mvm_sta_from_mac80211(sta);
2934         }
2935
2936         return NULL;
2937 }
2938
2939 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2940                                 struct iwl_mvm_sta *mvm_sta,
2941                                 struct ieee80211_key_conf *key, bool mcast,
2942                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2943                                 u8 key_offset)
2944 {
2945         union {
2946                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2947                 struct iwl_mvm_add_sta_key_cmd cmd;
2948         } u = {};
2949         __le16 key_flags;
2950         int ret;
2951         u32 status;
2952         u16 keyidx;
2953         u64 pn = 0;
2954         int i, size;
2955         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2956                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2957
2958         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2959                  STA_KEY_FLG_KEYID_MSK;
2960         key_flags = cpu_to_le16(keyidx);
2961         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2962
2963         switch (key->cipher) {
2964         case WLAN_CIPHER_SUITE_TKIP:
2965                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2966                 if (new_api) {
2967                         memcpy((void *)&u.cmd.tx_mic_key,
2968                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2969                                IWL_MIC_KEY_SIZE);
2970
2971                         memcpy((void *)&u.cmd.rx_mic_key,
2972                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2973                                IWL_MIC_KEY_SIZE);
2974                         pn = atomic64_read(&key->tx_pn);
2975
2976                 } else {
2977                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2978                         for (i = 0; i < 5; i++)
2979                                 u.cmd_v1.tkip_rx_ttak[i] =
2980                                         cpu_to_le16(tkip_p1k[i]);
2981                 }
2982                 memcpy(u.cmd.common.key, key->key, key->keylen);
2983                 break;
2984         case WLAN_CIPHER_SUITE_CCMP:
2985                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2986                 memcpy(u.cmd.common.key, key->key, key->keylen);
2987                 if (new_api)
2988                         pn = atomic64_read(&key->tx_pn);
2989                 break;
2990         case WLAN_CIPHER_SUITE_WEP104:
2991                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2992                 /* fall through */
2993         case WLAN_CIPHER_SUITE_WEP40:
2994                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2995                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2996                 break;
2997         case WLAN_CIPHER_SUITE_GCMP_256:
2998                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2999                 /* fall through */
3000         case WLAN_CIPHER_SUITE_GCMP:
3001                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3002                 memcpy(u.cmd.common.key, key->key, key->keylen);
3003                 if (new_api)
3004                         pn = atomic64_read(&key->tx_pn);
3005                 break;
3006         default:
3007                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3008                 memcpy(u.cmd.common.key, key->key, key->keylen);
3009         }
3010
3011         if (mcast)
3012                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3013
3014         u.cmd.common.key_offset = key_offset;
3015         u.cmd.common.key_flags = key_flags;
3016         u.cmd.common.sta_id = mvm_sta->sta_id;
3017
3018         if (new_api) {
3019                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3020                 size = sizeof(u.cmd);
3021         } else {
3022                 size = sizeof(u.cmd_v1);
3023         }
3024
3025         status = ADD_STA_SUCCESS;
3026         if (cmd_flags & CMD_ASYNC)
3027                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3028                                            &u.cmd);
3029         else
3030                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3031                                                   &u.cmd, &status);
3032
3033         switch (status) {
3034         case ADD_STA_SUCCESS:
3035                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3036                 break;
3037         default:
3038                 ret = -EIO;
3039                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3040                 break;
3041         }
3042
3043         return ret;
3044 }
3045
3046 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3047                                  struct ieee80211_key_conf *keyconf,
3048                                  u8 sta_id, bool remove_key)
3049 {
3050         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3051
3052         /* verify the key details match the required command's expectations */
3053         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3054                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3055                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3056                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3057                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3058                 return -EINVAL;
3059
3060         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3061                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3062                 return -EINVAL;
3063
3064         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3065         igtk_cmd.sta_id = cpu_to_le32(sta_id);
3066
3067         if (remove_key) {
3068                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3069         } else {
3070                 struct ieee80211_key_seq seq;
3071                 const u8 *pn;
3072
3073                 switch (keyconf->cipher) {
3074                 case WLAN_CIPHER_SUITE_AES_CMAC:
3075                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3076                         break;
3077                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3078                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3079                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3080                         break;
3081                 default:
3082                         return -EINVAL;
3083                 }
3084
3085                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3086                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3087                         igtk_cmd.ctrl_flags |=
3088                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3089                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3090                 pn = seq.aes_cmac.pn;
3091                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3092                                                        ((u64) pn[4] << 8) |
3093                                                        ((u64) pn[3] << 16) |
3094                                                        ((u64) pn[2] << 24) |
3095                                                        ((u64) pn[1] << 32) |
3096                                                        ((u64) pn[0] << 40));
3097         }
3098
3099         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3100                        remove_key ? "removing" : "installing",
3101                        igtk_cmd.sta_id);
3102
3103         if (!iwl_mvm_has_new_rx_api(mvm)) {
3104                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3105                         .ctrl_flags = igtk_cmd.ctrl_flags,
3106                         .key_id = igtk_cmd.key_id,
3107                         .sta_id = igtk_cmd.sta_id,
3108                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3109                 };
3110
3111                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3112                        ARRAY_SIZE(igtk_cmd_v1.igtk));
3113                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3114                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3115         }
3116         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3117                                     sizeof(igtk_cmd), &igtk_cmd);
3118 }
3119
3120
3121 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3122                                        struct ieee80211_vif *vif,
3123                                        struct ieee80211_sta *sta)
3124 {
3125         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3126
3127         if (sta)
3128                 return sta->addr;
3129
3130         if (vif->type == NL80211_IFTYPE_STATION &&
3131             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3132                 u8 sta_id = mvmvif->ap_sta_id;
3133                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3134                                                 lockdep_is_held(&mvm->mutex));
3135                 return sta->addr;
3136         }
3137
3138
3139         return NULL;
3140 }
3141
3142 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3143                                  struct ieee80211_vif *vif,
3144                                  struct ieee80211_sta *sta,
3145                                  struct ieee80211_key_conf *keyconf,
3146                                  u8 key_offset,
3147                                  bool mcast)
3148 {
3149         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3150         int ret;
3151         const u8 *addr;
3152         struct ieee80211_key_seq seq;
3153         u16 p1k[5];
3154
3155         switch (keyconf->cipher) {
3156         case WLAN_CIPHER_SUITE_TKIP:
3157                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3158                 /* get phase 1 key from mac80211 */
3159                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3160                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3161                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3162                                            seq.tkip.iv32, p1k, 0, key_offset);
3163                 break;
3164         case WLAN_CIPHER_SUITE_CCMP:
3165         case WLAN_CIPHER_SUITE_WEP40:
3166         case WLAN_CIPHER_SUITE_WEP104:
3167         case WLAN_CIPHER_SUITE_GCMP:
3168         case WLAN_CIPHER_SUITE_GCMP_256:
3169                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3170                                            0, NULL, 0, key_offset);
3171                 break;
3172         default:
3173                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3174                                            0, NULL, 0, key_offset);
3175         }
3176
3177         return ret;
3178 }
3179
3180 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3181                                     struct ieee80211_key_conf *keyconf,
3182                                     bool mcast)
3183 {
3184         union {
3185                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3186                 struct iwl_mvm_add_sta_key_cmd cmd;
3187         } u = {};
3188         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3189                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3190         __le16 key_flags;
3191         int ret, size;
3192         u32 status;
3193
3194         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3195                                  STA_KEY_FLG_KEYID_MSK);
3196         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3197         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3198
3199         if (mcast)
3200                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3201
3202         /*
3203          * The fields assigned here are in the same location at the start
3204          * of the command, so we can do this union trick.
3205          */
3206         u.cmd.common.key_flags = key_flags;
3207         u.cmd.common.key_offset = keyconf->hw_key_idx;
3208         u.cmd.common.sta_id = sta_id;
3209
3210         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3211
3212         status = ADD_STA_SUCCESS;
3213         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3214                                           &status);
3215
3216         switch (status) {
3217         case ADD_STA_SUCCESS:
3218                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3219                 break;
3220         default:
3221                 ret = -EIO;
3222                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3223                 break;
3224         }
3225
3226         return ret;
3227 }
3228
3229 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3230                         struct ieee80211_vif *vif,
3231                         struct ieee80211_sta *sta,
3232                         struct ieee80211_key_conf *keyconf,
3233                         u8 key_offset)
3234 {
3235         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3236         struct iwl_mvm_sta *mvm_sta;
3237         u8 sta_id;
3238         int ret;
3239         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3240
3241         lockdep_assert_held(&mvm->mutex);
3242
3243         /* Get the station id from the mvm local station table */
3244         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3245         if (!mvm_sta) {
3246                 IWL_ERR(mvm, "Failed to find station\n");
3247                 return -EINVAL;
3248         }
3249         sta_id = mvm_sta->sta_id;
3250
3251         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3252             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3253             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3254                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3255                 goto end;
3256         }
3257
3258         /*
3259          * It is possible that the 'sta' parameter is NULL, and thus
3260          * there is a need to retrieve  the sta from the local station table.
3261          */
3262         if (!sta) {
3263                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3264                                                 lockdep_is_held(&mvm->mutex));
3265                 if (IS_ERR_OR_NULL(sta)) {
3266                         IWL_ERR(mvm, "Invalid station id\n");
3267                         return -EINVAL;
3268                 }
3269         }
3270
3271         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3272                 return -EINVAL;
3273
3274         /* If the key_offset is not pre-assigned, we need to find a
3275          * new offset to use.  In normal cases, the offset is not
3276          * pre-assigned, but during HW_RESTART we want to reuse the
3277          * same indices, so we pass them when this function is called.
3278          *
3279          * In D3 entry, we need to hardcoded the indices (because the
3280          * firmware hardcodes the PTK offset to 0).  In this case, we
3281          * need to make sure we don't overwrite the hw_key_idx in the
3282          * keyconf structure, because otherwise we cannot configure
3283          * the original ones back when resuming.
3284          */
3285         if (key_offset == STA_KEY_IDX_INVALID) {
3286                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3287                 if (key_offset == STA_KEY_IDX_INVALID)
3288                         return -ENOSPC;
3289                 keyconf->hw_key_idx = key_offset;
3290         }
3291
3292         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3293         if (ret)
3294                 goto end;
3295
3296         /*
3297          * For WEP, the same key is used for multicast and unicast. Upload it
3298          * again, using the same key offset, and now pointing the other one
3299          * to the same key slot (offset).
3300          * If this fails, remove the original as well.
3301          */
3302         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3303             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
3304                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3305                                             key_offset, !mcast);
3306                 if (ret) {
3307                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3308                         goto end;
3309                 }
3310         }
3311
3312         __set_bit(key_offset, mvm->fw_key_table);
3313
3314 end:
3315         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3316                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3317                       sta ? sta->addr : zero_addr, ret);
3318         return ret;
3319 }
3320
3321 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3322                            struct ieee80211_vif *vif,
3323                            struct ieee80211_sta *sta,
3324                            struct ieee80211_key_conf *keyconf)
3325 {
3326         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3327         struct iwl_mvm_sta *mvm_sta;
3328         u8 sta_id = IWL_MVM_INVALID_STA;
3329         int ret, i;
3330
3331         lockdep_assert_held(&mvm->mutex);
3332
3333         /* Get the station from the mvm local station table */
3334         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3335         if (mvm_sta)
3336                 sta_id = mvm_sta->sta_id;
3337
3338         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3339                       keyconf->keyidx, sta_id);
3340
3341         if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3342                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3343                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3344                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3345
3346         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3347                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3348                         keyconf->hw_key_idx);
3349                 return -ENOENT;
3350         }
3351
3352         /* track which key was deleted last */
3353         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3354                 if (mvm->fw_key_deleted[i] < U8_MAX)
3355                         mvm->fw_key_deleted[i]++;
3356         }
3357         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3358
3359         if (!mvm_sta) {
3360                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3361                 return 0;
3362         }
3363
3364         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3365         if (ret)
3366                 return ret;
3367
3368         /* delete WEP key twice to get rid of (now useless) offset */
3369         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3370             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3371                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3372
3373         return ret;
3374 }
3375
3376 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3377                              struct ieee80211_vif *vif,
3378                              struct ieee80211_key_conf *keyconf,
3379                              struct ieee80211_sta *sta, u32 iv32,
3380                              u16 *phase1key)
3381 {
3382         struct iwl_mvm_sta *mvm_sta;
3383         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3384
3385         rcu_read_lock();
3386
3387         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3388         if (WARN_ON_ONCE(!mvm_sta))
3389                 goto unlock;
3390         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3391                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3392
3393  unlock:
3394         rcu_read_unlock();
3395 }
3396
3397 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3398                                 struct ieee80211_sta *sta)
3399 {
3400         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3401         struct iwl_mvm_add_sta_cmd cmd = {
3402                 .add_modify = STA_MODE_MODIFY,
3403                 .sta_id = mvmsta->sta_id,
3404                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3405                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3406         };
3407         int ret;
3408
3409         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3410                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3411         if (ret)
3412                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3413 }
3414
3415 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3416                                        struct ieee80211_sta *sta,
3417                                        enum ieee80211_frame_release_type reason,
3418                                        u16 cnt, u16 tids, bool more_data,
3419                                        bool single_sta_queue)
3420 {
3421         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3422         struct iwl_mvm_add_sta_cmd cmd = {
3423                 .add_modify = STA_MODE_MODIFY,
3424                 .sta_id = mvmsta->sta_id,
3425                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3426                 .sleep_tx_count = cpu_to_le16(cnt),
3427                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3428         };
3429         int tid, ret;
3430         unsigned long _tids = tids;
3431
3432         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3433          * Note that this field is reserved and unused by firmware not
3434          * supporting GO uAPSD, so it's safe to always do this.
3435          */
3436         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3437                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3438
3439         /* If we're releasing frames from aggregation or dqa queues then check
3440          * if all the queues that we're releasing frames from, combined, have:
3441          *  - more frames than the service period, in which case more_data
3442          *    needs to be set
3443          *  - fewer than 'cnt' frames, in which case we need to adjust the
3444          *    firmware command (but do that unconditionally)
3445          */
3446         if (single_sta_queue) {
3447                 int remaining = cnt;
3448                 int sleep_tx_count;
3449
3450                 spin_lock_bh(&mvmsta->lock);
3451                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3452                         struct iwl_mvm_tid_data *tid_data;
3453                         u16 n_queued;
3454
3455                         tid_data = &mvmsta->tid_data[tid];
3456                         if (WARN(!iwl_mvm_is_dqa_supported(mvm) &&
3457                                  tid_data->state != IWL_AGG_ON &&
3458                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3459                                  "TID %d state is %d\n",
3460                                  tid, tid_data->state)) {
3461                                 spin_unlock_bh(&mvmsta->lock);
3462                                 ieee80211_sta_eosp(sta);
3463                                 return;
3464                         }
3465
3466                         n_queued = iwl_mvm_tid_queued(tid_data);
3467                         if (n_queued > remaining) {
3468                                 more_data = true;
3469                                 remaining = 0;
3470                                 break;
3471                         }
3472                         remaining -= n_queued;
3473                 }
3474                 sleep_tx_count = cnt - remaining;
3475                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3476                         mvmsta->sleep_tx_count = sleep_tx_count;
3477                 spin_unlock_bh(&mvmsta->lock);
3478
3479                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3480                 if (WARN_ON(cnt - remaining == 0)) {
3481                         ieee80211_sta_eosp(sta);
3482                         return;
3483                 }
3484         }
3485
3486         /* Note: this is ignored by firmware not supporting GO uAPSD */
3487         if (more_data)
3488                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3489
3490         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3491                 mvmsta->next_status_eosp = true;
3492                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3493         } else {
3494                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3495         }
3496
3497         /* block the Tx queues until the FW updated the sleep Tx count */
3498         iwl_trans_block_txq_ptrs(mvm->trans, true);
3499
3500         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3501                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3502                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3503         if (ret)
3504                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3505 }
3506
3507 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3508                            struct iwl_rx_cmd_buffer *rxb)
3509 {
3510         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3511         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3512         struct ieee80211_sta *sta;
3513         u32 sta_id = le32_to_cpu(notif->sta_id);
3514
3515         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3516                 return;
3517
3518         rcu_read_lock();
3519         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3520         if (!IS_ERR_OR_NULL(sta))
3521                 ieee80211_sta_eosp(sta);
3522         rcu_read_unlock();
3523 }
3524
3525 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3526                                    struct iwl_mvm_sta *mvmsta, bool disable)
3527 {
3528         struct iwl_mvm_add_sta_cmd cmd = {
3529                 .add_modify = STA_MODE_MODIFY,
3530                 .sta_id = mvmsta->sta_id,
3531                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3532                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3533                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3534         };
3535         int ret;
3536
3537         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3538                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3539         if (ret)
3540                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3541 }
3542
3543 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3544                                       struct ieee80211_sta *sta,
3545                                       bool disable)
3546 {
3547         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3548
3549         spin_lock_bh(&mvm_sta->lock);
3550
3551         if (mvm_sta->disable_tx == disable) {
3552                 spin_unlock_bh(&mvm_sta->lock);
3553                 return;
3554         }
3555
3556         mvm_sta->disable_tx = disable;
3557
3558         /*
3559          * Tell mac80211 to start/stop queuing tx for this station,
3560          * but don't stop queuing if there are still pending frames
3561          * for this station.
3562          */
3563         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3564                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3565
3566         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3567
3568         spin_unlock_bh(&mvm_sta->lock);
3569 }
3570
3571 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3572                                               struct iwl_mvm_vif *mvmvif,
3573                                               struct iwl_mvm_int_sta *sta,
3574                                               bool disable)
3575 {
3576         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3577         struct iwl_mvm_add_sta_cmd cmd = {
3578                 .add_modify = STA_MODE_MODIFY,
3579                 .sta_id = sta->sta_id,
3580                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3581                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3582                 .mac_id_n_color = cpu_to_le32(id),
3583         };
3584         int ret;
3585
3586         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3587                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3588         if (ret)
3589                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3590 }
3591
3592 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3593                                        struct iwl_mvm_vif *mvmvif,
3594                                        bool disable)
3595 {
3596         struct ieee80211_sta *sta;
3597         struct iwl_mvm_sta *mvm_sta;
3598         int i;
3599
3600         lockdep_assert_held(&mvm->mutex);
3601
3602         /* Block/unblock all the stations of the given mvmvif */
3603         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3604                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3605                                                 lockdep_is_held(&mvm->mutex));
3606                 if (IS_ERR_OR_NULL(sta))
3607                         continue;
3608
3609                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3610                 if (mvm_sta->mac_id_n_color !=
3611                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3612                         continue;
3613
3614                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3615         }
3616
3617         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3618                 return;
3619
3620         /* Need to block/unblock also multicast station */
3621         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3622                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3623                                                   &mvmvif->mcast_sta, disable);
3624
3625         /*
3626          * Only unblock the broadcast station (FW blocks it for immediate
3627          * quiet, not the driver)
3628          */
3629         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3630                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3631                                                   &mvmvif->bcast_sta, disable);
3632 }
3633
3634 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3635 {
3636         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3637         struct iwl_mvm_sta *mvmsta;
3638
3639         rcu_read_lock();
3640
3641         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3642
3643         if (!WARN_ON(!mvmsta))
3644                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3645
3646         rcu_read_unlock();
3647 }