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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
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   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
   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.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
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  30  *  Intel Linux Wireless <linuxwifi@intel.com>
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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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  51  *    contributors may be used to endorse or promote products derived
  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,
  59  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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  61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  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                                                  STA_FLG_RTS_MIMO_PROT),
 126                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 127         };
 128         int ret;
 129         u32 status;
 130         u32 agg_size = 0, mpdu_dens = 0;
 131
 132         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
 133                 add_sta_cmd.station_type = mvm_sta->sta_type;
 134
 135         if (!update || (flags & STA_MODIFY_QUEUES)) {
 136                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 137
 138                 if (!iwl_mvm_has_new_tx_api(mvm)) {
 139                         add_sta_cmd.tfd_queue_msk =
 140                                 cpu_to_le32(mvm_sta->tfd_queue_msk);
 141
 142                         if (flags & STA_MODIFY_QUEUES)
 143                                 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 144                 } else {
 145                         WARN_ON(flags & STA_MODIFY_QUEUES);
 146                 }
 147         }
 148
 149         switch (sta->bandwidth) {
 150         case IEEE80211_STA_RX_BW_160:
 151                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 152                 /* fall through */
 153         case IEEE80211_STA_RX_BW_80:
 154                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 155                 /* fall through */
 156         case IEEE80211_STA_RX_BW_40:
 157                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 158                 /* fall through */
 159         case IEEE80211_STA_RX_BW_20:
 160                 if (sta->ht_cap.ht_supported)
 161                         add_sta_cmd.station_flags |=
 162                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 163                 break;
 164         }
 165
 166         switch (sta->rx_nss) {
 167         case 1:
 168                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 169                 break;
 170         case 2:
 171                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 172                 break;
 173         case 3 ... 8:
 174                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 175                 break;
 176         }
 177
 178         switch (sta->smps_mode) {
 179         case IEEE80211_SMPS_AUTOMATIC:
 180         case IEEE80211_SMPS_NUM_MODES:
 181                 WARN_ON(1);
 182                 break;
 183         case IEEE80211_SMPS_STATIC:
 184                 /* override NSS */
 185                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 186                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 187                 break;
 188         case IEEE80211_SMPS_DYNAMIC:
 189                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 190                 break;
 191         case IEEE80211_SMPS_OFF:
 192                 /* nothing */
 193                 break;
 194         }
 195
 196         if (sta->ht_cap.ht_supported) {
 197                 add_sta_cmd.station_flags_msk |=
 198                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 199                                     STA_FLG_AGG_MPDU_DENS_MSK);
 200
 201                 mpdu_dens = sta->ht_cap.ampdu_density;
 202         }
 203
 204         if (sta->vht_cap.vht_supported) {
 205                 agg_size = sta->vht_cap.cap &
 206                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 207                 agg_size >>=
 208                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 209         } else if (sta->ht_cap.ht_supported) {
 210                 agg_size = sta->ht_cap.ampdu_factor;
 211         }
 212
 213         add_sta_cmd.station_flags |=
 214                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 215         add_sta_cmd.station_flags |=
 216                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 217         if (mvm_sta->associated)
 218                 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 219
 220         if (sta->wme) {
 221                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 222
 223                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 224                         add_sta_cmd.uapsd_acs |= BIT(AC_BK);
 225                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 226                         add_sta_cmd.uapsd_acs |= BIT(AC_BE);
 227                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 228                         add_sta_cmd.uapsd_acs |= BIT(AC_VI);
 229                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 230                         add_sta_cmd.uapsd_acs |= BIT(AC_VO);
 231                 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
 232                 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
 233         }
 234
 235         status = ADD_STA_SUCCESS;
 236         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 237                                           iwl_mvm_add_sta_cmd_size(mvm),
 238                                           &add_sta_cmd, &status);
 239         if (ret)
 240                 return ret;
 241
 242         switch (status & IWL_ADD_STA_STATUS_MASK) {
 243         case ADD_STA_SUCCESS:
 244                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 245                 break;
 246         default:
 247                 ret = -EIO;
 248                 IWL_ERR(mvm, "ADD_STA failed\n");
 249                 break;
 250         }
 251
 252         return ret;
 253 }
 254
 255 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
 256 {
 257         struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
 258         struct iwl_mvm_baid_data *ba_data;
 259         struct ieee80211_sta *sta;
 260         struct iwl_mvm_sta *mvm_sta;
 261         unsigned long timeout;
 262
 263         rcu_read_lock();
 264
 265         ba_data = rcu_dereference(*rcu_ptr);
 266
 267         if (WARN_ON(!ba_data))
 268                 goto unlock;
 269
 270         if (!ba_data->timeout)
 271                 goto unlock;
 272
 273         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 274         if (time_is_after_jiffies(timeout)) {
 275                 mod_timer(&ba_data->session_timer, timeout);
 276                 goto unlock;
 277         }
 278
 279         /* Timer expired */
 280         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 281
 282         /*
 283          * sta should be valid unless the following happens:
 284          * The firmware asserts which triggers a reconfig flow, but
 285          * the reconfig fails before we set the pointer to sta into
 286          * the fw_id_to_mac_id pointer table. Mac80211 can't stop
 287          * A-MDPU and hence the timer continues to run. Then, the
 288          * timer expires and sta is NULL.
 289          */
 290         if (!sta)
 291                 goto unlock;
 292
 293         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 294         ieee80211_rx_ba_timer_expired(mvm_sta->vif,
 295                                       sta->addr, ba_data->tid);
 296 unlock:
 297         rcu_read_unlock();
 298 }
 299
 300 /* Disable aggregations for a bitmap of TIDs for a given station */
 301 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 302                                         unsigned long disable_agg_tids,
 303                                         bool remove_queue)
 304 {
 305         struct iwl_mvm_add_sta_cmd cmd = {};
 306         struct ieee80211_sta *sta;
 307         struct iwl_mvm_sta *mvmsta;
 308         u32 status;
 309         u8 sta_id;
 310         int ret;
 311
 312         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 313                 return -EINVAL;
 314
 315         spin_lock_bh(&mvm->queue_info_lock);
 316         sta_id = mvm->queue_info[queue].ra_sta_id;
 317         spin_unlock_bh(&mvm->queue_info_lock);
 318
 319         rcu_read_lock();
 320
 321         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 322
 323         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 324                 rcu_read_unlock();
 325                 return -EINVAL;
 326         }
 327
 328         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 329
 330         mvmsta->tid_disable_agg |= disable_agg_tids;
 331
 332         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 333         cmd.sta_id = mvmsta->sta_id;
 334         cmd.add_modify = STA_MODE_MODIFY;
 335         cmd.modify_mask = STA_MODIFY_QUEUES;
 336         if (disable_agg_tids)
 337                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 338         if (remove_queue)
 339                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 340         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 341         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 342
 343         rcu_read_unlock();
 344
 345         /* Notify FW of queue removal from the STA queues */
 346         status = ADD_STA_SUCCESS;
 347         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 348                                           iwl_mvm_add_sta_cmd_size(mvm),
 349                                           &cmd, &status);
 350
 351         return ret;
 352 }
 353
 354 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 355 {
 356         struct ieee80211_sta *sta;
 357         struct iwl_mvm_sta *mvmsta;
 358         unsigned long tid_bitmap;
 359         unsigned long agg_tids = 0;
 360         u8 sta_id;
 361         int tid;
 362
 363         lockdep_assert_held(&mvm->mutex);
 364
 365         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 366                 return -EINVAL;
 367
 368         spin_lock_bh(&mvm->queue_info_lock);
 369         sta_id = mvm->queue_info[queue].ra_sta_id;
 370         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 371         spin_unlock_bh(&mvm->queue_info_lock);
 372
 373         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 374                                         lockdep_is_held(&mvm->mutex));
 375
 376         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 377                 return -EINVAL;
 378
 379         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 380
 381         spin_lock_bh(&mvmsta->lock);
 382         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 383                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 384                         agg_tids |= BIT(tid);
 385         }
 386         spin_unlock_bh(&mvmsta->lock);
 387
 388         return agg_tids;
 389 }
 390
 391 /*
 392  * Remove a queue from a station's resources.
 393  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 394  * doesn't disable the queue
 395  */
 396 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 397 {
 398         struct ieee80211_sta *sta;
 399         struct iwl_mvm_sta *mvmsta;
 400         unsigned long tid_bitmap;
 401         unsigned long disable_agg_tids = 0;
 402         u8 sta_id;
 403         int tid;
 404
 405         lockdep_assert_held(&mvm->mutex);
 406
 407         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 408                 return -EINVAL;
 409
 410         spin_lock_bh(&mvm->queue_info_lock);
 411         sta_id = mvm->queue_info[queue].ra_sta_id;
 412         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 413         spin_unlock_bh(&mvm->queue_info_lock);
 414
 415         rcu_read_lock();
 416
 417         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 418
 419         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 420                 rcu_read_unlock();
 421                 return 0;
 422         }
 423
 424         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 425
 426         spin_lock_bh(&mvmsta->lock);
 427         /* Unmap MAC queues and TIDs from this queue */
 428         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 429                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 430                         disable_agg_tids |= BIT(tid);
 431                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
 432         }
 433
 434         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 435         spin_unlock_bh(&mvmsta->lock);
 436
 437         rcu_read_unlock();
 438
 439         return disable_agg_tids;
 440 }
 441
 442 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
 443                                        bool same_sta)
 444 {
 445         struct iwl_mvm_sta *mvmsta;
 446         u8 txq_curr_ac, sta_id, tid;
 447         unsigned long disable_agg_tids = 0;
 448         int ret;
 449
 450         lockdep_assert_held(&mvm->mutex);
 451
 452         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 453                 return -EINVAL;
 454
 455         spin_lock_bh(&mvm->queue_info_lock);
 456         txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
 457         sta_id = mvm->queue_info[queue].ra_sta_id;
 458         tid = mvm->queue_info[queue].txq_tid;
 459         spin_unlock_bh(&mvm->queue_info_lock);
 460
 461         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 462         if (WARN_ON(!mvmsta))
 463                 return -EINVAL;
 464
 465         disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 466         /* Disable the queue */
 467         if (disable_agg_tids)
 468                 iwl_mvm_invalidate_sta_queue(mvm, queue,
 469                                              disable_agg_tids, false);
 470
 471         ret = iwl_mvm_disable_txq(mvm, queue,
 472                                   mvmsta->vif->hw_queue[txq_curr_ac],
 473                                   tid, 0);
 474         if (ret) {
 475                 /* Re-mark the inactive queue as inactive */
 476                 spin_lock_bh(&mvm->queue_info_lock);
 477                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
 478                 spin_unlock_bh(&mvm->queue_info_lock);
 479                 IWL_ERR(mvm,
 480                         "Failed to free inactive queue %d (ret=%d)\n",
 481                         queue, ret);
 482
 483                 return ret;
 484         }
 485
 486         /* If TXQ is allocated to another STA, update removal in FW */
 487         if (!same_sta)
 488                 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 489
 490         return 0;
 491 }
 492
 493 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 494                                     unsigned long tfd_queue_mask, u8 ac)
 495 {
 496         int queue = 0;
 497         u8 ac_to_queue[IEEE80211_NUM_ACS];
 498         int i;
 499
 500         lockdep_assert_held(&mvm->queue_info_lock);
 501         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 502                 return -EINVAL;
 503
 504         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 505
 506         /* See what ACs the existing queues for this STA have */
 507         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 508                 /* Only DATA queues can be shared */
 509                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 510                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 511                         continue;
 512
 513                 /* Don't try and take queues being reconfigured */
 514                 if (mvm->queue_info[queue].status ==
 515                     IWL_MVM_QUEUE_RECONFIGURING)
 516                         continue;
 517
 518                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 519         }
 520
 521         /*
 522          * The queue to share is chosen only from DATA queues as follows (in
 523          * descending priority):
 524          * 1. An AC_BE queue
 525          * 2. Same AC queue
 526          * 3. Highest AC queue that is lower than new AC
 527          * 4. Any existing AC (there always is at least 1 DATA queue)
 528          */
 529
 530         /* Priority 1: An AC_BE queue */
 531         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 532                 queue = ac_to_queue[IEEE80211_AC_BE];
 533         /* Priority 2: Same AC queue */
 534         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 535                 queue = ac_to_queue[ac];
 536         /* Priority 3a: If new AC is VO and VI exists - use VI */
 537         else if (ac == IEEE80211_AC_VO &&
 538                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 539                 queue = ac_to_queue[IEEE80211_AC_VI];
 540         /* Priority 3b: No BE so only AC less than the new one is BK */
 541         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 542                 queue = ac_to_queue[IEEE80211_AC_BK];
 543         /* Priority 4a: No BE nor BK - use VI if exists */
 544         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 545                 queue = ac_to_queue[IEEE80211_AC_VI];
 546         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 547         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 548                 queue = ac_to_queue[IEEE80211_AC_VO];
 549
 550         /* Make sure queue found (or not) is legal */
 551         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 552             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 553             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 554                 IWL_ERR(mvm, "No DATA queues available to share\n");
 555                 return -ENOSPC;
 556         }
 557
 558         /* Make sure the queue isn't in the middle of being reconfigured */
 559         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
 560                 IWL_ERR(mvm,
 561                         "TXQ %d is in the middle of re-config - try again\n",
 562                         queue);
 563                 return -EBUSY;
 564         }
 565
 566         return queue;
 567 }
 568
 569 /*
 570  * If a given queue has a higher AC than the TID stream that is being compared
 571  * to, the queue needs to be redirected to the lower AC. This function does that
 572  * in such a case, otherwise - if no redirection required - it does nothing,
 573  * unless the %force param is true.
 574  */
 575 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
 576                                int ac, int ssn, unsigned int wdg_timeout,
 577                                bool force)
 578 {
 579         struct iwl_scd_txq_cfg_cmd cmd = {
 580                 .scd_queue = queue,
 581                 .action = SCD_CFG_DISABLE_QUEUE,
 582         };
 583         bool shared_queue;
 584         unsigned long mq;
 585         int ret;
 586
 587         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 588                 return -EINVAL;
 589
 590         /*
 591          * If the AC is lower than current one - FIFO needs to be redirected to
 592          * the lowest one of the streams in the queue. Check if this is needed
 593          * here.
 594          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 595          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 596          * we need to check if the numerical value of X is LARGER than of Y.
 597          */
 598         spin_lock_bh(&mvm->queue_info_lock);
 599         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 600                 spin_unlock_bh(&mvm->queue_info_lock);
 601
 602                 IWL_DEBUG_TX_QUEUES(mvm,
 603                                     "No redirection needed on TXQ #%d\n",
 604                                     queue);
 605                 return 0;
 606         }
 607
 608         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 609         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 610         cmd.tid = mvm->queue_info[queue].txq_tid;
 611         mq = mvm->hw_queue_to_mac80211[queue];
 612         shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
 613         spin_unlock_bh(&mvm->queue_info_lock);
 614
 615         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 616                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 617
 618         /* Stop MAC queues and wait for this queue to empty */
 619         iwl_mvm_stop_mac_queues(mvm, mq);
 620         ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
 621         if (ret) {
 622                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 623                         queue);
 624                 ret = -EIO;
 625                 goto out;
 626         }
 627
 628         /* Before redirecting the queue we need to de-activate it */
 629         iwl_trans_txq_disable(mvm->trans, queue, false);
 630         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 631         if (ret)
 632                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 633                         ret);
 634
 635         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 636         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 637
 638         /* Update the TID "owner" of the queue */
 639         spin_lock_bh(&mvm->queue_info_lock);
 640         mvm->queue_info[queue].txq_tid = tid;
 641         spin_unlock_bh(&mvm->queue_info_lock);
 642
 643         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 644
 645         /* Redirect to lower AC */
 646         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 647                              cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
 648                              ssn);
 649
 650         /* Update AC marking of the queue */
 651         spin_lock_bh(&mvm->queue_info_lock);
 652         mvm->queue_info[queue].mac80211_ac = ac;
 653         spin_unlock_bh(&mvm->queue_info_lock);
 654
 655         /*
 656          * Mark queue as shared in transport if shared
 657          * Note this has to be done after queue enablement because enablement
 658          * can also set this value, and there is no indication there to shared
 659          * queues
 660          */
 661         if (shared_queue)
 662                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 663
 664 out:
 665         /* Continue using the MAC queues */
 666         iwl_mvm_start_mac_queues(mvm, mq);
 667
 668         return ret;
 669 }
 670
 671 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
 672                                         struct ieee80211_sta *sta, u8 ac,
 673                                         int tid)
 674 {
 675         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 676         unsigned int wdg_timeout =
 677                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 678         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 679         int queue = -1;
 680
 681         lockdep_assert_held(&mvm->mutex);
 682
 683         IWL_DEBUG_TX_QUEUES(mvm,
 684                             "Allocating queue for sta %d on tid %d\n",
 685                             mvmsta->sta_id, tid);
 686         queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
 687                                         wdg_timeout);
 688         if (queue < 0)
 689                 return queue;
 690
 691         IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
 692
 693         spin_lock_bh(&mvmsta->lock);
 694         mvmsta->tid_data[tid].txq_id = queue;
 695         mvmsta->tid_data[tid].is_tid_active = true;
 696         spin_unlock_bh(&mvmsta->lock);
 697
 698         return 0;
 699 }
 700
 701 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
 702                                    struct ieee80211_sta *sta, u8 ac, int tid,
 703                                    struct ieee80211_hdr *hdr)
 704 {
 705         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 706         struct iwl_trans_txq_scd_cfg cfg = {
 707                 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
 708                 .sta_id = mvmsta->sta_id,
 709                 .tid = tid,
 710                 .frame_limit = IWL_FRAME_LIMIT,
 711         };
 712         unsigned int wdg_timeout =
 713                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 714         u8 mac_queue = mvmsta->vif->hw_queue[ac];
 715         int queue = -1;
 716         bool using_inactive_queue = false, same_sta = false;
 717         unsigned long disable_agg_tids = 0;
 718         enum iwl_mvm_agg_state queue_state;
 719         bool shared_queue = false, inc_ssn;
 720         int ssn;
 721         unsigned long tfd_queue_mask;
 722         int ret;
 723
 724         lockdep_assert_held(&mvm->mutex);
 725
 726         if (iwl_mvm_has_new_tx_api(mvm))
 727                 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
 728
 729         spin_lock_bh(&mvmsta->lock);
 730         tfd_queue_mask = mvmsta->tfd_queue_msk;
 731         spin_unlock_bh(&mvmsta->lock);
 732
 733         spin_lock_bh(&mvm->queue_info_lock);
 734
 735         /*
 736          * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
 737          * exists
 738          */
 739         if (!ieee80211_is_data_qos(hdr->frame_control) ||
 740             ieee80211_is_qos_nullfunc(hdr->frame_control)) {
 741                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 742                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
 743                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
 744                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
 745                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
 746                                             queue);
 747
 748                 /* If no such queue is found, we'll use a DATA queue instead */
 749         }
 750
 751         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
 752             (mvm->queue_info[mvmsta->reserved_queue].status ==
 753              IWL_MVM_QUEUE_RESERVED ||
 754              mvm->queue_info[mvmsta->reserved_queue].status ==
 755              IWL_MVM_QUEUE_INACTIVE)) {
 756                 queue = mvmsta->reserved_queue;
 757                 mvm->queue_info[queue].reserved = true;
 758                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
 759         }
 760
 761         if (queue < 0)
 762                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
 763                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
 764                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
 765
 766         /*
 767          * Check if this queue is already allocated but inactive.
 768          * In such a case, we'll need to first free this queue before enabling
 769          * it again, so we'll mark it as reserved to make sure no new traffic
 770          * arrives on it
 771          */
 772         if (queue > 0 &&
 773             mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
 774                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
 775                 using_inactive_queue = true;
 776                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
 777                 IWL_DEBUG_TX_QUEUES(mvm,
 778                                     "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
 779                                     queue, mvmsta->sta_id, tid);
 780         }
 781
 782         /* No free queue - we'll have to share */
 783         if (queue <= 0) {
 784                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
 785                 if (queue > 0) {
 786                         shared_queue = true;
 787                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
 788                 }
 789         }
 790
 791         /*
 792          * Mark TXQ as ready, even though it hasn't been fully configured yet,
 793          * to make sure no one else takes it.
 794          * This will allow avoiding re-acquiring the lock at the end of the
 795          * configuration. On error we'll mark it back as free.
 796          */
 797         if ((queue > 0) && !shared_queue)
 798                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 799
 800         spin_unlock_bh(&mvm->queue_info_lock);
 801
 802         /* This shouldn't happen - out of queues */
 803         if (WARN_ON(queue <= 0)) {
 804                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
 805                         tid, cfg.sta_id);
 806                 return queue;
 807         }
 808
 809         /*
 810          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
 811          * but for configuring the SCD to send A-MPDUs we need to mark the queue
 812          * as aggregatable.
 813          * Mark all DATA queues as allowing to be aggregated at some point
 814          */
 815         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
 816                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
 817
 818         /*
 819          * If this queue was previously inactive (idle) - we need to free it
 820          * first
 821          */
 822         if (using_inactive_queue) {
 823                 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
 824                 if (ret)
 825                         return ret;
 826         }
 827
 828         IWL_DEBUG_TX_QUEUES(mvm,
 829                             "Allocating %squeue #%d to sta %d on tid %d\n",
 830                             shared_queue ? "shared " : "", queue,
 831                             mvmsta->sta_id, tid);
 832
 833         if (shared_queue) {
 834                 /* Disable any open aggs on this queue */
 835                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
 836
 837                 if (disable_agg_tids) {
 838                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
 839                                             queue);
 840                         iwl_mvm_invalidate_sta_queue(mvm, queue,
 841                                                      disable_agg_tids, false);
 842                 }
 843         }
 844
 845         ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 846         inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
 847                                      ssn, &cfg, wdg_timeout);
 848         if (inc_ssn) {
 849                 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
 850                 le16_add_cpu(&hdr->seq_ctrl, 0x10);
 851         }
 852
 853         /*
 854          * Mark queue as shared in transport if shared
 855          * Note this has to be done after queue enablement because enablement
 856          * can also set this value, and there is no indication there to shared
 857          * queues
 858          */
 859         if (shared_queue)
 860                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 861
 862         spin_lock_bh(&mvmsta->lock);
 863         /*
 864          * This looks racy, but it is not. We have only one packet for
 865          * this ra/tid in our Tx path since we stop the Qdisc when we
 866          * need to allocate a new TFD queue.
 867          */
 868         if (inc_ssn)
 869                 mvmsta->tid_data[tid].seq_number += 0x10;
 870         mvmsta->tid_data[tid].txq_id = queue;
 871         mvmsta->tid_data[tid].is_tid_active = true;
 872         mvmsta->tfd_queue_msk |= BIT(queue);
 873         queue_state = mvmsta->tid_data[tid].state;
 874
 875         if (mvmsta->reserved_queue == queue)
 876                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
 877         spin_unlock_bh(&mvmsta->lock);
 878
 879         if (!shared_queue) {
 880                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
 881                 if (ret)
 882                         goto out_err;
 883
 884                 /* If we need to re-enable aggregations... */
 885                 if (queue_state == IWL_AGG_ON) {
 886                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
 887                         if (ret)
 888                                 goto out_err;
 889                 }
 890         } else {
 891                 /* Redirect queue, if needed */
 892                 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
 893                                                  wdg_timeout, false);
 894                 if (ret)
 895                         goto out_err;
 896         }
 897
 898         return 0;
 899
 900 out_err:
 901         iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
 902
 903         return ret;
 904 }
 905
 906 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
 907 {
 908         struct iwl_scd_txq_cfg_cmd cmd = {
 909                 .scd_queue = queue,
 910                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 911         };
 912         int tid;
 913         unsigned long tid_bitmap;
 914         int ret;
 915
 916         lockdep_assert_held(&mvm->mutex);
 917
 918         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 919                 return;
 920
 921         spin_lock_bh(&mvm->queue_info_lock);
 922         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 923         spin_unlock_bh(&mvm->queue_info_lock);
 924
 925         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 926                 return;
 927
 928         /* Find any TID for queue */
 929         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 930         cmd.tid = tid;
 931         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 932
 933         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 934         if (ret) {
 935                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 936                         queue, ret);
 937                 return;
 938         }
 939
 940         spin_lock_bh(&mvm->queue_info_lock);
 941         mvm->queue_info[queue].txq_tid = tid;
 942         spin_unlock_bh(&mvm->queue_info_lock);
 943         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 944                             queue, tid);
 945 }
 946
 947 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
 948 {
 949         struct ieee80211_sta *sta;
 950         struct iwl_mvm_sta *mvmsta;
 951         u8 sta_id;
 952         int tid = -1;
 953         unsigned long tid_bitmap;
 954         unsigned int wdg_timeout;
 955         int ssn;
 956         int ret = true;
 957
 958         /* queue sharing is disabled on new TX path */
 959         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 960                 return;
 961
 962         lockdep_assert_held(&mvm->mutex);
 963
 964         spin_lock_bh(&mvm->queue_info_lock);
 965         sta_id = mvm->queue_info[queue].ra_sta_id;
 966         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 967         spin_unlock_bh(&mvm->queue_info_lock);
 968
 969         /* Find TID for queue, and make sure it is the only one on the queue */
 970         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 971         if (tid_bitmap != BIT(tid)) {
 972                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
 973                         queue, tid_bitmap);
 974                 return;
 975         }
 976
 977         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
 978                             tid);
 979
 980         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 981                                         lockdep_is_held(&mvm->mutex));
 982
 983         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 984                 return;
 985
 986         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 987         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 988
 989         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
 990
 991         ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
 992                                          tid_to_mac80211_ac[tid], ssn,
 993                                          wdg_timeout, true);
 994         if (ret) {
 995                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
 996                 return;
 997         }
 998
 999         /* If aggs should be turned back on - do it */
1000         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1001                 struct iwl_mvm_add_sta_cmd cmd = {0};
1002
1003                 mvmsta->tid_disable_agg &= ~BIT(tid);
1004
1005                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1006                 cmd.sta_id = mvmsta->sta_id;
1007                 cmd.add_modify = STA_MODE_MODIFY;
1008                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1009                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1010                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1011
1012                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1013                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1014                 if (!ret) {
1015                         IWL_DEBUG_TX_QUEUES(mvm,
1016                                             "TXQ #%d is now aggregated again\n",
1017                                             queue);
1018
1019                         /* Mark queue intenally as aggregating again */
1020                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1021                 }
1022         }
1023
1024         spin_lock_bh(&mvm->queue_info_lock);
1025         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1026         spin_unlock_bh(&mvm->queue_info_lock);
1027 }
1028
1029 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1030 {
1031         if (tid == IWL_MAX_TID_COUNT)
1032                 return IEEE80211_AC_VO; /* MGMT */
1033
1034         return tid_to_mac80211_ac[tid];
1035 }
1036
1037 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1038                                        struct ieee80211_sta *sta, int tid)
1039 {
1040         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1041         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1042         struct sk_buff *skb;
1043         struct ieee80211_hdr *hdr;
1044         struct sk_buff_head deferred_tx;
1045         u8 mac_queue;
1046         bool no_queue = false; /* Marks if there is a problem with the queue */
1047         u8 ac;
1048
1049         lockdep_assert_held(&mvm->mutex);
1050
1051         skb = skb_peek(&tid_data->deferred_tx_frames);
1052         if (!skb)
1053                 return;
1054         hdr = (void *)skb->data;
1055
1056         ac = iwl_mvm_tid_to_ac_queue(tid);
1057         mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1058
1059         if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1060             iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1061                 IWL_ERR(mvm,
1062                         "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1063                         mvmsta->sta_id, tid);
1064
1065                 /*
1066                  * Mark queue as problematic so later the deferred traffic is
1067                  * freed, as we can do nothing with it
1068                  */
1069                 no_queue = true;
1070         }
1071
1072         __skb_queue_head_init(&deferred_tx);
1073
1074         /* Disable bottom-halves when entering TX path */
1075         local_bh_disable();
1076         spin_lock(&mvmsta->lock);
1077         skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1078         mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1079         spin_unlock(&mvmsta->lock);
1080
1081         while ((skb = __skb_dequeue(&deferred_tx)))
1082                 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1083                         ieee80211_free_txskb(mvm->hw, skb);
1084         local_bh_enable();
1085
1086         /* Wake queue */
1087         iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1088 }
1089
1090 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1091 {
1092         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1093                                            add_stream_wk);
1094         struct ieee80211_sta *sta;
1095         struct iwl_mvm_sta *mvmsta;
1096         unsigned long deferred_tid_traffic;
1097         int queue, sta_id, tid;
1098
1099         /* Check inactivity of queues */
1100         iwl_mvm_inactivity_check(mvm);
1101
1102         mutex_lock(&mvm->mutex);
1103
1104         /* No queue reconfiguration in TVQM mode */
1105         if (iwl_mvm_has_new_tx_api(mvm))
1106                 goto alloc_queues;
1107
1108         /* Reconfigure queues requiring reconfiguation */
1109         for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1110                 bool reconfig;
1111                 bool change_owner;
1112
1113                 spin_lock_bh(&mvm->queue_info_lock);
1114                 reconfig = (mvm->queue_info[queue].status ==
1115                             IWL_MVM_QUEUE_RECONFIGURING);
1116
1117                 /*
1118                  * We need to take into account a situation in which a TXQ was
1119                  * allocated to TID x, and then turned shared by adding TIDs y
1120                  * and z. If TID x becomes inactive and is removed from the TXQ,
1121                  * ownership must be given to one of the remaining TIDs.
1122                  * This is mainly because if TID x continues - a new queue can't
1123                  * be allocated for it as long as it is an owner of another TXQ.
1124                  */
1125                 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1126                                  BIT(mvm->queue_info[queue].txq_tid)) &&
1127                                (mvm->queue_info[queue].status ==
1128                                 IWL_MVM_QUEUE_SHARED);
1129                 spin_unlock_bh(&mvm->queue_info_lock);
1130
1131                 if (reconfig)
1132                         iwl_mvm_unshare_queue(mvm, queue);
1133                 else if (change_owner)
1134                         iwl_mvm_change_queue_owner(mvm, queue);
1135         }
1136
1137 alloc_queues:
1138         /* Go over all stations with deferred traffic */
1139         for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1140                          IWL_MVM_STATION_COUNT) {
1141                 clear_bit(sta_id, mvm->sta_deferred_frames);
1142                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1143                                                 lockdep_is_held(&mvm->mutex));
1144                 if (IS_ERR_OR_NULL(sta))
1145                         continue;
1146
1147                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1148                 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1149
1150                 for_each_set_bit(tid, &deferred_tid_traffic,
1151                                  IWL_MAX_TID_COUNT + 1)
1152                         iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1153         }
1154
1155         mutex_unlock(&mvm->mutex);
1156 }
1157
1158 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1159                                       struct ieee80211_sta *sta,
1160                                       enum nl80211_iftype vif_type)
1161 {
1162         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1163         int queue;
1164         bool using_inactive_queue = false, same_sta = false;
1165
1166         /* queue reserving is disabled on new TX path */
1167         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1168                 return 0;
1169
1170         /*
1171          * Check for inactive queues, so we don't reach a situation where we
1172          * can't add a STA due to a shortage in queues that doesn't really exist
1173          */
1174         iwl_mvm_inactivity_check(mvm);
1175
1176         spin_lock_bh(&mvm->queue_info_lock);
1177
1178         /* Make sure we have free resources for this STA */
1179         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1180             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1181             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1182              IWL_MVM_QUEUE_FREE))
1183                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1184         else
1185                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1186                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1187                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1188         if (queue < 0) {
1189                 spin_unlock_bh(&mvm->queue_info_lock);
1190                 IWL_ERR(mvm, "No available queues for new station\n");
1191                 return -ENOSPC;
1192         } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1193                 /*
1194                  * If this queue is already allocated but inactive we'll need to
1195                  * first free this queue before enabling it again, we'll mark
1196                  * it as reserved to make sure no new traffic arrives on it
1197                  */
1198                 using_inactive_queue = true;
1199                 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1200         }
1201         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1202
1203         spin_unlock_bh(&mvm->queue_info_lock);
1204
1205         mvmsta->reserved_queue = queue;
1206
1207         if (using_inactive_queue)
1208                 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1209
1210         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1211                             queue, mvmsta->sta_id);
1212
1213         return 0;
1214 }
1215
1216 /*
1217  * In DQA mode, after a HW restart the queues should be allocated as before, in
1218  * order to avoid race conditions when there are shared queues. This function
1219  * does the re-mapping and queue allocation.
1220  *
1221  * Note that re-enabling aggregations isn't done in this function.
1222  */
1223 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1224                                                  struct iwl_mvm_sta *mvm_sta)
1225 {
1226         unsigned int wdg_timeout =
1227                         iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1228         int i;
1229         struct iwl_trans_txq_scd_cfg cfg = {
1230                 .sta_id = mvm_sta->sta_id,
1231                 .frame_limit = IWL_FRAME_LIMIT,
1232         };
1233
1234         /* Make sure reserved queue is still marked as such (if allocated) */
1235         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1236                 mvm->queue_info[mvm_sta->reserved_queue].status =
1237                         IWL_MVM_QUEUE_RESERVED;
1238
1239         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1240                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1241                 int txq_id = tid_data->txq_id;
1242                 int ac;
1243                 u8 mac_queue;
1244
1245                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1246                         continue;
1247
1248                 skb_queue_head_init(&tid_data->deferred_tx_frames);
1249
1250                 ac = tid_to_mac80211_ac[i];
1251                 mac_queue = mvm_sta->vif->hw_queue[ac];
1252
1253                 if (iwl_mvm_has_new_tx_api(mvm)) {
1254                         IWL_DEBUG_TX_QUEUES(mvm,
1255                                             "Re-mapping sta %d tid %d\n",
1256                                             mvm_sta->sta_id, i);
1257                         txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1258                                                          mvm_sta->sta_id,
1259                                                          i, wdg_timeout);
1260                         tid_data->txq_id = txq_id;
1261                 } else {
1262                         u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1263
1264                         cfg.tid = i;
1265                         cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1266                         cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1267                                          txq_id ==
1268                                          IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1269
1270                         IWL_DEBUG_TX_QUEUES(mvm,
1271                                             "Re-mapping sta %d tid %d to queue %d\n",
1272                                             mvm_sta->sta_id, i, txq_id);
1273
1274                         iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1275                                            wdg_timeout);
1276                         mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1277                 }
1278         }
1279 }
1280
1281 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1282                                       struct iwl_mvm_int_sta *sta,
1283                                       const u8 *addr,
1284                                       u16 mac_id, u16 color)
1285 {
1286         struct iwl_mvm_add_sta_cmd cmd;
1287         int ret;
1288         u32 status = ADD_STA_SUCCESS;
1289
1290         lockdep_assert_held(&mvm->mutex);
1291
1292         memset(&cmd, 0, sizeof(cmd));
1293         cmd.sta_id = sta->sta_id;
1294         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1295                                                              color));
1296         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1297                 cmd.station_type = sta->type;
1298
1299         if (!iwl_mvm_has_new_tx_api(mvm))
1300                 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1301         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1302
1303         if (addr)
1304                 memcpy(cmd.addr, addr, ETH_ALEN);
1305
1306         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1307                                           iwl_mvm_add_sta_cmd_size(mvm),
1308                                           &cmd, &status);
1309         if (ret)
1310                 return ret;
1311
1312         switch (status & IWL_ADD_STA_STATUS_MASK) {
1313         case ADD_STA_SUCCESS:
1314                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1315                 return 0;
1316         default:
1317                 ret = -EIO;
1318                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1319                         status);
1320                 break;
1321         }
1322         return ret;
1323 }
1324
1325 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1326                     struct ieee80211_vif *vif,
1327                     struct ieee80211_sta *sta)
1328 {
1329         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1330         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1331         struct iwl_mvm_rxq_dup_data *dup_data;
1332         int i, ret, sta_id;
1333         bool sta_update = false;
1334         unsigned int sta_flags = 0;
1335
1336         lockdep_assert_held(&mvm->mutex);
1337
1338         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1339                 sta_id = iwl_mvm_find_free_sta_id(mvm,
1340                                                   ieee80211_vif_type_p2p(vif));
1341         else
1342                 sta_id = mvm_sta->sta_id;
1343
1344         if (sta_id == IWL_MVM_INVALID_STA)
1345                 return -ENOSPC;
1346
1347         spin_lock_init(&mvm_sta->lock);
1348
1349         /* if this is a HW restart re-alloc existing queues */
1350         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1351                 struct iwl_mvm_int_sta tmp_sta = {
1352                         .sta_id = sta_id,
1353                         .type = mvm_sta->sta_type,
1354                 };
1355
1356                 /*
1357                  * First add an empty station since allocating
1358                  * a queue requires a valid station
1359                  */
1360                 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1361                                                  mvmvif->id, mvmvif->color);
1362                 if (ret)
1363                         goto err;
1364
1365                 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1366                 sta_update = true;
1367                 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1368                 goto update_fw;
1369         }
1370
1371         mvm_sta->sta_id = sta_id;
1372         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1373                                                       mvmvif->color);
1374         mvm_sta->vif = vif;
1375         if (!mvm->trans->cfg->gen2)
1376                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1377         else
1378                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1379         mvm_sta->tx_protection = 0;
1380         mvm_sta->tt_tx_protection = false;
1381         mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1382
1383         /* HW restart, don't assume the memory has been zeroed */
1384         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1385         mvm_sta->tfd_queue_msk = 0;
1386
1387         /* for HW restart - reset everything but the sequence number */
1388         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1389                 u16 seq = mvm_sta->tid_data[i].seq_number;
1390                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1391                 mvm_sta->tid_data[i].seq_number = seq;
1392
1393                 /*
1394                  * Mark all queues for this STA as unallocated and defer TX
1395                  * frames until the queue is allocated
1396                  */
1397                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1398                 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1399         }
1400         mvm_sta->deferred_traffic_tid_map = 0;
1401         mvm_sta->agg_tids = 0;
1402
1403         if (iwl_mvm_has_new_rx_api(mvm) &&
1404             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1405                 int q;
1406
1407                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1408                                    sizeof(*dup_data), GFP_KERNEL);
1409                 if (!dup_data)
1410                         return -ENOMEM;
1411                 /*
1412                  * Initialize all the last_seq values to 0xffff which can never
1413                  * compare equal to the frame's seq_ctrl in the check in
1414                  * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1415                  * number and fragmented packets don't reach that function.
1416                  *
1417                  * This thus allows receiving a packet with seqno 0 and the
1418                  * retry bit set as the very first packet on a new TID.
1419                  */
1420                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1421                         memset(dup_data[q].last_seq, 0xff,
1422                                sizeof(dup_data[q].last_seq));
1423                 mvm_sta->dup_data = dup_data;
1424         }
1425
1426         if (!iwl_mvm_has_new_tx_api(mvm)) {
1427                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1428                                                  ieee80211_vif_type_p2p(vif));
1429                 if (ret)
1430                         goto err;
1431         }
1432
1433 update_fw:
1434         ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1435         if (ret)
1436                 goto err;
1437
1438         if (vif->type == NL80211_IFTYPE_STATION) {
1439                 if (!sta->tdls) {
1440                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1441                         mvmvif->ap_sta_id = sta_id;
1442                 } else {
1443                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1444                 }
1445         }
1446
1447         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1448
1449         return 0;
1450
1451 err:
1452         return ret;
1453 }
1454
1455 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1456                       bool drain)
1457 {
1458         struct iwl_mvm_add_sta_cmd cmd = {};
1459         int ret;
1460         u32 status;
1461
1462         lockdep_assert_held(&mvm->mutex);
1463
1464         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1465         cmd.sta_id = mvmsta->sta_id;
1466         cmd.add_modify = STA_MODE_MODIFY;
1467         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1468         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1469
1470         status = ADD_STA_SUCCESS;
1471         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1472                                           iwl_mvm_add_sta_cmd_size(mvm),
1473                                           &cmd, &status);
1474         if (ret)
1475                 return ret;
1476
1477         switch (status & IWL_ADD_STA_STATUS_MASK) {
1478         case ADD_STA_SUCCESS:
1479                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1480                                mvmsta->sta_id);
1481                 break;
1482         default:
1483                 ret = -EIO;
1484                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1485                         mvmsta->sta_id);
1486                 break;
1487         }
1488
1489         return ret;
1490 }
1491
1492 /*
1493  * Remove a station from the FW table. Before sending the command to remove
1494  * the station validate that the station is indeed known to the driver (sanity
1495  * only).
1496  */
1497 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1498 {
1499         struct ieee80211_sta *sta;
1500         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1501                 .sta_id = sta_id,
1502         };
1503         int ret;
1504
1505         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1506                                         lockdep_is_held(&mvm->mutex));
1507
1508         /* Note: internal stations are marked as error values */
1509         if (!sta) {
1510                 IWL_ERR(mvm, "Invalid station id\n");
1511                 return -EINVAL;
1512         }
1513
1514         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1515                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1516         if (ret) {
1517                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1518                 return ret;
1519         }
1520
1521         return 0;
1522 }
1523
1524 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1525                                        struct ieee80211_vif *vif,
1526                                        struct iwl_mvm_sta *mvm_sta)
1527 {
1528         int ac;
1529         int i;
1530
1531         lockdep_assert_held(&mvm->mutex);
1532
1533         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1534                 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1535                         continue;
1536
1537                 ac = iwl_mvm_tid_to_ac_queue(i);
1538                 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1539                                     vif->hw_queue[ac], i, 0);
1540                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1541         }
1542 }
1543
1544 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1545                                   struct iwl_mvm_sta *mvm_sta)
1546 {
1547         int i;
1548
1549         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1550                 u16 txq_id;
1551                 int ret;
1552
1553                 spin_lock_bh(&mvm_sta->lock);
1554                 txq_id = mvm_sta->tid_data[i].txq_id;
1555                 spin_unlock_bh(&mvm_sta->lock);
1556
1557                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1558                         continue;
1559
1560                 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1561                 if (ret)
1562                         return ret;
1563         }
1564
1565         return 0;
1566 }
1567
1568 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1569                    struct ieee80211_vif *vif,
1570                    struct ieee80211_sta *sta)
1571 {
1572         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1573         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1574         u8 sta_id = mvm_sta->sta_id;
1575         int ret;
1576
1577         lockdep_assert_held(&mvm->mutex);
1578
1579         if (iwl_mvm_has_new_rx_api(mvm))
1580                 kfree(mvm_sta->dup_data);
1581
1582         ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1583         if (ret)
1584                 return ret;
1585
1586         /* flush its queues here since we are freeing mvm_sta */
1587         ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1588         if (ret)
1589                 return ret;
1590         if (iwl_mvm_has_new_tx_api(mvm)) {
1591                 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1592         } else {
1593                 u32 q_mask = mvm_sta->tfd_queue_msk;
1594
1595                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1596                                                      q_mask);
1597         }
1598         if (ret)
1599                 return ret;
1600
1601         ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1602
1603         iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1604
1605         /* If there is a TXQ still marked as reserved - free it */
1606         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1607                 u8 reserved_txq = mvm_sta->reserved_queue;
1608                 enum iwl_mvm_queue_status *status;
1609
1610                 /*
1611                  * If no traffic has gone through the reserved TXQ - it
1612                  * is still marked as IWL_MVM_QUEUE_RESERVED, and
1613                  * should be manually marked as free again
1614                  */
1615                 spin_lock_bh(&mvm->queue_info_lock);
1616                 status = &mvm->queue_info[reserved_txq].status;
1617                 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1618                          (*status != IWL_MVM_QUEUE_FREE),
1619                          "sta_id %d reserved txq %d status %d",
1620                          sta_id, reserved_txq, *status)) {
1621                         spin_unlock_bh(&mvm->queue_info_lock);
1622                         return -EINVAL;
1623                 }
1624
1625                 *status = IWL_MVM_QUEUE_FREE;
1626                 spin_unlock_bh(&mvm->queue_info_lock);
1627         }
1628
1629         if (vif->type == NL80211_IFTYPE_STATION &&
1630             mvmvif->ap_sta_id == sta_id) {
1631                 /* if associated - we can't remove the AP STA now */
1632                 if (vif->bss_conf.assoc)
1633                         return ret;
1634
1635                 /* unassoc - go ahead - remove the AP STA now */
1636                 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1637
1638                 /* clear d0i3_ap_sta_id if no longer relevant */
1639                 if (mvm->d0i3_ap_sta_id == sta_id)
1640                         mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1641         }
1642
1643         /*
1644          * This shouldn't happen - the TDLS channel switch should be canceled
1645          * before the STA is removed.
1646          */
1647         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1648                 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1649                 cancel_delayed_work(&mvm->tdls_cs.dwork);
1650         }
1651
1652         /*
1653          * Make sure that the tx response code sees the station as -EBUSY and
1654          * calls the drain worker.
1655          */
1656         spin_lock_bh(&mvm_sta->lock);
1657         spin_unlock_bh(&mvm_sta->lock);
1658
1659         ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1660         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1661
1662         return ret;
1663 }
1664
1665 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1666                       struct ieee80211_vif *vif,
1667                       u8 sta_id)
1668 {
1669         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1670
1671         lockdep_assert_held(&mvm->mutex);
1672
1673         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1674         return ret;
1675 }
1676
1677 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1678                              struct iwl_mvm_int_sta *sta,
1679                              u32 qmask, enum nl80211_iftype iftype,
1680                              enum iwl_sta_type type)
1681 {
1682         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1683                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1684                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1685                         return -ENOSPC;
1686         }
1687
1688         sta->tfd_queue_msk = qmask;
1689         sta->type = type;
1690
1691         /* put a non-NULL value so iterating over the stations won't stop */
1692         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1693         return 0;
1694 }
1695
1696 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1697 {
1698         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1699         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1700         sta->sta_id = IWL_MVM_INVALID_STA;
1701 }
1702
1703 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm)
1704 {
1705         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1706                                         mvm->cfg->base_params->wd_timeout :
1707                                         IWL_WATCHDOG_DISABLED;
1708
1709         if (iwl_mvm_has_new_tx_api(mvm)) {
1710                 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue,
1711                                                     mvm->aux_sta.sta_id,
1712                                                     IWL_MAX_TID_COUNT,
1713                                                     wdg_timeout);
1714                 mvm->aux_queue = queue;
1715         } else {
1716                 struct iwl_trans_txq_scd_cfg cfg = {
1717                         .fifo = IWL_MVM_TX_FIFO_MCAST,
1718                         .sta_id = mvm->aux_sta.sta_id,
1719                         .tid = IWL_MAX_TID_COUNT,
1720                         .aggregate = false,
1721                         .frame_limit = IWL_FRAME_LIMIT,
1722                 };
1723
1724                 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1725                                    wdg_timeout);
1726         }
1727 }
1728
1729 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1730 {
1731         int ret;
1732
1733         lockdep_assert_held(&mvm->mutex);
1734
1735         /* Allocate aux station and assign to it the aux queue */
1736         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1737                                        NL80211_IFTYPE_UNSPECIFIED,
1738                                        IWL_STA_AUX_ACTIVITY);
1739         if (ret)
1740                 return ret;
1741
1742         /* Map Aux queue to fifo - needs to happen before adding Aux station */
1743         if (!iwl_mvm_has_new_tx_api(mvm))
1744                 iwl_mvm_enable_aux_queue(mvm);
1745
1746         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1747                                          MAC_INDEX_AUX, 0);
1748         if (ret) {
1749                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1750                 return ret;
1751         }
1752
1753         /*
1754          * For a000 firmware and on we cannot add queue to a station unknown
1755          * to firmware so enable queue here - after the station was added
1756          */
1757         if (iwl_mvm_has_new_tx_api(mvm))
1758                 iwl_mvm_enable_aux_queue(mvm);
1759
1760         return 0;
1761 }
1762
1763 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1764 {
1765         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1766
1767         lockdep_assert_held(&mvm->mutex);
1768         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1769                                          mvmvif->id, 0);
1770 }
1771
1772 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1773 {
1774         int ret;
1775
1776         lockdep_assert_held(&mvm->mutex);
1777
1778         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1779         if (ret)
1780                 IWL_WARN(mvm, "Failed sending remove station\n");
1781
1782         return ret;
1783 }
1784
1785 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1786 {
1787         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1788 }
1789
1790 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1791 {
1792         lockdep_assert_held(&mvm->mutex);
1793
1794         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1795 }
1796
1797 /*
1798  * Send the add station command for the vif's broadcast station.
1799  * Assumes that the station was already allocated.
1800  *
1801  * @mvm: the mvm component
1802  * @vif: the interface to which the broadcast station is added
1803  * @bsta: the broadcast station to add.
1804  */
1805 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1806 {
1807         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1808         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1809         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1810         const u8 *baddr = _baddr;
1811         int queue;
1812         int ret;
1813         unsigned int wdg_timeout =
1814                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1815         struct iwl_trans_txq_scd_cfg cfg = {
1816                 .fifo = IWL_MVM_TX_FIFO_VO,
1817                 .sta_id = mvmvif->bcast_sta.sta_id,
1818                 .tid = IWL_MAX_TID_COUNT,
1819                 .aggregate = false,
1820                 .frame_limit = IWL_FRAME_LIMIT,
1821         };
1822
1823         lockdep_assert_held(&mvm->mutex);
1824
1825         if (!iwl_mvm_has_new_tx_api(mvm)) {
1826                 if (vif->type == NL80211_IFTYPE_AP ||
1827                     vif->type == NL80211_IFTYPE_ADHOC)
1828                         queue = mvm->probe_queue;
1829                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1830                         queue = mvm->p2p_dev_queue;
1831                 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1832                         return -EINVAL;
1833
1834                 bsta->tfd_queue_msk |= BIT(queue);
1835
1836                 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1837                                    &cfg, wdg_timeout);
1838         }
1839
1840         if (vif->type == NL80211_IFTYPE_ADHOC)
1841                 baddr = vif->bss_conf.bssid;
1842
1843         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1844                 return -ENOSPC;
1845
1846         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1847                                          mvmvif->id, mvmvif->color);
1848         if (ret)
1849                 return ret;
1850
1851         /*
1852          * For a000 firmware and on we cannot add queue to a station unknown
1853          * to firmware so enable queue here - after the station was added
1854          */
1855         if (iwl_mvm_has_new_tx_api(mvm)) {
1856                 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1857                                                 bsta->sta_id,
1858                                                 IWL_MAX_TID_COUNT,
1859                                                 wdg_timeout);
1860
1861                 if (vif->type == NL80211_IFTYPE_AP ||
1862                     vif->type == NL80211_IFTYPE_ADHOC)
1863                         mvm->probe_queue = queue;
1864                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1865                         mvm->p2p_dev_queue = queue;
1866         }
1867
1868         return 0;
1869 }
1870
1871 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1872                                           struct ieee80211_vif *vif)
1873 {
1874         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1875         int queue;
1876
1877         lockdep_assert_held(&mvm->mutex);
1878
1879         iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
1880
1881         switch (vif->type) {
1882         case NL80211_IFTYPE_AP:
1883         case NL80211_IFTYPE_ADHOC:
1884                 queue = mvm->probe_queue;
1885                 break;
1886         case NL80211_IFTYPE_P2P_DEVICE:
1887                 queue = mvm->p2p_dev_queue;
1888                 break;
1889         default:
1890                 WARN(1, "Can't free bcast queue on vif type %d\n",
1891                      vif->type);
1892                 return;
1893         }
1894
1895         iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
1896         if (iwl_mvm_has_new_tx_api(mvm))
1897                 return;
1898
1899         WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
1900         mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
1901 }
1902
1903 /* Send the FW a request to remove the station from it's internal data
1904  * structures, but DO NOT remove the entry from the local data structures. */
1905 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1906 {
1907         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1908         int ret;
1909
1910         lockdep_assert_held(&mvm->mutex);
1911
1912         iwl_mvm_free_bcast_sta_queues(mvm, vif);
1913
1914         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1915         if (ret)
1916                 IWL_WARN(mvm, "Failed sending remove station\n");
1917         return ret;
1918 }
1919
1920 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1921 {
1922         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1923
1924         lockdep_assert_held(&mvm->mutex);
1925
1926         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
1927                                         ieee80211_vif_type_p2p(vif),
1928                                         IWL_STA_GENERAL_PURPOSE);
1929 }
1930
1931 /* Allocate a new station entry for the broadcast station to the given vif,
1932  * and send it to the FW.
1933  * Note that each P2P mac should have its own broadcast station.
1934  *
1935  * @mvm: the mvm component
1936  * @vif: the interface to which the broadcast station is added
1937  * @bsta: the broadcast station to add. */
1938 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1939 {
1940         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1941         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1942         int ret;
1943
1944         lockdep_assert_held(&mvm->mutex);
1945
1946         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1947         if (ret)
1948                 return ret;
1949
1950         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1951
1952         if (ret)
1953                 iwl_mvm_dealloc_int_sta(mvm, bsta);
1954
1955         return ret;
1956 }
1957
1958 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1959 {
1960         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1961
1962         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1963 }
1964
1965 /*
1966  * Send the FW a request to remove the station from it's internal data
1967  * structures, and in addition remove it from the local data structure.
1968  */
1969 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1970 {
1971         int ret;
1972
1973         lockdep_assert_held(&mvm->mutex);
1974
1975         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1976
1977         iwl_mvm_dealloc_bcast_sta(mvm, vif);
1978
1979         return ret;
1980 }
1981
1982 /*
1983  * Allocate a new station entry for the multicast station to the given vif,
1984  * and send it to the FW.
1985  * Note that each AP/GO mac should have its own multicast station.
1986  *
1987  * @mvm: the mvm component
1988  * @vif: the interface to which the multicast station is added
1989  */
1990 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1991 {
1992         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1993         struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
1994         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
1995         const u8 *maddr = _maddr;
1996         struct iwl_trans_txq_scd_cfg cfg = {
1997                 .fifo = IWL_MVM_TX_FIFO_MCAST,
1998                 .sta_id = msta->sta_id,
1999                 .tid = IWL_MAX_TID_COUNT,
2000                 .aggregate = false,
2001                 .frame_limit = IWL_FRAME_LIMIT,
2002         };
2003         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2004         int ret;
2005
2006         lockdep_assert_held(&mvm->mutex);
2007
2008         if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2009                     vif->type != NL80211_IFTYPE_ADHOC))
2010                 return -ENOTSUPP;
2011
2012         /*
2013          * While in previous FWs we had to exclude cab queue from TFD queue
2014          * mask, now it is needed as any other queue.
2015          */
2016         if (!iwl_mvm_has_new_tx_api(mvm) &&
2017             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2018                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2019                                    &cfg, timeout);
2020                 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2021         }
2022         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2023                                          mvmvif->id, mvmvif->color);
2024         if (ret) {
2025                 iwl_mvm_dealloc_int_sta(mvm, msta);
2026                 return ret;
2027         }
2028
2029         /*
2030          * Enable cab queue after the ADD_STA command is sent.
2031          * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2032          * command with unknown station id, and for FW that doesn't support
2033          * station API since the cab queue is not included in the
2034          * tfd_queue_mask.
2035          */
2036         if (iwl_mvm_has_new_tx_api(mvm)) {
2037                 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2038                                                     msta->sta_id,
2039                                                     IWL_MAX_TID_COUNT,
2040                                                     timeout);
2041                 mvmvif->cab_queue = queue;
2042         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2043                                IWL_UCODE_TLV_API_STA_TYPE)) {
2044                 /*
2045                  * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2046                  * invalid, so make sure we use the queue we want.
2047                  * Note that this is done here as we want to avoid making DQA
2048                  * changes in mac80211 layer.
2049                  */
2050                 if (vif->type == NL80211_IFTYPE_ADHOC) {
2051                         vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2052                         mvmvif->cab_queue = vif->cab_queue;
2053                 }
2054                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2055                                    &cfg, timeout);
2056         }
2057
2058         return 0;
2059 }
2060
2061 /*
2062  * Send the FW a request to remove the station from it's internal data
2063  * structures, and in addition remove it from the local data structure.
2064  */
2065 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2066 {
2067         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2068         int ret;
2069
2070         lockdep_assert_held(&mvm->mutex);
2071
2072         iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2073
2074         iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2075                             IWL_MAX_TID_COUNT, 0);
2076
2077         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2078         if (ret)
2079                 IWL_WARN(mvm, "Failed sending remove station\n");
2080
2081         return ret;
2082 }
2083
2084 #define IWL_MAX_RX_BA_SESSIONS 16
2085
2086 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2087 {
2088         struct iwl_mvm_delba_notif notif = {
2089                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2090                 .metadata.sync = 1,
2091                 .delba.baid = baid,
2092         };
2093         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2094 };
2095
2096 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2097                                  struct iwl_mvm_baid_data *data)
2098 {
2099         int i;
2100
2101         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2102
2103         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2104                 int j;
2105                 struct iwl_mvm_reorder_buffer *reorder_buf =
2106                         &data->reorder_buf[i];
2107
2108                 spin_lock_bh(&reorder_buf->lock);
2109                 if (likely(!reorder_buf->num_stored)) {
2110                         spin_unlock_bh(&reorder_buf->lock);
2111                         continue;
2112                 }
2113
2114                 /*
2115                  * This shouldn't happen in regular DELBA since the internal
2116                  * delBA notification should trigger a release of all frames in
2117                  * the reorder buffer.
2118                  */
2119                 WARN_ON(1);
2120
2121                 for (j = 0; j < reorder_buf->buf_size; j++)
2122                         __skb_queue_purge(&reorder_buf->entries[j]);
2123                 /*
2124                  * Prevent timer re-arm. This prevents a very far fetched case
2125                  * where we timed out on the notification. There may be prior
2126                  * RX frames pending in the RX queue before the notification
2127                  * that might get processed between now and the actual deletion
2128                  * and we would re-arm the timer although we are deleting the
2129                  * reorder buffer.
2130                  */
2131                 reorder_buf->removed = true;
2132                 spin_unlock_bh(&reorder_buf->lock);
2133                 del_timer_sync(&reorder_buf->reorder_timer);
2134         }
2135 }
2136
2137 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2138                                         u32 sta_id,
2139                                         struct iwl_mvm_baid_data *data,
2140                                         u16 ssn, u8 buf_size)
2141 {
2142         int i;
2143
2144         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2145                 struct iwl_mvm_reorder_buffer *reorder_buf =
2146                         &data->reorder_buf[i];
2147                 int j;
2148
2149                 reorder_buf->num_stored = 0;
2150                 reorder_buf->head_sn = ssn;
2151                 reorder_buf->buf_size = buf_size;
2152                 /* rx reorder timer */
2153                 reorder_buf->reorder_timer.function =
2154                         iwl_mvm_reorder_timer_expired;
2155                 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2156                 init_timer(&reorder_buf->reorder_timer);
2157                 spin_lock_init(&reorder_buf->lock);
2158                 reorder_buf->mvm = mvm;
2159                 reorder_buf->queue = i;
2160                 reorder_buf->sta_id = sta_id;
2161                 reorder_buf->valid = false;
2162                 for (j = 0; j < reorder_buf->buf_size; j++)
2163                         __skb_queue_head_init(&reorder_buf->entries[j]);
2164         }
2165 }
2166
2167 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2168                        int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2169 {
2170         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2171         struct iwl_mvm_add_sta_cmd cmd = {};
2172         struct iwl_mvm_baid_data *baid_data = NULL;
2173         int ret;
2174         u32 status;
2175
2176         lockdep_assert_held(&mvm->mutex);
2177
2178         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2179                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2180                 return -ENOSPC;
2181         }
2182
2183         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2184                 /*
2185                  * Allocate here so if allocation fails we can bail out early
2186                  * before starting the BA session in the firmware
2187                  */
2188                 baid_data = kzalloc(sizeof(*baid_data) +
2189                                     mvm->trans->num_rx_queues *
2190                                     sizeof(baid_data->reorder_buf[0]),
2191                                     GFP_KERNEL);
2192                 if (!baid_data)
2193                         return -ENOMEM;
2194         }
2195
2196         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2197         cmd.sta_id = mvm_sta->sta_id;
2198         cmd.add_modify = STA_MODE_MODIFY;
2199         if (start) {
2200                 cmd.add_immediate_ba_tid = (u8) tid;
2201                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2202                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2203         } else {
2204                 cmd.remove_immediate_ba_tid = (u8) tid;
2205         }
2206         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2207                                   STA_MODIFY_REMOVE_BA_TID;
2208
2209         status = ADD_STA_SUCCESS;
2210         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2211                                           iwl_mvm_add_sta_cmd_size(mvm),
2212                                           &cmd, &status);
2213         if (ret)
2214                 goto out_free;
2215
2216         switch (status & IWL_ADD_STA_STATUS_MASK) {
2217         case ADD_STA_SUCCESS:
2218                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2219                              start ? "start" : "stopp");
2220                 break;
2221         case ADD_STA_IMMEDIATE_BA_FAILURE:
2222                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2223                 ret = -ENOSPC;
2224                 break;
2225         default:
2226                 ret = -EIO;
2227                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2228                         start ? "start" : "stopp", status);
2229                 break;
2230         }
2231
2232         if (ret)
2233                 goto out_free;
2234
2235         if (start) {
2236                 u8 baid;
2237
2238                 mvm->rx_ba_sessions++;
2239
2240                 if (!iwl_mvm_has_new_rx_api(mvm))
2241                         return 0;
2242
2243                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2244                         ret = -EINVAL;
2245                         goto out_free;
2246                 }
2247                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2248                             IWL_ADD_STA_BAID_SHIFT);
2249                 baid_data->baid = baid;
2250                 baid_data->timeout = timeout;
2251                 baid_data->last_rx = jiffies;
2252                 setup_timer(&baid_data->session_timer,
2253                             iwl_mvm_rx_agg_session_expired,
2254                             (unsigned long)&mvm->baid_map[baid]);
2255                 baid_data->mvm = mvm;
2256                 baid_data->tid = tid;
2257                 baid_data->sta_id = mvm_sta->sta_id;
2258
2259                 mvm_sta->tid_to_baid[tid] = baid;
2260                 if (timeout)
2261                         mod_timer(&baid_data->session_timer,
2262                                   TU_TO_EXP_TIME(timeout * 2));
2263
2264                 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2265                                             baid_data, ssn, buf_size);
2266                 /*
2267                  * protect the BA data with RCU to cover a case where our
2268                  * internal RX sync mechanism will timeout (not that it's
2269                  * supposed to happen) and we will free the session data while
2270                  * RX is being processed in parallel
2271                  */
2272                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2273                              mvm_sta->sta_id, tid, baid);
2274                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2275                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2276         } else  {
2277                 u8 baid = mvm_sta->tid_to_baid[tid];
2278
2279                 if (mvm->rx_ba_sessions > 0)
2280                         /* check that restart flow didn't zero the counter */
2281                         mvm->rx_ba_sessions--;
2282                 if (!iwl_mvm_has_new_rx_api(mvm))
2283                         return 0;
2284
2285                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2286                         return -EINVAL;
2287
2288                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2289                 if (WARN_ON(!baid_data))
2290                         return -EINVAL;
2291
2292                 /* synchronize all rx queues so we can safely delete */
2293                 iwl_mvm_free_reorder(mvm, baid_data);
2294                 del_timer_sync(&baid_data->session_timer);
2295                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2296                 kfree_rcu(baid_data, rcu_head);
2297                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2298         }
2299         return 0;
2300
2301 out_free:
2302         kfree(baid_data);
2303         return ret;
2304 }
2305
2306 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2307                        int tid, u8 queue, bool start)
2308 {
2309         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2310         struct iwl_mvm_add_sta_cmd cmd = {};
2311         int ret;
2312         u32 status;
2313
2314         lockdep_assert_held(&mvm->mutex);
2315
2316         if (start) {
2317                 mvm_sta->tfd_queue_msk |= BIT(queue);
2318                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2319         } else {
2320                 /* In DQA-mode the queue isn't removed on agg termination */
2321                 mvm_sta->tid_disable_agg |= BIT(tid);
2322         }
2323
2324         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2325         cmd.sta_id = mvm_sta->sta_id;
2326         cmd.add_modify = STA_MODE_MODIFY;
2327         if (!iwl_mvm_has_new_tx_api(mvm))
2328                 cmd.modify_mask = STA_MODIFY_QUEUES;
2329         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2330         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2331         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2332
2333         status = ADD_STA_SUCCESS;
2334         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2335                                           iwl_mvm_add_sta_cmd_size(mvm),
2336                                           &cmd, &status);
2337         if (ret)
2338                 return ret;
2339
2340         switch (status & IWL_ADD_STA_STATUS_MASK) {
2341         case ADD_STA_SUCCESS:
2342                 break;
2343         default:
2344                 ret = -EIO;
2345                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2346                         start ? "start" : "stopp", status);
2347                 break;
2348         }
2349
2350         return ret;
2351 }
2352
2353 const u8 tid_to_mac80211_ac[] = {
2354         IEEE80211_AC_BE,
2355         IEEE80211_AC_BK,
2356         IEEE80211_AC_BK,
2357         IEEE80211_AC_BE,
2358         IEEE80211_AC_VI,
2359         IEEE80211_AC_VI,
2360         IEEE80211_AC_VO,
2361         IEEE80211_AC_VO,
2362         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2363 };
2364
2365 static const u8 tid_to_ucode_ac[] = {
2366         AC_BE,
2367         AC_BK,
2368         AC_BK,
2369         AC_BE,
2370         AC_VI,
2371         AC_VI,
2372         AC_VO,
2373         AC_VO,
2374 };
2375
2376 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2377                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2378 {
2379         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2380         struct iwl_mvm_tid_data *tid_data;
2381         u16 normalized_ssn;
2382         int txq_id;
2383         int ret;
2384
2385         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2386                 return -EINVAL;
2387
2388         if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2389             mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2390                 IWL_ERR(mvm,
2391                         "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2392                         mvmsta->tid_data[tid].state);
2393                 return -ENXIO;
2394         }
2395
2396         lockdep_assert_held(&mvm->mutex);
2397
2398         spin_lock_bh(&mvmsta->lock);
2399
2400         /* possible race condition - we entered D0i3 while starting agg */
2401         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2402                 spin_unlock_bh(&mvmsta->lock);
2403                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2404                 return -EIO;
2405         }
2406
2407         spin_lock(&mvm->queue_info_lock);
2408
2409         /*
2410          * Note the possible cases:
2411          *  1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2412          *  2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2413          *      one and mark it as reserved
2414          *  3. In DQA mode, but no traffic yet on this TID: same treatment as in
2415          *      non-DQA mode, since the TXQ hasn't yet been allocated
2416          * Don't support case 3 for new TX path as it is not expected to happen
2417          * and aggregation will be offloaded soon anyway
2418          */
2419         txq_id = mvmsta->tid_data[tid].txq_id;
2420         if (iwl_mvm_has_new_tx_api(mvm)) {
2421                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2422                         ret = -ENXIO;
2423                         goto release_locks;
2424                 }
2425         } else if (unlikely(mvm->queue_info[txq_id].status ==
2426                             IWL_MVM_QUEUE_SHARED)) {
2427                 ret = -ENXIO;
2428                 IWL_DEBUG_TX_QUEUES(mvm,
2429                                     "Can't start tid %d agg on shared queue!\n",
2430                                     tid);
2431                 goto release_locks;
2432         } else if (mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2433                 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2434                                                  IWL_MVM_DQA_MIN_DATA_QUEUE,
2435                                                  IWL_MVM_DQA_MAX_DATA_QUEUE);
2436                 if (txq_id < 0) {
2437                         ret = txq_id;
2438                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2439                         goto release_locks;
2440                 }
2441                 /*
2442                  * TXQ shouldn't be in inactive mode for non-DQA, so getting
2443                  * an inactive queue from iwl_mvm_find_free_queue() is
2444                  * certainly a bug
2445                  */
2446                 WARN_ON(mvm->queue_info[txq_id].status ==
2447                         IWL_MVM_QUEUE_INACTIVE);
2448
2449                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2450                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2451         }
2452
2453         spin_unlock(&mvm->queue_info_lock);
2454
2455         IWL_DEBUG_TX_QUEUES(mvm,
2456                             "AGG for tid %d will be on queue #%d\n",
2457                             tid, txq_id);
2458
2459         tid_data = &mvmsta->tid_data[tid];
2460         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2461         tid_data->txq_id = txq_id;
2462         *ssn = tid_data->ssn;
2463
2464         IWL_DEBUG_TX_QUEUES(mvm,
2465                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2466                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2467                             tid_data->next_reclaimed);
2468
2469         /*
2470          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
2471          * to align the wrap around of ssn so we compare relevant values.
2472          */
2473         normalized_ssn = tid_data->ssn;
2474         if (mvm->trans->cfg->gen2)
2475                 normalized_ssn &= 0xff;
2476
2477         if (normalized_ssn == tid_data->next_reclaimed) {
2478                 tid_data->state = IWL_AGG_STARTING;
2479                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2480         } else {
2481                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2482         }
2483
2484         ret = 0;
2485         goto out;
2486
2487 release_locks:
2488         spin_unlock(&mvm->queue_info_lock);
2489 out:
2490         spin_unlock_bh(&mvmsta->lock);
2491
2492         return ret;
2493 }
2494
2495 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2496                             struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2497                             bool amsdu)
2498 {
2499         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2500         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2501         unsigned int wdg_timeout =
2502                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2503         int queue, ret;
2504         bool alloc_queue = true;
2505         enum iwl_mvm_queue_status queue_status;
2506         u16 ssn;
2507
2508         struct iwl_trans_txq_scd_cfg cfg = {
2509                 .sta_id = mvmsta->sta_id,
2510                 .tid = tid,
2511                 .frame_limit = buf_size,
2512                 .aggregate = true,
2513         };
2514
2515         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2516                      != IWL_MAX_TID_COUNT);
2517
2518         if (!mvm->trans->cfg->gen2)
2519                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2520         else
2521                 buf_size = min_t(int, buf_size,
2522                                  LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF);
2523
2524         spin_lock_bh(&mvmsta->lock);
2525         ssn = tid_data->ssn;
2526         queue = tid_data->txq_id;
2527         tid_data->state = IWL_AGG_ON;
2528         mvmsta->agg_tids |= BIT(tid);
2529         tid_data->ssn = 0xffff;
2530         tid_data->amsdu_in_ampdu_allowed = amsdu;
2531         spin_unlock_bh(&mvmsta->lock);
2532
2533         if (iwl_mvm_has_new_tx_api(mvm)) {
2534                 /*
2535                  * If no queue iwl_mvm_sta_tx_agg_start() would have failed so
2536                  * no need to check queue's status
2537                  */
2538                 if (buf_size < mvmsta->max_agg_bufsize)
2539                         return -ENOTSUPP;
2540
2541                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2542                 if (ret)
2543                         return -EIO;
2544                 goto out;
2545         }
2546
2547         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2548
2549         spin_lock_bh(&mvm->queue_info_lock);
2550         queue_status = mvm->queue_info[queue].status;
2551         spin_unlock_bh(&mvm->queue_info_lock);
2552
2553         /* Maybe there is no need to even alloc a queue... */
2554         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2555                 alloc_queue = false;
2556
2557         /*
2558          * Only reconfig the SCD for the queue if the window size has
2559          * changed from current (become smaller)
2560          */
2561         if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2562                 /*
2563                  * If reconfiguring an existing queue, it first must be
2564                  * drained
2565                  */
2566                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2567                                                      BIT(queue));
2568                 if (ret) {
2569                         IWL_ERR(mvm,
2570                                 "Error draining queue before reconfig\n");
2571                         return ret;
2572                 }
2573
2574                 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2575                                            mvmsta->sta_id, tid,
2576                                            buf_size, ssn);
2577                 if (ret) {
2578                         IWL_ERR(mvm,
2579                                 "Error reconfiguring TXQ #%d\n", queue);
2580                         return ret;
2581                 }
2582         }
2583
2584         if (alloc_queue)
2585                 iwl_mvm_enable_txq(mvm, queue,
2586                                    vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2587                                    &cfg, wdg_timeout);
2588
2589         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2590         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2591                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2592                 if (ret)
2593                         return -EIO;
2594         }
2595
2596         /* No need to mark as reserved */
2597         spin_lock_bh(&mvm->queue_info_lock);
2598         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2599         spin_unlock_bh(&mvm->queue_info_lock);
2600
2601 out:
2602         /*
2603          * Even though in theory the peer could have different
2604          * aggregation reorder buffer sizes for different sessions,
2605          * our ucode doesn't allow for that and has a global limit
2606          * for each station. Therefore, use the minimum of all the
2607          * aggregation sessions and our default value.
2608          */
2609         mvmsta->max_agg_bufsize =
2610                 min(mvmsta->max_agg_bufsize, buf_size);
2611         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2612
2613         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2614                      sta->addr, tid);
2615
2616         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2617 }
2618
2619 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2620                                         struct iwl_mvm_sta *mvmsta,
2621                                         u16 txq_id)
2622 {
2623         if (iwl_mvm_has_new_tx_api(mvm))
2624                 return;
2625
2626         spin_lock_bh(&mvm->queue_info_lock);
2627         /*
2628          * The TXQ is marked as reserved only if no traffic came through yet
2629          * This means no traffic has been sent on this TID (agg'd or not), so
2630          * we no longer have use for the queue. Since it hasn't even been
2631          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2632          * free.
2633          */
2634         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2635                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2636
2637         spin_unlock_bh(&mvm->queue_info_lock);
2638 }
2639
2640 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2641                             struct ieee80211_sta *sta, u16 tid)
2642 {
2643         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2644         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2645         u16 txq_id;
2646         int err;
2647
2648         /*
2649          * If mac80211 is cleaning its state, then say that we finished since
2650          * our state has been cleared anyway.
2651          */
2652         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2653                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2654                 return 0;
2655         }
2656
2657         spin_lock_bh(&mvmsta->lock);
2658
2659         txq_id = tid_data->txq_id;
2660
2661         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2662                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2663
2664         mvmsta->agg_tids &= ~BIT(tid);
2665
2666         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2667
2668         switch (tid_data->state) {
2669         case IWL_AGG_ON:
2670                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2671
2672                 IWL_DEBUG_TX_QUEUES(mvm,
2673                                     "ssn = %d, next_recl = %d\n",
2674                                     tid_data->ssn, tid_data->next_reclaimed);
2675
2676                 tid_data->ssn = 0xffff;
2677                 tid_data->state = IWL_AGG_OFF;
2678                 spin_unlock_bh(&mvmsta->lock);
2679
2680                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2681
2682                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2683                 return 0;
2684         case IWL_AGG_STARTING:
2685         case IWL_EMPTYING_HW_QUEUE_ADDBA:
2686                 /*
2687                  * The agg session has been stopped before it was set up. This
2688                  * can happen when the AddBA timer times out for example.
2689                  */
2690
2691                 /* No barriers since we are under mutex */
2692                 lockdep_assert_held(&mvm->mutex);
2693
2694                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2695                 tid_data->state = IWL_AGG_OFF;
2696                 err = 0;
2697                 break;
2698         default:
2699                 IWL_ERR(mvm,
2700                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2701                         mvmsta->sta_id, tid, tid_data->state);
2702                 IWL_ERR(mvm,
2703                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2704                 err = -EINVAL;
2705         }
2706
2707         spin_unlock_bh(&mvmsta->lock);
2708
2709         return err;
2710 }
2711
2712 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2713                             struct ieee80211_sta *sta, u16 tid)
2714 {
2715         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2716         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2717         u16 txq_id;
2718         enum iwl_mvm_agg_state old_state;
2719
2720         /*
2721          * First set the agg state to OFF to avoid calling
2722          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2723          */
2724         spin_lock_bh(&mvmsta->lock);
2725         txq_id = tid_data->txq_id;
2726         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2727                             mvmsta->sta_id, tid, txq_id, tid_data->state);
2728         old_state = tid_data->state;
2729         tid_data->state = IWL_AGG_OFF;
2730         mvmsta->agg_tids &= ~BIT(tid);
2731         spin_unlock_bh(&mvmsta->lock);
2732
2733         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2734
2735         if (old_state >= IWL_AGG_ON) {
2736                 iwl_mvm_drain_sta(mvm, mvmsta, true);
2737
2738                 if (iwl_mvm_has_new_tx_api(mvm)) {
2739                         if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2740                                                    BIT(tid), 0))
2741                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2742                         iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2743                 } else {
2744                         if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2745                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2746                         iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2747                 }
2748
2749                 iwl_mvm_drain_sta(mvm, mvmsta, false);
2750
2751                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2752         }
2753
2754         return 0;
2755 }
2756
2757 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2758 {
2759         int i, max = -1, max_offs = -1;
2760
2761         lockdep_assert_held(&mvm->mutex);
2762
2763         /* Pick the unused key offset with the highest 'deleted'
2764          * counter. Every time a key is deleted, all the counters
2765          * are incremented and the one that was just deleted is
2766          * reset to zero. Thus, the highest counter is the one
2767          * that was deleted longest ago. Pick that one.
2768          */
2769         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2770                 if (test_bit(i, mvm->fw_key_table))
2771                         continue;
2772                 if (mvm->fw_key_deleted[i] > max) {
2773                         max = mvm->fw_key_deleted[i];
2774                         max_offs = i;
2775                 }
2776         }
2777
2778         if (max_offs < 0)
2779                 return STA_KEY_IDX_INVALID;
2780
2781         return max_offs;
2782 }
2783
2784 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2785                                                struct ieee80211_vif *vif,
2786                                                struct ieee80211_sta *sta)
2787 {
2788         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2789
2790         if (sta)
2791                 return iwl_mvm_sta_from_mac80211(sta);
2792
2793         /*
2794          * The device expects GTKs for station interfaces to be
2795          * installed as GTKs for the AP station. If we have no
2796          * station ID, then use AP's station ID.
2797          */
2798         if (vif->type == NL80211_IFTYPE_STATION &&
2799             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2800                 u8 sta_id = mvmvif->ap_sta_id;
2801
2802                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2803                                             lockdep_is_held(&mvm->mutex));
2804
2805                 /*
2806                  * It is possible that the 'sta' parameter is NULL,
2807                  * for example when a GTK is removed - the sta_id will then
2808                  * be the AP ID, and no station was passed by mac80211.
2809                  */
2810                 if (IS_ERR_OR_NULL(sta))
2811                         return NULL;
2812
2813                 return iwl_mvm_sta_from_mac80211(sta);
2814         }
2815
2816         return NULL;
2817 }
2818
2819 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2820                                 u32 sta_id,
2821                                 struct ieee80211_key_conf *key, bool mcast,
2822                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2823                                 u8 key_offset)
2824 {
2825         union {
2826                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2827                 struct iwl_mvm_add_sta_key_cmd cmd;
2828         } u = {};
2829         __le16 key_flags;
2830         int ret;
2831         u32 status;
2832         u16 keyidx;
2833         u64 pn = 0;
2834         int i, size;
2835         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2836                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2837
2838         if (sta_id == IWL_MVM_INVALID_STA)
2839                 return -EINVAL;
2840
2841         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2842                  STA_KEY_FLG_KEYID_MSK;
2843         key_flags = cpu_to_le16(keyidx);
2844         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2845
2846         switch (key->cipher) {
2847         case WLAN_CIPHER_SUITE_TKIP:
2848                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2849                 if (new_api) {
2850                         memcpy((void *)&u.cmd.tx_mic_key,
2851                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2852                                IWL_MIC_KEY_SIZE);
2853
2854                         memcpy((void *)&u.cmd.rx_mic_key,
2855                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2856                                IWL_MIC_KEY_SIZE);
2857                         pn = atomic64_read(&key->tx_pn);
2858
2859                 } else {
2860                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2861                         for (i = 0; i < 5; i++)
2862                                 u.cmd_v1.tkip_rx_ttak[i] =
2863                                         cpu_to_le16(tkip_p1k[i]);
2864                 }
2865                 memcpy(u.cmd.common.key, key->key, key->keylen);
2866                 break;
2867         case WLAN_CIPHER_SUITE_CCMP:
2868                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2869                 memcpy(u.cmd.common.key, key->key, key->keylen);
2870                 if (new_api)
2871                         pn = atomic64_read(&key->tx_pn);
2872                 break;
2873         case WLAN_CIPHER_SUITE_WEP104:
2874                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2875                 /* fall through */
2876         case WLAN_CIPHER_SUITE_WEP40:
2877                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2878                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2879                 break;
2880         case WLAN_CIPHER_SUITE_GCMP_256:
2881                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2882                 /* fall through */
2883         case WLAN_CIPHER_SUITE_GCMP:
2884                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2885                 memcpy(u.cmd.common.key, key->key, key->keylen);
2886                 if (new_api)
2887                         pn = atomic64_read(&key->tx_pn);
2888                 break;
2889         default:
2890                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2891                 memcpy(u.cmd.common.key, key->key, key->keylen);
2892         }
2893
2894         if (mcast)
2895                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2896
2897         u.cmd.common.key_offset = key_offset;
2898         u.cmd.common.key_flags = key_flags;
2899         u.cmd.common.sta_id = sta_id;
2900
2901         if (new_api) {
2902                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
2903                 size = sizeof(u.cmd);
2904         } else {
2905                 size = sizeof(u.cmd_v1);
2906         }
2907
2908         status = ADD_STA_SUCCESS;
2909         if (cmd_flags & CMD_ASYNC)
2910                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
2911                                            &u.cmd);
2912         else
2913                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
2914                                                   &u.cmd, &status);
2915
2916         switch (status) {
2917         case ADD_STA_SUCCESS:
2918                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2919                 break;
2920         default:
2921                 ret = -EIO;
2922                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
2923                 break;
2924         }
2925
2926         return ret;
2927 }
2928
2929 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
2930                                  struct ieee80211_key_conf *keyconf,
2931                                  u8 sta_id, bool remove_key)
2932 {
2933         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
2934
2935         /* verify the key details match the required command's expectations */
2936         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
2937                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
2938                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
2939                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
2940                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
2941                 return -EINVAL;
2942
2943         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
2944                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
2945                 return -EINVAL;
2946
2947         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
2948         igtk_cmd.sta_id = cpu_to_le32(sta_id);
2949
2950         if (remove_key) {
2951                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
2952         } else {
2953                 struct ieee80211_key_seq seq;
2954                 const u8 *pn;
2955
2956                 switch (keyconf->cipher) {
2957                 case WLAN_CIPHER_SUITE_AES_CMAC:
2958                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
2959                         break;
2960                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2961                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2962                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
2963                         break;
2964                 default:
2965                         return -EINVAL;
2966                 }
2967
2968                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
2969                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2970                         igtk_cmd.ctrl_flags |=
2971                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
2972                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2973                 pn = seq.aes_cmac.pn;
2974                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
2975                                                        ((u64) pn[4] << 8) |
2976                                                        ((u64) pn[3] << 16) |
2977                                                        ((u64) pn[2] << 24) |
2978                                                        ((u64) pn[1] << 32) |
2979                                                        ((u64) pn[0] << 40));
2980         }
2981
2982         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
2983                        remove_key ? "removing" : "installing",
2984                        igtk_cmd.sta_id);
2985
2986         if (!iwl_mvm_has_new_rx_api(mvm)) {
2987                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
2988                         .ctrl_flags = igtk_cmd.ctrl_flags,
2989                         .key_id = igtk_cmd.key_id,
2990                         .sta_id = igtk_cmd.sta_id,
2991                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
2992                 };
2993
2994                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
2995                        ARRAY_SIZE(igtk_cmd_v1.igtk));
2996                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2997                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
2998         }
2999         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3000                                     sizeof(igtk_cmd), &igtk_cmd);
3001 }
3002
3003
3004 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3005                                        struct ieee80211_vif *vif,
3006                                        struct ieee80211_sta *sta)
3007 {
3008         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3009
3010         if (sta)
3011                 return sta->addr;
3012
3013         if (vif->type == NL80211_IFTYPE_STATION &&
3014             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3015                 u8 sta_id = mvmvif->ap_sta_id;
3016                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3017                                                 lockdep_is_held(&mvm->mutex));
3018                 return sta->addr;
3019         }
3020
3021
3022         return NULL;
3023 }
3024
3025 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3026                                  struct ieee80211_vif *vif,
3027                                  struct ieee80211_sta *sta,
3028                                  struct ieee80211_key_conf *keyconf,
3029                                  u8 key_offset,
3030                                  bool mcast)
3031 {
3032         int ret;
3033         const u8 *addr;
3034         struct ieee80211_key_seq seq;
3035         u16 p1k[5];
3036         u32 sta_id;
3037
3038         if (sta) {
3039                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3040
3041                 sta_id = mvm_sta->sta_id;
3042         } else if (vif->type == NL80211_IFTYPE_AP &&
3043                    !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3044                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3045
3046                 sta_id = mvmvif->mcast_sta.sta_id;
3047         } else {
3048                 IWL_ERR(mvm, "Failed to find station id\n");
3049                 return -EINVAL;
3050         }
3051
3052         switch (keyconf->cipher) {
3053         case WLAN_CIPHER_SUITE_TKIP:
3054                 if (vif->type == NL80211_IFTYPE_AP) {
3055                         ret = -EINVAL;
3056                         break;
3057                 }
3058                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3059                 /* get phase 1 key from mac80211 */
3060                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3061                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3062                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3063                                            seq.tkip.iv32, p1k, 0, key_offset);
3064                 break;
3065         case WLAN_CIPHER_SUITE_CCMP:
3066         case WLAN_CIPHER_SUITE_WEP40:
3067         case WLAN_CIPHER_SUITE_WEP104:
3068         case WLAN_CIPHER_SUITE_GCMP:
3069         case WLAN_CIPHER_SUITE_GCMP_256:
3070                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3071                                            0, NULL, 0, key_offset);
3072                 break;
3073         default:
3074                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3075                                            0, NULL, 0, key_offset);
3076         }
3077
3078         return ret;
3079 }
3080
3081 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3082                                     struct ieee80211_key_conf *keyconf,
3083                                     bool mcast)
3084 {
3085         union {
3086                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3087                 struct iwl_mvm_add_sta_key_cmd cmd;
3088         } u = {};
3089         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3090                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3091         __le16 key_flags;
3092         int ret, size;
3093         u32 status;
3094
3095         if (sta_id == IWL_MVM_INVALID_STA)
3096                 return -EINVAL;
3097
3098         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3099                                  STA_KEY_FLG_KEYID_MSK);
3100         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3101         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3102
3103         if (mcast)
3104                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3105
3106         /*
3107          * The fields assigned here are in the same location at the start
3108          * of the command, so we can do this union trick.
3109          */
3110         u.cmd.common.key_flags = key_flags;
3111         u.cmd.common.key_offset = keyconf->hw_key_idx;
3112         u.cmd.common.sta_id = sta_id;
3113
3114         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3115
3116         status = ADD_STA_SUCCESS;
3117         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3118                                           &status);
3119
3120         switch (status) {
3121         case ADD_STA_SUCCESS:
3122                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3123                 break;
3124         default:
3125                 ret = -EIO;
3126                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3127                 break;
3128         }
3129
3130         return ret;
3131 }
3132
3133 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3134                         struct ieee80211_vif *vif,
3135                         struct ieee80211_sta *sta,
3136                         struct ieee80211_key_conf *keyconf,
3137                         u8 key_offset)
3138 {
3139         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3140         struct iwl_mvm_sta *mvm_sta;
3141         u8 sta_id = IWL_MVM_INVALID_STA;
3142         int ret;
3143         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3144
3145         lockdep_assert_held(&mvm->mutex);
3146
3147         if (vif->type != NL80211_IFTYPE_AP ||
3148             keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3149                 /* Get the station id from the mvm local station table */
3150                 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3151                 if (!mvm_sta) {
3152                         IWL_ERR(mvm, "Failed to find station\n");
3153                         return -EINVAL;
3154                 }
3155                 sta_id = mvm_sta->sta_id;
3156
3157                 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3158                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3159                     keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3160                         ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id,
3161                                                     false);
3162                         goto end;
3163                 }
3164
3165                 /*
3166                  * It is possible that the 'sta' parameter is NULL, and thus
3167                  * there is a need to retrieve  the sta from the local station
3168                  * table.
3169                  */
3170                 if (!sta) {
3171                         sta = rcu_dereference_protected(
3172                                 mvm->fw_id_to_mac_id[sta_id],
3173                                 lockdep_is_held(&mvm->mutex));
3174                         if (IS_ERR_OR_NULL(sta)) {
3175                                 IWL_ERR(mvm, "Invalid station id\n");
3176                                 return -EINVAL;
3177                         }
3178                 }
3179
3180                 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3181                         return -EINVAL;
3182         }
3183
3184         /* If the key_offset is not pre-assigned, we need to find a
3185          * new offset to use.  In normal cases, the offset is not
3186          * pre-assigned, but during HW_RESTART we want to reuse the
3187          * same indices, so we pass them when this function is called.
3188          *
3189          * In D3 entry, we need to hardcoded the indices (because the
3190          * firmware hardcodes the PTK offset to 0).  In this case, we
3191          * need to make sure we don't overwrite the hw_key_idx in the
3192          * keyconf structure, because otherwise we cannot configure
3193          * the original ones back when resuming.
3194          */
3195         if (key_offset == STA_KEY_IDX_INVALID) {
3196                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3197                 if (key_offset == STA_KEY_IDX_INVALID)
3198                         return -ENOSPC;
3199                 keyconf->hw_key_idx = key_offset;
3200         }
3201
3202         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3203         if (ret)
3204                 goto end;
3205
3206         /*
3207          * For WEP, the same key is used for multicast and unicast. Upload it
3208          * again, using the same key offset, and now pointing the other one
3209          * to the same key slot (offset).
3210          * If this fails, remove the original as well.
3211          */
3212         if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3213              keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3214             sta) {
3215                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3216                                             key_offset, !mcast);
3217                 if (ret) {
3218                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3219                         goto end;
3220                 }
3221         }
3222
3223         __set_bit(key_offset, mvm->fw_key_table);
3224
3225 end:
3226         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3227                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3228                       sta ? sta->addr : zero_addr, ret);
3229         return ret;
3230 }
3231
3232 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3233                            struct ieee80211_vif *vif,
3234                            struct ieee80211_sta *sta,
3235                            struct ieee80211_key_conf *keyconf)
3236 {
3237         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3238         struct iwl_mvm_sta *mvm_sta;
3239         u8 sta_id = IWL_MVM_INVALID_STA;
3240         int ret, i;
3241
3242         lockdep_assert_held(&mvm->mutex);
3243
3244         /* Get the station from the mvm local station table */
3245         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3246         if (mvm_sta)
3247                 sta_id = mvm_sta->sta_id;
3248         else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3249                 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3250
3251
3252         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3253                       keyconf->keyidx, sta_id);
3254
3255         if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3256                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3257                         keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3258                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3259
3260         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3261                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3262                         keyconf->hw_key_idx);
3263                 return -ENOENT;
3264         }
3265
3266         /* track which key was deleted last */
3267         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3268                 if (mvm->fw_key_deleted[i] < U8_MAX)
3269                         mvm->fw_key_deleted[i]++;
3270         }
3271         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3272
3273         if (sta && !mvm_sta) {
3274                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3275                 return 0;
3276         }
3277
3278         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3279         if (ret)
3280                 return ret;
3281
3282         /* delete WEP key twice to get rid of (now useless) offset */
3283         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3284             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3285                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3286
3287         return ret;
3288 }
3289
3290 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3291                              struct ieee80211_vif *vif,
3292                              struct ieee80211_key_conf *keyconf,
3293                              struct ieee80211_sta *sta, u32 iv32,
3294                              u16 *phase1key)
3295 {
3296         struct iwl_mvm_sta *mvm_sta;
3297         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3298
3299         rcu_read_lock();
3300
3301         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3302         if (WARN_ON_ONCE(!mvm_sta))
3303                 goto unlock;
3304         iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3305                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3306
3307  unlock:
3308         rcu_read_unlock();
3309 }
3310
3311 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3312                                 struct ieee80211_sta *sta)
3313 {
3314         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3315         struct iwl_mvm_add_sta_cmd cmd = {
3316                 .add_modify = STA_MODE_MODIFY,
3317                 .sta_id = mvmsta->sta_id,
3318                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3319                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3320         };
3321         int ret;
3322
3323         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3324                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3325         if (ret)
3326                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3327 }
3328
3329 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3330                                        struct ieee80211_sta *sta,
3331                                        enum ieee80211_frame_release_type reason,
3332                                        u16 cnt, u16 tids, bool more_data,
3333                                        bool single_sta_queue)
3334 {
3335         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3336         struct iwl_mvm_add_sta_cmd cmd = {
3337                 .add_modify = STA_MODE_MODIFY,
3338                 .sta_id = mvmsta->sta_id,
3339                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3340                 .sleep_tx_count = cpu_to_le16(cnt),
3341                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3342         };
3343         int tid, ret;
3344         unsigned long _tids = tids;
3345
3346         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3347          * Note that this field is reserved and unused by firmware not
3348          * supporting GO uAPSD, so it's safe to always do this.
3349          */
3350         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3351                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3352
3353         /* If we're releasing frames from aggregation or dqa queues then check
3354          * if all the queues that we're releasing frames from, combined, have:
3355          *  - more frames than the service period, in which case more_data
3356          *    needs to be set
3357          *  - fewer than 'cnt' frames, in which case we need to adjust the
3358          *    firmware command (but do that unconditionally)
3359          */
3360         if (single_sta_queue) {
3361                 int remaining = cnt;
3362                 int sleep_tx_count;
3363
3364                 spin_lock_bh(&mvmsta->lock);
3365                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3366                         struct iwl_mvm_tid_data *tid_data;
3367                         u16 n_queued;
3368
3369                         tid_data = &mvmsta->tid_data[tid];
3370
3371                         n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3372                         if (n_queued > remaining) {
3373                                 more_data = true;
3374                                 remaining = 0;
3375                                 break;
3376                         }
3377                         remaining -= n_queued;
3378                 }
3379                 sleep_tx_count = cnt - remaining;
3380                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3381                         mvmsta->sleep_tx_count = sleep_tx_count;
3382                 spin_unlock_bh(&mvmsta->lock);
3383
3384                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3385                 if (WARN_ON(cnt - remaining == 0)) {
3386                         ieee80211_sta_eosp(sta);
3387                         return;
3388                 }
3389         }
3390
3391         /* Note: this is ignored by firmware not supporting GO uAPSD */
3392         if (more_data)
3393                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3394
3395         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3396                 mvmsta->next_status_eosp = true;
3397                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3398         } else {
3399                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3400         }
3401
3402         /* block the Tx queues until the FW updated the sleep Tx count */
3403         iwl_trans_block_txq_ptrs(mvm->trans, true);
3404
3405         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3406                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3407                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3408         if (ret)
3409                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3410 }
3411
3412 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3413                            struct iwl_rx_cmd_buffer *rxb)
3414 {
3415         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3416         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3417         struct ieee80211_sta *sta;
3418         u32 sta_id = le32_to_cpu(notif->sta_id);
3419
3420         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3421                 return;
3422
3423         rcu_read_lock();
3424         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3425         if (!IS_ERR_OR_NULL(sta))
3426                 ieee80211_sta_eosp(sta);
3427         rcu_read_unlock();
3428 }
3429
3430 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3431                                    struct iwl_mvm_sta *mvmsta, bool disable)
3432 {
3433         struct iwl_mvm_add_sta_cmd cmd = {
3434                 .add_modify = STA_MODE_MODIFY,
3435                 .sta_id = mvmsta->sta_id,
3436                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3437                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3438                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3439         };
3440         int ret;
3441
3442         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3443                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3444         if (ret)
3445                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3446 }
3447
3448 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3449                                       struct ieee80211_sta *sta,
3450                                       bool disable)
3451 {
3452         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3453
3454         spin_lock_bh(&mvm_sta->lock);
3455
3456         if (mvm_sta->disable_tx == disable) {
3457                 spin_unlock_bh(&mvm_sta->lock);
3458                 return;
3459         }
3460
3461         mvm_sta->disable_tx = disable;
3462
3463         /* Tell mac80211 to start/stop queuing tx for this station */
3464         ieee80211_sta_block_awake(mvm->hw, sta, disable);
3465
3466         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3467
3468         spin_unlock_bh(&mvm_sta->lock);
3469 }
3470
3471 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3472                                               struct iwl_mvm_vif *mvmvif,
3473                                               struct iwl_mvm_int_sta *sta,
3474                                               bool disable)
3475 {
3476         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3477         struct iwl_mvm_add_sta_cmd cmd = {
3478                 .add_modify = STA_MODE_MODIFY,
3479                 .sta_id = sta->sta_id,
3480                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3481                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3482                 .mac_id_n_color = cpu_to_le32(id),
3483         };
3484         int ret;
3485
3486         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3487                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3488         if (ret)
3489                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3490 }
3491
3492 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3493                                        struct iwl_mvm_vif *mvmvif,
3494                                        bool disable)
3495 {
3496         struct ieee80211_sta *sta;
3497         struct iwl_mvm_sta *mvm_sta;
3498         int i;
3499
3500         lockdep_assert_held(&mvm->mutex);
3501
3502         /* Block/unblock all the stations of the given mvmvif */
3503         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3504                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3505                                                 lockdep_is_held(&mvm->mutex));
3506                 if (IS_ERR_OR_NULL(sta))
3507                         continue;
3508
3509                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3510                 if (mvm_sta->mac_id_n_color !=
3511                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3512                         continue;
3513
3514                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3515         }
3516
3517         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3518                 return;
3519
3520         /* Need to block/unblock also multicast station */
3521         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3522                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3523                                                   &mvmvif->mcast_sta, disable);
3524
3525         /*
3526          * Only unblock the broadcast station (FW blocks it for immediate
3527          * quiet, not the driver)
3528          */
3529         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3530                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3531                                                   &mvmvif->bcast_sta, disable);
3532 }
3533
3534 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3535 {
3536         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3537         struct iwl_mvm_sta *mvmsta;
3538
3539         rcu_read_lock();
3540
3541         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3542
3543         if (!WARN_ON(!mvmsta))
3544                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3545
3546         rcu_read_unlock();
3547 }
3548
3549 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3550 {
3551         u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3552
3553         /*
3554          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
3555          * to align the wrap around of ssn so we compare relevant values.
3556          */
3557         if (mvm->trans->cfg->gen2)
3558                 sn &= 0xff;
3559
3560         return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3561 }