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

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
iwl_mvm_add_sta_cmd_size
iwl_mvm_find_free_sta_id
iwl_mvm_sta_send_to_fw
iwl_mvm_rx_agg_session_expired
iwl_mvm_invalidate_sta_queue
iwl_mvm_disable_txq
iwl_mvm_get_queue_agg_tids
iwl_mvm_remove_sta_queue_marking
iwl_mvm_free_inactive_queue
iwl_mvm_get_shared_queue
iwl_mvm_redirect_queue
iwl_mvm_find_free_queue
iwl_mvm_tvqm_enable_txq
iwl_mvm_sta_alloc_queue_tvqm
iwl_mvm_update_txq_mapping
iwl_mvm_enable_txq
iwl_mvm_change_queue_tid
iwl_mvm_unshare_queue
iwl_mvm_remove_inactive_tids
iwl_mvm_inactivity_check
iwl_mvm_sta_alloc_queue
iwl_mvm_tid_to_ac_queue
iwl_mvm_add_new_dqa_stream_wk
iwl_mvm_reserve_sta_stream
iwl_mvm_realloc_queues_after_restart
iwl_mvm_add_int_sta_common
iwl_mvm_add_sta
iwl_mvm_drain_sta
iwl_mvm_rm_sta_common
iwl_mvm_disable_sta_queues
iwl_mvm_wait_sta_queues_empty
iwl_mvm_rm_sta
iwl_mvm_rm_sta_id
iwl_mvm_allocate_int_sta
iwl_mvm_dealloc_int_sta
iwl_mvm_enable_aux_snif_queue
iwl_mvm_enable_aux_snif_queue_tvqm
iwl_mvm_add_int_sta_with_queue
iwl_mvm_add_aux_sta
iwl_mvm_add_snif_sta
iwl_mvm_rm_snif_sta
iwl_mvm_dealloc_snif_sta
iwl_mvm_del_aux_sta
iwl_mvm_send_add_bcast_sta
iwl_mvm_free_bcast_sta_queues
iwl_mvm_send_rm_bcast_sta
iwl_mvm_alloc_bcast_sta
iwl_mvm_add_p2p_bcast_sta
iwl_mvm_dealloc_bcast_sta
iwl_mvm_rm_p2p_bcast_sta
iwl_mvm_add_mcast_sta
__iwl_mvm_remove_sta_key
iwl_mvm_rm_mcast_sta
iwl_mvm_sync_rxq_del_ba
iwl_mvm_free_reorder
iwl_mvm_init_reorder_buffer
iwl_mvm_sta_rx_agg
iwl_mvm_sta_tx_agg
iwl_mvm_sta_tx_agg_start
iwl_mvm_sta_tx_agg_oper
iwl_mvm_unreserve_agg_queue
iwl_mvm_sta_tx_agg_stop
iwl_mvm_sta_tx_agg_flush
iwl_mvm_set_fw_key_idx
iwl_mvm_get_key_sta
iwl_mvm_send_sta_key
iwl_mvm_send_sta_igtk
iwl_mvm_get_mac_addr
__iwl_mvm_set_sta_key
iwl_mvm_set_sta_key
iwl_mvm_remove_sta_key
iwl_mvm_update_tkip_key
iwl_mvm_sta_modify_ps_wake
iwl_mvm_sta_modify_sleep_tx_count
iwl_mvm_rx_eosp_notif
iwl_mvm_sta_modify_disable_tx
iwl_mvm_sta_modify_disable_tx_ap
iwl_mvm_int_sta_modify_disable_tx
iwl_mvm_modify_all_sta_disable_tx
iwl_mvm_csa_client_absent
iwl_mvm_tid_queued
   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.
   5  *
   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  * Copyright(c) 2018 - 2019 Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
  24  *
  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  30  *
  31  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018 - 2019 Intel Corporation
  35  * All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  *
  41  *  * Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  *  * Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in
  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
  47  *  * Neither the name Intel Corporation nor the names of its
  48  *    contributors may be used to endorse or promote products derived
  49  *    from this software without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 #include <net/mac80211.h>
  65 
  66 #include "mvm.h"
  67 #include "sta.h"
  68 #include "rs.h"
  69 
  70 /*
  71  * New version of ADD_STA_sta command added new fields at the end of the
  72  * structure, so sending the size of the relevant API's structure is enough to
  73  * support both API versions.
  74  */
  75 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
  76 {
  77         if (iwl_mvm_has_new_rx_api(mvm) ||
  78             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
  79                 return sizeof(struct iwl_mvm_add_sta_cmd);
  80         else
  81                 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
  82 }
  83 
  84 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
  85                                     enum nl80211_iftype iftype)
  86 {
  87         int sta_id;
  88         u32 reserved_ids = 0;
  89 
  90         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
  91         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
  92 
  93         lockdep_assert_held(&mvm->mutex);
  94 
  95         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
  96         if (iftype != NL80211_IFTYPE_STATION)
  97                 reserved_ids = BIT(0);
  98 
  99         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
 100         for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
 101                 if (BIT(sta_id) & reserved_ids)
 102                         continue;
 103 
 104                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 105                                                lockdep_is_held(&mvm->mutex)))
 106                         return sta_id;
 107         }
 108         return IWL_MVM_INVALID_STA;
 109 }
 110 
 111 /* send station add/update command to firmware */
 112 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 113                            bool update, unsigned int flags)
 114 {
 115         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 116         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
 117                 .sta_id = mvm_sta->sta_id,
 118                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
 119                 .add_modify = update ? 1 : 0,
 120                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
 121                                                  STA_FLG_MIMO_EN_MSK |
 122                                                  STA_FLG_RTS_MIMO_PROT),
 123                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 124         };
 125         int ret;
 126         u32 status;
 127         u32 agg_size = 0, mpdu_dens = 0;
 128 
 129         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
 130                 add_sta_cmd.station_type = mvm_sta->sta_type;
 131 
 132         if (!update || (flags & STA_MODIFY_QUEUES)) {
 133                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 134 
 135                 if (!iwl_mvm_has_new_tx_api(mvm)) {
 136                         add_sta_cmd.tfd_queue_msk =
 137                                 cpu_to_le32(mvm_sta->tfd_queue_msk);
 138 
 139                         if (flags & STA_MODIFY_QUEUES)
 140                                 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
 141                 } else {
 142                         WARN_ON(flags & STA_MODIFY_QUEUES);
 143                 }
 144         }
 145 
 146         switch (sta->bandwidth) {
 147         case IEEE80211_STA_RX_BW_160:
 148                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 149                 /* fall through */
 150         case IEEE80211_STA_RX_BW_80:
 151                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 152                 /* fall through */
 153         case IEEE80211_STA_RX_BW_40:
 154                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 155                 /* fall through */
 156         case IEEE80211_STA_RX_BW_20:
 157                 if (sta->ht_cap.ht_supported)
 158                         add_sta_cmd.station_flags |=
 159                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 160                 break;
 161         }
 162 
 163         switch (sta->rx_nss) {
 164         case 1:
 165                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 166                 break;
 167         case 2:
 168                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 169                 break;
 170         case 3 ... 8:
 171                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 172                 break;
 173         }
 174 
 175         switch (sta->smps_mode) {
 176         case IEEE80211_SMPS_AUTOMATIC:
 177         case IEEE80211_SMPS_NUM_MODES:
 178                 WARN_ON(1);
 179                 break;
 180         case IEEE80211_SMPS_STATIC:
 181                 /* override NSS */
 182                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 183                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 184                 break;
 185         case IEEE80211_SMPS_DYNAMIC:
 186                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 187                 break;
 188         case IEEE80211_SMPS_OFF:
 189                 /* nothing */
 190                 break;
 191         }
 192 
 193         if (sta->ht_cap.ht_supported) {
 194                 add_sta_cmd.station_flags_msk |=
 195                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 196                                     STA_FLG_AGG_MPDU_DENS_MSK);
 197 
 198                 mpdu_dens = sta->ht_cap.ampdu_density;
 199         }
 200 
 201         if (sta->vht_cap.vht_supported) {
 202                 agg_size = sta->vht_cap.cap &
 203                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 204                 agg_size >>=
 205                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 206         } else if (sta->ht_cap.ht_supported) {
 207                 agg_size = sta->ht_cap.ampdu_factor;
 208         }
 209 
 210         add_sta_cmd.station_flags |=
 211                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 212         add_sta_cmd.station_flags |=
 213                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 214         if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
 215                 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
 216 
 217         if (sta->wme) {
 218                 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
 219 
 220                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
 221                         add_sta_cmd.uapsd_acs |= BIT(AC_BK);
 222                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
 223                         add_sta_cmd.uapsd_acs |= BIT(AC_BE);
 224                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
 225                         add_sta_cmd.uapsd_acs |= BIT(AC_VI);
 226                 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
 227                         add_sta_cmd.uapsd_acs |= BIT(AC_VO);
 228                 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
 229                 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
 230         }
 231 
 232         status = ADD_STA_SUCCESS;
 233         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 234                                           iwl_mvm_add_sta_cmd_size(mvm),
 235                                           &add_sta_cmd, &status);
 236         if (ret)
 237                 return ret;
 238 
 239         switch (status & IWL_ADD_STA_STATUS_MASK) {
 240         case ADD_STA_SUCCESS:
 241                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 242                 break;
 243         default:
 244                 ret = -EIO;
 245                 IWL_ERR(mvm, "ADD_STA failed\n");
 246                 break;
 247         }
 248 
 249         return ret;
 250 }
 251 
 252 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
 253 {
 254         struct iwl_mvm_baid_data *data =
 255                 from_timer(data, t, session_timer);
 256         struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
 257         struct iwl_mvm_baid_data *ba_data;
 258         struct ieee80211_sta *sta;
 259         struct iwl_mvm_sta *mvm_sta;
 260         unsigned long timeout;
 261 
 262         rcu_read_lock();
 263 
 264         ba_data = rcu_dereference(*rcu_ptr);
 265 
 266         if (WARN_ON(!ba_data))
 267                 goto unlock;
 268 
 269         if (!ba_data->timeout)
 270                 goto unlock;
 271 
 272         timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
 273         if (time_is_after_jiffies(timeout)) {
 274                 mod_timer(&ba_data->session_timer, timeout);
 275                 goto unlock;
 276         }
 277 
 278         /* Timer expired */
 279         sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
 280 
 281         /*
 282          * sta should be valid unless the following happens:
 283          * The firmware asserts which triggers a reconfig flow, but
 284          * the reconfig fails before we set the pointer to sta into
 285          * the fw_id_to_mac_id pointer table. Mac80211 can't stop
 286          * A-MDPU and hence the timer continues to run. Then, the
 287          * timer expires and sta is NULL.
 288          */
 289         if (!sta)
 290                 goto unlock;
 291 
 292         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 293         ieee80211_rx_ba_timer_expired(mvm_sta->vif,
 294                                       sta->addr, ba_data->tid);
 295 unlock:
 296         rcu_read_unlock();
 297 }
 298 
 299 /* Disable aggregations for a bitmap of TIDs for a given station */
 300 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
 301                                         unsigned long disable_agg_tids,
 302                                         bool remove_queue)
 303 {
 304         struct iwl_mvm_add_sta_cmd cmd = {};
 305         struct ieee80211_sta *sta;
 306         struct iwl_mvm_sta *mvmsta;
 307         u32 status;
 308         u8 sta_id;
 309 
 310         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 311                 return -EINVAL;
 312 
 313         sta_id = mvm->queue_info[queue].ra_sta_id;
 314 
 315         rcu_read_lock();
 316 
 317         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 318 
 319         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 320                 rcu_read_unlock();
 321                 return -EINVAL;
 322         }
 323 
 324         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 325 
 326         mvmsta->tid_disable_agg |= disable_agg_tids;
 327 
 328         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 329         cmd.sta_id = mvmsta->sta_id;
 330         cmd.add_modify = STA_MODE_MODIFY;
 331         cmd.modify_mask = STA_MODIFY_QUEUES;
 332         if (disable_agg_tids)
 333                 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
 334         if (remove_queue)
 335                 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
 336         cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 337         cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 338 
 339         rcu_read_unlock();
 340 
 341         /* Notify FW of queue removal from the STA queues */
 342         status = ADD_STA_SUCCESS;
 343         return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 344                                            iwl_mvm_add_sta_cmd_size(mvm),
 345                                            &cmd, &status);
 346 }
 347 
 348 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 349                                int queue, u8 tid, u8 flags)
 350 {
 351         struct iwl_scd_txq_cfg_cmd cmd = {
 352                 .scd_queue = queue,
 353                 .action = SCD_CFG_DISABLE_QUEUE,
 354         };
 355         int ret;
 356 
 357         if (iwl_mvm_has_new_tx_api(mvm)) {
 358                 iwl_trans_txq_free(mvm->trans, queue);
 359 
 360                 return 0;
 361         }
 362 
 363         if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
 364                 return 0;
 365 
 366         mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
 367 
 368         cmd.action = mvm->queue_info[queue].tid_bitmap ?
 369                 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
 370         if (cmd.action == SCD_CFG_DISABLE_QUEUE)
 371                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
 372 
 373         IWL_DEBUG_TX_QUEUES(mvm,
 374                             "Disabling TXQ #%d tids=0x%x\n",
 375                             queue,
 376                             mvm->queue_info[queue].tid_bitmap);
 377 
 378         /* If the queue is still enabled - nothing left to do in this func */
 379         if (cmd.action == SCD_CFG_ENABLE_QUEUE)
 380                 return 0;
 381 
 382         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 383         cmd.tid = mvm->queue_info[queue].txq_tid;
 384 
 385         /* Make sure queue info is correct even though we overwrite it */
 386         WARN(mvm->queue_info[queue].tid_bitmap,
 387              "TXQ #%d info out-of-sync - tids=0x%x\n",
 388              queue, mvm->queue_info[queue].tid_bitmap);
 389 
 390         /* If we are here - the queue is freed and we can zero out these vals */
 391         mvm->queue_info[queue].tid_bitmap = 0;
 392 
 393         if (sta) {
 394                 struct iwl_mvm_txq *mvmtxq =
 395                         iwl_mvm_txq_from_tid(sta, tid);
 396 
 397                 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
 398         }
 399 
 400         /* Regardless if this is a reserved TXQ for a STA - mark it as false */
 401         mvm->queue_info[queue].reserved = false;
 402 
 403         iwl_trans_txq_disable(mvm->trans, queue, false);
 404         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
 405                                    sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
 406 
 407         if (ret)
 408                 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
 409                         queue, ret);
 410         return ret;
 411 }
 412 
 413 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
 414 {
 415         struct ieee80211_sta *sta;
 416         struct iwl_mvm_sta *mvmsta;
 417         unsigned long tid_bitmap;
 418         unsigned long agg_tids = 0;
 419         u8 sta_id;
 420         int tid;
 421 
 422         lockdep_assert_held(&mvm->mutex);
 423 
 424         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 425                 return -EINVAL;
 426 
 427         sta_id = mvm->queue_info[queue].ra_sta_id;
 428         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 429 
 430         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 431                                         lockdep_is_held(&mvm->mutex));
 432 
 433         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 434                 return -EINVAL;
 435 
 436         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 437 
 438         spin_lock_bh(&mvmsta->lock);
 439         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 440                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 441                         agg_tids |= BIT(tid);
 442         }
 443         spin_unlock_bh(&mvmsta->lock);
 444 
 445         return agg_tids;
 446 }
 447 
 448 /*
 449  * Remove a queue from a station's resources.
 450  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 451  * doesn't disable the queue
 452  */
 453 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
 454 {
 455         struct ieee80211_sta *sta;
 456         struct iwl_mvm_sta *mvmsta;
 457         unsigned long tid_bitmap;
 458         unsigned long disable_agg_tids = 0;
 459         u8 sta_id;
 460         int tid;
 461 
 462         lockdep_assert_held(&mvm->mutex);
 463 
 464         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 465                 return -EINVAL;
 466 
 467         sta_id = mvm->queue_info[queue].ra_sta_id;
 468         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 469 
 470         rcu_read_lock();
 471 
 472         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 473 
 474         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
 475                 rcu_read_unlock();
 476                 return 0;
 477         }
 478 
 479         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 480 
 481         spin_lock_bh(&mvmsta->lock);
 482         /* Unmap MAC queues and TIDs from this queue */
 483         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
 484                 struct iwl_mvm_txq *mvmtxq =
 485                         iwl_mvm_txq_from_tid(sta, tid);
 486 
 487                 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
 488                         disable_agg_tids |= BIT(tid);
 489                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
 490 
 491                 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
 492         }
 493 
 494         mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
 495         spin_unlock_bh(&mvmsta->lock);
 496 
 497         rcu_read_unlock();
 498 
 499         /*
 500          * The TX path may have been using this TXQ_ID from the tid_data,
 501          * so make sure it's no longer running so that we can safely reuse
 502          * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
 503          * above, but nothing guarantees we've stopped using them. Thus,
 504          * without this, we could get to iwl_mvm_disable_txq() and remove
 505          * the queue while still sending frames to it.
 506          */
 507         synchronize_net();
 508 
 509         return disable_agg_tids;
 510 }
 511 
 512 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
 513                                        struct ieee80211_sta *old_sta,
 514                                        u8 new_sta_id)
 515 {
 516         struct iwl_mvm_sta *mvmsta;
 517         u8 sta_id, tid;
 518         unsigned long disable_agg_tids = 0;
 519         bool same_sta;
 520         int ret;
 521 
 522         lockdep_assert_held(&mvm->mutex);
 523 
 524         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 525                 return -EINVAL;
 526 
 527         sta_id = mvm->queue_info[queue].ra_sta_id;
 528         tid = mvm->queue_info[queue].txq_tid;
 529 
 530         same_sta = sta_id == new_sta_id;
 531 
 532         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 533         if (WARN_ON(!mvmsta))
 534                 return -EINVAL;
 535 
 536         disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
 537         /* Disable the queue */
 538         if (disable_agg_tids)
 539                 iwl_mvm_invalidate_sta_queue(mvm, queue,
 540                                              disable_agg_tids, false);
 541 
 542         ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0);
 543         if (ret) {
 544                 IWL_ERR(mvm,
 545                         "Failed to free inactive queue %d (ret=%d)\n",
 546                         queue, ret);
 547 
 548                 return ret;
 549         }
 550 
 551         /* If TXQ is allocated to another STA, update removal in FW */
 552         if (!same_sta)
 553                 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
 554 
 555         return 0;
 556 }
 557 
 558 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
 559                                     unsigned long tfd_queue_mask, u8 ac)
 560 {
 561         int queue = 0;
 562         u8 ac_to_queue[IEEE80211_NUM_ACS];
 563         int i;
 564 
 565         /*
 566          * This protects us against grabbing a queue that's being reconfigured
 567          * by the inactivity checker.
 568          */
 569         lockdep_assert_held(&mvm->mutex);
 570 
 571         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 572                 return -EINVAL;
 573 
 574         memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
 575 
 576         /* See what ACs the existing queues for this STA have */
 577         for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
 578                 /* Only DATA queues can be shared */
 579                 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
 580                     i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
 581                         continue;
 582 
 583                 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
 584         }
 585 
 586         /*
 587          * The queue to share is chosen only from DATA queues as follows (in
 588          * descending priority):
 589          * 1. An AC_BE queue
 590          * 2. Same AC queue
 591          * 3. Highest AC queue that is lower than new AC
 592          * 4. Any existing AC (there always is at least 1 DATA queue)
 593          */
 594 
 595         /* Priority 1: An AC_BE queue */
 596         if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
 597                 queue = ac_to_queue[IEEE80211_AC_BE];
 598         /* Priority 2: Same AC queue */
 599         else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 600                 queue = ac_to_queue[ac];
 601         /* Priority 3a: If new AC is VO and VI exists - use VI */
 602         else if (ac == IEEE80211_AC_VO &&
 603                  ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 604                 queue = ac_to_queue[IEEE80211_AC_VI];
 605         /* Priority 3b: No BE so only AC less than the new one is BK */
 606         else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
 607                 queue = ac_to_queue[IEEE80211_AC_BK];
 608         /* Priority 4a: No BE nor BK - use VI if exists */
 609         else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
 610                 queue = ac_to_queue[IEEE80211_AC_VI];
 611         /* Priority 4b: No BE, BK nor VI - use VO if exists */
 612         else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
 613                 queue = ac_to_queue[IEEE80211_AC_VO];
 614 
 615         /* Make sure queue found (or not) is legal */
 616         if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
 617             !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
 618             (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
 619                 IWL_ERR(mvm, "No DATA queues available to share\n");
 620                 return -ENOSPC;
 621         }
 622 
 623         return queue;
 624 }
 625 
 626 /*
 627  * If a given queue has a higher AC than the TID stream that is being compared
 628  * to, the queue needs to be redirected to the lower AC. This function does that
 629  * in such a case, otherwise - if no redirection required - it does nothing,
 630  * unless the %force param is true.
 631  */
 632 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
 633                                   int ac, int ssn, unsigned int wdg_timeout,
 634                                   bool force, struct iwl_mvm_txq *txq)
 635 {
 636         struct iwl_scd_txq_cfg_cmd cmd = {
 637                 .scd_queue = queue,
 638                 .action = SCD_CFG_DISABLE_QUEUE,
 639         };
 640         bool shared_queue;
 641         int ret;
 642 
 643         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 644                 return -EINVAL;
 645 
 646         /*
 647          * If the AC is lower than current one - FIFO needs to be redirected to
 648          * the lowest one of the streams in the queue. Check if this is needed
 649          * here.
 650          * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
 651          * value 3 and VO with value 0, so to check if ac X is lower than ac Y
 652          * we need to check if the numerical value of X is LARGER than of Y.
 653          */
 654         if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
 655                 IWL_DEBUG_TX_QUEUES(mvm,
 656                                     "No redirection needed on TXQ #%d\n",
 657                                     queue);
 658                 return 0;
 659         }
 660 
 661         cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
 662         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
 663         cmd.tid = mvm->queue_info[queue].txq_tid;
 664         shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
 665 
 666         IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
 667                             queue, iwl_mvm_ac_to_tx_fifo[ac]);
 668 
 669         /* Stop the queue and wait for it to empty */
 670         txq->stopped = true;
 671 
 672         ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
 673         if (ret) {
 674                 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
 675                         queue);
 676                 ret = -EIO;
 677                 goto out;
 678         }
 679 
 680         /* Before redirecting the queue we need to de-activate it */
 681         iwl_trans_txq_disable(mvm->trans, queue, false);
 682         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 683         if (ret)
 684                 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
 685                         ret);
 686 
 687         /* Make sure the SCD wrptr is correctly set before reconfiguring */
 688         iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
 689 
 690         /* Update the TID "owner" of the queue */
 691         mvm->queue_info[queue].txq_tid = tid;
 692 
 693         /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
 694 
 695         /* Redirect to lower AC */
 696         iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
 697                              cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
 698 
 699         /* Update AC marking of the queue */
 700         mvm->queue_info[queue].mac80211_ac = ac;
 701 
 702         /*
 703          * Mark queue as shared in transport if shared
 704          * Note this has to be done after queue enablement because enablement
 705          * can also set this value, and there is no indication there to shared
 706          * queues
 707          */
 708         if (shared_queue)
 709                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
 710 
 711 out:
 712         /* Continue using the queue */
 713         txq->stopped = false;
 714 
 715         return ret;
 716 }
 717 
 718 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
 719                                    u8 minq, u8 maxq)
 720 {
 721         int i;
 722 
 723         lockdep_assert_held(&mvm->mutex);
 724 
 725         if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues,
 726                  "max queue %d >= num_of_queues (%d)", maxq,
 727                  mvm->trans->trans_cfg->base_params->num_of_queues))
 728                 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1;
 729 
 730         /* This should not be hit with new TX path */
 731         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 732                 return -ENOSPC;
 733 
 734         /* Start by looking for a free queue */
 735         for (i = minq; i <= maxq; i++)
 736                 if (mvm->queue_info[i].tid_bitmap == 0 &&
 737                     mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
 738                         return i;
 739 
 740         return -ENOSPC;
 741 }
 742 
 743 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
 744                                    u8 sta_id, u8 tid, unsigned int timeout)
 745 {
 746         int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE,
 747                                 mvm->trans->cfg->min_256_ba_txq_size);
 748 
 749         if (tid == IWL_MAX_TID_COUNT) {
 750                 tid = IWL_MGMT_TID;
 751                 size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
 752                              mvm->trans->cfg->min_txq_size);
 753         }
 754         queue = iwl_trans_txq_alloc(mvm->trans,
 755                                     cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE),
 756                                     sta_id, tid, SCD_QUEUE_CFG, size, timeout);
 757 
 758         if (queue < 0) {
 759                 IWL_DEBUG_TX_QUEUES(mvm,
 760                                     "Failed allocating TXQ for sta %d tid %d, ret: %d\n",
 761                                     sta_id, tid, queue);
 762                 return queue;
 763         }
 764 
 765         IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
 766                             queue, sta_id, tid);
 767 
 768         IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue);
 769 
 770         return queue;
 771 }
 772 
 773 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
 774                                         struct ieee80211_sta *sta, u8 ac,
 775                                         int tid)
 776 {
 777         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 778         struct iwl_mvm_txq *mvmtxq =
 779                 iwl_mvm_txq_from_tid(sta, tid);
 780         unsigned int wdg_timeout =
 781                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 782         int queue = -1;
 783 
 784         lockdep_assert_held(&mvm->mutex);
 785 
 786         IWL_DEBUG_TX_QUEUES(mvm,
 787                             "Allocating queue for sta %d on tid %d\n",
 788                             mvmsta->sta_id, tid);
 789         queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout);
 790         if (queue < 0)
 791                 return queue;
 792 
 793         mvmtxq->txq_id = queue;
 794         mvm->tvqm_info[queue].txq_tid = tid;
 795         mvm->tvqm_info[queue].sta_id = mvmsta->sta_id;
 796 
 797         IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
 798 
 799         spin_lock_bh(&mvmsta->lock);
 800         mvmsta->tid_data[tid].txq_id = queue;
 801         spin_unlock_bh(&mvmsta->lock);
 802 
 803         return 0;
 804 }
 805 
 806 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
 807                                        struct ieee80211_sta *sta,
 808                                        int queue, u8 sta_id, u8 tid)
 809 {
 810         bool enable_queue = true;
 811 
 812         /* Make sure this TID isn't already enabled */
 813         if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
 814                 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
 815                         queue, tid);
 816                 return false;
 817         }
 818 
 819         /* Update mappings and refcounts */
 820         if (mvm->queue_info[queue].tid_bitmap)
 821                 enable_queue = false;
 822 
 823         mvm->queue_info[queue].tid_bitmap |= BIT(tid);
 824         mvm->queue_info[queue].ra_sta_id = sta_id;
 825 
 826         if (enable_queue) {
 827                 if (tid != IWL_MAX_TID_COUNT)
 828                         mvm->queue_info[queue].mac80211_ac =
 829                                 tid_to_mac80211_ac[tid];
 830                 else
 831                         mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
 832 
 833                 mvm->queue_info[queue].txq_tid = tid;
 834         }
 835 
 836         if (sta) {
 837                 struct iwl_mvm_txq *mvmtxq =
 838                         iwl_mvm_txq_from_tid(sta, tid);
 839 
 840                 mvmtxq->txq_id = queue;
 841         }
 842 
 843         IWL_DEBUG_TX_QUEUES(mvm,
 844                             "Enabling TXQ #%d tids=0x%x\n",
 845                             queue, mvm->queue_info[queue].tid_bitmap);
 846 
 847         return enable_queue;
 848 }
 849 
 850 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 851                                int queue, u16 ssn,
 852                                const struct iwl_trans_txq_scd_cfg *cfg,
 853                                unsigned int wdg_timeout)
 854 {
 855         struct iwl_scd_txq_cfg_cmd cmd = {
 856                 .scd_queue = queue,
 857                 .action = SCD_CFG_ENABLE_QUEUE,
 858                 .window = cfg->frame_limit,
 859                 .sta_id = cfg->sta_id,
 860                 .ssn = cpu_to_le16(ssn),
 861                 .tx_fifo = cfg->fifo,
 862                 .aggregate = cfg->aggregate,
 863                 .tid = cfg->tid,
 864         };
 865         bool inc_ssn;
 866 
 867         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 868                 return false;
 869 
 870         /* Send the enabling command if we need to */
 871         if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
 872                 return false;
 873 
 874         inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
 875                                            NULL, wdg_timeout);
 876         if (inc_ssn)
 877                 le16_add_cpu(&cmd.ssn, 1);
 878 
 879         WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
 880              "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
 881 
 882         return inc_ssn;
 883 }
 884 
 885 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
 886 {
 887         struct iwl_scd_txq_cfg_cmd cmd = {
 888                 .scd_queue = queue,
 889                 .action = SCD_CFG_UPDATE_QUEUE_TID,
 890         };
 891         int tid;
 892         unsigned long tid_bitmap;
 893         int ret;
 894 
 895         lockdep_assert_held(&mvm->mutex);
 896 
 897         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 898                 return;
 899 
 900         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 901 
 902         if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
 903                 return;
 904 
 905         /* Find any TID for queue */
 906         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 907         cmd.tid = tid;
 908         cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 909 
 910         ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
 911         if (ret) {
 912                 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
 913                         queue, ret);
 914                 return;
 915         }
 916 
 917         mvm->queue_info[queue].txq_tid = tid;
 918         IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
 919                             queue, tid);
 920 }
 921 
 922 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
 923 {
 924         struct ieee80211_sta *sta;
 925         struct iwl_mvm_sta *mvmsta;
 926         u8 sta_id;
 927         int tid = -1;
 928         unsigned long tid_bitmap;
 929         unsigned int wdg_timeout;
 930         int ssn;
 931         int ret = true;
 932 
 933         /* queue sharing is disabled on new TX path */
 934         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
 935                 return;
 936 
 937         lockdep_assert_held(&mvm->mutex);
 938 
 939         sta_id = mvm->queue_info[queue].ra_sta_id;
 940         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
 941 
 942         /* Find TID for queue, and make sure it is the only one on the queue */
 943         tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
 944         if (tid_bitmap != BIT(tid)) {
 945                 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
 946                         queue, tid_bitmap);
 947                 return;
 948         }
 949 
 950         IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
 951                             tid);
 952 
 953         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 954                                         lockdep_is_held(&mvm->mutex));
 955 
 956         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
 957                 return;
 958 
 959         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 960         wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
 961 
 962         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
 963 
 964         ret = iwl_mvm_redirect_queue(mvm, queue, tid,
 965                                      tid_to_mac80211_ac[tid], ssn,
 966                                      wdg_timeout, true,
 967                                      iwl_mvm_txq_from_tid(sta, tid));
 968         if (ret) {
 969                 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
 970                 return;
 971         }
 972 
 973         /* If aggs should be turned back on - do it */
 974         if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
 975                 struct iwl_mvm_add_sta_cmd cmd = {0};
 976 
 977                 mvmsta->tid_disable_agg &= ~BIT(tid);
 978 
 979                 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 980                 cmd.sta_id = mvmsta->sta_id;
 981                 cmd.add_modify = STA_MODE_MODIFY;
 982                 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
 983                 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
 984                 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
 985 
 986                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
 987                                            iwl_mvm_add_sta_cmd_size(mvm), &cmd);
 988                 if (!ret) {
 989                         IWL_DEBUG_TX_QUEUES(mvm,
 990                                             "TXQ #%d is now aggregated again\n",
 991                                             queue);
 992 
 993                         /* Mark queue intenally as aggregating again */
 994                         iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
 995                 }
 996         }
 997 
 998         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
 999 }
1000 
1001 /*
1002  * Remove inactive TIDs of a given queue.
1003  * If all queue TIDs are inactive - mark the queue as inactive
1004  * If only some the queue TIDs are inactive - unmap them from the queue
1005  *
1006  * Returns %true if all TIDs were removed and the queue could be reused.
1007  */
1008 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1009                                          struct iwl_mvm_sta *mvmsta, int queue,
1010                                          unsigned long tid_bitmap,
1011                                          unsigned long *unshare_queues,
1012                                          unsigned long *changetid_queues)
1013 {
1014         int tid;
1015 
1016         lockdep_assert_held(&mvmsta->lock);
1017         lockdep_assert_held(&mvm->mutex);
1018 
1019         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1020                 return false;
1021 
1022         /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1023         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1024                 /* If some TFDs are still queued - don't mark TID as inactive */
1025                 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1026                         tid_bitmap &= ~BIT(tid);
1027 
1028                 /* Don't mark as inactive any TID that has an active BA */
1029                 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1030                         tid_bitmap &= ~BIT(tid);
1031         }
1032 
1033         /* If all TIDs in the queue are inactive - return it can be reused */
1034         if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1035                 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1036                 return true;
1037         }
1038 
1039         /*
1040          * If we are here, this is a shared queue and not all TIDs timed-out.
1041          * Remove the ones that did.
1042          */
1043         for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1044                 u16 tid_bitmap;
1045 
1046                 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1047                 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1048 
1049                 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1050 
1051                 /*
1052                  * We need to take into account a situation in which a TXQ was
1053                  * allocated to TID x, and then turned shared by adding TIDs y
1054                  * and z. If TID x becomes inactive and is removed from the TXQ,
1055                  * ownership must be given to one of the remaining TIDs.
1056                  * This is mainly because if TID x continues - a new queue can't
1057                  * be allocated for it as long as it is an owner of another TXQ.
1058                  *
1059                  * Mark this queue in the right bitmap, we'll send the command
1060                  * to the firmware later.
1061                  */
1062                 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1063                         set_bit(queue, changetid_queues);
1064 
1065                 IWL_DEBUG_TX_QUEUES(mvm,
1066                                     "Removing inactive TID %d from shared Q:%d\n",
1067                                     tid, queue);
1068         }
1069 
1070         IWL_DEBUG_TX_QUEUES(mvm,
1071                             "TXQ #%d left with tid bitmap 0x%x\n", queue,
1072                             mvm->queue_info[queue].tid_bitmap);
1073 
1074         /*
1075          * There may be different TIDs with the same mac queues, so make
1076          * sure all TIDs have existing corresponding mac queues enabled
1077          */
1078         tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1079 
1080         /* If the queue is marked as shared - "unshare" it */
1081         if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1082             mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1083                 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1084                                     queue);
1085                 set_bit(queue, unshare_queues);
1086         }
1087 
1088         return false;
1089 }
1090 
1091 /*
1092  * Check for inactivity - this includes checking if any queue
1093  * can be unshared and finding one (and only one) that can be
1094  * reused.
1095  * This function is also invoked as a sort of clean-up task,
1096  * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1097  *
1098  * Returns the queue number, or -ENOSPC.
1099  */
1100 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1101 {
1102         unsigned long now = jiffies;
1103         unsigned long unshare_queues = 0;
1104         unsigned long changetid_queues = 0;
1105         int i, ret, free_queue = -ENOSPC;
1106         struct ieee80211_sta *queue_owner  = NULL;
1107 
1108         lockdep_assert_held(&mvm->mutex);
1109 
1110         if (iwl_mvm_has_new_tx_api(mvm))
1111                 return -ENOSPC;
1112 
1113         rcu_read_lock();
1114 
1115         /* we skip the CMD queue below by starting at 1 */
1116         BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1117 
1118         for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1119                 struct ieee80211_sta *sta;
1120                 struct iwl_mvm_sta *mvmsta;
1121                 u8 sta_id;
1122                 int tid;
1123                 unsigned long inactive_tid_bitmap = 0;
1124                 unsigned long queue_tid_bitmap;
1125 
1126                 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1127                 if (!queue_tid_bitmap)
1128                         continue;
1129 
1130                 /* If TXQ isn't in active use anyway - nothing to do here... */
1131                 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1132                     mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1133                         continue;
1134 
1135                 /* Check to see if there are inactive TIDs on this queue */
1136                 for_each_set_bit(tid, &queue_tid_bitmap,
1137                                  IWL_MAX_TID_COUNT + 1) {
1138                         if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1139                                        IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1140                                 continue;
1141 
1142                         inactive_tid_bitmap |= BIT(tid);
1143                 }
1144 
1145                 /* If all TIDs are active - finish check on this queue */
1146                 if (!inactive_tid_bitmap)
1147                         continue;
1148 
1149                 /*
1150                  * If we are here - the queue hadn't been served recently and is
1151                  * in use
1152                  */
1153 
1154                 sta_id = mvm->queue_info[i].ra_sta_id;
1155                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1156 
1157                 /*
1158                  * If the STA doesn't exist anymore, it isn't an error. It could
1159                  * be that it was removed since getting the queues, and in this
1160                  * case it should've inactivated its queues anyway.
1161                  */
1162                 if (IS_ERR_OR_NULL(sta))
1163                         continue;
1164 
1165                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1166 
1167                 spin_lock_bh(&mvmsta->lock);
1168                 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1169                                                    inactive_tid_bitmap,
1170                                                    &unshare_queues,
1171                                                    &changetid_queues);
1172                 if (ret && free_queue < 0) {
1173                         queue_owner = sta;
1174                         free_queue = i;
1175                 }
1176                 /* only unlock sta lock - we still need the queue info lock */
1177                 spin_unlock_bh(&mvmsta->lock);
1178         }
1179 
1180 
1181         /* Reconfigure queues requiring reconfiguation */
1182         for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1183                 iwl_mvm_unshare_queue(mvm, i);
1184         for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1185                 iwl_mvm_change_queue_tid(mvm, i);
1186 
1187         if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1188                 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1189                                                   alloc_for_sta);
1190                 if (ret) {
1191                         rcu_read_unlock();
1192                         return ret;
1193                 }
1194         }
1195 
1196         rcu_read_unlock();
1197 
1198         return free_queue;
1199 }
1200 
1201 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1202                                    struct ieee80211_sta *sta, u8 ac, int tid)
1203 {
1204         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1205         struct iwl_trans_txq_scd_cfg cfg = {
1206                 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1207                 .sta_id = mvmsta->sta_id,
1208                 .tid = tid,
1209                 .frame_limit = IWL_FRAME_LIMIT,
1210         };
1211         unsigned int wdg_timeout =
1212                 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1213         int queue = -1;
1214         unsigned long disable_agg_tids = 0;
1215         enum iwl_mvm_agg_state queue_state;
1216         bool shared_queue = false, inc_ssn;
1217         int ssn;
1218         unsigned long tfd_queue_mask;
1219         int ret;
1220 
1221         lockdep_assert_held(&mvm->mutex);
1222 
1223         if (iwl_mvm_has_new_tx_api(mvm))
1224                 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1225 
1226         spin_lock_bh(&mvmsta->lock);
1227         tfd_queue_mask = mvmsta->tfd_queue_msk;
1228         ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1229         spin_unlock_bh(&mvmsta->lock);
1230 
1231         if (tid == IWL_MAX_TID_COUNT) {
1232                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1233                                                 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1234                                                 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1235                 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1236                         IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1237                                             queue);
1238 
1239                 /* If no such queue is found, we'll use a DATA queue instead */
1240         }
1241 
1242         if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1243             (mvm->queue_info[mvmsta->reserved_queue].status ==
1244                         IWL_MVM_QUEUE_RESERVED)) {
1245                 queue = mvmsta->reserved_queue;
1246                 mvm->queue_info[queue].reserved = true;
1247                 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1248         }
1249 
1250         if (queue < 0)
1251                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1252                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1253                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1254         if (queue < 0) {
1255                 /* try harder - perhaps kill an inactive queue */
1256                 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1257         }
1258 
1259         /* No free queue - we'll have to share */
1260         if (queue <= 0) {
1261                 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1262                 if (queue > 0) {
1263                         shared_queue = true;
1264                         mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1265                 }
1266         }
1267 
1268         /*
1269          * Mark TXQ as ready, even though it hasn't been fully configured yet,
1270          * to make sure no one else takes it.
1271          * This will allow avoiding re-acquiring the lock at the end of the
1272          * configuration. On error we'll mark it back as free.
1273          */
1274         if (queue > 0 && !shared_queue)
1275                 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1276 
1277         /* This shouldn't happen - out of queues */
1278         if (WARN_ON(queue <= 0)) {
1279                 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1280                         tid, cfg.sta_id);
1281                 return queue;
1282         }
1283 
1284         /*
1285          * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1286          * but for configuring the SCD to send A-MPDUs we need to mark the queue
1287          * as aggregatable.
1288          * Mark all DATA queues as allowing to be aggregated at some point
1289          */
1290         cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1291                          queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1292 
1293         IWL_DEBUG_TX_QUEUES(mvm,
1294                             "Allocating %squeue #%d to sta %d on tid %d\n",
1295                             shared_queue ? "shared " : "", queue,
1296                             mvmsta->sta_id, tid);
1297 
1298         if (shared_queue) {
1299                 /* Disable any open aggs on this queue */
1300                 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1301 
1302                 if (disable_agg_tids) {
1303                         IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1304                                             queue);
1305                         iwl_mvm_invalidate_sta_queue(mvm, queue,
1306                                                      disable_agg_tids, false);
1307                 }
1308         }
1309 
1310         inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1311 
1312         /*
1313          * Mark queue as shared in transport if shared
1314          * Note this has to be done after queue enablement because enablement
1315          * can also set this value, and there is no indication there to shared
1316          * queues
1317          */
1318         if (shared_queue)
1319                 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1320 
1321         spin_lock_bh(&mvmsta->lock);
1322         /*
1323          * This looks racy, but it is not. We have only one packet for
1324          * this ra/tid in our Tx path since we stop the Qdisc when we
1325          * need to allocate a new TFD queue.
1326          */
1327         if (inc_ssn) {
1328                 mvmsta->tid_data[tid].seq_number += 0x10;
1329                 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1330         }
1331         mvmsta->tid_data[tid].txq_id = queue;
1332         mvmsta->tfd_queue_msk |= BIT(queue);
1333         queue_state = mvmsta->tid_data[tid].state;
1334 
1335         if (mvmsta->reserved_queue == queue)
1336                 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1337         spin_unlock_bh(&mvmsta->lock);
1338 
1339         if (!shared_queue) {
1340                 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1341                 if (ret)
1342                         goto out_err;
1343 
1344                 /* If we need to re-enable aggregations... */
1345                 if (queue_state == IWL_AGG_ON) {
1346                         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1347                         if (ret)
1348                                 goto out_err;
1349                 }
1350         } else {
1351                 /* Redirect queue, if needed */
1352                 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1353                                              wdg_timeout, false,
1354                                              iwl_mvm_txq_from_tid(sta, tid));
1355                 if (ret)
1356                         goto out_err;
1357         }
1358 
1359         return 0;
1360 
1361 out_err:
1362         iwl_mvm_disable_txq(mvm, sta, queue, tid, 0);
1363 
1364         return ret;
1365 }
1366 
1367 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1368 {
1369         if (tid == IWL_MAX_TID_COUNT)
1370                 return IEEE80211_AC_VO; /* MGMT */
1371 
1372         return tid_to_mac80211_ac[tid];
1373 }
1374 
1375 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1376 {
1377         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1378                                            add_stream_wk);
1379 
1380         mutex_lock(&mvm->mutex);
1381 
1382         iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1383 
1384         while (!list_empty(&mvm->add_stream_txqs)) {
1385                 struct iwl_mvm_txq *mvmtxq;
1386                 struct ieee80211_txq *txq;
1387                 u8 tid;
1388 
1389                 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1390                                           struct iwl_mvm_txq, list);
1391 
1392                 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1393                                    drv_priv);
1394                 tid = txq->tid;
1395                 if (tid == IEEE80211_NUM_TIDS)
1396                         tid = IWL_MAX_TID_COUNT;
1397 
1398                 iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid);
1399                 list_del_init(&mvmtxq->list);
1400                 local_bh_disable();
1401                 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1402                 local_bh_enable();
1403         }
1404 
1405         mutex_unlock(&mvm->mutex);
1406 }
1407 
1408 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1409                                       struct ieee80211_sta *sta,
1410                                       enum nl80211_iftype vif_type)
1411 {
1412         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1413         int queue;
1414 
1415         /* queue reserving is disabled on new TX path */
1416         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1417                 return 0;
1418 
1419         /* run the general cleanup/unsharing of queues */
1420         iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1421 
1422         /* Make sure we have free resources for this STA */
1423         if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1424             !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1425             (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1426              IWL_MVM_QUEUE_FREE))
1427                 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1428         else
1429                 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1430                                                 IWL_MVM_DQA_MIN_DATA_QUEUE,
1431                                                 IWL_MVM_DQA_MAX_DATA_QUEUE);
1432         if (queue < 0) {
1433                 /* try again - this time kick out a queue if needed */
1434                 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1435                 if (queue < 0) {
1436                         IWL_ERR(mvm, "No available queues for new station\n");
1437                         return -ENOSPC;
1438                 }
1439         }
1440         mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1441 
1442         mvmsta->reserved_queue = queue;
1443 
1444         IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1445                             queue, mvmsta->sta_id);
1446 
1447         return 0;
1448 }
1449 
1450 /*
1451  * In DQA mode, after a HW restart the queues should be allocated as before, in
1452  * order to avoid race conditions when there are shared queues. This function
1453  * does the re-mapping and queue allocation.
1454  *
1455  * Note that re-enabling aggregations isn't done in this function.
1456  */
1457 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1458                                                  struct ieee80211_sta *sta)
1459 {
1460         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1461         unsigned int wdg =
1462                 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1463         int i;
1464         struct iwl_trans_txq_scd_cfg cfg = {
1465                 .sta_id = mvm_sta->sta_id,
1466                 .frame_limit = IWL_FRAME_LIMIT,
1467         };
1468 
1469         /* Make sure reserved queue is still marked as such (if allocated) */
1470         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1471                 mvm->queue_info[mvm_sta->reserved_queue].status =
1472                         IWL_MVM_QUEUE_RESERVED;
1473 
1474         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1475                 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1476                 int txq_id = tid_data->txq_id;
1477                 int ac;
1478 
1479                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1480                         continue;
1481 
1482                 ac = tid_to_mac80211_ac[i];
1483 
1484                 if (iwl_mvm_has_new_tx_api(mvm)) {
1485                         IWL_DEBUG_TX_QUEUES(mvm,
1486                                             "Re-mapping sta %d tid %d\n",
1487                                             mvm_sta->sta_id, i);
1488                         txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id,
1489                                                          i, wdg);
1490                         /*
1491                          * on failures, just set it to IWL_MVM_INVALID_QUEUE
1492                          * to try again later, we have no other good way of
1493                          * failing here
1494                          */
1495                         if (txq_id < 0)
1496                                 txq_id = IWL_MVM_INVALID_QUEUE;
1497                         tid_data->txq_id = txq_id;
1498 
1499                         /*
1500                          * Since we don't set the seq number after reset, and HW
1501                          * sets it now, FW reset will cause the seq num to start
1502                          * at 0 again, so driver will need to update it
1503                          * internally as well, so it keeps in sync with real val
1504                          */
1505                         tid_data->seq_number = 0;
1506                 } else {
1507                         u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1508 
1509                         cfg.tid = i;
1510                         cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1511                         cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1512                                          txq_id ==
1513                                          IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1514 
1515                         IWL_DEBUG_TX_QUEUES(mvm,
1516                                             "Re-mapping sta %d tid %d to queue %d\n",
1517                                             mvm_sta->sta_id, i, txq_id);
1518 
1519                         iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1520                         mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1521                 }
1522         }
1523 }
1524 
1525 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1526                                       struct iwl_mvm_int_sta *sta,
1527                                       const u8 *addr,
1528                                       u16 mac_id, u16 color)
1529 {
1530         struct iwl_mvm_add_sta_cmd cmd;
1531         int ret;
1532         u32 status = ADD_STA_SUCCESS;
1533 
1534         lockdep_assert_held(&mvm->mutex);
1535 
1536         memset(&cmd, 0, sizeof(cmd));
1537         cmd.sta_id = sta->sta_id;
1538         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1539                                                              color));
1540         if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1541                 cmd.station_type = sta->type;
1542 
1543         if (!iwl_mvm_has_new_tx_api(mvm))
1544                 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1545         cmd.tid_disable_tx = cpu_to_le16(0xffff);
1546 
1547         if (addr)
1548                 memcpy(cmd.addr, addr, ETH_ALEN);
1549 
1550         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1551                                           iwl_mvm_add_sta_cmd_size(mvm),
1552                                           &cmd, &status);
1553         if (ret)
1554                 return ret;
1555 
1556         switch (status & IWL_ADD_STA_STATUS_MASK) {
1557         case ADD_STA_SUCCESS:
1558                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1559                 return 0;
1560         default:
1561                 ret = -EIO;
1562                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1563                         status);
1564                 break;
1565         }
1566         return ret;
1567 }
1568 
1569 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1570                     struct ieee80211_vif *vif,
1571                     struct ieee80211_sta *sta)
1572 {
1573         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1574         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1575         struct iwl_mvm_rxq_dup_data *dup_data;
1576         int i, ret, sta_id;
1577         bool sta_update = false;
1578         unsigned int sta_flags = 0;
1579 
1580         lockdep_assert_held(&mvm->mutex);
1581 
1582         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1583                 sta_id = iwl_mvm_find_free_sta_id(mvm,
1584                                                   ieee80211_vif_type_p2p(vif));
1585         else
1586                 sta_id = mvm_sta->sta_id;
1587 
1588         if (sta_id == IWL_MVM_INVALID_STA)
1589                 return -ENOSPC;
1590 
1591         spin_lock_init(&mvm_sta->lock);
1592 
1593         /* if this is a HW restart re-alloc existing queues */
1594         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1595                 struct iwl_mvm_int_sta tmp_sta = {
1596                         .sta_id = sta_id,
1597                         .type = mvm_sta->sta_type,
1598                 };
1599 
1600                 /*
1601                  * First add an empty station since allocating
1602                  * a queue requires a valid station
1603                  */
1604                 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1605                                                  mvmvif->id, mvmvif->color);
1606                 if (ret)
1607                         goto err;
1608 
1609                 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1610                 sta_update = true;
1611                 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1612                 goto update_fw;
1613         }
1614 
1615         mvm_sta->sta_id = sta_id;
1616         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1617                                                       mvmvif->color);
1618         mvm_sta->vif = vif;
1619         if (!mvm->trans->trans_cfg->gen2)
1620                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1621         else
1622                 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1623         mvm_sta->tx_protection = 0;
1624         mvm_sta->tt_tx_protection = false;
1625         mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1626 
1627         /* HW restart, don't assume the memory has been zeroed */
1628         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1629         mvm_sta->tfd_queue_msk = 0;
1630 
1631         /* for HW restart - reset everything but the sequence number */
1632         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1633                 u16 seq = mvm_sta->tid_data[i].seq_number;
1634                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1635                 mvm_sta->tid_data[i].seq_number = seq;
1636 
1637                 /*
1638                  * Mark all queues for this STA as unallocated and defer TX
1639                  * frames until the queue is allocated
1640                  */
1641                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1642         }
1643 
1644         for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1645                 struct iwl_mvm_txq *mvmtxq =
1646                         iwl_mvm_txq_from_mac80211(sta->txq[i]);
1647 
1648                 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1649                 INIT_LIST_HEAD(&mvmtxq->list);
1650                 atomic_set(&mvmtxq->tx_request, 0);
1651         }
1652 
1653         mvm_sta->agg_tids = 0;
1654 
1655         if (iwl_mvm_has_new_rx_api(mvm) &&
1656             !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1657                 int q;
1658 
1659                 dup_data = kcalloc(mvm->trans->num_rx_queues,
1660                                    sizeof(*dup_data), GFP_KERNEL);
1661                 if (!dup_data)
1662                         return -ENOMEM;
1663                 /*
1664                  * Initialize all the last_seq values to 0xffff which can never
1665                  * compare equal to the frame's seq_ctrl in the check in
1666                  * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1667                  * number and fragmented packets don't reach that function.
1668                  *
1669                  * This thus allows receiving a packet with seqno 0 and the
1670                  * retry bit set as the very first packet on a new TID.
1671                  */
1672                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1673                         memset(dup_data[q].last_seq, 0xff,
1674                                sizeof(dup_data[q].last_seq));
1675                 mvm_sta->dup_data = dup_data;
1676         }
1677 
1678         if (!iwl_mvm_has_new_tx_api(mvm)) {
1679                 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1680                                                  ieee80211_vif_type_p2p(vif));
1681                 if (ret)
1682                         goto err;
1683         }
1684 
1685         /*
1686          * if rs is registered with mac80211, then "add station" will be handled
1687          * via the corresponding ops, otherwise need to notify rate scaling here
1688          */
1689         if (iwl_mvm_has_tlc_offload(mvm))
1690                 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1691         else
1692                 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock);
1693 
1694         iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1695 
1696 update_fw:
1697         ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1698         if (ret)
1699                 goto err;
1700 
1701         if (vif->type == NL80211_IFTYPE_STATION) {
1702                 if (!sta->tdls) {
1703                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1704                         mvmvif->ap_sta_id = sta_id;
1705                 } else {
1706                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1707                 }
1708         }
1709 
1710         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1711 
1712         return 0;
1713 
1714 err:
1715         return ret;
1716 }
1717 
1718 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1719                       bool drain)
1720 {
1721         struct iwl_mvm_add_sta_cmd cmd = {};
1722         int ret;
1723         u32 status;
1724 
1725         lockdep_assert_held(&mvm->mutex);
1726 
1727         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1728         cmd.sta_id = mvmsta->sta_id;
1729         cmd.add_modify = STA_MODE_MODIFY;
1730         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1731         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1732 
1733         status = ADD_STA_SUCCESS;
1734         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1735                                           iwl_mvm_add_sta_cmd_size(mvm),
1736                                           &cmd, &status);
1737         if (ret)
1738                 return ret;
1739 
1740         switch (status & IWL_ADD_STA_STATUS_MASK) {
1741         case ADD_STA_SUCCESS:
1742                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1743                                mvmsta->sta_id);
1744                 break;
1745         default:
1746                 ret = -EIO;
1747                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1748                         mvmsta->sta_id);
1749                 break;
1750         }
1751 
1752         return ret;
1753 }
1754 
1755 /*
1756  * Remove a station from the FW table. Before sending the command to remove
1757  * the station validate that the station is indeed known to the driver (sanity
1758  * only).
1759  */
1760 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1761 {
1762         struct ieee80211_sta *sta;
1763         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1764                 .sta_id = sta_id,
1765         };
1766         int ret;
1767 
1768         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1769                                         lockdep_is_held(&mvm->mutex));
1770 
1771         /* Note: internal stations are marked as error values */
1772         if (!sta) {
1773                 IWL_ERR(mvm, "Invalid station id\n");
1774                 return -EINVAL;
1775         }
1776 
1777         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1778                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
1779         if (ret) {
1780                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1781                 return ret;
1782         }
1783 
1784         return 0;
1785 }
1786 
1787 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1788                                        struct ieee80211_vif *vif,
1789                                        struct ieee80211_sta *sta)
1790 {
1791         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1792         int i;
1793 
1794         lockdep_assert_held(&mvm->mutex);
1795 
1796         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1797                 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1798                         continue;
1799 
1800                 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i,
1801                                     0);
1802                 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1803         }
1804 
1805         for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1806                 struct iwl_mvm_txq *mvmtxq =
1807                         iwl_mvm_txq_from_mac80211(sta->txq[i]);
1808 
1809                 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1810         }
1811 }
1812 
1813 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1814                                   struct iwl_mvm_sta *mvm_sta)
1815 {
1816         int i;
1817 
1818         for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1819                 u16 txq_id;
1820                 int ret;
1821 
1822                 spin_lock_bh(&mvm_sta->lock);
1823                 txq_id = mvm_sta->tid_data[i].txq_id;
1824                 spin_unlock_bh(&mvm_sta->lock);
1825 
1826                 if (txq_id == IWL_MVM_INVALID_QUEUE)
1827                         continue;
1828 
1829                 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1830                 if (ret)
1831                         return ret;
1832         }
1833 
1834         return 0;
1835 }
1836 
1837 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1838                    struct ieee80211_vif *vif,
1839                    struct ieee80211_sta *sta)
1840 {
1841         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1842         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1843         u8 sta_id = mvm_sta->sta_id;
1844         int ret;
1845 
1846         lockdep_assert_held(&mvm->mutex);
1847 
1848         if (iwl_mvm_has_new_rx_api(mvm))
1849                 kfree(mvm_sta->dup_data);
1850 
1851         ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1852         if (ret)
1853                 return ret;
1854 
1855         /* flush its queues here since we are freeing mvm_sta */
1856         ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1857         if (ret)
1858                 return ret;
1859         if (iwl_mvm_has_new_tx_api(mvm)) {
1860                 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1861         } else {
1862                 u32 q_mask = mvm_sta->tfd_queue_msk;
1863 
1864                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1865                                                      q_mask);
1866         }
1867         if (ret)
1868                 return ret;
1869 
1870         ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1871 
1872         iwl_mvm_disable_sta_queues(mvm, vif, sta);
1873 
1874         /* If there is a TXQ still marked as reserved - free it */
1875         if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1876                 u8 reserved_txq = mvm_sta->reserved_queue;
1877                 enum iwl_mvm_queue_status *status;
1878 
1879                 /*
1880                  * If no traffic has gone through the reserved TXQ - it
1881                  * is still marked as IWL_MVM_QUEUE_RESERVED, and
1882                  * should be manually marked as free again
1883                  */
1884                 status = &mvm->queue_info[reserved_txq].status;
1885                 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1886                          (*status != IWL_MVM_QUEUE_FREE),
1887                          "sta_id %d reserved txq %d status %d",
1888                          sta_id, reserved_txq, *status))
1889                         return -EINVAL;
1890 
1891                 *status = IWL_MVM_QUEUE_FREE;
1892         }
1893 
1894         if (vif->type == NL80211_IFTYPE_STATION &&
1895             mvmvif->ap_sta_id == sta_id) {
1896                 /* if associated - we can't remove the AP STA now */
1897                 if (vif->bss_conf.assoc)
1898                         return ret;
1899 
1900                 /* unassoc - go ahead - remove the AP STA now */
1901                 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1902         }
1903 
1904         /*
1905          * This shouldn't happen - the TDLS channel switch should be canceled
1906          * before the STA is removed.
1907          */
1908         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1909                 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1910                 cancel_delayed_work(&mvm->tdls_cs.dwork);
1911         }
1912 
1913         /*
1914          * Make sure that the tx response code sees the station as -EBUSY and
1915          * calls the drain worker.
1916          */
1917         spin_lock_bh(&mvm_sta->lock);
1918         spin_unlock_bh(&mvm_sta->lock);
1919 
1920         ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1921         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1922 
1923         return ret;
1924 }
1925 
1926 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1927                       struct ieee80211_vif *vif,
1928                       u8 sta_id)
1929 {
1930         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1931 
1932         lockdep_assert_held(&mvm->mutex);
1933 
1934         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1935         return ret;
1936 }
1937 
1938 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1939                              struct iwl_mvm_int_sta *sta,
1940                              u32 qmask, enum nl80211_iftype iftype,
1941                              enum iwl_sta_type type)
1942 {
1943         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1944             sta->sta_id == IWL_MVM_INVALID_STA) {
1945                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1946                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1947                         return -ENOSPC;
1948         }
1949 
1950         sta->tfd_queue_msk = qmask;
1951         sta->type = type;
1952 
1953         /* put a non-NULL value so iterating over the stations won't stop */
1954         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1955         return 0;
1956 }
1957 
1958 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1959 {
1960         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1961         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1962         sta->sta_id = IWL_MVM_INVALID_STA;
1963 }
1964 
1965 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
1966                                           u8 sta_id, u8 fifo)
1967 {
1968         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1969                 mvm->trans->trans_cfg->base_params->wd_timeout :
1970                 IWL_WATCHDOG_DISABLED;
1971         struct iwl_trans_txq_scd_cfg cfg = {
1972                 .fifo = fifo,
1973                 .sta_id = sta_id,
1974                 .tid = IWL_MAX_TID_COUNT,
1975                 .aggregate = false,
1976                 .frame_limit = IWL_FRAME_LIMIT,
1977         };
1978 
1979         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1980 
1981         iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
1982 }
1983 
1984 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
1985 {
1986         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1987                 mvm->trans->trans_cfg->base_params->wd_timeout :
1988                 IWL_WATCHDOG_DISABLED;
1989 
1990         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1991 
1992         return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT,
1993                                        wdg_timeout);
1994 }
1995 
1996 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
1997                                           int maccolor,
1998                                           struct iwl_mvm_int_sta *sta,
1999                                           u16 *queue, int fifo)
2000 {
2001         int ret;
2002 
2003         /* Map queue to fifo - needs to happen before adding station */
2004         if (!iwl_mvm_has_new_tx_api(mvm))
2005                 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2006 
2007         ret = iwl_mvm_add_int_sta_common(mvm, sta, NULL, macidx, maccolor);
2008         if (ret) {
2009                 if (!iwl_mvm_has_new_tx_api(mvm))
2010                         iwl_mvm_disable_txq(mvm, NULL, *queue,
2011                                             IWL_MAX_TID_COUNT, 0);
2012                 return ret;
2013         }
2014 
2015         /*
2016          * For 22000 firmware and on we cannot add queue to a station unknown
2017          * to firmware so enable queue here - after the station was added
2018          */
2019         if (iwl_mvm_has_new_tx_api(mvm)) {
2020                 int txq;
2021 
2022                 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2023                 if (txq < 0) {
2024                         iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2025                         return txq;
2026                 }
2027 
2028                 *queue = txq;
2029         }
2030 
2031         return 0;
2032 }
2033 
2034 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
2035 {
2036         int ret;
2037 
2038         lockdep_assert_held(&mvm->mutex);
2039 
2040         /* Allocate aux station and assign to it the aux queue */
2041         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
2042                                        NL80211_IFTYPE_UNSPECIFIED,
2043                                        IWL_STA_AUX_ACTIVITY);
2044         if (ret)
2045                 return ret;
2046 
2047         ret = iwl_mvm_add_int_sta_with_queue(mvm, MAC_INDEX_AUX, 0,
2048                                              &mvm->aux_sta, &mvm->aux_queue,
2049                                              IWL_MVM_TX_FIFO_MCAST);
2050         if (ret) {
2051                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2052                 return ret;
2053         }
2054 
2055         return 0;
2056 }
2057 
2058 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2059 {
2060         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2061 
2062         lockdep_assert_held(&mvm->mutex);
2063 
2064         return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2065                                               &mvm->snif_sta, &mvm->snif_queue,
2066                                               IWL_MVM_TX_FIFO_BE);
2067 }
2068 
2069 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2070 {
2071         int ret;
2072 
2073         lockdep_assert_held(&mvm->mutex);
2074 
2075         iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0);
2076         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2077         if (ret)
2078                 IWL_WARN(mvm, "Failed sending remove station\n");
2079 
2080         return ret;
2081 }
2082 
2083 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2084 {
2085         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2086 }
2087 
2088 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
2089 {
2090         lockdep_assert_held(&mvm->mutex);
2091 
2092         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2093 }
2094 
2095 /*
2096  * Send the add station command for the vif's broadcast station.
2097  * Assumes that the station was already allocated.
2098  *
2099  * @mvm: the mvm component
2100  * @vif: the interface to which the broadcast station is added
2101  * @bsta: the broadcast station to add.
2102  */
2103 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2104 {
2105         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2106         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2107         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2108         const u8 *baddr = _baddr;
2109         int queue;
2110         int ret;
2111         unsigned int wdg_timeout =
2112                 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2113         struct iwl_trans_txq_scd_cfg cfg = {
2114                 .fifo = IWL_MVM_TX_FIFO_VO,
2115                 .sta_id = mvmvif->bcast_sta.sta_id,
2116                 .tid = IWL_MAX_TID_COUNT,
2117                 .aggregate = false,
2118                 .frame_limit = IWL_FRAME_LIMIT,
2119         };
2120 
2121         lockdep_assert_held(&mvm->mutex);
2122 
2123         if (!iwl_mvm_has_new_tx_api(mvm)) {
2124                 if (vif->type == NL80211_IFTYPE_AP ||
2125                     vif->type == NL80211_IFTYPE_ADHOC) {
2126                         queue = mvm->probe_queue;
2127                 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2128                         queue = mvm->p2p_dev_queue;
2129                 } else {
2130                         WARN(1, "Missing required TXQ for adding bcast STA\n");
2131                         return -EINVAL;
2132                 }
2133 
2134                 bsta->tfd_queue_msk |= BIT(queue);
2135 
2136                 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2137         }
2138 
2139         if (vif->type == NL80211_IFTYPE_ADHOC)
2140                 baddr = vif->bss_conf.bssid;
2141 
2142         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2143                 return -ENOSPC;
2144 
2145         ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2146                                          mvmvif->id, mvmvif->color);
2147         if (ret)
2148                 return ret;
2149 
2150         /*
2151          * For 22000 firmware and on we cannot add queue to a station unknown
2152          * to firmware so enable queue here - after the station was added
2153          */
2154         if (iwl_mvm_has_new_tx_api(mvm)) {
2155                 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id,
2156                                                 IWL_MAX_TID_COUNT,
2157                                                 wdg_timeout);
2158                 if (queue < 0) {
2159                         iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2160                         return queue;
2161                 }
2162 
2163                 if (vif->type == NL80211_IFTYPE_AP ||
2164                     vif->type == NL80211_IFTYPE_ADHOC)
2165                         mvm->probe_queue = queue;
2166                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2167                         mvm->p2p_dev_queue = queue;
2168         }
2169 
2170         return 0;
2171 }
2172 
2173 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2174                                           struct ieee80211_vif *vif)
2175 {
2176         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2177         int queue;
2178 
2179         lockdep_assert_held(&mvm->mutex);
2180 
2181         iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
2182 
2183         switch (vif->type) {
2184         case NL80211_IFTYPE_AP:
2185         case NL80211_IFTYPE_ADHOC:
2186                 queue = mvm->probe_queue;
2187                 break;
2188         case NL80211_IFTYPE_P2P_DEVICE:
2189                 queue = mvm->p2p_dev_queue;
2190                 break;
2191         default:
2192                 WARN(1, "Can't free bcast queue on vif type %d\n",
2193                      vif->type);
2194                 return;
2195         }
2196 
2197         iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0);
2198         if (iwl_mvm_has_new_tx_api(mvm))
2199                 return;
2200 
2201         WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2202         mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2203 }
2204 
2205 /* Send the FW a request to remove the station from it's internal data
2206  * structures, but DO NOT remove the entry from the local data structures. */
2207 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2208 {
2209         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2210         int ret;
2211 
2212         lockdep_assert_held(&mvm->mutex);
2213 
2214         iwl_mvm_free_bcast_sta_queues(mvm, vif);
2215 
2216         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2217         if (ret)
2218                 IWL_WARN(mvm, "Failed sending remove station\n");
2219         return ret;
2220 }
2221 
2222 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2223 {
2224         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2225 
2226         lockdep_assert_held(&mvm->mutex);
2227 
2228         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
2229                                         ieee80211_vif_type_p2p(vif),
2230                                         IWL_STA_GENERAL_PURPOSE);
2231 }
2232 
2233 /* Allocate a new station entry for the broadcast station to the given vif,
2234  * and send it to the FW.
2235  * Note that each P2P mac should have its own broadcast station.
2236  *
2237  * @mvm: the mvm component
2238  * @vif: the interface to which the broadcast station is added
2239  * @bsta: the broadcast station to add. */
2240 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2241 {
2242         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2243         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2244         int ret;
2245 
2246         lockdep_assert_held(&mvm->mutex);
2247 
2248         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2249         if (ret)
2250                 return ret;
2251 
2252         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2253 
2254         if (ret)
2255                 iwl_mvm_dealloc_int_sta(mvm, bsta);
2256 
2257         return ret;
2258 }
2259 
2260 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2261 {
2262         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2263 
2264         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2265 }
2266 
2267 /*
2268  * Send the FW a request to remove the station from it's internal data
2269  * structures, and in addition remove it from the local data structure.
2270  */
2271 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2272 {
2273         int ret;
2274 
2275         lockdep_assert_held(&mvm->mutex);
2276 
2277         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2278 
2279         iwl_mvm_dealloc_bcast_sta(mvm, vif);
2280 
2281         return ret;
2282 }
2283 
2284 /*
2285  * Allocate a new station entry for the multicast station to the given vif,
2286  * and send it to the FW.
2287  * Note that each AP/GO mac should have its own multicast station.
2288  *
2289  * @mvm: the mvm component
2290  * @vif: the interface to which the multicast station is added
2291  */
2292 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2293 {
2294         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2295         struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2296         static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2297         const u8 *maddr = _maddr;
2298         struct iwl_trans_txq_scd_cfg cfg = {
2299                 .fifo = vif->type == NL80211_IFTYPE_AP ?
2300                         IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2301                 .sta_id = msta->sta_id,
2302                 .tid = 0,
2303                 .aggregate = false,
2304                 .frame_limit = IWL_FRAME_LIMIT,
2305         };
2306         unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2307         int ret;
2308 
2309         lockdep_assert_held(&mvm->mutex);
2310 
2311         if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2312                     vif->type != NL80211_IFTYPE_ADHOC))
2313                 return -ENOTSUPP;
2314 
2315         /*
2316          * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2317          * invalid, so make sure we use the queue we want.
2318          * Note that this is done here as we want to avoid making DQA
2319          * changes in mac80211 layer.
2320          */
2321         if (vif->type == NL80211_IFTYPE_ADHOC)
2322                 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2323 
2324         /*
2325          * While in previous FWs we had to exclude cab queue from TFD queue
2326          * mask, now it is needed as any other queue.
2327          */
2328         if (!iwl_mvm_has_new_tx_api(mvm) &&
2329             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2330                 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2331                                    timeout);
2332                 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue);
2333         }
2334         ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2335                                          mvmvif->id, mvmvif->color);
2336         if (ret)
2337                 goto err;
2338 
2339         /*
2340          * Enable cab queue after the ADD_STA command is sent.
2341          * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2342          * command with unknown station id, and for FW that doesn't support
2343          * station API since the cab queue is not included in the
2344          * tfd_queue_mask.
2345          */
2346         if (iwl_mvm_has_new_tx_api(mvm)) {
2347                 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id,
2348                                                     0,
2349                                                     timeout);
2350                 if (queue < 0) {
2351                         ret = queue;
2352                         goto err;
2353                 }
2354                 mvmvif->cab_queue = queue;
2355         } else if (!fw_has_api(&mvm->fw->ucode_capa,
2356                                IWL_UCODE_TLV_API_STA_TYPE))
2357                 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2358                                    timeout);
2359 
2360         return 0;
2361 err:
2362         iwl_mvm_dealloc_int_sta(mvm, msta);
2363         return ret;
2364 }
2365 
2366 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2367                                     struct ieee80211_key_conf *keyconf,
2368                                     bool mcast)
2369 {
2370         union {
2371                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2372                 struct iwl_mvm_add_sta_key_cmd cmd;
2373         } u = {};
2374         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2375                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2376         __le16 key_flags;
2377         int ret, size;
2378         u32 status;
2379 
2380         /* This is a valid situation for GTK removal */
2381         if (sta_id == IWL_MVM_INVALID_STA)
2382                 return 0;
2383 
2384         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2385                                  STA_KEY_FLG_KEYID_MSK);
2386         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2387         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2388 
2389         if (mcast)
2390                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2391 
2392         /*
2393          * The fields assigned here are in the same location at the start
2394          * of the command, so we can do this union trick.
2395          */
2396         u.cmd.common.key_flags = key_flags;
2397         u.cmd.common.key_offset = keyconf->hw_key_idx;
2398         u.cmd.common.sta_id = sta_id;
2399 
2400         size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2401 
2402         status = ADD_STA_SUCCESS;
2403         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2404                                           &status);
2405 
2406         switch (status) {
2407         case ADD_STA_SUCCESS:
2408                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2409                 break;
2410         default:
2411                 ret = -EIO;
2412                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2413                 break;
2414         }
2415 
2416         return ret;
2417 }
2418 
2419 /*
2420  * Send the FW a request to remove the station from it's internal data
2421  * structures, and in addition remove it from the local data structure.
2422  */
2423 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2424 {
2425         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2426         int ret;
2427 
2428         lockdep_assert_held(&mvm->mutex);
2429 
2430         iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2431 
2432         iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0);
2433 
2434         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2435         if (ret)
2436                 IWL_WARN(mvm, "Failed sending remove station\n");
2437 
2438         return ret;
2439 }
2440 
2441 #define IWL_MAX_RX_BA_SESSIONS 16
2442 
2443 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2444 {
2445         struct iwl_mvm_rss_sync_notif notif = {
2446                 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2447                 .metadata.sync = 1,
2448                 .delba.baid = baid,
2449         };
2450         iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2451 };
2452 
2453 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2454                                  struct iwl_mvm_baid_data *data)
2455 {
2456         int i;
2457 
2458         iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2459 
2460         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2461                 int j;
2462                 struct iwl_mvm_reorder_buffer *reorder_buf =
2463                         &data->reorder_buf[i];
2464                 struct iwl_mvm_reorder_buf_entry *entries =
2465                         &data->entries[i * data->entries_per_queue];
2466 
2467                 spin_lock_bh(&reorder_buf->lock);
2468                 if (likely(!reorder_buf->num_stored)) {
2469                         spin_unlock_bh(&reorder_buf->lock);
2470                         continue;
2471                 }
2472 
2473                 /*
2474                  * This shouldn't happen in regular DELBA since the internal
2475                  * delBA notification should trigger a release of all frames in
2476                  * the reorder buffer.
2477                  */
2478                 WARN_ON(1);
2479 
2480                 for (j = 0; j < reorder_buf->buf_size; j++)
2481                         __skb_queue_purge(&entries[j].e.frames);
2482                 /*
2483                  * Prevent timer re-arm. This prevents a very far fetched case
2484                  * where we timed out on the notification. There may be prior
2485                  * RX frames pending in the RX queue before the notification
2486                  * that might get processed between now and the actual deletion
2487                  * and we would re-arm the timer although we are deleting the
2488                  * reorder buffer.
2489                  */
2490                 reorder_buf->removed = true;
2491                 spin_unlock_bh(&reorder_buf->lock);
2492                 del_timer_sync(&reorder_buf->reorder_timer);
2493         }
2494 }
2495 
2496 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2497                                         struct iwl_mvm_baid_data *data,
2498                                         u16 ssn, u16 buf_size)
2499 {
2500         int i;
2501 
2502         for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2503                 struct iwl_mvm_reorder_buffer *reorder_buf =
2504                         &data->reorder_buf[i];
2505                 struct iwl_mvm_reorder_buf_entry *entries =
2506                         &data->entries[i * data->entries_per_queue];
2507                 int j;
2508 
2509                 reorder_buf->num_stored = 0;
2510                 reorder_buf->head_sn = ssn;
2511                 reorder_buf->buf_size = buf_size;
2512                 /* rx reorder timer */
2513                 timer_setup(&reorder_buf->reorder_timer,
2514                             iwl_mvm_reorder_timer_expired, 0);
2515                 spin_lock_init(&reorder_buf->lock);
2516                 reorder_buf->mvm = mvm;
2517                 reorder_buf->queue = i;
2518                 reorder_buf->valid = false;
2519                 for (j = 0; j < reorder_buf->buf_size; j++)
2520                         __skb_queue_head_init(&entries[j].e.frames);
2521         }
2522 }
2523 
2524 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2525                        int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2526 {
2527         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2528         struct iwl_mvm_add_sta_cmd cmd = {};
2529         struct iwl_mvm_baid_data *baid_data = NULL;
2530         int ret;
2531         u32 status;
2532 
2533         lockdep_assert_held(&mvm->mutex);
2534 
2535         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2536                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2537                 return -ENOSPC;
2538         }
2539 
2540         if (iwl_mvm_has_new_rx_api(mvm) && start) {
2541                 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2542 
2543                 /* sparse doesn't like the __align() so don't check */
2544 #ifndef __CHECKER__
2545                 /*
2546                  * The division below will be OK if either the cache line size
2547                  * can be divided by the entry size (ALIGN will round up) or if
2548                  * if the entry size can be divided by the cache line size, in
2549                  * which case the ALIGN() will do nothing.
2550                  */
2551                 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2552                              sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2553 #endif
2554 
2555                 /*
2556                  * Upward align the reorder buffer size to fill an entire cache
2557                  * line for each queue, to avoid sharing cache lines between
2558                  * different queues.
2559                  */
2560                 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2561 
2562                 /*
2563                  * Allocate here so if allocation fails we can bail out early
2564                  * before starting the BA session in the firmware
2565                  */
2566                 baid_data = kzalloc(sizeof(*baid_data) +
2567                                     mvm->trans->num_rx_queues *
2568                                     reorder_buf_size,
2569                                     GFP_KERNEL);
2570                 if (!baid_data)
2571                         return -ENOMEM;
2572 
2573                 /*
2574                  * This division is why we need the above BUILD_BUG_ON(),
2575                  * if that doesn't hold then this will not be right.
2576                  */
2577                 baid_data->entries_per_queue =
2578                         reorder_buf_size / sizeof(baid_data->entries[0]);
2579         }
2580 
2581         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2582         cmd.sta_id = mvm_sta->sta_id;
2583         cmd.add_modify = STA_MODE_MODIFY;
2584         if (start) {
2585                 cmd.add_immediate_ba_tid = (u8) tid;
2586                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2587                 cmd.rx_ba_window = cpu_to_le16(buf_size);
2588         } else {
2589                 cmd.remove_immediate_ba_tid = (u8) tid;
2590         }
2591         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2592                                   STA_MODIFY_REMOVE_BA_TID;
2593 
2594         status = ADD_STA_SUCCESS;
2595         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2596                                           iwl_mvm_add_sta_cmd_size(mvm),
2597                                           &cmd, &status);
2598         if (ret)
2599                 goto out_free;
2600 
2601         switch (status & IWL_ADD_STA_STATUS_MASK) {
2602         case ADD_STA_SUCCESS:
2603                 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2604                              start ? "start" : "stopp");
2605                 break;
2606         case ADD_STA_IMMEDIATE_BA_FAILURE:
2607                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2608                 ret = -ENOSPC;
2609                 break;
2610         default:
2611                 ret = -EIO;
2612                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2613                         start ? "start" : "stopp", status);
2614                 break;
2615         }
2616 
2617         if (ret)
2618                 goto out_free;
2619 
2620         if (start) {
2621                 u8 baid;
2622 
2623                 mvm->rx_ba_sessions++;
2624 
2625                 if (!iwl_mvm_has_new_rx_api(mvm))
2626                         return 0;
2627 
2628                 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2629                         ret = -EINVAL;
2630                         goto out_free;
2631                 }
2632                 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2633                             IWL_ADD_STA_BAID_SHIFT);
2634                 baid_data->baid = baid;
2635                 baid_data->timeout = timeout;
2636                 baid_data->last_rx = jiffies;
2637                 baid_data->rcu_ptr = &mvm->baid_map[baid];
2638                 timer_setup(&baid_data->session_timer,
2639                             iwl_mvm_rx_agg_session_expired, 0);
2640                 baid_data->mvm = mvm;
2641                 baid_data->tid = tid;
2642                 baid_data->sta_id = mvm_sta->sta_id;
2643 
2644                 mvm_sta->tid_to_baid[tid] = baid;
2645                 if (timeout)
2646                         mod_timer(&baid_data->session_timer,
2647                                   TU_TO_EXP_TIME(timeout * 2));
2648 
2649                 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2650                 /*
2651                  * protect the BA data with RCU to cover a case where our
2652                  * internal RX sync mechanism will timeout (not that it's
2653                  * supposed to happen) and we will free the session data while
2654                  * RX is being processed in parallel
2655                  */
2656                 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2657                              mvm_sta->sta_id, tid, baid);
2658                 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2659                 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2660         } else  {
2661                 u8 baid = mvm_sta->tid_to_baid[tid];
2662 
2663                 if (mvm->rx_ba_sessions > 0)
2664                         /* check that restart flow didn't zero the counter */
2665                         mvm->rx_ba_sessions--;
2666                 if (!iwl_mvm_has_new_rx_api(mvm))
2667                         return 0;
2668 
2669                 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2670                         return -EINVAL;
2671 
2672                 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2673                 if (WARN_ON(!baid_data))
2674                         return -EINVAL;
2675 
2676                 /* synchronize all rx queues so we can safely delete */
2677                 iwl_mvm_free_reorder(mvm, baid_data);
2678                 del_timer_sync(&baid_data->session_timer);
2679                 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2680                 kfree_rcu(baid_data, rcu_head);
2681                 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2682         }
2683         return 0;
2684 
2685 out_free:
2686         kfree(baid_data);
2687         return ret;
2688 }
2689 
2690 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2691                        int tid, u8 queue, bool start)
2692 {
2693         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2694         struct iwl_mvm_add_sta_cmd cmd = {};
2695         int ret;
2696         u32 status;
2697 
2698         lockdep_assert_held(&mvm->mutex);
2699 
2700         if (start) {
2701                 mvm_sta->tfd_queue_msk |= BIT(queue);
2702                 mvm_sta->tid_disable_agg &= ~BIT(tid);
2703         } else {
2704                 /* In DQA-mode the queue isn't removed on agg termination */
2705                 mvm_sta->tid_disable_agg |= BIT(tid);
2706         }
2707 
2708         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2709         cmd.sta_id = mvm_sta->sta_id;
2710         cmd.add_modify = STA_MODE_MODIFY;
2711         if (!iwl_mvm_has_new_tx_api(mvm))
2712                 cmd.modify_mask = STA_MODIFY_QUEUES;
2713         cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2714         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2715         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2716 
2717         status = ADD_STA_SUCCESS;
2718         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2719                                           iwl_mvm_add_sta_cmd_size(mvm),
2720                                           &cmd, &status);
2721         if (ret)
2722                 return ret;
2723 
2724         switch (status & IWL_ADD_STA_STATUS_MASK) {
2725         case ADD_STA_SUCCESS:
2726                 break;
2727         default:
2728                 ret = -EIO;
2729                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2730                         start ? "start" : "stopp", status);
2731                 break;
2732         }
2733 
2734         return ret;
2735 }
2736 
2737 const u8 tid_to_mac80211_ac[] = {
2738         IEEE80211_AC_BE,
2739         IEEE80211_AC_BK,
2740         IEEE80211_AC_BK,
2741         IEEE80211_AC_BE,
2742         IEEE80211_AC_VI,
2743         IEEE80211_AC_VI,
2744         IEEE80211_AC_VO,
2745         IEEE80211_AC_VO,
2746         IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2747 };
2748 
2749 static const u8 tid_to_ucode_ac[] = {
2750         AC_BE,
2751         AC_BK,
2752         AC_BK,
2753         AC_BE,
2754         AC_VI,
2755         AC_VI,
2756         AC_VO,
2757         AC_VO,
2758 };
2759 
2760 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2761                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2762 {
2763         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2764         struct iwl_mvm_tid_data *tid_data;
2765         u16 normalized_ssn;
2766         u16 txq_id;
2767         int ret;
2768 
2769         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2770                 return -EINVAL;
2771 
2772         if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2773             mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2774                 IWL_ERR(mvm,
2775                         "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2776                         mvmsta->tid_data[tid].state);
2777                 return -ENXIO;
2778         }
2779 
2780         lockdep_assert_held(&mvm->mutex);
2781 
2782         if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2783             iwl_mvm_has_new_tx_api(mvm)) {
2784                 u8 ac = tid_to_mac80211_ac[tid];
2785 
2786                 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2787                 if (ret)
2788                         return ret;
2789         }
2790 
2791         spin_lock_bh(&mvmsta->lock);
2792 
2793         /*
2794          * Note the possible cases:
2795          *  1. An enabled TXQ - TXQ needs to become agg'ed
2796          *  2. The TXQ hasn't yet been enabled, so find a free one and mark
2797          *      it as reserved
2798          */
2799         txq_id = mvmsta->tid_data[tid].txq_id;
2800         if (txq_id == IWL_MVM_INVALID_QUEUE) {
2801                 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2802                                               IWL_MVM_DQA_MIN_DATA_QUEUE,
2803                                               IWL_MVM_DQA_MAX_DATA_QUEUE);
2804                 if (ret < 0) {
2805                         IWL_ERR(mvm, "Failed to allocate agg queue\n");
2806                         goto out;
2807                 }
2808 
2809                 txq_id = ret;
2810 
2811                 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2812                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2813         } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
2814                 ret = -ENXIO;
2815                 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
2816                         tid, IWL_MAX_HW_QUEUES - 1);
2817                 goto out;
2818 
2819         } else if (unlikely(mvm->queue_info[txq_id].status ==
2820                             IWL_MVM_QUEUE_SHARED)) {
2821                 ret = -ENXIO;
2822                 IWL_DEBUG_TX_QUEUES(mvm,
2823                                     "Can't start tid %d agg on shared queue!\n",
2824                                     tid);
2825                 goto out;
2826         }
2827 
2828         IWL_DEBUG_TX_QUEUES(mvm,
2829                             "AGG for tid %d will be on queue #%d\n",
2830                             tid, txq_id);
2831 
2832         tid_data = &mvmsta->tid_data[tid];
2833         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2834         tid_data->txq_id = txq_id;
2835         *ssn = tid_data->ssn;
2836 
2837         IWL_DEBUG_TX_QUEUES(mvm,
2838                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2839                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2840                             tid_data->next_reclaimed);
2841 
2842         /*
2843          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2844          * to align the wrap around of ssn so we compare relevant values.
2845          */
2846         normalized_ssn = tid_data->ssn;
2847         if (mvm->trans->trans_cfg->gen2)
2848                 normalized_ssn &= 0xff;
2849 
2850         if (normalized_ssn == tid_data->next_reclaimed) {
2851                 tid_data->state = IWL_AGG_STARTING;
2852                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2853         } else {
2854                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2855         }
2856 
2857         ret = 0;
2858 
2859 out:
2860         spin_unlock_bh(&mvmsta->lock);
2861 
2862         return ret;
2863 }
2864 
2865 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2866                             struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2867                             bool amsdu)
2868 {
2869         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2870         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2871         unsigned int wdg_timeout =
2872                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2873         int queue, ret;
2874         bool alloc_queue = true;
2875         enum iwl_mvm_queue_status queue_status;
2876         u16 ssn;
2877 
2878         struct iwl_trans_txq_scd_cfg cfg = {
2879                 .sta_id = mvmsta->sta_id,
2880                 .tid = tid,
2881                 .frame_limit = buf_size,
2882                 .aggregate = true,
2883         };
2884 
2885         /*
2886          * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2887          * manager, so this function should never be called in this case.
2888          */
2889         if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2890                 return -EINVAL;
2891 
2892         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2893                      != IWL_MAX_TID_COUNT);
2894 
2895         spin_lock_bh(&mvmsta->lock);
2896         ssn = tid_data->ssn;
2897         queue = tid_data->txq_id;
2898         tid_data->state = IWL_AGG_ON;
2899         mvmsta->agg_tids |= BIT(tid);
2900         tid_data->ssn = 0xffff;
2901         tid_data->amsdu_in_ampdu_allowed = amsdu;
2902         spin_unlock_bh(&mvmsta->lock);
2903 
2904         if (iwl_mvm_has_new_tx_api(mvm)) {
2905                 /*
2906                  * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2907                  * would have failed, so if we are here there is no need to
2908                  * allocate a queue.
2909                  * However, if aggregation size is different than the default
2910                  * size, the scheduler should be reconfigured.
2911                  * We cannot do this with the new TX API, so return unsupported
2912                  * for now, until it will be offloaded to firmware..
2913                  * Note that if SCD default value changes - this condition
2914                  * should be updated as well.
2915                  */
2916                 if (buf_size < IWL_FRAME_LIMIT)
2917                         return -ENOTSUPP;
2918 
2919                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2920                 if (ret)
2921                         return -EIO;
2922                 goto out;
2923         }
2924 
2925         cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2926 
2927         queue_status = mvm->queue_info[queue].status;
2928 
2929         /* Maybe there is no need to even alloc a queue... */
2930         if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2931                 alloc_queue = false;
2932 
2933         /*
2934          * Only reconfig the SCD for the queue if the window size has
2935          * changed from current (become smaller)
2936          */
2937         if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2938                 /*
2939                  * If reconfiguring an existing queue, it first must be
2940                  * drained
2941                  */
2942                 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2943                                                      BIT(queue));
2944                 if (ret) {
2945                         IWL_ERR(mvm,
2946                                 "Error draining queue before reconfig\n");
2947                         return ret;
2948                 }
2949 
2950                 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2951                                            mvmsta->sta_id, tid,
2952                                            buf_size, ssn);
2953                 if (ret) {
2954                         IWL_ERR(mvm,
2955                                 "Error reconfiguring TXQ #%d\n", queue);
2956                         return ret;
2957                 }
2958         }
2959 
2960         if (alloc_queue)
2961                 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
2962                                    &cfg, wdg_timeout);
2963 
2964         /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2965         if (queue_status != IWL_MVM_QUEUE_SHARED) {
2966                 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2967                 if (ret)
2968                         return -EIO;
2969         }
2970 
2971         /* No need to mark as reserved */
2972         mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2973 
2974 out:
2975         /*
2976          * Even though in theory the peer could have different
2977          * aggregation reorder buffer sizes for different sessions,
2978          * our ucode doesn't allow for that and has a global limit
2979          * for each station. Therefore, use the minimum of all the
2980          * aggregation sessions and our default value.
2981          */
2982         mvmsta->max_agg_bufsize =
2983                 min(mvmsta->max_agg_bufsize, buf_size);
2984         mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2985 
2986         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2987                      sta->addr, tid);
2988 
2989         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq);
2990 }
2991 
2992 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2993                                         struct iwl_mvm_sta *mvmsta,
2994                                         struct iwl_mvm_tid_data *tid_data)
2995 {
2996         u16 txq_id = tid_data->txq_id;
2997 
2998         lockdep_assert_held(&mvm->mutex);
2999 
3000         if (iwl_mvm_has_new_tx_api(mvm))
3001                 return;
3002 
3003         /*
3004          * The TXQ is marked as reserved only if no traffic came through yet
3005          * This means no traffic has been sent on this TID (agg'd or not), so
3006          * we no longer have use for the queue. Since it hasn't even been
3007          * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3008          * free.
3009          */
3010         if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3011                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3012                 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3013         }
3014 }
3015 
3016 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3017                             struct ieee80211_sta *sta, u16 tid)
3018 {
3019         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3020         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3021         u16 txq_id;
3022         int err;
3023 
3024         /*
3025          * If mac80211 is cleaning its state, then say that we finished since
3026          * our state has been cleared anyway.
3027          */
3028         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3029                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3030                 return 0;
3031         }
3032 
3033         spin_lock_bh(&mvmsta->lock);
3034 
3035         txq_id = tid_data->txq_id;
3036 
3037         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3038                             mvmsta->sta_id, tid, txq_id, tid_data->state);
3039 
3040         mvmsta->agg_tids &= ~BIT(tid);
3041 
3042         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3043 
3044         switch (tid_data->state) {
3045         case IWL_AGG_ON:
3046                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3047 
3048                 IWL_DEBUG_TX_QUEUES(mvm,
3049                                     "ssn = %d, next_recl = %d\n",
3050                                     tid_data->ssn, tid_data->next_reclaimed);
3051 
3052                 tid_data->ssn = 0xffff;
3053                 tid_data->state = IWL_AGG_OFF;
3054                 spin_unlock_bh(&mvmsta->lock);
3055 
3056                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3057 
3058                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3059                 return 0;
3060         case IWL_AGG_STARTING:
3061         case IWL_EMPTYING_HW_QUEUE_ADDBA:
3062                 /*
3063                  * The agg session has been stopped before it was set up. This
3064                  * can happen when the AddBA timer times out for example.
3065                  */
3066 
3067                 /* No barriers since we are under mutex */
3068                 lockdep_assert_held(&mvm->mutex);
3069 
3070                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3071                 tid_data->state = IWL_AGG_OFF;
3072                 err = 0;
3073                 break;
3074         default:
3075                 IWL_ERR(mvm,
3076                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3077                         mvmsta->sta_id, tid, tid_data->state);
3078                 IWL_ERR(mvm,
3079                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3080                 err = -EINVAL;
3081         }
3082 
3083         spin_unlock_bh(&mvmsta->lock);
3084 
3085         return err;
3086 }
3087 
3088 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3089                             struct ieee80211_sta *sta, u16 tid)
3090 {
3091         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3092         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3093         u16 txq_id;
3094         enum iwl_mvm_agg_state old_state;
3095 
3096         /*
3097          * First set the agg state to OFF to avoid calling
3098          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3099          */
3100         spin_lock_bh(&mvmsta->lock);
3101         txq_id = tid_data->txq_id;
3102         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3103                             mvmsta->sta_id, tid, txq_id, tid_data->state);
3104         old_state = tid_data->state;
3105         tid_data->state = IWL_AGG_OFF;
3106         mvmsta->agg_tids &= ~BIT(tid);
3107         spin_unlock_bh(&mvmsta->lock);
3108 
3109         iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3110 
3111         if (old_state >= IWL_AGG_ON) {
3112                 iwl_mvm_drain_sta(mvm, mvmsta, true);
3113 
3114                 if (iwl_mvm_has_new_tx_api(mvm)) {
3115                         if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
3116                                                    BIT(tid), 0))
3117                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3118                         iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3119                 } else {
3120                         if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
3121                                 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3122                         iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3123                 }
3124 
3125                 iwl_mvm_drain_sta(mvm, mvmsta, false);
3126 
3127                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3128         }
3129 
3130         return 0;
3131 }
3132 
3133 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3134 {
3135         int i, max = -1, max_offs = -1;
3136 
3137         lockdep_assert_held(&mvm->mutex);
3138 
3139         /* Pick the unused key offset with the highest 'deleted'
3140          * counter. Every time a key is deleted, all the counters
3141          * are incremented and the one that was just deleted is
3142          * reset to zero. Thus, the highest counter is the one
3143          * that was deleted longest ago. Pick that one.
3144          */
3145         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3146                 if (test_bit(i, mvm->fw_key_table))
3147                         continue;
3148                 if (mvm->fw_key_deleted[i] > max) {
3149                         max = mvm->fw_key_deleted[i];
3150                         max_offs = i;
3151                 }
3152         }
3153 
3154         if (max_offs < 0)
3155                 return STA_KEY_IDX_INVALID;
3156 
3157         return max_offs;
3158 }
3159 
3160 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3161                                                struct ieee80211_vif *vif,
3162                                                struct ieee80211_sta *sta)
3163 {
3164         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3165 
3166         if (sta)
3167                 return iwl_mvm_sta_from_mac80211(sta);
3168 
3169         /*
3170          * The device expects GTKs for station interfaces to be
3171          * installed as GTKs for the AP station. If we have no
3172          * station ID, then use AP's station ID.
3173          */
3174         if (vif->type == NL80211_IFTYPE_STATION &&
3175             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3176                 u8 sta_id = mvmvif->ap_sta_id;
3177 
3178                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3179                                             lockdep_is_held(&mvm->mutex));
3180 
3181                 /*
3182                  * It is possible that the 'sta' parameter is NULL,
3183                  * for example when a GTK is removed - the sta_id will then
3184                  * be the AP ID, and no station was passed by mac80211.
3185                  */
3186                 if (IS_ERR_OR_NULL(sta))
3187                         return NULL;
3188 
3189                 return iwl_mvm_sta_from_mac80211(sta);
3190         }
3191 
3192         return NULL;
3193 }
3194 
3195 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3196                                 u32 sta_id,
3197                                 struct ieee80211_key_conf *key, bool mcast,
3198                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3199                                 u8 key_offset, bool mfp)
3200 {
3201         union {
3202                 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3203                 struct iwl_mvm_add_sta_key_cmd cmd;
3204         } u = {};
3205         __le16 key_flags;
3206         int ret;
3207         u32 status;
3208         u16 keyidx;
3209         u64 pn = 0;
3210         int i, size;
3211         bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3212                                   IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3213 
3214         if (sta_id == IWL_MVM_INVALID_STA)
3215                 return -EINVAL;
3216 
3217         keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3218                  STA_KEY_FLG_KEYID_MSK;
3219         key_flags = cpu_to_le16(keyidx);
3220         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3221 
3222         switch (key->cipher) {
3223         case WLAN_CIPHER_SUITE_TKIP:
3224                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3225                 if (new_api) {
3226                         memcpy((void *)&u.cmd.tx_mic_key,
3227                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3228                                IWL_MIC_KEY_SIZE);
3229 
3230                         memcpy((void *)&u.cmd.rx_mic_key,
3231                                &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3232                                IWL_MIC_KEY_SIZE);
3233                         pn = atomic64_read(&key->tx_pn);
3234 
3235                 } else {
3236                         u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3237                         for (i = 0; i < 5; i++)
3238                                 u.cmd_v1.tkip_rx_ttak[i] =
3239                                         cpu_to_le16(tkip_p1k[i]);
3240                 }
3241                 memcpy(u.cmd.common.key, key->key, key->keylen);
3242                 break;
3243         case WLAN_CIPHER_SUITE_CCMP:
3244                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3245                 memcpy(u.cmd.common.key, key->key, key->keylen);
3246                 if (new_api)
3247                         pn = atomic64_read(&key->tx_pn);
3248                 break;
3249         case WLAN_CIPHER_SUITE_WEP104:
3250                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3251                 /* fall through */
3252         case WLAN_CIPHER_SUITE_WEP40:
3253                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3254                 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3255                 break;
3256         case WLAN_CIPHER_SUITE_GCMP_256:
3257                 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3258                 /* fall through */
3259         case WLAN_CIPHER_SUITE_GCMP:
3260                 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3261                 memcpy(u.cmd.common.key, key->key, key->keylen);
3262                 if (new_api)
3263                         pn = atomic64_read(&key->tx_pn);
3264                 break;
3265         default:
3266                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3267                 memcpy(u.cmd.common.key, key->key, key->keylen);
3268         }
3269 
3270         if (mcast)
3271                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3272         if (mfp)
3273                 key_flags |= cpu_to_le16(STA_KEY_MFP);
3274 
3275         u.cmd.common.key_offset = key_offset;
3276         u.cmd.common.key_flags = key_flags;
3277         u.cmd.common.sta_id = sta_id;
3278 
3279         if (new_api) {
3280                 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3281                 size = sizeof(u.cmd);
3282         } else {
3283                 size = sizeof(u.cmd_v1);
3284         }
3285 
3286         status = ADD_STA_SUCCESS;
3287         if (cmd_flags & CMD_ASYNC)
3288                 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3289                                            &u.cmd);
3290         else
3291                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3292                                                   &u.cmd, &status);
3293 
3294         switch (status) {
3295         case ADD_STA_SUCCESS:
3296                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3297                 break;
3298         default:
3299                 ret = -EIO;
3300                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3301                 break;
3302         }
3303 
3304         return ret;
3305 }
3306 
3307 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3308                                  struct ieee80211_key_conf *keyconf,
3309                                  u8 sta_id, bool remove_key)
3310 {
3311         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3312 
3313         /* verify the key details match the required command's expectations */
3314         if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3315                     (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3316                     (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3317                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3318                      keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3319                 return -EINVAL;
3320 
3321         if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3322                     keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3323                 return -EINVAL;
3324 
3325         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3326         igtk_cmd.sta_id = cpu_to_le32(sta_id);
3327 
3328         if (remove_key) {
3329                 /* This is a valid situation for IGTK */
3330                 if (sta_id == IWL_MVM_INVALID_STA)
3331                         return 0;
3332 
3333                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3334         } else {
3335                 struct ieee80211_key_seq seq;
3336                 const u8 *pn;
3337 
3338                 switch (keyconf->cipher) {
3339                 case WLAN_CIPHER_SUITE_AES_CMAC:
3340                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3341                         break;
3342                 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3343                 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3344                         igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3345                         break;
3346                 default:
3347                         return -EINVAL;
3348                 }
3349 
3350                 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3351                 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3352                         igtk_cmd.ctrl_flags |=
3353                                 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3354                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3355                 pn = seq.aes_cmac.pn;
3356                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3357                                                        ((u64) pn[4] << 8) |
3358                                                        ((u64) pn[3] << 16) |
3359                                                        ((u64) pn[2] << 24) |
3360                                                        ((u64) pn[1] << 32) |
3361                                                        ((u64) pn[0] << 40));
3362         }
3363 
3364         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3365                        remove_key ? "removing" : "installing",
3366                        igtk_cmd.sta_id);
3367 
3368         if (!iwl_mvm_has_new_rx_api(mvm)) {
3369                 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3370                         .ctrl_flags = igtk_cmd.ctrl_flags,
3371                         .key_id = igtk_cmd.key_id,
3372                         .sta_id = igtk_cmd.sta_id,
3373                         .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3374                 };
3375 
3376                 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3377                        ARRAY_SIZE(igtk_cmd_v1.igtk));
3378                 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3379                                             sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3380         }
3381         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3382                                     sizeof(igtk_cmd), &igtk_cmd);
3383 }
3384 
3385 
3386 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3387                                        struct ieee80211_vif *vif,
3388                                        struct ieee80211_sta *sta)
3389 {
3390         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3391 
3392         if (sta)
3393                 return sta->addr;
3394 
3395         if (vif->type == NL80211_IFTYPE_STATION &&
3396             mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3397                 u8 sta_id = mvmvif->ap_sta_id;
3398                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3399                                                 lockdep_is_held(&mvm->mutex));
3400                 return sta->addr;
3401         }
3402 
3403 
3404         return NULL;
3405 }
3406 
3407 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3408                                  struct ieee80211_vif *vif,
3409                                  struct ieee80211_sta *sta,
3410                                  struct ieee80211_key_conf *keyconf,
3411                                  u8 key_offset,
3412                                  bool mcast)
3413 {
3414         int ret;
3415         const u8 *addr;
3416         struct ieee80211_key_seq seq;
3417         u16 p1k[5];
3418         u32 sta_id;
3419         bool mfp = false;
3420 
3421         if (sta) {
3422                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3423 
3424                 sta_id = mvm_sta->sta_id;
3425                 mfp = sta->mfp;
3426         } else if (vif->type == NL80211_IFTYPE_AP &&
3427                    !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3428                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3429 
3430                 sta_id = mvmvif->mcast_sta.sta_id;
3431         } else {
3432                 IWL_ERR(mvm, "Failed to find station id\n");
3433                 return -EINVAL;
3434         }
3435 
3436         switch (keyconf->cipher) {
3437         case WLAN_CIPHER_SUITE_TKIP:
3438                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3439                 /* get phase 1 key from mac80211 */
3440                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3441                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3442                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3443                                            seq.tkip.iv32, p1k, 0, key_offset,
3444                                            mfp);
3445                 break;
3446         case WLAN_CIPHER_SUITE_CCMP:
3447         case WLAN_CIPHER_SUITE_WEP40:
3448         case WLAN_CIPHER_SUITE_WEP104:
3449         case WLAN_CIPHER_SUITE_GCMP:
3450         case WLAN_CIPHER_SUITE_GCMP_256:
3451                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3452                                            0, NULL, 0, key_offset, mfp);
3453                 break;
3454         default:
3455                 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3456                                            0, NULL, 0, key_offset, mfp);
3457         }
3458 
3459         return ret;
3460 }
3461 
3462 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3463                         struct ieee80211_vif *vif,
3464                         struct ieee80211_sta *sta,
3465                         struct ieee80211_key_conf *keyconf,
3466                         u8 key_offset)
3467 {
3468         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3469         struct iwl_mvm_sta *mvm_sta;
3470         u8 sta_id = IWL_MVM_INVALID_STA;
3471         int ret;
3472         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3473 
3474         lockdep_assert_held(&mvm->mutex);
3475 
3476         if (vif->type != NL80211_IFTYPE_AP ||
3477             keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3478                 /* Get the station id from the mvm local station table */
3479                 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3480                 if (!mvm_sta) {
3481                         IWL_ERR(mvm, "Failed to find station\n");
3482                         return -EINVAL;
3483                 }
3484                 sta_id = mvm_sta->sta_id;
3485 
3486                 /*
3487                  * It is possible that the 'sta' parameter is NULL, and thus
3488                  * there is a need to retrieve the sta from the local station
3489                  * table.
3490                  */
3491                 if (!sta) {
3492                         sta = rcu_dereference_protected(
3493                                 mvm->fw_id_to_mac_id[sta_id],
3494                                 lockdep_is_held(&mvm->mutex));
3495                         if (IS_ERR_OR_NULL(sta)) {
3496                                 IWL_ERR(mvm, "Invalid station id\n");
3497                                 return -EINVAL;
3498                         }
3499                 }
3500 
3501                 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3502                         return -EINVAL;
3503         } else {
3504                 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3505 
3506                 sta_id = mvmvif->mcast_sta.sta_id;
3507         }
3508 
3509         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3510             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3511             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3512                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3513                 goto end;
3514         }
3515 
3516         /* If the key_offset is not pre-assigned, we need to find a
3517          * new offset to use.  In normal cases, the offset is not
3518          * pre-assigned, but during HW_RESTART we want to reuse the
3519          * same indices, so we pass them when this function is called.
3520          *
3521          * In D3 entry, we need to hardcoded the indices (because the
3522          * firmware hardcodes the PTK offset to 0).  In this case, we
3523          * need to make sure we don't overwrite the hw_key_idx in the
3524          * keyconf structure, because otherwise we cannot configure
3525          * the original ones back when resuming.
3526          */
3527         if (key_offset == STA_KEY_IDX_INVALID) {
3528                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3529                 if (key_offset == STA_KEY_IDX_INVALID)
3530                         return -ENOSPC;
3531                 keyconf->hw_key_idx = key_offset;
3532         }
3533 
3534         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3535         if (ret)
3536                 goto end;
3537 
3538         /*
3539          * For WEP, the same key is used for multicast and unicast. Upload it
3540          * again, using the same key offset, and now pointing the other one
3541          * to the same key slot (offset).
3542          * If this fails, remove the original as well.
3543          */
3544         if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3545              keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3546             sta) {
3547                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3548                                             key_offset, !mcast);
3549                 if (ret) {
3550                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3551                         goto end;
3552                 }
3553         }
3554 
3555         __set_bit(key_offset, mvm->fw_key_table);
3556 
3557 end:
3558         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3559                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3560                       sta ? sta->addr : zero_addr, ret);
3561         return ret;
3562 }
3563 
3564 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3565                            struct ieee80211_vif *vif,
3566                            struct ieee80211_sta *sta,
3567                            struct ieee80211_key_conf *keyconf)
3568 {
3569         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3570         struct iwl_mvm_sta *mvm_sta;
3571         u8 sta_id = IWL_MVM_INVALID_STA;
3572         int ret, i;
3573 
3574         lockdep_assert_held(&mvm->mutex);
3575 
3576         /* Get the station from the mvm local station table */
3577         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3578         if (mvm_sta)
3579                 sta_id = mvm_sta->sta_id;
3580         else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3581                 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3582 
3583 
3584         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3585                       keyconf->keyidx, sta_id);
3586 
3587         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3588             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3589             keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3590                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3591 
3592         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3593                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3594                         keyconf->hw_key_idx);
3595                 return -ENOENT;
3596         }
3597 
3598         /* track which key was deleted last */
3599         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3600                 if (mvm->fw_key_deleted[i] < U8_MAX)
3601                         mvm->fw_key_deleted[i]++;
3602         }
3603         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3604 
3605         if (sta && !mvm_sta) {
3606                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3607                 return 0;
3608         }
3609 
3610         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3611         if (ret)
3612                 return ret;
3613 
3614         /* delete WEP key twice to get rid of (now useless) offset */
3615         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3616             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3617                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3618 
3619         return ret;
3620 }
3621 
3622 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3623                              struct ieee80211_vif *vif,
3624                              struct ieee80211_key_conf *keyconf,
3625                              struct ieee80211_sta *sta, u32 iv32,
3626                              u16 *phase1key)
3627 {
3628         struct iwl_mvm_sta *mvm_sta;
3629         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3630         bool mfp = sta ? sta->mfp : false;
3631 
3632         rcu_read_lock();
3633 
3634         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3635         if (WARN_ON_ONCE(!mvm_sta))
3636                 goto unlock;
3637         iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3638                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3639                              mfp);
3640 
3641  unlock:
3642         rcu_read_unlock();
3643 }
3644 
3645 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3646                                 struct ieee80211_sta *sta)
3647 {
3648         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3649         struct iwl_mvm_add_sta_cmd cmd = {
3650                 .add_modify = STA_MODE_MODIFY,
3651                 .sta_id = mvmsta->sta_id,
3652                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3653                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3654         };
3655         int ret;
3656 
3657         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3658                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3659         if (ret)
3660                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3661 }
3662 
3663 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3664                                        struct ieee80211_sta *sta,
3665                                        enum ieee80211_frame_release_type reason,
3666                                        u16 cnt, u16 tids, bool more_data,
3667                                        bool single_sta_queue)
3668 {
3669         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3670         struct iwl_mvm_add_sta_cmd cmd = {
3671                 .add_modify = STA_MODE_MODIFY,
3672                 .sta_id = mvmsta->sta_id,
3673                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3674                 .sleep_tx_count = cpu_to_le16(cnt),
3675                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3676         };
3677         int tid, ret;
3678         unsigned long _tids = tids;
3679 
3680         /* convert TIDs to ACs - we don't support TSPEC so that's OK
3681          * Note that this field is reserved and unused by firmware not
3682          * supporting GO uAPSD, so it's safe to always do this.
3683          */
3684         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3685                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3686 
3687         /* If we're releasing frames from aggregation or dqa queues then check
3688          * if all the queues that we're releasing frames from, combined, have:
3689          *  - more frames than the service period, in which case more_data
3690          *    needs to be set
3691          *  - fewer than 'cnt' frames, in which case we need to adjust the
3692          *    firmware command (but do that unconditionally)
3693          */
3694         if (single_sta_queue) {
3695                 int remaining = cnt;
3696                 int sleep_tx_count;
3697 
3698                 spin_lock_bh(&mvmsta->lock);
3699                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3700                         struct iwl_mvm_tid_data *tid_data;
3701                         u16 n_queued;
3702 
3703                         tid_data = &mvmsta->tid_data[tid];
3704 
3705                         n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3706                         if (n_queued > remaining) {
3707                                 more_data = true;
3708                                 remaining = 0;
3709                                 break;
3710                         }
3711                         remaining -= n_queued;
3712                 }
3713                 sleep_tx_count = cnt - remaining;
3714                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3715                         mvmsta->sleep_tx_count = sleep_tx_count;
3716                 spin_unlock_bh(&mvmsta->lock);
3717 
3718                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3719                 if (WARN_ON(cnt - remaining == 0)) {
3720                         ieee80211_sta_eosp(sta);
3721                         return;
3722                 }
3723         }
3724 
3725         /* Note: this is ignored by firmware not supporting GO uAPSD */
3726         if (more_data)
3727                 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3728 
3729         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3730                 mvmsta->next_status_eosp = true;
3731                 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3732         } else {
3733                 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3734         }
3735 
3736         /* block the Tx queues until the FW updated the sleep Tx count */
3737         iwl_trans_block_txq_ptrs(mvm->trans, true);
3738 
3739         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3740                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3741                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3742         if (ret)
3743                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3744 }
3745 
3746 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3747                            struct iwl_rx_cmd_buffer *rxb)
3748 {
3749         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3750         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3751         struct ieee80211_sta *sta;
3752         u32 sta_id = le32_to_cpu(notif->sta_id);
3753 
3754         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3755                 return;
3756 
3757         rcu_read_lock();
3758         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3759         if (!IS_ERR_OR_NULL(sta))
3760                 ieee80211_sta_eosp(sta);
3761         rcu_read_unlock();
3762 }
3763 
3764 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3765                                    struct iwl_mvm_sta *mvmsta, bool disable)
3766 {
3767         struct iwl_mvm_add_sta_cmd cmd = {
3768                 .add_modify = STA_MODE_MODIFY,
3769                 .sta_id = mvmsta->sta_id,
3770                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3771                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3772                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3773         };
3774         int ret;
3775 
3776         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3777                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3778         if (ret)
3779                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3780 }
3781 
3782 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3783                                       struct ieee80211_sta *sta,
3784                                       bool disable)
3785 {
3786         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3787 
3788         spin_lock_bh(&mvm_sta->lock);
3789 
3790         if (mvm_sta->disable_tx == disable) {
3791                 spin_unlock_bh(&mvm_sta->lock);
3792                 return;
3793         }
3794 
3795         mvm_sta->disable_tx = disable;
3796 
3797         /* Tell mac80211 to start/stop queuing tx for this station */
3798         ieee80211_sta_block_awake(mvm->hw, sta, disable);
3799 
3800         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3801 
3802         spin_unlock_bh(&mvm_sta->lock);
3803 }
3804 
3805 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3806                                               struct iwl_mvm_vif *mvmvif,
3807                                               struct iwl_mvm_int_sta *sta,
3808                                               bool disable)
3809 {
3810         u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3811         struct iwl_mvm_add_sta_cmd cmd = {
3812                 .add_modify = STA_MODE_MODIFY,
3813                 .sta_id = sta->sta_id,
3814                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3815                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3816                 .mac_id_n_color = cpu_to_le32(id),
3817         };
3818         int ret;
3819 
3820         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3821                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3822         if (ret)
3823                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3824 }
3825 
3826 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3827                                        struct iwl_mvm_vif *mvmvif,
3828                                        bool disable)
3829 {
3830         struct ieee80211_sta *sta;
3831         struct iwl_mvm_sta *mvm_sta;
3832         int i;
3833 
3834         lockdep_assert_held(&mvm->mutex);
3835 
3836         /* Block/unblock all the stations of the given mvmvif */
3837         for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3838                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3839                                                 lockdep_is_held(&mvm->mutex));
3840                 if (IS_ERR_OR_NULL(sta))
3841                         continue;
3842 
3843                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3844                 if (mvm_sta->mac_id_n_color !=
3845                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3846                         continue;
3847 
3848                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3849         }
3850 
3851         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3852                 return;
3853 
3854         /* Need to block/unblock also multicast station */
3855         if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3856                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3857                                                   &mvmvif->mcast_sta, disable);
3858 
3859         /*
3860          * Only unblock the broadcast station (FW blocks it for immediate
3861          * quiet, not the driver)
3862          */
3863         if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3864                 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3865                                                   &mvmvif->bcast_sta, disable);
3866 }
3867 
3868 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3869 {
3870         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3871         struct iwl_mvm_sta *mvmsta;
3872 
3873         rcu_read_lock();
3874 
3875         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3876 
3877         if (!WARN_ON(!mvmsta))
3878                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3879 
3880         rcu_read_unlock();
3881 }
3882 
3883 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3884 {
3885         u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3886 
3887         /*
3888          * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3889          * to align the wrap around of ssn so we compare relevant values.
3890          */
3891         if (mvm->trans->trans_cfg->gen2)
3892                 sn &= 0xff;
3893 
3894         return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3895 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/wireless/intel/iwlwifi/mvm/sta.c

DEFINITIONS
