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

   1 /******************************************************************************
   2  *
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   8  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
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  10  * Copyright(c) 2016 Intel Deutschland GmbH
  11  *
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  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
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  30  *  Intel Linux Wireless <linuxwifi@intel.com>
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  34  *
  35  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 Intel Deutschland GmbH
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  52  *    from this software without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67 #include <net/mac80211.h>
  68
  69 #include "mvm.h"
  70 #include "sta.h"
  71 #include "rs.h"
  72
  73 /*
  74  * New version of ADD_STA_sta command added new fields at the end of the
  75  * structure, so sending the size of the relevant API's structure is enough to
  76  * support both API versions.
  77  */
  78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
  79 {
  80         return iwl_mvm_has_new_rx_api(mvm) ?
  81                 sizeof(struct iwl_mvm_add_sta_cmd) :
  82                 sizeof(struct iwl_mvm_add_sta_cmd_v7);
  83 }
  84
  85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
  86                                     enum nl80211_iftype iftype)
  87 {
  88         int sta_id;
  89         u32 reserved_ids = 0;
  90
  91         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
  92         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
  93
  94         lockdep_assert_held(&mvm->mutex);
  95
  96         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
  97         if (iftype != NL80211_IFTYPE_STATION)
  98                 reserved_ids = BIT(0);
  99
 100         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
 101         for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
 102                 if (BIT(sta_id) & reserved_ids)
 103                         continue;
 104
 105                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 106                                                lockdep_is_held(&mvm->mutex)))
 107                         return sta_id;
 108         }
 109         return IWL_MVM_STATION_COUNT;
 110 }
 111
 112 /* send station add/update command to firmware */
 113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 114                            bool update)
 115 {
 116         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 117         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
 118                 .sta_id = mvm_sta->sta_id,
 119                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
 120                 .add_modify = update ? 1 : 0,
 121                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
 122                                                  STA_FLG_MIMO_EN_MSK),
 123                 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
 124         };
 125         int ret;
 126         u32 status;
 127         u32 agg_size = 0, mpdu_dens = 0;
 128
 129         if (!update) {
 130                 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
 131                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
 132         }
 133
 134         switch (sta->bandwidth) {
 135         case IEEE80211_STA_RX_BW_160:
 136                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
 137                 /* fall through */
 138         case IEEE80211_STA_RX_BW_80:
 139                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
 140                 /* fall through */
 141         case IEEE80211_STA_RX_BW_40:
 142                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
 143                 /* fall through */
 144         case IEEE80211_STA_RX_BW_20:
 145                 if (sta->ht_cap.ht_supported)
 146                         add_sta_cmd.station_flags |=
 147                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
 148                 break;
 149         }
 150
 151         switch (sta->rx_nss) {
 152         case 1:
 153                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 154                 break;
 155         case 2:
 156                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
 157                 break;
 158         case 3 ... 8:
 159                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
 160                 break;
 161         }
 162
 163         switch (sta->smps_mode) {
 164         case IEEE80211_SMPS_AUTOMATIC:
 165         case IEEE80211_SMPS_NUM_MODES:
 166                 WARN_ON(1);
 167                 break;
 168         case IEEE80211_SMPS_STATIC:
 169                 /* override NSS */
 170                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
 171                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
 172                 break;
 173         case IEEE80211_SMPS_DYNAMIC:
 174                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
 175                 break;
 176         case IEEE80211_SMPS_OFF:
 177                 /* nothing */
 178                 break;
 179         }
 180
 181         if (sta->ht_cap.ht_supported) {
 182                 add_sta_cmd.station_flags_msk |=
 183                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
 184                                     STA_FLG_AGG_MPDU_DENS_MSK);
 185
 186                 mpdu_dens = sta->ht_cap.ampdu_density;
 187         }
 188
 189         if (sta->vht_cap.vht_supported) {
 190                 agg_size = sta->vht_cap.cap &
 191                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
 192                 agg_size >>=
 193                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
 194         } else if (sta->ht_cap.ht_supported) {
 195                 agg_size = sta->ht_cap.ampdu_factor;
 196         }
 197
 198         add_sta_cmd.station_flags |=
 199                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
 200         add_sta_cmd.station_flags |=
 201                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
 202
 203         status = ADD_STA_SUCCESS;
 204         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 205                                           iwl_mvm_add_sta_cmd_size(mvm),
 206                                           &add_sta_cmd, &status);
 207         if (ret)
 208                 return ret;
 209
 210         switch (status & IWL_ADD_STA_STATUS_MASK) {
 211         case ADD_STA_SUCCESS:
 212                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
 213                 break;
 214         default:
 215                 ret = -EIO;
 216                 IWL_ERR(mvm, "ADD_STA failed\n");
 217                 break;
 218         }
 219
 220         return ret;
 221 }
 222
 223 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
 224                                  struct ieee80211_sta *sta)
 225 {
 226         unsigned long used_hw_queues;
 227         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 228         unsigned int wdg_timeout =
 229                 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
 230         u32 ac;
 231
 232         lockdep_assert_held(&mvm->mutex);
 233
 234         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
 235
 236         /* Find available queues, and allocate them to the ACs */
 237         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 238                 u8 queue = find_first_zero_bit(&used_hw_queues,
 239                                                mvm->first_agg_queue);
 240
 241                 if (queue >= mvm->first_agg_queue) {
 242                         IWL_ERR(mvm, "Failed to allocate STA queue\n");
 243                         return -EBUSY;
 244                 }
 245
 246                 __set_bit(queue, &used_hw_queues);
 247                 mvmsta->hw_queue[ac] = queue;
 248         }
 249
 250         /* Found a place for all queues - enable them */
 251         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 252                 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
 253                                       mvmsta->hw_queue[ac],
 254                                       iwl_mvm_ac_to_tx_fifo[ac], 0,
 255                                       wdg_timeout);
 256                 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
 257         }
 258
 259         return 0;
 260 }
 261
 262 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
 263                                     struct ieee80211_sta *sta)
 264 {
 265         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 266         unsigned long sta_msk;
 267         int i;
 268
 269         lockdep_assert_held(&mvm->mutex);
 270
 271         /* disable the TDLS STA-specific queues */
 272         sta_msk = mvmsta->tfd_queue_msk;
 273         for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
 274                 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
 275 }
 276
 277 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
 278                     struct ieee80211_vif *vif,
 279                     struct ieee80211_sta *sta)
 280 {
 281         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 282         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 283         int i, ret, sta_id;
 284
 285         lockdep_assert_held(&mvm->mutex);
 286
 287         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 288                 sta_id = iwl_mvm_find_free_sta_id(mvm,
 289                                                   ieee80211_vif_type_p2p(vif));
 290         else
 291                 sta_id = mvm_sta->sta_id;
 292
 293         if (sta_id == IWL_MVM_STATION_COUNT)
 294                 return -ENOSPC;
 295
 296         spin_lock_init(&mvm_sta->lock);
 297
 298         mvm_sta->sta_id = sta_id;
 299         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
 300                                                       mvmvif->color);
 301         mvm_sta->vif = vif;
 302         mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 303         mvm_sta->tx_protection = 0;
 304         mvm_sta->tt_tx_protection = false;
 305
 306         /* HW restart, don't assume the memory has been zeroed */
 307         atomic_set(&mvm->pending_frames[sta_id], 0);
 308         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
 309         mvm_sta->tfd_queue_msk = 0;
 310
 311         /* allocate new queues for a TDLS station */
 312         if (sta->tdls) {
 313                 ret = iwl_mvm_tdls_sta_init(mvm, sta);
 314                 if (ret)
 315                         return ret;
 316         } else {
 317                 for (i = 0; i < IEEE80211_NUM_ACS; i++)
 318                         if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
 319                                 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
 320         }
 321
 322         /* for HW restart - reset everything but the sequence number */
 323         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 324                 u16 seq = mvm_sta->tid_data[i].seq_number;
 325                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
 326                 mvm_sta->tid_data[i].seq_number = seq;
 327         }
 328         mvm_sta->agg_tids = 0;
 329
 330         ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
 331         if (ret)
 332                 goto err;
 333
 334         if (vif->type == NL80211_IFTYPE_STATION) {
 335                 if (!sta->tdls) {
 336                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
 337                         mvmvif->ap_sta_id = sta_id;
 338                 } else {
 339                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
 340                 }
 341         }
 342
 343         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
 344
 345         return 0;
 346
 347 err:
 348         iwl_mvm_tdls_sta_deinit(mvm, sta);
 349         return ret;
 350 }
 351
 352 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
 353                        struct ieee80211_vif *vif,
 354                        struct ieee80211_sta *sta)
 355 {
 356         return iwl_mvm_sta_send_to_fw(mvm, sta, true);
 357 }
 358
 359 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 360                       bool drain)
 361 {
 362         struct iwl_mvm_add_sta_cmd cmd = {};
 363         int ret;
 364         u32 status;
 365
 366         lockdep_assert_held(&mvm->mutex);
 367
 368         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 369         cmd.sta_id = mvmsta->sta_id;
 370         cmd.add_modify = STA_MODE_MODIFY;
 371         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
 372         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
 373
 374         status = ADD_STA_SUCCESS;
 375         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 376                                           iwl_mvm_add_sta_cmd_size(mvm),
 377                                           &cmd, &status);
 378         if (ret)
 379                 return ret;
 380
 381         switch (status & IWL_ADD_STA_STATUS_MASK) {
 382         case ADD_STA_SUCCESS:
 383                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
 384                                mvmsta->sta_id);
 385                 break;
 386         default:
 387                 ret = -EIO;
 388                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
 389                         mvmsta->sta_id);
 390                 break;
 391         }
 392
 393         return ret;
 394 }
 395
 396 /*
 397  * Remove a station from the FW table. Before sending the command to remove
 398  * the station validate that the station is indeed known to the driver (sanity
 399  * only).
 400  */
 401 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
 402 {
 403         struct ieee80211_sta *sta;
 404         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
 405                 .sta_id = sta_id,
 406         };
 407         int ret;
 408
 409         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 410                                         lockdep_is_held(&mvm->mutex));
 411
 412         /* Note: internal stations are marked as error values */
 413         if (!sta) {
 414                 IWL_ERR(mvm, "Invalid station id\n");
 415                 return -EINVAL;
 416         }
 417
 418         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
 419                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
 420         if (ret) {
 421                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
 422                 return ret;
 423         }
 424
 425         return 0;
 426 }
 427
 428 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
 429 {
 430         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
 431         u8 sta_id;
 432
 433         /*
 434          * The mutex is needed because of the SYNC cmd, but not only: if the
 435          * work would run concurrently with iwl_mvm_rm_sta, it would run before
 436          * iwl_mvm_rm_sta sets the station as busy, and exit. Then
 437          * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
 438          * that later.
 439          */
 440         mutex_lock(&mvm->mutex);
 441
 442         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
 443                 int ret;
 444                 struct ieee80211_sta *sta =
 445                         rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 446                                                   lockdep_is_held(&mvm->mutex));
 447
 448                 /*
 449                  * This station is in use or RCU-removed; the latter happens in
 450                  * managed mode, where mac80211 removes the station before we
 451                  * can remove it from firmware (we can only do that after the
 452                  * MAC is marked unassociated), and possibly while the deauth
 453                  * frame to disconnect from the AP is still queued. Then, the
 454                  * station pointer is -ENOENT when the last skb is reclaimed.
 455                  */
 456                 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
 457                         continue;
 458
 459                 if (PTR_ERR(sta) == -EINVAL) {
 460                         IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
 461                                 sta_id);
 462                         continue;
 463                 }
 464
 465                 if (!sta) {
 466                         IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
 467                                 sta_id);
 468                         continue;
 469                 }
 470
 471                 WARN_ON(PTR_ERR(sta) != -EBUSY);
 472                 /* This station was removed and we waited until it got drained,
 473                  * we can now proceed and remove it.
 474                  */
 475                 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
 476                 if (ret) {
 477                         IWL_ERR(mvm,
 478                                 "Couldn't remove sta %d after it was drained\n",
 479                                 sta_id);
 480                         continue;
 481                 }
 482                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 483                 clear_bit(sta_id, mvm->sta_drained);
 484
 485                 if (mvm->tfd_drained[sta_id]) {
 486                         unsigned long i, msk = mvm->tfd_drained[sta_id];
 487
 488                         for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
 489                                 iwl_mvm_disable_txq(mvm, i, i,
 490                                                     IWL_MAX_TID_COUNT, 0);
 491
 492                         mvm->tfd_drained[sta_id] = 0;
 493                         IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
 494                                        sta_id, msk);
 495                 }
 496         }
 497
 498         mutex_unlock(&mvm->mutex);
 499 }
 500
 501 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
 502                    struct ieee80211_vif *vif,
 503                    struct ieee80211_sta *sta)
 504 {
 505         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 506         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 507         int ret;
 508
 509         lockdep_assert_held(&mvm->mutex);
 510
 511         if (vif->type == NL80211_IFTYPE_STATION &&
 512             mvmvif->ap_sta_id == mvm_sta->sta_id) {
 513                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
 514                 if (ret)
 515                         return ret;
 516                 /* flush its queues here since we are freeing mvm_sta */
 517                 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
 518                 if (ret)
 519                         return ret;
 520                 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
 521                                                     mvm_sta->tfd_queue_msk);
 522                 if (ret)
 523                         return ret;
 524                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
 525
 526                 /* if we are associated - we can't remove the AP STA now */
 527                 if (vif->bss_conf.assoc)
 528                         return ret;
 529
 530                 /* unassoc - go ahead - remove the AP STA now */
 531                 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 532
 533                 /* clear d0i3_ap_sta_id if no longer relevant */
 534                 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
 535                         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 536         }
 537
 538         /*
 539          * This shouldn't happen - the TDLS channel switch should be canceled
 540          * before the STA is removed.
 541          */
 542         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
 543                 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
 544                 cancel_delayed_work(&mvm->tdls_cs.dwork);
 545         }
 546
 547         /*
 548          * Make sure that the tx response code sees the station as -EBUSY and
 549          * calls the drain worker.
 550          */
 551         spin_lock_bh(&mvm_sta->lock);
 552         /*
 553          * There are frames pending on the AC queues for this station.
 554          * We need to wait until all the frames are drained...
 555          */
 556         if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
 557                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
 558                                    ERR_PTR(-EBUSY));
 559                 spin_unlock_bh(&mvm_sta->lock);
 560
 561                 /* disable TDLS sta queues on drain complete */
 562                 if (sta->tdls) {
 563                         mvm->tfd_drained[mvm_sta->sta_id] =
 564                                                         mvm_sta->tfd_queue_msk;
 565                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
 566                                        mvm_sta->sta_id);
 567                 }
 568
 569                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
 570         } else {
 571                 spin_unlock_bh(&mvm_sta->lock);
 572
 573                 if (sta->tdls)
 574                         iwl_mvm_tdls_sta_deinit(mvm, sta);
 575
 576                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
 577                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
 578         }
 579
 580         return ret;
 581 }
 582
 583 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
 584                       struct ieee80211_vif *vif,
 585                       u8 sta_id)
 586 {
 587         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
 588
 589         lockdep_assert_held(&mvm->mutex);
 590
 591         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 592         return ret;
 593 }
 594
 595 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
 596                              struct iwl_mvm_int_sta *sta,
 597                              u32 qmask, enum nl80211_iftype iftype)
 598 {
 599         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 600                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
 601                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
 602                         return -ENOSPC;
 603         }
 604
 605         sta->tfd_queue_msk = qmask;
 606
 607         /* put a non-NULL value so iterating over the stations won't stop */
 608         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
 609         return 0;
 610 }
 611
 612 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
 613                                     struct iwl_mvm_int_sta *sta)
 614 {
 615         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
 616         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
 617         sta->sta_id = IWL_MVM_STATION_COUNT;
 618 }
 619
 620 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
 621                                       struct iwl_mvm_int_sta *sta,
 622                                       const u8 *addr,
 623                                       u16 mac_id, u16 color)
 624 {
 625         struct iwl_mvm_add_sta_cmd cmd;
 626         int ret;
 627         u32 status;
 628
 629         lockdep_assert_held(&mvm->mutex);
 630
 631         memset(&cmd, 0, sizeof(cmd));
 632         cmd.sta_id = sta->sta_id;
 633         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
 634                                                              color));
 635
 636         cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
 637         cmd.tid_disable_tx = cpu_to_le16(0xffff);
 638
 639         if (addr)
 640                 memcpy(cmd.addr, addr, ETH_ALEN);
 641
 642         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 643                                           iwl_mvm_add_sta_cmd_size(mvm),
 644                                           &cmd, &status);
 645         if (ret)
 646                 return ret;
 647
 648         switch (status & IWL_ADD_STA_STATUS_MASK) {
 649         case ADD_STA_SUCCESS:
 650                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
 651                 return 0;
 652         default:
 653                 ret = -EIO;
 654                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
 655                         status);
 656                 break;
 657         }
 658         return ret;
 659 }
 660
 661 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
 662 {
 663         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
 664                                         mvm->cfg->base_params->wd_timeout :
 665                                         IWL_WATCHDOG_DISABLED;
 666         int ret;
 667
 668         lockdep_assert_held(&mvm->mutex);
 669
 670         /* Map Aux queue to fifo - needs to happen before adding Aux station */
 671         iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
 672                               IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
 673
 674         /* Allocate aux station and assign to it the aux queue */
 675         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
 676                                        NL80211_IFTYPE_UNSPECIFIED);
 677         if (ret)
 678                 return ret;
 679
 680         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
 681                                          MAC_INDEX_AUX, 0);
 682
 683         if (ret)
 684                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 685         return ret;
 686 }
 687
 688 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 689 {
 690         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 691
 692         lockdep_assert_held(&mvm->mutex);
 693         return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
 694                                          mvmvif->id, 0);
 695 }
 696
 697 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 698 {
 699         int ret;
 700
 701         lockdep_assert_held(&mvm->mutex);
 702
 703         ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
 704         if (ret)
 705                 IWL_WARN(mvm, "Failed sending remove station\n");
 706
 707         return ret;
 708 }
 709
 710 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
 711 {
 712         iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
 713 }
 714
 715 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
 716 {
 717         lockdep_assert_held(&mvm->mutex);
 718
 719         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 720 }
 721
 722 /*
 723  * Send the add station command for the vif's broadcast station.
 724  * Assumes that the station was already allocated.
 725  *
 726  * @mvm: the mvm component
 727  * @vif: the interface to which the broadcast station is added
 728  * @bsta: the broadcast station to add.
 729  */
 730 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 731 {
 732         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 733         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
 734         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
 735         const u8 *baddr = _baddr;
 736
 737         lockdep_assert_held(&mvm->mutex);
 738
 739         if (vif->type == NL80211_IFTYPE_ADHOC)
 740                 baddr = vif->bss_conf.bssid;
 741
 742         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
 743                 return -ENOSPC;
 744
 745         return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
 746                                           mvmvif->id, mvmvif->color);
 747 }
 748
 749 /* Send the FW a request to remove the station from it's internal data
 750  * structures, but DO NOT remove the entry from the local data structures. */
 751 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 752 {
 753         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 754         int ret;
 755
 756         lockdep_assert_held(&mvm->mutex);
 757
 758         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
 759         if (ret)
 760                 IWL_WARN(mvm, "Failed sending remove station\n");
 761         return ret;
 762 }
 763
 764 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 765 {
 766         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 767         u32 qmask;
 768
 769         lockdep_assert_held(&mvm->mutex);
 770
 771         qmask = iwl_mvm_mac_get_queues_mask(vif);
 772
 773         /*
 774          * The firmware defines the TFD queue mask to only be relevant
 775          * for *unicast* queues, so the multicast (CAB) queue shouldn't
 776          * be included.
 777          */
 778         if (vif->type == NL80211_IFTYPE_AP)
 779                 qmask &= ~BIT(vif->cab_queue);
 780
 781         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
 782                                         ieee80211_vif_type_p2p(vif));
 783 }
 784
 785 /* Allocate a new station entry for the broadcast station to the given vif,
 786  * and send it to the FW.
 787  * Note that each P2P mac should have its own broadcast station.
 788  *
 789  * @mvm: the mvm component
 790  * @vif: the interface to which the broadcast station is added
 791  * @bsta: the broadcast station to add. */
 792 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 793 {
 794         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 795         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
 796         int ret;
 797
 798         lockdep_assert_held(&mvm->mutex);
 799
 800         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
 801         if (ret)
 802                 return ret;
 803
 804         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
 805
 806         if (ret)
 807                 iwl_mvm_dealloc_int_sta(mvm, bsta);
 808
 809         return ret;
 810 }
 811
 812 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 813 {
 814         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 815
 816         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 817 }
 818
 819 /*
 820  * Send the FW a request to remove the station from it's internal data
 821  * structures, and in addition remove it from the local data structure.
 822  */
 823 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 824 {
 825         int ret;
 826
 827         lockdep_assert_held(&mvm->mutex);
 828
 829         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
 830
 831         iwl_mvm_dealloc_bcast_sta(mvm, vif);
 832
 833         return ret;
 834 }
 835
 836 #define IWL_MAX_RX_BA_SESSIONS 16
 837
 838 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 839                        int tid, u16 ssn, bool start, u8 buf_size)
 840 {
 841         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 842         struct iwl_mvm_add_sta_cmd cmd = {};
 843         int ret;
 844         u32 status;
 845
 846         lockdep_assert_held(&mvm->mutex);
 847
 848         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
 849                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
 850                 return -ENOSPC;
 851         }
 852
 853         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
 854         cmd.sta_id = mvm_sta->sta_id;
 855         cmd.add_modify = STA_MODE_MODIFY;
 856         if (start) {
 857                 cmd.add_immediate_ba_tid = (u8) tid;
 858                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
 859                 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
 860         } else {
 861                 cmd.remove_immediate_ba_tid = (u8) tid;
 862         }
 863         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
 864                                   STA_MODIFY_REMOVE_BA_TID;
 865
 866         status = ADD_STA_SUCCESS;
 867         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 868                                           iwl_mvm_add_sta_cmd_size(mvm),
 869                                           &cmd, &status);
 870         if (ret)
 871                 return ret;
 872
 873         switch (status & IWL_ADD_STA_STATUS_MASK) {
 874         case ADD_STA_SUCCESS:
 875                 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
 876                                start ? "start" : "stopp");
 877                 break;
 878         case ADD_STA_IMMEDIATE_BA_FAILURE:
 879                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
 880                 ret = -ENOSPC;
 881                 break;
 882         default:
 883                 ret = -EIO;
 884                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
 885                         start ? "start" : "stopp", status);
 886                 break;
 887         }
 888
 889         if (!ret) {
 890                 if (start)
 891                         mvm->rx_ba_sessions++;
 892                 else if (mvm->rx_ba_sessions > 0)
 893                         /* check that restart flow didn't zero the counter */
 894                         mvm->rx_ba_sessions--;
 895         }
 896
 897         return ret;
 898 }
 899
 900 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 901                               int tid, u8 queue, bool start)
 902 {
 903         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
 904         struct iwl_mvm_add_sta_cmd cmd = {};
 905         int ret;
 906         u32 status;
 907
 908         lockdep_assert_held(&mvm->mutex);
 909
 910         if (start) {
 911                 mvm_sta->tfd_queue_msk |= BIT(queue);
 912                 mvm_sta->tid_disable_agg &= ~BIT(tid);
 913         } else {
 914                 mvm_sta->tfd_queue_msk &= ~BIT(queue);
 915                 mvm_sta->tid_disable_agg |= BIT(tid);
 916         }
 917
 918         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
 919         cmd.sta_id = mvm_sta->sta_id;
 920         cmd.add_modify = STA_MODE_MODIFY;
 921         cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
 922         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
 923         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
 924
 925         status = ADD_STA_SUCCESS;
 926         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
 927                                           iwl_mvm_add_sta_cmd_size(mvm),
 928                                           &cmd, &status);
 929         if (ret)
 930                 return ret;
 931
 932         switch (status & IWL_ADD_STA_STATUS_MASK) {
 933         case ADD_STA_SUCCESS:
 934                 break;
 935         default:
 936                 ret = -EIO;
 937                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
 938                         start ? "start" : "stopp", status);
 939                 break;
 940         }
 941
 942         return ret;
 943 }
 944
 945 const u8 tid_to_mac80211_ac[] = {
 946         IEEE80211_AC_BE,
 947         IEEE80211_AC_BK,
 948         IEEE80211_AC_BK,
 949         IEEE80211_AC_BE,
 950         IEEE80211_AC_VI,
 951         IEEE80211_AC_VI,
 952         IEEE80211_AC_VO,
 953         IEEE80211_AC_VO,
 954 };
 955
 956 static const u8 tid_to_ucode_ac[] = {
 957         AC_BE,
 958         AC_BK,
 959         AC_BK,
 960         AC_BE,
 961         AC_VI,
 962         AC_VI,
 963         AC_VO,
 964         AC_VO,
 965 };
 966
 967 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 968                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 969 {
 970         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 971         struct iwl_mvm_tid_data *tid_data;
 972         int txq_id;
 973         int ret;
 974
 975         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 976                 return -EINVAL;
 977
 978         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
 979                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
 980                         mvmsta->tid_data[tid].state);
 981                 return -ENXIO;
 982         }
 983
 984         lockdep_assert_held(&mvm->mutex);
 985
 986         spin_lock_bh(&mvmsta->lock);
 987
 988         /* possible race condition - we entered D0i3 while starting agg */
 989         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
 990                 spin_unlock_bh(&mvmsta->lock);
 991                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
 992                 return -EIO;
 993         }
 994
 995         spin_lock_bh(&mvm->queue_info_lock);
 996
 997         txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
 998                                          mvm->last_agg_queue);
 999         if (txq_id < 0) {
1000                 ret = txq_id;
1001                 spin_unlock_bh(&mvm->queue_info_lock);
1002                 IWL_ERR(mvm, "Failed to allocate agg queue\n");
1003                 goto release_locks;
1004         }
1005         mvm->queue_info[txq_id].setup_reserved = true;
1006         spin_unlock_bh(&mvm->queue_info_lock);
1007
1008         tid_data = &mvmsta->tid_data[tid];
1009         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1010         tid_data->txq_id = txq_id;
1011         *ssn = tid_data->ssn;
1012
1013         IWL_DEBUG_TX_QUEUES(mvm,
1014                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1015                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1016                             tid_data->next_reclaimed);
1017
1018         if (tid_data->ssn == tid_data->next_reclaimed) {
1019                 tid_data->state = IWL_AGG_STARTING;
1020                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1021         } else {
1022                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
1023         }
1024
1025         ret = 0;
1026
1027 release_locks:
1028         spin_unlock_bh(&mvmsta->lock);
1029
1030         return ret;
1031 }
1032
1033 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1034                             struct ieee80211_sta *sta, u16 tid, u8 buf_size)
1035 {
1036         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1037         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1038         unsigned int wdg_timeout =
1039                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1040         int queue, fifo, ret;
1041         u16 ssn;
1042
1043         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1044                      != IWL_MAX_TID_COUNT);
1045
1046         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1047
1048         spin_lock_bh(&mvmsta->lock);
1049         ssn = tid_data->ssn;
1050         queue = tid_data->txq_id;
1051         tid_data->state = IWL_AGG_ON;
1052         mvmsta->agg_tids |= BIT(tid);
1053         tid_data->ssn = 0xffff;
1054         spin_unlock_bh(&mvmsta->lock);
1055
1056         fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1057
1058         iwl_mvm_enable_agg_txq(mvm, queue,
1059                                vif->hw_queue[tid_to_mac80211_ac[tid]], fifo,
1060                                mvmsta->sta_id, tid, buf_size, ssn, wdg_timeout);
1061
1062         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1063         if (ret)
1064                 return -EIO;
1065
1066         /* No need to mark as reserved */
1067         spin_lock_bh(&mvm->queue_info_lock);
1068         mvm->queue_info[queue].setup_reserved = false;
1069         spin_unlock_bh(&mvm->queue_info_lock);
1070
1071         /*
1072          * Even though in theory the peer could have different
1073          * aggregation reorder buffer sizes for different sessions,
1074          * our ucode doesn't allow for that and has a global limit
1075          * for each station. Therefore, use the minimum of all the
1076          * aggregation sessions and our default value.
1077          */
1078         mvmsta->max_agg_bufsize =
1079                 min(mvmsta->max_agg_bufsize, buf_size);
1080         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1081
1082         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1083                      sta->addr, tid);
1084
1085         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1086 }
1087
1088 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1089                             struct ieee80211_sta *sta, u16 tid)
1090 {
1091         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1092         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1093         u16 txq_id;
1094         int err;
1095
1096
1097         /*
1098          * If mac80211 is cleaning its state, then say that we finished since
1099          * our state has been cleared anyway.
1100          */
1101         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1102                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1103                 return 0;
1104         }
1105
1106         spin_lock_bh(&mvmsta->lock);
1107
1108         txq_id = tid_data->txq_id;
1109
1110         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1111                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1112
1113         mvmsta->agg_tids &= ~BIT(tid);
1114
1115         /* No need to mark as reserved anymore */
1116         spin_lock_bh(&mvm->queue_info_lock);
1117         mvm->queue_info[txq_id].setup_reserved = false;
1118         spin_unlock_bh(&mvm->queue_info_lock);
1119
1120         switch (tid_data->state) {
1121         case IWL_AGG_ON:
1122                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1123
1124                 IWL_DEBUG_TX_QUEUES(mvm,
1125                                     "ssn = %d, next_recl = %d\n",
1126                                     tid_data->ssn, tid_data->next_reclaimed);
1127
1128                 /* There are still packets for this RA / TID in the HW */
1129                 if (tid_data->ssn != tid_data->next_reclaimed) {
1130                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1131                         err = 0;
1132                         break;
1133                 }
1134
1135                 tid_data->ssn = 0xffff;
1136                 tid_data->state = IWL_AGG_OFF;
1137                 spin_unlock_bh(&mvmsta->lock);
1138
1139                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1140
1141                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1142
1143                 iwl_mvm_disable_txq(mvm, txq_id,
1144                                     vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1145                                     0);
1146                 return 0;
1147         case IWL_AGG_STARTING:
1148         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1149                 /*
1150                  * The agg session has been stopped before it was set up. This
1151                  * can happen when the AddBA timer times out for example.
1152                  */
1153
1154                 /* No barriers since we are under mutex */
1155                 lockdep_assert_held(&mvm->mutex);
1156
1157                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1158                 tid_data->state = IWL_AGG_OFF;
1159                 err = 0;
1160                 break;
1161         default:
1162                 IWL_ERR(mvm,
1163                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1164                         mvmsta->sta_id, tid, tid_data->state);
1165                 IWL_ERR(mvm,
1166                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1167                 err = -EINVAL;
1168         }
1169
1170         spin_unlock_bh(&mvmsta->lock);
1171
1172         return err;
1173 }
1174
1175 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1176                             struct ieee80211_sta *sta, u16 tid)
1177 {
1178         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1179         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1180         u16 txq_id;
1181         enum iwl_mvm_agg_state old_state;
1182
1183         /*
1184          * First set the agg state to OFF to avoid calling
1185          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1186          */
1187         spin_lock_bh(&mvmsta->lock);
1188         txq_id = tid_data->txq_id;
1189         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1190                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1191         old_state = tid_data->state;
1192         tid_data->state = IWL_AGG_OFF;
1193         mvmsta->agg_tids &= ~BIT(tid);
1194         spin_unlock_bh(&mvmsta->lock);
1195
1196         /* No need to mark as reserved */
1197         spin_lock_bh(&mvm->queue_info_lock);
1198         mvm->queue_info[txq_id].setup_reserved = false;
1199         spin_unlock_bh(&mvm->queue_info_lock);
1200
1201         if (old_state >= IWL_AGG_ON) {
1202                 iwl_mvm_drain_sta(mvm, mvmsta, true);
1203                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1204                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1205                 iwl_trans_wait_tx_queue_empty(mvm->trans,
1206                                               mvmsta->tfd_queue_msk);
1207                 iwl_mvm_drain_sta(mvm, mvmsta, false);
1208
1209                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1210
1211                 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1212                                     vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1213                                     0);
1214         }
1215
1216         return 0;
1217 }
1218
1219 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1220 {
1221         int i, max = -1, max_offs = -1;
1222
1223         lockdep_assert_held(&mvm->mutex);
1224
1225         /* Pick the unused key offset with the highest 'deleted'
1226          * counter. Every time a key is deleted, all the counters
1227          * are incremented and the one that was just deleted is
1228          * reset to zero. Thus, the highest counter is the one
1229          * that was deleted longest ago. Pick that one.
1230          */
1231         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1232                 if (test_bit(i, mvm->fw_key_table))
1233                         continue;
1234                 if (mvm->fw_key_deleted[i] > max) {
1235                         max = mvm->fw_key_deleted[i];
1236                         max_offs = i;
1237                 }
1238         }
1239
1240         if (max_offs < 0)
1241                 return STA_KEY_IDX_INVALID;
1242
1243         return max_offs;
1244 }
1245
1246 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
1247                                                struct ieee80211_vif *vif,
1248                                                struct ieee80211_sta *sta)
1249 {
1250         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1251
1252         if (sta)
1253                 return iwl_mvm_sta_from_mac80211(sta);
1254
1255         /*
1256          * The device expects GTKs for station interfaces to be
1257          * installed as GTKs for the AP station. If we have no
1258          * station ID, then use AP's station ID.
1259          */
1260         if (vif->type == NL80211_IFTYPE_STATION &&
1261             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1262                 u8 sta_id = mvmvif->ap_sta_id;
1263
1264                 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
1265                                             lockdep_is_held(&mvm->mutex));
1266                 /*
1267                  * It is possible that the 'sta' parameter is NULL,
1268                  * for example when a GTK is removed - the sta_id will then
1269                  * be the AP ID, and no station was passed by mac80211.
1270                  */
1271                 if (IS_ERR_OR_NULL(sta))
1272                         return NULL;
1273
1274                 return iwl_mvm_sta_from_mac80211(sta);
1275         }
1276
1277         return NULL;
1278 }
1279
1280 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1281                                 struct iwl_mvm_sta *mvm_sta,
1282                                 struct ieee80211_key_conf *keyconf, bool mcast,
1283                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1284                                 u8 key_offset)
1285 {
1286         struct iwl_mvm_add_sta_key_cmd cmd = {};
1287         __le16 key_flags;
1288         int ret;
1289         u32 status;
1290         u16 keyidx;
1291         int i;
1292         u8 sta_id = mvm_sta->sta_id;
1293
1294         keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1295                  STA_KEY_FLG_KEYID_MSK;
1296         key_flags = cpu_to_le16(keyidx);
1297         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1298
1299         switch (keyconf->cipher) {
1300         case WLAN_CIPHER_SUITE_TKIP:
1301                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1302                 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1303                 for (i = 0; i < 5; i++)
1304                         cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1305                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1306                 break;
1307         case WLAN_CIPHER_SUITE_CCMP:
1308                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1309                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1310                 break;
1311         case WLAN_CIPHER_SUITE_WEP104:
1312                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1313                 /* fall through */
1314         case WLAN_CIPHER_SUITE_WEP40:
1315                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1316                 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1317                 break;
1318         default:
1319                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1320                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1321         }
1322
1323         if (mcast)
1324                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1325
1326         cmd.key_offset = key_offset;
1327         cmd.key_flags = key_flags;
1328         cmd.sta_id = sta_id;
1329
1330         status = ADD_STA_SUCCESS;
1331         if (cmd_flags & CMD_ASYNC)
1332                 ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1333                                             sizeof(cmd), &cmd);
1334         else
1335                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1336                                                   &cmd, &status);
1337
1338         switch (status) {
1339         case ADD_STA_SUCCESS:
1340                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1341                 break;
1342         default:
1343                 ret = -EIO;
1344                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1345                 break;
1346         }
1347
1348         return ret;
1349 }
1350
1351 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1352                                  struct ieee80211_key_conf *keyconf,
1353                                  u8 sta_id, bool remove_key)
1354 {
1355         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1356
1357         /* verify the key details match the required command's expectations */
1358         if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1359                     (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1360                     (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1361                 return -EINVAL;
1362
1363         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1364         igtk_cmd.sta_id = cpu_to_le32(sta_id);
1365
1366         if (remove_key) {
1367                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1368         } else {
1369                 struct ieee80211_key_seq seq;
1370                 const u8 *pn;
1371
1372                 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1373                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1374                 pn = seq.aes_cmac.pn;
1375                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1376                                                        ((u64) pn[4] << 8) |
1377                                                        ((u64) pn[3] << 16) |
1378                                                        ((u64) pn[2] << 24) |
1379                                                        ((u64) pn[1] << 32) |
1380                                                        ((u64) pn[0] << 40));
1381         }
1382
1383         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1384                        remove_key ? "removing" : "installing",
1385                        igtk_cmd.sta_id);
1386
1387         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1388                                     sizeof(igtk_cmd), &igtk_cmd);
1389 }
1390
1391
1392 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1393                                        struct ieee80211_vif *vif,
1394                                        struct ieee80211_sta *sta)
1395 {
1396         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1397
1398         if (sta)
1399                 return sta->addr;
1400
1401         if (vif->type == NL80211_IFTYPE_STATION &&
1402             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1403                 u8 sta_id = mvmvif->ap_sta_id;
1404                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1405                                                 lockdep_is_held(&mvm->mutex));
1406                 return sta->addr;
1407         }
1408
1409
1410         return NULL;
1411 }
1412
1413 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1414                                  struct ieee80211_vif *vif,
1415                                  struct ieee80211_sta *sta,
1416                                  struct ieee80211_key_conf *keyconf,
1417                                  u8 key_offset,
1418                                  bool mcast)
1419 {
1420         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1421         int ret;
1422         const u8 *addr;
1423         struct ieee80211_key_seq seq;
1424         u16 p1k[5];
1425
1426         switch (keyconf->cipher) {
1427         case WLAN_CIPHER_SUITE_TKIP:
1428                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1429                 /* get phase 1 key from mac80211 */
1430                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1431                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1432                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1433                                            seq.tkip.iv32, p1k, 0, key_offset);
1434                 break;
1435         case WLAN_CIPHER_SUITE_CCMP:
1436         case WLAN_CIPHER_SUITE_WEP40:
1437         case WLAN_CIPHER_SUITE_WEP104:
1438                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1439                                            0, NULL, 0, key_offset);
1440                 break;
1441         default:
1442                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1443                                            0, NULL, 0, key_offset);
1444         }
1445
1446         return ret;
1447 }
1448
1449 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
1450                                     struct ieee80211_key_conf *keyconf,
1451                                     bool mcast)
1452 {
1453         struct iwl_mvm_add_sta_key_cmd cmd = {};
1454         __le16 key_flags;
1455         int ret;
1456         u32 status;
1457
1458         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1459                                  STA_KEY_FLG_KEYID_MSK);
1460         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1461         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1462
1463         if (mcast)
1464                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1465
1466         cmd.key_flags = key_flags;
1467         cmd.key_offset = keyconf->hw_key_idx;
1468         cmd.sta_id = sta_id;
1469
1470         status = ADD_STA_SUCCESS;
1471         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1472                                           &cmd, &status);
1473
1474         switch (status) {
1475         case ADD_STA_SUCCESS:
1476                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1477                 break;
1478         default:
1479                 ret = -EIO;
1480                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1481                 break;
1482         }
1483
1484         return ret;
1485 }
1486
1487 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1488                         struct ieee80211_vif *vif,
1489                         struct ieee80211_sta *sta,
1490                         struct ieee80211_key_conf *keyconf,
1491                         u8 key_offset)
1492 {
1493         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1494         struct iwl_mvm_sta *mvm_sta;
1495         u8 sta_id;
1496         int ret;
1497         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
1498
1499         lockdep_assert_held(&mvm->mutex);
1500
1501         /* Get the station id from the mvm local station table */
1502         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
1503         if (!mvm_sta) {
1504                 IWL_ERR(mvm, "Failed to find station\n");
1505                 return -EINVAL;
1506         }
1507         sta_id = mvm_sta->sta_id;
1508
1509         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1510                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1511                 goto end;
1512         }
1513
1514         /*
1515          * It is possible that the 'sta' parameter is NULL, and thus
1516          * there is a need to retrieve  the sta from the local station table.
1517          */
1518         if (!sta) {
1519                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1520                                                 lockdep_is_held(&mvm->mutex));
1521                 if (IS_ERR_OR_NULL(sta)) {
1522                         IWL_ERR(mvm, "Invalid station id\n");
1523                         return -EINVAL;
1524                 }
1525         }
1526
1527         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
1528                 return -EINVAL;
1529
1530         /* If the key_offset is not pre-assigned, we need to find a
1531          * new offset to use.  In normal cases, the offset is not
1532          * pre-assigned, but during HW_RESTART we want to reuse the
1533          * same indices, so we pass them when this function is called.
1534          *
1535          * In D3 entry, we need to hardcoded the indices (because the
1536          * firmware hardcodes the PTK offset to 0).  In this case, we
1537          * need to make sure we don't overwrite the hw_key_idx in the
1538          * keyconf structure, because otherwise we cannot configure
1539          * the original ones back when resuming.
1540          */
1541         if (key_offset == STA_KEY_IDX_INVALID) {
1542                 key_offset  = iwl_mvm_set_fw_key_idx(mvm);
1543                 if (key_offset == STA_KEY_IDX_INVALID)
1544                         return -ENOSPC;
1545                 keyconf->hw_key_idx = key_offset;
1546         }
1547
1548         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
1549         if (ret)
1550                 goto end;
1551
1552         /*
1553          * For WEP, the same key is used for multicast and unicast. Upload it
1554          * again, using the same key offset, and now pointing the other one
1555          * to the same key slot (offset).
1556          * If this fails, remove the original as well.
1557          */
1558         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1559             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
1560                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
1561                                             key_offset, !mcast);
1562                 if (ret) {
1563                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1564                         goto end;
1565                 }
1566         }
1567
1568         __set_bit(key_offset, mvm->fw_key_table);
1569
1570 end:
1571         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1572                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1573                       sta ? sta->addr : zero_addr, ret);
1574         return ret;
1575 }
1576
1577 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1578                            struct ieee80211_vif *vif,
1579                            struct ieee80211_sta *sta,
1580                            struct ieee80211_key_conf *keyconf)
1581 {
1582         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1583         struct iwl_mvm_sta *mvm_sta;
1584         u8 sta_id = IWL_MVM_STATION_COUNT;
1585         int ret, i;
1586
1587         lockdep_assert_held(&mvm->mutex);
1588
1589         /* Get the station from the mvm local station table */
1590         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
1591
1592         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1593                       keyconf->keyidx, sta_id);
1594
1595         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1596                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1597
1598         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
1599                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1600                         keyconf->hw_key_idx);
1601                 return -ENOENT;
1602         }
1603
1604         /* track which key was deleted last */
1605         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1606                 if (mvm->fw_key_deleted[i] < U8_MAX)
1607                         mvm->fw_key_deleted[i]++;
1608         }
1609         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
1610
1611         if (!mvm_sta) {
1612                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1613                 return 0;
1614         }
1615
1616         sta_id = mvm_sta->sta_id;
1617
1618         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1619         if (ret)
1620                 return ret;
1621
1622         /* delete WEP key twice to get rid of (now useless) offset */
1623         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1624             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
1625                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
1626
1627         return ret;
1628 }
1629
1630 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1631                              struct ieee80211_vif *vif,
1632                              struct ieee80211_key_conf *keyconf,
1633                              struct ieee80211_sta *sta, u32 iv32,
1634                              u16 *phase1key)
1635 {
1636         struct iwl_mvm_sta *mvm_sta;
1637         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1638
1639         rcu_read_lock();
1640
1641         mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
1642         if (WARN_ON_ONCE(!mvm_sta))
1643                 goto unlock;
1644         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1645                              iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
1646
1647  unlock:
1648         rcu_read_unlock();
1649 }
1650
1651 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1652                                 struct ieee80211_sta *sta)
1653 {
1654         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1655         struct iwl_mvm_add_sta_cmd cmd = {
1656                 .add_modify = STA_MODE_MODIFY,
1657                 .sta_id = mvmsta->sta_id,
1658                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1659                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1660         };
1661         int ret;
1662
1663         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1664                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1665         if (ret)
1666                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1667 }
1668
1669 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1670                                        struct ieee80211_sta *sta,
1671                                        enum ieee80211_frame_release_type reason,
1672                                        u16 cnt, u16 tids, bool more_data,
1673                                        bool agg)
1674 {
1675         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1676         struct iwl_mvm_add_sta_cmd cmd = {
1677                 .add_modify = STA_MODE_MODIFY,
1678                 .sta_id = mvmsta->sta_id,
1679                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1680                 .sleep_tx_count = cpu_to_le16(cnt),
1681                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1682         };
1683         int tid, ret;
1684         unsigned long _tids = tids;
1685
1686         /* convert TIDs to ACs - we don't support TSPEC so that's OK
1687          * Note that this field is reserved and unused by firmware not
1688          * supporting GO uAPSD, so it's safe to always do this.
1689          */
1690         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
1691                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
1692
1693         /* If we're releasing frames from aggregation queues then check if the
1694          * all queues combined that we're releasing frames from have
1695          *  - more frames than the service period, in which case more_data
1696          *    needs to be set
1697          *  - fewer than 'cnt' frames, in which case we need to adjust the
1698          *    firmware command (but do that unconditionally)
1699          */
1700         if (agg) {
1701                 int remaining = cnt;
1702                 int sleep_tx_count;
1703
1704                 spin_lock_bh(&mvmsta->lock);
1705                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
1706                         struct iwl_mvm_tid_data *tid_data;
1707                         u16 n_queued;
1708
1709                         tid_data = &mvmsta->tid_data[tid];
1710                         if (WARN(tid_data->state != IWL_AGG_ON &&
1711                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
1712                                  "TID %d state is %d\n",
1713                                  tid, tid_data->state)) {
1714                                 spin_unlock_bh(&mvmsta->lock);
1715                                 ieee80211_sta_eosp(sta);
1716                                 return;
1717                         }
1718
1719                         n_queued = iwl_mvm_tid_queued(tid_data);
1720                         if (n_queued > remaining) {
1721                                 more_data = true;
1722                                 remaining = 0;
1723                                 break;
1724                         }
1725                         remaining -= n_queued;
1726                 }
1727                 sleep_tx_count = cnt - remaining;
1728                 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
1729                         mvmsta->sleep_tx_count = sleep_tx_count;
1730                 spin_unlock_bh(&mvmsta->lock);
1731
1732                 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
1733                 if (WARN_ON(cnt - remaining == 0)) {
1734                         ieee80211_sta_eosp(sta);
1735                         return;
1736                 }
1737         }
1738
1739         /* Note: this is ignored by firmware not supporting GO uAPSD */
1740         if (more_data)
1741                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
1742
1743         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
1744                 mvmsta->next_status_eosp = true;
1745                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
1746         } else {
1747                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
1748         }
1749
1750         /* block the Tx queues until the FW updated the sleep Tx count */
1751         iwl_trans_block_txq_ptrs(mvm->trans, true);
1752
1753         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
1754                                    CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
1755                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1756         if (ret)
1757                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1758 }
1759
1760 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
1761                            struct iwl_rx_cmd_buffer *rxb)
1762 {
1763         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1764         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
1765         struct ieee80211_sta *sta;
1766         u32 sta_id = le32_to_cpu(notif->sta_id);
1767
1768         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
1769                 return;
1770
1771         rcu_read_lock();
1772         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1773         if (!IS_ERR_OR_NULL(sta))
1774                 ieee80211_sta_eosp(sta);
1775         rcu_read_unlock();
1776 }
1777
1778 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
1779                                    struct iwl_mvm_sta *mvmsta, bool disable)
1780 {
1781         struct iwl_mvm_add_sta_cmd cmd = {
1782                 .add_modify = STA_MODE_MODIFY,
1783                 .sta_id = mvmsta->sta_id,
1784                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
1785                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
1786                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1787         };
1788         int ret;
1789
1790         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1791                                    iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1792         if (ret)
1793                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1794 }
1795
1796 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
1797                                       struct ieee80211_sta *sta,
1798                                       bool disable)
1799 {
1800         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1801
1802         spin_lock_bh(&mvm_sta->lock);
1803
1804         if (mvm_sta->disable_tx == disable) {
1805                 spin_unlock_bh(&mvm_sta->lock);
1806                 return;
1807         }
1808
1809         mvm_sta->disable_tx = disable;
1810
1811         /*
1812          * Tell mac80211 to start/stop queuing tx for this station,
1813          * but don't stop queuing if there are still pending frames
1814          * for this station.
1815          */
1816         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
1817                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
1818
1819         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
1820
1821         spin_unlock_bh(&mvm_sta->lock);
1822 }
1823
1824 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
1825                                        struct iwl_mvm_vif *mvmvif,
1826                                        bool disable)
1827 {
1828         struct ieee80211_sta *sta;
1829         struct iwl_mvm_sta *mvm_sta;
1830         int i;
1831
1832         lockdep_assert_held(&mvm->mutex);
1833
1834         /* Block/unblock all the stations of the given mvmvif */
1835         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1836                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1837                                                 lockdep_is_held(&mvm->mutex));
1838                 if (IS_ERR_OR_NULL(sta))
1839                         continue;
1840
1841                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1842                 if (mvm_sta->mac_id_n_color !=
1843                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
1844                         continue;
1845
1846                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
1847         }
1848 }
1849
1850 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1851 {
1852         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1853         struct iwl_mvm_sta *mvmsta;
1854
1855         rcu_read_lock();
1856
1857         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
1858
1859         if (!WARN_ON(!mvmsta))
1860                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
1861
1862         rcu_read_unlock();
1863 }