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

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