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

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