linux/drivers/net/wireless/iwlwifi/mvm/sta.c
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   1/******************************************************************************
   2 *
   3 * This file is provided under a dual BSD/GPLv2 license.  When using or
   4 * redistributing this file, you may do so under either license.
   5 *
   6 * GPL LICENSE SUMMARY
   7 *
   8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of version 2 of the GNU General Public License as
  13 * published by the Free Software Foundation.
  14 *
  15 * This program is distributed in the hope that it will be useful, but
  16 * WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 * General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program; if not, write to the Free Software
  22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23 * USA
  24 *
  25 * The full GNU General Public License is included in this distribution
  26 * in the file called COPYING.
  27 *
  28 * Contact Information:
  29 *  Intel Linux Wireless <ilw@linux.intel.com>
  30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31 *
  32 * BSD LICENSE
  33 *
  34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36 * All rights reserved.
  37 *
  38 * Redistribution and use in source and binary forms, with or without
  39 * modification, are permitted provided that the following conditions
  40 * are met:
  41 *
  42 *  * Redistributions of source code must retain the above copyright
  43 *    notice, this list of conditions and the following disclaimer.
  44 *  * Redistributions in binary form must reproduce the above copyright
  45 *    notice, this list of conditions and the following disclaimer in
  46 *    the documentation and/or other materials provided with the
  47 *    distribution.
  48 *  * Neither the name Intel Corporation nor the names of its
  49 *    contributors may be used to endorse or promote products derived
  50 *    from this software without specific prior written permission.
  51 *
  52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  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
  56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  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
  71static 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 */
  99int 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 = (void *)sta->drv_priv;
 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
 207static 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        u32 ac;
 213
 214        lockdep_assert_held(&mvm->mutex);
 215
 216        used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
 217
 218        /* Find available queues, and allocate them to the ACs */
 219        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 220                u8 queue = find_first_zero_bit(&used_hw_queues,
 221                                               mvm->first_agg_queue);
 222
 223                if (queue >= mvm->first_agg_queue) {
 224                        IWL_ERR(mvm, "Failed to allocate STA queue\n");
 225                        return -EBUSY;
 226                }
 227
 228                __set_bit(queue, &used_hw_queues);
 229                mvmsta->hw_queue[ac] = queue;
 230        }
 231
 232        /* Found a place for all queues - enable them */
 233        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 234                iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
 235                                      iwl_mvm_ac_to_tx_fifo[ac]);
 236                mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
 237        }
 238
 239        return 0;
 240}
 241
 242static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
 243                                    struct ieee80211_sta *sta)
 244{
 245        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 246        unsigned long sta_msk;
 247        int i;
 248
 249        lockdep_assert_held(&mvm->mutex);
 250
 251        /* disable the TDLS STA-specific queues */
 252        sta_msk = mvmsta->tfd_queue_msk;
 253        for_each_set_bit(i, &sta_msk, sizeof(sta_msk))
 254                iwl_mvm_disable_txq(mvm, i);
 255}
 256
 257int iwl_mvm_add_sta(struct iwl_mvm *mvm,
 258                    struct ieee80211_vif *vif,
 259                    struct ieee80211_sta *sta)
 260{
 261        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 262        struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 263        int i, ret, sta_id;
 264
 265        lockdep_assert_held(&mvm->mutex);
 266
 267        if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 268                sta_id = iwl_mvm_find_free_sta_id(mvm,
 269                                                  ieee80211_vif_type_p2p(vif));
 270        else
 271                sta_id = mvm_sta->sta_id;
 272
 273        if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
 274                return -ENOSPC;
 275
 276        spin_lock_init(&mvm_sta->lock);
 277
 278        mvm_sta->sta_id = sta_id;
 279        mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
 280                                                      mvmvif->color);
 281        mvm_sta->vif = vif;
 282        mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 283        mvm_sta->tx_protection = 0;
 284        mvm_sta->tt_tx_protection = false;
 285
 286        /* HW restart, don't assume the memory has been zeroed */
 287        atomic_set(&mvm->pending_frames[sta_id], 0);
 288        mvm_sta->tid_disable_agg = 0;
 289        mvm_sta->tfd_queue_msk = 0;
 290
 291        /* allocate new queues for a TDLS station */
 292        if (sta->tdls) {
 293                ret = iwl_mvm_tdls_sta_init(mvm, sta);
 294                if (ret)
 295                        return ret;
 296        } else {
 297                for (i = 0; i < IEEE80211_NUM_ACS; i++)
 298                        if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
 299                                mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
 300        }
 301
 302        /* for HW restart - reset everything but the sequence number */
 303        for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 304                u16 seq = mvm_sta->tid_data[i].seq_number;
 305                memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
 306                mvm_sta->tid_data[i].seq_number = seq;
 307        }
 308        mvm_sta->agg_tids = 0;
 309
 310        ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
 311        if (ret)
 312                goto err;
 313
 314        if (vif->type == NL80211_IFTYPE_STATION) {
 315                if (!sta->tdls) {
 316                        WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
 317                        mvmvif->ap_sta_id = sta_id;
 318                } else {
 319                        WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
 320                }
 321        }
 322
 323        rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
 324
 325        return 0;
 326
 327err:
 328        iwl_mvm_tdls_sta_deinit(mvm, sta);
 329        return ret;
 330}
 331
 332int iwl_mvm_update_sta(struct iwl_mvm *mvm,
 333                       struct ieee80211_vif *vif,
 334                       struct ieee80211_sta *sta)
 335{
 336        return iwl_mvm_sta_send_to_fw(mvm, sta, true);
 337}
 338
 339int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 340                      bool drain)
 341{
 342        struct iwl_mvm_add_sta_cmd cmd = {};
 343        int ret;
 344        u32 status;
 345
 346        lockdep_assert_held(&mvm->mutex);
 347
 348        cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
 349        cmd.sta_id = mvmsta->sta_id;
 350        cmd.add_modify = STA_MODE_MODIFY;
 351        cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
 352        cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
 353
 354        status = ADD_STA_SUCCESS;
 355        ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
 356                                          &cmd, &status);
 357        if (ret)
 358                return ret;
 359
 360        switch (status) {
 361        case ADD_STA_SUCCESS:
 362                IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
 363                               mvmsta->sta_id);
 364                break;
 365        default:
 366                ret = -EIO;
 367                IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
 368                        mvmsta->sta_id);
 369                break;
 370        }
 371
 372        return ret;
 373}
 374
 375/*
 376 * Remove a station from the FW table. Before sending the command to remove
 377 * the station validate that the station is indeed known to the driver (sanity
 378 * only).
 379 */
 380static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
 381{
 382        struct ieee80211_sta *sta;
 383        struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
 384                .sta_id = sta_id,
 385        };
 386        int ret;
 387
 388        sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 389                                        lockdep_is_held(&mvm->mutex));
 390
 391        /* Note: internal stations are marked as error values */
 392        if (!sta) {
 393                IWL_ERR(mvm, "Invalid station id\n");
 394                return -EINVAL;
 395        }
 396
 397        ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
 398                                   sizeof(rm_sta_cmd), &rm_sta_cmd);
 399        if (ret) {
 400                IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
 401                return ret;
 402        }
 403
 404        return 0;
 405}
 406
 407void iwl_mvm_sta_drained_wk(struct work_struct *wk)
 408{
 409        struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
 410        u8 sta_id;
 411
 412        /*
 413         * The mutex is needed because of the SYNC cmd, but not only: if the
 414         * work would run concurrently with iwl_mvm_rm_sta, it would run before
 415         * iwl_mvm_rm_sta sets the station as busy, and exit. Then
 416         * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
 417         * that later.
 418         */
 419        mutex_lock(&mvm->mutex);
 420
 421        for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
 422                int ret;
 423                struct ieee80211_sta *sta =
 424                        rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
 425                                                  lockdep_is_held(&mvm->mutex));
 426
 427                /*
 428                 * This station is in use or RCU-removed; the latter happens in
 429                 * managed mode, where mac80211 removes the station before we
 430                 * can remove it from firmware (we can only do that after the
 431                 * MAC is marked unassociated), and possibly while the deauth
 432                 * frame to disconnect from the AP is still queued. Then, the
 433                 * station pointer is -ENOENT when the last skb is reclaimed.
 434                 */
 435                if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
 436                        continue;
 437
 438                if (PTR_ERR(sta) == -EINVAL) {
 439                        IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
 440                                sta_id);
 441                        continue;
 442                }
 443
 444                if (!sta) {
 445                        IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
 446                                sta_id);
 447                        continue;
 448                }
 449
 450                WARN_ON(PTR_ERR(sta) != -EBUSY);
 451                /* This station was removed and we waited until it got drained,
 452                 * we can now proceed and remove it.
 453                 */
 454                ret = iwl_mvm_rm_sta_common(mvm, sta_id);
 455                if (ret) {
 456                        IWL_ERR(mvm,
 457                                "Couldn't remove sta %d after it was drained\n",
 458                                sta_id);
 459                        continue;
 460                }
 461                RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 462                clear_bit(sta_id, mvm->sta_drained);
 463
 464                if (mvm->tfd_drained[sta_id]) {
 465                        unsigned long i, msk = mvm->tfd_drained[sta_id];
 466
 467                        for_each_set_bit(i, &msk, sizeof(msk))
 468                                iwl_mvm_disable_txq(mvm, i);
 469
 470                        mvm->tfd_drained[sta_id] = 0;
 471                        IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
 472                                       sta_id, msk);
 473                }
 474        }
 475
 476        mutex_unlock(&mvm->mutex);
 477}
 478
 479int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
 480                   struct ieee80211_vif *vif,
 481                   struct ieee80211_sta *sta)
 482{
 483        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 484        struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 485        int ret;
 486
 487        lockdep_assert_held(&mvm->mutex);
 488
 489        if (vif->type == NL80211_IFTYPE_STATION &&
 490            mvmvif->ap_sta_id == mvm_sta->sta_id) {
 491                /* flush its queues here since we are freeing mvm_sta */
 492                ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
 493
 494                /* if we are associated - we can't remove the AP STA now */
 495                if (vif->bss_conf.assoc)
 496                        return ret;
 497
 498                /* unassoc - go ahead - remove the AP STA now */
 499                mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 500
 501                /* clear d0i3_ap_sta_id if no longer relevant */
 502                if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
 503                        mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 504        }
 505
 506        /*
 507         * This shouldn't happen - the TDLS channel switch should be canceled
 508         * before the STA is removed.
 509         */
 510        if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
 511                mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
 512                cancel_delayed_work(&mvm->tdls_cs.dwork);
 513        }
 514
 515        /*
 516         * Make sure that the tx response code sees the station as -EBUSY and
 517         * calls the drain worker.
 518         */
 519        spin_lock_bh(&mvm_sta->lock);
 520        /*
 521         * There are frames pending on the AC queues for this station.
 522         * We need to wait until all the frames are drained...
 523         */
 524        if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
 525                rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
 526                                   ERR_PTR(-EBUSY));
 527                spin_unlock_bh(&mvm_sta->lock);
 528
 529                /* disable TDLS sta queues on drain complete */
 530                if (sta->tdls) {
 531                        mvm->tfd_drained[mvm_sta->sta_id] =
 532                                                        mvm_sta->tfd_queue_msk;
 533                        IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
 534                                       mvm_sta->sta_id);
 535                }
 536
 537                ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
 538        } else {
 539                spin_unlock_bh(&mvm_sta->lock);
 540
 541                if (sta->tdls)
 542                        iwl_mvm_tdls_sta_deinit(mvm, sta);
 543
 544                ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
 545                RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
 546        }
 547
 548        return ret;
 549}
 550
 551int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
 552                      struct ieee80211_vif *vif,
 553                      u8 sta_id)
 554{
 555        int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
 556
 557        lockdep_assert_held(&mvm->mutex);
 558
 559        RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 560        return ret;
 561}
 562
 563static int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
 564                                    struct iwl_mvm_int_sta *sta,
 565                                    u32 qmask, enum nl80211_iftype iftype)
 566{
 567        if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 568                sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
 569                if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
 570                        return -ENOSPC;
 571        }
 572
 573        sta->tfd_queue_msk = qmask;
 574
 575        /* put a non-NULL value so iterating over the stations won't stop */
 576        rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
 577        return 0;
 578}
 579
 580static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
 581                                    struct iwl_mvm_int_sta *sta)
 582{
 583        RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
 584        memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
 585        sta->sta_id = IWL_MVM_STATION_COUNT;
 586}
 587
 588static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
 589                                      struct iwl_mvm_int_sta *sta,
 590                                      const u8 *addr,
 591                                      u16 mac_id, u16 color)
 592{
 593        struct iwl_mvm_add_sta_cmd cmd;
 594        int ret;
 595        u32 status;
 596
 597        lockdep_assert_held(&mvm->mutex);
 598
 599        memset(&cmd, 0, sizeof(cmd));
 600        cmd.sta_id = sta->sta_id;
 601        cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
 602                                                             color));
 603
 604        cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
 605
 606        if (addr)
 607                memcpy(cmd.addr, addr, ETH_ALEN);
 608
 609        ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
 610                                          &cmd, &status);
 611        if (ret)
 612                return ret;
 613
 614        switch (status) {
 615        case ADD_STA_SUCCESS:
 616                IWL_DEBUG_INFO(mvm, "Internal station added.\n");
 617                return 0;
 618        default:
 619                ret = -EIO;
 620                IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
 621                        status);
 622                break;
 623        }
 624        return ret;
 625}
 626
 627int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
 628{
 629        int ret;
 630
 631        lockdep_assert_held(&mvm->mutex);
 632
 633        /* Map Aux queue to fifo - needs to happen before adding Aux station */
 634        iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue,
 635                              IWL_MVM_TX_FIFO_MCAST);
 636
 637        /* Allocate aux station and assign to it the aux queue */
 638        ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
 639                                       NL80211_IFTYPE_UNSPECIFIED);
 640        if (ret)
 641                return ret;
 642
 643        ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
 644                                         MAC_INDEX_AUX, 0);
 645
 646        if (ret)
 647                iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 648        return ret;
 649}
 650
 651void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
 652{
 653        lockdep_assert_held(&mvm->mutex);
 654
 655        iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 656}
 657
 658/*
 659 * Send the add station command for the vif's broadcast station.
 660 * Assumes that the station was already allocated.
 661 *
 662 * @mvm: the mvm component
 663 * @vif: the interface to which the broadcast station is added
 664 * @bsta: the broadcast station to add.
 665 */
 666int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 667{
 668        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 669        struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
 670        static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
 671        const u8 *baddr = _baddr;
 672
 673        lockdep_assert_held(&mvm->mutex);
 674
 675        if (vif->type == NL80211_IFTYPE_ADHOC)
 676                baddr = vif->bss_conf.bssid;
 677
 678        if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
 679                return -ENOSPC;
 680
 681        return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
 682                                          mvmvif->id, mvmvif->color);
 683}
 684
 685/* Send the FW a request to remove the station from it's internal data
 686 * structures, but DO NOT remove the entry from the local data structures. */
 687int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 688{
 689        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 690        int ret;
 691
 692        lockdep_assert_held(&mvm->mutex);
 693
 694        ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
 695        if (ret)
 696                IWL_WARN(mvm, "Failed sending remove station\n");
 697        return ret;
 698}
 699
 700int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 701{
 702        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 703        u32 qmask;
 704
 705        lockdep_assert_held(&mvm->mutex);
 706
 707        qmask = iwl_mvm_mac_get_queues_mask(vif);
 708
 709        /*
 710         * The firmware defines the TFD queue mask to only be relevant
 711         * for *unicast* queues, so the multicast (CAB) queue shouldn't
 712         * be included.
 713         */
 714        if (vif->type == NL80211_IFTYPE_AP)
 715                qmask &= ~BIT(vif->cab_queue);
 716
 717        return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
 718                                        ieee80211_vif_type_p2p(vif));
 719}
 720
 721/* Allocate a new station entry for the broadcast station to the given vif,
 722 * and send it to the FW.
 723 * Note that each P2P mac should have its own broadcast station.
 724 *
 725 * @mvm: the mvm component
 726 * @vif: the interface to which the broadcast station is added
 727 * @bsta: the broadcast station to add. */
 728int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 729{
 730        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 731        struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
 732        int ret;
 733
 734        lockdep_assert_held(&mvm->mutex);
 735
 736        ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
 737        if (ret)
 738                return ret;
 739
 740        ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
 741
 742        if (ret)
 743                iwl_mvm_dealloc_int_sta(mvm, bsta);
 744
 745        return ret;
 746}
 747
 748void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 749{
 750        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 751
 752        iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
 753}
 754
 755/*
 756 * Send the FW a request to remove the station from it's internal data
 757 * structures, and in addition remove it from the local data structure.
 758 */
 759int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 760{
 761        int ret;
 762
 763        lockdep_assert_held(&mvm->mutex);
 764
 765        ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
 766
 767        iwl_mvm_dealloc_bcast_sta(mvm, vif);
 768
 769        return ret;
 770}
 771
 772#define IWL_MAX_RX_BA_SESSIONS 16
 773
 774int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 775                       int tid, u16 ssn, bool start)
 776{
 777        struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 778        struct iwl_mvm_add_sta_cmd cmd = {};
 779        int ret;
 780        u32 status;
 781
 782        lockdep_assert_held(&mvm->mutex);
 783
 784        if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
 785                IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
 786                return -ENOSPC;
 787        }
 788
 789        cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
 790        cmd.sta_id = mvm_sta->sta_id;
 791        cmd.add_modify = STA_MODE_MODIFY;
 792        if (start) {
 793                cmd.add_immediate_ba_tid = (u8) tid;
 794                cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
 795        } else {
 796                cmd.remove_immediate_ba_tid = (u8) tid;
 797        }
 798        cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
 799                                  STA_MODIFY_REMOVE_BA_TID;
 800
 801        status = ADD_STA_SUCCESS;
 802        ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
 803                                          &cmd, &status);
 804        if (ret)
 805                return ret;
 806
 807        switch (status) {
 808        case ADD_STA_SUCCESS:
 809                IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
 810                               start ? "start" : "stopp");
 811                break;
 812        case ADD_STA_IMMEDIATE_BA_FAILURE:
 813                IWL_WARN(mvm, "RX BA Session refused by fw\n");
 814                ret = -ENOSPC;
 815                break;
 816        default:
 817                ret = -EIO;
 818                IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
 819                        start ? "start" : "stopp", status);
 820                break;
 821        }
 822
 823        if (!ret) {
 824                if (start)
 825                        mvm->rx_ba_sessions++;
 826                else if (mvm->rx_ba_sessions > 0)
 827                        /* check that restart flow didn't zero the counter */
 828                        mvm->rx_ba_sessions--;
 829        }
 830
 831        return ret;
 832}
 833
 834static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 835                              int tid, u8 queue, bool start)
 836{
 837        struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
 838        struct iwl_mvm_add_sta_cmd cmd = {};
 839        int ret;
 840        u32 status;
 841
 842        lockdep_assert_held(&mvm->mutex);
 843
 844        if (start) {
 845                mvm_sta->tfd_queue_msk |= BIT(queue);
 846                mvm_sta->tid_disable_agg &= ~BIT(tid);
 847        } else {
 848                mvm_sta->tfd_queue_msk &= ~BIT(queue);
 849                mvm_sta->tid_disable_agg |= BIT(tid);
 850        }
 851
 852        cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
 853        cmd.sta_id = mvm_sta->sta_id;
 854        cmd.add_modify = STA_MODE_MODIFY;
 855        cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
 856        cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
 857        cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
 858
 859        status = ADD_STA_SUCCESS;
 860        ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
 861                                          &cmd, &status);
 862        if (ret)
 863                return ret;
 864
 865        switch (status) {
 866        case ADD_STA_SUCCESS:
 867                break;
 868        default:
 869                ret = -EIO;
 870                IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
 871                        start ? "start" : "stopp", status);
 872                break;
 873        }
 874
 875        return ret;
 876}
 877
 878const u8 tid_to_mac80211_ac[] = {
 879        IEEE80211_AC_BE,
 880        IEEE80211_AC_BK,
 881        IEEE80211_AC_BK,
 882        IEEE80211_AC_BE,
 883        IEEE80211_AC_VI,
 884        IEEE80211_AC_VI,
 885        IEEE80211_AC_VO,
 886        IEEE80211_AC_VO,
 887};
 888
 889static const u8 tid_to_ucode_ac[] = {
 890        AC_BE,
 891        AC_BK,
 892        AC_BK,
 893        AC_BE,
 894        AC_VI,
 895        AC_VI,
 896        AC_VO,
 897        AC_VO,
 898};
 899
 900int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 901                             struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 902{
 903        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 904        struct iwl_mvm_tid_data *tid_data;
 905        int txq_id;
 906
 907        if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
 908                return -EINVAL;
 909
 910        if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
 911                IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
 912                        mvmsta->tid_data[tid].state);
 913                return -ENXIO;
 914        }
 915
 916        lockdep_assert_held(&mvm->mutex);
 917
 918        for (txq_id = mvm->first_agg_queue;
 919             txq_id <= mvm->last_agg_queue; txq_id++)
 920                if (mvm->queue_to_mac80211[txq_id] ==
 921                    IWL_INVALID_MAC80211_QUEUE)
 922                        break;
 923
 924        if (txq_id > mvm->last_agg_queue) {
 925                IWL_ERR(mvm, "Failed to allocate agg queue\n");
 926                return -EIO;
 927        }
 928
 929        spin_lock_bh(&mvmsta->lock);
 930
 931        /* possible race condition - we entered D0i3 while starting agg */
 932        if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
 933                spin_unlock_bh(&mvmsta->lock);
 934                IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
 935                return -EIO;
 936        }
 937
 938        /* the new tx queue is still connected to the same mac80211 queue */
 939        mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_mac80211_ac[tid]];
 940
 941        tid_data = &mvmsta->tid_data[tid];
 942        tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
 943        tid_data->txq_id = txq_id;
 944        *ssn = tid_data->ssn;
 945
 946        IWL_DEBUG_TX_QUEUES(mvm,
 947                            "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
 948                            mvmsta->sta_id, tid, txq_id, tid_data->ssn,
 949                            tid_data->next_reclaimed);
 950
 951        if (tid_data->ssn == tid_data->next_reclaimed) {
 952                tid_data->state = IWL_AGG_STARTING;
 953                ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 954        } else {
 955                tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
 956        }
 957
 958        spin_unlock_bh(&mvmsta->lock);
 959
 960        return 0;
 961}
 962
 963int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 964                            struct ieee80211_sta *sta, u16 tid, u8 buf_size)
 965{
 966        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 967        struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 968        int queue, fifo, ret;
 969        u16 ssn;
 970
 971        BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
 972                     != IWL_MAX_TID_COUNT);
 973
 974        buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 975
 976        spin_lock_bh(&mvmsta->lock);
 977        ssn = tid_data->ssn;
 978        queue = tid_data->txq_id;
 979        tid_data->state = IWL_AGG_ON;
 980        mvmsta->agg_tids |= BIT(tid);
 981        tid_data->ssn = 0xffff;
 982        spin_unlock_bh(&mvmsta->lock);
 983
 984        fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
 985
 986        ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
 987        if (ret)
 988                return -EIO;
 989
 990        iwl_mvm_enable_agg_txq(mvm, queue, fifo, mvmsta->sta_id, tid,
 991                               buf_size, ssn);
 992
 993        /*
 994         * Even though in theory the peer could have different
 995         * aggregation reorder buffer sizes for different sessions,
 996         * our ucode doesn't allow for that and has a global limit
 997         * for each station. Therefore, use the minimum of all the
 998         * aggregation sessions and our default value.
 999         */
1000        mvmsta->max_agg_bufsize =
1001                min(mvmsta->max_agg_bufsize, buf_size);
1002        mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1003
1004        IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1005                     sta->addr, tid);
1006
1007        return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1008}
1009
1010int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1011                            struct ieee80211_sta *sta, u16 tid)
1012{
1013        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1014        struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1015        u16 txq_id;
1016        int err;
1017
1018
1019        /*
1020         * If mac80211 is cleaning its state, then say that we finished since
1021         * our state has been cleared anyway.
1022         */
1023        if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1024                ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1025                return 0;
1026        }
1027
1028        spin_lock_bh(&mvmsta->lock);
1029
1030        txq_id = tid_data->txq_id;
1031
1032        IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1033                            mvmsta->sta_id, tid, txq_id, tid_data->state);
1034
1035        mvmsta->agg_tids &= ~BIT(tid);
1036
1037        switch (tid_data->state) {
1038        case IWL_AGG_ON:
1039                tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1040
1041                IWL_DEBUG_TX_QUEUES(mvm,
1042                                    "ssn = %d, next_recl = %d\n",
1043                                    tid_data->ssn, tid_data->next_reclaimed);
1044
1045                /* There are still packets for this RA / TID in the HW */
1046                if (tid_data->ssn != tid_data->next_reclaimed) {
1047                        tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1048                        err = 0;
1049                        break;
1050                }
1051
1052                tid_data->ssn = 0xffff;
1053                tid_data->state = IWL_AGG_OFF;
1054                mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
1055                spin_unlock_bh(&mvmsta->lock);
1056
1057                ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1058
1059                iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1060
1061                iwl_mvm_disable_txq(mvm, txq_id);
1062                return 0;
1063        case IWL_AGG_STARTING:
1064        case IWL_EMPTYING_HW_QUEUE_ADDBA:
1065                /*
1066                 * The agg session has been stopped before it was set up. This
1067                 * can happen when the AddBA timer times out for example.
1068                 */
1069
1070                /* No barriers since we are under mutex */
1071                lockdep_assert_held(&mvm->mutex);
1072                mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
1073
1074                ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1075                tid_data->state = IWL_AGG_OFF;
1076                err = 0;
1077                break;
1078        default:
1079                IWL_ERR(mvm,
1080                        "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1081                        mvmsta->sta_id, tid, tid_data->state);
1082                IWL_ERR(mvm,
1083                        "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1084                err = -EINVAL;
1085        }
1086
1087        spin_unlock_bh(&mvmsta->lock);
1088
1089        return err;
1090}
1091
1092int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1093                            struct ieee80211_sta *sta, u16 tid)
1094{
1095        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1096        struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1097        u16 txq_id;
1098        enum iwl_mvm_agg_state old_state;
1099
1100        /*
1101         * First set the agg state to OFF to avoid calling
1102         * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1103         */
1104        spin_lock_bh(&mvmsta->lock);
1105        txq_id = tid_data->txq_id;
1106        IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1107                            mvmsta->sta_id, tid, txq_id, tid_data->state);
1108        old_state = tid_data->state;
1109        tid_data->state = IWL_AGG_OFF;
1110        mvmsta->agg_tids &= ~BIT(tid);
1111        spin_unlock_bh(&mvmsta->lock);
1112
1113        if (old_state >= IWL_AGG_ON) {
1114                if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
1115                        IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1116
1117                iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1118
1119                iwl_mvm_disable_txq(mvm, tid_data->txq_id);
1120        }
1121
1122        mvm->queue_to_mac80211[tid_data->txq_id] =
1123                                IWL_INVALID_MAC80211_QUEUE;
1124
1125        return 0;
1126}
1127
1128static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1129{
1130        int i;
1131
1132        lockdep_assert_held(&mvm->mutex);
1133
1134        i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
1135
1136        if (i == STA_KEY_MAX_NUM)
1137                return STA_KEY_IDX_INVALID;
1138
1139        __set_bit(i, mvm->fw_key_table);
1140
1141        return i;
1142}
1143
1144static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
1145                                 struct ieee80211_sta *sta)
1146{
1147        struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1148
1149        if (sta) {
1150                struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1151
1152                return mvm_sta->sta_id;
1153        }
1154
1155        /*
1156         * The device expects GTKs for station interfaces to be
1157         * installed as GTKs for the AP station. If we have no
1158         * station ID, then use AP's station ID.
1159         */
1160        if (vif->type == NL80211_IFTYPE_STATION &&
1161            mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
1162                return mvmvif->ap_sta_id;
1163
1164        return IWL_MVM_STATION_COUNT;
1165}
1166
1167static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1168                                struct iwl_mvm_sta *mvm_sta,
1169                                struct ieee80211_key_conf *keyconf, bool mcast,
1170                                u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags)
1171{
1172        struct iwl_mvm_add_sta_key_cmd cmd = {};
1173        __le16 key_flags;
1174        int ret;
1175        u32 status;
1176        u16 keyidx;
1177        int i;
1178        u8 sta_id = mvm_sta->sta_id;
1179
1180        keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1181                 STA_KEY_FLG_KEYID_MSK;
1182        key_flags = cpu_to_le16(keyidx);
1183        key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1184
1185        switch (keyconf->cipher) {
1186        case WLAN_CIPHER_SUITE_TKIP:
1187                key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1188                cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1189                for (i = 0; i < 5; i++)
1190                        cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1191                memcpy(cmd.key, keyconf->key, keyconf->keylen);
1192                break;
1193        case WLAN_CIPHER_SUITE_CCMP:
1194                key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1195                memcpy(cmd.key, keyconf->key, keyconf->keylen);
1196                break;
1197        case WLAN_CIPHER_SUITE_WEP104:
1198                key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1199        case WLAN_CIPHER_SUITE_WEP40:
1200                key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1201                memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1202                break;
1203        default:
1204                key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1205                memcpy(cmd.key, keyconf->key, keyconf->keylen);
1206        }
1207
1208        if (mcast)
1209                key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1210
1211        cmd.key_offset = keyconf->hw_key_idx;
1212        cmd.key_flags = key_flags;
1213        cmd.sta_id = sta_id;
1214
1215        status = ADD_STA_SUCCESS;
1216        if (cmd_flags & CMD_ASYNC)
1217                ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1218                                            sizeof(cmd), &cmd);
1219        else
1220                ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1221                                                  &cmd, &status);
1222
1223        switch (status) {
1224        case ADD_STA_SUCCESS:
1225                IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1226                break;
1227        default:
1228                ret = -EIO;
1229                IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1230                break;
1231        }
1232
1233        return ret;
1234}
1235
1236static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1237                                 struct ieee80211_key_conf *keyconf,
1238                                 u8 sta_id, bool remove_key)
1239{
1240        struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1241
1242        /* verify the key details match the required command's expectations */
1243        if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1244                    (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1245                    (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1246                return -EINVAL;
1247
1248        igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1249        igtk_cmd.sta_id = cpu_to_le32(sta_id);
1250
1251        if (remove_key) {
1252                igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1253        } else {
1254                struct ieee80211_key_seq seq;
1255                const u8 *pn;
1256
1257                memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1258                ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1259                                                   igtk_cmd.K1, igtk_cmd.K2);
1260                ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1261                pn = seq.aes_cmac.pn;
1262                igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1263                                                       ((u64) pn[4] << 8) |
1264                                                       ((u64) pn[3] << 16) |
1265                                                       ((u64) pn[2] << 24) |
1266                                                       ((u64) pn[1] << 32) |
1267                                                       ((u64) pn[0] << 40));
1268        }
1269
1270        IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1271                       remove_key ? "removing" : "installing",
1272                       igtk_cmd.sta_id);
1273
1274        return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1275                                    sizeof(igtk_cmd), &igtk_cmd);
1276}
1277
1278
1279static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1280                                       struct ieee80211_vif *vif,
1281                                       struct ieee80211_sta *sta)
1282{
1283        struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1284
1285        if (sta)
1286                return sta->addr;
1287
1288        if (vif->type == NL80211_IFTYPE_STATION &&
1289            mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1290                u8 sta_id = mvmvif->ap_sta_id;
1291                sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1292                                                lockdep_is_held(&mvm->mutex));
1293                return sta->addr;
1294        }
1295
1296
1297        return NULL;
1298}
1299
1300static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1301                                 struct ieee80211_vif *vif,
1302                                 struct ieee80211_sta *sta,
1303                                 struct ieee80211_key_conf *keyconf,
1304                                 bool mcast)
1305{
1306        struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1307        int ret;
1308        const u8 *addr;
1309        struct ieee80211_key_seq seq;
1310        u16 p1k[5];
1311
1312        switch (keyconf->cipher) {
1313        case WLAN_CIPHER_SUITE_TKIP:
1314                addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1315                /* get phase 1 key from mac80211 */
1316                ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1317                ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1318                ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1319                                           seq.tkip.iv32, p1k, 0);
1320                break;
1321        case WLAN_CIPHER_SUITE_CCMP:
1322        case WLAN_CIPHER_SUITE_WEP40:
1323        case WLAN_CIPHER_SUITE_WEP104:
1324                ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1325                                           0, NULL, 0);
1326                break;
1327        default:
1328                ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1329                                           0, NULL, 0);
1330        }
1331
1332        return ret;
1333}
1334
1335static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
1336                                    struct ieee80211_key_conf *keyconf,
1337                                    bool mcast)
1338{
1339        struct iwl_mvm_add_sta_key_cmd cmd = {};
1340        __le16 key_flags;
1341        int ret;
1342        u32 status;
1343
1344        key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1345                                 STA_KEY_FLG_KEYID_MSK);
1346        key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1347        key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1348
1349        if (mcast)
1350                key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1351
1352        cmd.key_flags = key_flags;
1353        cmd.key_offset = keyconf->hw_key_idx;
1354        cmd.sta_id = sta_id;
1355
1356        status = ADD_STA_SUCCESS;
1357        ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1358                                          &cmd, &status);
1359
1360        switch (status) {
1361        case ADD_STA_SUCCESS:
1362                IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1363                break;
1364        default:
1365                ret = -EIO;
1366                IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1367                break;
1368        }
1369
1370        return ret;
1371}
1372
1373int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1374                        struct ieee80211_vif *vif,
1375                        struct ieee80211_sta *sta,
1376                        struct ieee80211_key_conf *keyconf,
1377                        bool have_key_offset)
1378{
1379        bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1380        u8 sta_id;
1381        int ret;
1382
1383        lockdep_assert_held(&mvm->mutex);
1384
1385        /* Get the station id from the mvm local station table */
1386        sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1387        if (sta_id == IWL_MVM_STATION_COUNT) {
1388                IWL_ERR(mvm, "Failed to find station id\n");
1389                return -EINVAL;
1390        }
1391
1392        if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1393                ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1394                goto end;
1395        }
1396
1397        /*
1398         * It is possible that the 'sta' parameter is NULL, and thus
1399         * there is a need to retrieve  the sta from the local station table.
1400         */
1401        if (!sta) {
1402                sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1403                                                lockdep_is_held(&mvm->mutex));
1404                if (IS_ERR_OR_NULL(sta)) {
1405                        IWL_ERR(mvm, "Invalid station id\n");
1406                        return -EINVAL;
1407                }
1408        }
1409
1410        if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
1411                return -EINVAL;
1412
1413        if (!have_key_offset) {
1414                /*
1415                 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1416                 * configure it there. As a result, this workaround exists to
1417                 * let the caller set the key offset (hw_key_idx), see d3.c.
1418                 */
1419                keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1420                if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1421                        return -ENOSPC;
1422        }
1423
1424        ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, mcast);
1425        if (ret) {
1426                __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1427                goto end;
1428        }
1429
1430        /*
1431         * For WEP, the same key is used for multicast and unicast. Upload it
1432         * again, using the same key offset, and now pointing the other one
1433         * to the same key slot (offset).
1434         * If this fails, remove the original as well.
1435         */
1436        if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1437            keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
1438                ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, !mcast);
1439                if (ret) {
1440                        __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1441                        __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1442                }
1443        }
1444
1445end:
1446        IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1447                      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1448                      sta->addr, ret);
1449        return ret;
1450}
1451
1452int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1453                           struct ieee80211_vif *vif,
1454                           struct ieee80211_sta *sta,
1455                           struct ieee80211_key_conf *keyconf)
1456{
1457        bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1458        u8 sta_id;
1459        int ret;
1460
1461        lockdep_assert_held(&mvm->mutex);
1462
1463        /* Get the station id from the mvm local station table */
1464        sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1465
1466        IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1467                      keyconf->keyidx, sta_id);
1468
1469        if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1470                return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1471
1472        if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
1473                IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1474                        keyconf->hw_key_idx);
1475                return -ENOENT;
1476        }
1477
1478        if (sta_id == IWL_MVM_STATION_COUNT) {
1479                IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1480                return 0;
1481        }
1482
1483        /*
1484         * It is possible that the 'sta' parameter is NULL, and thus
1485         * there is a need to retrieve the sta from the local station table,
1486         * for example when a GTK is removed (where the sta_id will then be
1487         * the AP ID, and no station was passed by mac80211.)
1488         */
1489        if (!sta) {
1490                sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1491                                                lockdep_is_held(&mvm->mutex));
1492                if (!sta) {
1493                        IWL_ERR(mvm, "Invalid station id\n");
1494                        return -EINVAL;
1495                }
1496        }
1497
1498        if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
1499                return -EINVAL;
1500
1501        ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1502        if (ret)
1503                return ret;
1504
1505        /* delete WEP key twice to get rid of (now useless) offset */
1506        if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1507            keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
1508                ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
1509
1510        return ret;
1511}
1512
1513void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1514                             struct ieee80211_vif *vif,
1515                             struct ieee80211_key_conf *keyconf,
1516                             struct ieee80211_sta *sta, u32 iv32,
1517                             u16 *phase1key)
1518{
1519        struct iwl_mvm_sta *mvm_sta;
1520        u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1521        bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1522
1523        if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1524                return;
1525
1526        rcu_read_lock();
1527
1528        if (!sta) {
1529                sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1530                if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1531                        rcu_read_unlock();
1532                        return;
1533                }
1534        }
1535
1536        mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1537        iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1538                             iv32, phase1key, CMD_ASYNC);
1539        rcu_read_unlock();
1540}
1541
1542void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1543                                struct ieee80211_sta *sta)
1544{
1545        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1546        struct iwl_mvm_add_sta_cmd cmd = {
1547                .add_modify = STA_MODE_MODIFY,
1548                .sta_id = mvmsta->sta_id,
1549                .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1550                .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1551        };
1552        int ret;
1553
1554        ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1555        if (ret)
1556                IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1557}
1558
1559void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1560                                       struct ieee80211_sta *sta,
1561                                       enum ieee80211_frame_release_type reason,
1562                                       u16 cnt, u16 tids, bool more_data,
1563                                       bool agg)
1564{
1565        struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1566        struct iwl_mvm_add_sta_cmd cmd = {
1567                .add_modify = STA_MODE_MODIFY,
1568                .sta_id = mvmsta->sta_id,
1569                .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1570                .sleep_tx_count = cpu_to_le16(cnt),
1571                .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1572        };
1573        int tid, ret;
1574        unsigned long _tids = tids;
1575
1576        /* convert TIDs to ACs - we don't support TSPEC so that's OK
1577         * Note that this field is reserved and unused by firmware not
1578         * supporting GO uAPSD, so it's safe to always do this.
1579         */
1580        for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
1581                cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
1582
1583        /* If we're releasing frames from aggregation queues then check if the
1584         * all queues combined that we're releasing frames from have
1585         *  - more frames than the service period, in which case more_data
1586         *    needs to be set
1587         *  - fewer than 'cnt' frames, in which case we need to adjust the
1588         *    firmware command (but do that unconditionally)
1589         */
1590        if (agg) {
1591                int remaining = cnt;
1592
1593                spin_lock_bh(&mvmsta->lock);
1594                for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
1595                        struct iwl_mvm_tid_data *tid_data;
1596                        u16 n_queued;
1597
1598                        tid_data = &mvmsta->tid_data[tid];
1599                        if (WARN(tid_data->state != IWL_AGG_ON &&
1600                                 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
1601                                 "TID %d state is %d\n",
1602                                 tid, tid_data->state)) {
1603                                spin_unlock_bh(&mvmsta->lock);
1604                                ieee80211_sta_eosp(sta);
1605                                return;
1606                        }
1607
1608                        n_queued = iwl_mvm_tid_queued(tid_data);
1609                        if (n_queued > remaining) {
1610                                more_data = true;
1611                                remaining = 0;
1612                                break;
1613                        }
1614                        remaining -= n_queued;
1615                }
1616                spin_unlock_bh(&mvmsta->lock);
1617
1618                cmd.sleep_tx_count = cpu_to_le16(cnt - remaining);
1619                if (WARN_ON(cnt - remaining == 0)) {
1620                        ieee80211_sta_eosp(sta);
1621                        return;
1622                }
1623        }
1624
1625        /* Note: this is ignored by firmware not supporting GO uAPSD */
1626        if (more_data)
1627                cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
1628
1629        if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
1630                mvmsta->next_status_eosp = true;
1631                cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
1632        } else {
1633                cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
1634        }
1635
1636        ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1637        if (ret)
1638                IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1639}
1640
1641int iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
1642                          struct iwl_rx_cmd_buffer *rxb,
1643                          struct iwl_device_cmd *cmd)
1644{
1645        struct iwl_rx_packet *pkt = rxb_addr(rxb);
1646        struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
1647        struct ieee80211_sta *sta;
1648        u32 sta_id = le32_to_cpu(notif->sta_id);
1649
1650        if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
1651                return 0;
1652
1653        rcu_read_lock();
1654        sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1655        if (!IS_ERR_OR_NULL(sta))
1656                ieee80211_sta_eosp(sta);
1657        rcu_read_unlock();
1658
1659        return 0;
1660}
1661
1662void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
1663                                   struct iwl_mvm_sta *mvmsta, bool disable)
1664{
1665        struct iwl_mvm_add_sta_cmd cmd = {
1666                .add_modify = STA_MODE_MODIFY,
1667                .sta_id = mvmsta->sta_id,
1668                .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
1669                .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
1670                .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1671        };
1672        int ret;
1673
1674        if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_DISABLE_STA_TX))
1675                return;
1676
1677        ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1678        if (ret)
1679                IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1680}
1681
1682void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
1683                                      struct ieee80211_sta *sta,
1684                                      bool disable)
1685{
1686        struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1687
1688        spin_lock_bh(&mvm_sta->lock);
1689
1690        if (mvm_sta->disable_tx == disable) {
1691                spin_unlock_bh(&mvm_sta->lock);
1692                return;
1693        }
1694
1695        mvm_sta->disable_tx = disable;
1696
1697        /*
1698         * Tell mac80211 to start/stop queueing tx for this station,
1699         * but don't stop queueing if there are still pending frames
1700         * for this station.
1701         */
1702        if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
1703                ieee80211_sta_block_awake(mvm->hw, sta, disable);
1704
1705        iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
1706
1707        spin_unlock_bh(&mvm_sta->lock);
1708}
1709
1710void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
1711                                       struct iwl_mvm_vif *mvmvif,
1712                                       bool disable)
1713{
1714        struct ieee80211_sta *sta;
1715        struct iwl_mvm_sta *mvm_sta;
1716        int i;
1717
1718        lockdep_assert_held(&mvm->mutex);
1719
1720        /* Block/unblock all the stations of the given mvmvif */
1721        for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1722                sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1723                                                lockdep_is_held(&mvm->mutex));
1724                if (IS_ERR_OR_NULL(sta))
1725                        continue;
1726
1727                mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1728                if (mvm_sta->mac_id_n_color !=
1729                    FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
1730                        continue;
1731
1732                iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
1733        }
1734}
1735
1736void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1737{
1738        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1739        struct iwl_mvm_sta *mvmsta;
1740
1741        rcu_read_lock();
1742
1743        mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
1744
1745        if (!WARN_ON(!mvmsta))
1746                iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
1747
1748        rcu_read_unlock();
1749}
1750