drivers/net/wireless/iwlwifi/iwl-agn-rxon.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * Intel Linux Wireless <ilw@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include "iwl-dev.h"
  28 #include "iwl-agn.h"
  29 #include "iwl-sta.h"
  30 #include "iwl-core.h"
  31 #include "iwl-agn-calib.h"
  32 #include "iwl-helpers.h"
  33
  34 static int iwlagn_disable_bss(struct iwl_priv *priv,
  35                               struct iwl_rxon_context *ctx,
  36                               struct iwl_rxon_cmd *send)
  37 {
  38         __le32 old_filter = send->filter_flags;
  39         int ret;
  40
  41         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  42         ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
  43
  44         send->filter_flags = old_filter;
  45
  46         if (ret)
  47                 IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
  48
  49         return ret;
  50 }
  51
  52 static int iwlagn_disable_pan(struct iwl_priv *priv,
  53                               struct iwl_rxon_context *ctx,
  54                               struct iwl_rxon_cmd *send)
  55 {
  56         struct iwl_notification_wait disable_wait;
  57         __le32 old_filter = send->filter_flags;
  58         u8 old_dev_type = send->dev_type;
  59         int ret;
  60
  61         iwlagn_init_notification_wait(priv, &disable_wait,
  62                                       REPLY_WIPAN_DEACTIVATION_COMPLETE,
  63                                       NULL, NULL);
  64
  65         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  66         send->dev_type = RXON_DEV_TYPE_P2P;
  67         ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
  68
  69         send->filter_flags = old_filter;
  70         send->dev_type = old_dev_type;
  71
  72         if (ret) {
  73                 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
  74                 iwlagn_remove_notification(priv, &disable_wait);
  75         } else {
  76                 signed long wait_res;
  77
  78                 wait_res = iwlagn_wait_notification(priv, &disable_wait, HZ);
  79                 if (wait_res == 0) {
  80                         IWL_ERR(priv, "Timed out waiting for PAN disable\n");
  81                         ret = -EIO;
  82                 }
  83         }
  84
  85         return ret;
  86 }
  87
  88 static void iwlagn_update_qos(struct iwl_priv *priv,
  89                               struct iwl_rxon_context *ctx)
  90 {
  91         int ret;
  92
  93         if (!ctx->is_active)
  94                 return;
  95
  96         ctx->qos_data.def_qos_parm.qos_flags = 0;
  97
  98         if (ctx->qos_data.qos_active)
  99                 ctx->qos_data.def_qos_parm.qos_flags |=
 100                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 101
 102         if (ctx->ht.enabled)
 103                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 104
 105         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 106                       ctx->qos_data.qos_active,
 107                       ctx->qos_data.def_qos_parm.qos_flags);
 108
 109         ret = iwl_send_cmd_pdu(priv, ctx->qos_cmd,
 110                                sizeof(struct iwl_qosparam_cmd),
 111                                &ctx->qos_data.def_qos_parm);
 112         if (ret)
 113                 IWL_ERR(priv, "Failed to update QoS\n");
 114 }
 115
 116 static int iwlagn_update_beacon(struct iwl_priv *priv,
 117                                 struct ieee80211_vif *vif)
 118 {
 119         lockdep_assert_held(&priv->mutex);
 120
 121         dev_kfree_skb(priv->beacon_skb);
 122         priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
 123         if (!priv->beacon_skb)
 124                 return -ENOMEM;
 125         return iwlagn_send_beacon_cmd(priv);
 126 }
 127
 128 /**
 129  * iwlagn_commit_rxon - commit staging_rxon to hardware
 130  *
 131  * The RXON command in staging_rxon is committed to the hardware and
 132  * the active_rxon structure is updated with the new data.  This
 133  * function correctly transitions out of the RXON_ASSOC_MSK state if
 134  * a HW tune is required based on the RXON structure changes.
 135  */
 136 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 137 {
 138         /* cast away the const for active_rxon in this function */
 139         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 140         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
 141         bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
 142         int ret;
 143
 144         lockdep_assert_held(&priv->mutex);
 145
 146         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 147                 return -EINVAL;
 148
 149         if (!iwl_is_alive(priv))
 150                 return -EBUSY;
 151
 152         /* This function hardcodes a bunch of dual-mode assumptions */
 153         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 154
 155         if (!ctx->is_active)
 156                 return 0;
 157
 158         /* always get timestamp with Rx frame */
 159         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
 160
 161         if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
 162                 struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
 163
 164                 iwl_set_rxon_channel(priv, chan, ctx);
 165                 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
 166                 ctx->staging.filter_flags |=
 167                         RXON_FILTER_ASSOC_MSK |
 168                         RXON_FILTER_PROMISC_MSK |
 169                         RXON_FILTER_CTL2HOST_MSK;
 170                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 171                 new_assoc = true;
 172
 173                 if (memcmp(&ctx->staging, &ctx->active,
 174                            sizeof(ctx->staging)) == 0)
 175                         return 0;
 176         }
 177
 178         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
 179             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
 180                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 181         else
 182                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 183
 184         ret = iwl_check_rxon_cmd(priv, ctx);
 185         if (ret) {
 186                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
 187                 return -EINVAL;
 188         }
 189
 190         /*
 191          * receive commit_rxon request
 192          * abort any previous channel switch if still in process
 193          */
 194         if (priv->switch_rxon.switch_in_progress &&
 195             (priv->switch_rxon.channel != ctx->staging.channel)) {
 196                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 197                       le16_to_cpu(priv->switch_rxon.channel));
 198                 iwl_chswitch_done(priv, false);
 199         }
 200
 201         /*
 202          * If we don't need to send a full RXON, we can use
 203          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 204          * and other flags for the current radio configuration.
 205          */
 206         if (!iwl_full_rxon_required(priv, ctx)) {
 207                 ret = iwl_send_rxon_assoc(priv, ctx);
 208                 if (ret) {
 209                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 210                         return ret;
 211                 }
 212
 213                 memcpy(active, &ctx->staging, sizeof(*active));
 214                 iwl_print_rx_config_cmd(priv, ctx);
 215                 return 0;
 216         }
 217
 218         if (priv->cfg->ops->hcmd->set_pan_params) {
 219                 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
 220                 if (ret)
 221                         return ret;
 222         }
 223
 224         iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->mod_params->sw_crypto);
 225
 226         IWL_DEBUG_INFO(priv,
 227                        "Going to commit RXON\n"
 228                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
 229                        "  * channel = %d\n"
 230                        "  * bssid = %pM\n",
 231                        (new_assoc ? "" : "out"),
 232                        le16_to_cpu(ctx->staging.channel),
 233                        ctx->staging.bssid_addr);
 234
 235         /*
 236          * Always clear associated first, but with the correct config.
 237          * This is required as for example station addition for the
 238          * AP station must be done after the BSSID is set to correctly
 239          * set up filters in the device.
 240          */
 241         if ((old_assoc && new_assoc) || !new_assoc) {
 242                 if (ctx->ctxid == IWL_RXON_CTX_BSS)
 243                         ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 244                 else
 245                         ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 246                 if (ret)
 247                         return ret;
 248
 249                 memcpy(active, &ctx->staging, sizeof(*active));
 250
 251                 /*
 252                  * Un-assoc RXON clears the station table and WEP
 253                  * keys, so we have to restore those afterwards.
 254                  */
 255                 iwl_clear_ucode_stations(priv, ctx);
 256                 iwl_restore_stations(priv, ctx);
 257                 ret = iwl_restore_default_wep_keys(priv, ctx);
 258                 if (ret) {
 259                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 260                         return ret;
 261                 }
 262         }
 263
 264         /* RXON timing must be before associated RXON */
 265         ret = iwl_send_rxon_timing(priv, ctx);
 266         if (ret) {
 267                 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 268                 return ret;
 269         }
 270
 271         if (new_assoc) {
 272                 /* QoS info may be cleared by previous un-assoc RXON */
 273                 iwlagn_update_qos(priv, ctx);
 274
 275                 /*
 276                  * We'll run into this code path when beaconing is
 277                  * enabled, but then we also need to send the beacon
 278                  * to the device.
 279                  */
 280                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 281                         ret = iwlagn_update_beacon(priv, ctx->vif);
 282                         if (ret) {
 283                                 IWL_ERR(priv,
 284                                         "Error sending required beacon (%d)!\n",
 285                                         ret);
 286                                 return ret;
 287                         }
 288                 }
 289
 290                 priv->start_calib = 0;
 291                 /*
 292                  * Apply the new configuration.
 293                  *
 294                  * Associated RXON doesn't clear the station table in uCode,
 295                  * so we don't need to restore stations etc. after this.
 296                  */
 297                 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
 298                               sizeof(struct iwl_rxon_cmd), &ctx->staging);
 299                 if (ret) {
 300                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 301                         return ret;
 302                 }
 303                 memcpy(active, &ctx->staging, sizeof(*active));
 304
 305                 iwl_reprogram_ap_sta(priv, ctx);
 306
 307                 /* IBSS beacon needs to be sent after setting assoc */
 308                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 309                         if (iwlagn_update_beacon(priv, ctx->vif))
 310                                 IWL_ERR(priv, "Error sending IBSS beacon\n");
 311         }
 312
 313         iwl_print_rx_config_cmd(priv, ctx);
 314
 315         iwl_init_sensitivity(priv);
 316
 317         /*
 318          * If we issue a new RXON command which required a tune then we must
 319          * send a new TXPOWER command or we won't be able to Tx any frames.
 320          *
 321          * It's expected we set power here if channel is changing.
 322          */
 323         ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 324         if (ret) {
 325                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 326                 return ret;
 327         }
 328
 329         return 0;
 330 }
 331
 332 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
 333 {
 334         struct iwl_priv *priv = hw->priv;
 335         struct iwl_rxon_context *ctx;
 336         struct ieee80211_conf *conf = &hw->conf;
 337         struct ieee80211_channel *channel = conf->channel;
 338         const struct iwl_channel_info *ch_info;
 339         int ret = 0;
 340         bool ht_changed[NUM_IWL_RXON_CTX] = {};
 341
 342         IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
 343
 344         mutex_lock(&priv->mutex);
 345
 346         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
 347                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
 348                 goto out;
 349         }
 350
 351         if (!iwl_is_ready(priv)) {
 352                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 353                 goto out;
 354         }
 355
 356         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
 357                        IEEE80211_CONF_CHANGE_CHANNEL)) {
 358                 /* mac80211 uses static for non-HT which is what we want */
 359                 priv->current_ht_config.smps = conf->smps_mode;
 360
 361                 /*
 362                  * Recalculate chain counts.
 363                  *
 364                  * If monitor mode is enabled then mac80211 will
 365                  * set up the SM PS mode to OFF if an HT channel is
 366                  * configured.
 367                  */
 368                 if (priv->cfg->ops->hcmd->set_rxon_chain)
 369                         for_each_context(priv, ctx)
 370                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 371         }
 372
 373         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 374                 unsigned long flags;
 375
 376                 ch_info = iwl_get_channel_info(priv, channel->band,
 377                                                channel->hw_value);
 378                 if (!is_channel_valid(ch_info)) {
 379                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
 380                         ret = -EINVAL;
 381                         goto out;
 382                 }
 383
 384                 spin_lock_irqsave(&priv->lock, flags);
 385
 386                 for_each_context(priv, ctx) {
 387                         /* Configure HT40 channels */
 388                         if (ctx->ht.enabled != conf_is_ht(conf)) {
 389                                 ctx->ht.enabled = conf_is_ht(conf);
 390                                 ht_changed[ctx->ctxid] = true;
 391                         }
 392
 393                         if (ctx->ht.enabled) {
 394                                 if (conf_is_ht40_minus(conf)) {
 395                                         ctx->ht.extension_chan_offset =
 396                                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 397                                         ctx->ht.is_40mhz = true;
 398                                 } else if (conf_is_ht40_plus(conf)) {
 399                                         ctx->ht.extension_chan_offset =
 400                                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 401                                         ctx->ht.is_40mhz = true;
 402                                 } else {
 403                                         ctx->ht.extension_chan_offset =
 404                                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
 405                                         ctx->ht.is_40mhz = false;
 406                                 }
 407                         } else
 408                                 ctx->ht.is_40mhz = false;
 409
 410                         /*
 411                          * Default to no protection. Protection mode will
 412                          * later be set from BSS config in iwl_ht_conf
 413                          */
 414                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
 415
 416                         /* if we are switching from ht to 2.4 clear flags
 417                          * from any ht related info since 2.4 does not
 418                          * support ht */
 419                         if (le16_to_cpu(ctx->staging.channel) !=
 420                             channel->hw_value)
 421                                 ctx->staging.flags = 0;
 422
 423                         iwl_set_rxon_channel(priv, channel, ctx);
 424                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
 425
 426                         iwl_set_flags_for_band(priv, ctx, channel->band,
 427                                                ctx->vif);
 428                 }
 429
 430                 spin_unlock_irqrestore(&priv->lock, flags);
 431
 432                 iwl_update_bcast_stations(priv);
 433
 434                 /*
 435                  * The list of supported rates and rate mask can be different
 436                  * for each band; since the band may have changed, reset
 437                  * the rate mask to what mac80211 lists.
 438                  */
 439                 iwl_set_rate(priv);
 440         }
 441
 442         if (changed & (IEEE80211_CONF_CHANGE_PS |
 443                         IEEE80211_CONF_CHANGE_IDLE)) {
 444                 ret = iwl_power_update_mode(priv, false);
 445                 if (ret)
 446                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
 447         }
 448
 449         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 450                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
 451                         priv->tx_power_user_lmt, conf->power_level);
 452
 453                 iwl_set_tx_power(priv, conf->power_level, false);
 454         }
 455
 456         for_each_context(priv, ctx) {
 457                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 458                         continue;
 459                 iwlagn_commit_rxon(priv, ctx);
 460                 if (ht_changed[ctx->ctxid])
 461                         iwlagn_update_qos(priv, ctx);
 462         }
 463  out:
 464         mutex_unlock(&priv->mutex);
 465         return ret;
 466 }
 467
 468 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
 469                                        struct iwl_rxon_context *ctx,
 470                                        struct ieee80211_bss_conf *bss_conf)
 471 {
 472         struct ieee80211_vif *vif = ctx->vif;
 473         struct iwl_rxon_context *tmp;
 474         struct ieee80211_sta *sta;
 475         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 476         struct ieee80211_sta_ht_cap *ht_cap;
 477         bool need_multiple;
 478
 479         lockdep_assert_held(&priv->mutex);
 480
 481         switch (vif->type) {
 482         case NL80211_IFTYPE_STATION:
 483                 rcu_read_lock();
 484                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
 485                 if (!sta) {
 486                         /*
 487                          * If at all, this can only happen through a race
 488                          * when the AP disconnects us while we're still
 489                          * setting up the connection, in that case mac80211
 490                          * will soon tell us about that.
 491                          */
 492                         need_multiple = false;
 493                         rcu_read_unlock();
 494                         break;
 495                 }
 496
 497                 ht_cap = &sta->ht_cap;
 498
 499                 need_multiple = true;
 500
 501                 /*
 502                  * If the peer advertises no support for receiving 2 and 3
 503                  * stream MCS rates, it can't be transmitting them either.
 504                  */
 505                 if (ht_cap->mcs.rx_mask[1] == 0 &&
 506                     ht_cap->mcs.rx_mask[2] == 0) {
 507                         need_multiple = false;
 508                 } else if (!(ht_cap->mcs.tx_params &
 509                                                 IEEE80211_HT_MCS_TX_DEFINED)) {
 510                         /* If it can't TX MCS at all ... */
 511                         need_multiple = false;
 512                 } else if (ht_cap->mcs.tx_params &
 513                                                 IEEE80211_HT_MCS_TX_RX_DIFF) {
 514                         int maxstreams;
 515
 516                         /*
 517                          * But if it can receive them, it might still not
 518                          * be able to transmit them, which is what we need
 519                          * to check here -- so check the number of streams
 520                          * it advertises for TX (if different from RX).
 521                          */
 522
 523                         maxstreams = (ht_cap->mcs.tx_params &
 524                                  IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
 525                         maxstreams >>=
 526                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
 527                         maxstreams += 1;
 528
 529                         if (maxstreams <= 1)
 530                                 need_multiple = false;
 531                 }
 532
 533                 rcu_read_unlock();
 534                 break;
 535         case NL80211_IFTYPE_ADHOC:
 536                 /* currently */
 537                 need_multiple = false;
 538                 break;
 539         default:
 540                 /* only AP really */
 541                 need_multiple = true;
 542                 break;
 543         }
 544
 545         ctx->ht_need_multiple_chains = need_multiple;
 546
 547         if (!need_multiple) {
 548                 /* check all contexts */
 549                 for_each_context(priv, tmp) {
 550                         if (!tmp->vif)
 551                                 continue;
 552                         if (tmp->ht_need_multiple_chains) {
 553                                 need_multiple = true;
 554                                 break;
 555                         }
 556                 }
 557         }
 558
 559         ht_conf->single_chain_sufficient = !need_multiple;
 560 }
 561
 562 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
 563                              struct ieee80211_vif *vif,
 564                              struct ieee80211_bss_conf *bss_conf,
 565                              u32 changes)
 566 {
 567         struct iwl_priv *priv = hw->priv;
 568         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 569         int ret;
 570         bool force = false;
 571
 572         mutex_lock(&priv->mutex);
 573
 574         if (unlikely(!iwl_is_ready(priv))) {
 575                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 576                 mutex_unlock(&priv->mutex);
 577                 return;
 578         }
 579
 580         if (unlikely(!ctx->vif)) {
 581                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
 582                 mutex_unlock(&priv->mutex);
 583                 return;
 584         }
 585
 586         if (changes & BSS_CHANGED_BEACON_INT)
 587                 force = true;
 588
 589         if (changes & BSS_CHANGED_QOS) {
 590                 ctx->qos_data.qos_active = bss_conf->qos;
 591                 iwlagn_update_qos(priv, ctx);
 592         }
 593
 594         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
 595         if (vif->bss_conf.use_short_preamble)
 596                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 597         else
 598                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 599
 600         if (changes & BSS_CHANGED_ASSOC) {
 601                 if (bss_conf->assoc) {
 602                         priv->timestamp = bss_conf->timestamp;
 603                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 604                 } else {
 605                         /*
 606                          * If we disassociate while there are pending
 607                          * frames, just wake up the queues and let the
 608                          * frames "escape" ... This shouldn't really
 609                          * be happening to start with, but we should
 610                          * not get stuck in this case either since it
 611                          * can happen if userspace gets confused.
 612                          */
 613                         if (ctx->last_tx_rejected) {
 614                                 ctx->last_tx_rejected = false;
 615                                 iwl_wake_any_queue(priv, ctx);
 616                         }
 617                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 618                 }
 619         }
 620
 621         if (ctx->ht.enabled) {
 622                 ctx->ht.protection = bss_conf->ht_operation_mode &
 623                                         IEEE80211_HT_OP_MODE_PROTECTION;
 624                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
 625                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 626                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
 627                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
 628         }
 629
 630         if (priv->cfg->ops->hcmd->set_rxon_chain)
 631                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 632
 633         if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
 634                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
 635         else
 636                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
 637
 638         if (bss_conf->use_cts_prot)
 639                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
 640         else
 641                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
 642
 643         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
 644
 645         if (vif->type == NL80211_IFTYPE_AP ||
 646             vif->type == NL80211_IFTYPE_ADHOC) {
 647                 if (vif->bss_conf.enable_beacon) {
 648                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 649                         priv->beacon_ctx = ctx;
 650                 } else {
 651                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 652                         priv->beacon_ctx = NULL;
 653                 }
 654         }
 655
 656         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 657                 iwlagn_commit_rxon(priv, ctx);
 658
 659         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
 660                 /*
 661                  * The chain noise calibration will enable PM upon
 662                  * completion. If calibration has already been run
 663                  * then we need to enable power management here.
 664                  */
 665                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
 666                         iwl_power_update_mode(priv, false);
 667
 668                 /* Enable RX differential gain and sensitivity calibrations */
 669                 iwl_chain_noise_reset(priv);
 670                 priv->start_calib = 1;
 671         }
 672
 673         if (changes & BSS_CHANGED_IBSS) {
 674                 ret = iwlagn_manage_ibss_station(priv, vif,
 675                                                  bss_conf->ibss_joined);
 676                 if (ret)
 677                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
 678                                 bss_conf->ibss_joined ? "add" : "remove",
 679                                 bss_conf->bssid);
 680         }
 681
 682         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
 683             priv->beacon_ctx) {
 684                 if (iwlagn_update_beacon(priv, vif))
 685                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 686         }
 687
 688         mutex_unlock(&priv->mutex);
 689 }
 690
 691 void iwlagn_post_scan(struct iwl_priv *priv)
 692 {
 693         struct iwl_rxon_context *ctx;
 694
 695         /*
 696          * Since setting the RXON may have been deferred while
 697          * performing the scan, fire one off if needed
 698          */
 699         for_each_context(priv, ctx)
 700                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 701                         iwlagn_commit_rxon(priv, ctx);
 702
 703         if (priv->cfg->ops->hcmd->set_pan_params)
 704                 priv->cfg->ops->hcmd->set_pan_params(priv);
 705 }