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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 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
  33 static int iwlagn_disable_bss(struct iwl_priv *priv,
  34                               struct iwl_rxon_context *ctx,
  35                               struct iwl_rxon_cmd *send)
  36 {
  37         __le32 old_filter = send->filter_flags;
  38         int ret;
  39
  40         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  41         ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
  42
  43         send->filter_flags = old_filter;
  44
  45         if (ret)
  46                 IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
  47
  48         return ret;
  49 }
  50
  51 static int iwlagn_disable_pan(struct iwl_priv *priv,
  52                               struct iwl_rxon_context *ctx,
  53                               struct iwl_rxon_cmd *send)
  54 {
  55         struct iwl_notification_wait disable_wait;
  56         __le32 old_filter = send->filter_flags;
  57         u8 old_dev_type = send->dev_type;
  58         int ret;
  59
  60         iwlagn_init_notification_wait(priv, &disable_wait, NULL,
  61                                       REPLY_WIPAN_DEACTIVATION_COMPLETE);
  62
  63         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  64         send->dev_type = RXON_DEV_TYPE_P2P;
  65         ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
  66
  67         send->filter_flags = old_filter;
  68         send->dev_type = old_dev_type;
  69
  70         if (ret) {
  71                 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
  72                 iwlagn_remove_notification(priv, &disable_wait);
  73         } else {
  74                 signed long wait_res;
  75
  76                 wait_res = iwlagn_wait_notification(priv, &disable_wait, HZ);
  77                 if (wait_res == 0) {
  78                         IWL_ERR(priv, "Timed out waiting for PAN disable\n");
  79                         ret = -EIO;
  80                 }
  81         }
  82
  83         return ret;
  84 }
  85
  86 static void iwlagn_update_qos(struct iwl_priv *priv,
  87                               struct iwl_rxon_context *ctx)
  88 {
  89         int ret;
  90
  91         if (!ctx->is_active)
  92                 return;
  93
  94         ctx->qos_data.def_qos_parm.qos_flags = 0;
  95
  96         if (ctx->qos_data.qos_active)
  97                 ctx->qos_data.def_qos_parm.qos_flags |=
  98                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
  99
 100         if (ctx->ht.enabled)
 101                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 102
 103         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 104                       ctx->qos_data.qos_active,
 105                       ctx->qos_data.def_qos_parm.qos_flags);
 106
 107         ret = iwl_send_cmd_pdu(priv, ctx->qos_cmd,
 108                                sizeof(struct iwl_qosparam_cmd),
 109                                &ctx->qos_data.def_qos_parm);
 110         if (ret)
 111                 IWL_ERR(priv, "Failed to update QoS\n");
 112 }
 113
 114 static int iwlagn_update_beacon(struct iwl_priv *priv,
 115                                 struct ieee80211_vif *vif)
 116 {
 117         lockdep_assert_held(&priv->mutex);
 118
 119         dev_kfree_skb(priv->beacon_skb);
 120         priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
 121         if (!priv->beacon_skb)
 122                 return -ENOMEM;
 123         return iwlagn_send_beacon_cmd(priv);
 124 }
 125
 126 /**
 127  * iwlagn_commit_rxon - commit staging_rxon to hardware
 128  *
 129  * The RXON command in staging_rxon is committed to the hardware and
 130  * the active_rxon structure is updated with the new data.  This
 131  * function correctly transitions out of the RXON_ASSOC_MSK state if
 132  * a HW tune is required based on the RXON structure changes.
 133  */
 134 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 135 {
 136         /* cast away the const for active_rxon in this function */
 137         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 138         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
 139         bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
 140         int ret;
 141
 142         lockdep_assert_held(&priv->mutex);
 143
 144         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 145                 return -EINVAL;
 146
 147         if (!iwl_is_alive(priv))
 148                 return -EBUSY;
 149
 150         /* This function hardcodes a bunch of dual-mode assumptions */
 151         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 152
 153         if (!ctx->is_active)
 154                 return 0;
 155
 156         /* always get timestamp with Rx frame */
 157         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
 158
 159         if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
 160                 struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
 161
 162                 iwl_set_rxon_channel(priv, chan, ctx);
 163                 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
 164                 ctx->staging.filter_flags |=
 165                         RXON_FILTER_ASSOC_MSK |
 166                         RXON_FILTER_PROMISC_MSK |
 167                         RXON_FILTER_CTL2HOST_MSK;
 168                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 169                 new_assoc = true;
 170
 171                 if (memcmp(&ctx->staging, &ctx->active,
 172                            sizeof(ctx->staging)) == 0)
 173                         return 0;
 174         }
 175
 176         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
 177             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
 178                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 179         else
 180                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 181
 182         ret = iwl_check_rxon_cmd(priv, ctx);
 183         if (ret) {
 184                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
 185                 return -EINVAL;
 186         }
 187
 188         /*
 189          * receive commit_rxon request
 190          * abort any previous channel switch if still in process
 191          */
 192         if (priv->switch_rxon.switch_in_progress &&
 193             (priv->switch_rxon.channel != ctx->staging.channel)) {
 194                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 195                       le16_to_cpu(priv->switch_rxon.channel));
 196                 iwl_chswitch_done(priv, false);
 197         }
 198
 199         /*
 200          * If we don't need to send a full RXON, we can use
 201          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 202          * and other flags for the current radio configuration.
 203          */
 204         if (!iwl_full_rxon_required(priv, ctx)) {
 205                 ret = iwl_send_rxon_assoc(priv, ctx);
 206                 if (ret) {
 207                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 208                         return ret;
 209                 }
 210
 211                 memcpy(active, &ctx->staging, sizeof(*active));
 212                 iwl_print_rx_config_cmd(priv, ctx);
 213                 return 0;
 214         }
 215
 216         if (priv->cfg->ops->hcmd->set_pan_params) {
 217                 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
 218                 if (ret)
 219                         return ret;
 220         }
 221
 222         iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->mod_params->sw_crypto);
 223
 224         IWL_DEBUG_INFO(priv,
 225                        "Going to commit RXON\n"
 226                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
 227                        "  * channel = %d\n"
 228                        "  * bssid = %pM\n",
 229                        (new_assoc ? "" : "out"),
 230                        le16_to_cpu(ctx->staging.channel),
 231                        ctx->staging.bssid_addr);
 232
 233         /*
 234          * Always clear associated first, but with the correct config.
 235          * This is required as for example station addition for the
 236          * AP station must be done after the BSSID is set to correctly
 237          * set up filters in the device.
 238          */
 239         if ((old_assoc && new_assoc) || !new_assoc) {
 240                 if (ctx->ctxid == IWL_RXON_CTX_BSS)
 241                         ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 242                 else
 243                         ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 244                 if (ret)
 245                         return ret;
 246
 247                 memcpy(active, &ctx->staging, sizeof(*active));
 248
 249                 /*
 250                  * Un-assoc RXON clears the station table and WEP
 251                  * keys, so we have to restore those afterwards.
 252                  */
 253                 iwl_clear_ucode_stations(priv, ctx);
 254                 iwl_restore_stations(priv, ctx);
 255                 ret = iwl_restore_default_wep_keys(priv, ctx);
 256                 if (ret) {
 257                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 258                         return ret;
 259                 }
 260         }
 261
 262         /* RXON timing must be before associated RXON */
 263         ret = iwl_send_rxon_timing(priv, ctx);
 264         if (ret) {
 265                 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 266                 return ret;
 267         }
 268
 269         if (new_assoc) {
 270                 /* QoS info may be cleared by previous un-assoc RXON */
 271                 iwlagn_update_qos(priv, ctx);
 272
 273                 /*
 274                  * We'll run into this code path when beaconing is
 275                  * enabled, but then we also need to send the beacon
 276                  * to the device.
 277                  */
 278                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 279                         ret = iwlagn_update_beacon(priv, ctx->vif);
 280                         if (ret) {
 281                                 IWL_ERR(priv,
 282                                         "Error sending required beacon (%d)!\n",
 283                                         ret);
 284                                 return ret;
 285                         }
 286                 }
 287
 288                 priv->start_calib = 0;
 289                 /*
 290                  * Apply the new configuration.
 291                  *
 292                  * Associated RXON doesn't clear the station table in uCode,
 293                  * so we don't need to restore stations etc. after this.
 294                  */
 295                 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
 296                               sizeof(struct iwl_rxon_cmd), &ctx->staging);
 297                 if (ret) {
 298                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 299                         return ret;
 300                 }
 301                 memcpy(active, &ctx->staging, sizeof(*active));
 302
 303                 iwl_reprogram_ap_sta(priv, ctx);
 304
 305                 /* IBSS beacon needs to be sent after setting assoc */
 306                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 307                         if (iwlagn_update_beacon(priv, ctx->vif))
 308                                 IWL_ERR(priv, "Error sending IBSS beacon\n");
 309         }
 310
 311         iwl_print_rx_config_cmd(priv, ctx);
 312
 313         iwl_init_sensitivity(priv);
 314
 315         /*
 316          * If we issue a new RXON command which required a tune then we must
 317          * send a new TXPOWER command or we won't be able to Tx any frames.
 318          *
 319          * It's expected we set power here if channel is changing.
 320          */
 321         ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 322         if (ret) {
 323                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 324                 return ret;
 325         }
 326
 327         return 0;
 328 }
 329
 330 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
 331 {
 332         struct iwl_priv *priv = hw->priv;
 333         struct iwl_rxon_context *ctx;
 334         struct ieee80211_conf *conf = &hw->conf;
 335         struct ieee80211_channel *channel = conf->channel;
 336         const struct iwl_channel_info *ch_info;
 337         int ret = 0;
 338
 339         IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
 340
 341         mutex_lock(&priv->mutex);
 342
 343         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
 344                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
 345                 goto out;
 346         }
 347
 348         if (!iwl_is_ready(priv)) {
 349                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 350                 goto out;
 351         }
 352
 353         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
 354                        IEEE80211_CONF_CHANGE_CHANNEL)) {
 355                 /* mac80211 uses static for non-HT which is what we want */
 356                 priv->current_ht_config.smps = conf->smps_mode;
 357
 358                 /*
 359                  * Recalculate chain counts.
 360                  *
 361                  * If monitor mode is enabled then mac80211 will
 362                  * set up the SM PS mode to OFF if an HT channel is
 363                  * configured.
 364                  */
 365                 if (priv->cfg->ops->hcmd->set_rxon_chain)
 366                         for_each_context(priv, ctx)
 367                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 368         }
 369
 370         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 371                 unsigned long flags;
 372
 373                 ch_info = iwl_get_channel_info(priv, channel->band,
 374                                                channel->hw_value);
 375                 if (!is_channel_valid(ch_info)) {
 376                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
 377                         ret = -EINVAL;
 378                         goto out;
 379                 }
 380
 381                 spin_lock_irqsave(&priv->lock, flags);
 382
 383                 for_each_context(priv, ctx) {
 384                         /* Configure HT40 channels */
 385                         if (ctx->ht.enabled != conf_is_ht(conf))
 386                                 ctx->ht.enabled = conf_is_ht(conf);
 387
 388                         if (ctx->ht.enabled) {
 389                                 if (conf_is_ht40_minus(conf)) {
 390                                         ctx->ht.extension_chan_offset =
 391                                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 392                                         ctx->ht.is_40mhz = true;
 393                                 } else if (conf_is_ht40_plus(conf)) {
 394                                         ctx->ht.extension_chan_offset =
 395                                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 396                                         ctx->ht.is_40mhz = true;
 397                                 } else {
 398                                         ctx->ht.extension_chan_offset =
 399                                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
 400                                         ctx->ht.is_40mhz = false;
 401                                 }
 402                         } else
 403                                 ctx->ht.is_40mhz = false;
 404
 405                         /*
 406                          * Default to no protection. Protection mode will
 407                          * later be set from BSS config in iwl_ht_conf
 408                          */
 409                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
 410
 411                         /* if we are switching from ht to 2.4 clear flags
 412                          * from any ht related info since 2.4 does not
 413                          * support ht */
 414                         if (le16_to_cpu(ctx->staging.channel) !=
 415                             channel->hw_value)
 416                                 ctx->staging.flags = 0;
 417
 418                         iwl_set_rxon_channel(priv, channel, ctx);
 419                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
 420
 421                         iwl_set_flags_for_band(priv, ctx, channel->band,
 422                                                ctx->vif);
 423                 }
 424
 425                 spin_unlock_irqrestore(&priv->lock, flags);
 426
 427                 iwl_update_bcast_stations(priv);
 428
 429                 /*
 430                  * The list of supported rates and rate mask can be different
 431                  * for each band; since the band may have changed, reset
 432                  * the rate mask to what mac80211 lists.
 433                  */
 434                 iwl_set_rate(priv);
 435         }
 436
 437         if (changed & (IEEE80211_CONF_CHANGE_PS |
 438                         IEEE80211_CONF_CHANGE_IDLE)) {
 439                 ret = iwl_power_update_mode(priv, false);
 440                 if (ret)
 441                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
 442         }
 443
 444         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 445                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
 446                         priv->tx_power_user_lmt, conf->power_level);
 447
 448                 iwl_set_tx_power(priv, conf->power_level, false);
 449         }
 450
 451         for_each_context(priv, ctx) {
 452                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 453                         continue;
 454                 iwlagn_commit_rxon(priv, ctx);
 455         }
 456  out:
 457         mutex_unlock(&priv->mutex);
 458         return ret;
 459 }
 460
 461 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
 462                                        struct iwl_rxon_context *ctx,
 463                                        struct ieee80211_bss_conf *bss_conf)
 464 {
 465         struct ieee80211_vif *vif = ctx->vif;
 466         struct iwl_rxon_context *tmp;
 467         struct ieee80211_sta *sta;
 468         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 469         struct ieee80211_sta_ht_cap *ht_cap;
 470         bool need_multiple;
 471
 472         lockdep_assert_held(&priv->mutex);
 473
 474         switch (vif->type) {
 475         case NL80211_IFTYPE_STATION:
 476                 rcu_read_lock();
 477                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
 478                 if (!sta) {
 479                         /*
 480                          * If at all, this can only happen through a race
 481                          * when the AP disconnects us while we're still
 482                          * setting up the connection, in that case mac80211
 483                          * will soon tell us about that.
 484                          */
 485                         need_multiple = false;
 486                         rcu_read_unlock();
 487                         break;
 488                 }
 489
 490                 ht_cap = &sta->ht_cap;
 491
 492                 need_multiple = true;
 493
 494                 /*
 495                  * If the peer advertises no support for receiving 2 and 3
 496                  * stream MCS rates, it can't be transmitting them either.
 497                  */
 498                 if (ht_cap->mcs.rx_mask[1] == 0 &&
 499                     ht_cap->mcs.rx_mask[2] == 0) {
 500                         need_multiple = false;
 501                 } else if (!(ht_cap->mcs.tx_params &
 502                                                 IEEE80211_HT_MCS_TX_DEFINED)) {
 503                         /* If it can't TX MCS at all ... */
 504                         need_multiple = false;
 505                 } else if (ht_cap->mcs.tx_params &
 506                                                 IEEE80211_HT_MCS_TX_RX_DIFF) {
 507                         int maxstreams;
 508
 509                         /*
 510                          * But if it can receive them, it might still not
 511                          * be able to transmit them, which is what we need
 512                          * to check here -- so check the number of streams
 513                          * it advertises for TX (if different from RX).
 514                          */
 515
 516                         maxstreams = (ht_cap->mcs.tx_params &
 517                                  IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
 518                         maxstreams >>=
 519                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
 520                         maxstreams += 1;
 521
 522                         if (maxstreams <= 1)
 523                                 need_multiple = false;
 524                 }
 525
 526                 rcu_read_unlock();
 527                 break;
 528         case NL80211_IFTYPE_ADHOC:
 529                 /* currently */
 530                 need_multiple = false;
 531                 break;
 532         default:
 533                 /* only AP really */
 534                 need_multiple = true;
 535                 break;
 536         }
 537
 538         ctx->ht_need_multiple_chains = need_multiple;
 539
 540         if (!need_multiple) {
 541                 /* check all contexts */
 542                 for_each_context(priv, tmp) {
 543                         if (!tmp->vif)
 544                                 continue;
 545                         if (tmp->ht_need_multiple_chains) {
 546                                 need_multiple = true;
 547                                 break;
 548                         }
 549                 }
 550         }
 551
 552         ht_conf->single_chain_sufficient = !need_multiple;
 553 }
 554
 555 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
 556                              struct ieee80211_vif *vif,
 557                              struct ieee80211_bss_conf *bss_conf,
 558                              u32 changes)
 559 {
 560         struct iwl_priv *priv = hw->priv;
 561         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 562         int ret;
 563         bool force = false;
 564
 565         mutex_lock(&priv->mutex);
 566
 567         if (unlikely(!iwl_is_ready(priv))) {
 568                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 569                 mutex_unlock(&priv->mutex);
 570                 return;
 571         }
 572
 573         if (unlikely(!ctx->vif)) {
 574                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
 575                 mutex_unlock(&priv->mutex);
 576                 return;
 577         }
 578
 579         if (changes & BSS_CHANGED_BEACON_INT)
 580                 force = true;
 581
 582         if (changes & BSS_CHANGED_QOS) {
 583                 ctx->qos_data.qos_active = bss_conf->qos;
 584                 iwlagn_update_qos(priv, ctx);
 585         }
 586
 587         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
 588         if (vif->bss_conf.use_short_preamble)
 589                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 590         else
 591                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 592
 593         if (changes & BSS_CHANGED_ASSOC) {
 594                 if (bss_conf->assoc) {
 595                         priv->timestamp = bss_conf->timestamp;
 596                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 597                 } else {
 598                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 599                 }
 600         }
 601
 602         if (ctx->ht.enabled) {
 603                 ctx->ht.protection = bss_conf->ht_operation_mode &
 604                                         IEEE80211_HT_OP_MODE_PROTECTION;
 605                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
 606                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 607                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
 608                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
 609         }
 610
 611         if (priv->cfg->ops->hcmd->set_rxon_chain)
 612                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 613
 614         if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
 615                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
 616         else
 617                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
 618
 619         if (bss_conf->use_cts_prot)
 620                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
 621         else
 622                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
 623
 624         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
 625
 626         if (vif->type == NL80211_IFTYPE_AP ||
 627             vif->type == NL80211_IFTYPE_ADHOC) {
 628                 if (vif->bss_conf.enable_beacon) {
 629                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 630                         priv->beacon_ctx = ctx;
 631                 } else {
 632                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 633                         priv->beacon_ctx = NULL;
 634                 }
 635         }
 636
 637         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 638                 iwlagn_commit_rxon(priv, ctx);
 639
 640         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
 641                 /*
 642                  * The chain noise calibration will enable PM upon
 643                  * completion. If calibration has already been run
 644                  * then we need to enable power management here.
 645                  */
 646                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
 647                         iwl_power_update_mode(priv, false);
 648
 649                 /* Enable RX differential gain and sensitivity calibrations */
 650                 iwl_chain_noise_reset(priv);
 651                 priv->start_calib = 1;
 652         }
 653
 654         if (changes & BSS_CHANGED_IBSS) {
 655                 ret = iwlagn_manage_ibss_station(priv, vif,
 656                                                  bss_conf->ibss_joined);
 657                 if (ret)
 658                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
 659                                 bss_conf->ibss_joined ? "add" : "remove",
 660                                 bss_conf->bssid);
 661         }
 662
 663         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
 664             priv->beacon_ctx) {
 665                 if (iwlagn_update_beacon(priv, vif))
 666                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 667         }
 668
 669         mutex_unlock(&priv->mutex);
 670 }
 671
 672 void iwlagn_post_scan(struct iwl_priv *priv)
 673 {
 674         struct iwl_rxon_context *ctx;
 675
 676         /*
 677          * Since setting the RXON may have been deferred while
 678          * performing the scan, fire one off if needed
 679          */
 680         for_each_context(priv, ctx)
 681                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 682                         iwlagn_commit_rxon(priv, ctx);
 683
 684         if (priv->cfg->ops->hcmd->set_pan_params)
 685                 priv->cfg->ops->hcmd->set_pan_params(priv);
 686 }