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