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