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