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 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
 125                            struct iwl_rxon_context *ctx)
 126 {
 127         int ret = 0;
 128         struct iwl5000_rxon_assoc_cmd rxon_assoc;
 129         const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
 130         const struct iwl_rxon_cmd *rxon2 = &ctx->active;
 131
 132         if ((rxon1->flags == rxon2->flags) &&
 133             (rxon1->filter_flags == rxon2->filter_flags) &&
 134             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 135             (rxon1->ofdm_ht_single_stream_basic_rates ==
 136              rxon2->ofdm_ht_single_stream_basic_rates) &&
 137             (rxon1->ofdm_ht_dual_stream_basic_rates ==
 138              rxon2->ofdm_ht_dual_stream_basic_rates) &&
 139             (rxon1->ofdm_ht_triple_stream_basic_rates ==
 140              rxon2->ofdm_ht_triple_stream_basic_rates) &&
 141             (rxon1->acquisition_data == rxon2->acquisition_data) &&
 142             (rxon1->rx_chain == rxon2->rx_chain) &&
 143             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 144                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
 145                 return 0;
 146         }
 147
 148         rxon_assoc.flags = ctx->staging.flags;
 149         rxon_assoc.filter_flags = ctx->staging.filter_flags;
 150         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
 151         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
 152         rxon_assoc.reserved1 = 0;
 153         rxon_assoc.reserved2 = 0;
 154         rxon_assoc.reserved3 = 0;
 155         rxon_assoc.ofdm_ht_single_stream_basic_rates =
 156             ctx->staging.ofdm_ht_single_stream_basic_rates;
 157         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 158             ctx->staging.ofdm_ht_dual_stream_basic_rates;
 159         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
 160         rxon_assoc.ofdm_ht_triple_stream_basic_rates =
 161                  ctx->staging.ofdm_ht_triple_stream_basic_rates;
 162         rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
 163
 164         ret = iwl_send_cmd_pdu_async(priv, ctx->rxon_assoc_cmd,
 165                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
 166         if (ret)
 167                 return ret;
 168
 169         return ret;
 170 }
 171
 172 /**
 173  * iwlagn_commit_rxon - commit staging_rxon to hardware
 174  *
 175  * The RXON command in staging_rxon is committed to the hardware and
 176  * the active_rxon structure is updated with the new data.  This
 177  * function correctly transitions out of the RXON_ASSOC_MSK state if
 178  * a HW tune is required based on the RXON structure changes.
 179  */
 180 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 181 {
 182         /* cast away the const for active_rxon in this function */
 183         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 184         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
 185         bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
 186         int ret;
 187
 188         lockdep_assert_held(&priv->mutex);
 189
 190         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 191                 return -EINVAL;
 192
 193         if (!iwl_is_alive(priv))
 194                 return -EBUSY;
 195
 196         /* This function hardcodes a bunch of dual-mode assumptions */
 197         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 198
 199         if (!ctx->is_active)
 200                 return 0;
 201
 202         /* always get timestamp with Rx frame */
 203         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
 204
 205         if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) {
 206                 struct ieee80211_channel *chan = priv->_agn.hw_roc_channel;
 207
 208                 iwl_set_rxon_channel(priv, chan, ctx);
 209                 iwl_set_flags_for_band(priv, ctx, chan->band, NULL);
 210                 ctx->staging.filter_flags |=
 211                         RXON_FILTER_ASSOC_MSK |
 212                         RXON_FILTER_PROMISC_MSK |
 213                         RXON_FILTER_CTL2HOST_MSK;
 214                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 215                 new_assoc = true;
 216
 217                 if (memcmp(&ctx->staging, &ctx->active,
 218                            sizeof(ctx->staging)) == 0)
 219                         return 0;
 220         }
 221
 222         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
 223             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
 224                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 225         else
 226                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 227
 228         ret = iwl_check_rxon_cmd(priv, ctx);
 229         if (ret) {
 230                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
 231                 return -EINVAL;
 232         }
 233
 234         /*
 235          * receive commit_rxon request
 236          * abort any previous channel switch if still in process
 237          */
 238         if (priv->switch_rxon.switch_in_progress &&
 239             (priv->switch_rxon.channel != ctx->staging.channel)) {
 240                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 241                       le16_to_cpu(priv->switch_rxon.channel));
 242                 iwl_chswitch_done(priv, false);
 243         }
 244
 245         /*
 246          * If we don't need to send a full RXON, we can use
 247          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 248          * and other flags for the current radio configuration.
 249          */
 250         if (!iwl_full_rxon_required(priv, ctx)) {
 251                 ret = iwlagn_send_rxon_assoc(priv, ctx);
 252                 if (ret) {
 253                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 254                         return ret;
 255                 }
 256
 257                 memcpy(active, &ctx->staging, sizeof(*active));
 258                 iwl_print_rx_config_cmd(priv, ctx);
 259                 return 0;
 260         }
 261
 262         if (priv->cfg->ops->hcmd->set_pan_params) {
 263                 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
 264                 if (ret)
 265                         return ret;
 266         }
 267
 268         iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->mod_params->sw_crypto);
 269
 270         IWL_DEBUG_INFO(priv,
 271                        "Going to commit RXON\n"
 272                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
 273                        "  * channel = %d\n"
 274                        "  * bssid = %pM\n",
 275                        (new_assoc ? "" : "out"),
 276                        le16_to_cpu(ctx->staging.channel),
 277                        ctx->staging.bssid_addr);
 278
 279         /*
 280          * Always clear associated first, but with the correct config.
 281          * This is required as for example station addition for the
 282          * AP station must be done after the BSSID is set to correctly
 283          * set up filters in the device.
 284          */
 285         if ((old_assoc && new_assoc) || !new_assoc) {
 286                 if (ctx->ctxid == IWL_RXON_CTX_BSS)
 287                         ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 288                 else
 289                         ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 290                 if (ret)
 291                         return ret;
 292
 293                 memcpy(active, &ctx->staging, sizeof(*active));
 294
 295                 /*
 296                  * Un-assoc RXON clears the station table and WEP
 297                  * keys, so we have to restore those afterwards.
 298                  */
 299                 iwl_clear_ucode_stations(priv, ctx);
 300                 iwl_restore_stations(priv, ctx);
 301                 ret = iwl_restore_default_wep_keys(priv, ctx);
 302                 if (ret) {
 303                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 304                         return ret;
 305                 }
 306         }
 307
 308         /* RXON timing must be before associated RXON */
 309         ret = iwl_send_rxon_timing(priv, ctx);
 310         if (ret) {
 311                 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 312                 return ret;
 313         }
 314
 315         if (new_assoc) {
 316                 /* QoS info may be cleared by previous un-assoc RXON */
 317                 iwlagn_update_qos(priv, ctx);
 318
 319                 /*
 320                  * We'll run into this code path when beaconing is
 321                  * enabled, but then we also need to send the beacon
 322                  * to the device.
 323                  */
 324                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 325                         ret = iwlagn_update_beacon(priv, ctx->vif);
 326                         if (ret) {
 327                                 IWL_ERR(priv,
 328                                         "Error sending required beacon (%d)!\n",
 329                                         ret);
 330                                 return ret;
 331                         }
 332                 }
 333
 334                 priv->start_calib = 0;
 335                 /*
 336                  * Apply the new configuration.
 337                  *
 338                  * Associated RXON doesn't clear the station table in uCode,
 339                  * so we don't need to restore stations etc. after this.
 340                  */
 341                 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
 342                               sizeof(struct iwl_rxon_cmd), &ctx->staging);
 343                 if (ret) {
 344                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 345                         return ret;
 346                 }
 347                 memcpy(active, &ctx->staging, sizeof(*active));
 348
 349                 iwl_reprogram_ap_sta(priv, ctx);
 350
 351                 /* IBSS beacon needs to be sent after setting assoc */
 352                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 353                         if (iwlagn_update_beacon(priv, ctx->vif))
 354                                 IWL_ERR(priv, "Error sending IBSS beacon\n");
 355         }
 356
 357         iwl_print_rx_config_cmd(priv, ctx);
 358
 359         iwl_init_sensitivity(priv);
 360
 361         /*
 362          * If we issue a new RXON command which required a tune then we must
 363          * send a new TXPOWER command or we won't be able to Tx any frames.
 364          *
 365          * It's expected we set power here if channel is changing.
 366          */
 367         ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 368         if (ret) {
 369                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 370                 return ret;
 371         }
 372
 373         return 0;
 374 }
 375
 376 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
 377 {
 378         struct iwl_priv *priv = hw->priv;
 379         struct iwl_rxon_context *ctx;
 380         struct ieee80211_conf *conf = &hw->conf;
 381         struct ieee80211_channel *channel = conf->channel;
 382         const struct iwl_channel_info *ch_info;
 383         int ret = 0;
 384
 385         IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
 386
 387         mutex_lock(&priv->mutex);
 388
 389         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
 390                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
 391                 goto out;
 392         }
 393
 394         if (!iwl_is_ready(priv)) {
 395                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 396                 goto out;
 397         }
 398
 399         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
 400                        IEEE80211_CONF_CHANGE_CHANNEL)) {
 401                 /* mac80211 uses static for non-HT which is what we want */
 402                 priv->current_ht_config.smps = conf->smps_mode;
 403
 404                 /*
 405                  * Recalculate chain counts.
 406                  *
 407                  * If monitor mode is enabled then mac80211 will
 408                  * set up the SM PS mode to OFF if an HT channel is
 409                  * configured.
 410                  */
 411                 if (priv->cfg->ops->hcmd->set_rxon_chain)
 412                         for_each_context(priv, ctx)
 413                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 414         }
 415
 416         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 417                 unsigned long flags;
 418
 419                 ch_info = iwl_get_channel_info(priv, channel->band,
 420                                                channel->hw_value);
 421                 if (!is_channel_valid(ch_info)) {
 422                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
 423                         ret = -EINVAL;
 424                         goto out;
 425                 }
 426
 427                 spin_lock_irqsave(&priv->lock, flags);
 428
 429                 for_each_context(priv, ctx) {
 430                         /* Configure HT40 channels */
 431                         if (ctx->ht.enabled != conf_is_ht(conf))
 432                                 ctx->ht.enabled = conf_is_ht(conf);
 433
 434                         if (ctx->ht.enabled) {
 435                                 if (conf_is_ht40_minus(conf)) {
 436                                         ctx->ht.extension_chan_offset =
 437                                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 438                                         ctx->ht.is_40mhz = true;
 439                                 } else if (conf_is_ht40_plus(conf)) {
 440                                         ctx->ht.extension_chan_offset =
 441                                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 442                                         ctx->ht.is_40mhz = true;
 443                                 } else {
 444                                         ctx->ht.extension_chan_offset =
 445                                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
 446                                         ctx->ht.is_40mhz = false;
 447                                 }
 448                         } else
 449                                 ctx->ht.is_40mhz = false;
 450
 451                         /*
 452                          * Default to no protection. Protection mode will
 453                          * later be set from BSS config in iwl_ht_conf
 454                          */
 455                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
 456
 457                         /* if we are switching from ht to 2.4 clear flags
 458                          * from any ht related info since 2.4 does not
 459                          * support ht */
 460                         if (le16_to_cpu(ctx->staging.channel) !=
 461                             channel->hw_value)
 462                                 ctx->staging.flags = 0;
 463
 464                         iwl_set_rxon_channel(priv, channel, ctx);
 465                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
 466
 467                         iwl_set_flags_for_band(priv, ctx, channel->band,
 468                                                ctx->vif);
 469                 }
 470
 471                 spin_unlock_irqrestore(&priv->lock, flags);
 472
 473                 iwl_update_bcast_stations(priv);
 474
 475                 /*
 476                  * The list of supported rates and rate mask can be different
 477                  * for each band; since the band may have changed, reset
 478                  * the rate mask to what mac80211 lists.
 479                  */
 480                 iwl_set_rate(priv);
 481         }
 482
 483         if (changed & (IEEE80211_CONF_CHANGE_PS |
 484                         IEEE80211_CONF_CHANGE_IDLE)) {
 485                 ret = iwl_power_update_mode(priv, false);
 486                 if (ret)
 487                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
 488         }
 489
 490         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 491                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
 492                         priv->tx_power_user_lmt, conf->power_level);
 493
 494                 iwl_set_tx_power(priv, conf->power_level, false);
 495         }
 496
 497         for_each_context(priv, ctx) {
 498                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 499                         continue;
 500                 iwlagn_commit_rxon(priv, ctx);
 501         }
 502  out:
 503         mutex_unlock(&priv->mutex);
 504         return ret;
 505 }
 506
 507 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
 508                                        struct iwl_rxon_context *ctx,
 509                                        struct ieee80211_bss_conf *bss_conf)
 510 {
 511         struct ieee80211_vif *vif = ctx->vif;
 512         struct iwl_rxon_context *tmp;
 513         struct ieee80211_sta *sta;
 514         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 515         struct ieee80211_sta_ht_cap *ht_cap;
 516         bool need_multiple;
 517
 518         lockdep_assert_held(&priv->mutex);
 519
 520         switch (vif->type) {
 521         case NL80211_IFTYPE_STATION:
 522                 rcu_read_lock();
 523                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
 524                 if (!sta) {
 525                         /*
 526                          * If at all, this can only happen through a race
 527                          * when the AP disconnects us while we're still
 528                          * setting up the connection, in that case mac80211
 529                          * will soon tell us about that.
 530                          */
 531                         need_multiple = false;
 532                         rcu_read_unlock();
 533                         break;
 534                 }
 535
 536                 ht_cap = &sta->ht_cap;
 537
 538                 need_multiple = true;
 539
 540                 /*
 541                  * If the peer advertises no support for receiving 2 and 3
 542                  * stream MCS rates, it can't be transmitting them either.
 543                  */
 544                 if (ht_cap->mcs.rx_mask[1] == 0 &&
 545                     ht_cap->mcs.rx_mask[2] == 0) {
 546                         need_multiple = false;
 547                 } else if (!(ht_cap->mcs.tx_params &
 548                                                 IEEE80211_HT_MCS_TX_DEFINED)) {
 549                         /* If it can't TX MCS at all ... */
 550                         need_multiple = false;
 551                 } else if (ht_cap->mcs.tx_params &
 552                                                 IEEE80211_HT_MCS_TX_RX_DIFF) {
 553                         int maxstreams;
 554
 555                         /*
 556                          * But if it can receive them, it might still not
 557                          * be able to transmit them, which is what we need
 558                          * to check here -- so check the number of streams
 559                          * it advertises for TX (if different from RX).
 560                          */
 561
 562                         maxstreams = (ht_cap->mcs.tx_params &
 563                                  IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
 564                         maxstreams >>=
 565                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
 566                         maxstreams += 1;
 567
 568                         if (maxstreams <= 1)
 569                                 need_multiple = false;
 570                 }
 571
 572                 rcu_read_unlock();
 573                 break;
 574         case NL80211_IFTYPE_ADHOC:
 575                 /* currently */
 576                 need_multiple = false;
 577                 break;
 578         default:
 579                 /* only AP really */
 580                 need_multiple = true;
 581                 break;
 582         }
 583
 584         ctx->ht_need_multiple_chains = need_multiple;
 585
 586         if (!need_multiple) {
 587                 /* check all contexts */
 588                 for_each_context(priv, tmp) {
 589                         if (!tmp->vif)
 590                                 continue;
 591                         if (tmp->ht_need_multiple_chains) {
 592                                 need_multiple = true;
 593                                 break;
 594                         }
 595                 }
 596         }
 597
 598         ht_conf->single_chain_sufficient = !need_multiple;
 599 }
 600
 601 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
 602                              struct ieee80211_vif *vif,
 603                              struct ieee80211_bss_conf *bss_conf,
 604                              u32 changes)
 605 {
 606         struct iwl_priv *priv = hw->priv;
 607         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 608         int ret;
 609         bool force = false;
 610
 611         mutex_lock(&priv->mutex);
 612
 613         if (unlikely(!iwl_is_ready(priv))) {
 614                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 615                 mutex_unlock(&priv->mutex);
 616                 return;
 617         }
 618
 619         if (unlikely(!ctx->vif)) {
 620                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
 621                 mutex_unlock(&priv->mutex);
 622                 return;
 623         }
 624
 625         if (changes & BSS_CHANGED_BEACON_INT)
 626                 force = true;
 627
 628         if (changes & BSS_CHANGED_QOS) {
 629                 ctx->qos_data.qos_active = bss_conf->qos;
 630                 iwlagn_update_qos(priv, ctx);
 631         }
 632
 633         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
 634         if (vif->bss_conf.use_short_preamble)
 635                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 636         else
 637                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 638
 639         if (changes & BSS_CHANGED_ASSOC) {
 640                 if (bss_conf->assoc) {
 641                         priv->timestamp = bss_conf->timestamp;
 642                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 643                 } else {
 644                         /*
 645                          * If we disassociate while there are pending
 646                          * frames, just wake up the queues and let the
 647                          * frames "escape" ... This shouldn't really
 648                          * be happening to start with, but we should
 649                          * not get stuck in this case either since it
 650                          * can happen if userspace gets confused.
 651                          */
 652                         if (ctx->last_tx_rejected) {
 653                                 ctx->last_tx_rejected = false;
 654                                 iwl_wake_any_queue(priv, ctx);
 655                         }
 656                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 657                 }
 658         }
 659
 660         if (ctx->ht.enabled) {
 661                 ctx->ht.protection = bss_conf->ht_operation_mode &
 662                                         IEEE80211_HT_OP_MODE_PROTECTION;
 663                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
 664                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 665                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
 666                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
 667         }
 668
 669         if (priv->cfg->ops->hcmd->set_rxon_chain)
 670                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 671
 672         if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
 673                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
 674         else
 675                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
 676
 677         if (bss_conf->use_cts_prot)
 678                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
 679         else
 680                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
 681
 682         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
 683
 684         if (vif->type == NL80211_IFTYPE_AP ||
 685             vif->type == NL80211_IFTYPE_ADHOC) {
 686                 if (vif->bss_conf.enable_beacon) {
 687                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 688                         priv->beacon_ctx = ctx;
 689                 } else {
 690                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 691                         priv->beacon_ctx = NULL;
 692                 }
 693         }
 694
 695         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 696                 iwlagn_commit_rxon(priv, ctx);
 697
 698         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
 699                 /*
 700                  * The chain noise calibration will enable PM upon
 701                  * completion. If calibration has already been run
 702                  * then we need to enable power management here.
 703                  */
 704                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
 705                         iwl_power_update_mode(priv, false);
 706
 707                 /* Enable RX differential gain and sensitivity calibrations */
 708                 iwl_chain_noise_reset(priv);
 709                 priv->start_calib = 1;
 710         }
 711
 712         if (changes & BSS_CHANGED_IBSS) {
 713                 ret = iwlagn_manage_ibss_station(priv, vif,
 714                                                  bss_conf->ibss_joined);
 715                 if (ret)
 716                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
 717                                 bss_conf->ibss_joined ? "add" : "remove",
 718                                 bss_conf->bssid);
 719         }
 720
 721         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
 722             priv->beacon_ctx) {
 723                 if (iwlagn_update_beacon(priv, vif))
 724                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 725         }
 726
 727         mutex_unlock(&priv->mutex);
 728 }
 729
 730 void iwlagn_post_scan(struct iwl_priv *priv)
 731 {
 732         struct iwl_rxon_context *ctx;
 733
 734         /*
 735          * Since setting the RXON may have been deferred while
 736          * performing the scan, fire one off if needed
 737          */
 738         for_each_context(priv, ctx)
 739                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 740                         iwlagn_commit_rxon(priv, ctx);
 741
 742         if (priv->cfg->ops->hcmd->set_pan_params)
 743                 priv->cfg->ops->hcmd->set_pan_params(priv);
 744 }