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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 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 <linux/etherdevice.h>
  28 #include "iwl-dev.h"
  29 #include "iwl-agn.h"
  30 #include "iwl-core.h"
  31 #include "iwl-agn-calib.h"
  32 #include "iwl-trans.h"
  33 #include "iwl-shared.h"
  34
  35 static int iwlagn_disable_bss(struct iwl_priv *priv,
  36                               struct iwl_rxon_context *ctx,
  37                               struct iwl_rxon_cmd *send)
  38 {
  39         __le32 old_filter = send->filter_flags;
  40         int ret;
  41
  42         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  43         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
  44                                 CMD_SYNC, sizeof(*send), send);
  45
  46         send->filter_flags = old_filter;
  47
  48         if (ret)
  49                 IWL_DEBUG_QUIET_RFKILL(priv,
  50                         "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
  51
  52         return ret;
  53 }
  54
  55 static int iwlagn_disable_pan(struct iwl_priv *priv,
  56                               struct iwl_rxon_context *ctx,
  57                               struct iwl_rxon_cmd *send)
  58 {
  59         struct iwl_notification_wait disable_wait;
  60         __le32 old_filter = send->filter_flags;
  61         u8 old_dev_type = send->dev_type;
  62         int ret;
  63         static const u8 deactivate_cmd[] = {
  64                 REPLY_WIPAN_DEACTIVATION_COMPLETE
  65         };
  66
  67         iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
  68                                    deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
  69                                    NULL, NULL);
  70
  71         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  72         send->dev_type = RXON_DEV_TYPE_P2P;
  73         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
  74                                 CMD_SYNC, sizeof(*send), send);
  75
  76         send->filter_flags = old_filter;
  77         send->dev_type = old_dev_type;
  78
  79         if (ret) {
  80                 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
  81                 iwl_remove_notification(&priv->notif_wait, &disable_wait);
  82         } else {
  83                 ret = iwl_wait_notification(&priv->notif_wait,
  84                                             &disable_wait, HZ);
  85                 if (ret)
  86                         IWL_ERR(priv, "Timed out waiting for PAN disable\n");
  87         }
  88
  89         return ret;
  90 }
  91
  92 static int iwlagn_disconn_pan(struct iwl_priv *priv,
  93                               struct iwl_rxon_context *ctx,
  94                               struct iwl_rxon_cmd *send)
  95 {
  96         __le32 old_filter = send->filter_flags;
  97         int ret;
  98
  99         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 100         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
 101                                 sizeof(*send), send);
 102
 103         send->filter_flags = old_filter;
 104
 105         return ret;
 106 }
 107
 108 static void iwlagn_update_qos(struct iwl_priv *priv,
 109                               struct iwl_rxon_context *ctx)
 110 {
 111         int ret;
 112
 113         if (!ctx->is_active)
 114                 return;
 115
 116         ctx->qos_data.def_qos_parm.qos_flags = 0;
 117
 118         if (ctx->qos_data.qos_active)
 119                 ctx->qos_data.def_qos_parm.qos_flags |=
 120                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 121
 122         if (ctx->ht.enabled)
 123                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 124
 125         IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 126                       ctx->qos_data.qos_active,
 127                       ctx->qos_data.def_qos_parm.qos_flags);
 128
 129         ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC,
 130                                sizeof(struct iwl_qosparam_cmd),
 131                                &ctx->qos_data.def_qos_parm);
 132         if (ret)
 133                 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
 134 }
 135
 136 static int iwlagn_update_beacon(struct iwl_priv *priv,
 137                                 struct ieee80211_vif *vif)
 138 {
 139         lockdep_assert_held(&priv->mutex);
 140
 141         dev_kfree_skb(priv->beacon_skb);
 142         priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
 143         if (!priv->beacon_skb)
 144                 return -ENOMEM;
 145         return iwlagn_send_beacon_cmd(priv);
 146 }
 147
 148 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
 149                            struct iwl_rxon_context *ctx)
 150 {
 151         int ret = 0;
 152         struct iwl_rxon_assoc_cmd rxon_assoc;
 153         const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
 154         const struct iwl_rxon_cmd *rxon2 = &ctx->active;
 155
 156         if ((rxon1->flags == rxon2->flags) &&
 157             (rxon1->filter_flags == rxon2->filter_flags) &&
 158             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 159             (rxon1->ofdm_ht_single_stream_basic_rates ==
 160              rxon2->ofdm_ht_single_stream_basic_rates) &&
 161             (rxon1->ofdm_ht_dual_stream_basic_rates ==
 162              rxon2->ofdm_ht_dual_stream_basic_rates) &&
 163             (rxon1->ofdm_ht_triple_stream_basic_rates ==
 164              rxon2->ofdm_ht_triple_stream_basic_rates) &&
 165             (rxon1->acquisition_data == rxon2->acquisition_data) &&
 166             (rxon1->rx_chain == rxon2->rx_chain) &&
 167             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 168                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
 169                 return 0;
 170         }
 171
 172         rxon_assoc.flags = ctx->staging.flags;
 173         rxon_assoc.filter_flags = ctx->staging.filter_flags;
 174         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
 175         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
 176         rxon_assoc.reserved1 = 0;
 177         rxon_assoc.reserved2 = 0;
 178         rxon_assoc.reserved3 = 0;
 179         rxon_assoc.ofdm_ht_single_stream_basic_rates =
 180             ctx->staging.ofdm_ht_single_stream_basic_rates;
 181         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 182             ctx->staging.ofdm_ht_dual_stream_basic_rates;
 183         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
 184         rxon_assoc.ofdm_ht_triple_stream_basic_rates =
 185                  ctx->staging.ofdm_ht_triple_stream_basic_rates;
 186         rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
 187
 188         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
 189                                 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
 190         return ret;
 191 }
 192
 193 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 194 {
 195         u16 new_val;
 196         u16 beacon_factor;
 197
 198         /*
 199          * If mac80211 hasn't given us a beacon interval, program
 200          * the default into the device (not checking this here
 201          * would cause the adjustment below to return the maximum
 202          * value, which may break PAN.)
 203          */
 204         if (!beacon_val)
 205                 return DEFAULT_BEACON_INTERVAL;
 206
 207         /*
 208          * If the beacon interval we obtained from the peer
 209          * is too large, we'll have to wake up more often
 210          * (and in IBSS case, we'll beacon too much)
 211          *
 212          * For example, if max_beacon_val is 4096, and the
 213          * requested beacon interval is 7000, we'll have to
 214          * use 3500 to be able to wake up on the beacons.
 215          *
 216          * This could badly influence beacon detection stats.
 217          */
 218
 219         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 220         new_val = beacon_val / beacon_factor;
 221
 222         if (!new_val)
 223                 new_val = max_beacon_val;
 224
 225         return new_val;
 226 }
 227
 228 static int iwl_send_rxon_timing(struct iwl_priv *priv,
 229                                 struct iwl_rxon_context *ctx)
 230 {
 231         u64 tsf;
 232         s32 interval_tm, rem;
 233         struct ieee80211_conf *conf = NULL;
 234         u16 beacon_int;
 235         struct ieee80211_vif *vif = ctx->vif;
 236
 237         conf = &priv->hw->conf;
 238
 239         lockdep_assert_held(&priv->mutex);
 240
 241         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 242
 243         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 244         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 245
 246         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 247
 248         /*
 249          * TODO: For IBSS we need to get atim_window from mac80211,
 250          *       for now just always use 0
 251          */
 252         ctx->timing.atim_window = 0;
 253
 254         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 255             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 256             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 257             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 258             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 259                 ctx->timing.beacon_interval =
 260                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 261                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 262         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 263                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 264                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 265                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 266                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 267                     !ctx->vif->bss_conf.beacon_int)) {
 268                 ctx->timing.beacon_interval =
 269                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 270                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 271         } else {
 272                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 273                         IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 274                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 275         }
 276
 277         ctx->beacon_int = beacon_int;
 278
 279         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 280         interval_tm = beacon_int * TIME_UNIT;
 281         rem = do_div(tsf, interval_tm);
 282         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 283
 284         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 285
 286         IWL_DEBUG_ASSOC(priv,
 287                         "beacon interval %d beacon timer %d beacon tim %d\n",
 288                         le16_to_cpu(ctx->timing.beacon_interval),
 289                         le32_to_cpu(ctx->timing.beacon_init_val),
 290                         le16_to_cpu(ctx->timing.atim_window));
 291
 292         return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 293                                 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
 294 }
 295
 296 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
 297                                struct iwl_rxon_context *ctx)
 298 {
 299         int ret;
 300         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 301
 302         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 303                 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 304         } else {
 305                 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 306                 if (ret)
 307                         return ret;
 308                 if (ctx->vif) {
 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                         ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
 315                 }
 316         }
 317         if (ret)
 318                 return ret;
 319
 320         /*
 321          * Un-assoc RXON clears the station table and WEP
 322          * keys, so we have to restore those afterwards.
 323          */
 324         iwl_clear_ucode_stations(priv, ctx);
 325         /* update -- might need P2P now */
 326         iwl_update_bcast_station(priv, ctx);
 327         iwl_restore_stations(priv, ctx);
 328         ret = iwl_restore_default_wep_keys(priv, ctx);
 329         if (ret) {
 330                 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 331                 return ret;
 332         }
 333
 334         memcpy(active, &ctx->staging, sizeof(*active));
 335         return 0;
 336 }
 337
 338 static int iwlagn_rxon_connect(struct iwl_priv *priv,
 339                                struct iwl_rxon_context *ctx)
 340 {
 341         int ret;
 342         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 343
 344         /* RXON timing must be before associated RXON */
 345         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 346                 ret = iwl_send_rxon_timing(priv, ctx);
 347                 if (ret) {
 348                         IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 349                         return ret;
 350                 }
 351         }
 352         /* QoS info may be cleared by previous un-assoc RXON */
 353         iwlagn_update_qos(priv, ctx);
 354
 355         /*
 356          * We'll run into this code path when beaconing is
 357          * enabled, but then we also need to send the beacon
 358          * to the device.
 359          */
 360         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 361                 ret = iwlagn_update_beacon(priv, ctx->vif);
 362                 if (ret) {
 363                         IWL_ERR(priv,
 364                                 "Error sending required beacon (%d)!\n",
 365                                 ret);
 366                         return ret;
 367                 }
 368         }
 369
 370         priv->start_calib = 0;
 371         /*
 372          * Apply the new configuration.
 373          *
 374          * Associated RXON doesn't clear the station table in uCode,
 375          * so we don't need to restore stations etc. after this.
 376          */
 377         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
 378                       sizeof(struct iwl_rxon_cmd), &ctx->staging);
 379         if (ret) {
 380                 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 381                 return ret;
 382         }
 383         memcpy(active, &ctx->staging, sizeof(*active));
 384
 385         /* IBSS beacon needs to be sent after setting assoc */
 386         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 387                 if (iwlagn_update_beacon(priv, ctx->vif))
 388                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 389         iwl_init_sensitivity(priv);
 390
 391         /*
 392          * If we issue a new RXON command which required a tune then
 393          * we must send a new TXPOWER command or we won't be able to
 394          * Tx any frames.
 395          *
 396          * It's expected we set power here if channel is changing.
 397          */
 398         ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 399         if (ret) {
 400                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 401                 return ret;
 402         }
 403
 404         if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
 405             cfg(priv)->ht_params && cfg(priv)->ht_params->smps_mode)
 406                 ieee80211_request_smps(ctx->vif,
 407                                        cfg(priv)->ht_params->smps_mode);
 408
 409         return 0;
 410 }
 411
 412 int iwlagn_set_pan_params(struct iwl_priv *priv)
 413 {
 414         struct iwl_wipan_params_cmd cmd;
 415         struct iwl_rxon_context *ctx_bss, *ctx_pan;
 416         int slot0 = 300, slot1 = 0;
 417         int ret;
 418
 419         if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
 420                 return 0;
 421
 422         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 423
 424         lockdep_assert_held(&priv->mutex);
 425
 426         ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
 427         ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
 428
 429         /*
 430          * If the PAN context is inactive, then we don't need
 431          * to update the PAN parameters, the last thing we'll
 432          * have done before it goes inactive is making the PAN
 433          * parameters be WLAN-only.
 434          */
 435         if (!ctx_pan->is_active)
 436                 return 0;
 437
 438         memset(&cmd, 0, sizeof(cmd));
 439
 440         /* only 2 slots are currently allowed */
 441         cmd.num_slots = 2;
 442
 443         cmd.slots[0].type = 0; /* BSS */
 444         cmd.slots[1].type = 1; /* PAN */
 445
 446         if (priv->hw_roc_setup) {
 447                 /* both contexts must be used for this to happen */
 448                 slot1 = IWL_MIN_SLOT_TIME;
 449                 slot0 = 3000;
 450         } else if (ctx_bss->vif && ctx_pan->vif) {
 451                 int bcnint = ctx_pan->beacon_int;
 452                 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
 453
 454                 /* should be set, but seems unused?? */
 455                 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
 456
 457                 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
 458                     bcnint &&
 459                     bcnint != ctx_bss->beacon_int) {
 460                         IWL_ERR(priv,
 461                                 "beacon intervals don't match (%d, %d)\n",
 462                                 ctx_bss->beacon_int, ctx_pan->beacon_int);
 463                 } else
 464                         bcnint = max_t(int, bcnint,
 465                                        ctx_bss->beacon_int);
 466                 if (!bcnint)
 467                         bcnint = DEFAULT_BEACON_INTERVAL;
 468                 slot0 = bcnint / 2;
 469                 slot1 = bcnint - slot0;
 470
 471                 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
 472                     (!ctx_bss->vif->bss_conf.idle &&
 473                      !ctx_bss->vif->bss_conf.assoc)) {
 474                         slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 475                         slot1 = IWL_MIN_SLOT_TIME;
 476                 } else if (!ctx_pan->vif->bss_conf.idle &&
 477                            !ctx_pan->vif->bss_conf.assoc) {
 478                         slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 479                         slot0 = IWL_MIN_SLOT_TIME;
 480                 }
 481         } else if (ctx_pan->vif) {
 482                 slot0 = 0;
 483                 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
 484                                         ctx_pan->beacon_int;
 485                 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
 486
 487                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
 488                         slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
 489                         slot1 = IWL_MIN_SLOT_TIME;
 490                 }
 491         }
 492
 493         cmd.slots[0].width = cpu_to_le16(slot0);
 494         cmd.slots[1].width = cpu_to_le16(slot1);
 495
 496         ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC,
 497                         sizeof(cmd), &cmd);
 498         if (ret)
 499                 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
 500
 501         return ret;
 502 }
 503
 504 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
 505                                   struct iwl_rxon_context *ctx, int hw_decrypt)
 506 {
 507         struct iwl_rxon_cmd *rxon = &ctx->staging;
 508
 509         if (hw_decrypt)
 510                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 511         else
 512                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 513
 514 }
 515
 516 /* validate RXON structure is valid */
 517 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
 518                               struct iwl_rxon_context *ctx)
 519 {
 520         struct iwl_rxon_cmd *rxon = &ctx->staging;
 521         u32 errors = 0;
 522
 523         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 524                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 525                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 526                         errors |= BIT(0);
 527                 }
 528                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 529                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 530                         errors |= BIT(1);
 531                 }
 532         } else {
 533                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 534                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 535                         errors |= BIT(2);
 536                 }
 537                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 538                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 539                         errors |= BIT(3);
 540                 }
 541         }
 542         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 543                 IWL_WARN(priv, "mac/bssid mcast!\n");
 544                 errors |= BIT(4);
 545         }
 546
 547         /* make sure basic rates 6Mbps and 1Mbps are supported */
 548         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 549             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 550                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 551                 errors |= BIT(5);
 552         }
 553
 554         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 555                 IWL_WARN(priv, "aid > 2007\n");
 556                 errors |= BIT(6);
 557         }
 558
 559         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 560                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 561                 IWL_WARN(priv, "CCK and short slot\n");
 562                 errors |= BIT(7);
 563         }
 564
 565         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 566                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 567                 IWL_WARN(priv, "CCK and auto detect");
 568                 errors |= BIT(8);
 569         }
 570
 571         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 572                             RXON_FLG_TGG_PROTECT_MSK)) ==
 573                             RXON_FLG_TGG_PROTECT_MSK) {
 574                 IWL_WARN(priv, "TGg but no auto-detect\n");
 575                 errors |= BIT(9);
 576         }
 577
 578         if (rxon->channel == 0) {
 579                 IWL_WARN(priv, "zero channel is invalid\n");
 580                 errors |= BIT(10);
 581         }
 582
 583         WARN(errors, "Invalid RXON (%#x), channel %d",
 584              errors, le16_to_cpu(rxon->channel));
 585
 586         return errors ? -EINVAL : 0;
 587 }
 588
 589 /**
 590  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 591  * @priv: staging_rxon is compared to active_rxon
 592  *
 593  * If the RXON structure is changing enough to require a new tune,
 594  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 595  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 596  */
 597 static int iwl_full_rxon_required(struct iwl_priv *priv,
 598                                   struct iwl_rxon_context *ctx)
 599 {
 600         const struct iwl_rxon_cmd *staging = &ctx->staging;
 601         const struct iwl_rxon_cmd *active = &ctx->active;
 602
 603 #define CHK(cond)                                                       \
 604         if ((cond)) {                                                   \
 605                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 606                 return 1;                                               \
 607         }
 608
 609 #define CHK_NEQ(c1, c2)                                         \
 610         if ((c1) != (c2)) {                                     \
 611                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 612                                #c1 " != " #c2 " - %d != %d\n",  \
 613                                (c1), (c2));                     \
 614                 return 1;                                       \
 615         }
 616
 617         /* These items are only settable from the full RXON command */
 618         CHK(!iwl_is_associated_ctx(ctx));
 619         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
 620         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
 621         CHK(compare_ether_addr(staging->wlap_bssid_addr,
 622                                 active->wlap_bssid_addr));
 623         CHK_NEQ(staging->dev_type, active->dev_type);
 624         CHK_NEQ(staging->channel, active->channel);
 625         CHK_NEQ(staging->air_propagation, active->air_propagation);
 626         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 627                 active->ofdm_ht_single_stream_basic_rates);
 628         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 629                 active->ofdm_ht_dual_stream_basic_rates);
 630         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 631                 active->ofdm_ht_triple_stream_basic_rates);
 632         CHK_NEQ(staging->assoc_id, active->assoc_id);
 633
 634         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 635          * be updated with the RXON_ASSOC command -- however only some
 636          * flag transitions are allowed using RXON_ASSOC */
 637
 638         /* Check if we are not switching bands */
 639         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 640                 active->flags & RXON_FLG_BAND_24G_MSK);
 641
 642         /* Check if we are switching association toggle */
 643         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 644                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 645
 646 #undef CHK
 647 #undef CHK_NEQ
 648
 649         return 0;
 650 }
 651
 652 /**
 653  * iwlagn_commit_rxon - commit staging_rxon to hardware
 654  *
 655  * The RXON command in staging_rxon is committed to the hardware and
 656  * the active_rxon structure is updated with the new data.  This
 657  * function correctly transitions out of the RXON_ASSOC_MSK state if
 658  * a HW tune is required based on the RXON structure changes.
 659  *
 660  * The connect/disconnect flow should be as the following:
 661  *
 662  * 1. make sure send RXON command with association bit unset if not connect
 663  *      this should include the channel and the band for the candidate
 664  *      to be connected to
 665  * 2. Add Station before RXON association with the AP
 666  * 3. RXON_timing has to send before RXON for connection
 667  * 4. full RXON command - associated bit set
 668  * 5. use RXON_ASSOC command to update any flags changes
 669  */
 670 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 671 {
 672         /* cast away the const for active_rxon in this function */
 673         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 674         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
 675         int ret;
 676
 677         lockdep_assert_held(&priv->mutex);
 678
 679         if (!iwl_is_alive(priv))
 680                 return -EBUSY;
 681
 682         /* This function hardcodes a bunch of dual-mode assumptions */
 683         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 684
 685         if (!ctx->is_active)
 686                 return 0;
 687
 688         /* always get timestamp with Rx frame */
 689         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
 690
 691         /*
 692          * force CTS-to-self frames protection if RTS-CTS is not preferred
 693          * one aggregation protection method
 694          */
 695         if (!priv->hw_params.use_rts_for_aggregation)
 696                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
 697
 698         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
 699             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
 700                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 701         else
 702                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 703
 704         iwl_print_rx_config_cmd(priv, ctx->ctxid);
 705         ret = iwl_check_rxon_cmd(priv, ctx);
 706         if (ret) {
 707                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
 708                 return -EINVAL;
 709         }
 710
 711         /*
 712          * receive commit_rxon request
 713          * abort any previous channel switch if still in process
 714          */
 715         if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
 716             (priv->switch_channel != ctx->staging.channel)) {
 717                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 718                               le16_to_cpu(priv->switch_channel));
 719                 iwl_chswitch_done(priv, false);
 720         }
 721
 722         /*
 723          * If we don't need to send a full RXON, we can use
 724          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 725          * and other flags for the current radio configuration.
 726          */
 727         if (!iwl_full_rxon_required(priv, ctx)) {
 728                 ret = iwlagn_send_rxon_assoc(priv, ctx);
 729                 if (ret) {
 730                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 731                         return ret;
 732                 }
 733
 734                 memcpy(active, &ctx->staging, sizeof(*active));
 735                 /*
 736                  * We do not commit tx power settings while channel changing,
 737                  * do it now if after settings changed.
 738                  */
 739                 iwl_set_tx_power(priv, priv->tx_power_next, false);
 740
 741                 /* make sure we are in the right PS state */
 742                 iwl_power_update_mode(priv, true);
 743
 744                 return 0;
 745         }
 746
 747         iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto);
 748
 749         IWL_DEBUG_INFO(priv,
 750                        "Going to commit RXON\n"
 751                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
 752                        "  * channel = %d\n"
 753                        "  * bssid = %pM\n",
 754                        (new_assoc ? "" : "out"),
 755                        le16_to_cpu(ctx->staging.channel),
 756                        ctx->staging.bssid_addr);
 757
 758         /*
 759          * Always clear associated first, but with the correct config.
 760          * This is required as for example station addition for the
 761          * AP station must be done after the BSSID is set to correctly
 762          * set up filters in the device.
 763          */
 764         ret = iwlagn_rxon_disconn(priv, ctx);
 765         if (ret)
 766                 return ret;
 767
 768         ret = iwlagn_set_pan_params(priv);
 769         if (ret)
 770                 return ret;
 771
 772         if (new_assoc)
 773                 return iwlagn_rxon_connect(priv, ctx);
 774
 775         return 0;
 776 }
 777
 778 void iwlagn_config_ht40(struct ieee80211_conf *conf,
 779         struct iwl_rxon_context *ctx)
 780 {
 781         if (conf_is_ht40_minus(conf)) {
 782                 ctx->ht.extension_chan_offset =
 783                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 784                 ctx->ht.is_40mhz = true;
 785         } else if (conf_is_ht40_plus(conf)) {
 786                 ctx->ht.extension_chan_offset =
 787                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 788                 ctx->ht.is_40mhz = true;
 789         } else {
 790                 ctx->ht.extension_chan_offset =
 791                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
 792                 ctx->ht.is_40mhz = false;
 793         }
 794 }
 795
 796 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
 797 {
 798         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 799         struct iwl_rxon_context *ctx;
 800         struct ieee80211_conf *conf = &hw->conf;
 801         struct ieee80211_channel *channel = conf->channel;
 802         const struct iwl_channel_info *ch_info;
 803         int ret = 0;
 804
 805         IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
 806
 807         mutex_lock(&priv->mutex);
 808
 809         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
 810                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
 811                 goto out;
 812         }
 813
 814         if (!iwl_is_ready(priv)) {
 815                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 816                 goto out;
 817         }
 818
 819         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
 820                        IEEE80211_CONF_CHANGE_CHANNEL)) {
 821                 /* mac80211 uses static for non-HT which is what we want */
 822                 priv->current_ht_config.smps = conf->smps_mode;
 823
 824                 /*
 825                  * Recalculate chain counts.
 826                  *
 827                  * If monitor mode is enabled then mac80211 will
 828                  * set up the SM PS mode to OFF if an HT channel is
 829                  * configured.
 830                  */
 831                 for_each_context(priv, ctx)
 832                         iwlagn_set_rxon_chain(priv, ctx);
 833         }
 834
 835         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 836                 ch_info = iwl_get_channel_info(priv, channel->band,
 837                                                channel->hw_value);
 838                 if (!is_channel_valid(ch_info)) {
 839                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
 840                         ret = -EINVAL;
 841                         goto out;
 842                 }
 843
 844                 for_each_context(priv, ctx) {
 845                         /* Configure HT40 channels */
 846                         if (ctx->ht.enabled != conf_is_ht(conf))
 847                                 ctx->ht.enabled = conf_is_ht(conf);
 848
 849                         if (ctx->ht.enabled) {
 850                                 /* if HT40 is used, it should not change
 851                                  * after associated except channel switch */
 852                                 if (!ctx->ht.is_40mhz ||
 853                                                 !iwl_is_associated_ctx(ctx))
 854                                         iwlagn_config_ht40(conf, ctx);
 855                         } else
 856                                 ctx->ht.is_40mhz = false;
 857
 858                         /*
 859                          * Default to no protection. Protection mode will
 860                          * later be set from BSS config in iwl_ht_conf
 861                          */
 862                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
 863
 864                         /* if we are switching from ht to 2.4 clear flags
 865                          * from any ht related info since 2.4 does not
 866                          * support ht */
 867                         if (le16_to_cpu(ctx->staging.channel) !=
 868                             channel->hw_value)
 869                                 ctx->staging.flags = 0;
 870
 871                         iwl_set_rxon_channel(priv, channel, ctx);
 872                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
 873
 874                         iwl_set_flags_for_band(priv, ctx, channel->band,
 875                                                ctx->vif);
 876                 }
 877
 878                 iwl_update_bcast_stations(priv);
 879
 880                 /*
 881                  * The list of supported rates and rate mask can be different
 882                  * for each band; since the band may have changed, reset
 883                  * the rate mask to what mac80211 lists.
 884                  */
 885                 iwl_set_rate(priv);
 886         }
 887
 888         if (changed & (IEEE80211_CONF_CHANGE_PS |
 889                         IEEE80211_CONF_CHANGE_IDLE)) {
 890                 ret = iwl_power_update_mode(priv, false);
 891                 if (ret)
 892                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
 893         }
 894
 895         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 896                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
 897                         priv->tx_power_user_lmt, conf->power_level);
 898
 899                 iwl_set_tx_power(priv, conf->power_level, false);
 900         }
 901
 902         for_each_context(priv, ctx) {
 903                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 904                         continue;
 905                 iwlagn_commit_rxon(priv, ctx);
 906         }
 907  out:
 908         mutex_unlock(&priv->mutex);
 909         IWL_DEBUG_MAC80211(priv, "leave\n");
 910
 911         return ret;
 912 }
 913
 914 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
 915                                        struct iwl_rxon_context *ctx,
 916                                        struct ieee80211_bss_conf *bss_conf)
 917 {
 918         struct ieee80211_vif *vif = ctx->vif;
 919         struct iwl_rxon_context *tmp;
 920         struct ieee80211_sta *sta;
 921         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 922         struct ieee80211_sta_ht_cap *ht_cap;
 923         bool need_multiple;
 924
 925         lockdep_assert_held(&priv->mutex);
 926
 927         switch (vif->type) {
 928         case NL80211_IFTYPE_STATION:
 929                 rcu_read_lock();
 930                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
 931                 if (!sta) {
 932                         /*
 933                          * If at all, this can only happen through a race
 934                          * when the AP disconnects us while we're still
 935                          * setting up the connection, in that case mac80211
 936                          * will soon tell us about that.
 937                          */
 938                         need_multiple = false;
 939                         rcu_read_unlock();
 940                         break;
 941                 }
 942
 943                 ht_cap = &sta->ht_cap;
 944
 945                 need_multiple = true;
 946
 947                 /*
 948                  * If the peer advertises no support for receiving 2 and 3
 949                  * stream MCS rates, it can't be transmitting them either.
 950                  */
 951                 if (ht_cap->mcs.rx_mask[1] == 0 &&
 952                     ht_cap->mcs.rx_mask[2] == 0) {
 953                         need_multiple = false;
 954                 } else if (!(ht_cap->mcs.tx_params &
 955                                                 IEEE80211_HT_MCS_TX_DEFINED)) {
 956                         /* If it can't TX MCS at all ... */
 957                         need_multiple = false;
 958                 } else if (ht_cap->mcs.tx_params &
 959                                                 IEEE80211_HT_MCS_TX_RX_DIFF) {
 960                         int maxstreams;
 961
 962                         /*
 963                          * But if it can receive them, it might still not
 964                          * be able to transmit them, which is what we need
 965                          * to check here -- so check the number of streams
 966                          * it advertises for TX (if different from RX).
 967                          */
 968
 969                         maxstreams = (ht_cap->mcs.tx_params &
 970                                  IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
 971                         maxstreams >>=
 972                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
 973                         maxstreams += 1;
 974
 975                         if (maxstreams <= 1)
 976                                 need_multiple = false;
 977                 }
 978
 979                 rcu_read_unlock();
 980                 break;
 981         case NL80211_IFTYPE_ADHOC:
 982                 /* currently */
 983                 need_multiple = false;
 984                 break;
 985         default:
 986                 /* only AP really */
 987                 need_multiple = true;
 988                 break;
 989         }
 990
 991         ctx->ht_need_multiple_chains = need_multiple;
 992
 993         if (!need_multiple) {
 994                 /* check all contexts */
 995                 for_each_context(priv, tmp) {
 996                         if (!tmp->vif)
 997                                 continue;
 998                         if (tmp->ht_need_multiple_chains) {
 999                                 need_multiple = true;
1000                                 break;
1001                         }
1002                 }
1003         }
1004
1005         ht_conf->single_chain_sufficient = !need_multiple;
1006 }
1007
1008 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1009 {
1010         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1011         int ret;
1012
1013         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1014             iwl_is_any_associated(priv)) {
1015                 struct iwl_calib_chain_noise_reset_cmd cmd;
1016
1017                 /* clear data for chain noise calibration algorithm */
1018                 data->chain_noise_a = 0;
1019                 data->chain_noise_b = 0;
1020                 data->chain_noise_c = 0;
1021                 data->chain_signal_a = 0;
1022                 data->chain_signal_b = 0;
1023                 data->chain_signal_c = 0;
1024                 data->beacon_count = 0;
1025
1026                 memset(&cmd, 0, sizeof(cmd));
1027                 iwl_set_calib_hdr(&cmd.hdr,
1028                         priv->phy_calib_chain_noise_reset_cmd);
1029                 ret = iwl_dvm_send_cmd_pdu(priv,
1030                                         REPLY_PHY_CALIBRATION_CMD,
1031                                         CMD_SYNC, sizeof(cmd), &cmd);
1032                 if (ret)
1033                         IWL_ERR(priv,
1034                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1035                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1036                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1037         }
1038 }
1039
1040 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1041                              struct ieee80211_vif *vif,
1042                              struct ieee80211_bss_conf *bss_conf,
1043                              u32 changes)
1044 {
1045         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1046         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1047         int ret;
1048         bool force = false;
1049
1050         mutex_lock(&priv->mutex);
1051
1052         if (unlikely(!iwl_is_ready(priv))) {
1053                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1054                 mutex_unlock(&priv->mutex);
1055                 return;
1056         }
1057
1058         if (unlikely(!ctx->vif)) {
1059                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1060                 mutex_unlock(&priv->mutex);
1061                 return;
1062         }
1063
1064         if (changes & BSS_CHANGED_BEACON_INT)
1065                 force = true;
1066
1067         if (changes & BSS_CHANGED_QOS) {
1068                 ctx->qos_data.qos_active = bss_conf->qos;
1069                 iwlagn_update_qos(priv, ctx);
1070         }
1071
1072         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1073         if (vif->bss_conf.use_short_preamble)
1074                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1075         else
1076                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1077
1078         if (changes & BSS_CHANGED_ASSOC) {
1079                 if (bss_conf->assoc) {
1080                         priv->timestamp = bss_conf->last_tsf;
1081                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1082                 } else {
1083                         /*
1084                          * If we disassociate while there are pending
1085                          * frames, just wake up the queues and let the
1086                          * frames "escape" ... This shouldn't really
1087                          * be happening to start with, but we should
1088                          * not get stuck in this case either since it
1089                          * can happen if userspace gets confused.
1090                          */
1091                         iwlagn_lift_passive_no_rx(priv);
1092
1093                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1094
1095                         if (ctx->ctxid == IWL_RXON_CTX_BSS)
1096                                 priv->have_rekey_data = false;
1097                 }
1098
1099                 iwlagn_bt_coex_rssi_monitor(priv);
1100         }
1101
1102         if (ctx->ht.enabled) {
1103                 ctx->ht.protection = bss_conf->ht_operation_mode &
1104                                         IEEE80211_HT_OP_MODE_PROTECTION;
1105                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1106                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1107                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1108                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1109         }
1110
1111         iwlagn_set_rxon_chain(priv, ctx);
1112
1113         if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1114                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1115         else
1116                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1117
1118         if (bss_conf->use_cts_prot)
1119                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1120         else
1121                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1122
1123         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1124
1125         if (vif->type == NL80211_IFTYPE_AP ||
1126             vif->type == NL80211_IFTYPE_ADHOC) {
1127                 if (vif->bss_conf.enable_beacon) {
1128                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1129                         priv->beacon_ctx = ctx;
1130                 } else {
1131                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1132                         priv->beacon_ctx = NULL;
1133                 }
1134         }
1135
1136         /*
1137          * If the ucode decides to do beacon filtering before
1138          * association, it will lose beacons that are needed
1139          * before sending frames out on passive channels. This
1140          * causes association failures on those channels. Enable
1141          * receiving beacons in such cases.
1142          */
1143
1144         if (vif->type == NL80211_IFTYPE_STATION) {
1145                 if (!bss_conf->assoc)
1146                         ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1147                 else
1148                         ctx->staging.filter_flags &=
1149                                                     ~RXON_FILTER_BCON_AWARE_MSK;
1150         }
1151
1152         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1153                 iwlagn_commit_rxon(priv, ctx);
1154
1155         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1156                 /*
1157                  * The chain noise calibration will enable PM upon
1158                  * completion. If calibration has already been run
1159                  * then we need to enable power management here.
1160                  */
1161                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1162                         iwl_power_update_mode(priv, false);
1163
1164                 /* Enable RX differential gain and sensitivity calibrations */
1165                 if (!priv->disable_chain_noise_cal)
1166                         iwlagn_chain_noise_reset(priv);
1167                 priv->start_calib = 1;
1168         }
1169
1170         if (changes & BSS_CHANGED_IBSS) {
1171                 ret = iwlagn_manage_ibss_station(priv, vif,
1172                                                  bss_conf->ibss_joined);
1173                 if (ret)
1174                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1175                                 bss_conf->ibss_joined ? "add" : "remove",
1176                                 bss_conf->bssid);
1177         }
1178
1179         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
1180             priv->beacon_ctx) {
1181                 if (iwlagn_update_beacon(priv, vif))
1182                         IWL_ERR(priv, "Error sending IBSS beacon\n");
1183         }
1184
1185         mutex_unlock(&priv->mutex);
1186 }
1187
1188 void iwlagn_post_scan(struct iwl_priv *priv)
1189 {
1190         struct iwl_rxon_context *ctx;
1191
1192         /*
1193          * We do not commit power settings while scan is pending,
1194          * do it now if the settings changed.
1195          */
1196         iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1197         iwl_set_tx_power(priv, priv->tx_power_next, false);
1198
1199         /*
1200          * Since setting the RXON may have been deferred while
1201          * performing the scan, fire one off if needed
1202          */
1203         for_each_context(priv, ctx)
1204                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1205                         iwlagn_commit_rxon(priv, ctx);
1206
1207         iwlagn_set_pan_params(priv);
1208 }