drivers/net/wireless/intel/iwlwifi/dvm/rxon.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   4  * Copyright(c) 2015 Intel Deutschland GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of version 2 of the GNU General Public License as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  * Contact Information:
  23  * Intel Linux Wireless <linuxwifi@intel.com>
  24  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25  *
  26  *****************************************************************************/
  27
  28 #include <linux/etherdevice.h>
  29 #include "iwl-trans.h"
  30 #include "iwl-modparams.h"
  31 #include "dev.h"
  32 #include "agn.h"
  33 #include "calib.h"
  34
  35 /*
  36  * initialize rxon structure with default values from eeprom
  37  */
  38 void iwl_connection_init_rx_config(struct iwl_priv *priv,
  39                                    struct iwl_rxon_context *ctx)
  40 {
  41         memset(&ctx->staging, 0, sizeof(ctx->staging));
  42
  43         if (!ctx->vif) {
  44                 ctx->staging.dev_type = ctx->unused_devtype;
  45         } else
  46         switch (ctx->vif->type) {
  47         case NL80211_IFTYPE_AP:
  48                 ctx->staging.dev_type = ctx->ap_devtype;
  49                 break;
  50
  51         case NL80211_IFTYPE_STATION:
  52                 ctx->staging.dev_type = ctx->station_devtype;
  53                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
  54                 break;
  55
  56         case NL80211_IFTYPE_ADHOC:
  57                 ctx->staging.dev_type = ctx->ibss_devtype;
  58                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
  59                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
  60                                                   RXON_FILTER_ACCEPT_GRP_MSK;
  61                 break;
  62
  63         case NL80211_IFTYPE_MONITOR:
  64                 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
  65                 break;
  66
  67         default:
  68                 IWL_ERR(priv, "Unsupported interface type %d\n",
  69                         ctx->vif->type);
  70                 break;
  71         }
  72
  73 #if 0
  74         /* TODO:  Figure out when short_preamble would be set and cache from
  75          * that */
  76         if (!hw_to_local(priv->hw)->short_preamble)
  77                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
  78         else
  79                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
  80 #endif
  81
  82         ctx->staging.channel =
  83                 cpu_to_le16(priv->hw->conf.chandef.chan->hw_value);
  84         priv->band = priv->hw->conf.chandef.chan->band;
  85
  86         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
  87
  88         /* clear both MIX and PURE40 mode flag */
  89         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
  90                                         RXON_FLG_CHANNEL_MODE_PURE_40);
  91         if (ctx->vif)
  92                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
  93
  94         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
  95         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
  96         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
  97 }
  98
  99 static int iwlagn_disable_bss(struct iwl_priv *priv,
 100                               struct iwl_rxon_context *ctx,
 101                               struct iwl_rxon_cmd *send)
 102 {
 103         __le32 old_filter = send->filter_flags;
 104         int ret;
 105
 106         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 107         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
 108                                 0, sizeof(*send), send);
 109
 110         send->filter_flags = old_filter;
 111
 112         if (ret)
 113                 IWL_DEBUG_QUIET_RFKILL(priv,
 114                         "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
 115
 116         return ret;
 117 }
 118
 119 static int iwlagn_disable_pan(struct iwl_priv *priv,
 120                               struct iwl_rxon_context *ctx,
 121                               struct iwl_rxon_cmd *send)
 122 {
 123         struct iwl_notification_wait disable_wait;
 124         __le32 old_filter = send->filter_flags;
 125         u8 old_dev_type = send->dev_type;
 126         int ret;
 127         static const u16 deactivate_cmd[] = {
 128                 REPLY_WIPAN_DEACTIVATION_COMPLETE
 129         };
 130
 131         iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
 132                                    deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
 133                                    NULL, NULL);
 134
 135         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 136         send->dev_type = RXON_DEV_TYPE_P2P;
 137         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
 138                                 0, sizeof(*send), send);
 139
 140         send->filter_flags = old_filter;
 141         send->dev_type = old_dev_type;
 142
 143         if (ret) {
 144                 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
 145                 iwl_remove_notification(&priv->notif_wait, &disable_wait);
 146         } else {
 147                 ret = iwl_wait_notification(&priv->notif_wait,
 148                                             &disable_wait, HZ);
 149                 if (ret)
 150                         IWL_ERR(priv, "Timed out waiting for PAN disable\n");
 151         }
 152
 153         return ret;
 154 }
 155
 156 static int iwlagn_disconn_pan(struct iwl_priv *priv,
 157                               struct iwl_rxon_context *ctx,
 158                               struct iwl_rxon_cmd *send)
 159 {
 160         __le32 old_filter = send->filter_flags;
 161         int ret;
 162
 163         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 164         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
 165                                 sizeof(*send), send);
 166
 167         send->filter_flags = old_filter;
 168
 169         return ret;
 170 }
 171
 172 static void iwlagn_update_qos(struct iwl_priv *priv,
 173                               struct iwl_rxon_context *ctx)
 174 {
 175         int ret;
 176
 177         if (!ctx->is_active)
 178                 return;
 179
 180         ctx->qos_data.def_qos_parm.qos_flags = 0;
 181
 182         if (ctx->qos_data.qos_active)
 183                 ctx->qos_data.def_qos_parm.qos_flags |=
 184                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 185
 186         if (ctx->ht.enabled)
 187                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 188
 189         IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 190                       ctx->qos_data.qos_active,
 191                       ctx->qos_data.def_qos_parm.qos_flags);
 192
 193         ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0,
 194                                sizeof(struct iwl_qosparam_cmd),
 195                                &ctx->qos_data.def_qos_parm);
 196         if (ret)
 197                 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
 198 }
 199
 200 static int iwlagn_update_beacon(struct iwl_priv *priv,
 201                                 struct ieee80211_vif *vif)
 202 {
 203         lockdep_assert_held(&priv->mutex);
 204
 205         dev_kfree_skb(priv->beacon_skb);
 206         priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
 207         if (!priv->beacon_skb)
 208                 return -ENOMEM;
 209         return iwlagn_send_beacon_cmd(priv);
 210 }
 211
 212 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
 213                                   struct iwl_rxon_context *ctx)
 214 {
 215         int ret = 0;
 216         struct iwl_rxon_assoc_cmd rxon_assoc;
 217         const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
 218         const struct iwl_rxon_cmd *rxon2 = &ctx->active;
 219
 220         if ((rxon1->flags == rxon2->flags) &&
 221             (rxon1->filter_flags == rxon2->filter_flags) &&
 222             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 223             (rxon1->ofdm_ht_single_stream_basic_rates ==
 224              rxon2->ofdm_ht_single_stream_basic_rates) &&
 225             (rxon1->ofdm_ht_dual_stream_basic_rates ==
 226              rxon2->ofdm_ht_dual_stream_basic_rates) &&
 227             (rxon1->ofdm_ht_triple_stream_basic_rates ==
 228              rxon2->ofdm_ht_triple_stream_basic_rates) &&
 229             (rxon1->acquisition_data == rxon2->acquisition_data) &&
 230             (rxon1->rx_chain == rxon2->rx_chain) &&
 231             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 232                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
 233                 return 0;
 234         }
 235
 236         rxon_assoc.flags = ctx->staging.flags;
 237         rxon_assoc.filter_flags = ctx->staging.filter_flags;
 238         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
 239         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
 240         rxon_assoc.reserved1 = 0;
 241         rxon_assoc.reserved2 = 0;
 242         rxon_assoc.reserved3 = 0;
 243         rxon_assoc.ofdm_ht_single_stream_basic_rates =
 244             ctx->staging.ofdm_ht_single_stream_basic_rates;
 245         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 246             ctx->staging.ofdm_ht_dual_stream_basic_rates;
 247         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
 248         rxon_assoc.ofdm_ht_triple_stream_basic_rates =
 249                  ctx->staging.ofdm_ht_triple_stream_basic_rates;
 250         rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
 251
 252         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
 253                                 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
 254         return ret;
 255 }
 256
 257 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 258 {
 259         u16 new_val;
 260         u16 beacon_factor;
 261
 262         /*
 263          * If mac80211 hasn't given us a beacon interval, program
 264          * the default into the device (not checking this here
 265          * would cause the adjustment below to return the maximum
 266          * value, which may break PAN.)
 267          */
 268         if (!beacon_val)
 269                 return DEFAULT_BEACON_INTERVAL;
 270
 271         /*
 272          * If the beacon interval we obtained from the peer
 273          * is too large, we'll have to wake up more often
 274          * (and in IBSS case, we'll beacon too much)
 275          *
 276          * For example, if max_beacon_val is 4096, and the
 277          * requested beacon interval is 7000, we'll have to
 278          * use 3500 to be able to wake up on the beacons.
 279          *
 280          * This could badly influence beacon detection stats.
 281          */
 282
 283         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 284         new_val = beacon_val / beacon_factor;
 285
 286         if (!new_val)
 287                 new_val = max_beacon_val;
 288
 289         return new_val;
 290 }
 291
 292 static int iwl_send_rxon_timing(struct iwl_priv *priv,
 293                                 struct iwl_rxon_context *ctx)
 294 {
 295         u64 tsf;
 296         s32 interval_tm, rem;
 297         struct ieee80211_conf *conf = NULL;
 298         u16 beacon_int;
 299         struct ieee80211_vif *vif = ctx->vif;
 300
 301         conf = &priv->hw->conf;
 302
 303         lockdep_assert_held(&priv->mutex);
 304
 305         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 306
 307         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 308         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 309
 310         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 311
 312         /*
 313          * TODO: For IBSS we need to get atim_window from mac80211,
 314          *       for now just always use 0
 315          */
 316         ctx->timing.atim_window = 0;
 317
 318         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 319             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 320             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 321             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 322             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 323                 ctx->timing.beacon_interval =
 324                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 325                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 326         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 327                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 328                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 329                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 330                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 331                     !ctx->vif->bss_conf.beacon_int)) {
 332                 ctx->timing.beacon_interval =
 333                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 334                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 335         } else {
 336                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 337                         IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 338                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 339         }
 340
 341         ctx->beacon_int = beacon_int;
 342
 343         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 344         interval_tm = beacon_int * TIME_UNIT;
 345         rem = do_div(tsf, interval_tm);
 346         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 347
 348         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 349
 350         IWL_DEBUG_ASSOC(priv,
 351                         "beacon interval %d beacon timer %d beacon tim %d\n",
 352                         le16_to_cpu(ctx->timing.beacon_interval),
 353                         le32_to_cpu(ctx->timing.beacon_init_val),
 354                         le16_to_cpu(ctx->timing.atim_window));
 355
 356         return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 357                                 0, sizeof(ctx->timing), &ctx->timing);
 358 }
 359
 360 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
 361                                struct iwl_rxon_context *ctx)
 362 {
 363         int ret;
 364         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 365
 366         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 367                 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 368         } else {
 369                 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 370                 if (ret)
 371                         return ret;
 372                 if (ctx->vif) {
 373                         ret = iwl_send_rxon_timing(priv, ctx);
 374                         if (ret) {
 375                                 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 376                                 return ret;
 377                         }
 378                         ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
 379                 }
 380         }
 381         if (ret)
 382                 return ret;
 383
 384         /*
 385          * Un-assoc RXON clears the station table and WEP
 386          * keys, so we have to restore those afterwards.
 387          */
 388         iwl_clear_ucode_stations(priv, ctx);
 389         /* update -- might need P2P now */
 390         iwl_update_bcast_station(priv, ctx);
 391         iwl_restore_stations(priv, ctx);
 392         ret = iwl_restore_default_wep_keys(priv, ctx);
 393         if (ret) {
 394                 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 395                 return ret;
 396         }
 397
 398         memcpy(active, &ctx->staging, sizeof(*active));
 399         return 0;
 400 }
 401
 402 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 403 {
 404         int ret;
 405         s8 prev_tx_power;
 406         bool defer;
 407         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 408
 409         if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
 410                 return 0;
 411
 412         lockdep_assert_held(&priv->mutex);
 413
 414         if (priv->tx_power_user_lmt == tx_power && !force)
 415                 return 0;
 416
 417         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
 418                 IWL_WARN(priv,
 419                          "Requested user TXPOWER %d below lower limit %d.\n",
 420                          tx_power,
 421                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
 422                 return -EINVAL;
 423         }
 424
 425         if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
 426                 IWL_WARN(priv,
 427                         "Requested user TXPOWER %d above upper limit %d.\n",
 428                          tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
 429                 return -EINVAL;
 430         }
 431
 432         if (!iwl_is_ready_rf(priv))
 433                 return -EIO;
 434
 435         /* scan complete and commit_rxon use tx_power_next value,
 436          * it always need to be updated for newest request */
 437         priv->tx_power_next = tx_power;
 438
 439         /* do not set tx power when scanning or channel changing */
 440         defer = test_bit(STATUS_SCANNING, &priv->status) ||
 441                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
 442         if (defer && !force) {
 443                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
 444                 return 0;
 445         }
 446
 447         prev_tx_power = priv->tx_power_user_lmt;
 448         priv->tx_power_user_lmt = tx_power;
 449
 450         ret = iwlagn_send_tx_power(priv);
 451
 452         /* if fail to set tx_power, restore the orig. tx power */
 453         if (ret) {
 454                 priv->tx_power_user_lmt = prev_tx_power;
 455                 priv->tx_power_next = prev_tx_power;
 456         }
 457         return ret;
 458 }
 459
 460 static int iwlagn_rxon_connect(struct iwl_priv *priv,
 461                                struct iwl_rxon_context *ctx)
 462 {
 463         int ret;
 464         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 465
 466         /* RXON timing must be before associated RXON */
 467         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 468                 ret = iwl_send_rxon_timing(priv, ctx);
 469                 if (ret) {
 470                         IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 471                         return ret;
 472                 }
 473         }
 474         /* QoS info may be cleared by previous un-assoc RXON */
 475         iwlagn_update_qos(priv, ctx);
 476
 477         /*
 478          * We'll run into this code path when beaconing is
 479          * enabled, but then we also need to send the beacon
 480          * to the device.
 481          */
 482         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 483                 ret = iwlagn_update_beacon(priv, ctx->vif);
 484                 if (ret) {
 485                         IWL_ERR(priv,
 486                                 "Error sending required beacon (%d)!\n",
 487                                 ret);
 488                         return ret;
 489                 }
 490         }
 491
 492         priv->start_calib = 0;
 493         /*
 494          * Apply the new configuration.
 495          *
 496          * Associated RXON doesn't clear the station table in uCode,
 497          * so we don't need to restore stations etc. after this.
 498          */
 499         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
 500                       sizeof(struct iwl_rxon_cmd), &ctx->staging);
 501         if (ret) {
 502                 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 503                 return ret;
 504         }
 505         memcpy(active, &ctx->staging, sizeof(*active));
 506
 507         /* IBSS beacon needs to be sent after setting assoc */
 508         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 509                 if (iwlagn_update_beacon(priv, ctx->vif))
 510                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 511         iwl_init_sensitivity(priv);
 512
 513         /*
 514          * If we issue a new RXON command which required a tune then
 515          * we must send a new TXPOWER command or we won't be able to
 516          * Tx any frames.
 517          *
 518          * It's expected we set power here if channel is changing.
 519          */
 520         ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 521         if (ret) {
 522                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 523                 return ret;
 524         }
 525
 526         if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
 527             priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
 528                 ieee80211_request_smps(ctx->vif,
 529                                        priv->cfg->ht_params->smps_mode);
 530
 531         return 0;
 532 }
 533
 534 int iwlagn_set_pan_params(struct iwl_priv *priv)
 535 {
 536         struct iwl_wipan_params_cmd cmd;
 537         struct iwl_rxon_context *ctx_bss, *ctx_pan;
 538         int slot0 = 300, slot1 = 0;
 539         int ret;
 540
 541         if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
 542                 return 0;
 543
 544         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 545
 546         lockdep_assert_held(&priv->mutex);
 547
 548         ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
 549         ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
 550
 551         /*
 552          * If the PAN context is inactive, then we don't need
 553          * to update the PAN parameters, the last thing we'll
 554          * have done before it goes inactive is making the PAN
 555          * parameters be WLAN-only.
 556          */
 557         if (!ctx_pan->is_active)
 558                 return 0;
 559
 560         memset(&cmd, 0, sizeof(cmd));
 561
 562         /* only 2 slots are currently allowed */
 563         cmd.num_slots = 2;
 564
 565         cmd.slots[0].type = 0; /* BSS */
 566         cmd.slots[1].type = 1; /* PAN */
 567
 568         if (ctx_bss->vif && ctx_pan->vif) {
 569                 int bcnint = ctx_pan->beacon_int;
 570                 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
 571
 572                 /* should be set, but seems unused?? */
 573                 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
 574
 575                 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
 576                     bcnint &&
 577                     bcnint != ctx_bss->beacon_int) {
 578                         IWL_ERR(priv,
 579                                 "beacon intervals don't match (%d, %d)\n",
 580                                 ctx_bss->beacon_int, ctx_pan->beacon_int);
 581                 } else
 582                         bcnint = max_t(int, bcnint,
 583                                        ctx_bss->beacon_int);
 584                 if (!bcnint)
 585                         bcnint = DEFAULT_BEACON_INTERVAL;
 586                 slot0 = bcnint / 2;
 587                 slot1 = bcnint - slot0;
 588
 589                 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
 590                     (!ctx_bss->vif->bss_conf.idle &&
 591                      !ctx_bss->vif->bss_conf.assoc)) {
 592                         slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 593                         slot1 = IWL_MIN_SLOT_TIME;
 594                 } else if (!ctx_pan->vif->bss_conf.idle &&
 595                            !ctx_pan->vif->bss_conf.assoc) {
 596                         slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 597                         slot0 = IWL_MIN_SLOT_TIME;
 598                 }
 599         } else if (ctx_pan->vif) {
 600                 slot0 = 0;
 601                 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
 602                                         ctx_pan->beacon_int;
 603                 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
 604
 605                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
 606                         slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
 607                         slot1 = IWL_MIN_SLOT_TIME;
 608                 }
 609         }
 610
 611         cmd.slots[0].width = cpu_to_le16(slot0);
 612         cmd.slots[1].width = cpu_to_le16(slot1);
 613
 614         ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0,
 615                         sizeof(cmd), &cmd);
 616         if (ret)
 617                 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
 618
 619         return ret;
 620 }
 621
 622 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 623                              struct iwl_ht_config *ht_conf,
 624                              struct iwl_rxon_context *ctx)
 625 {
 626         struct iwl_rxon_cmd *rxon = &ctx->staging;
 627
 628         if (!ctx->ht.enabled) {
 629                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 630                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 631                         RXON_FLG_HT40_PROT_MSK |
 632                         RXON_FLG_HT_PROT_MSK);
 633                 return;
 634         }
 635
 636         /* FIXME: if the definition of ht.protection changed, the "translation"
 637          * will be needed for rxon->flags
 638          */
 639         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
 640                                    RXON_FLG_HT_OPERATING_MODE_POS);
 641
 642         /* Set up channel bandwidth:
 643          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 644         /* clear the HT channel mode before set the mode */
 645         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 646                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 647         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 648                 /* pure ht40 */
 649                 if (ctx->ht.protection ==
 650                     IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 651                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 652                         /*
 653                          * Note: control channel is opposite of extension
 654                          * channel
 655                          */
 656                         switch (ctx->ht.extension_chan_offset) {
 657                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 658                                 rxon->flags &=
 659                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 660                                 break;
 661                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 662                                 rxon->flags |=
 663                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 664                                 break;
 665                         }
 666                 } else {
 667                         /*
 668                          * Note: control channel is opposite of extension
 669                          * channel
 670                          */
 671                         switch (ctx->ht.extension_chan_offset) {
 672                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 673                                 rxon->flags &=
 674                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 675                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 676                                 break;
 677                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 678                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 679                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 680                                 break;
 681                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 682                         default:
 683                                 /*
 684                                  * channel location only valid if in Mixed
 685                                  * mode
 686                                  */
 687                                 IWL_ERR(priv,
 688                                         "invalid extension channel offset\n");
 689                                 break;
 690                         }
 691                 }
 692         } else {
 693                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 694         }
 695
 696         iwlagn_set_rxon_chain(priv, ctx);
 697
 698         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 699                         "extension channel offset 0x%x\n",
 700                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 701                         ctx->ht.extension_chan_offset);
 702 }
 703
 704 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 705 {
 706         struct iwl_rxon_context *ctx;
 707
 708         for_each_context(priv, ctx)
 709                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 710 }
 711
 712 /**
 713  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 714  * @ch: requested channel as a pointer to struct ieee80211_channel
 715
 716  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 717  * in the staging RXON flag structure based on the ch->band
 718  */
 719 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 720                          struct iwl_rxon_context *ctx)
 721 {
 722         enum nl80211_band band = ch->band;
 723         u16 channel = ch->hw_value;
 724
 725         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 726             (priv->band == band))
 727                 return;
 728
 729         ctx->staging.channel = cpu_to_le16(channel);
 730         if (band == NL80211_BAND_5GHZ)
 731                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 732         else
 733                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 734
 735         priv->band = band;
 736
 737         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 738
 739 }
 740
 741 void iwl_set_flags_for_band(struct iwl_priv *priv,
 742                             struct iwl_rxon_context *ctx,
 743                             enum nl80211_band band,
 744                             struct ieee80211_vif *vif)
 745 {
 746         if (band == NL80211_BAND_5GHZ) {
 747                 ctx->staging.flags &=
 748                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 749                       | RXON_FLG_CCK_MSK);
 750                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 751         } else {
 752                 /* Copied from iwl_post_associate() */
 753                 if (vif && vif->bss_conf.use_short_slot)
 754                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 755                 else
 756                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 757
 758                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 759                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 760                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 761         }
 762 }
 763
 764 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
 765                                   struct iwl_rxon_context *ctx, int hw_decrypt)
 766 {
 767         struct iwl_rxon_cmd *rxon = &ctx->staging;
 768
 769         if (hw_decrypt)
 770                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 771         else
 772                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 773
 774 }
 775
 776 /* validate RXON structure is valid */
 777 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
 778                               struct iwl_rxon_context *ctx)
 779 {
 780         struct iwl_rxon_cmd *rxon = &ctx->staging;
 781         u32 errors = 0;
 782
 783         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 784                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 785                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 786                         errors |= BIT(0);
 787                 }
 788                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 789                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 790                         errors |= BIT(1);
 791                 }
 792         } else {
 793                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 794                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 795                         errors |= BIT(2);
 796                 }
 797                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 798                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 799                         errors |= BIT(3);
 800                 }
 801         }
 802         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 803                 IWL_WARN(priv, "mac/bssid mcast!\n");
 804                 errors |= BIT(4);
 805         }
 806
 807         /* make sure basic rates 6Mbps and 1Mbps are supported */
 808         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 809             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 810                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 811                 errors |= BIT(5);
 812         }
 813
 814         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 815                 IWL_WARN(priv, "aid > 2007\n");
 816                 errors |= BIT(6);
 817         }
 818
 819         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 820                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 821                 IWL_WARN(priv, "CCK and short slot\n");
 822                 errors |= BIT(7);
 823         }
 824
 825         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 826                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 827                 IWL_WARN(priv, "CCK and auto detect\n");
 828                 errors |= BIT(8);
 829         }
 830
 831         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 832                             RXON_FLG_TGG_PROTECT_MSK)) ==
 833                             RXON_FLG_TGG_PROTECT_MSK) {
 834                 IWL_WARN(priv, "TGg but no auto-detect\n");
 835                 errors |= BIT(9);
 836         }
 837
 838         if (rxon->channel == 0) {
 839                 IWL_WARN(priv, "zero channel is invalid\n");
 840                 errors |= BIT(10);
 841         }
 842
 843         WARN(errors, "Invalid RXON (%#x), channel %d",
 844              errors, le16_to_cpu(rxon->channel));
 845
 846         return errors ? -EINVAL : 0;
 847 }
 848
 849 /**
 850  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 851  * @priv: staging_rxon is compared to active_rxon
 852  *
 853  * If the RXON structure is changing enough to require a new tune,
 854  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 855  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 856  */
 857 static int iwl_full_rxon_required(struct iwl_priv *priv,
 858                                   struct iwl_rxon_context *ctx)
 859 {
 860         const struct iwl_rxon_cmd *staging = &ctx->staging;
 861         const struct iwl_rxon_cmd *active = &ctx->active;
 862
 863 #define CHK(cond)                                                       \
 864         if ((cond)) {                                                   \
 865                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 866                 return 1;                                               \
 867         }
 868
 869 #define CHK_NEQ(c1, c2)                                         \
 870         if ((c1) != (c2)) {                                     \
 871                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 872                                #c1 " != " #c2 " - %d != %d\n",  \
 873                                (c1), (c2));                     \
 874                 return 1;                                       \
 875         }
 876
 877         /* These items are only settable from the full RXON command */
 878         CHK(!iwl_is_associated_ctx(ctx));
 879         CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
 880         CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
 881         CHK(!ether_addr_equal(staging->wlap_bssid_addr,
 882                               active->wlap_bssid_addr));
 883         CHK_NEQ(staging->dev_type, active->dev_type);
 884         CHK_NEQ(staging->channel, active->channel);
 885         CHK_NEQ(staging->air_propagation, active->air_propagation);
 886         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 887                 active->ofdm_ht_single_stream_basic_rates);
 888         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 889                 active->ofdm_ht_dual_stream_basic_rates);
 890         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 891                 active->ofdm_ht_triple_stream_basic_rates);
 892         CHK_NEQ(staging->assoc_id, active->assoc_id);
 893
 894         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 895          * be updated with the RXON_ASSOC command -- however only some
 896          * flag transitions are allowed using RXON_ASSOC */
 897
 898         /* Check if we are not switching bands */
 899         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 900                 active->flags & RXON_FLG_BAND_24G_MSK);
 901
 902         /* Check if we are switching association toggle */
 903         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 904                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 905
 906 #undef CHK
 907 #undef CHK_NEQ
 908
 909         return 0;
 910 }
 911
 912 #ifdef CONFIG_IWLWIFI_DEBUG
 913 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 914                              enum iwl_rxon_context_id ctxid)
 915 {
 916         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 917         struct iwl_rxon_cmd *rxon = &ctx->staging;
 918
 919         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 920         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 921         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
 922                         le16_to_cpu(rxon->channel));
 923         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
 924                         le32_to_cpu(rxon->flags));
 925         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 926                         le32_to_cpu(rxon->filter_flags));
 927         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 928         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 929                         rxon->ofdm_basic_rates);
 930         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
 931                         rxon->cck_basic_rates);
 932         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 933         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 934         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
 935                         le16_to_cpu(rxon->assoc_id));
 936 }
 937 #endif
 938
 939 static void iwl_calc_basic_rates(struct iwl_priv *priv,
 940                                  struct iwl_rxon_context *ctx)
 941 {
 942         int lowest_present_ofdm = 100;
 943         int lowest_present_cck = 100;
 944         u8 cck = 0;
 945         u8 ofdm = 0;
 946
 947         if (ctx->vif) {
 948                 struct ieee80211_supported_band *sband;
 949                 unsigned long basic = ctx->vif->bss_conf.basic_rates;
 950                 int i;
 951
 952                 sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band];
 953
 954                 for_each_set_bit(i, &basic, BITS_PER_LONG) {
 955                         int hw = sband->bitrates[i].hw_value;
 956                         if (hw >= IWL_FIRST_OFDM_RATE) {
 957                                 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 958                                 if (lowest_present_ofdm > hw)
 959                                         lowest_present_ofdm = hw;
 960                         } else {
 961                                 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 962
 963                                 cck |= BIT(hw);
 964                                 if (lowest_present_cck > hw)
 965                                         lowest_present_cck = hw;
 966                         }
 967                 }
 968         }
 969
 970         /*
 971          * Now we've got the basic rates as bitmaps in the ofdm and cck
 972          * variables. This isn't sufficient though, as there might not
 973          * be all the right rates in the bitmap. E.g. if the only basic
 974          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 975          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 976          *
 977          *    [...] a STA responding to a received frame shall transmit
 978          *    its Control Response frame [...] at the highest rate in the
 979          *    BSSBasicRateSet parameter that is less than or equal to the
 980          *    rate of the immediately previous frame in the frame exchange
 981          *    sequence ([...]) and that is of the same modulation class
 982          *    ([...]) as the received frame. If no rate contained in the
 983          *    BSSBasicRateSet parameter meets these conditions, then the
 984          *    control frame sent in response to a received frame shall be
 985          *    transmitted at the highest mandatory rate of the PHY that is
 986          *    less than or equal to the rate of the received frame, and
 987          *    that is of the same modulation class as the received frame.
 988          *
 989          * As a consequence, we need to add all mandatory rates that are
 990          * lower than all of the basic rates to these bitmaps.
 991          */
 992
 993         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 994                 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
 995         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 996                 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
 997         /* 6M already there or needed so always add */
 998         ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
 999
1000         /*
1001          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
1002          * Note, however:
1003          *  - if no CCK rates are basic, it must be ERP since there must
1004          *    be some basic rates at all, so they're OFDM => ERP PHY
1005          *    (or we're in 5 GHz, and the cck bitmap will never be used)
1006          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
1007          *  - if 5.5M is basic, 1M and 2M are mandatory
1008          *  - if 2M is basic, 1M is mandatory
1009          *  - if 1M is basic, that's the only valid ACK rate.
1010          * As a consequence, it's not as complicated as it sounds, just add
1011          * any lower rates to the ACK rate bitmap.
1012          */
1013         if (IWL_RATE_11M_INDEX < lowest_present_cck)
1014                 cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
1015         if (IWL_RATE_5M_INDEX < lowest_present_cck)
1016                 cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
1017         if (IWL_RATE_2M_INDEX < lowest_present_cck)
1018                 cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
1019         /* 1M already there or needed so always add */
1020         cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
1021
1022         IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
1023                        cck, ofdm);
1024
1025         /* "basic_rates" is a misnomer here -- should be called ACK rates */
1026         ctx->staging.cck_basic_rates = cck;
1027         ctx->staging.ofdm_basic_rates = ofdm;
1028 }
1029
1030 /**
1031  * iwlagn_commit_rxon - commit staging_rxon to hardware
1032  *
1033  * The RXON command in staging_rxon is committed to the hardware and
1034  * the active_rxon structure is updated with the new data.  This
1035  * function correctly transitions out of the RXON_ASSOC_MSK state if
1036  * a HW tune is required based on the RXON structure changes.
1037  *
1038  * The connect/disconnect flow should be as the following:
1039  *
1040  * 1. make sure send RXON command with association bit unset if not connect
1041  *      this should include the channel and the band for the candidate
1042  *      to be connected to
1043  * 2. Add Station before RXON association with the AP
1044  * 3. RXON_timing has to send before RXON for connection
1045  * 4. full RXON command - associated bit set
1046  * 5. use RXON_ASSOC command to update any flags changes
1047  */
1048 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1049 {
1050         /* cast away the const for active_rxon in this function */
1051         struct iwl_rxon_cmd *active = (void *)&ctx->active;
1052         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1053         int ret;
1054
1055         lockdep_assert_held(&priv->mutex);
1056
1057         if (!iwl_is_alive(priv))
1058                 return -EBUSY;
1059
1060         /* This function hardcodes a bunch of dual-mode assumptions */
1061         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1062
1063         if (!ctx->is_active)
1064                 return 0;
1065
1066         /* always get timestamp with Rx frame */
1067         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1068
1069         /* recalculate basic rates */
1070         iwl_calc_basic_rates(priv, ctx);
1071
1072         /*
1073          * force CTS-to-self frames protection if RTS-CTS is not preferred
1074          * one aggregation protection method
1075          */
1076         if (!priv->hw_params.use_rts_for_aggregation)
1077                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1078
1079         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1080             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1081                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1082         else
1083                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1084
1085         iwl_print_rx_config_cmd(priv, ctx->ctxid);
1086         ret = iwl_check_rxon_cmd(priv, ctx);
1087         if (ret) {
1088                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1089                 return -EINVAL;
1090         }
1091
1092         /*
1093          * receive commit_rxon request
1094          * abort any previous channel switch if still in process
1095          */
1096         if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1097             (priv->switch_channel != ctx->staging.channel)) {
1098                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1099                               le16_to_cpu(priv->switch_channel));
1100                 iwl_chswitch_done(priv, false);
1101         }
1102
1103         /*
1104          * If we don't need to send a full RXON, we can use
1105          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1106          * and other flags for the current radio configuration.
1107          */
1108         if (!iwl_full_rxon_required(priv, ctx)) {
1109                 ret = iwlagn_send_rxon_assoc(priv, ctx);
1110                 if (ret) {
1111                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1112                         return ret;
1113                 }
1114
1115                 memcpy(active, &ctx->staging, sizeof(*active));
1116                 /*
1117                  * We do not commit tx power settings while channel changing,
1118                  * do it now if after settings changed.
1119                  */
1120                 iwl_set_tx_power(priv, priv->tx_power_next, false);
1121
1122                 /* make sure we are in the right PS state */
1123                 iwl_power_update_mode(priv, true);
1124
1125                 return 0;
1126         }
1127
1128         iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
1129
1130         IWL_DEBUG_INFO(priv,
1131                        "Going to commit RXON\n"
1132                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
1133                        "  * channel = %d\n"
1134                        "  * bssid = %pM\n",
1135                        (new_assoc ? "" : "out"),
1136                        le16_to_cpu(ctx->staging.channel),
1137                        ctx->staging.bssid_addr);
1138
1139         /*
1140          * Always clear associated first, but with the correct config.
1141          * This is required as for example station addition for the
1142          * AP station must be done after the BSSID is set to correctly
1143          * set up filters in the device.
1144          */
1145         ret = iwlagn_rxon_disconn(priv, ctx);
1146         if (ret)
1147                 return ret;
1148
1149         ret = iwlagn_set_pan_params(priv);
1150         if (ret)
1151                 return ret;
1152
1153         if (new_assoc)
1154                 return iwlagn_rxon_connect(priv, ctx);
1155
1156         return 0;
1157 }
1158
1159 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1160                         struct iwl_rxon_context *ctx)
1161 {
1162         if (conf_is_ht40_minus(conf)) {
1163                 ctx->ht.extension_chan_offset =
1164                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1165                 ctx->ht.is_40mhz = true;
1166         } else if (conf_is_ht40_plus(conf)) {
1167                 ctx->ht.extension_chan_offset =
1168                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1169                 ctx->ht.is_40mhz = true;
1170         } else {
1171                 ctx->ht.extension_chan_offset =
1172                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
1173                 ctx->ht.is_40mhz = false;
1174         }
1175 }
1176
1177 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1178 {
1179         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1180         struct iwl_rxon_context *ctx;
1181         struct ieee80211_conf *conf = &hw->conf;
1182         struct ieee80211_channel *channel = conf->chandef.chan;
1183         int ret = 0;
1184
1185         IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1186
1187         mutex_lock(&priv->mutex);
1188
1189         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1190                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1191                 goto out;
1192         }
1193
1194         if (!iwl_is_ready(priv)) {
1195                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1196                 goto out;
1197         }
1198
1199         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1200                        IEEE80211_CONF_CHANGE_CHANNEL)) {
1201                 /* mac80211 uses static for non-HT which is what we want */
1202                 priv->current_ht_config.smps = conf->smps_mode;
1203
1204                 /*
1205                  * Recalculate chain counts.
1206                  *
1207                  * If monitor mode is enabled then mac80211 will
1208                  * set up the SM PS mode to OFF if an HT channel is
1209                  * configured.
1210                  */
1211                 for_each_context(priv, ctx)
1212                         iwlagn_set_rxon_chain(priv, ctx);
1213         }
1214
1215         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1216                 for_each_context(priv, ctx) {
1217                         /* Configure HT40 channels */
1218                         if (ctx->ht.enabled != conf_is_ht(conf))
1219                                 ctx->ht.enabled = conf_is_ht(conf);
1220
1221                         if (ctx->ht.enabled) {
1222                                 /* if HT40 is used, it should not change
1223                                  * after associated except channel switch */
1224                                 if (!ctx->ht.is_40mhz ||
1225                                                 !iwl_is_associated_ctx(ctx))
1226                                         iwlagn_config_ht40(conf, ctx);
1227                         } else
1228                                 ctx->ht.is_40mhz = false;
1229
1230                         /*
1231                          * Default to no protection. Protection mode will
1232                          * later be set from BSS config in iwl_ht_conf
1233                          */
1234                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1235
1236                         /* if we are switching from ht to 2.4 clear flags
1237                          * from any ht related info since 2.4 does not
1238                          * support ht */
1239                         if (le16_to_cpu(ctx->staging.channel) !=
1240                             channel->hw_value)
1241                                 ctx->staging.flags = 0;
1242
1243                         iwl_set_rxon_channel(priv, channel, ctx);
1244                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1245
1246                         iwl_set_flags_for_band(priv, ctx, channel->band,
1247                                                ctx->vif);
1248                 }
1249
1250                 iwl_update_bcast_stations(priv);
1251         }
1252
1253         if (changed & (IEEE80211_CONF_CHANGE_PS |
1254                         IEEE80211_CONF_CHANGE_IDLE)) {
1255                 ret = iwl_power_update_mode(priv, false);
1256                 if (ret)
1257                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1258         }
1259
1260         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1261                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1262                         priv->tx_power_user_lmt, conf->power_level);
1263
1264                 iwl_set_tx_power(priv, conf->power_level, false);
1265         }
1266
1267         for_each_context(priv, ctx) {
1268                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1269                         continue;
1270                 iwlagn_commit_rxon(priv, ctx);
1271         }
1272  out:
1273         mutex_unlock(&priv->mutex);
1274         IWL_DEBUG_MAC80211(priv, "leave\n");
1275
1276         return ret;
1277 }
1278
1279 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1280                                        struct iwl_rxon_context *ctx,
1281                                        struct ieee80211_bss_conf *bss_conf)
1282 {
1283         struct ieee80211_vif *vif = ctx->vif;
1284         struct iwl_rxon_context *tmp;
1285         struct ieee80211_sta *sta;
1286         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1287         struct ieee80211_sta_ht_cap *ht_cap;
1288         bool need_multiple;
1289
1290         lockdep_assert_held(&priv->mutex);
1291
1292         switch (vif->type) {
1293         case NL80211_IFTYPE_STATION:
1294                 rcu_read_lock();
1295                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1296                 if (!sta) {
1297                         /*
1298                          * If at all, this can only happen through a race
1299                          * when the AP disconnects us while we're still
1300                          * setting up the connection, in that case mac80211
1301                          * will soon tell us about that.
1302                          */
1303                         need_multiple = false;
1304                         rcu_read_unlock();
1305                         break;
1306                 }
1307
1308                 ht_cap = &sta->ht_cap;
1309
1310                 need_multiple = true;
1311
1312                 /*
1313                  * If the peer advertises no support for receiving 2 and 3
1314                  * stream MCS rates, it can't be transmitting them either.
1315                  */
1316                 if (ht_cap->mcs.rx_mask[1] == 0 &&
1317                     ht_cap->mcs.rx_mask[2] == 0) {
1318                         need_multiple = false;
1319                 } else if (!(ht_cap->mcs.tx_params &
1320                                                 IEEE80211_HT_MCS_TX_DEFINED)) {
1321                         /* If it can't TX MCS at all ... */
1322                         need_multiple = false;
1323                 } else if (ht_cap->mcs.tx_params &
1324                                                 IEEE80211_HT_MCS_TX_RX_DIFF) {
1325                         int maxstreams;
1326
1327                         /*
1328                          * But if it can receive them, it might still not
1329                          * be able to transmit them, which is what we need
1330                          * to check here -- so check the number of streams
1331                          * it advertises for TX (if different from RX).
1332                          */
1333
1334                         maxstreams = (ht_cap->mcs.tx_params &
1335                                  IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1336                         maxstreams >>=
1337                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1338                         maxstreams += 1;
1339
1340                         if (maxstreams <= 1)
1341                                 need_multiple = false;
1342                 }
1343
1344                 rcu_read_unlock();
1345                 break;
1346         case NL80211_IFTYPE_ADHOC:
1347                 /* currently */
1348                 need_multiple = false;
1349                 break;
1350         default:
1351                 /* only AP really */
1352                 need_multiple = true;
1353                 break;
1354         }
1355
1356         ctx->ht_need_multiple_chains = need_multiple;
1357
1358         if (!need_multiple) {
1359                 /* check all contexts */
1360                 for_each_context(priv, tmp) {
1361                         if (!tmp->vif)
1362                                 continue;
1363                         if (tmp->ht_need_multiple_chains) {
1364                                 need_multiple = true;
1365                                 break;
1366                         }
1367                 }
1368         }
1369
1370         ht_conf->single_chain_sufficient = !need_multiple;
1371 }
1372
1373 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1374 {
1375         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1376         int ret;
1377
1378         if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)
1379                 return;
1380
1381         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1382             iwl_is_any_associated(priv)) {
1383                 struct iwl_calib_chain_noise_reset_cmd cmd;
1384
1385                 /* clear data for chain noise calibration algorithm */
1386                 data->chain_noise_a = 0;
1387                 data->chain_noise_b = 0;
1388                 data->chain_noise_c = 0;
1389                 data->chain_signal_a = 0;
1390                 data->chain_signal_b = 0;
1391                 data->chain_signal_c = 0;
1392                 data->beacon_count = 0;
1393
1394                 memset(&cmd, 0, sizeof(cmd));
1395                 iwl_set_calib_hdr(&cmd.hdr,
1396                         priv->phy_calib_chain_noise_reset_cmd);
1397                 ret = iwl_dvm_send_cmd_pdu(priv,
1398                                         REPLY_PHY_CALIBRATION_CMD,
1399                                         0, sizeof(cmd), &cmd);
1400                 if (ret)
1401                         IWL_ERR(priv,
1402                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1403                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1404                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1405         }
1406 }
1407
1408 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1409                              struct ieee80211_vif *vif,
1410                              struct ieee80211_bss_conf *bss_conf,
1411                              u32 changes)
1412 {
1413         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1414         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1415         int ret;
1416         bool force = false;
1417
1418         mutex_lock(&priv->mutex);
1419
1420         if (changes & BSS_CHANGED_IDLE && bss_conf->idle) {
1421                 /*
1422                  * If we go idle, then clearly no "passive-no-rx"
1423                  * workaround is needed any more, this is a reset.
1424                  */
1425                 iwlagn_lift_passive_no_rx(priv);
1426         }
1427
1428         if (unlikely(!iwl_is_ready(priv))) {
1429                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1430                 mutex_unlock(&priv->mutex);
1431                 return;
1432         }
1433
1434         if (unlikely(!ctx->vif)) {
1435                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1436                 mutex_unlock(&priv->mutex);
1437                 return;
1438         }
1439
1440         if (changes & BSS_CHANGED_BEACON_INT)
1441                 force = true;
1442
1443         if (changes & BSS_CHANGED_QOS) {
1444                 ctx->qos_data.qos_active = bss_conf->qos;
1445                 iwlagn_update_qos(priv, ctx);
1446         }
1447
1448         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1449         if (vif->bss_conf.use_short_preamble)
1450                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1451         else
1452                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1453
1454         if (changes & BSS_CHANGED_ASSOC) {
1455                 if (bss_conf->assoc) {
1456                         priv->timestamp = bss_conf->sync_tsf;
1457                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1458                 } else {
1459                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1460
1461                         if (ctx->ctxid == IWL_RXON_CTX_BSS)
1462                                 priv->have_rekey_data = false;
1463                 }
1464
1465                 iwlagn_bt_coex_rssi_monitor(priv);
1466         }
1467
1468         if (ctx->ht.enabled) {
1469                 ctx->ht.protection = bss_conf->ht_operation_mode &
1470                                         IEEE80211_HT_OP_MODE_PROTECTION;
1471                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1472                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1473                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1474                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1475         }
1476
1477         iwlagn_set_rxon_chain(priv, ctx);
1478
1479         if (bss_conf->use_cts_prot && (priv->band != NL80211_BAND_5GHZ))
1480                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1481         else
1482                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1483
1484         if (bss_conf->use_cts_prot)
1485                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1486         else
1487                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1488
1489         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1490
1491         if (vif->type == NL80211_IFTYPE_AP ||
1492             vif->type == NL80211_IFTYPE_ADHOC) {
1493                 if (vif->bss_conf.enable_beacon) {
1494                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1495                         priv->beacon_ctx = ctx;
1496                 } else {
1497                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1498                         priv->beacon_ctx = NULL;
1499                 }
1500         }
1501
1502         /*
1503          * If the ucode decides to do beacon filtering before
1504          * association, it will lose beacons that are needed
1505          * before sending frames out on passive channels. This
1506          * causes association failures on those channels. Enable
1507          * receiving beacons in such cases.
1508          */
1509
1510         if (vif->type == NL80211_IFTYPE_STATION) {
1511                 if (!bss_conf->assoc)
1512                         ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1513                 else
1514                         ctx->staging.filter_flags &=
1515                                                     ~RXON_FILTER_BCON_AWARE_MSK;
1516         }
1517
1518         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1519                 iwlagn_commit_rxon(priv, ctx);
1520
1521         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1522                 /*
1523                  * The chain noise calibration will enable PM upon
1524                  * completion. If calibration has already been run
1525                  * then we need to enable power management here.
1526                  */
1527                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1528                         iwl_power_update_mode(priv, false);
1529
1530                 /* Enable RX differential gain and sensitivity calibrations */
1531                 iwlagn_chain_noise_reset(priv);
1532                 priv->start_calib = 1;
1533         }
1534
1535         if (changes & BSS_CHANGED_IBSS) {
1536                 ret = iwlagn_manage_ibss_station(priv, vif,
1537                                                  bss_conf->ibss_joined);
1538                 if (ret)
1539                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1540                                 bss_conf->ibss_joined ? "add" : "remove",
1541                                 bss_conf->bssid);
1542         }
1543
1544         if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {
1545                 if (iwlagn_update_beacon(priv, vif))
1546                         IWL_ERR(priv, "Error updating beacon\n");
1547         }
1548
1549         mutex_unlock(&priv->mutex);
1550 }
1551
1552 void iwlagn_post_scan(struct iwl_priv *priv)
1553 {
1554         struct iwl_rxon_context *ctx;
1555
1556         /*
1557          * We do not commit power settings while scan is pending,
1558          * do it now if the settings changed.
1559          */
1560         iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1561         iwl_set_tx_power(priv, priv->tx_power_next, false);
1562
1563         /*
1564          * Since setting the RXON may have been deferred while
1565          * performing the scan, fire one off if needed
1566          */
1567         for_each_context(priv, ctx)
1568                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1569                         iwlagn_commit_rxon(priv, ctx);
1570
1571         iwlagn_set_pan_params(priv);
1572 }