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