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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   5  * Copyright(c) 2015 Intel Deutschland GmbH
   6  *****************************************************************************/
   7
   8 #include <linux/etherdevice.h>
   9 #include "iwl-trans.h"
  10 #include "iwl-modparams.h"
  11 #include "dev.h"
  12 #include "agn.h"
  13 #include "calib.h"
  14
  15 /*
  16  * initialize rxon structure with default values from eeprom
  17  */
  18 void iwl_connection_init_rx_config(struct iwl_priv *priv,
  19                                    struct iwl_rxon_context *ctx)
  20 {
  21         memset(&ctx->staging, 0, sizeof(ctx->staging));
  22
  23         if (!ctx->vif) {
  24                 ctx->staging.dev_type = ctx->unused_devtype;
  25         } else
  26         switch (ctx->vif->type) {
  27         case NL80211_IFTYPE_AP:
  28                 ctx->staging.dev_type = ctx->ap_devtype;
  29                 break;
  30
  31         case NL80211_IFTYPE_STATION:
  32                 ctx->staging.dev_type = ctx->station_devtype;
  33                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
  34                 break;
  35
  36         case NL80211_IFTYPE_ADHOC:
  37                 ctx->staging.dev_type = ctx->ibss_devtype;
  38                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
  39                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
  40                                                   RXON_FILTER_ACCEPT_GRP_MSK;
  41                 break;
  42
  43         case NL80211_IFTYPE_MONITOR:
  44                 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
  45                 break;
  46
  47         default:
  48                 IWL_ERR(priv, "Unsupported interface type %d\n",
  49                         ctx->vif->type);
  50                 break;
  51         }
  52
  53 #if 0
  54         /* TODO:  Figure out when short_preamble would be set and cache from
  55          * that */
  56         if (!hw_to_local(priv->hw)->short_preamble)
  57                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
  58         else
  59                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
  60 #endif
  61
  62         ctx->staging.channel =
  63                 cpu_to_le16(priv->hw->conf.chandef.chan->hw_value);
  64         priv->band = priv->hw->conf.chandef.chan->band;
  65
  66         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
  67
  68         /* clear both MIX and PURE40 mode flag */
  69         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
  70                                         RXON_FLG_CHANNEL_MODE_PURE_40);
  71         if (ctx->vif)
  72                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
  73
  74         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
  75         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
  76         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
  77 }
  78
  79 static int iwlagn_disable_bss(struct iwl_priv *priv,
  80                               struct iwl_rxon_context *ctx,
  81                               struct iwl_rxon_cmd *send)
  82 {
  83         __le32 old_filter = send->filter_flags;
  84         int ret;
  85
  86         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  87         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
  88                                 0, sizeof(*send), send);
  89
  90         send->filter_flags = old_filter;
  91
  92         if (ret)
  93                 IWL_DEBUG_QUIET_RFKILL(priv,
  94                         "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
  95
  96         return ret;
  97 }
  98
  99 static int iwlagn_disable_pan(struct iwl_priv *priv,
 100                               struct iwl_rxon_context *ctx,
 101                               struct iwl_rxon_cmd *send)
 102 {
 103         struct iwl_notification_wait disable_wait;
 104         __le32 old_filter = send->filter_flags;
 105         u8 old_dev_type = send->dev_type;
 106         int ret;
 107         static const u16 deactivate_cmd[] = {
 108                 REPLY_WIPAN_DEACTIVATION_COMPLETE
 109         };
 110
 111         iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
 112                                    deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
 113                                    NULL, NULL);
 114
 115         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 116         send->dev_type = RXON_DEV_TYPE_P2P;
 117         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
 118                                 0, sizeof(*send), send);
 119
 120         send->filter_flags = old_filter;
 121         send->dev_type = old_dev_type;
 122
 123         if (ret) {
 124                 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
 125                 iwl_remove_notification(&priv->notif_wait, &disable_wait);
 126         } else {
 127                 ret = iwl_wait_notification(&priv->notif_wait,
 128                                             &disable_wait, HZ);
 129                 if (ret)
 130                         IWL_ERR(priv, "Timed out waiting for PAN disable\n");
 131         }
 132
 133         return ret;
 134 }
 135
 136 static int iwlagn_disconn_pan(struct iwl_priv *priv,
 137                               struct iwl_rxon_context *ctx,
 138                               struct iwl_rxon_cmd *send)
 139 {
 140         __le32 old_filter = send->filter_flags;
 141         int ret;
 142
 143         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 144         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
 145                                 sizeof(*send), send);
 146
 147         send->filter_flags = old_filter;
 148
 149         return ret;
 150 }
 151
 152 static void iwlagn_update_qos(struct iwl_priv *priv,
 153                               struct iwl_rxon_context *ctx)
 154 {
 155         int ret;
 156
 157         if (!ctx->is_active)
 158                 return;
 159
 160         ctx->qos_data.def_qos_parm.qos_flags = 0;
 161
 162         if (ctx->qos_data.qos_active)
 163                 ctx->qos_data.def_qos_parm.qos_flags |=
 164                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 165
 166         if (ctx->ht.enabled)
 167                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 168
 169         IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 170                       ctx->qos_data.qos_active,
 171                       ctx->qos_data.def_qos_parm.qos_flags);
 172
 173         ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0,
 174                                sizeof(struct iwl_qosparam_cmd),
 175                                &ctx->qos_data.def_qos_parm);
 176         if (ret)
 177                 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
 178 }
 179
 180 static int iwlagn_update_beacon(struct iwl_priv *priv,
 181                                 struct ieee80211_vif *vif)
 182 {
 183         lockdep_assert_held(&priv->mutex);
 184
 185         dev_kfree_skb(priv->beacon_skb);
 186         priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif, 0);
 187         if (!priv->beacon_skb)
 188                 return -ENOMEM;
 189         return iwlagn_send_beacon_cmd(priv);
 190 }
 191
 192 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
 193                                   struct iwl_rxon_context *ctx)
 194 {
 195         int ret = 0;
 196         struct iwl_rxon_assoc_cmd rxon_assoc;
 197         const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
 198         const struct iwl_rxon_cmd *rxon2 = &ctx->active;
 199
 200         if ((rxon1->flags == rxon2->flags) &&
 201             (rxon1->filter_flags == rxon2->filter_flags) &&
 202             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 203             (rxon1->ofdm_ht_single_stream_basic_rates ==
 204              rxon2->ofdm_ht_single_stream_basic_rates) &&
 205             (rxon1->ofdm_ht_dual_stream_basic_rates ==
 206              rxon2->ofdm_ht_dual_stream_basic_rates) &&
 207             (rxon1->ofdm_ht_triple_stream_basic_rates ==
 208              rxon2->ofdm_ht_triple_stream_basic_rates) &&
 209             (rxon1->acquisition_data == rxon2->acquisition_data) &&
 210             (rxon1->rx_chain == rxon2->rx_chain) &&
 211             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 212                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
 213                 return 0;
 214         }
 215
 216         rxon_assoc.flags = ctx->staging.flags;
 217         rxon_assoc.filter_flags = ctx->staging.filter_flags;
 218         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
 219         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
 220         rxon_assoc.reserved1 = 0;
 221         rxon_assoc.reserved2 = 0;
 222         rxon_assoc.reserved3 = 0;
 223         rxon_assoc.ofdm_ht_single_stream_basic_rates =
 224             ctx->staging.ofdm_ht_single_stream_basic_rates;
 225         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 226             ctx->staging.ofdm_ht_dual_stream_basic_rates;
 227         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
 228         rxon_assoc.ofdm_ht_triple_stream_basic_rates =
 229                  ctx->staging.ofdm_ht_triple_stream_basic_rates;
 230         rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
 231
 232         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
 233                                 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
 234         return ret;
 235 }
 236
 237 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 238 {
 239         u16 new_val;
 240         u16 beacon_factor;
 241
 242         /*
 243          * If mac80211 hasn't given us a beacon interval, program
 244          * the default into the device (not checking this here
 245          * would cause the adjustment below to return the maximum
 246          * value, which may break PAN.)
 247          */
 248         if (!beacon_val)
 249                 return DEFAULT_BEACON_INTERVAL;
 250
 251         /*
 252          * If the beacon interval we obtained from the peer
 253          * is too large, we'll have to wake up more often
 254          * (and in IBSS case, we'll beacon too much)
 255          *
 256          * For example, if max_beacon_val is 4096, and the
 257          * requested beacon interval is 7000, we'll have to
 258          * use 3500 to be able to wake up on the beacons.
 259          *
 260          * This could badly influence beacon detection stats.
 261          */
 262
 263         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 264         new_val = beacon_val / beacon_factor;
 265
 266         if (!new_val)
 267                 new_val = max_beacon_val;
 268
 269         return new_val;
 270 }
 271
 272 static int iwl_send_rxon_timing(struct iwl_priv *priv,
 273                                 struct iwl_rxon_context *ctx)
 274 {
 275         u64 tsf;
 276         s32 interval_tm, rem;
 277         struct ieee80211_conf *conf = NULL;
 278         u16 beacon_int;
 279         struct ieee80211_vif *vif = ctx->vif;
 280
 281         conf = &priv->hw->conf;
 282
 283         lockdep_assert_held(&priv->mutex);
 284
 285         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 286
 287         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 288         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 289
 290         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 291
 292         /*
 293          * TODO: For IBSS we need to get atim_window from mac80211,
 294          *       for now just always use 0
 295          */
 296         ctx->timing.atim_window = 0;
 297
 298         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 299             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 300             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 301             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 302             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 303                 ctx->timing.beacon_interval =
 304                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 305                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 306         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 307                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 308                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 309                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 310                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 311                     !ctx->vif->bss_conf.beacon_int)) {
 312                 ctx->timing.beacon_interval =
 313                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 314                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 315         } else {
 316                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 317                         IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 318                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 319         }
 320
 321         ctx->beacon_int = beacon_int;
 322
 323         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 324         interval_tm = beacon_int * TIME_UNIT;
 325         rem = do_div(tsf, interval_tm);
 326         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 327
 328         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 329
 330         IWL_DEBUG_ASSOC(priv,
 331                         "beacon interval %d beacon timer %d beacon tim %d\n",
 332                         le16_to_cpu(ctx->timing.beacon_interval),
 333                         le32_to_cpu(ctx->timing.beacon_init_val),
 334                         le16_to_cpu(ctx->timing.atim_window));
 335
 336         return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 337                                 0, sizeof(ctx->timing), &ctx->timing);
 338 }
 339
 340 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
 341                                struct iwl_rxon_context *ctx)
 342 {
 343         int ret;
 344         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 345
 346         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 347                 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 348         } else {
 349                 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 350                 if (ret)
 351                         return ret;
 352                 if (ctx->vif) {
 353                         ret = iwl_send_rxon_timing(priv, ctx);
 354                         if (ret) {
 355                                 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 356                                 return ret;
 357                         }
 358                         ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
 359                 }
 360         }
 361         if (ret)
 362                 return ret;
 363
 364         /*
 365          * Un-assoc RXON clears the station table and WEP
 366          * keys, so we have to restore those afterwards.
 367          */
 368         iwl_clear_ucode_stations(priv, ctx);
 369         /* update -- might need P2P now */
 370         iwl_update_bcast_station(priv, ctx);
 371         iwl_restore_stations(priv, ctx);
 372         ret = iwl_restore_default_wep_keys(priv, ctx);
 373         if (ret) {
 374                 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 375                 return ret;
 376         }
 377
 378         memcpy(active, &ctx->staging, sizeof(*active));
 379         return 0;
 380 }
 381
 382 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 383 {
 384         int ret;
 385         s8 prev_tx_power;
 386         bool defer;
 387         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 388
 389         if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
 390                 return 0;
 391
 392         lockdep_assert_held(&priv->mutex);
 393
 394         if (priv->tx_power_user_lmt == tx_power && !force)
 395                 return 0;
 396
 397         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
 398                 IWL_WARN(priv,
 399                          "Requested user TXPOWER %d below lower limit %d.\n",
 400                          tx_power,
 401                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
 402                 return -EINVAL;
 403         }
 404
 405         if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
 406                 IWL_WARN(priv,
 407                         "Requested user TXPOWER %d above upper limit %d.\n",
 408                          tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
 409                 return -EINVAL;
 410         }
 411
 412         if (!iwl_is_ready_rf(priv))
 413                 return -EIO;
 414
 415         /* scan complete and commit_rxon use tx_power_next value,
 416          * it always need to be updated for newest request */
 417         priv->tx_power_next = tx_power;
 418
 419         /* do not set tx power when scanning or channel changing */
 420         defer = test_bit(STATUS_SCANNING, &priv->status) ||
 421                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
 422         if (defer && !force) {
 423                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
 424                 return 0;
 425         }
 426
 427         prev_tx_power = priv->tx_power_user_lmt;
 428         priv->tx_power_user_lmt = tx_power;
 429
 430         ret = iwlagn_send_tx_power(priv);
 431
 432         /* if fail to set tx_power, restore the orig. tx power */
 433         if (ret) {
 434                 priv->tx_power_user_lmt = prev_tx_power;
 435                 priv->tx_power_next = prev_tx_power;
 436         }
 437         return ret;
 438 }
 439
 440 static int iwlagn_rxon_connect(struct iwl_priv *priv,
 441                                struct iwl_rxon_context *ctx)
 442 {
 443         int ret;
 444         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 445
 446         /* RXON timing must be before associated RXON */
 447         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 448                 ret = iwl_send_rxon_timing(priv, ctx);
 449                 if (ret) {
 450                         IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 451                         return ret;
 452                 }
 453         }
 454         /* QoS info may be cleared by previous un-assoc RXON */
 455         iwlagn_update_qos(priv, ctx);
 456
 457         /*
 458          * We'll run into this code path when beaconing is
 459          * enabled, but then we also need to send the beacon
 460          * to the device.
 461          */
 462         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 463                 ret = iwlagn_update_beacon(priv, ctx->vif);
 464                 if (ret) {
 465                         IWL_ERR(priv,
 466                                 "Error sending required beacon (%d)!\n",
 467                                 ret);
 468                         return ret;
 469                 }
 470         }
 471
 472         priv->start_calib = 0;
 473         /*
 474          * Apply the new configuration.
 475          *
 476          * Associated RXON doesn't clear the station table in uCode,
 477          * so we don't need to restore stations etc. after this.
 478          */
 479         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
 480                       sizeof(struct iwl_rxon_cmd), &ctx->staging);
 481         if (ret) {
 482                 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 483                 return ret;
 484         }
 485         memcpy(active, &ctx->staging, sizeof(*active));
 486
 487         /* IBSS beacon needs to be sent after setting assoc */
 488         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 489                 if (iwlagn_update_beacon(priv, ctx->vif))
 490                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 491         iwl_init_sensitivity(priv);
 492
 493         /*
 494          * If we issue a new RXON command which required a tune then
 495          * we must send a new TXPOWER command or we won't be able to
 496          * Tx any frames.
 497          *
 498          * It's expected we set power here if channel is changing.
 499          */
 500         ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 501         if (ret) {
 502                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 503                 return ret;
 504         }
 505
 506         return 0;
 507 }
 508
 509 int iwlagn_set_pan_params(struct iwl_priv *priv)
 510 {
 511         struct iwl_wipan_params_cmd cmd;
 512         struct iwl_rxon_context *ctx_bss, *ctx_pan;
 513         int slot0 = 300, slot1 = 0;
 514         int ret;
 515
 516         if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
 517                 return 0;
 518
 519         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 520
 521         lockdep_assert_held(&priv->mutex);
 522
 523         ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
 524         ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
 525
 526         /*
 527          * If the PAN context is inactive, then we don't need
 528          * to update the PAN parameters, the last thing we'll
 529          * have done before it goes inactive is making the PAN
 530          * parameters be WLAN-only.
 531          */
 532         if (!ctx_pan->is_active)
 533                 return 0;
 534
 535         memset(&cmd, 0, sizeof(cmd));
 536
 537         /* only 2 slots are currently allowed */
 538         cmd.num_slots = 2;
 539
 540         cmd.slots[0].type = 0; /* BSS */
 541         cmd.slots[1].type = 1; /* PAN */
 542
 543         if (ctx_bss->vif && ctx_pan->vif) {
 544                 int bcnint = ctx_pan->beacon_int;
 545                 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
 546
 547                 /* should be set, but seems unused?? */
 548                 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
 549
 550                 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
 551                     bcnint &&
 552                     bcnint != ctx_bss->beacon_int) {
 553                         IWL_ERR(priv,
 554                                 "beacon intervals don't match (%d, %d)\n",
 555                                 ctx_bss->beacon_int, ctx_pan->beacon_int);
 556                 } else
 557                         bcnint = max_t(int, bcnint,
 558                                        ctx_bss->beacon_int);
 559                 if (!bcnint)
 560                         bcnint = DEFAULT_BEACON_INTERVAL;
 561                 slot0 = bcnint / 2;
 562                 slot1 = bcnint - slot0;
 563
 564                 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
 565                     (!ctx_bss->vif->cfg.idle &&
 566                      !ctx_bss->vif->cfg.assoc)) {
 567                         slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 568                         slot1 = IWL_MIN_SLOT_TIME;
 569                 } else if (!ctx_pan->vif->cfg.idle &&
 570                            !ctx_pan->vif->cfg.assoc) {
 571                         slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 572                         slot0 = IWL_MIN_SLOT_TIME;
 573                 }
 574         } else if (ctx_pan->vif) {
 575                 slot0 = 0;
 576                 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
 577                                         ctx_pan->beacon_int;
 578                 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
 579
 580                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
 581                         slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
 582                         slot1 = IWL_MIN_SLOT_TIME;
 583                 }
 584         }
 585
 586         cmd.slots[0].width = cpu_to_le16(slot0);
 587         cmd.slots[1].width = cpu_to_le16(slot1);
 588
 589         ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0,
 590                         sizeof(cmd), &cmd);
 591         if (ret)
 592                 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
 593
 594         return ret;
 595 }
 596
 597 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 598                              struct iwl_ht_config *ht_conf,
 599                              struct iwl_rxon_context *ctx)
 600 {
 601         struct iwl_rxon_cmd *rxon = &ctx->staging;
 602
 603         if (!ctx->ht.enabled) {
 604                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 605                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 606                         RXON_FLG_HT40_PROT_MSK |
 607                         RXON_FLG_HT_PROT_MSK);
 608                 return;
 609         }
 610
 611         /* FIXME: if the definition of ht.protection changed, the "translation"
 612          * will be needed for rxon->flags
 613          */
 614         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
 615                                    RXON_FLG_HT_OPERATING_MODE_POS);
 616
 617         /* Set up channel bandwidth:
 618          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 619         /* clear the HT channel mode before set the mode */
 620         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 621                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 622         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 623                 /* pure ht40 */
 624                 if (ctx->ht.protection ==
 625                     IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 626                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 627                         /*
 628                          * Note: control channel is opposite of extension
 629                          * channel
 630                          */
 631                         switch (ctx->ht.extension_chan_offset) {
 632                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 633                                 rxon->flags &=
 634                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 635                                 break;
 636                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 637                                 rxon->flags |=
 638                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 639                                 break;
 640                         }
 641                 } else {
 642                         /*
 643                          * Note: control channel is opposite of extension
 644                          * channel
 645                          */
 646                         switch (ctx->ht.extension_chan_offset) {
 647                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 648                                 rxon->flags &=
 649                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 650                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 651                                 break;
 652                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 653                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 654                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 655                                 break;
 656                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 657                         default:
 658                                 /*
 659                                  * channel location only valid if in Mixed
 660                                  * mode
 661                                  */
 662                                 IWL_ERR(priv,
 663                                         "invalid extension channel offset\n");
 664                                 break;
 665                         }
 666                 }
 667         } else {
 668                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 669         }
 670
 671         iwlagn_set_rxon_chain(priv, ctx);
 672
 673         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 674                         "extension channel offset 0x%x\n",
 675                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 676                         ctx->ht.extension_chan_offset);
 677 }
 678
 679 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 680 {
 681         struct iwl_rxon_context *ctx;
 682
 683         for_each_context(priv, ctx)
 684                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 685 }
 686
 687 /*
 688  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 689  * @ch: requested channel as a pointer to struct ieee80211_channel
 690
 691  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 692  * in the staging RXON flag structure based on the ch->band
 693  */
 694 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 695                          struct iwl_rxon_context *ctx)
 696 {
 697         enum nl80211_band band = ch->band;
 698         u16 channel = ch->hw_value;
 699
 700         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 701             (priv->band == band))
 702                 return;
 703
 704         ctx->staging.channel = cpu_to_le16(channel);
 705         if (band == NL80211_BAND_5GHZ)
 706                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 707         else
 708                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 709
 710         priv->band = band;
 711
 712         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 713
 714 }
 715
 716 void iwl_set_flags_for_band(struct iwl_priv *priv,
 717                             struct iwl_rxon_context *ctx,
 718                             enum nl80211_band band,
 719                             struct ieee80211_vif *vif)
 720 {
 721         if (band == NL80211_BAND_5GHZ) {
 722                 ctx->staging.flags &=
 723                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 724                       | RXON_FLG_CCK_MSK);
 725                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 726         } else {
 727                 /* Copied from iwl_post_associate() */
 728                 if (vif && vif->bss_conf.use_short_slot)
 729                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 730                 else
 731                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 732
 733                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 734                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 735                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 736         }
 737 }
 738
 739 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
 740                                   struct iwl_rxon_context *ctx, int hw_decrypt)
 741 {
 742         struct iwl_rxon_cmd *rxon = &ctx->staging;
 743
 744         if (hw_decrypt)
 745                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 746         else
 747                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 748
 749 }
 750
 751 /* validate RXON structure is valid */
 752 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
 753                               struct iwl_rxon_context *ctx)
 754 {
 755         struct iwl_rxon_cmd *rxon = &ctx->staging;
 756         u32 errors = 0;
 757
 758         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 759                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 760                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 761                         errors |= BIT(0);
 762                 }
 763                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 764                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 765                         errors |= BIT(1);
 766                 }
 767         } else {
 768                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 769                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 770                         errors |= BIT(2);
 771                 }
 772                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 773                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 774                         errors |= BIT(3);
 775                 }
 776         }
 777         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 778                 IWL_WARN(priv, "mac/bssid mcast!\n");
 779                 errors |= BIT(4);
 780         }
 781
 782         /* make sure basic rates 6Mbps and 1Mbps are supported */
 783         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 784             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 785                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 786                 errors |= BIT(5);
 787         }
 788
 789         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 790                 IWL_WARN(priv, "aid > 2007\n");
 791                 errors |= BIT(6);
 792         }
 793
 794         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 795                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 796                 IWL_WARN(priv, "CCK and short slot\n");
 797                 errors |= BIT(7);
 798         }
 799
 800         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 801                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 802                 IWL_WARN(priv, "CCK and auto detect\n");
 803                 errors |= BIT(8);
 804         }
 805
 806         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 807                             RXON_FLG_TGG_PROTECT_MSK)) ==
 808                             RXON_FLG_TGG_PROTECT_MSK) {
 809                 IWL_WARN(priv, "TGg but no auto-detect\n");
 810                 errors |= BIT(9);
 811         }
 812
 813         if (rxon->channel == 0) {
 814                 IWL_WARN(priv, "zero channel is invalid\n");
 815                 errors |= BIT(10);
 816         }
 817
 818         WARN(errors, "Invalid RXON (%#x), channel %d",
 819              errors, le16_to_cpu(rxon->channel));
 820
 821         return errors ? -EINVAL : 0;
 822 }
 823
 824 /*
 825  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 826  * @priv: staging_rxon is compared to active_rxon
 827  *
 828  * If the RXON structure is changing enough to require a new tune,
 829  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 830  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 831  */
 832 static int iwl_full_rxon_required(struct iwl_priv *priv,
 833                                   struct iwl_rxon_context *ctx)
 834 {
 835         const struct iwl_rxon_cmd *staging = &ctx->staging;
 836         const struct iwl_rxon_cmd *active = &ctx->active;
 837
 838 #define CHK(cond)                                                       \
 839         if ((cond)) {                                                   \
 840                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 841                 return 1;                                               \
 842         }
 843
 844 #define CHK_NEQ(c1, c2)                                         \
 845         if ((c1) != (c2)) {                                     \
 846                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 847                                #c1 " != " #c2 " - %d != %d\n",  \
 848                                (c1), (c2));                     \
 849                 return 1;                                       \
 850         }
 851
 852         /* These items are only settable from the full RXON command */
 853         CHK(!iwl_is_associated_ctx(ctx));
 854         CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
 855         CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
 856         CHK(!ether_addr_equal(staging->wlap_bssid_addr,
 857                               active->wlap_bssid_addr));
 858         CHK_NEQ(staging->dev_type, active->dev_type);
 859         CHK_NEQ(staging->channel, active->channel);
 860         CHK_NEQ(staging->air_propagation, active->air_propagation);
 861         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 862                 active->ofdm_ht_single_stream_basic_rates);
 863         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 864                 active->ofdm_ht_dual_stream_basic_rates);
 865         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 866                 active->ofdm_ht_triple_stream_basic_rates);
 867         CHK_NEQ(staging->assoc_id, active->assoc_id);
 868
 869         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 870          * be updated with the RXON_ASSOC command -- however only some
 871          * flag transitions are allowed using RXON_ASSOC */
 872
 873         /* Check if we are not switching bands */
 874         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 875                 active->flags & RXON_FLG_BAND_24G_MSK);
 876
 877         /* Check if we are switching association toggle */
 878         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 879                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 880
 881 #undef CHK
 882 #undef CHK_NEQ
 883
 884         return 0;
 885 }
 886
 887 #ifdef CONFIG_IWLWIFI_DEBUG
 888 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 889                              enum iwl_rxon_context_id ctxid)
 890 {
 891         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 892         struct iwl_rxon_cmd *rxon = &ctx->staging;
 893
 894         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 895         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 896         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
 897                         le16_to_cpu(rxon->channel));
 898         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
 899                         le32_to_cpu(rxon->flags));
 900         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 901                         le32_to_cpu(rxon->filter_flags));
 902         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 903         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 904                         rxon->ofdm_basic_rates);
 905         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
 906                         rxon->cck_basic_rates);
 907         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 908         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 909         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
 910                         le16_to_cpu(rxon->assoc_id));
 911 }
 912 #endif
 913
 914 static void iwl_calc_basic_rates(struct iwl_priv *priv,
 915                                  struct iwl_rxon_context *ctx)
 916 {
 917         int lowest_present_ofdm = 100;
 918         int lowest_present_cck = 100;
 919         u8 cck = 0;
 920         u8 ofdm = 0;
 921
 922         if (ctx->vif) {
 923                 struct ieee80211_supported_band *sband;
 924                 unsigned long basic = ctx->vif->bss_conf.basic_rates;
 925                 int i;
 926
 927                 sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band];
 928
 929                 for_each_set_bit(i, &basic, BITS_PER_LONG) {
 930                         int hw = sband->bitrates[i].hw_value;
 931                         if (hw >= IWL_FIRST_OFDM_RATE) {
 932                                 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 933                                 if (lowest_present_ofdm > hw)
 934                                         lowest_present_ofdm = hw;
 935                         } else {
 936                                 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 937
 938                                 cck |= BIT(hw);
 939                                 if (lowest_present_cck > hw)
 940                                         lowest_present_cck = hw;
 941                         }
 942                 }
 943         }
 944
 945         /*
 946          * Now we've got the basic rates as bitmaps in the ofdm and cck
 947          * variables. This isn't sufficient though, as there might not
 948          * be all the right rates in the bitmap. E.g. if the only basic
 949          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 950          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 951          *
 952          *    [...] a STA responding to a received frame shall transmit
 953          *    its Control Response frame [...] at the highest rate in the
 954          *    BSSBasicRateSet parameter that is less than or equal to the
 955          *    rate of the immediately previous frame in the frame exchange
 956          *    sequence ([...]) and that is of the same modulation class
 957          *    ([...]) as the received frame. If no rate contained in the
 958          *    BSSBasicRateSet parameter meets these conditions, then the
 959          *    control frame sent in response to a received frame shall be
 960          *    transmitted at the highest mandatory rate of the PHY that is
 961          *    less than or equal to the rate of the received frame, and
 962          *    that is of the same modulation class as the received frame.
 963          *
 964          * As a consequence, we need to add all mandatory rates that are
 965          * lower than all of the basic rates to these bitmaps.
 966          */
 967
 968         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 969                 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
 970         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 971                 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
 972         /* 6M already there or needed so always add */
 973         ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
 974
 975         /*
 976          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 977          * Note, however:
 978          *  - if no CCK rates are basic, it must be ERP since there must
 979          *    be some basic rates at all, so they're OFDM => ERP PHY
 980          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 981          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 982          *  - if 5.5M is basic, 1M and 2M are mandatory
 983          *  - if 2M is basic, 1M is mandatory
 984          *  - if 1M is basic, that's the only valid ACK rate.
 985          * As a consequence, it's not as complicated as it sounds, just add
 986          * any lower rates to the ACK rate bitmap.
 987          */
 988         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 989                 cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
 990         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 991                 cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
 992         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 993                 cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
 994         /* 1M already there or needed so always add */
 995         cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
 996
 997         IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
 998                        cck, ofdm);
 999
1000         /* "basic_rates" is a misnomer here -- should be called ACK rates */
1001         ctx->staging.cck_basic_rates = cck;
1002         ctx->staging.ofdm_basic_rates = ofdm;
1003 }
1004
1005 /*
1006  * iwlagn_commit_rxon - commit staging_rxon to hardware
1007  *
1008  * The RXON command in staging_rxon is committed to the hardware and
1009  * the active_rxon structure is updated with the new data.  This
1010  * function correctly transitions out of the RXON_ASSOC_MSK state if
1011  * a HW tune is required based on the RXON structure changes.
1012  *
1013  * The connect/disconnect flow should be as the following:
1014  *
1015  * 1. make sure send RXON command with association bit unset if not connect
1016  *      this should include the channel and the band for the candidate
1017  *      to be connected to
1018  * 2. Add Station before RXON association with the AP
1019  * 3. RXON_timing has to send before RXON for connection
1020  * 4. full RXON command - associated bit set
1021  * 5. use RXON_ASSOC command to update any flags changes
1022  */
1023 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1024 {
1025         /* cast away the const for active_rxon in this function */
1026         struct iwl_rxon_cmd *active = (void *)&ctx->active;
1027         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1028         int ret;
1029
1030         lockdep_assert_held(&priv->mutex);
1031
1032         if (!iwl_is_alive(priv))
1033                 return -EBUSY;
1034
1035         /* This function hardcodes a bunch of dual-mode assumptions */
1036         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1037
1038         if (!ctx->is_active)
1039                 return 0;
1040
1041         /* always get timestamp with Rx frame */
1042         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1043
1044         /* recalculate basic rates */
1045         iwl_calc_basic_rates(priv, ctx);
1046
1047         /*
1048          * force CTS-to-self frames protection if RTS-CTS is not preferred
1049          * one aggregation protection method
1050          */
1051         if (!priv->hw_params.use_rts_for_aggregation)
1052                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1053
1054         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1055             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1056                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1057         else
1058                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1059
1060         iwl_print_rx_config_cmd(priv, ctx->ctxid);
1061         ret = iwl_check_rxon_cmd(priv, ctx);
1062         if (ret) {
1063                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1064                 return -EINVAL;
1065         }
1066
1067         /*
1068          * receive commit_rxon request
1069          * abort any previous channel switch if still in process
1070          */
1071         if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1072             (priv->switch_channel != ctx->staging.channel)) {
1073                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1074                               le16_to_cpu(priv->switch_channel));
1075                 iwl_chswitch_done(priv, false);
1076         }
1077
1078         /*
1079          * If we don't need to send a full RXON, we can use
1080          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1081          * and other flags for the current radio configuration.
1082          */
1083         if (!iwl_full_rxon_required(priv, ctx)) {
1084                 ret = iwlagn_send_rxon_assoc(priv, ctx);
1085                 if (ret) {
1086                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1087                         return ret;
1088                 }
1089
1090                 memcpy(active, &ctx->staging, sizeof(*active));
1091                 /*
1092                  * We do not commit tx power settings while channel changing,
1093                  * do it now if after settings changed.
1094                  */
1095                 iwl_set_tx_power(priv, priv->tx_power_next, false);
1096
1097                 /* make sure we are in the right PS state */
1098                 iwl_power_update_mode(priv, true);
1099
1100                 return 0;
1101         }
1102
1103         iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.swcrypto);
1104
1105         IWL_DEBUG_INFO(priv,
1106                        "Going to commit RXON\n"
1107                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
1108                        "  * channel = %d\n"
1109                        "  * bssid = %pM\n",
1110                        (new_assoc ? "" : "out"),
1111                        le16_to_cpu(ctx->staging.channel),
1112                        ctx->staging.bssid_addr);
1113
1114         /*
1115          * Always clear associated first, but with the correct config.
1116          * This is required as for example station addition for the
1117          * AP station must be done after the BSSID is set to correctly
1118          * set up filters in the device.
1119          */
1120         ret = iwlagn_rxon_disconn(priv, ctx);
1121         if (ret)
1122                 return ret;
1123
1124         ret = iwlagn_set_pan_params(priv);
1125         if (ret)
1126                 return ret;
1127
1128         if (new_assoc)
1129                 return iwlagn_rxon_connect(priv, ctx);
1130
1131         return 0;
1132 }
1133
1134 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1135                         struct iwl_rxon_context *ctx)
1136 {
1137         if (conf_is_ht40_minus(conf)) {
1138                 ctx->ht.extension_chan_offset =
1139                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1140                 ctx->ht.is_40mhz = true;
1141         } else if (conf_is_ht40_plus(conf)) {
1142                 ctx->ht.extension_chan_offset =
1143                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1144                 ctx->ht.is_40mhz = true;
1145         } else {
1146                 ctx->ht.extension_chan_offset =
1147                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
1148                 ctx->ht.is_40mhz = false;
1149         }
1150 }
1151
1152 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1153 {
1154         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1155         struct iwl_rxon_context *ctx;
1156         struct ieee80211_conf *conf = &hw->conf;
1157         struct ieee80211_channel *channel = conf->chandef.chan;
1158         int ret = 0;
1159
1160         IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1161
1162         mutex_lock(&priv->mutex);
1163
1164         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1165                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1166                 goto out;
1167         }
1168
1169         if (!iwl_is_ready(priv)) {
1170                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1171                 goto out;
1172         }
1173
1174         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1175                        IEEE80211_CONF_CHANGE_CHANNEL)) {
1176                 /* mac80211 uses static for non-HT which is what we want */
1177                 priv->current_ht_config.smps = conf->smps_mode;
1178
1179                 /*
1180                  * Recalculate chain counts.
1181                  *
1182                  * If monitor mode is enabled then mac80211 will
1183                  * set up the SM PS mode to OFF if an HT channel is
1184                  * configured.
1185                  */
1186                 for_each_context(priv, ctx)
1187                         iwlagn_set_rxon_chain(priv, ctx);
1188         }
1189
1190         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1191                 for_each_context(priv, ctx) {
1192                         /* Configure HT40 channels */
1193                         if (ctx->ht.enabled != conf_is_ht(conf))
1194                                 ctx->ht.enabled = conf_is_ht(conf);
1195
1196                         if (ctx->ht.enabled) {
1197                                 /* if HT40 is used, it should not change
1198                                  * after associated except channel switch */
1199                                 if (!ctx->ht.is_40mhz ||
1200                                                 !iwl_is_associated_ctx(ctx))
1201                                         iwlagn_config_ht40(conf, ctx);
1202                         } else
1203                                 ctx->ht.is_40mhz = false;
1204
1205                         /*
1206                          * Default to no protection. Protection mode will
1207                          * later be set from BSS config in iwl_ht_conf
1208                          */
1209                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1210
1211                         /* if we are switching from ht to 2.4 clear flags
1212                          * from any ht related info since 2.4 does not
1213                          * support ht */
1214                         if (le16_to_cpu(ctx->staging.channel) !=
1215                             channel->hw_value)
1216                                 ctx->staging.flags = 0;
1217
1218                         iwl_set_rxon_channel(priv, channel, ctx);
1219                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1220
1221                         iwl_set_flags_for_band(priv, ctx, channel->band,
1222                                                ctx->vif);
1223                 }
1224
1225                 iwl_update_bcast_stations(priv);
1226         }
1227
1228         if (changed & (IEEE80211_CONF_CHANGE_PS |
1229                         IEEE80211_CONF_CHANGE_IDLE)) {
1230                 ret = iwl_power_update_mode(priv, false);
1231                 if (ret)
1232                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1233         }
1234
1235         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1236                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1237                         priv->tx_power_user_lmt, conf->power_level);
1238
1239                 iwl_set_tx_power(priv, conf->power_level, false);
1240         }
1241
1242         for_each_context(priv, ctx) {
1243                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1244                         continue;
1245                 iwlagn_commit_rxon(priv, ctx);
1246         }
1247  out:
1248         mutex_unlock(&priv->mutex);
1249         IWL_DEBUG_MAC80211(priv, "leave\n");
1250
1251         return ret;
1252 }
1253
1254 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1255                                        struct iwl_rxon_context *ctx,
1256                                        struct ieee80211_bss_conf *bss_conf)
1257 {
1258         struct ieee80211_vif *vif = ctx->vif;
1259         struct iwl_rxon_context *tmp;
1260         struct ieee80211_sta *sta;
1261         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1262         struct ieee80211_sta_ht_cap *ht_cap;
1263         bool need_multiple;
1264
1265         lockdep_assert_held(&priv->mutex);
1266
1267         switch (vif->type) {
1268         case NL80211_IFTYPE_STATION:
1269                 rcu_read_lock();
1270                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1271                 if (!sta) {
1272                         /*
1273                          * If at all, this can only happen through a race
1274                          * when the AP disconnects us while we're still
1275                          * setting up the connection, in that case mac80211
1276                          * will soon tell us about that.
1277                          */
1278                         need_multiple = false;
1279                         rcu_read_unlock();
1280                         break;
1281                 }
1282
1283                 ht_cap = &sta->deflink.ht_cap;
1284
1285                 need_multiple = true;
1286
1287                 /*
1288                  * If the peer advertises no support for receiving 2 and 3
1289                  * stream MCS rates, it can't be transmitting them either.
1290                  */
1291                 if (ht_cap->mcs.rx_mask[1] == 0 &&
1292                     ht_cap->mcs.rx_mask[2] == 0) {
1293                         need_multiple = false;
1294                 } else if (!(ht_cap->mcs.tx_params &
1295                                                 IEEE80211_HT_MCS_TX_DEFINED)) {
1296                         /* If it can't TX MCS at all ... */
1297                         need_multiple = false;
1298                 } else if (ht_cap->mcs.tx_params &
1299                                                 IEEE80211_HT_MCS_TX_RX_DIFF) {
1300                         int maxstreams;
1301
1302                         /*
1303                          * But if it can receive them, it might still not
1304                          * be able to transmit them, which is what we need
1305                          * to check here -- so check the number of streams
1306                          * it advertises for TX (if different from RX).
1307                          */
1308
1309                         maxstreams = (ht_cap->mcs.tx_params &
1310                                  IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1311                         maxstreams >>=
1312                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1313                         maxstreams += 1;
1314
1315                         if (maxstreams <= 1)
1316                                 need_multiple = false;
1317                 }
1318
1319                 rcu_read_unlock();
1320                 break;
1321         case NL80211_IFTYPE_ADHOC:
1322                 /* currently */
1323                 need_multiple = false;
1324                 break;
1325         default:
1326                 /* only AP really */
1327                 need_multiple = true;
1328                 break;
1329         }
1330
1331         ctx->ht_need_multiple_chains = need_multiple;
1332
1333         if (!need_multiple) {
1334                 /* check all contexts */
1335                 for_each_context(priv, tmp) {
1336                         if (!tmp->vif)
1337                                 continue;
1338                         if (tmp->ht_need_multiple_chains) {
1339                                 need_multiple = true;
1340                                 break;
1341                         }
1342                 }
1343         }
1344
1345         ht_conf->single_chain_sufficient = !need_multiple;
1346 }
1347
1348 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1349 {
1350         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1351         int ret;
1352
1353         if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)
1354                 return;
1355
1356         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1357             iwl_is_any_associated(priv)) {
1358                 struct iwl_calib_chain_noise_reset_cmd cmd;
1359
1360                 /* clear data for chain noise calibration algorithm */
1361                 data->chain_noise_a = 0;
1362                 data->chain_noise_b = 0;
1363                 data->chain_noise_c = 0;
1364                 data->chain_signal_a = 0;
1365                 data->chain_signal_b = 0;
1366                 data->chain_signal_c = 0;
1367                 data->beacon_count = 0;
1368
1369                 memset(&cmd, 0, sizeof(cmd));
1370                 iwl_set_calib_hdr(&cmd.hdr,
1371                         priv->phy_calib_chain_noise_reset_cmd);
1372                 ret = iwl_dvm_send_cmd_pdu(priv,
1373                                         REPLY_PHY_CALIBRATION_CMD,
1374                                         0, sizeof(cmd), &cmd);
1375                 if (ret)
1376                         IWL_ERR(priv,
1377                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1378                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1379                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1380         }
1381 }
1382
1383 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1384                              struct ieee80211_vif *vif,
1385                              struct ieee80211_bss_conf *bss_conf,
1386                              u64 changes)
1387 {
1388         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1389         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1390         int ret;
1391         bool force = false;
1392
1393         mutex_lock(&priv->mutex);
1394
1395         if (changes & BSS_CHANGED_IDLE && vif->cfg.idle) {
1396                 /*
1397                  * If we go idle, then clearly no "passive-no-rx"
1398                  * workaround is needed any more, this is a reset.
1399                  */
1400                 iwlagn_lift_passive_no_rx(priv);
1401         }
1402
1403         if (unlikely(!iwl_is_ready(priv))) {
1404                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1405                 mutex_unlock(&priv->mutex);
1406                 return;
1407         }
1408
1409         if (unlikely(!ctx->vif)) {
1410                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1411                 mutex_unlock(&priv->mutex);
1412                 return;
1413         }
1414
1415         if (changes & BSS_CHANGED_BEACON_INT)
1416                 force = true;
1417
1418         if (changes & BSS_CHANGED_QOS) {
1419                 ctx->qos_data.qos_active = bss_conf->qos;
1420                 iwlagn_update_qos(priv, ctx);
1421         }
1422
1423         ctx->staging.assoc_id = cpu_to_le16(vif->cfg.aid);
1424         if (vif->bss_conf.use_short_preamble)
1425                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1426         else
1427                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1428
1429         if (changes & BSS_CHANGED_ASSOC) {
1430                 if (vif->cfg.assoc) {
1431                         priv->timestamp = bss_conf->sync_tsf;
1432                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1433                 } else {
1434                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1435
1436                         if (ctx->ctxid == IWL_RXON_CTX_BSS)
1437                                 priv->have_rekey_data = false;
1438                 }
1439
1440                 iwlagn_bt_coex_rssi_monitor(priv);
1441         }
1442
1443         if (ctx->ht.enabled) {
1444                 ctx->ht.protection = bss_conf->ht_operation_mode &
1445                                         IEEE80211_HT_OP_MODE_PROTECTION;
1446                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1447                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1448                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1449                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1450         }
1451
1452         iwlagn_set_rxon_chain(priv, ctx);
1453
1454         if (bss_conf->use_cts_prot && (priv->band != NL80211_BAND_5GHZ))
1455                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1456         else
1457                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1458
1459         if (bss_conf->use_cts_prot)
1460                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1461         else
1462                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1463
1464         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1465
1466         if (vif->type == NL80211_IFTYPE_AP ||
1467             vif->type == NL80211_IFTYPE_ADHOC) {
1468                 if (vif->bss_conf.enable_beacon) {
1469                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1470                         priv->beacon_ctx = ctx;
1471                 } else {
1472                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1473                         priv->beacon_ctx = NULL;
1474                 }
1475         }
1476
1477         /*
1478          * If the ucode decides to do beacon filtering before
1479          * association, it will lose beacons that are needed
1480          * before sending frames out on passive channels. This
1481          * causes association failures on those channels. Enable
1482          * receiving beacons in such cases.
1483          */
1484
1485         if (vif->type == NL80211_IFTYPE_STATION) {
1486                 if (!vif->cfg.assoc)
1487                         ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1488                 else
1489                         ctx->staging.filter_flags &=
1490                                                     ~RXON_FILTER_BCON_AWARE_MSK;
1491         }
1492
1493         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1494                 iwlagn_commit_rxon(priv, ctx);
1495
1496         if (changes & BSS_CHANGED_ASSOC && vif->cfg.assoc) {
1497                 /*
1498                  * The chain noise calibration will enable PM upon
1499                  * completion. If calibration has already been run
1500                  * then we need to enable power management here.
1501                  */
1502                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1503                         iwl_power_update_mode(priv, false);
1504
1505                 /* Enable RX differential gain and sensitivity calibrations */
1506                 iwlagn_chain_noise_reset(priv);
1507                 priv->start_calib = 1;
1508         }
1509
1510         if (changes & BSS_CHANGED_IBSS) {
1511                 ret = iwlagn_manage_ibss_station(priv, vif,
1512                                                  vif->cfg.ibss_joined);
1513                 if (ret)
1514                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1515                                 vif->cfg.ibss_joined ? "add" : "remove",
1516                                 bss_conf->bssid);
1517         }
1518
1519         if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {
1520                 if (iwlagn_update_beacon(priv, vif))
1521                         IWL_ERR(priv, "Error updating beacon\n");
1522         }
1523
1524         mutex_unlock(&priv->mutex);
1525 }
1526
1527 void iwlagn_post_scan(struct iwl_priv *priv)
1528 {
1529         struct iwl_rxon_context *ctx;
1530
1531         /*
1532          * We do not commit power settings while scan is pending,
1533          * do it now if the settings changed.
1534          */
1535         iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1536         iwl_set_tx_power(priv, priv->tx_power_next, false);
1537
1538         /*
1539          * Since setting the RXON may have been deferred while
1540          * performing the scan, fire one off if needed
1541          */
1542         for_each_context(priv, ctx)
1543                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1544                         iwlagn_commit_rxon(priv, ctx);
1545
1546         iwlagn_set_pan_params(priv);
1547 }