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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * Intel Linux Wireless <ilw@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include <linux/etherdevice.h>
  28 #include "iwl-dev.h"
  29 #include "iwl-agn.h"
  30 #include "iwl-agn-calib.h"
  31 #include "iwl-trans.h"
  32 #include "iwl-modparams.h"
  33
  34 /*
  35  * initialize rxon structure with default values from eeprom
  36  */
  37 void iwl_connection_init_rx_config(struct iwl_priv *priv,
  38                                    struct iwl_rxon_context *ctx)
  39 {
  40         const struct iwl_channel_info *ch_info;
  41
  42         memset(&ctx->staging, 0, sizeof(ctx->staging));
  43
  44         if (!ctx->vif) {
  45                 ctx->staging.dev_type = ctx->unused_devtype;
  46         } else
  47         switch (ctx->vif->type) {
  48         case NL80211_IFTYPE_AP:
  49                 ctx->staging.dev_type = ctx->ap_devtype;
  50                 break;
  51
  52         case NL80211_IFTYPE_STATION:
  53                 ctx->staging.dev_type = ctx->station_devtype;
  54                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
  55                 break;
  56
  57         case NL80211_IFTYPE_ADHOC:
  58                 ctx->staging.dev_type = ctx->ibss_devtype;
  59                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
  60                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
  61                                                   RXON_FILTER_ACCEPT_GRP_MSK;
  62                 break;
  63
  64         case NL80211_IFTYPE_MONITOR:
  65                 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
  66                 break;
  67
  68         default:
  69                 IWL_ERR(priv, "Unsupported interface type %d\n",
  70                         ctx->vif->type);
  71                 break;
  72         }
  73
  74 #if 0
  75         /* TODO:  Figure out when short_preamble would be set and cache from
  76          * that */
  77         if (!hw_to_local(priv->hw)->short_preamble)
  78                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
  79         else
  80                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
  81 #endif
  82
  83         ch_info = iwl_get_channel_info(priv, priv->band,
  84                                        le16_to_cpu(ctx->active.channel));
  85
  86         if (!ch_info)
  87                 ch_info = &priv->channel_info[0];
  88
  89         ctx->staging.channel = cpu_to_le16(ch_info->channel);
  90         priv->band = ch_info->band;
  91
  92         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
  93
  94         /* clear both MIX and PURE40 mode flag */
  95         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
  96                                         RXON_FLG_CHANNEL_MODE_PURE_40);
  97         if (ctx->vif)
  98                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
  99
 100         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
 101         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
 102         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
 103 }
 104
 105 static int iwlagn_disable_bss(struct iwl_priv *priv,
 106                               struct iwl_rxon_context *ctx,
 107                               struct iwl_rxon_cmd *send)
 108 {
 109         __le32 old_filter = send->filter_flags;
 110         int ret;
 111
 112         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 113         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
 114                                 CMD_SYNC, sizeof(*send), send);
 115
 116         send->filter_flags = old_filter;
 117
 118         if (ret)
 119                 IWL_DEBUG_QUIET_RFKILL(priv,
 120                         "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
 121
 122         return ret;
 123 }
 124
 125 static int iwlagn_disable_pan(struct iwl_priv *priv,
 126                               struct iwl_rxon_context *ctx,
 127                               struct iwl_rxon_cmd *send)
 128 {
 129         struct iwl_notification_wait disable_wait;
 130         __le32 old_filter = send->filter_flags;
 131         u8 old_dev_type = send->dev_type;
 132         int ret;
 133         static const u8 deactivate_cmd[] = {
 134                 REPLY_WIPAN_DEACTIVATION_COMPLETE
 135         };
 136
 137         iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
 138                                    deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
 139                                    NULL, NULL);
 140
 141         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 142         send->dev_type = RXON_DEV_TYPE_P2P;
 143         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
 144                                 CMD_SYNC, sizeof(*send), send);
 145
 146         send->filter_flags = old_filter;
 147         send->dev_type = old_dev_type;
 148
 149         if (ret) {
 150                 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
 151                 iwl_remove_notification(&priv->notif_wait, &disable_wait);
 152         } else {
 153                 ret = iwl_wait_notification(&priv->notif_wait,
 154                                             &disable_wait, HZ);
 155                 if (ret)
 156                         IWL_ERR(priv, "Timed out waiting for PAN disable\n");
 157         }
 158
 159         return ret;
 160 }
 161
 162 static int iwlagn_disconn_pan(struct iwl_priv *priv,
 163                               struct iwl_rxon_context *ctx,
 164                               struct iwl_rxon_cmd *send)
 165 {
 166         __le32 old_filter = send->filter_flags;
 167         int ret;
 168
 169         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 170         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
 171                                 sizeof(*send), send);
 172
 173         send->filter_flags = old_filter;
 174
 175         return ret;
 176 }
 177
 178 void iwlagn_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 179 {
 180         int ret;
 181
 182         if (!ctx->is_active)
 183                 return;
 184
 185         ctx->qos_data.def_qos_parm.qos_flags = 0;
 186
 187         if (ctx->qos_data.qos_active)
 188                 ctx->qos_data.def_qos_parm.qos_flags |=
 189                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 190
 191         if (ctx->ht.enabled)
 192                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 193
 194         IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 195                       ctx->qos_data.qos_active,
 196                       ctx->qos_data.def_qos_parm.qos_flags);
 197
 198         ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC,
 199                                sizeof(struct iwl_qosparam_cmd),
 200                                &ctx->qos_data.def_qos_parm);
 201         if (ret)
 202                 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
 203 }
 204
 205 int iwlagn_update_beacon(struct iwl_priv *priv,
 206                          struct ieee80211_vif *vif)
 207 {
 208         lockdep_assert_held(&priv->mutex);
 209
 210         dev_kfree_skb(priv->beacon_skb);
 211         priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
 212         if (!priv->beacon_skb)
 213                 return -ENOMEM;
 214         return iwlagn_send_beacon_cmd(priv);
 215 }
 216
 217 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
 218                            struct iwl_rxon_context *ctx)
 219 {
 220         int ret = 0;
 221         struct iwl_rxon_assoc_cmd rxon_assoc;
 222         const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
 223         const struct iwl_rxon_cmd *rxon2 = &ctx->active;
 224
 225         if ((rxon1->flags == rxon2->flags) &&
 226             (rxon1->filter_flags == rxon2->filter_flags) &&
 227             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 228             (rxon1->ofdm_ht_single_stream_basic_rates ==
 229              rxon2->ofdm_ht_single_stream_basic_rates) &&
 230             (rxon1->ofdm_ht_dual_stream_basic_rates ==
 231              rxon2->ofdm_ht_dual_stream_basic_rates) &&
 232             (rxon1->ofdm_ht_triple_stream_basic_rates ==
 233              rxon2->ofdm_ht_triple_stream_basic_rates) &&
 234             (rxon1->acquisition_data == rxon2->acquisition_data) &&
 235             (rxon1->rx_chain == rxon2->rx_chain) &&
 236             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 237                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
 238                 return 0;
 239         }
 240
 241         rxon_assoc.flags = ctx->staging.flags;
 242         rxon_assoc.filter_flags = ctx->staging.filter_flags;
 243         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
 244         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
 245         rxon_assoc.reserved1 = 0;
 246         rxon_assoc.reserved2 = 0;
 247         rxon_assoc.reserved3 = 0;
 248         rxon_assoc.ofdm_ht_single_stream_basic_rates =
 249             ctx->staging.ofdm_ht_single_stream_basic_rates;
 250         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 251             ctx->staging.ofdm_ht_dual_stream_basic_rates;
 252         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
 253         rxon_assoc.ofdm_ht_triple_stream_basic_rates =
 254                  ctx->staging.ofdm_ht_triple_stream_basic_rates;
 255         rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
 256
 257         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
 258                                 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
 259         return ret;
 260 }
 261
 262 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 263 {
 264         u16 new_val;
 265         u16 beacon_factor;
 266
 267         /*
 268          * If mac80211 hasn't given us a beacon interval, program
 269          * the default into the device (not checking this here
 270          * would cause the adjustment below to return the maximum
 271          * value, which may break PAN.)
 272          */
 273         if (!beacon_val)
 274                 return DEFAULT_BEACON_INTERVAL;
 275
 276         /*
 277          * If the beacon interval we obtained from the peer
 278          * is too large, we'll have to wake up more often
 279          * (and in IBSS case, we'll beacon too much)
 280          *
 281          * For example, if max_beacon_val is 4096, and the
 282          * requested beacon interval is 7000, we'll have to
 283          * use 3500 to be able to wake up on the beacons.
 284          *
 285          * This could badly influence beacon detection stats.
 286          */
 287
 288         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 289         new_val = beacon_val / beacon_factor;
 290
 291         if (!new_val)
 292                 new_val = max_beacon_val;
 293
 294         return new_val;
 295 }
 296
 297 static int iwl_send_rxon_timing(struct iwl_priv *priv,
 298                                 struct iwl_rxon_context *ctx)
 299 {
 300         u64 tsf;
 301         s32 interval_tm, rem;
 302         struct ieee80211_conf *conf = NULL;
 303         u16 beacon_int;
 304         struct ieee80211_vif *vif = ctx->vif;
 305
 306         conf = &priv->hw->conf;
 307
 308         lockdep_assert_held(&priv->mutex);
 309
 310         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 311
 312         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 313         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 314
 315         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 316
 317         /*
 318          * TODO: For IBSS we need to get atim_window from mac80211,
 319          *       for now just always use 0
 320          */
 321         ctx->timing.atim_window = 0;
 322
 323         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 324             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 325             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 326             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 327             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 328                 ctx->timing.beacon_interval =
 329                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 330                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 331         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 332                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 333                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 334                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 335                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 336                     !ctx->vif->bss_conf.beacon_int)) {
 337                 ctx->timing.beacon_interval =
 338                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 339                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 340         } else {
 341                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 342                         IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 343                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 344         }
 345
 346         ctx->beacon_int = beacon_int;
 347
 348         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 349         interval_tm = beacon_int * TIME_UNIT;
 350         rem = do_div(tsf, interval_tm);
 351         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 352
 353         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 354
 355         IWL_DEBUG_ASSOC(priv,
 356                         "beacon interval %d beacon timer %d beacon tim %d\n",
 357                         le16_to_cpu(ctx->timing.beacon_interval),
 358                         le32_to_cpu(ctx->timing.beacon_init_val),
 359                         le16_to_cpu(ctx->timing.atim_window));
 360
 361         return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 362                                 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
 363 }
 364
 365 static int iwlagn_rxon_disconn(struct iwl_priv *priv,
 366                                struct iwl_rxon_context *ctx)
 367 {
 368         int ret;
 369         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 370
 371         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 372                 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 373         } else {
 374                 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 375                 if (ret)
 376                         return ret;
 377                 if (ctx->vif) {
 378                         ret = iwl_send_rxon_timing(priv, ctx);
 379                         if (ret) {
 380                                 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 381                                 return ret;
 382                         }
 383                         ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
 384                 }
 385         }
 386         if (ret)
 387                 return ret;
 388
 389         /*
 390          * Un-assoc RXON clears the station table and WEP
 391          * keys, so we have to restore those afterwards.
 392          */
 393         iwl_clear_ucode_stations(priv, ctx);
 394         /* update -- might need P2P now */
 395         iwl_update_bcast_station(priv, ctx);
 396         iwl_restore_stations(priv, ctx);
 397         ret = iwl_restore_default_wep_keys(priv, ctx);
 398         if (ret) {
 399                 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 400                 return ret;
 401         }
 402
 403         memcpy(active, &ctx->staging, sizeof(*active));
 404         return 0;
 405 }
 406
 407 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 408 {
 409         int ret;
 410         s8 prev_tx_power;
 411         bool defer;
 412         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 413
 414         if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
 415                 return 0;
 416
 417         lockdep_assert_held(&priv->mutex);
 418
 419         if (priv->tx_power_user_lmt == tx_power && !force)
 420                 return 0;
 421
 422         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
 423                 IWL_WARN(priv,
 424                          "Requested user TXPOWER %d below lower limit %d.\n",
 425                          tx_power,
 426                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
 427                 return -EINVAL;
 428         }
 429
 430         if (tx_power > priv->tx_power_device_lmt) {
 431                 IWL_WARN(priv,
 432                         "Requested user TXPOWER %d above upper limit %d.\n",
 433                          tx_power, priv->tx_power_device_lmt);
 434                 return -EINVAL;
 435         }
 436
 437         if (!iwl_is_ready_rf(priv))
 438                 return -EIO;
 439
 440         /* scan complete and commit_rxon use tx_power_next value,
 441          * it always need to be updated for newest request */
 442         priv->tx_power_next = tx_power;
 443
 444         /* do not set tx power when scanning or channel changing */
 445         defer = test_bit(STATUS_SCANNING, &priv->status) ||
 446                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
 447         if (defer && !force) {
 448                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
 449                 return 0;
 450         }
 451
 452         prev_tx_power = priv->tx_power_user_lmt;
 453         priv->tx_power_user_lmt = tx_power;
 454
 455         ret = iwlagn_send_tx_power(priv);
 456
 457         /* if fail to set tx_power, restore the orig. tx power */
 458         if (ret) {
 459                 priv->tx_power_user_lmt = prev_tx_power;
 460                 priv->tx_power_next = prev_tx_power;
 461         }
 462         return ret;
 463 }
 464
 465 static int iwlagn_rxon_connect(struct iwl_priv *priv,
 466                                struct iwl_rxon_context *ctx)
 467 {
 468         int ret;
 469         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 470
 471         /* RXON timing must be before associated RXON */
 472         if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 473                 ret = iwl_send_rxon_timing(priv, ctx);
 474                 if (ret) {
 475                         IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 476                         return ret;
 477                 }
 478         }
 479         /* QoS info may be cleared by previous un-assoc RXON */
 480         iwlagn_update_qos(priv, ctx);
 481
 482         /*
 483          * We'll run into this code path when beaconing is
 484          * enabled, but then we also need to send the beacon
 485          * to the device.
 486          */
 487         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 488                 ret = iwlagn_update_beacon(priv, ctx->vif);
 489                 if (ret) {
 490                         IWL_ERR(priv,
 491                                 "Error sending required beacon (%d)!\n",
 492                                 ret);
 493                         return ret;
 494                 }
 495         }
 496
 497         priv->start_calib = 0;
 498         /*
 499          * Apply the new configuration.
 500          *
 501          * Associated RXON doesn't clear the station table in uCode,
 502          * so we don't need to restore stations etc. after this.
 503          */
 504         ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC,
 505                       sizeof(struct iwl_rxon_cmd), &ctx->staging);
 506         if (ret) {
 507                 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 508                 return ret;
 509         }
 510         memcpy(active, &ctx->staging, sizeof(*active));
 511
 512         /* IBSS beacon needs to be sent after setting assoc */
 513         if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 514                 if (iwlagn_update_beacon(priv, ctx->vif))
 515                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 516         iwl_init_sensitivity(priv);
 517
 518         /*
 519          * If we issue a new RXON command which required a tune then
 520          * we must send a new TXPOWER command or we won't be able to
 521          * Tx any frames.
 522          *
 523          * It's expected we set power here if channel is changing.
 524          */
 525         ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 526         if (ret) {
 527                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 528                 return ret;
 529         }
 530
 531         if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
 532             priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
 533                 ieee80211_request_smps(ctx->vif,
 534                                        priv->cfg->ht_params->smps_mode);
 535
 536         return 0;
 537 }
 538
 539 int iwlagn_set_pan_params(struct iwl_priv *priv)
 540 {
 541         struct iwl_wipan_params_cmd cmd;
 542         struct iwl_rxon_context *ctx_bss, *ctx_pan;
 543         int slot0 = 300, slot1 = 0;
 544         int ret;
 545
 546         if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
 547                 return 0;
 548
 549         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 550
 551         lockdep_assert_held(&priv->mutex);
 552
 553         ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
 554         ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
 555
 556         /*
 557          * If the PAN context is inactive, then we don't need
 558          * to update the PAN parameters, the last thing we'll
 559          * have done before it goes inactive is making the PAN
 560          * parameters be WLAN-only.
 561          */
 562         if (!ctx_pan->is_active)
 563                 return 0;
 564
 565         memset(&cmd, 0, sizeof(cmd));
 566
 567         /* only 2 slots are currently allowed */
 568         cmd.num_slots = 2;
 569
 570         cmd.slots[0].type = 0; /* BSS */
 571         cmd.slots[1].type = 1; /* PAN */
 572
 573         if (priv->hw_roc_setup) {
 574                 /* both contexts must be used for this to happen */
 575                 slot1 = IWL_MIN_SLOT_TIME;
 576                 slot0 = 3000;
 577         } else if (ctx_bss->vif && ctx_pan->vif) {
 578                 int bcnint = ctx_pan->beacon_int;
 579                 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
 580
 581                 /* should be set, but seems unused?? */
 582                 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
 583
 584                 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
 585                     bcnint &&
 586                     bcnint != ctx_bss->beacon_int) {
 587                         IWL_ERR(priv,
 588                                 "beacon intervals don't match (%d, %d)\n",
 589                                 ctx_bss->beacon_int, ctx_pan->beacon_int);
 590                 } else
 591                         bcnint = max_t(int, bcnint,
 592                                        ctx_bss->beacon_int);
 593                 if (!bcnint)
 594                         bcnint = DEFAULT_BEACON_INTERVAL;
 595                 slot0 = bcnint / 2;
 596                 slot1 = bcnint - slot0;
 597
 598                 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
 599                     (!ctx_bss->vif->bss_conf.idle &&
 600                      !ctx_bss->vif->bss_conf.assoc)) {
 601                         slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 602                         slot1 = IWL_MIN_SLOT_TIME;
 603                 } else if (!ctx_pan->vif->bss_conf.idle &&
 604                            !ctx_pan->vif->bss_conf.assoc) {
 605                         slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 606                         slot0 = IWL_MIN_SLOT_TIME;
 607                 }
 608         } else if (ctx_pan->vif) {
 609                 slot0 = 0;
 610                 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
 611                                         ctx_pan->beacon_int;
 612                 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
 613
 614                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
 615                         slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
 616                         slot1 = IWL_MIN_SLOT_TIME;
 617                 }
 618         }
 619
 620         cmd.slots[0].width = cpu_to_le16(slot0);
 621         cmd.slots[1].width = cpu_to_le16(slot1);
 622
 623         ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC,
 624                         sizeof(cmd), &cmd);
 625         if (ret)
 626                 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
 627
 628         return ret;
 629 }
 630
 631 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 632                              struct iwl_ht_config *ht_conf,
 633                              struct iwl_rxon_context *ctx)
 634 {
 635         struct iwl_rxon_cmd *rxon = &ctx->staging;
 636
 637         if (!ctx->ht.enabled) {
 638                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 639                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 640                         RXON_FLG_HT40_PROT_MSK |
 641                         RXON_FLG_HT_PROT_MSK);
 642                 return;
 643         }
 644
 645         /* FIXME: if the definition of ht.protection changed, the "translation"
 646          * will be needed for rxon->flags
 647          */
 648         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
 649                                    RXON_FLG_HT_OPERATING_MODE_POS);
 650
 651         /* Set up channel bandwidth:
 652          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 653         /* clear the HT channel mode before set the mode */
 654         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 655                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 656         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 657                 /* pure ht40 */
 658                 if (ctx->ht.protection ==
 659                     IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 660                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 661                         /*
 662                          * Note: control channel is opposite of extension
 663                          * channel
 664                          */
 665                         switch (ctx->ht.extension_chan_offset) {
 666                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 667                                 rxon->flags &=
 668                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 669                                 break;
 670                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 671                                 rxon->flags |=
 672                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 673                                 break;
 674                         }
 675                 } else {
 676                         /*
 677                          * Note: control channel is opposite of extension
 678                          * channel
 679                          */
 680                         switch (ctx->ht.extension_chan_offset) {
 681                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 682                                 rxon->flags &=
 683                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 684                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 685                                 break;
 686                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 687                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 688                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 689                                 break;
 690                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 691                         default:
 692                                 /*
 693                                  * channel location only valid if in Mixed
 694                                  * mode
 695                                  */
 696                                 IWL_ERR(priv,
 697                                         "invalid extension channel offset\n");
 698                                 break;
 699                         }
 700                 }
 701         } else {
 702                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 703         }
 704
 705         iwlagn_set_rxon_chain(priv, ctx);
 706
 707         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 708                         "extension channel offset 0x%x\n",
 709                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 710                         ctx->ht.extension_chan_offset);
 711 }
 712
 713 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 714 {
 715         struct iwl_rxon_context *ctx;
 716
 717         for_each_context(priv, ctx)
 718                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 719 }
 720
 721 /**
 722  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 723  * @ch: requested channel as a pointer to struct ieee80211_channel
 724
 725  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 726  * in the staging RXON flag structure based on the ch->band
 727  */
 728 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 729                          struct iwl_rxon_context *ctx)
 730 {
 731         enum ieee80211_band band = ch->band;
 732         u16 channel = ch->hw_value;
 733
 734         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 735             (priv->band == band))
 736                 return;
 737
 738         ctx->staging.channel = cpu_to_le16(channel);
 739         if (band == IEEE80211_BAND_5GHZ)
 740                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 741         else
 742                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 743
 744         priv->band = band;
 745
 746         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 747
 748 }
 749
 750 void iwl_set_flags_for_band(struct iwl_priv *priv,
 751                             struct iwl_rxon_context *ctx,
 752                             enum ieee80211_band band,
 753                             struct ieee80211_vif *vif)
 754 {
 755         if (band == IEEE80211_BAND_5GHZ) {
 756                 ctx->staging.flags &=
 757                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 758                       | RXON_FLG_CCK_MSK);
 759                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 760         } else {
 761                 /* Copied from iwl_post_associate() */
 762                 if (vif && vif->bss_conf.use_short_slot)
 763                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 764                 else
 765                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 766
 767                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 768                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 769                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 770         }
 771 }
 772
 773 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
 774                                   struct iwl_rxon_context *ctx, int hw_decrypt)
 775 {
 776         struct iwl_rxon_cmd *rxon = &ctx->staging;
 777
 778         if (hw_decrypt)
 779                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 780         else
 781                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 782
 783 }
 784
 785 /* validate RXON structure is valid */
 786 static int iwl_check_rxon_cmd(struct iwl_priv *priv,
 787                               struct iwl_rxon_context *ctx)
 788 {
 789         struct iwl_rxon_cmd *rxon = &ctx->staging;
 790         u32 errors = 0;
 791
 792         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 793                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 794                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 795                         errors |= BIT(0);
 796                 }
 797                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 798                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 799                         errors |= BIT(1);
 800                 }
 801         } else {
 802                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 803                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 804                         errors |= BIT(2);
 805                 }
 806                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 807                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 808                         errors |= BIT(3);
 809                 }
 810         }
 811         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 812                 IWL_WARN(priv, "mac/bssid mcast!\n");
 813                 errors |= BIT(4);
 814         }
 815
 816         /* make sure basic rates 6Mbps and 1Mbps are supported */
 817         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 818             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 819                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 820                 errors |= BIT(5);
 821         }
 822
 823         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 824                 IWL_WARN(priv, "aid > 2007\n");
 825                 errors |= BIT(6);
 826         }
 827
 828         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 829                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 830                 IWL_WARN(priv, "CCK and short slot\n");
 831                 errors |= BIT(7);
 832         }
 833
 834         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 835                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 836                 IWL_WARN(priv, "CCK and auto detect");
 837                 errors |= BIT(8);
 838         }
 839
 840         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 841                             RXON_FLG_TGG_PROTECT_MSK)) ==
 842                             RXON_FLG_TGG_PROTECT_MSK) {
 843                 IWL_WARN(priv, "TGg but no auto-detect\n");
 844                 errors |= BIT(9);
 845         }
 846
 847         if (rxon->channel == 0) {
 848                 IWL_WARN(priv, "zero channel is invalid\n");
 849                 errors |= BIT(10);
 850         }
 851
 852         WARN(errors, "Invalid RXON (%#x), channel %d",
 853              errors, le16_to_cpu(rxon->channel));
 854
 855         return errors ? -EINVAL : 0;
 856 }
 857
 858 /**
 859  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 860  * @priv: staging_rxon is compared to active_rxon
 861  *
 862  * If the RXON structure is changing enough to require a new tune,
 863  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 864  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 865  */
 866 int iwl_full_rxon_required(struct iwl_priv *priv,
 867                            struct iwl_rxon_context *ctx)
 868 {
 869         const struct iwl_rxon_cmd *staging = &ctx->staging;
 870         const struct iwl_rxon_cmd *active = &ctx->active;
 871
 872 #define CHK(cond)                                                       \
 873         if ((cond)) {                                                   \
 874                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 875                 return 1;                                               \
 876         }
 877
 878 #define CHK_NEQ(c1, c2)                                         \
 879         if ((c1) != (c2)) {                                     \
 880                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 881                                #c1 " != " #c2 " - %d != %d\n",  \
 882                                (c1), (c2));                     \
 883                 return 1;                                       \
 884         }
 885
 886         /* These items are only settable from the full RXON command */
 887         CHK(!iwl_is_associated_ctx(ctx));
 888         CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
 889         CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
 890         CHK(!ether_addr_equal(staging->wlap_bssid_addr,
 891                               active->wlap_bssid_addr));
 892         CHK_NEQ(staging->dev_type, active->dev_type);
 893         CHK_NEQ(staging->channel, active->channel);
 894         CHK_NEQ(staging->air_propagation, active->air_propagation);
 895         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 896                 active->ofdm_ht_single_stream_basic_rates);
 897         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 898                 active->ofdm_ht_dual_stream_basic_rates);
 899         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 900                 active->ofdm_ht_triple_stream_basic_rates);
 901         CHK_NEQ(staging->assoc_id, active->assoc_id);
 902
 903         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 904          * be updated with the RXON_ASSOC command -- however only some
 905          * flag transitions are allowed using RXON_ASSOC */
 906
 907         /* Check if we are not switching bands */
 908         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 909                 active->flags & RXON_FLG_BAND_24G_MSK);
 910
 911         /* Check if we are switching association toggle */
 912         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 913                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 914
 915 #undef CHK
 916 #undef CHK_NEQ
 917
 918         return 0;
 919 }
 920
 921 #ifdef CONFIG_IWLWIFI_DEBUG
 922 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 923                              enum iwl_rxon_context_id ctxid)
 924 {
 925         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 926         struct iwl_rxon_cmd *rxon = &ctx->staging;
 927
 928         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 929         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 930         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
 931                         le16_to_cpu(rxon->channel));
 932         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
 933                         le32_to_cpu(rxon->flags));
 934         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 935                         le32_to_cpu(rxon->filter_flags));
 936         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 937         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 938                         rxon->ofdm_basic_rates);
 939         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
 940                         rxon->cck_basic_rates);
 941         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 942         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 943         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
 944                         le16_to_cpu(rxon->assoc_id));
 945 }
 946 #endif
 947
 948 static void iwl_calc_basic_rates(struct iwl_priv *priv,
 949                                  struct iwl_rxon_context *ctx)
 950 {
 951         int lowest_present_ofdm = 100;
 952         int lowest_present_cck = 100;
 953         u8 cck = 0;
 954         u8 ofdm = 0;
 955
 956         if (ctx->vif) {
 957                 struct ieee80211_supported_band *sband;
 958                 unsigned long basic = ctx->vif->bss_conf.basic_rates;
 959                 int i;
 960
 961                 sband = priv->hw->wiphy->bands[priv->hw->conf.channel->band];
 962
 963                 for_each_set_bit(i, &basic, BITS_PER_LONG) {
 964                         int hw = sband->bitrates[i].hw_value;
 965                         if (hw >= IWL_FIRST_OFDM_RATE) {
 966                                 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 967                                 if (lowest_present_ofdm > hw)
 968                                         lowest_present_ofdm = hw;
 969                         } else {
 970                                 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 971
 972                                 cck |= BIT(hw);
 973                                 if (lowest_present_cck > hw)
 974                                         lowest_present_cck = hw;
 975                         }
 976                 }
 977         }
 978
 979         /*
 980          * Now we've got the basic rates as bitmaps in the ofdm and cck
 981          * variables. This isn't sufficient though, as there might not
 982          * be all the right rates in the bitmap. E.g. if the only basic
 983          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 984          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 985          *
 986          *    [...] a STA responding to a received frame shall transmit
 987          *    its Control Response frame [...] at the highest rate in the
 988          *    BSSBasicRateSet parameter that is less than or equal to the
 989          *    rate of the immediately previous frame in the frame exchange
 990          *    sequence ([...]) and that is of the same modulation class
 991          *    ([...]) as the received frame. If no rate contained in the
 992          *    BSSBasicRateSet parameter meets these conditions, then the
 993          *    control frame sent in response to a received frame shall be
 994          *    transmitted at the highest mandatory rate of the PHY that is
 995          *    less than or equal to the rate of the received frame, and
 996          *    that is of the same modulation class as the received frame.
 997          *
 998          * As a consequence, we need to add all mandatory rates that are
 999          * lower than all of the basic rates to these bitmaps.
1000          */
1001
1002         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
1003                 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
1004         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
1005                 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
1006         /* 6M already there or needed so always add */
1007         ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
1008
1009         /*
1010          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
1011          * Note, however:
1012          *  - if no CCK rates are basic, it must be ERP since there must
1013          *    be some basic rates at all, so they're OFDM => ERP PHY
1014          *    (or we're in 5 GHz, and the cck bitmap will never be used)
1015          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
1016          *  - if 5.5M is basic, 1M and 2M are mandatory
1017          *  - if 2M is basic, 1M is mandatory
1018          *  - if 1M is basic, that's the only valid ACK rate.
1019          * As a consequence, it's not as complicated as it sounds, just add
1020          * any lower rates to the ACK rate bitmap.
1021          */
1022         if (IWL_RATE_11M_INDEX < lowest_present_ofdm)
1023                 ofdm |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
1024         if (IWL_RATE_5M_INDEX < lowest_present_ofdm)
1025                 ofdm |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
1026         if (IWL_RATE_2M_INDEX < lowest_present_ofdm)
1027                 ofdm |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
1028         /* 1M already there or needed so always add */
1029         cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
1030
1031         IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
1032                        cck, ofdm);
1033
1034         /* "basic_rates" is a misnomer here -- should be called ACK rates */
1035         ctx->staging.cck_basic_rates = cck;
1036         ctx->staging.ofdm_basic_rates = ofdm;
1037 }
1038
1039 /**
1040  * iwlagn_commit_rxon - commit staging_rxon to hardware
1041  *
1042  * The RXON command in staging_rxon is committed to the hardware and
1043  * the active_rxon structure is updated with the new data.  This
1044  * function correctly transitions out of the RXON_ASSOC_MSK state if
1045  * a HW tune is required based on the RXON structure changes.
1046  *
1047  * The connect/disconnect flow should be as the following:
1048  *
1049  * 1. make sure send RXON command with association bit unset if not connect
1050  *      this should include the channel and the band for the candidate
1051  *      to be connected to
1052  * 2. Add Station before RXON association with the AP
1053  * 3. RXON_timing has to send before RXON for connection
1054  * 4. full RXON command - associated bit set
1055  * 5. use RXON_ASSOC command to update any flags changes
1056  */
1057 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1058 {
1059         /* cast away the const for active_rxon in this function */
1060         struct iwl_rxon_cmd *active = (void *)&ctx->active;
1061         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1062         int ret;
1063
1064         lockdep_assert_held(&priv->mutex);
1065
1066         if (!iwl_is_alive(priv))
1067                 return -EBUSY;
1068
1069         /* This function hardcodes a bunch of dual-mode assumptions */
1070         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1071
1072         if (!ctx->is_active)
1073                 return 0;
1074
1075         /* always get timestamp with Rx frame */
1076         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1077
1078         /* recalculate basic rates */
1079         iwl_calc_basic_rates(priv, ctx);
1080
1081         /*
1082          * force CTS-to-self frames protection if RTS-CTS is not preferred
1083          * one aggregation protection method
1084          */
1085         if (!priv->hw_params.use_rts_for_aggregation)
1086                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1087
1088         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1089             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1090                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1091         else
1092                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1093
1094         iwl_print_rx_config_cmd(priv, ctx->ctxid);
1095         ret = iwl_check_rxon_cmd(priv, ctx);
1096         if (ret) {
1097                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1098                 return -EINVAL;
1099         }
1100
1101         /*
1102          * receive commit_rxon request
1103          * abort any previous channel switch if still in process
1104          */
1105         if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1106             (priv->switch_channel != ctx->staging.channel)) {
1107                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1108                               le16_to_cpu(priv->switch_channel));
1109                 iwl_chswitch_done(priv, false);
1110         }
1111
1112         /*
1113          * If we don't need to send a full RXON, we can use
1114          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1115          * and other flags for the current radio configuration.
1116          */
1117         if (!iwl_full_rxon_required(priv, ctx)) {
1118                 ret = iwlagn_send_rxon_assoc(priv, ctx);
1119                 if (ret) {
1120                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1121                         return ret;
1122                 }
1123
1124                 memcpy(active, &ctx->staging, sizeof(*active));
1125                 /*
1126                  * We do not commit tx power settings while channel changing,
1127                  * do it now if after settings changed.
1128                  */
1129                 iwl_set_tx_power(priv, priv->tx_power_next, false);
1130
1131                 /* make sure we are in the right PS state */
1132                 iwl_power_update_mode(priv, true);
1133
1134                 return 0;
1135         }
1136
1137         iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
1138
1139         IWL_DEBUG_INFO(priv,
1140                        "Going to commit RXON\n"
1141                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
1142                        "  * channel = %d\n"
1143                        "  * bssid = %pM\n",
1144                        (new_assoc ? "" : "out"),
1145                        le16_to_cpu(ctx->staging.channel),
1146                        ctx->staging.bssid_addr);
1147
1148         /*
1149          * Always clear associated first, but with the correct config.
1150          * This is required as for example station addition for the
1151          * AP station must be done after the BSSID is set to correctly
1152          * set up filters in the device.
1153          */
1154         ret = iwlagn_rxon_disconn(priv, ctx);
1155         if (ret)
1156                 return ret;
1157
1158         ret = iwlagn_set_pan_params(priv);
1159         if (ret)
1160                 return ret;
1161
1162         if (new_assoc)
1163                 return iwlagn_rxon_connect(priv, ctx);
1164
1165         return 0;
1166 }
1167
1168 void iwlagn_config_ht40(struct ieee80211_conf *conf,
1169         struct iwl_rxon_context *ctx)
1170 {
1171         if (conf_is_ht40_minus(conf)) {
1172                 ctx->ht.extension_chan_offset =
1173                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1174                 ctx->ht.is_40mhz = true;
1175         } else if (conf_is_ht40_plus(conf)) {
1176                 ctx->ht.extension_chan_offset =
1177                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1178                 ctx->ht.is_40mhz = true;
1179         } else {
1180                 ctx->ht.extension_chan_offset =
1181                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
1182                 ctx->ht.is_40mhz = false;
1183         }
1184 }
1185
1186 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1187 {
1188         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1189         struct iwl_rxon_context *ctx;
1190         struct ieee80211_conf *conf = &hw->conf;
1191         struct ieee80211_channel *channel = conf->channel;
1192         const struct iwl_channel_info *ch_info;
1193         int ret = 0;
1194
1195         IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1196
1197         mutex_lock(&priv->mutex);
1198
1199         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1200                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1201                 goto out;
1202         }
1203
1204         if (!iwl_is_ready(priv)) {
1205                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1206                 goto out;
1207         }
1208
1209         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1210                        IEEE80211_CONF_CHANGE_CHANNEL)) {
1211                 /* mac80211 uses static for non-HT which is what we want */
1212                 priv->current_ht_config.smps = conf->smps_mode;
1213
1214                 /*
1215                  * Recalculate chain counts.
1216                  *
1217                  * If monitor mode is enabled then mac80211 will
1218                  * set up the SM PS mode to OFF if an HT channel is
1219                  * configured.
1220                  */
1221                 for_each_context(priv, ctx)
1222                         iwlagn_set_rxon_chain(priv, ctx);
1223         }
1224
1225         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1226                 ch_info = iwl_get_channel_info(priv, channel->band,
1227                                                channel->hw_value);
1228                 if (!is_channel_valid(ch_info)) {
1229                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
1230                         ret = -EINVAL;
1231                         goto out;
1232                 }
1233
1234                 for_each_context(priv, ctx) {
1235                         /* Configure HT40 channels */
1236                         if (ctx->ht.enabled != conf_is_ht(conf))
1237                                 ctx->ht.enabled = conf_is_ht(conf);
1238
1239                         if (ctx->ht.enabled) {
1240                                 /* if HT40 is used, it should not change
1241                                  * after associated except channel switch */
1242                                 if (!ctx->ht.is_40mhz ||
1243                                                 !iwl_is_associated_ctx(ctx))
1244                                         iwlagn_config_ht40(conf, ctx);
1245                         } else
1246                                 ctx->ht.is_40mhz = false;
1247
1248                         /*
1249                          * Default to no protection. Protection mode will
1250                          * later be set from BSS config in iwl_ht_conf
1251                          */
1252                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1253
1254                         /* if we are switching from ht to 2.4 clear flags
1255                          * from any ht related info since 2.4 does not
1256                          * support ht */
1257                         if (le16_to_cpu(ctx->staging.channel) !=
1258                             channel->hw_value)
1259                                 ctx->staging.flags = 0;
1260
1261                         iwl_set_rxon_channel(priv, channel, ctx);
1262                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1263
1264                         iwl_set_flags_for_band(priv, ctx, channel->band,
1265                                                ctx->vif);
1266                 }
1267
1268                 iwl_update_bcast_stations(priv);
1269         }
1270
1271         if (changed & (IEEE80211_CONF_CHANGE_PS |
1272                         IEEE80211_CONF_CHANGE_IDLE)) {
1273                 ret = iwl_power_update_mode(priv, false);
1274                 if (ret)
1275                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1276         }
1277
1278         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1279                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1280                         priv->tx_power_user_lmt, conf->power_level);
1281
1282                 iwl_set_tx_power(priv, conf->power_level, false);
1283         }
1284
1285         for_each_context(priv, ctx) {
1286                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1287                         continue;
1288                 iwlagn_commit_rxon(priv, ctx);
1289         }
1290  out:
1291         mutex_unlock(&priv->mutex);
1292         IWL_DEBUG_MAC80211(priv, "leave\n");
1293
1294         return ret;
1295 }
1296
1297 void iwlagn_check_needed_chains(struct iwl_priv *priv,
1298                                 struct iwl_rxon_context *ctx,
1299                                 struct ieee80211_bss_conf *bss_conf)
1300 {
1301         struct ieee80211_vif *vif = ctx->vif;
1302         struct iwl_rxon_context *tmp;
1303         struct ieee80211_sta *sta;
1304         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1305         struct ieee80211_sta_ht_cap *ht_cap;
1306         bool need_multiple;
1307
1308         lockdep_assert_held(&priv->mutex);
1309
1310         switch (vif->type) {
1311         case NL80211_IFTYPE_STATION:
1312                 rcu_read_lock();
1313                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
1314                 if (!sta) {
1315                         /*
1316                          * If at all, this can only happen through a race
1317                          * when the AP disconnects us while we're still
1318                          * setting up the connection, in that case mac80211
1319                          * will soon tell us about that.
1320                          */
1321                         need_multiple = false;
1322                         rcu_read_unlock();
1323                         break;
1324                 }
1325
1326                 ht_cap = &sta->ht_cap;
1327
1328                 need_multiple = true;
1329
1330                 /*
1331                  * If the peer advertises no support for receiving 2 and 3
1332                  * stream MCS rates, it can't be transmitting them either.
1333                  */
1334                 if (ht_cap->mcs.rx_mask[1] == 0 &&
1335                     ht_cap->mcs.rx_mask[2] == 0) {
1336                         need_multiple = false;
1337                 } else if (!(ht_cap->mcs.tx_params &
1338                                                 IEEE80211_HT_MCS_TX_DEFINED)) {
1339                         /* If it can't TX MCS at all ... */
1340                         need_multiple = false;
1341                 } else if (ht_cap->mcs.tx_params &
1342                                                 IEEE80211_HT_MCS_TX_RX_DIFF) {
1343                         int maxstreams;
1344
1345                         /*
1346                          * But if it can receive them, it might still not
1347                          * be able to transmit them, which is what we need
1348                          * to check here -- so check the number of streams
1349                          * it advertises for TX (if different from RX).
1350                          */
1351
1352                         maxstreams = (ht_cap->mcs.tx_params &
1353                                  IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1354                         maxstreams >>=
1355                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1356                         maxstreams += 1;
1357
1358                         if (maxstreams <= 1)
1359                                 need_multiple = false;
1360                 }
1361
1362                 rcu_read_unlock();
1363                 break;
1364         case NL80211_IFTYPE_ADHOC:
1365                 /* currently */
1366                 need_multiple = false;
1367                 break;
1368         default:
1369                 /* only AP really */
1370                 need_multiple = true;
1371                 break;
1372         }
1373
1374         ctx->ht_need_multiple_chains = need_multiple;
1375
1376         if (!need_multiple) {
1377                 /* check all contexts */
1378                 for_each_context(priv, tmp) {
1379                         if (!tmp->vif)
1380                                 continue;
1381                         if (tmp->ht_need_multiple_chains) {
1382                                 need_multiple = true;
1383                                 break;
1384                         }
1385                 }
1386         }
1387
1388         ht_conf->single_chain_sufficient = !need_multiple;
1389 }
1390
1391 void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1392 {
1393         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1394         int ret;
1395
1396         if (!(priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED))
1397                 return;
1398
1399         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1400             iwl_is_any_associated(priv)) {
1401                 struct iwl_calib_chain_noise_reset_cmd cmd;
1402
1403                 /* clear data for chain noise calibration algorithm */
1404                 data->chain_noise_a = 0;
1405                 data->chain_noise_b = 0;
1406                 data->chain_noise_c = 0;
1407                 data->chain_signal_a = 0;
1408                 data->chain_signal_b = 0;
1409                 data->chain_signal_c = 0;
1410                 data->beacon_count = 0;
1411
1412                 memset(&cmd, 0, sizeof(cmd));
1413                 iwl_set_calib_hdr(&cmd.hdr,
1414                         priv->phy_calib_chain_noise_reset_cmd);
1415                 ret = iwl_dvm_send_cmd_pdu(priv,
1416                                         REPLY_PHY_CALIBRATION_CMD,
1417                                         CMD_SYNC, sizeof(cmd), &cmd);
1418                 if (ret)
1419                         IWL_ERR(priv,
1420                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1421                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1422                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1423         }
1424 }
1425
1426 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1427                              struct ieee80211_vif *vif,
1428                              struct ieee80211_bss_conf *bss_conf,
1429                              u32 changes)
1430 {
1431         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1432         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1433         int ret;
1434         bool force = false;
1435
1436         mutex_lock(&priv->mutex);
1437
1438         if (unlikely(!iwl_is_ready(priv))) {
1439                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1440                 mutex_unlock(&priv->mutex);
1441                 return;
1442         }
1443
1444         if (unlikely(!ctx->vif)) {
1445                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1446                 mutex_unlock(&priv->mutex);
1447                 return;
1448         }
1449
1450         if (changes & BSS_CHANGED_BEACON_INT)
1451                 force = true;
1452
1453         if (changes & BSS_CHANGED_QOS) {
1454                 ctx->qos_data.qos_active = bss_conf->qos;
1455                 iwlagn_update_qos(priv, ctx);
1456         }
1457
1458         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1459         if (vif->bss_conf.use_short_preamble)
1460                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1461         else
1462                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1463
1464         if (changes & BSS_CHANGED_ASSOC) {
1465                 if (bss_conf->assoc) {
1466                         priv->timestamp = bss_conf->last_tsf;
1467                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1468                 } else {
1469                         /*
1470                          * If we disassociate while there are pending
1471                          * frames, just wake up the queues and let the
1472                          * frames "escape" ... This shouldn't really
1473                          * be happening to start with, but we should
1474                          * not get stuck in this case either since it
1475                          * can happen if userspace gets confused.
1476                          */
1477                         iwlagn_lift_passive_no_rx(priv);
1478
1479                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1480
1481                         if (ctx->ctxid == IWL_RXON_CTX_BSS)
1482                                 priv->have_rekey_data = false;
1483                 }
1484
1485                 iwlagn_bt_coex_rssi_monitor(priv);
1486         }
1487
1488         if (ctx->ht.enabled) {
1489                 ctx->ht.protection = bss_conf->ht_operation_mode &
1490                                         IEEE80211_HT_OP_MODE_PROTECTION;
1491                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1492                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1493                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
1494                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
1495         }
1496
1497         iwlagn_set_rxon_chain(priv, ctx);
1498
1499         if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1500                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1501         else
1502                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1503
1504         if (bss_conf->use_cts_prot)
1505                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1506         else
1507                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1508
1509         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1510
1511         if (vif->type == NL80211_IFTYPE_AP ||
1512             vif->type == NL80211_IFTYPE_ADHOC) {
1513                 if (vif->bss_conf.enable_beacon) {
1514                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1515                         priv->beacon_ctx = ctx;
1516                 } else {
1517                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1518                         priv->beacon_ctx = NULL;
1519                 }
1520         }
1521
1522         /*
1523          * If the ucode decides to do beacon filtering before
1524          * association, it will lose beacons that are needed
1525          * before sending frames out on passive channels. This
1526          * causes association failures on those channels. Enable
1527          * receiving beacons in such cases.
1528          */
1529
1530         if (vif->type == NL80211_IFTYPE_STATION) {
1531                 if (!bss_conf->assoc)
1532                         ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1533                 else
1534                         ctx->staging.filter_flags &=
1535                                                     ~RXON_FILTER_BCON_AWARE_MSK;
1536         }
1537
1538         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1539                 iwlagn_commit_rxon(priv, ctx);
1540
1541         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1542                 /*
1543                  * The chain noise calibration will enable PM upon
1544                  * completion. If calibration has already been run
1545                  * then we need to enable power management here.
1546                  */
1547                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1548                         iwl_power_update_mode(priv, false);
1549
1550                 /* Enable RX differential gain and sensitivity calibrations */
1551                 iwlagn_chain_noise_reset(priv);
1552                 priv->start_calib = 1;
1553         }
1554
1555         if (changes & BSS_CHANGED_IBSS) {
1556                 ret = iwlagn_manage_ibss_station(priv, vif,
1557                                                  bss_conf->ibss_joined);
1558                 if (ret)
1559                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1560                                 bss_conf->ibss_joined ? "add" : "remove",
1561                                 bss_conf->bssid);
1562         }
1563
1564         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
1565             priv->beacon_ctx) {
1566                 if (iwlagn_update_beacon(priv, vif))
1567                         IWL_ERR(priv, "Error sending IBSS beacon\n");
1568         }
1569
1570         mutex_unlock(&priv->mutex);
1571 }
1572
1573 void iwlagn_post_scan(struct iwl_priv *priv)
1574 {
1575         struct iwl_rxon_context *ctx;
1576
1577         /*
1578          * We do not commit power settings while scan is pending,
1579          * do it now if the settings changed.
1580          */
1581         iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1582         iwl_set_tx_power(priv, priv->tx_power_next, false);
1583
1584         /*
1585          * Since setting the RXON may have been deferred while
1586          * performing the scan, fire one off if needed
1587          */
1588         for_each_context(priv, ctx)
1589                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1590                         iwlagn_commit_rxon(priv, ctx);
1591
1592         iwlagn_set_pan_params(priv);
1593 }