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

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

DEFINITIONS
