linux/drivers/net/wireless/iwlwifi/dvm/rxon.c
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   1/******************************************************************************
   2 *
   3 * Copyright(c) 2003 - 2014 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-trans.h"
  29#include "iwl-modparams.h"
  30#include "dev.h"
  31#include "agn.h"
  32#include "calib.h"
  33
  34/*
  35 * initialize rxon structure with default values from eeprom
  36 */
  37void iwl_connection_init_rx_config(struct iwl_priv *priv,
  38                                   struct iwl_rxon_context *ctx)
  39{
  40        memset(&ctx->staging, 0, sizeof(ctx->staging));
  41
  42        if (!ctx->vif) {
  43                ctx->staging.dev_type = ctx->unused_devtype;
  44        } else
  45        switch (ctx->vif->type) {
  46        case NL80211_IFTYPE_AP:
  47                ctx->staging.dev_type = ctx->ap_devtype;
  48                break;
  49
  50        case NL80211_IFTYPE_STATION:
  51                ctx->staging.dev_type = ctx->station_devtype;
  52                ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
  53                break;
  54
  55        case NL80211_IFTYPE_ADHOC:
  56                ctx->staging.dev_type = ctx->ibss_devtype;
  57                ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
  58                ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
  59                                                  RXON_FILTER_ACCEPT_GRP_MSK;
  60                break;
  61
  62        case NL80211_IFTYPE_MONITOR:
  63                ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
  64                break;
  65
  66        default:
  67                IWL_ERR(priv, "Unsupported interface type %d\n",
  68                        ctx->vif->type);
  69                break;
  70        }
  71
  72#if 0
  73        /* TODO:  Figure out when short_preamble would be set and cache from
  74         * that */
  75        if (!hw_to_local(priv->hw)->short_preamble)
  76                ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
  77        else
  78                ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
  79#endif
  80
  81        ctx->staging.channel =
  82                cpu_to_le16(priv->hw->conf.chandef.chan->hw_value);
  83        priv->band = priv->hw->conf.chandef.chan->band;
  84
  85        iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
  86
  87        /* clear both MIX and PURE40 mode flag */
  88        ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
  89                                        RXON_FLG_CHANNEL_MODE_PURE_40);
  90        if (ctx->vif)
  91                memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
  92
  93        ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
  94        ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
  95        ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
  96}
  97
  98static int iwlagn_disable_bss(struct iwl_priv *priv,
  99                              struct iwl_rxon_context *ctx,
 100                              struct iwl_rxon_cmd *send)
 101{
 102        __le32 old_filter = send->filter_flags;
 103        int ret;
 104
 105        send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 106        ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
 107                                0, sizeof(*send), send);
 108
 109        send->filter_flags = old_filter;
 110
 111        if (ret)
 112                IWL_DEBUG_QUIET_RFKILL(priv,
 113                        "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
 114
 115        return ret;
 116}
 117
 118static int iwlagn_disable_pan(struct iwl_priv *priv,
 119                              struct iwl_rxon_context *ctx,
 120                              struct iwl_rxon_cmd *send)
 121{
 122        struct iwl_notification_wait disable_wait;
 123        __le32 old_filter = send->filter_flags;
 124        u8 old_dev_type = send->dev_type;
 125        int ret;
 126        static const u8 deactivate_cmd[] = {
 127                REPLY_WIPAN_DEACTIVATION_COMPLETE
 128        };
 129
 130        iwl_init_notification_wait(&priv->notif_wait, &disable_wait,
 131                                   deactivate_cmd, ARRAY_SIZE(deactivate_cmd),
 132                                   NULL, NULL);
 133
 134        send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 135        send->dev_type = RXON_DEV_TYPE_P2P;
 136        ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,
 137                                0, sizeof(*send), send);
 138
 139        send->filter_flags = old_filter;
 140        send->dev_type = old_dev_type;
 141
 142        if (ret) {
 143                IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
 144                iwl_remove_notification(&priv->notif_wait, &disable_wait);
 145        } else {
 146                ret = iwl_wait_notification(&priv->notif_wait,
 147                                            &disable_wait, HZ);
 148                if (ret)
 149                        IWL_ERR(priv, "Timed out waiting for PAN disable\n");
 150        }
 151
 152        return ret;
 153}
 154
 155static int iwlagn_disconn_pan(struct iwl_priv *priv,
 156                              struct iwl_rxon_context *ctx,
 157                              struct iwl_rxon_cmd *send)
 158{
 159        __le32 old_filter = send->filter_flags;
 160        int ret;
 161
 162        send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 163        ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
 164                                sizeof(*send), send);
 165
 166        send->filter_flags = old_filter;
 167
 168        return ret;
 169}
 170
 171static void iwlagn_update_qos(struct iwl_priv *priv,
 172                              struct iwl_rxon_context *ctx)
 173{
 174        int ret;
 175
 176        if (!ctx->is_active)
 177                return;
 178
 179        ctx->qos_data.def_qos_parm.qos_flags = 0;
 180
 181        if (ctx->qos_data.qos_active)
 182                ctx->qos_data.def_qos_parm.qos_flags |=
 183                        QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 184
 185        if (ctx->ht.enabled)
 186                ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 187
 188        IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 189                      ctx->qos_data.qos_active,
 190                      ctx->qos_data.def_qos_parm.qos_flags);
 191
 192        ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0,
 193                               sizeof(struct iwl_qosparam_cmd),
 194                               &ctx->qos_data.def_qos_parm);
 195        if (ret)
 196                IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");
 197}
 198
 199static int iwlagn_update_beacon(struct iwl_priv *priv,
 200                                struct ieee80211_vif *vif)
 201{
 202        lockdep_assert_held(&priv->mutex);
 203
 204        dev_kfree_skb(priv->beacon_skb);
 205        priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
 206        if (!priv->beacon_skb)
 207                return -ENOMEM;
 208        return iwlagn_send_beacon_cmd(priv);
 209}
 210
 211static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
 212                                  struct iwl_rxon_context *ctx)
 213{
 214        int ret = 0;
 215        struct iwl_rxon_assoc_cmd rxon_assoc;
 216        const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
 217        const struct iwl_rxon_cmd *rxon2 = &ctx->active;
 218
 219        if ((rxon1->flags == rxon2->flags) &&
 220            (rxon1->filter_flags == rxon2->filter_flags) &&
 221            (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 222            (rxon1->ofdm_ht_single_stream_basic_rates ==
 223             rxon2->ofdm_ht_single_stream_basic_rates) &&
 224            (rxon1->ofdm_ht_dual_stream_basic_rates ==
 225             rxon2->ofdm_ht_dual_stream_basic_rates) &&
 226            (rxon1->ofdm_ht_triple_stream_basic_rates ==
 227             rxon2->ofdm_ht_triple_stream_basic_rates) &&
 228            (rxon1->acquisition_data == rxon2->acquisition_data) &&
 229            (rxon1->rx_chain == rxon2->rx_chain) &&
 230            (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 231                IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
 232                return 0;
 233        }
 234
 235        rxon_assoc.flags = ctx->staging.flags;
 236        rxon_assoc.filter_flags = ctx->staging.filter_flags;
 237        rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
 238        rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
 239        rxon_assoc.reserved1 = 0;
 240        rxon_assoc.reserved2 = 0;
 241        rxon_assoc.reserved3 = 0;
 242        rxon_assoc.ofdm_ht_single_stream_basic_rates =
 243            ctx->staging.ofdm_ht_single_stream_basic_rates;
 244        rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 245            ctx->staging.ofdm_ht_dual_stream_basic_rates;
 246        rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
 247        rxon_assoc.ofdm_ht_triple_stream_basic_rates =
 248                 ctx->staging.ofdm_ht_triple_stream_basic_rates;
 249        rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
 250
 251        ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,
 252                                CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);
 253        return ret;
 254}
 255
 256static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 257{
 258        u16 new_val;
 259        u16 beacon_factor;
 260
 261        /*
 262         * If mac80211 hasn't given us a beacon interval, program
 263         * the default into the device (not checking this here
 264         * would cause the adjustment below to return the maximum
 265         * value, which may break PAN.)
 266         */
 267        if (!beacon_val)
 268                return DEFAULT_BEACON_INTERVAL;
 269
 270        /*
 271         * If the beacon interval we obtained from the peer
 272         * is too large, we'll have to wake up more often
 273         * (and in IBSS case, we'll beacon too much)
 274         *
 275         * For example, if max_beacon_val is 4096, and the
 276         * requested beacon interval is 7000, we'll have to
 277         * use 3500 to be able to wake up on the beacons.
 278         *
 279         * This could badly influence beacon detection stats.
 280         */
 281
 282        beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 283        new_val = beacon_val / beacon_factor;
 284
 285        if (!new_val)
 286                new_val = max_beacon_val;
 287
 288        return new_val;
 289}
 290
 291static int iwl_send_rxon_timing(struct iwl_priv *priv,
 292                                struct iwl_rxon_context *ctx)
 293{
 294        u64 tsf;
 295        s32 interval_tm, rem;
 296        struct ieee80211_conf *conf = NULL;
 297        u16 beacon_int;
 298        struct ieee80211_vif *vif = ctx->vif;
 299
 300        conf = &priv->hw->conf;
 301
 302        lockdep_assert_held(&priv->mutex);
 303
 304        memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 305
 306        ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 307        ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 308
 309        beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 310
 311        /*
 312         * TODO: For IBSS we need to get atim_window from mac80211,
 313         *       for now just always use 0
 314         */
 315        ctx->timing.atim_window = 0;
 316
 317        if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 318            (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 319            iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 320            priv->contexts[IWL_RXON_CTX_BSS].vif &&
 321            priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 322                ctx->timing.beacon_interval =
 323                        priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 324                beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 325        } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 326                   iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 327                   priv->contexts[IWL_RXON_CTX_PAN].vif &&
 328                   priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 329                   (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 330                    !ctx->vif->bss_conf.beacon_int)) {
 331                ctx->timing.beacon_interval =
 332                        priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 333                beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 334        } else {
 335                beacon_int = iwl_adjust_beacon_interval(beacon_int,
 336                        IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 337                ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 338        }
 339
 340        ctx->beacon_int = beacon_int;
 341
 342        tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 343        interval_tm = beacon_int * TIME_UNIT;
 344        rem = do_div(tsf, interval_tm);
 345        ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 346
 347        ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 348
 349        IWL_DEBUG_ASSOC(priv,
 350                        "beacon interval %d beacon timer %d beacon tim %d\n",
 351                        le16_to_cpu(ctx->timing.beacon_interval),
 352                        le32_to_cpu(ctx->timing.beacon_init_val),
 353                        le16_to_cpu(ctx->timing.atim_window));
 354
 355        return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 356                                0, sizeof(ctx->timing), &ctx->timing);
 357}
 358
 359static int iwlagn_rxon_disconn(struct iwl_priv *priv,
 360                               struct iwl_rxon_context *ctx)
 361{
 362        int ret;
 363        struct iwl_rxon_cmd *active = (void *)&ctx->active;
 364
 365        if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 366                ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 367        } else {
 368                ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 369                if (ret)
 370                        return ret;
 371                if (ctx->vif) {
 372                        ret = iwl_send_rxon_timing(priv, ctx);
 373                        if (ret) {
 374                                IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 375                                return ret;
 376                        }
 377                        ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);
 378                }
 379        }
 380        if (ret)
 381                return ret;
 382
 383        /*
 384         * Un-assoc RXON clears the station table and WEP
 385         * keys, so we have to restore those afterwards.
 386         */
 387        iwl_clear_ucode_stations(priv, ctx);
 388        /* update -- might need P2P now */
 389        iwl_update_bcast_station(priv, ctx);
 390        iwl_restore_stations(priv, ctx);
 391        ret = iwl_restore_default_wep_keys(priv, ctx);
 392        if (ret) {
 393                IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 394                return ret;
 395        }
 396
 397        memcpy(active, &ctx->staging, sizeof(*active));
 398        return 0;
 399}
 400
 401static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 402{
 403        int ret;
 404        s8 prev_tx_power;
 405        bool defer;
 406        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 407
 408        if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)
 409                return 0;
 410
 411        lockdep_assert_held(&priv->mutex);
 412
 413        if (priv->tx_power_user_lmt == tx_power && !force)
 414                return 0;
 415
 416        if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
 417                IWL_WARN(priv,
 418                         "Requested user TXPOWER %d below lower limit %d.\n",
 419                         tx_power,
 420                         IWLAGN_TX_POWER_TARGET_POWER_MIN);
 421                return -EINVAL;
 422        }
 423
 424        if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {
 425                IWL_WARN(priv,
 426                        "Requested user TXPOWER %d above upper limit %d.\n",
 427                         tx_power, priv->nvm_data->max_tx_pwr_half_dbm);
 428                return -EINVAL;
 429        }
 430
 431        if (!iwl_is_ready_rf(priv))
 432                return -EIO;
 433
 434        /* scan complete and commit_rxon use tx_power_next value,
 435         * it always need to be updated for newest request */
 436        priv->tx_power_next = tx_power;
 437
 438        /* do not set tx power when scanning or channel changing */
 439        defer = test_bit(STATUS_SCANNING, &priv->status) ||
 440                memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
 441        if (defer && !force) {
 442                IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
 443                return 0;
 444        }
 445
 446        prev_tx_power = priv->tx_power_user_lmt;
 447        priv->tx_power_user_lmt = tx_power;
 448
 449        ret = iwlagn_send_tx_power(priv);
 450
 451        /* if fail to set tx_power, restore the orig. tx power */
 452        if (ret) {
 453                priv->tx_power_user_lmt = prev_tx_power;
 454                priv->tx_power_next = prev_tx_power;
 455        }
 456        return ret;
 457}
 458
 459static int iwlagn_rxon_connect(struct iwl_priv *priv,
 460                               struct iwl_rxon_context *ctx)
 461{
 462        int ret;
 463        struct iwl_rxon_cmd *active = (void *)&ctx->active;
 464
 465        /* RXON timing must be before associated RXON */
 466        if (ctx->ctxid == IWL_RXON_CTX_BSS) {
 467                ret = iwl_send_rxon_timing(priv, ctx);
 468                if (ret) {
 469                        IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 470                        return ret;
 471                }
 472        }
 473        /* QoS info may be cleared by previous un-assoc RXON */
 474        iwlagn_update_qos(priv, ctx);
 475
 476        /*
 477         * We'll run into this code path when beaconing is
 478         * enabled, but then we also need to send the beacon
 479         * to the device.
 480         */
 481        if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 482                ret = iwlagn_update_beacon(priv, ctx->vif);
 483                if (ret) {
 484                        IWL_ERR(priv,
 485                                "Error sending required beacon (%d)!\n",
 486                                ret);
 487                        return ret;
 488                }
 489        }
 490
 491        priv->start_calib = 0;
 492        /*
 493         * Apply the new configuration.
 494         *
 495         * Associated RXON doesn't clear the station table in uCode,
 496         * so we don't need to restore stations etc. after this.
 497         */
 498        ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,
 499                      sizeof(struct iwl_rxon_cmd), &ctx->staging);
 500        if (ret) {
 501                IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 502                return ret;
 503        }
 504        memcpy(active, &ctx->staging, sizeof(*active));
 505
 506        /* IBSS beacon needs to be sent after setting assoc */
 507        if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 508                if (iwlagn_update_beacon(priv, ctx->vif))
 509                        IWL_ERR(priv, "Error sending IBSS beacon\n");
 510        iwl_init_sensitivity(priv);
 511
 512        /*
 513         * If we issue a new RXON command which required a tune then
 514         * we must send a new TXPOWER command or we won't be able to
 515         * Tx any frames.
 516         *
 517         * It's expected we set power here if channel is changing.
 518         */
 519        ret = iwl_set_tx_power(priv, priv->tx_power_next, true);
 520        if (ret) {
 521                IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 522                return ret;
 523        }
 524
 525        if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
 526            priv->cfg->ht_params && priv->cfg->ht_params->smps_mode)
 527                ieee80211_request_smps(ctx->vif,
 528                                       priv->cfg->ht_params->smps_mode);
 529
 530        return 0;
 531}
 532
 533int iwlagn_set_pan_params(struct iwl_priv *priv)
 534{
 535        struct iwl_wipan_params_cmd cmd;
 536        struct iwl_rxon_context *ctx_bss, *ctx_pan;
 537        int slot0 = 300, slot1 = 0;
 538        int ret;
 539
 540        if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
 541                return 0;
 542
 543        BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 544
 545        lockdep_assert_held(&priv->mutex);
 546
 547        ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
 548        ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
 549
 550        /*
 551         * If the PAN context is inactive, then we don't need
 552         * to update the PAN parameters, the last thing we'll
 553         * have done before it goes inactive is making the PAN
 554         * parameters be WLAN-only.
 555         */
 556        if (!ctx_pan->is_active)
 557                return 0;
 558
 559        memset(&cmd, 0, sizeof(cmd));
 560
 561        /* only 2 slots are currently allowed */
 562        cmd.num_slots = 2;
 563
 564        cmd.slots[0].type = 0; /* BSS */
 565        cmd.slots[1].type = 1; /* PAN */
 566
 567        if (ctx_bss->vif && ctx_pan->vif) {
 568                int bcnint = ctx_pan->beacon_int;
 569                int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
 570
 571                /* should be set, but seems unused?? */
 572                cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
 573
 574                if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
 575                    bcnint &&
 576                    bcnint != ctx_bss->beacon_int) {
 577                        IWL_ERR(priv,
 578                                "beacon intervals don't match (%d, %d)\n",
 579                                ctx_bss->beacon_int, ctx_pan->beacon_int);
 580                } else
 581                        bcnint = max_t(int, bcnint,
 582                                       ctx_bss->beacon_int);
 583                if (!bcnint)
 584                        bcnint = DEFAULT_BEACON_INTERVAL;
 585                slot0 = bcnint / 2;
 586                slot1 = bcnint - slot0;
 587
 588                if (test_bit(STATUS_SCAN_HW, &priv->status) ||
 589                    (!ctx_bss->vif->bss_conf.idle &&
 590                     !ctx_bss->vif->bss_conf.assoc)) {
 591                        slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 592                        slot1 = IWL_MIN_SLOT_TIME;
 593                } else if (!ctx_pan->vif->bss_conf.idle &&
 594                           !ctx_pan->vif->bss_conf.assoc) {
 595                        slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 596                        slot0 = IWL_MIN_SLOT_TIME;
 597                }
 598        } else if (ctx_pan->vif) {
 599                slot0 = 0;
 600                slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
 601                                        ctx_pan->beacon_int;
 602                slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
 603
 604                if (test_bit(STATUS_SCAN_HW, &priv->status)) {
 605                        slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
 606                        slot1 = IWL_MIN_SLOT_TIME;
 607                }
 608        }
 609
 610        cmd.slots[0].width = cpu_to_le16(slot0);
 611        cmd.slots[1].width = cpu_to_le16(slot1);
 612
 613        ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0,
 614                        sizeof(cmd), &cmd);
 615        if (ret)
 616                IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
 617
 618        return ret;
 619}
 620
 621static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 622                             struct iwl_ht_config *ht_conf,
 623                             struct iwl_rxon_context *ctx)
 624{
 625        struct iwl_rxon_cmd *rxon = &ctx->staging;
 626
 627        if (!ctx->ht.enabled) {
 628                rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 629                        RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 630                        RXON_FLG_HT40_PROT_MSK |
 631                        RXON_FLG_HT_PROT_MSK);
 632                return;
 633        }
 634
 635        /* FIXME: if the definition of ht.protection changed, the "translation"
 636         * will be needed for rxon->flags
 637         */
 638        rxon->flags |= cpu_to_le32(ctx->ht.protection <<
 639                                   RXON_FLG_HT_OPERATING_MODE_POS);
 640
 641        /* Set up channel bandwidth:
 642         * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 643        /* clear the HT channel mode before set the mode */
 644        rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 645                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 646        if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 647                /* pure ht40 */
 648                if (ctx->ht.protection ==
 649                    IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 650                        rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 651                        /*
 652                         * Note: control channel is opposite of extension
 653                         * channel
 654                         */
 655                        switch (ctx->ht.extension_chan_offset) {
 656                        case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 657                                rxon->flags &=
 658                                        ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 659                                break;
 660                        case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 661                                rxon->flags |=
 662                                        RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 663                                break;
 664                        }
 665                } else {
 666                        /*
 667                         * Note: control channel is opposite of extension
 668                         * channel
 669                         */
 670                        switch (ctx->ht.extension_chan_offset) {
 671                        case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 672                                rxon->flags &=
 673                                        ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 674                                rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 675                                break;
 676                        case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 677                                rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 678                                rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 679                                break;
 680                        case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 681                        default:
 682                                /*
 683                                 * channel location only valid if in Mixed
 684                                 * mode
 685                                 */
 686                                IWL_ERR(priv,
 687                                        "invalid extension channel offset\n");
 688                                break;
 689                        }
 690                }
 691        } else {
 692                rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 693        }
 694
 695        iwlagn_set_rxon_chain(priv, ctx);
 696
 697        IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 698                        "extension channel offset 0x%x\n",
 699                        le32_to_cpu(rxon->flags), ctx->ht.protection,
 700                        ctx->ht.extension_chan_offset);
 701}
 702
 703void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 704{
 705        struct iwl_rxon_context *ctx;
 706
 707        for_each_context(priv, ctx)
 708                _iwl_set_rxon_ht(priv, ht_conf, ctx);
 709}
 710
 711/**
 712 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 713 * @ch: requested channel as a pointer to struct ieee80211_channel
 714
 715 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 716 * in the staging RXON flag structure based on the ch->band
 717 */
 718void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 719                         struct iwl_rxon_context *ctx)
 720{
 721        enum ieee80211_band band = ch->band;
 722        u16 channel = ch->hw_value;
 723
 724        if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 725            (priv->band == band))
 726                return;
 727
 728        ctx->staging.channel = cpu_to_le16(channel);
 729        if (band == IEEE80211_BAND_5GHZ)
 730                ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 731        else
 732                ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 733
 734        priv->band = band;
 735
 736        IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 737
 738}
 739
 740void iwl_set_flags_for_band(struct iwl_priv *priv,
 741                            struct iwl_rxon_context *ctx,
 742                            enum ieee80211_band band,
 743                            struct ieee80211_vif *vif)
 744{
 745        if (band == IEEE80211_BAND_5GHZ) {
 746                ctx->staging.flags &=
 747                    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 748                      | RXON_FLG_CCK_MSK);
 749                ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 750        } else {
 751                /* Copied from iwl_post_associate() */
 752                if (vif && vif->bss_conf.use_short_slot)
 753                        ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 754                else
 755                        ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 756
 757                ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 758                ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 759                ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 760        }
 761}
 762
 763static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,
 764                                  struct iwl_rxon_context *ctx, int hw_decrypt)
 765{
 766        struct iwl_rxon_cmd *rxon = &ctx->staging;
 767
 768        if (hw_decrypt)
 769                rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 770        else
 771                rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 772
 773}
 774
 775/* validate RXON structure is valid */
 776static int iwl_check_rxon_cmd(struct iwl_priv *priv,
 777                              struct iwl_rxon_context *ctx)
 778{
 779        struct iwl_rxon_cmd *rxon = &ctx->staging;
 780        u32 errors = 0;
 781
 782        if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 783                if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 784                        IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 785                        errors |= BIT(0);
 786                }
 787                if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 788                        IWL_WARN(priv, "check 2.4G: wrong radar\n");
 789                        errors |= BIT(1);
 790                }
 791        } else {
 792                if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 793                        IWL_WARN(priv, "check 5.2G: not short slot!\n");
 794                        errors |= BIT(2);
 795                }
 796                if (rxon->flags & RXON_FLG_CCK_MSK) {
 797                        IWL_WARN(priv, "check 5.2G: CCK!\n");
 798                        errors |= BIT(3);
 799                }
 800        }
 801        if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 802                IWL_WARN(priv, "mac/bssid mcast!\n");
 803                errors |= BIT(4);
 804        }
 805
 806        /* make sure basic rates 6Mbps and 1Mbps are supported */
 807        if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 808            (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 809                IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 810                errors |= BIT(5);
 811        }
 812
 813        if (le16_to_cpu(rxon->assoc_id) > 2007) {
 814                IWL_WARN(priv, "aid > 2007\n");
 815                errors |= BIT(6);
 816        }
 817
 818        if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 819                        == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 820                IWL_WARN(priv, "CCK and short slot\n");
 821                errors |= BIT(7);
 822        }
 823
 824        if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 825                        == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 826                IWL_WARN(priv, "CCK and auto detect\n");
 827                errors |= BIT(8);
 828        }
 829
 830        if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 831                            RXON_FLG_TGG_PROTECT_MSK)) ==
 832                            RXON_FLG_TGG_PROTECT_MSK) {
 833                IWL_WARN(priv, "TGg but no auto-detect\n");
 834                errors |= BIT(9);
 835        }
 836
 837        if (rxon->channel == 0) {
 838                IWL_WARN(priv, "zero channel is invalid\n");
 839                errors |= BIT(10);
 840        }
 841
 842        WARN(errors, "Invalid RXON (%#x), channel %d",
 843             errors, le16_to_cpu(rxon->channel));
 844
 845        return errors ? -EINVAL : 0;
 846}
 847
 848/**
 849 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 850 * @priv: staging_rxon is compared to active_rxon
 851 *
 852 * If the RXON structure is changing enough to require a new tune,
 853 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 854 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 855 */
 856static int iwl_full_rxon_required(struct iwl_priv *priv,
 857                                  struct iwl_rxon_context *ctx)
 858{
 859        const struct iwl_rxon_cmd *staging = &ctx->staging;
 860        const struct iwl_rxon_cmd *active = &ctx->active;
 861
 862#define CHK(cond)                                                       \
 863        if ((cond)) {                                                   \
 864                IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 865                return 1;                                               \
 866        }
 867
 868#define CHK_NEQ(c1, c2)                                         \
 869        if ((c1) != (c2)) {                                     \
 870                IWL_DEBUG_INFO(priv, "need full RXON - "        \
 871                               #c1 " != " #c2 " - %d != %d\n",  \
 872                               (c1), (c2));                     \
 873                return 1;                                       \
 874        }
 875
 876        /* These items are only settable from the full RXON command */
 877        CHK(!iwl_is_associated_ctx(ctx));
 878        CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
 879        CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
 880        CHK(!ether_addr_equal(staging->wlap_bssid_addr,
 881                              active->wlap_bssid_addr));
 882        CHK_NEQ(staging->dev_type, active->dev_type);
 883        CHK_NEQ(staging->channel, active->channel);
 884        CHK_NEQ(staging->air_propagation, active->air_propagation);
 885        CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 886                active->ofdm_ht_single_stream_basic_rates);
 887        CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 888                active->ofdm_ht_dual_stream_basic_rates);
 889        CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 890                active->ofdm_ht_triple_stream_basic_rates);
 891        CHK_NEQ(staging->assoc_id, active->assoc_id);
 892
 893        /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 894         * be updated with the RXON_ASSOC command -- however only some
 895         * flag transitions are allowed using RXON_ASSOC */
 896
 897        /* Check if we are not switching bands */
 898        CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 899                active->flags & RXON_FLG_BAND_24G_MSK);
 900
 901        /* Check if we are switching association toggle */
 902        CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 903                active->filter_flags & RXON_FILTER_ASSOC_MSK);
 904
 905#undef CHK
 906#undef CHK_NEQ
 907
 908        return 0;
 909}
 910
 911#ifdef CONFIG_IWLWIFI_DEBUG
 912void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 913                             enum iwl_rxon_context_id ctxid)
 914{
 915        struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 916        struct iwl_rxon_cmd *rxon = &ctx->staging;
 917
 918        IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 919        iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 920        IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
 921                        le16_to_cpu(rxon->channel));
 922        IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",
 923                        le32_to_cpu(rxon->flags));
 924        IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 925                        le32_to_cpu(rxon->filter_flags));
 926        IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 927        IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 928                        rxon->ofdm_basic_rates);
 929        IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
 930                        rxon->cck_basic_rates);
 931        IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 932        IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 933        IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
 934                        le16_to_cpu(rxon->assoc_id));
 935}
 936#endif
 937
 938static void iwl_calc_basic_rates(struct iwl_priv *priv,
 939                                 struct iwl_rxon_context *ctx)
 940{
 941        int lowest_present_ofdm = 100;
 942        int lowest_present_cck = 100;
 943        u8 cck = 0;
 944        u8 ofdm = 0;
 945
 946        if (ctx->vif) {
 947                struct ieee80211_supported_band *sband;
 948                unsigned long basic = ctx->vif->bss_conf.basic_rates;
 949                int i;
 950
 951                sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band];
 952
 953                for_each_set_bit(i, &basic, BITS_PER_LONG) {
 954                        int hw = sband->bitrates[i].hw_value;
 955                        if (hw >= IWL_FIRST_OFDM_RATE) {
 956                                ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 957                                if (lowest_present_ofdm > hw)
 958                                        lowest_present_ofdm = hw;
 959                        } else {
 960                                BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 961
 962                                cck |= BIT(hw);
 963                                if (lowest_present_cck > hw)
 964                                        lowest_present_cck = hw;
 965                        }
 966                }
 967        }
 968
 969        /*
 970         * Now we've got the basic rates as bitmaps in the ofdm and cck
 971         * variables. This isn't sufficient though, as there might not
 972         * be all the right rates in the bitmap. E.g. if the only basic
 973         * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 974         * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 975         *
 976         *    [...] a STA responding to a received frame shall transmit
 977         *    its Control Response frame [...] at the highest rate in the
 978         *    BSSBasicRateSet parameter that is less than or equal to the
 979         *    rate of the immediately previous frame in the frame exchange
 980         *    sequence ([...]) and that is of the same modulation class
 981         *    ([...]) as the received frame. If no rate contained in the
 982         *    BSSBasicRateSet parameter meets these conditions, then the
 983         *    control frame sent in response to a received frame shall be
 984         *    transmitted at the highest mandatory rate of the PHY that is
 985         *    less than or equal to the rate of the received frame, and
 986         *    that is of the same modulation class as the received frame.
 987         *
 988         * As a consequence, we need to add all mandatory rates that are
 989         * lower than all of the basic rates to these bitmaps.
 990         */
 991
 992        if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 993                ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;
 994        if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 995                ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;
 996        /* 6M already there or needed so always add */
 997        ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;
 998
 999        /*
1000         * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
1001         * Note, however:
1002         *  - if no CCK rates are basic, it must be ERP since there must
1003         *    be some basic rates at all, so they're OFDM => ERP PHY
1004         *    (or we're in 5 GHz, and the cck bitmap will never be used)
1005         *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
1006         *  - if 5.5M is basic, 1M and 2M are mandatory
1007         *  - if 2M is basic, 1M is mandatory
1008         *  - if 1M is basic, that's the only valid ACK rate.
1009         * As a consequence, it's not as complicated as it sounds, just add
1010         * any lower rates to the ACK rate bitmap.
1011         */
1012        if (IWL_RATE_11M_INDEX < lowest_present_cck)
1013                cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
1014        if (IWL_RATE_5M_INDEX < lowest_present_cck)
1015                cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
1016        if (IWL_RATE_2M_INDEX < lowest_present_cck)
1017                cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
1018        /* 1M already there or needed so always add */
1019        cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;
1020
1021        IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",
1022                       cck, ofdm);
1023
1024        /* "basic_rates" is a misnomer here -- should be called ACK rates */
1025        ctx->staging.cck_basic_rates = cck;
1026        ctx->staging.ofdm_basic_rates = ofdm;
1027}
1028
1029/**
1030 * iwlagn_commit_rxon - commit staging_rxon to hardware
1031 *
1032 * The RXON command in staging_rxon is committed to the hardware and
1033 * the active_rxon structure is updated with the new data.  This
1034 * function correctly transitions out of the RXON_ASSOC_MSK state if
1035 * a HW tune is required based on the RXON structure changes.
1036 *
1037 * The connect/disconnect flow should be as the following:
1038 *
1039 * 1. make sure send RXON command with association bit unset if not connect
1040 *      this should include the channel and the band for the candidate
1041 *      to be connected to
1042 * 2. Add Station before RXON association with the AP
1043 * 3. RXON_timing has to send before RXON for connection
1044 * 4. full RXON command - associated bit set
1045 * 5. use RXON_ASSOC command to update any flags changes
1046 */
1047int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1048{
1049        /* cast away the const for active_rxon in this function */
1050        struct iwl_rxon_cmd *active = (void *)&ctx->active;
1051        bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1052        int ret;
1053
1054        lockdep_assert_held(&priv->mutex);
1055
1056        if (!iwl_is_alive(priv))
1057                return -EBUSY;
1058
1059        /* This function hardcodes a bunch of dual-mode assumptions */
1060        BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1061
1062        if (!ctx->is_active)
1063                return 0;
1064
1065        /* always get timestamp with Rx frame */
1066        ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1067
1068        /* recalculate basic rates */
1069        iwl_calc_basic_rates(priv, ctx);
1070
1071        /*
1072         * force CTS-to-self frames protection if RTS-CTS is not preferred
1073         * one aggregation protection method
1074         */
1075        if (!priv->hw_params.use_rts_for_aggregation)
1076                ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1077
1078        if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
1079            !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
1080                ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1081        else
1082                ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1083
1084        iwl_print_rx_config_cmd(priv, ctx->ctxid);
1085        ret = iwl_check_rxon_cmd(priv, ctx);
1086        if (ret) {
1087                IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1088                return -EINVAL;
1089        }
1090
1091        /*
1092         * receive commit_rxon request
1093         * abort any previous channel switch if still in process
1094         */
1095        if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1096            (priv->switch_channel != ctx->staging.channel)) {
1097                IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1098                              le16_to_cpu(priv->switch_channel));
1099                iwl_chswitch_done(priv, false);
1100        }
1101
1102        /*
1103         * If we don't need to send a full RXON, we can use
1104         * iwl_rxon_assoc_cmd which is used to reconfigure filter
1105         * and other flags for the current radio configuration.
1106         */
1107        if (!iwl_full_rxon_required(priv, ctx)) {
1108                ret = iwlagn_send_rxon_assoc(priv, ctx);
1109                if (ret) {
1110                        IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1111                        return ret;
1112                }
1113
1114                memcpy(active, &ctx->staging, sizeof(*active));
1115                /*
1116                 * We do not commit tx power settings while channel changing,
1117                 * do it now if after settings changed.
1118                 */
1119                iwl_set_tx_power(priv, priv->tx_power_next, false);
1120
1121                /* make sure we are in the right PS state */
1122                iwl_power_update_mode(priv, true);
1123
1124                return 0;
1125        }
1126
1127        iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto);
1128
1129        IWL_DEBUG_INFO(priv,
1130                       "Going to commit RXON\n"
1131                       "  * with%s RXON_FILTER_ASSOC_MSK\n"
1132                       "  * channel = %d\n"
1133                       "  * bssid = %pM\n",
1134                       (new_assoc ? "" : "out"),
1135                       le16_to_cpu(ctx->staging.channel),
1136                       ctx->staging.bssid_addr);
1137
1138        /*
1139         * Always clear associated first, but with the correct config.
1140         * This is required as for example station addition for the
1141         * AP station must be done after the BSSID is set to correctly
1142         * set up filters in the device.
1143         */
1144        ret = iwlagn_rxon_disconn(priv, ctx);
1145        if (ret)
1146                return ret;
1147
1148        ret = iwlagn_set_pan_params(priv);
1149        if (ret)
1150                return ret;
1151
1152        if (new_assoc)
1153                return iwlagn_rxon_connect(priv, ctx);
1154
1155        return 0;
1156}
1157
1158void iwlagn_config_ht40(struct ieee80211_conf *conf,
1159                        struct iwl_rxon_context *ctx)
1160{
1161        if (conf_is_ht40_minus(conf)) {
1162                ctx->ht.extension_chan_offset =
1163                        IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1164                ctx->ht.is_40mhz = true;
1165        } else if (conf_is_ht40_plus(conf)) {
1166                ctx->ht.extension_chan_offset =
1167                        IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1168                ctx->ht.is_40mhz = true;
1169        } else {
1170                ctx->ht.extension_chan_offset =
1171                        IEEE80211_HT_PARAM_CHA_SEC_NONE;
1172                ctx->ht.is_40mhz = false;
1173        }
1174}
1175
1176int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
1177{
1178        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1179        struct iwl_rxon_context *ctx;
1180        struct ieee80211_conf *conf = &hw->conf;
1181        struct ieee80211_channel *channel = conf->chandef.chan;
1182        int ret = 0;
1183
1184        IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);
1185
1186        mutex_lock(&priv->mutex);
1187
1188        if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
1189                IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
1190                goto out;
1191        }
1192
1193        if (!iwl_is_ready(priv)) {
1194                IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1195                goto out;
1196        }
1197
1198        if (changed & (IEEE80211_CONF_CHANGE_SMPS |
1199                       IEEE80211_CONF_CHANGE_CHANNEL)) {
1200                /* mac80211 uses static for non-HT which is what we want */
1201                priv->current_ht_config.smps = conf->smps_mode;
1202
1203                /*
1204                 * Recalculate chain counts.
1205                 *
1206                 * If monitor mode is enabled then mac80211 will
1207                 * set up the SM PS mode to OFF if an HT channel is
1208                 * configured.
1209                 */
1210                for_each_context(priv, ctx)
1211                        iwlagn_set_rxon_chain(priv, ctx);
1212        }
1213
1214        if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1215                for_each_context(priv, ctx) {
1216                        /* Configure HT40 channels */
1217                        if (ctx->ht.enabled != conf_is_ht(conf))
1218                                ctx->ht.enabled = conf_is_ht(conf);
1219
1220                        if (ctx->ht.enabled) {
1221                                /* if HT40 is used, it should not change
1222                                 * after associated except channel switch */
1223                                if (!ctx->ht.is_40mhz ||
1224                                                !iwl_is_associated_ctx(ctx))
1225                                        iwlagn_config_ht40(conf, ctx);
1226                        } else
1227                                ctx->ht.is_40mhz = false;
1228
1229                        /*
1230                         * Default to no protection. Protection mode will
1231                         * later be set from BSS config in iwl_ht_conf
1232                         */
1233                        ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
1234
1235                        /* if we are switching from ht to 2.4 clear flags
1236                         * from any ht related info since 2.4 does not
1237                         * support ht */
1238                        if (le16_to_cpu(ctx->staging.channel) !=
1239                            channel->hw_value)
1240                                ctx->staging.flags = 0;
1241
1242                        iwl_set_rxon_channel(priv, channel, ctx);
1243                        iwl_set_rxon_ht(priv, &priv->current_ht_config);
1244
1245                        iwl_set_flags_for_band(priv, ctx, channel->band,
1246                                               ctx->vif);
1247                }
1248
1249                iwl_update_bcast_stations(priv);
1250        }
1251
1252        if (changed & (IEEE80211_CONF_CHANGE_PS |
1253                        IEEE80211_CONF_CHANGE_IDLE)) {
1254                ret = iwl_power_update_mode(priv, false);
1255                if (ret)
1256                        IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
1257        }
1258
1259        if (changed & IEEE80211_CONF_CHANGE_POWER) {
1260                IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
1261                        priv->tx_power_user_lmt, conf->power_level);
1262
1263                iwl_set_tx_power(priv, conf->power_level, false);
1264        }
1265
1266        for_each_context(priv, ctx) {
1267                if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1268                        continue;
1269                iwlagn_commit_rxon(priv, ctx);
1270        }
1271 out:
1272        mutex_unlock(&priv->mutex);
1273        IWL_DEBUG_MAC80211(priv, "leave\n");
1274
1275        return ret;
1276}
1277
1278static void iwlagn_check_needed_chains(struct iwl_priv *priv,
1279                                       struct iwl_rxon_context *ctx,
1280                                       struct ieee80211_bss_conf *bss_conf)
1281{
1282        struct ieee80211_vif *vif = ctx->vif;
1283        struct iwl_rxon_context *tmp;
1284        struct ieee80211_sta *sta;
1285        struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1286        struct ieee80211_sta_ht_cap *ht_cap;
1287        bool need_multiple;
1288
1289        lockdep_assert_held(&priv->mutex);
1290
1291        switch (vif->type) {
1292        case NL80211_IFTYPE_STATION:
1293                rcu_read_lock();
1294                sta = ieee80211_find_sta(vif, bss_conf->bssid);
1295                if (!sta) {
1296                        /*
1297                         * If at all, this can only happen through a race
1298                         * when the AP disconnects us while we're still
1299                         * setting up the connection, in that case mac80211
1300                         * will soon tell us about that.
1301                         */
1302                        need_multiple = false;
1303                        rcu_read_unlock();
1304                        break;
1305                }
1306
1307                ht_cap = &sta->ht_cap;
1308
1309                need_multiple = true;
1310
1311                /*
1312                 * If the peer advertises no support for receiving 2 and 3
1313                 * stream MCS rates, it can't be transmitting them either.
1314                 */
1315                if (ht_cap->mcs.rx_mask[1] == 0 &&
1316                    ht_cap->mcs.rx_mask[2] == 0) {
1317                        need_multiple = false;
1318                } else if (!(ht_cap->mcs.tx_params &
1319                                                IEEE80211_HT_MCS_TX_DEFINED)) {
1320                        /* If it can't TX MCS at all ... */
1321                        need_multiple = false;
1322                } else if (ht_cap->mcs.tx_params &
1323                                                IEEE80211_HT_MCS_TX_RX_DIFF) {
1324                        int maxstreams;
1325
1326                        /*
1327                         * But if it can receive them, it might still not
1328                         * be able to transmit them, which is what we need
1329                         * to check here -- so check the number of streams
1330                         * it advertises for TX (if different from RX).
1331                         */
1332
1333                        maxstreams = (ht_cap->mcs.tx_params &
1334                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);
1335                        maxstreams >>=
1336                                IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1337                        maxstreams += 1;
1338
1339                        if (maxstreams <= 1)
1340                                need_multiple = false;
1341                }
1342
1343                rcu_read_unlock();
1344                break;
1345        case NL80211_IFTYPE_ADHOC:
1346                /* currently */
1347                need_multiple = false;
1348                break;
1349        default:
1350                /* only AP really */
1351                need_multiple = true;
1352                break;
1353        }
1354
1355        ctx->ht_need_multiple_chains = need_multiple;
1356
1357        if (!need_multiple) {
1358                /* check all contexts */
1359                for_each_context(priv, tmp) {
1360                        if (!tmp->vif)
1361                                continue;
1362                        if (tmp->ht_need_multiple_chains) {
1363                                need_multiple = true;
1364                                break;
1365                        }
1366                }
1367        }
1368
1369        ht_conf->single_chain_sufficient = !need_multiple;
1370}
1371
1372static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
1373{
1374        struct iwl_chain_noise_data *data = &priv->chain_noise_data;
1375        int ret;
1376
1377        if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)
1378                return;
1379
1380        if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
1381            iwl_is_any_associated(priv)) {
1382                struct iwl_calib_chain_noise_reset_cmd cmd;
1383
1384                /* clear data for chain noise calibration algorithm */
1385                data->chain_noise_a = 0;
1386                data->chain_noise_b = 0;
1387                data->chain_noise_c = 0;
1388                data->chain_signal_a = 0;
1389                data->chain_signal_b = 0;
1390                data->chain_signal_c = 0;
1391                data->beacon_count = 0;
1392
1393                memset(&cmd, 0, sizeof(cmd));
1394                iwl_set_calib_hdr(&cmd.hdr,
1395                        priv->phy_calib_chain_noise_reset_cmd);
1396                ret = iwl_dvm_send_cmd_pdu(priv,
1397                                        REPLY_PHY_CALIBRATION_CMD,
1398                                        0, sizeof(cmd), &cmd);
1399                if (ret)
1400                        IWL_ERR(priv,
1401                                "Could not send REPLY_PHY_CALIBRATION_CMD\n");
1402                data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1403                IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
1404        }
1405}
1406
1407void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
1408                             struct ieee80211_vif *vif,
1409                             struct ieee80211_bss_conf *bss_conf,
1410                             u32 changes)
1411{
1412        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1413        struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1414        int ret;
1415        bool force = false;
1416
1417        mutex_lock(&priv->mutex);
1418
1419        if (changes & BSS_CHANGED_IDLE && bss_conf->idle) {
1420                /*
1421                 * If we go idle, then clearly no "passive-no-rx"
1422                 * workaround is needed any more, this is a reset.
1423                 */
1424                iwlagn_lift_passive_no_rx(priv);
1425        }
1426
1427        if (unlikely(!iwl_is_ready(priv))) {
1428                IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
1429                mutex_unlock(&priv->mutex);
1430                return;
1431        }
1432
1433        if (unlikely(!ctx->vif)) {
1434                IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
1435                mutex_unlock(&priv->mutex);
1436                return;
1437        }
1438
1439        if (changes & BSS_CHANGED_BEACON_INT)
1440                force = true;
1441
1442        if (changes & BSS_CHANGED_QOS) {
1443                ctx->qos_data.qos_active = bss_conf->qos;
1444                iwlagn_update_qos(priv, ctx);
1445        }
1446
1447        ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1448        if (vif->bss_conf.use_short_preamble)
1449                ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1450        else
1451                ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1452
1453        if (changes & BSS_CHANGED_ASSOC) {
1454                if (bss_conf->assoc) {
1455                        priv->timestamp = bss_conf->sync_tsf;
1456                        ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1457                } else {
1458                        ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1459
1460                        if (ctx->ctxid == IWL_RXON_CTX_BSS)
1461                                priv->have_rekey_data = false;
1462                }
1463
1464                iwlagn_bt_coex_rssi_monitor(priv);
1465        }
1466
1467        if (ctx->ht.enabled) {
1468                ctx->ht.protection = bss_conf->ht_operation_mode &
1469                                        IEEE80211_HT_OP_MODE_PROTECTION;
1470                ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
1471                                        IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1472                iwlagn_check_needed_chains(priv, ctx, bss_conf);
1473                iwl_set_rxon_ht(priv, &priv->current_ht_config);
1474        }
1475
1476        iwlagn_set_rxon_chain(priv, ctx);
1477
1478        if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1479                ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
1480        else
1481                ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1482
1483        if (bss_conf->use_cts_prot)
1484                ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
1485        else
1486                ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
1487
1488        memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
1489
1490        if (vif->type == NL80211_IFTYPE_AP ||
1491            vif->type == NL80211_IFTYPE_ADHOC) {
1492                if (vif->bss_conf.enable_beacon) {
1493                        ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1494                        priv->beacon_ctx = ctx;
1495                } else {
1496                        ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1497                        priv->beacon_ctx = NULL;
1498                }
1499        }
1500
1501        /*
1502         * If the ucode decides to do beacon filtering before
1503         * association, it will lose beacons that are needed
1504         * before sending frames out on passive channels. This
1505         * causes association failures on those channels. Enable
1506         * receiving beacons in such cases.
1507         */
1508
1509        if (vif->type == NL80211_IFTYPE_STATION) {
1510                if (!bss_conf->assoc)
1511                        ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1512                else
1513                        ctx->staging.filter_flags &=
1514                                                    ~RXON_FILTER_BCON_AWARE_MSK;
1515        }
1516
1517        if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1518                iwlagn_commit_rxon(priv, ctx);
1519
1520        if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
1521                /*
1522                 * The chain noise calibration will enable PM upon
1523                 * completion. If calibration has already been run
1524                 * then we need to enable power management here.
1525                 */
1526                if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1527                        iwl_power_update_mode(priv, false);
1528
1529                /* Enable RX differential gain and sensitivity calibrations */
1530                iwlagn_chain_noise_reset(priv);
1531                priv->start_calib = 1;
1532        }
1533
1534        if (changes & BSS_CHANGED_IBSS) {
1535                ret = iwlagn_manage_ibss_station(priv, vif,
1536                                                 bss_conf->ibss_joined);
1537                if (ret)
1538                        IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1539                                bss_conf->ibss_joined ? "add" : "remove",
1540                                bss_conf->bssid);
1541        }
1542
1543        if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {
1544                if (iwlagn_update_beacon(priv, vif))
1545                        IWL_ERR(priv, "Error updating beacon\n");
1546        }
1547
1548        mutex_unlock(&priv->mutex);
1549}
1550
1551void iwlagn_post_scan(struct iwl_priv *priv)
1552{
1553        struct iwl_rxon_context *ctx;
1554
1555        /*
1556         * We do not commit power settings while scan is pending,
1557         * do it now if the settings changed.
1558         */
1559        iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);
1560        iwl_set_tx_power(priv, priv->tx_power_next, false);
1561
1562        /*
1563         * Since setting the RXON may have been deferred while
1564         * performing the scan, fire one off if needed
1565         */
1566        for_each_context(priv, ctx)
1567                if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1568                        iwlagn_commit_rxon(priv, ctx);
1569
1570        iwlagn_set_pan_params(priv);
1571}
1572