drivers/net/wireless/ath/ath9k/htc_drv_beacon.c

   1 /*
   2  * Copyright (c) 2010-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "htc.h"
  18
  19 #define FUDGE 2
  20
  21 void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv)
  22 {
  23         struct ath_hw *ah = priv->ah;
  24         struct ath9k_tx_queue_info qi, qi_be;
  25
  26         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
  27         memset(&qi_be, 0, sizeof(struct ath9k_tx_queue_info));
  28
  29         ath9k_hw_get_txq_props(ah, priv->beacon.beaconq, &qi);
  30
  31         if (priv->ah->opmode == NL80211_IFTYPE_AP ||
  32             priv->ah->opmode == NL80211_IFTYPE_MESH_POINT) {
  33                 qi.tqi_aifs = 1;
  34                 qi.tqi_cwmin = 0;
  35                 qi.tqi_cwmax = 0;
  36         } else if (priv->ah->opmode == NL80211_IFTYPE_ADHOC) {
  37                 int qnum = priv->hwq_map[IEEE80211_AC_BE];
  38
  39                 ath9k_hw_get_txq_props(ah, qnum, &qi_be);
  40
  41                 qi.tqi_aifs = qi_be.tqi_aifs;
  42
  43                 /*
  44                  * For WIFI Beacon Distribution
  45                  * Long slot time  : 2x cwmin
  46                  * Short slot time : 4x cwmin
  47                  */
  48                 if (ah->slottime == ATH9K_SLOT_TIME_20)
  49                         qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
  50                 else
  51                         qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
  52
  53                 qi.tqi_cwmax = qi_be.tqi_cwmax;
  54
  55         }
  56
  57         if (!ath9k_hw_set_txq_props(ah, priv->beacon.beaconq, &qi)) {
  58                 ath_err(ath9k_hw_common(ah),
  59                         "Unable to update beacon queue %u!\n", priv->beacon.beaconq);
  60         } else {
  61                 ath9k_hw_resettxqueue(ah, priv->beacon.beaconq);
  62         }
  63 }
  64
  65 /*
  66  * Both nexttbtt and intval have to be in usecs.
  67  */
  68 static void ath9k_htc_beacon_init(struct ath9k_htc_priv *priv,
  69                                   struct ath_beacon_config *conf,
  70                                   bool reset_tsf)
  71 {
  72         struct ath_hw *ah = priv->ah;
  73         int ret __attribute__ ((unused));
  74         __be32 htc_imask = 0;
  75         u8 cmd_rsp;
  76
  77         WMI_CMD(WMI_DISABLE_INTR_CMDID);
  78         if (reset_tsf)
  79                 ath9k_hw_reset_tsf(ah);
  80         ath9k_htc_beaconq_config(priv);
  81         ath9k_hw_beaconinit(ah, conf->nexttbtt, conf->intval);
  82         priv->beacon.bmisscnt = 0;
  83         htc_imask = cpu_to_be32(ah->imask);
  84         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
  85 }
  86
  87 static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv,
  88                                         struct ath_beacon_config *bss_conf)
  89 {
  90         struct ath9k_beacon_state bs;
  91         enum ath9k_int imask = 0;
  92         __be32 htc_imask = 0;
  93         int ret __attribute__ ((unused));
  94         u8 cmd_rsp;
  95
  96         if (ath9k_cmn_beacon_config_sta(priv->ah, bss_conf, &bs) == -EPERM)
  97                 return;
  98
  99         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 100         ath9k_hw_set_sta_beacon_timers(priv->ah, &bs);
 101         imask |= ATH9K_INT_BMISS;
 102         htc_imask = cpu_to_be32(imask);
 103         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 104 }
 105
 106 static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv,
 107                                        struct ath_beacon_config *bss_conf)
 108 {
 109         struct ath_common *common = ath9k_hw_common(priv->ah);
 110         u32 tsftu;
 111         int ret __attribute__ ((unused));
 112         u64 tsf;
 113
 114         bss_conf->intval = bss_conf->beacon_interval;
 115         bss_conf->intval /= ATH9K_HTC_MAX_BCN_VIF;
 116         bss_conf->nexttbtt = bss_conf->intval;
 117
 118         /*
 119          * To reduce beacon misses under heavy TX load,
 120          * set the beacon response time to a larger value.
 121          */
 122         if (bss_conf->intval > DEFAULT_SWBA_RESPONSE)
 123                 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
 124         else
 125                 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
 126
 127         if (test_bit(OP_TSF_RESET, &priv->op_flags)) {
 128                 ath9k_hw_reset_tsf(priv->ah);
 129                 clear_bit(OP_TSF_RESET, &priv->op_flags);
 130         } else {
 131                 /*
 132                  * Pull nexttbtt forward to reflect the current TSF.
 133                  */
 134                 tsf = ath9k_hw_gettsf64(priv->ah);
 135                 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
 136                 do {
 137                         bss_conf->nexttbtt += bss_conf->intval;
 138                 } while (bss_conf->nexttbtt < tsftu);
 139         }
 140
 141         if (bss_conf->enable_beacon)
 142                 priv->ah->imask = ATH9K_INT_SWBA;
 143
 144         ath_dbg(common, CONFIG,
 145                 "AP Beacon config, intval: %d, nexttbtt: %u, resp_time: %d imask: 0x%x\n",
 146                 bss_conf->beacon_interval, bss_conf->nexttbtt,
 147                 priv->ah->config.sw_beacon_response_time, priv->ah->imask);
 148
 149         ath9k_htc_beacon_init(priv, bss_conf, false);
 150 }
 151
 152 static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
 153                                           struct ath_beacon_config *bss_conf)
 154 {
 155         struct ath_common *common = ath9k_hw_common(priv->ah);
 156         enum ath9k_int imask = 0;
 157         u32 nexttbtt, intval, tsftu;
 158         __be32 htc_imask = 0;
 159         int ret __attribute__ ((unused));
 160         u8 cmd_rsp;
 161         u64 tsf;
 162
 163         intval = bss_conf->beacon_interval;
 164         nexttbtt = intval;
 165
 166         /*
 167          * Pull nexttbtt forward to reflect the current TSF.
 168          */
 169         tsf = ath9k_hw_gettsf64(priv->ah);
 170         tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
 171         do {
 172                 nexttbtt += intval;
 173         } while (nexttbtt < tsftu);
 174
 175         /*
 176          * Only one IBSS interfce is allowed.
 177          */
 178         if (intval > DEFAULT_SWBA_RESPONSE)
 179                 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
 180         else
 181                 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
 182
 183         if (bss_conf->enable_beacon)
 184                 imask |= ATH9K_INT_SWBA;
 185
 186         ath_dbg(common, CONFIG,
 187                 "IBSS Beacon config, intval: %d, nexttbtt: %u, resp_time: %d, imask: 0x%x\n",
 188                 bss_conf->beacon_interval, nexttbtt,
 189                 priv->ah->config.sw_beacon_response_time, imask);
 190
 191         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 192         ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
 193         priv->beacon.bmisscnt = 0;
 194         htc_imask = cpu_to_be32(imask);
 195         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 196 }
 197
 198 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
 199                         enum htc_endpoint_id ep_id, bool txok)
 200 {
 201         dev_kfree_skb_any(skb);
 202 }
 203
 204 static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv,
 205                                     int slot)
 206 {
 207         struct ath_common *common = ath9k_hw_common(priv->ah);
 208         struct ieee80211_vif *vif;
 209         struct sk_buff *skb;
 210         struct ieee80211_hdr *hdr;
 211         int padpos, padsize, ret, tx_slot;
 212
 213         spin_lock_bh(&priv->beacon_lock);
 214
 215         vif = priv->beacon.bslot[slot];
 216
 217         skb = ieee80211_get_buffered_bc(priv->hw, vif);
 218
 219         while(skb) {
 220                 hdr = (struct ieee80211_hdr *) skb->data;
 221
 222                 padpos = ieee80211_hdrlen(hdr->frame_control);
 223                 padsize = padpos & 3;
 224                 if (padsize && skb->len > padpos) {
 225                         if (skb_headroom(skb) < padsize) {
 226                                 dev_kfree_skb_any(skb);
 227                                 goto next;
 228                         }
 229                         skb_push(skb, padsize);
 230                         memmove(skb->data, skb->data + padsize, padpos);
 231                 }
 232
 233                 tx_slot = ath9k_htc_tx_get_slot(priv);
 234                 if (tx_slot < 0) {
 235                         ath_dbg(common, XMIT, "No free CAB slot\n");
 236                         dev_kfree_skb_any(skb);
 237                         goto next;
 238                 }
 239
 240                 ret = ath9k_htc_tx_start(priv, NULL, skb, tx_slot, true);
 241                 if (ret != 0) {
 242                         ath9k_htc_tx_clear_slot(priv, tx_slot);
 243                         dev_kfree_skb_any(skb);
 244
 245                         ath_dbg(common, XMIT, "Failed to send CAB frame\n");
 246                 } else {
 247                         spin_lock_bh(&priv->tx.tx_lock);
 248                         priv->tx.queued_cnt++;
 249                         spin_unlock_bh(&priv->tx.tx_lock);
 250                 }
 251         next:
 252                 skb = ieee80211_get_buffered_bc(priv->hw, vif);
 253         }
 254
 255         spin_unlock_bh(&priv->beacon_lock);
 256 }
 257
 258 static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
 259                                   int slot)
 260 {
 261         struct ath_common *common = ath9k_hw_common(priv->ah);
 262         struct ieee80211_vif *vif;
 263         struct ath9k_htc_vif *avp;
 264         struct tx_beacon_header beacon_hdr;
 265         struct ath9k_htc_tx_ctl *tx_ctl;
 266         struct ieee80211_tx_info *info;
 267         struct ieee80211_mgmt *mgmt;
 268         struct sk_buff *beacon;
 269         u8 *tx_fhdr;
 270         int ret;
 271
 272         memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
 273
 274         spin_lock_bh(&priv->beacon_lock);
 275
 276         vif = priv->beacon.bslot[slot];
 277         avp = (struct ath9k_htc_vif *)vif->drv_priv;
 278
 279         if (unlikely(test_bit(ATH_OP_SCANNING, &common->op_flags))) {
 280                 spin_unlock_bh(&priv->beacon_lock);
 281                 return;
 282         }
 283
 284         /* Get a new beacon */
 285         beacon = ieee80211_beacon_get(priv->hw, vif);
 286         if (!beacon) {
 287                 spin_unlock_bh(&priv->beacon_lock);
 288                 return;
 289         }
 290
 291         /*
 292          * Update the TSF adjust value here, the HW will
 293          * add this value for every beacon.
 294          */
 295         mgmt = (struct ieee80211_mgmt *)beacon->data;
 296         mgmt->u.beacon.timestamp = avp->tsfadjust;
 297
 298         info = IEEE80211_SKB_CB(beacon);
 299         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 300                 struct ieee80211_hdr *hdr =
 301                         (struct ieee80211_hdr *) beacon->data;
 302                 avp->seq_no += 0x10;
 303                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 304                 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
 305         }
 306
 307         tx_ctl = HTC_SKB_CB(beacon);
 308         memset(tx_ctl, 0, sizeof(*tx_ctl));
 309
 310         tx_ctl->type = ATH9K_HTC_BEACON;
 311         tx_ctl->epid = priv->beacon_ep;
 312
 313         beacon_hdr.vif_index = avp->index;
 314         tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
 315         memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
 316
 317         ret = htc_send(priv->htc, beacon);
 318         if (ret != 0) {
 319                 if (ret == -ENOMEM) {
 320                         ath_dbg(common, BSTUCK,
 321                                 "Failed to send beacon, no free TX buffer\n");
 322                 }
 323                 dev_kfree_skb_any(beacon);
 324         }
 325
 326         spin_unlock_bh(&priv->beacon_lock);
 327 }
 328
 329 static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
 330                                   struct wmi_event_swba *swba)
 331 {
 332         struct ath_common *common = ath9k_hw_common(priv->ah);
 333         u64 tsf;
 334         u32 tsftu;
 335         u16 intval;
 336         int slot;
 337
 338         intval = priv->cur_beacon_conf.beacon_interval;
 339
 340         tsf = be64_to_cpu(swba->tsf);
 341         tsftu = TSF_TO_TU(tsf >> 32, tsf);
 342         slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
 343         slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
 344
 345         ath_dbg(common, BEACON,
 346                 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
 347                 slot, tsf, tsftu, intval);
 348
 349         return slot;
 350 }
 351
 352 void ath9k_htc_swba(struct ath9k_htc_priv *priv,
 353                     struct wmi_event_swba *swba)
 354 {
 355         struct ath_common *common = ath9k_hw_common(priv->ah);
 356         int slot;
 357
 358         if (swba->beacon_pending != 0) {
 359                 priv->beacon.bmisscnt++;
 360                 if (priv->beacon.bmisscnt > BSTUCK_THRESHOLD) {
 361                         ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n");
 362                         ieee80211_queue_work(priv->hw,
 363                                              &priv->fatal_work);
 364                 }
 365                 return;
 366         }
 367
 368         if (priv->beacon.bmisscnt) {
 369                 ath_dbg(common, BSTUCK,
 370                         "Resuming beacon xmit after %u misses\n",
 371                         priv->beacon.bmisscnt);
 372                 priv->beacon.bmisscnt = 0;
 373         }
 374
 375         slot = ath9k_htc_choose_bslot(priv, swba);
 376         spin_lock_bh(&priv->beacon_lock);
 377         if (priv->beacon.bslot[slot] == NULL) {
 378                 spin_unlock_bh(&priv->beacon_lock);
 379                 return;
 380         }
 381         spin_unlock_bh(&priv->beacon_lock);
 382
 383         ath9k_htc_send_buffered(priv, slot);
 384         ath9k_htc_send_beacon(priv, slot);
 385 }
 386
 387 void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
 388                             struct ieee80211_vif *vif)
 389 {
 390         struct ath_common *common = ath9k_hw_common(priv->ah);
 391         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 392         int i = 0;
 393
 394         spin_lock_bh(&priv->beacon_lock);
 395         for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
 396                 if (priv->beacon.bslot[i] == NULL) {
 397                         avp->bslot = i;
 398                         break;
 399                 }
 400         }
 401
 402         priv->beacon.bslot[avp->bslot] = vif;
 403         spin_unlock_bh(&priv->beacon_lock);
 404
 405         ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
 406                 avp->bslot);
 407 }
 408
 409 void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
 410                             struct ieee80211_vif *vif)
 411 {
 412         struct ath_common *common = ath9k_hw_common(priv->ah);
 413         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 414
 415         spin_lock_bh(&priv->beacon_lock);
 416         priv->beacon.bslot[avp->bslot] = NULL;
 417         spin_unlock_bh(&priv->beacon_lock);
 418
 419         ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n",
 420                 avp->bslot);
 421 }
 422
 423 /*
 424  * Calculate the TSF adjustment value for all slots
 425  * other than zero.
 426  */
 427 void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
 428                              struct ieee80211_vif *vif)
 429 {
 430         struct ath_common *common = ath9k_hw_common(priv->ah);
 431         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 432         struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
 433         u64 tsfadjust;
 434
 435         if (avp->bslot == 0)
 436                 return;
 437
 438         /*
 439          * The beacon interval cannot be different for multi-AP mode,
 440          * and we reach here only for VIF slots greater than zero,
 441          * so beacon_interval is guaranteed to be set in cur_conf.
 442          */
 443         tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
 444         avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
 445
 446         ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
 447                 (unsigned long long)tsfadjust, avp->bslot);
 448 }
 449
 450 static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 451 {
 452         bool *beacon_configured = (bool *)data;
 453         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 454
 455         if (vif->type == NL80211_IFTYPE_STATION &&
 456             avp->beacon_configured)
 457                 *beacon_configured = true;
 458 }
 459
 460 static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
 461                                           struct ieee80211_vif *vif)
 462 {
 463         struct ath_common *common = ath9k_hw_common(priv->ah);
 464         struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
 465         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 466         bool beacon_configured;
 467
 468         /*
 469          * Changing the beacon interval when multiple AP interfaces
 470          * are configured will affect beacon transmission of all
 471          * of them.
 472          */
 473         if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
 474             (priv->num_ap_vif > 1) &&
 475             (vif->type == NL80211_IFTYPE_AP) &&
 476             (cur_conf->beacon_interval != bss_conf->beacon_int)) {
 477                 ath_dbg(common, CONFIG,
 478                         "Changing beacon interval of multiple AP interfaces !\n");
 479                 return false;
 480         }
 481
 482         /*
 483          * If the HW is operating in AP mode, any new station interfaces that
 484          * are added cannot change the beacon parameters.
 485          */
 486         if (priv->num_ap_vif &&
 487             (vif->type != NL80211_IFTYPE_AP)) {
 488                 ath_dbg(common, CONFIG,
 489                         "HW in AP mode, cannot set STA beacon parameters\n");
 490                 return false;
 491         }
 492
 493         /*
 494          * The beacon parameters are configured only for the first
 495          * station interface.
 496          */
 497         if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
 498             (priv->num_sta_vif > 1) &&
 499             (vif->type == NL80211_IFTYPE_STATION)) {
 500                 beacon_configured = false;
 501                 ieee80211_iterate_active_interfaces_atomic(
 502                         priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 503                         ath9k_htc_beacon_iter, &beacon_configured);
 504
 505                 if (beacon_configured) {
 506                         ath_dbg(common, CONFIG,
 507                                 "Beacon already configured for a station interface\n");
 508                         return false;
 509                 }
 510         }
 511
 512         return true;
 513 }
 514
 515 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
 516                              struct ieee80211_vif *vif)
 517 {
 518         struct ath_common *common = ath9k_hw_common(priv->ah);
 519         struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
 520         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 521         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 522
 523         if (!ath9k_htc_check_beacon_config(priv, vif))
 524                 return;
 525
 526         cur_conf->beacon_interval = bss_conf->beacon_int;
 527         if (cur_conf->beacon_interval == 0)
 528                 cur_conf->beacon_interval = 100;
 529
 530         cur_conf->dtim_period = bss_conf->dtim_period;
 531         cur_conf->bmiss_timeout =
 532                 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
 533
 534         switch (vif->type) {
 535         case NL80211_IFTYPE_STATION:
 536                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 537                 avp->beacon_configured = true;
 538                 break;
 539         case NL80211_IFTYPE_ADHOC:
 540                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 541                 break;
 542         case NL80211_IFTYPE_MESH_POINT:
 543         case NL80211_IFTYPE_AP:
 544                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 545                 break;
 546         default:
 547                 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
 548                 return;
 549         }
 550 }
 551
 552 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
 553 {
 554         struct ath_common *common = ath9k_hw_common(priv->ah);
 555         struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
 556
 557         switch (priv->ah->opmode) {
 558         case NL80211_IFTYPE_STATION:
 559                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 560                 break;
 561         case NL80211_IFTYPE_ADHOC:
 562                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 563                 break;
 564         case NL80211_IFTYPE_MESH_POINT:
 565         case NL80211_IFTYPE_AP:
 566                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 567                 break;
 568         default:
 569                 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
 570                 return;
 571         }
 572 }