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->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->beaconq, &qi)) {
  58                 ath_err(ath9k_hw_common(ah),
  59                         "Unable to update beacon queue %u!\n", priv->beaconq);
  60         } else {
  61                 ath9k_hw_resettxqueue(ah, priv->beaconq);
  62         }
  63 }
  64
  65
  66 static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv,
  67                                         struct htc_beacon_config *bss_conf)
  68 {
  69         struct ath_common *common = ath9k_hw_common(priv->ah);
  70         struct ath9k_beacon_state bs;
  71         enum ath9k_int imask = 0;
  72         int dtimperiod, dtimcount, sleepduration;
  73         int cfpperiod, cfpcount, bmiss_timeout;
  74         u32 nexttbtt = 0, intval, tsftu;
  75         __be32 htc_imask = 0;
  76         u64 tsf;
  77         int num_beacons, offset, dtim_dec_count, cfp_dec_count;
  78         int ret __attribute__ ((unused));
  79         u8 cmd_rsp;
  80
  81         memset(&bs, 0, sizeof(bs));
  82
  83         intval = bss_conf->beacon_interval;
  84         bmiss_timeout = (ATH_DEFAULT_BMISS_LIMIT * bss_conf->beacon_interval);
  85
  86         /*
  87          * Setup dtim and cfp parameters according to
  88          * last beacon we received (which may be none).
  89          */
  90         dtimperiod = bss_conf->dtim_period;
  91         if (dtimperiod <= 0)            /* NB: 0 if not known */
  92                 dtimperiod = 1;
  93         dtimcount = 1;
  94         if (dtimcount >= dtimperiod)    /* NB: sanity check */
  95                 dtimcount = 0;
  96         cfpperiod = 1;                  /* NB: no PCF support yet */
  97         cfpcount = 0;
  98
  99         sleepduration = intval;
 100         if (sleepduration <= 0)
 101                 sleepduration = intval;
 102
 103         /*
 104          * Pull nexttbtt forward to reflect the current
 105          * TSF and calculate dtim+cfp state for the result.
 106          */
 107         tsf = ath9k_hw_gettsf64(priv->ah);
 108         tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
 109
 110         num_beacons = tsftu / intval + 1;
 111         offset = tsftu % intval;
 112         nexttbtt = tsftu - offset;
 113         if (offset)
 114                 nexttbtt += intval;
 115
 116         /* DTIM Beacon every dtimperiod Beacon */
 117         dtim_dec_count = num_beacons % dtimperiod;
 118         /* CFP every cfpperiod DTIM Beacon */
 119         cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
 120         if (dtim_dec_count)
 121                 cfp_dec_count++;
 122
 123         dtimcount -= dtim_dec_count;
 124         if (dtimcount < 0)
 125                 dtimcount += dtimperiod;
 126
 127         cfpcount -= cfp_dec_count;
 128         if (cfpcount < 0)
 129                 cfpcount += cfpperiod;
 130
 131         bs.bs_intval = intval;
 132         bs.bs_nexttbtt = nexttbtt;
 133         bs.bs_dtimperiod = dtimperiod*intval;
 134         bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
 135         bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
 136         bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
 137         bs.bs_cfpmaxduration = 0;
 138
 139         /*
 140          * Calculate the number of consecutive beacons to miss* before taking
 141          * a BMISS interrupt. The configuration is specified in TU so we only
 142          * need calculate based on the beacon interval.  Note that we clamp the
 143          * result to at most 15 beacons.
 144          */
 145         if (sleepduration > intval) {
 146                 bs.bs_bmissthreshold = ATH_DEFAULT_BMISS_LIMIT / 2;
 147         } else {
 148                 bs.bs_bmissthreshold = DIV_ROUND_UP(bmiss_timeout, intval);
 149                 if (bs.bs_bmissthreshold > 15)
 150                         bs.bs_bmissthreshold = 15;
 151                 else if (bs.bs_bmissthreshold <= 0)
 152                         bs.bs_bmissthreshold = 1;
 153         }
 154
 155         /*
 156          * Calculate sleep duration. The configuration is given in ms.
 157          * We ensure a multiple of the beacon period is used. Also, if the sleep
 158          * duration is greater than the DTIM period then it makes senses
 159          * to make it a multiple of that.
 160          *
 161          * XXX fixed at 100ms
 162          */
 163
 164         bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
 165         if (bs.bs_sleepduration > bs.bs_dtimperiod)
 166                 bs.bs_sleepduration = bs.bs_dtimperiod;
 167
 168         /* TSF out of range threshold fixed at 1 second */
 169         bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
 170
 171         ath_dbg(common, CONFIG, "intval: %u tsf: %llu tsftu: %u\n",
 172                 intval, tsf, tsftu);
 173         ath_dbg(common, CONFIG,
 174                 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
 175                 bs.bs_bmissthreshold, bs.bs_sleepduration,
 176                 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
 177
 178         /* Set the computed STA beacon timers */
 179
 180         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 181         ath9k_hw_set_sta_beacon_timers(priv->ah, &bs);
 182         imask |= ATH9K_INT_BMISS;
 183         htc_imask = cpu_to_be32(imask);
 184         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 185 }
 186
 187 static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv,
 188                                        struct htc_beacon_config *bss_conf)
 189 {
 190         struct ath_common *common = ath9k_hw_common(priv->ah);
 191         enum ath9k_int imask = 0;
 192         u32 nexttbtt, intval, tsftu;
 193         __be32 htc_imask = 0;
 194         int ret __attribute__ ((unused));
 195         u8 cmd_rsp;
 196         u64 tsf;
 197
 198         intval = bss_conf->beacon_interval;
 199         intval /= ATH9K_HTC_MAX_BCN_VIF;
 200         nexttbtt = intval;
 201
 202         /*
 203          * To reduce beacon misses under heavy TX load,
 204          * set the beacon response time to a larger value.
 205          */
 206         if (intval > DEFAULT_SWBA_RESPONSE)
 207                 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
 208         else
 209                 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
 210
 211         if (test_bit(OP_TSF_RESET, &priv->op_flags)) {
 212                 ath9k_hw_reset_tsf(priv->ah);
 213                 clear_bit(OP_TSF_RESET, &priv->op_flags);
 214         } else {
 215                 /*
 216                  * Pull nexttbtt forward to reflect the current TSF.
 217                  */
 218                 tsf = ath9k_hw_gettsf64(priv->ah);
 219                 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
 220                 do {
 221                         nexttbtt += intval;
 222                 } while (nexttbtt < tsftu);
 223         }
 224
 225         if (test_bit(OP_ENABLE_BEACON, &priv->op_flags))
 226                 imask |= ATH9K_INT_SWBA;
 227
 228         ath_dbg(common, CONFIG,
 229                 "AP Beacon config, intval: %d, nexttbtt: %u, resp_time: %d imask: 0x%x\n",
 230                 bss_conf->beacon_interval, nexttbtt,
 231                 priv->ah->config.sw_beacon_response_time, imask);
 232
 233         ath9k_htc_beaconq_config(priv);
 234
 235         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 236         ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
 237         priv->cur_beacon_conf.bmiss_cnt = 0;
 238         htc_imask = cpu_to_be32(imask);
 239         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 240 }
 241
 242 static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
 243                                           struct htc_beacon_config *bss_conf)
 244 {
 245         struct ath_common *common = ath9k_hw_common(priv->ah);
 246         enum ath9k_int imask = 0;
 247         u32 nexttbtt, intval, tsftu;
 248         __be32 htc_imask = 0;
 249         int ret __attribute__ ((unused));
 250         u8 cmd_rsp;
 251         u64 tsf;
 252
 253         intval = bss_conf->beacon_interval;
 254         nexttbtt = intval;
 255
 256         /*
 257          * Pull nexttbtt forward to reflect the current TSF.
 258          */
 259         tsf = ath9k_hw_gettsf64(priv->ah);
 260         tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
 261         do {
 262                 nexttbtt += intval;
 263         } while (nexttbtt < tsftu);
 264
 265         /*
 266          * Only one IBSS interfce is allowed.
 267          */
 268         if (intval > DEFAULT_SWBA_RESPONSE)
 269                 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
 270         else
 271                 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
 272
 273         if (test_bit(OP_ENABLE_BEACON, &priv->op_flags))
 274                 imask |= ATH9K_INT_SWBA;
 275
 276         ath_dbg(common, CONFIG,
 277                 "IBSS Beacon config, intval: %d, nexttbtt: %u, resp_time: %d, imask: 0x%x\n",
 278                 bss_conf->beacon_interval, nexttbtt,
 279                 priv->ah->config.sw_beacon_response_time, imask);
 280
 281         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 282         ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
 283         priv->cur_beacon_conf.bmiss_cnt = 0;
 284         htc_imask = cpu_to_be32(imask);
 285         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 286 }
 287
 288 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
 289                         enum htc_endpoint_id ep_id, bool txok)
 290 {
 291         dev_kfree_skb_any(skb);
 292 }
 293
 294 static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv,
 295                                     int slot)
 296 {
 297         struct ath_common *common = ath9k_hw_common(priv->ah);
 298         struct ieee80211_vif *vif;
 299         struct sk_buff *skb;
 300         struct ieee80211_hdr *hdr;
 301         int padpos, padsize, ret, tx_slot;
 302
 303         spin_lock_bh(&priv->beacon_lock);
 304
 305         vif = priv->cur_beacon_conf.bslot[slot];
 306
 307         skb = ieee80211_get_buffered_bc(priv->hw, vif);
 308
 309         while(skb) {
 310                 hdr = (struct ieee80211_hdr *) skb->data;
 311
 312                 padpos = ieee80211_hdrlen(hdr->frame_control);
 313                 padsize = padpos & 3;
 314                 if (padsize && skb->len > padpos) {
 315                         if (skb_headroom(skb) < padsize) {
 316                                 dev_kfree_skb_any(skb);
 317                                 goto next;
 318                         }
 319                         skb_push(skb, padsize);
 320                         memmove(skb->data, skb->data + padsize, padpos);
 321                 }
 322
 323                 tx_slot = ath9k_htc_tx_get_slot(priv);
 324                 if (tx_slot < 0) {
 325                         ath_dbg(common, XMIT, "No free CAB slot\n");
 326                         dev_kfree_skb_any(skb);
 327                         goto next;
 328                 }
 329
 330                 ret = ath9k_htc_tx_start(priv, NULL, skb, tx_slot, true);
 331                 if (ret != 0) {
 332                         ath9k_htc_tx_clear_slot(priv, tx_slot);
 333                         dev_kfree_skb_any(skb);
 334
 335                         ath_dbg(common, XMIT, "Failed to send CAB frame\n");
 336                 } else {
 337                         spin_lock_bh(&priv->tx.tx_lock);
 338                         priv->tx.queued_cnt++;
 339                         spin_unlock_bh(&priv->tx.tx_lock);
 340                 }
 341         next:
 342                 skb = ieee80211_get_buffered_bc(priv->hw, vif);
 343         }
 344
 345         spin_unlock_bh(&priv->beacon_lock);
 346 }
 347
 348 static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
 349                                   int slot)
 350 {
 351         struct ath_common *common = ath9k_hw_common(priv->ah);
 352         struct ieee80211_vif *vif;
 353         struct ath9k_htc_vif *avp;
 354         struct tx_beacon_header beacon_hdr;
 355         struct ath9k_htc_tx_ctl *tx_ctl;
 356         struct ieee80211_tx_info *info;
 357         struct ieee80211_mgmt *mgmt;
 358         struct sk_buff *beacon;
 359         u8 *tx_fhdr;
 360         int ret;
 361
 362         memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
 363
 364         spin_lock_bh(&priv->beacon_lock);
 365
 366         vif = priv->cur_beacon_conf.bslot[slot];
 367         avp = (struct ath9k_htc_vif *)vif->drv_priv;
 368
 369         if (unlikely(test_bit(OP_SCANNING, &priv->op_flags))) {
 370                 spin_unlock_bh(&priv->beacon_lock);
 371                 return;
 372         }
 373
 374         /* Get a new beacon */
 375         beacon = ieee80211_beacon_get(priv->hw, vif);
 376         if (!beacon) {
 377                 spin_unlock_bh(&priv->beacon_lock);
 378                 return;
 379         }
 380
 381         /*
 382          * Update the TSF adjust value here, the HW will
 383          * add this value for every beacon.
 384          */
 385         mgmt = (struct ieee80211_mgmt *)beacon->data;
 386         mgmt->u.beacon.timestamp = avp->tsfadjust;
 387
 388         info = IEEE80211_SKB_CB(beacon);
 389         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 390                 struct ieee80211_hdr *hdr =
 391                         (struct ieee80211_hdr *) beacon->data;
 392                 avp->seq_no += 0x10;
 393                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 394                 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
 395         }
 396
 397         tx_ctl = HTC_SKB_CB(beacon);
 398         memset(tx_ctl, 0, sizeof(*tx_ctl));
 399
 400         tx_ctl->type = ATH9K_HTC_BEACON;
 401         tx_ctl->epid = priv->beacon_ep;
 402
 403         beacon_hdr.vif_index = avp->index;
 404         tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
 405         memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
 406
 407         ret = htc_send(priv->htc, beacon);
 408         if (ret != 0) {
 409                 if (ret == -ENOMEM) {
 410                         ath_dbg(common, BSTUCK,
 411                                 "Failed to send beacon, no free TX buffer\n");
 412                 }
 413                 dev_kfree_skb_any(beacon);
 414         }
 415
 416         spin_unlock_bh(&priv->beacon_lock);
 417 }
 418
 419 static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
 420                                   struct wmi_event_swba *swba)
 421 {
 422         struct ath_common *common = ath9k_hw_common(priv->ah);
 423         u64 tsf;
 424         u32 tsftu;
 425         u16 intval;
 426         int slot;
 427
 428         intval = priv->cur_beacon_conf.beacon_interval;
 429
 430         tsf = be64_to_cpu(swba->tsf);
 431         tsftu = TSF_TO_TU(tsf >> 32, tsf);
 432         slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
 433         slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
 434
 435         ath_dbg(common, BEACON,
 436                 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
 437                 slot, tsf, tsftu, intval);
 438
 439         return slot;
 440 }
 441
 442 void ath9k_htc_swba(struct ath9k_htc_priv *priv,
 443                     struct wmi_event_swba *swba)
 444 {
 445         struct ath_common *common = ath9k_hw_common(priv->ah);
 446         int slot;
 447
 448         if (swba->beacon_pending != 0) {
 449                 priv->cur_beacon_conf.bmiss_cnt++;
 450                 if (priv->cur_beacon_conf.bmiss_cnt > BSTUCK_THRESHOLD) {
 451                         ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n");
 452                         ieee80211_queue_work(priv->hw,
 453                                              &priv->fatal_work);
 454                 }
 455                 return;
 456         }
 457
 458         if (priv->cur_beacon_conf.bmiss_cnt) {
 459                 ath_dbg(common, BSTUCK,
 460                         "Resuming beacon xmit after %u misses\n",
 461                         priv->cur_beacon_conf.bmiss_cnt);
 462                 priv->cur_beacon_conf.bmiss_cnt = 0;
 463         }
 464
 465         slot = ath9k_htc_choose_bslot(priv, swba);
 466         spin_lock_bh(&priv->beacon_lock);
 467         if (priv->cur_beacon_conf.bslot[slot] == NULL) {
 468                 spin_unlock_bh(&priv->beacon_lock);
 469                 return;
 470         }
 471         spin_unlock_bh(&priv->beacon_lock);
 472
 473         ath9k_htc_send_buffered(priv, slot);
 474         ath9k_htc_send_beacon(priv, slot);
 475 }
 476
 477 void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
 478                             struct ieee80211_vif *vif)
 479 {
 480         struct ath_common *common = ath9k_hw_common(priv->ah);
 481         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 482         int i = 0;
 483
 484         spin_lock_bh(&priv->beacon_lock);
 485         for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
 486                 if (priv->cur_beacon_conf.bslot[i] == NULL) {
 487                         avp->bslot = i;
 488                         break;
 489                 }
 490         }
 491
 492         priv->cur_beacon_conf.bslot[avp->bslot] = vif;
 493         spin_unlock_bh(&priv->beacon_lock);
 494
 495         ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
 496                 avp->bslot);
 497 }
 498
 499 void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
 500                             struct ieee80211_vif *vif)
 501 {
 502         struct ath_common *common = ath9k_hw_common(priv->ah);
 503         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 504
 505         spin_lock_bh(&priv->beacon_lock);
 506         priv->cur_beacon_conf.bslot[avp->bslot] = NULL;
 507         spin_unlock_bh(&priv->beacon_lock);
 508
 509         ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n",
 510                 avp->bslot);
 511 }
 512
 513 /*
 514  * Calculate the TSF adjustment value for all slots
 515  * other than zero.
 516  */
 517 void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
 518                              struct ieee80211_vif *vif)
 519 {
 520         struct ath_common *common = ath9k_hw_common(priv->ah);
 521         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 522         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 523         u64 tsfadjust;
 524
 525         if (avp->bslot == 0)
 526                 return;
 527
 528         /*
 529          * The beacon interval cannot be different for multi-AP mode,
 530          * and we reach here only for VIF slots greater than zero,
 531          * so beacon_interval is guaranteed to be set in cur_conf.
 532          */
 533         tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
 534         avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
 535
 536         ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
 537                 (unsigned long long)tsfadjust, avp->bslot);
 538 }
 539
 540 static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 541 {
 542         bool *beacon_configured = (bool *)data;
 543         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 544
 545         if (vif->type == NL80211_IFTYPE_STATION &&
 546             avp->beacon_configured)
 547                 *beacon_configured = true;
 548 }
 549
 550 static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
 551                                           struct ieee80211_vif *vif)
 552 {
 553         struct ath_common *common = ath9k_hw_common(priv->ah);
 554         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 555         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 556         bool beacon_configured;
 557
 558         /*
 559          * Changing the beacon interval when multiple AP interfaces
 560          * are configured will affect beacon transmission of all
 561          * of them.
 562          */
 563         if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
 564             (priv->num_ap_vif > 1) &&
 565             (vif->type == NL80211_IFTYPE_AP) &&
 566             (cur_conf->beacon_interval != bss_conf->beacon_int)) {
 567                 ath_dbg(common, CONFIG,
 568                         "Changing beacon interval of multiple AP interfaces !\n");
 569                 return false;
 570         }
 571
 572         /*
 573          * If the HW is operating in AP mode, any new station interfaces that
 574          * are added cannot change the beacon parameters.
 575          */
 576         if (priv->num_ap_vif &&
 577             (vif->type != NL80211_IFTYPE_AP)) {
 578                 ath_dbg(common, CONFIG,
 579                         "HW in AP mode, cannot set STA beacon parameters\n");
 580                 return false;
 581         }
 582
 583         /*
 584          * The beacon parameters are configured only for the first
 585          * station interface.
 586          */
 587         if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
 588             (priv->num_sta_vif > 1) &&
 589             (vif->type == NL80211_IFTYPE_STATION)) {
 590                 beacon_configured = false;
 591                 ieee80211_iterate_active_interfaces_atomic(
 592                         priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 593                         ath9k_htc_beacon_iter, &beacon_configured);
 594
 595                 if (beacon_configured) {
 596                         ath_dbg(common, CONFIG,
 597                                 "Beacon already configured for a station interface\n");
 598                         return false;
 599                 }
 600         }
 601
 602         return true;
 603 }
 604
 605 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
 606                              struct ieee80211_vif *vif)
 607 {
 608         struct ath_common *common = ath9k_hw_common(priv->ah);
 609         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 610         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 611         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 612
 613         if (!ath9k_htc_check_beacon_config(priv, vif))
 614                 return;
 615
 616         cur_conf->beacon_interval = bss_conf->beacon_int;
 617         if (cur_conf->beacon_interval == 0)
 618                 cur_conf->beacon_interval = 100;
 619
 620         cur_conf->dtim_period = bss_conf->dtim_period;
 621         cur_conf->bmiss_timeout =
 622                 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
 623
 624         switch (vif->type) {
 625         case NL80211_IFTYPE_STATION:
 626                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 627                 avp->beacon_configured = true;
 628                 break;
 629         case NL80211_IFTYPE_ADHOC:
 630                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 631                 break;
 632         case NL80211_IFTYPE_MESH_POINT:
 633         case NL80211_IFTYPE_AP:
 634                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 635                 break;
 636         default:
 637                 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
 638                 return;
 639         }
 640 }
 641
 642 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
 643 {
 644         struct ath_common *common = ath9k_hw_common(priv->ah);
 645         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 646
 647         switch (priv->ah->opmode) {
 648         case NL80211_IFTYPE_STATION:
 649                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 650                 break;
 651         case NL80211_IFTYPE_ADHOC:
 652                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 653                 break;
 654         case NL80211_IFTYPE_MESH_POINT:
 655         case NL80211_IFTYPE_AP:
 656                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 657                 break;
 658         default:
 659                 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
 660                 return;
 661         }
 662 }