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

   1 /*
   2  * Copyright (c) 2010 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                 qi.tqi_aifs = 1;
  33                 qi.tqi_cwmin = 0;
  34                 qi.tqi_cwmax = 0;
  35         } else if (priv->ah->opmode == NL80211_IFTYPE_ADHOC) {
  36                 int qnum = priv->hwq_map[WME_AC_BE];
  37
  38                 ath9k_hw_get_txq_props(ah, qnum, &qi_be);
  39
  40                 qi.tqi_aifs = qi_be.tqi_aifs;
  41
  42                 /*
  43                  * For WIFI Beacon Distribution
  44                  * Long slot time  : 2x cwmin
  45                  * Short slot time : 4x cwmin
  46                  */
  47                 if (ah->slottime == ATH9K_SLOT_TIME_20)
  48                         qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
  49                 else
  50                         qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
  51
  52                 qi.tqi_cwmax = qi_be.tqi_cwmax;
  53
  54         }
  55
  56         if (!ath9k_hw_set_txq_props(ah, priv->beaconq, &qi)) {
  57                 ath_err(ath9k_hw_common(ah),
  58                         "Unable to update beacon queue %u!\n", priv->beaconq);
  59         } else {
  60                 ath9k_hw_resettxqueue(ah, priv->beaconq);
  61         }
  62 }
  63
  64
  65 static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv,
  66                                         struct htc_beacon_config *bss_conf)
  67 {
  68         struct ath_common *common = ath9k_hw_common(priv->ah);
  69         struct ath9k_beacon_state bs;
  70         enum ath9k_int imask = 0;
  71         int dtimperiod, dtimcount, sleepduration;
  72         int cfpperiod, cfpcount, bmiss_timeout;
  73         u32 nexttbtt = 0, intval, tsftu;
  74         __be32 htc_imask = 0;
  75         u64 tsf;
  76         int num_beacons, offset, dtim_dec_count, cfp_dec_count;
  77         int ret;
  78         u8 cmd_rsp;
  79
  80         memset(&bs, 0, sizeof(bs));
  81
  82         intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
  83         bmiss_timeout = (ATH_DEFAULT_BMISS_LIMIT * bss_conf->beacon_interval);
  84
  85         /*
  86          * Setup dtim and cfp parameters according to
  87          * last beacon we received (which may be none).
  88          */
  89         dtimperiod = bss_conf->dtim_period;
  90         if (dtimperiod <= 0)            /* NB: 0 if not known */
  91                 dtimperiod = 1;
  92         dtimcount = 1;
  93         if (dtimcount >= dtimperiod)    /* NB: sanity check */
  94                 dtimcount = 0;
  95         cfpperiod = 1;                  /* NB: no PCF support yet */
  96         cfpcount = 0;
  97
  98         sleepduration = intval;
  99         if (sleepduration <= 0)
 100                 sleepduration = intval;
 101
 102         /*
 103          * Pull nexttbtt forward to reflect the current
 104          * TSF and calculate dtim+cfp state for the result.
 105          */
 106         tsf = ath9k_hw_gettsf64(priv->ah);
 107         tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
 108
 109         num_beacons = tsftu / intval + 1;
 110         offset = tsftu % intval;
 111         nexttbtt = tsftu - offset;
 112         if (offset)
 113                 nexttbtt += intval;
 114
 115         /* DTIM Beacon every dtimperiod Beacon */
 116         dtim_dec_count = num_beacons % dtimperiod;
 117         /* CFP every cfpperiod DTIM Beacon */
 118         cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
 119         if (dtim_dec_count)
 120                 cfp_dec_count++;
 121
 122         dtimcount -= dtim_dec_count;
 123         if (dtimcount < 0)
 124                 dtimcount += dtimperiod;
 125
 126         cfpcount -= cfp_dec_count;
 127         if (cfpcount < 0)
 128                 cfpcount += cfpperiod;
 129
 130         bs.bs_intval = intval;
 131         bs.bs_nexttbtt = nexttbtt;
 132         bs.bs_dtimperiod = dtimperiod*intval;
 133         bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
 134         bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
 135         bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
 136         bs.bs_cfpmaxduration = 0;
 137
 138         /*
 139          * Calculate the number of consecutive beacons to miss* before taking
 140          * a BMISS interrupt. The configuration is specified in TU so we only
 141          * need calculate based on the beacon interval.  Note that we clamp the
 142          * result to at most 15 beacons.
 143          */
 144         if (sleepduration > intval) {
 145                 bs.bs_bmissthreshold = ATH_DEFAULT_BMISS_LIMIT / 2;
 146         } else {
 147                 bs.bs_bmissthreshold = DIV_ROUND_UP(bmiss_timeout, intval);
 148                 if (bs.bs_bmissthreshold > 15)
 149                         bs.bs_bmissthreshold = 15;
 150                 else if (bs.bs_bmissthreshold <= 0)
 151                         bs.bs_bmissthreshold = 1;
 152         }
 153
 154         /*
 155          * Calculate sleep duration. The configuration is given in ms.
 156          * We ensure a multiple of the beacon period is used. Also, if the sleep
 157          * duration is greater than the DTIM period then it makes senses
 158          * to make it a multiple of that.
 159          *
 160          * XXX fixed at 100ms
 161          */
 162
 163         bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
 164         if (bs.bs_sleepduration > bs.bs_dtimperiod)
 165                 bs.bs_sleepduration = bs.bs_dtimperiod;
 166
 167         /* TSF out of range threshold fixed at 1 second */
 168         bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
 169
 170         ath_dbg(common, ATH_DBG_CONFIG, "intval: %u tsf: %llu tsftu: %u\n",
 171                 intval, tsf, tsftu);
 172         ath_dbg(common, ATH_DBG_CONFIG,
 173                 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
 174                 bs.bs_bmissthreshold, bs.bs_sleepduration,
 175                 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
 176
 177         /* Set the computed STA beacon timers */
 178
 179         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 180         ath9k_hw_set_sta_beacon_timers(priv->ah, &bs);
 181         imask |= ATH9K_INT_BMISS;
 182         htc_imask = cpu_to_be32(imask);
 183         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 184 }
 185
 186 static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv,
 187                                        struct htc_beacon_config *bss_conf)
 188 {
 189         struct ath_common *common = ath9k_hw_common(priv->ah);
 190         enum ath9k_int imask = 0;
 191         u32 nexttbtt, intval, tsftu;
 192         __be32 htc_imask = 0;
 193         int ret;
 194         u8 cmd_rsp;
 195         u64 tsf;
 196
 197         intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
 198         intval /= ATH9K_HTC_MAX_BCN_VIF;
 199         nexttbtt = intval;
 200
 201         /*
 202          * To reduce beacon misses under heavy TX load,
 203          * set the beacon response time to a larger value.
 204          */
 205         if (intval > DEFAULT_SWBA_RESPONSE)
 206                 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
 207         else
 208                 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
 209
 210         if (priv->op_flags & OP_TSF_RESET) {
 211                 ath9k_hw_reset_tsf(priv->ah);
 212                 priv->op_flags &= ~OP_TSF_RESET;
 213         } else {
 214                 /*
 215                  * Pull nexttbtt forward to reflect the current TSF.
 216                  */
 217                 tsf = ath9k_hw_gettsf64(priv->ah);
 218                 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
 219                 do {
 220                         nexttbtt += intval;
 221                 } while (nexttbtt < tsftu);
 222         }
 223
 224         if (priv->op_flags & OP_ENABLE_BEACON)
 225                 imask |= ATH9K_INT_SWBA;
 226
 227         ath_dbg(common, ATH_DBG_CONFIG,
 228                 "AP Beacon config, intval: %d, nexttbtt: %u, resp_time: %d "
 229                 "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;
 250         u8 cmd_rsp;
 251         u64 tsf;
 252
 253         intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
 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 (priv->op_flags & OP_ENABLE_BEACON)
 274                 imask |= ATH9K_INT_SWBA;
 275
 276         ath_dbg(common, ATH_DBG_CONFIG,
 277                 "IBSS Beacon config, intval: %d, nexttbtt: %u, "
 278                 "resp_time: %d, imask: 0x%x\n",
 279                 bss_conf->beacon_interval, nexttbtt,
 280                 priv->ah->config.sw_beacon_response_time, imask);
 281
 282         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 283         ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
 284         priv->cur_beacon_conf.bmiss_cnt = 0;
 285         htc_imask = cpu_to_be32(imask);
 286         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 287 }
 288
 289 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
 290                         enum htc_endpoint_id ep_id, bool txok)
 291 {
 292         dev_kfree_skb_any(skb);
 293 }
 294
 295 static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv,
 296                                     int slot)
 297 {
 298         struct ath_common *common = ath9k_hw_common(priv->ah);
 299         struct ieee80211_vif *vif;
 300         struct sk_buff *skb;
 301         struct ieee80211_hdr *hdr;
 302         int padpos, padsize, ret;
 303
 304         spin_lock_bh(&priv->beacon_lock);
 305
 306         vif = priv->cur_beacon_conf.bslot[slot];
 307
 308         skb = ieee80211_get_buffered_bc(priv->hw, vif);
 309
 310         while(skb) {
 311                 hdr = (struct ieee80211_hdr *) skb->data;
 312
 313                 padpos = ath9k_cmn_padpos(hdr->frame_control);
 314                 padsize = padpos & 3;
 315                 if (padsize && skb->len > padpos) {
 316                         if (skb_headroom(skb) < padsize) {
 317                                 dev_kfree_skb_any(skb);
 318                                 goto next;
 319                         }
 320                         skb_push(skb, padsize);
 321                         memmove(skb->data, skb->data + padsize, padpos);
 322                 }
 323
 324                 ret = ath9k_htc_tx_start(priv, skb, true);
 325                 if (ret != 0) {
 326                         ath_dbg(common, ATH_DBG_FATAL,
 327                                 "Failed to send CAB frame\n");
 328                         dev_kfree_skb_any(skb);
 329                 } else {
 330                         spin_lock_bh(&priv->tx.tx_lock);
 331                         priv->tx.queued_cnt++;
 332                         spin_unlock_bh(&priv->tx.tx_lock);
 333                 }
 334         next:
 335                 skb = ieee80211_get_buffered_bc(priv->hw, vif);
 336         }
 337
 338         spin_unlock_bh(&priv->beacon_lock);
 339 }
 340
 341 static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
 342                                   int slot)
 343 {
 344         struct ath_common *common = ath9k_hw_common(priv->ah);
 345         struct ieee80211_vif *vif;
 346         struct ath9k_htc_vif *avp;
 347         struct tx_beacon_header beacon_hdr;
 348         struct ath9k_htc_tx_ctl *tx_ctl;
 349         struct ieee80211_tx_info *info;
 350         struct ieee80211_mgmt *mgmt;
 351         struct sk_buff *beacon;
 352         u8 *tx_fhdr;
 353         int ret;
 354
 355         memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
 356
 357         spin_lock_bh(&priv->beacon_lock);
 358
 359         vif = priv->cur_beacon_conf.bslot[slot];
 360         avp = (struct ath9k_htc_vif *)vif->drv_priv;
 361
 362         if (unlikely(priv->op_flags & OP_SCANNING)) {
 363                 spin_unlock_bh(&priv->beacon_lock);
 364                 return;
 365         }
 366
 367         /* Get a new beacon */
 368         beacon = ieee80211_beacon_get(priv->hw, vif);
 369         if (!beacon) {
 370                 spin_unlock_bh(&priv->beacon_lock);
 371                 return;
 372         }
 373
 374         /*
 375          * Update the TSF adjust value here, the HW will
 376          * add this value for every beacon.
 377          */
 378         mgmt = (struct ieee80211_mgmt *)beacon->data;
 379         mgmt->u.beacon.timestamp = avp->tsfadjust;
 380
 381         info = IEEE80211_SKB_CB(beacon);
 382         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 383                 struct ieee80211_hdr *hdr =
 384                         (struct ieee80211_hdr *) beacon->data;
 385                 avp->seq_no += 0x10;
 386                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 387                 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
 388         }
 389
 390         tx_ctl = HTC_SKB_CB(beacon);
 391         memset(tx_ctl, 0, sizeof(*tx_ctl));
 392
 393         tx_ctl->type = ATH9K_HTC_BEACON;
 394
 395         beacon_hdr.vif_index = avp->index;
 396         tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
 397         memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
 398
 399         ret = htc_send(priv->htc, beacon, priv->beacon_ep);
 400         if (ret != 0) {
 401                 if (ret == -ENOMEM) {
 402                         ath_dbg(common, ATH_DBG_BSTUCK,
 403                                 "Failed to send beacon, no free TX buffer\n");
 404                 }
 405                 dev_kfree_skb_any(beacon);
 406         }
 407
 408         spin_unlock_bh(&priv->beacon_lock);
 409 }
 410
 411 static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
 412                                   struct wmi_event_swba *swba)
 413 {
 414         struct ath_common *common = ath9k_hw_common(priv->ah);
 415         u64 tsf;
 416         u32 tsftu;
 417         u16 intval;
 418         int slot;
 419
 420         intval = priv->cur_beacon_conf.beacon_interval & ATH9K_BEACON_PERIOD;
 421
 422         tsf = be64_to_cpu(swba->tsf);
 423         tsftu = TSF_TO_TU(tsf >> 32, tsf);
 424         slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
 425         slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
 426
 427         ath_dbg(common, ATH_DBG_BEACON,
 428                 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
 429                 slot, tsf, tsftu, intval);
 430
 431         return slot;
 432 }
 433
 434 void ath9k_htc_swba(struct ath9k_htc_priv *priv,
 435                     struct wmi_event_swba *swba)
 436 {
 437         struct ath_common *common = ath9k_hw_common(priv->ah);
 438         int slot;
 439
 440         if (swba->beacon_pending != 0) {
 441                 priv->cur_beacon_conf.bmiss_cnt++;
 442                 if (priv->cur_beacon_conf.bmiss_cnt > BSTUCK_THRESHOLD) {
 443                         ath_dbg(common, ATH_DBG_BSTUCK,
 444                                 "Beacon stuck, HW reset\n");
 445                         ieee80211_queue_work(priv->hw,
 446                                              &priv->fatal_work);
 447                 }
 448                 return;
 449         }
 450
 451         if (priv->cur_beacon_conf.bmiss_cnt) {
 452                 ath_dbg(common, ATH_DBG_BSTUCK,
 453                         "Resuming beacon xmit after %u misses\n",
 454                         priv->cur_beacon_conf.bmiss_cnt);
 455                 priv->cur_beacon_conf.bmiss_cnt = 0;
 456         }
 457
 458         slot = ath9k_htc_choose_bslot(priv, swba);
 459         spin_lock_bh(&priv->beacon_lock);
 460         if (priv->cur_beacon_conf.bslot[slot] == NULL) {
 461                 spin_unlock_bh(&priv->beacon_lock);
 462                 return;
 463         }
 464         spin_unlock_bh(&priv->beacon_lock);
 465
 466         ath9k_htc_send_buffered(priv, slot);
 467         ath9k_htc_send_beacon(priv, slot);
 468 }
 469
 470 void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
 471                             struct ieee80211_vif *vif)
 472 {
 473         struct ath_common *common = ath9k_hw_common(priv->ah);
 474         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 475         int i = 0;
 476
 477         spin_lock_bh(&priv->beacon_lock);
 478         for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
 479                 if (priv->cur_beacon_conf.bslot[i] == NULL) {
 480                         avp->bslot = i;
 481                         break;
 482                 }
 483         }
 484
 485         priv->cur_beacon_conf.bslot[avp->bslot] = vif;
 486         spin_unlock_bh(&priv->beacon_lock);
 487
 488         ath_dbg(common, ATH_DBG_CONFIG,
 489                 "Added interface at beacon slot: %d\n", avp->bslot);
 490 }
 491
 492 void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
 493                             struct ieee80211_vif *vif)
 494 {
 495         struct ath_common *common = ath9k_hw_common(priv->ah);
 496         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 497
 498         spin_lock_bh(&priv->beacon_lock);
 499         priv->cur_beacon_conf.bslot[avp->bslot] = NULL;
 500         spin_unlock_bh(&priv->beacon_lock);
 501
 502         ath_dbg(common, ATH_DBG_CONFIG,
 503                 "Removed interface at beacon slot: %d\n", avp->bslot);
 504 }
 505
 506 /*
 507  * Calculate the TSF adjustment value for all slots
 508  * other than zero.
 509  */
 510 void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
 511                              struct ieee80211_vif *vif)
 512 {
 513         struct ath_common *common = ath9k_hw_common(priv->ah);
 514         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 515         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 516         u64 tsfadjust;
 517
 518         if (avp->bslot == 0)
 519                 return;
 520
 521         /*
 522          * The beacon interval cannot be different for multi-AP mode,
 523          * and we reach here only for VIF slots greater than zero,
 524          * so beacon_interval is guaranteed to be set in cur_conf.
 525          */
 526         tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
 527         avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
 528
 529         ath_dbg(common, ATH_DBG_CONFIG,
 530                 "tsfadjust is: %llu for bslot: %d\n",
 531                 (unsigned long long)tsfadjust, avp->bslot);
 532 }
 533
 534 static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 535 {
 536         bool *beacon_configured = (bool *)data;
 537         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 538
 539         if (vif->type == NL80211_IFTYPE_STATION &&
 540             avp->beacon_configured)
 541                 *beacon_configured = true;
 542 }
 543
 544 static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
 545                                           struct ieee80211_vif *vif)
 546 {
 547         struct ath_common *common = ath9k_hw_common(priv->ah);
 548         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 549         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 550         bool beacon_configured;
 551
 552         /*
 553          * Changing the beacon interval when multiple AP interfaces
 554          * are configured will affect beacon transmission of all
 555          * of them.
 556          */
 557         if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
 558             (priv->num_ap_vif > 1) &&
 559             (vif->type == NL80211_IFTYPE_AP) &&
 560             (cur_conf->beacon_interval != bss_conf->beacon_int)) {
 561                 ath_dbg(common, ATH_DBG_CONFIG,
 562                         "Changing beacon interval of multiple AP interfaces !\n");
 563                 return false;
 564         }
 565
 566         /*
 567          * If the HW is operating in AP mode, any new station interfaces that
 568          * are added cannot change the beacon parameters.
 569          */
 570         if (priv->num_ap_vif &&
 571             (vif->type != NL80211_IFTYPE_AP)) {
 572                 ath_dbg(common, ATH_DBG_CONFIG,
 573                         "HW in AP mode, cannot set STA beacon parameters\n");
 574                 return false;
 575         }
 576
 577         /*
 578          * The beacon parameters are configured only for the first
 579          * station interface.
 580          */
 581         if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
 582             (priv->num_sta_vif > 1) &&
 583             (vif->type == NL80211_IFTYPE_STATION)) {
 584                 beacon_configured = false;
 585                 ieee80211_iterate_active_interfaces_atomic(priv->hw,
 586                                                            ath9k_htc_beacon_iter,
 587                                                            &beacon_configured);
 588
 589                 if (beacon_configured) {
 590                         ath_dbg(common, ATH_DBG_CONFIG,
 591                                 "Beacon already configured for a station interface\n");
 592                         return false;
 593                 }
 594         }
 595
 596         return true;
 597 }
 598
 599 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
 600                              struct ieee80211_vif *vif)
 601 {
 602         struct ath_common *common = ath9k_hw_common(priv->ah);
 603         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 604         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 605         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 606
 607         if (!ath9k_htc_check_beacon_config(priv, vif))
 608                 return;
 609
 610         cur_conf->beacon_interval = bss_conf->beacon_int;
 611         if (cur_conf->beacon_interval == 0)
 612                 cur_conf->beacon_interval = 100;
 613
 614         cur_conf->dtim_period = bss_conf->dtim_period;
 615         cur_conf->bmiss_timeout =
 616                 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
 617
 618         switch (vif->type) {
 619         case NL80211_IFTYPE_STATION:
 620                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 621                 avp->beacon_configured = true;
 622                 break;
 623         case NL80211_IFTYPE_ADHOC:
 624                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 625                 break;
 626         case NL80211_IFTYPE_AP:
 627                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 628                 break;
 629         default:
 630                 ath_dbg(common, ATH_DBG_CONFIG,
 631                         "Unsupported beaconing mode\n");
 632                 return;
 633         }
 634 }
 635
 636 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
 637 {
 638         struct ath_common *common = ath9k_hw_common(priv->ah);
 639         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 640
 641         switch (priv->ah->opmode) {
 642         case NL80211_IFTYPE_STATION:
 643                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 644                 break;
 645         case NL80211_IFTYPE_ADHOC:
 646                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 647                 break;
 648         case NL80211_IFTYPE_AP:
 649                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 650                 break;
 651         default:
 652                 ath_dbg(common, ATH_DBG_CONFIG,
 653                         "Unsupported beaconing mode\n");
 654                 return;
 655         }
 656 }