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                 }
 330         next:
 331                 skb = ieee80211_get_buffered_bc(priv->hw, vif);
 332         }
 333
 334         spin_unlock_bh(&priv->beacon_lock);
 335 }
 336
 337 static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
 338                                   int slot)
 339 {
 340         struct ath_common *common = ath9k_hw_common(priv->ah);
 341         struct ieee80211_vif *vif;
 342         struct ath9k_htc_vif *avp;
 343         struct tx_beacon_header beacon_hdr;
 344         struct ath9k_htc_tx_ctl *tx_ctl;
 345         struct ieee80211_tx_info *info;
 346         struct ieee80211_mgmt *mgmt;
 347         struct sk_buff *beacon;
 348         u8 *tx_fhdr;
 349         int ret;
 350
 351         memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
 352
 353         spin_lock_bh(&priv->beacon_lock);
 354
 355         vif = priv->cur_beacon_conf.bslot[slot];
 356         avp = (struct ath9k_htc_vif *)vif->drv_priv;
 357
 358         if (unlikely(priv->op_flags & OP_SCANNING)) {
 359                 spin_unlock_bh(&priv->beacon_lock);
 360                 return;
 361         }
 362
 363         /* Get a new beacon */
 364         beacon = ieee80211_beacon_get(priv->hw, vif);
 365         if (!beacon) {
 366                 spin_unlock_bh(&priv->beacon_lock);
 367                 return;
 368         }
 369
 370         /*
 371          * Update the TSF adjust value here, the HW will
 372          * add this value for every beacon.
 373          */
 374         mgmt = (struct ieee80211_mgmt *)beacon->data;
 375         mgmt->u.beacon.timestamp = avp->tsfadjust;
 376
 377         info = IEEE80211_SKB_CB(beacon);
 378         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 379                 struct ieee80211_hdr *hdr =
 380                         (struct ieee80211_hdr *) beacon->data;
 381                 avp->seq_no += 0x10;
 382                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 383                 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
 384         }
 385
 386         tx_ctl = HTC_SKB_CB(beacon);
 387         memset(tx_ctl, 0, sizeof(*tx_ctl));
 388
 389         tx_ctl->type = ATH9K_HTC_BEACON;
 390
 391         beacon_hdr.vif_index = avp->index;
 392         tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
 393         memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
 394
 395         ret = htc_send(priv->htc, beacon, priv->beacon_ep);
 396         if (ret != 0) {
 397                 if (ret == -ENOMEM) {
 398                         ath_dbg(common, ATH_DBG_BSTUCK,
 399                                 "Failed to send beacon, no free TX buffer\n");
 400                 }
 401                 dev_kfree_skb_any(beacon);
 402         }
 403
 404         spin_unlock_bh(&priv->beacon_lock);
 405 }
 406
 407 static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
 408                                   struct wmi_event_swba *swba)
 409 {
 410         struct ath_common *common = ath9k_hw_common(priv->ah);
 411         u64 tsf;
 412         u32 tsftu;
 413         u16 intval;
 414         int slot;
 415
 416         intval = priv->cur_beacon_conf.beacon_interval & ATH9K_BEACON_PERIOD;
 417
 418         tsf = be64_to_cpu(swba->tsf);
 419         tsftu = TSF_TO_TU(tsf >> 32, tsf);
 420         slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
 421         slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
 422
 423         ath_dbg(common, ATH_DBG_BEACON,
 424                 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
 425                 slot, tsf, tsftu, intval);
 426
 427         return slot;
 428 }
 429
 430 void ath9k_htc_swba(struct ath9k_htc_priv *priv,
 431                     struct wmi_event_swba *swba)
 432 {
 433         struct ath_common *common = ath9k_hw_common(priv->ah);
 434         int slot;
 435
 436         if (swba->beacon_pending != 0) {
 437                 priv->cur_beacon_conf.bmiss_cnt++;
 438                 if (priv->cur_beacon_conf.bmiss_cnt > BSTUCK_THRESHOLD) {
 439                         ath_dbg(common, ATH_DBG_BSTUCK,
 440                                 "Beacon stuck, HW reset\n");
 441                         ieee80211_queue_work(priv->hw,
 442                                              &priv->fatal_work);
 443                 }
 444                 return;
 445         }
 446
 447         if (priv->cur_beacon_conf.bmiss_cnt) {
 448                 ath_dbg(common, ATH_DBG_BSTUCK,
 449                         "Resuming beacon xmit after %u misses\n",
 450                         priv->cur_beacon_conf.bmiss_cnt);
 451                 priv->cur_beacon_conf.bmiss_cnt = 0;
 452         }
 453
 454         slot = ath9k_htc_choose_bslot(priv, swba);
 455         spin_lock_bh(&priv->beacon_lock);
 456         if (priv->cur_beacon_conf.bslot[slot] == NULL) {
 457                 spin_unlock_bh(&priv->beacon_lock);
 458                 return;
 459         }
 460         spin_unlock_bh(&priv->beacon_lock);
 461
 462         ath9k_htc_send_buffered(priv, slot);
 463         ath9k_htc_send_beacon(priv, slot);
 464 }
 465
 466 void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
 467                             struct ieee80211_vif *vif)
 468 {
 469         struct ath_common *common = ath9k_hw_common(priv->ah);
 470         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 471         int i = 0;
 472
 473         spin_lock_bh(&priv->beacon_lock);
 474         for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
 475                 if (priv->cur_beacon_conf.bslot[i] == NULL) {
 476                         avp->bslot = i;
 477                         break;
 478                 }
 479         }
 480
 481         priv->cur_beacon_conf.bslot[avp->bslot] = vif;
 482         spin_unlock_bh(&priv->beacon_lock);
 483
 484         ath_dbg(common, ATH_DBG_CONFIG,
 485                 "Added interface at beacon slot: %d\n", avp->bslot);
 486 }
 487
 488 void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
 489                             struct ieee80211_vif *vif)
 490 {
 491         struct ath_common *common = ath9k_hw_common(priv->ah);
 492         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 493
 494         spin_lock_bh(&priv->beacon_lock);
 495         priv->cur_beacon_conf.bslot[avp->bslot] = NULL;
 496         spin_unlock_bh(&priv->beacon_lock);
 497
 498         ath_dbg(common, ATH_DBG_CONFIG,
 499                 "Removed interface at beacon slot: %d\n", avp->bslot);
 500 }
 501
 502 /*
 503  * Calculate the TSF adjustment value for all slots
 504  * other than zero.
 505  */
 506 void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
 507                              struct ieee80211_vif *vif)
 508 {
 509         struct ath_common *common = ath9k_hw_common(priv->ah);
 510         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 511         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 512         u64 tsfadjust;
 513
 514         if (avp->bslot == 0)
 515                 return;
 516
 517         /*
 518          * The beacon interval cannot be different for multi-AP mode,
 519          * and we reach here only for VIF slots greater than zero,
 520          * so beacon_interval is guaranteed to be set in cur_conf.
 521          */
 522         tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
 523         avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
 524
 525         ath_dbg(common, ATH_DBG_CONFIG,
 526                 "tsfadjust is: %llu for bslot: %d\n",
 527                 (unsigned long long)tsfadjust, avp->bslot);
 528 }
 529
 530 static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 531 {
 532         bool *beacon_configured = (bool *)data;
 533         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 534
 535         if (vif->type == NL80211_IFTYPE_STATION &&
 536             avp->beacon_configured)
 537                 *beacon_configured = true;
 538 }
 539
 540 static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
 541                                           struct ieee80211_vif *vif)
 542 {
 543         struct ath_common *common = ath9k_hw_common(priv->ah);
 544         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 545         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 546         bool beacon_configured;
 547
 548         /*
 549          * Changing the beacon interval when multiple AP interfaces
 550          * are configured will affect beacon transmission of all
 551          * of them.
 552          */
 553         if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
 554             (priv->num_ap_vif > 1) &&
 555             (vif->type == NL80211_IFTYPE_AP) &&
 556             (cur_conf->beacon_interval != bss_conf->beacon_int)) {
 557                 ath_dbg(common, ATH_DBG_CONFIG,
 558                         "Changing beacon interval of multiple AP interfaces !\n");
 559                 return false;
 560         }
 561
 562         /*
 563          * If the HW is operating in AP mode, any new station interfaces that
 564          * are added cannot change the beacon parameters.
 565          */
 566         if (priv->num_ap_vif &&
 567             (vif->type != NL80211_IFTYPE_AP)) {
 568                 ath_dbg(common, ATH_DBG_CONFIG,
 569                         "HW in AP mode, cannot set STA beacon parameters\n");
 570                 return false;
 571         }
 572
 573         /*
 574          * The beacon parameters are configured only for the first
 575          * station interface.
 576          */
 577         if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
 578             (priv->num_sta_vif > 1) &&
 579             (vif->type == NL80211_IFTYPE_STATION)) {
 580                 beacon_configured = false;
 581                 ieee80211_iterate_active_interfaces_atomic(priv->hw,
 582                                                            ath9k_htc_beacon_iter,
 583                                                            &beacon_configured);
 584
 585                 if (beacon_configured) {
 586                         ath_dbg(common, ATH_DBG_CONFIG,
 587                                 "Beacon already configured for a station interface\n");
 588                         return false;
 589                 }
 590         }
 591
 592         return true;
 593 }
 594
 595 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
 596                              struct ieee80211_vif *vif)
 597 {
 598         struct ath_common *common = ath9k_hw_common(priv->ah);
 599         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 600         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 601         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 602
 603         if (!ath9k_htc_check_beacon_config(priv, vif))
 604                 return;
 605
 606         cur_conf->beacon_interval = bss_conf->beacon_int;
 607         if (cur_conf->beacon_interval == 0)
 608                 cur_conf->beacon_interval = 100;
 609
 610         cur_conf->dtim_period = bss_conf->dtim_period;
 611         cur_conf->bmiss_timeout =
 612                 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
 613
 614         switch (vif->type) {
 615         case NL80211_IFTYPE_STATION:
 616                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 617                 avp->beacon_configured = true;
 618                 break;
 619         case NL80211_IFTYPE_ADHOC:
 620                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 621                 break;
 622         case NL80211_IFTYPE_AP:
 623                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 624                 break;
 625         default:
 626                 ath_dbg(common, ATH_DBG_CONFIG,
 627                         "Unsupported beaconing mode\n");
 628                 return;
 629         }
 630 }
 631
 632 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
 633 {
 634         struct ath_common *common = ath9k_hw_common(priv->ah);
 635         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 636
 637         switch (priv->ah->opmode) {
 638         case NL80211_IFTYPE_STATION:
 639                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 640                 break;
 641         case NL80211_IFTYPE_ADHOC:
 642                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 643                 break;
 644         case NL80211_IFTYPE_AP:
 645                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 646                 break;
 647         default:
 648                 ath_dbg(common, ATH_DBG_CONFIG,
 649                         "Unsupported beaconing mode\n");
 650                 return;
 651         }
 652 }