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