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                 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[IEEE80211_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 __attribute__ ((unused));
  78         u8 cmd_rsp;
  79
  80         memset(&bs, 0, sizeof(bs));
  81
  82         intval = bss_conf->beacon_interval;
  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, CONFIG, "intval: %u tsf: %llu tsftu: %u\n",
 171                 intval, tsf, tsftu);
 172         ath_dbg(common, 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 __attribute__ ((unused));
 194         u8 cmd_rsp;
 195         u64 tsf;
 196
 197         intval = bss_conf->beacon_interval;
 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 (test_bit(OP_TSF_RESET, &priv->op_flags)) {
 211                 ath9k_hw_reset_tsf(priv->ah);
 212                 clear_bit(OP_TSF_RESET, &priv->op_flags);
 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 (test_bit(OP_ENABLE_BEACON, &priv->op_flags))
 225                 imask |= ATH9K_INT_SWBA;
 226
 227         ath_dbg(common, CONFIG,
 228                 "AP Beacon config, intval: %d, nexttbtt: %u, resp_time: %d imask: 0x%x\n",
 229                 bss_conf->beacon_interval, nexttbtt,
 230                 priv->ah->config.sw_beacon_response_time, imask);
 231
 232         ath9k_htc_beaconq_config(priv);
 233
 234         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 235         ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
 236         priv->cur_beacon_conf.bmiss_cnt = 0;
 237         htc_imask = cpu_to_be32(imask);
 238         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 239 }
 240
 241 static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
 242                                           struct htc_beacon_config *bss_conf)
 243 {
 244         struct ath_common *common = ath9k_hw_common(priv->ah);
 245         enum ath9k_int imask = 0;
 246         u32 nexttbtt, intval, tsftu;
 247         __be32 htc_imask = 0;
 248         int ret __attribute__ ((unused));
 249         u8 cmd_rsp;
 250         u64 tsf;
 251
 252         intval = bss_conf->beacon_interval;
 253         nexttbtt = intval;
 254
 255         /*
 256          * Pull nexttbtt forward to reflect the current TSF.
 257          */
 258         tsf = ath9k_hw_gettsf64(priv->ah);
 259         tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
 260         do {
 261                 nexttbtt += intval;
 262         } while (nexttbtt < tsftu);
 263
 264         /*
 265          * Only one IBSS interfce is allowed.
 266          */
 267         if (intval > DEFAULT_SWBA_RESPONSE)
 268                 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
 269         else
 270                 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
 271
 272         if (test_bit(OP_ENABLE_BEACON, &priv->op_flags))
 273                 imask |= ATH9K_INT_SWBA;
 274
 275         ath_dbg(common, CONFIG,
 276                 "IBSS Beacon config, intval: %d, nexttbtt: %u, resp_time: %d, imask: 0x%x\n",
 277                 bss_conf->beacon_interval, nexttbtt,
 278                 priv->ah->config.sw_beacon_response_time, imask);
 279
 280         WMI_CMD(WMI_DISABLE_INTR_CMDID);
 281         ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
 282         priv->cur_beacon_conf.bmiss_cnt = 0;
 283         htc_imask = cpu_to_be32(imask);
 284         WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
 285 }
 286
 287 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
 288                         enum htc_endpoint_id ep_id, bool txok)
 289 {
 290         dev_kfree_skb_any(skb);
 291 }
 292
 293 static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv,
 294                                     int slot)
 295 {
 296         struct ath_common *common = ath9k_hw_common(priv->ah);
 297         struct ieee80211_vif *vif;
 298         struct sk_buff *skb;
 299         struct ieee80211_hdr *hdr;
 300         int padpos, padsize, ret, tx_slot;
 301
 302         spin_lock_bh(&priv->beacon_lock);
 303
 304         vif = priv->cur_beacon_conf.bslot[slot];
 305
 306         skb = ieee80211_get_buffered_bc(priv->hw, vif);
 307
 308         while(skb) {
 309                 hdr = (struct ieee80211_hdr *) skb->data;
 310
 311                 padpos = ath9k_cmn_padpos(hdr->frame_control);
 312                 padsize = padpos & 3;
 313                 if (padsize && skb->len > padpos) {
 314                         if (skb_headroom(skb) < padsize) {
 315                                 dev_kfree_skb_any(skb);
 316                                 goto next;
 317                         }
 318                         skb_push(skb, padsize);
 319                         memmove(skb->data, skb->data + padsize, padpos);
 320                 }
 321
 322                 tx_slot = ath9k_htc_tx_get_slot(priv);
 323                 if (tx_slot < 0) {
 324                         ath_dbg(common, XMIT, "No free CAB slot\n");
 325                         dev_kfree_skb_any(skb);
 326                         goto next;
 327                 }
 328
 329                 ret = ath9k_htc_tx_start(priv, NULL, skb, tx_slot, true);
 330                 if (ret != 0) {
 331                         ath9k_htc_tx_clear_slot(priv, tx_slot);
 332                         dev_kfree_skb_any(skb);
 333
 334                         ath_dbg(common, XMIT, "Failed to send CAB frame\n");
 335                 } else {
 336                         spin_lock_bh(&priv->tx.tx_lock);
 337                         priv->tx.queued_cnt++;
 338                         spin_unlock_bh(&priv->tx.tx_lock);
 339                 }
 340         next:
 341                 skb = ieee80211_get_buffered_bc(priv->hw, vif);
 342         }
 343
 344         spin_unlock_bh(&priv->beacon_lock);
 345 }
 346
 347 static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
 348                                   int slot)
 349 {
 350         struct ath_common *common = ath9k_hw_common(priv->ah);
 351         struct ieee80211_vif *vif;
 352         struct ath9k_htc_vif *avp;
 353         struct tx_beacon_header beacon_hdr;
 354         struct ath9k_htc_tx_ctl *tx_ctl;
 355         struct ieee80211_tx_info *info;
 356         struct ieee80211_mgmt *mgmt;
 357         struct sk_buff *beacon;
 358         u8 *tx_fhdr;
 359         int ret;
 360
 361         memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
 362
 363         spin_lock_bh(&priv->beacon_lock);
 364
 365         vif = priv->cur_beacon_conf.bslot[slot];
 366         avp = (struct ath9k_htc_vif *)vif->drv_priv;
 367
 368         if (unlikely(test_bit(OP_SCANNING, &priv->op_flags))) {
 369                 spin_unlock_bh(&priv->beacon_lock);
 370                 return;
 371         }
 372
 373         /* Get a new beacon */
 374         beacon = ieee80211_beacon_get(priv->hw, vif);
 375         if (!beacon) {
 376                 spin_unlock_bh(&priv->beacon_lock);
 377                 return;
 378         }
 379
 380         /*
 381          * Update the TSF adjust value here, the HW will
 382          * add this value for every beacon.
 383          */
 384         mgmt = (struct ieee80211_mgmt *)beacon->data;
 385         mgmt->u.beacon.timestamp = avp->tsfadjust;
 386
 387         info = IEEE80211_SKB_CB(beacon);
 388         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 389                 struct ieee80211_hdr *hdr =
 390                         (struct ieee80211_hdr *) beacon->data;
 391                 avp->seq_no += 0x10;
 392                 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 393                 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
 394         }
 395
 396         tx_ctl = HTC_SKB_CB(beacon);
 397         memset(tx_ctl, 0, sizeof(*tx_ctl));
 398
 399         tx_ctl->type = ATH9K_HTC_BEACON;
 400         tx_ctl->epid = priv->beacon_ep;
 401
 402         beacon_hdr.vif_index = avp->index;
 403         tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
 404         memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
 405
 406         ret = htc_send(priv->htc, beacon);
 407         if (ret != 0) {
 408                 if (ret == -ENOMEM) {
 409                         ath_dbg(common, BSTUCK,
 410                                 "Failed to send beacon, no free TX buffer\n");
 411                 }
 412                 dev_kfree_skb_any(beacon);
 413         }
 414
 415         spin_unlock_bh(&priv->beacon_lock);
 416 }
 417
 418 static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
 419                                   struct wmi_event_swba *swba)
 420 {
 421         struct ath_common *common = ath9k_hw_common(priv->ah);
 422         u64 tsf;
 423         u32 tsftu;
 424         u16 intval;
 425         int slot;
 426
 427         intval = priv->cur_beacon_conf.beacon_interval;
 428
 429         tsf = be64_to_cpu(swba->tsf);
 430         tsftu = TSF_TO_TU(tsf >> 32, tsf);
 431         slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
 432         slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
 433
 434         ath_dbg(common, BEACON,
 435                 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
 436                 slot, tsf, tsftu, intval);
 437
 438         return slot;
 439 }
 440
 441 void ath9k_htc_swba(struct ath9k_htc_priv *priv,
 442                     struct wmi_event_swba *swba)
 443 {
 444         struct ath_common *common = ath9k_hw_common(priv->ah);
 445         int slot;
 446
 447         if (swba->beacon_pending != 0) {
 448                 priv->cur_beacon_conf.bmiss_cnt++;
 449                 if (priv->cur_beacon_conf.bmiss_cnt > BSTUCK_THRESHOLD) {
 450                         ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n");
 451                         ieee80211_queue_work(priv->hw,
 452                                              &priv->fatal_work);
 453                 }
 454                 return;
 455         }
 456
 457         if (priv->cur_beacon_conf.bmiss_cnt) {
 458                 ath_dbg(common, BSTUCK,
 459                         "Resuming beacon xmit after %u misses\n",
 460                         priv->cur_beacon_conf.bmiss_cnt);
 461                 priv->cur_beacon_conf.bmiss_cnt = 0;
 462         }
 463
 464         slot = ath9k_htc_choose_bslot(priv, swba);
 465         spin_lock_bh(&priv->beacon_lock);
 466         if (priv->cur_beacon_conf.bslot[slot] == NULL) {
 467                 spin_unlock_bh(&priv->beacon_lock);
 468                 return;
 469         }
 470         spin_unlock_bh(&priv->beacon_lock);
 471
 472         ath9k_htc_send_buffered(priv, slot);
 473         ath9k_htc_send_beacon(priv, slot);
 474 }
 475
 476 void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
 477                             struct ieee80211_vif *vif)
 478 {
 479         struct ath_common *common = ath9k_hw_common(priv->ah);
 480         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 481         int i = 0;
 482
 483         spin_lock_bh(&priv->beacon_lock);
 484         for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
 485                 if (priv->cur_beacon_conf.bslot[i] == NULL) {
 486                         avp->bslot = i;
 487                         break;
 488                 }
 489         }
 490
 491         priv->cur_beacon_conf.bslot[avp->bslot] = vif;
 492         spin_unlock_bh(&priv->beacon_lock);
 493
 494         ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
 495                 avp->bslot);
 496 }
 497
 498 void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
 499                             struct ieee80211_vif *vif)
 500 {
 501         struct ath_common *common = ath9k_hw_common(priv->ah);
 502         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 503
 504         spin_lock_bh(&priv->beacon_lock);
 505         priv->cur_beacon_conf.bslot[avp->bslot] = NULL;
 506         spin_unlock_bh(&priv->beacon_lock);
 507
 508         ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n",
 509                 avp->bslot);
 510 }
 511
 512 /*
 513  * Calculate the TSF adjustment value for all slots
 514  * other than zero.
 515  */
 516 void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
 517                              struct ieee80211_vif *vif)
 518 {
 519         struct ath_common *common = ath9k_hw_common(priv->ah);
 520         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
 521         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 522         u64 tsfadjust;
 523
 524         if (avp->bslot == 0)
 525                 return;
 526
 527         /*
 528          * The beacon interval cannot be different for multi-AP mode,
 529          * and we reach here only for VIF slots greater than zero,
 530          * so beacon_interval is guaranteed to be set in cur_conf.
 531          */
 532         tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
 533         avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
 534
 535         ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
 536                 (unsigned long long)tsfadjust, avp->bslot);
 537 }
 538
 539 static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
 540 {
 541         bool *beacon_configured = (bool *)data;
 542         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 543
 544         if (vif->type == NL80211_IFTYPE_STATION &&
 545             avp->beacon_configured)
 546                 *beacon_configured = true;
 547 }
 548
 549 static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
 550                                           struct ieee80211_vif *vif)
 551 {
 552         struct ath_common *common = ath9k_hw_common(priv->ah);
 553         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 554         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 555         bool beacon_configured;
 556
 557         /*
 558          * Changing the beacon interval when multiple AP interfaces
 559          * are configured will affect beacon transmission of all
 560          * of them.
 561          */
 562         if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
 563             (priv->num_ap_vif > 1) &&
 564             (vif->type == NL80211_IFTYPE_AP) &&
 565             (cur_conf->beacon_interval != bss_conf->beacon_int)) {
 566                 ath_dbg(common, CONFIG,
 567                         "Changing beacon interval of multiple AP interfaces !\n");
 568                 return false;
 569         }
 570
 571         /*
 572          * If the HW is operating in AP mode, any new station interfaces that
 573          * are added cannot change the beacon parameters.
 574          */
 575         if (priv->num_ap_vif &&
 576             (vif->type != NL80211_IFTYPE_AP)) {
 577                 ath_dbg(common, CONFIG,
 578                         "HW in AP mode, cannot set STA beacon parameters\n");
 579                 return false;
 580         }
 581
 582         /*
 583          * The beacon parameters are configured only for the first
 584          * station interface.
 585          */
 586         if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
 587             (priv->num_sta_vif > 1) &&
 588             (vif->type == NL80211_IFTYPE_STATION)) {
 589                 beacon_configured = false;
 590                 ieee80211_iterate_active_interfaces_atomic(
 591                         priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 592                         ath9k_htc_beacon_iter, &beacon_configured);
 593
 594                 if (beacon_configured) {
 595                         ath_dbg(common, CONFIG,
 596                                 "Beacon already configured for a station interface\n");
 597                         return false;
 598                 }
 599         }
 600
 601         return true;
 602 }
 603
 604 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
 605                              struct ieee80211_vif *vif)
 606 {
 607         struct ath_common *common = ath9k_hw_common(priv->ah);
 608         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 609         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
 610         struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
 611
 612         if (!ath9k_htc_check_beacon_config(priv, vif))
 613                 return;
 614
 615         cur_conf->beacon_interval = bss_conf->beacon_int;
 616         if (cur_conf->beacon_interval == 0)
 617                 cur_conf->beacon_interval = 100;
 618
 619         cur_conf->dtim_period = bss_conf->dtim_period;
 620         cur_conf->bmiss_timeout =
 621                 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
 622
 623         switch (vif->type) {
 624         case NL80211_IFTYPE_STATION:
 625                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 626                 avp->beacon_configured = true;
 627                 break;
 628         case NL80211_IFTYPE_ADHOC:
 629                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 630                 break;
 631         case NL80211_IFTYPE_AP:
 632                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 633                 break;
 634         default:
 635                 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
 636                 return;
 637         }
 638 }
 639
 640 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
 641 {
 642         struct ath_common *common = ath9k_hw_common(priv->ah);
 643         struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
 644
 645         switch (priv->ah->opmode) {
 646         case NL80211_IFTYPE_STATION:
 647                 ath9k_htc_beacon_config_sta(priv, cur_conf);
 648                 break;
 649         case NL80211_IFTYPE_ADHOC:
 650                 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
 651                 break;
 652         case NL80211_IFTYPE_AP:
 653                 ath9k_htc_beacon_config_ap(priv, cur_conf);
 654                 break;
 655         default:
 656                 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
 657                 return;
 658         }
 659 }