2 * Copyright (c) 2008-2009 Atheros Communications Inc.
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.
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.
22 * This function will modify certain transmit queue properties depending on
23 * the operating mode of the station (AP or AdHoc). Parameters are AIFS
24 * settings and channel width min/max
26 int ath_beaconq_config(struct ath_softc *sc)
28 struct ath_hw *ah = sc->sc_ah;
29 struct ath_common *common = ath9k_hw_common(ah);
30 struct ath9k_tx_queue_info qi, qi_be;
33 ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
34 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
35 /* Always burst out beacon and CAB traffic. */
40 /* Adhoc mode; important thing is to use 2x cwmin. */
41 qnum = ath_tx_get_qnum(sc, ATH9K_TX_QUEUE_DATA,
43 ath9k_hw_get_txq_props(ah, qnum, &qi_be);
44 qi.tqi_aifs = qi_be.tqi_aifs;
45 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
46 qi.tqi_cwmax = qi_be.tqi_cwmax;
49 if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
50 ath_print(common, ATH_DBG_FATAL,
51 "Unable to update h/w beacon queue parameters\n");
54 ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
60 * Associates the beacon frame buffer with a transmit descriptor. Will set
61 * up all required antenna switch parameters, rate codes, and channel flags.
62 * Beacons are always sent out at the lowest rate, and are not retried.
64 static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
65 struct ath_buf *bf, int rateidx)
67 struct sk_buff *skb = bf->bf_mpdu;
68 struct ath_hw *ah = sc->sc_ah;
69 struct ath_common *common = ath9k_hw_common(ah);
71 struct ath9k_11n_rate_series series[4];
72 int flags, antenna, ctsrate = 0, ctsduration = 0;
73 struct ieee80211_supported_band *sband;
77 flags = ATH9K_TXDESC_NOACK;
81 * Switch antenna every beacon.
82 * Should only switch every beacon period, not for every SWBA
83 * XXX assumes two antennae
85 antenna = ((sc->beacon.ast_be_xmit / sc->nbcnvifs) & 1 ? 2 : 1);
87 sband = &sc->sbands[common->hw->conf.channel->band];
88 rate = sband->bitrates[rateidx].hw_value;
89 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
90 rate |= sband->bitrates[rateidx].hw_value_short;
92 ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
93 ATH9K_PKT_TYPE_BEACON,
95 ATH9K_TXKEYIX_INVALID,
99 /* NB: beacon's BufLen must be a multiple of 4 bytes */
100 ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
101 true, true, ds, bf->bf_buf_addr,
104 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
106 series[0].Rate = rate;
107 series[0].ChSel = common->tx_chainmask;
108 series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
109 ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
113 static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
114 struct ieee80211_vif *vif)
116 struct ath_wiphy *aphy = hw->priv;
117 struct ath_softc *sc = aphy->sc;
118 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
122 struct ath_txq *cabq;
123 struct ieee80211_tx_info *info;
126 if (aphy->state != ATH_WIPHY_ACTIVE)
129 avp = (void *)vif->drv_priv;
130 cabq = sc->beacon.cabq;
132 if (avp->av_bcbuf == NULL)
135 /* Release the old beacon first */
140 dma_unmap_single(sc->dev, bf->bf_dmacontext,
141 skb->len, DMA_TO_DEVICE);
142 dev_kfree_skb_any(skb);
145 /* Get a new beacon from mac80211 */
147 skb = ieee80211_beacon_get(hw, vif);
151 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
154 info = IEEE80211_SKB_CB(skb);
155 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
157 * TODO: make sure the seq# gets assigned properly (vs. other
160 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
161 sc->tx.seq_no += 0x10;
162 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
163 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
166 bf->bf_buf_addr = bf->bf_dmacontext =
167 dma_map_single(sc->dev, skb->data,
168 skb->len, DMA_TO_DEVICE);
169 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
170 dev_kfree_skb_any(skb);
172 ath_print(common, ATH_DBG_FATAL,
173 "dma_mapping_error on beaconing\n");
177 skb = ieee80211_get_buffered_bc(hw, vif);
180 * if the CABQ traffic from previous DTIM is pending and the current
181 * beacon is also a DTIM.
182 * 1) if there is only one vif let the cab traffic continue.
183 * 2) if there are more than one vif and we are using staggered
184 * beacons, then drain the cabq by dropping all the frames in
185 * the cabq so that the current vifs cab traffic can be scheduled.
187 spin_lock_bh(&cabq->axq_lock);
188 cabq_depth = cabq->axq_depth;
189 spin_unlock_bh(&cabq->axq_lock);
191 if (skb && cabq_depth) {
193 ath_print(common, ATH_DBG_BEACON,
194 "Flushing previous cabq traffic\n");
195 ath_draintxq(sc, cabq, false);
199 ath_beacon_setup(sc, avp, bf, info->control.rates[0].idx);
202 ath_tx_cabq(hw, skb);
203 skb = ieee80211_get_buffered_bc(hw, vif);
209 int ath_beacon_alloc(struct ath_wiphy *aphy, struct ieee80211_vif *vif)
211 struct ath_softc *sc = aphy->sc;
212 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
218 avp = (void *)vif->drv_priv;
220 /* Allocate a beacon descriptor if we haven't done so. */
221 if (!avp->av_bcbuf) {
222 /* Allocate beacon state for hostap/ibss. We know
223 * a buffer is available. */
224 avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf,
225 struct ath_buf, list);
226 list_del(&avp->av_bcbuf->list);
228 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP ||
229 sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC ||
230 sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) {
233 * Assign the vif to a beacon xmit slot. As
234 * above, this cannot fail to find one.
237 for (slot = 0; slot < ATH_BCBUF; slot++)
238 if (sc->beacon.bslot[slot] == NULL) {
239 avp->av_bslot = slot;
241 /* NB: keep looking for a double slot */
242 if (slot == 0 || !sc->beacon.bslot[slot-1])
245 BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL);
246 sc->beacon.bslot[avp->av_bslot] = vif;
247 sc->beacon.bslot_aphy[avp->av_bslot] = aphy;
252 /* release the previous beacon frame, if it already exists. */
254 if (bf->bf_mpdu != NULL) {
256 dma_unmap_single(sc->dev, bf->bf_dmacontext,
257 skb->len, DMA_TO_DEVICE);
258 dev_kfree_skb_any(skb);
262 /* NB: the beacon data buffer must be 32-bit aligned. */
263 skb = ieee80211_beacon_get(sc->hw, vif);
265 ath_print(common, ATH_DBG_BEACON, "cannot get skb\n");
269 tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
270 sc->beacon.bc_tstamp = le64_to_cpu(tstamp);
271 /* Calculate a TSF adjustment factor required for staggered beacons. */
272 if (avp->av_bslot > 0) {
276 intval = sc->beacon_interval ? : ATH_DEFAULT_BINTVAL;
279 * Calculate the TSF offset for this beacon slot, i.e., the
280 * number of usecs that need to be added to the timestamp field
281 * in Beacon and Probe Response frames. Beacon slot 0 is
282 * processed at the correct offset, so it does not require TSF
283 * adjustment. Other slots are adjusted to get the timestamp
284 * close to the TBTT for the BSS.
286 tsfadjust = intval * avp->av_bslot / ATH_BCBUF;
287 avp->tsf_adjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
289 ath_print(common, ATH_DBG_BEACON,
290 "stagger beacons, bslot %d intval "
291 "%u tsfadjust %llu\n",
292 avp->av_bslot, intval, (unsigned long long)tsfadjust);
294 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
297 avp->tsf_adjust = cpu_to_le64(0);
300 bf->bf_buf_addr = bf->bf_dmacontext =
301 dma_map_single(sc->dev, skb->data,
302 skb->len, DMA_TO_DEVICE);
303 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
304 dev_kfree_skb_any(skb);
306 ath_print(common, ATH_DBG_FATAL,
307 "dma_mapping_error on beacon alloc\n");
314 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
316 if (avp->av_bcbuf != NULL) {
319 if (avp->av_bslot != -1) {
320 sc->beacon.bslot[avp->av_bslot] = NULL;
321 sc->beacon.bslot_aphy[avp->av_bslot] = NULL;
326 if (bf->bf_mpdu != NULL) {
327 struct sk_buff *skb = bf->bf_mpdu;
328 dma_unmap_single(sc->dev, bf->bf_dmacontext,
329 skb->len, DMA_TO_DEVICE);
330 dev_kfree_skb_any(skb);
333 list_add_tail(&bf->list, &sc->beacon.bbuf);
335 avp->av_bcbuf = NULL;
339 void ath_beacon_tasklet(unsigned long data)
341 struct ath_softc *sc = (struct ath_softc *)data;
342 struct ath_hw *ah = sc->sc_ah;
343 struct ath_common *common = ath9k_hw_common(ah);
344 struct ath_buf *bf = NULL;
345 struct ieee80211_vif *vif;
346 struct ath_wiphy *aphy;
348 u32 bfaddr, bc = 0, tsftu;
353 * Check if the previous beacon has gone out. If
354 * not don't try to post another, skip this period
355 * and wait for the next. Missed beacons indicate
356 * a problem and should not occur. If we miss too
357 * many consecutive beacons reset the device.
359 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
360 sc->beacon.bmisscnt++;
362 if (sc->beacon.bmisscnt < BSTUCK_THRESH) {
363 ath_print(common, ATH_DBG_BEACON,
364 "missed %u consecutive beacons\n",
365 sc->beacon.bmisscnt);
366 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
367 ath_print(common, ATH_DBG_BEACON,
368 "beacon is officially stuck\n");
369 sc->sc_flags |= SC_OP_TSF_RESET;
370 ath_reset(sc, false);
376 if (sc->beacon.bmisscnt != 0) {
377 ath_print(common, ATH_DBG_BEACON,
378 "resume beacon xmit after %u misses\n",
379 sc->beacon.bmisscnt);
380 sc->beacon.bmisscnt = 0;
384 * Generate beacon frames. we are sending frames
385 * staggered so calculate the slot for this frame based
386 * on the tsf to safeguard against missing an swba.
389 intval = sc->beacon_interval ? : ATH_DEFAULT_BINTVAL;
391 tsf = ath9k_hw_gettsf64(ah);
392 tsftu = TSF_TO_TU(tsf>>32, tsf);
393 slot = ((tsftu % intval) * ATH_BCBUF) / intval;
395 * Reverse the slot order to get slot 0 on the TBTT offset that does
396 * not require TSF adjustment and other slots adding
397 * slot/ATH_BCBUF * beacon_int to timestamp. For example, with
398 * ATH_BCBUF = 4, we process beacon slots as follows: 3 2 1 0 3 2 1 ..
399 * and slot 0 is at correct offset to TBTT.
401 slot = ATH_BCBUF - slot - 1;
402 vif = sc->beacon.bslot[slot];
403 aphy = sc->beacon.bslot_aphy[slot];
405 ath_print(common, ATH_DBG_BEACON,
406 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
407 slot, tsf, tsftu, intval, vif);
411 bf = ath_beacon_generate(aphy->hw, vif);
413 bfaddr = bf->bf_daddr;
419 * Handle slot time change when a non-ERP station joins/leaves
420 * an 11g network. The 802.11 layer notifies us via callback,
421 * we mark updateslot, then wait one beacon before effecting
422 * the change. This gives associated stations at least one
423 * beacon interval to note the state change.
425 * NB: The slot time change state machine is clocked according
426 * to whether we are bursting or staggering beacons. We
427 * recognize the request to update and record the current
428 * slot then don't transition until that slot is reached
429 * again. If we miss a beacon for that slot then we'll be
430 * slow to transition but we'll be sure at least one beacon
431 * interval has passed. When bursting slot is always left
432 * set to ATH_BCBUF so this check is a noop.
434 if (sc->beacon.updateslot == UPDATE) {
435 sc->beacon.updateslot = COMMIT; /* commit next beacon */
436 sc->beacon.slotupdate = slot;
437 } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
438 ah->slottime = sc->beacon.slottime;
439 ath9k_hw_init_global_settings(ah);
440 sc->beacon.updateslot = OK;
444 * Stop any current dma and put the new frame(s) on the queue.
445 * This should never fail since we check above that no frames
446 * are still pending on the queue.
448 if (!ath9k_hw_stoptxdma(ah, sc->beacon.beaconq)) {
449 ath_print(common, ATH_DBG_FATAL,
450 "beacon queue %u did not stop?\n", sc->beacon.beaconq);
453 /* NB: cabq traffic should already be queued and primed */
454 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
455 ath9k_hw_txstart(ah, sc->beacon.beaconq);
457 sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */
461 static void ath9k_beacon_init(struct ath_softc *sc,
465 if (beacon_period & ATH9K_BEACON_RESET_TSF)
468 ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period);
470 if (beacon_period & ATH9K_BEACON_RESET_TSF)
471 ath9k_ps_restore(sc);
475 * For multi-bss ap support beacons are either staggered evenly over N slots or
476 * burst together. For the former arrange for the SWBA to be delivered for each
477 * slot. Slots that are not occupied will generate nothing.
479 static void ath_beacon_config_ap(struct ath_softc *sc,
480 struct ath_beacon_config *conf)
482 struct ath_hw *ah = sc->sc_ah;
483 u32 nexttbtt, intval;
485 /* NB: the beacon interval is kept internally in TU's */
486 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
487 intval /= ATH_BCBUF; /* for staggered beacons */
490 if (sc->sc_flags & SC_OP_TSF_RESET)
491 intval |= ATH9K_BEACON_RESET_TSF;
494 * In AP mode we enable the beacon timers and SWBA interrupts to
495 * prepare beacon frames.
497 intval |= ATH9K_BEACON_ENA;
498 ah->imask |= ATH9K_INT_SWBA;
499 ath_beaconq_config(sc);
501 /* Set the computed AP beacon timers */
503 ath9k_hw_set_interrupts(ah, 0);
504 ath9k_beacon_init(sc, nexttbtt, intval);
505 sc->beacon.bmisscnt = 0;
506 ath9k_hw_set_interrupts(ah, ah->imask);
508 /* Clear the reset TSF flag, so that subsequent beacon updation
509 will not reset the HW TSF. */
511 sc->sc_flags &= ~SC_OP_TSF_RESET;
515 * This sets up the beacon timers according to the timestamp of the last
516 * received beacon and the current TSF, configures PCF and DTIM
517 * handling, programs the sleep registers so the hardware will wakeup in
518 * time to receive beacons, and configures the beacon miss handling so
519 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
520 * we've associated with.
522 static void ath_beacon_config_sta(struct ath_softc *sc,
523 struct ath_beacon_config *conf)
525 struct ath_hw *ah = sc->sc_ah;
526 struct ath_common *common = ath9k_hw_common(ah);
527 struct ath9k_beacon_state bs;
528 int dtimperiod, dtimcount, sleepduration;
529 int cfpperiod, cfpcount;
530 u32 nexttbtt = 0, intval, tsftu;
532 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
534 /* No need to configure beacon if we are not associated */
535 if (!common->curaid) {
536 ath_print(common, ATH_DBG_BEACON,
537 "STA is not yet associated..skipping beacon config\n");
541 memset(&bs, 0, sizeof(bs));
542 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
545 * Setup dtim and cfp parameters according to
546 * last beacon we received (which may be none).
548 dtimperiod = conf->dtim_period;
549 if (dtimperiod <= 0) /* NB: 0 if not known */
551 dtimcount = conf->dtim_count;
552 if (dtimcount >= dtimperiod) /* NB: sanity check */
554 cfpperiod = 1; /* NB: no PCF support yet */
557 sleepduration = conf->listen_interval * intval;
558 if (sleepduration <= 0)
559 sleepduration = intval;
562 * Pull nexttbtt forward to reflect the current
563 * TSF and calculate dtim+cfp state for the result.
565 tsf = ath9k_hw_gettsf64(ah);
566 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
568 num_beacons = tsftu / intval + 1;
569 offset = tsftu % intval;
570 nexttbtt = tsftu - offset;
574 /* DTIM Beacon every dtimperiod Beacon */
575 dtim_dec_count = num_beacons % dtimperiod;
576 /* CFP every cfpperiod DTIM Beacon */
577 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
581 dtimcount -= dtim_dec_count;
583 dtimcount += dtimperiod;
585 cfpcount -= cfp_dec_count;
587 cfpcount += cfpperiod;
589 bs.bs_intval = intval;
590 bs.bs_nexttbtt = nexttbtt;
591 bs.bs_dtimperiod = dtimperiod*intval;
592 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
593 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
594 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
595 bs.bs_cfpmaxduration = 0;
598 * Calculate the number of consecutive beacons to miss* before taking
599 * a BMISS interrupt. The configuration is specified in TU so we only
600 * need calculate based on the beacon interval. Note that we clamp the
601 * result to at most 15 beacons.
603 if (sleepduration > intval) {
604 bs.bs_bmissthreshold = conf->listen_interval *
605 ATH_DEFAULT_BMISS_LIMIT / 2;
607 bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval);
608 if (bs.bs_bmissthreshold > 15)
609 bs.bs_bmissthreshold = 15;
610 else if (bs.bs_bmissthreshold <= 0)
611 bs.bs_bmissthreshold = 1;
615 * Calculate sleep duration. The configuration is given in ms.
616 * We ensure a multiple of the beacon period is used. Also, if the sleep
617 * duration is greater than the DTIM period then it makes senses
618 * to make it a multiple of that.
623 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
624 if (bs.bs_sleepduration > bs.bs_dtimperiod)
625 bs.bs_sleepduration = bs.bs_dtimperiod;
627 /* TSF out of range threshold fixed at 1 second */
628 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
630 ath_print(common, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
631 ath_print(common, ATH_DBG_BEACON,
632 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
633 bs.bs_bmissthreshold, bs.bs_sleepduration,
634 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
636 /* Set the computed STA beacon timers */
638 ath9k_hw_set_interrupts(ah, 0);
639 ath9k_hw_set_sta_beacon_timers(ah, &bs);
640 ah->imask |= ATH9K_INT_BMISS;
641 ath9k_hw_set_interrupts(ah, ah->imask);
644 static void ath_beacon_config_adhoc(struct ath_softc *sc,
645 struct ath_beacon_config *conf,
646 struct ieee80211_vif *vif)
648 struct ath_hw *ah = sc->sc_ah;
649 struct ath_common *common = ath9k_hw_common(ah);
651 u32 tsftu, intval, nexttbtt;
653 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
656 /* Pull nexttbtt forward to reflect the current TSF */
658 nexttbtt = TSF_TO_TU(sc->beacon.bc_tstamp >> 32, sc->beacon.bc_tstamp);
662 nexttbtt = roundup(nexttbtt, intval);
664 tsf = ath9k_hw_gettsf64(ah);
665 tsftu = TSF_TO_TU((u32)(tsf>>32), (u32)tsf) + FUDGE;
668 } while (nexttbtt < tsftu);
670 ath_print(common, ATH_DBG_BEACON,
671 "IBSS nexttbtt %u intval %u (%u)\n",
672 nexttbtt, intval, conf->beacon_interval);
675 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
676 * if we need to manually prepare beacon frames. Otherwise we use a
677 * self-linked tx descriptor and let the hardware deal with things.
679 intval |= ATH9K_BEACON_ENA;
680 ah->imask |= ATH9K_INT_SWBA;
682 ath_beaconq_config(sc);
684 /* Set the computed ADHOC beacon timers */
686 ath9k_hw_set_interrupts(ah, 0);
687 ath9k_beacon_init(sc, nexttbtt, intval);
688 sc->beacon.bmisscnt = 0;
689 ath9k_hw_set_interrupts(ah, ah->imask);
692 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
694 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
695 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
696 enum nl80211_iftype iftype;
698 /* Setup the beacon configuration parameters */
700 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
704 cur_conf->beacon_interval = bss_conf->beacon_int;
705 cur_conf->dtim_period = bss_conf->dtim_period;
706 cur_conf->listen_interval = 1;
707 cur_conf->dtim_count = 1;
708 cur_conf->bmiss_timeout =
709 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
711 iftype = sc->sc_ah->opmode;
715 * It looks like mac80211 may end up using beacon interval of zero in
716 * some cases (at least for mesh point). Avoid getting into an
717 * infinite loop by using a bit safer value instead. To be safe,
718 * do sanity check on beacon interval for all operating modes.
720 if (cur_conf->beacon_interval == 0)
721 cur_conf->beacon_interval = 100;
724 case NL80211_IFTYPE_AP:
725 ath_beacon_config_ap(sc, cur_conf);
727 case NL80211_IFTYPE_ADHOC:
728 case NL80211_IFTYPE_MESH_POINT:
729 ath_beacon_config_adhoc(sc, cur_conf, vif);
731 case NL80211_IFTYPE_STATION:
732 ath_beacon_config_sta(sc, cur_conf);
735 ath_print(common, ATH_DBG_CONFIG,
736 "Unsupported beaconing mode\n");
740 sc->sc_flags |= SC_OP_BEACONS;