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 = sc->tx.hwq_map[WME_AC_BE];
42 ath9k_hw_get_txq_props(ah, qnum, &qi_be);
43 qi.tqi_aifs = qi_be.tqi_aifs;
44 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
45 qi.tqi_cwmax = qi_be.tqi_cwmax;
48 if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
49 ath_print(common, ATH_DBG_FATAL,
50 "Unable to update h/w beacon queue parameters\n");
53 ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
59 * Associates the beacon frame buffer with a transmit descriptor. Will set
60 * up all required antenna switch parameters, rate codes, and channel flags.
61 * Beacons are always sent out at the lowest rate, and are not retried.
63 static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
64 struct ath_buf *bf, int rateidx)
66 struct sk_buff *skb = bf->bf_mpdu;
67 struct ath_hw *ah = sc->sc_ah;
68 struct ath_common *common = ath9k_hw_common(ah);
70 struct ath9k_11n_rate_series series[4];
71 int flags, antenna, ctsrate = 0, ctsduration = 0;
72 struct ieee80211_supported_band *sband;
76 flags = ATH9K_TXDESC_NOACK;
80 * Switch antenna every beacon.
81 * Should only switch every beacon period, not for every SWBA
82 * XXX assumes two antennae
84 antenna = ((sc->beacon.ast_be_xmit / sc->nbcnvifs) & 1 ? 2 : 1);
86 sband = &sc->sbands[common->hw->conf.channel->band];
87 rate = sband->bitrates[rateidx].hw_value;
88 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
89 rate |= sband->bitrates[rateidx].hw_value_short;
91 ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
92 ATH9K_PKT_TYPE_BEACON,
94 ATH9K_TXKEYIX_INVALID,
98 /* NB: beacon's BufLen must be a multiple of 4 bytes */
99 ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
100 true, true, ds, bf->bf_buf_addr,
103 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
105 series[0].Rate = rate;
106 series[0].ChSel = common->tx_chainmask;
107 series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
108 ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
112 static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
113 struct ieee80211_vif *vif)
115 struct ath_wiphy *aphy = hw->priv;
116 struct ath_softc *sc = aphy->sc;
117 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
121 struct ath_txq *cabq;
122 struct ieee80211_tx_info *info;
125 if (aphy->state != ATH_WIPHY_ACTIVE)
128 avp = (void *)vif->drv_priv;
129 cabq = sc->beacon.cabq;
131 if (avp->av_bcbuf == NULL)
134 /* Release the old beacon first */
139 dma_unmap_single(sc->dev, bf->bf_buf_addr,
140 skb->len, DMA_TO_DEVICE);
141 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 = dma_map_single(sc->dev, skb->data,
167 skb->len, DMA_TO_DEVICE);
168 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
169 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_buf_addr,
257 skb->len, DMA_TO_DEVICE);
258 dev_kfree_skb_any(skb);
263 /* NB: the beacon data buffer must be 32-bit aligned. */
264 skb = ieee80211_beacon_get(sc->hw, vif);
266 ath_print(common, ATH_DBG_BEACON, "cannot get skb\n");
270 tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
271 sc->beacon.bc_tstamp = le64_to_cpu(tstamp);
272 /* Calculate a TSF adjustment factor required for staggered beacons. */
273 if (avp->av_bslot > 0) {
277 intval = sc->beacon_interval ? : ATH_DEFAULT_BINTVAL;
280 * Calculate the TSF offset for this beacon slot, i.e., the
281 * number of usecs that need to be added to the timestamp field
282 * in Beacon and Probe Response frames. Beacon slot 0 is
283 * processed at the correct offset, so it does not require TSF
284 * adjustment. Other slots are adjusted to get the timestamp
285 * close to the TBTT for the BSS.
287 tsfadjust = intval * avp->av_bslot / ATH_BCBUF;
288 avp->tsf_adjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
290 ath_print(common, ATH_DBG_BEACON,
291 "stagger beacons, bslot %d intval "
292 "%u tsfadjust %llu\n",
293 avp->av_bslot, intval, (unsigned long long)tsfadjust);
295 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
298 avp->tsf_adjust = cpu_to_le64(0);
301 bf->bf_buf_addr = 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);
307 ath_print(common, ATH_DBG_FATAL,
308 "dma_mapping_error on beacon alloc\n");
315 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
317 if (avp->av_bcbuf != NULL) {
320 if (avp->av_bslot != -1) {
321 sc->beacon.bslot[avp->av_bslot] = NULL;
322 sc->beacon.bslot_aphy[avp->av_bslot] = NULL;
327 if (bf->bf_mpdu != NULL) {
328 struct sk_buff *skb = bf->bf_mpdu;
329 dma_unmap_single(sc->dev, bf->bf_buf_addr,
330 skb->len, DMA_TO_DEVICE);
331 dev_kfree_skb_any(skb);
335 list_add_tail(&bf->list, &sc->beacon.bbuf);
337 avp->av_bcbuf = NULL;
341 void ath_beacon_tasklet(unsigned long data)
343 struct ath_softc *sc = (struct ath_softc *)data;
344 struct ath_hw *ah = sc->sc_ah;
345 struct ath_common *common = ath9k_hw_common(ah);
346 struct ath_buf *bf = NULL;
347 struct ieee80211_vif *vif;
348 struct ath_wiphy *aphy;
350 u32 bfaddr, bc = 0, tsftu;
355 * Check if the previous beacon has gone out. If
356 * not don't try to post another, skip this period
357 * and wait for the next. Missed beacons indicate
358 * a problem and should not occur. If we miss too
359 * many consecutive beacons reset the device.
361 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
362 sc->beacon.bmisscnt++;
364 if (sc->beacon.bmisscnt < BSTUCK_THRESH) {
365 ath_print(common, ATH_DBG_BSTUCK,
366 "missed %u consecutive beacons\n",
367 sc->beacon.bmisscnt);
368 ath9k_hw_bstuck_nfcal(ah);
369 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
370 ath_print(common, ATH_DBG_BSTUCK,
371 "beacon is officially stuck\n");
372 sc->sc_flags |= SC_OP_TSF_RESET;
379 if (sc->beacon.bmisscnt != 0) {
380 ath_print(common, ATH_DBG_BSTUCK,
381 "resume beacon xmit after %u misses\n",
382 sc->beacon.bmisscnt);
383 sc->beacon.bmisscnt = 0;
387 * Generate beacon frames. we are sending frames
388 * staggered so calculate the slot for this frame based
389 * on the tsf to safeguard against missing an swba.
392 intval = sc->beacon_interval ? : ATH_DEFAULT_BINTVAL;
394 tsf = ath9k_hw_gettsf64(ah);
395 tsftu = TSF_TO_TU(tsf>>32, tsf);
396 slot = ((tsftu % intval) * ATH_BCBUF) / intval;
398 * Reverse the slot order to get slot 0 on the TBTT offset that does
399 * not require TSF adjustment and other slots adding
400 * slot/ATH_BCBUF * beacon_int to timestamp. For example, with
401 * ATH_BCBUF = 4, we process beacon slots as follows: 3 2 1 0 3 2 1 ..
402 * and slot 0 is at correct offset to TBTT.
404 slot = ATH_BCBUF - slot - 1;
405 vif = sc->beacon.bslot[slot];
406 aphy = sc->beacon.bslot_aphy[slot];
408 ath_print(common, ATH_DBG_BEACON,
409 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
410 slot, tsf, tsftu, intval, vif);
414 bf = ath_beacon_generate(aphy->hw, vif);
416 bfaddr = bf->bf_daddr;
422 * Handle slot time change when a non-ERP station joins/leaves
423 * an 11g network. The 802.11 layer notifies us via callback,
424 * we mark updateslot, then wait one beacon before effecting
425 * the change. This gives associated stations at least one
426 * beacon interval to note the state change.
428 * NB: The slot time change state machine is clocked according
429 * to whether we are bursting or staggering beacons. We
430 * recognize the request to update and record the current
431 * slot then don't transition until that slot is reached
432 * again. If we miss a beacon for that slot then we'll be
433 * slow to transition but we'll be sure at least one beacon
434 * interval has passed. When bursting slot is always left
435 * set to ATH_BCBUF so this check is a noop.
437 if (sc->beacon.updateslot == UPDATE) {
438 sc->beacon.updateslot = COMMIT; /* commit next beacon */
439 sc->beacon.slotupdate = slot;
440 } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
441 ah->slottime = sc->beacon.slottime;
442 ath9k_hw_init_global_settings(ah);
443 sc->beacon.updateslot = OK;
447 * Stop any current dma and put the new frame(s) on the queue.
448 * This should never fail since we check above that no frames
449 * are still pending on the queue.
451 if (!ath9k_hw_stoptxdma(ah, sc->beacon.beaconq)) {
452 ath_print(common, ATH_DBG_FATAL,
453 "beacon queue %u did not stop?\n", sc->beacon.beaconq);
456 /* NB: cabq traffic should already be queued and primed */
457 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
458 ath9k_hw_txstart(ah, sc->beacon.beaconq);
460 sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */
464 static void ath9k_beacon_init(struct ath_softc *sc,
468 if (beacon_period & ATH9K_BEACON_RESET_TSF)
471 ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period);
473 if (beacon_period & ATH9K_BEACON_RESET_TSF)
474 ath9k_ps_restore(sc);
478 * For multi-bss ap support beacons are either staggered evenly over N slots or
479 * burst together. For the former arrange for the SWBA to be delivered for each
480 * slot. Slots that are not occupied will generate nothing.
482 static void ath_beacon_config_ap(struct ath_softc *sc,
483 struct ath_beacon_config *conf)
485 struct ath_hw *ah = sc->sc_ah;
486 u32 nexttbtt, intval;
488 /* NB: the beacon interval is kept internally in TU's */
489 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
490 intval /= ATH_BCBUF; /* for staggered beacons */
493 if (sc->sc_flags & SC_OP_TSF_RESET)
494 intval |= ATH9K_BEACON_RESET_TSF;
497 * In AP mode we enable the beacon timers and SWBA interrupts to
498 * prepare beacon frames.
500 intval |= ATH9K_BEACON_ENA;
501 ah->imask |= ATH9K_INT_SWBA;
502 ath_beaconq_config(sc);
504 /* Set the computed AP beacon timers */
506 ath9k_hw_set_interrupts(ah, 0);
507 ath9k_beacon_init(sc, nexttbtt, intval);
508 sc->beacon.bmisscnt = 0;
509 ath9k_hw_set_interrupts(ah, ah->imask);
511 /* Clear the reset TSF flag, so that subsequent beacon updation
512 will not reset the HW TSF. */
514 sc->sc_flags &= ~SC_OP_TSF_RESET;
518 * This sets up the beacon timers according to the timestamp of the last
519 * received beacon and the current TSF, configures PCF and DTIM
520 * handling, programs the sleep registers so the hardware will wakeup in
521 * time to receive beacons, and configures the beacon miss handling so
522 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
523 * we've associated with.
525 static void ath_beacon_config_sta(struct ath_softc *sc,
526 struct ath_beacon_config *conf)
528 struct ath_hw *ah = sc->sc_ah;
529 struct ath_common *common = ath9k_hw_common(ah);
530 struct ath9k_beacon_state bs;
531 int dtimperiod, dtimcount, sleepduration;
532 int cfpperiod, cfpcount;
533 u32 nexttbtt = 0, intval, tsftu;
535 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
537 /* No need to configure beacon if we are not associated */
538 if (!common->curaid) {
539 ath_print(common, ATH_DBG_BEACON,
540 "STA is not yet associated..skipping beacon config\n");
544 memset(&bs, 0, sizeof(bs));
545 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
548 * Setup dtim and cfp parameters according to
549 * last beacon we received (which may be none).
551 dtimperiod = conf->dtim_period;
552 if (dtimperiod <= 0) /* NB: 0 if not known */
554 dtimcount = conf->dtim_count;
555 if (dtimcount >= dtimperiod) /* NB: sanity check */
557 cfpperiod = 1; /* NB: no PCF support yet */
560 sleepduration = conf->listen_interval * intval;
561 if (sleepduration <= 0)
562 sleepduration = intval;
565 * Pull nexttbtt forward to reflect the current
566 * TSF and calculate dtim+cfp state for the result.
568 tsf = ath9k_hw_gettsf64(ah);
569 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
571 num_beacons = tsftu / intval + 1;
572 offset = tsftu % intval;
573 nexttbtt = tsftu - offset;
577 /* DTIM Beacon every dtimperiod Beacon */
578 dtim_dec_count = num_beacons % dtimperiod;
579 /* CFP every cfpperiod DTIM Beacon */
580 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
584 dtimcount -= dtim_dec_count;
586 dtimcount += dtimperiod;
588 cfpcount -= cfp_dec_count;
590 cfpcount += cfpperiod;
592 bs.bs_intval = intval;
593 bs.bs_nexttbtt = nexttbtt;
594 bs.bs_dtimperiod = dtimperiod*intval;
595 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
596 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
597 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
598 bs.bs_cfpmaxduration = 0;
601 * Calculate the number of consecutive beacons to miss* before taking
602 * a BMISS interrupt. The configuration is specified in TU so we only
603 * need calculate based on the beacon interval. Note that we clamp the
604 * result to at most 15 beacons.
606 if (sleepduration > intval) {
607 bs.bs_bmissthreshold = conf->listen_interval *
608 ATH_DEFAULT_BMISS_LIMIT / 2;
610 bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval);
611 if (bs.bs_bmissthreshold > 15)
612 bs.bs_bmissthreshold = 15;
613 else if (bs.bs_bmissthreshold <= 0)
614 bs.bs_bmissthreshold = 1;
618 * Calculate sleep duration. The configuration is given in ms.
619 * We ensure a multiple of the beacon period is used. Also, if the sleep
620 * duration is greater than the DTIM period then it makes senses
621 * to make it a multiple of that.
626 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
627 if (bs.bs_sleepduration > bs.bs_dtimperiod)
628 bs.bs_sleepduration = bs.bs_dtimperiod;
630 /* TSF out of range threshold fixed at 1 second */
631 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
633 ath_print(common, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
634 ath_print(common, ATH_DBG_BEACON,
635 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
636 bs.bs_bmissthreshold, bs.bs_sleepduration,
637 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
639 /* Set the computed STA beacon timers */
641 ath9k_hw_set_interrupts(ah, 0);
642 ath9k_hw_set_sta_beacon_timers(ah, &bs);
643 ah->imask |= ATH9K_INT_BMISS;
644 ath9k_hw_set_interrupts(ah, ah->imask);
647 static void ath_beacon_config_adhoc(struct ath_softc *sc,
648 struct ath_beacon_config *conf,
649 struct ieee80211_vif *vif)
651 struct ath_hw *ah = sc->sc_ah;
652 struct ath_common *common = ath9k_hw_common(ah);
654 u32 tsftu, intval, nexttbtt;
656 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
659 /* Pull nexttbtt forward to reflect the current TSF */
661 nexttbtt = TSF_TO_TU(sc->beacon.bc_tstamp >> 32, sc->beacon.bc_tstamp);
665 nexttbtt = roundup(nexttbtt, intval);
667 tsf = ath9k_hw_gettsf64(ah);
668 tsftu = TSF_TO_TU((u32)(tsf>>32), (u32)tsf) + FUDGE;
671 } while (nexttbtt < tsftu);
673 ath_print(common, ATH_DBG_BEACON,
674 "IBSS nexttbtt %u intval %u (%u)\n",
675 nexttbtt, intval, conf->beacon_interval);
678 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
679 * if we need to manually prepare beacon frames. Otherwise we use a
680 * self-linked tx descriptor and let the hardware deal with things.
682 intval |= ATH9K_BEACON_ENA;
683 ah->imask |= ATH9K_INT_SWBA;
685 ath_beaconq_config(sc);
687 /* Set the computed ADHOC beacon timers */
689 ath9k_hw_set_interrupts(ah, 0);
690 ath9k_beacon_init(sc, nexttbtt, intval);
691 sc->beacon.bmisscnt = 0;
692 ath9k_hw_set_interrupts(ah, ah->imask);
695 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
697 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
698 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
699 enum nl80211_iftype iftype;
701 /* Setup the beacon configuration parameters */
703 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
707 cur_conf->beacon_interval = bss_conf->beacon_int;
708 cur_conf->dtim_period = bss_conf->dtim_period;
709 cur_conf->listen_interval = 1;
710 cur_conf->dtim_count = 1;
711 cur_conf->bmiss_timeout =
712 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
714 iftype = sc->sc_ah->opmode;
718 * It looks like mac80211 may end up using beacon interval of zero in
719 * some cases (at least for mesh point). Avoid getting into an
720 * infinite loop by using a bit safer value instead. To be safe,
721 * do sanity check on beacon interval for all operating modes.
723 if (cur_conf->beacon_interval == 0)
724 cur_conf->beacon_interval = 100;
727 case NL80211_IFTYPE_AP:
728 ath_beacon_config_ap(sc, cur_conf);
730 case NL80211_IFTYPE_ADHOC:
731 case NL80211_IFTYPE_MESH_POINT:
732 ath_beacon_config_adhoc(sc, cur_conf, vif);
734 case NL80211_IFTYPE_STATION:
735 ath_beacon_config_sta(sc, cur_conf);
738 ath_print(common, ATH_DBG_CONFIG,
739 "Unsupported beaconing mode\n");
743 sc->sc_flags |= SC_OP_BEACONS;