2 * Copyright (c) 2008 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.
20 * This function will modify certain transmit queue properties depending on
21 * the operating mode of the station (AP or AdHoc). Parameters are AIFS
22 * settings and channel width min/max
24 static int ath_beaconq_config(struct ath_softc *sc)
26 struct ath_hw *ah = sc->sc_ah;
27 struct ath9k_tx_queue_info qi;
29 ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
30 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
31 /* Always burst out beacon and CAB traffic. */
36 /* Adhoc mode; important thing is to use 2x cwmin. */
37 qi.tqi_aifs = sc->beacon.beacon_qi.tqi_aifs;
38 qi.tqi_cwmin = 2*sc->beacon.beacon_qi.tqi_cwmin;
39 qi.tqi_cwmax = sc->beacon.beacon_qi.tqi_cwmax;
42 if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
43 DPRINTF(sc, ATH_DBG_FATAL,
44 "unable to update h/w beacon queue parameters\n");
47 ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
52 static void ath_bstuck_process(struct ath_softc *sc)
54 DPRINTF(sc, ATH_DBG_BEACON, "stuck beacon; resetting (bmiss count %u)\n",
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,
67 struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
68 struct ath_hw *ah = sc->sc_ah;
70 struct ath9k_11n_rate_series series[4];
71 struct ath_rate_table *rt;
72 int flags, antenna, ctsrate = 0, ctsduration = 0;
76 flags = ATH9K_TXDESC_NOACK;
78 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC &&
79 (ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)) {
80 ds->ds_link = bf->bf_daddr; /* self-linked */
81 flags |= ATH9K_TXDESC_VEOL;
82 /* Let hardware handle antenna switching. */
87 * Switch antenna every beacon.
88 * Should only switch every beacon period, not for every SWBA
89 * XXX assumes two antennae
91 antenna = ((sc->beacon.ast_be_xmit / sc->nbcnvifs) & 1 ? 2 : 1);
94 ds->ds_data = bf->bf_buf_addr;
96 rt = sc->cur_rate_table;
97 rate = rt->info[0].ratecode;
98 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
99 rate |= rt->info[0].short_preamble;
101 ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
102 ATH9K_PKT_TYPE_BEACON,
104 ATH9K_TXKEYIX_INVALID,
105 ATH9K_KEY_TYPE_CLEAR,
108 /* NB: beacon's BufLen must be a multiple of 4 bytes */
109 ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
112 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
114 series[0].Rate = rate;
115 series[0].ChSel = sc->tx_chainmask;
116 series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
117 ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
121 static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id)
126 struct ath_txq *cabq;
127 struct ieee80211_vif *vif;
128 struct ieee80211_tx_info *info;
131 vif = sc->vifs[if_id];
132 avp = (void *)vif->drv_priv;
133 cabq = sc->beacon.cabq;
135 if (avp->av_bcbuf == NULL) {
136 DPRINTF(sc, ATH_DBG_BEACON, "avp=%p av_bcbuf=%p\n",
141 /* Release the old beacon first */
144 skb = (struct sk_buff *)bf->bf_mpdu;
146 dma_unmap_single(sc->dev, bf->bf_dmacontext,
147 skb->len, DMA_TO_DEVICE);
148 dev_kfree_skb_any(skb);
151 /* Get a new beacon from mac80211 */
153 skb = ieee80211_beacon_get(sc->hw, vif);
158 info = IEEE80211_SKB_CB(skb);
159 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
161 * TODO: make sure the seq# gets assigned properly (vs. other
164 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
165 sc->tx.seq_no += 0x10;
166 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
167 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
170 bf->bf_buf_addr = bf->bf_dmacontext =
171 dma_map_single(sc->dev, skb->data,
172 skb->len, DMA_TO_DEVICE);
173 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
174 dev_kfree_skb_any(skb);
176 DPRINTF(sc, ATH_DBG_FATAL, "dma_mapping_error on beaconing\n");
180 skb = ieee80211_get_buffered_bc(sc->hw, vif);
183 * if the CABQ traffic from previous DTIM is pending and the current
184 * beacon is also a DTIM.
185 * 1) if there is only one vif let the cab traffic continue.
186 * 2) if there are more than one vif and we are using staggered
187 * beacons, then drain the cabq by dropping all the frames in
188 * the cabq so that the current vifs cab traffic can be scheduled.
190 spin_lock_bh(&cabq->axq_lock);
191 cabq_depth = cabq->axq_depth;
192 spin_unlock_bh(&cabq->axq_lock);
194 if (skb && cabq_depth) {
196 DPRINTF(sc, ATH_DBG_BEACON,
197 "Flushing previous cabq traffic\n");
198 ath_draintxq(sc, cabq, false);
202 ath_beacon_setup(sc, avp, bf);
205 ath_tx_cabq(sc, skb);
206 skb = ieee80211_get_buffered_bc(sc->hw, vif);
213 * Startup beacon transmission for adhoc mode when they are sent entirely
214 * by the hardware using the self-linked descriptor + veol trick.
216 static void ath_beacon_start_adhoc(struct ath_softc *sc, int if_id)
218 struct ieee80211_vif *vif;
219 struct ath_hw *ah = sc->sc_ah;
224 vif = sc->vifs[if_id];
225 avp = (void *)vif->drv_priv;
227 if (avp->av_bcbuf == NULL)
231 skb = (struct sk_buff *) bf->bf_mpdu;
233 ath_beacon_setup(sc, avp, bf);
235 /* NB: caller is known to have already stopped tx dma */
236 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
237 ath9k_hw_txstart(ah, sc->beacon.beaconq);
238 DPRINTF(sc, ATH_DBG_BEACON, "TXDP%u = %llx (%p)\n",
239 sc->beacon.beaconq, ito64(bf->bf_daddr), bf->bf_desc);
242 int ath_beaconq_setup(struct ath_hw *ah)
244 struct ath9k_tx_queue_info qi;
246 memset(&qi, 0, sizeof(qi));
250 /* NB: don't enable any interrupts */
251 return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
254 int ath_beacon_alloc(struct ath_softc *sc, int if_id)
256 struct ieee80211_vif *vif;
258 struct ieee80211_hdr *hdr;
263 vif = sc->vifs[if_id];
264 avp = (void *)vif->drv_priv;
266 /* Allocate a beacon descriptor if we haven't done so. */
267 if (!avp->av_bcbuf) {
268 /* Allocate beacon state for hostap/ibss. We know
269 * a buffer is available. */
270 avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf,
271 struct ath_buf, list);
272 list_del(&avp->av_bcbuf->list);
274 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP ||
275 !(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)) {
278 * Assign the vif to a beacon xmit slot. As
279 * above, this cannot fail to find one.
282 for (slot = 0; slot < ATH_BCBUF; slot++)
283 if (sc->beacon.bslot[slot] == ATH_IF_ID_ANY) {
285 * XXX hack, space out slots to better
288 if (slot+1 < ATH_BCBUF &&
289 sc->beacon.bslot[slot+1] ==
291 avp->av_bslot = slot+1;
294 avp->av_bslot = slot;
295 /* NB: keep looking for a double slot */
297 BUG_ON(sc->beacon.bslot[avp->av_bslot] != ATH_IF_ID_ANY);
298 sc->beacon.bslot[avp->av_bslot] = if_id;
303 /* release the previous beacon frame, if it already exists. */
305 if (bf->bf_mpdu != NULL) {
306 skb = (struct sk_buff *)bf->bf_mpdu;
307 dma_unmap_single(sc->dev, bf->bf_dmacontext,
308 skb->len, DMA_TO_DEVICE);
309 dev_kfree_skb_any(skb);
313 /* NB: the beacon data buffer must be 32-bit aligned. */
314 skb = ieee80211_beacon_get(sc->hw, vif);
316 DPRINTF(sc, ATH_DBG_BEACON, "cannot get skb\n");
320 tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
321 sc->beacon.bc_tstamp = le64_to_cpu(tstamp);
324 * Calculate a TSF adjustment factor required for
325 * staggered beacons. Note that we assume the format
326 * of the beacon frame leaves the tstamp field immediately
327 * following the header.
329 if (avp->av_bslot > 0) {
334 intval = sc->hw->conf.beacon_int ?
335 sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
338 * The beacon interval is in TU's; the TSF in usecs.
339 * We figure out how many TU's to add to align the
340 * timestamp then convert to TSF units and handle
341 * byte swapping before writing it in the frame.
342 * The hardware will then add this each time a beacon
343 * frame is sent. Note that we align vif's 1..N
344 * and leave vif 0 untouched. This means vap 0
345 * has a timestamp in one beacon interval while the
346 * others get a timestamp aligned to the next interval.
348 tsfadjust = (intval * (ATH_BCBUF - avp->av_bslot)) / ATH_BCBUF;
349 val = cpu_to_le64(tsfadjust << 10); /* TU->TSF */
351 DPRINTF(sc, ATH_DBG_BEACON,
352 "stagger beacons, bslot %d intval %u tsfadjust %llu\n",
353 avp->av_bslot, intval, (unsigned long long)tsfadjust);
355 hdr = (struct ieee80211_hdr *)skb->data;
356 memcpy(&hdr[1], &val, sizeof(val));
360 bf->bf_buf_addr = bf->bf_dmacontext =
361 dma_map_single(sc->dev, skb->data,
362 skb->len, DMA_TO_DEVICE);
363 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
364 dev_kfree_skb_any(skb);
366 DPRINTF(sc, ATH_DBG_FATAL,
367 "dma_mapping_error on beacon alloc\n");
374 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
376 if (avp->av_bcbuf != NULL) {
379 if (avp->av_bslot != -1) {
380 sc->beacon.bslot[avp->av_bslot] = ATH_IF_ID_ANY;
385 if (bf->bf_mpdu != NULL) {
386 struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
387 dma_unmap_single(sc->dev, bf->bf_dmacontext,
388 skb->len, DMA_TO_DEVICE);
389 dev_kfree_skb_any(skb);
392 list_add_tail(&bf->list, &sc->beacon.bbuf);
394 avp->av_bcbuf = NULL;
398 void ath_beacon_tasklet(unsigned long data)
400 struct ath_softc *sc = (struct ath_softc *)data;
401 struct ath_hw *ah = sc->sc_ah;
402 struct ath_buf *bf = NULL;
404 u32 bfaddr, show_cycles = 0, bc = 0, tsftu;
405 u32 rx_clear = 0, rx_frame = 0, tx_frame = 0;
409 if (sc->sc_flags & SC_OP_NO_RESET) {
410 show_cycles = ath9k_hw_GetMibCycleCountsPct(ah,
411 &rx_clear, &rx_frame, &tx_frame);
415 * Check if the previous beacon has gone out. If
416 * not don't try to post another, skip this period
417 * and wait for the next. Missed beacons indicate
418 * a problem and should not occur. If we miss too
419 * many consecutive beacons reset the device.
421 * FIXME: Clean up this mess !!
423 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
424 sc->beacon.bmisscnt++;
425 /* XXX: doth needs the chanchange IE countdown decremented.
426 * We should consider adding a mac80211 call to indicate
427 * a beacon miss so appropriate action could be taken
430 if (sc->beacon.bmisscnt < BSTUCK_THRESH) {
431 if (sc->sc_flags & SC_OP_NO_RESET) {
432 DPRINTF(sc, ATH_DBG_BEACON,
433 "missed %u consecutive beacons\n",
434 sc->beacon.bmisscnt);
437 * Display cycle counter stats from HW
438 * to aide in debug of stickiness.
440 DPRINTF(sc, ATH_DBG_BEACON,
441 "busy times: rx_clear=%d, "
442 "rx_frame=%d, tx_frame=%d\n",
446 DPRINTF(sc, ATH_DBG_BEACON,
451 DPRINTF(sc, ATH_DBG_BEACON,
452 "missed %u consecutive beacons\n",
453 sc->beacon.bmisscnt);
455 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
456 if (sc->sc_flags & SC_OP_NO_RESET) {
457 if (sc->beacon.bmisscnt == BSTUCK_THRESH) {
458 DPRINTF(sc, ATH_DBG_BEACON,
459 "beacon is officially "
463 DPRINTF(sc, ATH_DBG_BEACON,
464 "beacon is officially stuck\n");
465 ath_bstuck_process(sc);
471 if (sc->beacon.bmisscnt != 0) {
472 if (sc->sc_flags & SC_OP_NO_RESET) {
473 DPRINTF(sc, ATH_DBG_BEACON,
474 "resume beacon xmit after %u misses\n",
475 sc->beacon.bmisscnt);
477 DPRINTF(sc, ATH_DBG_BEACON,
478 "resume beacon xmit after %u misses\n",
479 sc->beacon.bmisscnt);
481 sc->beacon.bmisscnt = 0;
485 * Generate beacon frames. we are sending frames
486 * staggered so calculate the slot for this frame based
487 * on the tsf to safeguard against missing an swba.
490 intval = sc->hw->conf.beacon_int ?
491 sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
493 tsf = ath9k_hw_gettsf64(ah);
494 tsftu = TSF_TO_TU(tsf>>32, tsf);
495 slot = ((tsftu % intval) * ATH_BCBUF) / intval;
496 if_id = sc->beacon.bslot[(slot + 1) % ATH_BCBUF];
498 DPRINTF(sc, ATH_DBG_BEACON,
499 "slot %d [tsf %llu tsftu %u intval %u] if_id %d\n",
500 slot, (unsigned long long)tsf, tsftu,
504 if (if_id != ATH_IF_ID_ANY) {
505 bf = ath_beacon_generate(sc, if_id);
507 bfaddr = bf->bf_daddr;
512 * Handle slot time change when a non-ERP station joins/leaves
513 * an 11g network. The 802.11 layer notifies us via callback,
514 * we mark updateslot, then wait one beacon before effecting
515 * the change. This gives associated stations at least one
516 * beacon interval to note the state change.
518 * NB: The slot time change state machine is clocked according
519 * to whether we are bursting or staggering beacons. We
520 * recognize the request to update and record the current
521 * slot then don't transition until that slot is reached
522 * again. If we miss a beacon for that slot then we'll be
523 * slow to transition but we'll be sure at least one beacon
524 * interval has passed. When bursting slot is always left
525 * set to ATH_BCBUF so this check is a noop.
528 if (sc->beacon.updateslot == UPDATE) {
529 sc->beacon.updateslot = COMMIT; /* commit next beacon */
530 sc->beacon.slotupdate = slot;
531 } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
532 ath9k_hw_setslottime(sc->sc_ah, sc->beacon.slottime);
533 sc->beacon.updateslot = OK;
537 * Stop any current dma and put the new frame(s) on the queue.
538 * This should never fail since we check above that no frames
539 * are still pending on the queue.
541 if (!ath9k_hw_stoptxdma(ah, sc->beacon.beaconq)) {
542 DPRINTF(sc, ATH_DBG_FATAL,
543 "beacon queue %u did not stop?\n", sc->beacon.beaconq);
544 /* NB: the HAL still stops DMA, so proceed */
547 /* NB: cabq traffic should already be queued and primed */
548 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
549 ath9k_hw_txstart(ah, sc->beacon.beaconq);
551 sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */
556 * Configure the beacon and sleep timers.
558 * When operating as an AP this resets the TSF and sets
559 * up the hardware to notify us when we need to issue beacons.
561 * When operating in station mode this sets up the beacon
562 * timers according to the timestamp of the last received
563 * beacon and the current TSF, configures PCF and DTIM
564 * handling, programs the sleep registers so the hardware
565 * will wakeup in time to receive beacons, and configures
566 * the beacon miss handling so we'll receive a BMISS
567 * interrupt when we stop seeing beacons from the AP
568 * we've associated with.
570 void ath_beacon_config(struct ath_softc *sc, int if_id)
572 struct ieee80211_vif *vif;
573 struct ath_hw *ah = sc->sc_ah;
574 struct ath_beacon_config conf;
576 enum nl80211_iftype opmode;
577 u32 nexttbtt, intval;
579 if (if_id != ATH_IF_ID_ANY) {
580 vif = sc->vifs[if_id];
581 avp = (void *)vif->drv_priv;
582 opmode = avp->av_opmode;
584 opmode = sc->sc_ah->opmode;
587 memset(&conf, 0, sizeof(struct ath_beacon_config));
589 conf.beacon_interval = sc->hw->conf.beacon_int ?
590 sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
591 conf.listen_interval = 1;
592 conf.dtim_period = conf.beacon_interval;
594 conf.bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf.beacon_interval;
596 /* extract tstamp from last beacon and convert to TU */
597 nexttbtt = TSF_TO_TU(sc->beacon.bc_tstamp >> 32, sc->beacon.bc_tstamp);
599 /* XXX conditionalize multi-bss support? */
600 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
602 * For multi-bss ap support beacons are either staggered
603 * evenly over N slots or burst together. For the former
604 * arrange for the SWBA to be delivered for each slot.
605 * Slots that are not occupied will generate nothing.
607 /* NB: the beacon interval is kept internally in TU's */
608 intval = conf.beacon_interval & ATH9K_BEACON_PERIOD;
609 intval /= ATH_BCBUF; /* for staggered beacons */
611 intval = conf.beacon_interval & ATH9K_BEACON_PERIOD;
614 if (nexttbtt == 0) /* e.g. for ap mode */
616 else if (intval) /* NB: can be 0 for monitor mode */
617 nexttbtt = roundup(nexttbtt, intval);
619 DPRINTF(sc, ATH_DBG_BEACON, "nexttbtt %u intval %u (%u)\n",
620 nexttbtt, intval, conf.beacon_interval);
622 /* Check for NL80211_IFTYPE_AP and sc_nostabeacons for WDS client */
623 if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) {
624 struct ath9k_beacon_state bs;
627 int dtimperiod, dtimcount, sleepduration;
628 int cfpperiod, cfpcount;
631 * Setup dtim and cfp parameters according to
632 * last beacon we received (which may be none).
634 dtimperiod = conf.dtim_period;
635 if (dtimperiod <= 0) /* NB: 0 if not known */
637 dtimcount = conf.dtim_count;
638 if (dtimcount >= dtimperiod) /* NB: sanity check */
640 cfpperiod = 1; /* NB: no PCF support yet */
643 sleepduration = conf.listen_interval * intval;
644 if (sleepduration <= 0)
645 sleepduration = intval;
649 * Pull nexttbtt forward to reflect the current
650 * TSF and calculate dtim+cfp state for the result.
652 tsf = ath9k_hw_gettsf64(ah);
653 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
656 if (--dtimcount < 0) {
657 dtimcount = dtimperiod - 1;
659 cfpcount = cfpperiod - 1;
661 } while (nexttbtt < tsftu);
663 memset(&bs, 0, sizeof(bs));
664 bs.bs_intval = intval;
665 bs.bs_nexttbtt = nexttbtt;
666 bs.bs_dtimperiod = dtimperiod*intval;
667 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
668 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
669 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
670 bs.bs_cfpmaxduration = 0;
673 * Calculate the number of consecutive beacons to miss
674 * before taking a BMISS interrupt. The configuration
675 * is specified in TU so we only need calculate based
676 * on the beacon interval. Note that we clamp the
677 * result to at most 15 beacons.
679 if (sleepduration > intval) {
680 bs.bs_bmissthreshold = conf.listen_interval *
681 ATH_DEFAULT_BMISS_LIMIT / 2;
683 bs.bs_bmissthreshold =
684 DIV_ROUND_UP(conf.bmiss_timeout, intval);
685 if (bs.bs_bmissthreshold > 15)
686 bs.bs_bmissthreshold = 15;
687 else if (bs.bs_bmissthreshold <= 0)
688 bs.bs_bmissthreshold = 1;
692 * Calculate sleep duration. The configuration is
693 * given in ms. We insure a multiple of the beacon
694 * period is used. Also, if the sleep duration is
695 * greater than the DTIM period then it makes senses
696 * to make it a multiple of that.
701 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100),
703 if (bs.bs_sleepduration > bs.bs_dtimperiod)
704 bs.bs_sleepduration = bs.bs_dtimperiod;
706 /* TSF out of range threshold fixed at 1 second */
707 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
709 DPRINTF(sc, ATH_DBG_BEACON,
710 "tsf: %llu tsftu: %u\n", tsf, tsftu);
711 DPRINTF(sc, ATH_DBG_BEACON,
712 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
713 bs.bs_bmissthreshold, bs.bs_sleepduration,
714 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
716 ath9k_hw_set_interrupts(ah, 0);
717 ath9k_hw_set_sta_beacon_timers(ah, &bs);
718 sc->imask |= ATH9K_INT_BMISS;
719 ath9k_hw_set_interrupts(ah, sc->imask);
724 ath9k_hw_set_interrupts(ah, 0);
725 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) {
726 /* Pull nexttbtt forward to reflect the current TSF */
728 if (!(intval & ATH9K_BEACON_RESET_TSF)) {
729 tsf = ath9k_hw_gettsf64(ah);
730 tsftu = TSF_TO_TU((u32)(tsf>>32),
734 } while (nexttbtt < tsftu);
737 DPRINTF(sc, ATH_DBG_BEACON,
738 "IBSS nexttbtt %u intval %u (%u)\n",
739 nexttbtt, intval & ~ATH9K_BEACON_RESET_TSF,
740 conf.beacon_interval);
743 * In IBSS mode enable the beacon timers but only
744 * enable SWBA interrupts if we need to manually
745 * prepare beacon frames. Otherwise we use a
746 * self-linked tx descriptor and let the hardware
749 intval |= ATH9K_BEACON_ENA;
750 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_VEOL))
751 sc->imask |= ATH9K_INT_SWBA;
752 ath_beaconq_config(sc);
753 } else if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
754 if (nexttbtt == intval)
755 intval |= ATH9K_BEACON_RESET_TSF;
757 * In AP mode we enable the beacon timers and
758 * SWBA interrupts to prepare beacon frames.
760 intval |= ATH9K_BEACON_ENA;
761 sc->imask |= ATH9K_INT_SWBA;
762 ath_beaconq_config(sc);
765 ath9k_hw_beaconinit(ah, nexttbtt, intval);
766 sc->beacon.bmisscnt = 0;
767 ath9k_hw_set_interrupts(ah, sc->imask);
770 * When using a self-linked beacon descriptor in
771 * ibss mode load it once here.
773 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC &&
774 (ah->caps.hw_caps & ATH9K_HW_CAP_VEOL))
775 ath_beacon_start_adhoc(sc, 0);
779 void ath_beacon_sync(struct ath_softc *sc, int if_id)
782 * Resync beacon timers using the tsf of the
783 * beacon frame we just received.
785 ath_beacon_config(sc, if_id);
786 sc->sc_flags |= SC_OP_BEACONS;