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 static int ath_beaconq_config(struct ath_softc *sc)
28 struct ath_hw *ah = sc->sc_ah;
29 struct ath9k_tx_queue_info qi;
31 ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
32 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
33 /* Always burst out beacon and CAB traffic. */
38 /* Adhoc mode; important thing is to use 2x cwmin. */
39 qi.tqi_aifs = sc->beacon.beacon_qi.tqi_aifs;
40 qi.tqi_cwmin = 2*sc->beacon.beacon_qi.tqi_cwmin;
41 qi.tqi_cwmax = sc->beacon.beacon_qi.tqi_cwmax;
44 if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
45 DPRINTF(sc, ATH_DBG_FATAL,
46 "unable to update h/w beacon queue parameters\n");
49 ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
55 * Associates the beacon frame buffer with a transmit descriptor. Will set
56 * up all required antenna switch parameters, rate codes, and channel flags.
57 * Beacons are always sent out at the lowest rate, and are not retried.
59 static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
62 struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
63 struct ath_hw *ah = sc->sc_ah;
65 struct ath9k_11n_rate_series series[4];
66 struct ath_rate_table *rt;
67 int flags, antenna, ctsrate = 0, ctsduration = 0;
71 flags = ATH9K_TXDESC_NOACK;
73 if (((sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
74 (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) &&
75 (ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)) {
76 ds->ds_link = bf->bf_daddr; /* self-linked */
77 flags |= ATH9K_TXDESC_VEOL;
78 /* Let hardware handle antenna switching. */
83 * Switch antenna every beacon.
84 * Should only switch every beacon period, not for every SWBA
85 * XXX assumes two antennae
87 antenna = ((sc->beacon.ast_be_xmit / sc->nbcnvifs) & 1 ? 2 : 1);
90 ds->ds_data = bf->bf_buf_addr;
92 rt = sc->cur_rate_table;
93 rate = rt->info[0].ratecode;
94 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
95 rate |= rt->info[0].short_preamble;
97 ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
98 ATH9K_PKT_TYPE_BEACON,
100 ATH9K_TXKEYIX_INVALID,
101 ATH9K_KEY_TYPE_CLEAR,
104 /* NB: beacon's BufLen must be a multiple of 4 bytes */
105 ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
108 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
110 series[0].Rate = rate;
111 series[0].ChSel = sc->tx_chainmask;
112 series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
113 ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
117 static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
118 struct ieee80211_vif *vif)
120 struct ath_wiphy *aphy = hw->priv;
121 struct ath_softc *sc = aphy->sc;
125 struct ath_txq *cabq;
126 struct ieee80211_tx_info *info;
129 if (aphy->state != ATH_WIPHY_ACTIVE)
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(hw, vif);
157 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
160 info = IEEE80211_SKB_CB(skb);
161 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
163 * TODO: make sure the seq# gets assigned properly (vs. other
166 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
167 sc->tx.seq_no += 0x10;
168 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
169 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
172 bf->bf_buf_addr = bf->bf_dmacontext =
173 dma_map_single(sc->dev, skb->data,
174 skb->len, DMA_TO_DEVICE);
175 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
176 dev_kfree_skb_any(skb);
178 DPRINTF(sc, ATH_DBG_FATAL, "dma_mapping_error on beaconing\n");
182 skb = ieee80211_get_buffered_bc(hw, vif);
185 * if the CABQ traffic from previous DTIM is pending and the current
186 * beacon is also a DTIM.
187 * 1) if there is only one vif let the cab traffic continue.
188 * 2) if there are more than one vif and we are using staggered
189 * beacons, then drain the cabq by dropping all the frames in
190 * the cabq so that the current vifs cab traffic can be scheduled.
192 spin_lock_bh(&cabq->axq_lock);
193 cabq_depth = cabq->axq_depth;
194 spin_unlock_bh(&cabq->axq_lock);
196 if (skb && cabq_depth) {
198 DPRINTF(sc, ATH_DBG_BEACON,
199 "Flushing previous cabq traffic\n");
200 ath_draintxq(sc, cabq, false);
204 ath_beacon_setup(sc, avp, bf);
207 ath_tx_cabq(hw, skb);
208 skb = ieee80211_get_buffered_bc(hw, vif);
215 * Startup beacon transmission for adhoc mode when they are sent entirely
216 * by the hardware using the self-linked descriptor + veol trick.
218 static void ath_beacon_start_adhoc(struct ath_softc *sc,
219 struct ieee80211_vif *vif)
221 struct ath_hw *ah = sc->sc_ah;
226 avp = (void *)vif->drv_priv;
228 if (avp->av_bcbuf == NULL)
232 skb = (struct sk_buff *) bf->bf_mpdu;
234 ath_beacon_setup(sc, avp, bf);
236 /* NB: caller is known to have already stopped tx dma */
237 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
238 ath9k_hw_txstart(ah, sc->beacon.beaconq);
239 DPRINTF(sc, ATH_DBG_BEACON, "TXDP%u = %llx (%p)\n",
240 sc->beacon.beaconq, ito64(bf->bf_daddr), bf->bf_desc);
243 int ath_beaconq_setup(struct ath_hw *ah)
245 struct ath9k_tx_queue_info qi;
247 memset(&qi, 0, sizeof(qi));
251 /* NB: don't enable any interrupts */
252 return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
255 int ath_beacon_alloc(struct ath_wiphy *aphy, struct ieee80211_vif *vif)
257 struct ath_softc *sc = aphy->sc;
263 avp = (void *)vif->drv_priv;
265 /* Allocate a beacon descriptor if we haven't done so. */
266 if (!avp->av_bcbuf) {
267 /* Allocate beacon state for hostap/ibss. We know
268 * a buffer is available. */
269 avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf,
270 struct ath_buf, list);
271 list_del(&avp->av_bcbuf->list);
273 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP ||
274 !(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)) {
277 * Assign the vif to a beacon xmit slot. As
278 * above, this cannot fail to find one.
281 for (slot = 0; slot < ATH_BCBUF; slot++)
282 if (sc->beacon.bslot[slot] == NULL) {
284 * XXX hack, space out slots to better
287 if (slot+1 < ATH_BCBUF &&
288 sc->beacon.bslot[slot+1] == NULL) {
289 avp->av_bslot = slot+1;
292 avp->av_bslot = slot;
293 /* NB: keep looking for a double slot */
295 BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL);
296 sc->beacon.bslot[avp->av_bslot] = vif;
297 sc->beacon.bslot_aphy[avp->av_bslot] = aphy;
302 /* release the previous beacon frame, if it already exists. */
304 if (bf->bf_mpdu != NULL) {
305 skb = (struct sk_buff *)bf->bf_mpdu;
306 dma_unmap_single(sc->dev, bf->bf_dmacontext,
307 skb->len, DMA_TO_DEVICE);
308 dev_kfree_skb_any(skb);
312 /* NB: the beacon data buffer must be 32-bit aligned. */
313 skb = ieee80211_beacon_get(sc->hw, vif);
315 DPRINTF(sc, ATH_DBG_BEACON, "cannot get skb\n");
319 tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
320 sc->beacon.bc_tstamp = le64_to_cpu(tstamp);
321 /* Calculate a TSF adjustment factor required for staggered beacons. */
322 if (avp->av_bslot > 0) {
326 intval = sc->hw->conf.beacon_int ?
327 sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
330 * Calculate the TSF offset for this beacon slot, i.e., the
331 * number of usecs that need to be added to the timestamp field
332 * in Beacon and Probe Response frames. Beacon slot 0 is
333 * processed at the correct offset, so it does not require TSF
334 * adjustment. Other slots are adjusted to get the timestamp
335 * close to the TBTT for the BSS.
337 tsfadjust = intval * avp->av_bslot / ATH_BCBUF;
338 avp->tsf_adjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
340 DPRINTF(sc, ATH_DBG_BEACON,
341 "stagger beacons, bslot %d intval %u tsfadjust %llu\n",
342 avp->av_bslot, intval, (unsigned long long)tsfadjust);
344 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
347 avp->tsf_adjust = cpu_to_le64(0);
350 bf->bf_buf_addr = bf->bf_dmacontext =
351 dma_map_single(sc->dev, skb->data,
352 skb->len, DMA_TO_DEVICE);
353 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
354 dev_kfree_skb_any(skb);
356 DPRINTF(sc, ATH_DBG_FATAL,
357 "dma_mapping_error on beacon alloc\n");
364 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
366 if (avp->av_bcbuf != NULL) {
369 if (avp->av_bslot != -1) {
370 sc->beacon.bslot[avp->av_bslot] = NULL;
371 sc->beacon.bslot_aphy[avp->av_bslot] = NULL;
376 if (bf->bf_mpdu != NULL) {
377 struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
378 dma_unmap_single(sc->dev, bf->bf_dmacontext,
379 skb->len, DMA_TO_DEVICE);
380 dev_kfree_skb_any(skb);
383 list_add_tail(&bf->list, &sc->beacon.bbuf);
385 avp->av_bcbuf = NULL;
389 void ath_beacon_tasklet(unsigned long data)
391 struct ath_softc *sc = (struct ath_softc *)data;
392 struct ath_hw *ah = sc->sc_ah;
393 struct ath_buf *bf = NULL;
394 struct ieee80211_vif *vif;
395 struct ath_wiphy *aphy;
397 u32 bfaddr, bc = 0, tsftu;
402 * Check if the previous beacon has gone out. If
403 * not don't try to post another, skip this period
404 * and wait for the next. Missed beacons indicate
405 * a problem and should not occur. If we miss too
406 * many consecutive beacons reset the device.
408 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
409 sc->beacon.bmisscnt++;
411 if (sc->beacon.bmisscnt < BSTUCK_THRESH) {
412 DPRINTF(sc, ATH_DBG_BEACON,
413 "missed %u consecutive beacons\n",
414 sc->beacon.bmisscnt);
415 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
416 DPRINTF(sc, ATH_DBG_BEACON,
417 "beacon is officially stuck\n");
418 ath_reset(sc, false);
424 if (sc->beacon.bmisscnt != 0) {
425 DPRINTF(sc, ATH_DBG_BEACON,
426 "resume beacon xmit after %u misses\n",
427 sc->beacon.bmisscnt);
428 sc->beacon.bmisscnt = 0;
432 * Generate beacon frames. we are sending frames
433 * staggered so calculate the slot for this frame based
434 * on the tsf to safeguard against missing an swba.
437 intval = sc->hw->conf.beacon_int ?
438 sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
440 tsf = ath9k_hw_gettsf64(ah);
441 tsftu = TSF_TO_TU(tsf>>32, tsf);
442 slot = ((tsftu % intval) * ATH_BCBUF) / intval;
444 * Reverse the slot order to get slot 0 on the TBTT offset that does
445 * not require TSF adjustment and other slots adding
446 * slot/ATH_BCBUF * beacon_int to timestamp. For example, with
447 * ATH_BCBUF = 4, we process beacon slots as follows: 3 2 1 0 3 2 1 ..
448 * and slot 0 is at correct offset to TBTT.
450 slot = ATH_BCBUF - slot - 1;
451 vif = sc->beacon.bslot[slot];
452 aphy = sc->beacon.bslot_aphy[slot];
454 DPRINTF(sc, ATH_DBG_BEACON,
455 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
456 slot, tsf, tsftu, intval, vif);
460 bf = ath_beacon_generate(aphy->hw, vif);
462 bfaddr = bf->bf_daddr;
468 * Handle slot time change when a non-ERP station joins/leaves
469 * an 11g network. The 802.11 layer notifies us via callback,
470 * we mark updateslot, then wait one beacon before effecting
471 * the change. This gives associated stations at least one
472 * beacon interval to note the state change.
474 * NB: The slot time change state machine is clocked according
475 * to whether we are bursting or staggering beacons. We
476 * recognize the request to update and record the current
477 * slot then don't transition until that slot is reached
478 * again. If we miss a beacon for that slot then we'll be
479 * slow to transition but we'll be sure at least one beacon
480 * interval has passed. When bursting slot is always left
481 * set to ATH_BCBUF so this check is a noop.
483 if (sc->beacon.updateslot == UPDATE) {
484 sc->beacon.updateslot = COMMIT; /* commit next beacon */
485 sc->beacon.slotupdate = slot;
486 } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
487 ath9k_hw_setslottime(sc->sc_ah, sc->beacon.slottime);
488 sc->beacon.updateslot = OK;
492 * Stop any current dma and put the new frame(s) on the queue.
493 * This should never fail since we check above that no frames
494 * are still pending on the queue.
496 if (!ath9k_hw_stoptxdma(ah, sc->beacon.beaconq)) {
497 DPRINTF(sc, ATH_DBG_FATAL,
498 "beacon queue %u did not stop?\n", sc->beacon.beaconq);
501 /* NB: cabq traffic should already be queued and primed */
502 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
503 ath9k_hw_txstart(ah, sc->beacon.beaconq);
505 sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */
510 * For multi-bss ap support beacons are either staggered evenly over N slots or
511 * burst together. For the former arrange for the SWBA to be delivered for each
512 * slot. Slots that are not occupied will generate nothing.
514 static void ath_beacon_config_ap(struct ath_softc *sc,
515 struct ath_beacon_config *conf,
518 u32 nexttbtt, intval;
520 /* Configure the timers only when the TSF has to be reset */
522 if (!(sc->sc_flags & SC_OP_TSF_RESET))
525 /* NB: the beacon interval is kept internally in TU's */
526 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
527 intval /= ATH_BCBUF; /* for staggered beacons */
529 intval |= ATH9K_BEACON_RESET_TSF;
532 * In AP mode we enable the beacon timers and SWBA interrupts to
533 * prepare beacon frames.
535 intval |= ATH9K_BEACON_ENA;
536 sc->imask |= ATH9K_INT_SWBA;
537 ath_beaconq_config(sc);
539 /* Set the computed AP beacon timers */
541 ath9k_hw_set_interrupts(sc->sc_ah, 0);
542 ath9k_hw_beaconinit(sc->sc_ah, nexttbtt, intval);
543 sc->beacon.bmisscnt = 0;
544 ath9k_hw_set_interrupts(sc->sc_ah, sc->imask);
546 /* Clear the reset TSF flag, so that subsequent beacon updation
547 will not reset the HW TSF. */
549 sc->sc_flags &= ~SC_OP_TSF_RESET;
553 * This sets up the beacon timers according to the timestamp of the last
554 * received beacon and the current TSF, configures PCF and DTIM
555 * handling, programs the sleep registers so the hardware will wakeup in
556 * time to receive beacons, and configures the beacon miss handling so
557 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
558 * we've associated with.
560 static void ath_beacon_config_sta(struct ath_softc *sc,
561 struct ath_beacon_config *conf,
564 struct ath9k_beacon_state bs;
565 int dtimperiod, dtimcount, sleepduration;
566 int cfpperiod, cfpcount;
567 u32 nexttbtt = 0, intval, tsftu;
570 memset(&bs, 0, sizeof(bs));
571 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
574 * Setup dtim and cfp parameters according to
575 * last beacon we received (which may be none).
577 dtimperiod = conf->dtim_period;
578 if (dtimperiod <= 0) /* NB: 0 if not known */
580 dtimcount = conf->dtim_count;
581 if (dtimcount >= dtimperiod) /* NB: sanity check */
583 cfpperiod = 1; /* NB: no PCF support yet */
586 sleepduration = conf->listen_interval * intval;
587 if (sleepduration <= 0)
588 sleepduration = intval;
591 * Pull nexttbtt forward to reflect the current
592 * TSF and calculate dtim+cfp state for the result.
594 tsf = ath9k_hw_gettsf64(sc->sc_ah);
595 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
598 if (--dtimcount < 0) {
599 dtimcount = dtimperiod - 1;
601 cfpcount = cfpperiod - 1;
603 } while (nexttbtt < tsftu);
605 bs.bs_intval = intval;
606 bs.bs_nexttbtt = nexttbtt;
607 bs.bs_dtimperiod = dtimperiod*intval;
608 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
609 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
610 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
611 bs.bs_cfpmaxduration = 0;
614 * Calculate the number of consecutive beacons to miss* before taking
615 * a BMISS interrupt. The configuration is specified in TU so we only
616 * need calculate based on the beacon interval. Note that we clamp the
617 * result to at most 15 beacons.
619 if (sleepduration > intval) {
620 bs.bs_bmissthreshold = conf->listen_interval *
621 ATH_DEFAULT_BMISS_LIMIT / 2;
623 bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval);
624 if (bs.bs_bmissthreshold > 15)
625 bs.bs_bmissthreshold = 15;
626 else if (bs.bs_bmissthreshold <= 0)
627 bs.bs_bmissthreshold = 1;
631 * Calculate sleep duration. The configuration is given in ms.
632 * We ensure a multiple of the beacon period is used. Also, if the sleep
633 * duration is greater than the DTIM period then it makes senses
634 * to make it a multiple of that.
639 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
640 if (bs.bs_sleepduration > bs.bs_dtimperiod)
641 bs.bs_sleepduration = bs.bs_dtimperiod;
643 /* TSF out of range threshold fixed at 1 second */
644 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
646 DPRINTF(sc, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
647 DPRINTF(sc, ATH_DBG_BEACON,
648 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
649 bs.bs_bmissthreshold, bs.bs_sleepduration,
650 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
652 /* Set the computed STA beacon timers */
654 ath9k_hw_set_interrupts(sc->sc_ah, 0);
655 ath9k_hw_set_sta_beacon_timers(sc->sc_ah, &bs);
656 sc->imask |= ATH9K_INT_BMISS;
657 ath9k_hw_set_interrupts(sc->sc_ah, sc->imask);
660 static void ath_beacon_config_adhoc(struct ath_softc *sc,
661 struct ath_beacon_config *conf,
663 struct ieee80211_vif *vif)
666 u32 tsftu, intval, nexttbtt;
668 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
670 /* Pull nexttbtt forward to reflect the current TSF */
672 nexttbtt = TSF_TO_TU(sc->beacon.bc_tstamp >> 32, sc->beacon.bc_tstamp);
676 nexttbtt = roundup(nexttbtt, intval);
678 tsf = ath9k_hw_gettsf64(sc->sc_ah);
679 tsftu = TSF_TO_TU((u32)(tsf>>32), (u32)tsf) + FUDGE;
682 } while (nexttbtt < tsftu);
684 DPRINTF(sc, ATH_DBG_BEACON,
685 "IBSS nexttbtt %u intval %u (%u)\n",
686 nexttbtt, intval, conf->beacon_interval);
689 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
690 * if we need to manually prepare beacon frames. Otherwise we use a
691 * self-linked tx descriptor and let the hardware deal with things.
693 intval |= ATH9K_BEACON_ENA;
694 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL))
695 sc->imask |= ATH9K_INT_SWBA;
697 ath_beaconq_config(sc);
699 /* Set the computed ADHOC beacon timers */
701 ath9k_hw_set_interrupts(sc->sc_ah, 0);
702 ath9k_hw_beaconinit(sc->sc_ah, nexttbtt, intval);
703 sc->beacon.bmisscnt = 0;
704 ath9k_hw_set_interrupts(sc->sc_ah, sc->imask);
706 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)
707 ath_beacon_start_adhoc(sc, vif);
710 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
712 struct ath_beacon_config conf;
714 /* Setup the beacon configuration parameters */
716 memset(&conf, 0, sizeof(struct ath_beacon_config));
717 conf.beacon_interval = sc->hw->conf.beacon_int ?
718 sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL;
719 conf.listen_interval = 1;
720 conf.dtim_period = conf.beacon_interval;
722 conf.bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf.beacon_interval;
725 struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
727 switch(avp->av_opmode) {
728 case NL80211_IFTYPE_AP:
729 ath_beacon_config_ap(sc, &conf, avp);
731 case NL80211_IFTYPE_ADHOC:
732 case NL80211_IFTYPE_MESH_POINT:
733 ath_beacon_config_adhoc(sc, &conf, avp, vif);
735 case NL80211_IFTYPE_STATION:
736 ath_beacon_config_sta(sc, &conf, avp);
739 DPRINTF(sc, ATH_DBG_CONFIG,
740 "Unsupported beaconing mode\n");
744 sc->sc_flags |= SC_OP_BEACONS;