2 * Copyright (c) 2008-2011 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 txq = sc->tx.txq_map[WME_AC_BE];
42 ath9k_hw_get_txq_props(ah, txq->axq_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)) {
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 rate codes, and channel flags. Beacons are always sent out at the
61 * 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, ctsrate = 0, ctsduration = 0;
72 struct ieee80211_supported_band *sband;
76 flags = ATH9K_TXDESC_NOACK;
80 sband = &sc->sbands[common->hw->conf.channel->band];
81 rate = sband->bitrates[rateidx].hw_value;
82 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
83 rate |= sband->bitrates[rateidx].hw_value_short;
85 ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
86 ATH9K_PKT_TYPE_BEACON,
88 ATH9K_TXKEYIX_INVALID,
92 /* NB: beacon's BufLen must be a multiple of 4 bytes */
93 ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
94 true, true, ds, bf->bf_buf_addr,
97 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
99 series[0].Rate = rate;
100 series[0].ChSel = ath_txchainmask_reduction(sc,
101 common->tx_chainmask, series[0].Rate);
102 series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
103 ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
107 static void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
109 struct ath_softc *sc = hw->priv;
110 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
111 struct ath_tx_control txctl;
113 memset(&txctl, 0, sizeof(struct ath_tx_control));
114 txctl.txq = sc->beacon.cabq;
116 ath_dbg(common, ATH_DBG_XMIT,
117 "transmitting CABQ packet, skb: %p\n", skb);
119 if (ath_tx_start(hw, skb, &txctl) != 0) {
120 ath_dbg(common, ATH_DBG_XMIT, "CABQ TX failed\n");
121 dev_kfree_skb_any(skb);
125 static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
126 struct ieee80211_vif *vif)
128 struct ath_softc *sc = hw->priv;
129 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
133 struct ath_txq *cabq;
134 struct ieee80211_tx_info *info;
137 avp = (void *)vif->drv_priv;
138 cabq = sc->beacon.cabq;
140 if ((avp->av_bcbuf == NULL) || !avp->is_bslot_active)
143 /* Release the old beacon first */
148 dma_unmap_single(sc->dev, bf->bf_buf_addr,
149 skb->len, DMA_TO_DEVICE);
150 dev_kfree_skb_any(skb);
154 /* Get a new beacon from mac80211 */
156 skb = ieee80211_beacon_get(hw, vif);
160 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
163 info = IEEE80211_SKB_CB(skb);
164 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
166 * TODO: make sure the seq# gets assigned properly (vs. other
169 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
170 sc->tx.seq_no += 0x10;
171 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
172 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
175 bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
176 skb->len, DMA_TO_DEVICE);
177 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
178 dev_kfree_skb_any(skb);
181 ath_err(common, "dma_mapping_error on beaconing\n");
185 skb = ieee80211_get_buffered_bc(hw, vif);
188 * if the CABQ traffic from previous DTIM is pending and the current
189 * beacon is also a DTIM.
190 * 1) if there is only one vif let the cab traffic continue.
191 * 2) if there are more than one vif and we are using staggered
192 * beacons, then drain the cabq by dropping all the frames in
193 * the cabq so that the current vifs cab traffic can be scheduled.
195 spin_lock_bh(&cabq->axq_lock);
196 cabq_depth = cabq->axq_depth;
197 spin_unlock_bh(&cabq->axq_lock);
199 if (skb && cabq_depth) {
201 ath_dbg(common, ATH_DBG_BEACON,
202 "Flushing previous cabq traffic\n");
203 ath_draintxq(sc, cabq, false);
207 ath_beacon_setup(sc, avp, bf, info->control.rates[0].idx);
210 ath_tx_cabq(hw, skb);
211 skb = ieee80211_get_buffered_bc(hw, vif);
217 int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif)
219 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
223 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
226 avp = (void *)vif->drv_priv;
228 /* Allocate a beacon descriptor if we haven't done so. */
229 if (!avp->av_bcbuf) {
230 /* Allocate beacon state for hostap/ibss. We know
231 * a buffer is available. */
232 avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf,
233 struct ath_buf, list);
234 list_del(&avp->av_bcbuf->list);
236 if (ath9k_uses_beacons(vif->type)) {
239 * Assign the vif to a beacon xmit slot. As
240 * above, this cannot fail to find one.
243 for (slot = 0; slot < ATH_BCBUF; slot++)
244 if (sc->beacon.bslot[slot] == NULL) {
245 avp->av_bslot = slot;
246 avp->is_bslot_active = false;
248 /* NB: keep looking for a double slot */
249 if (slot == 0 || !sc->beacon.bslot[slot-1])
252 BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL);
253 sc->beacon.bslot[avp->av_bslot] = vif;
258 /* release the previous beacon frame, if it already exists. */
260 if (bf->bf_mpdu != NULL) {
262 dma_unmap_single(sc->dev, bf->bf_buf_addr,
263 skb->len, DMA_TO_DEVICE);
264 dev_kfree_skb_any(skb);
269 /* NB: the beacon data buffer must be 32-bit aligned. */
270 skb = ieee80211_beacon_get(sc->hw, vif);
274 tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
275 sc->beacon.bc_tstamp = (u32) le64_to_cpu(tstamp);
276 /* Calculate a TSF adjustment factor required for staggered beacons. */
277 if (avp->av_bslot > 0) {
281 intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
284 * Calculate the TSF offset for this beacon slot, i.e., the
285 * number of usecs that need to be added to the timestamp field
286 * in Beacon and Probe Response frames. Beacon slot 0 is
287 * processed at the correct offset, so it does not require TSF
288 * adjustment. Other slots are adjusted to get the timestamp
289 * close to the TBTT for the BSS.
291 tsfadjust = TU_TO_USEC(intval * avp->av_bslot) / ATH_BCBUF;
292 avp->tsf_adjust = cpu_to_le64(tsfadjust);
294 ath_dbg(common, ATH_DBG_BEACON,
295 "stagger beacons, bslot %d intval %u tsfadjust %llu\n",
296 avp->av_bslot, intval, (unsigned long long)tsfadjust);
298 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
301 avp->tsf_adjust = cpu_to_le64(0);
304 bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
305 skb->len, DMA_TO_DEVICE);
306 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
307 dev_kfree_skb_any(skb);
310 ath_err(common, "dma_mapping_error on beacon alloc\n");
313 avp->is_bslot_active = true;
318 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
320 if (avp->av_bcbuf != NULL) {
323 avp->is_bslot_active = false;
324 if (avp->av_bslot != -1) {
325 sc->beacon.bslot[avp->av_bslot] = NULL;
331 if (bf->bf_mpdu != NULL) {
332 struct sk_buff *skb = bf->bf_mpdu;
333 dma_unmap_single(sc->dev, bf->bf_buf_addr,
334 skb->len, DMA_TO_DEVICE);
335 dev_kfree_skb_any(skb);
339 list_add_tail(&bf->list, &sc->beacon.bbuf);
341 avp->av_bcbuf = NULL;
345 void ath_beacon_tasklet(unsigned long data)
347 struct ath_softc *sc = (struct ath_softc *)data;
348 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
349 struct ath_hw *ah = sc->sc_ah;
350 struct ath_common *common = ath9k_hw_common(ah);
351 struct ath_buf *bf = NULL;
352 struct ieee80211_vif *vif;
357 * Check if the previous beacon has gone out. If
358 * not don't try to post another, skip this period
359 * and wait for the next. Missed beacons indicate
360 * a problem and should not occur. If we miss too
361 * many consecutive beacons reset the device.
363 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
364 sc->beacon.bmisscnt++;
366 if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
367 ath_dbg(common, ATH_DBG_BSTUCK,
368 "missed %u consecutive beacons\n",
369 sc->beacon.bmisscnt);
370 ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
371 if (sc->beacon.bmisscnt > 3)
372 ath9k_hw_bstuck_nfcal(ah);
373 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
374 ath_dbg(common, ATH_DBG_BSTUCK,
375 "beacon is officially stuck\n");
376 sc->sc_flags |= SC_OP_TSF_RESET;
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.
390 if (ah->opmode == NL80211_IFTYPE_AP) {
395 intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
396 tsf = ath9k_hw_gettsf64(ah);
397 tsf += TU_TO_USEC(ah->config.sw_beacon_response_time);
398 tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
399 slot = (tsftu % (intval * ATH_BCBUF)) / intval;
400 vif = sc->beacon.bslot[slot];
402 ath_dbg(common, ATH_DBG_BEACON,
403 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
404 slot, tsf, tsftu / ATH_BCBUF, intval, vif);
407 vif = sc->beacon.bslot[slot];
413 bf = ath_beacon_generate(sc->hw, vif);
415 bfaddr = bf->bf_daddr;
419 if (sc->beacon.bmisscnt != 0) {
420 ath_dbg(common, ATH_DBG_BSTUCK,
421 "resume beacon xmit after %u misses\n",
422 sc->beacon.bmisscnt);
423 sc->beacon.bmisscnt = 0;
428 * Handle slot time change when a non-ERP station joins/leaves
429 * an 11g network. The 802.11 layer notifies us via callback,
430 * we mark updateslot, then wait one beacon before effecting
431 * the change. This gives associated stations at least one
432 * beacon interval to note the state change.
434 * NB: The slot time change state machine is clocked according
435 * to whether we are bursting or staggering beacons. We
436 * recognize the request to update and record the current
437 * slot then don't transition until that slot is reached
438 * again. If we miss a beacon for that slot then we'll be
439 * slow to transition but we'll be sure at least one beacon
440 * interval has passed. When bursting slot is always left
441 * set to ATH_BCBUF so this check is a noop.
443 if (sc->beacon.updateslot == UPDATE) {
444 sc->beacon.updateslot = COMMIT; /* commit next beacon */
445 sc->beacon.slotupdate = slot;
446 } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
447 ah->slottime = sc->beacon.slottime;
448 ath9k_hw_init_global_settings(ah);
449 sc->beacon.updateslot = OK;
452 /* NB: cabq traffic should already be queued and primed */
453 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
454 ath9k_hw_txstart(ah, sc->beacon.beaconq);
456 sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */
460 static void ath9k_beacon_init(struct ath_softc *sc,
464 if (sc->sc_flags & SC_OP_TSF_RESET) {
466 ath9k_hw_reset_tsf(sc->sc_ah);
469 ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period);
471 if (sc->sc_flags & SC_OP_TSF_RESET) {
472 ath9k_ps_restore(sc);
473 sc->sc_flags &= ~SC_OP_TSF_RESET;
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 = TU_TO_USEC(conf->beacon_interval & ATH9K_BEACON_PERIOD);
490 intval /= ATH_BCBUF; /* for staggered beacons */
494 * In AP mode we enable the beacon timers and SWBA interrupts to
495 * prepare beacon frames.
497 ah->imask |= ATH9K_INT_SWBA;
498 ath_beaconq_config(sc);
500 /* Set the computed AP beacon timers */
502 ath9k_hw_disable_interrupts(ah);
503 ath9k_beacon_init(sc, nexttbtt, intval);
504 sc->beacon.bmisscnt = 0;
505 ath9k_hw_set_interrupts(ah, ah->imask);
509 * This sets up the beacon timers according to the timestamp of the last
510 * received beacon and the current TSF, configures PCF and DTIM
511 * handling, programs the sleep registers so the hardware will wakeup in
512 * time to receive beacons, and configures the beacon miss handling so
513 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
514 * we've associated with.
516 static void ath_beacon_config_sta(struct ath_softc *sc,
517 struct ath_beacon_config *conf)
519 struct ath_hw *ah = sc->sc_ah;
520 struct ath_common *common = ath9k_hw_common(ah);
521 struct ath9k_beacon_state bs;
522 int dtimperiod, dtimcount, sleepduration;
523 int cfpperiod, cfpcount;
524 u32 nexttbtt = 0, intval, tsftu;
526 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
528 /* No need to configure beacon if we are not associated */
529 if (!common->curaid) {
530 ath_dbg(common, ATH_DBG_BEACON,
531 "STA is not yet associated..skipping beacon config\n");
535 memset(&bs, 0, sizeof(bs));
536 intval = conf->beacon_interval & ATH9K_BEACON_PERIOD;
539 * Setup dtim and cfp parameters according to
540 * last beacon we received (which may be none).
542 dtimperiod = conf->dtim_period;
543 dtimcount = conf->dtim_count;
544 if (dtimcount >= dtimperiod) /* NB: sanity check */
546 cfpperiod = 1; /* NB: no PCF support yet */
549 sleepduration = conf->listen_interval * intval;
552 * Pull nexttbtt forward to reflect the current
553 * TSF and calculate dtim+cfp state for the result.
555 tsf = ath9k_hw_gettsf64(ah);
556 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
558 num_beacons = tsftu / intval + 1;
559 offset = tsftu % intval;
560 nexttbtt = tsftu - offset;
564 /* DTIM Beacon every dtimperiod Beacon */
565 dtim_dec_count = num_beacons % dtimperiod;
566 /* CFP every cfpperiod DTIM Beacon */
567 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
571 dtimcount -= dtim_dec_count;
573 dtimcount += dtimperiod;
575 cfpcount -= cfp_dec_count;
577 cfpcount += cfpperiod;
579 bs.bs_intval = intval;
580 bs.bs_nexttbtt = nexttbtt;
581 bs.bs_dtimperiod = dtimperiod*intval;
582 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
583 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
584 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
585 bs.bs_cfpmaxduration = 0;
588 * Calculate the number of consecutive beacons to miss* before taking
589 * a BMISS interrupt. The configuration is specified in TU so we only
590 * need calculate based on the beacon interval. Note that we clamp the
591 * result to at most 15 beacons.
593 if (sleepduration > intval) {
594 bs.bs_bmissthreshold = conf->listen_interval *
595 ATH_DEFAULT_BMISS_LIMIT / 2;
597 bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval);
598 if (bs.bs_bmissthreshold > 15)
599 bs.bs_bmissthreshold = 15;
600 else if (bs.bs_bmissthreshold <= 0)
601 bs.bs_bmissthreshold = 1;
605 * Calculate sleep duration. The configuration is given in ms.
606 * We ensure a multiple of the beacon period is used. Also, if the sleep
607 * duration is greater than the DTIM period then it makes senses
608 * to make it a multiple of that.
613 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
614 if (bs.bs_sleepduration > bs.bs_dtimperiod)
615 bs.bs_sleepduration = bs.bs_dtimperiod;
617 /* TSF out of range threshold fixed at 1 second */
618 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
620 ath_dbg(common, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
621 ath_dbg(common, ATH_DBG_BEACON,
622 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
623 bs.bs_bmissthreshold, bs.bs_sleepduration,
624 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
626 /* Set the computed STA beacon timers */
628 ath9k_hw_disable_interrupts(ah);
629 ath9k_hw_set_sta_beacon_timers(ah, &bs);
630 ah->imask |= ATH9K_INT_BMISS;
633 * If the beacon config is called beacause of TSFOOR,
634 * Interrupts will be enabled back at the end of ath9k_tasklet
636 if (!(sc->ps_flags & PS_TSFOOR_SYNC))
637 ath9k_hw_set_interrupts(ah, ah->imask);
640 static void ath_beacon_config_adhoc(struct ath_softc *sc,
641 struct ath_beacon_config *conf)
643 struct ath_hw *ah = sc->sc_ah;
644 struct ath_common *common = ath9k_hw_common(ah);
645 u32 tsf, delta, intval, nexttbtt;
647 tsf = ath9k_hw_gettsf32(ah) + TU_TO_USEC(FUDGE);
648 intval = TU_TO_USEC(conf->beacon_interval & ATH9K_BEACON_PERIOD);
650 if (!sc->beacon.bc_tstamp)
651 nexttbtt = tsf + intval;
653 if (tsf > sc->beacon.bc_tstamp)
654 delta = (tsf - sc->beacon.bc_tstamp);
656 delta = (tsf + 1 + (~0U - sc->beacon.bc_tstamp));
657 nexttbtt = tsf + roundup(delta, intval);
660 ath_dbg(common, ATH_DBG_BEACON,
661 "IBSS nexttbtt %u intval %u (%u)\n",
662 nexttbtt, intval, conf->beacon_interval);
665 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
666 * if we need to manually prepare beacon frames. Otherwise we use a
667 * self-linked tx descriptor and let the hardware deal with things.
669 ah->imask |= ATH9K_INT_SWBA;
671 ath_beaconq_config(sc);
673 /* Set the computed ADHOC beacon timers */
675 ath9k_hw_disable_interrupts(ah);
676 ath9k_beacon_init(sc, nexttbtt, intval);
677 sc->beacon.bmisscnt = 0;
679 * If the beacon config is called beacause of TSFOOR,
680 * Interrupts will be enabled back at the end of ath9k_tasklet
682 if (!(sc->ps_flags & PS_TSFOOR_SYNC))
683 ath9k_hw_set_interrupts(ah, ah->imask);
686 static bool ath9k_allow_beacon_config(struct ath_softc *sc,
687 struct ieee80211_vif *vif)
689 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
690 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
691 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
692 struct ath_vif *avp = (void *)vif->drv_priv;
695 * Can not have different beacon interval on multiple
698 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
699 (sc->nbcnvifs > 1) &&
700 (vif->type == NL80211_IFTYPE_AP) &&
701 (cur_conf->beacon_interval != bss_conf->beacon_int)) {
702 ath_dbg(common, ATH_DBG_CONFIG,
703 "Changing beacon interval of multiple \
708 * Can not configure station vif's beacon config
711 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
712 (vif->type != NL80211_IFTYPE_AP)) {
713 ath_dbg(common, ATH_DBG_CONFIG,
714 "STA vif's beacon not allowed on AP mode\n");
718 * Do not allow beacon config if HW was already configured
719 * with another STA vif
721 if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) &&
722 (vif->type == NL80211_IFTYPE_STATION) &&
723 (sc->sc_flags & SC_OP_BEACONS) &&
724 !avp->primary_sta_vif) {
725 ath_dbg(common, ATH_DBG_CONFIG,
726 "Beacon already configured for a station interface\n");
732 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
734 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
735 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
737 if (!ath9k_allow_beacon_config(sc, vif))
740 /* Setup the beacon configuration parameters */
741 cur_conf->beacon_interval = bss_conf->beacon_int;
742 cur_conf->dtim_period = bss_conf->dtim_period;
743 cur_conf->listen_interval = 1;
744 cur_conf->dtim_count = 1;
745 cur_conf->bmiss_timeout =
746 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
749 * It looks like mac80211 may end up using beacon interval of zero in
750 * some cases (at least for mesh point). Avoid getting into an
751 * infinite loop by using a bit safer value instead. To be safe,
752 * do sanity check on beacon interval for all operating modes.
754 if (cur_conf->beacon_interval == 0)
755 cur_conf->beacon_interval = 100;
758 * We don't parse dtim period from mac80211 during the driver
759 * initialization as it breaks association with hidden-ssid
760 * AP and it causes latency in roaming
762 if (cur_conf->dtim_period == 0)
763 cur_conf->dtim_period = 1;
768 static bool ath_has_valid_bslot(struct ath_softc *sc)
774 for (slot = 0; slot < ATH_BCBUF; slot++) {
775 if (sc->beacon.bslot[slot]) {
776 avp = (void *)sc->beacon.bslot[slot]->drv_priv;
777 if (avp->is_bslot_active) {
787 void ath_set_beacon(struct ath_softc *sc)
789 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
790 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
792 switch (sc->sc_ah->opmode) {
793 case NL80211_IFTYPE_AP:
794 if (ath_has_valid_bslot(sc))
795 ath_beacon_config_ap(sc, cur_conf);
797 case NL80211_IFTYPE_ADHOC:
798 case NL80211_IFTYPE_MESH_POINT:
799 ath_beacon_config_adhoc(sc, cur_conf);
801 case NL80211_IFTYPE_STATION:
802 ath_beacon_config_sta(sc, cur_conf);
805 ath_dbg(common, ATH_DBG_CONFIG,
806 "Unsupported beaconing mode\n");
810 sc->sc_flags |= SC_OP_BEACONS;
813 void ath9k_set_beaconing_status(struct ath_softc *sc, bool status)
815 struct ath_hw *ah = sc->sc_ah;
817 if (!ath_has_valid_bslot(sc))
822 /* Re-enable beaconing */
823 ah->imask |= ATH9K_INT_SWBA;
824 ath9k_hw_set_interrupts(ah, ah->imask);
826 /* Disable SWBA interrupt */
827 ah->imask &= ~ATH9K_INT_SWBA;
828 ath9k_hw_set_interrupts(ah, ah->imask);
829 tasklet_kill(&sc->bcon_tasklet);
830 ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
832 ath9k_ps_restore(sc);