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.
17 #include <linux/dma-mapping.h>
22 static void ath9k_reset_beacon_status(struct ath_softc *sc)
24 sc->beacon.tx_processed = false;
25 sc->beacon.tx_last = false;
29 * This function will modify certain transmit queue properties depending on
30 * the operating mode of the station (AP or AdHoc). Parameters are AIFS
31 * settings and channel width min/max
33 int ath_beaconq_config(struct ath_softc *sc)
35 struct ath_hw *ah = sc->sc_ah;
36 struct ath_common *common = ath9k_hw_common(ah);
37 struct ath9k_tx_queue_info qi, qi_be;
40 ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
41 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
42 /* Always burst out beacon and CAB traffic. */
47 /* Adhoc mode; important thing is to use 2x cwmin. */
48 txq = sc->tx.txq_map[WME_AC_BE];
49 ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be);
50 qi.tqi_aifs = qi_be.tqi_aifs;
51 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
52 qi.tqi_cwmax = qi_be.tqi_cwmax;
55 if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
57 "Unable to update h/w beacon queue parameters\n");
60 ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
66 * Associates the beacon frame buffer with a transmit descriptor. Will set
67 * up rate codes, and channel flags. Beacons are always sent out at the
68 * lowest rate, and are not retried.
70 static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
71 struct ath_buf *bf, int rateidx)
73 struct sk_buff *skb = bf->bf_mpdu;
74 struct ath_hw *ah = sc->sc_ah;
75 struct ath_common *common = ath9k_hw_common(ah);
77 struct ath9k_11n_rate_series series[4];
78 int flags, ctsrate = 0, ctsduration = 0;
79 struct ieee80211_supported_band *sband;
82 ath9k_reset_beacon_status(sc);
85 flags = ATH9K_TXDESC_NOACK;
89 sband = &sc->sbands[common->hw->conf.channel->band];
90 rate = sband->bitrates[rateidx].hw_value;
91 if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
92 rate |= sband->bitrates[rateidx].hw_value_short;
94 ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
95 ATH9K_PKT_TYPE_BEACON,
97 ATH9K_TXKEYIX_INVALID,
101 /* NB: beacon's BufLen must be a multiple of 4 bytes */
102 ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
103 true, true, ds, bf->bf_buf_addr,
106 memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
108 series[0].Rate = rate;
109 series[0].ChSel = ath_txchainmask_reduction(sc,
110 ah->txchainmask, series[0].Rate);
111 series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
112 ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
114 ath9k_hw_set_desc_link(ah, ds, 0);
117 static void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
119 struct ath_softc *sc = hw->priv;
120 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
121 struct ath_tx_control txctl;
123 memset(&txctl, 0, sizeof(struct ath_tx_control));
124 txctl.txq = sc->beacon.cabq;
126 ath_dbg(common, ATH_DBG_XMIT,
127 "transmitting CABQ packet, skb: %p\n", skb);
129 if (ath_tx_start(hw, skb, &txctl) != 0) {
130 ath_dbg(common, ATH_DBG_XMIT, "CABQ TX failed\n");
131 dev_kfree_skb_any(skb);
135 static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
136 struct ieee80211_vif *vif)
138 struct ath_softc *sc = hw->priv;
139 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
143 struct ath_txq *cabq;
144 struct ieee80211_tx_info *info;
147 ath9k_reset_beacon_status(sc);
149 avp = (void *)vif->drv_priv;
150 cabq = sc->beacon.cabq;
152 if ((avp->av_bcbuf == NULL) || !avp->is_bslot_active)
155 /* Release the old beacon first */
160 dma_unmap_single(sc->dev, bf->bf_buf_addr,
161 skb->len, DMA_TO_DEVICE);
162 dev_kfree_skb_any(skb);
166 /* Get a new beacon from mac80211 */
168 skb = ieee80211_beacon_get(hw, vif);
172 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
175 info = IEEE80211_SKB_CB(skb);
176 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
178 * TODO: make sure the seq# gets assigned properly (vs. other
181 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
182 sc->tx.seq_no += 0x10;
183 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
184 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
187 bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
188 skb->len, DMA_TO_DEVICE);
189 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
190 dev_kfree_skb_any(skb);
193 ath_err(common, "dma_mapping_error on beaconing\n");
197 skb = ieee80211_get_buffered_bc(hw, vif);
200 * if the CABQ traffic from previous DTIM is pending and the current
201 * beacon is also a DTIM.
202 * 1) if there is only one vif let the cab traffic continue.
203 * 2) if there are more than one vif and we are using staggered
204 * beacons, then drain the cabq by dropping all the frames in
205 * the cabq so that the current vifs cab traffic can be scheduled.
207 spin_lock_bh(&cabq->axq_lock);
208 cabq_depth = cabq->axq_depth;
209 spin_unlock_bh(&cabq->axq_lock);
211 if (skb && cabq_depth) {
213 ath_dbg(common, ATH_DBG_BEACON,
214 "Flushing previous cabq traffic\n");
215 ath_draintxq(sc, cabq, false);
219 ath_beacon_setup(sc, avp, bf, info->control.rates[0].idx);
222 ath_tx_cabq(hw, skb);
223 skb = ieee80211_get_buffered_bc(hw, vif);
229 int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif)
231 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
235 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
238 avp = (void *)vif->drv_priv;
240 /* Allocate a beacon descriptor if we haven't done so. */
241 if (!avp->av_bcbuf) {
242 /* Allocate beacon state for hostap/ibss. We know
243 * a buffer is available. */
244 avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf,
245 struct ath_buf, list);
246 list_del(&avp->av_bcbuf->list);
248 if (ath9k_uses_beacons(vif->type)) {
251 * Assign the vif to a beacon xmit slot. As
252 * above, this cannot fail to find one.
255 for (slot = 0; slot < ATH_BCBUF; slot++)
256 if (sc->beacon.bslot[slot] == NULL) {
257 avp->av_bslot = slot;
258 avp->is_bslot_active = false;
260 /* NB: keep looking for a double slot */
261 if (slot == 0 || !sc->beacon.bslot[slot-1])
264 BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL);
265 sc->beacon.bslot[avp->av_bslot] = vif;
270 /* release the previous beacon frame, if it already exists. */
272 if (bf->bf_mpdu != NULL) {
274 dma_unmap_single(sc->dev, bf->bf_buf_addr,
275 skb->len, DMA_TO_DEVICE);
276 dev_kfree_skb_any(skb);
281 /* NB: the beacon data buffer must be 32-bit aligned. */
282 skb = ieee80211_beacon_get(sc->hw, vif);
286 tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
287 sc->beacon.bc_tstamp = (u32) le64_to_cpu(tstamp);
288 /* Calculate a TSF adjustment factor required for staggered beacons. */
289 if (avp->av_bslot > 0) {
293 intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
296 * Calculate the TSF offset for this beacon slot, i.e., the
297 * number of usecs that need to be added to the timestamp field
298 * in Beacon and Probe Response frames. Beacon slot 0 is
299 * processed at the correct offset, so it does not require TSF
300 * adjustment. Other slots are adjusted to get the timestamp
301 * close to the TBTT for the BSS.
303 tsfadjust = TU_TO_USEC(intval * avp->av_bslot) / ATH_BCBUF;
304 avp->tsf_adjust = cpu_to_le64(tsfadjust);
306 ath_dbg(common, ATH_DBG_BEACON,
307 "stagger beacons, bslot %d intval %u tsfadjust %llu\n",
308 avp->av_bslot, intval, (unsigned long long)tsfadjust);
310 ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
313 avp->tsf_adjust = cpu_to_le64(0);
316 bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
317 skb->len, DMA_TO_DEVICE);
318 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
319 dev_kfree_skb_any(skb);
322 ath_err(common, "dma_mapping_error on beacon alloc\n");
325 avp->is_bslot_active = true;
330 void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
332 if (avp->av_bcbuf != NULL) {
335 avp->is_bslot_active = false;
336 if (avp->av_bslot != -1) {
337 sc->beacon.bslot[avp->av_bslot] = NULL;
343 if (bf->bf_mpdu != NULL) {
344 struct sk_buff *skb = bf->bf_mpdu;
345 dma_unmap_single(sc->dev, bf->bf_buf_addr,
346 skb->len, DMA_TO_DEVICE);
347 dev_kfree_skb_any(skb);
351 list_add_tail(&bf->list, &sc->beacon.bbuf);
353 avp->av_bcbuf = NULL;
357 void ath_beacon_tasklet(unsigned long data)
359 struct ath_softc *sc = (struct ath_softc *)data;
360 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
361 struct ath_hw *ah = sc->sc_ah;
362 struct ath_common *common = ath9k_hw_common(ah);
363 struct ath_buf *bf = NULL;
364 struct ieee80211_vif *vif;
365 struct ath_tx_status ts;
370 * Check if the previous beacon has gone out. If
371 * not don't try to post another, skip this period
372 * and wait for the next. Missed beacons indicate
373 * a problem and should not occur. If we miss too
374 * many consecutive beacons reset the device.
376 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
377 sc->beacon.bmisscnt++;
379 if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
380 ath_dbg(common, ATH_DBG_BSTUCK,
381 "missed %u consecutive beacons\n",
382 sc->beacon.bmisscnt);
383 ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
384 if (sc->beacon.bmisscnt > 3)
385 ath9k_hw_bstuck_nfcal(ah);
386 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
387 ath_dbg(common, ATH_DBG_BSTUCK,
388 "beacon is officially stuck\n");
389 sc->sc_flags |= SC_OP_TSF_RESET;
390 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
397 * Generate beacon frames. we are sending frames
398 * staggered so calculate the slot for this frame based
399 * on the tsf to safeguard against missing an swba.
403 if (ah->opmode == NL80211_IFTYPE_AP) {
408 intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
409 tsf = ath9k_hw_gettsf64(ah);
410 tsf += TU_TO_USEC(ah->config.sw_beacon_response_time);
411 tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
412 slot = (tsftu % (intval * ATH_BCBUF)) / intval;
413 vif = sc->beacon.bslot[slot];
415 ath_dbg(common, ATH_DBG_BEACON,
416 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
417 slot, tsf, tsftu / ATH_BCBUF, intval, vif);
420 vif = sc->beacon.bslot[slot];
426 bf = ath_beacon_generate(sc->hw, vif);
428 bfaddr = bf->bf_daddr;
432 if (sc->beacon.bmisscnt != 0) {
433 ath_dbg(common, ATH_DBG_BSTUCK,
434 "resume beacon xmit after %u misses\n",
435 sc->beacon.bmisscnt);
436 sc->beacon.bmisscnt = 0;
441 * Handle slot time change when a non-ERP station joins/leaves
442 * an 11g network. The 802.11 layer notifies us via callback,
443 * we mark updateslot, then wait one beacon before effecting
444 * the change. This gives associated stations at least one
445 * beacon interval to note the state change.
447 * NB: The slot time change state machine is clocked according
448 * to whether we are bursting or staggering beacons. We
449 * recognize the request to update and record the current
450 * slot then don't transition until that slot is reached
451 * again. If we miss a beacon for that slot then we'll be
452 * slow to transition but we'll be sure at least one beacon
453 * interval has passed. When bursting slot is always left
454 * set to ATH_BCBUF so this check is a noop.
456 if (sc->beacon.updateslot == UPDATE) {
457 sc->beacon.updateslot = COMMIT; /* commit next beacon */
458 sc->beacon.slotupdate = slot;
459 } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) {
460 ah->slottime = sc->beacon.slottime;
461 ath9k_hw_init_global_settings(ah);
462 sc->beacon.updateslot = OK;
465 /* NB: cabq traffic should already be queued and primed */
466 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr);
467 ath9k_hw_txstart(ah, sc->beacon.beaconq);
469 sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */
470 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
471 spin_lock_bh(&sc->sc_pcu_lock);
472 ath9k_hw_txprocdesc(ah, bf->bf_desc, (void *)&ts);
473 spin_unlock_bh(&sc->sc_pcu_lock);
478 static void ath9k_beacon_init(struct ath_softc *sc,
482 if (sc->sc_flags & SC_OP_TSF_RESET) {
484 ath9k_hw_reset_tsf(sc->sc_ah);
487 ath9k_hw_beaconinit(sc->sc_ah, next_beacon, beacon_period);
489 if (sc->sc_flags & SC_OP_TSF_RESET) {
490 ath9k_ps_restore(sc);
491 sc->sc_flags &= ~SC_OP_TSF_RESET;
496 * For multi-bss ap support beacons are either staggered evenly over N slots or
497 * burst together. For the former arrange for the SWBA to be delivered for each
498 * slot. Slots that are not occupied will generate nothing.
500 static void ath_beacon_config_ap(struct ath_softc *sc,
501 struct ath_beacon_config *conf)
503 struct ath_hw *ah = sc->sc_ah;
504 u32 nexttbtt, intval;
506 /* NB: the beacon interval is kept internally in TU's */
507 intval = TU_TO_USEC(conf->beacon_interval);
508 intval /= ATH_BCBUF; /* for staggered beacons */
512 * In AP mode we enable the beacon timers and SWBA interrupts to
513 * prepare beacon frames.
515 ah->imask |= ATH9K_INT_SWBA;
516 ath_beaconq_config(sc);
518 /* Set the computed AP beacon timers */
520 ath9k_hw_disable_interrupts(ah);
521 sc->sc_flags |= SC_OP_TSF_RESET;
522 ath9k_beacon_init(sc, nexttbtt, intval);
523 sc->beacon.bmisscnt = 0;
524 ath9k_hw_set_interrupts(ah, ah->imask);
525 ath9k_hw_enable_interrupts(ah);
529 * This sets up the beacon timers according to the timestamp of the last
530 * received beacon and the current TSF, configures PCF and DTIM
531 * handling, programs the sleep registers so the hardware will wakeup in
532 * time to receive beacons, and configures the beacon miss handling so
533 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
534 * we've associated with.
536 static void ath_beacon_config_sta(struct ath_softc *sc,
537 struct ath_beacon_config *conf)
539 struct ath_hw *ah = sc->sc_ah;
540 struct ath_common *common = ath9k_hw_common(ah);
541 struct ath9k_beacon_state bs;
542 int dtimperiod, dtimcount, sleepduration;
543 int cfpperiod, cfpcount;
544 u32 nexttbtt = 0, intval, tsftu;
546 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
548 /* No need to configure beacon if we are not associated */
549 if (!common->curaid) {
550 ath_dbg(common, ATH_DBG_BEACON,
551 "STA is not yet associated..skipping beacon config\n");
555 memset(&bs, 0, sizeof(bs));
556 intval = conf->beacon_interval;
559 * Setup dtim and cfp parameters according to
560 * last beacon we received (which may be none).
562 dtimperiod = conf->dtim_period;
563 dtimcount = conf->dtim_count;
564 if (dtimcount >= dtimperiod) /* NB: sanity check */
566 cfpperiod = 1; /* NB: no PCF support yet */
569 sleepduration = conf->listen_interval * intval;
572 * Pull nexttbtt forward to reflect the current
573 * TSF and calculate dtim+cfp state for the result.
575 tsf = ath9k_hw_gettsf64(ah);
576 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
578 num_beacons = tsftu / intval + 1;
579 offset = tsftu % intval;
580 nexttbtt = tsftu - offset;
584 /* DTIM Beacon every dtimperiod Beacon */
585 dtim_dec_count = num_beacons % dtimperiod;
586 /* CFP every cfpperiod DTIM Beacon */
587 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
591 dtimcount -= dtim_dec_count;
593 dtimcount += dtimperiod;
595 cfpcount -= cfp_dec_count;
597 cfpcount += cfpperiod;
599 bs.bs_intval = intval;
600 bs.bs_nexttbtt = nexttbtt;
601 bs.bs_dtimperiod = dtimperiod*intval;
602 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
603 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
604 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
605 bs.bs_cfpmaxduration = 0;
608 * Calculate the number of consecutive beacons to miss* before taking
609 * a BMISS interrupt. The configuration is specified in TU so we only
610 * need calculate based on the beacon interval. Note that we clamp the
611 * result to at most 15 beacons.
613 if (sleepduration > intval) {
614 bs.bs_bmissthreshold = conf->listen_interval *
615 ATH_DEFAULT_BMISS_LIMIT / 2;
617 bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval);
618 if (bs.bs_bmissthreshold > 15)
619 bs.bs_bmissthreshold = 15;
620 else if (bs.bs_bmissthreshold <= 0)
621 bs.bs_bmissthreshold = 1;
625 * Calculate sleep duration. The configuration is given in ms.
626 * We ensure a multiple of the beacon period is used. Also, if the sleep
627 * duration is greater than the DTIM period then it makes senses
628 * to make it a multiple of that.
633 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
634 if (bs.bs_sleepduration > bs.bs_dtimperiod)
635 bs.bs_sleepduration = bs.bs_dtimperiod;
637 /* TSF out of range threshold fixed at 1 second */
638 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
640 ath_dbg(common, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
641 ath_dbg(common, ATH_DBG_BEACON,
642 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
643 bs.bs_bmissthreshold, bs.bs_sleepduration,
644 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
646 /* Set the computed STA beacon timers */
648 ath9k_hw_disable_interrupts(ah);
649 ath9k_hw_set_sta_beacon_timers(ah, &bs);
650 ah->imask |= ATH9K_INT_BMISS;
652 ath9k_hw_set_interrupts(ah, ah->imask);
653 ath9k_hw_enable_interrupts(ah);
656 static void ath_beacon_config_adhoc(struct ath_softc *sc,
657 struct ath_beacon_config *conf)
659 struct ath_hw *ah = sc->sc_ah;
660 struct ath_common *common = ath9k_hw_common(ah);
661 u32 tsf, intval, nexttbtt;
663 ath9k_reset_beacon_status(sc);
665 intval = TU_TO_USEC(conf->beacon_interval);
666 tsf = roundup(ath9k_hw_gettsf32(ah) + TU_TO_USEC(FUDGE), intval);
667 nexttbtt = tsf + intval;
669 ath_dbg(common, ATH_DBG_BEACON,
670 "IBSS nexttbtt %u intval %u (%u)\n",
671 nexttbtt, intval, conf->beacon_interval);
674 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
675 * if we need to manually prepare beacon frames. Otherwise we use a
676 * self-linked tx descriptor and let the hardware deal with things.
678 ah->imask |= ATH9K_INT_SWBA;
680 ath_beaconq_config(sc);
682 /* Set the computed ADHOC beacon timers */
684 ath9k_hw_disable_interrupts(ah);
685 ath9k_beacon_init(sc, nexttbtt, intval);
686 sc->beacon.bmisscnt = 0;
688 ath9k_hw_set_interrupts(ah, ah->imask);
689 ath9k_hw_enable_interrupts(ah);
692 static bool ath9k_allow_beacon_config(struct ath_softc *sc,
693 struct ieee80211_vif *vif)
695 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
696 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
697 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
698 struct ath_vif *avp = (void *)vif->drv_priv;
701 * Can not have different beacon interval on multiple
704 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
705 (sc->nbcnvifs > 1) &&
706 (vif->type == NL80211_IFTYPE_AP) &&
707 (cur_conf->beacon_interval != bss_conf->beacon_int)) {
708 ath_dbg(common, ATH_DBG_CONFIG,
709 "Changing beacon interval of multiple \
714 * Can not configure station vif's beacon config
717 if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) &&
718 (vif->type != NL80211_IFTYPE_AP)) {
719 ath_dbg(common, ATH_DBG_CONFIG,
720 "STA vif's beacon not allowed on AP mode\n");
724 * Do not allow beacon config if HW was already configured
725 * with another STA vif
727 if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) &&
728 (vif->type == NL80211_IFTYPE_STATION) &&
729 (sc->sc_flags & SC_OP_BEACONS) &&
730 !avp->primary_sta_vif) {
731 ath_dbg(common, ATH_DBG_CONFIG,
732 "Beacon already configured for a station interface\n");
738 void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
740 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
741 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
743 if (!ath9k_allow_beacon_config(sc, vif))
746 /* Setup the beacon configuration parameters */
747 cur_conf->beacon_interval = bss_conf->beacon_int;
748 cur_conf->dtim_period = bss_conf->dtim_period;
749 cur_conf->listen_interval = 1;
750 cur_conf->dtim_count = 1;
751 cur_conf->bmiss_timeout =
752 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
755 * It looks like mac80211 may end up using beacon interval of zero in
756 * some cases (at least for mesh point). Avoid getting into an
757 * infinite loop by using a bit safer value instead. To be safe,
758 * do sanity check on beacon interval for all operating modes.
760 if (cur_conf->beacon_interval == 0)
761 cur_conf->beacon_interval = 100;
764 * We don't parse dtim period from mac80211 during the driver
765 * initialization as it breaks association with hidden-ssid
766 * AP and it causes latency in roaming
768 if (cur_conf->dtim_period == 0)
769 cur_conf->dtim_period = 1;
774 static bool ath_has_valid_bslot(struct ath_softc *sc)
780 for (slot = 0; slot < ATH_BCBUF; slot++) {
781 if (sc->beacon.bslot[slot]) {
782 avp = (void *)sc->beacon.bslot[slot]->drv_priv;
783 if (avp->is_bslot_active) {
793 void ath_set_beacon(struct ath_softc *sc)
795 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
796 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
798 switch (sc->sc_ah->opmode) {
799 case NL80211_IFTYPE_AP:
800 if (ath_has_valid_bslot(sc))
801 ath_beacon_config_ap(sc, cur_conf);
803 case NL80211_IFTYPE_ADHOC:
804 case NL80211_IFTYPE_MESH_POINT:
805 ath_beacon_config_adhoc(sc, cur_conf);
807 case NL80211_IFTYPE_STATION:
808 ath_beacon_config_sta(sc, cur_conf);
811 ath_dbg(common, ATH_DBG_CONFIG,
812 "Unsupported beaconing mode\n");
816 sc->sc_flags |= SC_OP_BEACONS;
819 void ath9k_set_beaconing_status(struct ath_softc *sc, bool status)
821 struct ath_hw *ah = sc->sc_ah;
823 if (!ath_has_valid_bslot(sc))
828 /* Re-enable beaconing */
829 ah->imask |= ATH9K_INT_SWBA;
830 ath9k_hw_set_interrupts(ah, ah->imask);
832 /* Disable SWBA interrupt */
833 ah->imask &= ~ATH9K_INT_SWBA;
834 ath9k_hw_set_interrupts(ah, ah->imask);
835 tasklet_kill(&sc->bcon_tasklet);
836 ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
838 ath9k_ps_restore(sc);