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 static void ath9k_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);
42 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
43 /* Always burst out beacon and CAB traffic. */
48 /* Adhoc mode; important thing is to use 2x cwmin. */
49 txq = sc->tx.txq_map[IEEE80211_AC_BE];
50 ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be);
51 qi.tqi_aifs = qi_be.tqi_aifs;
52 if (ah->slottime == ATH9K_SLOT_TIME_20)
53 qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
55 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
56 qi.tqi_cwmax = qi_be.tqi_cwmax;
59 if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
60 ath_err(common, "Unable to update h/w beacon queue parameters\n");
62 ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
67 * Associates the beacon frame buffer with a transmit descriptor. Will set
68 * up rate codes, and channel flags. Beacons are always sent out at the
69 * lowest rate, and are not retried.
71 static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
72 struct ath_buf *bf, int rateidx)
74 struct sk_buff *skb = bf->bf_mpdu;
75 struct ath_hw *ah = sc->sc_ah;
76 struct ath_common *common = ath9k_hw_common(ah);
77 struct ath_tx_info info;
78 struct ieee80211_supported_band *sband;
79 u8 chainmask = ah->txchainmask;
82 sband = &sc->sbands[common->hw->conf.channel->band];
83 rate = sband->bitrates[rateidx].hw_value;
84 if (vif->bss_conf.use_short_preamble)
85 rate |= sband->bitrates[rateidx].hw_value_short;
87 memset(&info, 0, sizeof(info));
88 info.pkt_len = skb->len + FCS_LEN;
89 info.type = ATH9K_PKT_TYPE_BEACON;
90 info.txpower = MAX_RATE_POWER;
91 info.keyix = ATH9K_TXKEYIX_INVALID;
92 info.keytype = ATH9K_KEY_TYPE_CLEAR;
93 info.flags = ATH9K_TXDESC_NOACK | ATH9K_TXDESC_CLRDMASK;
95 info.buf_addr[0] = bf->bf_buf_addr;
96 info.buf_len[0] = roundup(skb->len, 4);
101 info.qcu = sc->beacon.beaconq;
103 info.rates[0].Tries = 1;
104 info.rates[0].Rate = rate;
105 info.rates[0].ChSel = ath_txchainmask_reduction(sc, chainmask, rate);
107 ath9k_hw_set_txdesc(ah, bf->bf_desc, &info);
110 static void ath9k_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb)
112 struct ath_softc *sc = hw->priv;
113 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
114 struct ath_tx_control txctl;
116 memset(&txctl, 0, sizeof(struct ath_tx_control));
117 txctl.txq = sc->beacon.cabq;
119 ath_dbg(common, XMIT, "transmitting CABQ packet, skb: %p\n", skb);
121 if (ath_tx_start(hw, skb, &txctl) != 0) {
122 ath_dbg(common, XMIT, "CABQ TX failed\n");
123 ieee80211_free_txskb(hw, skb);
127 static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,
128 struct ieee80211_vif *vif)
130 struct ath_softc *sc = hw->priv;
131 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
133 struct ath_vif *avp = (void *)vif->drv_priv;
135 struct ath_txq *cabq = sc->beacon.cabq;
136 struct ieee80211_tx_info *info;
137 struct ieee80211_mgmt *mgmt_hdr;
140 if (avp->av_bcbuf == NULL)
146 dma_unmap_single(sc->dev, bf->bf_buf_addr,
147 skb->len, DMA_TO_DEVICE);
148 dev_kfree_skb_any(skb);
153 skb = ieee80211_beacon_get(hw, vif);
159 mgmt_hdr = (struct ieee80211_mgmt *)skb->data;
160 mgmt_hdr->u.beacon.timestamp = avp->tsf_adjust;
162 info = IEEE80211_SKB_CB(skb);
163 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
165 * TODO: make sure the seq# gets assigned properly (vs. other
168 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
169 sc->tx.seq_no += 0x10;
170 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
171 hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
174 bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
175 skb->len, DMA_TO_DEVICE);
176 if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
177 dev_kfree_skb_any(skb);
180 ath_err(common, "dma_mapping_error on beaconing\n");
184 skb = ieee80211_get_buffered_bc(hw, vif);
187 * if the CABQ traffic from previous DTIM is pending and the current
188 * beacon is also a DTIM.
189 * 1) if there is only one vif let the cab traffic continue.
190 * 2) if there are more than one vif and we are using staggered
191 * beacons, then drain the cabq by dropping all the frames in
192 * the cabq so that the current vifs cab traffic can be scheduled.
194 spin_lock_bh(&cabq->axq_lock);
195 cabq_depth = cabq->axq_depth;
196 spin_unlock_bh(&cabq->axq_lock);
198 if (skb && cabq_depth) {
200 ath_dbg(common, BEACON,
201 "Flushing previous cabq traffic\n");
202 ath_draintxq(sc, cabq);
206 ath9k_beacon_setup(sc, vif, bf, info->control.rates[0].idx);
209 ath9k_tx_cabq(hw, skb);
210 skb = ieee80211_get_buffered_bc(hw, vif);
216 void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
218 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
219 struct ath_vif *avp = (void *)vif->drv_priv;
222 avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, struct ath_buf, list);
223 list_del(&avp->av_bcbuf->list);
225 for (slot = 0; slot < ATH_BCBUF; slot++) {
226 if (sc->beacon.bslot[slot] == NULL) {
227 avp->av_bslot = slot;
232 sc->beacon.bslot[avp->av_bslot] = vif;
235 ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
239 void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
241 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
242 struct ath_vif *avp = (void *)vif->drv_priv;
243 struct ath_buf *bf = avp->av_bcbuf;
245 ath_dbg(common, CONFIG, "Removing interface at beacon slot: %d\n",
248 tasklet_disable(&sc->bcon_tasklet);
250 if (bf && bf->bf_mpdu) {
251 struct sk_buff *skb = bf->bf_mpdu;
252 dma_unmap_single(sc->dev, bf->bf_buf_addr,
253 skb->len, DMA_TO_DEVICE);
254 dev_kfree_skb_any(skb);
259 avp->av_bcbuf = NULL;
260 sc->beacon.bslot[avp->av_bslot] = NULL;
262 list_add_tail(&bf->list, &sc->beacon.bbuf);
264 tasklet_enable(&sc->bcon_tasklet);
267 static int ath9k_beacon_choose_slot(struct ath_softc *sc)
269 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
270 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
276 if (sc->sc_ah->opmode != NL80211_IFTYPE_AP) {
277 ath_dbg(common, BEACON, "slot 0, tsf: %llu\n",
278 ath9k_hw_gettsf64(sc->sc_ah));
282 intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
283 tsf = ath9k_hw_gettsf64(sc->sc_ah);
284 tsf += TU_TO_USEC(sc->sc_ah->config.sw_beacon_response_time);
285 tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
286 slot = (tsftu % (intval * ATH_BCBUF)) / intval;
288 ath_dbg(common, BEACON, "slot: %d tsf: %llu tsftu: %u\n",
289 slot, tsf, tsftu / ATH_BCBUF);
294 void ath9k_set_tsfadjust(struct ath_softc *sc, struct ieee80211_vif *vif)
296 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
297 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
298 struct ath_vif *avp = (void *)vif->drv_priv;
301 if (avp->av_bslot == 0)
304 tsfadjust = cur_conf->beacon_interval * avp->av_bslot / ATH_BCBUF;
305 avp->tsf_adjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
307 ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
308 (unsigned long long)tsfadjust, avp->av_bslot);
311 void ath9k_beacon_tasklet(unsigned long data)
313 struct ath_softc *sc = (struct ath_softc *)data;
314 struct ath_hw *ah = sc->sc_ah;
315 struct ath_common *common = ath9k_hw_common(ah);
316 struct ath_buf *bf = NULL;
317 struct ieee80211_vif *vif;
318 bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
321 if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) {
322 ath_dbg(common, RESET,
323 "reset work is pending, skip beaconing now\n");
328 * Check if the previous beacon has gone out. If
329 * not don't try to post another, skip this period
330 * and wait for the next. Missed beacons indicate
331 * a problem and should not occur. If we miss too
332 * many consecutive beacons reset the device.
334 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
335 sc->beacon.bmisscnt++;
337 if (!ath9k_hw_check_alive(ah))
338 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
340 if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
341 ath_dbg(common, BSTUCK,
342 "missed %u consecutive beacons\n",
343 sc->beacon.bmisscnt);
344 ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
345 if (sc->beacon.bmisscnt > 3)
346 ath9k_hw_bstuck_nfcal(ah);
347 } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
348 ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
349 sc->beacon.bmisscnt = 0;
350 ath9k_queue_reset(sc, RESET_TYPE_BEACON_STUCK);
356 slot = ath9k_beacon_choose_slot(sc);
357 vif = sc->beacon.bslot[slot];
359 if (!vif || !vif->bss_conf.enable_beacon)
362 bf = ath9k_beacon_generate(sc->hw, vif);
364 if (sc->beacon.bmisscnt != 0) {
365 ath_dbg(common, BSTUCK, "resume beacon xmit after %u misses\n",
366 sc->beacon.bmisscnt);
367 sc->beacon.bmisscnt = 0;
371 * Handle slot time change when a non-ERP station joins/leaves
372 * an 11g network. The 802.11 layer notifies us via callback,
373 * we mark updateslot, then wait one beacon before effecting
374 * the change. This gives associated stations at least one
375 * beacon interval to note the state change.
377 * NB: The slot time change state machine is clocked according
378 * to whether we are bursting or staggering beacons. We
379 * recognize the request to update and record the current
380 * slot then don't transition until that slot is reached
381 * again. If we miss a beacon for that slot then we'll be
382 * slow to transition but we'll be sure at least one beacon
383 * interval has passed. When bursting slot is always left
384 * set to ATH_BCBUF so this check is a noop.
386 if (sc->beacon.updateslot == UPDATE) {
387 sc->beacon.updateslot = COMMIT;
388 sc->beacon.slotupdate = slot;
389 } else if (sc->beacon.updateslot == COMMIT &&
390 sc->beacon.slotupdate == slot) {
391 ah->slottime = sc->beacon.slottime;
392 ath9k_hw_init_global_settings(ah);
393 sc->beacon.updateslot = OK;
397 ath9k_reset_beacon_status(sc);
399 ath_dbg(common, BEACON,
400 "Transmitting beacon for slot: %d\n", slot);
402 /* NB: cabq traffic should already be queued and primed */
403 ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
406 ath9k_hw_txstart(ah, sc->beacon.beaconq);
411 * Both nexttbtt and intval have to be in usecs.
413 static void ath9k_beacon_init(struct ath_softc *sc, u32 nexttbtt,
414 u32 intval, bool reset_tsf)
416 struct ath_hw *ah = sc->sc_ah;
418 ath9k_hw_disable_interrupts(ah);
420 ath9k_hw_reset_tsf(ah);
421 ath9k_beaconq_config(sc);
422 ath9k_hw_beaconinit(ah, nexttbtt, intval);
423 sc->beacon.bmisscnt = 0;
424 ath9k_hw_set_interrupts(ah);
425 ath9k_hw_enable_interrupts(ah);
429 * For multi-bss ap support beacons are either staggered evenly over N slots or
430 * burst together. For the former arrange for the SWBA to be delivered for each
431 * slot. Slots that are not occupied will generate nothing.
433 static void ath9k_beacon_config_ap(struct ath_softc *sc,
434 struct ath_beacon_config *conf)
436 struct ath_hw *ah = sc->sc_ah;
437 struct ath_common *common = ath9k_hw_common(ah);
438 u32 nexttbtt, intval;
440 /* NB: the beacon interval is kept internally in TU's */
441 intval = TU_TO_USEC(conf->beacon_interval);
445 if (conf->enable_beacon)
446 ah->imask |= ATH9K_INT_SWBA;
448 ah->imask &= ~ATH9K_INT_SWBA;
450 ath_dbg(common, BEACON,
451 "AP (%s) nexttbtt: %u intval: %u conf_intval: %u\n",
452 (conf->enable_beacon) ? "Enable" : "Disable",
453 nexttbtt, intval, conf->beacon_interval);
455 ath9k_beacon_init(sc, nexttbtt, intval, true);
459 * This sets up the beacon timers according to the timestamp of the last
460 * received beacon and the current TSF, configures PCF and DTIM
461 * handling, programs the sleep registers so the hardware will wakeup in
462 * time to receive beacons, and configures the beacon miss handling so
463 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
464 * we've associated with.
466 static void ath9k_beacon_config_sta(struct ath_softc *sc,
467 struct ath_beacon_config *conf)
469 struct ath_hw *ah = sc->sc_ah;
470 struct ath_common *common = ath9k_hw_common(ah);
471 struct ath9k_beacon_state bs;
472 int dtimperiod, dtimcount, sleepduration;
473 int cfpperiod, cfpcount;
474 u32 nexttbtt = 0, intval, tsftu;
476 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
478 /* No need to configure beacon if we are not associated */
479 if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
480 ath_dbg(common, BEACON,
481 "STA is not yet associated..skipping beacon config\n");
485 memset(&bs, 0, sizeof(bs));
486 intval = conf->beacon_interval;
489 * Setup dtim and cfp parameters according to
490 * last beacon we received (which may be none).
492 dtimperiod = conf->dtim_period;
493 dtimcount = conf->dtim_count;
494 if (dtimcount >= dtimperiod) /* NB: sanity check */
496 cfpperiod = 1; /* NB: no PCF support yet */
499 sleepduration = conf->listen_interval * intval;
502 * Pull nexttbtt forward to reflect the current
503 * TSF and calculate dtim+cfp state for the result.
505 tsf = ath9k_hw_gettsf64(ah);
506 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
508 num_beacons = tsftu / intval + 1;
509 offset = tsftu % intval;
510 nexttbtt = tsftu - offset;
514 /* DTIM Beacon every dtimperiod Beacon */
515 dtim_dec_count = num_beacons % dtimperiod;
516 /* CFP every cfpperiod DTIM Beacon */
517 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
521 dtimcount -= dtim_dec_count;
523 dtimcount += dtimperiod;
525 cfpcount -= cfp_dec_count;
527 cfpcount += cfpperiod;
529 bs.bs_intval = intval;
530 bs.bs_nexttbtt = nexttbtt;
531 bs.bs_dtimperiod = dtimperiod*intval;
532 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
533 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
534 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
535 bs.bs_cfpmaxduration = 0;
538 * Calculate the number of consecutive beacons to miss* before taking
539 * a BMISS interrupt. The configuration is specified in TU so we only
540 * need calculate based on the beacon interval. Note that we clamp the
541 * result to at most 15 beacons.
543 if (sleepduration > intval) {
544 bs.bs_bmissthreshold = conf->listen_interval *
545 ATH_DEFAULT_BMISS_LIMIT / 2;
547 bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval);
548 if (bs.bs_bmissthreshold > 15)
549 bs.bs_bmissthreshold = 15;
550 else if (bs.bs_bmissthreshold <= 0)
551 bs.bs_bmissthreshold = 1;
555 * Calculate sleep duration. The configuration is given in ms.
556 * We ensure a multiple of the beacon period is used. Also, if the sleep
557 * duration is greater than the DTIM period then it makes senses
558 * to make it a multiple of that.
563 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
564 if (bs.bs_sleepduration > bs.bs_dtimperiod)
565 bs.bs_sleepduration = bs.bs_dtimperiod;
567 /* TSF out of range threshold fixed at 1 second */
568 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
570 ath_dbg(common, BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
571 ath_dbg(common, BEACON,
572 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
573 bs.bs_bmissthreshold, bs.bs_sleepduration,
574 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
576 /* Set the computed STA beacon timers */
578 ath9k_hw_disable_interrupts(ah);
579 ath9k_hw_set_sta_beacon_timers(ah, &bs);
580 ah->imask |= ATH9K_INT_BMISS;
582 ath9k_hw_set_interrupts(ah);
583 ath9k_hw_enable_interrupts(ah);
586 static void ath9k_beacon_config_adhoc(struct ath_softc *sc,
587 struct ath_beacon_config *conf)
589 struct ath_hw *ah = sc->sc_ah;
590 struct ath_common *common = ath9k_hw_common(ah);
591 u32 intval, nexttbtt;
593 ath9k_reset_beacon_status(sc);
595 intval = TU_TO_USEC(conf->beacon_interval);
597 if (conf->ibss_creator) {
600 u32 tbtt, offset, tsftu;
604 * Pull nexttbtt forward to reflect the current
607 tsf = ath9k_hw_gettsf64(ah);
608 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
609 offset = tsftu % conf->beacon_interval;
610 tbtt = tsftu - offset;
612 tbtt += conf->beacon_interval;
614 nexttbtt = TU_TO_USEC(tbtt);
617 if (conf->enable_beacon)
618 ah->imask |= ATH9K_INT_SWBA;
620 ah->imask &= ~ATH9K_INT_SWBA;
622 ath_dbg(common, BEACON,
623 "IBSS (%s) nexttbtt: %u intval: %u conf_intval: %u\n",
624 (conf->enable_beacon) ? "Enable" : "Disable",
625 nexttbtt, intval, conf->beacon_interval);
627 ath9k_beacon_init(sc, nexttbtt, intval, conf->ibss_creator);
630 * Set the global 'beacon has been configured' flag for the
631 * joiner case in IBSS mode.
633 if (!conf->ibss_creator && conf->enable_beacon)
634 set_bit(SC_OP_BEACONS, &sc->sc_flags);
637 bool ath9k_allow_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif)
639 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
640 struct ath_vif *avp = (void *)vif->drv_priv;
642 if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
643 if ((vif->type != NL80211_IFTYPE_AP) ||
644 (sc->nbcnvifs > 1)) {
645 ath_dbg(common, CONFIG,
646 "An AP interface is already present !\n");
651 if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) {
652 if ((vif->type == NL80211_IFTYPE_STATION) &&
653 test_bit(SC_OP_BEACONS, &sc->sc_flags) &&
654 !avp->primary_sta_vif) {
655 ath_dbg(common, CONFIG,
656 "Beacon already configured for a station interface\n");
664 static void ath9k_cache_beacon_config(struct ath_softc *sc,
665 struct ieee80211_bss_conf *bss_conf)
667 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
668 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
670 ath_dbg(common, BEACON,
671 "Caching beacon data for BSS: %pM\n", bss_conf->bssid);
673 cur_conf->beacon_interval = bss_conf->beacon_int;
674 cur_conf->dtim_period = bss_conf->dtim_period;
675 cur_conf->listen_interval = 1;
676 cur_conf->dtim_count = 1;
677 cur_conf->ibss_creator = bss_conf->ibss_creator;
678 cur_conf->bmiss_timeout =
679 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
682 * It looks like mac80211 may end up using beacon interval of zero in
683 * some cases (at least for mesh point). Avoid getting into an
684 * infinite loop by using a bit safer value instead. To be safe,
685 * do sanity check on beacon interval for all operating modes.
687 if (cur_conf->beacon_interval == 0)
688 cur_conf->beacon_interval = 100;
691 * We don't parse dtim period from mac80211 during the driver
692 * initialization as it breaks association with hidden-ssid
693 * AP and it causes latency in roaming
695 if (cur_conf->dtim_period == 0)
696 cur_conf->dtim_period = 1;
700 void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif,
703 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
704 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
706 bool skip_beacon = false;
708 if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) {
709 ath9k_cache_beacon_config(sc, bss_conf);
710 ath9k_set_beacon(sc);
711 set_bit(SC_OP_BEACONS, &sc->sc_flags);
717 * Take care of multiple interfaces when
718 * enabling/disabling SWBA.
720 if (changed & BSS_CHANGED_BEACON_ENABLED) {
721 if (!bss_conf->enable_beacon &&
722 (sc->nbcnvifs <= 1)) {
723 cur_conf->enable_beacon = false;
724 } else if (bss_conf->enable_beacon) {
725 cur_conf->enable_beacon = true;
726 ath9k_cache_beacon_config(sc, bss_conf);
731 * Configure the HW beacon registers only when we have a valid
734 if (cur_conf->beacon_interval) {
736 * If we are joining an existing IBSS network, start beaconing
737 * only after a TSF-sync has taken place. Ensure that this
738 * happens by setting the appropriate flags.
740 if ((changed & BSS_CHANGED_IBSS) && !bss_conf->ibss_creator &&
741 bss_conf->enable_beacon) {
742 spin_lock_irqsave(&sc->sc_pm_lock, flags);
743 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
744 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
747 ath9k_set_beacon(sc);
751 * Do not set the SC_OP_BEACONS flag for IBSS joiner mode
752 * here, it is done in ath9k_beacon_config_adhoc().
754 if (cur_conf->enable_beacon && !skip_beacon)
755 set_bit(SC_OP_BEACONS, &sc->sc_flags);
757 clear_bit(SC_OP_BEACONS, &sc->sc_flags);
761 void ath9k_set_beacon(struct ath_softc *sc)
763 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
764 struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
766 switch (sc->sc_ah->opmode) {
767 case NL80211_IFTYPE_AP:
768 ath9k_beacon_config_ap(sc, cur_conf);
770 case NL80211_IFTYPE_ADHOC:
771 case NL80211_IFTYPE_MESH_POINT:
772 ath9k_beacon_config_adhoc(sc, cur_conf);
774 case NL80211_IFTYPE_STATION:
775 ath9k_beacon_config_sta(sc, cur_conf);
778 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");