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 sc
->sc_ah
->opmode
== NL80211_IFTYPE_MESH_POINT
) {
44 /* Always burst out beacon and CAB traffic. */
49 /* Adhoc mode; important thing is to use 2x cwmin. */
50 txq
= sc
->tx
.txq_map
[IEEE80211_AC_BE
];
51 ath9k_hw_get_txq_props(ah
, txq
->axq_qnum
, &qi_be
);
52 qi
.tqi_aifs
= qi_be
.tqi_aifs
;
53 if (ah
->slottime
== 20)
54 qi
.tqi_cwmin
= 2*qi_be
.tqi_cwmin
;
56 qi
.tqi_cwmin
= 4*qi_be
.tqi_cwmin
;
57 qi
.tqi_cwmax
= qi_be
.tqi_cwmax
;
60 if (!ath9k_hw_set_txq_props(ah
, sc
->beacon
.beaconq
, &qi
)) {
61 ath_err(common
, "Unable to update h/w beacon queue parameters\n");
63 ath9k_hw_resettxqueue(ah
, sc
->beacon
.beaconq
);
68 * Associates the beacon frame buffer with a transmit descriptor. Will set
69 * up rate codes, and channel flags. Beacons are always sent out at the
70 * lowest rate, and are not retried.
72 static void ath9k_beacon_setup(struct ath_softc
*sc
, struct ieee80211_vif
*vif
,
73 struct ath_buf
*bf
, int rateidx
)
75 struct sk_buff
*skb
= bf
->bf_mpdu
;
76 struct ath_hw
*ah
= sc
->sc_ah
;
77 struct ath_common
*common
= ath9k_hw_common(ah
);
78 struct ath_tx_info info
;
79 struct ieee80211_supported_band
*sband
;
80 u8 chainmask
= ah
->txchainmask
;
83 sband
= &common
->sbands
[sc
->cur_chandef
.chan
->band
];
84 rate
= sband
->bitrates
[rateidx
].hw_value
;
85 if (vif
->bss_conf
.use_short_preamble
)
86 rate
|= sband
->bitrates
[rateidx
].hw_value_short
;
88 memset(&info
, 0, sizeof(info
));
89 info
.pkt_len
= skb
->len
+ FCS_LEN
;
90 info
.type
= ATH9K_PKT_TYPE_BEACON
;
91 for (i
= 0; i
< 4; i
++)
92 info
.txpower
[i
] = MAX_RATE_POWER
;
93 info
.keyix
= ATH9K_TXKEYIX_INVALID
;
94 info
.keytype
= ATH9K_KEY_TYPE_CLEAR
;
95 info
.flags
= ATH9K_TXDESC_NOACK
| ATH9K_TXDESC_CLRDMASK
;
97 info
.buf_addr
[0] = bf
->bf_buf_addr
;
98 info
.buf_len
[0] = roundup(skb
->len
, 4);
100 info
.is_first
= true;
103 info
.qcu
= sc
->beacon
.beaconq
;
105 info
.rates
[0].Tries
= 1;
106 info
.rates
[0].Rate
= rate
;
107 info
.rates
[0].ChSel
= ath_txchainmask_reduction(sc
, chainmask
, rate
);
109 ath9k_hw_set_txdesc(ah
, bf
->bf_desc
, &info
);
112 static struct ath_buf
*ath9k_beacon_generate(struct ieee80211_hw
*hw
,
113 struct ieee80211_vif
*vif
)
115 struct ath_softc
*sc
= hw
->priv
;
116 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
118 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
120 struct ath_txq
*cabq
= sc
->beacon
.cabq
;
121 struct ieee80211_tx_info
*info
;
122 struct ieee80211_mgmt
*mgmt_hdr
;
125 if (avp
->av_bcbuf
== NULL
)
131 dma_unmap_single(sc
->dev
, bf
->bf_buf_addr
,
132 skb
->len
, DMA_TO_DEVICE
);
133 dev_kfree_skb_any(skb
);
138 skb
= ieee80211_beacon_get(hw
, vif
);
144 mgmt_hdr
= (struct ieee80211_mgmt
*)skb
->data
;
145 mgmt_hdr
->u
.beacon
.timestamp
= avp
->tsf_adjust
;
147 info
= IEEE80211_SKB_CB(skb
);
149 ath_assign_seq(common
, skb
);
151 /* Always assign NOA attr when MCC enabled */
152 if (ath9k_is_chanctx_enabled())
153 ath9k_beacon_add_noa(sc
, avp
, skb
);
155 bf
->bf_buf_addr
= dma_map_single(sc
->dev
, skb
->data
,
156 skb
->len
, DMA_TO_DEVICE
);
157 if (unlikely(dma_mapping_error(sc
->dev
, bf
->bf_buf_addr
))) {
158 dev_kfree_skb_any(skb
);
161 ath_err(common
, "dma_mapping_error on beaconing\n");
165 skb
= ieee80211_get_buffered_bc(hw
, vif
);
168 * if the CABQ traffic from previous DTIM is pending and the current
169 * beacon is also a DTIM.
170 * 1) if there is only one vif let the cab traffic continue.
171 * 2) if there are more than one vif and we are using staggered
172 * beacons, then drain the cabq by dropping all the frames in
173 * the cabq so that the current vifs cab traffic can be scheduled.
175 spin_lock_bh(&cabq
->axq_lock
);
176 cabq_depth
= cabq
->axq_depth
;
177 spin_unlock_bh(&cabq
->axq_lock
);
179 if (skb
&& cabq_depth
) {
180 if (sc
->cur_chan
->nvifs
> 1) {
181 ath_dbg(common
, BEACON
,
182 "Flushing previous cabq traffic\n");
183 ath_draintxq(sc
, cabq
);
187 ath9k_beacon_setup(sc
, vif
, bf
, info
->control
.rates
[0].idx
);
190 ath_tx_cabq(hw
, vif
, skb
);
195 void ath9k_beacon_assign_slot(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
197 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
198 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
201 avp
->av_bcbuf
= list_first_entry(&sc
->beacon
.bbuf
, struct ath_buf
, list
);
202 list_del(&avp
->av_bcbuf
->list
);
204 for (slot
= 0; slot
< ATH_BCBUF
; slot
++) {
205 if (sc
->beacon
.bslot
[slot
] == NULL
) {
206 avp
->av_bslot
= slot
;
211 sc
->beacon
.bslot
[avp
->av_bslot
] = vif
;
214 ath_dbg(common
, CONFIG
, "Added interface at beacon slot: %d\n",
218 void ath9k_beacon_remove_slot(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
220 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
221 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
222 struct ath_buf
*bf
= avp
->av_bcbuf
;
223 struct ath_beacon_config
*cur_conf
= &sc
->cur_chan
->beacon
;
225 ath_dbg(common
, CONFIG
, "Removing interface at beacon slot: %d\n",
228 tasklet_disable(&sc
->bcon_tasklet
);
230 cur_conf
->enable_beacon
&= ~BIT(avp
->av_bslot
);
232 if (bf
&& bf
->bf_mpdu
) {
233 struct sk_buff
*skb
= bf
->bf_mpdu
;
234 dma_unmap_single(sc
->dev
, bf
->bf_buf_addr
,
235 skb
->len
, DMA_TO_DEVICE
);
236 dev_kfree_skb_any(skb
);
241 avp
->av_bcbuf
= NULL
;
242 sc
->beacon
.bslot
[avp
->av_bslot
] = NULL
;
244 list_add_tail(&bf
->list
, &sc
->beacon
.bbuf
);
246 tasklet_enable(&sc
->bcon_tasklet
);
249 static int ath9k_beacon_choose_slot(struct ath_softc
*sc
)
251 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
252 struct ath_beacon_config
*cur_conf
= &sc
->cur_chan
->beacon
;
258 if (sc
->sc_ah
->opmode
!= NL80211_IFTYPE_AP
&&
259 sc
->sc_ah
->opmode
!= NL80211_IFTYPE_MESH_POINT
) {
260 ath_dbg(common
, BEACON
, "slot 0, tsf: %llu\n",
261 ath9k_hw_gettsf64(sc
->sc_ah
));
265 intval
= cur_conf
->beacon_interval
? : ATH_DEFAULT_BINTVAL
;
266 tsf
= ath9k_hw_gettsf64(sc
->sc_ah
);
267 tsf
+= TU_TO_USEC(sc
->sc_ah
->config
.sw_beacon_response_time
);
268 tsftu
= TSF_TO_TU((tsf
* ATH_BCBUF
) >>32, tsf
* ATH_BCBUF
);
269 slot
= (tsftu
% (intval
* ATH_BCBUF
)) / intval
;
271 ath_dbg(common
, BEACON
, "slot: %d tsf: %llu tsftu: %u\n",
272 slot
, tsf
, tsftu
/ ATH_BCBUF
);
277 static void ath9k_set_tsfadjust(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
279 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
280 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
281 struct ath_beacon_config
*cur_conf
= &avp
->chanctx
->beacon
;
284 if (avp
->av_bslot
== 0)
287 /* tsf_adjust is added to the TSF value. We send out the beacon late,
288 * so need to adjust the TSF starting point to be later in time (i.e.
289 * the theoretical first beacon has a TSF of 0 after correction).
291 tsfadjust
= cur_conf
->beacon_interval
* avp
->av_bslot
;
292 tsfadjust
= -TU_TO_USEC(tsfadjust
) / ATH_BCBUF
;
293 avp
->tsf_adjust
= cpu_to_le64(tsfadjust
);
295 ath_dbg(common
, CONFIG
, "tsfadjust is: %lld for bslot: %d\n",
296 (signed long long)tsfadjust
, avp
->av_bslot
);
299 bool ath9k_csa_is_finished(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
301 if (!vif
|| !vif
->csa_active
)
304 if (!ieee80211_csa_is_complete(vif
))
307 ieee80211_csa_finish(vif
);
311 static void ath9k_csa_update_vif(void *data
, u8
*mac
, struct ieee80211_vif
*vif
)
313 struct ath_softc
*sc
= data
;
314 ath9k_csa_is_finished(sc
, vif
);
317 void ath9k_csa_update(struct ath_softc
*sc
)
319 ieee80211_iterate_active_interfaces_atomic(sc
->hw
,
320 IEEE80211_IFACE_ITER_NORMAL
,
321 ath9k_csa_update_vif
, sc
);
324 void ath9k_beacon_tasklet(unsigned long data
)
326 struct ath_softc
*sc
= (struct ath_softc
*)data
;
327 struct ath_hw
*ah
= sc
->sc_ah
;
328 struct ath_common
*common
= ath9k_hw_common(ah
);
329 struct ath_buf
*bf
= NULL
;
330 struct ieee80211_vif
*vif
;
331 bool edma
= !!(ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
);
334 if (test_bit(ATH_OP_HW_RESET
, &common
->op_flags
)) {
335 ath_dbg(common
, RESET
,
336 "reset work is pending, skip beaconing now\n");
341 * Check if the previous beacon has gone out. If
342 * not don't try to post another, skip this period
343 * and wait for the next. Missed beacons indicate
344 * a problem and should not occur. If we miss too
345 * many consecutive beacons reset the device.
347 if (ath9k_hw_numtxpending(ah
, sc
->beacon
.beaconq
) != 0) {
348 sc
->beacon
.bmisscnt
++;
350 ath9k_hw_check_nav(ah
);
353 * If the previous beacon has not been transmitted
354 * and a MAC/BB hang has been identified, return
355 * here because a chip reset would have been
358 if (!ath_hw_check(sc
))
361 if (sc
->beacon
.bmisscnt
< BSTUCK_THRESH
* sc
->nbcnvifs
) {
362 ath_dbg(common
, BSTUCK
,
363 "missed %u consecutive beacons\n",
364 sc
->beacon
.bmisscnt
);
365 ath9k_hw_stop_dma_queue(ah
, sc
->beacon
.beaconq
);
366 if (sc
->beacon
.bmisscnt
> 3)
367 ath9k_hw_bstuck_nfcal(ah
);
368 } else if (sc
->beacon
.bmisscnt
>= BSTUCK_THRESH
) {
369 ath_dbg(common
, BSTUCK
, "beacon is officially stuck\n");
370 sc
->beacon
.bmisscnt
= 0;
371 ath9k_queue_reset(sc
, RESET_TYPE_BEACON_STUCK
);
377 slot
= ath9k_beacon_choose_slot(sc
);
378 vif
= sc
->beacon
.bslot
[slot
];
380 /* EDMA devices check that in the tx completion function. */
382 if (ath9k_is_chanctx_enabled()) {
383 ath_chanctx_beacon_sent_ev(sc
,
384 ATH_CHANCTX_EVENT_BEACON_SENT
);
387 if (ath9k_csa_is_finished(sc
, vif
))
391 if (!vif
|| !vif
->bss_conf
.enable_beacon
)
394 if (ath9k_is_chanctx_enabled()) {
395 ath_chanctx_event(sc
, vif
, ATH_CHANCTX_EVENT_BEACON_PREPARE
);
398 bf
= ath9k_beacon_generate(sc
->hw
, vif
);
400 if (sc
->beacon
.bmisscnt
!= 0) {
401 ath_dbg(common
, BSTUCK
, "resume beacon xmit after %u misses\n",
402 sc
->beacon
.bmisscnt
);
403 sc
->beacon
.bmisscnt
= 0;
407 * Handle slot time change when a non-ERP station joins/leaves
408 * an 11g network. The 802.11 layer notifies us via callback,
409 * we mark updateslot, then wait one beacon before effecting
410 * the change. This gives associated stations at least one
411 * beacon interval to note the state change.
413 * NB: The slot time change state machine is clocked according
414 * to whether we are bursting or staggering beacons. We
415 * recognize the request to update and record the current
416 * slot then don't transition until that slot is reached
417 * again. If we miss a beacon for that slot then we'll be
418 * slow to transition but we'll be sure at least one beacon
419 * interval has passed. When bursting slot is always left
420 * set to ATH_BCBUF so this check is a noop.
422 if (sc
->beacon
.updateslot
== UPDATE
) {
423 sc
->beacon
.updateslot
= COMMIT
;
424 sc
->beacon
.slotupdate
= slot
;
425 } else if (sc
->beacon
.updateslot
== COMMIT
&&
426 sc
->beacon
.slotupdate
== slot
) {
427 ah
->slottime
= sc
->beacon
.slottime
;
428 ath9k_hw_init_global_settings(ah
);
429 sc
->beacon
.updateslot
= OK
;
433 ath9k_reset_beacon_status(sc
);
435 ath_dbg(common
, BEACON
,
436 "Transmitting beacon for slot: %d\n", slot
);
438 /* NB: cabq traffic should already be queued and primed */
439 ath9k_hw_puttxbuf(ah
, sc
->beacon
.beaconq
, bf
->bf_daddr
);
442 ath9k_hw_txstart(ah
, sc
->beacon
.beaconq
);
447 * Both nexttbtt and intval have to be in usecs.
449 static void ath9k_beacon_init(struct ath_softc
*sc
, u32 nexttbtt
,
450 u32 intval
, bool reset_tsf
)
452 struct ath_hw
*ah
= sc
->sc_ah
;
454 ath9k_hw_disable_interrupts(ah
);
456 ath9k_hw_reset_tsf(ah
);
457 ath9k_beaconq_config(sc
);
458 ath9k_hw_beaconinit(ah
, nexttbtt
, intval
);
459 sc
->beacon
.bmisscnt
= 0;
460 ath9k_hw_set_interrupts(ah
);
461 ath9k_hw_enable_interrupts(ah
);
465 * For multi-bss ap support beacons are either staggered evenly over N slots or
466 * burst together. For the former arrange for the SWBA to be delivered for each
467 * slot. Slots that are not occupied will generate nothing.
469 static void ath9k_beacon_config_ap(struct ath_softc
*sc
,
470 struct ath_beacon_config
*conf
)
472 struct ath_hw
*ah
= sc
->sc_ah
;
474 ath9k_cmn_beacon_config_ap(ah
, conf
, ATH_BCBUF
);
475 ath9k_beacon_init(sc
, conf
->nexttbtt
, conf
->intval
, false);
478 static void ath9k_beacon_config_sta(struct ath_hw
*ah
,
479 struct ath_beacon_config
*conf
)
481 struct ath9k_beacon_state bs
;
483 if (ath9k_cmn_beacon_config_sta(ah
, conf
, &bs
) == -EPERM
)
486 ath9k_hw_disable_interrupts(ah
);
487 ath9k_hw_set_sta_beacon_timers(ah
, &bs
);
488 ah
->imask
|= ATH9K_INT_BMISS
;
490 ath9k_hw_set_interrupts(ah
);
491 ath9k_hw_enable_interrupts(ah
);
494 static void ath9k_beacon_config_adhoc(struct ath_softc
*sc
,
495 struct ath_beacon_config
*conf
)
497 struct ath_hw
*ah
= sc
->sc_ah
;
498 struct ath_common
*common
= ath9k_hw_common(ah
);
500 ath9k_reset_beacon_status(sc
);
502 ath9k_cmn_beacon_config_adhoc(ah
, conf
);
504 ath9k_beacon_init(sc
, conf
->nexttbtt
, conf
->intval
, conf
->ibss_creator
);
507 * Set the global 'beacon has been configured' flag for the
508 * joiner case in IBSS mode.
510 if (!conf
->ibss_creator
&& conf
->enable_beacon
)
511 set_bit(ATH_OP_BEACONS
, &common
->op_flags
);
514 static bool ath9k_allow_beacon_config(struct ath_softc
*sc
,
515 struct ieee80211_vif
*vif
)
517 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
518 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
520 if (ath9k_is_chanctx_enabled()) {
522 * If the VIF is not present in the current channel context,
523 * then we can't do the usual opmode checks. Allow the
524 * beacon config for the VIF to be updated in this case and
525 * return immediately.
527 if (sc
->cur_chan
!= avp
->chanctx
)
531 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) {
532 if (vif
->type
!= NL80211_IFTYPE_AP
) {
533 ath_dbg(common
, CONFIG
,
534 "An AP interface is already present !\n");
539 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_STATION
) {
540 if ((vif
->type
== NL80211_IFTYPE_STATION
) &&
541 test_bit(ATH_OP_BEACONS
, &common
->op_flags
) &&
542 vif
!= sc
->cur_chan
->primary_sta
) {
543 ath_dbg(common
, CONFIG
,
544 "Beacon already configured for a station interface\n");
552 static void ath9k_cache_beacon_config(struct ath_softc
*sc
,
553 struct ath_chanctx
*ctx
,
554 struct ieee80211_bss_conf
*bss_conf
)
556 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
557 struct ath_beacon_config
*cur_conf
= &ctx
->beacon
;
559 ath_dbg(common
, BEACON
,
560 "Caching beacon data for BSS: %pM\n", bss_conf
->bssid
);
562 cur_conf
->beacon_interval
= bss_conf
->beacon_int
;
563 cur_conf
->dtim_period
= bss_conf
->dtim_period
;
564 cur_conf
->dtim_count
= 1;
565 cur_conf
->ibss_creator
= bss_conf
->ibss_creator
;
568 * It looks like mac80211 may end up using beacon interval of zero in
569 * some cases (at least for mesh point). Avoid getting into an
570 * infinite loop by using a bit safer value instead. To be safe,
571 * do sanity check on beacon interval for all operating modes.
573 if (cur_conf
->beacon_interval
== 0)
574 cur_conf
->beacon_interval
= 100;
576 cur_conf
->bmiss_timeout
=
577 ATH_DEFAULT_BMISS_LIMIT
* cur_conf
->beacon_interval
;
580 * We don't parse dtim period from mac80211 during the driver
581 * initialization as it breaks association with hidden-ssid
582 * AP and it causes latency in roaming
584 if (cur_conf
->dtim_period
== 0)
585 cur_conf
->dtim_period
= 1;
589 void ath9k_beacon_config(struct ath_softc
*sc
, struct ieee80211_vif
*vif
,
592 struct ieee80211_bss_conf
*bss_conf
= &vif
->bss_conf
;
593 struct ath_hw
*ah
= sc
->sc_ah
;
594 struct ath_common
*common
= ath9k_hw_common(ah
);
595 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
596 struct ath_chanctx
*ctx
= avp
->chanctx
;
597 struct ath_beacon_config
*cur_conf
;
599 bool skip_beacon
= false;
604 cur_conf
= &avp
->chanctx
->beacon
;
605 if (vif
->type
== NL80211_IFTYPE_AP
)
606 ath9k_set_tsfadjust(sc
, vif
);
608 if (!ath9k_allow_beacon_config(sc
, vif
))
611 if (vif
->type
== NL80211_IFTYPE_STATION
) {
612 ath9k_cache_beacon_config(sc
, ctx
, bss_conf
);
613 if (ctx
!= sc
->cur_chan
)
616 ath9k_set_beacon(sc
);
617 set_bit(ATH_OP_BEACONS
, &common
->op_flags
);
622 * Take care of multiple interfaces when
623 * enabling/disabling SWBA.
625 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
626 bool enabled
= cur_conf
->enable_beacon
;
628 if (!bss_conf
->enable_beacon
) {
629 cur_conf
->enable_beacon
&= ~BIT(avp
->av_bslot
);
631 cur_conf
->enable_beacon
|= BIT(avp
->av_bslot
);
633 ath9k_cache_beacon_config(sc
, ctx
, bss_conf
);
637 if (ctx
!= sc
->cur_chan
)
641 * Configure the HW beacon registers only when we have a valid
644 if (cur_conf
->beacon_interval
) {
646 * If we are joining an existing IBSS network, start beaconing
647 * only after a TSF-sync has taken place. Ensure that this
648 * happens by setting the appropriate flags.
650 if ((changed
& BSS_CHANGED_IBSS
) && !bss_conf
->ibss_creator
&&
651 bss_conf
->enable_beacon
) {
652 spin_lock_irqsave(&sc
->sc_pm_lock
, flags
);
653 sc
->ps_flags
|= PS_BEACON_SYNC
| PS_WAIT_FOR_BEACON
;
654 spin_unlock_irqrestore(&sc
->sc_pm_lock
, flags
);
657 ath9k_set_beacon(sc
);
661 * Do not set the ATH_OP_BEACONS flag for IBSS joiner mode
662 * here, it is done in ath9k_beacon_config_adhoc().
664 if (cur_conf
->enable_beacon
&& !skip_beacon
)
665 set_bit(ATH_OP_BEACONS
, &common
->op_flags
);
667 clear_bit(ATH_OP_BEACONS
, &common
->op_flags
);
671 void ath9k_set_beacon(struct ath_softc
*sc
)
673 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
674 struct ath_beacon_config
*cur_conf
= &sc
->cur_chan
->beacon
;
676 switch (sc
->sc_ah
->opmode
) {
677 case NL80211_IFTYPE_AP
:
678 case NL80211_IFTYPE_MESH_POINT
:
679 ath9k_beacon_config_ap(sc
, cur_conf
);
681 case NL80211_IFTYPE_ADHOC
:
682 ath9k_beacon_config_adhoc(sc
, cur_conf
);
684 case NL80211_IFTYPE_STATION
:
685 ath9k_beacon_config_sta(sc
->sc_ah
, cur_conf
);
688 ath_dbg(common
, CONFIG
, "Unsupported beaconing mode\n");