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
== ATH9K_SLOT_TIME_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 info
.txpower
= MAX_RATE_POWER
;
92 info
.keyix
= ATH9K_TXKEYIX_INVALID
;
93 info
.keytype
= ATH9K_KEY_TYPE_CLEAR
;
94 info
.flags
= ATH9K_TXDESC_NOACK
| ATH9K_TXDESC_CLRDMASK
;
96 info
.buf_addr
[0] = bf
->bf_buf_addr
;
97 info
.buf_len
[0] = roundup(skb
->len
, 4);
102 info
.qcu
= sc
->beacon
.beaconq
;
104 info
.rates
[0].Tries
= 1;
105 info
.rates
[0].Rate
= rate
;
106 info
.rates
[0].ChSel
= ath_txchainmask_reduction(sc
, chainmask
, rate
);
108 ath9k_hw_set_txdesc(ah
, bf
->bf_desc
, &info
);
111 static void ath9k_beacon_add_noa(struct ath_softc
*sc
, struct ath_vif
*avp
,
114 static const u8 noa_ie_hdr
[] = {
115 WLAN_EID_VENDOR_SPECIFIC
, /* type */
117 0x50, 0x6f, 0x9a, /* WFA OUI */
118 0x09, /* P2P subtype */
119 0x0c, /* Notice of Absence */
120 0x00, /* LSB of little-endian len */
121 0x00, /* MSB of little-endian len */
124 struct ieee80211_p2p_noa_attr
*noa
;
125 int noa_len
, noa_desc
, i
= 0;
128 if (!avp
->offchannel_duration
&& !avp
->periodic_noa_duration
)
131 noa_desc
= !!avp
->offchannel_duration
+ !!avp
->periodic_noa_duration
;
132 noa_len
= 2 + sizeof(struct ieee80211_p2p_noa_desc
) * noa_desc
;
134 hdr
= skb_put(skb
, sizeof(noa_ie_hdr
));
135 memcpy(hdr
, noa_ie_hdr
, sizeof(noa_ie_hdr
));
136 hdr
[1] = sizeof(noa_ie_hdr
) + noa_len
- 2;
139 noa
= (void *) skb_put(skb
, noa_len
);
140 memset(noa
, 0, noa_len
);
142 noa
->index
= avp
->noa_index
;
143 if (avp
->periodic_noa_duration
) {
144 u32 interval
= TU_TO_USEC(sc
->cur_chan
->beacon
.beacon_interval
);
146 noa
->desc
[i
].count
= 255;
147 noa
->desc
[i
].start_time
= cpu_to_le32(avp
->periodic_noa_start
);
148 noa
->desc
[i
].duration
= cpu_to_le32(avp
->periodic_noa_duration
);
149 noa
->desc
[i
].interval
= cpu_to_le32(interval
);
153 if (avp
->offchannel_duration
) {
154 noa
->desc
[i
].count
= 1;
155 noa
->desc
[i
].start_time
= cpu_to_le32(avp
->offchannel_start
);
156 noa
->desc
[i
].duration
= cpu_to_le32(avp
->offchannel_duration
);
160 static struct ath_buf
*ath9k_beacon_generate(struct ieee80211_hw
*hw
,
161 struct ieee80211_vif
*vif
)
163 struct ath_softc
*sc
= hw
->priv
;
164 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
166 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
168 struct ath_txq
*cabq
= sc
->beacon
.cabq
;
169 struct ieee80211_tx_info
*info
;
170 struct ieee80211_mgmt
*mgmt_hdr
;
173 if (avp
->av_bcbuf
== NULL
)
179 dma_unmap_single(sc
->dev
, bf
->bf_buf_addr
,
180 skb
->len
, DMA_TO_DEVICE
);
181 dev_kfree_skb_any(skb
);
186 skb
= ieee80211_beacon_get(hw
, vif
);
192 mgmt_hdr
= (struct ieee80211_mgmt
*)skb
->data
;
193 mgmt_hdr
->u
.beacon
.timestamp
= avp
->tsf_adjust
;
195 info
= IEEE80211_SKB_CB(skb
);
196 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) {
198 * TODO: make sure the seq# gets assigned properly (vs. other
201 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
202 sc
->tx
.seq_no
+= 0x10;
203 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
204 hdr
->seq_ctrl
|= cpu_to_le16(sc
->tx
.seq_no
);
208 ath9k_beacon_add_noa(sc
, avp
, skb
);
210 bf
->bf_buf_addr
= dma_map_single(sc
->dev
, skb
->data
,
211 skb
->len
, DMA_TO_DEVICE
);
212 if (unlikely(dma_mapping_error(sc
->dev
, bf
->bf_buf_addr
))) {
213 dev_kfree_skb_any(skb
);
216 ath_err(common
, "dma_mapping_error on beaconing\n");
220 skb
= ieee80211_get_buffered_bc(hw
, vif
);
223 * if the CABQ traffic from previous DTIM is pending and the current
224 * beacon is also a DTIM.
225 * 1) if there is only one vif let the cab traffic continue.
226 * 2) if there are more than one vif and we are using staggered
227 * beacons, then drain the cabq by dropping all the frames in
228 * the cabq so that the current vifs cab traffic can be scheduled.
230 spin_lock_bh(&cabq
->axq_lock
);
231 cabq_depth
= cabq
->axq_depth
;
232 spin_unlock_bh(&cabq
->axq_lock
);
234 if (skb
&& cabq_depth
) {
236 ath_dbg(common
, BEACON
,
237 "Flushing previous cabq traffic\n");
238 ath_draintxq(sc
, cabq
);
242 ath9k_beacon_setup(sc
, vif
, bf
, info
->control
.rates
[0].idx
);
245 ath_tx_cabq(hw
, vif
, skb
);
250 void ath9k_beacon_assign_slot(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
252 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
253 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
256 avp
->av_bcbuf
= list_first_entry(&sc
->beacon
.bbuf
, struct ath_buf
, list
);
257 list_del(&avp
->av_bcbuf
->list
);
259 for (slot
= 0; slot
< ATH_BCBUF
; slot
++) {
260 if (sc
->beacon
.bslot
[slot
] == NULL
) {
261 avp
->av_bslot
= slot
;
266 sc
->beacon
.bslot
[avp
->av_bslot
] = vif
;
269 ath_dbg(common
, CONFIG
, "Added interface at beacon slot: %d\n",
273 void ath9k_beacon_remove_slot(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
275 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
276 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
277 struct ath_buf
*bf
= avp
->av_bcbuf
;
279 ath_dbg(common
, CONFIG
, "Removing interface at beacon slot: %d\n",
282 tasklet_disable(&sc
->bcon_tasklet
);
284 if (bf
&& bf
->bf_mpdu
) {
285 struct sk_buff
*skb
= bf
->bf_mpdu
;
286 dma_unmap_single(sc
->dev
, bf
->bf_buf_addr
,
287 skb
->len
, DMA_TO_DEVICE
);
288 dev_kfree_skb_any(skb
);
293 avp
->av_bcbuf
= NULL
;
294 sc
->beacon
.bslot
[avp
->av_bslot
] = NULL
;
296 list_add_tail(&bf
->list
, &sc
->beacon
.bbuf
);
298 tasklet_enable(&sc
->bcon_tasklet
);
301 static int ath9k_beacon_choose_slot(struct ath_softc
*sc
)
303 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
304 struct ath_beacon_config
*cur_conf
= &sc
->cur_chan
->beacon
;
310 if (sc
->sc_ah
->opmode
!= NL80211_IFTYPE_AP
&&
311 sc
->sc_ah
->opmode
!= NL80211_IFTYPE_MESH_POINT
) {
312 ath_dbg(common
, BEACON
, "slot 0, tsf: %llu\n",
313 ath9k_hw_gettsf64(sc
->sc_ah
));
317 intval
= cur_conf
->beacon_interval
? : ATH_DEFAULT_BINTVAL
;
318 tsf
= ath9k_hw_gettsf64(sc
->sc_ah
);
319 tsf
+= TU_TO_USEC(sc
->sc_ah
->config
.sw_beacon_response_time
);
320 tsftu
= TSF_TO_TU((tsf
* ATH_BCBUF
) >>32, tsf
* ATH_BCBUF
);
321 slot
= (tsftu
% (intval
* ATH_BCBUF
)) / intval
;
323 ath_dbg(common
, BEACON
, "slot: %d tsf: %llu tsftu: %u\n",
324 slot
, tsf
, tsftu
/ ATH_BCBUF
);
329 static void ath9k_set_tsfadjust(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
331 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
332 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
333 struct ath_beacon_config
*cur_conf
= &avp
->chanctx
->beacon
;
336 if (avp
->av_bslot
== 0)
339 tsfadjust
= cur_conf
->beacon_interval
* avp
->av_bslot
;
340 tsfadjust
= TU_TO_USEC(tsfadjust
) / ATH_BCBUF
;
341 avp
->tsf_adjust
= cpu_to_le64(tsfadjust
);
343 ath_dbg(common
, CONFIG
, "tsfadjust is: %llu for bslot: %d\n",
344 (unsigned long long)tsfadjust
, avp
->av_bslot
);
347 bool ath9k_csa_is_finished(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
349 if (!vif
|| !vif
->csa_active
)
352 if (!ieee80211_csa_is_complete(vif
))
355 ieee80211_csa_finish(vif
);
359 static void ath9k_csa_update_vif(void *data
, u8
*mac
, struct ieee80211_vif
*vif
)
361 struct ath_softc
*sc
= data
;
362 ath9k_csa_is_finished(sc
, vif
);
365 void ath9k_csa_update(struct ath_softc
*sc
)
367 ieee80211_iterate_active_interfaces_atomic(sc
->hw
,
368 IEEE80211_IFACE_ITER_NORMAL
,
369 ath9k_csa_update_vif
, sc
);
372 void ath9k_beacon_tasklet(unsigned long data
)
374 struct ath_softc
*sc
= (struct ath_softc
*)data
;
375 struct ath_hw
*ah
= sc
->sc_ah
;
376 struct ath_common
*common
= ath9k_hw_common(ah
);
377 struct ath_buf
*bf
= NULL
;
378 struct ieee80211_vif
*vif
;
379 bool edma
= !!(ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
);
382 if (test_bit(ATH_OP_HW_RESET
, &common
->op_flags
)) {
383 ath_dbg(common
, RESET
,
384 "reset work is pending, skip beaconing now\n");
389 * Check if the previous beacon has gone out. If
390 * not don't try to post another, skip this period
391 * and wait for the next. Missed beacons indicate
392 * a problem and should not occur. If we miss too
393 * many consecutive beacons reset the device.
395 if (ath9k_hw_numtxpending(ah
, sc
->beacon
.beaconq
) != 0) {
396 sc
->beacon
.bmisscnt
++;
398 ath9k_hw_check_nav(ah
);
401 * If the previous beacon has not been transmitted
402 * and a MAC/BB hang has been identified, return
403 * here because a chip reset would have been
406 if (!ath_hw_check(sc
))
409 if (sc
->beacon
.bmisscnt
< BSTUCK_THRESH
* sc
->nbcnvifs
) {
410 ath_dbg(common
, BSTUCK
,
411 "missed %u consecutive beacons\n",
412 sc
->beacon
.bmisscnt
);
413 ath9k_hw_stop_dma_queue(ah
, sc
->beacon
.beaconq
);
414 if (sc
->beacon
.bmisscnt
> 3)
415 ath9k_hw_bstuck_nfcal(ah
);
416 } else if (sc
->beacon
.bmisscnt
>= BSTUCK_THRESH
) {
417 ath_dbg(common
, BSTUCK
, "beacon is officially stuck\n");
418 sc
->beacon
.bmisscnt
= 0;
419 ath9k_queue_reset(sc
, RESET_TYPE_BEACON_STUCK
);
425 slot
= ath9k_beacon_choose_slot(sc
);
426 vif
= sc
->beacon
.bslot
[slot
];
428 /* EDMA devices check that in the tx completion function. */
430 if (sc
->sched
.beacon_pending
)
431 ath_chanctx_event(sc
, NULL
,
432 ATH_CHANCTX_EVENT_BEACON_SENT
);
434 if (ath9k_csa_is_finished(sc
, vif
))
438 if (!vif
|| !vif
->bss_conf
.enable_beacon
)
441 ath_chanctx_event(sc
, vif
, ATH_CHANCTX_EVENT_BEACON_PREPARE
);
442 bf
= ath9k_beacon_generate(sc
->hw
, vif
);
444 if (sc
->beacon
.bmisscnt
!= 0) {
445 ath_dbg(common
, BSTUCK
, "resume beacon xmit after %u misses\n",
446 sc
->beacon
.bmisscnt
);
447 sc
->beacon
.bmisscnt
= 0;
451 * Handle slot time change when a non-ERP station joins/leaves
452 * an 11g network. The 802.11 layer notifies us via callback,
453 * we mark updateslot, then wait one beacon before effecting
454 * the change. This gives associated stations at least one
455 * beacon interval to note the state change.
457 * NB: The slot time change state machine is clocked according
458 * to whether we are bursting or staggering beacons. We
459 * recognize the request to update and record the current
460 * slot then don't transition until that slot is reached
461 * again. If we miss a beacon for that slot then we'll be
462 * slow to transition but we'll be sure at least one beacon
463 * interval has passed. When bursting slot is always left
464 * set to ATH_BCBUF so this check is a noop.
466 if (sc
->beacon
.updateslot
== UPDATE
) {
467 sc
->beacon
.updateslot
= COMMIT
;
468 sc
->beacon
.slotupdate
= slot
;
469 } else if (sc
->beacon
.updateslot
== COMMIT
&&
470 sc
->beacon
.slotupdate
== slot
) {
471 ah
->slottime
= sc
->beacon
.slottime
;
472 ath9k_hw_init_global_settings(ah
);
473 sc
->beacon
.updateslot
= OK
;
477 ath9k_reset_beacon_status(sc
);
479 ath_dbg(common
, BEACON
,
480 "Transmitting beacon for slot: %d\n", slot
);
482 /* NB: cabq traffic should already be queued and primed */
483 ath9k_hw_puttxbuf(ah
, sc
->beacon
.beaconq
, bf
->bf_daddr
);
486 ath9k_hw_txstart(ah
, sc
->beacon
.beaconq
);
491 * Both nexttbtt and intval have to be in usecs.
493 static void ath9k_beacon_init(struct ath_softc
*sc
, u32 nexttbtt
,
494 u32 intval
, bool reset_tsf
)
496 struct ath_hw
*ah
= sc
->sc_ah
;
498 ath9k_hw_disable_interrupts(ah
);
500 ath9k_hw_reset_tsf(ah
);
501 ath9k_beaconq_config(sc
);
502 ath9k_hw_beaconinit(ah
, nexttbtt
, intval
);
503 sc
->beacon
.bmisscnt
= 0;
504 ath9k_hw_set_interrupts(ah
);
505 ath9k_hw_enable_interrupts(ah
);
509 * For multi-bss ap support beacons are either staggered evenly over N slots or
510 * burst together. For the former arrange for the SWBA to be delivered for each
511 * slot. Slots that are not occupied will generate nothing.
513 static void ath9k_beacon_config_ap(struct ath_softc
*sc
,
514 struct ath_beacon_config
*conf
)
516 struct ath_hw
*ah
= sc
->sc_ah
;
518 ath9k_cmn_beacon_config_ap(ah
, conf
, ATH_BCBUF
);
519 ath9k_beacon_init(sc
, conf
->nexttbtt
, conf
->intval
, false);
522 static void ath9k_beacon_config_sta(struct ath_hw
*ah
,
523 struct ath_beacon_config
*conf
)
525 struct ath9k_beacon_state bs
;
527 if (ath9k_cmn_beacon_config_sta(ah
, conf
, &bs
) == -EPERM
)
530 ath9k_hw_disable_interrupts(ah
);
531 ath9k_hw_set_sta_beacon_timers(ah
, &bs
);
532 ah
->imask
|= ATH9K_INT_BMISS
;
534 ath9k_hw_set_interrupts(ah
);
535 ath9k_hw_enable_interrupts(ah
);
538 static void ath9k_beacon_config_adhoc(struct ath_softc
*sc
,
539 struct ath_beacon_config
*conf
)
541 struct ath_hw
*ah
= sc
->sc_ah
;
542 struct ath_common
*common
= ath9k_hw_common(ah
);
544 ath9k_reset_beacon_status(sc
);
546 ath9k_cmn_beacon_config_adhoc(ah
, conf
);
548 ath9k_beacon_init(sc
, conf
->nexttbtt
, conf
->intval
, conf
->ibss_creator
);
551 * Set the global 'beacon has been configured' flag for the
552 * joiner case in IBSS mode.
554 if (!conf
->ibss_creator
&& conf
->enable_beacon
)
555 set_bit(ATH_OP_BEACONS
, &common
->op_flags
);
558 static bool ath9k_allow_beacon_config(struct ath_softc
*sc
,
559 struct ieee80211_vif
*vif
)
561 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
563 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) {
564 if ((vif
->type
!= NL80211_IFTYPE_AP
) ||
565 (sc
->nbcnvifs
> 1)) {
566 ath_dbg(common
, CONFIG
,
567 "An AP interface is already present !\n");
572 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_STATION
) {
573 if ((vif
->type
== NL80211_IFTYPE_STATION
) &&
574 test_bit(ATH_OP_BEACONS
, &common
->op_flags
) &&
575 vif
!= sc
->cur_chan
->primary_sta
) {
576 ath_dbg(common
, CONFIG
,
577 "Beacon already configured for a station interface\n");
585 static void ath9k_cache_beacon_config(struct ath_softc
*sc
,
586 struct ath_chanctx
*ctx
,
587 struct ieee80211_bss_conf
*bss_conf
)
589 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
590 struct ath_beacon_config
*cur_conf
= &ctx
->beacon
;
592 ath_dbg(common
, BEACON
,
593 "Caching beacon data for BSS: %pM\n", bss_conf
->bssid
);
595 cur_conf
->beacon_interval
= bss_conf
->beacon_int
;
596 cur_conf
->dtim_period
= bss_conf
->dtim_period
;
597 cur_conf
->dtim_count
= 1;
598 cur_conf
->ibss_creator
= bss_conf
->ibss_creator
;
601 * It looks like mac80211 may end up using beacon interval of zero in
602 * some cases (at least for mesh point). Avoid getting into an
603 * infinite loop by using a bit safer value instead. To be safe,
604 * do sanity check on beacon interval for all operating modes.
606 if (cur_conf
->beacon_interval
== 0)
607 cur_conf
->beacon_interval
= 100;
609 cur_conf
->bmiss_timeout
=
610 ATH_DEFAULT_BMISS_LIMIT
* cur_conf
->beacon_interval
;
613 * We don't parse dtim period from mac80211 during the driver
614 * initialization as it breaks association with hidden-ssid
615 * AP and it causes latency in roaming
617 if (cur_conf
->dtim_period
== 0)
618 cur_conf
->dtim_period
= 1;
622 void ath9k_beacon_config(struct ath_softc
*sc
, struct ieee80211_vif
*vif
,
625 struct ieee80211_bss_conf
*bss_conf
= &vif
->bss_conf
;
626 struct ath_hw
*ah
= sc
->sc_ah
;
627 struct ath_common
*common
= ath9k_hw_common(ah
);
628 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
629 struct ath_chanctx
*ctx
= avp
->chanctx
;
630 struct ath_beacon_config
*cur_conf
;
632 bool skip_beacon
= false;
637 cur_conf
= &avp
->chanctx
->beacon
;
638 if (vif
->type
== NL80211_IFTYPE_AP
)
639 ath9k_set_tsfadjust(sc
, vif
);
641 if (!ath9k_allow_beacon_config(sc
, vif
))
644 if (vif
->type
== NL80211_IFTYPE_STATION
) {
645 ath9k_cache_beacon_config(sc
, ctx
, bss_conf
);
646 if (ctx
!= sc
->cur_chan
)
649 ath9k_set_beacon(sc
);
650 set_bit(ATH_OP_BEACONS
, &common
->op_flags
);
655 * Take care of multiple interfaces when
656 * enabling/disabling SWBA.
658 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
659 if (!bss_conf
->enable_beacon
&&
660 (sc
->nbcnvifs
<= 1)) {
661 cur_conf
->enable_beacon
= false;
662 } else if (bss_conf
->enable_beacon
) {
663 cur_conf
->enable_beacon
= true;
664 ath9k_cache_beacon_config(sc
, ctx
, bss_conf
);
668 if (ctx
!= sc
->cur_chan
)
672 * Configure the HW beacon registers only when we have a valid
675 if (cur_conf
->beacon_interval
) {
677 * If we are joining an existing IBSS network, start beaconing
678 * only after a TSF-sync has taken place. Ensure that this
679 * happens by setting the appropriate flags.
681 if ((changed
& BSS_CHANGED_IBSS
) && !bss_conf
->ibss_creator
&&
682 bss_conf
->enable_beacon
) {
683 spin_lock_irqsave(&sc
->sc_pm_lock
, flags
);
684 sc
->ps_flags
|= PS_BEACON_SYNC
| PS_WAIT_FOR_BEACON
;
685 spin_unlock_irqrestore(&sc
->sc_pm_lock
, flags
);
688 ath9k_set_beacon(sc
);
692 * Do not set the ATH_OP_BEACONS flag for IBSS joiner mode
693 * here, it is done in ath9k_beacon_config_adhoc().
695 if (cur_conf
->enable_beacon
&& !skip_beacon
)
696 set_bit(ATH_OP_BEACONS
, &common
->op_flags
);
698 clear_bit(ATH_OP_BEACONS
, &common
->op_flags
);
702 void ath9k_set_beacon(struct ath_softc
*sc
)
704 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
705 struct ath_beacon_config
*cur_conf
= &sc
->cur_chan
->beacon
;
707 switch (sc
->sc_ah
->opmode
) {
708 case NL80211_IFTYPE_AP
:
709 case NL80211_IFTYPE_MESH_POINT
:
710 ath9k_beacon_config_ap(sc
, cur_conf
);
712 case NL80211_IFTYPE_ADHOC
:
713 ath9k_beacon_config_adhoc(sc
, cur_conf
);
715 case NL80211_IFTYPE_STATION
:
716 ath9k_beacon_config_sta(sc
->sc_ah
, cur_conf
);
719 ath_dbg(common
, CONFIG
, "Unsupported beaconing mode\n");