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
.chandef
.chan
->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");