2 * Copyright (c) 2008-2009 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.
22 * This function will modify certain transmit queue properties depending on
23 * the operating mode of the station (AP or AdHoc). Parameters are AIFS
24 * settings and channel width min/max
26 static int ath_beaconq_config(struct ath_softc
*sc
)
28 struct ath_hw
*ah
= sc
->sc_ah
;
29 struct ath9k_tx_queue_info qi
;
31 ath9k_hw_get_txq_props(ah
, sc
->beacon
.beaconq
, &qi
);
32 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) {
33 /* Always burst out beacon and CAB traffic. */
38 /* Adhoc mode; important thing is to use 2x cwmin. */
39 qi
.tqi_aifs
= sc
->beacon
.beacon_qi
.tqi_aifs
;
40 qi
.tqi_cwmin
= 2*sc
->beacon
.beacon_qi
.tqi_cwmin
;
41 qi
.tqi_cwmax
= sc
->beacon
.beacon_qi
.tqi_cwmax
;
44 if (!ath9k_hw_set_txq_props(ah
, sc
->beacon
.beaconq
, &qi
)) {
45 DPRINTF(sc
, ATH_DBG_FATAL
,
46 "unable to update h/w beacon queue parameters\n");
49 ath9k_hw_resettxqueue(ah
, sc
->beacon
.beaconq
);
55 * Associates the beacon frame buffer with a transmit descriptor. Will set
56 * up all required antenna switch parameters, rate codes, and channel flags.
57 * Beacons are always sent out at the lowest rate, and are not retried.
59 static void ath_beacon_setup(struct ath_softc
*sc
, struct ath_vif
*avp
,
62 struct sk_buff
*skb
= (struct sk_buff
*)bf
->bf_mpdu
;
63 struct ath_hw
*ah
= sc
->sc_ah
;
65 struct ath9k_11n_rate_series series
[4];
66 struct ath_rate_table
*rt
;
67 int flags
, antenna
, ctsrate
= 0, ctsduration
= 0;
71 flags
= ATH9K_TXDESC_NOACK
;
73 if (((sc
->sc_ah
->opmode
== NL80211_IFTYPE_ADHOC
) ||
74 (sc
->sc_ah
->opmode
== NL80211_IFTYPE_MESH_POINT
)) &&
75 (ah
->caps
.hw_caps
& ATH9K_HW_CAP_VEOL
)) {
76 ds
->ds_link
= bf
->bf_daddr
; /* self-linked */
77 flags
|= ATH9K_TXDESC_VEOL
;
78 /* Let hardware handle antenna switching. */
83 * Switch antenna every beacon.
84 * Should only switch every beacon period, not for every SWBA
85 * XXX assumes two antennae
87 antenna
= ((sc
->beacon
.ast_be_xmit
/ sc
->nbcnvifs
) & 1 ? 2 : 1);
90 ds
->ds_data
= bf
->bf_buf_addr
;
92 rt
= sc
->cur_rate_table
;
93 rate
= rt
->info
[0].ratecode
;
94 if (sc
->sc_flags
& SC_OP_PREAMBLE_SHORT
)
95 rate
|= rt
->info
[0].short_preamble
;
97 ath9k_hw_set11n_txdesc(ah
, ds
, skb
->len
+ FCS_LEN
,
98 ATH9K_PKT_TYPE_BEACON
,
100 ATH9K_TXKEYIX_INVALID
,
101 ATH9K_KEY_TYPE_CLEAR
,
104 /* NB: beacon's BufLen must be a multiple of 4 bytes */
105 ath9k_hw_filltxdesc(ah
, ds
, roundup(skb
->len
, 4),
108 memset(series
, 0, sizeof(struct ath9k_11n_rate_series
) * 4);
110 series
[0].Rate
= rate
;
111 series
[0].ChSel
= sc
->tx_chainmask
;
112 series
[0].RateFlags
= (ctsrate
) ? ATH9K_RATESERIES_RTS_CTS
: 0;
113 ath9k_hw_set11n_ratescenario(ah
, ds
, ds
, 0, ctsrate
, ctsduration
,
117 static struct ath_buf
*ath_beacon_generate(struct ieee80211_hw
*hw
,
118 struct ieee80211_vif
*vif
)
120 struct ath_wiphy
*aphy
= hw
->priv
;
121 struct ath_softc
*sc
= aphy
->sc
;
125 struct ath_txq
*cabq
;
126 struct ieee80211_tx_info
*info
;
129 if (aphy
->state
!= ATH_WIPHY_ACTIVE
)
132 avp
= (void *)vif
->drv_priv
;
133 cabq
= sc
->beacon
.cabq
;
135 if (avp
->av_bcbuf
== NULL
) {
136 DPRINTF(sc
, ATH_DBG_BEACON
, "avp=%p av_bcbuf=%p\n",
141 /* Release the old beacon first */
144 skb
= (struct sk_buff
*)bf
->bf_mpdu
;
146 dma_unmap_single(sc
->dev
, bf
->bf_dmacontext
,
147 skb
->len
, DMA_TO_DEVICE
);
148 dev_kfree_skb_any(skb
);
151 /* Get a new beacon from mac80211 */
153 skb
= ieee80211_beacon_get(hw
, vif
);
157 ((struct ieee80211_mgmt
*)skb
->data
)->u
.beacon
.timestamp
=
160 info
= IEEE80211_SKB_CB(skb
);
161 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) {
163 * TODO: make sure the seq# gets assigned properly (vs. other
166 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
167 sc
->tx
.seq_no
+= 0x10;
168 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
169 hdr
->seq_ctrl
|= cpu_to_le16(sc
->tx
.seq_no
);
172 bf
->bf_buf_addr
= bf
->bf_dmacontext
=
173 dma_map_single(sc
->dev
, skb
->data
,
174 skb
->len
, DMA_TO_DEVICE
);
175 if (unlikely(dma_mapping_error(sc
->dev
, bf
->bf_buf_addr
))) {
176 dev_kfree_skb_any(skb
);
178 DPRINTF(sc
, ATH_DBG_FATAL
, "dma_mapping_error on beaconing\n");
182 skb
= ieee80211_get_buffered_bc(hw
, vif
);
185 * if the CABQ traffic from previous DTIM is pending and the current
186 * beacon is also a DTIM.
187 * 1) if there is only one vif let the cab traffic continue.
188 * 2) if there are more than one vif and we are using staggered
189 * beacons, then drain the cabq by dropping all the frames in
190 * the cabq so that the current vifs cab traffic can be scheduled.
192 spin_lock_bh(&cabq
->axq_lock
);
193 cabq_depth
= cabq
->axq_depth
;
194 spin_unlock_bh(&cabq
->axq_lock
);
196 if (skb
&& cabq_depth
) {
198 DPRINTF(sc
, ATH_DBG_BEACON
,
199 "Flushing previous cabq traffic\n");
200 ath_draintxq(sc
, cabq
, false);
204 ath_beacon_setup(sc
, avp
, bf
);
207 ath_tx_cabq(hw
, skb
);
208 skb
= ieee80211_get_buffered_bc(hw
, vif
);
215 * Startup beacon transmission for adhoc mode when they are sent entirely
216 * by the hardware using the self-linked descriptor + veol trick.
218 static void ath_beacon_start_adhoc(struct ath_softc
*sc
,
219 struct ieee80211_vif
*vif
)
221 struct ath_hw
*ah
= sc
->sc_ah
;
226 avp
= (void *)vif
->drv_priv
;
228 if (avp
->av_bcbuf
== NULL
)
232 skb
= (struct sk_buff
*) bf
->bf_mpdu
;
234 ath_beacon_setup(sc
, avp
, bf
);
236 /* NB: caller is known to have already stopped tx dma */
237 ath9k_hw_puttxbuf(ah
, sc
->beacon
.beaconq
, bf
->bf_daddr
);
238 ath9k_hw_txstart(ah
, sc
->beacon
.beaconq
);
239 DPRINTF(sc
, ATH_DBG_BEACON
, "TXDP%u = %llx (%p)\n",
240 sc
->beacon
.beaconq
, ito64(bf
->bf_daddr
), bf
->bf_desc
);
243 int ath_beaconq_setup(struct ath_hw
*ah
)
245 struct ath9k_tx_queue_info qi
;
247 memset(&qi
, 0, sizeof(qi
));
251 /* NB: don't enable any interrupts */
252 return ath9k_hw_setuptxqueue(ah
, ATH9K_TX_QUEUE_BEACON
, &qi
);
255 int ath_beacon_alloc(struct ath_wiphy
*aphy
, struct ieee80211_vif
*vif
)
257 struct ath_softc
*sc
= aphy
->sc
;
263 avp
= (void *)vif
->drv_priv
;
265 /* Allocate a beacon descriptor if we haven't done so. */
266 if (!avp
->av_bcbuf
) {
267 /* Allocate beacon state for hostap/ibss. We know
268 * a buffer is available. */
269 avp
->av_bcbuf
= list_first_entry(&sc
->beacon
.bbuf
,
270 struct ath_buf
, list
);
271 list_del(&avp
->av_bcbuf
->list
);
273 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
||
274 !(sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_VEOL
)) {
277 * Assign the vif to a beacon xmit slot. As
278 * above, this cannot fail to find one.
281 for (slot
= 0; slot
< ATH_BCBUF
; slot
++)
282 if (sc
->beacon
.bslot
[slot
] == NULL
) {
284 * XXX hack, space out slots to better
287 if (slot
+1 < ATH_BCBUF
&&
288 sc
->beacon
.bslot
[slot
+1] == NULL
) {
289 avp
->av_bslot
= slot
+1;
292 avp
->av_bslot
= slot
;
293 /* NB: keep looking for a double slot */
295 BUG_ON(sc
->beacon
.bslot
[avp
->av_bslot
] != NULL
);
296 sc
->beacon
.bslot
[avp
->av_bslot
] = vif
;
297 sc
->beacon
.bslot_aphy
[avp
->av_bslot
] = aphy
;
302 /* release the previous beacon frame, if it already exists. */
304 if (bf
->bf_mpdu
!= NULL
) {
305 skb
= (struct sk_buff
*)bf
->bf_mpdu
;
306 dma_unmap_single(sc
->dev
, bf
->bf_dmacontext
,
307 skb
->len
, DMA_TO_DEVICE
);
308 dev_kfree_skb_any(skb
);
312 /* NB: the beacon data buffer must be 32-bit aligned. */
313 skb
= ieee80211_beacon_get(sc
->hw
, vif
);
315 DPRINTF(sc
, ATH_DBG_BEACON
, "cannot get skb\n");
319 tstamp
= ((struct ieee80211_mgmt
*)skb
->data
)->u
.beacon
.timestamp
;
320 sc
->beacon
.bc_tstamp
= le64_to_cpu(tstamp
);
321 /* Calculate a TSF adjustment factor required for staggered beacons. */
322 if (avp
->av_bslot
> 0) {
326 intval
= sc
->hw
->conf
.beacon_int
?
327 sc
->hw
->conf
.beacon_int
: ATH_DEFAULT_BINTVAL
;
330 * Calculate the TSF offset for this beacon slot, i.e., the
331 * number of usecs that need to be added to the timestamp field
332 * in Beacon and Probe Response frames. Beacon slot 0 is
333 * processed at the correct offset, so it does not require TSF
334 * adjustment. Other slots are adjusted to get the timestamp
335 * close to the TBTT for the BSS.
337 tsfadjust
= intval
* avp
->av_bslot
/ ATH_BCBUF
;
338 avp
->tsf_adjust
= cpu_to_le64(TU_TO_USEC(tsfadjust
));
340 DPRINTF(sc
, ATH_DBG_BEACON
,
341 "stagger beacons, bslot %d intval %u tsfadjust %llu\n",
342 avp
->av_bslot
, intval
, (unsigned long long)tsfadjust
);
344 ((struct ieee80211_mgmt
*)skb
->data
)->u
.beacon
.timestamp
=
347 avp
->tsf_adjust
= cpu_to_le64(0);
350 bf
->bf_buf_addr
= bf
->bf_dmacontext
=
351 dma_map_single(sc
->dev
, skb
->data
,
352 skb
->len
, DMA_TO_DEVICE
);
353 if (unlikely(dma_mapping_error(sc
->dev
, bf
->bf_buf_addr
))) {
354 dev_kfree_skb_any(skb
);
356 DPRINTF(sc
, ATH_DBG_FATAL
,
357 "dma_mapping_error on beacon alloc\n");
364 void ath_beacon_return(struct ath_softc
*sc
, struct ath_vif
*avp
)
366 if (avp
->av_bcbuf
!= NULL
) {
369 if (avp
->av_bslot
!= -1) {
370 sc
->beacon
.bslot
[avp
->av_bslot
] = NULL
;
371 sc
->beacon
.bslot_aphy
[avp
->av_bslot
] = NULL
;
376 if (bf
->bf_mpdu
!= NULL
) {
377 struct sk_buff
*skb
= (struct sk_buff
*)bf
->bf_mpdu
;
378 dma_unmap_single(sc
->dev
, bf
->bf_dmacontext
,
379 skb
->len
, DMA_TO_DEVICE
);
380 dev_kfree_skb_any(skb
);
383 list_add_tail(&bf
->list
, &sc
->beacon
.bbuf
);
385 avp
->av_bcbuf
= NULL
;
389 void ath_beacon_tasklet(unsigned long data
)
391 struct ath_softc
*sc
= (struct ath_softc
*)data
;
392 struct ath_hw
*ah
= sc
->sc_ah
;
393 struct ath_buf
*bf
= NULL
;
394 struct ieee80211_vif
*vif
;
395 struct ath_wiphy
*aphy
;
397 u32 bfaddr
, bc
= 0, tsftu
;
402 * Check if the previous beacon has gone out. If
403 * not don't try to post another, skip this period
404 * and wait for the next. Missed beacons indicate
405 * a problem and should not occur. If we miss too
406 * many consecutive beacons reset the device.
408 if (ath9k_hw_numtxpending(ah
, sc
->beacon
.beaconq
) != 0) {
409 sc
->beacon
.bmisscnt
++;
411 if (sc
->beacon
.bmisscnt
< BSTUCK_THRESH
) {
412 DPRINTF(sc
, ATH_DBG_BEACON
,
413 "missed %u consecutive beacons\n",
414 sc
->beacon
.bmisscnt
);
415 } else if (sc
->beacon
.bmisscnt
>= BSTUCK_THRESH
) {
416 DPRINTF(sc
, ATH_DBG_BEACON
,
417 "beacon is officially stuck\n");
418 ath_reset(sc
, false);
424 if (sc
->beacon
.bmisscnt
!= 0) {
425 DPRINTF(sc
, ATH_DBG_BEACON
,
426 "resume beacon xmit after %u misses\n",
427 sc
->beacon
.bmisscnt
);
428 sc
->beacon
.bmisscnt
= 0;
432 * Generate beacon frames. we are sending frames
433 * staggered so calculate the slot for this frame based
434 * on the tsf to safeguard against missing an swba.
437 intval
= sc
->hw
->conf
.beacon_int
?
438 sc
->hw
->conf
.beacon_int
: ATH_DEFAULT_BINTVAL
;
440 tsf
= ath9k_hw_gettsf64(ah
);
441 tsftu
= TSF_TO_TU(tsf
>>32, tsf
);
442 slot
= ((tsftu
% intval
) * ATH_BCBUF
) / intval
;
444 * Reverse the slot order to get slot 0 on the TBTT offset that does
445 * not require TSF adjustment and other slots adding
446 * slot/ATH_BCBUF * beacon_int to timestamp. For example, with
447 * ATH_BCBUF = 4, we process beacon slots as follows: 3 2 1 0 3 2 1 ..
448 * and slot 0 is at correct offset to TBTT.
450 slot
= ATH_BCBUF
- slot
- 1;
451 vif
= sc
->beacon
.bslot
[slot
];
452 aphy
= sc
->beacon
.bslot_aphy
[slot
];
454 DPRINTF(sc
, ATH_DBG_BEACON
,
455 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
456 slot
, tsf
, tsftu
, intval
, vif
);
460 bf
= ath_beacon_generate(aphy
->hw
, vif
);
462 bfaddr
= bf
->bf_daddr
;
468 * Handle slot time change when a non-ERP station joins/leaves
469 * an 11g network. The 802.11 layer notifies us via callback,
470 * we mark updateslot, then wait one beacon before effecting
471 * the change. This gives associated stations at least one
472 * beacon interval to note the state change.
474 * NB: The slot time change state machine is clocked according
475 * to whether we are bursting or staggering beacons. We
476 * recognize the request to update and record the current
477 * slot then don't transition until that slot is reached
478 * again. If we miss a beacon for that slot then we'll be
479 * slow to transition but we'll be sure at least one beacon
480 * interval has passed. When bursting slot is always left
481 * set to ATH_BCBUF so this check is a noop.
483 if (sc
->beacon
.updateslot
== UPDATE
) {
484 sc
->beacon
.updateslot
= COMMIT
; /* commit next beacon */
485 sc
->beacon
.slotupdate
= slot
;
486 } else if (sc
->beacon
.updateslot
== COMMIT
&& sc
->beacon
.slotupdate
== slot
) {
487 ath9k_hw_setslottime(sc
->sc_ah
, sc
->beacon
.slottime
);
488 sc
->beacon
.updateslot
= OK
;
492 * Stop any current dma and put the new frame(s) on the queue.
493 * This should never fail since we check above that no frames
494 * are still pending on the queue.
496 if (!ath9k_hw_stoptxdma(ah
, sc
->beacon
.beaconq
)) {
497 DPRINTF(sc
, ATH_DBG_FATAL
,
498 "beacon queue %u did not stop?\n", sc
->beacon
.beaconq
);
501 /* NB: cabq traffic should already be queued and primed */
502 ath9k_hw_puttxbuf(ah
, sc
->beacon
.beaconq
, bfaddr
);
503 ath9k_hw_txstart(ah
, sc
->beacon
.beaconq
);
505 sc
->beacon
.ast_be_xmit
+= bc
; /* XXX per-vif? */
510 * For multi-bss ap support beacons are either staggered evenly over N slots or
511 * burst together. For the former arrange for the SWBA to be delivered for each
512 * slot. Slots that are not occupied will generate nothing.
514 static void ath_beacon_config_ap(struct ath_softc
*sc
,
515 struct ath_beacon_config
*conf
,
518 u32 nexttbtt
, intval
;
520 /* Configure the timers only when the TSF has to be reset */
522 if (!(sc
->sc_flags
& SC_OP_TSF_RESET
))
525 /* NB: the beacon interval is kept internally in TU's */
526 intval
= conf
->beacon_interval
& ATH9K_BEACON_PERIOD
;
527 intval
/= ATH_BCBUF
; /* for staggered beacons */
529 intval
|= ATH9K_BEACON_RESET_TSF
;
532 * In AP mode we enable the beacon timers and SWBA interrupts to
533 * prepare beacon frames.
535 intval
|= ATH9K_BEACON_ENA
;
536 sc
->imask
|= ATH9K_INT_SWBA
;
537 ath_beaconq_config(sc
);
539 /* Set the computed AP beacon timers */
541 ath9k_hw_set_interrupts(sc
->sc_ah
, 0);
542 ath9k_hw_beaconinit(sc
->sc_ah
, nexttbtt
, intval
);
543 sc
->beacon
.bmisscnt
= 0;
544 ath9k_hw_set_interrupts(sc
->sc_ah
, sc
->imask
);
546 /* Clear the reset TSF flag, so that subsequent beacon updation
547 will not reset the HW TSF. */
549 sc
->sc_flags
&= ~SC_OP_TSF_RESET
;
553 * This sets up the beacon timers according to the timestamp of the last
554 * received beacon and the current TSF, configures PCF and DTIM
555 * handling, programs the sleep registers so the hardware will wakeup in
556 * time to receive beacons, and configures the beacon miss handling so
557 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
558 * we've associated with.
560 static void ath_beacon_config_sta(struct ath_softc
*sc
,
561 struct ath_beacon_config
*conf
,
564 struct ath9k_beacon_state bs
;
565 int dtimperiod
, dtimcount
, sleepduration
;
566 int cfpperiod
, cfpcount
;
567 u32 nexttbtt
= 0, intval
, tsftu
;
570 memset(&bs
, 0, sizeof(bs
));
571 intval
= conf
->beacon_interval
& ATH9K_BEACON_PERIOD
;
574 * Setup dtim and cfp parameters according to
575 * last beacon we received (which may be none).
577 dtimperiod
= conf
->dtim_period
;
578 if (dtimperiod
<= 0) /* NB: 0 if not known */
580 dtimcount
= conf
->dtim_count
;
581 if (dtimcount
>= dtimperiod
) /* NB: sanity check */
583 cfpperiod
= 1; /* NB: no PCF support yet */
586 sleepduration
= conf
->listen_interval
* intval
;
587 if (sleepduration
<= 0)
588 sleepduration
= intval
;
591 * Pull nexttbtt forward to reflect the current
592 * TSF and calculate dtim+cfp state for the result.
594 tsf
= ath9k_hw_gettsf64(sc
->sc_ah
);
595 tsftu
= TSF_TO_TU(tsf
>>32, tsf
) + FUDGE
;
598 if (--dtimcount
< 0) {
599 dtimcount
= dtimperiod
- 1;
601 cfpcount
= cfpperiod
- 1;
603 } while (nexttbtt
< tsftu
);
605 bs
.bs_intval
= intval
;
606 bs
.bs_nexttbtt
= nexttbtt
;
607 bs
.bs_dtimperiod
= dtimperiod
*intval
;
608 bs
.bs_nextdtim
= bs
.bs_nexttbtt
+ dtimcount
*intval
;
609 bs
.bs_cfpperiod
= cfpperiod
*bs
.bs_dtimperiod
;
610 bs
.bs_cfpnext
= bs
.bs_nextdtim
+ cfpcount
*bs
.bs_dtimperiod
;
611 bs
.bs_cfpmaxduration
= 0;
614 * Calculate the number of consecutive beacons to miss* before taking
615 * a BMISS interrupt. The configuration is specified in TU so we only
616 * need calculate based on the beacon interval. Note that we clamp the
617 * result to at most 15 beacons.
619 if (sleepduration
> intval
) {
620 bs
.bs_bmissthreshold
= conf
->listen_interval
*
621 ATH_DEFAULT_BMISS_LIMIT
/ 2;
623 bs
.bs_bmissthreshold
= DIV_ROUND_UP(conf
->bmiss_timeout
, intval
);
624 if (bs
.bs_bmissthreshold
> 15)
625 bs
.bs_bmissthreshold
= 15;
626 else if (bs
.bs_bmissthreshold
<= 0)
627 bs
.bs_bmissthreshold
= 1;
631 * Calculate sleep duration. The configuration is given in ms.
632 * We ensure a multiple of the beacon period is used. Also, if the sleep
633 * duration is greater than the DTIM period then it makes senses
634 * to make it a multiple of that.
639 bs
.bs_sleepduration
= roundup(IEEE80211_MS_TO_TU(100), sleepduration
);
640 if (bs
.bs_sleepduration
> bs
.bs_dtimperiod
)
641 bs
.bs_sleepduration
= bs
.bs_dtimperiod
;
643 /* TSF out of range threshold fixed at 1 second */
644 bs
.bs_tsfoor_threshold
= ATH9K_TSFOOR_THRESHOLD
;
646 DPRINTF(sc
, ATH_DBG_BEACON
, "tsf: %llu tsftu: %u\n", tsf
, tsftu
);
647 DPRINTF(sc
, ATH_DBG_BEACON
,
648 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
649 bs
.bs_bmissthreshold
, bs
.bs_sleepduration
,
650 bs
.bs_cfpperiod
, bs
.bs_cfpmaxduration
, bs
.bs_cfpnext
);
652 /* Set the computed STA beacon timers */
654 ath9k_hw_set_interrupts(sc
->sc_ah
, 0);
655 ath9k_hw_set_sta_beacon_timers(sc
->sc_ah
, &bs
);
656 sc
->imask
|= ATH9K_INT_BMISS
;
657 ath9k_hw_set_interrupts(sc
->sc_ah
, sc
->imask
);
660 static void ath_beacon_config_adhoc(struct ath_softc
*sc
,
661 struct ath_beacon_config
*conf
,
663 struct ieee80211_vif
*vif
)
666 u32 tsftu
, intval
, nexttbtt
;
668 intval
= conf
->beacon_interval
& ATH9K_BEACON_PERIOD
;
670 /* Pull nexttbtt forward to reflect the current TSF */
672 nexttbtt
= TSF_TO_TU(sc
->beacon
.bc_tstamp
>> 32, sc
->beacon
.bc_tstamp
);
676 nexttbtt
= roundup(nexttbtt
, intval
);
678 tsf
= ath9k_hw_gettsf64(sc
->sc_ah
);
679 tsftu
= TSF_TO_TU((u32
)(tsf
>>32), (u32
)tsf
) + FUDGE
;
682 } while (nexttbtt
< tsftu
);
684 DPRINTF(sc
, ATH_DBG_BEACON
,
685 "IBSS nexttbtt %u intval %u (%u)\n",
686 nexttbtt
, intval
, conf
->beacon_interval
);
689 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
690 * if we need to manually prepare beacon frames. Otherwise we use a
691 * self-linked tx descriptor and let the hardware deal with things.
693 intval
|= ATH9K_BEACON_ENA
;
694 if (!(sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_VEOL
))
695 sc
->imask
|= ATH9K_INT_SWBA
;
697 ath_beaconq_config(sc
);
699 /* Set the computed ADHOC beacon timers */
701 ath9k_hw_set_interrupts(sc
->sc_ah
, 0);
702 ath9k_hw_beaconinit(sc
->sc_ah
, nexttbtt
, intval
);
703 sc
->beacon
.bmisscnt
= 0;
704 ath9k_hw_set_interrupts(sc
->sc_ah
, sc
->imask
);
706 if (sc
->sc_ah
->caps
.hw_caps
& ATH9K_HW_CAP_VEOL
)
707 ath_beacon_start_adhoc(sc
, vif
);
710 void ath_beacon_config(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
712 struct ath_beacon_config conf
;
714 /* Setup the beacon configuration parameters */
716 memset(&conf
, 0, sizeof(struct ath_beacon_config
));
717 conf
.beacon_interval
= sc
->hw
->conf
.beacon_int
?
718 sc
->hw
->conf
.beacon_int
: ATH_DEFAULT_BINTVAL
;
719 conf
.listen_interval
= 1;
720 conf
.dtim_period
= conf
.beacon_interval
;
722 conf
.bmiss_timeout
= ATH_DEFAULT_BMISS_LIMIT
* conf
.beacon_interval
;
725 struct ath_vif
*avp
= (struct ath_vif
*)vif
->drv_priv
;
727 switch(avp
->av_opmode
) {
728 case NL80211_IFTYPE_AP
:
729 ath_beacon_config_ap(sc
, &conf
, avp
);
731 case NL80211_IFTYPE_ADHOC
:
732 case NL80211_IFTYPE_MESH_POINT
:
733 ath_beacon_config_adhoc(sc
, &conf
, avp
, vif
);
735 case NL80211_IFTYPE_STATION
:
736 ath_beacon_config_sta(sc
, &conf
, avp
);
739 DPRINTF(sc
, ATH_DBG_CONFIG
,
740 "Unsupported beaconing mode\n");
744 sc
->sc_flags
|= SC_OP_BEACONS
;