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 int ath_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
);
41 if (sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) {
42 /* Always burst out beacon and CAB traffic. */
47 /* Adhoc mode; important thing is to use 2x cwmin. */
48 txq
= sc
->tx
.txq_map
[WME_AC_BE
];
49 ath9k_hw_get_txq_props(ah
, txq
->axq_qnum
, &qi_be
);
50 qi
.tqi_aifs
= qi_be
.tqi_aifs
;
51 qi
.tqi_cwmin
= 4*qi_be
.tqi_cwmin
;
52 qi
.tqi_cwmax
= qi_be
.tqi_cwmax
;
55 if (!ath9k_hw_set_txq_props(ah
, sc
->beacon
.beaconq
, &qi
)) {
57 "Unable to update h/w beacon queue parameters\n");
60 ath9k_hw_resettxqueue(ah
, sc
->beacon
.beaconq
);
66 * Associates the beacon frame buffer with a transmit descriptor. Will set
67 * up rate codes, and channel flags. Beacons are always sent out at the
68 * lowest rate, and are not retried.
70 static void ath_beacon_setup(struct ath_softc
*sc
, struct ath_vif
*avp
,
71 struct ath_buf
*bf
, int rateidx
)
73 struct sk_buff
*skb
= bf
->bf_mpdu
;
74 struct ath_hw
*ah
= sc
->sc_ah
;
75 struct ath_common
*common
= ath9k_hw_common(ah
);
76 struct ath_tx_info info
;
77 struct ieee80211_supported_band
*sband
;
78 u8 chainmask
= ah
->txchainmask
;
81 ath9k_reset_beacon_status(sc
);
83 sband
= &sc
->sbands
[common
->hw
->conf
.channel
->band
];
84 rate
= sband
->bitrates
[rateidx
].hw_value
;
85 if (sc
->sc_flags
& SC_OP_PREAMBLE_SHORT
)
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
;
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 ath_tx_cabq(struct ieee80211_hw
*hw
, struct sk_buff
*skb
)
113 struct ath_softc
*sc
= hw
->priv
;
114 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
115 struct ath_tx_control txctl
;
117 memset(&txctl
, 0, sizeof(struct ath_tx_control
));
118 txctl
.txq
= sc
->beacon
.cabq
;
120 ath_dbg(common
, ATH_DBG_XMIT
,
121 "transmitting CABQ packet, skb: %p\n", skb
);
123 if (ath_tx_start(hw
, skb
, &txctl
) != 0) {
124 ath_dbg(common
, ATH_DBG_XMIT
, "CABQ TX failed\n");
125 dev_kfree_skb_any(skb
);
129 static struct ath_buf
*ath_beacon_generate(struct ieee80211_hw
*hw
,
130 struct ieee80211_vif
*vif
)
132 struct ath_softc
*sc
= hw
->priv
;
133 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
137 struct ath_txq
*cabq
;
138 struct ieee80211_tx_info
*info
;
141 ath9k_reset_beacon_status(sc
);
143 avp
= (void *)vif
->drv_priv
;
144 cabq
= sc
->beacon
.cabq
;
146 if ((avp
->av_bcbuf
== NULL
) || !avp
->is_bslot_active
)
149 /* Release the old beacon first */
154 dma_unmap_single(sc
->dev
, bf
->bf_buf_addr
,
155 skb
->len
, DMA_TO_DEVICE
);
156 dev_kfree_skb_any(skb
);
160 /* Get a new beacon from mac80211 */
162 skb
= ieee80211_beacon_get(hw
, vif
);
166 ((struct ieee80211_mgmt
*)skb
->data
)->u
.beacon
.timestamp
=
169 info
= IEEE80211_SKB_CB(skb
);
170 if (info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) {
172 * TODO: make sure the seq# gets assigned properly (vs. other
175 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
176 sc
->tx
.seq_no
+= 0x10;
177 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
178 hdr
->seq_ctrl
|= cpu_to_le16(sc
->tx
.seq_no
);
181 bf
->bf_buf_addr
= dma_map_single(sc
->dev
, skb
->data
,
182 skb
->len
, DMA_TO_DEVICE
);
183 if (unlikely(dma_mapping_error(sc
->dev
, bf
->bf_buf_addr
))) {
184 dev_kfree_skb_any(skb
);
187 ath_err(common
, "dma_mapping_error on beaconing\n");
191 skb
= ieee80211_get_buffered_bc(hw
, vif
);
194 * if the CABQ traffic from previous DTIM is pending and the current
195 * beacon is also a DTIM.
196 * 1) if there is only one vif let the cab traffic continue.
197 * 2) if there are more than one vif and we are using staggered
198 * beacons, then drain the cabq by dropping all the frames in
199 * the cabq so that the current vifs cab traffic can be scheduled.
201 spin_lock_bh(&cabq
->axq_lock
);
202 cabq_depth
= cabq
->axq_depth
;
203 spin_unlock_bh(&cabq
->axq_lock
);
205 if (skb
&& cabq_depth
) {
207 ath_dbg(common
, ATH_DBG_BEACON
,
208 "Flushing previous cabq traffic\n");
209 ath_draintxq(sc
, cabq
, false);
213 ath_beacon_setup(sc
, avp
, bf
, info
->control
.rates
[0].idx
);
216 ath_tx_cabq(hw
, skb
);
217 skb
= ieee80211_get_buffered_bc(hw
, vif
);
223 int ath_beacon_alloc(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
225 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
229 struct ath_beacon_config
*cur_conf
= &sc
->cur_beacon_conf
;
232 avp
= (void *)vif
->drv_priv
;
234 /* Allocate a beacon descriptor if we haven't done so. */
235 if (!avp
->av_bcbuf
) {
236 /* Allocate beacon state for hostap/ibss. We know
237 * a buffer is available. */
238 avp
->av_bcbuf
= list_first_entry(&sc
->beacon
.bbuf
,
239 struct ath_buf
, list
);
240 list_del(&avp
->av_bcbuf
->list
);
242 if (ath9k_uses_beacons(vif
->type
)) {
245 * Assign the vif to a beacon xmit slot. As
246 * above, this cannot fail to find one.
249 for (slot
= 0; slot
< ATH_BCBUF
; slot
++)
250 if (sc
->beacon
.bslot
[slot
] == NULL
) {
251 avp
->av_bslot
= slot
;
252 avp
->is_bslot_active
= false;
254 /* NB: keep looking for a double slot */
255 if (slot
== 0 || !sc
->beacon
.bslot
[slot
-1])
258 BUG_ON(sc
->beacon
.bslot
[avp
->av_bslot
] != NULL
);
259 sc
->beacon
.bslot
[avp
->av_bslot
] = vif
;
264 /* release the previous beacon frame, if it already exists. */
266 if (bf
->bf_mpdu
!= NULL
) {
268 dma_unmap_single(sc
->dev
, bf
->bf_buf_addr
,
269 skb
->len
, DMA_TO_DEVICE
);
270 dev_kfree_skb_any(skb
);
275 /* NB: the beacon data buffer must be 32-bit aligned. */
276 skb
= ieee80211_beacon_get(sc
->hw
, vif
);
280 tstamp
= ((struct ieee80211_mgmt
*)skb
->data
)->u
.beacon
.timestamp
;
281 sc
->beacon
.bc_tstamp
= (u32
) le64_to_cpu(tstamp
);
282 /* Calculate a TSF adjustment factor required for staggered beacons. */
283 if (avp
->av_bslot
> 0) {
287 intval
= cur_conf
->beacon_interval
? : ATH_DEFAULT_BINTVAL
;
290 * Calculate the TSF offset for this beacon slot, i.e., the
291 * number of usecs that need to be added to the timestamp field
292 * in Beacon and Probe Response frames. Beacon slot 0 is
293 * processed at the correct offset, so it does not require TSF
294 * adjustment. Other slots are adjusted to get the timestamp
295 * close to the TBTT for the BSS.
297 tsfadjust
= TU_TO_USEC(intval
* avp
->av_bslot
) / ATH_BCBUF
;
298 avp
->tsf_adjust
= cpu_to_le64(tsfadjust
);
300 ath_dbg(common
, ATH_DBG_BEACON
,
301 "stagger beacons, bslot %d intval %u tsfadjust %llu\n",
302 avp
->av_bslot
, intval
, (unsigned long long)tsfadjust
);
304 ((struct ieee80211_mgmt
*)skb
->data
)->u
.beacon
.timestamp
=
307 avp
->tsf_adjust
= cpu_to_le64(0);
310 bf
->bf_buf_addr
= dma_map_single(sc
->dev
, skb
->data
,
311 skb
->len
, DMA_TO_DEVICE
);
312 if (unlikely(dma_mapping_error(sc
->dev
, bf
->bf_buf_addr
))) {
313 dev_kfree_skb_any(skb
);
316 ath_err(common
, "dma_mapping_error on beacon alloc\n");
319 avp
->is_bslot_active
= true;
324 void ath_beacon_return(struct ath_softc
*sc
, struct ath_vif
*avp
)
326 if (avp
->av_bcbuf
!= NULL
) {
329 avp
->is_bslot_active
= false;
330 if (avp
->av_bslot
!= -1) {
331 sc
->beacon
.bslot
[avp
->av_bslot
] = NULL
;
337 if (bf
->bf_mpdu
!= NULL
) {
338 struct sk_buff
*skb
= bf
->bf_mpdu
;
339 dma_unmap_single(sc
->dev
, bf
->bf_buf_addr
,
340 skb
->len
, DMA_TO_DEVICE
);
341 dev_kfree_skb_any(skb
);
345 list_add_tail(&bf
->list
, &sc
->beacon
.bbuf
);
347 avp
->av_bcbuf
= NULL
;
351 void ath_beacon_tasklet(unsigned long data
)
353 struct ath_softc
*sc
= (struct ath_softc
*)data
;
354 struct ath_beacon_config
*cur_conf
= &sc
->cur_beacon_conf
;
355 struct ath_hw
*ah
= sc
->sc_ah
;
356 struct ath_common
*common
= ath9k_hw_common(ah
);
357 struct ath_buf
*bf
= NULL
;
358 struct ieee80211_vif
*vif
;
359 struct ath_tx_status ts
;
364 * Check if the previous beacon has gone out. If
365 * not don't try to post another, skip this period
366 * and wait for the next. Missed beacons indicate
367 * a problem and should not occur. If we miss too
368 * many consecutive beacons reset the device.
370 if (ath9k_hw_numtxpending(ah
, sc
->beacon
.beaconq
) != 0) {
371 sc
->beacon
.bmisscnt
++;
373 if (sc
->beacon
.bmisscnt
< BSTUCK_THRESH
* sc
->nbcnvifs
) {
374 ath_dbg(common
, ATH_DBG_BSTUCK
,
375 "missed %u consecutive beacons\n",
376 sc
->beacon
.bmisscnt
);
377 ath9k_hw_stop_dma_queue(ah
, sc
->beacon
.beaconq
);
378 if (sc
->beacon
.bmisscnt
> 3)
379 ath9k_hw_bstuck_nfcal(ah
);
380 } else if (sc
->beacon
.bmisscnt
>= BSTUCK_THRESH
) {
381 ath_dbg(common
, ATH_DBG_BSTUCK
,
382 "beacon is officially stuck\n");
383 sc
->sc_flags
|= SC_OP_TSF_RESET
;
384 ieee80211_queue_work(sc
->hw
, &sc
->hw_reset_work
);
391 * Generate beacon frames. we are sending frames
392 * staggered so calculate the slot for this frame based
393 * on the tsf to safeguard against missing an swba.
397 if (ah
->opmode
== NL80211_IFTYPE_AP
) {
402 intval
= cur_conf
->beacon_interval
? : ATH_DEFAULT_BINTVAL
;
403 tsf
= ath9k_hw_gettsf64(ah
);
404 tsf
+= TU_TO_USEC(ah
->config
.sw_beacon_response_time
);
405 tsftu
= TSF_TO_TU((tsf
* ATH_BCBUF
) >>32, tsf
* ATH_BCBUF
);
406 slot
= (tsftu
% (intval
* ATH_BCBUF
)) / intval
;
407 vif
= sc
->beacon
.bslot
[slot
];
409 ath_dbg(common
, ATH_DBG_BEACON
,
410 "slot %d [tsf %llu tsftu %u intval %u] vif %p\n",
411 slot
, tsf
, tsftu
/ ATH_BCBUF
, intval
, vif
);
414 vif
= sc
->beacon
.bslot
[slot
];
420 bf
= ath_beacon_generate(sc
->hw
, vif
);
422 bfaddr
= bf
->bf_daddr
;
426 if (sc
->beacon
.bmisscnt
!= 0) {
427 ath_dbg(common
, ATH_DBG_BSTUCK
,
428 "resume beacon xmit after %u misses\n",
429 sc
->beacon
.bmisscnt
);
430 sc
->beacon
.bmisscnt
= 0;
435 * Handle slot time change when a non-ERP station joins/leaves
436 * an 11g network. The 802.11 layer notifies us via callback,
437 * we mark updateslot, then wait one beacon before effecting
438 * the change. This gives associated stations at least one
439 * beacon interval to note the state change.
441 * NB: The slot time change state machine is clocked according
442 * to whether we are bursting or staggering beacons. We
443 * recognize the request to update and record the current
444 * slot then don't transition until that slot is reached
445 * again. If we miss a beacon for that slot then we'll be
446 * slow to transition but we'll be sure at least one beacon
447 * interval has passed. When bursting slot is always left
448 * set to ATH_BCBUF so this check is a noop.
450 if (sc
->beacon
.updateslot
== UPDATE
) {
451 sc
->beacon
.updateslot
= COMMIT
; /* commit next beacon */
452 sc
->beacon
.slotupdate
= slot
;
453 } else if (sc
->beacon
.updateslot
== COMMIT
&& sc
->beacon
.slotupdate
== slot
) {
454 ah
->slottime
= sc
->beacon
.slottime
;
455 ath9k_hw_init_global_settings(ah
);
456 sc
->beacon
.updateslot
= OK
;
459 /* NB: cabq traffic should already be queued and primed */
460 ath9k_hw_puttxbuf(ah
, sc
->beacon
.beaconq
, bfaddr
);
461 ath9k_hw_txstart(ah
, sc
->beacon
.beaconq
);
463 sc
->beacon
.ast_be_xmit
+= bc
; /* XXX per-vif? */
464 if (ah
->caps
.hw_caps
& ATH9K_HW_CAP_EDMA
) {
465 spin_lock_bh(&sc
->sc_pcu_lock
);
466 ath9k_hw_txprocdesc(ah
, bf
->bf_desc
, (void *)&ts
);
467 spin_unlock_bh(&sc
->sc_pcu_lock
);
472 static void ath9k_beacon_init(struct ath_softc
*sc
,
476 if (sc
->sc_flags
& SC_OP_TSF_RESET
) {
478 ath9k_hw_reset_tsf(sc
->sc_ah
);
481 ath9k_hw_beaconinit(sc
->sc_ah
, next_beacon
, beacon_period
);
483 if (sc
->sc_flags
& SC_OP_TSF_RESET
) {
484 ath9k_ps_restore(sc
);
485 sc
->sc_flags
&= ~SC_OP_TSF_RESET
;
490 * For multi-bss ap support beacons are either staggered evenly over N slots or
491 * burst together. For the former arrange for the SWBA to be delivered for each
492 * slot. Slots that are not occupied will generate nothing.
494 static void ath_beacon_config_ap(struct ath_softc
*sc
,
495 struct ath_beacon_config
*conf
)
497 struct ath_hw
*ah
= sc
->sc_ah
;
498 u32 nexttbtt
, intval
;
500 /* NB: the beacon interval is kept internally in TU's */
501 intval
= TU_TO_USEC(conf
->beacon_interval
);
502 intval
/= ATH_BCBUF
; /* for staggered beacons */
506 * In AP mode we enable the beacon timers and SWBA interrupts to
507 * prepare beacon frames.
509 ah
->imask
|= ATH9K_INT_SWBA
;
510 ath_beaconq_config(sc
);
512 /* Set the computed AP beacon timers */
514 ath9k_hw_disable_interrupts(ah
);
515 sc
->sc_flags
|= SC_OP_TSF_RESET
;
516 ath9k_beacon_init(sc
, nexttbtt
, intval
);
517 sc
->beacon
.bmisscnt
= 0;
518 ath9k_hw_set_interrupts(ah
, ah
->imask
);
519 ath9k_hw_enable_interrupts(ah
);
523 * This sets up the beacon timers according to the timestamp of the last
524 * received beacon and the current TSF, configures PCF and DTIM
525 * handling, programs the sleep registers so the hardware will wakeup in
526 * time to receive beacons, and configures the beacon miss handling so
527 * we'll receive a BMISS interrupt when we stop seeing beacons from the AP
528 * we've associated with.
530 static void ath_beacon_config_sta(struct ath_softc
*sc
,
531 struct ath_beacon_config
*conf
)
533 struct ath_hw
*ah
= sc
->sc_ah
;
534 struct ath_common
*common
= ath9k_hw_common(ah
);
535 struct ath9k_beacon_state bs
;
536 int dtimperiod
, dtimcount
, sleepduration
;
537 int cfpperiod
, cfpcount
;
538 u32 nexttbtt
= 0, intval
, tsftu
;
540 int num_beacons
, offset
, dtim_dec_count
, cfp_dec_count
;
542 /* No need to configure beacon if we are not associated */
543 if (!common
->curaid
) {
544 ath_dbg(common
, ATH_DBG_BEACON
,
545 "STA is not yet associated..skipping beacon config\n");
549 memset(&bs
, 0, sizeof(bs
));
550 intval
= conf
->beacon_interval
;
553 * Setup dtim and cfp parameters according to
554 * last beacon we received (which may be none).
556 dtimperiod
= conf
->dtim_period
;
557 dtimcount
= conf
->dtim_count
;
558 if (dtimcount
>= dtimperiod
) /* NB: sanity check */
560 cfpperiod
= 1; /* NB: no PCF support yet */
563 sleepduration
= conf
->listen_interval
* intval
;
566 * Pull nexttbtt forward to reflect the current
567 * TSF and calculate dtim+cfp state for the result.
569 tsf
= ath9k_hw_gettsf64(ah
);
570 tsftu
= TSF_TO_TU(tsf
>>32, tsf
) + FUDGE
;
572 num_beacons
= tsftu
/ intval
+ 1;
573 offset
= tsftu
% intval
;
574 nexttbtt
= tsftu
- offset
;
578 /* DTIM Beacon every dtimperiod Beacon */
579 dtim_dec_count
= num_beacons
% dtimperiod
;
580 /* CFP every cfpperiod DTIM Beacon */
581 cfp_dec_count
= (num_beacons
/ dtimperiod
) % cfpperiod
;
585 dtimcount
-= dtim_dec_count
;
587 dtimcount
+= dtimperiod
;
589 cfpcount
-= cfp_dec_count
;
591 cfpcount
+= cfpperiod
;
593 bs
.bs_intval
= intval
;
594 bs
.bs_nexttbtt
= nexttbtt
;
595 bs
.bs_dtimperiod
= dtimperiod
*intval
;
596 bs
.bs_nextdtim
= bs
.bs_nexttbtt
+ dtimcount
*intval
;
597 bs
.bs_cfpperiod
= cfpperiod
*bs
.bs_dtimperiod
;
598 bs
.bs_cfpnext
= bs
.bs_nextdtim
+ cfpcount
*bs
.bs_dtimperiod
;
599 bs
.bs_cfpmaxduration
= 0;
602 * Calculate the number of consecutive beacons to miss* before taking
603 * a BMISS interrupt. The configuration is specified in TU so we only
604 * need calculate based on the beacon interval. Note that we clamp the
605 * result to at most 15 beacons.
607 if (sleepduration
> intval
) {
608 bs
.bs_bmissthreshold
= conf
->listen_interval
*
609 ATH_DEFAULT_BMISS_LIMIT
/ 2;
611 bs
.bs_bmissthreshold
= DIV_ROUND_UP(conf
->bmiss_timeout
, intval
);
612 if (bs
.bs_bmissthreshold
> 15)
613 bs
.bs_bmissthreshold
= 15;
614 else if (bs
.bs_bmissthreshold
<= 0)
615 bs
.bs_bmissthreshold
= 1;
619 * Calculate sleep duration. The configuration is given in ms.
620 * We ensure a multiple of the beacon period is used. Also, if the sleep
621 * duration is greater than the DTIM period then it makes senses
622 * to make it a multiple of that.
627 bs
.bs_sleepduration
= roundup(IEEE80211_MS_TO_TU(100), sleepduration
);
628 if (bs
.bs_sleepduration
> bs
.bs_dtimperiod
)
629 bs
.bs_sleepduration
= bs
.bs_dtimperiod
;
631 /* TSF out of range threshold fixed at 1 second */
632 bs
.bs_tsfoor_threshold
= ATH9K_TSFOOR_THRESHOLD
;
634 ath_dbg(common
, ATH_DBG_BEACON
, "tsf: %llu tsftu: %u\n", tsf
, tsftu
);
635 ath_dbg(common
, ATH_DBG_BEACON
,
636 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
637 bs
.bs_bmissthreshold
, bs
.bs_sleepduration
,
638 bs
.bs_cfpperiod
, bs
.bs_cfpmaxduration
, bs
.bs_cfpnext
);
640 /* Set the computed STA beacon timers */
642 ath9k_hw_disable_interrupts(ah
);
643 ath9k_hw_set_sta_beacon_timers(ah
, &bs
);
644 ah
->imask
|= ATH9K_INT_BMISS
;
646 ath9k_hw_set_interrupts(ah
, ah
->imask
);
647 ath9k_hw_enable_interrupts(ah
);
650 static void ath_beacon_config_adhoc(struct ath_softc
*sc
,
651 struct ath_beacon_config
*conf
)
653 struct ath_hw
*ah
= sc
->sc_ah
;
654 struct ath_common
*common
= ath9k_hw_common(ah
);
655 u32 tsf
, intval
, nexttbtt
;
657 ath9k_reset_beacon_status(sc
);
659 intval
= TU_TO_USEC(conf
->beacon_interval
);
660 tsf
= roundup(ath9k_hw_gettsf32(ah
) + TU_TO_USEC(FUDGE
), intval
);
661 nexttbtt
= tsf
+ intval
;
663 ath_dbg(common
, ATH_DBG_BEACON
,
664 "IBSS nexttbtt %u intval %u (%u)\n",
665 nexttbtt
, intval
, conf
->beacon_interval
);
668 * In IBSS mode enable the beacon timers but only enable SWBA interrupts
669 * if we need to manually prepare beacon frames. Otherwise we use a
670 * self-linked tx descriptor and let the hardware deal with things.
672 ah
->imask
|= ATH9K_INT_SWBA
;
674 ath_beaconq_config(sc
);
676 /* Set the computed ADHOC beacon timers */
678 ath9k_hw_disable_interrupts(ah
);
679 ath9k_beacon_init(sc
, nexttbtt
, intval
);
680 sc
->beacon
.bmisscnt
= 0;
682 ath9k_hw_set_interrupts(ah
, ah
->imask
);
683 ath9k_hw_enable_interrupts(ah
);
686 static bool ath9k_allow_beacon_config(struct ath_softc
*sc
,
687 struct ieee80211_vif
*vif
)
689 struct ath_beacon_config
*cur_conf
= &sc
->cur_beacon_conf
;
690 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
691 struct ieee80211_bss_conf
*bss_conf
= &vif
->bss_conf
;
692 struct ath_vif
*avp
= (void *)vif
->drv_priv
;
695 * Can not have different beacon interval on multiple
698 if ((sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) &&
699 (sc
->nbcnvifs
> 1) &&
700 (vif
->type
== NL80211_IFTYPE_AP
) &&
701 (cur_conf
->beacon_interval
!= bss_conf
->beacon_int
)) {
702 ath_dbg(common
, ATH_DBG_CONFIG
,
703 "Changing beacon interval of multiple \
708 * Can not configure station vif's beacon config
711 if ((sc
->sc_ah
->opmode
== NL80211_IFTYPE_AP
) &&
712 (vif
->type
!= NL80211_IFTYPE_AP
)) {
713 ath_dbg(common
, ATH_DBG_CONFIG
,
714 "STA vif's beacon not allowed on AP mode\n");
718 * Do not allow beacon config if HW was already configured
719 * with another STA vif
721 if ((sc
->sc_ah
->opmode
== NL80211_IFTYPE_STATION
) &&
722 (vif
->type
== NL80211_IFTYPE_STATION
) &&
723 (sc
->sc_flags
& SC_OP_BEACONS
) &&
724 !avp
->primary_sta_vif
) {
725 ath_dbg(common
, ATH_DBG_CONFIG
,
726 "Beacon already configured for a station interface\n");
732 void ath_beacon_config(struct ath_softc
*sc
, struct ieee80211_vif
*vif
)
734 struct ath_beacon_config
*cur_conf
= &sc
->cur_beacon_conf
;
735 struct ieee80211_bss_conf
*bss_conf
= &vif
->bss_conf
;
737 if (!ath9k_allow_beacon_config(sc
, vif
))
740 /* Setup the beacon configuration parameters */
741 cur_conf
->beacon_interval
= bss_conf
->beacon_int
;
742 cur_conf
->dtim_period
= bss_conf
->dtim_period
;
743 cur_conf
->listen_interval
= 1;
744 cur_conf
->dtim_count
= 1;
745 cur_conf
->bmiss_timeout
=
746 ATH_DEFAULT_BMISS_LIMIT
* cur_conf
->beacon_interval
;
749 * It looks like mac80211 may end up using beacon interval of zero in
750 * some cases (at least for mesh point). Avoid getting into an
751 * infinite loop by using a bit safer value instead. To be safe,
752 * do sanity check on beacon interval for all operating modes.
754 if (cur_conf
->beacon_interval
== 0)
755 cur_conf
->beacon_interval
= 100;
758 * We don't parse dtim period from mac80211 during the driver
759 * initialization as it breaks association with hidden-ssid
760 * AP and it causes latency in roaming
762 if (cur_conf
->dtim_period
== 0)
763 cur_conf
->dtim_period
= 1;
768 static bool ath_has_valid_bslot(struct ath_softc
*sc
)
774 for (slot
= 0; slot
< ATH_BCBUF
; slot
++) {
775 if (sc
->beacon
.bslot
[slot
]) {
776 avp
= (void *)sc
->beacon
.bslot
[slot
]->drv_priv
;
777 if (avp
->is_bslot_active
) {
787 void ath_set_beacon(struct ath_softc
*sc
)
789 struct ath_common
*common
= ath9k_hw_common(sc
->sc_ah
);
790 struct ath_beacon_config
*cur_conf
= &sc
->cur_beacon_conf
;
792 switch (sc
->sc_ah
->opmode
) {
793 case NL80211_IFTYPE_AP
:
794 if (ath_has_valid_bslot(sc
))
795 ath_beacon_config_ap(sc
, cur_conf
);
797 case NL80211_IFTYPE_ADHOC
:
798 case NL80211_IFTYPE_MESH_POINT
:
799 ath_beacon_config_adhoc(sc
, cur_conf
);
801 case NL80211_IFTYPE_STATION
:
802 ath_beacon_config_sta(sc
, cur_conf
);
805 ath_dbg(common
, ATH_DBG_CONFIG
,
806 "Unsupported beaconing mode\n");
810 sc
->sc_flags
|= SC_OP_BEACONS
;
813 void ath9k_set_beaconing_status(struct ath_softc
*sc
, bool status
)
815 struct ath_hw
*ah
= sc
->sc_ah
;
817 if (!ath_has_valid_bslot(sc
))
822 /* Re-enable beaconing */
823 ah
->imask
|= ATH9K_INT_SWBA
;
824 ath9k_hw_set_interrupts(ah
, ah
->imask
);
826 /* Disable SWBA interrupt */
827 ah
->imask
&= ~ATH9K_INT_SWBA
;
828 ath9k_hw_set_interrupts(ah
, ah
->imask
);
829 tasklet_kill(&sc
->bcon_tasklet
);
830 ath9k_hw_stop_dma_queue(ah
, sc
->beacon
.beaconq
);
832 ath9k_ps_restore(sc
);