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1/*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
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.
7 *
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.
15 */
16
17#include "htc.h"
18
19#define FUDGE 2
20
21void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv)
22{
23 struct ath_hw *ah = priv->ah;
24 struct ath9k_tx_queue_info qi, qi_be;
25
26 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
27 memset(&qi_be, 0, sizeof(struct ath9k_tx_queue_info));
28
29 ath9k_hw_get_txq_props(ah, priv->beacon.beaconq, &qi);
30
31 if (priv->ah->opmode == NL80211_IFTYPE_AP ||
32 priv->ah->opmode == NL80211_IFTYPE_MESH_POINT) {
33 qi.tqi_aifs = 1;
34 qi.tqi_cwmin = 0;
35 qi.tqi_cwmax = 0;
36 } else if (priv->ah->opmode == NL80211_IFTYPE_ADHOC) {
37 int qnum = priv->hwq_map[IEEE80211_AC_BE];
38
39 ath9k_hw_get_txq_props(ah, qnum, &qi_be);
40
41 qi.tqi_aifs = qi_be.tqi_aifs;
42
43 /*
44 * For WIFI Beacon Distribution
45 * Long slot time : 2x cwmin
46 * Short slot time : 4x cwmin
47 */
48 if (ah->slottime == 20)
49 qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
50 else
51 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
52
53 qi.tqi_cwmax = qi_be.tqi_cwmax;
54
55 }
56
57 if (!ath9k_hw_set_txq_props(ah, priv->beacon.beaconq, &qi)) {
58 ath_err(ath9k_hw_common(ah),
59 "Unable to update beacon queue %u!\n", priv->beacon.beaconq);
60 } else {
61 ath9k_hw_resettxqueue(ah, priv->beacon.beaconq);
62 }
63}
64
65/*
66 * Both nexttbtt and intval have to be in usecs.
67 */
68static void ath9k_htc_beacon_init(struct ath9k_htc_priv *priv,
69 struct ath_beacon_config *conf,
70 bool reset_tsf)
71{
72 struct ath_hw *ah = priv->ah;
73 int ret __attribute__ ((unused));
74 __be32 htc_imask = 0;
75 u8 cmd_rsp;
76
77 if (conf->intval >= TU_TO_USEC(DEFAULT_SWBA_RESPONSE))
78 ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
79 else
80 ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
81
82 WMI_CMD(WMI_DISABLE_INTR_CMDID);
83 if (reset_tsf)
84 ath9k_hw_reset_tsf(ah);
85 ath9k_htc_beaconq_config(priv);
86 ath9k_hw_beaconinit(ah, conf->nexttbtt, conf->intval);
87 priv->beacon.bmisscnt = 0;
88 htc_imask = cpu_to_be32(ah->imask);
89 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
90}
91
92static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv,
93 struct ath_beacon_config *bss_conf)
94{
95 struct ath9k_beacon_state bs;
96 enum ath9k_int imask = 0;
97 __be32 htc_imask = 0;
98 int ret __attribute__ ((unused));
99 u8 cmd_rsp;
100
101 if (ath9k_cmn_beacon_config_sta(priv->ah, bss_conf, &bs) == -EPERM)
102 return;
103
104 WMI_CMD(WMI_DISABLE_INTR_CMDID);
105 ath9k_hw_set_sta_beacon_timers(priv->ah, &bs);
106 imask |= ATH9K_INT_BMISS;
107 htc_imask = cpu_to_be32(imask);
108 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
109}
110
111static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv,
112 struct ath_beacon_config *conf)
113{
114 struct ath_hw *ah = priv->ah;
115 ah->imask = 0;
116
117 ath9k_cmn_beacon_config_ap(ah, conf, ATH9K_HTC_MAX_BCN_VIF);
118 ath9k_htc_beacon_init(priv, conf, false);
119}
120
121static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
122 struct ath_beacon_config *conf)
123{
124 struct ath_hw *ah = priv->ah;
125 ah->imask = 0;
126
127 ath9k_cmn_beacon_config_adhoc(ah, conf);
128 ath9k_htc_beacon_init(priv, conf, conf->ibss_creator);
129}
130
131void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
132 enum htc_endpoint_id ep_id, bool txok)
133{
134 dev_kfree_skb_any(skb);
135}
136
137static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv,
138 int slot)
139{
140 struct ath_common *common = ath9k_hw_common(priv->ah);
141 struct ieee80211_vif *vif;
142 struct sk_buff *skb;
143 struct ieee80211_hdr *hdr;
144 int padpos, padsize, ret, tx_slot;
145
146 spin_lock_bh(&priv->beacon_lock);
147
148 vif = priv->beacon.bslot[slot];
149
150 skb = ieee80211_get_buffered_bc(priv->hw, vif);
151
152 while(skb) {
153 hdr = (struct ieee80211_hdr *) skb->data;
154
155 padpos = ieee80211_hdrlen(hdr->frame_control);
156 padsize = padpos & 3;
157 if (padsize && skb->len > padpos) {
158 if (skb_headroom(skb) < padsize) {
159 dev_kfree_skb_any(skb);
160 goto next;
161 }
162 skb_push(skb, padsize);
163 memmove(skb->data, skb->data + padsize, padpos);
164 }
165
166 tx_slot = ath9k_htc_tx_get_slot(priv);
167 if (tx_slot < 0) {
168 ath_dbg(common, XMIT, "No free CAB slot\n");
169 dev_kfree_skb_any(skb);
170 goto next;
171 }
172
173 ret = ath9k_htc_tx_start(priv, NULL, skb, tx_slot, true);
174 if (ret != 0) {
175 ath9k_htc_tx_clear_slot(priv, tx_slot);
176 dev_kfree_skb_any(skb);
177
178 ath_dbg(common, XMIT, "Failed to send CAB frame\n");
179 } else {
180 spin_lock_bh(&priv->tx.tx_lock);
181 priv->tx.queued_cnt++;
182 spin_unlock_bh(&priv->tx.tx_lock);
183 }
184 next:
185 skb = ieee80211_get_buffered_bc(priv->hw, vif);
186 }
187
188 spin_unlock_bh(&priv->beacon_lock);
189}
190
191static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
192 int slot)
193{
194 struct ath_common *common = ath9k_hw_common(priv->ah);
195 struct ieee80211_vif *vif;
196 struct ath9k_htc_vif *avp;
197 struct tx_beacon_header beacon_hdr;
198 struct ath9k_htc_tx_ctl *tx_ctl;
199 struct ieee80211_tx_info *info;
200 struct ieee80211_mgmt *mgmt;
201 struct sk_buff *beacon;
202 u8 *tx_fhdr;
203 int ret;
204
205 memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
206
207 spin_lock_bh(&priv->beacon_lock);
208
209 vif = priv->beacon.bslot[slot];
210 avp = (struct ath9k_htc_vif *)vif->drv_priv;
211
212 if (unlikely(test_bit(ATH_OP_SCANNING, &common->op_flags))) {
213 spin_unlock_bh(&priv->beacon_lock);
214 return;
215 }
216
217 /* Get a new beacon */
218 beacon = ieee80211_beacon_get(priv->hw, vif, 0);
219 if (!beacon) {
220 spin_unlock_bh(&priv->beacon_lock);
221 return;
222 }
223
224 /*
225 * Update the TSF adjust value here, the HW will
226 * add this value for every beacon.
227 */
228 mgmt = (struct ieee80211_mgmt *)beacon->data;
229 mgmt->u.beacon.timestamp = avp->tsfadjust;
230
231 info = IEEE80211_SKB_CB(beacon);
232 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
233 struct ieee80211_hdr *hdr =
234 (struct ieee80211_hdr *) beacon->data;
235 avp->seq_no += 0x10;
236 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
237 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
238 }
239
240 tx_ctl = HTC_SKB_CB(beacon);
241 memset(tx_ctl, 0, sizeof(*tx_ctl));
242
243 tx_ctl->type = ATH9K_HTC_BEACON;
244 tx_ctl->epid = priv->beacon_ep;
245
246 beacon_hdr.vif_index = avp->index;
247 tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
248 memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
249
250 ret = htc_send(priv->htc, beacon);
251 if (ret != 0) {
252 if (ret == -ENOMEM) {
253 ath_dbg(common, BSTUCK,
254 "Failed to send beacon, no free TX buffer\n");
255 }
256 dev_kfree_skb_any(beacon);
257 }
258
259 spin_unlock_bh(&priv->beacon_lock);
260
261 ath9k_htc_csa_is_finished(priv);
262}
263
264static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
265 struct wmi_event_swba *swba)
266{
267 struct ath_common *common = ath9k_hw_common(priv->ah);
268 u64 tsf;
269 u32 tsftu;
270 u16 intval;
271 int slot;
272
273 intval = priv->cur_beacon_conf.beacon_interval;
274
275 tsf = be64_to_cpu(swba->tsf);
276 tsftu = TSF_TO_TU(tsf >> 32, tsf);
277 slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
278 slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
279
280 ath_dbg(common, BEACON,
281 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
282 slot, tsf, tsftu, intval);
283
284 return slot;
285}
286
287void ath9k_htc_swba(struct ath9k_htc_priv *priv,
288 struct wmi_event_swba *swba)
289{
290 struct ath_common *common = ath9k_hw_common(priv->ah);
291 int slot;
292
293 if (swba->beacon_pending != 0) {
294 priv->beacon.bmisscnt++;
295 if (priv->beacon.bmisscnt > BSTUCK_THRESHOLD) {
296 ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n");
297 ieee80211_queue_work(priv->hw,
298 &priv->fatal_work);
299 }
300 return;
301 }
302
303 if (priv->beacon.bmisscnt) {
304 ath_dbg(common, BSTUCK,
305 "Resuming beacon xmit after %u misses\n",
306 priv->beacon.bmisscnt);
307 priv->beacon.bmisscnt = 0;
308 }
309
310 slot = ath9k_htc_choose_bslot(priv, swba);
311 spin_lock_bh(&priv->beacon_lock);
312 if (priv->beacon.bslot[slot] == NULL) {
313 spin_unlock_bh(&priv->beacon_lock);
314 return;
315 }
316 spin_unlock_bh(&priv->beacon_lock);
317
318 ath9k_htc_send_buffered(priv, slot);
319 ath9k_htc_send_beacon(priv, slot);
320}
321
322void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
323 struct ieee80211_vif *vif)
324{
325 struct ath_common *common = ath9k_hw_common(priv->ah);
326 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
327 int i = 0;
328
329 spin_lock_bh(&priv->beacon_lock);
330 for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
331 if (priv->beacon.bslot[i] == NULL) {
332 avp->bslot = i;
333 break;
334 }
335 }
336
337 priv->beacon.bslot[avp->bslot] = vif;
338 spin_unlock_bh(&priv->beacon_lock);
339
340 ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
341 avp->bslot);
342}
343
344void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
345 struct ieee80211_vif *vif)
346{
347 struct ath_common *common = ath9k_hw_common(priv->ah);
348 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
349
350 spin_lock_bh(&priv->beacon_lock);
351 priv->beacon.bslot[avp->bslot] = NULL;
352 spin_unlock_bh(&priv->beacon_lock);
353
354 ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n",
355 avp->bslot);
356}
357
358/*
359 * Calculate the TSF adjustment value for all slots
360 * other than zero.
361 */
362void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
363 struct ieee80211_vif *vif)
364{
365 struct ath_common *common = ath9k_hw_common(priv->ah);
366 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
367 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
368 u64 tsfadjust;
369
370 if (avp->bslot == 0)
371 return;
372
373 /*
374 * The beacon interval cannot be different for multi-AP mode,
375 * and we reach here only for VIF slots greater than zero,
376 * so beacon_interval is guaranteed to be set in cur_conf.
377 */
378 tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
379 avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
380
381 ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
382 (unsigned long long)tsfadjust, avp->bslot);
383}
384
385static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
386{
387 bool *beacon_configured = data;
388 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
389
390 if (vif->type == NL80211_IFTYPE_STATION &&
391 avp->beacon_configured)
392 *beacon_configured = true;
393}
394
395static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
396 struct ieee80211_vif *vif)
397{
398 struct ath_common *common = ath9k_hw_common(priv->ah);
399 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
400 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
401 bool beacon_configured;
402
403 /*
404 * Changing the beacon interval when multiple AP interfaces
405 * are configured will affect beacon transmission of all
406 * of them.
407 */
408 if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
409 (priv->num_ap_vif > 1) &&
410 (vif->type == NL80211_IFTYPE_AP) &&
411 (cur_conf->beacon_interval != bss_conf->beacon_int)) {
412 ath_dbg(common, CONFIG,
413 "Changing beacon interval of multiple AP interfaces !\n");
414 return false;
415 }
416
417 /*
418 * If the HW is operating in AP mode, any new station interfaces that
419 * are added cannot change the beacon parameters.
420 */
421 if (priv->num_ap_vif &&
422 (vif->type != NL80211_IFTYPE_AP)) {
423 ath_dbg(common, CONFIG,
424 "HW in AP mode, cannot set STA beacon parameters\n");
425 return false;
426 }
427
428 /*
429 * The beacon parameters are configured only for the first
430 * station interface.
431 */
432 if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
433 (priv->num_sta_vif > 1) &&
434 (vif->type == NL80211_IFTYPE_STATION)) {
435 beacon_configured = false;
436 ieee80211_iterate_active_interfaces_atomic(
437 priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
438 ath9k_htc_beacon_iter, &beacon_configured);
439
440 if (beacon_configured) {
441 ath_dbg(common, CONFIG,
442 "Beacon already configured for a station interface\n");
443 return false;
444 }
445 }
446
447 return true;
448}
449
450void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
451 struct ieee80211_vif *vif)
452{
453 struct ath_common *common = ath9k_hw_common(priv->ah);
454 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
455 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
456 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
457
458 if (!ath9k_htc_check_beacon_config(priv, vif))
459 return;
460
461 cur_conf->beacon_interval = bss_conf->beacon_int;
462 if (cur_conf->beacon_interval == 0)
463 cur_conf->beacon_interval = 100;
464
465 cur_conf->dtim_period = bss_conf->dtim_period;
466 cur_conf->bmiss_timeout =
467 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
468
469 switch (vif->type) {
470 case NL80211_IFTYPE_STATION:
471 ath9k_htc_beacon_config_sta(priv, cur_conf);
472 avp->beacon_configured = true;
473 break;
474 case NL80211_IFTYPE_ADHOC:
475 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
476 break;
477 case NL80211_IFTYPE_MESH_POINT:
478 case NL80211_IFTYPE_AP:
479 ath9k_htc_beacon_config_ap(priv, cur_conf);
480 break;
481 default:
482 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
483 return;
484 }
485}
486
487void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
488{
489 struct ath_common *common = ath9k_hw_common(priv->ah);
490 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
491
492 switch (priv->ah->opmode) {
493 case NL80211_IFTYPE_STATION:
494 ath9k_htc_beacon_config_sta(priv, cur_conf);
495 break;
496 case NL80211_IFTYPE_ADHOC:
497 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
498 break;
499 case NL80211_IFTYPE_MESH_POINT:
500 case NL80211_IFTYPE_AP:
501 ath9k_htc_beacon_config_ap(priv, cur_conf);
502 break;
503 default:
504 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
505 return;
506 }
507}
508
509bool ath9k_htc_csa_is_finished(struct ath9k_htc_priv *priv)
510{
511 struct ieee80211_vif *vif;
512
513 vif = priv->csa_vif;
514 if (!vif || !vif->bss_conf.csa_active)
515 return false;
516
517 if (!ieee80211_beacon_cntdwn_is_complete(vif))
518 return false;
519
520 ieee80211_csa_finish(vif);
521
522 priv->csa_vif = NULL;
523 return true;
524}
1/*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
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.
7 *
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.
15 */
16
17#include "htc.h"
18
19#define FUDGE 2
20
21void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv)
22{
23 struct ath_hw *ah = priv->ah;
24 struct ath9k_tx_queue_info qi, qi_be;
25
26 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
27 memset(&qi_be, 0, sizeof(struct ath9k_tx_queue_info));
28
29 ath9k_hw_get_txq_props(ah, priv->beaconq, &qi);
30
31 if (priv->ah->opmode == NL80211_IFTYPE_AP) {
32 qi.tqi_aifs = 1;
33 qi.tqi_cwmin = 0;
34 qi.tqi_cwmax = 0;
35 } else if (priv->ah->opmode == NL80211_IFTYPE_ADHOC) {
36 int qnum = priv->hwq_map[WME_AC_BE];
37
38 ath9k_hw_get_txq_props(ah, qnum, &qi_be);
39
40 qi.tqi_aifs = qi_be.tqi_aifs;
41
42 /*
43 * For WIFI Beacon Distribution
44 * Long slot time : 2x cwmin
45 * Short slot time : 4x cwmin
46 */
47 if (ah->slottime == ATH9K_SLOT_TIME_20)
48 qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
49 else
50 qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
51
52 qi.tqi_cwmax = qi_be.tqi_cwmax;
53
54 }
55
56 if (!ath9k_hw_set_txq_props(ah, priv->beaconq, &qi)) {
57 ath_err(ath9k_hw_common(ah),
58 "Unable to update beacon queue %u!\n", priv->beaconq);
59 } else {
60 ath9k_hw_resettxqueue(ah, priv->beaconq);
61 }
62}
63
64
65static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv,
66 struct htc_beacon_config *bss_conf)
67{
68 struct ath_common *common = ath9k_hw_common(priv->ah);
69 struct ath9k_beacon_state bs;
70 enum ath9k_int imask = 0;
71 int dtimperiod, dtimcount, sleepduration;
72 int cfpperiod, cfpcount, bmiss_timeout;
73 u32 nexttbtt = 0, intval, tsftu;
74 __be32 htc_imask = 0;
75 u64 tsf;
76 int num_beacons, offset, dtim_dec_count, cfp_dec_count;
77 int ret __attribute__ ((unused));
78 u8 cmd_rsp;
79
80 memset(&bs, 0, sizeof(bs));
81
82 intval = bss_conf->beacon_interval;
83 bmiss_timeout = (ATH_DEFAULT_BMISS_LIMIT * bss_conf->beacon_interval);
84
85 /*
86 * Setup dtim and cfp parameters according to
87 * last beacon we received (which may be none).
88 */
89 dtimperiod = bss_conf->dtim_period;
90 if (dtimperiod <= 0) /* NB: 0 if not known */
91 dtimperiod = 1;
92 dtimcount = 1;
93 if (dtimcount >= dtimperiod) /* NB: sanity check */
94 dtimcount = 0;
95 cfpperiod = 1; /* NB: no PCF support yet */
96 cfpcount = 0;
97
98 sleepduration = intval;
99 if (sleepduration <= 0)
100 sleepduration = intval;
101
102 /*
103 * Pull nexttbtt forward to reflect the current
104 * TSF and calculate dtim+cfp state for the result.
105 */
106 tsf = ath9k_hw_gettsf64(priv->ah);
107 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
108
109 num_beacons = tsftu / intval + 1;
110 offset = tsftu % intval;
111 nexttbtt = tsftu - offset;
112 if (offset)
113 nexttbtt += intval;
114
115 /* DTIM Beacon every dtimperiod Beacon */
116 dtim_dec_count = num_beacons % dtimperiod;
117 /* CFP every cfpperiod DTIM Beacon */
118 cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
119 if (dtim_dec_count)
120 cfp_dec_count++;
121
122 dtimcount -= dtim_dec_count;
123 if (dtimcount < 0)
124 dtimcount += dtimperiod;
125
126 cfpcount -= cfp_dec_count;
127 if (cfpcount < 0)
128 cfpcount += cfpperiod;
129
130 bs.bs_intval = intval;
131 bs.bs_nexttbtt = nexttbtt;
132 bs.bs_dtimperiod = dtimperiod*intval;
133 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
134 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
135 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
136 bs.bs_cfpmaxduration = 0;
137
138 /*
139 * Calculate the number of consecutive beacons to miss* before taking
140 * a BMISS interrupt. The configuration is specified in TU so we only
141 * need calculate based on the beacon interval. Note that we clamp the
142 * result to at most 15 beacons.
143 */
144 if (sleepduration > intval) {
145 bs.bs_bmissthreshold = ATH_DEFAULT_BMISS_LIMIT / 2;
146 } else {
147 bs.bs_bmissthreshold = DIV_ROUND_UP(bmiss_timeout, intval);
148 if (bs.bs_bmissthreshold > 15)
149 bs.bs_bmissthreshold = 15;
150 else if (bs.bs_bmissthreshold <= 0)
151 bs.bs_bmissthreshold = 1;
152 }
153
154 /*
155 * Calculate sleep duration. The configuration is given in ms.
156 * We ensure a multiple of the beacon period is used. Also, if the sleep
157 * duration is greater than the DTIM period then it makes senses
158 * to make it a multiple of that.
159 *
160 * XXX fixed at 100ms
161 */
162
163 bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
164 if (bs.bs_sleepduration > bs.bs_dtimperiod)
165 bs.bs_sleepduration = bs.bs_dtimperiod;
166
167 /* TSF out of range threshold fixed at 1 second */
168 bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
169
170 ath_dbg(common, CONFIG, "intval: %u tsf: %llu tsftu: %u\n",
171 intval, tsf, tsftu);
172 ath_dbg(common, CONFIG,
173 "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
174 bs.bs_bmissthreshold, bs.bs_sleepduration,
175 bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
176
177 /* Set the computed STA beacon timers */
178
179 WMI_CMD(WMI_DISABLE_INTR_CMDID);
180 ath9k_hw_set_sta_beacon_timers(priv->ah, &bs);
181 imask |= ATH9K_INT_BMISS;
182 htc_imask = cpu_to_be32(imask);
183 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
184}
185
186static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv,
187 struct htc_beacon_config *bss_conf)
188{
189 struct ath_common *common = ath9k_hw_common(priv->ah);
190 enum ath9k_int imask = 0;
191 u32 nexttbtt, intval, tsftu;
192 __be32 htc_imask = 0;
193 int ret __attribute__ ((unused));
194 u8 cmd_rsp;
195 u64 tsf;
196
197 intval = bss_conf->beacon_interval;
198 intval /= ATH9K_HTC_MAX_BCN_VIF;
199 nexttbtt = intval;
200
201 /*
202 * To reduce beacon misses under heavy TX load,
203 * set the beacon response time to a larger value.
204 */
205 if (intval > DEFAULT_SWBA_RESPONSE)
206 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
207 else
208 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
209
210 if (priv->op_flags & OP_TSF_RESET) {
211 ath9k_hw_reset_tsf(priv->ah);
212 priv->op_flags &= ~OP_TSF_RESET;
213 } else {
214 /*
215 * Pull nexttbtt forward to reflect the current TSF.
216 */
217 tsf = ath9k_hw_gettsf64(priv->ah);
218 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
219 do {
220 nexttbtt += intval;
221 } while (nexttbtt < tsftu);
222 }
223
224 if (priv->op_flags & OP_ENABLE_BEACON)
225 imask |= ATH9K_INT_SWBA;
226
227 ath_dbg(common, CONFIG,
228 "AP Beacon config, intval: %d, nexttbtt: %u, resp_time: %d imask: 0x%x\n",
229 bss_conf->beacon_interval, nexttbtt,
230 priv->ah->config.sw_beacon_response_time, imask);
231
232 ath9k_htc_beaconq_config(priv);
233
234 WMI_CMD(WMI_DISABLE_INTR_CMDID);
235 ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
236 priv->cur_beacon_conf.bmiss_cnt = 0;
237 htc_imask = cpu_to_be32(imask);
238 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
239}
240
241static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
242 struct htc_beacon_config *bss_conf)
243{
244 struct ath_common *common = ath9k_hw_common(priv->ah);
245 enum ath9k_int imask = 0;
246 u32 nexttbtt, intval, tsftu;
247 __be32 htc_imask = 0;
248 int ret __attribute__ ((unused));
249 u8 cmd_rsp;
250 u64 tsf;
251
252 intval = bss_conf->beacon_interval;
253 nexttbtt = intval;
254
255 /*
256 * Pull nexttbtt forward to reflect the current TSF.
257 */
258 tsf = ath9k_hw_gettsf64(priv->ah);
259 tsftu = TSF_TO_TU(tsf >> 32, tsf) + FUDGE;
260 do {
261 nexttbtt += intval;
262 } while (nexttbtt < tsftu);
263
264 /*
265 * Only one IBSS interfce is allowed.
266 */
267 if (intval > DEFAULT_SWBA_RESPONSE)
268 priv->ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE;
269 else
270 priv->ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE;
271
272 if (priv->op_flags & OP_ENABLE_BEACON)
273 imask |= ATH9K_INT_SWBA;
274
275 ath_dbg(common, CONFIG,
276 "IBSS Beacon config, intval: %d, nexttbtt: %u, resp_time: %d, imask: 0x%x\n",
277 bss_conf->beacon_interval, nexttbtt,
278 priv->ah->config.sw_beacon_response_time, imask);
279
280 WMI_CMD(WMI_DISABLE_INTR_CMDID);
281 ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
282 priv->cur_beacon_conf.bmiss_cnt = 0;
283 htc_imask = cpu_to_be32(imask);
284 WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
285}
286
287void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
288 enum htc_endpoint_id ep_id, bool txok)
289{
290 dev_kfree_skb_any(skb);
291}
292
293static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv,
294 int slot)
295{
296 struct ath_common *common = ath9k_hw_common(priv->ah);
297 struct ieee80211_vif *vif;
298 struct sk_buff *skb;
299 struct ieee80211_hdr *hdr;
300 int padpos, padsize, ret, tx_slot;
301
302 spin_lock_bh(&priv->beacon_lock);
303
304 vif = priv->cur_beacon_conf.bslot[slot];
305
306 skb = ieee80211_get_buffered_bc(priv->hw, vif);
307
308 while(skb) {
309 hdr = (struct ieee80211_hdr *) skb->data;
310
311 padpos = ath9k_cmn_padpos(hdr->frame_control);
312 padsize = padpos & 3;
313 if (padsize && skb->len > padpos) {
314 if (skb_headroom(skb) < padsize) {
315 dev_kfree_skb_any(skb);
316 goto next;
317 }
318 skb_push(skb, padsize);
319 memmove(skb->data, skb->data + padsize, padpos);
320 }
321
322 tx_slot = ath9k_htc_tx_get_slot(priv);
323 if (tx_slot < 0) {
324 ath_dbg(common, XMIT, "No free CAB slot\n");
325 dev_kfree_skb_any(skb);
326 goto next;
327 }
328
329 ret = ath9k_htc_tx_start(priv, skb, tx_slot, true);
330 if (ret != 0) {
331 ath9k_htc_tx_clear_slot(priv, tx_slot);
332 dev_kfree_skb_any(skb);
333
334 ath_dbg(common, XMIT, "Failed to send CAB frame\n");
335 } else {
336 spin_lock_bh(&priv->tx.tx_lock);
337 priv->tx.queued_cnt++;
338 spin_unlock_bh(&priv->tx.tx_lock);
339 }
340 next:
341 skb = ieee80211_get_buffered_bc(priv->hw, vif);
342 }
343
344 spin_unlock_bh(&priv->beacon_lock);
345}
346
347static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
348 int slot)
349{
350 struct ath_common *common = ath9k_hw_common(priv->ah);
351 struct ieee80211_vif *vif;
352 struct ath9k_htc_vif *avp;
353 struct tx_beacon_header beacon_hdr;
354 struct ath9k_htc_tx_ctl *tx_ctl;
355 struct ieee80211_tx_info *info;
356 struct ieee80211_mgmt *mgmt;
357 struct sk_buff *beacon;
358 u8 *tx_fhdr;
359 int ret;
360
361 memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
362
363 spin_lock_bh(&priv->beacon_lock);
364
365 vif = priv->cur_beacon_conf.bslot[slot];
366 avp = (struct ath9k_htc_vif *)vif->drv_priv;
367
368 if (unlikely(priv->op_flags & OP_SCANNING)) {
369 spin_unlock_bh(&priv->beacon_lock);
370 return;
371 }
372
373 /* Get a new beacon */
374 beacon = ieee80211_beacon_get(priv->hw, vif);
375 if (!beacon) {
376 spin_unlock_bh(&priv->beacon_lock);
377 return;
378 }
379
380 /*
381 * Update the TSF adjust value here, the HW will
382 * add this value for every beacon.
383 */
384 mgmt = (struct ieee80211_mgmt *)beacon->data;
385 mgmt->u.beacon.timestamp = avp->tsfadjust;
386
387 info = IEEE80211_SKB_CB(beacon);
388 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
389 struct ieee80211_hdr *hdr =
390 (struct ieee80211_hdr *) beacon->data;
391 avp->seq_no += 0x10;
392 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
393 hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
394 }
395
396 tx_ctl = HTC_SKB_CB(beacon);
397 memset(tx_ctl, 0, sizeof(*tx_ctl));
398
399 tx_ctl->type = ATH9K_HTC_BEACON;
400 tx_ctl->epid = priv->beacon_ep;
401
402 beacon_hdr.vif_index = avp->index;
403 tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
404 memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
405
406 ret = htc_send(priv->htc, beacon);
407 if (ret != 0) {
408 if (ret == -ENOMEM) {
409 ath_dbg(common, BSTUCK,
410 "Failed to send beacon, no free TX buffer\n");
411 }
412 dev_kfree_skb_any(beacon);
413 }
414
415 spin_unlock_bh(&priv->beacon_lock);
416}
417
418static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
419 struct wmi_event_swba *swba)
420{
421 struct ath_common *common = ath9k_hw_common(priv->ah);
422 u64 tsf;
423 u32 tsftu;
424 u16 intval;
425 int slot;
426
427 intval = priv->cur_beacon_conf.beacon_interval;
428
429 tsf = be64_to_cpu(swba->tsf);
430 tsftu = TSF_TO_TU(tsf >> 32, tsf);
431 slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
432 slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
433
434 ath_dbg(common, BEACON,
435 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
436 slot, tsf, tsftu, intval);
437
438 return slot;
439}
440
441void ath9k_htc_swba(struct ath9k_htc_priv *priv,
442 struct wmi_event_swba *swba)
443{
444 struct ath_common *common = ath9k_hw_common(priv->ah);
445 int slot;
446
447 if (swba->beacon_pending != 0) {
448 priv->cur_beacon_conf.bmiss_cnt++;
449 if (priv->cur_beacon_conf.bmiss_cnt > BSTUCK_THRESHOLD) {
450 ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n");
451 ieee80211_queue_work(priv->hw,
452 &priv->fatal_work);
453 }
454 return;
455 }
456
457 if (priv->cur_beacon_conf.bmiss_cnt) {
458 ath_dbg(common, BSTUCK,
459 "Resuming beacon xmit after %u misses\n",
460 priv->cur_beacon_conf.bmiss_cnt);
461 priv->cur_beacon_conf.bmiss_cnt = 0;
462 }
463
464 slot = ath9k_htc_choose_bslot(priv, swba);
465 spin_lock_bh(&priv->beacon_lock);
466 if (priv->cur_beacon_conf.bslot[slot] == NULL) {
467 spin_unlock_bh(&priv->beacon_lock);
468 return;
469 }
470 spin_unlock_bh(&priv->beacon_lock);
471
472 ath9k_htc_send_buffered(priv, slot);
473 ath9k_htc_send_beacon(priv, slot);
474}
475
476void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
477 struct ieee80211_vif *vif)
478{
479 struct ath_common *common = ath9k_hw_common(priv->ah);
480 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
481 int i = 0;
482
483 spin_lock_bh(&priv->beacon_lock);
484 for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
485 if (priv->cur_beacon_conf.bslot[i] == NULL) {
486 avp->bslot = i;
487 break;
488 }
489 }
490
491 priv->cur_beacon_conf.bslot[avp->bslot] = vif;
492 spin_unlock_bh(&priv->beacon_lock);
493
494 ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
495 avp->bslot);
496}
497
498void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
499 struct ieee80211_vif *vif)
500{
501 struct ath_common *common = ath9k_hw_common(priv->ah);
502 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
503
504 spin_lock_bh(&priv->beacon_lock);
505 priv->cur_beacon_conf.bslot[avp->bslot] = NULL;
506 spin_unlock_bh(&priv->beacon_lock);
507
508 ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n",
509 avp->bslot);
510}
511
512/*
513 * Calculate the TSF adjustment value for all slots
514 * other than zero.
515 */
516void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
517 struct ieee80211_vif *vif)
518{
519 struct ath_common *common = ath9k_hw_common(priv->ah);
520 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
521 struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
522 u64 tsfadjust;
523
524 if (avp->bslot == 0)
525 return;
526
527 /*
528 * The beacon interval cannot be different for multi-AP mode,
529 * and we reach here only for VIF slots greater than zero,
530 * so beacon_interval is guaranteed to be set in cur_conf.
531 */
532 tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
533 avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
534
535 ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
536 (unsigned long long)tsfadjust, avp->bslot);
537}
538
539static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
540{
541 bool *beacon_configured = (bool *)data;
542 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
543
544 if (vif->type == NL80211_IFTYPE_STATION &&
545 avp->beacon_configured)
546 *beacon_configured = true;
547}
548
549static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
550 struct ieee80211_vif *vif)
551{
552 struct ath_common *common = ath9k_hw_common(priv->ah);
553 struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
554 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
555 bool beacon_configured;
556
557 /*
558 * Changing the beacon interval when multiple AP interfaces
559 * are configured will affect beacon transmission of all
560 * of them.
561 */
562 if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
563 (priv->num_ap_vif > 1) &&
564 (vif->type == NL80211_IFTYPE_AP) &&
565 (cur_conf->beacon_interval != bss_conf->beacon_int)) {
566 ath_dbg(common, CONFIG,
567 "Changing beacon interval of multiple AP interfaces !\n");
568 return false;
569 }
570
571 /*
572 * If the HW is operating in AP mode, any new station interfaces that
573 * are added cannot change the beacon parameters.
574 */
575 if (priv->num_ap_vif &&
576 (vif->type != NL80211_IFTYPE_AP)) {
577 ath_dbg(common, CONFIG,
578 "HW in AP mode, cannot set STA beacon parameters\n");
579 return false;
580 }
581
582 /*
583 * The beacon parameters are configured only for the first
584 * station interface.
585 */
586 if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
587 (priv->num_sta_vif > 1) &&
588 (vif->type == NL80211_IFTYPE_STATION)) {
589 beacon_configured = false;
590 ieee80211_iterate_active_interfaces_atomic(priv->hw,
591 ath9k_htc_beacon_iter,
592 &beacon_configured);
593
594 if (beacon_configured) {
595 ath_dbg(common, CONFIG,
596 "Beacon already configured for a station interface\n");
597 return false;
598 }
599 }
600
601 return true;
602}
603
604void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
605 struct ieee80211_vif *vif)
606{
607 struct ath_common *common = ath9k_hw_common(priv->ah);
608 struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
609 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
610 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
611
612 if (!ath9k_htc_check_beacon_config(priv, vif))
613 return;
614
615 cur_conf->beacon_interval = bss_conf->beacon_int;
616 if (cur_conf->beacon_interval == 0)
617 cur_conf->beacon_interval = 100;
618
619 cur_conf->dtim_period = bss_conf->dtim_period;
620 cur_conf->bmiss_timeout =
621 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
622
623 switch (vif->type) {
624 case NL80211_IFTYPE_STATION:
625 ath9k_htc_beacon_config_sta(priv, cur_conf);
626 avp->beacon_configured = true;
627 break;
628 case NL80211_IFTYPE_ADHOC:
629 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
630 break;
631 case NL80211_IFTYPE_AP:
632 ath9k_htc_beacon_config_ap(priv, cur_conf);
633 break;
634 default:
635 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
636 return;
637 }
638}
639
640void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
641{
642 struct ath_common *common = ath9k_hw_common(priv->ah);
643 struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
644
645 switch (priv->ah->opmode) {
646 case NL80211_IFTYPE_STATION:
647 ath9k_htc_beacon_config_sta(priv, cur_conf);
648 break;
649 case NL80211_IFTYPE_ADHOC:
650 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
651 break;
652 case NL80211_IFTYPE_AP:
653 ath9k_htc_beacon_config_ap(priv, cur_conf);
654 break;
655 default:
656 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
657 return;
658 }
659}