1
2
3
4
5
6
7
8
9
10
11
12
13
14
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
45
46
47
48 if (ah->slottime == ATH9K_SLOT_TIME_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
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
218 beacon = ieee80211_beacon_get(priv->hw, vif);
219 if (!beacon) {
220 spin_unlock_bh(&priv->beacon_lock);
221 return;
222 }
223
224
225
226
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
262static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv,
263 struct wmi_event_swba *swba)
264{
265 struct ath_common *common = ath9k_hw_common(priv->ah);
266 u64 tsf;
267 u32 tsftu;
268 u16 intval;
269 int slot;
270
271 intval = priv->cur_beacon_conf.beacon_interval;
272
273 tsf = be64_to_cpu(swba->tsf);
274 tsftu = TSF_TO_TU(tsf >> 32, tsf);
275 slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
276 slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
277
278 ath_dbg(common, BEACON,
279 "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
280 slot, tsf, tsftu, intval);
281
282 return slot;
283}
284
285void ath9k_htc_swba(struct ath9k_htc_priv *priv,
286 struct wmi_event_swba *swba)
287{
288 struct ath_common *common = ath9k_hw_common(priv->ah);
289 int slot;
290
291 if (swba->beacon_pending != 0) {
292 priv->beacon.bmisscnt++;
293 if (priv->beacon.bmisscnt > BSTUCK_THRESHOLD) {
294 ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n");
295 ieee80211_queue_work(priv->hw,
296 &priv->fatal_work);
297 }
298 return;
299 }
300
301 if (priv->beacon.bmisscnt) {
302 ath_dbg(common, BSTUCK,
303 "Resuming beacon xmit after %u misses\n",
304 priv->beacon.bmisscnt);
305 priv->beacon.bmisscnt = 0;
306 }
307
308 slot = ath9k_htc_choose_bslot(priv, swba);
309 spin_lock_bh(&priv->beacon_lock);
310 if (priv->beacon.bslot[slot] == NULL) {
311 spin_unlock_bh(&priv->beacon_lock);
312 return;
313 }
314 spin_unlock_bh(&priv->beacon_lock);
315
316 ath9k_htc_send_buffered(priv, slot);
317 ath9k_htc_send_beacon(priv, slot);
318}
319
320void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
321 struct ieee80211_vif *vif)
322{
323 struct ath_common *common = ath9k_hw_common(priv->ah);
324 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
325 int i = 0;
326
327 spin_lock_bh(&priv->beacon_lock);
328 for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
329 if (priv->beacon.bslot[i] == NULL) {
330 avp->bslot = i;
331 break;
332 }
333 }
334
335 priv->beacon.bslot[avp->bslot] = vif;
336 spin_unlock_bh(&priv->beacon_lock);
337
338 ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
339 avp->bslot);
340}
341
342void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
343 struct ieee80211_vif *vif)
344{
345 struct ath_common *common = ath9k_hw_common(priv->ah);
346 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
347
348 spin_lock_bh(&priv->beacon_lock);
349 priv->beacon.bslot[avp->bslot] = NULL;
350 spin_unlock_bh(&priv->beacon_lock);
351
352 ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n",
353 avp->bslot);
354}
355
356
357
358
359
360void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
361 struct ieee80211_vif *vif)
362{
363 struct ath_common *common = ath9k_hw_common(priv->ah);
364 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
365 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
366 u64 tsfadjust;
367
368 if (avp->bslot == 0)
369 return;
370
371
372
373
374
375
376 tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF;
377 avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust));
378
379 ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
380 (unsigned long long)tsfadjust, avp->bslot);
381}
382
383static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
384{
385 bool *beacon_configured = (bool *)data;
386 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
387
388 if (vif->type == NL80211_IFTYPE_STATION &&
389 avp->beacon_configured)
390 *beacon_configured = true;
391}
392
393static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv,
394 struct ieee80211_vif *vif)
395{
396 struct ath_common *common = ath9k_hw_common(priv->ah);
397 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
398 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
399 bool beacon_configured;
400
401
402
403
404
405
406 if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
407 (priv->num_ap_vif > 1) &&
408 (vif->type == NL80211_IFTYPE_AP) &&
409 (cur_conf->beacon_interval != bss_conf->beacon_int)) {
410 ath_dbg(common, CONFIG,
411 "Changing beacon interval of multiple AP interfaces !\n");
412 return false;
413 }
414
415
416
417
418
419 if (priv->num_ap_vif &&
420 (vif->type != NL80211_IFTYPE_AP)) {
421 ath_dbg(common, CONFIG,
422 "HW in AP mode, cannot set STA beacon parameters\n");
423 return false;
424 }
425
426
427
428
429
430 if ((priv->ah->opmode == NL80211_IFTYPE_STATION) &&
431 (priv->num_sta_vif > 1) &&
432 (vif->type == NL80211_IFTYPE_STATION)) {
433 beacon_configured = false;
434 ieee80211_iterate_active_interfaces_atomic(
435 priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
436 ath9k_htc_beacon_iter, &beacon_configured);
437
438 if (beacon_configured) {
439 ath_dbg(common, CONFIG,
440 "Beacon already configured for a station interface\n");
441 return false;
442 }
443 }
444
445 return true;
446}
447
448void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
449 struct ieee80211_vif *vif)
450{
451 struct ath_common *common = ath9k_hw_common(priv->ah);
452 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
453 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
454 struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
455
456 if (!ath9k_htc_check_beacon_config(priv, vif))
457 return;
458
459 cur_conf->beacon_interval = bss_conf->beacon_int;
460 if (cur_conf->beacon_interval == 0)
461 cur_conf->beacon_interval = 100;
462
463 cur_conf->dtim_period = bss_conf->dtim_period;
464 cur_conf->bmiss_timeout =
465 ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
466
467 switch (vif->type) {
468 case NL80211_IFTYPE_STATION:
469 ath9k_htc_beacon_config_sta(priv, cur_conf);
470 avp->beacon_configured = true;
471 break;
472 case NL80211_IFTYPE_ADHOC:
473 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
474 break;
475 case NL80211_IFTYPE_MESH_POINT:
476 case NL80211_IFTYPE_AP:
477 ath9k_htc_beacon_config_ap(priv, cur_conf);
478 break;
479 default:
480 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
481 return;
482 }
483}
484
485void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv)
486{
487 struct ath_common *common = ath9k_hw_common(priv->ah);
488 struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf;
489
490 switch (priv->ah->opmode) {
491 case NL80211_IFTYPE_STATION:
492 ath9k_htc_beacon_config_sta(priv, cur_conf);
493 break;
494 case NL80211_IFTYPE_ADHOC:
495 ath9k_htc_beacon_config_adhoc(priv, cur_conf);
496 break;
497 case NL80211_IFTYPE_MESH_POINT:
498 case NL80211_IFTYPE_AP:
499 ath9k_htc_beacon_config_ap(priv, cur_conf);
500 break;
501 default:
502 ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
503 return;
504 }
505}
506
