Commit | Line | Data |
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fbbcd146 FF |
1 | /* |
2 | * Copyright (c) 2014 Qualcomm Atheros, 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 "ath9k.h" | |
18 | ||
19 | /* Set/change channels. If the channel is really being changed, it's done | |
20 | * by reseting the chip. To accomplish this we must first cleanup any pending | |
21 | * DMA, then restart stuff. | |
22 | */ | |
23 | static int ath_set_channel(struct ath_softc *sc) | |
24 | { | |
25 | struct ath_hw *ah = sc->sc_ah; | |
26 | struct ath_common *common = ath9k_hw_common(ah); | |
27 | struct ieee80211_hw *hw = sc->hw; | |
28 | struct ath9k_channel *hchan; | |
29 | struct cfg80211_chan_def *chandef = &sc->cur_chan->chandef; | |
30 | struct ieee80211_channel *chan = chandef->chan; | |
31 | int pos = chan->hw_value; | |
32 | int old_pos = -1; | |
33 | int r; | |
34 | ||
35 | if (test_bit(ATH_OP_INVALID, &common->op_flags)) | |
36 | return -EIO; | |
37 | ||
38 | if (ah->curchan) | |
39 | old_pos = ah->curchan - &ah->channels[0]; | |
40 | ||
41 | ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n", | |
42 | chan->center_freq, chandef->width); | |
43 | ||
44 | /* update survey stats for the old channel before switching */ | |
45 | spin_lock_bh(&common->cc_lock); | |
46 | ath_update_survey_stats(sc); | |
47 | spin_unlock_bh(&common->cc_lock); | |
48 | ||
49 | ath9k_cmn_get_channel(hw, ah, chandef); | |
50 | ||
51 | /* If the operating channel changes, change the survey in-use flags | |
52 | * along with it. | |
53 | * Reset the survey data for the new channel, unless we're switching | |
54 | * back to the operating channel from an off-channel operation. | |
55 | */ | |
56 | if (!sc->cur_chan->offchannel && sc->cur_survey != &sc->survey[pos]) { | |
57 | if (sc->cur_survey) | |
58 | sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE; | |
59 | ||
60 | sc->cur_survey = &sc->survey[pos]; | |
61 | ||
62 | memset(sc->cur_survey, 0, sizeof(struct survey_info)); | |
63 | sc->cur_survey->filled |= SURVEY_INFO_IN_USE; | |
64 | } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) { | |
65 | memset(&sc->survey[pos], 0, sizeof(struct survey_info)); | |
66 | } | |
67 | ||
68 | hchan = &sc->sc_ah->channels[pos]; | |
69 | r = ath_reset_internal(sc, hchan); | |
70 | if (r) | |
71 | return r; | |
72 | ||
73 | /* The most recent snapshot of channel->noisefloor for the old | |
74 | * channel is only available after the hardware reset. Copy it to | |
75 | * the survey stats now. | |
76 | */ | |
77 | if (old_pos >= 0) | |
78 | ath_update_survey_nf(sc, old_pos); | |
79 | ||
80 | /* Enable radar pulse detection if on a DFS channel. Spectral | |
81 | * scanning and radar detection can not be used concurrently. | |
82 | */ | |
83 | if (hw->conf.radar_enabled) { | |
84 | u32 rxfilter; | |
85 | ||
86 | /* set HW specific DFS configuration */ | |
87 | ath9k_hw_set_radar_params(ah); | |
88 | rxfilter = ath9k_hw_getrxfilter(ah); | |
89 | rxfilter |= ATH9K_RX_FILTER_PHYRADAR | | |
90 | ATH9K_RX_FILTER_PHYERR; | |
91 | ath9k_hw_setrxfilter(ah, rxfilter); | |
92 | ath_dbg(common, DFS, "DFS enabled at freq %d\n", | |
93 | chan->center_freq); | |
94 | } else { | |
95 | /* perform spectral scan if requested. */ | |
96 | if (test_bit(ATH_OP_SCANNING, &common->op_flags) && | |
97 | sc->spectral_mode == SPECTRAL_CHANSCAN) | |
98 | ath9k_spectral_scan_trigger(hw); | |
99 | } | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
c083ce99 FF |
104 | static bool |
105 | ath_chanctx_send_vif_ps_frame(struct ath_softc *sc, struct ath_vif *avp, | |
106 | bool powersave) | |
107 | { | |
108 | struct ieee80211_vif *vif = avp->vif; | |
109 | struct ieee80211_sta *sta = NULL; | |
110 | struct ieee80211_hdr_3addr *nullfunc; | |
111 | struct ath_tx_control txctl; | |
112 | struct sk_buff *skb; | |
113 | int band = sc->cur_chan->chandef.chan->band; | |
114 | ||
115 | switch (vif->type) { | |
116 | case NL80211_IFTYPE_STATION: | |
117 | if (!vif->bss_conf.assoc) | |
118 | return false; | |
119 | ||
120 | skb = ieee80211_nullfunc_get(sc->hw, vif); | |
121 | if (!skb) | |
122 | return false; | |
123 | ||
124 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; | |
125 | if (powersave) | |
126 | nullfunc->frame_control |= | |
127 | cpu_to_le16(IEEE80211_FCTL_PM); | |
128 | ||
129 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
130 | if (!ieee80211_tx_prepare_skb(sc->hw, vif, skb, band, &sta)) { | |
131 | dev_kfree_skb_any(skb); | |
132 | return false; | |
133 | } | |
134 | break; | |
135 | default: | |
136 | return false; | |
137 | } | |
138 | ||
139 | memset(&txctl, 0, sizeof(txctl)); | |
140 | txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO]; | |
141 | txctl.sta = sta; | |
142 | txctl.force_channel = true; | |
143 | if (ath_tx_start(sc->hw, skb, &txctl)) { | |
144 | ieee80211_free_txskb(sc->hw, skb); | |
145 | return false; | |
146 | } | |
147 | ||
148 | return true; | |
149 | } | |
150 | ||
151 | void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx) | |
152 | { | |
26f16c24 | 153 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
c083ce99 FF |
154 | struct ath_vif *avp; |
155 | bool active = false; | |
26f16c24 | 156 | u8 n_active = 0; |
c083ce99 FF |
157 | |
158 | if (!ctx) | |
159 | return; | |
160 | ||
161 | list_for_each_entry(avp, &ctx->vifs, list) { | |
162 | struct ieee80211_vif *vif = avp->vif; | |
163 | ||
164 | switch (vif->type) { | |
165 | case NL80211_IFTYPE_P2P_CLIENT: | |
166 | case NL80211_IFTYPE_STATION: | |
167 | if (vif->bss_conf.assoc) | |
168 | active = true; | |
169 | break; | |
170 | default: | |
171 | active = true; | |
172 | break; | |
173 | } | |
174 | } | |
175 | ctx->active = active; | |
26f16c24 FF |
176 | |
177 | ath_for_each_chanctx(sc, ctx) { | |
178 | if (!ctx->assigned || list_empty(&ctx->vifs)) | |
179 | continue; | |
180 | n_active++; | |
181 | } | |
182 | ||
73fa2f26 | 183 | if (n_active <= 1) { |
26f16c24 | 184 | clear_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags); |
73fa2f26 FF |
185 | return; |
186 | } | |
187 | if (test_and_set_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) | |
188 | return; | |
189 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL); | |
c083ce99 FF |
190 | } |
191 | ||
192 | static bool | |
193 | ath_chanctx_send_ps_frame(struct ath_softc *sc, bool powersave) | |
194 | { | |
195 | struct ath_vif *avp; | |
196 | bool sent = false; | |
197 | ||
198 | rcu_read_lock(); | |
199 | list_for_each_entry(avp, &sc->cur_chan->vifs, list) { | |
200 | if (ath_chanctx_send_vif_ps_frame(sc, avp, powersave)) | |
201 | sent = true; | |
202 | } | |
203 | rcu_read_unlock(); | |
204 | ||
205 | return sent; | |
206 | } | |
207 | ||
748299f2 FF |
208 | static bool ath_chanctx_defer_switch(struct ath_softc *sc) |
209 | { | |
210 | if (sc->cur_chan == &sc->offchannel.chan) | |
211 | return false; | |
212 | ||
213 | switch (sc->sched.state) { | |
214 | case ATH_CHANCTX_STATE_SWITCH: | |
215 | return false; | |
216 | case ATH_CHANCTX_STATE_IDLE: | |
217 | if (!sc->cur_chan->switch_after_beacon) | |
218 | return false; | |
219 | ||
220 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
221 | break; | |
222 | default: | |
223 | break; | |
224 | } | |
225 | ||
226 | return true; | |
227 | } | |
228 | ||
6036c284 | 229 | static void ath_chanctx_set_next(struct ath_softc *sc, bool force) |
bff11766 | 230 | { |
748299f2 FF |
231 | struct timespec ts; |
232 | bool measure_time = false; | |
c083ce99 | 233 | bool send_ps = false; |
bff11766 | 234 | |
bff11766 FF |
235 | spin_lock_bh(&sc->chan_lock); |
236 | if (!sc->next_chan) { | |
237 | spin_unlock_bh(&sc->chan_lock); | |
bff11766 FF |
238 | return; |
239 | } | |
240 | ||
6036c284 | 241 | if (!force && ath_chanctx_defer_switch(sc)) { |
748299f2 | 242 | spin_unlock_bh(&sc->chan_lock); |
748299f2 FF |
243 | return; |
244 | } | |
245 | ||
bff11766 FF |
246 | if (sc->cur_chan != sc->next_chan) { |
247 | sc->cur_chan->stopped = true; | |
248 | spin_unlock_bh(&sc->chan_lock); | |
249 | ||
748299f2 FF |
250 | if (sc->next_chan == &sc->offchannel.chan) { |
251 | getrawmonotonic(&ts); | |
252 | measure_time = true; | |
253 | } | |
bff11766 FF |
254 | __ath9k_flush(sc->hw, ~0, true); |
255 | ||
c083ce99 FF |
256 | if (ath_chanctx_send_ps_frame(sc, true)) |
257 | __ath9k_flush(sc->hw, BIT(IEEE80211_AC_VO), false); | |
258 | ||
259 | send_ps = true; | |
bff11766 | 260 | spin_lock_bh(&sc->chan_lock); |
8d7e09dd FF |
261 | |
262 | if (sc->cur_chan != &sc->offchannel.chan) { | |
263 | getrawmonotonic(&sc->cur_chan->tsf_ts); | |
264 | sc->cur_chan->tsf_val = ath9k_hw_gettsf64(sc->sc_ah); | |
265 | } | |
bff11766 FF |
266 | } |
267 | sc->cur_chan = sc->next_chan; | |
268 | sc->cur_chan->stopped = false; | |
269 | sc->next_chan = NULL; | |
3ae07d39 | 270 | sc->sched.offchannel_duration = 0; |
6036c284 FF |
271 | if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE) |
272 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
3ae07d39 | 273 | |
bff11766 FF |
274 | spin_unlock_bh(&sc->chan_lock); |
275 | ||
276 | if (sc->sc_ah->chip_fullsleep || | |
277 | memcmp(&sc->cur_chandef, &sc->cur_chan->chandef, | |
748299f2 | 278 | sizeof(sc->cur_chandef))) { |
bff11766 | 279 | ath_set_channel(sc); |
748299f2 FF |
280 | if (measure_time) |
281 | sc->sched.channel_switch_time = | |
282 | ath9k_hw_get_tsf_offset(&ts, NULL); | |
283 | } | |
c083ce99 FF |
284 | if (send_ps) |
285 | ath_chanctx_send_ps_frame(sc, false); | |
286 | ||
78b21949 | 287 | ath_offchannel_channel_change(sc); |
73fa2f26 | 288 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_SWITCH); |
6036c284 FF |
289 | } |
290 | ||
291 | void ath_chanctx_work(struct work_struct *work) | |
292 | { | |
293 | struct ath_softc *sc = container_of(work, struct ath_softc, | |
294 | chanctx_work); | |
295 | mutex_lock(&sc->mutex); | |
296 | ath_chanctx_set_next(sc, false); | |
bff11766 FF |
297 | mutex_unlock(&sc->mutex); |
298 | } | |
299 | ||
fbbcd146 FF |
300 | void ath_chanctx_init(struct ath_softc *sc) |
301 | { | |
302 | struct ath_chanctx *ctx; | |
303 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
304 | struct ieee80211_supported_band *sband; | |
305 | struct ieee80211_channel *chan; | |
0453531e | 306 | int i, j; |
fbbcd146 FF |
307 | |
308 | sband = &common->sbands[IEEE80211_BAND_2GHZ]; | |
309 | if (!sband->n_channels) | |
310 | sband = &common->sbands[IEEE80211_BAND_5GHZ]; | |
311 | ||
312 | chan = &sband->channels[0]; | |
313 | for (i = 0; i < ATH9K_NUM_CHANCTX; i++) { | |
314 | ctx = &sc->chanctx[i]; | |
315 | cfg80211_chandef_create(&ctx->chandef, chan, NL80211_CHAN_HT20); | |
316 | INIT_LIST_HEAD(&ctx->vifs); | |
bc7e1be7 | 317 | ctx->txpower = ATH_TXPOWER_MAX; |
0453531e FF |
318 | for (j = 0; j < ARRAY_SIZE(ctx->acq); j++) |
319 | INIT_LIST_HEAD(&ctx->acq[j]); | |
fbbcd146 | 320 | } |
78b21949 FF |
321 | ctx = &sc->offchannel.chan; |
322 | cfg80211_chandef_create(&ctx->chandef, chan, NL80211_CHAN_HT20); | |
323 | INIT_LIST_HEAD(&ctx->vifs); | |
324 | ctx->txpower = ATH_TXPOWER_MAX; | |
325 | for (j = 0; j < ARRAY_SIZE(ctx->acq); j++) | |
326 | INIT_LIST_HEAD(&ctx->acq[j]); | |
327 | sc->offchannel.chan.offchannel = true; | |
328 | ||
fbbcd146 FF |
329 | } |
330 | ||
6036c284 FF |
331 | void ath9k_chanctx_force_active(struct ieee80211_hw *hw, |
332 | struct ieee80211_vif *vif) | |
333 | { | |
334 | struct ath_softc *sc = hw->priv; | |
335 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
336 | struct ath_vif *avp = (struct ath_vif *) vif->drv_priv; | |
337 | bool changed = false; | |
338 | ||
339 | if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) | |
340 | return; | |
341 | ||
342 | if (!avp->chanctx) | |
343 | return; | |
344 | ||
345 | mutex_lock(&sc->mutex); | |
346 | ||
347 | spin_lock_bh(&sc->chan_lock); | |
348 | if (sc->next_chan || (sc->cur_chan != avp->chanctx)) { | |
349 | sc->next_chan = avp->chanctx; | |
350 | changed = true; | |
351 | } | |
352 | sc->sched.state = ATH_CHANCTX_STATE_FORCE_ACTIVE; | |
353 | spin_unlock_bh(&sc->chan_lock); | |
354 | ||
355 | if (changed) | |
356 | ath_chanctx_set_next(sc, true); | |
357 | ||
358 | mutex_unlock(&sc->mutex); | |
359 | } | |
360 | ||
bff11766 FF |
361 | void ath_chanctx_switch(struct ath_softc *sc, struct ath_chanctx *ctx, |
362 | struct cfg80211_chan_def *chandef) | |
fbbcd146 | 363 | { |
73fa2f26 | 364 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
fbbcd146 | 365 | |
bff11766 | 366 | spin_lock_bh(&sc->chan_lock); |
73fa2f26 FF |
367 | |
368 | if (test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) && | |
369 | (sc->cur_chan != ctx) && (ctx == &sc->offchannel.chan)) { | |
370 | sc->sched.offchannel_pending = true; | |
371 | spin_unlock_bh(&sc->chan_lock); | |
372 | return; | |
373 | } | |
374 | ||
bff11766 FF |
375 | sc->next_chan = ctx; |
376 | if (chandef) | |
377 | ctx->chandef = *chandef; | |
3ae07d39 FF |
378 | |
379 | if (sc->next_chan == &sc->offchannel.chan) { | |
380 | sc->sched.offchannel_duration = | |
381 | TU_TO_USEC(sc->offchannel.duration) + | |
382 | sc->sched.channel_switch_time; | |
383 | } | |
bff11766 FF |
384 | spin_unlock_bh(&sc->chan_lock); |
385 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
386 | } | |
387 | ||
388 | void ath_chanctx_set_channel(struct ath_softc *sc, struct ath_chanctx *ctx, | |
389 | struct cfg80211_chan_def *chandef) | |
390 | { | |
391 | bool cur_chan; | |
392 | ||
393 | spin_lock_bh(&sc->chan_lock); | |
394 | if (chandef) | |
395 | memcpy(&ctx->chandef, chandef, sizeof(*chandef)); | |
396 | cur_chan = sc->cur_chan == ctx; | |
397 | spin_unlock_bh(&sc->chan_lock); | |
398 | ||
399 | if (!cur_chan) | |
400 | return; | |
401 | ||
402 | ath_set_channel(sc); | |
fbbcd146 | 403 | } |
78b21949 | 404 | |
c4dc0d04 | 405 | struct ath_chanctx *ath_chanctx_get_oper_chan(struct ath_softc *sc, bool active) |
78b21949 | 406 | { |
c4dc0d04 RM |
407 | struct ath_chanctx *ctx; |
408 | ||
409 | ath_for_each_chanctx(sc, ctx) { | |
410 | if (!ctx->assigned || list_empty(&ctx->vifs)) | |
411 | continue; | |
412 | if (active && !ctx->active) | |
413 | continue; | |
78b21949 | 414 | |
8eab2510 FF |
415 | if (ctx->switch_after_beacon) |
416 | return ctx; | |
78b21949 FF |
417 | } |
418 | ||
419 | return &sc->chanctx[0]; | |
420 | } | |
421 | ||
422 | void ath_chanctx_offchan_switch(struct ath_softc *sc, | |
423 | struct ieee80211_channel *chan) | |
424 | { | |
425 | struct cfg80211_chan_def chandef; | |
426 | ||
427 | cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); | |
428 | ||
429 | ath_chanctx_switch(sc, &sc->offchannel.chan, &chandef); | |
430 | } | |
748299f2 | 431 | |
58b57375 FF |
432 | static struct ath_chanctx * |
433 | ath_chanctx_get_next(struct ath_softc *sc, struct ath_chanctx *ctx) | |
434 | { | |
435 | int idx = ctx - &sc->chanctx[0]; | |
436 | ||
437 | return &sc->chanctx[!idx]; | |
438 | } | |
439 | ||
440 | static void ath_chanctx_adjust_tbtt_delta(struct ath_softc *sc) | |
441 | { | |
442 | struct ath_chanctx *prev, *cur; | |
443 | struct timespec ts; | |
444 | u32 cur_tsf, prev_tsf, beacon_int; | |
445 | s32 offset; | |
446 | ||
447 | beacon_int = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); | |
448 | ||
449 | cur = sc->cur_chan; | |
450 | prev = ath_chanctx_get_next(sc, cur); | |
451 | ||
452 | getrawmonotonic(&ts); | |
453 | cur_tsf = (u32) cur->tsf_val + | |
454 | ath9k_hw_get_tsf_offset(&cur->tsf_ts, &ts); | |
455 | ||
456 | prev_tsf = prev->last_beacon - (u32) prev->tsf_val + cur_tsf; | |
457 | prev_tsf -= ath9k_hw_get_tsf_offset(&prev->tsf_ts, &ts); | |
458 | ||
459 | /* Adjust the TSF time of the AP chanctx to keep its beacons | |
460 | * at half beacon interval offset relative to the STA chanctx. | |
461 | */ | |
462 | offset = cur_tsf - prev_tsf; | |
463 | ||
464 | /* Ignore stale data or spurious timestamps */ | |
465 | if (offset < 0 || offset > 3 * beacon_int) | |
466 | return; | |
467 | ||
468 | offset = beacon_int / 2 - (offset % beacon_int); | |
469 | prev->tsf_val += offset; | |
470 | } | |
471 | ||
748299f2 FF |
472 | void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, |
473 | enum ath_chanctx_event ev) | |
474 | { | |
475 | struct ath_hw *ah = sc->sc_ah; | |
58b57375 | 476 | struct ath_common *common = ath9k_hw_common(ah); |
3ae07d39 | 477 | struct ath_vif *avp = NULL; |
73fa2f26 | 478 | struct ath_chanctx *ctx; |
748299f2 | 479 | u32 tsf_time; |
3ae07d39 FF |
480 | bool noa_changed = false; |
481 | ||
482 | if (vif) | |
483 | avp = (struct ath_vif *) vif->drv_priv; | |
748299f2 FF |
484 | |
485 | spin_lock_bh(&sc->chan_lock); | |
486 | ||
487 | switch (ev) { | |
488 | case ATH_CHANCTX_EVENT_BEACON_PREPARE: | |
3ae07d39 FF |
489 | if (avp->offchannel_duration) |
490 | avp->offchannel_duration = 0; | |
491 | ||
73fa2f26 FF |
492 | if (avp->chanctx != sc->cur_chan) |
493 | break; | |
494 | ||
495 | if (sc->sched.offchannel_pending) { | |
496 | sc->sched.offchannel_pending = false; | |
497 | sc->next_chan = &sc->offchannel.chan; | |
498 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
499 | } | |
500 | ||
501 | ctx = ath_chanctx_get_next(sc, sc->cur_chan); | |
502 | if (ctx->active && sc->sched.state == ATH_CHANCTX_STATE_IDLE) { | |
503 | sc->next_chan = ctx; | |
504 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
505 | } | |
506 | ||
507 | /* if the timer missed its window, use the next interval */ | |
508 | if (sc->sched.state == ATH_CHANCTX_STATE_WAIT_FOR_TIMER) | |
509 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
510 | ||
748299f2 FF |
511 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) |
512 | break; | |
513 | ||
514 | sc->sched.beacon_pending = true; | |
515 | sc->sched.next_tbtt = REG_READ(ah, AR_NEXT_TBTT_TIMER); | |
3ae07d39 FF |
516 | |
517 | /* defer channel switch by a quarter beacon interval */ | |
518 | tsf_time = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); | |
519 | tsf_time = sc->sched.next_tbtt + tsf_time / 4; | |
520 | sc->sched.switch_start_time = tsf_time; | |
58b57375 | 521 | sc->cur_chan->last_beacon = sc->sched.next_tbtt; |
3ae07d39 FF |
522 | |
523 | if (sc->sched.offchannel_duration) { | |
524 | noa_changed = true; | |
525 | avp->offchannel_start = tsf_time; | |
526 | avp->offchannel_duration = | |
527 | sc->sched.offchannel_duration; | |
528 | } | |
529 | ||
530 | if (noa_changed) | |
531 | avp->noa_index++; | |
748299f2 FF |
532 | break; |
533 | case ATH_CHANCTX_EVENT_BEACON_SENT: | |
534 | if (!sc->sched.beacon_pending) | |
535 | break; | |
536 | ||
537 | sc->sched.beacon_pending = false; | |
538 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) | |
539 | break; | |
540 | ||
748299f2 | 541 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; |
3ae07d39 FF |
542 | ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, |
543 | sc->sched.switch_start_time, | |
544 | 1000000); | |
748299f2 FF |
545 | break; |
546 | case ATH_CHANCTX_EVENT_TSF_TIMER: | |
547 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_TIMER) | |
548 | break; | |
549 | ||
550 | sc->sched.state = ATH_CHANCTX_STATE_SWITCH; | |
551 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
552 | break; | |
58b57375 | 553 | case ATH_CHANCTX_EVENT_BEACON_RECEIVED: |
73fa2f26 FF |
554 | if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) || |
555 | sc->cur_chan == &sc->offchannel.chan) | |
58b57375 FF |
556 | break; |
557 | ||
558 | ath_chanctx_adjust_tbtt_delta(sc); | |
559 | break; | |
73fa2f26 FF |
560 | case ATH_CHANCTX_EVENT_ASSOC: |
561 | if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE || | |
562 | avp->chanctx != sc->cur_chan) | |
563 | break; | |
564 | ||
565 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
566 | /* fall through */ | |
567 | case ATH_CHANCTX_EVENT_SWITCH: | |
568 | if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) || | |
569 | sc->sched.state == ATH_CHANCTX_STATE_FORCE_ACTIVE || | |
570 | sc->cur_chan->switch_after_beacon || | |
571 | sc->cur_chan == &sc->offchannel.chan) | |
572 | break; | |
573 | ||
574 | /* If this is a station chanctx, stay active for a half | |
575 | * beacon period (minus channel switch time) | |
576 | */ | |
577 | sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan); | |
578 | ||
579 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; | |
580 | tsf_time = ath9k_hw_gettsf32(sc->sc_ah); | |
581 | tsf_time += | |
582 | TU_TO_USEC(sc->cur_chan->beacon.beacon_interval) / 2; | |
583 | tsf_time -= sc->sched.channel_switch_time; | |
584 | sc->sched.switch_start_time = tsf_time; | |
585 | ||
586 | ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, | |
587 | tsf_time, 1000000); | |
588 | break; | |
589 | case ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL: | |
590 | if (sc->cur_chan == &sc->offchannel.chan || | |
591 | sc->cur_chan->switch_after_beacon) | |
592 | break; | |
593 | ||
594 | sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan); | |
595 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
596 | break; | |
597 | case ATH_CHANCTX_EVENT_UNASSIGN: | |
598 | if (sc->cur_chan->assigned) { | |
599 | if (sc->next_chan && !sc->next_chan->assigned && | |
600 | sc->next_chan != &sc->offchannel.chan) | |
601 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
602 | break; | |
603 | } | |
604 | ||
605 | ctx = ath_chanctx_get_next(sc, sc->cur_chan); | |
606 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
607 | if (!ctx->assigned) | |
608 | break; | |
609 | ||
610 | sc->next_chan = ctx; | |
611 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
612 | break; | |
748299f2 FF |
613 | } |
614 | ||
615 | spin_unlock_bh(&sc->chan_lock); | |
616 | } |