Commit | Line | Data |
---|---|---|
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; | |
ba24d63d | 32 | unsigned long flags; |
fbbcd146 FF |
33 | int old_pos = -1; |
34 | int r; | |
35 | ||
36 | if (test_bit(ATH_OP_INVALID, &common->op_flags)) | |
37 | return -EIO; | |
38 | ||
39 | if (ah->curchan) | |
40 | old_pos = ah->curchan - &ah->channels[0]; | |
41 | ||
42 | ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n", | |
43 | chan->center_freq, chandef->width); | |
44 | ||
45 | /* update survey stats for the old channel before switching */ | |
ba24d63d | 46 | spin_lock_irqsave(&common->cc_lock, flags); |
fbbcd146 | 47 | ath_update_survey_stats(sc); |
ba24d63d | 48 | spin_unlock_irqrestore(&common->cc_lock, flags); |
fbbcd146 FF |
49 | |
50 | ath9k_cmn_get_channel(hw, ah, chandef); | |
51 | ||
52 | /* If the operating channel changes, change the survey in-use flags | |
53 | * along with it. | |
54 | * Reset the survey data for the new channel, unless we're switching | |
55 | * back to the operating channel from an off-channel operation. | |
56 | */ | |
57 | if (!sc->cur_chan->offchannel && sc->cur_survey != &sc->survey[pos]) { | |
58 | if (sc->cur_survey) | |
59 | sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE; | |
60 | ||
61 | sc->cur_survey = &sc->survey[pos]; | |
62 | ||
63 | memset(sc->cur_survey, 0, sizeof(struct survey_info)); | |
64 | sc->cur_survey->filled |= SURVEY_INFO_IN_USE; | |
65 | } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) { | |
66 | memset(&sc->survey[pos], 0, sizeof(struct survey_info)); | |
67 | } | |
68 | ||
69 | hchan = &sc->sc_ah->channels[pos]; | |
5555c955 | 70 | r = ath_reset(sc, hchan); |
fbbcd146 FF |
71 | if (r) |
72 | return r; | |
73 | ||
74 | /* The most recent snapshot of channel->noisefloor for the old | |
75 | * channel is only available after the hardware reset. Copy it to | |
76 | * the survey stats now. | |
77 | */ | |
78 | if (old_pos >= 0) | |
79 | ath_update_survey_nf(sc, old_pos); | |
80 | ||
81 | /* Enable radar pulse detection if on a DFS channel. Spectral | |
82 | * scanning and radar detection can not be used concurrently. | |
83 | */ | |
84 | if (hw->conf.radar_enabled) { | |
85 | u32 rxfilter; | |
86 | ||
fbbcd146 FF |
87 | rxfilter = ath9k_hw_getrxfilter(ah); |
88 | rxfilter |= ATH9K_RX_FILTER_PHYRADAR | | |
89 | ATH9K_RX_FILTER_PHYERR; | |
90 | ath9k_hw_setrxfilter(ah, rxfilter); | |
91 | ath_dbg(common, DFS, "DFS enabled at freq %d\n", | |
92 | chan->center_freq); | |
93 | } else { | |
94 | /* perform spectral scan if requested. */ | |
95 | if (test_bit(ATH_OP_SCANNING, &common->op_flags) && | |
8391f601 | 96 | sc->spec_priv.spectral_mode == SPECTRAL_CHANSCAN) |
67dc74f1 | 97 | ath9k_cmn_spectral_scan_trigger(common, &sc->spec_priv); |
fbbcd146 FF |
98 | } |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | void ath_chanctx_init(struct ath_softc *sc) | |
104 | { | |
105 | struct ath_chanctx *ctx; | |
106 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
107 | struct ieee80211_supported_band *sband; | |
108 | struct ieee80211_channel *chan; | |
0453531e | 109 | int i, j; |
fbbcd146 | 110 | |
57fbcce3 | 111 | sband = &common->sbands[NL80211_BAND_2GHZ]; |
fbbcd146 | 112 | if (!sband->n_channels) |
57fbcce3 | 113 | sband = &common->sbands[NL80211_BAND_5GHZ]; |
fbbcd146 FF |
114 | |
115 | chan = &sband->channels[0]; | |
116 | for (i = 0; i < ATH9K_NUM_CHANCTX; i++) { | |
117 | ctx = &sc->chanctx[i]; | |
118 | cfg80211_chandef_create(&ctx->chandef, chan, NL80211_CHAN_HT20); | |
119 | INIT_LIST_HEAD(&ctx->vifs); | |
bc7e1be7 | 120 | ctx->txpower = ATH_TXPOWER_MAX; |
2fae0d9f | 121 | ctx->flush_timeout = HZ / 5; /* 200ms */ |
63fefa05 THJ |
122 | for (j = 0; j < ARRAY_SIZE(ctx->acq); j++) { |
123 | INIT_LIST_HEAD(&ctx->acq[j].acq_new); | |
124 | INIT_LIST_HEAD(&ctx->acq[j].acq_old); | |
125 | spin_lock_init(&ctx->acq[j].lock); | |
126 | } | |
fbbcd146 | 127 | } |
fbbcd146 FF |
128 | } |
129 | ||
bff11766 FF |
130 | void ath_chanctx_set_channel(struct ath_softc *sc, struct ath_chanctx *ctx, |
131 | struct cfg80211_chan_def *chandef) | |
132 | { | |
4c7e9aee | 133 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
bff11766 FF |
134 | bool cur_chan; |
135 | ||
136 | spin_lock_bh(&sc->chan_lock); | |
137 | if (chandef) | |
138 | memcpy(&ctx->chandef, chandef, sizeof(*chandef)); | |
139 | cur_chan = sc->cur_chan == ctx; | |
140 | spin_unlock_bh(&sc->chan_lock); | |
141 | ||
4c7e9aee SM |
142 | if (!cur_chan) { |
143 | ath_dbg(common, CHAN_CTX, | |
144 | "Current context differs from the new context\n"); | |
bff11766 | 145 | return; |
4c7e9aee | 146 | } |
bff11766 FF |
147 | |
148 | ath_set_channel(sc); | |
fbbcd146 | 149 | } |
78b21949 | 150 | |
27babf9f SM |
151 | #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT |
152 | ||
26103b8d SM |
153 | /*************/ |
154 | /* Utilities */ | |
155 | /*************/ | |
156 | ||
157 | struct ath_chanctx* ath_is_go_chanctx_present(struct ath_softc *sc) | |
158 | { | |
159 | struct ath_chanctx *ctx; | |
160 | struct ath_vif *avp; | |
161 | struct ieee80211_vif *vif; | |
162 | ||
163 | spin_lock_bh(&sc->chan_lock); | |
164 | ||
165 | ath_for_each_chanctx(sc, ctx) { | |
166 | if (!ctx->active) | |
167 | continue; | |
168 | ||
169 | list_for_each_entry(avp, &ctx->vifs, list) { | |
170 | vif = avp->vif; | |
171 | ||
172 | if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO) { | |
173 | spin_unlock_bh(&sc->chan_lock); | |
174 | return ctx; | |
175 | } | |
176 | } | |
177 | } | |
178 | ||
179 | spin_unlock_bh(&sc->chan_lock); | |
180 | return NULL; | |
181 | } | |
182 | ||
0e08b5fb SM |
183 | /**********************************************************/ |
184 | /* Functions to handle the channel context state machine. */ | |
185 | /**********************************************************/ | |
186 | ||
27babf9f SM |
187 | static const char *offchannel_state_string(enum ath_offchannel_state state) |
188 | { | |
27babf9f SM |
189 | switch (state) { |
190 | case_rtn_string(ATH_OFFCHANNEL_IDLE); | |
191 | case_rtn_string(ATH_OFFCHANNEL_PROBE_SEND); | |
192 | case_rtn_string(ATH_OFFCHANNEL_PROBE_WAIT); | |
193 | case_rtn_string(ATH_OFFCHANNEL_SUSPEND); | |
194 | case_rtn_string(ATH_OFFCHANNEL_ROC_START); | |
195 | case_rtn_string(ATH_OFFCHANNEL_ROC_WAIT); | |
196 | case_rtn_string(ATH_OFFCHANNEL_ROC_DONE); | |
197 | default: | |
198 | return "unknown"; | |
199 | } | |
200 | } | |
201 | ||
5a8cbec7 SM |
202 | static const char *chanctx_event_string(enum ath_chanctx_event ev) |
203 | { | |
204 | switch (ev) { | |
205 | case_rtn_string(ATH_CHANCTX_EVENT_BEACON_PREPARE); | |
206 | case_rtn_string(ATH_CHANCTX_EVENT_BEACON_SENT); | |
207 | case_rtn_string(ATH_CHANCTX_EVENT_TSF_TIMER); | |
208 | case_rtn_string(ATH_CHANCTX_EVENT_BEACON_RECEIVED); | |
b8f9279b | 209 | case_rtn_string(ATH_CHANCTX_EVENT_AUTHORIZED); |
5a8cbec7 SM |
210 | case_rtn_string(ATH_CHANCTX_EVENT_SWITCH); |
211 | case_rtn_string(ATH_CHANCTX_EVENT_ASSIGN); | |
212 | case_rtn_string(ATH_CHANCTX_EVENT_UNASSIGN); | |
213 | case_rtn_string(ATH_CHANCTX_EVENT_CHANGE); | |
214 | case_rtn_string(ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL); | |
215 | default: | |
216 | return "unknown"; | |
217 | } | |
218 | } | |
219 | ||
220 | static const char *chanctx_state_string(enum ath_chanctx_state state) | |
221 | { | |
222 | switch (state) { | |
223 | case_rtn_string(ATH_CHANCTX_STATE_IDLE); | |
224 | case_rtn_string(ATH_CHANCTX_STATE_WAIT_FOR_BEACON); | |
225 | case_rtn_string(ATH_CHANCTX_STATE_WAIT_FOR_TIMER); | |
226 | case_rtn_string(ATH_CHANCTX_STATE_SWITCH); | |
227 | case_rtn_string(ATH_CHANCTX_STATE_FORCE_ACTIVE); | |
228 | default: | |
229 | return "unknown"; | |
230 | } | |
231 | } | |
232 | ||
344cd850 | 233 | static u32 chanctx_event_delta(struct ath_softc *sc) |
02edab5b JD |
234 | { |
235 | u64 ms; | |
236 | struct timespec ts, *old; | |
237 | ||
238 | getrawmonotonic(&ts); | |
239 | old = &sc->last_event_time; | |
240 | ms = ts.tv_sec * 1000 + ts.tv_nsec / 1000000; | |
241 | ms -= old->tv_sec * 1000 + old->tv_nsec / 1000000; | |
242 | sc->last_event_time = ts; | |
243 | ||
244 | return (u32)ms; | |
245 | } | |
246 | ||
a09798f4 SM |
247 | void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx) |
248 | { | |
249 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
67259d51 | 250 | struct ath_chanctx *ictx; |
a09798f4 SM |
251 | struct ath_vif *avp; |
252 | bool active = false; | |
253 | u8 n_active = 0; | |
254 | ||
255 | if (!ctx) | |
256 | return; | |
257 | ||
290c8a77 SM |
258 | if (ctx == &sc->offchannel.chan) { |
259 | spin_lock_bh(&sc->chan_lock); | |
260 | ||
261 | if (likely(sc->sched.channel_switch_time)) | |
262 | ctx->flush_timeout = | |
263 | usecs_to_jiffies(sc->sched.channel_switch_time); | |
264 | else | |
265 | ctx->flush_timeout = | |
266 | msecs_to_jiffies(10); | |
267 | ||
268 | spin_unlock_bh(&sc->chan_lock); | |
269 | ||
270 | /* | |
271 | * There is no need to iterate over the | |
272 | * active/assigned channel contexts if | |
273 | * the current context is offchannel. | |
274 | */ | |
275 | return; | |
276 | } | |
277 | ||
67259d51 SM |
278 | ictx = ctx; |
279 | ||
a09798f4 SM |
280 | list_for_each_entry(avp, &ctx->vifs, list) { |
281 | struct ieee80211_vif *vif = avp->vif; | |
282 | ||
283 | switch (vif->type) { | |
284 | case NL80211_IFTYPE_P2P_CLIENT: | |
285 | case NL80211_IFTYPE_STATION: | |
cb35582a | 286 | if (avp->assoc) |
a09798f4 SM |
287 | active = true; |
288 | break; | |
289 | default: | |
290 | active = true; | |
291 | break; | |
292 | } | |
293 | } | |
294 | ctx->active = active; | |
295 | ||
296 | ath_for_each_chanctx(sc, ctx) { | |
297 | if (!ctx->assigned || list_empty(&ctx->vifs)) | |
298 | continue; | |
299 | n_active++; | |
300 | } | |
301 | ||
67259d51 SM |
302 | spin_lock_bh(&sc->chan_lock); |
303 | ||
a09798f4 | 304 | if (n_active <= 1) { |
67259d51 | 305 | ictx->flush_timeout = HZ / 5; |
a09798f4 | 306 | clear_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags); |
67259d51 | 307 | spin_unlock_bh(&sc->chan_lock); |
a09798f4 SM |
308 | return; |
309 | } | |
67259d51 SM |
310 | |
311 | ictx->flush_timeout = usecs_to_jiffies(sc->sched.channel_switch_time); | |
312 | ||
313 | if (test_and_set_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) { | |
314 | spin_unlock_bh(&sc->chan_lock); | |
a09798f4 | 315 | return; |
67259d51 SM |
316 | } |
317 | ||
318 | spin_unlock_bh(&sc->chan_lock); | |
a09798f4 SM |
319 | |
320 | if (ath9k_is_chanctx_enabled()) { | |
321 | ath_chanctx_event(sc, NULL, | |
322 | ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL); | |
323 | } | |
324 | } | |
325 | ||
58b57375 FF |
326 | static struct ath_chanctx * |
327 | ath_chanctx_get_next(struct ath_softc *sc, struct ath_chanctx *ctx) | |
328 | { | |
329 | int idx = ctx - &sc->chanctx[0]; | |
330 | ||
331 | return &sc->chanctx[!idx]; | |
332 | } | |
333 | ||
334 | static void ath_chanctx_adjust_tbtt_delta(struct ath_softc *sc) | |
335 | { | |
336 | struct ath_chanctx *prev, *cur; | |
337 | struct timespec ts; | |
338 | u32 cur_tsf, prev_tsf, beacon_int; | |
339 | s32 offset; | |
340 | ||
341 | beacon_int = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); | |
342 | ||
343 | cur = sc->cur_chan; | |
344 | prev = ath_chanctx_get_next(sc, cur); | |
345 | ||
7f30eac9 SM |
346 | if (!prev->switch_after_beacon) |
347 | return; | |
348 | ||
58b57375 FF |
349 | getrawmonotonic(&ts); |
350 | cur_tsf = (u32) cur->tsf_val + | |
351 | ath9k_hw_get_tsf_offset(&cur->tsf_ts, &ts); | |
352 | ||
353 | prev_tsf = prev->last_beacon - (u32) prev->tsf_val + cur_tsf; | |
354 | prev_tsf -= ath9k_hw_get_tsf_offset(&prev->tsf_ts, &ts); | |
355 | ||
356 | /* Adjust the TSF time of the AP chanctx to keep its beacons | |
357 | * at half beacon interval offset relative to the STA chanctx. | |
358 | */ | |
359 | offset = cur_tsf - prev_tsf; | |
360 | ||
361 | /* Ignore stale data or spurious timestamps */ | |
362 | if (offset < 0 || offset > 3 * beacon_int) | |
363 | return; | |
364 | ||
365 | offset = beacon_int / 2 - (offset % beacon_int); | |
366 | prev->tsf_val += offset; | |
367 | } | |
368 | ||
42eda115 FF |
369 | /* Configure the TSF based hardware timer for a channel switch. |
370 | * Also set up backup software timer, in case the gen timer fails. | |
371 | * This could be caused by a hardware reset. | |
372 | */ | |
373 | static void ath_chanctx_setup_timer(struct ath_softc *sc, u32 tsf_time) | |
374 | { | |
878066e7 | 375 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
42eda115 | 376 | struct ath_hw *ah = sc->sc_ah; |
2f985539 | 377 | unsigned long timeout; |
42eda115 FF |
378 | |
379 | ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, tsf_time, 1000000); | |
380 | tsf_time -= ath9k_hw_gettsf32(ah); | |
2f985539 JD |
381 | timeout = msecs_to_jiffies(tsf_time / 1000) + 1; |
382 | mod_timer(&sc->sched.timer, jiffies + timeout); | |
878066e7 SM |
383 | |
384 | ath_dbg(common, CHAN_CTX, | |
2f985539 JD |
385 | "Setup chanctx timer with timeout: %d (%d) ms\n", |
386 | tsf_time / 1000, jiffies_to_msecs(timeout)); | |
42eda115 FF |
387 | } |
388 | ||
828fe01a SM |
389 | static void ath_chanctx_handle_bmiss(struct ath_softc *sc, |
390 | struct ath_chanctx *ctx, | |
391 | struct ath_vif *avp) | |
392 | { | |
393 | /* | |
394 | * Clear the extend_absence flag if it had been | |
395 | * set during the previous beacon transmission, | |
396 | * since we need to revert to the normal NoA | |
397 | * schedule. | |
398 | */ | |
399 | if (ctx->active && sc->sched.extend_absence) { | |
400 | avp->noa_duration = 0; | |
401 | sc->sched.extend_absence = false; | |
402 | } | |
403 | ||
404 | /* If at least two consecutive beacons were missed on the STA | |
405 | * chanctx, stay on the STA channel for one extra beacon period, | |
406 | * to resync the timer properly. | |
407 | */ | |
408 | if (ctx->active && sc->sched.beacon_miss >= 2) { | |
409 | avp->noa_duration = 0; | |
410 | sc->sched.extend_absence = true; | |
411 | } | |
412 | } | |
413 | ||
a23152a8 SM |
414 | static void ath_chanctx_offchannel_noa(struct ath_softc *sc, |
415 | struct ath_chanctx *ctx, | |
416 | struct ath_vif *avp, | |
417 | u32 tsf_time) | |
418 | { | |
419 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
420 | ||
421 | avp->noa_index++; | |
422 | avp->offchannel_start = tsf_time; | |
423 | avp->offchannel_duration = sc->sched.offchannel_duration; | |
424 | ||
425 | ath_dbg(common, CHAN_CTX, | |
58bb9ca8 | 426 | "offchannel noa_duration: %d, noa_start: %u, noa_index: %d\n", |
a23152a8 SM |
427 | avp->offchannel_duration, |
428 | avp->offchannel_start, | |
429 | avp->noa_index); | |
430 | ||
431 | /* | |
432 | * When multiple contexts are active, the NoA | |
433 | * has to be recalculated and advertised after | |
434 | * an offchannel operation. | |
435 | */ | |
436 | if (ctx->active && avp->noa_duration) | |
437 | avp->noa_duration = 0; | |
438 | } | |
439 | ||
347a9566 SM |
440 | static void ath_chanctx_set_periodic_noa(struct ath_softc *sc, |
441 | struct ath_vif *avp, | |
442 | struct ath_beacon_config *cur_conf, | |
443 | u32 tsf_time, | |
444 | u32 beacon_int) | |
445 | { | |
446 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
447 | ||
448 | avp->noa_index++; | |
449 | avp->noa_start = tsf_time; | |
450 | ||
451 | if (sc->sched.extend_absence) | |
452 | avp->noa_duration = (3 * beacon_int / 2) + | |
453 | sc->sched.channel_switch_time; | |
454 | else | |
455 | avp->noa_duration = | |
456 | TU_TO_USEC(cur_conf->beacon_interval) / 2 + | |
457 | sc->sched.channel_switch_time; | |
458 | ||
459 | if (test_bit(ATH_OP_SCANNING, &common->op_flags) || | |
460 | sc->sched.extend_absence) | |
461 | avp->periodic_noa = false; | |
462 | else | |
463 | avp->periodic_noa = true; | |
464 | ||
465 | ath_dbg(common, CHAN_CTX, | |
58bb9ca8 | 466 | "noa_duration: %d, noa_start: %u, noa_index: %d, periodic: %d\n", |
347a9566 SM |
467 | avp->noa_duration, |
468 | avp->noa_start, | |
469 | avp->noa_index, | |
470 | avp->periodic_noa); | |
471 | } | |
472 | ||
0a019a58 SM |
473 | static void ath_chanctx_set_oneshot_noa(struct ath_softc *sc, |
474 | struct ath_vif *avp, | |
475 | u32 tsf_time, | |
476 | u32 duration) | |
477 | { | |
478 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
479 | ||
480 | avp->noa_index++; | |
481 | avp->noa_start = tsf_time; | |
482 | avp->periodic_noa = false; | |
483 | avp->oneshot_noa = true; | |
484 | avp->noa_duration = duration + sc->sched.channel_switch_time; | |
485 | ||
486 | ath_dbg(common, CHAN_CTX, | |
58bb9ca8 | 487 | "oneshot noa_duration: %d, noa_start: %u, noa_index: %d, periodic: %d\n", |
0a019a58 SM |
488 | avp->noa_duration, |
489 | avp->noa_start, | |
490 | avp->noa_index, | |
491 | avp->periodic_noa); | |
492 | } | |
493 | ||
748299f2 FF |
494 | void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, |
495 | enum ath_chanctx_event ev) | |
496 | { | |
497 | struct ath_hw *ah = sc->sc_ah; | |
58b57375 | 498 | struct ath_common *common = ath9k_hw_common(ah); |
7414863e | 499 | struct ath_beacon_config *cur_conf; |
3ae07d39 | 500 | struct ath_vif *avp = NULL; |
73fa2f26 | 501 | struct ath_chanctx *ctx; |
748299f2 | 502 | u32 tsf_time; |
ec70abe1 | 503 | u32 beacon_int; |
3ae07d39 FF |
504 | |
505 | if (vif) | |
506 | avp = (struct ath_vif *) vif->drv_priv; | |
748299f2 FF |
507 | |
508 | spin_lock_bh(&sc->chan_lock); | |
509 | ||
02edab5b | 510 | ath_dbg(common, CHAN_CTX, "cur_chan: %d MHz, event: %s, state: %s, delta: %u ms\n", |
878066e7 SM |
511 | sc->cur_chan->chandef.center_freq1, |
512 | chanctx_event_string(ev), | |
02edab5b JD |
513 | chanctx_state_string(sc->sched.state), |
514 | chanctx_event_delta(sc)); | |
878066e7 | 515 | |
748299f2 FF |
516 | switch (ev) { |
517 | case ATH_CHANCTX_EVENT_BEACON_PREPARE: | |
3ae07d39 FF |
518 | if (avp->offchannel_duration) |
519 | avp->offchannel_duration = 0; | |
520 | ||
0a019a58 SM |
521 | if (avp->oneshot_noa) { |
522 | avp->noa_duration = 0; | |
523 | avp->oneshot_noa = false; | |
524 | ||
525 | ath_dbg(common, CHAN_CTX, | |
526 | "Clearing oneshot NoA\n"); | |
527 | } | |
528 | ||
878066e7 SM |
529 | if (avp->chanctx != sc->cur_chan) { |
530 | ath_dbg(common, CHAN_CTX, | |
531 | "Contexts differ, not preparing beacon\n"); | |
73fa2f26 | 532 | break; |
878066e7 | 533 | } |
73fa2f26 | 534 | |
367b341e | 535 | if (sc->sched.offchannel_pending && !sc->sched.wait_switch) { |
73fa2f26 FF |
536 | sc->sched.offchannel_pending = false; |
537 | sc->next_chan = &sc->offchannel.chan; | |
538 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
878066e7 SM |
539 | ath_dbg(common, CHAN_CTX, |
540 | "Setting offchannel_pending to false\n"); | |
73fa2f26 FF |
541 | } |
542 | ||
543 | ctx = ath_chanctx_get_next(sc, sc->cur_chan); | |
544 | if (ctx->active && sc->sched.state == ATH_CHANCTX_STATE_IDLE) { | |
545 | sc->next_chan = ctx; | |
546 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
878066e7 SM |
547 | ath_dbg(common, CHAN_CTX, |
548 | "Set next context, move chanctx state to WAIT_FOR_BEACON\n"); | |
73fa2f26 FF |
549 | } |
550 | ||
551 | /* if the timer missed its window, use the next interval */ | |
878066e7 | 552 | if (sc->sched.state == ATH_CHANCTX_STATE_WAIT_FOR_TIMER) { |
73fa2f26 | 553 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; |
878066e7 SM |
554 | ath_dbg(common, CHAN_CTX, |
555 | "Move chanctx state from WAIT_FOR_TIMER to WAIT_FOR_BEACON\n"); | |
556 | } | |
73fa2f26 | 557 | |
c6500ea2 SM |
558 | if (sc->sched.mgd_prepare_tx) |
559 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
560 | ||
8890d05f SM |
561 | /* |
562 | * When a context becomes inactive, for example, | |
563 | * disassociation of a station context, the NoA | |
564 | * attribute needs to be removed from subsequent | |
565 | * beacons. | |
566 | */ | |
567 | if (!ctx->active && avp->noa_duration && | |
568 | sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) { | |
569 | avp->noa_duration = 0; | |
570 | avp->periodic_noa = false; | |
571 | ||
572 | ath_dbg(common, CHAN_CTX, | |
573 | "Clearing NoA schedule\n"); | |
574 | } | |
575 | ||
748299f2 FF |
576 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) |
577 | break; | |
578 | ||
878066e7 SM |
579 | ath_dbg(common, CHAN_CTX, "Preparing beacon for vif: %pM\n", vif->addr); |
580 | ||
748299f2 FF |
581 | sc->sched.beacon_pending = true; |
582 | sc->sched.next_tbtt = REG_READ(ah, AR_NEXT_TBTT_TIMER); | |
3ae07d39 | 583 | |
7414863e | 584 | cur_conf = &sc->cur_chan->beacon; |
ec70abe1 FF |
585 | beacon_int = TU_TO_USEC(cur_conf->beacon_interval); |
586 | ||
3ae07d39 | 587 | /* defer channel switch by a quarter beacon interval */ |
ec70abe1 | 588 | tsf_time = sc->sched.next_tbtt + beacon_int / 4; |
3ae07d39 | 589 | sc->sched.switch_start_time = tsf_time; |
58b57375 | 590 | sc->cur_chan->last_beacon = sc->sched.next_tbtt; |
3ae07d39 | 591 | |
d0975edd SM |
592 | /* |
593 | * If an offchannel switch is scheduled to happen after | |
594 | * a beacon transmission, update the NoA with one-shot | |
595 | * values and increment the index. | |
596 | */ | |
597 | if (sc->next_chan == &sc->offchannel.chan) { | |
a23152a8 | 598 | ath_chanctx_offchannel_noa(sc, ctx, avp, tsf_time); |
d0975edd | 599 | break; |
3ae07d39 FF |
600 | } |
601 | ||
828fe01a | 602 | ath_chanctx_handle_bmiss(sc, ctx, avp); |
a2b28601 | 603 | |
0a019a58 SM |
604 | /* |
605 | * If a mgd_prepare_tx() has been called by mac80211, | |
606 | * a one-shot NoA needs to be sent. This can happen | |
607 | * with one or more active channel contexts - in both | |
608 | * cases, a new NoA schedule has to be advertised. | |
609 | */ | |
610 | if (sc->sched.mgd_prepare_tx) { | |
611 | ath_chanctx_set_oneshot_noa(sc, avp, tsf_time, | |
612 | jiffies_to_usecs(HZ / 5)); | |
613 | break; | |
614 | } | |
615 | ||
d0975edd SM |
616 | /* Prevent wrap-around issues */ |
617 | if (avp->noa_duration && tsf_time - avp->noa_start > BIT(30)) | |
618 | avp->noa_duration = 0; | |
619 | ||
620 | /* | |
621 | * If multiple contexts are active, start periodic | |
622 | * NoA and increment the index for the first | |
623 | * announcement. | |
624 | */ | |
625 | if (ctx->active && | |
347a9566 SM |
626 | (!avp->noa_duration || sc->sched.force_noa_update)) |
627 | ath_chanctx_set_periodic_noa(sc, avp, cur_conf, | |
628 | tsf_time, beacon_int); | |
d0975edd SM |
629 | |
630 | if (ctx->active && sc->sched.force_noa_update) | |
631 | sc->sched.force_noa_update = false; | |
878066e7 | 632 | |
748299f2 FF |
633 | break; |
634 | case ATH_CHANCTX_EVENT_BEACON_SENT: | |
878066e7 SM |
635 | if (!sc->sched.beacon_pending) { |
636 | ath_dbg(common, CHAN_CTX, | |
637 | "No pending beacon\n"); | |
748299f2 | 638 | break; |
878066e7 | 639 | } |
748299f2 FF |
640 | |
641 | sc->sched.beacon_pending = false; | |
c6500ea2 SM |
642 | |
643 | if (sc->sched.mgd_prepare_tx) { | |
644 | sc->sched.mgd_prepare_tx = false; | |
645 | complete(&sc->go_beacon); | |
646 | ath_dbg(common, CHAN_CTX, | |
647 | "Beacon sent, complete go_beacon\n"); | |
648 | break; | |
649 | } | |
650 | ||
748299f2 FF |
651 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) |
652 | break; | |
653 | ||
878066e7 SM |
654 | ath_dbg(common, CHAN_CTX, |
655 | "Move chanctx state to WAIT_FOR_TIMER\n"); | |
656 | ||
748299f2 | 657 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; |
42eda115 | 658 | ath_chanctx_setup_timer(sc, sc->sched.switch_start_time); |
748299f2 FF |
659 | break; |
660 | case ATH_CHANCTX_EVENT_TSF_TIMER: | |
661 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_TIMER) | |
662 | break; | |
663 | ||
ec70abe1 FF |
664 | if (!sc->cur_chan->switch_after_beacon && |
665 | sc->sched.beacon_pending) | |
666 | sc->sched.beacon_miss++; | |
667 | ||
878066e7 SM |
668 | ath_dbg(common, CHAN_CTX, |
669 | "Move chanctx state to SWITCH\n"); | |
670 | ||
748299f2 FF |
671 | sc->sched.state = ATH_CHANCTX_STATE_SWITCH; |
672 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
673 | break; | |
58b57375 | 674 | case ATH_CHANCTX_EVENT_BEACON_RECEIVED: |
73fa2f26 FF |
675 | if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) || |
676 | sc->cur_chan == &sc->offchannel.chan) | |
58b57375 FF |
677 | break; |
678 | ||
ec70abe1 FF |
679 | sc->sched.beacon_pending = false; |
680 | sc->sched.beacon_miss = 0; | |
a899b678 | 681 | |
be247c1f | 682 | if (sc->sched.state == ATH_CHANCTX_STATE_FORCE_ACTIVE || |
d9092c98 | 683 | !sc->sched.beacon_adjust || |
be247c1f SM |
684 | !sc->cur_chan->tsf_val) |
685 | break; | |
686 | ||
687 | ath_chanctx_adjust_tbtt_delta(sc); | |
688 | ||
a899b678 FF |
689 | /* TSF time might have been updated by the incoming beacon, |
690 | * need update the channel switch timer to reflect the change. | |
691 | */ | |
692 | tsf_time = sc->sched.switch_start_time; | |
693 | tsf_time -= (u32) sc->cur_chan->tsf_val + | |
694 | ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, NULL); | |
695 | tsf_time += ath9k_hw_gettsf32(ah); | |
696 | ||
d9092c98 | 697 | sc->sched.beacon_adjust = false; |
42eda115 | 698 | ath_chanctx_setup_timer(sc, tsf_time); |
58b57375 | 699 | break; |
b8f9279b | 700 | case ATH_CHANCTX_EVENT_AUTHORIZED: |
73fa2f26 FF |
701 | if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE || |
702 | avp->chanctx != sc->cur_chan) | |
703 | break; | |
704 | ||
878066e7 SM |
705 | ath_dbg(common, CHAN_CTX, |
706 | "Move chanctx state from FORCE_ACTIVE to IDLE\n"); | |
707 | ||
73fa2f26 FF |
708 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; |
709 | /* fall through */ | |
710 | case ATH_CHANCTX_EVENT_SWITCH: | |
711 | if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) || | |
712 | sc->sched.state == ATH_CHANCTX_STATE_FORCE_ACTIVE || | |
713 | sc->cur_chan->switch_after_beacon || | |
714 | sc->cur_chan == &sc->offchannel.chan) | |
715 | break; | |
716 | ||
717 | /* If this is a station chanctx, stay active for a half | |
718 | * beacon period (minus channel switch time) | |
719 | */ | |
720 | sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan); | |
7414863e | 721 | cur_conf = &sc->cur_chan->beacon; |
73fa2f26 | 722 | |
878066e7 SM |
723 | ath_dbg(common, CHAN_CTX, |
724 | "Move chanctx state to WAIT_FOR_TIMER (event SWITCH)\n"); | |
725 | ||
73fa2f26 | 726 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; |
367b341e | 727 | sc->sched.wait_switch = false; |
ec70abe1 FF |
728 | |
729 | tsf_time = TU_TO_USEC(cur_conf->beacon_interval) / 2; | |
167bf96d SM |
730 | |
731 | if (sc->sched.extend_absence) { | |
ec70abe1 FF |
732 | sc->sched.beacon_miss = 0; |
733 | tsf_time *= 3; | |
734 | } | |
735 | ||
73fa2f26 | 736 | tsf_time -= sc->sched.channel_switch_time; |
ec70abe1 | 737 | tsf_time += ath9k_hw_gettsf32(sc->sc_ah); |
73fa2f26 FF |
738 | sc->sched.switch_start_time = tsf_time; |
739 | ||
42eda115 | 740 | ath_chanctx_setup_timer(sc, tsf_time); |
ec70abe1 | 741 | sc->sched.beacon_pending = true; |
d9092c98 | 742 | sc->sched.beacon_adjust = true; |
73fa2f26 FF |
743 | break; |
744 | case ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL: | |
745 | if (sc->cur_chan == &sc->offchannel.chan || | |
746 | sc->cur_chan->switch_after_beacon) | |
747 | break; | |
748 | ||
749 | sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan); | |
750 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
751 | break; | |
752 | case ATH_CHANCTX_EVENT_UNASSIGN: | |
753 | if (sc->cur_chan->assigned) { | |
754 | if (sc->next_chan && !sc->next_chan->assigned && | |
755 | sc->next_chan != &sc->offchannel.chan) | |
756 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
757 | break; | |
758 | } | |
759 | ||
760 | ctx = ath_chanctx_get_next(sc, sc->cur_chan); | |
761 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
762 | if (!ctx->assigned) | |
763 | break; | |
764 | ||
765 | sc->next_chan = ctx; | |
766 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
767 | break; | |
02da18b7 SM |
768 | case ATH_CHANCTX_EVENT_ASSIGN: |
769 | break; | |
770 | case ATH_CHANCTX_EVENT_CHANGE: | |
771 | break; | |
748299f2 FF |
772 | } |
773 | ||
774 | spin_unlock_bh(&sc->chan_lock); | |
775 | } | |
dfcbb3e8 | 776 | |
70b06dac SM |
777 | void ath_chanctx_beacon_sent_ev(struct ath_softc *sc, |
778 | enum ath_chanctx_event ev) | |
779 | { | |
780 | if (sc->sched.beacon_pending) | |
781 | ath_chanctx_event(sc, NULL, ev); | |
782 | } | |
783 | ||
a2b28601 | 784 | void ath_chanctx_beacon_recv_ev(struct ath_softc *sc, |
70b06dac SM |
785 | enum ath_chanctx_event ev) |
786 | { | |
70b06dac SM |
787 | ath_chanctx_event(sc, NULL, ev); |
788 | } | |
789 | ||
dfcbb3e8 SM |
790 | static int ath_scan_channel_duration(struct ath_softc *sc, |
791 | struct ieee80211_channel *chan) | |
792 | { | |
793 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; | |
794 | ||
795 | if (!req->n_ssids || (chan->flags & IEEE80211_CHAN_NO_IR)) | |
796 | return (HZ / 9); /* ~110 ms */ | |
797 | ||
798 | return (HZ / 16); /* ~60 ms */ | |
799 | } | |
800 | ||
922c943d SM |
801 | static void ath_chanctx_switch(struct ath_softc *sc, struct ath_chanctx *ctx, |
802 | struct cfg80211_chan_def *chandef) | |
803 | { | |
804 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
805 | ||
806 | spin_lock_bh(&sc->chan_lock); | |
807 | ||
808 | if (test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) && | |
809 | (sc->cur_chan != ctx) && (ctx == &sc->offchannel.chan)) { | |
da0162f3 SM |
810 | if (chandef) |
811 | ctx->chandef = *chandef; | |
cbc775db SM |
812 | |
813 | sc->sched.offchannel_pending = true; | |
814 | sc->sched.wait_switch = true; | |
815 | sc->sched.offchannel_duration = | |
816 | jiffies_to_usecs(sc->offchannel.duration) + | |
817 | sc->sched.channel_switch_time; | |
818 | ||
922c943d | 819 | spin_unlock_bh(&sc->chan_lock); |
da0162f3 SM |
820 | ath_dbg(common, CHAN_CTX, |
821 | "Set offchannel_pending to true\n"); | |
922c943d SM |
822 | return; |
823 | } | |
824 | ||
825 | sc->next_chan = ctx; | |
826 | if (chandef) { | |
827 | ctx->chandef = *chandef; | |
828 | ath_dbg(common, CHAN_CTX, | |
829 | "Assigned next_chan to %d MHz\n", chandef->center_freq1); | |
830 | } | |
831 | ||
832 | if (sc->next_chan == &sc->offchannel.chan) { | |
833 | sc->sched.offchannel_duration = | |
bb628eb9 | 834 | jiffies_to_usecs(sc->offchannel.duration) + |
922c943d SM |
835 | sc->sched.channel_switch_time; |
836 | ||
837 | if (chandef) { | |
838 | ath_dbg(common, CHAN_CTX, | |
839 | "Offchannel duration for chan %d MHz : %u\n", | |
840 | chandef->center_freq1, | |
841 | sc->sched.offchannel_duration); | |
842 | } | |
843 | } | |
844 | spin_unlock_bh(&sc->chan_lock); | |
845 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
846 | } | |
847 | ||
344ae6ab SM |
848 | static void ath_chanctx_offchan_switch(struct ath_softc *sc, |
849 | struct ieee80211_channel *chan) | |
850 | { | |
851 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
852 | struct cfg80211_chan_def chandef; | |
853 | ||
854 | cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); | |
855 | ath_dbg(common, CHAN_CTX, | |
856 | "Channel definition created: %d MHz\n", chandef.center_freq1); | |
857 | ||
858 | ath_chanctx_switch(sc, &sc->offchannel.chan, &chandef); | |
859 | } | |
860 | ||
98f411b8 SM |
861 | static struct ath_chanctx *ath_chanctx_get_oper_chan(struct ath_softc *sc, |
862 | bool active) | |
863 | { | |
864 | struct ath_chanctx *ctx; | |
865 | ||
866 | ath_for_each_chanctx(sc, ctx) { | |
867 | if (!ctx->assigned || list_empty(&ctx->vifs)) | |
868 | continue; | |
869 | if (active && !ctx->active) | |
870 | continue; | |
871 | ||
872 | if (ctx->switch_after_beacon) | |
873 | return ctx; | |
874 | } | |
875 | ||
876 | return &sc->chanctx[0]; | |
877 | } | |
878 | ||
dfcbb3e8 SM |
879 | static void |
880 | ath_scan_next_channel(struct ath_softc *sc) | |
881 | { | |
bc81d43a | 882 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
dfcbb3e8 SM |
883 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; |
884 | struct ieee80211_channel *chan; | |
885 | ||
886 | if (sc->offchannel.scan_idx >= req->n_channels) { | |
bc81d43a | 887 | ath_dbg(common, CHAN_CTX, |
878066e7 SM |
888 | "Moving offchannel state to ATH_OFFCHANNEL_IDLE, " |
889 | "scan_idx: %d, n_channels: %d\n", | |
bc81d43a SM |
890 | sc->offchannel.scan_idx, |
891 | req->n_channels); | |
892 | ||
dfcbb3e8 SM |
893 | sc->offchannel.state = ATH_OFFCHANNEL_IDLE; |
894 | ath_chanctx_switch(sc, ath_chanctx_get_oper_chan(sc, false), | |
895 | NULL); | |
896 | return; | |
897 | } | |
898 | ||
bc81d43a | 899 | ath_dbg(common, CHAN_CTX, |
878066e7 | 900 | "Moving offchannel state to ATH_OFFCHANNEL_PROBE_SEND, scan_idx: %d\n", |
bc81d43a SM |
901 | sc->offchannel.scan_idx); |
902 | ||
dfcbb3e8 SM |
903 | chan = req->channels[sc->offchannel.scan_idx++]; |
904 | sc->offchannel.duration = ath_scan_channel_duration(sc, chan); | |
905 | sc->offchannel.state = ATH_OFFCHANNEL_PROBE_SEND; | |
bc81d43a | 906 | |
dfcbb3e8 SM |
907 | ath_chanctx_offchan_switch(sc, chan); |
908 | } | |
909 | ||
910 | void ath_offchannel_next(struct ath_softc *sc) | |
911 | { | |
912 | struct ieee80211_vif *vif; | |
913 | ||
914 | if (sc->offchannel.scan_req) { | |
915 | vif = sc->offchannel.scan_vif; | |
916 | sc->offchannel.chan.txpower = vif->bss_conf.txpower; | |
917 | ath_scan_next_channel(sc); | |
918 | } else if (sc->offchannel.roc_vif) { | |
919 | vif = sc->offchannel.roc_vif; | |
920 | sc->offchannel.chan.txpower = vif->bss_conf.txpower; | |
bb628eb9 SM |
921 | sc->offchannel.duration = |
922 | msecs_to_jiffies(sc->offchannel.roc_duration); | |
dfcbb3e8 SM |
923 | sc->offchannel.state = ATH_OFFCHANNEL_ROC_START; |
924 | ath_chanctx_offchan_switch(sc, sc->offchannel.roc_chan); | |
925 | } else { | |
e21a1d8b SM |
926 | spin_lock_bh(&sc->chan_lock); |
927 | sc->sched.offchannel_pending = false; | |
928 | sc->sched.wait_switch = false; | |
929 | spin_unlock_bh(&sc->chan_lock); | |
930 | ||
dfcbb3e8 SM |
931 | ath_chanctx_switch(sc, ath_chanctx_get_oper_chan(sc, false), |
932 | NULL); | |
933 | sc->offchannel.state = ATH_OFFCHANNEL_IDLE; | |
934 | if (sc->ps_idle) | |
935 | ath_cancel_work(sc); | |
936 | } | |
937 | } | |
938 | ||
d83520b7 | 939 | void ath_roc_complete(struct ath_softc *sc, enum ath_roc_complete_reason reason) |
dfcbb3e8 | 940 | { |
4b60af4a SM |
941 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
942 | ||
d83520b7 JD |
943 | sc->offchannel.roc_vif = NULL; |
944 | sc->offchannel.roc_chan = NULL; | |
945 | ||
946 | switch (reason) { | |
947 | case ATH_ROC_COMPLETE_ABORT: | |
4b60af4a | 948 | ath_dbg(common, CHAN_CTX, "RoC aborted\n"); |
d83520b7 JD |
949 | ieee80211_remain_on_channel_expired(sc->hw); |
950 | break; | |
951 | case ATH_ROC_COMPLETE_EXPIRE: | |
4b60af4a | 952 | ath_dbg(common, CHAN_CTX, "RoC expired\n"); |
d83520b7 JD |
953 | ieee80211_remain_on_channel_expired(sc->hw); |
954 | break; | |
955 | case ATH_ROC_COMPLETE_CANCEL: | |
956 | ath_dbg(common, CHAN_CTX, "RoC canceled\n"); | |
957 | break; | |
958 | } | |
4b60af4a | 959 | |
dfcbb3e8 SM |
960 | ath_offchannel_next(sc); |
961 | ath9k_ps_restore(sc); | |
962 | } | |
963 | ||
964 | void ath_scan_complete(struct ath_softc *sc, bool abort) | |
965 | { | |
966 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
7947d3e0 AS |
967 | struct cfg80211_scan_info info = { |
968 | .aborted = abort, | |
969 | }; | |
dfcbb3e8 | 970 | |
bc81d43a SM |
971 | if (abort) |
972 | ath_dbg(common, CHAN_CTX, "HW scan aborted\n"); | |
973 | else | |
974 | ath_dbg(common, CHAN_CTX, "HW scan complete\n"); | |
975 | ||
dfcbb3e8 SM |
976 | sc->offchannel.scan_req = NULL; |
977 | sc->offchannel.scan_vif = NULL; | |
978 | sc->offchannel.state = ATH_OFFCHANNEL_IDLE; | |
7947d3e0 | 979 | ieee80211_scan_completed(sc->hw, &info); |
dfcbb3e8 | 980 | clear_bit(ATH_OP_SCANNING, &common->op_flags); |
d0975edd SM |
981 | spin_lock_bh(&sc->chan_lock); |
982 | if (test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) | |
983 | sc->sched.force_noa_update = true; | |
984 | spin_unlock_bh(&sc->chan_lock); | |
dfcbb3e8 SM |
985 | ath_offchannel_next(sc); |
986 | ath9k_ps_restore(sc); | |
987 | } | |
988 | ||
989 | static void ath_scan_send_probe(struct ath_softc *sc, | |
990 | struct cfg80211_ssid *ssid) | |
991 | { | |
992 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; | |
993 | struct ieee80211_vif *vif = sc->offchannel.scan_vif; | |
994 | struct ath_tx_control txctl = {}; | |
995 | struct sk_buff *skb; | |
996 | struct ieee80211_tx_info *info; | |
997 | int band = sc->offchannel.chan.chandef.chan->band; | |
998 | ||
a344d677 | 999 | skb = ieee80211_probereq_get(sc->hw, vif->addr, |
dfcbb3e8 SM |
1000 | ssid->ssid, ssid->ssid_len, req->ie_len); |
1001 | if (!skb) | |
1002 | return; | |
1003 | ||
1004 | info = IEEE80211_SKB_CB(skb); | |
1005 | if (req->no_cck) | |
1006 | info->flags |= IEEE80211_TX_CTL_NO_CCK_RATE; | |
1007 | ||
1008 | if (req->ie_len) | |
59ae1d12 | 1009 | skb_put_data(skb, req->ie, req->ie_len); |
dfcbb3e8 SM |
1010 | |
1011 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
1012 | ||
1013 | if (!ieee80211_tx_prepare_skb(sc->hw, vif, skb, band, NULL)) | |
1014 | goto error; | |
1015 | ||
1016 | txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO]; | |
dfcbb3e8 SM |
1017 | if (ath_tx_start(sc->hw, skb, &txctl)) |
1018 | goto error; | |
1019 | ||
1020 | return; | |
1021 | ||
1022 | error: | |
1023 | ieee80211_free_txskb(sc->hw, skb); | |
1024 | } | |
1025 | ||
1026 | static void ath_scan_channel_start(struct ath_softc *sc) | |
1027 | { | |
bc81d43a | 1028 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
dfcbb3e8 SM |
1029 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; |
1030 | int i; | |
1031 | ||
1032 | if (!(sc->cur_chan->chandef.chan->flags & IEEE80211_CHAN_NO_IR) && | |
1033 | req->n_ssids) { | |
1034 | for (i = 0; i < req->n_ssids; i++) | |
1035 | ath_scan_send_probe(sc, &req->ssids[i]); | |
1036 | ||
1037 | } | |
1038 | ||
bc81d43a | 1039 | ath_dbg(common, CHAN_CTX, |
878066e7 | 1040 | "Moving offchannel state to ATH_OFFCHANNEL_PROBE_WAIT\n"); |
bc81d43a | 1041 | |
dfcbb3e8 SM |
1042 | sc->offchannel.state = ATH_OFFCHANNEL_PROBE_WAIT; |
1043 | mod_timer(&sc->offchannel.timer, jiffies + sc->offchannel.duration); | |
1044 | } | |
1045 | ||
7ac76764 | 1046 | static void ath_chanctx_timer(struct timer_list *t) |
705d0bf8 | 1047 | { |
7ac76764 | 1048 | struct ath_softc *sc = from_timer(sc, t, sched.timer); |
878066e7 SM |
1049 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
1050 | ||
1051 | ath_dbg(common, CHAN_CTX, | |
1052 | "Channel context timer invoked\n"); | |
705d0bf8 SM |
1053 | |
1054 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_TSF_TIMER); | |
1055 | } | |
1056 | ||
7ac76764 | 1057 | static void ath_offchannel_timer(struct timer_list *t) |
dfcbb3e8 | 1058 | { |
7ac76764 | 1059 | struct ath_softc *sc = from_timer(sc, t, offchannel.timer); |
dfcbb3e8 | 1060 | struct ath_chanctx *ctx; |
bc81d43a SM |
1061 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
1062 | ||
878066e7 | 1063 | ath_dbg(common, CHAN_CTX, "%s: offchannel state: %s\n", |
bc81d43a | 1064 | __func__, offchannel_state_string(sc->offchannel.state)); |
dfcbb3e8 SM |
1065 | |
1066 | switch (sc->offchannel.state) { | |
1067 | case ATH_OFFCHANNEL_PROBE_WAIT: | |
1068 | if (!sc->offchannel.scan_req) | |
1069 | return; | |
1070 | ||
1071 | /* get first active channel context */ | |
1072 | ctx = ath_chanctx_get_oper_chan(sc, true); | |
1073 | if (ctx->active) { | |
878066e7 SM |
1074 | ath_dbg(common, CHAN_CTX, |
1075 | "Switch to oper/active context, " | |
1076 | "move offchannel state to ATH_OFFCHANNEL_SUSPEND\n"); | |
1077 | ||
dfcbb3e8 SM |
1078 | sc->offchannel.state = ATH_OFFCHANNEL_SUSPEND; |
1079 | ath_chanctx_switch(sc, ctx, NULL); | |
1080 | mod_timer(&sc->offchannel.timer, jiffies + HZ / 10); | |
1081 | break; | |
1082 | } | |
1083 | /* fall through */ | |
1084 | case ATH_OFFCHANNEL_SUSPEND: | |
1085 | if (!sc->offchannel.scan_req) | |
1086 | return; | |
1087 | ||
1088 | ath_scan_next_channel(sc); | |
1089 | break; | |
1090 | case ATH_OFFCHANNEL_ROC_START: | |
1091 | case ATH_OFFCHANNEL_ROC_WAIT: | |
dfcbb3e8 | 1092 | sc->offchannel.state = ATH_OFFCHANNEL_ROC_DONE; |
d83520b7 | 1093 | ath_roc_complete(sc, ATH_ROC_COMPLETE_EXPIRE); |
dfcbb3e8 SM |
1094 | break; |
1095 | default: | |
1096 | break; | |
1097 | } | |
1098 | } | |
2471adff | 1099 | |
6d7cbd77 SM |
1100 | static bool |
1101 | ath_chanctx_send_vif_ps_frame(struct ath_softc *sc, struct ath_vif *avp, | |
1102 | bool powersave) | |
1103 | { | |
1104 | struct ieee80211_vif *vif = avp->vif; | |
1105 | struct ieee80211_sta *sta = NULL; | |
1106 | struct ieee80211_hdr_3addr *nullfunc; | |
1107 | struct ath_tx_control txctl; | |
1108 | struct sk_buff *skb; | |
1109 | int band = sc->cur_chan->chandef.chan->band; | |
1110 | ||
1111 | switch (vif->type) { | |
1112 | case NL80211_IFTYPE_STATION: | |
cb35582a | 1113 | if (!avp->assoc) |
6d7cbd77 SM |
1114 | return false; |
1115 | ||
7b6ddeaf | 1116 | skb = ieee80211_nullfunc_get(sc->hw, vif, false); |
6d7cbd77 SM |
1117 | if (!skb) |
1118 | return false; | |
1119 | ||
1120 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; | |
1121 | if (powersave) | |
1122 | nullfunc->frame_control |= | |
1123 | cpu_to_le16(IEEE80211_FCTL_PM); | |
1124 | ||
c1b7bea0 | 1125 | skb->priority = 7; |
6d7cbd77 SM |
1126 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); |
1127 | if (!ieee80211_tx_prepare_skb(sc->hw, vif, skb, band, &sta)) { | |
1128 | dev_kfree_skb_any(skb); | |
1129 | return false; | |
1130 | } | |
1131 | break; | |
1132 | default: | |
1133 | return false; | |
1134 | } | |
1135 | ||
1136 | memset(&txctl, 0, sizeof(txctl)); | |
1137 | txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO]; | |
1138 | txctl.sta = sta; | |
6d7cbd77 SM |
1139 | if (ath_tx_start(sc->hw, skb, &txctl)) { |
1140 | ieee80211_free_txskb(sc->hw, skb); | |
1141 | return false; | |
1142 | } | |
1143 | ||
1144 | return true; | |
1145 | } | |
1146 | ||
1147 | static bool | |
1148 | ath_chanctx_send_ps_frame(struct ath_softc *sc, bool powersave) | |
1149 | { | |
1150 | struct ath_vif *avp; | |
1151 | bool sent = false; | |
1152 | ||
1153 | rcu_read_lock(); | |
1154 | list_for_each_entry(avp, &sc->cur_chan->vifs, list) { | |
1155 | if (ath_chanctx_send_vif_ps_frame(sc, avp, powersave)) | |
1156 | sent = true; | |
1157 | } | |
1158 | rcu_read_unlock(); | |
1159 | ||
1160 | return sent; | |
1161 | } | |
1162 | ||
1163 | static bool ath_chanctx_defer_switch(struct ath_softc *sc) | |
1164 | { | |
878066e7 SM |
1165 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
1166 | ||
6d7cbd77 SM |
1167 | if (sc->cur_chan == &sc->offchannel.chan) |
1168 | return false; | |
1169 | ||
1170 | switch (sc->sched.state) { | |
1171 | case ATH_CHANCTX_STATE_SWITCH: | |
1172 | return false; | |
1173 | case ATH_CHANCTX_STATE_IDLE: | |
1174 | if (!sc->cur_chan->switch_after_beacon) | |
1175 | return false; | |
1176 | ||
878066e7 SM |
1177 | ath_dbg(common, CHAN_CTX, |
1178 | "Defer switch, set chanctx state to WAIT_FOR_BEACON\n"); | |
1179 | ||
6d7cbd77 SM |
1180 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; |
1181 | break; | |
1182 | default: | |
1183 | break; | |
1184 | } | |
1185 | ||
1186 | return true; | |
1187 | } | |
1188 | ||
55254eea SM |
1189 | static void ath_offchannel_channel_change(struct ath_softc *sc) |
1190 | { | |
1191 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
1192 | ||
878066e7 | 1193 | ath_dbg(common, CHAN_CTX, "%s: offchannel state: %s\n", |
55254eea SM |
1194 | __func__, offchannel_state_string(sc->offchannel.state)); |
1195 | ||
1196 | switch (sc->offchannel.state) { | |
1197 | case ATH_OFFCHANNEL_PROBE_SEND: | |
1198 | if (!sc->offchannel.scan_req) | |
1199 | return; | |
1200 | ||
1201 | if (sc->cur_chan->chandef.chan != | |
1202 | sc->offchannel.chan.chandef.chan) | |
1203 | return; | |
1204 | ||
1205 | ath_scan_channel_start(sc); | |
1206 | break; | |
1207 | case ATH_OFFCHANNEL_IDLE: | |
1208 | if (!sc->offchannel.scan_req) | |
1209 | return; | |
1210 | ||
1211 | ath_scan_complete(sc, false); | |
1212 | break; | |
1213 | case ATH_OFFCHANNEL_ROC_START: | |
1214 | if (sc->cur_chan != &sc->offchannel.chan) | |
1215 | break; | |
1216 | ||
1217 | sc->offchannel.state = ATH_OFFCHANNEL_ROC_WAIT; | |
bb628eb9 SM |
1218 | mod_timer(&sc->offchannel.timer, |
1219 | jiffies + sc->offchannel.duration); | |
55254eea SM |
1220 | ieee80211_ready_on_channel(sc->hw); |
1221 | break; | |
1222 | case ATH_OFFCHANNEL_ROC_DONE: | |
55254eea SM |
1223 | break; |
1224 | default: | |
1225 | break; | |
1226 | } | |
1227 | } | |
1228 | ||
6d7cbd77 SM |
1229 | void ath_chanctx_set_next(struct ath_softc *sc, bool force) |
1230 | { | |
878066e7 | 1231 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e2cba8d7 | 1232 | struct ath_chanctx *old_ctx; |
6d7cbd77 SM |
1233 | struct timespec ts; |
1234 | bool measure_time = false; | |
1235 | bool send_ps = false; | |
e2cba8d7 | 1236 | bool queues_stopped = false; |
6d7cbd77 SM |
1237 | |
1238 | spin_lock_bh(&sc->chan_lock); | |
1239 | if (!sc->next_chan) { | |
1240 | spin_unlock_bh(&sc->chan_lock); | |
1241 | return; | |
1242 | } | |
1243 | ||
1244 | if (!force && ath_chanctx_defer_switch(sc)) { | |
1245 | spin_unlock_bh(&sc->chan_lock); | |
1246 | return; | |
1247 | } | |
1248 | ||
878066e7 SM |
1249 | ath_dbg(common, CHAN_CTX, |
1250 | "%s: current: %d MHz, next: %d MHz\n", | |
1251 | __func__, | |
1252 | sc->cur_chan->chandef.center_freq1, | |
1253 | sc->next_chan->chandef.center_freq1); | |
1254 | ||
6d7cbd77 | 1255 | if (sc->cur_chan != sc->next_chan) { |
878066e7 SM |
1256 | ath_dbg(common, CHAN_CTX, |
1257 | "Stopping current chanctx: %d\n", | |
1258 | sc->cur_chan->chandef.center_freq1); | |
6d7cbd77 SM |
1259 | sc->cur_chan->stopped = true; |
1260 | spin_unlock_bh(&sc->chan_lock); | |
1261 | ||
1262 | if (sc->next_chan == &sc->offchannel.chan) { | |
1263 | getrawmonotonic(&ts); | |
1264 | measure_time = true; | |
1265 | } | |
e2cba8d7 SM |
1266 | |
1267 | ath9k_chanctx_stop_queues(sc, sc->cur_chan); | |
1268 | queues_stopped = true; | |
1269 | ||
25f3bc7d | 1270 | __ath9k_flush(sc->hw, ~0, true, false, false); |
6d7cbd77 SM |
1271 | |
1272 | if (ath_chanctx_send_ps_frame(sc, true)) | |
e2d389b5 | 1273 | __ath9k_flush(sc->hw, BIT(IEEE80211_AC_VO), |
25f3bc7d | 1274 | false, false, false); |
6d7cbd77 SM |
1275 | |
1276 | send_ps = true; | |
1277 | spin_lock_bh(&sc->chan_lock); | |
1278 | ||
1279 | if (sc->cur_chan != &sc->offchannel.chan) { | |
1280 | getrawmonotonic(&sc->cur_chan->tsf_ts); | |
1281 | sc->cur_chan->tsf_val = ath9k_hw_gettsf64(sc->sc_ah); | |
1282 | } | |
1283 | } | |
e2cba8d7 | 1284 | old_ctx = sc->cur_chan; |
6d7cbd77 SM |
1285 | sc->cur_chan = sc->next_chan; |
1286 | sc->cur_chan->stopped = false; | |
1287 | sc->next_chan = NULL; | |
124130d7 SM |
1288 | |
1289 | if (!sc->sched.offchannel_pending) | |
1290 | sc->sched.offchannel_duration = 0; | |
1291 | ||
6d7cbd77 SM |
1292 | if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE) |
1293 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
1294 | ||
1295 | spin_unlock_bh(&sc->chan_lock); | |
1296 | ||
1297 | if (sc->sc_ah->chip_fullsleep || | |
1298 | memcmp(&sc->cur_chandef, &sc->cur_chan->chandef, | |
1299 | sizeof(sc->cur_chandef))) { | |
878066e7 SM |
1300 | ath_dbg(common, CHAN_CTX, |
1301 | "%s: Set channel %d MHz\n", | |
1302 | __func__, sc->cur_chan->chandef.center_freq1); | |
6d7cbd77 SM |
1303 | ath_set_channel(sc); |
1304 | if (measure_time) | |
1305 | sc->sched.channel_switch_time = | |
1306 | ath9k_hw_get_tsf_offset(&ts, NULL); | |
e2cba8d7 SM |
1307 | /* |
1308 | * A reset will ensure that all queues are woken up, | |
1309 | * so there is no need to awaken them again. | |
1310 | */ | |
1311 | goto out; | |
6d7cbd77 | 1312 | } |
e2cba8d7 SM |
1313 | |
1314 | if (queues_stopped) | |
1315 | ath9k_chanctx_wake_queues(sc, old_ctx); | |
1316 | out: | |
6d7cbd77 SM |
1317 | if (send_ps) |
1318 | ath_chanctx_send_ps_frame(sc, false); | |
1319 | ||
1320 | ath_offchannel_channel_change(sc); | |
1321 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_SWITCH); | |
1322 | } | |
1323 | ||
0e62f8b7 SM |
1324 | static void ath_chanctx_work(struct work_struct *work) |
1325 | { | |
1326 | struct ath_softc *sc = container_of(work, struct ath_softc, | |
1327 | chanctx_work); | |
1328 | mutex_lock(&sc->mutex); | |
1329 | ath_chanctx_set_next(sc, false); | |
1330 | mutex_unlock(&sc->mutex); | |
1331 | } | |
1332 | ||
e90e302a SM |
1333 | void ath9k_offchannel_init(struct ath_softc *sc) |
1334 | { | |
1335 | struct ath_chanctx *ctx; | |
1336 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
1337 | struct ieee80211_supported_band *sband; | |
1338 | struct ieee80211_channel *chan; | |
1339 | int i; | |
1340 | ||
57fbcce3 | 1341 | sband = &common->sbands[NL80211_BAND_2GHZ]; |
e90e302a | 1342 | if (!sband->n_channels) |
57fbcce3 | 1343 | sband = &common->sbands[NL80211_BAND_5GHZ]; |
e90e302a SM |
1344 | |
1345 | chan = &sband->channels[0]; | |
1346 | ||
1347 | ctx = &sc->offchannel.chan; | |
1348 | INIT_LIST_HEAD(&ctx->vifs); | |
1349 | ctx->txpower = ATH_TXPOWER_MAX; | |
1350 | cfg80211_chandef_create(&ctx->chandef, chan, NL80211_CHAN_HT20); | |
1351 | ||
63fefa05 THJ |
1352 | for (i = 0; i < ARRAY_SIZE(ctx->acq); i++) { |
1353 | INIT_LIST_HEAD(&ctx->acq[i].acq_new); | |
1354 | INIT_LIST_HEAD(&ctx->acq[i].acq_old); | |
1355 | spin_lock_init(&ctx->acq[i].lock); | |
1356 | } | |
e90e302a SM |
1357 | |
1358 | sc->offchannel.chan.offchannel = true; | |
1359 | } | |
1360 | ||
705d0bf8 SM |
1361 | void ath9k_init_channel_context(struct ath_softc *sc) |
1362 | { | |
1363 | INIT_WORK(&sc->chanctx_work, ath_chanctx_work); | |
1364 | ||
7ac76764 KC |
1365 | timer_setup(&sc->offchannel.timer, ath_offchannel_timer, 0); |
1366 | timer_setup(&sc->sched.timer, ath_chanctx_timer, 0); | |
c6500ea2 SM |
1367 | |
1368 | init_completion(&sc->go_beacon); | |
705d0bf8 | 1369 | } |
c7dd40c9 | 1370 | |
ea22df29 SM |
1371 | void ath9k_deinit_channel_context(struct ath_softc *sc) |
1372 | { | |
1373 | cancel_work_sync(&sc->chanctx_work); | |
1374 | } | |
1375 | ||
499afacc SM |
1376 | bool ath9k_is_chanctx_enabled(void) |
1377 | { | |
1378 | return (ath9k_use_chanctx == 1); | |
1379 | } | |
1380 | ||
0e08b5fb SM |
1381 | /********************/ |
1382 | /* Queue management */ | |
1383 | /********************/ | |
1384 | ||
a064eaa1 SM |
1385 | void ath9k_chanctx_stop_queues(struct ath_softc *sc, struct ath_chanctx *ctx) |
1386 | { | |
1387 | struct ath_hw *ah = sc->sc_ah; | |
1388 | int i; | |
1389 | ||
1390 | if (ctx == &sc->offchannel.chan) { | |
1391 | ieee80211_stop_queue(sc->hw, | |
1392 | sc->hw->offchannel_tx_hw_queue); | |
1393 | } else { | |
1394 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
1395 | ieee80211_stop_queue(sc->hw, | |
1396 | ctx->hw_queue_base + i); | |
1397 | } | |
1398 | ||
1399 | if (ah->opmode == NL80211_IFTYPE_AP) | |
1400 | ieee80211_stop_queue(sc->hw, sc->hw->queues - 2); | |
1401 | } | |
1402 | ||
1403 | ||
b3903153 | 1404 | void ath9k_chanctx_wake_queues(struct ath_softc *sc, struct ath_chanctx *ctx) |
0e08b5fb SM |
1405 | { |
1406 | struct ath_hw *ah = sc->sc_ah; | |
1407 | int i; | |
1408 | ||
b3903153 | 1409 | if (ctx == &sc->offchannel.chan) { |
0e08b5fb SM |
1410 | ieee80211_wake_queue(sc->hw, |
1411 | sc->hw->offchannel_tx_hw_queue); | |
1412 | } else { | |
1413 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
1414 | ieee80211_wake_queue(sc->hw, | |
b3903153 | 1415 | ctx->hw_queue_base + i); |
0e08b5fb SM |
1416 | } |
1417 | ||
1418 | if (ah->opmode == NL80211_IFTYPE_AP) | |
1419 | ieee80211_wake_queue(sc->hw, sc->hw->queues - 2); | |
1420 | } | |
1421 | ||
c7dd40c9 SM |
1422 | /*****************/ |
1423 | /* P2P Powersave */ | |
1424 | /*****************/ | |
1425 | ||
1426 | static void ath9k_update_p2p_ps_timer(struct ath_softc *sc, struct ath_vif *avp) | |
2471adff | 1427 | { |
58bb9ca8 | 1428 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
2471adff | 1429 | struct ath_hw *ah = sc->sc_ah; |
631c45f4 | 1430 | u32 tsf, target_tsf; |
2471adff SM |
1431 | |
1432 | if (!avp || !avp->noa.has_next_tsf) | |
1433 | return; | |
1434 | ||
1435 | ath9k_hw_gen_timer_stop(ah, sc->p2p_ps_timer); | |
1436 | ||
1437 | tsf = ath9k_hw_gettsf32(sc->sc_ah); | |
1438 | ||
1439 | target_tsf = avp->noa.next_tsf; | |
1440 | if (!avp->noa.absent) | |
1441 | target_tsf -= ATH_P2P_PS_STOP_TIME; | |
b77b59ae JD |
1442 | else |
1443 | target_tsf += ATH_P2P_PS_STOP_TIME; | |
2471adff SM |
1444 | |
1445 | if (target_tsf - tsf < ATH_P2P_PS_STOP_TIME) | |
1446 | target_tsf = tsf + ATH_P2P_PS_STOP_TIME; | |
1447 | ||
58bb9ca8 JD |
1448 | ath_dbg(common, CHAN_CTX, "%s absent %d tsf 0x%08X next_tsf 0x%08X (%dms)\n", |
1449 | __func__, avp->noa.absent, tsf, target_tsf, | |
1450 | (target_tsf - tsf) / 1000); | |
1451 | ||
631c45f4 | 1452 | ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, target_tsf, 1000000); |
2471adff SM |
1453 | } |
1454 | ||
c7dd40c9 SM |
1455 | static void ath9k_update_p2p_ps(struct ath_softc *sc, struct ieee80211_vif *vif) |
1456 | { | |
1457 | struct ath_vif *avp = (void *)vif->drv_priv; | |
1458 | u32 tsf; | |
1459 | ||
1460 | if (!sc->p2p_ps_timer) | |
1461 | return; | |
1462 | ||
b9a9693f | 1463 | if (vif->type != NL80211_IFTYPE_STATION) |
c7dd40c9 SM |
1464 | return; |
1465 | ||
1466 | sc->p2p_ps_vif = avp; | |
b10b7fb3 JD |
1467 | |
1468 | if (sc->ps_flags & PS_BEACON_SYNC) | |
1469 | return; | |
1470 | ||
c7dd40c9 SM |
1471 | tsf = ath9k_hw_gettsf32(sc->sc_ah); |
1472 | ieee80211_parse_p2p_noa(&vif->bss_conf.p2p_noa_attr, &avp->noa, tsf); | |
1473 | ath9k_update_p2p_ps_timer(sc, avp); | |
1474 | } | |
1475 | ||
fdcf1bd4 SM |
1476 | static u8 ath9k_get_ctwin(struct ath_softc *sc, struct ath_vif *avp) |
1477 | { | |
1478 | struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon; | |
1479 | u8 switch_time, ctwin; | |
1480 | ||
1481 | /* | |
1482 | * Channel switch in multi-channel mode is deferred | |
1483 | * by a quarter beacon interval when handling | |
1484 | * ATH_CHANCTX_EVENT_BEACON_PREPARE, so the P2P-GO | |
1485 | * interface is guaranteed to be discoverable | |
1486 | * for that duration after a TBTT. | |
1487 | */ | |
1488 | switch_time = cur_conf->beacon_interval / 4; | |
1489 | ||
1490 | ctwin = avp->vif->bss_conf.p2p_noa_attr.oppps_ctwindow; | |
1491 | if (ctwin && (ctwin < switch_time)) | |
1492 | return ctwin; | |
1493 | ||
1494 | if (switch_time < P2P_DEFAULT_CTWIN) | |
1495 | return 0; | |
1496 | ||
1497 | return P2P_DEFAULT_CTWIN; | |
1498 | } | |
1499 | ||
11e39a4e SM |
1500 | void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp, |
1501 | struct sk_buff *skb) | |
1502 | { | |
1503 | static const u8 noa_ie_hdr[] = { | |
1504 | WLAN_EID_VENDOR_SPECIFIC, /* type */ | |
1505 | 0, /* length */ | |
1506 | 0x50, 0x6f, 0x9a, /* WFA OUI */ | |
1507 | 0x09, /* P2P subtype */ | |
1508 | 0x0c, /* Notice of Absence */ | |
1509 | 0x00, /* LSB of little-endian len */ | |
1510 | 0x00, /* MSB of little-endian len */ | |
1511 | }; | |
1512 | ||
1513 | struct ieee80211_p2p_noa_attr *noa; | |
1514 | int noa_len, noa_desc, i = 0; | |
1515 | u8 *hdr; | |
1516 | ||
d0975edd | 1517 | if (!avp->offchannel_duration && !avp->noa_duration) |
11e39a4e SM |
1518 | return; |
1519 | ||
d0975edd | 1520 | noa_desc = !!avp->offchannel_duration + !!avp->noa_duration; |
11e39a4e SM |
1521 | noa_len = 2 + sizeof(struct ieee80211_p2p_noa_desc) * noa_desc; |
1522 | ||
59ae1d12 | 1523 | hdr = skb_put_data(skb, noa_ie_hdr, sizeof(noa_ie_hdr)); |
11e39a4e SM |
1524 | hdr[1] = sizeof(noa_ie_hdr) + noa_len - 2; |
1525 | hdr[7] = noa_len; | |
1526 | ||
b080db58 | 1527 | noa = skb_put_zero(skb, noa_len); |
11e39a4e SM |
1528 | |
1529 | noa->index = avp->noa_index; | |
fdcf1bd4 | 1530 | noa->oppps_ctwindow = ath9k_get_ctwin(sc, avp); |
3edbf0ba JD |
1531 | if (noa->oppps_ctwindow) |
1532 | noa->oppps_ctwindow |= BIT(7); | |
fdcf1bd4 | 1533 | |
d0975edd SM |
1534 | if (avp->noa_duration) { |
1535 | if (avp->periodic_noa) { | |
1536 | u32 interval = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); | |
1537 | noa->desc[i].count = 255; | |
1538 | noa->desc[i].interval = cpu_to_le32(interval); | |
1539 | } else { | |
1540 | noa->desc[i].count = 1; | |
1541 | } | |
11e39a4e | 1542 | |
d0975edd SM |
1543 | noa->desc[i].start_time = cpu_to_le32(avp->noa_start); |
1544 | noa->desc[i].duration = cpu_to_le32(avp->noa_duration); | |
11e39a4e SM |
1545 | i++; |
1546 | } | |
1547 | ||
1548 | if (avp->offchannel_duration) { | |
1549 | noa->desc[i].count = 1; | |
1550 | noa->desc[i].start_time = cpu_to_le32(avp->offchannel_start); | |
1551 | noa->desc[i].duration = cpu_to_le32(avp->offchannel_duration); | |
1552 | } | |
1553 | } | |
1554 | ||
2471adff SM |
1555 | void ath9k_p2p_ps_timer(void *priv) |
1556 | { | |
1557 | struct ath_softc *sc = priv; | |
1558 | struct ath_vif *avp = sc->p2p_ps_vif; | |
1559 | struct ieee80211_vif *vif; | |
1560 | struct ieee80211_sta *sta; | |
1561 | struct ath_node *an; | |
1562 | u32 tsf; | |
1563 | ||
1564 | del_timer_sync(&sc->sched.timer); | |
1565 | ath9k_hw_gen_timer_stop(sc->sc_ah, sc->p2p_ps_timer); | |
1566 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_TSF_TIMER); | |
1567 | ||
1568 | if (!avp || avp->chanctx != sc->cur_chan) | |
1569 | return; | |
1570 | ||
1571 | tsf = ath9k_hw_gettsf32(sc->sc_ah); | |
1572 | if (!avp->noa.absent) | |
1573 | tsf += ATH_P2P_PS_STOP_TIME; | |
b77b59ae JD |
1574 | else |
1575 | tsf -= ATH_P2P_PS_STOP_TIME; | |
2471adff SM |
1576 | |
1577 | if (!avp->noa.has_next_tsf || | |
1578 | avp->noa.next_tsf - tsf > BIT(31)) | |
1579 | ieee80211_update_p2p_noa(&avp->noa, tsf); | |
1580 | ||
1581 | ath9k_update_p2p_ps_timer(sc, avp); | |
1582 | ||
1583 | rcu_read_lock(); | |
1584 | ||
1585 | vif = avp->vif; | |
cb35582a | 1586 | sta = ieee80211_find_sta(vif, avp->bssid); |
2471adff SM |
1587 | if (!sta) |
1588 | goto out; | |
1589 | ||
1590 | an = (void *) sta->drv_priv; | |
1591 | if (an->sleeping == !!avp->noa.absent) | |
1592 | goto out; | |
1593 | ||
1594 | an->sleeping = avp->noa.absent; | |
1595 | if (an->sleeping) | |
1596 | ath_tx_aggr_sleep(sta, sc, an); | |
1597 | else | |
1598 | ath_tx_aggr_wakeup(sc, an); | |
1599 | ||
1600 | out: | |
1601 | rcu_read_unlock(); | |
1602 | } | |
1603 | ||
c7dd40c9 SM |
1604 | void ath9k_p2p_bss_info_changed(struct ath_softc *sc, |
1605 | struct ieee80211_vif *vif) | |
1606 | { | |
1607 | unsigned long flags; | |
1608 | ||
1609 | spin_lock_bh(&sc->sc_pcu_lock); | |
1610 | spin_lock_irqsave(&sc->sc_pm_lock, flags); | |
b10b7fb3 | 1611 | ath9k_update_p2p_ps(sc, vif); |
c7dd40c9 SM |
1612 | spin_unlock_irqrestore(&sc->sc_pm_lock, flags); |
1613 | spin_unlock_bh(&sc->sc_pcu_lock); | |
1614 | } | |
1615 | ||
1616 | void ath9k_p2p_beacon_sync(struct ath_softc *sc) | |
1617 | { | |
1618 | if (sc->p2p_ps_vif) | |
1619 | ath9k_update_p2p_ps(sc, sc->p2p_ps_vif->vif); | |
1620 | } | |
1621 | ||
1622 | void ath9k_p2p_remove_vif(struct ath_softc *sc, | |
1623 | struct ieee80211_vif *vif) | |
2471adff SM |
1624 | { |
1625 | struct ath_vif *avp = (void *)vif->drv_priv; | |
2471adff | 1626 | |
c7dd40c9 SM |
1627 | spin_lock_bh(&sc->sc_pcu_lock); |
1628 | if (avp == sc->p2p_ps_vif) { | |
1629 | sc->p2p_ps_vif = NULL; | |
1630 | ath9k_update_p2p_ps_timer(sc, NULL); | |
1631 | } | |
1632 | spin_unlock_bh(&sc->sc_pcu_lock); | |
1633 | } | |
1634 | ||
1635 | int ath9k_init_p2p(struct ath_softc *sc) | |
1636 | { | |
1637 | sc->p2p_ps_timer = ath_gen_timer_alloc(sc->sc_ah, ath9k_p2p_ps_timer, | |
1638 | NULL, sc, AR_FIRST_NDP_TIMER); | |
2471adff | 1639 | if (!sc->p2p_ps_timer) |
c7dd40c9 | 1640 | return -ENOMEM; |
2471adff | 1641 | |
c7dd40c9 SM |
1642 | return 0; |
1643 | } | |
2471adff | 1644 | |
c7dd40c9 SM |
1645 | void ath9k_deinit_p2p(struct ath_softc *sc) |
1646 | { | |
1647 | if (sc->p2p_ps_timer) | |
1648 | ath_gen_timer_free(sc->sc_ah, sc->p2p_ps_timer); | |
2471adff | 1649 | } |
c7dd40c9 SM |
1650 | |
1651 | #endif /* CONFIG_ATH9K_CHANNEL_CONTEXT */ |