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