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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 FF |
109 | |
110 | sband = &common->sbands[IEEE80211_BAND_2GHZ]; | |
111 | if (!sband->n_channels) | |
112 | sband = &common->sbands[IEEE80211_BAND_5GHZ]; | |
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 | ||
a09798f4 SM |
229 | void ath_chanctx_check_active(struct ath_softc *sc, struct ath_chanctx *ctx) |
230 | { | |
231 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
67259d51 | 232 | struct ath_chanctx *ictx; |
a09798f4 SM |
233 | struct ath_vif *avp; |
234 | bool active = false; | |
235 | u8 n_active = 0; | |
236 | ||
237 | if (!ctx) | |
238 | return; | |
239 | ||
290c8a77 SM |
240 | if (ctx == &sc->offchannel.chan) { |
241 | spin_lock_bh(&sc->chan_lock); | |
242 | ||
243 | if (likely(sc->sched.channel_switch_time)) | |
244 | ctx->flush_timeout = | |
245 | usecs_to_jiffies(sc->sched.channel_switch_time); | |
246 | else | |
247 | ctx->flush_timeout = | |
248 | msecs_to_jiffies(10); | |
249 | ||
250 | spin_unlock_bh(&sc->chan_lock); | |
251 | ||
252 | /* | |
253 | * There is no need to iterate over the | |
254 | * active/assigned channel contexts if | |
255 | * the current context is offchannel. | |
256 | */ | |
257 | return; | |
258 | } | |
259 | ||
67259d51 SM |
260 | ictx = ctx; |
261 | ||
a09798f4 SM |
262 | list_for_each_entry(avp, &ctx->vifs, list) { |
263 | struct ieee80211_vif *vif = avp->vif; | |
264 | ||
265 | switch (vif->type) { | |
266 | case NL80211_IFTYPE_P2P_CLIENT: | |
267 | case NL80211_IFTYPE_STATION: | |
cb35582a | 268 | if (avp->assoc) |
a09798f4 SM |
269 | active = true; |
270 | break; | |
271 | default: | |
272 | active = true; | |
273 | break; | |
274 | } | |
275 | } | |
276 | ctx->active = active; | |
277 | ||
278 | ath_for_each_chanctx(sc, ctx) { | |
279 | if (!ctx->assigned || list_empty(&ctx->vifs)) | |
280 | continue; | |
281 | n_active++; | |
282 | } | |
283 | ||
67259d51 SM |
284 | spin_lock_bh(&sc->chan_lock); |
285 | ||
a09798f4 | 286 | if (n_active <= 1) { |
67259d51 | 287 | ictx->flush_timeout = HZ / 5; |
a09798f4 | 288 | clear_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags); |
67259d51 | 289 | spin_unlock_bh(&sc->chan_lock); |
a09798f4 SM |
290 | return; |
291 | } | |
67259d51 SM |
292 | |
293 | ictx->flush_timeout = usecs_to_jiffies(sc->sched.channel_switch_time); | |
294 | ||
295 | if (test_and_set_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) { | |
296 | spin_unlock_bh(&sc->chan_lock); | |
a09798f4 | 297 | return; |
67259d51 SM |
298 | } |
299 | ||
300 | spin_unlock_bh(&sc->chan_lock); | |
a09798f4 SM |
301 | |
302 | if (ath9k_is_chanctx_enabled()) { | |
303 | ath_chanctx_event(sc, NULL, | |
304 | ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL); | |
305 | } | |
306 | } | |
307 | ||
58b57375 FF |
308 | static struct ath_chanctx * |
309 | ath_chanctx_get_next(struct ath_softc *sc, struct ath_chanctx *ctx) | |
310 | { | |
311 | int idx = ctx - &sc->chanctx[0]; | |
312 | ||
313 | return &sc->chanctx[!idx]; | |
314 | } | |
315 | ||
316 | static void ath_chanctx_adjust_tbtt_delta(struct ath_softc *sc) | |
317 | { | |
318 | struct ath_chanctx *prev, *cur; | |
319 | struct timespec ts; | |
320 | u32 cur_tsf, prev_tsf, beacon_int; | |
321 | s32 offset; | |
322 | ||
323 | beacon_int = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); | |
324 | ||
325 | cur = sc->cur_chan; | |
326 | prev = ath_chanctx_get_next(sc, cur); | |
327 | ||
7f30eac9 SM |
328 | if (!prev->switch_after_beacon) |
329 | return; | |
330 | ||
58b57375 FF |
331 | getrawmonotonic(&ts); |
332 | cur_tsf = (u32) cur->tsf_val + | |
333 | ath9k_hw_get_tsf_offset(&cur->tsf_ts, &ts); | |
334 | ||
335 | prev_tsf = prev->last_beacon - (u32) prev->tsf_val + cur_tsf; | |
336 | prev_tsf -= ath9k_hw_get_tsf_offset(&prev->tsf_ts, &ts); | |
337 | ||
338 | /* Adjust the TSF time of the AP chanctx to keep its beacons | |
339 | * at half beacon interval offset relative to the STA chanctx. | |
340 | */ | |
341 | offset = cur_tsf - prev_tsf; | |
342 | ||
343 | /* Ignore stale data or spurious timestamps */ | |
344 | if (offset < 0 || offset > 3 * beacon_int) | |
345 | return; | |
346 | ||
347 | offset = beacon_int / 2 - (offset % beacon_int); | |
348 | prev->tsf_val += offset; | |
349 | } | |
350 | ||
42eda115 FF |
351 | /* Configure the TSF based hardware timer for a channel switch. |
352 | * Also set up backup software timer, in case the gen timer fails. | |
353 | * This could be caused by a hardware reset. | |
354 | */ | |
355 | static void ath_chanctx_setup_timer(struct ath_softc *sc, u32 tsf_time) | |
356 | { | |
878066e7 | 357 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
42eda115 FF |
358 | struct ath_hw *ah = sc->sc_ah; |
359 | ||
360 | ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, tsf_time, 1000000); | |
361 | tsf_time -= ath9k_hw_gettsf32(ah); | |
362 | tsf_time = msecs_to_jiffies(tsf_time / 1000) + 1; | |
1a7c5b7e | 363 | mod_timer(&sc->sched.timer, jiffies + tsf_time); |
878066e7 SM |
364 | |
365 | ath_dbg(common, CHAN_CTX, | |
366 | "Setup chanctx timer with timeout: %d ms\n", jiffies_to_msecs(tsf_time)); | |
42eda115 FF |
367 | } |
368 | ||
828fe01a SM |
369 | static void ath_chanctx_handle_bmiss(struct ath_softc *sc, |
370 | struct ath_chanctx *ctx, | |
371 | struct ath_vif *avp) | |
372 | { | |
373 | /* | |
374 | * Clear the extend_absence flag if it had been | |
375 | * set during the previous beacon transmission, | |
376 | * since we need to revert to the normal NoA | |
377 | * schedule. | |
378 | */ | |
379 | if (ctx->active && sc->sched.extend_absence) { | |
380 | avp->noa_duration = 0; | |
381 | sc->sched.extend_absence = false; | |
382 | } | |
383 | ||
384 | /* If at least two consecutive beacons were missed on the STA | |
385 | * chanctx, stay on the STA channel for one extra beacon period, | |
386 | * to resync the timer properly. | |
387 | */ | |
388 | if (ctx->active && sc->sched.beacon_miss >= 2) { | |
389 | avp->noa_duration = 0; | |
390 | sc->sched.extend_absence = true; | |
391 | } | |
392 | } | |
393 | ||
a23152a8 SM |
394 | static void ath_chanctx_offchannel_noa(struct ath_softc *sc, |
395 | struct ath_chanctx *ctx, | |
396 | struct ath_vif *avp, | |
397 | u32 tsf_time) | |
398 | { | |
399 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
400 | ||
401 | avp->noa_index++; | |
402 | avp->offchannel_start = tsf_time; | |
403 | avp->offchannel_duration = sc->sched.offchannel_duration; | |
404 | ||
405 | ath_dbg(common, CHAN_CTX, | |
406 | "offchannel noa_duration: %d, noa_start: %d, noa_index: %d\n", | |
407 | avp->offchannel_duration, | |
408 | avp->offchannel_start, | |
409 | avp->noa_index); | |
410 | ||
411 | /* | |
412 | * When multiple contexts are active, the NoA | |
413 | * has to be recalculated and advertised after | |
414 | * an offchannel operation. | |
415 | */ | |
416 | if (ctx->active && avp->noa_duration) | |
417 | avp->noa_duration = 0; | |
418 | } | |
419 | ||
347a9566 SM |
420 | static void ath_chanctx_set_periodic_noa(struct ath_softc *sc, |
421 | struct ath_vif *avp, | |
422 | struct ath_beacon_config *cur_conf, | |
423 | u32 tsf_time, | |
424 | u32 beacon_int) | |
425 | { | |
426 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
427 | ||
428 | avp->noa_index++; | |
429 | avp->noa_start = tsf_time; | |
430 | ||
431 | if (sc->sched.extend_absence) | |
432 | avp->noa_duration = (3 * beacon_int / 2) + | |
433 | sc->sched.channel_switch_time; | |
434 | else | |
435 | avp->noa_duration = | |
436 | TU_TO_USEC(cur_conf->beacon_interval) / 2 + | |
437 | sc->sched.channel_switch_time; | |
438 | ||
439 | if (test_bit(ATH_OP_SCANNING, &common->op_flags) || | |
440 | sc->sched.extend_absence) | |
441 | avp->periodic_noa = false; | |
442 | else | |
443 | avp->periodic_noa = true; | |
444 | ||
445 | ath_dbg(common, CHAN_CTX, | |
446 | "noa_duration: %d, noa_start: %d, noa_index: %d, periodic: %d\n", | |
447 | avp->noa_duration, | |
448 | avp->noa_start, | |
449 | avp->noa_index, | |
450 | avp->periodic_noa); | |
451 | } | |
452 | ||
0a019a58 SM |
453 | static void ath_chanctx_set_oneshot_noa(struct ath_softc *sc, |
454 | struct ath_vif *avp, | |
455 | u32 tsf_time, | |
456 | u32 duration) | |
457 | { | |
458 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
459 | ||
460 | avp->noa_index++; | |
461 | avp->noa_start = tsf_time; | |
462 | avp->periodic_noa = false; | |
463 | avp->oneshot_noa = true; | |
464 | avp->noa_duration = duration + sc->sched.channel_switch_time; | |
465 | ||
466 | ath_dbg(common, CHAN_CTX, | |
467 | "oneshot noa_duration: %d, noa_start: %d, noa_index: %d, periodic: %d\n", | |
468 | avp->noa_duration, | |
469 | avp->noa_start, | |
470 | avp->noa_index, | |
471 | avp->periodic_noa); | |
472 | } | |
473 | ||
748299f2 FF |
474 | void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, |
475 | enum ath_chanctx_event ev) | |
476 | { | |
477 | struct ath_hw *ah = sc->sc_ah; | |
58b57375 | 478 | struct ath_common *common = ath9k_hw_common(ah); |
7414863e | 479 | struct ath_beacon_config *cur_conf; |
3ae07d39 | 480 | struct ath_vif *avp = NULL; |
73fa2f26 | 481 | struct ath_chanctx *ctx; |
748299f2 | 482 | u32 tsf_time; |
ec70abe1 | 483 | u32 beacon_int; |
3ae07d39 FF |
484 | |
485 | if (vif) | |
486 | avp = (struct ath_vif *) vif->drv_priv; | |
748299f2 FF |
487 | |
488 | spin_lock_bh(&sc->chan_lock); | |
489 | ||
878066e7 SM |
490 | ath_dbg(common, CHAN_CTX, "cur_chan: %d MHz, event: %s, state: %s\n", |
491 | sc->cur_chan->chandef.center_freq1, | |
492 | chanctx_event_string(ev), | |
493 | chanctx_state_string(sc->sched.state)); | |
494 | ||
748299f2 FF |
495 | switch (ev) { |
496 | case ATH_CHANCTX_EVENT_BEACON_PREPARE: | |
3ae07d39 FF |
497 | if (avp->offchannel_duration) |
498 | avp->offchannel_duration = 0; | |
499 | ||
0a019a58 SM |
500 | if (avp->oneshot_noa) { |
501 | avp->noa_duration = 0; | |
502 | avp->oneshot_noa = false; | |
503 | ||
504 | ath_dbg(common, CHAN_CTX, | |
505 | "Clearing oneshot NoA\n"); | |
506 | } | |
507 | ||
878066e7 SM |
508 | if (avp->chanctx != sc->cur_chan) { |
509 | ath_dbg(common, CHAN_CTX, | |
510 | "Contexts differ, not preparing beacon\n"); | |
73fa2f26 | 511 | break; |
878066e7 | 512 | } |
73fa2f26 | 513 | |
367b341e | 514 | if (sc->sched.offchannel_pending && !sc->sched.wait_switch) { |
73fa2f26 FF |
515 | sc->sched.offchannel_pending = false; |
516 | sc->next_chan = &sc->offchannel.chan; | |
517 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
878066e7 SM |
518 | ath_dbg(common, CHAN_CTX, |
519 | "Setting offchannel_pending to false\n"); | |
73fa2f26 FF |
520 | } |
521 | ||
522 | ctx = ath_chanctx_get_next(sc, sc->cur_chan); | |
523 | if (ctx->active && sc->sched.state == ATH_CHANCTX_STATE_IDLE) { | |
524 | sc->next_chan = ctx; | |
525 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
878066e7 SM |
526 | ath_dbg(common, CHAN_CTX, |
527 | "Set next context, move chanctx state to WAIT_FOR_BEACON\n"); | |
73fa2f26 FF |
528 | } |
529 | ||
530 | /* if the timer missed its window, use the next interval */ | |
878066e7 | 531 | if (sc->sched.state == ATH_CHANCTX_STATE_WAIT_FOR_TIMER) { |
73fa2f26 | 532 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; |
878066e7 SM |
533 | ath_dbg(common, CHAN_CTX, |
534 | "Move chanctx state from WAIT_FOR_TIMER to WAIT_FOR_BEACON\n"); | |
535 | } | |
73fa2f26 | 536 | |
c6500ea2 SM |
537 | if (sc->sched.mgd_prepare_tx) |
538 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; | |
539 | ||
8890d05f SM |
540 | /* |
541 | * When a context becomes inactive, for example, | |
542 | * disassociation of a station context, the NoA | |
543 | * attribute needs to be removed from subsequent | |
544 | * beacons. | |
545 | */ | |
546 | if (!ctx->active && avp->noa_duration && | |
547 | sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) { | |
548 | avp->noa_duration = 0; | |
549 | avp->periodic_noa = false; | |
550 | ||
551 | ath_dbg(common, CHAN_CTX, | |
552 | "Clearing NoA schedule\n"); | |
553 | } | |
554 | ||
748299f2 FF |
555 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) |
556 | break; | |
557 | ||
878066e7 SM |
558 | ath_dbg(common, CHAN_CTX, "Preparing beacon for vif: %pM\n", vif->addr); |
559 | ||
748299f2 FF |
560 | sc->sched.beacon_pending = true; |
561 | sc->sched.next_tbtt = REG_READ(ah, AR_NEXT_TBTT_TIMER); | |
3ae07d39 | 562 | |
7414863e | 563 | cur_conf = &sc->cur_chan->beacon; |
ec70abe1 FF |
564 | beacon_int = TU_TO_USEC(cur_conf->beacon_interval); |
565 | ||
3ae07d39 | 566 | /* defer channel switch by a quarter beacon interval */ |
ec70abe1 | 567 | tsf_time = sc->sched.next_tbtt + beacon_int / 4; |
3ae07d39 | 568 | sc->sched.switch_start_time = tsf_time; |
58b57375 | 569 | sc->cur_chan->last_beacon = sc->sched.next_tbtt; |
3ae07d39 | 570 | |
d0975edd SM |
571 | /* |
572 | * If an offchannel switch is scheduled to happen after | |
573 | * a beacon transmission, update the NoA with one-shot | |
574 | * values and increment the index. | |
575 | */ | |
576 | if (sc->next_chan == &sc->offchannel.chan) { | |
a23152a8 | 577 | ath_chanctx_offchannel_noa(sc, ctx, avp, tsf_time); |
d0975edd | 578 | break; |
3ae07d39 FF |
579 | } |
580 | ||
828fe01a | 581 | ath_chanctx_handle_bmiss(sc, ctx, avp); |
a2b28601 | 582 | |
0a019a58 SM |
583 | /* |
584 | * If a mgd_prepare_tx() has been called by mac80211, | |
585 | * a one-shot NoA needs to be sent. This can happen | |
586 | * with one or more active channel contexts - in both | |
587 | * cases, a new NoA schedule has to be advertised. | |
588 | */ | |
589 | if (sc->sched.mgd_prepare_tx) { | |
590 | ath_chanctx_set_oneshot_noa(sc, avp, tsf_time, | |
591 | jiffies_to_usecs(HZ / 5)); | |
592 | break; | |
593 | } | |
594 | ||
d0975edd SM |
595 | /* Prevent wrap-around issues */ |
596 | if (avp->noa_duration && tsf_time - avp->noa_start > BIT(30)) | |
597 | avp->noa_duration = 0; | |
598 | ||
599 | /* | |
600 | * If multiple contexts are active, start periodic | |
601 | * NoA and increment the index for the first | |
602 | * announcement. | |
603 | */ | |
604 | if (ctx->active && | |
347a9566 SM |
605 | (!avp->noa_duration || sc->sched.force_noa_update)) |
606 | ath_chanctx_set_periodic_noa(sc, avp, cur_conf, | |
607 | tsf_time, beacon_int); | |
d0975edd SM |
608 | |
609 | if (ctx->active && sc->sched.force_noa_update) | |
610 | sc->sched.force_noa_update = false; | |
878066e7 | 611 | |
748299f2 FF |
612 | break; |
613 | case ATH_CHANCTX_EVENT_BEACON_SENT: | |
878066e7 SM |
614 | if (!sc->sched.beacon_pending) { |
615 | ath_dbg(common, CHAN_CTX, | |
616 | "No pending beacon\n"); | |
748299f2 | 617 | break; |
878066e7 | 618 | } |
748299f2 FF |
619 | |
620 | sc->sched.beacon_pending = false; | |
c6500ea2 SM |
621 | |
622 | if (sc->sched.mgd_prepare_tx) { | |
623 | sc->sched.mgd_prepare_tx = false; | |
624 | complete(&sc->go_beacon); | |
625 | ath_dbg(common, CHAN_CTX, | |
626 | "Beacon sent, complete go_beacon\n"); | |
627 | break; | |
628 | } | |
629 | ||
748299f2 FF |
630 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_BEACON) |
631 | break; | |
632 | ||
878066e7 SM |
633 | ath_dbg(common, CHAN_CTX, |
634 | "Move chanctx state to WAIT_FOR_TIMER\n"); | |
635 | ||
748299f2 | 636 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; |
42eda115 | 637 | ath_chanctx_setup_timer(sc, sc->sched.switch_start_time); |
748299f2 FF |
638 | break; |
639 | case ATH_CHANCTX_EVENT_TSF_TIMER: | |
640 | if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_TIMER) | |
641 | break; | |
642 | ||
ec70abe1 FF |
643 | if (!sc->cur_chan->switch_after_beacon && |
644 | sc->sched.beacon_pending) | |
645 | sc->sched.beacon_miss++; | |
646 | ||
878066e7 SM |
647 | ath_dbg(common, CHAN_CTX, |
648 | "Move chanctx state to SWITCH\n"); | |
649 | ||
748299f2 FF |
650 | sc->sched.state = ATH_CHANCTX_STATE_SWITCH; |
651 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
652 | break; | |
58b57375 | 653 | case ATH_CHANCTX_EVENT_BEACON_RECEIVED: |
73fa2f26 FF |
654 | if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) || |
655 | sc->cur_chan == &sc->offchannel.chan) | |
58b57375 FF |
656 | break; |
657 | ||
ec70abe1 FF |
658 | sc->sched.beacon_pending = false; |
659 | sc->sched.beacon_miss = 0; | |
a899b678 | 660 | |
be247c1f | 661 | if (sc->sched.state == ATH_CHANCTX_STATE_FORCE_ACTIVE || |
d9092c98 | 662 | !sc->sched.beacon_adjust || |
be247c1f SM |
663 | !sc->cur_chan->tsf_val) |
664 | break; | |
665 | ||
666 | ath_chanctx_adjust_tbtt_delta(sc); | |
667 | ||
a899b678 FF |
668 | /* TSF time might have been updated by the incoming beacon, |
669 | * need update the channel switch timer to reflect the change. | |
670 | */ | |
671 | tsf_time = sc->sched.switch_start_time; | |
672 | tsf_time -= (u32) sc->cur_chan->tsf_val + | |
673 | ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, NULL); | |
674 | tsf_time += ath9k_hw_gettsf32(ah); | |
675 | ||
d9092c98 | 676 | sc->sched.beacon_adjust = false; |
42eda115 | 677 | ath_chanctx_setup_timer(sc, tsf_time); |
58b57375 | 678 | break; |
b8f9279b | 679 | case ATH_CHANCTX_EVENT_AUTHORIZED: |
73fa2f26 FF |
680 | if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE || |
681 | avp->chanctx != sc->cur_chan) | |
682 | break; | |
683 | ||
878066e7 SM |
684 | ath_dbg(common, CHAN_CTX, |
685 | "Move chanctx state from FORCE_ACTIVE to IDLE\n"); | |
686 | ||
73fa2f26 FF |
687 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; |
688 | /* fall through */ | |
689 | case ATH_CHANCTX_EVENT_SWITCH: | |
690 | if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) || | |
691 | sc->sched.state == ATH_CHANCTX_STATE_FORCE_ACTIVE || | |
692 | sc->cur_chan->switch_after_beacon || | |
693 | sc->cur_chan == &sc->offchannel.chan) | |
694 | break; | |
695 | ||
696 | /* If this is a station chanctx, stay active for a half | |
697 | * beacon period (minus channel switch time) | |
698 | */ | |
699 | sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan); | |
7414863e | 700 | cur_conf = &sc->cur_chan->beacon; |
73fa2f26 | 701 | |
878066e7 SM |
702 | ath_dbg(common, CHAN_CTX, |
703 | "Move chanctx state to WAIT_FOR_TIMER (event SWITCH)\n"); | |
704 | ||
73fa2f26 | 705 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; |
367b341e | 706 | sc->sched.wait_switch = false; |
ec70abe1 FF |
707 | |
708 | tsf_time = TU_TO_USEC(cur_conf->beacon_interval) / 2; | |
167bf96d SM |
709 | |
710 | if (sc->sched.extend_absence) { | |
ec70abe1 FF |
711 | sc->sched.beacon_miss = 0; |
712 | tsf_time *= 3; | |
713 | } | |
714 | ||
73fa2f26 | 715 | tsf_time -= sc->sched.channel_switch_time; |
ec70abe1 | 716 | tsf_time += ath9k_hw_gettsf32(sc->sc_ah); |
73fa2f26 FF |
717 | sc->sched.switch_start_time = tsf_time; |
718 | ||
42eda115 | 719 | ath_chanctx_setup_timer(sc, tsf_time); |
ec70abe1 | 720 | sc->sched.beacon_pending = true; |
d9092c98 | 721 | sc->sched.beacon_adjust = true; |
73fa2f26 FF |
722 | break; |
723 | case ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL: | |
724 | if (sc->cur_chan == &sc->offchannel.chan || | |
725 | sc->cur_chan->switch_after_beacon) | |
726 | break; | |
727 | ||
728 | sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan); | |
729 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
730 | break; | |
731 | case ATH_CHANCTX_EVENT_UNASSIGN: | |
732 | if (sc->cur_chan->assigned) { | |
733 | if (sc->next_chan && !sc->next_chan->assigned && | |
734 | sc->next_chan != &sc->offchannel.chan) | |
735 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
736 | break; | |
737 | } | |
738 | ||
739 | ctx = ath_chanctx_get_next(sc, sc->cur_chan); | |
740 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
741 | if (!ctx->assigned) | |
742 | break; | |
743 | ||
744 | sc->next_chan = ctx; | |
745 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
746 | break; | |
02da18b7 SM |
747 | case ATH_CHANCTX_EVENT_ASSIGN: |
748 | break; | |
749 | case ATH_CHANCTX_EVENT_CHANGE: | |
750 | break; | |
748299f2 FF |
751 | } |
752 | ||
753 | spin_unlock_bh(&sc->chan_lock); | |
754 | } | |
dfcbb3e8 | 755 | |
70b06dac SM |
756 | void ath_chanctx_beacon_sent_ev(struct ath_softc *sc, |
757 | enum ath_chanctx_event ev) | |
758 | { | |
759 | if (sc->sched.beacon_pending) | |
760 | ath_chanctx_event(sc, NULL, ev); | |
761 | } | |
762 | ||
a2b28601 | 763 | void ath_chanctx_beacon_recv_ev(struct ath_softc *sc, |
70b06dac SM |
764 | enum ath_chanctx_event ev) |
765 | { | |
70b06dac SM |
766 | ath_chanctx_event(sc, NULL, ev); |
767 | } | |
768 | ||
dfcbb3e8 SM |
769 | static int ath_scan_channel_duration(struct ath_softc *sc, |
770 | struct ieee80211_channel *chan) | |
771 | { | |
772 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; | |
773 | ||
774 | if (!req->n_ssids || (chan->flags & IEEE80211_CHAN_NO_IR)) | |
775 | return (HZ / 9); /* ~110 ms */ | |
776 | ||
777 | return (HZ / 16); /* ~60 ms */ | |
778 | } | |
779 | ||
922c943d SM |
780 | static void ath_chanctx_switch(struct ath_softc *sc, struct ath_chanctx *ctx, |
781 | struct cfg80211_chan_def *chandef) | |
782 | { | |
783 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
784 | ||
785 | spin_lock_bh(&sc->chan_lock); | |
786 | ||
787 | if (test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags) && | |
788 | (sc->cur_chan != ctx) && (ctx == &sc->offchannel.chan)) { | |
da0162f3 SM |
789 | if (chandef) |
790 | ctx->chandef = *chandef; | |
cbc775db SM |
791 | |
792 | sc->sched.offchannel_pending = true; | |
793 | sc->sched.wait_switch = true; | |
794 | sc->sched.offchannel_duration = | |
795 | jiffies_to_usecs(sc->offchannel.duration) + | |
796 | sc->sched.channel_switch_time; | |
797 | ||
922c943d | 798 | spin_unlock_bh(&sc->chan_lock); |
da0162f3 SM |
799 | ath_dbg(common, CHAN_CTX, |
800 | "Set offchannel_pending to true\n"); | |
922c943d SM |
801 | return; |
802 | } | |
803 | ||
804 | sc->next_chan = ctx; | |
805 | if (chandef) { | |
806 | ctx->chandef = *chandef; | |
807 | ath_dbg(common, CHAN_CTX, | |
808 | "Assigned next_chan to %d MHz\n", chandef->center_freq1); | |
809 | } | |
810 | ||
811 | if (sc->next_chan == &sc->offchannel.chan) { | |
812 | sc->sched.offchannel_duration = | |
bb628eb9 | 813 | jiffies_to_usecs(sc->offchannel.duration) + |
922c943d SM |
814 | sc->sched.channel_switch_time; |
815 | ||
816 | if (chandef) { | |
817 | ath_dbg(common, CHAN_CTX, | |
818 | "Offchannel duration for chan %d MHz : %u\n", | |
819 | chandef->center_freq1, | |
820 | sc->sched.offchannel_duration); | |
821 | } | |
822 | } | |
823 | spin_unlock_bh(&sc->chan_lock); | |
824 | ieee80211_queue_work(sc->hw, &sc->chanctx_work); | |
825 | } | |
826 | ||
344ae6ab SM |
827 | static void ath_chanctx_offchan_switch(struct ath_softc *sc, |
828 | struct ieee80211_channel *chan) | |
829 | { | |
830 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
831 | struct cfg80211_chan_def chandef; | |
832 | ||
833 | cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); | |
834 | ath_dbg(common, CHAN_CTX, | |
835 | "Channel definition created: %d MHz\n", chandef.center_freq1); | |
836 | ||
837 | ath_chanctx_switch(sc, &sc->offchannel.chan, &chandef); | |
838 | } | |
839 | ||
98f411b8 SM |
840 | static struct ath_chanctx *ath_chanctx_get_oper_chan(struct ath_softc *sc, |
841 | bool active) | |
842 | { | |
843 | struct ath_chanctx *ctx; | |
844 | ||
845 | ath_for_each_chanctx(sc, ctx) { | |
846 | if (!ctx->assigned || list_empty(&ctx->vifs)) | |
847 | continue; | |
848 | if (active && !ctx->active) | |
849 | continue; | |
850 | ||
851 | if (ctx->switch_after_beacon) | |
852 | return ctx; | |
853 | } | |
854 | ||
855 | return &sc->chanctx[0]; | |
856 | } | |
857 | ||
dfcbb3e8 SM |
858 | static void |
859 | ath_scan_next_channel(struct ath_softc *sc) | |
860 | { | |
bc81d43a | 861 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
dfcbb3e8 SM |
862 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; |
863 | struct ieee80211_channel *chan; | |
864 | ||
865 | if (sc->offchannel.scan_idx >= req->n_channels) { | |
bc81d43a | 866 | ath_dbg(common, CHAN_CTX, |
878066e7 SM |
867 | "Moving offchannel state to ATH_OFFCHANNEL_IDLE, " |
868 | "scan_idx: %d, n_channels: %d\n", | |
bc81d43a SM |
869 | sc->offchannel.scan_idx, |
870 | req->n_channels); | |
871 | ||
dfcbb3e8 SM |
872 | sc->offchannel.state = ATH_OFFCHANNEL_IDLE; |
873 | ath_chanctx_switch(sc, ath_chanctx_get_oper_chan(sc, false), | |
874 | NULL); | |
875 | return; | |
876 | } | |
877 | ||
bc81d43a | 878 | ath_dbg(common, CHAN_CTX, |
878066e7 | 879 | "Moving offchannel state to ATH_OFFCHANNEL_PROBE_SEND, scan_idx: %d\n", |
bc81d43a SM |
880 | sc->offchannel.scan_idx); |
881 | ||
dfcbb3e8 SM |
882 | chan = req->channels[sc->offchannel.scan_idx++]; |
883 | sc->offchannel.duration = ath_scan_channel_duration(sc, chan); | |
884 | sc->offchannel.state = ATH_OFFCHANNEL_PROBE_SEND; | |
bc81d43a | 885 | |
dfcbb3e8 SM |
886 | ath_chanctx_offchan_switch(sc, chan); |
887 | } | |
888 | ||
889 | void ath_offchannel_next(struct ath_softc *sc) | |
890 | { | |
891 | struct ieee80211_vif *vif; | |
892 | ||
893 | if (sc->offchannel.scan_req) { | |
894 | vif = sc->offchannel.scan_vif; | |
895 | sc->offchannel.chan.txpower = vif->bss_conf.txpower; | |
896 | ath_scan_next_channel(sc); | |
897 | } else if (sc->offchannel.roc_vif) { | |
898 | vif = sc->offchannel.roc_vif; | |
899 | sc->offchannel.chan.txpower = vif->bss_conf.txpower; | |
bb628eb9 SM |
900 | sc->offchannel.duration = |
901 | msecs_to_jiffies(sc->offchannel.roc_duration); | |
dfcbb3e8 SM |
902 | sc->offchannel.state = ATH_OFFCHANNEL_ROC_START; |
903 | ath_chanctx_offchan_switch(sc, sc->offchannel.roc_chan); | |
904 | } else { | |
e21a1d8b SM |
905 | spin_lock_bh(&sc->chan_lock); |
906 | sc->sched.offchannel_pending = false; | |
907 | sc->sched.wait_switch = false; | |
908 | spin_unlock_bh(&sc->chan_lock); | |
909 | ||
dfcbb3e8 SM |
910 | ath_chanctx_switch(sc, ath_chanctx_get_oper_chan(sc, false), |
911 | NULL); | |
912 | sc->offchannel.state = ATH_OFFCHANNEL_IDLE; | |
913 | if (sc->ps_idle) | |
914 | ath_cancel_work(sc); | |
915 | } | |
916 | } | |
917 | ||
918 | void ath_roc_complete(struct ath_softc *sc, bool abort) | |
919 | { | |
4b60af4a SM |
920 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
921 | ||
922 | if (abort) | |
923 | ath_dbg(common, CHAN_CTX, "RoC aborted\n"); | |
924 | else | |
925 | ath_dbg(common, CHAN_CTX, "RoC expired\n"); | |
926 | ||
dfcbb3e8 SM |
927 | sc->offchannel.roc_vif = NULL; |
928 | sc->offchannel.roc_chan = NULL; | |
a350335c | 929 | if (abort) |
dfcbb3e8 SM |
930 | ieee80211_remain_on_channel_expired(sc->hw); |
931 | ath_offchannel_next(sc); | |
932 | ath9k_ps_restore(sc); | |
933 | } | |
934 | ||
935 | void ath_scan_complete(struct ath_softc *sc, bool abort) | |
936 | { | |
937 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
938 | ||
bc81d43a SM |
939 | if (abort) |
940 | ath_dbg(common, CHAN_CTX, "HW scan aborted\n"); | |
941 | else | |
942 | ath_dbg(common, CHAN_CTX, "HW scan complete\n"); | |
943 | ||
dfcbb3e8 SM |
944 | sc->offchannel.scan_req = NULL; |
945 | sc->offchannel.scan_vif = NULL; | |
946 | sc->offchannel.state = ATH_OFFCHANNEL_IDLE; | |
947 | ieee80211_scan_completed(sc->hw, abort); | |
948 | clear_bit(ATH_OP_SCANNING, &common->op_flags); | |
d0975edd SM |
949 | spin_lock_bh(&sc->chan_lock); |
950 | if (test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) | |
951 | sc->sched.force_noa_update = true; | |
952 | spin_unlock_bh(&sc->chan_lock); | |
dfcbb3e8 SM |
953 | ath_offchannel_next(sc); |
954 | ath9k_ps_restore(sc); | |
955 | } | |
956 | ||
957 | static void ath_scan_send_probe(struct ath_softc *sc, | |
958 | struct cfg80211_ssid *ssid) | |
959 | { | |
960 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; | |
961 | struct ieee80211_vif *vif = sc->offchannel.scan_vif; | |
962 | struct ath_tx_control txctl = {}; | |
963 | struct sk_buff *skb; | |
964 | struct ieee80211_tx_info *info; | |
965 | int band = sc->offchannel.chan.chandef.chan->band; | |
966 | ||
967 | skb = ieee80211_probereq_get(sc->hw, vif, | |
968 | ssid->ssid, ssid->ssid_len, req->ie_len); | |
969 | if (!skb) | |
970 | return; | |
971 | ||
972 | info = IEEE80211_SKB_CB(skb); | |
973 | if (req->no_cck) | |
974 | info->flags |= IEEE80211_TX_CTL_NO_CCK_RATE; | |
975 | ||
976 | if (req->ie_len) | |
977 | memcpy(skb_put(skb, req->ie_len), req->ie, req->ie_len); | |
978 | ||
979 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
980 | ||
981 | if (!ieee80211_tx_prepare_skb(sc->hw, vif, skb, band, NULL)) | |
982 | goto error; | |
983 | ||
984 | txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO]; | |
985 | txctl.force_channel = true; | |
986 | if (ath_tx_start(sc->hw, skb, &txctl)) | |
987 | goto error; | |
988 | ||
989 | return; | |
990 | ||
991 | error: | |
992 | ieee80211_free_txskb(sc->hw, skb); | |
993 | } | |
994 | ||
995 | static void ath_scan_channel_start(struct ath_softc *sc) | |
996 | { | |
bc81d43a | 997 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
dfcbb3e8 SM |
998 | struct cfg80211_scan_request *req = sc->offchannel.scan_req; |
999 | int i; | |
1000 | ||
1001 | if (!(sc->cur_chan->chandef.chan->flags & IEEE80211_CHAN_NO_IR) && | |
1002 | req->n_ssids) { | |
1003 | for (i = 0; i < req->n_ssids; i++) | |
1004 | ath_scan_send_probe(sc, &req->ssids[i]); | |
1005 | ||
1006 | } | |
1007 | ||
bc81d43a | 1008 | ath_dbg(common, CHAN_CTX, |
878066e7 | 1009 | "Moving offchannel state to ATH_OFFCHANNEL_PROBE_WAIT\n"); |
bc81d43a | 1010 | |
dfcbb3e8 SM |
1011 | sc->offchannel.state = ATH_OFFCHANNEL_PROBE_WAIT; |
1012 | mod_timer(&sc->offchannel.timer, jiffies + sc->offchannel.duration); | |
1013 | } | |
1014 | ||
705d0bf8 SM |
1015 | static void ath_chanctx_timer(unsigned long data) |
1016 | { | |
1017 | struct ath_softc *sc = (struct ath_softc *) data; | |
878066e7 SM |
1018 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
1019 | ||
1020 | ath_dbg(common, CHAN_CTX, | |
1021 | "Channel context timer invoked\n"); | |
705d0bf8 SM |
1022 | |
1023 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_TSF_TIMER); | |
1024 | } | |
1025 | ||
1026 | static void ath_offchannel_timer(unsigned long data) | |
dfcbb3e8 SM |
1027 | { |
1028 | struct ath_softc *sc = (struct ath_softc *)data; | |
1029 | struct ath_chanctx *ctx; | |
bc81d43a SM |
1030 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
1031 | ||
878066e7 | 1032 | ath_dbg(common, CHAN_CTX, "%s: offchannel state: %s\n", |
bc81d43a | 1033 | __func__, offchannel_state_string(sc->offchannel.state)); |
dfcbb3e8 SM |
1034 | |
1035 | switch (sc->offchannel.state) { | |
1036 | case ATH_OFFCHANNEL_PROBE_WAIT: | |
1037 | if (!sc->offchannel.scan_req) | |
1038 | return; | |
1039 | ||
1040 | /* get first active channel context */ | |
1041 | ctx = ath_chanctx_get_oper_chan(sc, true); | |
1042 | if (ctx->active) { | |
878066e7 SM |
1043 | ath_dbg(common, CHAN_CTX, |
1044 | "Switch to oper/active context, " | |
1045 | "move offchannel state to ATH_OFFCHANNEL_SUSPEND\n"); | |
1046 | ||
dfcbb3e8 SM |
1047 | sc->offchannel.state = ATH_OFFCHANNEL_SUSPEND; |
1048 | ath_chanctx_switch(sc, ctx, NULL); | |
1049 | mod_timer(&sc->offchannel.timer, jiffies + HZ / 10); | |
1050 | break; | |
1051 | } | |
1052 | /* fall through */ | |
1053 | case ATH_OFFCHANNEL_SUSPEND: | |
1054 | if (!sc->offchannel.scan_req) | |
1055 | return; | |
1056 | ||
1057 | ath_scan_next_channel(sc); | |
1058 | break; | |
1059 | case ATH_OFFCHANNEL_ROC_START: | |
1060 | case ATH_OFFCHANNEL_ROC_WAIT: | |
1061 | ctx = ath_chanctx_get_oper_chan(sc, false); | |
1062 | sc->offchannel.state = ATH_OFFCHANNEL_ROC_DONE; | |
a350335c | 1063 | ieee80211_remain_on_channel_expired(sc->hw); |
dfcbb3e8 SM |
1064 | ath_chanctx_switch(sc, ctx, NULL); |
1065 | break; | |
1066 | default: | |
1067 | break; | |
1068 | } | |
1069 | } | |
2471adff | 1070 | |
6d7cbd77 SM |
1071 | static bool |
1072 | ath_chanctx_send_vif_ps_frame(struct ath_softc *sc, struct ath_vif *avp, | |
1073 | bool powersave) | |
1074 | { | |
1075 | struct ieee80211_vif *vif = avp->vif; | |
1076 | struct ieee80211_sta *sta = NULL; | |
1077 | struct ieee80211_hdr_3addr *nullfunc; | |
1078 | struct ath_tx_control txctl; | |
1079 | struct sk_buff *skb; | |
1080 | int band = sc->cur_chan->chandef.chan->band; | |
1081 | ||
1082 | switch (vif->type) { | |
1083 | case NL80211_IFTYPE_STATION: | |
cb35582a | 1084 | if (!avp->assoc) |
6d7cbd77 SM |
1085 | return false; |
1086 | ||
1087 | skb = ieee80211_nullfunc_get(sc->hw, vif); | |
1088 | if (!skb) | |
1089 | return false; | |
1090 | ||
1091 | nullfunc = (struct ieee80211_hdr_3addr *) skb->data; | |
1092 | if (powersave) | |
1093 | nullfunc->frame_control |= | |
1094 | cpu_to_le16(IEEE80211_FCTL_PM); | |
1095 | ||
1096 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
1097 | if (!ieee80211_tx_prepare_skb(sc->hw, vif, skb, band, &sta)) { | |
1098 | dev_kfree_skb_any(skb); | |
1099 | return false; | |
1100 | } | |
1101 | break; | |
1102 | default: | |
1103 | return false; | |
1104 | } | |
1105 | ||
1106 | memset(&txctl, 0, sizeof(txctl)); | |
1107 | txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO]; | |
1108 | txctl.sta = sta; | |
1109 | txctl.force_channel = true; | |
1110 | if (ath_tx_start(sc->hw, skb, &txctl)) { | |
1111 | ieee80211_free_txskb(sc->hw, skb); | |
1112 | return false; | |
1113 | } | |
1114 | ||
1115 | return true; | |
1116 | } | |
1117 | ||
1118 | static bool | |
1119 | ath_chanctx_send_ps_frame(struct ath_softc *sc, bool powersave) | |
1120 | { | |
1121 | struct ath_vif *avp; | |
1122 | bool sent = false; | |
1123 | ||
1124 | rcu_read_lock(); | |
1125 | list_for_each_entry(avp, &sc->cur_chan->vifs, list) { | |
1126 | if (ath_chanctx_send_vif_ps_frame(sc, avp, powersave)) | |
1127 | sent = true; | |
1128 | } | |
1129 | rcu_read_unlock(); | |
1130 | ||
1131 | return sent; | |
1132 | } | |
1133 | ||
1134 | static bool ath_chanctx_defer_switch(struct ath_softc *sc) | |
1135 | { | |
878066e7 SM |
1136 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
1137 | ||
6d7cbd77 SM |
1138 | if (sc->cur_chan == &sc->offchannel.chan) |
1139 | return false; | |
1140 | ||
1141 | switch (sc->sched.state) { | |
1142 | case ATH_CHANCTX_STATE_SWITCH: | |
1143 | return false; | |
1144 | case ATH_CHANCTX_STATE_IDLE: | |
1145 | if (!sc->cur_chan->switch_after_beacon) | |
1146 | return false; | |
1147 | ||
878066e7 SM |
1148 | ath_dbg(common, CHAN_CTX, |
1149 | "Defer switch, set chanctx state to WAIT_FOR_BEACON\n"); | |
1150 | ||
6d7cbd77 SM |
1151 | sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_BEACON; |
1152 | break; | |
1153 | default: | |
1154 | break; | |
1155 | } | |
1156 | ||
1157 | return true; | |
1158 | } | |
1159 | ||
55254eea SM |
1160 | static void ath_offchannel_channel_change(struct ath_softc *sc) |
1161 | { | |
1162 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
1163 | ||
878066e7 | 1164 | ath_dbg(common, CHAN_CTX, "%s: offchannel state: %s\n", |
55254eea SM |
1165 | __func__, offchannel_state_string(sc->offchannel.state)); |
1166 | ||
1167 | switch (sc->offchannel.state) { | |
1168 | case ATH_OFFCHANNEL_PROBE_SEND: | |
1169 | if (!sc->offchannel.scan_req) | |
1170 | return; | |
1171 | ||
1172 | if (sc->cur_chan->chandef.chan != | |
1173 | sc->offchannel.chan.chandef.chan) | |
1174 | return; | |
1175 | ||
1176 | ath_scan_channel_start(sc); | |
1177 | break; | |
1178 | case ATH_OFFCHANNEL_IDLE: | |
1179 | if (!sc->offchannel.scan_req) | |
1180 | return; | |
1181 | ||
1182 | ath_scan_complete(sc, false); | |
1183 | break; | |
1184 | case ATH_OFFCHANNEL_ROC_START: | |
1185 | if (sc->cur_chan != &sc->offchannel.chan) | |
1186 | break; | |
1187 | ||
1188 | sc->offchannel.state = ATH_OFFCHANNEL_ROC_WAIT; | |
bb628eb9 SM |
1189 | mod_timer(&sc->offchannel.timer, |
1190 | jiffies + sc->offchannel.duration); | |
55254eea SM |
1191 | ieee80211_ready_on_channel(sc->hw); |
1192 | break; | |
1193 | case ATH_OFFCHANNEL_ROC_DONE: | |
1194 | ath_roc_complete(sc, false); | |
1195 | break; | |
1196 | default: | |
1197 | break; | |
1198 | } | |
1199 | } | |
1200 | ||
6d7cbd77 SM |
1201 | void ath_chanctx_set_next(struct ath_softc *sc, bool force) |
1202 | { | |
878066e7 | 1203 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e2cba8d7 | 1204 | struct ath_chanctx *old_ctx; |
6d7cbd77 SM |
1205 | struct timespec ts; |
1206 | bool measure_time = false; | |
1207 | bool send_ps = false; | |
e2cba8d7 | 1208 | bool queues_stopped = false; |
6d7cbd77 SM |
1209 | |
1210 | spin_lock_bh(&sc->chan_lock); | |
1211 | if (!sc->next_chan) { | |
1212 | spin_unlock_bh(&sc->chan_lock); | |
1213 | return; | |
1214 | } | |
1215 | ||
1216 | if (!force && ath_chanctx_defer_switch(sc)) { | |
1217 | spin_unlock_bh(&sc->chan_lock); | |
1218 | return; | |
1219 | } | |
1220 | ||
878066e7 SM |
1221 | ath_dbg(common, CHAN_CTX, |
1222 | "%s: current: %d MHz, next: %d MHz\n", | |
1223 | __func__, | |
1224 | sc->cur_chan->chandef.center_freq1, | |
1225 | sc->next_chan->chandef.center_freq1); | |
1226 | ||
6d7cbd77 | 1227 | if (sc->cur_chan != sc->next_chan) { |
878066e7 SM |
1228 | ath_dbg(common, CHAN_CTX, |
1229 | "Stopping current chanctx: %d\n", | |
1230 | sc->cur_chan->chandef.center_freq1); | |
6d7cbd77 SM |
1231 | sc->cur_chan->stopped = true; |
1232 | spin_unlock_bh(&sc->chan_lock); | |
1233 | ||
1234 | if (sc->next_chan == &sc->offchannel.chan) { | |
1235 | getrawmonotonic(&ts); | |
1236 | measure_time = true; | |
1237 | } | |
e2cba8d7 SM |
1238 | |
1239 | ath9k_chanctx_stop_queues(sc, sc->cur_chan); | |
1240 | queues_stopped = true; | |
1241 | ||
25f3bc7d | 1242 | __ath9k_flush(sc->hw, ~0, true, false, false); |
6d7cbd77 SM |
1243 | |
1244 | if (ath_chanctx_send_ps_frame(sc, true)) | |
e2d389b5 | 1245 | __ath9k_flush(sc->hw, BIT(IEEE80211_AC_VO), |
25f3bc7d | 1246 | false, false, false); |
6d7cbd77 SM |
1247 | |
1248 | send_ps = true; | |
1249 | spin_lock_bh(&sc->chan_lock); | |
1250 | ||
1251 | if (sc->cur_chan != &sc->offchannel.chan) { | |
1252 | getrawmonotonic(&sc->cur_chan->tsf_ts); | |
1253 | sc->cur_chan->tsf_val = ath9k_hw_gettsf64(sc->sc_ah); | |
1254 | } | |
1255 | } | |
e2cba8d7 | 1256 | old_ctx = sc->cur_chan; |
6d7cbd77 SM |
1257 | sc->cur_chan = sc->next_chan; |
1258 | sc->cur_chan->stopped = false; | |
1259 | sc->next_chan = NULL; | |
124130d7 SM |
1260 | |
1261 | if (!sc->sched.offchannel_pending) | |
1262 | sc->sched.offchannel_duration = 0; | |
1263 | ||
6d7cbd77 SM |
1264 | if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE) |
1265 | sc->sched.state = ATH_CHANCTX_STATE_IDLE; | |
1266 | ||
1267 | spin_unlock_bh(&sc->chan_lock); | |
1268 | ||
1269 | if (sc->sc_ah->chip_fullsleep || | |
1270 | memcmp(&sc->cur_chandef, &sc->cur_chan->chandef, | |
1271 | sizeof(sc->cur_chandef))) { | |
878066e7 SM |
1272 | ath_dbg(common, CHAN_CTX, |
1273 | "%s: Set channel %d MHz\n", | |
1274 | __func__, sc->cur_chan->chandef.center_freq1); | |
6d7cbd77 SM |
1275 | ath_set_channel(sc); |
1276 | if (measure_time) | |
1277 | sc->sched.channel_switch_time = | |
1278 | ath9k_hw_get_tsf_offset(&ts, NULL); | |
e2cba8d7 SM |
1279 | /* |
1280 | * A reset will ensure that all queues are woken up, | |
1281 | * so there is no need to awaken them again. | |
1282 | */ | |
1283 | goto out; | |
6d7cbd77 | 1284 | } |
e2cba8d7 SM |
1285 | |
1286 | if (queues_stopped) | |
1287 | ath9k_chanctx_wake_queues(sc, old_ctx); | |
1288 | out: | |
6d7cbd77 SM |
1289 | if (send_ps) |
1290 | ath_chanctx_send_ps_frame(sc, false); | |
1291 | ||
1292 | ath_offchannel_channel_change(sc); | |
1293 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_SWITCH); | |
1294 | } | |
1295 | ||
0e62f8b7 SM |
1296 | static void ath_chanctx_work(struct work_struct *work) |
1297 | { | |
1298 | struct ath_softc *sc = container_of(work, struct ath_softc, | |
1299 | chanctx_work); | |
1300 | mutex_lock(&sc->mutex); | |
1301 | ath_chanctx_set_next(sc, false); | |
1302 | mutex_unlock(&sc->mutex); | |
1303 | } | |
1304 | ||
e90e302a SM |
1305 | void ath9k_offchannel_init(struct ath_softc *sc) |
1306 | { | |
1307 | struct ath_chanctx *ctx; | |
1308 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
1309 | struct ieee80211_supported_band *sband; | |
1310 | struct ieee80211_channel *chan; | |
1311 | int i; | |
1312 | ||
1313 | sband = &common->sbands[IEEE80211_BAND_2GHZ]; | |
1314 | if (!sband->n_channels) | |
1315 | sband = &common->sbands[IEEE80211_BAND_5GHZ]; | |
1316 | ||
1317 | chan = &sband->channels[0]; | |
1318 | ||
1319 | ctx = &sc->offchannel.chan; | |
1320 | INIT_LIST_HEAD(&ctx->vifs); | |
1321 | ctx->txpower = ATH_TXPOWER_MAX; | |
1322 | cfg80211_chandef_create(&ctx->chandef, chan, NL80211_CHAN_HT20); | |
1323 | ||
1324 | for (i = 0; i < ARRAY_SIZE(ctx->acq); i++) | |
1325 | INIT_LIST_HEAD(&ctx->acq[i]); | |
1326 | ||
1327 | sc->offchannel.chan.offchannel = true; | |
1328 | } | |
1329 | ||
705d0bf8 SM |
1330 | void ath9k_init_channel_context(struct ath_softc *sc) |
1331 | { | |
1332 | INIT_WORK(&sc->chanctx_work, ath_chanctx_work); | |
1333 | ||
1334 | setup_timer(&sc->offchannel.timer, ath_offchannel_timer, | |
1335 | (unsigned long)sc); | |
1336 | setup_timer(&sc->sched.timer, ath_chanctx_timer, | |
1337 | (unsigned long)sc); | |
c6500ea2 SM |
1338 | |
1339 | init_completion(&sc->go_beacon); | |
705d0bf8 | 1340 | } |
c7dd40c9 | 1341 | |
ea22df29 SM |
1342 | void ath9k_deinit_channel_context(struct ath_softc *sc) |
1343 | { | |
1344 | cancel_work_sync(&sc->chanctx_work); | |
1345 | } | |
1346 | ||
499afacc SM |
1347 | bool ath9k_is_chanctx_enabled(void) |
1348 | { | |
1349 | return (ath9k_use_chanctx == 1); | |
1350 | } | |
1351 | ||
0e08b5fb SM |
1352 | /********************/ |
1353 | /* Queue management */ | |
1354 | /********************/ | |
1355 | ||
a064eaa1 SM |
1356 | void ath9k_chanctx_stop_queues(struct ath_softc *sc, struct ath_chanctx *ctx) |
1357 | { | |
1358 | struct ath_hw *ah = sc->sc_ah; | |
1359 | int i; | |
1360 | ||
1361 | if (ctx == &sc->offchannel.chan) { | |
1362 | ieee80211_stop_queue(sc->hw, | |
1363 | sc->hw->offchannel_tx_hw_queue); | |
1364 | } else { | |
1365 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
1366 | ieee80211_stop_queue(sc->hw, | |
1367 | ctx->hw_queue_base + i); | |
1368 | } | |
1369 | ||
1370 | if (ah->opmode == NL80211_IFTYPE_AP) | |
1371 | ieee80211_stop_queue(sc->hw, sc->hw->queues - 2); | |
1372 | } | |
1373 | ||
1374 | ||
b3903153 | 1375 | void ath9k_chanctx_wake_queues(struct ath_softc *sc, struct ath_chanctx *ctx) |
0e08b5fb SM |
1376 | { |
1377 | struct ath_hw *ah = sc->sc_ah; | |
1378 | int i; | |
1379 | ||
b3903153 | 1380 | if (ctx == &sc->offchannel.chan) { |
0e08b5fb SM |
1381 | ieee80211_wake_queue(sc->hw, |
1382 | sc->hw->offchannel_tx_hw_queue); | |
1383 | } else { | |
1384 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
1385 | ieee80211_wake_queue(sc->hw, | |
b3903153 | 1386 | ctx->hw_queue_base + i); |
0e08b5fb SM |
1387 | } |
1388 | ||
1389 | if (ah->opmode == NL80211_IFTYPE_AP) | |
1390 | ieee80211_wake_queue(sc->hw, sc->hw->queues - 2); | |
1391 | } | |
1392 | ||
c7dd40c9 SM |
1393 | /*****************/ |
1394 | /* P2P Powersave */ | |
1395 | /*****************/ | |
1396 | ||
1397 | static void ath9k_update_p2p_ps_timer(struct ath_softc *sc, struct ath_vif *avp) | |
2471adff SM |
1398 | { |
1399 | struct ath_hw *ah = sc->sc_ah; | |
1400 | s32 tsf, target_tsf; | |
1401 | ||
1402 | if (!avp || !avp->noa.has_next_tsf) | |
1403 | return; | |
1404 | ||
1405 | ath9k_hw_gen_timer_stop(ah, sc->p2p_ps_timer); | |
1406 | ||
1407 | tsf = ath9k_hw_gettsf32(sc->sc_ah); | |
1408 | ||
1409 | target_tsf = avp->noa.next_tsf; | |
1410 | if (!avp->noa.absent) | |
1411 | target_tsf -= ATH_P2P_PS_STOP_TIME; | |
1412 | ||
1413 | if (target_tsf - tsf < ATH_P2P_PS_STOP_TIME) | |
1414 | target_tsf = tsf + ATH_P2P_PS_STOP_TIME; | |
1415 | ||
1416 | ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, (u32) target_tsf, 1000000); | |
1417 | } | |
1418 | ||
c7dd40c9 SM |
1419 | static void ath9k_update_p2p_ps(struct ath_softc *sc, struct ieee80211_vif *vif) |
1420 | { | |
1421 | struct ath_vif *avp = (void *)vif->drv_priv; | |
1422 | u32 tsf; | |
1423 | ||
1424 | if (!sc->p2p_ps_timer) | |
1425 | return; | |
1426 | ||
1427 | if (vif->type != NL80211_IFTYPE_STATION || !vif->p2p) | |
1428 | return; | |
1429 | ||
1430 | sc->p2p_ps_vif = avp; | |
1431 | tsf = ath9k_hw_gettsf32(sc->sc_ah); | |
1432 | ieee80211_parse_p2p_noa(&vif->bss_conf.p2p_noa_attr, &avp->noa, tsf); | |
1433 | ath9k_update_p2p_ps_timer(sc, avp); | |
1434 | } | |
1435 | ||
fdcf1bd4 SM |
1436 | static u8 ath9k_get_ctwin(struct ath_softc *sc, struct ath_vif *avp) |
1437 | { | |
1438 | struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon; | |
1439 | u8 switch_time, ctwin; | |
1440 | ||
1441 | /* | |
1442 | * Channel switch in multi-channel mode is deferred | |
1443 | * by a quarter beacon interval when handling | |
1444 | * ATH_CHANCTX_EVENT_BEACON_PREPARE, so the P2P-GO | |
1445 | * interface is guaranteed to be discoverable | |
1446 | * for that duration after a TBTT. | |
1447 | */ | |
1448 | switch_time = cur_conf->beacon_interval / 4; | |
1449 | ||
1450 | ctwin = avp->vif->bss_conf.p2p_noa_attr.oppps_ctwindow; | |
1451 | if (ctwin && (ctwin < switch_time)) | |
1452 | return ctwin; | |
1453 | ||
1454 | if (switch_time < P2P_DEFAULT_CTWIN) | |
1455 | return 0; | |
1456 | ||
1457 | return P2P_DEFAULT_CTWIN; | |
1458 | } | |
1459 | ||
11e39a4e SM |
1460 | void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp, |
1461 | struct sk_buff *skb) | |
1462 | { | |
1463 | static const u8 noa_ie_hdr[] = { | |
1464 | WLAN_EID_VENDOR_SPECIFIC, /* type */ | |
1465 | 0, /* length */ | |
1466 | 0x50, 0x6f, 0x9a, /* WFA OUI */ | |
1467 | 0x09, /* P2P subtype */ | |
1468 | 0x0c, /* Notice of Absence */ | |
1469 | 0x00, /* LSB of little-endian len */ | |
1470 | 0x00, /* MSB of little-endian len */ | |
1471 | }; | |
1472 | ||
1473 | struct ieee80211_p2p_noa_attr *noa; | |
1474 | int noa_len, noa_desc, i = 0; | |
1475 | u8 *hdr; | |
1476 | ||
d0975edd | 1477 | if (!avp->offchannel_duration && !avp->noa_duration) |
11e39a4e SM |
1478 | return; |
1479 | ||
d0975edd | 1480 | noa_desc = !!avp->offchannel_duration + !!avp->noa_duration; |
11e39a4e SM |
1481 | noa_len = 2 + sizeof(struct ieee80211_p2p_noa_desc) * noa_desc; |
1482 | ||
1483 | hdr = skb_put(skb, sizeof(noa_ie_hdr)); | |
1484 | memcpy(hdr, noa_ie_hdr, sizeof(noa_ie_hdr)); | |
1485 | hdr[1] = sizeof(noa_ie_hdr) + noa_len - 2; | |
1486 | hdr[7] = noa_len; | |
1487 | ||
1488 | noa = (void *) skb_put(skb, noa_len); | |
1489 | memset(noa, 0, noa_len); | |
1490 | ||
1491 | noa->index = avp->noa_index; | |
fdcf1bd4 SM |
1492 | noa->oppps_ctwindow = ath9k_get_ctwin(sc, avp); |
1493 | ||
d0975edd SM |
1494 | if (avp->noa_duration) { |
1495 | if (avp->periodic_noa) { | |
1496 | u32 interval = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); | |
1497 | noa->desc[i].count = 255; | |
1498 | noa->desc[i].interval = cpu_to_le32(interval); | |
1499 | } else { | |
1500 | noa->desc[i].count = 1; | |
1501 | } | |
11e39a4e | 1502 | |
d0975edd SM |
1503 | noa->desc[i].start_time = cpu_to_le32(avp->noa_start); |
1504 | noa->desc[i].duration = cpu_to_le32(avp->noa_duration); | |
11e39a4e SM |
1505 | i++; |
1506 | } | |
1507 | ||
1508 | if (avp->offchannel_duration) { | |
1509 | noa->desc[i].count = 1; | |
1510 | noa->desc[i].start_time = cpu_to_le32(avp->offchannel_start); | |
1511 | noa->desc[i].duration = cpu_to_le32(avp->offchannel_duration); | |
1512 | } | |
1513 | } | |
1514 | ||
2471adff SM |
1515 | void ath9k_p2p_ps_timer(void *priv) |
1516 | { | |
1517 | struct ath_softc *sc = priv; | |
1518 | struct ath_vif *avp = sc->p2p_ps_vif; | |
1519 | struct ieee80211_vif *vif; | |
1520 | struct ieee80211_sta *sta; | |
1521 | struct ath_node *an; | |
1522 | u32 tsf; | |
1523 | ||
1524 | del_timer_sync(&sc->sched.timer); | |
1525 | ath9k_hw_gen_timer_stop(sc->sc_ah, sc->p2p_ps_timer); | |
1526 | ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_TSF_TIMER); | |
1527 | ||
1528 | if (!avp || avp->chanctx != sc->cur_chan) | |
1529 | return; | |
1530 | ||
1531 | tsf = ath9k_hw_gettsf32(sc->sc_ah); | |
1532 | if (!avp->noa.absent) | |
1533 | tsf += ATH_P2P_PS_STOP_TIME; | |
1534 | ||
1535 | if (!avp->noa.has_next_tsf || | |
1536 | avp->noa.next_tsf - tsf > BIT(31)) | |
1537 | ieee80211_update_p2p_noa(&avp->noa, tsf); | |
1538 | ||
1539 | ath9k_update_p2p_ps_timer(sc, avp); | |
1540 | ||
1541 | rcu_read_lock(); | |
1542 | ||
1543 | vif = avp->vif; | |
cb35582a | 1544 | sta = ieee80211_find_sta(vif, avp->bssid); |
2471adff SM |
1545 | if (!sta) |
1546 | goto out; | |
1547 | ||
1548 | an = (void *) sta->drv_priv; | |
1549 | if (an->sleeping == !!avp->noa.absent) | |
1550 | goto out; | |
1551 | ||
1552 | an->sleeping = avp->noa.absent; | |
1553 | if (an->sleeping) | |
1554 | ath_tx_aggr_sleep(sta, sc, an); | |
1555 | else | |
1556 | ath_tx_aggr_wakeup(sc, an); | |
1557 | ||
1558 | out: | |
1559 | rcu_read_unlock(); | |
1560 | } | |
1561 | ||
c7dd40c9 SM |
1562 | void ath9k_p2p_bss_info_changed(struct ath_softc *sc, |
1563 | struct ieee80211_vif *vif) | |
1564 | { | |
1565 | unsigned long flags; | |
1566 | ||
1567 | spin_lock_bh(&sc->sc_pcu_lock); | |
1568 | spin_lock_irqsave(&sc->sc_pm_lock, flags); | |
1569 | if (!(sc->ps_flags & PS_BEACON_SYNC)) | |
1570 | ath9k_update_p2p_ps(sc, vif); | |
1571 | spin_unlock_irqrestore(&sc->sc_pm_lock, flags); | |
1572 | spin_unlock_bh(&sc->sc_pcu_lock); | |
1573 | } | |
1574 | ||
1575 | void ath9k_p2p_beacon_sync(struct ath_softc *sc) | |
1576 | { | |
1577 | if (sc->p2p_ps_vif) | |
1578 | ath9k_update_p2p_ps(sc, sc->p2p_ps_vif->vif); | |
1579 | } | |
1580 | ||
1581 | void ath9k_p2p_remove_vif(struct ath_softc *sc, | |
1582 | struct ieee80211_vif *vif) | |
2471adff SM |
1583 | { |
1584 | struct ath_vif *avp = (void *)vif->drv_priv; | |
2471adff | 1585 | |
c7dd40c9 SM |
1586 | spin_lock_bh(&sc->sc_pcu_lock); |
1587 | if (avp == sc->p2p_ps_vif) { | |
1588 | sc->p2p_ps_vif = NULL; | |
1589 | ath9k_update_p2p_ps_timer(sc, NULL); | |
1590 | } | |
1591 | spin_unlock_bh(&sc->sc_pcu_lock); | |
1592 | } | |
1593 | ||
1594 | int ath9k_init_p2p(struct ath_softc *sc) | |
1595 | { | |
1596 | sc->p2p_ps_timer = ath_gen_timer_alloc(sc->sc_ah, ath9k_p2p_ps_timer, | |
1597 | NULL, sc, AR_FIRST_NDP_TIMER); | |
2471adff | 1598 | if (!sc->p2p_ps_timer) |
c7dd40c9 | 1599 | return -ENOMEM; |
2471adff | 1600 | |
c7dd40c9 SM |
1601 | return 0; |
1602 | } | |
2471adff | 1603 | |
c7dd40c9 SM |
1604 | void ath9k_deinit_p2p(struct ath_softc *sc) |
1605 | { | |
1606 | if (sc->p2p_ps_timer) | |
1607 | ath_gen_timer_free(sc->sc_ah, sc->p2p_ps_timer); | |
2471adff | 1608 | } |
c7dd40c9 SM |
1609 | |
1610 | #endif /* CONFIG_ATH9K_CHANNEL_CONTEXT */ |