1 /*
2 * Copyright (c) 2008-2011 Atheros Communications 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 <linux/nl80211.h>
18 #include <linux/delay.h>
19 #include "ath9k.h"
20 #include "btcoex.h"
21
22 static void ath9k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
23 u32 queues, bool drop);
24
ath9k_parse_mpdudensity(u8 mpdudensity)25 u8 ath9k_parse_mpdudensity(u8 mpdudensity)
26 {
27 /*
28 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
29 * 0 for no restriction
30 * 1 for 1/4 us
31 * 2 for 1/2 us
32 * 3 for 1 us
33 * 4 for 2 us
34 * 5 for 4 us
35 * 6 for 8 us
36 * 7 for 16 us
37 */
38 switch (mpdudensity) {
39 case 0:
40 return 0;
41 case 1:
42 case 2:
43 case 3:
44 /* Our lower layer calculations limit our precision to
45 1 microsecond */
46 return 1;
47 case 4:
48 return 2;
49 case 5:
50 return 4;
51 case 6:
52 return 8;
53 case 7:
54 return 16;
55 default:
56 return 0;
57 }
58 }
59
ath9k_has_pending_frames(struct ath_softc * sc,struct ath_txq * txq,bool sw_pending)60 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq,
61 bool sw_pending)
62 {
63 bool pending = false;
64
65 spin_lock_bh(&txq->axq_lock);
66
67 if (txq->axq_depth) {
68 pending = true;
69 goto out;
70 }
71
72 if (!sw_pending)
73 goto out;
74
75 if (txq->mac80211_qnum >= 0) {
76 struct ath_acq *acq;
77
78 acq = &sc->cur_chan->acq[txq->mac80211_qnum];
79 if (!list_empty(&acq->acq_new) || !list_empty(&acq->acq_old))
80 pending = true;
81 }
82 out:
83 spin_unlock_bh(&txq->axq_lock);
84 return pending;
85 }
86
ath9k_setpower(struct ath_softc * sc,enum ath9k_power_mode mode)87 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
88 {
89 unsigned long flags;
90 bool ret;
91
92 spin_lock_irqsave(&sc->sc_pm_lock, flags);
93 ret = ath9k_hw_setpower(sc->sc_ah, mode);
94 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
95
96 return ret;
97 }
98
ath_ps_full_sleep(struct timer_list * t)99 void ath_ps_full_sleep(struct timer_list *t)
100 {
101 struct ath_softc *sc = from_timer(sc, t, sleep_timer);
102 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
103 unsigned long flags;
104 bool reset;
105
106 spin_lock_irqsave(&common->cc_lock, flags);
107 ath_hw_cycle_counters_update(common);
108 spin_unlock_irqrestore(&common->cc_lock, flags);
109
110 ath9k_hw_setrxabort(sc->sc_ah, 1);
111 ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
112
113 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
114 }
115
ath9k_ps_wakeup(struct ath_softc * sc)116 void ath9k_ps_wakeup(struct ath_softc *sc)
117 {
118 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
119 unsigned long flags;
120 enum ath9k_power_mode power_mode;
121
122 spin_lock_irqsave(&sc->sc_pm_lock, flags);
123 if (++sc->ps_usecount != 1)
124 goto unlock;
125
126 del_timer_sync(&sc->sleep_timer);
127 power_mode = sc->sc_ah->power_mode;
128 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
129
130 /*
131 * While the hardware is asleep, the cycle counters contain no
132 * useful data. Better clear them now so that they don't mess up
133 * survey data results.
134 */
135 if (power_mode != ATH9K_PM_AWAKE) {
136 spin_lock(&common->cc_lock);
137 ath_hw_cycle_counters_update(common);
138 memset(&common->cc, 0, sizeof(common->cc));
139 spin_unlock(&common->cc_lock);
140 }
141
142 unlock:
143 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
144 }
145
ath9k_ps_restore(struct ath_softc * sc)146 void ath9k_ps_restore(struct ath_softc *sc)
147 {
148 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
149 enum ath9k_power_mode mode;
150 unsigned long flags;
151
152 spin_lock_irqsave(&sc->sc_pm_lock, flags);
153 if (--sc->ps_usecount != 0)
154 goto unlock;
155
156 if (sc->ps_idle) {
157 mod_timer(&sc->sleep_timer, jiffies + HZ / 10);
158 goto unlock;
159 }
160
161 if (sc->ps_enabled &&
162 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
163 PS_WAIT_FOR_CAB |
164 PS_WAIT_FOR_PSPOLL_DATA |
165 PS_WAIT_FOR_TX_ACK |
166 PS_WAIT_FOR_ANI))) {
167 mode = ATH9K_PM_NETWORK_SLEEP;
168 if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
169 ath9k_btcoex_stop_gen_timer(sc);
170 } else {
171 goto unlock;
172 }
173
174 spin_lock(&common->cc_lock);
175 ath_hw_cycle_counters_update(common);
176 spin_unlock(&common->cc_lock);
177
178 ath9k_hw_setpower(sc->sc_ah, mode);
179
180 unlock:
181 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
182 }
183
__ath_cancel_work(struct ath_softc * sc)184 static void __ath_cancel_work(struct ath_softc *sc)
185 {
186 cancel_work_sync(&sc->paprd_work);
187 cancel_delayed_work_sync(&sc->hw_check_work);
188 cancel_delayed_work_sync(&sc->hw_pll_work);
189
190 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
191 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
192 cancel_work_sync(&sc->mci_work);
193 #endif
194 }
195
ath_cancel_work(struct ath_softc * sc)196 void ath_cancel_work(struct ath_softc *sc)
197 {
198 __ath_cancel_work(sc);
199 cancel_work_sync(&sc->hw_reset_work);
200 }
201
ath_restart_work(struct ath_softc * sc)202 void ath_restart_work(struct ath_softc *sc)
203 {
204 ieee80211_queue_delayed_work(sc->hw, &sc->hw_check_work,
205 msecs_to_jiffies(ATH_HW_CHECK_POLL_INT));
206
207 if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah))
208 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
209 msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
210
211 ath_start_ani(sc);
212 }
213
ath_prepare_reset(struct ath_softc * sc)214 static bool ath_prepare_reset(struct ath_softc *sc)
215 {
216 struct ath_hw *ah = sc->sc_ah;
217 bool ret = true;
218
219 ieee80211_stop_queues(sc->hw);
220 ath_stop_ani(sc);
221 ath9k_hw_disable_interrupts(ah);
222
223 if (AR_SREV_9300_20_OR_LATER(ah)) {
224 ret &= ath_stoprecv(sc);
225 ret &= ath_drain_all_txq(sc);
226 } else {
227 ret &= ath_drain_all_txq(sc);
228 ret &= ath_stoprecv(sc);
229 }
230
231 return ret;
232 }
233
ath_complete_reset(struct ath_softc * sc,bool start)234 static bool ath_complete_reset(struct ath_softc *sc, bool start)
235 {
236 struct ath_hw *ah = sc->sc_ah;
237 struct ath_common *common = ath9k_hw_common(ah);
238 unsigned long flags;
239
240 ath9k_calculate_summary_state(sc, sc->cur_chan);
241 ath_startrecv(sc);
242 ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
243 sc->cur_chan->txpower,
244 &sc->cur_chan->cur_txpower);
245 clear_bit(ATH_OP_HW_RESET, &common->op_flags);
246
247 if (!sc->cur_chan->offchannel && start) {
248 /* restore per chanctx TSF timer */
249 if (sc->cur_chan->tsf_val) {
250 u32 offset;
251
252 offset = ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts,
253 NULL);
254 ath9k_hw_settsf64(ah, sc->cur_chan->tsf_val + offset);
255 }
256
257
258 if (!test_bit(ATH_OP_BEACONS, &common->op_flags))
259 goto work;
260
261 if (ah->opmode == NL80211_IFTYPE_STATION &&
262 test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
263 spin_lock_irqsave(&sc->sc_pm_lock, flags);
264 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
265 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
266 } else {
267 ath9k_set_beacon(sc);
268 }
269 work:
270 ath_restart_work(sc);
271 ath_txq_schedule_all(sc);
272 }
273
274 sc->gtt_cnt = 0;
275
276 ath9k_hw_set_interrupts(ah);
277 ath9k_hw_enable_interrupts(ah);
278 ieee80211_wake_queues(sc->hw);
279 ath9k_p2p_ps_timer(sc);
280
281 return true;
282 }
283
ath_reset_internal(struct ath_softc * sc,struct ath9k_channel * hchan)284 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
285 {
286 struct ath_hw *ah = sc->sc_ah;
287 struct ath_common *common = ath9k_hw_common(ah);
288 struct ath9k_hw_cal_data *caldata = NULL;
289 bool fastcc = true;
290 int r;
291
292 __ath_cancel_work(sc);
293
294 disable_irq(sc->irq);
295 tasklet_disable(&sc->intr_tq);
296 tasklet_disable(&sc->bcon_tasklet);
297 spin_lock_bh(&sc->sc_pcu_lock);
298
299 if (!sc->cur_chan->offchannel) {
300 fastcc = false;
301 caldata = &sc->cur_chan->caldata;
302 }
303
304 if (!hchan) {
305 fastcc = false;
306 hchan = ah->curchan;
307 }
308
309 if (!hchan) {
310 fastcc = false;
311 hchan = ath9k_cmn_get_channel(sc->hw, ah, &sc->cur_chan->chandef);
312 }
313
314 if (!ath_prepare_reset(sc))
315 fastcc = false;
316
317 if (ath9k_is_chanctx_enabled())
318 fastcc = false;
319
320 spin_lock_bh(&sc->chan_lock);
321 sc->cur_chandef = sc->cur_chan->chandef;
322 spin_unlock_bh(&sc->chan_lock);
323
324 ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
325 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
326
327 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
328 if (r) {
329 ath_err(common,
330 "Unable to reset channel, reset status %d\n", r);
331
332 ath9k_hw_enable_interrupts(ah);
333 ath9k_queue_reset(sc, RESET_TYPE_BB_HANG);
334
335 goto out;
336 }
337
338 if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
339 sc->cur_chan->offchannel)
340 ath9k_mci_set_txpower(sc, true, false);
341
342 if (!ath_complete_reset(sc, true))
343 r = -EIO;
344
345 out:
346 enable_irq(sc->irq);
347 spin_unlock_bh(&sc->sc_pcu_lock);
348 tasklet_enable(&sc->bcon_tasklet);
349 tasklet_enable(&sc->intr_tq);
350
351 return r;
352 }
353
ath_node_attach(struct ath_softc * sc,struct ieee80211_sta * sta,struct ieee80211_vif * vif)354 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
355 struct ieee80211_vif *vif)
356 {
357 struct ath_node *an;
358 an = (struct ath_node *)sta->drv_priv;
359
360 an->sc = sc;
361 an->sta = sta;
362 an->vif = vif;
363 memset(&an->key_idx, 0, sizeof(an->key_idx));
364
365 ath_tx_node_init(sc, an);
366
367 ath_dynack_node_init(sc->sc_ah, an);
368 }
369
ath_node_detach(struct ath_softc * sc,struct ieee80211_sta * sta)370 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
371 {
372 struct ath_node *an = (struct ath_node *)sta->drv_priv;
373 ath_tx_node_cleanup(sc, an);
374
375 ath_dynack_node_deinit(sc->sc_ah, an);
376 }
377
ath9k_tasklet(struct tasklet_struct * t)378 void ath9k_tasklet(struct tasklet_struct *t)
379 {
380 struct ath_softc *sc = from_tasklet(sc, t, intr_tq);
381 struct ath_hw *ah = sc->sc_ah;
382 struct ath_common *common = ath9k_hw_common(ah);
383 enum ath_reset_type type;
384 unsigned long flags;
385 u32 status;
386 u32 rxmask;
387
388 spin_lock_irqsave(&sc->intr_lock, flags);
389 status = sc->intrstatus;
390 sc->intrstatus = 0;
391 spin_unlock_irqrestore(&sc->intr_lock, flags);
392
393 ath9k_ps_wakeup(sc);
394 spin_lock(&sc->sc_pcu_lock);
395
396 if (status & ATH9K_INT_FATAL) {
397 type = RESET_TYPE_FATAL_INT;
398 ath9k_queue_reset(sc, type);
399 ath_dbg(common, RESET, "FATAL: Skipping interrupts\n");
400 goto out;
401 }
402
403 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
404 (status & ATH9K_INT_BB_WATCHDOG)) {
405 spin_lock_irqsave(&common->cc_lock, flags);
406 ath_hw_cycle_counters_update(common);
407 ar9003_hw_bb_watchdog_dbg_info(ah);
408 spin_unlock_irqrestore(&common->cc_lock, flags);
409
410 if (ar9003_hw_bb_watchdog_check(ah)) {
411 type = RESET_TYPE_BB_WATCHDOG;
412 ath9k_queue_reset(sc, type);
413
414 ath_dbg(common, RESET,
415 "BB_WATCHDOG: Skipping interrupts\n");
416 goto out;
417 }
418 }
419
420 if (status & ATH9K_INT_GTT) {
421 sc->gtt_cnt++;
422
423 if ((sc->gtt_cnt >= MAX_GTT_CNT) && !ath9k_hw_check_alive(ah)) {
424 type = RESET_TYPE_TX_GTT;
425 ath9k_queue_reset(sc, type);
426 ath_dbg(common, RESET,
427 "GTT: Skipping interrupts\n");
428 goto out;
429 }
430 }
431
432 spin_lock_irqsave(&sc->sc_pm_lock, flags);
433 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
434 /*
435 * TSF sync does not look correct; remain awake to sync with
436 * the next Beacon.
437 */
438 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
439 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
440 }
441 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
442
443 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
444 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
445 ATH9K_INT_RXORN);
446 else
447 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
448
449 if (status & rxmask) {
450 /* Check for high priority Rx first */
451 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
452 (status & ATH9K_INT_RXHP))
453 ath_rx_tasklet(sc, 0, true);
454
455 ath_rx_tasklet(sc, 0, false);
456 }
457
458 if (status & ATH9K_INT_TX) {
459 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
460 /*
461 * For EDMA chips, TX completion is enabled for the
462 * beacon queue, so if a beacon has been transmitted
463 * successfully after a GTT interrupt, the GTT counter
464 * gets reset to zero here.
465 */
466 sc->gtt_cnt = 0;
467
468 ath_tx_edma_tasklet(sc);
469 } else {
470 ath_tx_tasklet(sc);
471 }
472
473 wake_up(&sc->tx_wait);
474 }
475
476 if (status & ATH9K_INT_GENTIMER)
477 ath_gen_timer_isr(sc->sc_ah);
478
479 ath9k_btcoex_handle_interrupt(sc, status);
480
481 /* re-enable hardware interrupt */
482 ath9k_hw_resume_interrupts(ah);
483 out:
484 spin_unlock(&sc->sc_pcu_lock);
485 ath9k_ps_restore(sc);
486 }
487
ath_isr(int irq,void * dev)488 irqreturn_t ath_isr(int irq, void *dev)
489 {
490 #define SCHED_INTR ( \
491 ATH9K_INT_FATAL | \
492 ATH9K_INT_BB_WATCHDOG | \
493 ATH9K_INT_RXORN | \
494 ATH9K_INT_RXEOL | \
495 ATH9K_INT_RX | \
496 ATH9K_INT_RXLP | \
497 ATH9K_INT_RXHP | \
498 ATH9K_INT_TX | \
499 ATH9K_INT_BMISS | \
500 ATH9K_INT_CST | \
501 ATH9K_INT_GTT | \
502 ATH9K_INT_TSFOOR | \
503 ATH9K_INT_GENTIMER | \
504 ATH9K_INT_MCI)
505
506 struct ath_softc *sc = dev;
507 struct ath_hw *ah = sc->sc_ah;
508 struct ath_common *common = ath9k_hw_common(ah);
509 enum ath9k_int status;
510 u32 sync_cause = 0;
511 bool sched = false;
512
513 /*
514 * The hardware is not ready/present, don't
515 * touch anything. Note this can happen early
516 * on if the IRQ is shared.
517 */
518 if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags))
519 return IRQ_NONE;
520
521 /* shared irq, not for us */
522 if (!ath9k_hw_intrpend(ah))
523 return IRQ_NONE;
524
525 /*
526 * Figure out the reason(s) for the interrupt. Note
527 * that the hal returns a pseudo-ISR that may include
528 * bits we haven't explicitly enabled so we mask the
529 * value to insure we only process bits we requested.
530 */
531 ath9k_hw_getisr(ah, &status, &sync_cause); /* NB: clears ISR too */
532 ath9k_debug_sync_cause(sc, sync_cause);
533 status &= ah->imask; /* discard unasked-for bits */
534
535 if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) {
536 ath9k_hw_kill_interrupts(sc->sc_ah);
537 return IRQ_HANDLED;
538 }
539
540 /*
541 * If there are no status bits set, then this interrupt was not
542 * for me (should have been caught above).
543 */
544 if (!status)
545 return IRQ_NONE;
546
547 /* Cache the status */
548 spin_lock(&sc->intr_lock);
549 sc->intrstatus |= status;
550 spin_unlock(&sc->intr_lock);
551
552 if (status & SCHED_INTR)
553 sched = true;
554
555 /*
556 * If a FATAL interrupt is received, we have to reset the chip
557 * immediately.
558 */
559 if (status & ATH9K_INT_FATAL)
560 goto chip_reset;
561
562 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
563 (status & ATH9K_INT_BB_WATCHDOG))
564 goto chip_reset;
565
566 if (status & ATH9K_INT_SWBA)
567 tasklet_schedule(&sc->bcon_tasklet);
568
569 if (status & ATH9K_INT_TXURN)
570 ath9k_hw_updatetxtriglevel(ah, true);
571
572 if (status & ATH9K_INT_RXEOL) {
573 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
574 ath9k_hw_set_interrupts(ah);
575 }
576
577 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
578 if (status & ATH9K_INT_TIM_TIMER) {
579 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
580 goto chip_reset;
581 /* Clear RxAbort bit so that we can
582 * receive frames */
583 ath9k_setpower(sc, ATH9K_PM_AWAKE);
584 spin_lock(&sc->sc_pm_lock);
585 ath9k_hw_setrxabort(sc->sc_ah, 0);
586 sc->ps_flags |= PS_WAIT_FOR_BEACON;
587 spin_unlock(&sc->sc_pm_lock);
588 }
589
590 chip_reset:
591
592 ath_debug_stat_interrupt(sc, status);
593
594 if (sched) {
595 /* turn off every interrupt */
596 ath9k_hw_kill_interrupts(ah);
597 tasklet_schedule(&sc->intr_tq);
598 }
599
600 return IRQ_HANDLED;
601
602 #undef SCHED_INTR
603 }
604
605 /*
606 * This function is called when a HW reset cannot be deferred
607 * and has to be immediate.
608 */
ath_reset(struct ath_softc * sc,struct ath9k_channel * hchan)609 int ath_reset(struct ath_softc *sc, struct ath9k_channel *hchan)
610 {
611 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
612 int r;
613
614 ath9k_hw_kill_interrupts(sc->sc_ah);
615 set_bit(ATH_OP_HW_RESET, &common->op_flags);
616
617 ath9k_ps_wakeup(sc);
618 r = ath_reset_internal(sc, hchan);
619 ath9k_ps_restore(sc);
620
621 return r;
622 }
623
624 /*
625 * When a HW reset can be deferred, it is added to the
626 * hw_reset_work workqueue, but we set ATH_OP_HW_RESET before
627 * queueing.
628 */
ath9k_queue_reset(struct ath_softc * sc,enum ath_reset_type type)629 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
630 {
631 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
632 #ifdef CONFIG_ATH9K_DEBUGFS
633 RESET_STAT_INC(sc, type);
634 #endif
635 ath9k_hw_kill_interrupts(sc->sc_ah);
636 set_bit(ATH_OP_HW_RESET, &common->op_flags);
637 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
638 }
639
ath_reset_work(struct work_struct * work)640 void ath_reset_work(struct work_struct *work)
641 {
642 struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
643
644 ath9k_ps_wakeup(sc);
645 ath_reset_internal(sc, NULL);
646 ath9k_ps_restore(sc);
647 }
648
649 /**********************/
650 /* mac80211 callbacks */
651 /**********************/
652
ath9k_start(struct ieee80211_hw * hw)653 static int ath9k_start(struct ieee80211_hw *hw)
654 {
655 struct ath_softc *sc = hw->priv;
656 struct ath_hw *ah = sc->sc_ah;
657 struct ath_common *common = ath9k_hw_common(ah);
658 struct ieee80211_channel *curchan = sc->cur_chan->chandef.chan;
659 struct ath_chanctx *ctx = sc->cur_chan;
660 struct ath9k_channel *init_channel;
661 int r;
662
663 ath_dbg(common, CONFIG,
664 "Starting driver with initial channel: %d MHz\n",
665 curchan->center_freq);
666
667 ath9k_ps_wakeup(sc);
668 mutex_lock(&sc->mutex);
669
670 init_channel = ath9k_cmn_get_channel(hw, ah, &ctx->chandef);
671 sc->cur_chandef = hw->conf.chandef;
672
673 /* Reset SERDES registers */
674 ath9k_hw_configpcipowersave(ah, false);
675
676 /*
677 * The basic interface to setting the hardware in a good
678 * state is ``reset''. On return the hardware is known to
679 * be powered up and with interrupts disabled. This must
680 * be followed by initialization of the appropriate bits
681 * and then setup of the interrupt mask.
682 */
683 spin_lock_bh(&sc->sc_pcu_lock);
684
685 atomic_set(&ah->intr_ref_cnt, -1);
686
687 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
688 if (r) {
689 ath_err(common,
690 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
691 r, curchan->center_freq);
692 ah->reset_power_on = false;
693 }
694
695 /* Setup our intr mask. */
696 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
697 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
698 ATH9K_INT_GLOBAL;
699
700 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
701 ah->imask |= ATH9K_INT_RXHP |
702 ATH9K_INT_RXLP;
703 else
704 ah->imask |= ATH9K_INT_RX;
705
706 if (ah->config.hw_hang_checks & HW_BB_WATCHDOG)
707 ah->imask |= ATH9K_INT_BB_WATCHDOG;
708
709 /*
710 * Enable GTT interrupts only for AR9003/AR9004 chips
711 * for now.
712 */
713 if (AR_SREV_9300_20_OR_LATER(ah))
714 ah->imask |= ATH9K_INT_GTT;
715
716 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
717 ah->imask |= ATH9K_INT_CST;
718
719 ath_mci_enable(sc);
720
721 clear_bit(ATH_OP_INVALID, &common->op_flags);
722 sc->sc_ah->is_monitoring = false;
723
724 if (!ath_complete_reset(sc, false))
725 ah->reset_power_on = false;
726
727 if (ah->led_pin >= 0) {
728 ath9k_hw_set_gpio(ah, ah->led_pin,
729 (ah->config.led_active_high) ? 1 : 0);
730 ath9k_hw_gpio_request_out(ah, ah->led_pin, NULL,
731 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
732 }
733
734 /*
735 * Reset key cache to sane defaults (all entries cleared) instead of
736 * semi-random values after suspend/resume.
737 */
738 ath9k_cmn_init_crypto(sc->sc_ah);
739
740 ath9k_hw_reset_tsf(ah);
741
742 spin_unlock_bh(&sc->sc_pcu_lock);
743
744 ath9k_rng_start(sc);
745
746 mutex_unlock(&sc->mutex);
747
748 ath9k_ps_restore(sc);
749
750 return 0;
751 }
752
ath9k_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)753 static void ath9k_tx(struct ieee80211_hw *hw,
754 struct ieee80211_tx_control *control,
755 struct sk_buff *skb)
756 {
757 struct ath_softc *sc = hw->priv;
758 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
759 struct ath_tx_control txctl;
760 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
761 unsigned long flags;
762
763 if (sc->ps_enabled) {
764 /*
765 * mac80211 does not set PM field for normal data frames, so we
766 * need to update that based on the current PS mode.
767 */
768 if (ieee80211_is_data(hdr->frame_control) &&
769 !ieee80211_is_nullfunc(hdr->frame_control) &&
770 !ieee80211_has_pm(hdr->frame_control)) {
771 ath_dbg(common, PS,
772 "Add PM=1 for a TX frame while in PS mode\n");
773 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
774 }
775 }
776
777 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
778 /*
779 * We are using PS-Poll and mac80211 can request TX while in
780 * power save mode. Need to wake up hardware for the TX to be
781 * completed and if needed, also for RX of buffered frames.
782 */
783 ath9k_ps_wakeup(sc);
784 spin_lock_irqsave(&sc->sc_pm_lock, flags);
785 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
786 ath9k_hw_setrxabort(sc->sc_ah, 0);
787 if (ieee80211_is_pspoll(hdr->frame_control)) {
788 ath_dbg(common, PS,
789 "Sending PS-Poll to pick a buffered frame\n");
790 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
791 } else {
792 ath_dbg(common, PS, "Wake up to complete TX\n");
793 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
794 }
795 /*
796 * The actual restore operation will happen only after
797 * the ps_flags bit is cleared. We are just dropping
798 * the ps_usecount here.
799 */
800 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
801 ath9k_ps_restore(sc);
802 }
803
804 /*
805 * Cannot tx while the hardware is in full sleep, it first needs a full
806 * chip reset to recover from that
807 */
808 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
809 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
810 goto exit;
811 }
812
813 memset(&txctl, 0, sizeof(struct ath_tx_control));
814 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
815 txctl.sta = control->sta;
816
817 ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
818
819 if (ath_tx_start(hw, skb, &txctl) != 0) {
820 ath_dbg(common, XMIT, "TX failed\n");
821 TX_STAT_INC(sc, txctl.txq->axq_qnum, txfailed);
822 goto exit;
823 }
824
825 return;
826 exit:
827 ieee80211_free_txskb(hw, skb);
828 }
829
ath9k_txq_list_has_key(struct list_head * txq_list,u32 keyix)830 static bool ath9k_txq_list_has_key(struct list_head *txq_list, u32 keyix)
831 {
832 struct ath_buf *bf;
833 struct ieee80211_tx_info *txinfo;
834 struct ath_frame_info *fi;
835
836 list_for_each_entry(bf, txq_list, list) {
837 if (bf->bf_state.stale || !bf->bf_mpdu)
838 continue;
839
840 txinfo = IEEE80211_SKB_CB(bf->bf_mpdu);
841 fi = (struct ath_frame_info *)&txinfo->status.status_driver_data[0];
842 if (fi->keyix == keyix)
843 return true;
844 }
845
846 return false;
847 }
848
ath9k_txq_has_key(struct ath_softc * sc,u32 keyix)849 static bool ath9k_txq_has_key(struct ath_softc *sc, u32 keyix)
850 {
851 struct ath_hw *ah = sc->sc_ah;
852 int i, j;
853 struct ath_txq *txq;
854 bool key_in_use = false;
855
856 for (i = 0; !key_in_use && i < ATH9K_NUM_TX_QUEUES; i++) {
857 if (!ATH_TXQ_SETUP(sc, i))
858 continue;
859 txq = &sc->tx.txq[i];
860 if (!txq->axq_depth)
861 continue;
862 if (!ath9k_hw_numtxpending(ah, txq->axq_qnum))
863 continue;
864
865 ath_txq_lock(sc, txq);
866 key_in_use = ath9k_txq_list_has_key(&txq->axq_q, keyix);
867 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
868 int idx = txq->txq_tailidx;
869
870 for (j = 0; !key_in_use &&
871 !list_empty(&txq->txq_fifo[idx]) &&
872 j < ATH_TXFIFO_DEPTH; j++) {
873 key_in_use = ath9k_txq_list_has_key(
874 &txq->txq_fifo[idx], keyix);
875 INCR(idx, ATH_TXFIFO_DEPTH);
876 }
877 }
878 ath_txq_unlock(sc, txq);
879 }
880
881 return key_in_use;
882 }
883
ath9k_pending_key_del(struct ath_softc * sc,u8 keyix)884 static void ath9k_pending_key_del(struct ath_softc *sc, u8 keyix)
885 {
886 struct ath_hw *ah = sc->sc_ah;
887 struct ath_common *common = ath9k_hw_common(ah);
888
889 if (!test_bit(keyix, ah->pending_del_keymap) ||
890 ath9k_txq_has_key(sc, keyix))
891 return;
892
893 /* No more TXQ frames point to this key cache entry, so delete it. */
894 clear_bit(keyix, ah->pending_del_keymap);
895 ath_key_delete(common, keyix);
896 }
897
ath9k_stop(struct ieee80211_hw * hw)898 static void ath9k_stop(struct ieee80211_hw *hw)
899 {
900 struct ath_softc *sc = hw->priv;
901 struct ath_hw *ah = sc->sc_ah;
902 struct ath_common *common = ath9k_hw_common(ah);
903 bool prev_idle;
904 int i;
905
906 ath9k_deinit_channel_context(sc);
907
908 mutex_lock(&sc->mutex);
909
910 ath9k_rng_stop(sc);
911
912 ath_cancel_work(sc);
913
914 if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
915 ath_dbg(common, ANY, "Device not present\n");
916 mutex_unlock(&sc->mutex);
917 return;
918 }
919
920 /* Ensure HW is awake when we try to shut it down. */
921 ath9k_ps_wakeup(sc);
922
923 spin_lock_bh(&sc->sc_pcu_lock);
924
925 /* prevent tasklets to enable interrupts once we disable them */
926 ah->imask &= ~ATH9K_INT_GLOBAL;
927
928 /* make sure h/w will not generate any interrupt
929 * before setting the invalid flag. */
930 ath9k_hw_disable_interrupts(ah);
931
932 spin_unlock_bh(&sc->sc_pcu_lock);
933
934 /* we can now sync irq and kill any running tasklets, since we already
935 * disabled interrupts and not holding a spin lock */
936 synchronize_irq(sc->irq);
937 tasklet_kill(&sc->intr_tq);
938 tasklet_kill(&sc->bcon_tasklet);
939
940 prev_idle = sc->ps_idle;
941 sc->ps_idle = true;
942
943 spin_lock_bh(&sc->sc_pcu_lock);
944
945 if (ah->led_pin >= 0) {
946 ath9k_hw_set_gpio(ah, ah->led_pin,
947 (ah->config.led_active_high) ? 0 : 1);
948 ath9k_hw_gpio_request_in(ah, ah->led_pin, NULL);
949 }
950
951 ath_prepare_reset(sc);
952
953 if (sc->rx.frag) {
954 dev_kfree_skb_any(sc->rx.frag);
955 sc->rx.frag = NULL;
956 }
957
958 if (!ah->curchan)
959 ah->curchan = ath9k_cmn_get_channel(hw, ah,
960 &sc->cur_chan->chandef);
961
962 ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
963
964 set_bit(ATH_OP_INVALID, &common->op_flags);
965
966 ath9k_hw_phy_disable(ah);
967
968 ath9k_hw_configpcipowersave(ah, true);
969
970 spin_unlock_bh(&sc->sc_pcu_lock);
971
972 for (i = 0; i < ATH_KEYMAX; i++)
973 ath9k_pending_key_del(sc, i);
974
975 /* Clear key cache entries explicitly to get rid of any potentially
976 * remaining keys.
977 */
978 ath9k_cmn_init_crypto(sc->sc_ah);
979
980 ath9k_ps_restore(sc);
981
982 sc->ps_idle = prev_idle;
983
984 mutex_unlock(&sc->mutex);
985
986 ath_dbg(common, CONFIG, "Driver halt\n");
987 }
988
ath9k_uses_beacons(int type)989 static bool ath9k_uses_beacons(int type)
990 {
991 switch (type) {
992 case NL80211_IFTYPE_AP:
993 case NL80211_IFTYPE_ADHOC:
994 case NL80211_IFTYPE_MESH_POINT:
995 return true;
996 default:
997 return false;
998 }
999 }
1000
ath9k_vif_iter_set_beacon(struct ath9k_vif_iter_data * iter_data,struct ieee80211_vif * vif)1001 static void ath9k_vif_iter_set_beacon(struct ath9k_vif_iter_data *iter_data,
1002 struct ieee80211_vif *vif)
1003 {
1004 /* Use the first (configured) interface, but prefering AP interfaces. */
1005 if (!iter_data->primary_beacon_vif) {
1006 iter_data->primary_beacon_vif = vif;
1007 } else {
1008 if (iter_data->primary_beacon_vif->type != NL80211_IFTYPE_AP &&
1009 vif->type == NL80211_IFTYPE_AP)
1010 iter_data->primary_beacon_vif = vif;
1011 }
1012
1013 iter_data->beacons = true;
1014 iter_data->nbcnvifs += 1;
1015 }
1016
ath9k_vif_iter(struct ath9k_vif_iter_data * iter_data,u8 * mac,struct ieee80211_vif * vif)1017 static void ath9k_vif_iter(struct ath9k_vif_iter_data *iter_data,
1018 u8 *mac, struct ieee80211_vif *vif)
1019 {
1020 struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
1021 int i;
1022
1023 if (iter_data->has_hw_macaddr) {
1024 for (i = 0; i < ETH_ALEN; i++)
1025 iter_data->mask[i] &=
1026 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1027 } else {
1028 memcpy(iter_data->hw_macaddr, mac, ETH_ALEN);
1029 iter_data->has_hw_macaddr = true;
1030 }
1031
1032 if (!vif->bss_conf.use_short_slot)
1033 iter_data->slottime = 20;
1034
1035 switch (vif->type) {
1036 case NL80211_IFTYPE_AP:
1037 iter_data->naps++;
1038 if (vif->bss_conf.enable_beacon)
1039 ath9k_vif_iter_set_beacon(iter_data, vif);
1040 break;
1041 case NL80211_IFTYPE_STATION:
1042 iter_data->nstations++;
1043 if (avp->assoc && !iter_data->primary_sta)
1044 iter_data->primary_sta = vif;
1045 break;
1046 case NL80211_IFTYPE_OCB:
1047 iter_data->nocbs++;
1048 break;
1049 case NL80211_IFTYPE_ADHOC:
1050 iter_data->nadhocs++;
1051 if (vif->bss_conf.enable_beacon)
1052 ath9k_vif_iter_set_beacon(iter_data, vif);
1053 break;
1054 case NL80211_IFTYPE_MESH_POINT:
1055 iter_data->nmeshes++;
1056 if (vif->bss_conf.enable_beacon)
1057 ath9k_vif_iter_set_beacon(iter_data, vif);
1058 break;
1059 default:
1060 break;
1061 }
1062 }
1063
ath9k_update_bssid_mask(struct ath_softc * sc,struct ath_chanctx * ctx,struct ath9k_vif_iter_data * iter_data)1064 static void ath9k_update_bssid_mask(struct ath_softc *sc,
1065 struct ath_chanctx *ctx,
1066 struct ath9k_vif_iter_data *iter_data)
1067 {
1068 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1069 struct ath_vif *avp;
1070 int i;
1071
1072 if (!ath9k_is_chanctx_enabled())
1073 return;
1074
1075 list_for_each_entry(avp, &ctx->vifs, list) {
1076 if (ctx->nvifs_assigned != 1)
1077 continue;
1078
1079 if (!iter_data->has_hw_macaddr)
1080 continue;
1081
1082 ether_addr_copy(common->curbssid, avp->bssid);
1083
1084 /* perm_addr will be used as the p2p device address. */
1085 for (i = 0; i < ETH_ALEN; i++)
1086 iter_data->mask[i] &=
1087 ~(iter_data->hw_macaddr[i] ^
1088 sc->hw->wiphy->perm_addr[i]);
1089 }
1090 }
1091
1092 /* Called with sc->mutex held. */
ath9k_calculate_iter_data(struct ath_softc * sc,struct ath_chanctx * ctx,struct ath9k_vif_iter_data * iter_data)1093 void ath9k_calculate_iter_data(struct ath_softc *sc,
1094 struct ath_chanctx *ctx,
1095 struct ath9k_vif_iter_data *iter_data)
1096 {
1097 struct ath_vif *avp;
1098
1099 /*
1100 * The hardware will use primary station addr together with the
1101 * BSSID mask when matching addresses.
1102 */
1103 memset(iter_data, 0, sizeof(*iter_data));
1104 eth_broadcast_addr(iter_data->mask);
1105 iter_data->slottime = 9;
1106
1107 list_for_each_entry(avp, &ctx->vifs, list)
1108 ath9k_vif_iter(iter_data, avp->vif->addr, avp->vif);
1109
1110 ath9k_update_bssid_mask(sc, ctx, iter_data);
1111 }
1112
ath9k_set_assoc_state(struct ath_softc * sc,struct ieee80211_vif * vif,bool changed)1113 static void ath9k_set_assoc_state(struct ath_softc *sc,
1114 struct ieee80211_vif *vif, bool changed)
1115 {
1116 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1117 struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
1118 unsigned long flags;
1119
1120 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1121
1122 ether_addr_copy(common->curbssid, avp->bssid);
1123 common->curaid = avp->aid;
1124 ath9k_hw_write_associd(sc->sc_ah);
1125
1126 if (changed) {
1127 common->last_rssi = ATH_RSSI_DUMMY_MARKER;
1128 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1129
1130 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1131 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1132 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1133 }
1134
1135 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1136 ath9k_mci_update_wlan_channels(sc, false);
1137
1138 ath_dbg(common, CONFIG,
1139 "Primary Station interface: %pM, BSSID: %pM\n",
1140 vif->addr, common->curbssid);
1141 }
1142
1143 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
ath9k_set_offchannel_state(struct ath_softc * sc)1144 static void ath9k_set_offchannel_state(struct ath_softc *sc)
1145 {
1146 struct ath_hw *ah = sc->sc_ah;
1147 struct ath_common *common = ath9k_hw_common(ah);
1148 struct ieee80211_vif *vif = NULL;
1149
1150 ath9k_ps_wakeup(sc);
1151
1152 if (sc->offchannel.state < ATH_OFFCHANNEL_ROC_START)
1153 vif = sc->offchannel.scan_vif;
1154 else
1155 vif = sc->offchannel.roc_vif;
1156
1157 if (WARN_ON(!vif))
1158 goto exit;
1159
1160 eth_zero_addr(common->curbssid);
1161 eth_broadcast_addr(common->bssidmask);
1162 memcpy(common->macaddr, vif->addr, ETH_ALEN);
1163 common->curaid = 0;
1164 ah->opmode = vif->type;
1165 ah->imask &= ~ATH9K_INT_SWBA;
1166 ah->imask &= ~ATH9K_INT_TSFOOR;
1167 ah->slottime = 9;
1168
1169 ath_hw_setbssidmask(common);
1170 ath9k_hw_setopmode(ah);
1171 ath9k_hw_write_associd(sc->sc_ah);
1172 ath9k_hw_set_interrupts(ah);
1173 ath9k_hw_init_global_settings(ah);
1174
1175 exit:
1176 ath9k_ps_restore(sc);
1177 }
1178 #endif
1179
1180 /* Called with sc->mutex held. */
ath9k_calculate_summary_state(struct ath_softc * sc,struct ath_chanctx * ctx)1181 void ath9k_calculate_summary_state(struct ath_softc *sc,
1182 struct ath_chanctx *ctx)
1183 {
1184 struct ath_hw *ah = sc->sc_ah;
1185 struct ath_common *common = ath9k_hw_common(ah);
1186 struct ath9k_vif_iter_data iter_data;
1187
1188 ath_chanctx_check_active(sc, ctx);
1189
1190 if (ctx != sc->cur_chan)
1191 return;
1192
1193 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1194 if (ctx == &sc->offchannel.chan)
1195 return ath9k_set_offchannel_state(sc);
1196 #endif
1197
1198 ath9k_ps_wakeup(sc);
1199 ath9k_calculate_iter_data(sc, ctx, &iter_data);
1200
1201 if (iter_data.has_hw_macaddr)
1202 memcpy(common->macaddr, iter_data.hw_macaddr, ETH_ALEN);
1203
1204 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1205 ath_hw_setbssidmask(common);
1206
1207 if (iter_data.naps > 0) {
1208 ath9k_hw_set_tsfadjust(ah, true);
1209 ah->opmode = NL80211_IFTYPE_AP;
1210 } else {
1211 ath9k_hw_set_tsfadjust(ah, false);
1212 if (iter_data.beacons)
1213 ath9k_beacon_ensure_primary_slot(sc);
1214
1215 if (iter_data.nmeshes)
1216 ah->opmode = NL80211_IFTYPE_MESH_POINT;
1217 else if (iter_data.nocbs)
1218 ah->opmode = NL80211_IFTYPE_OCB;
1219 else if (iter_data.nadhocs)
1220 ah->opmode = NL80211_IFTYPE_ADHOC;
1221 else
1222 ah->opmode = NL80211_IFTYPE_STATION;
1223 }
1224
1225 ath9k_hw_setopmode(ah);
1226
1227 ctx->switch_after_beacon = false;
1228 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
1229 ah->imask |= ATH9K_INT_TSFOOR;
1230 else {
1231 ah->imask &= ~ATH9K_INT_TSFOOR;
1232 if (iter_data.naps == 1 && iter_data.beacons)
1233 ctx->switch_after_beacon = true;
1234 }
1235
1236 if (ah->opmode == NL80211_IFTYPE_STATION) {
1237 bool changed = (iter_data.primary_sta != ctx->primary_sta);
1238
1239 if (iter_data.primary_sta) {
1240 iter_data.primary_beacon_vif = iter_data.primary_sta;
1241 iter_data.beacons = true;
1242 ath9k_set_assoc_state(sc, iter_data.primary_sta,
1243 changed);
1244 ctx->primary_sta = iter_data.primary_sta;
1245 } else {
1246 ctx->primary_sta = NULL;
1247 eth_zero_addr(common->curbssid);
1248 common->curaid = 0;
1249 ath9k_hw_write_associd(sc->sc_ah);
1250 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1251 ath9k_mci_update_wlan_channels(sc, true);
1252 }
1253 }
1254 sc->nbcnvifs = iter_data.nbcnvifs;
1255 ath9k_beacon_config(sc, iter_data.primary_beacon_vif,
1256 iter_data.beacons);
1257 ath9k_hw_set_interrupts(ah);
1258
1259 if (ah->slottime != iter_data.slottime) {
1260 ah->slottime = iter_data.slottime;
1261 ath9k_hw_init_global_settings(ah);
1262 }
1263
1264 if (iter_data.primary_sta)
1265 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1266 else
1267 clear_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1268
1269 ath_dbg(common, CONFIG,
1270 "macaddr: %pM, bssid: %pM, bssidmask: %pM\n",
1271 common->macaddr, common->curbssid, common->bssidmask);
1272
1273 ath9k_ps_restore(sc);
1274 }
1275
ath9k_tpc_vif_iter(void * data,u8 * mac,struct ieee80211_vif * vif)1276 static void ath9k_tpc_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1277 {
1278 int *power = data;
1279
1280 if (vif->bss_conf.txpower == INT_MIN)
1281 return;
1282
1283 if (*power < vif->bss_conf.txpower)
1284 *power = vif->bss_conf.txpower;
1285 }
1286
1287 /* Called with sc->mutex held. */
ath9k_set_txpower(struct ath_softc * sc,struct ieee80211_vif * vif)1288 void ath9k_set_txpower(struct ath_softc *sc, struct ieee80211_vif *vif)
1289 {
1290 int power;
1291 struct ath_hw *ah = sc->sc_ah;
1292 struct ath_regulatory *reg = ath9k_hw_regulatory(ah);
1293
1294 ath9k_ps_wakeup(sc);
1295 if (ah->tpc_enabled) {
1296 power = (vif) ? vif->bss_conf.txpower : -1;
1297 ieee80211_iterate_active_interfaces_atomic(
1298 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1299 ath9k_tpc_vif_iter, &power);
1300 if (power == -1)
1301 power = sc->hw->conf.power_level;
1302 } else {
1303 power = sc->hw->conf.power_level;
1304 }
1305 sc->cur_chan->txpower = 2 * power;
1306 ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
1307 sc->cur_chan->cur_txpower = reg->max_power_level;
1308 ath9k_ps_restore(sc);
1309 }
1310
ath9k_assign_hw_queues(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1311 static void ath9k_assign_hw_queues(struct ieee80211_hw *hw,
1312 struct ieee80211_vif *vif)
1313 {
1314 int i;
1315
1316 if (!ath9k_is_chanctx_enabled())
1317 return;
1318
1319 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1320 vif->hw_queue[i] = i;
1321
1322 if (vif->type == NL80211_IFTYPE_AP ||
1323 vif->type == NL80211_IFTYPE_MESH_POINT)
1324 vif->cab_queue = hw->queues - 2;
1325 else
1326 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1327 }
1328
ath9k_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1329 static int ath9k_add_interface(struct ieee80211_hw *hw,
1330 struct ieee80211_vif *vif)
1331 {
1332 struct ath_softc *sc = hw->priv;
1333 struct ath_hw *ah = sc->sc_ah;
1334 struct ath_common *common = ath9k_hw_common(ah);
1335 struct ath_vif *avp = (void *)vif->drv_priv;
1336 struct ath_node *an = &avp->mcast_node;
1337
1338 mutex_lock(&sc->mutex);
1339 if (IS_ENABLED(CONFIG_ATH9K_TX99)) {
1340 if (sc->cur_chan->nvifs >= 1) {
1341 mutex_unlock(&sc->mutex);
1342 return -EOPNOTSUPP;
1343 }
1344 sc->tx99_vif = vif;
1345 }
1346
1347 ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1348 sc->cur_chan->nvifs++;
1349
1350 if (vif->type == NL80211_IFTYPE_STATION && ath9k_is_chanctx_enabled())
1351 vif->driver_flags |= IEEE80211_VIF_GET_NOA_UPDATE;
1352
1353 if (ath9k_uses_beacons(vif->type))
1354 ath9k_beacon_assign_slot(sc, vif);
1355
1356 avp->vif = vif;
1357 if (!ath9k_is_chanctx_enabled()) {
1358 avp->chanctx = sc->cur_chan;
1359 list_add_tail(&avp->list, &avp->chanctx->vifs);
1360 }
1361
1362 ath9k_calculate_summary_state(sc, avp->chanctx);
1363
1364 ath9k_assign_hw_queues(hw, vif);
1365
1366 ath9k_set_txpower(sc, vif);
1367
1368 an->sc = sc;
1369 an->sta = NULL;
1370 an->vif = vif;
1371 an->no_ps_filter = true;
1372 ath_tx_node_init(sc, an);
1373
1374 mutex_unlock(&sc->mutex);
1375 return 0;
1376 }
1377
ath9k_change_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_iftype new_type,bool p2p)1378 static int ath9k_change_interface(struct ieee80211_hw *hw,
1379 struct ieee80211_vif *vif,
1380 enum nl80211_iftype new_type,
1381 bool p2p)
1382 {
1383 struct ath_softc *sc = hw->priv;
1384 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1385 struct ath_vif *avp = (void *)vif->drv_priv;
1386
1387 mutex_lock(&sc->mutex);
1388
1389 if (IS_ENABLED(CONFIG_ATH9K_TX99)) {
1390 mutex_unlock(&sc->mutex);
1391 return -EOPNOTSUPP;
1392 }
1393
1394 ath_dbg(common, CONFIG, "Change Interface\n");
1395
1396 if (ath9k_uses_beacons(vif->type))
1397 ath9k_beacon_remove_slot(sc, vif);
1398
1399 vif->type = new_type;
1400 vif->p2p = p2p;
1401
1402 if (ath9k_uses_beacons(vif->type))
1403 ath9k_beacon_assign_slot(sc, vif);
1404
1405 ath9k_assign_hw_queues(hw, vif);
1406 ath9k_calculate_summary_state(sc, avp->chanctx);
1407
1408 ath9k_set_txpower(sc, vif);
1409
1410 mutex_unlock(&sc->mutex);
1411 return 0;
1412 }
1413
ath9k_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1414 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1415 struct ieee80211_vif *vif)
1416 {
1417 struct ath_softc *sc = hw->priv;
1418 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1419 struct ath_vif *avp = (void *)vif->drv_priv;
1420
1421 ath_dbg(common, CONFIG, "Detach Interface\n");
1422
1423 mutex_lock(&sc->mutex);
1424
1425 ath9k_p2p_remove_vif(sc, vif);
1426
1427 sc->cur_chan->nvifs--;
1428 sc->tx99_vif = NULL;
1429 if (!ath9k_is_chanctx_enabled())
1430 list_del(&avp->list);
1431
1432 if (ath9k_uses_beacons(vif->type))
1433 ath9k_beacon_remove_slot(sc, vif);
1434
1435 ath_tx_node_cleanup(sc, &avp->mcast_node);
1436
1437 ath9k_calculate_summary_state(sc, avp->chanctx);
1438
1439 ath9k_set_txpower(sc, NULL);
1440
1441 mutex_unlock(&sc->mutex);
1442 }
1443
ath9k_enable_ps(struct ath_softc * sc)1444 static void ath9k_enable_ps(struct ath_softc *sc)
1445 {
1446 struct ath_hw *ah = sc->sc_ah;
1447 struct ath_common *common = ath9k_hw_common(ah);
1448
1449 if (IS_ENABLED(CONFIG_ATH9K_TX99))
1450 return;
1451
1452 sc->ps_enabled = true;
1453 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1454 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1455 ah->imask |= ATH9K_INT_TIM_TIMER;
1456 ath9k_hw_set_interrupts(ah);
1457 }
1458 ath9k_hw_setrxabort(ah, 1);
1459 }
1460 ath_dbg(common, PS, "PowerSave enabled\n");
1461 }
1462
ath9k_disable_ps(struct ath_softc * sc)1463 static void ath9k_disable_ps(struct ath_softc *sc)
1464 {
1465 struct ath_hw *ah = sc->sc_ah;
1466 struct ath_common *common = ath9k_hw_common(ah);
1467
1468 if (IS_ENABLED(CONFIG_ATH9K_TX99))
1469 return;
1470
1471 sc->ps_enabled = false;
1472 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1473 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1474 ath9k_hw_setrxabort(ah, 0);
1475 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1476 PS_WAIT_FOR_CAB |
1477 PS_WAIT_FOR_PSPOLL_DATA |
1478 PS_WAIT_FOR_TX_ACK);
1479 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1480 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1481 ath9k_hw_set_interrupts(ah);
1482 }
1483 }
1484 ath_dbg(common, PS, "PowerSave disabled\n");
1485 }
1486
ath9k_config(struct ieee80211_hw * hw,u32 changed)1487 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1488 {
1489 struct ath_softc *sc = hw->priv;
1490 struct ath_hw *ah = sc->sc_ah;
1491 struct ath_common *common = ath9k_hw_common(ah);
1492 struct ieee80211_conf *conf = &hw->conf;
1493 struct ath_chanctx *ctx = sc->cur_chan;
1494
1495 ath9k_ps_wakeup(sc);
1496 mutex_lock(&sc->mutex);
1497
1498 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1499 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1500 if (sc->ps_idle) {
1501 ath_cancel_work(sc);
1502 ath9k_stop_btcoex(sc);
1503 } else {
1504 ath9k_start_btcoex(sc);
1505 /*
1506 * The chip needs a reset to properly wake up from
1507 * full sleep
1508 */
1509 ath_chanctx_set_channel(sc, ctx, &ctx->chandef);
1510 }
1511 }
1512
1513 /*
1514 * We just prepare to enable PS. We have to wait until our AP has
1515 * ACK'd our null data frame to disable RX otherwise we'll ignore
1516 * those ACKs and end up retransmitting the same null data frames.
1517 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1518 */
1519 if (changed & IEEE80211_CONF_CHANGE_PS) {
1520 unsigned long flags;
1521 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1522 if (conf->flags & IEEE80211_CONF_PS)
1523 ath9k_enable_ps(sc);
1524 else
1525 ath9k_disable_ps(sc);
1526 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1527 }
1528
1529 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1530 if (conf->flags & IEEE80211_CONF_MONITOR) {
1531 ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1532 sc->sc_ah->is_monitoring = true;
1533 } else {
1534 ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1535 sc->sc_ah->is_monitoring = false;
1536 }
1537 }
1538
1539 if (!ath9k_is_chanctx_enabled() && (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
1540 ctx->offchannel = !!(conf->flags & IEEE80211_CONF_OFFCHANNEL);
1541 ath_chanctx_set_channel(sc, ctx, &hw->conf.chandef);
1542 }
1543
1544 if (changed & IEEE80211_CONF_CHANGE_POWER)
1545 ath9k_set_txpower(sc, NULL);
1546
1547 mutex_unlock(&sc->mutex);
1548 ath9k_ps_restore(sc);
1549
1550 return 0;
1551 }
1552
1553 #define SUPPORTED_FILTERS \
1554 (FIF_ALLMULTI | \
1555 FIF_CONTROL | \
1556 FIF_PSPOLL | \
1557 FIF_OTHER_BSS | \
1558 FIF_BCN_PRBRESP_PROMISC | \
1559 FIF_PROBE_REQ | \
1560 FIF_MCAST_ACTION | \
1561 FIF_FCSFAIL)
1562
1563 /* FIXME: sc->sc_full_reset ? */
ath9k_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)1564 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1565 unsigned int changed_flags,
1566 unsigned int *total_flags,
1567 u64 multicast)
1568 {
1569 struct ath_softc *sc = hw->priv;
1570 struct ath_chanctx *ctx;
1571 u32 rfilt;
1572
1573 *total_flags &= SUPPORTED_FILTERS;
1574
1575 spin_lock_bh(&sc->chan_lock);
1576 ath_for_each_chanctx(sc, ctx)
1577 ctx->rxfilter = *total_flags;
1578 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1579 sc->offchannel.chan.rxfilter = *total_flags;
1580 #endif
1581 spin_unlock_bh(&sc->chan_lock);
1582
1583 ath9k_ps_wakeup(sc);
1584 rfilt = ath_calcrxfilter(sc);
1585 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1586 ath9k_ps_restore(sc);
1587
1588 ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1589 rfilt);
1590 }
1591
ath9k_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1592 static int ath9k_sta_add(struct ieee80211_hw *hw,
1593 struct ieee80211_vif *vif,
1594 struct ieee80211_sta *sta)
1595 {
1596 struct ath_softc *sc = hw->priv;
1597 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1598 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1599 struct ieee80211_key_conf ps_key = { };
1600 int key;
1601
1602 ath_node_attach(sc, sta, vif);
1603
1604 if (vif->type != NL80211_IFTYPE_AP &&
1605 vif->type != NL80211_IFTYPE_AP_VLAN)
1606 return 0;
1607
1608 key = ath_key_config(common, vif, sta, &ps_key);
1609 if (key > 0) {
1610 an->ps_key = key;
1611 an->key_idx[0] = key;
1612 }
1613
1614 return 0;
1615 }
1616
ath9k_del_ps_key(struct ath_softc * sc,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1617 static void ath9k_del_ps_key(struct ath_softc *sc,
1618 struct ieee80211_vif *vif,
1619 struct ieee80211_sta *sta)
1620 {
1621 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1622 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1623
1624 if (!an->ps_key)
1625 return;
1626
1627 ath_key_delete(common, an->ps_key);
1628 an->ps_key = 0;
1629 an->key_idx[0] = 0;
1630 }
1631
ath9k_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1632 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1633 struct ieee80211_vif *vif,
1634 struct ieee80211_sta *sta)
1635 {
1636 struct ath_softc *sc = hw->priv;
1637
1638 ath9k_del_ps_key(sc, vif, sta);
1639 ath_node_detach(sc, sta);
1640
1641 return 0;
1642 }
1643
ath9k_sta_state(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,enum ieee80211_sta_state old_state,enum ieee80211_sta_state new_state)1644 static int ath9k_sta_state(struct ieee80211_hw *hw,
1645 struct ieee80211_vif *vif,
1646 struct ieee80211_sta *sta,
1647 enum ieee80211_sta_state old_state,
1648 enum ieee80211_sta_state new_state)
1649 {
1650 struct ath_softc *sc = hw->priv;
1651 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1652 int ret = 0;
1653
1654 if (old_state == IEEE80211_STA_NOTEXIST &&
1655 new_state == IEEE80211_STA_NONE) {
1656 ret = ath9k_sta_add(hw, vif, sta);
1657 ath_dbg(common, CONFIG,
1658 "Add station: %pM\n", sta->addr);
1659 } else if (old_state == IEEE80211_STA_NONE &&
1660 new_state == IEEE80211_STA_NOTEXIST) {
1661 ret = ath9k_sta_remove(hw, vif, sta);
1662 ath_dbg(common, CONFIG,
1663 "Remove station: %pM\n", sta->addr);
1664 }
1665
1666 if (ath9k_is_chanctx_enabled()) {
1667 if (vif->type == NL80211_IFTYPE_STATION) {
1668 if (old_state == IEEE80211_STA_ASSOC &&
1669 new_state == IEEE80211_STA_AUTHORIZED)
1670 ath_chanctx_event(sc, vif,
1671 ATH_CHANCTX_EVENT_AUTHORIZED);
1672 }
1673 }
1674
1675 return ret;
1676 }
1677
ath9k_sta_set_tx_filter(struct ath_hw * ah,struct ath_node * an,bool set)1678 static void ath9k_sta_set_tx_filter(struct ath_hw *ah,
1679 struct ath_node *an,
1680 bool set)
1681 {
1682 int i;
1683
1684 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1685 if (!an->key_idx[i])
1686 continue;
1687 ath9k_hw_set_tx_filter(ah, an->key_idx[i], set);
1688 }
1689 }
1690
ath9k_sta_notify(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum sta_notify_cmd cmd,struct ieee80211_sta * sta)1691 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1692 struct ieee80211_vif *vif,
1693 enum sta_notify_cmd cmd,
1694 struct ieee80211_sta *sta)
1695 {
1696 struct ath_softc *sc = hw->priv;
1697 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1698
1699 switch (cmd) {
1700 case STA_NOTIFY_SLEEP:
1701 an->sleeping = true;
1702 ath_tx_aggr_sleep(sta, sc, an);
1703 ath9k_sta_set_tx_filter(sc->sc_ah, an, true);
1704 break;
1705 case STA_NOTIFY_AWAKE:
1706 ath9k_sta_set_tx_filter(sc->sc_ah, an, false);
1707 an->sleeping = false;
1708 ath_tx_aggr_wakeup(sc, an);
1709 break;
1710 }
1711 }
1712
ath9k_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)1713 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1714 struct ieee80211_vif *vif,
1715 unsigned int link_id, u16 queue,
1716 const struct ieee80211_tx_queue_params *params)
1717 {
1718 struct ath_softc *sc = hw->priv;
1719 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1720 struct ath_txq *txq;
1721 struct ath9k_tx_queue_info qi;
1722 int ret = 0;
1723
1724 if (queue >= IEEE80211_NUM_ACS)
1725 return 0;
1726
1727 txq = sc->tx.txq_map[queue];
1728
1729 ath9k_ps_wakeup(sc);
1730 mutex_lock(&sc->mutex);
1731
1732 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1733
1734 qi.tqi_aifs = params->aifs;
1735 qi.tqi_cwmin = params->cw_min;
1736 qi.tqi_cwmax = params->cw_max;
1737 qi.tqi_burstTime = params->txop * 32;
1738
1739 ath_dbg(common, CONFIG,
1740 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1741 queue, txq->axq_qnum, params->aifs, params->cw_min,
1742 params->cw_max, params->txop);
1743
1744 ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1745 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1746 if (ret)
1747 ath_err(common, "TXQ Update failed\n");
1748
1749 mutex_unlock(&sc->mutex);
1750 ath9k_ps_restore(sc);
1751
1752 return ret;
1753 }
1754
ath9k_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)1755 static int ath9k_set_key(struct ieee80211_hw *hw,
1756 enum set_key_cmd cmd,
1757 struct ieee80211_vif *vif,
1758 struct ieee80211_sta *sta,
1759 struct ieee80211_key_conf *key)
1760 {
1761 struct ath_softc *sc = hw->priv;
1762 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1763 struct ath_node *an = NULL;
1764 int ret = 0, i;
1765
1766 if (ath9k_modparam_nohwcrypt)
1767 return -ENOSPC;
1768
1769 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1770 vif->type == NL80211_IFTYPE_MESH_POINT) &&
1771 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1772 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1773 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1774 /*
1775 * For now, disable hw crypto for the RSN IBSS group keys. This
1776 * could be optimized in the future to use a modified key cache
1777 * design to support per-STA RX GTK, but until that gets
1778 * implemented, use of software crypto for group addressed
1779 * frames is a acceptable to allow RSN IBSS to be used.
1780 */
1781 return -EOPNOTSUPP;
1782 }
1783
1784 /* There may be MPDUs queued for the outgoing PTK key. Flush queues to
1785 * make sure these are not send unencrypted or with a wrong (new) key
1786 */
1787 if (cmd == DISABLE_KEY && key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
1788 ieee80211_stop_queues(hw);
1789 ath9k_flush(hw, vif, 0, true);
1790 ieee80211_wake_queues(hw);
1791 }
1792
1793 mutex_lock(&sc->mutex);
1794 ath9k_ps_wakeup(sc);
1795 ath_dbg(common, CONFIG, "Set HW Key %d\n", cmd);
1796 if (sta)
1797 an = (struct ath_node *)sta->drv_priv;
1798
1799 /* Delete pending key cache entries if no more frames are pointing to
1800 * them in TXQs.
1801 */
1802 for (i = 0; i < ATH_KEYMAX; i++)
1803 ath9k_pending_key_del(sc, i);
1804
1805 switch (cmd) {
1806 case SET_KEY:
1807 if (sta)
1808 ath9k_del_ps_key(sc, vif, sta);
1809
1810 key->hw_key_idx = 0;
1811 ret = ath_key_config(common, vif, sta, key);
1812 if (ret >= 0) {
1813 key->hw_key_idx = ret;
1814 /* push IV and Michael MIC generation to stack */
1815 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1816 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1817 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1818 if (sc->sc_ah->sw_mgmt_crypto_tx &&
1819 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1820 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1821 ret = 0;
1822 }
1823 if (an && key->hw_key_idx) {
1824 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1825 if (an->key_idx[i])
1826 continue;
1827 an->key_idx[i] = key->hw_key_idx;
1828 break;
1829 }
1830 WARN_ON(i == ARRAY_SIZE(an->key_idx));
1831 }
1832 break;
1833 case DISABLE_KEY:
1834 if (ath9k_txq_has_key(sc, key->hw_key_idx)) {
1835 /* Delay key cache entry deletion until there are no
1836 * remaining TXQ frames pointing to this entry.
1837 */
1838 set_bit(key->hw_key_idx, sc->sc_ah->pending_del_keymap);
1839 ath_hw_keysetmac(common, key->hw_key_idx, NULL);
1840 } else {
1841 ath_key_delete(common, key->hw_key_idx);
1842 }
1843 if (an) {
1844 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1845 if (an->key_idx[i] != key->hw_key_idx)
1846 continue;
1847 an->key_idx[i] = 0;
1848 break;
1849 }
1850 }
1851 key->hw_key_idx = 0;
1852 break;
1853 default:
1854 ret = -EINVAL;
1855 }
1856
1857 ath9k_ps_restore(sc);
1858 mutex_unlock(&sc->mutex);
1859
1860 return ret;
1861 }
1862
ath9k_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u64 changed)1863 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1864 struct ieee80211_vif *vif,
1865 struct ieee80211_bss_conf *bss_conf,
1866 u64 changed)
1867 {
1868 #define CHECK_ANI \
1869 (BSS_CHANGED_ASSOC | \
1870 BSS_CHANGED_IBSS | \
1871 BSS_CHANGED_BEACON_ENABLED)
1872
1873 struct ath_softc *sc = hw->priv;
1874 struct ath_hw *ah = sc->sc_ah;
1875 struct ath_common *common = ath9k_hw_common(ah);
1876 struct ath_vif *avp = (void *)vif->drv_priv;
1877 int slottime;
1878
1879 ath9k_ps_wakeup(sc);
1880 mutex_lock(&sc->mutex);
1881
1882 if (changed & BSS_CHANGED_ASSOC) {
1883 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
1884 bss_conf->bssid, vif->cfg.assoc);
1885
1886 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1887 avp->aid = vif->cfg.aid;
1888 avp->assoc = vif->cfg.assoc;
1889
1890 ath9k_calculate_summary_state(sc, avp->chanctx);
1891 }
1892
1893 if ((changed & BSS_CHANGED_IBSS) ||
1894 (changed & BSS_CHANGED_OCB)) {
1895 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1896 common->curaid = vif->cfg.aid;
1897 ath9k_hw_write_associd(sc->sc_ah);
1898 }
1899
1900 if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
1901 (changed & BSS_CHANGED_BEACON_INT) ||
1902 (changed & BSS_CHANGED_BEACON_INFO)) {
1903 ath9k_calculate_summary_state(sc, avp->chanctx);
1904 }
1905
1906 if ((avp->chanctx == sc->cur_chan) &&
1907 (changed & BSS_CHANGED_ERP_SLOT)) {
1908 if (bss_conf->use_short_slot)
1909 slottime = 9;
1910 else
1911 slottime = 20;
1912
1913 if (vif->type == NL80211_IFTYPE_AP) {
1914 /*
1915 * Defer update, so that connected stations can adjust
1916 * their settings at the same time.
1917 * See beacon.c for more details
1918 */
1919 sc->beacon.slottime = slottime;
1920 sc->beacon.updateslot = UPDATE;
1921 } else {
1922 ah->slottime = slottime;
1923 ath9k_hw_init_global_settings(ah);
1924 }
1925 }
1926
1927 if (changed & BSS_CHANGED_P2P_PS)
1928 ath9k_p2p_bss_info_changed(sc, vif);
1929
1930 if (changed & CHECK_ANI)
1931 ath_check_ani(sc);
1932
1933 if (changed & BSS_CHANGED_TXPOWER) {
1934 ath_dbg(common, CONFIG, "vif %pM power %d dbm power_type %d\n",
1935 vif->addr, bss_conf->txpower, bss_conf->txpower_type);
1936 ath9k_set_txpower(sc, vif);
1937 }
1938
1939 mutex_unlock(&sc->mutex);
1940 ath9k_ps_restore(sc);
1941
1942 #undef CHECK_ANI
1943 }
1944
ath9k_get_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1945 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1946 {
1947 struct ath_softc *sc = hw->priv;
1948 struct ath_vif *avp = (void *)vif->drv_priv;
1949 u64 tsf;
1950
1951 mutex_lock(&sc->mutex);
1952 ath9k_ps_wakeup(sc);
1953 /* Get current TSF either from HW or kernel time. */
1954 if (sc->cur_chan == avp->chanctx) {
1955 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1956 } else {
1957 tsf = sc->cur_chan->tsf_val +
1958 ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, NULL);
1959 }
1960 tsf += le64_to_cpu(avp->tsf_adjust);
1961 ath9k_ps_restore(sc);
1962 mutex_unlock(&sc->mutex);
1963
1964 return tsf;
1965 }
1966
ath9k_set_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u64 tsf)1967 static void ath9k_set_tsf(struct ieee80211_hw *hw,
1968 struct ieee80211_vif *vif,
1969 u64 tsf)
1970 {
1971 struct ath_softc *sc = hw->priv;
1972 struct ath_vif *avp = (void *)vif->drv_priv;
1973
1974 mutex_lock(&sc->mutex);
1975 ath9k_ps_wakeup(sc);
1976 tsf -= le64_to_cpu(avp->tsf_adjust);
1977 ktime_get_raw_ts64(&avp->chanctx->tsf_ts);
1978 if (sc->cur_chan == avp->chanctx)
1979 ath9k_hw_settsf64(sc->sc_ah, tsf);
1980 avp->chanctx->tsf_val = tsf;
1981 ath9k_ps_restore(sc);
1982 mutex_unlock(&sc->mutex);
1983 }
1984
ath9k_reset_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1985 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1986 {
1987 struct ath_softc *sc = hw->priv;
1988 struct ath_vif *avp = (void *)vif->drv_priv;
1989
1990 mutex_lock(&sc->mutex);
1991
1992 ath9k_ps_wakeup(sc);
1993 ktime_get_raw_ts64(&avp->chanctx->tsf_ts);
1994 if (sc->cur_chan == avp->chanctx)
1995 ath9k_hw_reset_tsf(sc->sc_ah);
1996 avp->chanctx->tsf_val = 0;
1997 ath9k_ps_restore(sc);
1998
1999 mutex_unlock(&sc->mutex);
2000 }
2001
ath9k_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)2002 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2003 struct ieee80211_vif *vif,
2004 struct ieee80211_ampdu_params *params)
2005 {
2006 struct ath_softc *sc = hw->priv;
2007 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2008 bool flush = false;
2009 int ret = 0;
2010 struct ieee80211_sta *sta = params->sta;
2011 struct ath_node *an = (struct ath_node *)sta->drv_priv;
2012 enum ieee80211_ampdu_mlme_action action = params->action;
2013 u16 tid = params->tid;
2014 u16 *ssn = ¶ms->ssn;
2015 struct ath_atx_tid *atid;
2016
2017 mutex_lock(&sc->mutex);
2018
2019 switch (action) {
2020 case IEEE80211_AMPDU_RX_START:
2021 break;
2022 case IEEE80211_AMPDU_RX_STOP:
2023 break;
2024 case IEEE80211_AMPDU_TX_START:
2025 if (ath9k_is_chanctx_enabled()) {
2026 if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
2027 ret = -EBUSY;
2028 break;
2029 }
2030 }
2031 ath9k_ps_wakeup(sc);
2032 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2033 if (!ret)
2034 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
2035 ath9k_ps_restore(sc);
2036 break;
2037 case IEEE80211_AMPDU_TX_STOP_FLUSH:
2038 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
2039 flush = true;
2040 fallthrough;
2041 case IEEE80211_AMPDU_TX_STOP_CONT:
2042 ath9k_ps_wakeup(sc);
2043 ath_tx_aggr_stop(sc, sta, tid);
2044 if (!flush)
2045 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2046 ath9k_ps_restore(sc);
2047 break;
2048 case IEEE80211_AMPDU_TX_OPERATIONAL:
2049 atid = ath_node_to_tid(an, tid);
2050 atid->baw_size = IEEE80211_MIN_AMPDU_BUF <<
2051 sta->deflink.ht_cap.ampdu_factor;
2052 break;
2053 default:
2054 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2055 }
2056
2057 mutex_unlock(&sc->mutex);
2058
2059 return ret;
2060 }
2061
ath9k_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)2062 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2063 struct survey_info *survey)
2064 {
2065 struct ath_softc *sc = hw->priv;
2066 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2067 struct ieee80211_supported_band *sband;
2068 struct ieee80211_channel *chan;
2069 unsigned long flags;
2070 int pos;
2071
2072 if (IS_ENABLED(CONFIG_ATH9K_TX99))
2073 return -EOPNOTSUPP;
2074
2075 spin_lock_irqsave(&common->cc_lock, flags);
2076 if (idx == 0)
2077 ath_update_survey_stats(sc);
2078
2079 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
2080 if (sband && idx >= sband->n_channels) {
2081 idx -= sband->n_channels;
2082 sband = NULL;
2083 }
2084
2085 if (!sband)
2086 sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
2087
2088 if (!sband || idx >= sband->n_channels) {
2089 spin_unlock_irqrestore(&common->cc_lock, flags);
2090 return -ENOENT;
2091 }
2092
2093 chan = &sband->channels[idx];
2094 pos = chan->hw_value;
2095 memcpy(survey, &sc->survey[pos], sizeof(*survey));
2096 survey->channel = chan;
2097 spin_unlock_irqrestore(&common->cc_lock, flags);
2098
2099 return 0;
2100 }
2101
ath9k_enable_dynack(struct ath_softc * sc)2102 static void ath9k_enable_dynack(struct ath_softc *sc)
2103 {
2104 #ifdef CONFIG_ATH9K_DYNACK
2105 u32 rfilt;
2106 struct ath_hw *ah = sc->sc_ah;
2107
2108 ath_dynack_reset(ah);
2109
2110 ah->dynack.enabled = true;
2111 rfilt = ath_calcrxfilter(sc);
2112 ath9k_hw_setrxfilter(ah, rfilt);
2113 #endif
2114 }
2115
ath9k_set_coverage_class(struct ieee80211_hw * hw,s16 coverage_class)2116 static void ath9k_set_coverage_class(struct ieee80211_hw *hw,
2117 s16 coverage_class)
2118 {
2119 struct ath_softc *sc = hw->priv;
2120 struct ath_hw *ah = sc->sc_ah;
2121
2122 if (IS_ENABLED(CONFIG_ATH9K_TX99))
2123 return;
2124
2125 mutex_lock(&sc->mutex);
2126
2127 if (coverage_class >= 0) {
2128 ah->coverage_class = coverage_class;
2129 if (ah->dynack.enabled) {
2130 u32 rfilt;
2131
2132 ah->dynack.enabled = false;
2133 rfilt = ath_calcrxfilter(sc);
2134 ath9k_hw_setrxfilter(ah, rfilt);
2135 }
2136 ath9k_ps_wakeup(sc);
2137 ath9k_hw_init_global_settings(ah);
2138 ath9k_ps_restore(sc);
2139 } else if (!ah->dynack.enabled) {
2140 ath9k_enable_dynack(sc);
2141 }
2142
2143 mutex_unlock(&sc->mutex);
2144 }
2145
ath9k_has_tx_pending(struct ath_softc * sc,bool sw_pending)2146 static bool ath9k_has_tx_pending(struct ath_softc *sc,
2147 bool sw_pending)
2148 {
2149 int i, npend = 0;
2150
2151 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2152 if (!ATH_TXQ_SETUP(sc, i))
2153 continue;
2154
2155 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i],
2156 sw_pending);
2157 if (npend)
2158 break;
2159 }
2160
2161 return !!npend;
2162 }
2163
ath9k_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)2164 static void ath9k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2165 u32 queues, bool drop)
2166 {
2167 struct ath_softc *sc = hw->priv;
2168 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2169
2170 if (ath9k_is_chanctx_enabled()) {
2171 if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
2172 goto flush;
2173
2174 /*
2175 * If MCC is active, extend the flush timeout
2176 * and wait for the HW/SW queues to become
2177 * empty. This needs to be done outside the
2178 * sc->mutex lock to allow the channel scheduler
2179 * to switch channel contexts.
2180 *
2181 * The vif queues have been stopped in mac80211,
2182 * so there won't be any incoming frames.
2183 */
2184 __ath9k_flush(hw, queues, drop, true, true);
2185 return;
2186 }
2187 flush:
2188 mutex_lock(&sc->mutex);
2189 __ath9k_flush(hw, queues, drop, true, false);
2190 mutex_unlock(&sc->mutex);
2191 }
2192
__ath9k_flush(struct ieee80211_hw * hw,u32 queues,bool drop,bool sw_pending,bool timeout_override)2193 void __ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop,
2194 bool sw_pending, bool timeout_override)
2195 {
2196 struct ath_softc *sc = hw->priv;
2197 struct ath_hw *ah = sc->sc_ah;
2198 struct ath_common *common = ath9k_hw_common(ah);
2199 int timeout;
2200 bool drain_txq;
2201
2202 cancel_delayed_work_sync(&sc->hw_check_work);
2203
2204 if (ah->ah_flags & AH_UNPLUGGED) {
2205 ath_dbg(common, ANY, "Device has been unplugged!\n");
2206 return;
2207 }
2208
2209 if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
2210 ath_dbg(common, ANY, "Device not present\n");
2211 return;
2212 }
2213
2214 spin_lock_bh(&sc->chan_lock);
2215 if (timeout_override)
2216 timeout = HZ / 5;
2217 else
2218 timeout = sc->cur_chan->flush_timeout;
2219 spin_unlock_bh(&sc->chan_lock);
2220
2221 ath_dbg(common, CHAN_CTX,
2222 "Flush timeout: %d\n", jiffies_to_msecs(timeout));
2223
2224 if (wait_event_timeout(sc->tx_wait, !ath9k_has_tx_pending(sc, sw_pending),
2225 timeout) > 0)
2226 drop = false;
2227
2228 if (drop) {
2229 ath9k_ps_wakeup(sc);
2230 spin_lock_bh(&sc->sc_pcu_lock);
2231 drain_txq = ath_drain_all_txq(sc);
2232 spin_unlock_bh(&sc->sc_pcu_lock);
2233
2234 if (!drain_txq)
2235 ath_reset(sc, NULL);
2236
2237 ath9k_ps_restore(sc);
2238 }
2239
2240 ieee80211_queue_delayed_work(hw, &sc->hw_check_work,
2241 msecs_to_jiffies(ATH_HW_CHECK_POLL_INT));
2242 }
2243
ath9k_tx_frames_pending(struct ieee80211_hw * hw)2244 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2245 {
2246 struct ath_softc *sc = hw->priv;
2247
2248 return ath9k_has_tx_pending(sc, true);
2249 }
2250
ath9k_tx_last_beacon(struct ieee80211_hw * hw)2251 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2252 {
2253 struct ath_softc *sc = hw->priv;
2254 struct ath_hw *ah = sc->sc_ah;
2255 struct ieee80211_vif *vif;
2256 struct ath_vif *avp;
2257 struct ath_buf *bf;
2258 struct ath_tx_status ts;
2259 bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2260 int status;
2261
2262 vif = sc->beacon.bslot[0];
2263 if (!vif)
2264 return 0;
2265
2266 if (!vif->bss_conf.enable_beacon)
2267 return 0;
2268
2269 avp = (void *)vif->drv_priv;
2270
2271 if (!sc->beacon.tx_processed && !edma) {
2272 tasklet_disable(&sc->bcon_tasklet);
2273
2274 bf = avp->av_bcbuf;
2275 if (!bf || !bf->bf_mpdu)
2276 goto skip;
2277
2278 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2279 if (status == -EINPROGRESS)
2280 goto skip;
2281
2282 sc->beacon.tx_processed = true;
2283 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2284
2285 skip:
2286 tasklet_enable(&sc->bcon_tasklet);
2287 }
2288
2289 return sc->beacon.tx_last;
2290 }
2291
ath9k_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)2292 static int ath9k_get_stats(struct ieee80211_hw *hw,
2293 struct ieee80211_low_level_stats *stats)
2294 {
2295 struct ath_softc *sc = hw->priv;
2296 struct ath_hw *ah = sc->sc_ah;
2297 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2298
2299 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2300 stats->dot11RTSFailureCount = mib_stats->rts_bad;
2301 stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2302 stats->dot11RTSSuccessCount = mib_stats->rts_good;
2303 return 0;
2304 }
2305
fill_chainmask(u32 cap,u32 new)2306 static u32 fill_chainmask(u32 cap, u32 new)
2307 {
2308 u32 filled = 0;
2309 int i;
2310
2311 for (i = 0; cap && new; i++, cap >>= 1) {
2312 if (!(cap & BIT(0)))
2313 continue;
2314
2315 if (new & BIT(0))
2316 filled |= BIT(i);
2317
2318 new >>= 1;
2319 }
2320
2321 return filled;
2322 }
2323
validate_antenna_mask(struct ath_hw * ah,u32 val)2324 static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
2325 {
2326 if (AR_SREV_9300_20_OR_LATER(ah))
2327 return true;
2328
2329 switch (val & 0x7) {
2330 case 0x1:
2331 case 0x3:
2332 case 0x7:
2333 return true;
2334 case 0x2:
2335 return (ah->caps.rx_chainmask == 1);
2336 default:
2337 return false;
2338 }
2339 }
2340
ath9k_set_antenna(struct ieee80211_hw * hw,u32 tx_ant,u32 rx_ant)2341 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2342 {
2343 struct ath_softc *sc = hw->priv;
2344 struct ath_hw *ah = sc->sc_ah;
2345
2346 if (ah->caps.rx_chainmask != 1)
2347 rx_ant |= tx_ant;
2348
2349 if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
2350 return -EINVAL;
2351
2352 sc->ant_rx = rx_ant;
2353 sc->ant_tx = tx_ant;
2354
2355 if (ah->caps.rx_chainmask == 1)
2356 return 0;
2357
2358 /* AR9100 runs into calibration issues if not all rx chains are enabled */
2359 if (AR_SREV_9100(ah))
2360 ah->rxchainmask = 0x7;
2361 else
2362 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2363
2364 ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2365 ath9k_cmn_reload_chainmask(ah);
2366
2367 return 0;
2368 }
2369
ath9k_get_antenna(struct ieee80211_hw * hw,u32 * tx_ant,u32 * rx_ant)2370 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2371 {
2372 struct ath_softc *sc = hw->priv;
2373
2374 *tx_ant = sc->ant_tx;
2375 *rx_ant = sc->ant_rx;
2376 return 0;
2377 }
2378
ath9k_sw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)2379 static void ath9k_sw_scan_start(struct ieee80211_hw *hw,
2380 struct ieee80211_vif *vif,
2381 const u8 *mac_addr)
2382 {
2383 struct ath_softc *sc = hw->priv;
2384 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2385 struct cfg80211_chan_def *chandef = &sc->cur_chan->chandef;
2386 struct ieee80211_channel *chan = chandef->chan;
2387 int pos = chan->hw_value;
2388 set_bit(ATH_OP_SCANNING, &common->op_flags);
2389
2390 /* Reset current survey */
2391 if (!sc->cur_chan->offchannel) {
2392 if (sc->cur_survey != &sc->survey[pos]) {
2393 if (sc->cur_survey)
2394 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
2395 sc->cur_survey = &sc->survey[pos];
2396 }
2397
2398 memset(sc->cur_survey, 0, sizeof(struct survey_info));
2399 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
2400 }
2401 }
2402
ath9k_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)2403 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw,
2404 struct ieee80211_vif *vif)
2405 {
2406 struct ath_softc *sc = hw->priv;
2407 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2408 clear_bit(ATH_OP_SCANNING, &common->op_flags);
2409 }
2410
2411 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
2412
ath9k_cancel_pending_offchannel(struct ath_softc * sc)2413 static void ath9k_cancel_pending_offchannel(struct ath_softc *sc)
2414 {
2415 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2416
2417 if (sc->offchannel.roc_vif) {
2418 ath_dbg(common, CHAN_CTX,
2419 "%s: Aborting RoC\n", __func__);
2420
2421 del_timer_sync(&sc->offchannel.timer);
2422 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
2423 ath_roc_complete(sc, ATH_ROC_COMPLETE_ABORT);
2424 }
2425
2426 if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
2427 ath_dbg(common, CHAN_CTX,
2428 "%s: Aborting HW scan\n", __func__);
2429
2430 del_timer_sync(&sc->offchannel.timer);
2431 ath_scan_complete(sc, true);
2432 }
2433 }
2434
ath9k_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)2435 static int ath9k_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2436 struct ieee80211_scan_request *hw_req)
2437 {
2438 struct cfg80211_scan_request *req = &hw_req->req;
2439 struct ath_softc *sc = hw->priv;
2440 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2441 int ret = 0;
2442
2443 mutex_lock(&sc->mutex);
2444
2445 if (WARN_ON(sc->offchannel.scan_req)) {
2446 ret = -EBUSY;
2447 goto out;
2448 }
2449
2450 ath9k_ps_wakeup(sc);
2451 set_bit(ATH_OP_SCANNING, &common->op_flags);
2452 sc->offchannel.scan_vif = vif;
2453 sc->offchannel.scan_req = req;
2454 sc->offchannel.scan_idx = 0;
2455
2456 ath_dbg(common, CHAN_CTX, "HW scan request received on vif: %pM\n",
2457 vif->addr);
2458
2459 if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2460 ath_dbg(common, CHAN_CTX, "Starting HW scan\n");
2461 ath_offchannel_next(sc);
2462 }
2463
2464 out:
2465 mutex_unlock(&sc->mutex);
2466
2467 return ret;
2468 }
2469
ath9k_cancel_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif)2470 static void ath9k_cancel_hw_scan(struct ieee80211_hw *hw,
2471 struct ieee80211_vif *vif)
2472 {
2473 struct ath_softc *sc = hw->priv;
2474 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2475
2476 ath_dbg(common, CHAN_CTX, "Cancel HW scan on vif: %pM\n", vif->addr);
2477
2478 mutex_lock(&sc->mutex);
2479 del_timer_sync(&sc->offchannel.timer);
2480 ath_scan_complete(sc, true);
2481 mutex_unlock(&sc->mutex);
2482 }
2483
ath9k_remain_on_channel(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel * chan,int duration,enum ieee80211_roc_type type)2484 static int ath9k_remain_on_channel(struct ieee80211_hw *hw,
2485 struct ieee80211_vif *vif,
2486 struct ieee80211_channel *chan, int duration,
2487 enum ieee80211_roc_type type)
2488 {
2489 struct ath_softc *sc = hw->priv;
2490 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2491 int ret = 0;
2492
2493 mutex_lock(&sc->mutex);
2494
2495 if (WARN_ON(sc->offchannel.roc_vif)) {
2496 ret = -EBUSY;
2497 goto out;
2498 }
2499
2500 ath9k_ps_wakeup(sc);
2501 sc->offchannel.roc_vif = vif;
2502 sc->offchannel.roc_chan = chan;
2503 sc->offchannel.roc_duration = duration;
2504
2505 ath_dbg(common, CHAN_CTX,
2506 "RoC request on vif: %pM, type: %d duration: %d\n",
2507 vif->addr, type, duration);
2508
2509 if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2510 ath_dbg(common, CHAN_CTX, "Starting RoC period\n");
2511 ath_offchannel_next(sc);
2512 }
2513
2514 out:
2515 mutex_unlock(&sc->mutex);
2516
2517 return ret;
2518 }
2519
ath9k_cancel_remain_on_channel(struct ieee80211_hw * hw,struct ieee80211_vif * vif)2520 static int ath9k_cancel_remain_on_channel(struct ieee80211_hw *hw,
2521 struct ieee80211_vif *vif)
2522 {
2523 struct ath_softc *sc = hw->priv;
2524 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2525
2526 mutex_lock(&sc->mutex);
2527
2528 ath_dbg(common, CHAN_CTX, "Cancel RoC\n");
2529 del_timer_sync(&sc->offchannel.timer);
2530
2531 if (sc->offchannel.roc_vif) {
2532 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
2533 ath_roc_complete(sc, ATH_ROC_COMPLETE_CANCEL);
2534 }
2535
2536 mutex_unlock(&sc->mutex);
2537
2538 return 0;
2539 }
2540
ath9k_add_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf)2541 static int ath9k_add_chanctx(struct ieee80211_hw *hw,
2542 struct ieee80211_chanctx_conf *conf)
2543 {
2544 struct ath_softc *sc = hw->priv;
2545 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2546 struct ath_chanctx *ctx, **ptr;
2547 int pos;
2548
2549 mutex_lock(&sc->mutex);
2550
2551 ath_for_each_chanctx(sc, ctx) {
2552 if (ctx->assigned)
2553 continue;
2554
2555 ptr = (void *) conf->drv_priv;
2556 *ptr = ctx;
2557 ctx->assigned = true;
2558 pos = ctx - &sc->chanctx[0];
2559 ctx->hw_queue_base = pos * IEEE80211_NUM_ACS;
2560
2561 ath_dbg(common, CHAN_CTX,
2562 "Add channel context: %d MHz\n",
2563 conf->def.chan->center_freq);
2564
2565 ath_chanctx_set_channel(sc, ctx, &conf->def);
2566
2567 mutex_unlock(&sc->mutex);
2568 return 0;
2569 }
2570
2571 mutex_unlock(&sc->mutex);
2572 return -ENOSPC;
2573 }
2574
2575
ath9k_remove_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf)2576 static void ath9k_remove_chanctx(struct ieee80211_hw *hw,
2577 struct ieee80211_chanctx_conf *conf)
2578 {
2579 struct ath_softc *sc = hw->priv;
2580 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2581 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2582
2583 mutex_lock(&sc->mutex);
2584
2585 ath_dbg(common, CHAN_CTX,
2586 "Remove channel context: %d MHz\n",
2587 conf->def.chan->center_freq);
2588
2589 ctx->assigned = false;
2590 ctx->hw_queue_base = 0;
2591 ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_UNASSIGN);
2592
2593 mutex_unlock(&sc->mutex);
2594 }
2595
ath9k_change_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf,u32 changed)2596 static void ath9k_change_chanctx(struct ieee80211_hw *hw,
2597 struct ieee80211_chanctx_conf *conf,
2598 u32 changed)
2599 {
2600 struct ath_softc *sc = hw->priv;
2601 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2602 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2603
2604 mutex_lock(&sc->mutex);
2605 ath_dbg(common, CHAN_CTX,
2606 "Change channel context: %d MHz\n",
2607 conf->def.chan->center_freq);
2608 ath_chanctx_set_channel(sc, ctx, &conf->def);
2609 mutex_unlock(&sc->mutex);
2610 }
2611
ath9k_assign_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * link_conf,struct ieee80211_chanctx_conf * conf)2612 static int ath9k_assign_vif_chanctx(struct ieee80211_hw *hw,
2613 struct ieee80211_vif *vif,
2614 struct ieee80211_bss_conf *link_conf,
2615 struct ieee80211_chanctx_conf *conf)
2616 {
2617 struct ath_softc *sc = hw->priv;
2618 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2619 struct ath_vif *avp = (void *)vif->drv_priv;
2620 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2621 int i;
2622
2623 ath9k_cancel_pending_offchannel(sc);
2624
2625 mutex_lock(&sc->mutex);
2626
2627 ath_dbg(common, CHAN_CTX,
2628 "Assign VIF (addr: %pM, type: %d, p2p: %d) to channel context: %d MHz\n",
2629 vif->addr, vif->type, vif->p2p,
2630 conf->def.chan->center_freq);
2631
2632 avp->chanctx = ctx;
2633 ctx->nvifs_assigned++;
2634 list_add_tail(&avp->list, &ctx->vifs);
2635 ath9k_calculate_summary_state(sc, ctx);
2636 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2637 vif->hw_queue[i] = ctx->hw_queue_base + i;
2638
2639 mutex_unlock(&sc->mutex);
2640
2641 return 0;
2642 }
2643
ath9k_unassign_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * link_conf,struct ieee80211_chanctx_conf * conf)2644 static void ath9k_unassign_vif_chanctx(struct ieee80211_hw *hw,
2645 struct ieee80211_vif *vif,
2646 struct ieee80211_bss_conf *link_conf,
2647 struct ieee80211_chanctx_conf *conf)
2648 {
2649 struct ath_softc *sc = hw->priv;
2650 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2651 struct ath_vif *avp = (void *)vif->drv_priv;
2652 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2653 int ac;
2654
2655 ath9k_cancel_pending_offchannel(sc);
2656
2657 mutex_lock(&sc->mutex);
2658
2659 ath_dbg(common, CHAN_CTX,
2660 "Remove VIF (addr: %pM, type: %d, p2p: %d) from channel context: %d MHz\n",
2661 vif->addr, vif->type, vif->p2p,
2662 conf->def.chan->center_freq);
2663
2664 avp->chanctx = NULL;
2665 ctx->nvifs_assigned--;
2666 list_del(&avp->list);
2667 ath9k_calculate_summary_state(sc, ctx);
2668 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2669 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
2670
2671 mutex_unlock(&sc->mutex);
2672 }
2673
ath9k_mgd_prepare_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_prep_tx_info * info)2674 static void ath9k_mgd_prepare_tx(struct ieee80211_hw *hw,
2675 struct ieee80211_vif *vif,
2676 struct ieee80211_prep_tx_info *info)
2677 {
2678 struct ath_softc *sc = hw->priv;
2679 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2680 struct ath_vif *avp = (struct ath_vif *) vif->drv_priv;
2681 struct ath_beacon_config *cur_conf;
2682 struct ath_chanctx *go_ctx;
2683 unsigned long timeout;
2684 bool changed = false;
2685 u32 beacon_int;
2686
2687 if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
2688 return;
2689
2690 if (!avp->chanctx)
2691 return;
2692
2693 mutex_lock(&sc->mutex);
2694
2695 spin_lock_bh(&sc->chan_lock);
2696 if (sc->next_chan || (sc->cur_chan != avp->chanctx))
2697 changed = true;
2698 spin_unlock_bh(&sc->chan_lock);
2699
2700 if (!changed)
2701 goto out;
2702
2703 ath9k_cancel_pending_offchannel(sc);
2704
2705 go_ctx = ath_is_go_chanctx_present(sc);
2706
2707 if (go_ctx) {
2708 /*
2709 * Wait till the GO interface gets a chance
2710 * to send out an NoA.
2711 */
2712 spin_lock_bh(&sc->chan_lock);
2713 sc->sched.mgd_prepare_tx = true;
2714 cur_conf = &go_ctx->beacon;
2715 beacon_int = TU_TO_USEC(cur_conf->beacon_interval);
2716 spin_unlock_bh(&sc->chan_lock);
2717
2718 timeout = usecs_to_jiffies(beacon_int * 2);
2719 init_completion(&sc->go_beacon);
2720
2721 mutex_unlock(&sc->mutex);
2722
2723 if (wait_for_completion_timeout(&sc->go_beacon,
2724 timeout) == 0) {
2725 ath_dbg(common, CHAN_CTX,
2726 "Failed to send new NoA\n");
2727
2728 spin_lock_bh(&sc->chan_lock);
2729 sc->sched.mgd_prepare_tx = false;
2730 spin_unlock_bh(&sc->chan_lock);
2731 }
2732
2733 mutex_lock(&sc->mutex);
2734 }
2735
2736 ath_dbg(common, CHAN_CTX,
2737 "%s: Set chanctx state to FORCE_ACTIVE for vif: %pM\n",
2738 __func__, vif->addr);
2739
2740 spin_lock_bh(&sc->chan_lock);
2741 sc->next_chan = avp->chanctx;
2742 sc->sched.state = ATH_CHANCTX_STATE_FORCE_ACTIVE;
2743 spin_unlock_bh(&sc->chan_lock);
2744
2745 ath_chanctx_set_next(sc, true);
2746 out:
2747 mutex_unlock(&sc->mutex);
2748 }
2749
ath9k_fill_chanctx_ops(void)2750 void ath9k_fill_chanctx_ops(void)
2751 {
2752 if (!ath9k_is_chanctx_enabled())
2753 return;
2754
2755 ath9k_ops.hw_scan = ath9k_hw_scan;
2756 ath9k_ops.cancel_hw_scan = ath9k_cancel_hw_scan;
2757 ath9k_ops.remain_on_channel = ath9k_remain_on_channel;
2758 ath9k_ops.cancel_remain_on_channel = ath9k_cancel_remain_on_channel;
2759 ath9k_ops.add_chanctx = ath9k_add_chanctx;
2760 ath9k_ops.remove_chanctx = ath9k_remove_chanctx;
2761 ath9k_ops.change_chanctx = ath9k_change_chanctx;
2762 ath9k_ops.assign_vif_chanctx = ath9k_assign_vif_chanctx;
2763 ath9k_ops.unassign_vif_chanctx = ath9k_unassign_vif_chanctx;
2764 ath9k_ops.mgd_prepare_tx = ath9k_mgd_prepare_tx;
2765 }
2766
2767 #endif
2768
ath9k_get_txpower(struct ieee80211_hw * hw,struct ieee80211_vif * vif,int * dbm)2769 static int ath9k_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2770 int *dbm)
2771 {
2772 struct ath_softc *sc = hw->priv;
2773 struct ath_vif *avp = (void *)vif->drv_priv;
2774
2775 mutex_lock(&sc->mutex);
2776 if (avp->chanctx)
2777 *dbm = avp->chanctx->cur_txpower;
2778 else
2779 *dbm = sc->cur_chan->cur_txpower;
2780 mutex_unlock(&sc->mutex);
2781
2782 *dbm /= 2;
2783
2784 return 0;
2785 }
2786
2787 struct ieee80211_ops ath9k_ops = {
2788 .add_chanctx = ieee80211_emulate_add_chanctx,
2789 .remove_chanctx = ieee80211_emulate_remove_chanctx,
2790 .change_chanctx = ieee80211_emulate_change_chanctx,
2791 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
2792 .tx = ath9k_tx,
2793 .start = ath9k_start,
2794 .stop = ath9k_stop,
2795 .add_interface = ath9k_add_interface,
2796 .change_interface = ath9k_change_interface,
2797 .remove_interface = ath9k_remove_interface,
2798 .config = ath9k_config,
2799 .configure_filter = ath9k_configure_filter,
2800 .sta_state = ath9k_sta_state,
2801 .sta_notify = ath9k_sta_notify,
2802 .conf_tx = ath9k_conf_tx,
2803 .bss_info_changed = ath9k_bss_info_changed,
2804 .set_key = ath9k_set_key,
2805 .get_tsf = ath9k_get_tsf,
2806 .set_tsf = ath9k_set_tsf,
2807 .reset_tsf = ath9k_reset_tsf,
2808 .ampdu_action = ath9k_ampdu_action,
2809 .get_survey = ath9k_get_survey,
2810 .rfkill_poll = ath9k_rfkill_poll_state,
2811 .set_coverage_class = ath9k_set_coverage_class,
2812 .flush = ath9k_flush,
2813 .tx_frames_pending = ath9k_tx_frames_pending,
2814 .tx_last_beacon = ath9k_tx_last_beacon,
2815 .release_buffered_frames = ath9k_release_buffered_frames,
2816 .get_stats = ath9k_get_stats,
2817 .set_antenna = ath9k_set_antenna,
2818 .get_antenna = ath9k_get_antenna,
2819
2820 #ifdef CONFIG_ATH9K_WOW
2821 .suspend = ath9k_suspend,
2822 .resume = ath9k_resume,
2823 .set_wakeup = ath9k_set_wakeup,
2824 #endif
2825
2826 #ifdef CONFIG_ATH9K_DEBUGFS
2827 .get_et_sset_count = ath9k_get_et_sset_count,
2828 .get_et_stats = ath9k_get_et_stats,
2829 .get_et_strings = ath9k_get_et_strings,
2830 #endif
2831
2832 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_STATION_STATISTICS)
2833 .sta_add_debugfs = ath9k_sta_add_debugfs,
2834 #endif
2835 .sw_scan_start = ath9k_sw_scan_start,
2836 .sw_scan_complete = ath9k_sw_scan_complete,
2837 .get_txpower = ath9k_get_txpower,
2838 .wake_tx_queue = ath9k_wake_tx_queue,
2839 };
2840