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
ath9k_parse_mpdudensity(u8 mpdudensity)22 u8 ath9k_parse_mpdudensity(u8 mpdudensity)
23 {
24 /*
25 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
26 * 0 for no restriction
27 * 1 for 1/4 us
28 * 2 for 1/2 us
29 * 3 for 1 us
30 * 4 for 2 us
31 * 5 for 4 us
32 * 6 for 8 us
33 * 7 for 16 us
34 */
35 switch (mpdudensity) {
36 case 0:
37 return 0;
38 case 1:
39 case 2:
40 case 3:
41 /* Our lower layer calculations limit our precision to
42 1 microsecond */
43 return 1;
44 case 4:
45 return 2;
46 case 5:
47 return 4;
48 case 6:
49 return 8;
50 case 7:
51 return 16;
52 default:
53 return 0;
54 }
55 }
56
ath9k_has_pending_frames(struct ath_softc * sc,struct ath_txq * txq,bool sw_pending)57 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq,
58 bool sw_pending)
59 {
60 bool pending = false;
61
62 spin_lock_bh(&txq->axq_lock);
63
64 if (txq->axq_depth) {
65 pending = true;
66 goto out;
67 }
68
69 if (!sw_pending)
70 goto out;
71
72 if (txq->mac80211_qnum >= 0) {
73 struct ath_acq *acq;
74
75 acq = &sc->cur_chan->acq[txq->mac80211_qnum];
76 if (!list_empty(&acq->acq_new) || !list_empty(&acq->acq_old))
77 pending = true;
78 }
79 out:
80 spin_unlock_bh(&txq->axq_lock);
81 return pending;
82 }
83
ath9k_setpower(struct ath_softc * sc,enum ath9k_power_mode mode)84 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
85 {
86 unsigned long flags;
87 bool ret;
88
89 spin_lock_irqsave(&sc->sc_pm_lock, flags);
90 ret = ath9k_hw_setpower(sc->sc_ah, mode);
91 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
92
93 return ret;
94 }
95
ath_ps_full_sleep(struct timer_list * t)96 void ath_ps_full_sleep(struct timer_list *t)
97 {
98 struct ath_softc *sc = from_timer(sc, t, sleep_timer);
99 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
100 unsigned long flags;
101 bool reset;
102
103 spin_lock_irqsave(&common->cc_lock, flags);
104 ath_hw_cycle_counters_update(common);
105 spin_unlock_irqrestore(&common->cc_lock, flags);
106
107 ath9k_hw_setrxabort(sc->sc_ah, 1);
108 ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
109
110 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
111 }
112
ath9k_ps_wakeup(struct ath_softc * sc)113 void ath9k_ps_wakeup(struct ath_softc *sc)
114 {
115 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
116 unsigned long flags;
117 enum ath9k_power_mode power_mode;
118
119 spin_lock_irqsave(&sc->sc_pm_lock, flags);
120 if (++sc->ps_usecount != 1)
121 goto unlock;
122
123 del_timer_sync(&sc->sleep_timer);
124 power_mode = sc->sc_ah->power_mode;
125 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
126
127 /*
128 * While the hardware is asleep, the cycle counters contain no
129 * useful data. Better clear them now so that they don't mess up
130 * survey data results.
131 */
132 if (power_mode != ATH9K_PM_AWAKE) {
133 spin_lock(&common->cc_lock);
134 ath_hw_cycle_counters_update(common);
135 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
136 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
137 spin_unlock(&common->cc_lock);
138 }
139
140 unlock:
141 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
142 }
143
ath9k_ps_restore(struct ath_softc * sc)144 void ath9k_ps_restore(struct ath_softc *sc)
145 {
146 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
147 enum ath9k_power_mode mode;
148 unsigned long flags;
149
150 spin_lock_irqsave(&sc->sc_pm_lock, flags);
151 if (--sc->ps_usecount != 0)
152 goto unlock;
153
154 if (sc->ps_idle) {
155 mod_timer(&sc->sleep_timer, jiffies + HZ / 10);
156 goto unlock;
157 }
158
159 if (sc->ps_enabled &&
160 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
161 PS_WAIT_FOR_CAB |
162 PS_WAIT_FOR_PSPOLL_DATA |
163 PS_WAIT_FOR_TX_ACK |
164 PS_WAIT_FOR_ANI))) {
165 mode = ATH9K_PM_NETWORK_SLEEP;
166 if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
167 ath9k_btcoex_stop_gen_timer(sc);
168 } else {
169 goto unlock;
170 }
171
172 spin_lock(&common->cc_lock);
173 ath_hw_cycle_counters_update(common);
174 spin_unlock(&common->cc_lock);
175
176 ath9k_hw_setpower(sc->sc_ah, mode);
177
178 unlock:
179 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
180 }
181
__ath_cancel_work(struct ath_softc * sc)182 static void __ath_cancel_work(struct ath_softc *sc)
183 {
184 cancel_work_sync(&sc->paprd_work);
185 cancel_delayed_work_sync(&sc->hw_check_work);
186 cancel_delayed_work_sync(&sc->hw_pll_work);
187
188 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
189 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
190 cancel_work_sync(&sc->mci_work);
191 #endif
192 }
193
ath_cancel_work(struct ath_softc * sc)194 void ath_cancel_work(struct ath_softc *sc)
195 {
196 __ath_cancel_work(sc);
197 cancel_work_sync(&sc->hw_reset_work);
198 }
199
ath_restart_work(struct ath_softc * sc)200 void ath_restart_work(struct ath_softc *sc)
201 {
202 ieee80211_queue_delayed_work(sc->hw, &sc->hw_check_work,
203 ATH_HW_CHECK_POLL_INT);
204
205 if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah))
206 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
207 msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
208
209 ath_start_ani(sc);
210 }
211
ath_prepare_reset(struct ath_softc * sc)212 static bool ath_prepare_reset(struct ath_softc *sc)
213 {
214 struct ath_hw *ah = sc->sc_ah;
215 bool ret = true;
216
217 ieee80211_stop_queues(sc->hw);
218 ath_stop_ani(sc);
219 ath9k_hw_disable_interrupts(ah);
220
221 if (AR_SREV_9300_20_OR_LATER(ah)) {
222 ret &= ath_stoprecv(sc);
223 ret &= ath_drain_all_txq(sc);
224 } else {
225 ret &= ath_drain_all_txq(sc);
226 ret &= ath_stoprecv(sc);
227 }
228
229 return ret;
230 }
231
ath_complete_reset(struct ath_softc * sc,bool start)232 static bool ath_complete_reset(struct ath_softc *sc, bool start)
233 {
234 struct ath_hw *ah = sc->sc_ah;
235 struct ath_common *common = ath9k_hw_common(ah);
236 unsigned long flags;
237
238 ath9k_calculate_summary_state(sc, sc->cur_chan);
239 ath_startrecv(sc);
240 ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
241 sc->cur_chan->txpower,
242 &sc->cur_chan->cur_txpower);
243 clear_bit(ATH_OP_HW_RESET, &common->op_flags);
244
245 if (!sc->cur_chan->offchannel && start) {
246 /* restore per chanctx TSF timer */
247 if (sc->cur_chan->tsf_val) {
248 u32 offset;
249
250 offset = ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts,
251 NULL);
252 ath9k_hw_settsf64(ah, sc->cur_chan->tsf_val + offset);
253 }
254
255
256 if (!test_bit(ATH_OP_BEACONS, &common->op_flags))
257 goto work;
258
259 if (ah->opmode == NL80211_IFTYPE_STATION &&
260 test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
261 spin_lock_irqsave(&sc->sc_pm_lock, flags);
262 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
263 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
264 } else {
265 ath9k_set_beacon(sc);
266 }
267 work:
268 ath_restart_work(sc);
269 ath_txq_schedule_all(sc);
270 }
271
272 sc->gtt_cnt = 0;
273
274 ath9k_hw_set_interrupts(ah);
275 ath9k_hw_enable_interrupts(ah);
276 ieee80211_wake_queues(sc->hw);
277 ath9k_p2p_ps_timer(sc);
278
279 return true;
280 }
281
ath_reset_internal(struct ath_softc * sc,struct ath9k_channel * hchan)282 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
283 {
284 struct ath_hw *ah = sc->sc_ah;
285 struct ath_common *common = ath9k_hw_common(ah);
286 struct ath9k_hw_cal_data *caldata = NULL;
287 bool fastcc = true;
288 int r;
289
290 __ath_cancel_work(sc);
291
292 disable_irq(sc->irq);
293 tasklet_disable(&sc->intr_tq);
294 tasklet_disable(&sc->bcon_tasklet);
295 spin_lock_bh(&sc->sc_pcu_lock);
296
297 if (!sc->cur_chan->offchannel) {
298 fastcc = false;
299 caldata = &sc->cur_chan->caldata;
300 }
301
302 if (!hchan) {
303 fastcc = false;
304 hchan = ah->curchan;
305 }
306
307 if (!ath_prepare_reset(sc))
308 fastcc = false;
309
310 if (ath9k_is_chanctx_enabled())
311 fastcc = false;
312
313 spin_lock_bh(&sc->chan_lock);
314 sc->cur_chandef = sc->cur_chan->chandef;
315 spin_unlock_bh(&sc->chan_lock);
316
317 ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
318 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
319
320 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
321 if (r) {
322 ath_err(common,
323 "Unable to reset channel, reset status %d\n", r);
324
325 ath9k_hw_enable_interrupts(ah);
326 ath9k_queue_reset(sc, RESET_TYPE_BB_HANG);
327
328 goto out;
329 }
330
331 if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
332 sc->cur_chan->offchannel)
333 ath9k_mci_set_txpower(sc, true, false);
334
335 if (!ath_complete_reset(sc, true))
336 r = -EIO;
337
338 out:
339 enable_irq(sc->irq);
340 spin_unlock_bh(&sc->sc_pcu_lock);
341 tasklet_enable(&sc->bcon_tasklet);
342 tasklet_enable(&sc->intr_tq);
343
344 return r;
345 }
346
ath_node_attach(struct ath_softc * sc,struct ieee80211_sta * sta,struct ieee80211_vif * vif)347 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
348 struct ieee80211_vif *vif)
349 {
350 struct ath_node *an;
351 an = (struct ath_node *)sta->drv_priv;
352
353 an->sc = sc;
354 an->sta = sta;
355 an->vif = vif;
356 memset(&an->key_idx, 0, sizeof(an->key_idx));
357
358 ath_tx_node_init(sc, an);
359
360 ath_dynack_node_init(sc->sc_ah, an);
361 }
362
ath_node_detach(struct ath_softc * sc,struct ieee80211_sta * sta)363 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
364 {
365 struct ath_node *an = (struct ath_node *)sta->drv_priv;
366 ath_tx_node_cleanup(sc, an);
367
368 ath_dynack_node_deinit(sc->sc_ah, an);
369 }
370
ath9k_tasklet(unsigned long data)371 void ath9k_tasklet(unsigned long data)
372 {
373 struct ath_softc *sc = (struct ath_softc *)data;
374 struct ath_hw *ah = sc->sc_ah;
375 struct ath_common *common = ath9k_hw_common(ah);
376 enum ath_reset_type type;
377 unsigned long flags;
378 u32 status;
379 u32 rxmask;
380
381 spin_lock_irqsave(&sc->intr_lock, flags);
382 status = sc->intrstatus;
383 sc->intrstatus = 0;
384 spin_unlock_irqrestore(&sc->intr_lock, flags);
385
386 ath9k_ps_wakeup(sc);
387 spin_lock(&sc->sc_pcu_lock);
388
389 if (status & ATH9K_INT_FATAL) {
390 type = RESET_TYPE_FATAL_INT;
391 ath9k_queue_reset(sc, type);
392 ath_dbg(common, RESET, "FATAL: Skipping interrupts\n");
393 goto out;
394 }
395
396 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
397 (status & ATH9K_INT_BB_WATCHDOG)) {
398 spin_lock_irqsave(&common->cc_lock, flags);
399 ath_hw_cycle_counters_update(common);
400 ar9003_hw_bb_watchdog_dbg_info(ah);
401 spin_unlock_irqrestore(&common->cc_lock, flags);
402
403 if (ar9003_hw_bb_watchdog_check(ah)) {
404 type = RESET_TYPE_BB_WATCHDOG;
405 ath9k_queue_reset(sc, type);
406
407 ath_dbg(common, RESET,
408 "BB_WATCHDOG: Skipping interrupts\n");
409 goto out;
410 }
411 }
412
413 if (status & ATH9K_INT_GTT) {
414 sc->gtt_cnt++;
415
416 if ((sc->gtt_cnt >= MAX_GTT_CNT) && !ath9k_hw_check_alive(ah)) {
417 type = RESET_TYPE_TX_GTT;
418 ath9k_queue_reset(sc, type);
419 ath_dbg(common, RESET,
420 "GTT: Skipping interrupts\n");
421 goto out;
422 }
423 }
424
425 spin_lock_irqsave(&sc->sc_pm_lock, flags);
426 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
427 /*
428 * TSF sync does not look correct; remain awake to sync with
429 * the next Beacon.
430 */
431 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
432 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
433 }
434 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
435
436 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
437 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
438 ATH9K_INT_RXORN);
439 else
440 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
441
442 if (status & rxmask) {
443 /* Check for high priority Rx first */
444 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
445 (status & ATH9K_INT_RXHP))
446 ath_rx_tasklet(sc, 0, true);
447
448 ath_rx_tasklet(sc, 0, false);
449 }
450
451 if (status & ATH9K_INT_TX) {
452 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
453 /*
454 * For EDMA chips, TX completion is enabled for the
455 * beacon queue, so if a beacon has been transmitted
456 * successfully after a GTT interrupt, the GTT counter
457 * gets reset to zero here.
458 */
459 sc->gtt_cnt = 0;
460
461 ath_tx_edma_tasklet(sc);
462 } else {
463 ath_tx_tasklet(sc);
464 }
465
466 wake_up(&sc->tx_wait);
467 }
468
469 if (status & ATH9K_INT_GENTIMER)
470 ath_gen_timer_isr(sc->sc_ah);
471
472 ath9k_btcoex_handle_interrupt(sc, status);
473
474 /* re-enable hardware interrupt */
475 ath9k_hw_resume_interrupts(ah);
476 out:
477 spin_unlock(&sc->sc_pcu_lock);
478 ath9k_ps_restore(sc);
479 }
480
ath_isr(int irq,void * dev)481 irqreturn_t ath_isr(int irq, void *dev)
482 {
483 #define SCHED_INTR ( \
484 ATH9K_INT_FATAL | \
485 ATH9K_INT_BB_WATCHDOG | \
486 ATH9K_INT_RXORN | \
487 ATH9K_INT_RXEOL | \
488 ATH9K_INT_RX | \
489 ATH9K_INT_RXLP | \
490 ATH9K_INT_RXHP | \
491 ATH9K_INT_TX | \
492 ATH9K_INT_BMISS | \
493 ATH9K_INT_CST | \
494 ATH9K_INT_GTT | \
495 ATH9K_INT_TSFOOR | \
496 ATH9K_INT_GENTIMER | \
497 ATH9K_INT_MCI)
498
499 struct ath_softc *sc = dev;
500 struct ath_hw *ah = sc->sc_ah;
501 struct ath_common *common = ath9k_hw_common(ah);
502 enum ath9k_int status;
503 u32 sync_cause = 0;
504 bool sched = false;
505
506 /*
507 * The hardware is not ready/present, don't
508 * touch anything. Note this can happen early
509 * on if the IRQ is shared.
510 */
511 if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags))
512 return IRQ_NONE;
513
514 /* shared irq, not for us */
515 if (!ath9k_hw_intrpend(ah))
516 return IRQ_NONE;
517
518 /*
519 * Figure out the reason(s) for the interrupt. Note
520 * that the hal returns a pseudo-ISR that may include
521 * bits we haven't explicitly enabled so we mask the
522 * value to insure we only process bits we requested.
523 */
524 ath9k_hw_getisr(ah, &status, &sync_cause); /* NB: clears ISR too */
525 ath9k_debug_sync_cause(sc, sync_cause);
526 status &= ah->imask; /* discard unasked-for bits */
527
528 if (test_bit(ATH_OP_HW_RESET, &common->op_flags))
529 return IRQ_HANDLED;
530
531 /*
532 * If there are no status bits set, then this interrupt was not
533 * for me (should have been caught above).
534 */
535 if (!status)
536 return IRQ_NONE;
537
538 /* Cache the status */
539 spin_lock(&sc->intr_lock);
540 sc->intrstatus |= status;
541 spin_unlock(&sc->intr_lock);
542
543 if (status & SCHED_INTR)
544 sched = true;
545
546 /*
547 * If a FATAL interrupt is received, we have to reset the chip
548 * immediately.
549 */
550 if (status & ATH9K_INT_FATAL)
551 goto chip_reset;
552
553 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
554 (status & ATH9K_INT_BB_WATCHDOG))
555 goto chip_reset;
556
557 if (status & ATH9K_INT_SWBA)
558 tasklet_schedule(&sc->bcon_tasklet);
559
560 if (status & ATH9K_INT_TXURN)
561 ath9k_hw_updatetxtriglevel(ah, true);
562
563 if (status & ATH9K_INT_RXEOL) {
564 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
565 ath9k_hw_set_interrupts(ah);
566 }
567
568 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
569 if (status & ATH9K_INT_TIM_TIMER) {
570 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
571 goto chip_reset;
572 /* Clear RxAbort bit so that we can
573 * receive frames */
574 ath9k_setpower(sc, ATH9K_PM_AWAKE);
575 spin_lock(&sc->sc_pm_lock);
576 ath9k_hw_setrxabort(sc->sc_ah, 0);
577 sc->ps_flags |= PS_WAIT_FOR_BEACON;
578 spin_unlock(&sc->sc_pm_lock);
579 }
580
581 chip_reset:
582
583 ath_debug_stat_interrupt(sc, status);
584
585 if (sched) {
586 /* turn off every interrupt */
587 ath9k_hw_kill_interrupts(ah);
588 tasklet_schedule(&sc->intr_tq);
589 }
590
591 return IRQ_HANDLED;
592
593 #undef SCHED_INTR
594 }
595
596 /*
597 * This function is called when a HW reset cannot be deferred
598 * and has to be immediate.
599 */
ath_reset(struct ath_softc * sc,struct ath9k_channel * hchan)600 int ath_reset(struct ath_softc *sc, struct ath9k_channel *hchan)
601 {
602 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
603 int r;
604
605 ath9k_hw_kill_interrupts(sc->sc_ah);
606 set_bit(ATH_OP_HW_RESET, &common->op_flags);
607
608 ath9k_ps_wakeup(sc);
609 r = ath_reset_internal(sc, hchan);
610 ath9k_ps_restore(sc);
611
612 return r;
613 }
614
615 /*
616 * When a HW reset can be deferred, it is added to the
617 * hw_reset_work workqueue, but we set ATH_OP_HW_RESET before
618 * queueing.
619 */
ath9k_queue_reset(struct ath_softc * sc,enum ath_reset_type type)620 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
621 {
622 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
623 #ifdef CONFIG_ATH9K_DEBUGFS
624 RESET_STAT_INC(sc, type);
625 #endif
626 ath9k_hw_kill_interrupts(sc->sc_ah);
627 set_bit(ATH_OP_HW_RESET, &common->op_flags);
628 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
629 }
630
ath_reset_work(struct work_struct * work)631 void ath_reset_work(struct work_struct *work)
632 {
633 struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
634
635 ath9k_ps_wakeup(sc);
636 ath_reset_internal(sc, NULL);
637 ath9k_ps_restore(sc);
638 }
639
640 /**********************/
641 /* mac80211 callbacks */
642 /**********************/
643
ath9k_start(struct ieee80211_hw * hw)644 static int ath9k_start(struct ieee80211_hw *hw)
645 {
646 struct ath_softc *sc = hw->priv;
647 struct ath_hw *ah = sc->sc_ah;
648 struct ath_common *common = ath9k_hw_common(ah);
649 struct ieee80211_channel *curchan = sc->cur_chan->chandef.chan;
650 struct ath_chanctx *ctx = sc->cur_chan;
651 struct ath9k_channel *init_channel;
652 int r;
653
654 ath_dbg(common, CONFIG,
655 "Starting driver with initial channel: %d MHz\n",
656 curchan->center_freq);
657
658 ath9k_ps_wakeup(sc);
659 mutex_lock(&sc->mutex);
660
661 init_channel = ath9k_cmn_get_channel(hw, ah, &ctx->chandef);
662 sc->cur_chandef = hw->conf.chandef;
663
664 /* Reset SERDES registers */
665 ath9k_hw_configpcipowersave(ah, false);
666
667 /*
668 * The basic interface to setting the hardware in a good
669 * state is ``reset''. On return the hardware is known to
670 * be powered up and with interrupts disabled. This must
671 * be followed by initialization of the appropriate bits
672 * and then setup of the interrupt mask.
673 */
674 spin_lock_bh(&sc->sc_pcu_lock);
675
676 atomic_set(&ah->intr_ref_cnt, -1);
677
678 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
679 if (r) {
680 ath_err(common,
681 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
682 r, curchan->center_freq);
683 ah->reset_power_on = false;
684 }
685
686 /* Setup our intr mask. */
687 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
688 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
689 ATH9K_INT_GLOBAL;
690
691 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
692 ah->imask |= ATH9K_INT_RXHP |
693 ATH9K_INT_RXLP;
694 else
695 ah->imask |= ATH9K_INT_RX;
696
697 if (ah->config.hw_hang_checks & HW_BB_WATCHDOG)
698 ah->imask |= ATH9K_INT_BB_WATCHDOG;
699
700 /*
701 * Enable GTT interrupts only for AR9003/AR9004 chips
702 * for now.
703 */
704 if (AR_SREV_9300_20_OR_LATER(ah))
705 ah->imask |= ATH9K_INT_GTT;
706
707 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
708 ah->imask |= ATH9K_INT_CST;
709
710 ath_mci_enable(sc);
711
712 clear_bit(ATH_OP_INVALID, &common->op_flags);
713 sc->sc_ah->is_monitoring = false;
714
715 if (!ath_complete_reset(sc, false))
716 ah->reset_power_on = false;
717
718 if (ah->led_pin >= 0) {
719 ath9k_hw_set_gpio(ah, ah->led_pin,
720 (ah->config.led_active_high) ? 1 : 0);
721 ath9k_hw_gpio_request_out(ah, ah->led_pin, NULL,
722 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
723 }
724
725 /*
726 * Reset key cache to sane defaults (all entries cleared) instead of
727 * semi-random values after suspend/resume.
728 */
729 ath9k_cmn_init_crypto(sc->sc_ah);
730
731 ath9k_hw_reset_tsf(ah);
732
733 spin_unlock_bh(&sc->sc_pcu_lock);
734
735 ath9k_rng_start(sc);
736
737 mutex_unlock(&sc->mutex);
738
739 ath9k_ps_restore(sc);
740
741 return 0;
742 }
743
ath9k_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)744 static void ath9k_tx(struct ieee80211_hw *hw,
745 struct ieee80211_tx_control *control,
746 struct sk_buff *skb)
747 {
748 struct ath_softc *sc = hw->priv;
749 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
750 struct ath_tx_control txctl;
751 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
752 unsigned long flags;
753
754 if (sc->ps_enabled) {
755 /*
756 * mac80211 does not set PM field for normal data frames, so we
757 * need to update that based on the current PS mode.
758 */
759 if (ieee80211_is_data(hdr->frame_control) &&
760 !ieee80211_is_nullfunc(hdr->frame_control) &&
761 !ieee80211_has_pm(hdr->frame_control)) {
762 ath_dbg(common, PS,
763 "Add PM=1 for a TX frame while in PS mode\n");
764 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
765 }
766 }
767
768 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
769 /*
770 * We are using PS-Poll and mac80211 can request TX while in
771 * power save mode. Need to wake up hardware for the TX to be
772 * completed and if needed, also for RX of buffered frames.
773 */
774 ath9k_ps_wakeup(sc);
775 spin_lock_irqsave(&sc->sc_pm_lock, flags);
776 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
777 ath9k_hw_setrxabort(sc->sc_ah, 0);
778 if (ieee80211_is_pspoll(hdr->frame_control)) {
779 ath_dbg(common, PS,
780 "Sending PS-Poll to pick a buffered frame\n");
781 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
782 } else {
783 ath_dbg(common, PS, "Wake up to complete TX\n");
784 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
785 }
786 /*
787 * The actual restore operation will happen only after
788 * the ps_flags bit is cleared. We are just dropping
789 * the ps_usecount here.
790 */
791 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
792 ath9k_ps_restore(sc);
793 }
794
795 /*
796 * Cannot tx while the hardware is in full sleep, it first needs a full
797 * chip reset to recover from that
798 */
799 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
800 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
801 goto exit;
802 }
803
804 memset(&txctl, 0, sizeof(struct ath_tx_control));
805 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
806 txctl.sta = control->sta;
807
808 ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
809
810 if (ath_tx_start(hw, skb, &txctl) != 0) {
811 ath_dbg(common, XMIT, "TX failed\n");
812 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
813 goto exit;
814 }
815
816 return;
817 exit:
818 ieee80211_free_txskb(hw, skb);
819 }
820
ath9k_stop(struct ieee80211_hw * hw)821 static void ath9k_stop(struct ieee80211_hw *hw)
822 {
823 struct ath_softc *sc = hw->priv;
824 struct ath_hw *ah = sc->sc_ah;
825 struct ath_common *common = ath9k_hw_common(ah);
826 bool prev_idle;
827
828 ath9k_deinit_channel_context(sc);
829
830 mutex_lock(&sc->mutex);
831
832 ath9k_rng_stop(sc);
833
834 ath_cancel_work(sc);
835
836 if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
837 ath_dbg(common, ANY, "Device not present\n");
838 mutex_unlock(&sc->mutex);
839 return;
840 }
841
842 /* Ensure HW is awake when we try to shut it down. */
843 ath9k_ps_wakeup(sc);
844
845 spin_lock_bh(&sc->sc_pcu_lock);
846
847 /* prevent tasklets to enable interrupts once we disable them */
848 ah->imask &= ~ATH9K_INT_GLOBAL;
849
850 /* make sure h/w will not generate any interrupt
851 * before setting the invalid flag. */
852 ath9k_hw_disable_interrupts(ah);
853
854 spin_unlock_bh(&sc->sc_pcu_lock);
855
856 /* we can now sync irq and kill any running tasklets, since we already
857 * disabled interrupts and not holding a spin lock */
858 synchronize_irq(sc->irq);
859 tasklet_kill(&sc->intr_tq);
860 tasklet_kill(&sc->bcon_tasklet);
861
862 prev_idle = sc->ps_idle;
863 sc->ps_idle = true;
864
865 spin_lock_bh(&sc->sc_pcu_lock);
866
867 if (ah->led_pin >= 0) {
868 ath9k_hw_set_gpio(ah, ah->led_pin,
869 (ah->config.led_active_high) ? 0 : 1);
870 ath9k_hw_gpio_request_in(ah, ah->led_pin, NULL);
871 }
872
873 ath_prepare_reset(sc);
874
875 if (sc->rx.frag) {
876 dev_kfree_skb_any(sc->rx.frag);
877 sc->rx.frag = NULL;
878 }
879
880 if (!ah->curchan)
881 ah->curchan = ath9k_cmn_get_channel(hw, ah,
882 &sc->cur_chan->chandef);
883
884 ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
885
886 set_bit(ATH_OP_INVALID, &common->op_flags);
887
888 ath9k_hw_phy_disable(ah);
889
890 ath9k_hw_configpcipowersave(ah, true);
891
892 spin_unlock_bh(&sc->sc_pcu_lock);
893
894 ath9k_ps_restore(sc);
895
896 sc->ps_idle = prev_idle;
897
898 mutex_unlock(&sc->mutex);
899
900 ath_dbg(common, CONFIG, "Driver halt\n");
901 }
902
ath9k_uses_beacons(int type)903 static bool ath9k_uses_beacons(int type)
904 {
905 switch (type) {
906 case NL80211_IFTYPE_AP:
907 case NL80211_IFTYPE_ADHOC:
908 case NL80211_IFTYPE_MESH_POINT:
909 return true;
910 default:
911 return false;
912 }
913 }
914
ath9k_vif_iter_set_beacon(struct ath9k_vif_iter_data * iter_data,struct ieee80211_vif * vif)915 static void ath9k_vif_iter_set_beacon(struct ath9k_vif_iter_data *iter_data,
916 struct ieee80211_vif *vif)
917 {
918 /* Use the first (configured) interface, but prefering AP interfaces. */
919 if (!iter_data->primary_beacon_vif) {
920 iter_data->primary_beacon_vif = vif;
921 } else {
922 if (iter_data->primary_beacon_vif->type != NL80211_IFTYPE_AP &&
923 vif->type == NL80211_IFTYPE_AP)
924 iter_data->primary_beacon_vif = vif;
925 }
926
927 iter_data->beacons = true;
928 iter_data->nbcnvifs += 1;
929 }
930
ath9k_vif_iter(struct ath9k_vif_iter_data * iter_data,u8 * mac,struct ieee80211_vif * vif)931 static void ath9k_vif_iter(struct ath9k_vif_iter_data *iter_data,
932 u8 *mac, struct ieee80211_vif *vif)
933 {
934 struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
935 int i;
936
937 if (iter_data->has_hw_macaddr) {
938 for (i = 0; i < ETH_ALEN; i++)
939 iter_data->mask[i] &=
940 ~(iter_data->hw_macaddr[i] ^ mac[i]);
941 } else {
942 memcpy(iter_data->hw_macaddr, mac, ETH_ALEN);
943 iter_data->has_hw_macaddr = true;
944 }
945
946 if (!vif->bss_conf.use_short_slot)
947 iter_data->slottime = 20;
948
949 switch (vif->type) {
950 case NL80211_IFTYPE_AP:
951 iter_data->naps++;
952 if (vif->bss_conf.enable_beacon)
953 ath9k_vif_iter_set_beacon(iter_data, vif);
954 break;
955 case NL80211_IFTYPE_STATION:
956 iter_data->nstations++;
957 if (avp->assoc && !iter_data->primary_sta)
958 iter_data->primary_sta = vif;
959 break;
960 case NL80211_IFTYPE_OCB:
961 iter_data->nocbs++;
962 break;
963 case NL80211_IFTYPE_ADHOC:
964 iter_data->nadhocs++;
965 if (vif->bss_conf.enable_beacon)
966 ath9k_vif_iter_set_beacon(iter_data, vif);
967 break;
968 case NL80211_IFTYPE_MESH_POINT:
969 iter_data->nmeshes++;
970 if (vif->bss_conf.enable_beacon)
971 ath9k_vif_iter_set_beacon(iter_data, vif);
972 break;
973 case NL80211_IFTYPE_WDS:
974 iter_data->nwds++;
975 break;
976 default:
977 break;
978 }
979 }
980
ath9k_update_bssid_mask(struct ath_softc * sc,struct ath_chanctx * ctx,struct ath9k_vif_iter_data * iter_data)981 static void ath9k_update_bssid_mask(struct ath_softc *sc,
982 struct ath_chanctx *ctx,
983 struct ath9k_vif_iter_data *iter_data)
984 {
985 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
986 struct ath_vif *avp;
987 int i;
988
989 if (!ath9k_is_chanctx_enabled())
990 return;
991
992 list_for_each_entry(avp, &ctx->vifs, list) {
993 if (ctx->nvifs_assigned != 1)
994 continue;
995
996 if (!iter_data->has_hw_macaddr)
997 continue;
998
999 ether_addr_copy(common->curbssid, avp->bssid);
1000
1001 /* perm_addr will be used as the p2p device address. */
1002 for (i = 0; i < ETH_ALEN; i++)
1003 iter_data->mask[i] &=
1004 ~(iter_data->hw_macaddr[i] ^
1005 sc->hw->wiphy->perm_addr[i]);
1006 }
1007 }
1008
1009 /* Called with sc->mutex held. */
ath9k_calculate_iter_data(struct ath_softc * sc,struct ath_chanctx * ctx,struct ath9k_vif_iter_data * iter_data)1010 void ath9k_calculate_iter_data(struct ath_softc *sc,
1011 struct ath_chanctx *ctx,
1012 struct ath9k_vif_iter_data *iter_data)
1013 {
1014 struct ath_vif *avp;
1015
1016 /*
1017 * The hardware will use primary station addr together with the
1018 * BSSID mask when matching addresses.
1019 */
1020 memset(iter_data, 0, sizeof(*iter_data));
1021 eth_broadcast_addr(iter_data->mask);
1022 iter_data->slottime = 9;
1023
1024 list_for_each_entry(avp, &ctx->vifs, list)
1025 ath9k_vif_iter(iter_data, avp->vif->addr, avp->vif);
1026
1027 ath9k_update_bssid_mask(sc, ctx, iter_data);
1028 }
1029
ath9k_set_assoc_state(struct ath_softc * sc,struct ieee80211_vif * vif,bool changed)1030 static void ath9k_set_assoc_state(struct ath_softc *sc,
1031 struct ieee80211_vif *vif, bool changed)
1032 {
1033 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1034 struct ath_vif *avp = (struct ath_vif *)vif->drv_priv;
1035 unsigned long flags;
1036
1037 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1038
1039 ether_addr_copy(common->curbssid, avp->bssid);
1040 common->curaid = avp->aid;
1041 ath9k_hw_write_associd(sc->sc_ah);
1042
1043 if (changed) {
1044 common->last_rssi = ATH_RSSI_DUMMY_MARKER;
1045 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1046
1047 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1048 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1049 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1050 }
1051
1052 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1053 ath9k_mci_update_wlan_channels(sc, false);
1054
1055 ath_dbg(common, CONFIG,
1056 "Primary Station interface: %pM, BSSID: %pM\n",
1057 vif->addr, common->curbssid);
1058 }
1059
1060 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
ath9k_set_offchannel_state(struct ath_softc * sc)1061 static void ath9k_set_offchannel_state(struct ath_softc *sc)
1062 {
1063 struct ath_hw *ah = sc->sc_ah;
1064 struct ath_common *common = ath9k_hw_common(ah);
1065 struct ieee80211_vif *vif = NULL;
1066
1067 ath9k_ps_wakeup(sc);
1068
1069 if (sc->offchannel.state < ATH_OFFCHANNEL_ROC_START)
1070 vif = sc->offchannel.scan_vif;
1071 else
1072 vif = sc->offchannel.roc_vif;
1073
1074 if (WARN_ON(!vif))
1075 goto exit;
1076
1077 eth_zero_addr(common->curbssid);
1078 eth_broadcast_addr(common->bssidmask);
1079 memcpy(common->macaddr, vif->addr, ETH_ALEN);
1080 common->curaid = 0;
1081 ah->opmode = vif->type;
1082 ah->imask &= ~ATH9K_INT_SWBA;
1083 ah->imask &= ~ATH9K_INT_TSFOOR;
1084 ah->slottime = 9;
1085
1086 ath_hw_setbssidmask(common);
1087 ath9k_hw_setopmode(ah);
1088 ath9k_hw_write_associd(sc->sc_ah);
1089 ath9k_hw_set_interrupts(ah);
1090 ath9k_hw_init_global_settings(ah);
1091
1092 exit:
1093 ath9k_ps_restore(sc);
1094 }
1095 #endif
1096
1097 /* Called with sc->mutex held. */
ath9k_calculate_summary_state(struct ath_softc * sc,struct ath_chanctx * ctx)1098 void ath9k_calculate_summary_state(struct ath_softc *sc,
1099 struct ath_chanctx *ctx)
1100 {
1101 struct ath_hw *ah = sc->sc_ah;
1102 struct ath_common *common = ath9k_hw_common(ah);
1103 struct ath9k_vif_iter_data iter_data;
1104
1105 ath_chanctx_check_active(sc, ctx);
1106
1107 if (ctx != sc->cur_chan)
1108 return;
1109
1110 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1111 if (ctx == &sc->offchannel.chan)
1112 return ath9k_set_offchannel_state(sc);
1113 #endif
1114
1115 ath9k_ps_wakeup(sc);
1116 ath9k_calculate_iter_data(sc, ctx, &iter_data);
1117
1118 if (iter_data.has_hw_macaddr)
1119 memcpy(common->macaddr, iter_data.hw_macaddr, ETH_ALEN);
1120
1121 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1122 ath_hw_setbssidmask(common);
1123
1124 if (iter_data.naps > 0) {
1125 ath9k_hw_set_tsfadjust(ah, true);
1126 ah->opmode = NL80211_IFTYPE_AP;
1127 } else {
1128 ath9k_hw_set_tsfadjust(ah, false);
1129 if (iter_data.beacons)
1130 ath9k_beacon_ensure_primary_slot(sc);
1131
1132 if (iter_data.nmeshes)
1133 ah->opmode = NL80211_IFTYPE_MESH_POINT;
1134 else if (iter_data.nocbs)
1135 ah->opmode = NL80211_IFTYPE_OCB;
1136 else if (iter_data.nwds)
1137 ah->opmode = NL80211_IFTYPE_AP;
1138 else if (iter_data.nadhocs)
1139 ah->opmode = NL80211_IFTYPE_ADHOC;
1140 else
1141 ah->opmode = NL80211_IFTYPE_STATION;
1142 }
1143
1144 ath9k_hw_setopmode(ah);
1145
1146 ctx->switch_after_beacon = false;
1147 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
1148 ah->imask |= ATH9K_INT_TSFOOR;
1149 else {
1150 ah->imask &= ~ATH9K_INT_TSFOOR;
1151 if (iter_data.naps == 1 && iter_data.beacons)
1152 ctx->switch_after_beacon = true;
1153 }
1154
1155 if (ah->opmode == NL80211_IFTYPE_STATION) {
1156 bool changed = (iter_data.primary_sta != ctx->primary_sta);
1157
1158 if (iter_data.primary_sta) {
1159 iter_data.primary_beacon_vif = iter_data.primary_sta;
1160 iter_data.beacons = true;
1161 ath9k_set_assoc_state(sc, iter_data.primary_sta,
1162 changed);
1163 ctx->primary_sta = iter_data.primary_sta;
1164 } else {
1165 ctx->primary_sta = NULL;
1166 eth_zero_addr(common->curbssid);
1167 common->curaid = 0;
1168 ath9k_hw_write_associd(sc->sc_ah);
1169 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1170 ath9k_mci_update_wlan_channels(sc, true);
1171 }
1172 }
1173 sc->nbcnvifs = iter_data.nbcnvifs;
1174 ath9k_beacon_config(sc, iter_data.primary_beacon_vif,
1175 iter_data.beacons);
1176 ath9k_hw_set_interrupts(ah);
1177
1178 if (ah->slottime != iter_data.slottime) {
1179 ah->slottime = iter_data.slottime;
1180 ath9k_hw_init_global_settings(ah);
1181 }
1182
1183 if (iter_data.primary_sta)
1184 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1185 else
1186 clear_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1187
1188 ath_dbg(common, CONFIG,
1189 "macaddr: %pM, bssid: %pM, bssidmask: %pM\n",
1190 common->macaddr, common->curbssid, common->bssidmask);
1191
1192 ath9k_ps_restore(sc);
1193 }
1194
ath9k_tpc_vif_iter(void * data,u8 * mac,struct ieee80211_vif * vif)1195 static void ath9k_tpc_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1196 {
1197 int *power = data;
1198
1199 if (*power < vif->bss_conf.txpower)
1200 *power = vif->bss_conf.txpower;
1201 }
1202
1203 /* Called with sc->mutex held. */
ath9k_set_txpower(struct ath_softc * sc,struct ieee80211_vif * vif)1204 void ath9k_set_txpower(struct ath_softc *sc, struct ieee80211_vif *vif)
1205 {
1206 int power;
1207 struct ath_hw *ah = sc->sc_ah;
1208 struct ath_regulatory *reg = ath9k_hw_regulatory(ah);
1209
1210 ath9k_ps_wakeup(sc);
1211 if (ah->tpc_enabled) {
1212 power = (vif) ? vif->bss_conf.txpower : -1;
1213 ieee80211_iterate_active_interfaces_atomic(
1214 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1215 ath9k_tpc_vif_iter, &power);
1216 if (power == -1)
1217 power = sc->hw->conf.power_level;
1218 } else {
1219 power = sc->hw->conf.power_level;
1220 }
1221 sc->cur_chan->txpower = 2 * power;
1222 ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
1223 sc->cur_chan->cur_txpower = reg->max_power_level;
1224 ath9k_ps_restore(sc);
1225 }
1226
ath9k_assign_hw_queues(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1227 static void ath9k_assign_hw_queues(struct ieee80211_hw *hw,
1228 struct ieee80211_vif *vif)
1229 {
1230 int i;
1231
1232 if (!ath9k_is_chanctx_enabled())
1233 return;
1234
1235 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1236 vif->hw_queue[i] = i;
1237
1238 if (vif->type == NL80211_IFTYPE_AP ||
1239 vif->type == NL80211_IFTYPE_MESH_POINT)
1240 vif->cab_queue = hw->queues - 2;
1241 else
1242 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1243 }
1244
ath9k_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1245 static int ath9k_add_interface(struct ieee80211_hw *hw,
1246 struct ieee80211_vif *vif)
1247 {
1248 struct ath_softc *sc = hw->priv;
1249 struct ath_hw *ah = sc->sc_ah;
1250 struct ath_common *common = ath9k_hw_common(ah);
1251 struct ath_vif *avp = (void *)vif->drv_priv;
1252 struct ath_node *an = &avp->mcast_node;
1253
1254 mutex_lock(&sc->mutex);
1255
1256 if (IS_ENABLED(CONFIG_ATH9K_TX99)) {
1257 if (sc->cur_chan->nvifs >= 1) {
1258 mutex_unlock(&sc->mutex);
1259 return -EOPNOTSUPP;
1260 }
1261 sc->tx99_vif = vif;
1262 }
1263
1264 ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1265 sc->cur_chan->nvifs++;
1266
1267 if (vif->type == NL80211_IFTYPE_STATION && ath9k_is_chanctx_enabled())
1268 vif->driver_flags |= IEEE80211_VIF_GET_NOA_UPDATE;
1269
1270 if (ath9k_uses_beacons(vif->type))
1271 ath9k_beacon_assign_slot(sc, vif);
1272
1273 avp->vif = vif;
1274 if (!ath9k_is_chanctx_enabled()) {
1275 avp->chanctx = sc->cur_chan;
1276 list_add_tail(&avp->list, &avp->chanctx->vifs);
1277 }
1278
1279 ath9k_calculate_summary_state(sc, avp->chanctx);
1280
1281 ath9k_assign_hw_queues(hw, vif);
1282
1283 ath9k_set_txpower(sc, vif);
1284
1285 an->sc = sc;
1286 an->sta = NULL;
1287 an->vif = vif;
1288 an->no_ps_filter = true;
1289 ath_tx_node_init(sc, an);
1290
1291 mutex_unlock(&sc->mutex);
1292 return 0;
1293 }
1294
ath9k_change_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_iftype new_type,bool p2p)1295 static int ath9k_change_interface(struct ieee80211_hw *hw,
1296 struct ieee80211_vif *vif,
1297 enum nl80211_iftype new_type,
1298 bool p2p)
1299 {
1300 struct ath_softc *sc = hw->priv;
1301 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1302 struct ath_vif *avp = (void *)vif->drv_priv;
1303
1304 mutex_lock(&sc->mutex);
1305
1306 if (IS_ENABLED(CONFIG_ATH9K_TX99)) {
1307 mutex_unlock(&sc->mutex);
1308 return -EOPNOTSUPP;
1309 }
1310
1311 ath_dbg(common, CONFIG, "Change Interface\n");
1312
1313 if (ath9k_uses_beacons(vif->type))
1314 ath9k_beacon_remove_slot(sc, vif);
1315
1316 vif->type = new_type;
1317 vif->p2p = p2p;
1318
1319 if (ath9k_uses_beacons(vif->type))
1320 ath9k_beacon_assign_slot(sc, vif);
1321
1322 ath9k_assign_hw_queues(hw, vif);
1323 ath9k_calculate_summary_state(sc, avp->chanctx);
1324
1325 ath9k_set_txpower(sc, vif);
1326
1327 mutex_unlock(&sc->mutex);
1328 return 0;
1329 }
1330
ath9k_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1331 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1332 struct ieee80211_vif *vif)
1333 {
1334 struct ath_softc *sc = hw->priv;
1335 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1336 struct ath_vif *avp = (void *)vif->drv_priv;
1337
1338 ath_dbg(common, CONFIG, "Detach Interface\n");
1339
1340 mutex_lock(&sc->mutex);
1341
1342 ath9k_p2p_remove_vif(sc, vif);
1343
1344 sc->cur_chan->nvifs--;
1345 sc->tx99_vif = NULL;
1346 if (!ath9k_is_chanctx_enabled())
1347 list_del(&avp->list);
1348
1349 if (ath9k_uses_beacons(vif->type))
1350 ath9k_beacon_remove_slot(sc, vif);
1351
1352 ath_tx_node_cleanup(sc, &avp->mcast_node);
1353
1354 ath9k_calculate_summary_state(sc, avp->chanctx);
1355
1356 ath9k_set_txpower(sc, NULL);
1357
1358 mutex_unlock(&sc->mutex);
1359 }
1360
ath9k_enable_ps(struct ath_softc * sc)1361 static void ath9k_enable_ps(struct ath_softc *sc)
1362 {
1363 struct ath_hw *ah = sc->sc_ah;
1364 struct ath_common *common = ath9k_hw_common(ah);
1365
1366 if (IS_ENABLED(CONFIG_ATH9K_TX99))
1367 return;
1368
1369 sc->ps_enabled = true;
1370 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1371 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1372 ah->imask |= ATH9K_INT_TIM_TIMER;
1373 ath9k_hw_set_interrupts(ah);
1374 }
1375 ath9k_hw_setrxabort(ah, 1);
1376 }
1377 ath_dbg(common, PS, "PowerSave enabled\n");
1378 }
1379
ath9k_disable_ps(struct ath_softc * sc)1380 static void ath9k_disable_ps(struct ath_softc *sc)
1381 {
1382 struct ath_hw *ah = sc->sc_ah;
1383 struct ath_common *common = ath9k_hw_common(ah);
1384
1385 if (IS_ENABLED(CONFIG_ATH9K_TX99))
1386 return;
1387
1388 sc->ps_enabled = false;
1389 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1390 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1391 ath9k_hw_setrxabort(ah, 0);
1392 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1393 PS_WAIT_FOR_CAB |
1394 PS_WAIT_FOR_PSPOLL_DATA |
1395 PS_WAIT_FOR_TX_ACK);
1396 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1397 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1398 ath9k_hw_set_interrupts(ah);
1399 }
1400 }
1401 ath_dbg(common, PS, "PowerSave disabled\n");
1402 }
1403
ath9k_config(struct ieee80211_hw * hw,u32 changed)1404 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1405 {
1406 struct ath_softc *sc = hw->priv;
1407 struct ath_hw *ah = sc->sc_ah;
1408 struct ath_common *common = ath9k_hw_common(ah);
1409 struct ieee80211_conf *conf = &hw->conf;
1410 struct ath_chanctx *ctx = sc->cur_chan;
1411
1412 ath9k_ps_wakeup(sc);
1413 mutex_lock(&sc->mutex);
1414
1415 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1416 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1417 if (sc->ps_idle) {
1418 ath_cancel_work(sc);
1419 ath9k_stop_btcoex(sc);
1420 } else {
1421 ath9k_start_btcoex(sc);
1422 /*
1423 * The chip needs a reset to properly wake up from
1424 * full sleep
1425 */
1426 ath_chanctx_set_channel(sc, ctx, &ctx->chandef);
1427 }
1428 }
1429
1430 /*
1431 * We just prepare to enable PS. We have to wait until our AP has
1432 * ACK'd our null data frame to disable RX otherwise we'll ignore
1433 * those ACKs and end up retransmitting the same null data frames.
1434 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1435 */
1436 if (changed & IEEE80211_CONF_CHANGE_PS) {
1437 unsigned long flags;
1438 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1439 if (conf->flags & IEEE80211_CONF_PS)
1440 ath9k_enable_ps(sc);
1441 else
1442 ath9k_disable_ps(sc);
1443 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1444 }
1445
1446 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1447 if (conf->flags & IEEE80211_CONF_MONITOR) {
1448 ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1449 sc->sc_ah->is_monitoring = true;
1450 } else {
1451 ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1452 sc->sc_ah->is_monitoring = false;
1453 }
1454 }
1455
1456 if (!ath9k_is_chanctx_enabled() && (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
1457 ctx->offchannel = !!(conf->flags & IEEE80211_CONF_OFFCHANNEL);
1458 ath_chanctx_set_channel(sc, ctx, &hw->conf.chandef);
1459 }
1460
1461 mutex_unlock(&sc->mutex);
1462 ath9k_ps_restore(sc);
1463
1464 return 0;
1465 }
1466
1467 #define SUPPORTED_FILTERS \
1468 (FIF_ALLMULTI | \
1469 FIF_CONTROL | \
1470 FIF_PSPOLL | \
1471 FIF_OTHER_BSS | \
1472 FIF_BCN_PRBRESP_PROMISC | \
1473 FIF_PROBE_REQ | \
1474 FIF_FCSFAIL)
1475
1476 /* FIXME: sc->sc_full_reset ? */
ath9k_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)1477 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1478 unsigned int changed_flags,
1479 unsigned int *total_flags,
1480 u64 multicast)
1481 {
1482 struct ath_softc *sc = hw->priv;
1483 struct ath_chanctx *ctx;
1484 u32 rfilt;
1485
1486 changed_flags &= SUPPORTED_FILTERS;
1487 *total_flags &= SUPPORTED_FILTERS;
1488
1489 spin_lock_bh(&sc->chan_lock);
1490 ath_for_each_chanctx(sc, ctx)
1491 ctx->rxfilter = *total_flags;
1492 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
1493 sc->offchannel.chan.rxfilter = *total_flags;
1494 #endif
1495 spin_unlock_bh(&sc->chan_lock);
1496
1497 ath9k_ps_wakeup(sc);
1498 rfilt = ath_calcrxfilter(sc);
1499 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1500 ath9k_ps_restore(sc);
1501
1502 ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1503 rfilt);
1504 }
1505
ath9k_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1506 static int ath9k_sta_add(struct ieee80211_hw *hw,
1507 struct ieee80211_vif *vif,
1508 struct ieee80211_sta *sta)
1509 {
1510 struct ath_softc *sc = hw->priv;
1511 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1512 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1513 struct ieee80211_key_conf ps_key = { };
1514 int key;
1515
1516 ath_node_attach(sc, sta, vif);
1517
1518 if (vif->type != NL80211_IFTYPE_AP &&
1519 vif->type != NL80211_IFTYPE_AP_VLAN)
1520 return 0;
1521
1522 key = ath_key_config(common, vif, sta, &ps_key);
1523 if (key > 0) {
1524 an->ps_key = key;
1525 an->key_idx[0] = key;
1526 }
1527
1528 return 0;
1529 }
1530
ath9k_del_ps_key(struct ath_softc * sc,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1531 static void ath9k_del_ps_key(struct ath_softc *sc,
1532 struct ieee80211_vif *vif,
1533 struct ieee80211_sta *sta)
1534 {
1535 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1536 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1537 struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1538
1539 if (!an->ps_key)
1540 return;
1541
1542 ath_key_delete(common, &ps_key);
1543 an->ps_key = 0;
1544 an->key_idx[0] = 0;
1545 }
1546
ath9k_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1547 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1548 struct ieee80211_vif *vif,
1549 struct ieee80211_sta *sta)
1550 {
1551 struct ath_softc *sc = hw->priv;
1552
1553 ath9k_del_ps_key(sc, vif, sta);
1554 ath_node_detach(sc, sta);
1555
1556 return 0;
1557 }
1558
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)1559 static int ath9k_sta_state(struct ieee80211_hw *hw,
1560 struct ieee80211_vif *vif,
1561 struct ieee80211_sta *sta,
1562 enum ieee80211_sta_state old_state,
1563 enum ieee80211_sta_state new_state)
1564 {
1565 struct ath_softc *sc = hw->priv;
1566 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1567 int ret = 0;
1568
1569 if (old_state == IEEE80211_STA_NOTEXIST &&
1570 new_state == IEEE80211_STA_NONE) {
1571 ret = ath9k_sta_add(hw, vif, sta);
1572 ath_dbg(common, CONFIG,
1573 "Add station: %pM\n", sta->addr);
1574 } else if (old_state == IEEE80211_STA_NONE &&
1575 new_state == IEEE80211_STA_NOTEXIST) {
1576 ret = ath9k_sta_remove(hw, vif, sta);
1577 ath_dbg(common, CONFIG,
1578 "Remove station: %pM\n", sta->addr);
1579 }
1580
1581 if (ath9k_is_chanctx_enabled()) {
1582 if (vif->type == NL80211_IFTYPE_STATION) {
1583 if (old_state == IEEE80211_STA_ASSOC &&
1584 new_state == IEEE80211_STA_AUTHORIZED)
1585 ath_chanctx_event(sc, vif,
1586 ATH_CHANCTX_EVENT_AUTHORIZED);
1587 }
1588 }
1589
1590 return ret;
1591 }
1592
ath9k_sta_set_tx_filter(struct ath_hw * ah,struct ath_node * an,bool set)1593 static void ath9k_sta_set_tx_filter(struct ath_hw *ah,
1594 struct ath_node *an,
1595 bool set)
1596 {
1597 int i;
1598
1599 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1600 if (!an->key_idx[i])
1601 continue;
1602 ath9k_hw_set_tx_filter(ah, an->key_idx[i], set);
1603 }
1604 }
1605
ath9k_sta_notify(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum sta_notify_cmd cmd,struct ieee80211_sta * sta)1606 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1607 struct ieee80211_vif *vif,
1608 enum sta_notify_cmd cmd,
1609 struct ieee80211_sta *sta)
1610 {
1611 struct ath_softc *sc = hw->priv;
1612 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1613
1614 switch (cmd) {
1615 case STA_NOTIFY_SLEEP:
1616 an->sleeping = true;
1617 ath_tx_aggr_sleep(sta, sc, an);
1618 ath9k_sta_set_tx_filter(sc->sc_ah, an, true);
1619 break;
1620 case STA_NOTIFY_AWAKE:
1621 ath9k_sta_set_tx_filter(sc->sc_ah, an, false);
1622 an->sleeping = false;
1623 ath_tx_aggr_wakeup(sc, an);
1624 break;
1625 }
1626 }
1627
ath9k_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)1628 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1629 struct ieee80211_vif *vif, u16 queue,
1630 const struct ieee80211_tx_queue_params *params)
1631 {
1632 struct ath_softc *sc = hw->priv;
1633 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1634 struct ath_txq *txq;
1635 struct ath9k_tx_queue_info qi;
1636 int ret = 0;
1637
1638 if (queue >= IEEE80211_NUM_ACS)
1639 return 0;
1640
1641 txq = sc->tx.txq_map[queue];
1642
1643 ath9k_ps_wakeup(sc);
1644 mutex_lock(&sc->mutex);
1645
1646 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1647
1648 qi.tqi_aifs = params->aifs;
1649 qi.tqi_cwmin = params->cw_min;
1650 qi.tqi_cwmax = params->cw_max;
1651 qi.tqi_burstTime = params->txop * 32;
1652
1653 ath_dbg(common, CONFIG,
1654 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1655 queue, txq->axq_qnum, params->aifs, params->cw_min,
1656 params->cw_max, params->txop);
1657
1658 ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1659 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1660 if (ret)
1661 ath_err(common, "TXQ Update failed\n");
1662
1663 mutex_unlock(&sc->mutex);
1664 ath9k_ps_restore(sc);
1665
1666 return ret;
1667 }
1668
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)1669 static int ath9k_set_key(struct ieee80211_hw *hw,
1670 enum set_key_cmd cmd,
1671 struct ieee80211_vif *vif,
1672 struct ieee80211_sta *sta,
1673 struct ieee80211_key_conf *key)
1674 {
1675 struct ath_softc *sc = hw->priv;
1676 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1677 struct ath_node *an = NULL;
1678 int ret = 0, i;
1679
1680 if (ath9k_modparam_nohwcrypt)
1681 return -ENOSPC;
1682
1683 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1684 vif->type == NL80211_IFTYPE_MESH_POINT) &&
1685 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1686 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1687 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1688 /*
1689 * For now, disable hw crypto for the RSN IBSS group keys. This
1690 * could be optimized in the future to use a modified key cache
1691 * design to support per-STA RX GTK, but until that gets
1692 * implemented, use of software crypto for group addressed
1693 * frames is a acceptable to allow RSN IBSS to be used.
1694 */
1695 return -EOPNOTSUPP;
1696 }
1697
1698 mutex_lock(&sc->mutex);
1699 ath9k_ps_wakeup(sc);
1700 ath_dbg(common, CONFIG, "Set HW Key %d\n", cmd);
1701 if (sta)
1702 an = (struct ath_node *)sta->drv_priv;
1703
1704 switch (cmd) {
1705 case SET_KEY:
1706 if (sta)
1707 ath9k_del_ps_key(sc, vif, sta);
1708
1709 key->hw_key_idx = 0;
1710 ret = ath_key_config(common, vif, sta, key);
1711 if (ret >= 0) {
1712 key->hw_key_idx = ret;
1713 /* push IV and Michael MIC generation to stack */
1714 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1715 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1716 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1717 if (sc->sc_ah->sw_mgmt_crypto_tx &&
1718 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1719 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1720 ret = 0;
1721 }
1722 if (an && key->hw_key_idx) {
1723 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1724 if (an->key_idx[i])
1725 continue;
1726 an->key_idx[i] = key->hw_key_idx;
1727 break;
1728 }
1729 WARN_ON(i == ARRAY_SIZE(an->key_idx));
1730 }
1731 break;
1732 case DISABLE_KEY:
1733 ath_key_delete(common, key);
1734 if (an) {
1735 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1736 if (an->key_idx[i] != key->hw_key_idx)
1737 continue;
1738 an->key_idx[i] = 0;
1739 break;
1740 }
1741 }
1742 key->hw_key_idx = 0;
1743 break;
1744 default:
1745 ret = -EINVAL;
1746 }
1747
1748 ath9k_ps_restore(sc);
1749 mutex_unlock(&sc->mutex);
1750
1751 return ret;
1752 }
1753
ath9k_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u32 changed)1754 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1755 struct ieee80211_vif *vif,
1756 struct ieee80211_bss_conf *bss_conf,
1757 u32 changed)
1758 {
1759 #define CHECK_ANI \
1760 (BSS_CHANGED_ASSOC | \
1761 BSS_CHANGED_IBSS | \
1762 BSS_CHANGED_BEACON_ENABLED)
1763
1764 struct ath_softc *sc = hw->priv;
1765 struct ath_hw *ah = sc->sc_ah;
1766 struct ath_common *common = ath9k_hw_common(ah);
1767 struct ath_vif *avp = (void *)vif->drv_priv;
1768 int slottime;
1769
1770 ath9k_ps_wakeup(sc);
1771 mutex_lock(&sc->mutex);
1772
1773 if (changed & BSS_CHANGED_ASSOC) {
1774 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
1775 bss_conf->bssid, bss_conf->assoc);
1776
1777 memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
1778 avp->aid = bss_conf->aid;
1779 avp->assoc = bss_conf->assoc;
1780
1781 ath9k_calculate_summary_state(sc, avp->chanctx);
1782 }
1783
1784 if ((changed & BSS_CHANGED_IBSS) ||
1785 (changed & BSS_CHANGED_OCB)) {
1786 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1787 common->curaid = bss_conf->aid;
1788 ath9k_hw_write_associd(sc->sc_ah);
1789 }
1790
1791 if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
1792 (changed & BSS_CHANGED_BEACON_INT) ||
1793 (changed & BSS_CHANGED_BEACON_INFO)) {
1794 ath9k_calculate_summary_state(sc, avp->chanctx);
1795 }
1796
1797 if ((avp->chanctx == sc->cur_chan) &&
1798 (changed & BSS_CHANGED_ERP_SLOT)) {
1799 if (bss_conf->use_short_slot)
1800 slottime = 9;
1801 else
1802 slottime = 20;
1803
1804 if (vif->type == NL80211_IFTYPE_AP) {
1805 /*
1806 * Defer update, so that connected stations can adjust
1807 * their settings at the same time.
1808 * See beacon.c for more details
1809 */
1810 sc->beacon.slottime = slottime;
1811 sc->beacon.updateslot = UPDATE;
1812 } else {
1813 ah->slottime = slottime;
1814 ath9k_hw_init_global_settings(ah);
1815 }
1816 }
1817
1818 if (changed & BSS_CHANGED_P2P_PS)
1819 ath9k_p2p_bss_info_changed(sc, vif);
1820
1821 if (changed & CHECK_ANI)
1822 ath_check_ani(sc);
1823
1824 if (changed & BSS_CHANGED_TXPOWER) {
1825 ath_dbg(common, CONFIG, "vif %pM power %d dbm power_type %d\n",
1826 vif->addr, bss_conf->txpower, bss_conf->txpower_type);
1827 ath9k_set_txpower(sc, vif);
1828 }
1829
1830 mutex_unlock(&sc->mutex);
1831 ath9k_ps_restore(sc);
1832
1833 #undef CHECK_ANI
1834 }
1835
ath9k_get_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1836 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1837 {
1838 struct ath_softc *sc = hw->priv;
1839 struct ath_vif *avp = (void *)vif->drv_priv;
1840 u64 tsf;
1841
1842 mutex_lock(&sc->mutex);
1843 ath9k_ps_wakeup(sc);
1844 /* Get current TSF either from HW or kernel time. */
1845 if (sc->cur_chan == avp->chanctx) {
1846 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1847 } else {
1848 tsf = sc->cur_chan->tsf_val +
1849 ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, NULL);
1850 }
1851 tsf += le64_to_cpu(avp->tsf_adjust);
1852 ath9k_ps_restore(sc);
1853 mutex_unlock(&sc->mutex);
1854
1855 return tsf;
1856 }
1857
ath9k_set_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u64 tsf)1858 static void ath9k_set_tsf(struct ieee80211_hw *hw,
1859 struct ieee80211_vif *vif,
1860 u64 tsf)
1861 {
1862 struct ath_softc *sc = hw->priv;
1863 struct ath_vif *avp = (void *)vif->drv_priv;
1864
1865 mutex_lock(&sc->mutex);
1866 ath9k_ps_wakeup(sc);
1867 tsf -= le64_to_cpu(avp->tsf_adjust);
1868 ktime_get_raw_ts64(&avp->chanctx->tsf_ts);
1869 if (sc->cur_chan == avp->chanctx)
1870 ath9k_hw_settsf64(sc->sc_ah, tsf);
1871 avp->chanctx->tsf_val = tsf;
1872 ath9k_ps_restore(sc);
1873 mutex_unlock(&sc->mutex);
1874 }
1875
ath9k_reset_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1876 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1877 {
1878 struct ath_softc *sc = hw->priv;
1879 struct ath_vif *avp = (void *)vif->drv_priv;
1880
1881 mutex_lock(&sc->mutex);
1882
1883 ath9k_ps_wakeup(sc);
1884 ktime_get_raw_ts64(&avp->chanctx->tsf_ts);
1885 if (sc->cur_chan == avp->chanctx)
1886 ath9k_hw_reset_tsf(sc->sc_ah);
1887 avp->chanctx->tsf_val = 0;
1888 ath9k_ps_restore(sc);
1889
1890 mutex_unlock(&sc->mutex);
1891 }
1892
ath9k_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)1893 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1894 struct ieee80211_vif *vif,
1895 struct ieee80211_ampdu_params *params)
1896 {
1897 struct ath_softc *sc = hw->priv;
1898 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1899 bool flush = false;
1900 int ret = 0;
1901 struct ieee80211_sta *sta = params->sta;
1902 struct ath_node *an = (struct ath_node *)sta->drv_priv;
1903 enum ieee80211_ampdu_mlme_action action = params->action;
1904 u16 tid = params->tid;
1905 u16 *ssn = ¶ms->ssn;
1906 struct ath_atx_tid *atid;
1907
1908 mutex_lock(&sc->mutex);
1909
1910 switch (action) {
1911 case IEEE80211_AMPDU_RX_START:
1912 break;
1913 case IEEE80211_AMPDU_RX_STOP:
1914 break;
1915 case IEEE80211_AMPDU_TX_START:
1916 if (ath9k_is_chanctx_enabled()) {
1917 if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
1918 ret = -EBUSY;
1919 break;
1920 }
1921 }
1922 ath9k_ps_wakeup(sc);
1923 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1924 if (!ret)
1925 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1926 ath9k_ps_restore(sc);
1927 break;
1928 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1929 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1930 flush = true;
1931 /* fall through */
1932 case IEEE80211_AMPDU_TX_STOP_CONT:
1933 ath9k_ps_wakeup(sc);
1934 ath_tx_aggr_stop(sc, sta, tid);
1935 if (!flush)
1936 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1937 ath9k_ps_restore(sc);
1938 break;
1939 case IEEE80211_AMPDU_TX_OPERATIONAL:
1940 atid = ath_node_to_tid(an, tid);
1941 atid->baw_size = IEEE80211_MIN_AMPDU_BUF <<
1942 sta->ht_cap.ampdu_factor;
1943 break;
1944 default:
1945 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
1946 }
1947
1948 mutex_unlock(&sc->mutex);
1949
1950 return ret;
1951 }
1952
ath9k_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)1953 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
1954 struct survey_info *survey)
1955 {
1956 struct ath_softc *sc = hw->priv;
1957 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1958 struct ieee80211_supported_band *sband;
1959 struct ieee80211_channel *chan;
1960 unsigned long flags;
1961 int pos;
1962
1963 if (IS_ENABLED(CONFIG_ATH9K_TX99))
1964 return -EOPNOTSUPP;
1965
1966 spin_lock_irqsave(&common->cc_lock, flags);
1967 if (idx == 0)
1968 ath_update_survey_stats(sc);
1969
1970 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
1971 if (sband && idx >= sband->n_channels) {
1972 idx -= sband->n_channels;
1973 sband = NULL;
1974 }
1975
1976 if (!sband)
1977 sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
1978
1979 if (!sband || idx >= sband->n_channels) {
1980 spin_unlock_irqrestore(&common->cc_lock, flags);
1981 return -ENOENT;
1982 }
1983
1984 chan = &sband->channels[idx];
1985 pos = chan->hw_value;
1986 memcpy(survey, &sc->survey[pos], sizeof(*survey));
1987 survey->channel = chan;
1988 spin_unlock_irqrestore(&common->cc_lock, flags);
1989
1990 return 0;
1991 }
1992
ath9k_enable_dynack(struct ath_softc * sc)1993 static void ath9k_enable_dynack(struct ath_softc *sc)
1994 {
1995 #ifdef CONFIG_ATH9K_DYNACK
1996 u32 rfilt;
1997 struct ath_hw *ah = sc->sc_ah;
1998
1999 ath_dynack_reset(ah);
2000
2001 ah->dynack.enabled = true;
2002 rfilt = ath_calcrxfilter(sc);
2003 ath9k_hw_setrxfilter(ah, rfilt);
2004 #endif
2005 }
2006
ath9k_set_coverage_class(struct ieee80211_hw * hw,s16 coverage_class)2007 static void ath9k_set_coverage_class(struct ieee80211_hw *hw,
2008 s16 coverage_class)
2009 {
2010 struct ath_softc *sc = hw->priv;
2011 struct ath_hw *ah = sc->sc_ah;
2012
2013 if (IS_ENABLED(CONFIG_ATH9K_TX99))
2014 return;
2015
2016 mutex_lock(&sc->mutex);
2017
2018 if (coverage_class >= 0) {
2019 ah->coverage_class = coverage_class;
2020 if (ah->dynack.enabled) {
2021 u32 rfilt;
2022
2023 ah->dynack.enabled = false;
2024 rfilt = ath_calcrxfilter(sc);
2025 ath9k_hw_setrxfilter(ah, rfilt);
2026 }
2027 ath9k_ps_wakeup(sc);
2028 ath9k_hw_init_global_settings(ah);
2029 ath9k_ps_restore(sc);
2030 } else if (!ah->dynack.enabled) {
2031 ath9k_enable_dynack(sc);
2032 }
2033
2034 mutex_unlock(&sc->mutex);
2035 }
2036
ath9k_has_tx_pending(struct ath_softc * sc,bool sw_pending)2037 static bool ath9k_has_tx_pending(struct ath_softc *sc,
2038 bool sw_pending)
2039 {
2040 int i, npend = 0;
2041
2042 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2043 if (!ATH_TXQ_SETUP(sc, i))
2044 continue;
2045
2046 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i],
2047 sw_pending);
2048 if (npend)
2049 break;
2050 }
2051
2052 return !!npend;
2053 }
2054
ath9k_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)2055 static void ath9k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2056 u32 queues, bool drop)
2057 {
2058 struct ath_softc *sc = hw->priv;
2059 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2060
2061 if (ath9k_is_chanctx_enabled()) {
2062 if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
2063 goto flush;
2064
2065 /*
2066 * If MCC is active, extend the flush timeout
2067 * and wait for the HW/SW queues to become
2068 * empty. This needs to be done outside the
2069 * sc->mutex lock to allow the channel scheduler
2070 * to switch channel contexts.
2071 *
2072 * The vif queues have been stopped in mac80211,
2073 * so there won't be any incoming frames.
2074 */
2075 __ath9k_flush(hw, queues, drop, true, true);
2076 return;
2077 }
2078 flush:
2079 mutex_lock(&sc->mutex);
2080 __ath9k_flush(hw, queues, drop, true, false);
2081 mutex_unlock(&sc->mutex);
2082 }
2083
__ath9k_flush(struct ieee80211_hw * hw,u32 queues,bool drop,bool sw_pending,bool timeout_override)2084 void __ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop,
2085 bool sw_pending, bool timeout_override)
2086 {
2087 struct ath_softc *sc = hw->priv;
2088 struct ath_hw *ah = sc->sc_ah;
2089 struct ath_common *common = ath9k_hw_common(ah);
2090 int timeout;
2091 bool drain_txq;
2092
2093 cancel_delayed_work_sync(&sc->hw_check_work);
2094
2095 if (ah->ah_flags & AH_UNPLUGGED) {
2096 ath_dbg(common, ANY, "Device has been unplugged!\n");
2097 return;
2098 }
2099
2100 if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
2101 ath_dbg(common, ANY, "Device not present\n");
2102 return;
2103 }
2104
2105 spin_lock_bh(&sc->chan_lock);
2106 if (timeout_override)
2107 timeout = HZ / 5;
2108 else
2109 timeout = sc->cur_chan->flush_timeout;
2110 spin_unlock_bh(&sc->chan_lock);
2111
2112 ath_dbg(common, CHAN_CTX,
2113 "Flush timeout: %d\n", jiffies_to_msecs(timeout));
2114
2115 if (wait_event_timeout(sc->tx_wait, !ath9k_has_tx_pending(sc, sw_pending),
2116 timeout) > 0)
2117 drop = false;
2118
2119 if (drop) {
2120 ath9k_ps_wakeup(sc);
2121 spin_lock_bh(&sc->sc_pcu_lock);
2122 drain_txq = ath_drain_all_txq(sc);
2123 spin_unlock_bh(&sc->sc_pcu_lock);
2124
2125 if (!drain_txq)
2126 ath_reset(sc, NULL);
2127
2128 ath9k_ps_restore(sc);
2129 }
2130
2131 ieee80211_queue_delayed_work(hw, &sc->hw_check_work,
2132 ATH_HW_CHECK_POLL_INT);
2133 }
2134
ath9k_tx_frames_pending(struct ieee80211_hw * hw)2135 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2136 {
2137 struct ath_softc *sc = hw->priv;
2138
2139 return ath9k_has_tx_pending(sc, true);
2140 }
2141
ath9k_tx_last_beacon(struct ieee80211_hw * hw)2142 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2143 {
2144 struct ath_softc *sc = hw->priv;
2145 struct ath_hw *ah = sc->sc_ah;
2146 struct ieee80211_vif *vif;
2147 struct ath_vif *avp;
2148 struct ath_buf *bf;
2149 struct ath_tx_status ts;
2150 bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2151 int status;
2152
2153 vif = sc->beacon.bslot[0];
2154 if (!vif)
2155 return 0;
2156
2157 if (!vif->bss_conf.enable_beacon)
2158 return 0;
2159
2160 avp = (void *)vif->drv_priv;
2161
2162 if (!sc->beacon.tx_processed && !edma) {
2163 tasklet_disable(&sc->bcon_tasklet);
2164
2165 bf = avp->av_bcbuf;
2166 if (!bf || !bf->bf_mpdu)
2167 goto skip;
2168
2169 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2170 if (status == -EINPROGRESS)
2171 goto skip;
2172
2173 sc->beacon.tx_processed = true;
2174 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2175
2176 skip:
2177 tasklet_enable(&sc->bcon_tasklet);
2178 }
2179
2180 return sc->beacon.tx_last;
2181 }
2182
ath9k_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)2183 static int ath9k_get_stats(struct ieee80211_hw *hw,
2184 struct ieee80211_low_level_stats *stats)
2185 {
2186 struct ath_softc *sc = hw->priv;
2187 struct ath_hw *ah = sc->sc_ah;
2188 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2189
2190 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2191 stats->dot11RTSFailureCount = mib_stats->rts_bad;
2192 stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2193 stats->dot11RTSSuccessCount = mib_stats->rts_good;
2194 return 0;
2195 }
2196
fill_chainmask(u32 cap,u32 new)2197 static u32 fill_chainmask(u32 cap, u32 new)
2198 {
2199 u32 filled = 0;
2200 int i;
2201
2202 for (i = 0; cap && new; i++, cap >>= 1) {
2203 if (!(cap & BIT(0)))
2204 continue;
2205
2206 if (new & BIT(0))
2207 filled |= BIT(i);
2208
2209 new >>= 1;
2210 }
2211
2212 return filled;
2213 }
2214
validate_antenna_mask(struct ath_hw * ah,u32 val)2215 static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
2216 {
2217 if (AR_SREV_9300_20_OR_LATER(ah))
2218 return true;
2219
2220 switch (val & 0x7) {
2221 case 0x1:
2222 case 0x3:
2223 case 0x7:
2224 return true;
2225 case 0x2:
2226 return (ah->caps.rx_chainmask == 1);
2227 default:
2228 return false;
2229 }
2230 }
2231
ath9k_set_antenna(struct ieee80211_hw * hw,u32 tx_ant,u32 rx_ant)2232 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2233 {
2234 struct ath_softc *sc = hw->priv;
2235 struct ath_hw *ah = sc->sc_ah;
2236
2237 if (ah->caps.rx_chainmask != 1)
2238 rx_ant |= tx_ant;
2239
2240 if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
2241 return -EINVAL;
2242
2243 sc->ant_rx = rx_ant;
2244 sc->ant_tx = tx_ant;
2245
2246 if (ah->caps.rx_chainmask == 1)
2247 return 0;
2248
2249 /* AR9100 runs into calibration issues if not all rx chains are enabled */
2250 if (AR_SREV_9100(ah))
2251 ah->rxchainmask = 0x7;
2252 else
2253 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2254
2255 ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2256 ath9k_cmn_reload_chainmask(ah);
2257
2258 return 0;
2259 }
2260
ath9k_get_antenna(struct ieee80211_hw * hw,u32 * tx_ant,u32 * rx_ant)2261 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2262 {
2263 struct ath_softc *sc = hw->priv;
2264
2265 *tx_ant = sc->ant_tx;
2266 *rx_ant = sc->ant_rx;
2267 return 0;
2268 }
2269
ath9k_sw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)2270 static void ath9k_sw_scan_start(struct ieee80211_hw *hw,
2271 struct ieee80211_vif *vif,
2272 const u8 *mac_addr)
2273 {
2274 struct ath_softc *sc = hw->priv;
2275 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2276 set_bit(ATH_OP_SCANNING, &common->op_flags);
2277 }
2278
ath9k_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)2279 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw,
2280 struct ieee80211_vif *vif)
2281 {
2282 struct ath_softc *sc = hw->priv;
2283 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2284 clear_bit(ATH_OP_SCANNING, &common->op_flags);
2285 }
2286
2287 #ifdef CONFIG_ATH9K_CHANNEL_CONTEXT
2288
ath9k_cancel_pending_offchannel(struct ath_softc * sc)2289 static void ath9k_cancel_pending_offchannel(struct ath_softc *sc)
2290 {
2291 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2292
2293 if (sc->offchannel.roc_vif) {
2294 ath_dbg(common, CHAN_CTX,
2295 "%s: Aborting RoC\n", __func__);
2296
2297 del_timer_sync(&sc->offchannel.timer);
2298 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
2299 ath_roc_complete(sc, ATH_ROC_COMPLETE_ABORT);
2300 }
2301
2302 if (test_bit(ATH_OP_SCANNING, &common->op_flags)) {
2303 ath_dbg(common, CHAN_CTX,
2304 "%s: Aborting HW scan\n", __func__);
2305
2306 del_timer_sync(&sc->offchannel.timer);
2307 ath_scan_complete(sc, true);
2308 }
2309 }
2310
ath9k_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)2311 static int ath9k_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2312 struct ieee80211_scan_request *hw_req)
2313 {
2314 struct cfg80211_scan_request *req = &hw_req->req;
2315 struct ath_softc *sc = hw->priv;
2316 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2317 int ret = 0;
2318
2319 mutex_lock(&sc->mutex);
2320
2321 if (WARN_ON(sc->offchannel.scan_req)) {
2322 ret = -EBUSY;
2323 goto out;
2324 }
2325
2326 ath9k_ps_wakeup(sc);
2327 set_bit(ATH_OP_SCANNING, &common->op_flags);
2328 sc->offchannel.scan_vif = vif;
2329 sc->offchannel.scan_req = req;
2330 sc->offchannel.scan_idx = 0;
2331
2332 ath_dbg(common, CHAN_CTX, "HW scan request received on vif: %pM\n",
2333 vif->addr);
2334
2335 if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2336 ath_dbg(common, CHAN_CTX, "Starting HW scan\n");
2337 ath_offchannel_next(sc);
2338 }
2339
2340 out:
2341 mutex_unlock(&sc->mutex);
2342
2343 return ret;
2344 }
2345
ath9k_cancel_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif)2346 static void ath9k_cancel_hw_scan(struct ieee80211_hw *hw,
2347 struct ieee80211_vif *vif)
2348 {
2349 struct ath_softc *sc = hw->priv;
2350 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2351
2352 ath_dbg(common, CHAN_CTX, "Cancel HW scan on vif: %pM\n", vif->addr);
2353
2354 mutex_lock(&sc->mutex);
2355 del_timer_sync(&sc->offchannel.timer);
2356 ath_scan_complete(sc, true);
2357 mutex_unlock(&sc->mutex);
2358 }
2359
ath9k_remain_on_channel(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_channel * chan,int duration,enum ieee80211_roc_type type)2360 static int ath9k_remain_on_channel(struct ieee80211_hw *hw,
2361 struct ieee80211_vif *vif,
2362 struct ieee80211_channel *chan, int duration,
2363 enum ieee80211_roc_type type)
2364 {
2365 struct ath_softc *sc = hw->priv;
2366 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2367 int ret = 0;
2368
2369 mutex_lock(&sc->mutex);
2370
2371 if (WARN_ON(sc->offchannel.roc_vif)) {
2372 ret = -EBUSY;
2373 goto out;
2374 }
2375
2376 ath9k_ps_wakeup(sc);
2377 sc->offchannel.roc_vif = vif;
2378 sc->offchannel.roc_chan = chan;
2379 sc->offchannel.roc_duration = duration;
2380
2381 ath_dbg(common, CHAN_CTX,
2382 "RoC request on vif: %pM, type: %d duration: %d\n",
2383 vif->addr, type, duration);
2384
2385 if (sc->offchannel.state == ATH_OFFCHANNEL_IDLE) {
2386 ath_dbg(common, CHAN_CTX, "Starting RoC period\n");
2387 ath_offchannel_next(sc);
2388 }
2389
2390 out:
2391 mutex_unlock(&sc->mutex);
2392
2393 return ret;
2394 }
2395
ath9k_cancel_remain_on_channel(struct ieee80211_hw * hw)2396 static int ath9k_cancel_remain_on_channel(struct ieee80211_hw *hw)
2397 {
2398 struct ath_softc *sc = hw->priv;
2399 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2400
2401 mutex_lock(&sc->mutex);
2402
2403 ath_dbg(common, CHAN_CTX, "Cancel RoC\n");
2404 del_timer_sync(&sc->offchannel.timer);
2405
2406 if (sc->offchannel.roc_vif) {
2407 if (sc->offchannel.state >= ATH_OFFCHANNEL_ROC_START)
2408 ath_roc_complete(sc, ATH_ROC_COMPLETE_CANCEL);
2409 }
2410
2411 mutex_unlock(&sc->mutex);
2412
2413 return 0;
2414 }
2415
ath9k_add_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf)2416 static int ath9k_add_chanctx(struct ieee80211_hw *hw,
2417 struct ieee80211_chanctx_conf *conf)
2418 {
2419 struct ath_softc *sc = hw->priv;
2420 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2421 struct ath_chanctx *ctx, **ptr;
2422 int pos;
2423
2424 mutex_lock(&sc->mutex);
2425
2426 ath_for_each_chanctx(sc, ctx) {
2427 if (ctx->assigned)
2428 continue;
2429
2430 ptr = (void *) conf->drv_priv;
2431 *ptr = ctx;
2432 ctx->assigned = true;
2433 pos = ctx - &sc->chanctx[0];
2434 ctx->hw_queue_base = pos * IEEE80211_NUM_ACS;
2435
2436 ath_dbg(common, CHAN_CTX,
2437 "Add channel context: %d MHz\n",
2438 conf->def.chan->center_freq);
2439
2440 ath_chanctx_set_channel(sc, ctx, &conf->def);
2441
2442 mutex_unlock(&sc->mutex);
2443 return 0;
2444 }
2445
2446 mutex_unlock(&sc->mutex);
2447 return -ENOSPC;
2448 }
2449
2450
ath9k_remove_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf)2451 static void ath9k_remove_chanctx(struct ieee80211_hw *hw,
2452 struct ieee80211_chanctx_conf *conf)
2453 {
2454 struct ath_softc *sc = hw->priv;
2455 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2456 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2457
2458 mutex_lock(&sc->mutex);
2459
2460 ath_dbg(common, CHAN_CTX,
2461 "Remove channel context: %d MHz\n",
2462 conf->def.chan->center_freq);
2463
2464 ctx->assigned = false;
2465 ctx->hw_queue_base = 0;
2466 ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_UNASSIGN);
2467
2468 mutex_unlock(&sc->mutex);
2469 }
2470
ath9k_change_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf,u32 changed)2471 static void ath9k_change_chanctx(struct ieee80211_hw *hw,
2472 struct ieee80211_chanctx_conf *conf,
2473 u32 changed)
2474 {
2475 struct ath_softc *sc = hw->priv;
2476 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2477 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2478
2479 mutex_lock(&sc->mutex);
2480 ath_dbg(common, CHAN_CTX,
2481 "Change channel context: %d MHz\n",
2482 conf->def.chan->center_freq);
2483 ath_chanctx_set_channel(sc, ctx, &conf->def);
2484 mutex_unlock(&sc->mutex);
2485 }
2486
ath9k_assign_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_chanctx_conf * conf)2487 static int ath9k_assign_vif_chanctx(struct ieee80211_hw *hw,
2488 struct ieee80211_vif *vif,
2489 struct ieee80211_chanctx_conf *conf)
2490 {
2491 struct ath_softc *sc = hw->priv;
2492 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2493 struct ath_vif *avp = (void *)vif->drv_priv;
2494 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2495 int i;
2496
2497 ath9k_cancel_pending_offchannel(sc);
2498
2499 mutex_lock(&sc->mutex);
2500
2501 ath_dbg(common, CHAN_CTX,
2502 "Assign VIF (addr: %pM, type: %d, p2p: %d) to channel context: %d MHz\n",
2503 vif->addr, vif->type, vif->p2p,
2504 conf->def.chan->center_freq);
2505
2506 avp->chanctx = ctx;
2507 ctx->nvifs_assigned++;
2508 list_add_tail(&avp->list, &ctx->vifs);
2509 ath9k_calculate_summary_state(sc, ctx);
2510 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2511 vif->hw_queue[i] = ctx->hw_queue_base + i;
2512
2513 mutex_unlock(&sc->mutex);
2514
2515 return 0;
2516 }
2517
ath9k_unassign_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_chanctx_conf * conf)2518 static void ath9k_unassign_vif_chanctx(struct ieee80211_hw *hw,
2519 struct ieee80211_vif *vif,
2520 struct ieee80211_chanctx_conf *conf)
2521 {
2522 struct ath_softc *sc = hw->priv;
2523 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2524 struct ath_vif *avp = (void *)vif->drv_priv;
2525 struct ath_chanctx *ctx = ath_chanctx_get(conf);
2526 int ac;
2527
2528 ath9k_cancel_pending_offchannel(sc);
2529
2530 mutex_lock(&sc->mutex);
2531
2532 ath_dbg(common, CHAN_CTX,
2533 "Remove VIF (addr: %pM, type: %d, p2p: %d) from channel context: %d MHz\n",
2534 vif->addr, vif->type, vif->p2p,
2535 conf->def.chan->center_freq);
2536
2537 avp->chanctx = NULL;
2538 ctx->nvifs_assigned--;
2539 list_del(&avp->list);
2540 ath9k_calculate_summary_state(sc, ctx);
2541 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2542 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
2543
2544 mutex_unlock(&sc->mutex);
2545 }
2546
ath9k_mgd_prepare_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 duration)2547 static void ath9k_mgd_prepare_tx(struct ieee80211_hw *hw,
2548 struct ieee80211_vif *vif,
2549 u16 duration)
2550 {
2551 struct ath_softc *sc = hw->priv;
2552 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2553 struct ath_vif *avp = (struct ath_vif *) vif->drv_priv;
2554 struct ath_beacon_config *cur_conf;
2555 struct ath_chanctx *go_ctx;
2556 unsigned long timeout;
2557 bool changed = false;
2558 u32 beacon_int;
2559
2560 if (!test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags))
2561 return;
2562
2563 if (!avp->chanctx)
2564 return;
2565
2566 mutex_lock(&sc->mutex);
2567
2568 spin_lock_bh(&sc->chan_lock);
2569 if (sc->next_chan || (sc->cur_chan != avp->chanctx))
2570 changed = true;
2571 spin_unlock_bh(&sc->chan_lock);
2572
2573 if (!changed)
2574 goto out;
2575
2576 ath9k_cancel_pending_offchannel(sc);
2577
2578 go_ctx = ath_is_go_chanctx_present(sc);
2579
2580 if (go_ctx) {
2581 /*
2582 * Wait till the GO interface gets a chance
2583 * to send out an NoA.
2584 */
2585 spin_lock_bh(&sc->chan_lock);
2586 sc->sched.mgd_prepare_tx = true;
2587 cur_conf = &go_ctx->beacon;
2588 beacon_int = TU_TO_USEC(cur_conf->beacon_interval);
2589 spin_unlock_bh(&sc->chan_lock);
2590
2591 timeout = usecs_to_jiffies(beacon_int * 2);
2592 init_completion(&sc->go_beacon);
2593
2594 mutex_unlock(&sc->mutex);
2595
2596 if (wait_for_completion_timeout(&sc->go_beacon,
2597 timeout) == 0) {
2598 ath_dbg(common, CHAN_CTX,
2599 "Failed to send new NoA\n");
2600
2601 spin_lock_bh(&sc->chan_lock);
2602 sc->sched.mgd_prepare_tx = false;
2603 spin_unlock_bh(&sc->chan_lock);
2604 }
2605
2606 mutex_lock(&sc->mutex);
2607 }
2608
2609 ath_dbg(common, CHAN_CTX,
2610 "%s: Set chanctx state to FORCE_ACTIVE for vif: %pM\n",
2611 __func__, vif->addr);
2612
2613 spin_lock_bh(&sc->chan_lock);
2614 sc->next_chan = avp->chanctx;
2615 sc->sched.state = ATH_CHANCTX_STATE_FORCE_ACTIVE;
2616 spin_unlock_bh(&sc->chan_lock);
2617
2618 ath_chanctx_set_next(sc, true);
2619 out:
2620 mutex_unlock(&sc->mutex);
2621 }
2622
ath9k_fill_chanctx_ops(void)2623 void ath9k_fill_chanctx_ops(void)
2624 {
2625 if (!ath9k_is_chanctx_enabled())
2626 return;
2627
2628 ath9k_ops.hw_scan = ath9k_hw_scan;
2629 ath9k_ops.cancel_hw_scan = ath9k_cancel_hw_scan;
2630 ath9k_ops.remain_on_channel = ath9k_remain_on_channel;
2631 ath9k_ops.cancel_remain_on_channel = ath9k_cancel_remain_on_channel;
2632 ath9k_ops.add_chanctx = ath9k_add_chanctx;
2633 ath9k_ops.remove_chanctx = ath9k_remove_chanctx;
2634 ath9k_ops.change_chanctx = ath9k_change_chanctx;
2635 ath9k_ops.assign_vif_chanctx = ath9k_assign_vif_chanctx;
2636 ath9k_ops.unassign_vif_chanctx = ath9k_unassign_vif_chanctx;
2637 ath9k_ops.mgd_prepare_tx = ath9k_mgd_prepare_tx;
2638 }
2639
2640 #endif
2641
ath9k_get_txpower(struct ieee80211_hw * hw,struct ieee80211_vif * vif,int * dbm)2642 static int ath9k_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2643 int *dbm)
2644 {
2645 struct ath_softc *sc = hw->priv;
2646 struct ath_vif *avp = (void *)vif->drv_priv;
2647
2648 mutex_lock(&sc->mutex);
2649 if (avp->chanctx)
2650 *dbm = avp->chanctx->cur_txpower;
2651 else
2652 *dbm = sc->cur_chan->cur_txpower;
2653 mutex_unlock(&sc->mutex);
2654
2655 *dbm /= 2;
2656
2657 return 0;
2658 }
2659
2660 struct ieee80211_ops ath9k_ops = {
2661 .tx = ath9k_tx,
2662 .start = ath9k_start,
2663 .stop = ath9k_stop,
2664 .add_interface = ath9k_add_interface,
2665 .change_interface = ath9k_change_interface,
2666 .remove_interface = ath9k_remove_interface,
2667 .config = ath9k_config,
2668 .configure_filter = ath9k_configure_filter,
2669 .sta_state = ath9k_sta_state,
2670 .sta_notify = ath9k_sta_notify,
2671 .conf_tx = ath9k_conf_tx,
2672 .bss_info_changed = ath9k_bss_info_changed,
2673 .set_key = ath9k_set_key,
2674 .get_tsf = ath9k_get_tsf,
2675 .set_tsf = ath9k_set_tsf,
2676 .reset_tsf = ath9k_reset_tsf,
2677 .ampdu_action = ath9k_ampdu_action,
2678 .get_survey = ath9k_get_survey,
2679 .rfkill_poll = ath9k_rfkill_poll_state,
2680 .set_coverage_class = ath9k_set_coverage_class,
2681 .flush = ath9k_flush,
2682 .tx_frames_pending = ath9k_tx_frames_pending,
2683 .tx_last_beacon = ath9k_tx_last_beacon,
2684 .release_buffered_frames = ath9k_release_buffered_frames,
2685 .get_stats = ath9k_get_stats,
2686 .set_antenna = ath9k_set_antenna,
2687 .get_antenna = ath9k_get_antenna,
2688
2689 #ifdef CONFIG_ATH9K_WOW
2690 .suspend = ath9k_suspend,
2691 .resume = ath9k_resume,
2692 .set_wakeup = ath9k_set_wakeup,
2693 #endif
2694
2695 #ifdef CONFIG_ATH9K_DEBUGFS
2696 .get_et_sset_count = ath9k_get_et_sset_count,
2697 .get_et_stats = ath9k_get_et_stats,
2698 .get_et_strings = ath9k_get_et_strings,
2699 #endif
2700
2701 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_STATION_STATISTICS)
2702 .sta_add_debugfs = ath9k_sta_add_debugfs,
2703 #endif
2704 .sw_scan_start = ath9k_sw_scan_start,
2705 .sw_scan_complete = ath9k_sw_scan_complete,
2706 .get_txpower = ath9k_get_txpower,
2707 .wake_tx_queue = ath9k_wake_tx_queue,
2708 };
2709
