mac80211: let drivers inform it about per TID buffered frames
[linux-2.6.git] / drivers / net / wireless / ath / ath9k / main.c
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 u8 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
57 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
58 {
59         bool pending = false;
60
61         spin_lock_bh(&txq->axq_lock);
62
63         if (txq->axq_depth || !list_empty(&txq->axq_acq))
64                 pending = true;
65
66         spin_unlock_bh(&txq->axq_lock);
67         return pending;
68 }
69
70 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
71 {
72         unsigned long flags;
73         bool ret;
74
75         spin_lock_irqsave(&sc->sc_pm_lock, flags);
76         ret = ath9k_hw_setpower(sc->sc_ah, mode);
77         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
78
79         return ret;
80 }
81
82 void ath9k_ps_wakeup(struct ath_softc *sc)
83 {
84         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
85         unsigned long flags;
86         enum ath9k_power_mode power_mode;
87
88         spin_lock_irqsave(&sc->sc_pm_lock, flags);
89         if (++sc->ps_usecount != 1)
90                 goto unlock;
91
92         power_mode = sc->sc_ah->power_mode;
93         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
94
95         /*
96          * While the hardware is asleep, the cycle counters contain no
97          * useful data. Better clear them now so that they don't mess up
98          * survey data results.
99          */
100         if (power_mode != ATH9K_PM_AWAKE) {
101                 spin_lock(&common->cc_lock);
102                 ath_hw_cycle_counters_update(common);
103                 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
104                 spin_unlock(&common->cc_lock);
105         }
106
107  unlock:
108         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
109 }
110
111 void ath9k_ps_restore(struct ath_softc *sc)
112 {
113         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
114         enum ath9k_power_mode mode;
115         unsigned long flags;
116
117         spin_lock_irqsave(&sc->sc_pm_lock, flags);
118         if (--sc->ps_usecount != 0)
119                 goto unlock;
120
121         if (sc->ps_idle)
122                 mode = ATH9K_PM_FULL_SLEEP;
123         else if (sc->ps_enabled &&
124                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
125                               PS_WAIT_FOR_CAB |
126                               PS_WAIT_FOR_PSPOLL_DATA |
127                               PS_WAIT_FOR_TX_ACK)))
128                 mode = ATH9K_PM_NETWORK_SLEEP;
129         else
130                 goto unlock;
131
132         spin_lock(&common->cc_lock);
133         ath_hw_cycle_counters_update(common);
134         spin_unlock(&common->cc_lock);
135
136         ath9k_hw_setpower(sc->sc_ah, mode);
137
138  unlock:
139         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
140 }
141
142 void ath_start_ani(struct ath_common *common)
143 {
144         struct ath_hw *ah = common->ah;
145         unsigned long timestamp = jiffies_to_msecs(jiffies);
146         struct ath_softc *sc = (struct ath_softc *) common->priv;
147
148         if (!(sc->sc_flags & SC_OP_ANI_RUN))
149                 return;
150
151         if (sc->sc_flags & SC_OP_OFFCHANNEL)
152                 return;
153
154         common->ani.longcal_timer = timestamp;
155         common->ani.shortcal_timer = timestamp;
156         common->ani.checkani_timer = timestamp;
157
158         mod_timer(&common->ani.timer,
159                   jiffies +
160                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
161 }
162
163 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
164 {
165         struct ath_hw *ah = sc->sc_ah;
166         struct ath9k_channel *chan = &ah->channels[channel];
167         struct survey_info *survey = &sc->survey[channel];
168
169         if (chan->noisefloor) {
170                 survey->filled |= SURVEY_INFO_NOISE_DBM;
171                 survey->noise = ath9k_hw_getchan_noise(ah, chan);
172         }
173 }
174
175 /*
176  * Updates the survey statistics and returns the busy time since last
177  * update in %, if the measurement duration was long enough for the
178  * result to be useful, -1 otherwise.
179  */
180 static int ath_update_survey_stats(struct ath_softc *sc)
181 {
182         struct ath_hw *ah = sc->sc_ah;
183         struct ath_common *common = ath9k_hw_common(ah);
184         int pos = ah->curchan - &ah->channels[0];
185         struct survey_info *survey = &sc->survey[pos];
186         struct ath_cycle_counters *cc = &common->cc_survey;
187         unsigned int div = common->clockrate * 1000;
188         int ret = 0;
189
190         if (!ah->curchan)
191                 return -1;
192
193         if (ah->power_mode == ATH9K_PM_AWAKE)
194                 ath_hw_cycle_counters_update(common);
195
196         if (cc->cycles > 0) {
197                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
198                         SURVEY_INFO_CHANNEL_TIME_BUSY |
199                         SURVEY_INFO_CHANNEL_TIME_RX |
200                         SURVEY_INFO_CHANNEL_TIME_TX;
201                 survey->channel_time += cc->cycles / div;
202                 survey->channel_time_busy += cc->rx_busy / div;
203                 survey->channel_time_rx += cc->rx_frame / div;
204                 survey->channel_time_tx += cc->tx_frame / div;
205         }
206
207         if (cc->cycles < div)
208                 return -1;
209
210         if (cc->cycles > 0)
211                 ret = cc->rx_busy * 100 / cc->cycles;
212
213         memset(cc, 0, sizeof(*cc));
214
215         ath_update_survey_nf(sc, pos);
216
217         return ret;
218 }
219
220 static void __ath_cancel_work(struct ath_softc *sc)
221 {
222         cancel_work_sync(&sc->paprd_work);
223         cancel_work_sync(&sc->hw_check_work);
224         cancel_delayed_work_sync(&sc->tx_complete_work);
225         cancel_delayed_work_sync(&sc->hw_pll_work);
226 }
227
228 static void ath_cancel_work(struct ath_softc *sc)
229 {
230         __ath_cancel_work(sc);
231         cancel_work_sync(&sc->hw_reset_work);
232 }
233
234 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
235 {
236         struct ath_hw *ah = sc->sc_ah;
237         struct ath_common *common = ath9k_hw_common(ah);
238         bool ret;
239
240         ieee80211_stop_queues(sc->hw);
241
242         sc->hw_busy_count = 0;
243         del_timer_sync(&common->ani.timer);
244
245         ath9k_debug_samp_bb_mac(sc);
246         ath9k_hw_disable_interrupts(ah);
247
248         ret = ath_drain_all_txq(sc, retry_tx);
249
250         if (!ath_stoprecv(sc))
251                 ret = false;
252
253         if (!flush) {
254                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
255                         ath_rx_tasklet(sc, 1, true);
256                 ath_rx_tasklet(sc, 1, false);
257         } else {
258                 ath_flushrecv(sc);
259         }
260
261         return ret;
262 }
263
264 static bool ath_complete_reset(struct ath_softc *sc, bool start)
265 {
266         struct ath_hw *ah = sc->sc_ah;
267         struct ath_common *common = ath9k_hw_common(ah);
268
269         if (ath_startrecv(sc) != 0) {
270                 ath_err(common, "Unable to restart recv logic\n");
271                 return false;
272         }
273
274         ath9k_cmn_update_txpow(ah, sc->curtxpow,
275                                sc->config.txpowlimit, &sc->curtxpow);
276         ath9k_hw_set_interrupts(ah, ah->imask);
277         ath9k_hw_enable_interrupts(ah);
278
279         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
280                 if (sc->sc_flags & SC_OP_BEACONS)
281                         ath_set_beacon(sc);
282
283                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
284                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
285                 if (!common->disable_ani)
286                         ath_start_ani(common);
287         }
288
289         if (ath9k_hw_ops(ah)->antdiv_comb_conf_get && sc->ant_rx != 3) {
290                 struct ath_hw_antcomb_conf div_ant_conf;
291                 u8 lna_conf;
292
293                 ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
294
295                 if (sc->ant_rx == 1)
296                         lna_conf = ATH_ANT_DIV_COMB_LNA1;
297                 else
298                         lna_conf = ATH_ANT_DIV_COMB_LNA2;
299                 div_ant_conf.main_lna_conf = lna_conf;
300                 div_ant_conf.alt_lna_conf = lna_conf;
301
302                 ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
303         }
304
305         ieee80211_wake_queues(sc->hw);
306
307         return true;
308 }
309
310 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
311                               bool retry_tx)
312 {
313         struct ath_hw *ah = sc->sc_ah;
314         struct ath_common *common = ath9k_hw_common(ah);
315         struct ath9k_hw_cal_data *caldata = NULL;
316         bool fastcc = true;
317         bool flush = false;
318         int r;
319
320         __ath_cancel_work(sc);
321
322         spin_lock_bh(&sc->sc_pcu_lock);
323
324         if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
325                 fastcc = false;
326                 caldata = &sc->caldata;
327         }
328
329         if (!hchan) {
330                 fastcc = false;
331                 flush = true;
332                 hchan = ah->curchan;
333         }
334
335         if (fastcc && !ath9k_hw_check_alive(ah))
336                 fastcc = false;
337
338         if (!ath_prepare_reset(sc, retry_tx, flush))
339                 fastcc = false;
340
341         ath_dbg(common, ATH_DBG_CONFIG,
342                 "Reset to %u MHz, HT40: %d fastcc: %d\n",
343                 hchan->channel, !!(hchan->channelFlags & (CHANNEL_HT40MINUS |
344                                                           CHANNEL_HT40PLUS)),
345                 fastcc);
346
347         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
348         if (r) {
349                 ath_err(common,
350                         "Unable to reset channel, reset status %d\n", r);
351                 goto out;
352         }
353
354         if (!ath_complete_reset(sc, true))
355                 r = -EIO;
356
357 out:
358         spin_unlock_bh(&sc->sc_pcu_lock);
359         return r;
360 }
361
362
363 /*
364  * Set/change channels.  If the channel is really being changed, it's done
365  * by reseting the chip.  To accomplish this we must first cleanup any pending
366  * DMA, then restart stuff.
367 */
368 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
369                     struct ath9k_channel *hchan)
370 {
371         int r;
372
373         if (sc->sc_flags & SC_OP_INVALID)
374                 return -EIO;
375
376         ath9k_ps_wakeup(sc);
377
378         r = ath_reset_internal(sc, hchan, false);
379
380         ath9k_ps_restore(sc);
381
382         return r;
383 }
384
385 static void ath_paprd_activate(struct ath_softc *sc)
386 {
387         struct ath_hw *ah = sc->sc_ah;
388         struct ath9k_hw_cal_data *caldata = ah->caldata;
389         int chain;
390
391         if (!caldata || !caldata->paprd_done)
392                 return;
393
394         ath9k_ps_wakeup(sc);
395         ar9003_paprd_enable(ah, false);
396         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
397                 if (!(ah->txchainmask & BIT(chain)))
398                         continue;
399
400                 ar9003_paprd_populate_single_table(ah, caldata, chain);
401         }
402
403         ar9003_paprd_enable(ah, true);
404         ath9k_ps_restore(sc);
405 }
406
407 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
408 {
409         struct ieee80211_hw *hw = sc->hw;
410         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
411         struct ath_hw *ah = sc->sc_ah;
412         struct ath_common *common = ath9k_hw_common(ah);
413         struct ath_tx_control txctl;
414         int time_left;
415
416         memset(&txctl, 0, sizeof(txctl));
417         txctl.txq = sc->tx.txq_map[WME_AC_BE];
418
419         memset(tx_info, 0, sizeof(*tx_info));
420         tx_info->band = hw->conf.channel->band;
421         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
422         tx_info->control.rates[0].idx = 0;
423         tx_info->control.rates[0].count = 1;
424         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
425         tx_info->control.rates[1].idx = -1;
426
427         init_completion(&sc->paprd_complete);
428         txctl.paprd = BIT(chain);
429
430         if (ath_tx_start(hw, skb, &txctl) != 0) {
431                 ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n");
432                 dev_kfree_skb_any(skb);
433                 return false;
434         }
435
436         time_left = wait_for_completion_timeout(&sc->paprd_complete,
437                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
438
439         if (!time_left)
440                 ath_dbg(common, ATH_DBG_CALIBRATE,
441                         "Timeout waiting for paprd training on TX chain %d\n",
442                         chain);
443
444         return !!time_left;
445 }
446
447 void ath_paprd_calibrate(struct work_struct *work)
448 {
449         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
450         struct ieee80211_hw *hw = sc->hw;
451         struct ath_hw *ah = sc->sc_ah;
452         struct ieee80211_hdr *hdr;
453         struct sk_buff *skb = NULL;
454         struct ath9k_hw_cal_data *caldata = ah->caldata;
455         struct ath_common *common = ath9k_hw_common(ah);
456         int ftype;
457         int chain_ok = 0;
458         int chain;
459         int len = 1800;
460
461         if (!caldata)
462                 return;
463
464         ath9k_ps_wakeup(sc);
465
466         if (ar9003_paprd_init_table(ah) < 0)
467                 goto fail_paprd;
468
469         skb = alloc_skb(len, GFP_KERNEL);
470         if (!skb)
471                 goto fail_paprd;
472
473         skb_put(skb, len);
474         memset(skb->data, 0, len);
475         hdr = (struct ieee80211_hdr *)skb->data;
476         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
477         hdr->frame_control = cpu_to_le16(ftype);
478         hdr->duration_id = cpu_to_le16(10);
479         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
480         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
481         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
482
483         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
484                 if (!(ah->txchainmask & BIT(chain)))
485                         continue;
486
487                 chain_ok = 0;
488
489                 ath_dbg(common, ATH_DBG_CALIBRATE,
490                         "Sending PAPRD frame for thermal measurement "
491                         "on chain %d\n", chain);
492                 if (!ath_paprd_send_frame(sc, skb, chain))
493                         goto fail_paprd;
494
495                 ar9003_paprd_setup_gain_table(ah, chain);
496
497                 ath_dbg(common, ATH_DBG_CALIBRATE,
498                         "Sending PAPRD training frame on chain %d\n", chain);
499                 if (!ath_paprd_send_frame(sc, skb, chain))
500                         goto fail_paprd;
501
502                 if (!ar9003_paprd_is_done(ah)) {
503                         ath_dbg(common, ATH_DBG_CALIBRATE,
504                                 "PAPRD not yet done on chain %d\n", chain);
505                         break;
506                 }
507
508                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
509                         ath_dbg(common, ATH_DBG_CALIBRATE,
510                                 "PAPRD create curve failed on chain %d\n",
511                                                                    chain);
512                         break;
513                 }
514
515                 chain_ok = 1;
516         }
517         kfree_skb(skb);
518
519         if (chain_ok) {
520                 caldata->paprd_done = true;
521                 ath_paprd_activate(sc);
522         }
523
524 fail_paprd:
525         ath9k_ps_restore(sc);
526 }
527
528 /*
529  *  This routine performs the periodic noise floor calibration function
530  *  that is used to adjust and optimize the chip performance.  This
531  *  takes environmental changes (location, temperature) into account.
532  *  When the task is complete, it reschedules itself depending on the
533  *  appropriate interval that was calculated.
534  */
535 void ath_ani_calibrate(unsigned long data)
536 {
537         struct ath_softc *sc = (struct ath_softc *)data;
538         struct ath_hw *ah = sc->sc_ah;
539         struct ath_common *common = ath9k_hw_common(ah);
540         bool longcal = false;
541         bool shortcal = false;
542         bool aniflag = false;
543         unsigned int timestamp = jiffies_to_msecs(jiffies);
544         u32 cal_interval, short_cal_interval, long_cal_interval;
545         unsigned long flags;
546
547         if (ah->caldata && ah->caldata->nfcal_interference)
548                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
549         else
550                 long_cal_interval = ATH_LONG_CALINTERVAL;
551
552         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
553                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
554
555         /* Only calibrate if awake */
556         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
557                 goto set_timer;
558
559         ath9k_ps_wakeup(sc);
560
561         /* Long calibration runs independently of short calibration. */
562         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
563                 longcal = true;
564                 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
565                 common->ani.longcal_timer = timestamp;
566         }
567
568         /* Short calibration applies only while caldone is false */
569         if (!common->ani.caldone) {
570                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
571                         shortcal = true;
572                         ath_dbg(common, ATH_DBG_ANI,
573                                 "shortcal @%lu\n", jiffies);
574                         common->ani.shortcal_timer = timestamp;
575                         common->ani.resetcal_timer = timestamp;
576                 }
577         } else {
578                 if ((timestamp - common->ani.resetcal_timer) >=
579                     ATH_RESTART_CALINTERVAL) {
580                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
581                         if (common->ani.caldone)
582                                 common->ani.resetcal_timer = timestamp;
583                 }
584         }
585
586         /* Verify whether we must check ANI */
587         if ((timestamp - common->ani.checkani_timer) >=
588              ah->config.ani_poll_interval) {
589                 aniflag = true;
590                 common->ani.checkani_timer = timestamp;
591         }
592
593         /* Call ANI routine if necessary */
594         if (aniflag) {
595                 spin_lock_irqsave(&common->cc_lock, flags);
596                 ath9k_hw_ani_monitor(ah, ah->curchan);
597                 ath_update_survey_stats(sc);
598                 spin_unlock_irqrestore(&common->cc_lock, flags);
599         }
600
601         /* Perform calibration if necessary */
602         if (longcal || shortcal) {
603                 common->ani.caldone =
604                         ath9k_hw_calibrate(ah, ah->curchan,
605                                                 ah->rxchainmask, longcal);
606         }
607
608         ath9k_ps_restore(sc);
609
610 set_timer:
611         /*
612         * Set timer interval based on previous results.
613         * The interval must be the shortest necessary to satisfy ANI,
614         * short calibration and long calibration.
615         */
616         ath9k_debug_samp_bb_mac(sc);
617         cal_interval = ATH_LONG_CALINTERVAL;
618         if (sc->sc_ah->config.enable_ani)
619                 cal_interval = min(cal_interval,
620                                    (u32)ah->config.ani_poll_interval);
621         if (!common->ani.caldone)
622                 cal_interval = min(cal_interval, (u32)short_cal_interval);
623
624         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
625         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
626                 if (!ah->caldata->paprd_done)
627                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
628                 else if (!ah->paprd_table_write_done)
629                         ath_paprd_activate(sc);
630         }
631 }
632
633 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
634 {
635         struct ath_node *an;
636         an = (struct ath_node *)sta->drv_priv;
637
638 #ifdef CONFIG_ATH9K_DEBUGFS
639         spin_lock(&sc->nodes_lock);
640         list_add(&an->list, &sc->nodes);
641         spin_unlock(&sc->nodes_lock);
642         an->sta = sta;
643 #endif
644         if (sc->sc_flags & SC_OP_TXAGGR) {
645                 ath_tx_node_init(sc, an);
646                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
647                                      sta->ht_cap.ampdu_factor);
648                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
649         }
650 }
651
652 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
653 {
654         struct ath_node *an = (struct ath_node *)sta->drv_priv;
655
656 #ifdef CONFIG_ATH9K_DEBUGFS
657         spin_lock(&sc->nodes_lock);
658         list_del(&an->list);
659         spin_unlock(&sc->nodes_lock);
660         an->sta = NULL;
661 #endif
662
663         if (sc->sc_flags & SC_OP_TXAGGR)
664                 ath_tx_node_cleanup(sc, an);
665 }
666
667
668 void ath9k_tasklet(unsigned long data)
669 {
670         struct ath_softc *sc = (struct ath_softc *)data;
671         struct ath_hw *ah = sc->sc_ah;
672         struct ath_common *common = ath9k_hw_common(ah);
673
674         u32 status = sc->intrstatus;
675         u32 rxmask;
676
677         ath9k_ps_wakeup(sc);
678         spin_lock(&sc->sc_pcu_lock);
679
680         if ((status & ATH9K_INT_FATAL) ||
681             (status & ATH9K_INT_BB_WATCHDOG)) {
682                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
683                 goto out;
684         }
685
686         /*
687          * Only run the baseband hang check if beacons stop working in AP or
688          * IBSS mode, because it has a high false positive rate. For station
689          * mode it should not be necessary, since the upper layers will detect
690          * this through a beacon miss automatically and the following channel
691          * change will trigger a hardware reset anyway
692          */
693         if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
694             !ath9k_hw_check_alive(ah))
695                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
696
697         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
698                 /*
699                  * TSF sync does not look correct; remain awake to sync with
700                  * the next Beacon.
701                  */
702                 ath_dbg(common, ATH_DBG_PS,
703                         "TSFOOR - Sync with next Beacon\n");
704                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
705         }
706
707         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
708                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
709                           ATH9K_INT_RXORN);
710         else
711                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
712
713         if (status & rxmask) {
714                 /* Check for high priority Rx first */
715                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
716                     (status & ATH9K_INT_RXHP))
717                         ath_rx_tasklet(sc, 0, true);
718
719                 ath_rx_tasklet(sc, 0, false);
720         }
721
722         if (status & ATH9K_INT_TX) {
723                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
724                         ath_tx_edma_tasklet(sc);
725                 else
726                         ath_tx_tasklet(sc);
727         }
728
729         if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
730                 if (status & ATH9K_INT_GENTIMER)
731                         ath_gen_timer_isr(sc->sc_ah);
732
733 out:
734         /* re-enable hardware interrupt */
735         ath9k_hw_enable_interrupts(ah);
736
737         spin_unlock(&sc->sc_pcu_lock);
738         ath9k_ps_restore(sc);
739 }
740
741 irqreturn_t ath_isr(int irq, void *dev)
742 {
743 #define SCHED_INTR (                            \
744                 ATH9K_INT_FATAL |               \
745                 ATH9K_INT_BB_WATCHDOG |         \
746                 ATH9K_INT_RXORN |               \
747                 ATH9K_INT_RXEOL |               \
748                 ATH9K_INT_RX |                  \
749                 ATH9K_INT_RXLP |                \
750                 ATH9K_INT_RXHP |                \
751                 ATH9K_INT_TX |                  \
752                 ATH9K_INT_BMISS |               \
753                 ATH9K_INT_CST |                 \
754                 ATH9K_INT_TSFOOR |              \
755                 ATH9K_INT_GENTIMER)
756
757         struct ath_softc *sc = dev;
758         struct ath_hw *ah = sc->sc_ah;
759         struct ath_common *common = ath9k_hw_common(ah);
760         enum ath9k_int status;
761         bool sched = false;
762
763         /*
764          * The hardware is not ready/present, don't
765          * touch anything. Note this can happen early
766          * on if the IRQ is shared.
767          */
768         if (sc->sc_flags & SC_OP_INVALID)
769                 return IRQ_NONE;
770
771
772         /* shared irq, not for us */
773
774         if (!ath9k_hw_intrpend(ah))
775                 return IRQ_NONE;
776
777         /*
778          * Figure out the reason(s) for the interrupt.  Note
779          * that the hal returns a pseudo-ISR that may include
780          * bits we haven't explicitly enabled so we mask the
781          * value to insure we only process bits we requested.
782          */
783         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
784         status &= ah->imask;    /* discard unasked-for bits */
785
786         /*
787          * If there are no status bits set, then this interrupt was not
788          * for me (should have been caught above).
789          */
790         if (!status)
791                 return IRQ_NONE;
792
793         /* Cache the status */
794         sc->intrstatus = status;
795
796         if (status & SCHED_INTR)
797                 sched = true;
798
799         /*
800          * If a FATAL or RXORN interrupt is received, we have to reset the
801          * chip immediately.
802          */
803         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
804             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
805                 goto chip_reset;
806
807         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
808             (status & ATH9K_INT_BB_WATCHDOG)) {
809
810                 spin_lock(&common->cc_lock);
811                 ath_hw_cycle_counters_update(common);
812                 ar9003_hw_bb_watchdog_dbg_info(ah);
813                 spin_unlock(&common->cc_lock);
814
815                 goto chip_reset;
816         }
817
818         if (status & ATH9K_INT_SWBA)
819                 tasklet_schedule(&sc->bcon_tasklet);
820
821         if (status & ATH9K_INT_TXURN)
822                 ath9k_hw_updatetxtriglevel(ah, true);
823
824         if (status & ATH9K_INT_RXEOL) {
825                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
826                 ath9k_hw_set_interrupts(ah, ah->imask);
827         }
828
829         if (status & ATH9K_INT_MIB) {
830                 /*
831                  * Disable interrupts until we service the MIB
832                  * interrupt; otherwise it will continue to
833                  * fire.
834                  */
835                 ath9k_hw_disable_interrupts(ah);
836                 /*
837                  * Let the hal handle the event. We assume
838                  * it will clear whatever condition caused
839                  * the interrupt.
840                  */
841                 spin_lock(&common->cc_lock);
842                 ath9k_hw_proc_mib_event(ah);
843                 spin_unlock(&common->cc_lock);
844                 ath9k_hw_enable_interrupts(ah);
845         }
846
847         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
848                 if (status & ATH9K_INT_TIM_TIMER) {
849                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
850                                 goto chip_reset;
851                         /* Clear RxAbort bit so that we can
852                          * receive frames */
853                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
854                         ath9k_hw_setrxabort(sc->sc_ah, 0);
855                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
856                 }
857
858 chip_reset:
859
860         ath_debug_stat_interrupt(sc, status);
861
862         if (sched) {
863                 /* turn off every interrupt */
864                 ath9k_hw_disable_interrupts(ah);
865                 tasklet_schedule(&sc->intr_tq);
866         }
867
868         return IRQ_HANDLED;
869
870 #undef SCHED_INTR
871 }
872
873 static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
874 {
875         struct ath_hw *ah = sc->sc_ah;
876         struct ath_common *common = ath9k_hw_common(ah);
877         struct ieee80211_channel *channel = hw->conf.channel;
878         int r;
879
880         ath9k_ps_wakeup(sc);
881         spin_lock_bh(&sc->sc_pcu_lock);
882         atomic_set(&ah->intr_ref_cnt, -1);
883
884         ath9k_hw_configpcipowersave(ah, false);
885
886         if (!ah->curchan)
887                 ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
888
889         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
890         if (r) {
891                 ath_err(common,
892                         "Unable to reset channel (%u MHz), reset status %d\n",
893                         channel->center_freq, r);
894         }
895
896         ath_complete_reset(sc, true);
897
898         /* Enable LED */
899         ath9k_hw_cfg_output(ah, ah->led_pin,
900                             AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
901         ath9k_hw_set_gpio(ah, ah->led_pin, 0);
902
903         spin_unlock_bh(&sc->sc_pcu_lock);
904
905         ath9k_ps_restore(sc);
906 }
907
908 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
909 {
910         struct ath_hw *ah = sc->sc_ah;
911         struct ieee80211_channel *channel = hw->conf.channel;
912         int r;
913
914         ath9k_ps_wakeup(sc);
915
916         ath_cancel_work(sc);
917
918         spin_lock_bh(&sc->sc_pcu_lock);
919
920         /*
921          * Keep the LED on when the radio is disabled
922          * during idle unassociated state.
923          */
924         if (!sc->ps_idle) {
925                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
926                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
927         }
928
929         ath_prepare_reset(sc, false, true);
930
931         if (!ah->curchan)
932                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
933
934         r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
935         if (r) {
936                 ath_err(ath9k_hw_common(sc->sc_ah),
937                         "Unable to reset channel (%u MHz), reset status %d\n",
938                         channel->center_freq, r);
939         }
940
941         ath9k_hw_phy_disable(ah);
942
943         ath9k_hw_configpcipowersave(ah, true);
944
945         spin_unlock_bh(&sc->sc_pcu_lock);
946         ath9k_ps_restore(sc);
947 }
948
949 static int ath_reset(struct ath_softc *sc, bool retry_tx)
950 {
951         int r;
952
953         ath9k_ps_wakeup(sc);
954
955         r = ath_reset_internal(sc, NULL, retry_tx);
956
957         if (retry_tx) {
958                 int i;
959                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
960                         if (ATH_TXQ_SETUP(sc, i)) {
961                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
962                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
963                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
964                         }
965                 }
966         }
967
968         ath9k_ps_restore(sc);
969
970         return r;
971 }
972
973 void ath_reset_work(struct work_struct *work)
974 {
975         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
976
977         ath_reset(sc, true);
978 }
979
980 void ath_hw_check(struct work_struct *work)
981 {
982         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
983         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
984         unsigned long flags;
985         int busy;
986
987         ath9k_ps_wakeup(sc);
988         if (ath9k_hw_check_alive(sc->sc_ah))
989                 goto out;
990
991         spin_lock_irqsave(&common->cc_lock, flags);
992         busy = ath_update_survey_stats(sc);
993         spin_unlock_irqrestore(&common->cc_lock, flags);
994
995         ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
996                 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
997         if (busy >= 99) {
998                 if (++sc->hw_busy_count >= 3)
999                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
1000
1001         } else if (busy >= 0)
1002                 sc->hw_busy_count = 0;
1003
1004 out:
1005         ath9k_ps_restore(sc);
1006 }
1007
1008 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
1009 {
1010         static int count;
1011         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1012
1013         if (pll_sqsum >= 0x40000) {
1014                 count++;
1015                 if (count == 3) {
1016                         /* Rx is hung for more than 500ms. Reset it */
1017                         ath_dbg(common, ATH_DBG_RESET,
1018                                 "Possible RX hang, resetting");
1019                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
1020                         count = 0;
1021                 }
1022         } else
1023                 count = 0;
1024 }
1025
1026 void ath_hw_pll_work(struct work_struct *work)
1027 {
1028         struct ath_softc *sc = container_of(work, struct ath_softc,
1029                                             hw_pll_work.work);
1030         u32 pll_sqsum;
1031
1032         if (AR_SREV_9485(sc->sc_ah)) {
1033
1034                 ath9k_ps_wakeup(sc);
1035                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
1036                 ath9k_ps_restore(sc);
1037
1038                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
1039
1040                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
1041         }
1042 }
1043
1044 /**********************/
1045 /* mac80211 callbacks */
1046 /**********************/
1047
1048 static int ath9k_start(struct ieee80211_hw *hw)
1049 {
1050         struct ath_softc *sc = hw->priv;
1051         struct ath_hw *ah = sc->sc_ah;
1052         struct ath_common *common = ath9k_hw_common(ah);
1053         struct ieee80211_channel *curchan = hw->conf.channel;
1054         struct ath9k_channel *init_channel;
1055         int r;
1056
1057         ath_dbg(common, ATH_DBG_CONFIG,
1058                 "Starting driver with initial channel: %d MHz\n",
1059                 curchan->center_freq);
1060
1061         ath9k_ps_wakeup(sc);
1062
1063         mutex_lock(&sc->mutex);
1064
1065         /* setup initial channel */
1066         sc->chan_idx = curchan->hw_value;
1067
1068         init_channel = ath9k_cmn_get_curchannel(hw, ah);
1069
1070         /* Reset SERDES registers */
1071         ath9k_hw_configpcipowersave(ah, false);
1072
1073         /*
1074          * The basic interface to setting the hardware in a good
1075          * state is ``reset''.  On return the hardware is known to
1076          * be powered up and with interrupts disabled.  This must
1077          * be followed by initialization of the appropriate bits
1078          * and then setup of the interrupt mask.
1079          */
1080         spin_lock_bh(&sc->sc_pcu_lock);
1081         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1082         if (r) {
1083                 ath_err(common,
1084                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1085                         r, curchan->center_freq);
1086                 spin_unlock_bh(&sc->sc_pcu_lock);
1087                 goto mutex_unlock;
1088         }
1089
1090         /* Setup our intr mask. */
1091         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1092                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1093                     ATH9K_INT_GLOBAL;
1094
1095         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1096                 ah->imask |= ATH9K_INT_RXHP |
1097                              ATH9K_INT_RXLP |
1098                              ATH9K_INT_BB_WATCHDOG;
1099         else
1100                 ah->imask |= ATH9K_INT_RX;
1101
1102         ah->imask |= ATH9K_INT_GTT;
1103
1104         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1105                 ah->imask |= ATH9K_INT_CST;
1106
1107         sc->sc_flags &= ~SC_OP_INVALID;
1108         sc->sc_ah->is_monitoring = false;
1109
1110         /* Disable BMISS interrupt when we're not associated */
1111         ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1112
1113         if (!ath_complete_reset(sc, false)) {
1114                 r = -EIO;
1115                 spin_unlock_bh(&sc->sc_pcu_lock);
1116                 goto mutex_unlock;
1117         }
1118
1119         spin_unlock_bh(&sc->sc_pcu_lock);
1120
1121         if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1122             !ah->btcoex_hw.enabled) {
1123                 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1124                                            AR_STOMP_LOW_WLAN_WGHT);
1125                 ath9k_hw_btcoex_enable(ah);
1126
1127                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1128                         ath9k_btcoex_timer_resume(sc);
1129         }
1130
1131         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1132                 common->bus_ops->extn_synch_en(common);
1133
1134 mutex_unlock:
1135         mutex_unlock(&sc->mutex);
1136
1137         ath9k_ps_restore(sc);
1138
1139         return r;
1140 }
1141
1142 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1143 {
1144         struct ath_softc *sc = hw->priv;
1145         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1146         struct ath_tx_control txctl;
1147         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1148
1149         if (sc->ps_enabled) {
1150                 /*
1151                  * mac80211 does not set PM field for normal data frames, so we
1152                  * need to update that based on the current PS mode.
1153                  */
1154                 if (ieee80211_is_data(hdr->frame_control) &&
1155                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1156                     !ieee80211_has_pm(hdr->frame_control)) {
1157                         ath_dbg(common, ATH_DBG_PS,
1158                                 "Add PM=1 for a TX frame while in PS mode\n");
1159                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1160                 }
1161         }
1162
1163         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1164                 /*
1165                  * We are using PS-Poll and mac80211 can request TX while in
1166                  * power save mode. Need to wake up hardware for the TX to be
1167                  * completed and if needed, also for RX of buffered frames.
1168                  */
1169                 ath9k_ps_wakeup(sc);
1170                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1171                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1172                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1173                         ath_dbg(common, ATH_DBG_PS,
1174                                 "Sending PS-Poll to pick a buffered frame\n");
1175                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1176                 } else {
1177                         ath_dbg(common, ATH_DBG_PS,
1178                                 "Wake up to complete TX\n");
1179                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1180                 }
1181                 /*
1182                  * The actual restore operation will happen only after
1183                  * the sc_flags bit is cleared. We are just dropping
1184                  * the ps_usecount here.
1185                  */
1186                 ath9k_ps_restore(sc);
1187         }
1188
1189         memset(&txctl, 0, sizeof(struct ath_tx_control));
1190         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1191
1192         ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1193
1194         if (ath_tx_start(hw, skb, &txctl) != 0) {
1195                 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1196                 goto exit;
1197         }
1198
1199         return;
1200 exit:
1201         dev_kfree_skb_any(skb);
1202 }
1203
1204 static void ath9k_stop(struct ieee80211_hw *hw)
1205 {
1206         struct ath_softc *sc = hw->priv;
1207         struct ath_hw *ah = sc->sc_ah;
1208         struct ath_common *common = ath9k_hw_common(ah);
1209
1210         mutex_lock(&sc->mutex);
1211
1212         ath_cancel_work(sc);
1213
1214         if (sc->sc_flags & SC_OP_INVALID) {
1215                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1216                 mutex_unlock(&sc->mutex);
1217                 return;
1218         }
1219
1220         /* Ensure HW is awake when we try to shut it down. */
1221         ath9k_ps_wakeup(sc);
1222
1223         if (ah->btcoex_hw.enabled) {
1224                 ath9k_hw_btcoex_disable(ah);
1225                 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1226                         ath9k_btcoex_timer_pause(sc);
1227         }
1228
1229         spin_lock_bh(&sc->sc_pcu_lock);
1230
1231         /* prevent tasklets to enable interrupts once we disable them */
1232         ah->imask &= ~ATH9K_INT_GLOBAL;
1233
1234         /* make sure h/w will not generate any interrupt
1235          * before setting the invalid flag. */
1236         ath9k_hw_disable_interrupts(ah);
1237
1238         if (!(sc->sc_flags & SC_OP_INVALID)) {
1239                 ath_drain_all_txq(sc, false);
1240                 ath_stoprecv(sc);
1241                 ath9k_hw_phy_disable(ah);
1242         } else
1243                 sc->rx.rxlink = NULL;
1244
1245         if (sc->rx.frag) {
1246                 dev_kfree_skb_any(sc->rx.frag);
1247                 sc->rx.frag = NULL;
1248         }
1249
1250         /* disable HAL and put h/w to sleep */
1251         ath9k_hw_disable(ah);
1252
1253         spin_unlock_bh(&sc->sc_pcu_lock);
1254
1255         /* we can now sync irq and kill any running tasklets, since we already
1256          * disabled interrupts and not holding a spin lock */
1257         synchronize_irq(sc->irq);
1258         tasklet_kill(&sc->intr_tq);
1259         tasklet_kill(&sc->bcon_tasklet);
1260
1261         ath9k_ps_restore(sc);
1262
1263         sc->ps_idle = true;
1264         ath_radio_disable(sc, hw);
1265
1266         sc->sc_flags |= SC_OP_INVALID;
1267
1268         mutex_unlock(&sc->mutex);
1269
1270         ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1271 }
1272
1273 bool ath9k_uses_beacons(int type)
1274 {
1275         switch (type) {
1276         case NL80211_IFTYPE_AP:
1277         case NL80211_IFTYPE_ADHOC:
1278         case NL80211_IFTYPE_MESH_POINT:
1279                 return true;
1280         default:
1281                 return false;
1282         }
1283 }
1284
1285 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1286                                  struct ieee80211_vif *vif)
1287 {
1288         struct ath_vif *avp = (void *)vif->drv_priv;
1289
1290         ath9k_set_beaconing_status(sc, false);
1291         ath_beacon_return(sc, avp);
1292         ath9k_set_beaconing_status(sc, true);
1293         sc->sc_flags &= ~SC_OP_BEACONS;
1294 }
1295
1296 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1297 {
1298         struct ath9k_vif_iter_data *iter_data = data;
1299         int i;
1300
1301         if (iter_data->hw_macaddr)
1302                 for (i = 0; i < ETH_ALEN; i++)
1303                         iter_data->mask[i] &=
1304                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1305
1306         switch (vif->type) {
1307         case NL80211_IFTYPE_AP:
1308                 iter_data->naps++;
1309                 break;
1310         case NL80211_IFTYPE_STATION:
1311                 iter_data->nstations++;
1312                 break;
1313         case NL80211_IFTYPE_ADHOC:
1314                 iter_data->nadhocs++;
1315                 break;
1316         case NL80211_IFTYPE_MESH_POINT:
1317                 iter_data->nmeshes++;
1318                 break;
1319         case NL80211_IFTYPE_WDS:
1320                 iter_data->nwds++;
1321                 break;
1322         default:
1323                 iter_data->nothers++;
1324                 break;
1325         }
1326 }
1327
1328 /* Called with sc->mutex held. */
1329 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1330                                struct ieee80211_vif *vif,
1331                                struct ath9k_vif_iter_data *iter_data)
1332 {
1333         struct ath_softc *sc = hw->priv;
1334         struct ath_hw *ah = sc->sc_ah;
1335         struct ath_common *common = ath9k_hw_common(ah);
1336
1337         /*
1338          * Use the hardware MAC address as reference, the hardware uses it
1339          * together with the BSSID mask when matching addresses.
1340          */
1341         memset(iter_data, 0, sizeof(*iter_data));
1342         iter_data->hw_macaddr = common->macaddr;
1343         memset(&iter_data->mask, 0xff, ETH_ALEN);
1344
1345         if (vif)
1346                 ath9k_vif_iter(iter_data, vif->addr, vif);
1347
1348         /* Get list of all active MAC addresses */
1349         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1350                                                    iter_data);
1351 }
1352
1353 /* Called with sc->mutex held. */
1354 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1355                                           struct ieee80211_vif *vif)
1356 {
1357         struct ath_softc *sc = hw->priv;
1358         struct ath_hw *ah = sc->sc_ah;
1359         struct ath_common *common = ath9k_hw_common(ah);
1360         struct ath9k_vif_iter_data iter_data;
1361
1362         ath9k_calculate_iter_data(hw, vif, &iter_data);
1363
1364         /* Set BSSID mask. */
1365         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1366         ath_hw_setbssidmask(common);
1367
1368         /* Set op-mode & TSF */
1369         if (iter_data.naps > 0) {
1370                 ath9k_hw_set_tsfadjust(ah, 1);
1371                 sc->sc_flags |= SC_OP_TSF_RESET;
1372                 ah->opmode = NL80211_IFTYPE_AP;
1373         } else {
1374                 ath9k_hw_set_tsfadjust(ah, 0);
1375                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1376
1377                 if (iter_data.nmeshes)
1378                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1379                 else if (iter_data.nwds)
1380                         ah->opmode = NL80211_IFTYPE_AP;
1381                 else if (iter_data.nadhocs)
1382                         ah->opmode = NL80211_IFTYPE_ADHOC;
1383                 else
1384                         ah->opmode = NL80211_IFTYPE_STATION;
1385         }
1386
1387         /*
1388          * Enable MIB interrupts when there are hardware phy counters.
1389          */
1390         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1391                 if (ah->config.enable_ani)
1392                         ah->imask |= ATH9K_INT_MIB;
1393                 ah->imask |= ATH9K_INT_TSFOOR;
1394         } else {
1395                 ah->imask &= ~ATH9K_INT_MIB;
1396                 ah->imask &= ~ATH9K_INT_TSFOOR;
1397         }
1398
1399         ath9k_hw_set_interrupts(ah, ah->imask);
1400
1401         /* Set up ANI */
1402         if (iter_data.naps > 0) {
1403                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1404
1405                 if (!common->disable_ani) {
1406                         sc->sc_flags |= SC_OP_ANI_RUN;
1407                         ath_start_ani(common);
1408                 }
1409
1410         } else {
1411                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1412                 del_timer_sync(&common->ani.timer);
1413         }
1414 }
1415
1416 /* Called with sc->mutex held, vif counts set up properly. */
1417 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1418                                    struct ieee80211_vif *vif)
1419 {
1420         struct ath_softc *sc = hw->priv;
1421
1422         ath9k_calculate_summary_state(hw, vif);
1423
1424         if (ath9k_uses_beacons(vif->type)) {
1425                 int error;
1426                 /* This may fail because upper levels do not have beacons
1427                  * properly configured yet.  That's OK, we assume it
1428                  * will be properly configured and then we will be notified
1429                  * in the info_changed method and set up beacons properly
1430                  * there.
1431                  */
1432                 ath9k_set_beaconing_status(sc, false);
1433                 error = ath_beacon_alloc(sc, vif);
1434                 if (!error)
1435                         ath_beacon_config(sc, vif);
1436                 ath9k_set_beaconing_status(sc, true);
1437         }
1438 }
1439
1440
1441 static int ath9k_add_interface(struct ieee80211_hw *hw,
1442                                struct ieee80211_vif *vif)
1443 {
1444         struct ath_softc *sc = hw->priv;
1445         struct ath_hw *ah = sc->sc_ah;
1446         struct ath_common *common = ath9k_hw_common(ah);
1447         int ret = 0;
1448
1449         ath9k_ps_wakeup(sc);
1450         mutex_lock(&sc->mutex);
1451
1452         switch (vif->type) {
1453         case NL80211_IFTYPE_STATION:
1454         case NL80211_IFTYPE_WDS:
1455         case NL80211_IFTYPE_ADHOC:
1456         case NL80211_IFTYPE_AP:
1457         case NL80211_IFTYPE_MESH_POINT:
1458                 break;
1459         default:
1460                 ath_err(common, "Interface type %d not yet supported\n",
1461                         vif->type);
1462                 ret = -EOPNOTSUPP;
1463                 goto out;
1464         }
1465
1466         if (ath9k_uses_beacons(vif->type)) {
1467                 if (sc->nbcnvifs >= ATH_BCBUF) {
1468                         ath_err(common, "Not enough beacon buffers when adding"
1469                                 " new interface of type: %i\n",
1470                                 vif->type);
1471                         ret = -ENOBUFS;
1472                         goto out;
1473                 }
1474         }
1475
1476         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1477             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1478              sc->nvifs > 0)) {
1479                 ath_err(common, "Cannot create ADHOC interface when other"
1480                         " interfaces already exist.\n");
1481                 ret = -EINVAL;
1482                 goto out;
1483         }
1484
1485         ath_dbg(common, ATH_DBG_CONFIG,
1486                 "Attach a VIF of type: %d\n", vif->type);
1487
1488         sc->nvifs++;
1489
1490         ath9k_do_vif_add_setup(hw, vif);
1491 out:
1492         mutex_unlock(&sc->mutex);
1493         ath9k_ps_restore(sc);
1494         return ret;
1495 }
1496
1497 static int ath9k_change_interface(struct ieee80211_hw *hw,
1498                                   struct ieee80211_vif *vif,
1499                                   enum nl80211_iftype new_type,
1500                                   bool p2p)
1501 {
1502         struct ath_softc *sc = hw->priv;
1503         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1504         int ret = 0;
1505
1506         ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1507         mutex_lock(&sc->mutex);
1508         ath9k_ps_wakeup(sc);
1509
1510         /* See if new interface type is valid. */
1511         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1512             (sc->nvifs > 1)) {
1513                 ath_err(common, "When using ADHOC, it must be the only"
1514                         " interface.\n");
1515                 ret = -EINVAL;
1516                 goto out;
1517         }
1518
1519         if (ath9k_uses_beacons(new_type) &&
1520             !ath9k_uses_beacons(vif->type)) {
1521                 if (sc->nbcnvifs >= ATH_BCBUF) {
1522                         ath_err(common, "No beacon slot available\n");
1523                         ret = -ENOBUFS;
1524                         goto out;
1525                 }
1526         }
1527
1528         /* Clean up old vif stuff */
1529         if (ath9k_uses_beacons(vif->type))
1530                 ath9k_reclaim_beacon(sc, vif);
1531
1532         /* Add new settings */
1533         vif->type = new_type;
1534         vif->p2p = p2p;
1535
1536         ath9k_do_vif_add_setup(hw, vif);
1537 out:
1538         ath9k_ps_restore(sc);
1539         mutex_unlock(&sc->mutex);
1540         return ret;
1541 }
1542
1543 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1544                                    struct ieee80211_vif *vif)
1545 {
1546         struct ath_softc *sc = hw->priv;
1547         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1548
1549         ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1550
1551         ath9k_ps_wakeup(sc);
1552         mutex_lock(&sc->mutex);
1553
1554         sc->nvifs--;
1555
1556         /* Reclaim beacon resources */
1557         if (ath9k_uses_beacons(vif->type))
1558                 ath9k_reclaim_beacon(sc, vif);
1559
1560         ath9k_calculate_summary_state(hw, NULL);
1561
1562         mutex_unlock(&sc->mutex);
1563         ath9k_ps_restore(sc);
1564 }
1565
1566 static void ath9k_enable_ps(struct ath_softc *sc)
1567 {
1568         struct ath_hw *ah = sc->sc_ah;
1569
1570         sc->ps_enabled = true;
1571         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1572                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1573                         ah->imask |= ATH9K_INT_TIM_TIMER;
1574                         ath9k_hw_set_interrupts(ah, ah->imask);
1575                 }
1576                 ath9k_hw_setrxabort(ah, 1);
1577         }
1578 }
1579
1580 static void ath9k_disable_ps(struct ath_softc *sc)
1581 {
1582         struct ath_hw *ah = sc->sc_ah;
1583
1584         sc->ps_enabled = false;
1585         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1586         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1587                 ath9k_hw_setrxabort(ah, 0);
1588                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1589                                   PS_WAIT_FOR_CAB |
1590                                   PS_WAIT_FOR_PSPOLL_DATA |
1591                                   PS_WAIT_FOR_TX_ACK);
1592                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1593                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1594                         ath9k_hw_set_interrupts(ah, ah->imask);
1595                 }
1596         }
1597
1598 }
1599
1600 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1601 {
1602         struct ath_softc *sc = hw->priv;
1603         struct ath_hw *ah = sc->sc_ah;
1604         struct ath_common *common = ath9k_hw_common(ah);
1605         struct ieee80211_conf *conf = &hw->conf;
1606         bool disable_radio = false;
1607
1608         mutex_lock(&sc->mutex);
1609
1610         /*
1611          * Leave this as the first check because we need to turn on the
1612          * radio if it was disabled before prior to processing the rest
1613          * of the changes. Likewise we must only disable the radio towards
1614          * the end.
1615          */
1616         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1617                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1618                 if (!sc->ps_idle) {
1619                         ath_radio_enable(sc, hw);
1620                         ath_dbg(common, ATH_DBG_CONFIG,
1621                                 "not-idle: enabling radio\n");
1622                 } else {
1623                         disable_radio = true;
1624                 }
1625         }
1626
1627         /*
1628          * We just prepare to enable PS. We have to wait until our AP has
1629          * ACK'd our null data frame to disable RX otherwise we'll ignore
1630          * those ACKs and end up retransmitting the same null data frames.
1631          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1632          */
1633         if (changed & IEEE80211_CONF_CHANGE_PS) {
1634                 unsigned long flags;
1635                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1636                 if (conf->flags & IEEE80211_CONF_PS)
1637                         ath9k_enable_ps(sc);
1638                 else
1639                         ath9k_disable_ps(sc);
1640                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1641         }
1642
1643         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1644                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1645                         ath_dbg(common, ATH_DBG_CONFIG,
1646                                 "Monitor mode is enabled\n");
1647                         sc->sc_ah->is_monitoring = true;
1648                 } else {
1649                         ath_dbg(common, ATH_DBG_CONFIG,
1650                                 "Monitor mode is disabled\n");
1651                         sc->sc_ah->is_monitoring = false;
1652                 }
1653         }
1654
1655         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1656                 struct ieee80211_channel *curchan = hw->conf.channel;
1657                 struct ath9k_channel old_chan;
1658                 int pos = curchan->hw_value;
1659                 int old_pos = -1;
1660                 unsigned long flags;
1661
1662                 if (ah->curchan)
1663                         old_pos = ah->curchan - &ah->channels[0];
1664
1665                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1666                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1667                 else
1668                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1669
1670                 ath_dbg(common, ATH_DBG_CONFIG,
1671                         "Set channel: %d MHz type: %d\n",
1672                         curchan->center_freq, conf->channel_type);
1673
1674                 /* update survey stats for the old channel before switching */
1675                 spin_lock_irqsave(&common->cc_lock, flags);
1676                 ath_update_survey_stats(sc);
1677                 spin_unlock_irqrestore(&common->cc_lock, flags);
1678
1679                 /*
1680                  * Preserve the current channel values, before updating
1681                  * the same channel
1682                  */
1683                 if (old_pos == pos) {
1684                         memcpy(&old_chan, &sc->sc_ah->channels[pos],
1685                                 sizeof(struct ath9k_channel));
1686                         ah->curchan = &old_chan;
1687                 }
1688
1689                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1690                                           curchan, conf->channel_type);
1691
1692                 /*
1693                  * If the operating channel changes, change the survey in-use flags
1694                  * along with it.
1695                  * Reset the survey data for the new channel, unless we're switching
1696                  * back to the operating channel from an off-channel operation.
1697                  */
1698                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1699                     sc->cur_survey != &sc->survey[pos]) {
1700
1701                         if (sc->cur_survey)
1702                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1703
1704                         sc->cur_survey = &sc->survey[pos];
1705
1706                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1707                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1708                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1709                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1710                 }
1711
1712                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1713                         ath_err(common, "Unable to set channel\n");
1714                         mutex_unlock(&sc->mutex);
1715                         return -EINVAL;
1716                 }
1717
1718                 /*
1719                  * The most recent snapshot of channel->noisefloor for the old
1720                  * channel is only available after the hardware reset. Copy it to
1721                  * the survey stats now.
1722                  */
1723                 if (old_pos >= 0)
1724                         ath_update_survey_nf(sc, old_pos);
1725         }
1726
1727         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1728                 ath_dbg(common, ATH_DBG_CONFIG,
1729                         "Set power: %d\n", conf->power_level);
1730                 sc->config.txpowlimit = 2 * conf->power_level;
1731                 ath9k_ps_wakeup(sc);
1732                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1733                                        sc->config.txpowlimit, &sc->curtxpow);
1734                 ath9k_ps_restore(sc);
1735         }
1736
1737         if (disable_radio) {
1738                 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1739                 ath_radio_disable(sc, hw);
1740         }
1741
1742         mutex_unlock(&sc->mutex);
1743
1744         return 0;
1745 }
1746
1747 #define SUPPORTED_FILTERS                       \
1748         (FIF_PROMISC_IN_BSS |                   \
1749         FIF_ALLMULTI |                          \
1750         FIF_CONTROL |                           \
1751         FIF_PSPOLL |                            \
1752         FIF_OTHER_BSS |                         \
1753         FIF_BCN_PRBRESP_PROMISC |               \
1754         FIF_PROBE_REQ |                         \
1755         FIF_FCSFAIL)
1756
1757 /* FIXME: sc->sc_full_reset ? */
1758 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1759                                    unsigned int changed_flags,
1760                                    unsigned int *total_flags,
1761                                    u64 multicast)
1762 {
1763         struct ath_softc *sc = hw->priv;
1764         u32 rfilt;
1765
1766         changed_flags &= SUPPORTED_FILTERS;
1767         *total_flags &= SUPPORTED_FILTERS;
1768
1769         sc->rx.rxfilter = *total_flags;
1770         ath9k_ps_wakeup(sc);
1771         rfilt = ath_calcrxfilter(sc);
1772         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1773         ath9k_ps_restore(sc);
1774
1775         ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1776                 "Set HW RX filter: 0x%x\n", rfilt);
1777 }
1778
1779 static int ath9k_sta_add(struct ieee80211_hw *hw,
1780                          struct ieee80211_vif *vif,
1781                          struct ieee80211_sta *sta)
1782 {
1783         struct ath_softc *sc = hw->priv;
1784         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1785         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1786         struct ieee80211_key_conf ps_key = { };
1787
1788         ath_node_attach(sc, sta);
1789
1790         if (vif->type != NL80211_IFTYPE_AP &&
1791             vif->type != NL80211_IFTYPE_AP_VLAN)
1792                 return 0;
1793
1794         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1795
1796         return 0;
1797 }
1798
1799 static void ath9k_del_ps_key(struct ath_softc *sc,
1800                              struct ieee80211_vif *vif,
1801                              struct ieee80211_sta *sta)
1802 {
1803         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1804         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1805         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1806
1807         if (!an->ps_key)
1808             return;
1809
1810         ath_key_delete(common, &ps_key);
1811 }
1812
1813 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1814                             struct ieee80211_vif *vif,
1815                             struct ieee80211_sta *sta)
1816 {
1817         struct ath_softc *sc = hw->priv;
1818
1819         ath9k_del_ps_key(sc, vif, sta);
1820         ath_node_detach(sc, sta);
1821
1822         return 0;
1823 }
1824
1825 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1826                          struct ieee80211_vif *vif,
1827                          enum sta_notify_cmd cmd,
1828                          struct ieee80211_sta *sta)
1829 {
1830         struct ath_softc *sc = hw->priv;
1831         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1832
1833         switch (cmd) {
1834         case STA_NOTIFY_SLEEP:
1835                 an->sleeping = true;
1836                 ath_tx_aggr_sleep(sta, sc, an);
1837                 break;
1838         case STA_NOTIFY_AWAKE:
1839                 an->sleeping = false;
1840                 ath_tx_aggr_wakeup(sc, an);
1841                 break;
1842         }
1843 }
1844
1845 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1846                          const struct ieee80211_tx_queue_params *params)
1847 {
1848         struct ath_softc *sc = hw->priv;
1849         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1850         struct ath_txq *txq;
1851         struct ath9k_tx_queue_info qi;
1852         int ret = 0;
1853
1854         if (queue >= WME_NUM_AC)
1855                 return 0;
1856
1857         txq = sc->tx.txq_map[queue];
1858
1859         ath9k_ps_wakeup(sc);
1860         mutex_lock(&sc->mutex);
1861
1862         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1863
1864         qi.tqi_aifs = params->aifs;
1865         qi.tqi_cwmin = params->cw_min;
1866         qi.tqi_cwmax = params->cw_max;
1867         qi.tqi_burstTime = params->txop;
1868
1869         ath_dbg(common, ATH_DBG_CONFIG,
1870                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1871                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1872                 params->cw_max, params->txop);
1873
1874         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1875         if (ret)
1876                 ath_err(common, "TXQ Update failed\n");
1877
1878         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1879                 if (queue == WME_AC_BE && !ret)
1880                         ath_beaconq_config(sc);
1881
1882         mutex_unlock(&sc->mutex);
1883         ath9k_ps_restore(sc);
1884
1885         return ret;
1886 }
1887
1888 static int ath9k_set_key(struct ieee80211_hw *hw,
1889                          enum set_key_cmd cmd,
1890                          struct ieee80211_vif *vif,
1891                          struct ieee80211_sta *sta,
1892                          struct ieee80211_key_conf *key)
1893 {
1894         struct ath_softc *sc = hw->priv;
1895         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1896         int ret = 0;
1897
1898         if (ath9k_modparam_nohwcrypt)
1899                 return -ENOSPC;
1900
1901         if (vif->type == NL80211_IFTYPE_ADHOC &&
1902             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1903              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1904             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1905                 /*
1906                  * For now, disable hw crypto for the RSN IBSS group keys. This
1907                  * could be optimized in the future to use a modified key cache
1908                  * design to support per-STA RX GTK, but until that gets
1909                  * implemented, use of software crypto for group addressed
1910                  * frames is a acceptable to allow RSN IBSS to be used.
1911                  */
1912                 return -EOPNOTSUPP;
1913         }
1914
1915         mutex_lock(&sc->mutex);
1916         ath9k_ps_wakeup(sc);
1917         ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1918
1919         switch (cmd) {
1920         case SET_KEY:
1921                 if (sta)
1922                         ath9k_del_ps_key(sc, vif, sta);
1923
1924                 ret = ath_key_config(common, vif, sta, key);
1925                 if (ret >= 0) {
1926                         key->hw_key_idx = ret;
1927                         /* push IV and Michael MIC generation to stack */
1928                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1929                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1930                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1931                         if (sc->sc_ah->sw_mgmt_crypto &&
1932                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1933                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1934                         ret = 0;
1935                 }
1936                 break;
1937         case DISABLE_KEY:
1938                 ath_key_delete(common, key);
1939                 break;
1940         default:
1941                 ret = -EINVAL;
1942         }
1943
1944         ath9k_ps_restore(sc);
1945         mutex_unlock(&sc->mutex);
1946
1947         return ret;
1948 }
1949 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1950 {
1951         struct ath_softc *sc = data;
1952         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1953         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1954         struct ath_vif *avp = (void *)vif->drv_priv;
1955
1956         /*
1957          * Skip iteration if primary station vif's bss info
1958          * was not changed
1959          */
1960         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1961                 return;
1962
1963         if (bss_conf->assoc) {
1964                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1965                 avp->primary_sta_vif = true;
1966                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1967                 common->curaid = bss_conf->aid;
1968                 ath9k_hw_write_associd(sc->sc_ah);
1969                 ath_dbg(common, ATH_DBG_CONFIG,
1970                                 "Bss Info ASSOC %d, bssid: %pM\n",
1971                                 bss_conf->aid, common->curbssid);
1972                 ath_beacon_config(sc, vif);
1973                 /*
1974                  * Request a re-configuration of Beacon related timers
1975                  * on the receipt of the first Beacon frame (i.e.,
1976                  * after time sync with the AP).
1977                  */
1978                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1979                 /* Reset rssi stats */
1980                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1981                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1982
1983                 if (!common->disable_ani) {
1984                         sc->sc_flags |= SC_OP_ANI_RUN;
1985                         ath_start_ani(common);
1986                 }
1987
1988         }
1989 }
1990
1991 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
1992 {
1993         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1994         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1995         struct ath_vif *avp = (void *)vif->drv_priv;
1996
1997         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1998                 return;
1999
2000         /* Reconfigure bss info */
2001         if (avp->primary_sta_vif && !bss_conf->assoc) {
2002                 ath_dbg(common, ATH_DBG_CONFIG,
2003                         "Bss Info DISASSOC %d, bssid %pM\n",
2004                         common->curaid, common->curbssid);
2005                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2006                 avp->primary_sta_vif = false;
2007                 memset(common->curbssid, 0, ETH_ALEN);
2008                 common->curaid = 0;
2009         }
2010
2011         ieee80211_iterate_active_interfaces_atomic(
2012                         sc->hw, ath9k_bss_iter, sc);
2013
2014         /*
2015          * None of station vifs are associated.
2016          * Clear bssid & aid
2017          */
2018         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2019                 ath9k_hw_write_associd(sc->sc_ah);
2020                 /* Stop ANI */
2021                 sc->sc_flags &= ~SC_OP_ANI_RUN;
2022                 del_timer_sync(&common->ani.timer);
2023                 memset(&sc->caldata, 0, sizeof(sc->caldata));
2024         }
2025 }
2026
2027 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2028                                    struct ieee80211_vif *vif,
2029                                    struct ieee80211_bss_conf *bss_conf,
2030                                    u32 changed)
2031 {
2032         struct ath_softc *sc = hw->priv;
2033         struct ath_hw *ah = sc->sc_ah;
2034         struct ath_common *common = ath9k_hw_common(ah);
2035         struct ath_vif *avp = (void *)vif->drv_priv;
2036         int slottime;
2037         int error;
2038
2039         ath9k_ps_wakeup(sc);
2040         mutex_lock(&sc->mutex);
2041
2042         if (changed & BSS_CHANGED_BSSID) {
2043                 ath9k_config_bss(sc, vif);
2044
2045                 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2046                         common->curbssid, common->curaid);
2047         }
2048
2049         if (changed & BSS_CHANGED_IBSS) {
2050                 /* There can be only one vif available */
2051                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2052                 common->curaid = bss_conf->aid;
2053                 ath9k_hw_write_associd(sc->sc_ah);
2054
2055                 if (bss_conf->ibss_joined) {
2056                         sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2057
2058                         if (!common->disable_ani) {
2059                                 sc->sc_flags |= SC_OP_ANI_RUN;
2060                                 ath_start_ani(common);
2061                         }
2062
2063                 } else {
2064                         sc->sc_flags &= ~SC_OP_ANI_RUN;
2065                         del_timer_sync(&common->ani.timer);
2066                 }
2067         }
2068
2069         /* Enable transmission of beacons (AP, IBSS, MESH) */
2070         if ((changed & BSS_CHANGED_BEACON) ||
2071             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2072                 ath9k_set_beaconing_status(sc, false);
2073                 error = ath_beacon_alloc(sc, vif);
2074                 if (!error)
2075                         ath_beacon_config(sc, vif);
2076                 ath9k_set_beaconing_status(sc, true);
2077         }
2078
2079         if (changed & BSS_CHANGED_ERP_SLOT) {
2080                 if (bss_conf->use_short_slot)
2081                         slottime = 9;
2082                 else
2083                         slottime = 20;
2084                 if (vif->type == NL80211_IFTYPE_AP) {
2085                         /*
2086                          * Defer update, so that connected stations can adjust
2087                          * their settings at the same time.
2088                          * See beacon.c for more details
2089                          */
2090                         sc->beacon.slottime = slottime;
2091                         sc->beacon.updateslot = UPDATE;
2092                 } else {
2093                         ah->slottime = slottime;
2094                         ath9k_hw_init_global_settings(ah);
2095                 }
2096         }
2097
2098         /* Disable transmission of beacons */
2099         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2100             !bss_conf->enable_beacon) {
2101                 ath9k_set_beaconing_status(sc, false);
2102                 avp->is_bslot_active = false;
2103                 ath9k_set_beaconing_status(sc, true);
2104         }
2105
2106         if (changed & BSS_CHANGED_BEACON_INT) {
2107                 /*
2108                  * In case of AP mode, the HW TSF has to be reset
2109                  * when the beacon interval changes.
2110                  */
2111                 if (vif->type == NL80211_IFTYPE_AP) {
2112                         sc->sc_flags |= SC_OP_TSF_RESET;
2113                         ath9k_set_beaconing_status(sc, false);
2114                         error = ath_beacon_alloc(sc, vif);
2115                         if (!error)
2116                                 ath_beacon_config(sc, vif);
2117                         ath9k_set_beaconing_status(sc, true);
2118                 } else
2119                         ath_beacon_config(sc, vif);
2120         }
2121
2122         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2123                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2124                         bss_conf->use_short_preamble);
2125                 if (bss_conf->use_short_preamble)
2126                         sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2127                 else
2128                         sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2129         }
2130
2131         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2132                 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2133                         bss_conf->use_cts_prot);
2134                 if (bss_conf->use_cts_prot &&
2135                     hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2136                         sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2137                 else
2138                         sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2139         }
2140
2141         mutex_unlock(&sc->mutex);
2142         ath9k_ps_restore(sc);
2143 }
2144
2145 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2146 {
2147         struct ath_softc *sc = hw->priv;
2148         u64 tsf;
2149
2150         mutex_lock(&sc->mutex);
2151         ath9k_ps_wakeup(sc);
2152         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2153         ath9k_ps_restore(sc);
2154         mutex_unlock(&sc->mutex);
2155
2156         return tsf;
2157 }
2158
2159 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2160                           struct ieee80211_vif *vif,
2161                           u64 tsf)
2162 {
2163         struct ath_softc *sc = hw->priv;
2164
2165         mutex_lock(&sc->mutex);
2166         ath9k_ps_wakeup(sc);
2167         ath9k_hw_settsf64(sc->sc_ah, tsf);
2168         ath9k_ps_restore(sc);
2169         mutex_unlock(&sc->mutex);
2170 }
2171
2172 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2173 {
2174         struct ath_softc *sc = hw->priv;
2175
2176         mutex_lock(&sc->mutex);
2177
2178         ath9k_ps_wakeup(sc);
2179         ath9k_hw_reset_tsf(sc->sc_ah);
2180         ath9k_ps_restore(sc);
2181
2182         mutex_unlock(&sc->mutex);
2183 }
2184
2185 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2186                               struct ieee80211_vif *vif,
2187                               enum ieee80211_ampdu_mlme_action action,
2188                               struct ieee80211_sta *sta,
2189                               u16 tid, u16 *ssn, u8 buf_size)
2190 {
2191         struct ath_softc *sc = hw->priv;
2192         int ret = 0;
2193
2194         local_bh_disable();
2195
2196         switch (action) {
2197         case IEEE80211_AMPDU_RX_START:
2198                 if (!(sc->sc_flags & SC_OP_RXAGGR))
2199                         ret = -ENOTSUPP;
2200                 break;
2201         case IEEE80211_AMPDU_RX_STOP:
2202                 break;
2203         case IEEE80211_AMPDU_TX_START:
2204                 if (!(sc->sc_flags & SC_OP_TXAGGR))
2205                         return -EOPNOTSUPP;
2206
2207                 ath9k_ps_wakeup(sc);
2208                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2209                 if (!ret)
2210                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2211                 ath9k_ps_restore(sc);
2212                 break;
2213         case IEEE80211_AMPDU_TX_STOP:
2214                 ath9k_ps_wakeup(sc);
2215                 ath_tx_aggr_stop(sc, sta, tid);
2216                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2217                 ath9k_ps_restore(sc);
2218                 break;
2219         case IEEE80211_AMPDU_TX_OPERATIONAL:
2220                 ath9k_ps_wakeup(sc);
2221                 ath_tx_aggr_resume(sc, sta, tid);
2222                 ath9k_ps_restore(sc);
2223                 break;
2224         default:
2225                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2226         }
2227
2228         local_bh_enable();
2229
2230         return ret;
2231 }
2232
2233 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2234                              struct survey_info *survey)
2235 {
2236         struct ath_softc *sc = hw->priv;
2237         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2238         struct ieee80211_supported_band *sband;
2239         struct ieee80211_channel *chan;
2240         unsigned long flags;
2241         int pos;
2242
2243         spin_lock_irqsave(&common->cc_lock, flags);
2244         if (idx == 0)
2245                 ath_update_survey_stats(sc);
2246
2247         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2248         if (sband && idx >= sband->n_channels) {
2249                 idx -= sband->n_channels;
2250                 sband = NULL;
2251         }
2252
2253         if (!sband)
2254                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2255
2256         if (!sband || idx >= sband->n_channels) {
2257                 spin_unlock_irqrestore(&common->cc_lock, flags);
2258                 return -ENOENT;
2259         }
2260
2261         chan = &sband->channels[idx];
2262         pos = chan->hw_value;
2263         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2264         survey->channel = chan;
2265         spin_unlock_irqrestore(&common->cc_lock, flags);
2266
2267         return 0;
2268 }
2269
2270 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2271 {
2272         struct ath_softc *sc = hw->priv;
2273         struct ath_hw *ah = sc->sc_ah;
2274
2275         mutex_lock(&sc->mutex);
2276         ah->coverage_class = coverage_class;
2277
2278         ath9k_ps_wakeup(sc);
2279         ath9k_hw_init_global_settings(ah);
2280         ath9k_ps_restore(sc);
2281
2282         mutex_unlock(&sc->mutex);
2283 }
2284
2285 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2286 {
2287         struct ath_softc *sc = hw->priv;
2288         struct ath_hw *ah = sc->sc_ah;
2289         struct ath_common *common = ath9k_hw_common(ah);
2290         int timeout = 200; /* ms */
2291         int i, j;
2292         bool drain_txq;
2293
2294         mutex_lock(&sc->mutex);
2295         cancel_delayed_work_sync(&sc->tx_complete_work);
2296
2297         if (ah->ah_flags & AH_UNPLUGGED) {
2298                 ath_dbg(common, ATH_DBG_ANY, "Device has been unplugged!\n");
2299                 mutex_unlock(&sc->mutex);
2300                 return;
2301         }
2302
2303         if (sc->sc_flags & SC_OP_INVALID) {
2304                 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2305                 mutex_unlock(&sc->mutex);
2306                 return;
2307         }
2308
2309         if (drop)
2310                 timeout = 1;
2311
2312         for (j = 0; j < timeout; j++) {
2313                 bool npend = false;
2314
2315                 if (j)
2316                         usleep_range(1000, 2000);
2317
2318                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2319                         if (!ATH_TXQ_SETUP(sc, i))
2320                                 continue;
2321
2322                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2323
2324                         if (npend)
2325                                 break;
2326                 }
2327
2328                 if (!npend)
2329                     goto out;
2330         }
2331
2332         ath9k_ps_wakeup(sc);
2333         spin_lock_bh(&sc->sc_pcu_lock);
2334         drain_txq = ath_drain_all_txq(sc, false);
2335         spin_unlock_bh(&sc->sc_pcu_lock);
2336
2337         if (!drain_txq)
2338                 ath_reset(sc, false);
2339
2340         ath9k_ps_restore(sc);
2341         ieee80211_wake_queues(hw);
2342
2343 out:
2344         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2345         mutex_unlock(&sc->mutex);
2346 }
2347
2348 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2349 {
2350         struct ath_softc *sc = hw->priv;
2351         int i;
2352
2353         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2354                 if (!ATH_TXQ_SETUP(sc, i))
2355                         continue;
2356
2357                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2358                         return true;
2359         }
2360         return false;
2361 }
2362
2363 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2364 {
2365         struct ath_softc *sc = hw->priv;
2366         struct ath_hw *ah = sc->sc_ah;
2367         struct ieee80211_vif *vif;
2368         struct ath_vif *avp;
2369         struct ath_buf *bf;
2370         struct ath_tx_status ts;
2371         int status;
2372
2373         vif = sc->beacon.bslot[0];
2374         if (!vif)
2375                 return 0;
2376
2377         avp = (void *)vif->drv_priv;
2378         if (!avp->is_bslot_active)
2379                 return 0;
2380
2381         if (!sc->beacon.tx_processed) {
2382                 tasklet_disable(&sc->bcon_tasklet);
2383
2384                 bf = avp->av_bcbuf;
2385                 if (!bf || !bf->bf_mpdu)
2386                         goto skip;
2387
2388                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2389                 if (status == -EINPROGRESS)
2390                         goto skip;
2391
2392                 sc->beacon.tx_processed = true;
2393                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2394
2395 skip:
2396                 tasklet_enable(&sc->bcon_tasklet);
2397         }
2398
2399         return sc->beacon.tx_last;
2400 }
2401
2402 static int ath9k_get_stats(struct ieee80211_hw *hw,
2403                            struct ieee80211_low_level_stats *stats)
2404 {
2405         struct ath_softc *sc = hw->priv;
2406         struct ath_hw *ah = sc->sc_ah;
2407         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2408
2409         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2410         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2411         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2412         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2413         return 0;
2414 }
2415
2416 static u32 fill_chainmask(u32 cap, u32 new)
2417 {
2418         u32 filled = 0;
2419         int i;
2420
2421         for (i = 0; cap && new; i++, cap >>= 1) {
2422                 if (!(cap & BIT(0)))
2423                         continue;
2424
2425                 if (new & BIT(0))
2426                         filled |= BIT(i);
2427
2428                 new >>= 1;
2429         }
2430
2431         return filled;
2432 }
2433
2434 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2435 {
2436         struct ath_softc *sc = hw->priv;
2437         struct ath_hw *ah = sc->sc_ah;
2438
2439         if (!rx_ant || !tx_ant)
2440                 return -EINVAL;
2441
2442         sc->ant_rx = rx_ant;
2443         sc->ant_tx = tx_ant;
2444
2445         if (ah->caps.rx_chainmask == 1)
2446                 return 0;
2447
2448         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2449         if (AR_SREV_9100(ah))
2450                 ah->rxchainmask = 0x7;
2451         else
2452                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2453
2454         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2455         ath9k_reload_chainmask_settings(sc);
2456
2457         return 0;
2458 }
2459
2460 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2461 {
2462         struct ath_softc *sc = hw->priv;
2463
2464         *tx_ant = sc->ant_tx;
2465         *rx_ant = sc->ant_rx;
2466         return 0;
2467 }
2468
2469 struct ieee80211_ops ath9k_ops = {
2470         .tx                 = ath9k_tx,
2471         .start              = ath9k_start,
2472         .stop               = ath9k_stop,
2473         .add_interface      = ath9k_add_interface,
2474         .change_interface   = ath9k_change_interface,
2475         .remove_interface   = ath9k_remove_interface,
2476         .config             = ath9k_config,
2477         .configure_filter   = ath9k_configure_filter,
2478         .sta_add            = ath9k_sta_add,
2479         .sta_remove         = ath9k_sta_remove,
2480         .sta_notify         = ath9k_sta_notify,
2481         .conf_tx            = ath9k_conf_tx,
2482         .bss_info_changed   = ath9k_bss_info_changed,
2483         .set_key            = ath9k_set_key,
2484         .get_tsf            = ath9k_get_tsf,
2485         .set_tsf            = ath9k_set_tsf,
2486         .reset_tsf          = ath9k_reset_tsf,
2487         .ampdu_action       = ath9k_ampdu_action,
2488         .get_survey         = ath9k_get_survey,
2489         .rfkill_poll        = ath9k_rfkill_poll_state,
2490         .set_coverage_class = ath9k_set_coverage_class,
2491         .flush              = ath9k_flush,
2492         .tx_frames_pending  = ath9k_tx_frames_pending,
2493         .tx_last_beacon     = ath9k_tx_last_beacon,
2494         .get_stats          = ath9k_get_stats,
2495         .set_antenna        = ath9k_set_antenna,
2496         .get_antenna        = ath9k_get_antenna,
2497 };