OSDN Git Service

ARM: OMAP2xxx: hwmod data: start to fix the IVA1, IVA2 and DSP
[uclinux-h8/linux.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_flags & PS_WAIT_FOR_TX_ACK)
122                 goto unlock;
123
124         if (sc->ps_idle)
125                 mode = ATH9K_PM_FULL_SLEEP;
126         else if (sc->ps_enabled &&
127                  !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
128                               PS_WAIT_FOR_CAB |
129                               PS_WAIT_FOR_PSPOLL_DATA)))
130                 mode = ATH9K_PM_NETWORK_SLEEP;
131         else
132                 goto unlock;
133
134         spin_lock(&common->cc_lock);
135         ath_hw_cycle_counters_update(common);
136         spin_unlock(&common->cc_lock);
137
138         ath9k_hw_setpower(sc->sc_ah, mode);
139
140  unlock:
141         spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
142 }
143
144 void ath_start_ani(struct ath_common *common)
145 {
146         struct ath_hw *ah = common->ah;
147         unsigned long timestamp = jiffies_to_msecs(jiffies);
148         struct ath_softc *sc = (struct ath_softc *) common->priv;
149
150         if (!(sc->sc_flags & SC_OP_ANI_RUN))
151                 return;
152
153         if (sc->sc_flags & SC_OP_OFFCHANNEL)
154                 return;
155
156         common->ani.longcal_timer = timestamp;
157         common->ani.shortcal_timer = timestamp;
158         common->ani.checkani_timer = timestamp;
159
160         mod_timer(&common->ani.timer,
161                   jiffies +
162                         msecs_to_jiffies((u32)ah->config.ani_poll_interval));
163 }
164
165 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
166 {
167         struct ath_hw *ah = sc->sc_ah;
168         struct ath9k_channel *chan = &ah->channels[channel];
169         struct survey_info *survey = &sc->survey[channel];
170
171         if (chan->noisefloor) {
172                 survey->filled |= SURVEY_INFO_NOISE_DBM;
173                 survey->noise = ath9k_hw_getchan_noise(ah, chan);
174         }
175 }
176
177 /*
178  * Updates the survey statistics and returns the busy time since last
179  * update in %, if the measurement duration was long enough for the
180  * result to be useful, -1 otherwise.
181  */
182 static int ath_update_survey_stats(struct ath_softc *sc)
183 {
184         struct ath_hw *ah = sc->sc_ah;
185         struct ath_common *common = ath9k_hw_common(ah);
186         int pos = ah->curchan - &ah->channels[0];
187         struct survey_info *survey = &sc->survey[pos];
188         struct ath_cycle_counters *cc = &common->cc_survey;
189         unsigned int div = common->clockrate * 1000;
190         int ret = 0;
191
192         if (!ah->curchan)
193                 return -1;
194
195         if (ah->power_mode == ATH9K_PM_AWAKE)
196                 ath_hw_cycle_counters_update(common);
197
198         if (cc->cycles > 0) {
199                 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
200                         SURVEY_INFO_CHANNEL_TIME_BUSY |
201                         SURVEY_INFO_CHANNEL_TIME_RX |
202                         SURVEY_INFO_CHANNEL_TIME_TX;
203                 survey->channel_time += cc->cycles / div;
204                 survey->channel_time_busy += cc->rx_busy / div;
205                 survey->channel_time_rx += cc->rx_frame / div;
206                 survey->channel_time_tx += cc->tx_frame / div;
207         }
208
209         if (cc->cycles < div)
210                 return -1;
211
212         if (cc->cycles > 0)
213                 ret = cc->rx_busy * 100 / cc->cycles;
214
215         memset(cc, 0, sizeof(*cc));
216
217         ath_update_survey_nf(sc, pos);
218
219         return ret;
220 }
221
222 static void __ath_cancel_work(struct ath_softc *sc)
223 {
224         cancel_work_sync(&sc->paprd_work);
225         cancel_work_sync(&sc->hw_check_work);
226         cancel_delayed_work_sync(&sc->tx_complete_work);
227         cancel_delayed_work_sync(&sc->hw_pll_work);
228 }
229
230 static void ath_cancel_work(struct ath_softc *sc)
231 {
232         __ath_cancel_work(sc);
233         cancel_work_sync(&sc->hw_reset_work);
234 }
235
236 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
237 {
238         struct ath_hw *ah = sc->sc_ah;
239         struct ath_common *common = ath9k_hw_common(ah);
240         bool ret;
241
242         ieee80211_stop_queues(sc->hw);
243
244         sc->hw_busy_count = 0;
245         del_timer_sync(&common->ani.timer);
246
247         ath9k_debug_samp_bb_mac(sc);
248         ath9k_hw_disable_interrupts(ah);
249
250         ret = ath_drain_all_txq(sc, retry_tx);
251
252         if (!ath_stoprecv(sc))
253                 ret = false;
254
255         if (!flush) {
256                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
257                         ath_rx_tasklet(sc, 1, true);
258                 ath_rx_tasklet(sc, 1, false);
259         } else {
260                 ath_flushrecv(sc);
261         }
262
263         return ret;
264 }
265
266 static bool ath_complete_reset(struct ath_softc *sc, bool start)
267 {
268         struct ath_hw *ah = sc->sc_ah;
269         struct ath_common *common = ath9k_hw_common(ah);
270
271         if (ath_startrecv(sc) != 0) {
272                 ath_err(common, "Unable to restart recv logic\n");
273                 return false;
274         }
275
276         ath9k_cmn_update_txpow(ah, sc->curtxpow,
277                                sc->config.txpowlimit, &sc->curtxpow);
278         ath9k_hw_set_interrupts(ah);
279         ath9k_hw_enable_interrupts(ah);
280
281         if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) {
282                 if (sc->sc_flags & SC_OP_BEACONS)
283                         ath_set_beacon(sc);
284
285                 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
286                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
287                 if (!common->disable_ani)
288                         ath_start_ani(common);
289         }
290
291         if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3) {
292                 struct ath_hw_antcomb_conf div_ant_conf;
293                 u8 lna_conf;
294
295                 ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf);
296
297                 if (sc->ant_rx == 1)
298                         lna_conf = ATH_ANT_DIV_COMB_LNA1;
299                 else
300                         lna_conf = ATH_ANT_DIV_COMB_LNA2;
301                 div_ant_conf.main_lna_conf = lna_conf;
302                 div_ant_conf.alt_lna_conf = lna_conf;
303
304                 ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf);
305         }
306
307         ieee80211_wake_queues(sc->hw);
308
309         return true;
310 }
311
312 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
313                               bool retry_tx)
314 {
315         struct ath_hw *ah = sc->sc_ah;
316         struct ath_common *common = ath9k_hw_common(ah);
317         struct ath9k_hw_cal_data *caldata = NULL;
318         bool fastcc = true;
319         bool flush = false;
320         int r;
321
322         __ath_cancel_work(sc);
323
324         spin_lock_bh(&sc->sc_pcu_lock);
325
326         if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) {
327                 fastcc = false;
328                 caldata = &sc->caldata;
329         }
330
331         if (!hchan) {
332                 fastcc = false;
333                 flush = true;
334                 hchan = ah->curchan;
335         }
336
337         if (!ath_prepare_reset(sc, retry_tx, flush))
338                 fastcc = false;
339
340         ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
341                 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
342
343         r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
344         if (r) {
345                 ath_err(common,
346                         "Unable to reset channel, reset status %d\n", r);
347                 goto out;
348         }
349
350         if (!ath_complete_reset(sc, true))
351                 r = -EIO;
352
353 out:
354         spin_unlock_bh(&sc->sc_pcu_lock);
355         return r;
356 }
357
358
359 /*
360  * Set/change channels.  If the channel is really being changed, it's done
361  * by reseting the chip.  To accomplish this we must first cleanup any pending
362  * DMA, then restart stuff.
363 */
364 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
365                     struct ath9k_channel *hchan)
366 {
367         int r;
368
369         if (sc->sc_flags & SC_OP_INVALID)
370                 return -EIO;
371
372         r = ath_reset_internal(sc, hchan, false);
373
374         return r;
375 }
376
377 static void ath_paprd_activate(struct ath_softc *sc)
378 {
379         struct ath_hw *ah = sc->sc_ah;
380         struct ath9k_hw_cal_data *caldata = ah->caldata;
381         int chain;
382
383         if (!caldata || !caldata->paprd_done)
384                 return;
385
386         ath9k_ps_wakeup(sc);
387         ar9003_paprd_enable(ah, false);
388         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
389                 if (!(ah->txchainmask & BIT(chain)))
390                         continue;
391
392                 ar9003_paprd_populate_single_table(ah, caldata, chain);
393         }
394
395         ar9003_paprd_enable(ah, true);
396         ath9k_ps_restore(sc);
397 }
398
399 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
400 {
401         struct ieee80211_hw *hw = sc->hw;
402         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
403         struct ath_hw *ah = sc->sc_ah;
404         struct ath_common *common = ath9k_hw_common(ah);
405         struct ath_tx_control txctl;
406         int time_left;
407
408         memset(&txctl, 0, sizeof(txctl));
409         txctl.txq = sc->tx.txq_map[WME_AC_BE];
410
411         memset(tx_info, 0, sizeof(*tx_info));
412         tx_info->band = hw->conf.channel->band;
413         tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
414         tx_info->control.rates[0].idx = 0;
415         tx_info->control.rates[0].count = 1;
416         tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
417         tx_info->control.rates[1].idx = -1;
418
419         init_completion(&sc->paprd_complete);
420         txctl.paprd = BIT(chain);
421
422         if (ath_tx_start(hw, skb, &txctl) != 0) {
423                 ath_dbg(common, CALIBRATE, "PAPRD TX failed\n");
424                 dev_kfree_skb_any(skb);
425                 return false;
426         }
427
428         time_left = wait_for_completion_timeout(&sc->paprd_complete,
429                         msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
430
431         if (!time_left)
432                 ath_dbg(common, CALIBRATE,
433                         "Timeout waiting for paprd training on TX chain %d\n",
434                         chain);
435
436         return !!time_left;
437 }
438
439 void ath_paprd_calibrate(struct work_struct *work)
440 {
441         struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
442         struct ieee80211_hw *hw = sc->hw;
443         struct ath_hw *ah = sc->sc_ah;
444         struct ieee80211_hdr *hdr;
445         struct sk_buff *skb = NULL;
446         struct ath9k_hw_cal_data *caldata = ah->caldata;
447         struct ath_common *common = ath9k_hw_common(ah);
448         int ftype;
449         int chain_ok = 0;
450         int chain;
451         int len = 1800;
452
453         if (!caldata)
454                 return;
455
456         ath9k_ps_wakeup(sc);
457
458         if (ar9003_paprd_init_table(ah) < 0)
459                 goto fail_paprd;
460
461         skb = alloc_skb(len, GFP_KERNEL);
462         if (!skb)
463                 goto fail_paprd;
464
465         skb_put(skb, len);
466         memset(skb->data, 0, len);
467         hdr = (struct ieee80211_hdr *)skb->data;
468         ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
469         hdr->frame_control = cpu_to_le16(ftype);
470         hdr->duration_id = cpu_to_le16(10);
471         memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
472         memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
473         memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
474
475         for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
476                 if (!(ah->txchainmask & BIT(chain)))
477                         continue;
478
479                 chain_ok = 0;
480
481                 ath_dbg(common, CALIBRATE,
482                         "Sending PAPRD frame for thermal measurement on chain %d\n",
483                         chain);
484                 if (!ath_paprd_send_frame(sc, skb, chain))
485                         goto fail_paprd;
486
487                 ar9003_paprd_setup_gain_table(ah, chain);
488
489                 ath_dbg(common, CALIBRATE,
490                         "Sending PAPRD training frame on chain %d\n", chain);
491                 if (!ath_paprd_send_frame(sc, skb, chain))
492                         goto fail_paprd;
493
494                 if (!ar9003_paprd_is_done(ah)) {
495                         ath_dbg(common, CALIBRATE,
496                                 "PAPRD not yet done on chain %d\n", chain);
497                         break;
498                 }
499
500                 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
501                         ath_dbg(common, CALIBRATE,
502                                 "PAPRD create curve failed on chain %d\n",
503                                                                    chain);
504                         break;
505                 }
506
507                 chain_ok = 1;
508         }
509         kfree_skb(skb);
510
511         if (chain_ok) {
512                 caldata->paprd_done = true;
513                 ath_paprd_activate(sc);
514         }
515
516 fail_paprd:
517         ath9k_ps_restore(sc);
518 }
519
520 /*
521  *  This routine performs the periodic noise floor calibration function
522  *  that is used to adjust and optimize the chip performance.  This
523  *  takes environmental changes (location, temperature) into account.
524  *  When the task is complete, it reschedules itself depending on the
525  *  appropriate interval that was calculated.
526  */
527 void ath_ani_calibrate(unsigned long data)
528 {
529         struct ath_softc *sc = (struct ath_softc *)data;
530         struct ath_hw *ah = sc->sc_ah;
531         struct ath_common *common = ath9k_hw_common(ah);
532         bool longcal = false;
533         bool shortcal = false;
534         bool aniflag = false;
535         unsigned int timestamp = jiffies_to_msecs(jiffies);
536         u32 cal_interval, short_cal_interval, long_cal_interval;
537         unsigned long flags;
538
539         if (ah->caldata && ah->caldata->nfcal_interference)
540                 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
541         else
542                 long_cal_interval = ATH_LONG_CALINTERVAL;
543
544         short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
545                 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
546
547         /* Only calibrate if awake */
548         if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
549                 goto set_timer;
550
551         ath9k_ps_wakeup(sc);
552
553         /* Long calibration runs independently of short calibration. */
554         if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
555                 longcal = true;
556                 common->ani.longcal_timer = timestamp;
557         }
558
559         /* Short calibration applies only while caldone is false */
560         if (!common->ani.caldone) {
561                 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
562                         shortcal = true;
563                         common->ani.shortcal_timer = timestamp;
564                         common->ani.resetcal_timer = timestamp;
565                 }
566         } else {
567                 if ((timestamp - common->ani.resetcal_timer) >=
568                     ATH_RESTART_CALINTERVAL) {
569                         common->ani.caldone = ath9k_hw_reset_calvalid(ah);
570                         if (common->ani.caldone)
571                                 common->ani.resetcal_timer = timestamp;
572                 }
573         }
574
575         /* Verify whether we must check ANI */
576         if (sc->sc_ah->config.enable_ani
577             && (timestamp - common->ani.checkani_timer) >=
578             ah->config.ani_poll_interval) {
579                 aniflag = true;
580                 common->ani.checkani_timer = timestamp;
581         }
582
583         /* Call ANI routine if necessary */
584         if (aniflag) {
585                 spin_lock_irqsave(&common->cc_lock, flags);
586                 ath9k_hw_ani_monitor(ah, ah->curchan);
587                 ath_update_survey_stats(sc);
588                 spin_unlock_irqrestore(&common->cc_lock, flags);
589         }
590
591         /* Perform calibration if necessary */
592         if (longcal || shortcal) {
593                 common->ani.caldone =
594                         ath9k_hw_calibrate(ah, ah->curchan,
595                                                 ah->rxchainmask, longcal);
596         }
597
598         ath_dbg(common, ANI,
599                 "Calibration @%lu finished: %s %s %s, caldone: %s\n",
600                 jiffies,
601                 longcal ? "long" : "", shortcal ? "short" : "",
602                 aniflag ? "ani" : "", common->ani.caldone ? "true" : "false");
603
604         ath9k_ps_restore(sc);
605
606 set_timer:
607         /*
608         * Set timer interval based on previous results.
609         * The interval must be the shortest necessary to satisfy ANI,
610         * short calibration and long calibration.
611         */
612         ath9k_debug_samp_bb_mac(sc);
613         cal_interval = ATH_LONG_CALINTERVAL;
614         if (sc->sc_ah->config.enable_ani)
615                 cal_interval = min(cal_interval,
616                                    (u32)ah->config.ani_poll_interval);
617         if (!common->ani.caldone)
618                 cal_interval = min(cal_interval, (u32)short_cal_interval);
619
620         mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
621         if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
622                 if (!ah->caldata->paprd_done)
623                         ieee80211_queue_work(sc->hw, &sc->paprd_work);
624                 else if (!ah->paprd_table_write_done)
625                         ath_paprd_activate(sc);
626         }
627 }
628
629 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
630                             struct ieee80211_vif *vif)
631 {
632         struct ath_node *an;
633         an = (struct ath_node *)sta->drv_priv;
634
635 #ifdef CONFIG_ATH9K_DEBUGFS
636         spin_lock(&sc->nodes_lock);
637         list_add(&an->list, &sc->nodes);
638         spin_unlock(&sc->nodes_lock);
639 #endif
640         an->sta = sta;
641         an->vif = vif;
642
643         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
644                 ath_tx_node_init(sc, an);
645                 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
646                                      sta->ht_cap.ampdu_factor);
647                 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
648         }
649 }
650
651 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
652 {
653         struct ath_node *an = (struct ath_node *)sta->drv_priv;
654
655 #ifdef CONFIG_ATH9K_DEBUGFS
656         spin_lock(&sc->nodes_lock);
657         list_del(&an->list);
658         spin_unlock(&sc->nodes_lock);
659         an->sta = NULL;
660 #endif
661
662         if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
663                 ath_tx_node_cleanup(sc, an);
664 }
665
666
667 void ath9k_tasklet(unsigned long data)
668 {
669         struct ath_softc *sc = (struct ath_softc *)data;
670         struct ath_hw *ah = sc->sc_ah;
671         struct ath_common *common = ath9k_hw_common(ah);
672
673         u32 status = sc->intrstatus;
674         u32 rxmask;
675
676         ath9k_ps_wakeup(sc);
677         spin_lock(&sc->sc_pcu_lock);
678
679         if ((status & ATH9K_INT_FATAL) ||
680             (status & ATH9K_INT_BB_WATCHDOG)) {
681 #ifdef CONFIG_ATH9K_DEBUGFS
682                 enum ath_reset_type type;
683
684                 if (status & ATH9K_INT_FATAL)
685                         type = RESET_TYPE_FATAL_INT;
686                 else
687                         type = RESET_TYPE_BB_WATCHDOG;
688
689                 RESET_STAT_INC(sc, type);
690 #endif
691                 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
692                 goto out;
693         }
694
695         /*
696          * Only run the baseband hang check if beacons stop working in AP or
697          * IBSS mode, because it has a high false positive rate. For station
698          * mode it should not be necessary, since the upper layers will detect
699          * this through a beacon miss automatically and the following channel
700          * change will trigger a hardware reset anyway
701          */
702         if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
703             !ath9k_hw_check_alive(ah))
704                 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
705
706         if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
707                 /*
708                  * TSF sync does not look correct; remain awake to sync with
709                  * the next Beacon.
710                  */
711                 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
712                 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
713         }
714
715         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
716                 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
717                           ATH9K_INT_RXORN);
718         else
719                 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
720
721         if (status & rxmask) {
722                 /* Check for high priority Rx first */
723                 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
724                     (status & ATH9K_INT_RXHP))
725                         ath_rx_tasklet(sc, 0, true);
726
727                 ath_rx_tasklet(sc, 0, false);
728         }
729
730         if (status & ATH9K_INT_TX) {
731                 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
732                         ath_tx_edma_tasklet(sc);
733                 else
734                         ath_tx_tasklet(sc);
735         }
736
737         ath9k_btcoex_handle_interrupt(sc, status);
738
739 out:
740         /* re-enable hardware interrupt */
741         ath9k_hw_enable_interrupts(ah);
742
743         spin_unlock(&sc->sc_pcu_lock);
744         ath9k_ps_restore(sc);
745 }
746
747 irqreturn_t ath_isr(int irq, void *dev)
748 {
749 #define SCHED_INTR (                            \
750                 ATH9K_INT_FATAL |               \
751                 ATH9K_INT_BB_WATCHDOG |         \
752                 ATH9K_INT_RXORN |               \
753                 ATH9K_INT_RXEOL |               \
754                 ATH9K_INT_RX |                  \
755                 ATH9K_INT_RXLP |                \
756                 ATH9K_INT_RXHP |                \
757                 ATH9K_INT_TX |                  \
758                 ATH9K_INT_BMISS |               \
759                 ATH9K_INT_CST |                 \
760                 ATH9K_INT_TSFOOR |              \
761                 ATH9K_INT_GENTIMER |            \
762                 ATH9K_INT_MCI)
763
764         struct ath_softc *sc = dev;
765         struct ath_hw *ah = sc->sc_ah;
766         struct ath_common *common = ath9k_hw_common(ah);
767         enum ath9k_int status;
768         bool sched = false;
769
770         /*
771          * The hardware is not ready/present, don't
772          * touch anything. Note this can happen early
773          * on if the IRQ is shared.
774          */
775         if (sc->sc_flags & SC_OP_INVALID)
776                 return IRQ_NONE;
777
778
779         /* shared irq, not for us */
780
781         if (!ath9k_hw_intrpend(ah))
782                 return IRQ_NONE;
783
784         /*
785          * Figure out the reason(s) for the interrupt.  Note
786          * that the hal returns a pseudo-ISR that may include
787          * bits we haven't explicitly enabled so we mask the
788          * value to insure we only process bits we requested.
789          */
790         ath9k_hw_getisr(ah, &status);   /* NB: clears ISR too */
791         status &= ah->imask;    /* discard unasked-for bits */
792
793         /*
794          * If there are no status bits set, then this interrupt was not
795          * for me (should have been caught above).
796          */
797         if (!status)
798                 return IRQ_NONE;
799
800         /* Cache the status */
801         sc->intrstatus = status;
802
803         if (status & SCHED_INTR)
804                 sched = true;
805
806         /*
807          * If a FATAL or RXORN interrupt is received, we have to reset the
808          * chip immediately.
809          */
810         if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
811             !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
812                 goto chip_reset;
813
814         if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
815             (status & ATH9K_INT_BB_WATCHDOG)) {
816
817                 spin_lock(&common->cc_lock);
818                 ath_hw_cycle_counters_update(common);
819                 ar9003_hw_bb_watchdog_dbg_info(ah);
820                 spin_unlock(&common->cc_lock);
821
822                 goto chip_reset;
823         }
824
825         if (status & ATH9K_INT_SWBA)
826                 tasklet_schedule(&sc->bcon_tasklet);
827
828         if (status & ATH9K_INT_TXURN)
829                 ath9k_hw_updatetxtriglevel(ah, true);
830
831         if (status & ATH9K_INT_RXEOL) {
832                 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
833                 ath9k_hw_set_interrupts(ah);
834         }
835
836         if (status & ATH9K_INT_MIB) {
837                 /*
838                  * Disable interrupts until we service the MIB
839                  * interrupt; otherwise it will continue to
840                  * fire.
841                  */
842                 ath9k_hw_disable_interrupts(ah);
843                 /*
844                  * Let the hal handle the event. We assume
845                  * it will clear whatever condition caused
846                  * the interrupt.
847                  */
848                 spin_lock(&common->cc_lock);
849                 ath9k_hw_proc_mib_event(ah);
850                 spin_unlock(&common->cc_lock);
851                 ath9k_hw_enable_interrupts(ah);
852         }
853
854         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
855                 if (status & ATH9K_INT_TIM_TIMER) {
856                         if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
857                                 goto chip_reset;
858                         /* Clear RxAbort bit so that we can
859                          * receive frames */
860                         ath9k_setpower(sc, ATH9K_PM_AWAKE);
861                         ath9k_hw_setrxabort(sc->sc_ah, 0);
862                         sc->ps_flags |= PS_WAIT_FOR_BEACON;
863                 }
864
865 chip_reset:
866
867         ath_debug_stat_interrupt(sc, status);
868
869         if (sched) {
870                 /* turn off every interrupt */
871                 ath9k_hw_disable_interrupts(ah);
872                 tasklet_schedule(&sc->intr_tq);
873         }
874
875         return IRQ_HANDLED;
876
877 #undef SCHED_INTR
878 }
879
880 static int ath_reset(struct ath_softc *sc, bool retry_tx)
881 {
882         int r;
883
884         ath9k_ps_wakeup(sc);
885
886         r = ath_reset_internal(sc, NULL, retry_tx);
887
888         if (retry_tx) {
889                 int i;
890                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
891                         if (ATH_TXQ_SETUP(sc, i)) {
892                                 spin_lock_bh(&sc->tx.txq[i].axq_lock);
893                                 ath_txq_schedule(sc, &sc->tx.txq[i]);
894                                 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
895                         }
896                 }
897         }
898
899         ath9k_ps_restore(sc);
900
901         return r;
902 }
903
904 void ath_reset_work(struct work_struct *work)
905 {
906         struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
907
908         ath_reset(sc, true);
909 }
910
911 void ath_hw_check(struct work_struct *work)
912 {
913         struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
914         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
915         unsigned long flags;
916         int busy;
917
918         ath9k_ps_wakeup(sc);
919         if (ath9k_hw_check_alive(sc->sc_ah))
920                 goto out;
921
922         spin_lock_irqsave(&common->cc_lock, flags);
923         busy = ath_update_survey_stats(sc);
924         spin_unlock_irqrestore(&common->cc_lock, flags);
925
926         ath_dbg(common, RESET, "Possible baseband hang, busy=%d (try %d)\n",
927                 busy, sc->hw_busy_count + 1);
928         if (busy >= 99) {
929                 if (++sc->hw_busy_count >= 3) {
930                         RESET_STAT_INC(sc, RESET_TYPE_BB_HANG);
931                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
932                 }
933
934         } else if (busy >= 0)
935                 sc->hw_busy_count = 0;
936
937 out:
938         ath9k_ps_restore(sc);
939 }
940
941 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
942 {
943         static int count;
944         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
945
946         if (pll_sqsum >= 0x40000) {
947                 count++;
948                 if (count == 3) {
949                         /* Rx is hung for more than 500ms. Reset it */
950                         ath_dbg(common, RESET, "Possible RX hang, resetting\n");
951                         RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG);
952                         ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
953                         count = 0;
954                 }
955         } else
956                 count = 0;
957 }
958
959 void ath_hw_pll_work(struct work_struct *work)
960 {
961         struct ath_softc *sc = container_of(work, struct ath_softc,
962                                             hw_pll_work.work);
963         u32 pll_sqsum;
964
965         if (AR_SREV_9485(sc->sc_ah)) {
966
967                 ath9k_ps_wakeup(sc);
968                 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
969                 ath9k_ps_restore(sc);
970
971                 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
972
973                 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
974         }
975 }
976
977 /**********************/
978 /* mac80211 callbacks */
979 /**********************/
980
981 static int ath9k_start(struct ieee80211_hw *hw)
982 {
983         struct ath_softc *sc = hw->priv;
984         struct ath_hw *ah = sc->sc_ah;
985         struct ath_common *common = ath9k_hw_common(ah);
986         struct ieee80211_channel *curchan = hw->conf.channel;
987         struct ath9k_channel *init_channel;
988         int r;
989
990         ath_dbg(common, CONFIG,
991                 "Starting driver with initial channel: %d MHz\n",
992                 curchan->center_freq);
993
994         ath9k_ps_wakeup(sc);
995         mutex_lock(&sc->mutex);
996
997         init_channel = ath9k_cmn_get_curchannel(hw, ah);
998
999         /* Reset SERDES registers */
1000         ath9k_hw_configpcipowersave(ah, false);
1001
1002         /*
1003          * The basic interface to setting the hardware in a good
1004          * state is ``reset''.  On return the hardware is known to
1005          * be powered up and with interrupts disabled.  This must
1006          * be followed by initialization of the appropriate bits
1007          * and then setup of the interrupt mask.
1008          */
1009         spin_lock_bh(&sc->sc_pcu_lock);
1010
1011         atomic_set(&ah->intr_ref_cnt, -1);
1012
1013         r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1014         if (r) {
1015                 ath_err(common,
1016                         "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1017                         r, curchan->center_freq);
1018                 spin_unlock_bh(&sc->sc_pcu_lock);
1019                 goto mutex_unlock;
1020         }
1021
1022         /* Setup our intr mask. */
1023         ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1024                     ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1025                     ATH9K_INT_GLOBAL;
1026
1027         if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1028                 ah->imask |= ATH9K_INT_RXHP |
1029                              ATH9K_INT_RXLP |
1030                              ATH9K_INT_BB_WATCHDOG;
1031         else
1032                 ah->imask |= ATH9K_INT_RX;
1033
1034         ah->imask |= ATH9K_INT_GTT;
1035
1036         if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1037                 ah->imask |= ATH9K_INT_CST;
1038
1039         if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
1040                 ah->imask |= ATH9K_INT_MCI;
1041
1042         sc->sc_flags &= ~SC_OP_INVALID;
1043         sc->sc_ah->is_monitoring = false;
1044
1045         if (!ath_complete_reset(sc, false)) {
1046                 r = -EIO;
1047                 spin_unlock_bh(&sc->sc_pcu_lock);
1048                 goto mutex_unlock;
1049         }
1050
1051         if (ah->led_pin >= 0) {
1052                 ath9k_hw_cfg_output(ah, ah->led_pin,
1053                                     AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
1054                 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
1055         }
1056
1057         /*
1058          * Reset key cache to sane defaults (all entries cleared) instead of
1059          * semi-random values after suspend/resume.
1060          */
1061         ath9k_cmn_init_crypto(sc->sc_ah);
1062
1063         spin_unlock_bh(&sc->sc_pcu_lock);
1064
1065         ath9k_start_btcoex(sc);
1066
1067         if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1068                 common->bus_ops->extn_synch_en(common);
1069
1070 mutex_unlock:
1071         mutex_unlock(&sc->mutex);
1072
1073         ath9k_ps_restore(sc);
1074
1075         return r;
1076 }
1077
1078 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1079 {
1080         struct ath_softc *sc = hw->priv;
1081         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1082         struct ath_tx_control txctl;
1083         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1084
1085         if (sc->ps_enabled) {
1086                 /*
1087                  * mac80211 does not set PM field for normal data frames, so we
1088                  * need to update that based on the current PS mode.
1089                  */
1090                 if (ieee80211_is_data(hdr->frame_control) &&
1091                     !ieee80211_is_nullfunc(hdr->frame_control) &&
1092                     !ieee80211_has_pm(hdr->frame_control)) {
1093                         ath_dbg(common, PS,
1094                                 "Add PM=1 for a TX frame while in PS mode\n");
1095                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1096                 }
1097         }
1098
1099         /*
1100          * Cannot tx while the hardware is in full sleep, it first needs a full
1101          * chip reset to recover from that
1102          */
1103         if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP))
1104                 goto exit;
1105
1106         if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1107                 /*
1108                  * We are using PS-Poll and mac80211 can request TX while in
1109                  * power save mode. Need to wake up hardware for the TX to be
1110                  * completed and if needed, also for RX of buffered frames.
1111                  */
1112                 ath9k_ps_wakeup(sc);
1113                 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1114                         ath9k_hw_setrxabort(sc->sc_ah, 0);
1115                 if (ieee80211_is_pspoll(hdr->frame_control)) {
1116                         ath_dbg(common, PS,
1117                                 "Sending PS-Poll to pick a buffered frame\n");
1118                         sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1119                 } else {
1120                         ath_dbg(common, PS, "Wake up to complete TX\n");
1121                         sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1122                 }
1123                 /*
1124                  * The actual restore operation will happen only after
1125                  * the sc_flags bit is cleared. We are just dropping
1126                  * the ps_usecount here.
1127                  */
1128                 ath9k_ps_restore(sc);
1129         }
1130
1131         memset(&txctl, 0, sizeof(struct ath_tx_control));
1132         txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1133
1134         ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
1135
1136         if (ath_tx_start(hw, skb, &txctl) != 0) {
1137                 ath_dbg(common, XMIT, "TX failed\n");
1138                 goto exit;
1139         }
1140
1141         return;
1142 exit:
1143         dev_kfree_skb_any(skb);
1144 }
1145
1146 static void ath9k_stop(struct ieee80211_hw *hw)
1147 {
1148         struct ath_softc *sc = hw->priv;
1149         struct ath_hw *ah = sc->sc_ah;
1150         struct ath_common *common = ath9k_hw_common(ah);
1151         bool prev_idle;
1152
1153         mutex_lock(&sc->mutex);
1154
1155         ath_cancel_work(sc);
1156
1157         if (sc->sc_flags & SC_OP_INVALID) {
1158                 ath_dbg(common, ANY, "Device not present\n");
1159                 mutex_unlock(&sc->mutex);
1160                 return;
1161         }
1162
1163         /* Ensure HW is awake when we try to shut it down. */
1164         ath9k_ps_wakeup(sc);
1165
1166         ath9k_stop_btcoex(sc);
1167
1168         spin_lock_bh(&sc->sc_pcu_lock);
1169
1170         /* prevent tasklets to enable interrupts once we disable them */
1171         ah->imask &= ~ATH9K_INT_GLOBAL;
1172
1173         /* make sure h/w will not generate any interrupt
1174          * before setting the invalid flag. */
1175         ath9k_hw_disable_interrupts(ah);
1176
1177         spin_unlock_bh(&sc->sc_pcu_lock);
1178
1179         /* we can now sync irq and kill any running tasklets, since we already
1180          * disabled interrupts and not holding a spin lock */
1181         synchronize_irq(sc->irq);
1182         tasklet_kill(&sc->intr_tq);
1183         tasklet_kill(&sc->bcon_tasklet);
1184
1185         prev_idle = sc->ps_idle;
1186         sc->ps_idle = true;
1187
1188         spin_lock_bh(&sc->sc_pcu_lock);
1189
1190         if (ah->led_pin >= 0) {
1191                 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
1192                 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
1193         }
1194
1195         ath_prepare_reset(sc, false, true);
1196
1197         if (sc->rx.frag) {
1198                 dev_kfree_skb_any(sc->rx.frag);
1199                 sc->rx.frag = NULL;
1200         }
1201
1202         if (!ah->curchan)
1203                 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
1204
1205         ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
1206         ath9k_hw_phy_disable(ah);
1207
1208         ath9k_hw_configpcipowersave(ah, true);
1209
1210         spin_unlock_bh(&sc->sc_pcu_lock);
1211
1212         ath9k_ps_restore(sc);
1213
1214         sc->sc_flags |= SC_OP_INVALID;
1215         sc->ps_idle = prev_idle;
1216
1217         mutex_unlock(&sc->mutex);
1218
1219         ath_dbg(common, CONFIG, "Driver halt\n");
1220 }
1221
1222 bool ath9k_uses_beacons(int type)
1223 {
1224         switch (type) {
1225         case NL80211_IFTYPE_AP:
1226         case NL80211_IFTYPE_ADHOC:
1227         case NL80211_IFTYPE_MESH_POINT:
1228                 return true;
1229         default:
1230                 return false;
1231         }
1232 }
1233
1234 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1235                                  struct ieee80211_vif *vif)
1236 {
1237         struct ath_vif *avp = (void *)vif->drv_priv;
1238
1239         ath9k_set_beaconing_status(sc, false);
1240         ath_beacon_return(sc, avp);
1241         ath9k_set_beaconing_status(sc, true);
1242         sc->sc_flags &= ~SC_OP_BEACONS;
1243 }
1244
1245 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1246 {
1247         struct ath9k_vif_iter_data *iter_data = data;
1248         int i;
1249
1250         if (iter_data->hw_macaddr)
1251                 for (i = 0; i < ETH_ALEN; i++)
1252                         iter_data->mask[i] &=
1253                                 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1254
1255         switch (vif->type) {
1256         case NL80211_IFTYPE_AP:
1257                 iter_data->naps++;
1258                 break;
1259         case NL80211_IFTYPE_STATION:
1260                 iter_data->nstations++;
1261                 break;
1262         case NL80211_IFTYPE_ADHOC:
1263                 iter_data->nadhocs++;
1264                 break;
1265         case NL80211_IFTYPE_MESH_POINT:
1266                 iter_data->nmeshes++;
1267                 break;
1268         case NL80211_IFTYPE_WDS:
1269                 iter_data->nwds++;
1270                 break;
1271         default:
1272                 break;
1273         }
1274 }
1275
1276 /* Called with sc->mutex held. */
1277 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1278                                struct ieee80211_vif *vif,
1279                                struct ath9k_vif_iter_data *iter_data)
1280 {
1281         struct ath_softc *sc = hw->priv;
1282         struct ath_hw *ah = sc->sc_ah;
1283         struct ath_common *common = ath9k_hw_common(ah);
1284
1285         /*
1286          * Use the hardware MAC address as reference, the hardware uses it
1287          * together with the BSSID mask when matching addresses.
1288          */
1289         memset(iter_data, 0, sizeof(*iter_data));
1290         iter_data->hw_macaddr = common->macaddr;
1291         memset(&iter_data->mask, 0xff, ETH_ALEN);
1292
1293         if (vif)
1294                 ath9k_vif_iter(iter_data, vif->addr, vif);
1295
1296         /* Get list of all active MAC addresses */
1297         ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1298                                                    iter_data);
1299 }
1300
1301 /* Called with sc->mutex held. */
1302 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1303                                           struct ieee80211_vif *vif)
1304 {
1305         struct ath_softc *sc = hw->priv;
1306         struct ath_hw *ah = sc->sc_ah;
1307         struct ath_common *common = ath9k_hw_common(ah);
1308         struct ath9k_vif_iter_data iter_data;
1309
1310         ath9k_calculate_iter_data(hw, vif, &iter_data);
1311
1312         /* Set BSSID mask. */
1313         memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1314         ath_hw_setbssidmask(common);
1315
1316         /* Set op-mode & TSF */
1317         if (iter_data.naps > 0) {
1318                 ath9k_hw_set_tsfadjust(ah, 1);
1319                 sc->sc_flags |= SC_OP_TSF_RESET;
1320                 ah->opmode = NL80211_IFTYPE_AP;
1321         } else {
1322                 ath9k_hw_set_tsfadjust(ah, 0);
1323                 sc->sc_flags &= ~SC_OP_TSF_RESET;
1324
1325                 if (iter_data.nmeshes)
1326                         ah->opmode = NL80211_IFTYPE_MESH_POINT;
1327                 else if (iter_data.nwds)
1328                         ah->opmode = NL80211_IFTYPE_AP;
1329                 else if (iter_data.nadhocs)
1330                         ah->opmode = NL80211_IFTYPE_ADHOC;
1331                 else
1332                         ah->opmode = NL80211_IFTYPE_STATION;
1333         }
1334
1335         /*
1336          * Enable MIB interrupts when there are hardware phy counters.
1337          */
1338         if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1339                 if (ah->config.enable_ani)
1340                         ah->imask |= ATH9K_INT_MIB;
1341                 ah->imask |= ATH9K_INT_TSFOOR;
1342         } else {
1343                 ah->imask &= ~ATH9K_INT_MIB;
1344                 ah->imask &= ~ATH9K_INT_TSFOOR;
1345         }
1346
1347         ath9k_hw_set_interrupts(ah);
1348
1349         /* Set up ANI */
1350         if (iter_data.naps > 0) {
1351                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1352
1353                 if (!common->disable_ani) {
1354                         sc->sc_flags |= SC_OP_ANI_RUN;
1355                         ath_start_ani(common);
1356                 }
1357
1358         } else {
1359                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1360                 del_timer_sync(&common->ani.timer);
1361         }
1362 }
1363
1364 /* Called with sc->mutex held, vif counts set up properly. */
1365 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1366                                    struct ieee80211_vif *vif)
1367 {
1368         struct ath_softc *sc = hw->priv;
1369
1370         ath9k_calculate_summary_state(hw, vif);
1371
1372         if (ath9k_uses_beacons(vif->type)) {
1373                 int error;
1374                 /* This may fail because upper levels do not have beacons
1375                  * properly configured yet.  That's OK, we assume it
1376                  * will be properly configured and then we will be notified
1377                  * in the info_changed method and set up beacons properly
1378                  * there.
1379                  */
1380                 ath9k_set_beaconing_status(sc, false);
1381                 error = ath_beacon_alloc(sc, vif);
1382                 if (!error)
1383                         ath_beacon_config(sc, vif);
1384                 ath9k_set_beaconing_status(sc, true);
1385         }
1386 }
1387
1388
1389 static int ath9k_add_interface(struct ieee80211_hw *hw,
1390                                struct ieee80211_vif *vif)
1391 {
1392         struct ath_softc *sc = hw->priv;
1393         struct ath_hw *ah = sc->sc_ah;
1394         struct ath_common *common = ath9k_hw_common(ah);
1395         int ret = 0;
1396
1397         ath9k_ps_wakeup(sc);
1398         mutex_lock(&sc->mutex);
1399
1400         switch (vif->type) {
1401         case NL80211_IFTYPE_STATION:
1402         case NL80211_IFTYPE_WDS:
1403         case NL80211_IFTYPE_ADHOC:
1404         case NL80211_IFTYPE_AP:
1405         case NL80211_IFTYPE_MESH_POINT:
1406                 break;
1407         default:
1408                 ath_err(common, "Interface type %d not yet supported\n",
1409                         vif->type);
1410                 ret = -EOPNOTSUPP;
1411                 goto out;
1412         }
1413
1414         if (ath9k_uses_beacons(vif->type)) {
1415                 if (sc->nbcnvifs >= ATH_BCBUF) {
1416                         ath_err(common, "Not enough beacon buffers when adding"
1417                                 " new interface of type: %i\n",
1418                                 vif->type);
1419                         ret = -ENOBUFS;
1420                         goto out;
1421                 }
1422         }
1423
1424         if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1425             ((vif->type == NL80211_IFTYPE_ADHOC) &&
1426              sc->nvifs > 0)) {
1427                 ath_err(common, "Cannot create ADHOC interface when other"
1428                         " interfaces already exist.\n");
1429                 ret = -EINVAL;
1430                 goto out;
1431         }
1432
1433         ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1434
1435         sc->nvifs++;
1436
1437         ath9k_do_vif_add_setup(hw, vif);
1438 out:
1439         mutex_unlock(&sc->mutex);
1440         ath9k_ps_restore(sc);
1441         return ret;
1442 }
1443
1444 static int ath9k_change_interface(struct ieee80211_hw *hw,
1445                                   struct ieee80211_vif *vif,
1446                                   enum nl80211_iftype new_type,
1447                                   bool p2p)
1448 {
1449         struct ath_softc *sc = hw->priv;
1450         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1451         int ret = 0;
1452
1453         ath_dbg(common, CONFIG, "Change Interface\n");
1454         mutex_lock(&sc->mutex);
1455         ath9k_ps_wakeup(sc);
1456
1457         /* See if new interface type is valid. */
1458         if ((new_type == NL80211_IFTYPE_ADHOC) &&
1459             (sc->nvifs > 1)) {
1460                 ath_err(common, "When using ADHOC, it must be the only"
1461                         " interface.\n");
1462                 ret = -EINVAL;
1463                 goto out;
1464         }
1465
1466         if (ath9k_uses_beacons(new_type) &&
1467             !ath9k_uses_beacons(vif->type)) {
1468                 if (sc->nbcnvifs >= ATH_BCBUF) {
1469                         ath_err(common, "No beacon slot available\n");
1470                         ret = -ENOBUFS;
1471                         goto out;
1472                 }
1473         }
1474
1475         /* Clean up old vif stuff */
1476         if (ath9k_uses_beacons(vif->type))
1477                 ath9k_reclaim_beacon(sc, vif);
1478
1479         /* Add new settings */
1480         vif->type = new_type;
1481         vif->p2p = p2p;
1482
1483         ath9k_do_vif_add_setup(hw, vif);
1484 out:
1485         ath9k_ps_restore(sc);
1486         mutex_unlock(&sc->mutex);
1487         return ret;
1488 }
1489
1490 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1491                                    struct ieee80211_vif *vif)
1492 {
1493         struct ath_softc *sc = hw->priv;
1494         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1495
1496         ath_dbg(common, CONFIG, "Detach Interface\n");
1497
1498         ath9k_ps_wakeup(sc);
1499         mutex_lock(&sc->mutex);
1500
1501         sc->nvifs--;
1502
1503         /* Reclaim beacon resources */
1504         if (ath9k_uses_beacons(vif->type))
1505                 ath9k_reclaim_beacon(sc, vif);
1506
1507         ath9k_calculate_summary_state(hw, NULL);
1508
1509         mutex_unlock(&sc->mutex);
1510         ath9k_ps_restore(sc);
1511 }
1512
1513 static void ath9k_enable_ps(struct ath_softc *sc)
1514 {
1515         struct ath_hw *ah = sc->sc_ah;
1516
1517         sc->ps_enabled = true;
1518         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1519                 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1520                         ah->imask |= ATH9K_INT_TIM_TIMER;
1521                         ath9k_hw_set_interrupts(ah);
1522                 }
1523                 ath9k_hw_setrxabort(ah, 1);
1524         }
1525 }
1526
1527 static void ath9k_disable_ps(struct ath_softc *sc)
1528 {
1529         struct ath_hw *ah = sc->sc_ah;
1530
1531         sc->ps_enabled = false;
1532         ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1533         if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1534                 ath9k_hw_setrxabort(ah, 0);
1535                 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1536                                   PS_WAIT_FOR_CAB |
1537                                   PS_WAIT_FOR_PSPOLL_DATA |
1538                                   PS_WAIT_FOR_TX_ACK);
1539                 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1540                         ah->imask &= ~ATH9K_INT_TIM_TIMER;
1541                         ath9k_hw_set_interrupts(ah);
1542                 }
1543         }
1544
1545 }
1546
1547 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1548 {
1549         struct ath_softc *sc = hw->priv;
1550         struct ath_hw *ah = sc->sc_ah;
1551         struct ath_common *common = ath9k_hw_common(ah);
1552         struct ieee80211_conf *conf = &hw->conf;
1553
1554         ath9k_ps_wakeup(sc);
1555         mutex_lock(&sc->mutex);
1556
1557         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1558                 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1559                 if (sc->ps_idle)
1560                         ath_cancel_work(sc);
1561         }
1562
1563         /*
1564          * We just prepare to enable PS. We have to wait until our AP has
1565          * ACK'd our null data frame to disable RX otherwise we'll ignore
1566          * those ACKs and end up retransmitting the same null data frames.
1567          * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1568          */
1569         if (changed & IEEE80211_CONF_CHANGE_PS) {
1570                 unsigned long flags;
1571                 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1572                 if (conf->flags & IEEE80211_CONF_PS)
1573                         ath9k_enable_ps(sc);
1574                 else
1575                         ath9k_disable_ps(sc);
1576                 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1577         }
1578
1579         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1580                 if (conf->flags & IEEE80211_CONF_MONITOR) {
1581                         ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1582                         sc->sc_ah->is_monitoring = true;
1583                 } else {
1584                         ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1585                         sc->sc_ah->is_monitoring = false;
1586                 }
1587         }
1588
1589         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1590                 struct ieee80211_channel *curchan = hw->conf.channel;
1591                 int pos = curchan->hw_value;
1592                 int old_pos = -1;
1593                 unsigned long flags;
1594
1595                 if (ah->curchan)
1596                         old_pos = ah->curchan - &ah->channels[0];
1597
1598                 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1599                         sc->sc_flags |= SC_OP_OFFCHANNEL;
1600                 else
1601                         sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1602
1603                 ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
1604                         curchan->center_freq, conf->channel_type);
1605
1606                 /* update survey stats for the old channel before switching */
1607                 spin_lock_irqsave(&common->cc_lock, flags);
1608                 ath_update_survey_stats(sc);
1609                 spin_unlock_irqrestore(&common->cc_lock, flags);
1610
1611                 /*
1612                  * Preserve the current channel values, before updating
1613                  * the same channel
1614                  */
1615                 if (ah->curchan && (old_pos == pos))
1616                         ath9k_hw_getnf(ah, ah->curchan);
1617
1618                 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1619                                           curchan, conf->channel_type);
1620
1621                 /*
1622                  * If the operating channel changes, change the survey in-use flags
1623                  * along with it.
1624                  * Reset the survey data for the new channel, unless we're switching
1625                  * back to the operating channel from an off-channel operation.
1626                  */
1627                 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1628                     sc->cur_survey != &sc->survey[pos]) {
1629
1630                         if (sc->cur_survey)
1631                                 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1632
1633                         sc->cur_survey = &sc->survey[pos];
1634
1635                         memset(sc->cur_survey, 0, sizeof(struct survey_info));
1636                         sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1637                 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1638                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1639                 }
1640
1641                 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1642                         ath_err(common, "Unable to set channel\n");
1643                         mutex_unlock(&sc->mutex);
1644                         return -EINVAL;
1645                 }
1646
1647                 /*
1648                  * The most recent snapshot of channel->noisefloor for the old
1649                  * channel is only available after the hardware reset. Copy it to
1650                  * the survey stats now.
1651                  */
1652                 if (old_pos >= 0)
1653                         ath_update_survey_nf(sc, old_pos);
1654         }
1655
1656         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1657                 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1658                 sc->config.txpowlimit = 2 * conf->power_level;
1659                 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1660                                        sc->config.txpowlimit, &sc->curtxpow);
1661         }
1662
1663         mutex_unlock(&sc->mutex);
1664         ath9k_ps_restore(sc);
1665
1666         return 0;
1667 }
1668
1669 #define SUPPORTED_FILTERS                       \
1670         (FIF_PROMISC_IN_BSS |                   \
1671         FIF_ALLMULTI |                          \
1672         FIF_CONTROL |                           \
1673         FIF_PSPOLL |                            \
1674         FIF_OTHER_BSS |                         \
1675         FIF_BCN_PRBRESP_PROMISC |               \
1676         FIF_PROBE_REQ |                         \
1677         FIF_FCSFAIL)
1678
1679 /* FIXME: sc->sc_full_reset ? */
1680 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1681                                    unsigned int changed_flags,
1682                                    unsigned int *total_flags,
1683                                    u64 multicast)
1684 {
1685         struct ath_softc *sc = hw->priv;
1686         u32 rfilt;
1687
1688         changed_flags &= SUPPORTED_FILTERS;
1689         *total_flags &= SUPPORTED_FILTERS;
1690
1691         sc->rx.rxfilter = *total_flags;
1692         ath9k_ps_wakeup(sc);
1693         rfilt = ath_calcrxfilter(sc);
1694         ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1695         ath9k_ps_restore(sc);
1696
1697         ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1698                 rfilt);
1699 }
1700
1701 static int ath9k_sta_add(struct ieee80211_hw *hw,
1702                          struct ieee80211_vif *vif,
1703                          struct ieee80211_sta *sta)
1704 {
1705         struct ath_softc *sc = hw->priv;
1706         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1707         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1708         struct ieee80211_key_conf ps_key = { };
1709
1710         ath_node_attach(sc, sta, vif);
1711
1712         if (vif->type != NL80211_IFTYPE_AP &&
1713             vif->type != NL80211_IFTYPE_AP_VLAN)
1714                 return 0;
1715
1716         an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1717
1718         return 0;
1719 }
1720
1721 static void ath9k_del_ps_key(struct ath_softc *sc,
1722                              struct ieee80211_vif *vif,
1723                              struct ieee80211_sta *sta)
1724 {
1725         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1726         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1727         struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1728
1729         if (!an->ps_key)
1730             return;
1731
1732         ath_key_delete(common, &ps_key);
1733 }
1734
1735 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1736                             struct ieee80211_vif *vif,
1737                             struct ieee80211_sta *sta)
1738 {
1739         struct ath_softc *sc = hw->priv;
1740
1741         ath9k_del_ps_key(sc, vif, sta);
1742         ath_node_detach(sc, sta);
1743
1744         return 0;
1745 }
1746
1747 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1748                          struct ieee80211_vif *vif,
1749                          enum sta_notify_cmd cmd,
1750                          struct ieee80211_sta *sta)
1751 {
1752         struct ath_softc *sc = hw->priv;
1753         struct ath_node *an = (struct ath_node *) sta->drv_priv;
1754
1755         if (!sta->ht_cap.ht_supported)
1756                 return;
1757
1758         switch (cmd) {
1759         case STA_NOTIFY_SLEEP:
1760                 an->sleeping = true;
1761                 ath_tx_aggr_sleep(sta, sc, an);
1762                 break;
1763         case STA_NOTIFY_AWAKE:
1764                 an->sleeping = false;
1765                 ath_tx_aggr_wakeup(sc, an);
1766                 break;
1767         }
1768 }
1769
1770 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1771                          struct ieee80211_vif *vif, u16 queue,
1772                          const struct ieee80211_tx_queue_params *params)
1773 {
1774         struct ath_softc *sc = hw->priv;
1775         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1776         struct ath_txq *txq;
1777         struct ath9k_tx_queue_info qi;
1778         int ret = 0;
1779
1780         if (queue >= WME_NUM_AC)
1781                 return 0;
1782
1783         txq = sc->tx.txq_map[queue];
1784
1785         ath9k_ps_wakeup(sc);
1786         mutex_lock(&sc->mutex);
1787
1788         memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1789
1790         qi.tqi_aifs = params->aifs;
1791         qi.tqi_cwmin = params->cw_min;
1792         qi.tqi_cwmax = params->cw_max;
1793         qi.tqi_burstTime = params->txop;
1794
1795         ath_dbg(common, CONFIG,
1796                 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1797                 queue, txq->axq_qnum, params->aifs, params->cw_min,
1798                 params->cw_max, params->txop);
1799
1800         ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1801         if (ret)
1802                 ath_err(common, "TXQ Update failed\n");
1803
1804         if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1805                 if (queue == WME_AC_BE && !ret)
1806                         ath_beaconq_config(sc);
1807
1808         mutex_unlock(&sc->mutex);
1809         ath9k_ps_restore(sc);
1810
1811         return ret;
1812 }
1813
1814 static int ath9k_set_key(struct ieee80211_hw *hw,
1815                          enum set_key_cmd cmd,
1816                          struct ieee80211_vif *vif,
1817                          struct ieee80211_sta *sta,
1818                          struct ieee80211_key_conf *key)
1819 {
1820         struct ath_softc *sc = hw->priv;
1821         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1822         int ret = 0;
1823
1824         if (ath9k_modparam_nohwcrypt)
1825                 return -ENOSPC;
1826
1827         if ((vif->type == NL80211_IFTYPE_ADHOC ||
1828              vif->type == NL80211_IFTYPE_MESH_POINT) &&
1829             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1830              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1831             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1832                 /*
1833                  * For now, disable hw crypto for the RSN IBSS group keys. This
1834                  * could be optimized in the future to use a modified key cache
1835                  * design to support per-STA RX GTK, but until that gets
1836                  * implemented, use of software crypto for group addressed
1837                  * frames is a acceptable to allow RSN IBSS to be used.
1838                  */
1839                 return -EOPNOTSUPP;
1840         }
1841
1842         mutex_lock(&sc->mutex);
1843         ath9k_ps_wakeup(sc);
1844         ath_dbg(common, CONFIG, "Set HW Key\n");
1845
1846         switch (cmd) {
1847         case SET_KEY:
1848                 if (sta)
1849                         ath9k_del_ps_key(sc, vif, sta);
1850
1851                 ret = ath_key_config(common, vif, sta, key);
1852                 if (ret >= 0) {
1853                         key->hw_key_idx = ret;
1854                         /* push IV and Michael MIC generation to stack */
1855                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1856                         if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1857                                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1858                         if (sc->sc_ah->sw_mgmt_crypto &&
1859                             key->cipher == WLAN_CIPHER_SUITE_CCMP)
1860                                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1861                         ret = 0;
1862                 }
1863                 break;
1864         case DISABLE_KEY:
1865                 ath_key_delete(common, key);
1866                 break;
1867         default:
1868                 ret = -EINVAL;
1869         }
1870
1871         ath9k_ps_restore(sc);
1872         mutex_unlock(&sc->mutex);
1873
1874         return ret;
1875 }
1876 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1877 {
1878         struct ath_softc *sc = data;
1879         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1880         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1881         struct ath_vif *avp = (void *)vif->drv_priv;
1882
1883         /*
1884          * Skip iteration if primary station vif's bss info
1885          * was not changed
1886          */
1887         if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1888                 return;
1889
1890         if (bss_conf->assoc) {
1891                 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1892                 avp->primary_sta_vif = true;
1893                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1894                 common->curaid = bss_conf->aid;
1895                 ath9k_hw_write_associd(sc->sc_ah);
1896                 ath_dbg(common, CONFIG, "Bss Info ASSOC %d, bssid: %pM\n",
1897                         bss_conf->aid, common->curbssid);
1898                 ath_beacon_config(sc, vif);
1899                 /*
1900                  * Request a re-configuration of Beacon related timers
1901                  * on the receipt of the first Beacon frame (i.e.,
1902                  * after time sync with the AP).
1903                  */
1904                 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1905                 /* Reset rssi stats */
1906                 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1907                 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1908
1909                 if (!common->disable_ani) {
1910                         sc->sc_flags |= SC_OP_ANI_RUN;
1911                         ath_start_ani(common);
1912                 }
1913
1914         }
1915 }
1916
1917 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
1918 {
1919         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1920         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1921         struct ath_vif *avp = (void *)vif->drv_priv;
1922
1923         if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1924                 return;
1925
1926         /* Reconfigure bss info */
1927         if (avp->primary_sta_vif && !bss_conf->assoc) {
1928                 ath_dbg(common, CONFIG, "Bss Info DISASSOC %d, bssid %pM\n",
1929                         common->curaid, common->curbssid);
1930                 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
1931                 avp->primary_sta_vif = false;
1932                 memset(common->curbssid, 0, ETH_ALEN);
1933                 common->curaid = 0;
1934         }
1935
1936         ieee80211_iterate_active_interfaces_atomic(
1937                         sc->hw, ath9k_bss_iter, sc);
1938
1939         /*
1940          * None of station vifs are associated.
1941          * Clear bssid & aid
1942          */
1943         if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
1944                 ath9k_hw_write_associd(sc->sc_ah);
1945                 /* Stop ANI */
1946                 sc->sc_flags &= ~SC_OP_ANI_RUN;
1947                 del_timer_sync(&common->ani.timer);
1948                 memset(&sc->caldata, 0, sizeof(sc->caldata));
1949         }
1950 }
1951
1952 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1953                                    struct ieee80211_vif *vif,
1954                                    struct ieee80211_bss_conf *bss_conf,
1955                                    u32 changed)
1956 {
1957         struct ath_softc *sc = hw->priv;
1958         struct ath_hw *ah = sc->sc_ah;
1959         struct ath_common *common = ath9k_hw_common(ah);
1960         struct ath_vif *avp = (void *)vif->drv_priv;
1961         int slottime;
1962         int error;
1963
1964         ath9k_ps_wakeup(sc);
1965         mutex_lock(&sc->mutex);
1966
1967         if (changed & BSS_CHANGED_ASSOC) {
1968                 ath9k_config_bss(sc, vif);
1969
1970                 ath_dbg(common, CONFIG, "BSSID: %pM aid: 0x%x\n",
1971                         common->curbssid, common->curaid);
1972         }
1973
1974         if (changed & BSS_CHANGED_IBSS) {
1975                 /* There can be only one vif available */
1976                 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1977                 common->curaid = bss_conf->aid;
1978                 ath9k_hw_write_associd(sc->sc_ah);
1979
1980                 if (bss_conf->ibss_joined) {
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                 } else {
1989                         sc->sc_flags &= ~SC_OP_ANI_RUN;
1990                         del_timer_sync(&common->ani.timer);
1991                 }
1992         }
1993
1994         /* Enable transmission of beacons (AP, IBSS, MESH) */
1995         if ((changed & BSS_CHANGED_BEACON) ||
1996             ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
1997                 ath9k_set_beaconing_status(sc, false);
1998                 error = ath_beacon_alloc(sc, vif);
1999                 if (!error)
2000                         ath_beacon_config(sc, vif);
2001                 ath9k_set_beaconing_status(sc, true);
2002         }
2003
2004         if (changed & BSS_CHANGED_ERP_SLOT) {
2005                 if (bss_conf->use_short_slot)
2006                         slottime = 9;
2007                 else
2008                         slottime = 20;
2009                 if (vif->type == NL80211_IFTYPE_AP) {
2010                         /*
2011                          * Defer update, so that connected stations can adjust
2012                          * their settings at the same time.
2013                          * See beacon.c for more details
2014                          */
2015                         sc->beacon.slottime = slottime;
2016                         sc->beacon.updateslot = UPDATE;
2017                 } else {
2018                         ah->slottime = slottime;
2019                         ath9k_hw_init_global_settings(ah);
2020                 }
2021         }
2022
2023         /* Disable transmission of beacons */
2024         if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2025             !bss_conf->enable_beacon) {
2026                 ath9k_set_beaconing_status(sc, false);
2027                 avp->is_bslot_active = false;
2028                 ath9k_set_beaconing_status(sc, true);
2029         }
2030
2031         if (changed & BSS_CHANGED_BEACON_INT) {
2032                 /*
2033                  * In case of AP mode, the HW TSF has to be reset
2034                  * when the beacon interval changes.
2035                  */
2036                 if (vif->type == NL80211_IFTYPE_AP) {
2037                         sc->sc_flags |= SC_OP_TSF_RESET;
2038                         ath9k_set_beaconing_status(sc, false);
2039                         error = ath_beacon_alloc(sc, vif);
2040                         if (!error)
2041                                 ath_beacon_config(sc, vif);
2042                         ath9k_set_beaconing_status(sc, true);
2043                 } else
2044                         ath_beacon_config(sc, vif);
2045         }
2046
2047         mutex_unlock(&sc->mutex);
2048         ath9k_ps_restore(sc);
2049 }
2050
2051 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2052 {
2053         struct ath_softc *sc = hw->priv;
2054         u64 tsf;
2055
2056         mutex_lock(&sc->mutex);
2057         ath9k_ps_wakeup(sc);
2058         tsf = ath9k_hw_gettsf64(sc->sc_ah);
2059         ath9k_ps_restore(sc);
2060         mutex_unlock(&sc->mutex);
2061
2062         return tsf;
2063 }
2064
2065 static void ath9k_set_tsf(struct ieee80211_hw *hw,
2066                           struct ieee80211_vif *vif,
2067                           u64 tsf)
2068 {
2069         struct ath_softc *sc = hw->priv;
2070
2071         mutex_lock(&sc->mutex);
2072         ath9k_ps_wakeup(sc);
2073         ath9k_hw_settsf64(sc->sc_ah, tsf);
2074         ath9k_ps_restore(sc);
2075         mutex_unlock(&sc->mutex);
2076 }
2077
2078 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2079 {
2080         struct ath_softc *sc = hw->priv;
2081
2082         mutex_lock(&sc->mutex);
2083
2084         ath9k_ps_wakeup(sc);
2085         ath9k_hw_reset_tsf(sc->sc_ah);
2086         ath9k_ps_restore(sc);
2087
2088         mutex_unlock(&sc->mutex);
2089 }
2090
2091 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2092                               struct ieee80211_vif *vif,
2093                               enum ieee80211_ampdu_mlme_action action,
2094                               struct ieee80211_sta *sta,
2095                               u16 tid, u16 *ssn, u8 buf_size)
2096 {
2097         struct ath_softc *sc = hw->priv;
2098         int ret = 0;
2099
2100         local_bh_disable();
2101
2102         switch (action) {
2103         case IEEE80211_AMPDU_RX_START:
2104                 break;
2105         case IEEE80211_AMPDU_RX_STOP:
2106                 break;
2107         case IEEE80211_AMPDU_TX_START:
2108                 ath9k_ps_wakeup(sc);
2109                 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2110                 if (!ret)
2111                         ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2112                 ath9k_ps_restore(sc);
2113                 break;
2114         case IEEE80211_AMPDU_TX_STOP:
2115                 ath9k_ps_wakeup(sc);
2116                 ath_tx_aggr_stop(sc, sta, tid);
2117                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2118                 ath9k_ps_restore(sc);
2119                 break;
2120         case IEEE80211_AMPDU_TX_OPERATIONAL:
2121                 ath9k_ps_wakeup(sc);
2122                 ath_tx_aggr_resume(sc, sta, tid);
2123                 ath9k_ps_restore(sc);
2124                 break;
2125         default:
2126                 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2127         }
2128
2129         local_bh_enable();
2130
2131         return ret;
2132 }
2133
2134 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2135                              struct survey_info *survey)
2136 {
2137         struct ath_softc *sc = hw->priv;
2138         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2139         struct ieee80211_supported_band *sband;
2140         struct ieee80211_channel *chan;
2141         unsigned long flags;
2142         int pos;
2143
2144         spin_lock_irqsave(&common->cc_lock, flags);
2145         if (idx == 0)
2146                 ath_update_survey_stats(sc);
2147
2148         sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2149         if (sband && idx >= sband->n_channels) {
2150                 idx -= sband->n_channels;
2151                 sband = NULL;
2152         }
2153
2154         if (!sband)
2155                 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2156
2157         if (!sband || idx >= sband->n_channels) {
2158                 spin_unlock_irqrestore(&common->cc_lock, flags);
2159                 return -ENOENT;
2160         }
2161
2162         chan = &sband->channels[idx];
2163         pos = chan->hw_value;
2164         memcpy(survey, &sc->survey[pos], sizeof(*survey));
2165         survey->channel = chan;
2166         spin_unlock_irqrestore(&common->cc_lock, flags);
2167
2168         return 0;
2169 }
2170
2171 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2172 {
2173         struct ath_softc *sc = hw->priv;
2174         struct ath_hw *ah = sc->sc_ah;
2175
2176         mutex_lock(&sc->mutex);
2177         ah->coverage_class = coverage_class;
2178
2179         ath9k_ps_wakeup(sc);
2180         ath9k_hw_init_global_settings(ah);
2181         ath9k_ps_restore(sc);
2182
2183         mutex_unlock(&sc->mutex);
2184 }
2185
2186 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2187 {
2188         struct ath_softc *sc = hw->priv;
2189         struct ath_hw *ah = sc->sc_ah;
2190         struct ath_common *common = ath9k_hw_common(ah);
2191         int timeout = 200; /* ms */
2192         int i, j;
2193         bool drain_txq;
2194
2195         mutex_lock(&sc->mutex);
2196         cancel_delayed_work_sync(&sc->tx_complete_work);
2197
2198         if (ah->ah_flags & AH_UNPLUGGED) {
2199                 ath_dbg(common, ANY, "Device has been unplugged!\n");
2200                 mutex_unlock(&sc->mutex);
2201                 return;
2202         }
2203
2204         if (sc->sc_flags & SC_OP_INVALID) {
2205                 ath_dbg(common, ANY, "Device not present\n");
2206                 mutex_unlock(&sc->mutex);
2207                 return;
2208         }
2209
2210         for (j = 0; j < timeout; j++) {
2211                 bool npend = false;
2212
2213                 if (j)
2214                         usleep_range(1000, 2000);
2215
2216                 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2217                         if (!ATH_TXQ_SETUP(sc, i))
2218                                 continue;
2219
2220                         npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2221
2222                         if (npend)
2223                                 break;
2224                 }
2225
2226                 if (!npend)
2227                     break;
2228         }
2229
2230         if (drop) {
2231                 ath9k_ps_wakeup(sc);
2232                 spin_lock_bh(&sc->sc_pcu_lock);
2233                 drain_txq = ath_drain_all_txq(sc, false);
2234                 spin_unlock_bh(&sc->sc_pcu_lock);
2235
2236                 if (!drain_txq)
2237                         ath_reset(sc, false);
2238
2239                 ath9k_ps_restore(sc);
2240                 ieee80211_wake_queues(hw);
2241         }
2242
2243         ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2244         mutex_unlock(&sc->mutex);
2245 }
2246
2247 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2248 {
2249         struct ath_softc *sc = hw->priv;
2250         int i;
2251
2252         for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2253                 if (!ATH_TXQ_SETUP(sc, i))
2254                         continue;
2255
2256                 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2257                         return true;
2258         }
2259         return false;
2260 }
2261
2262 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2263 {
2264         struct ath_softc *sc = hw->priv;
2265         struct ath_hw *ah = sc->sc_ah;
2266         struct ieee80211_vif *vif;
2267         struct ath_vif *avp;
2268         struct ath_buf *bf;
2269         struct ath_tx_status ts;
2270         bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2271         int status;
2272
2273         vif = sc->beacon.bslot[0];
2274         if (!vif)
2275                 return 0;
2276
2277         avp = (void *)vif->drv_priv;
2278         if (!avp->is_bslot_active)
2279                 return 0;
2280
2281         if (!sc->beacon.tx_processed && !edma) {
2282                 tasklet_disable(&sc->bcon_tasklet);
2283
2284                 bf = avp->av_bcbuf;
2285                 if (!bf || !bf->bf_mpdu)
2286                         goto skip;
2287
2288                 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2289                 if (status == -EINPROGRESS)
2290                         goto skip;
2291
2292                 sc->beacon.tx_processed = true;
2293                 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2294
2295 skip:
2296                 tasklet_enable(&sc->bcon_tasklet);
2297         }
2298
2299         return sc->beacon.tx_last;
2300 }
2301
2302 static int ath9k_get_stats(struct ieee80211_hw *hw,
2303                            struct ieee80211_low_level_stats *stats)
2304 {
2305         struct ath_softc *sc = hw->priv;
2306         struct ath_hw *ah = sc->sc_ah;
2307         struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2308
2309         stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2310         stats->dot11RTSFailureCount = mib_stats->rts_bad;
2311         stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2312         stats->dot11RTSSuccessCount = mib_stats->rts_good;
2313         return 0;
2314 }
2315
2316 static u32 fill_chainmask(u32 cap, u32 new)
2317 {
2318         u32 filled = 0;
2319         int i;
2320
2321         for (i = 0; cap && new; i++, cap >>= 1) {
2322                 if (!(cap & BIT(0)))
2323                         continue;
2324
2325                 if (new & BIT(0))
2326                         filled |= BIT(i);
2327
2328                 new >>= 1;
2329         }
2330
2331         return filled;
2332 }
2333
2334 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2335 {
2336         struct ath_softc *sc = hw->priv;
2337         struct ath_hw *ah = sc->sc_ah;
2338
2339         if (!rx_ant || !tx_ant)
2340                 return -EINVAL;
2341
2342         sc->ant_rx = rx_ant;
2343         sc->ant_tx = tx_ant;
2344
2345         if (ah->caps.rx_chainmask == 1)
2346                 return 0;
2347
2348         /* AR9100 runs into calibration issues if not all rx chains are enabled */
2349         if (AR_SREV_9100(ah))
2350                 ah->rxchainmask = 0x7;
2351         else
2352                 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2353
2354         ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2355         ath9k_reload_chainmask_settings(sc);
2356
2357         return 0;
2358 }
2359
2360 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2361 {
2362         struct ath_softc *sc = hw->priv;
2363
2364         *tx_ant = sc->ant_tx;
2365         *rx_ant = sc->ant_rx;
2366         return 0;
2367 }
2368
2369 struct ieee80211_ops ath9k_ops = {
2370         .tx                 = ath9k_tx,
2371         .start              = ath9k_start,
2372         .stop               = ath9k_stop,
2373         .add_interface      = ath9k_add_interface,
2374         .change_interface   = ath9k_change_interface,
2375         .remove_interface   = ath9k_remove_interface,
2376         .config             = ath9k_config,
2377         .configure_filter   = ath9k_configure_filter,
2378         .sta_add            = ath9k_sta_add,
2379         .sta_remove         = ath9k_sta_remove,
2380         .sta_notify         = ath9k_sta_notify,
2381         .conf_tx            = ath9k_conf_tx,
2382         .bss_info_changed   = ath9k_bss_info_changed,
2383         .set_key            = ath9k_set_key,
2384         .get_tsf            = ath9k_get_tsf,
2385         .set_tsf            = ath9k_set_tsf,
2386         .reset_tsf          = ath9k_reset_tsf,
2387         .ampdu_action       = ath9k_ampdu_action,
2388         .get_survey         = ath9k_get_survey,
2389         .rfkill_poll        = ath9k_rfkill_poll_state,
2390         .set_coverage_class = ath9k_set_coverage_class,
2391         .flush              = ath9k_flush,
2392         .tx_frames_pending  = ath9k_tx_frames_pending,
2393         .tx_last_beacon     = ath9k_tx_last_beacon,
2394         .get_stats          = ath9k_get_stats,
2395         .set_antenna        = ath9k_set_antenna,
2396         .get_antenna        = ath9k_get_antenna,
2397 };