2 * Copyright (c) 2008-2011 Atheros Communications Inc.
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.
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.
17 #include <linux/nl80211.h>
18 #include <linux/delay.h>
22 static u8 parse_mpdudensity(u8 mpdudensity)
25 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
26 * 0 for no restriction
35 switch (mpdudensity) {
41 /* Our lower layer calculations limit our precision to
57 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
61 spin_lock_bh(&txq->axq_lock);
63 if (txq->axq_depth || !list_empty(&txq->axq_acq))
66 spin_unlock_bh(&txq->axq_lock);
70 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
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);
82 void ath9k_ps_wakeup(struct ath_softc *sc)
84 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
86 enum ath9k_power_mode power_mode;
88 spin_lock_irqsave(&sc->sc_pm_lock, flags);
89 if (++sc->ps_usecount != 1)
92 power_mode = sc->sc_ah->power_mode;
93 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
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.
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);
108 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
111 void ath9k_ps_restore(struct ath_softc *sc)
113 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
116 spin_lock_irqsave(&sc->sc_pm_lock, flags);
117 if (--sc->ps_usecount != 0)
120 spin_lock(&common->cc_lock);
121 ath_hw_cycle_counters_update(common);
122 spin_unlock(&common->cc_lock);
125 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
126 else if (sc->ps_enabled &&
127 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
129 PS_WAIT_FOR_PSPOLL_DATA |
130 PS_WAIT_FOR_TX_ACK)))
131 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
134 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
137 void ath_start_ani(struct ath_common *common)
139 struct ath_hw *ah = common->ah;
140 unsigned long timestamp = jiffies_to_msecs(jiffies);
141 struct ath_softc *sc = (struct ath_softc *) common->priv;
143 if (!(sc->sc_flags & SC_OP_ANI_RUN))
146 if (sc->sc_flags & SC_OP_OFFCHANNEL)
149 common->ani.longcal_timer = timestamp;
150 common->ani.shortcal_timer = timestamp;
151 common->ani.checkani_timer = timestamp;
153 mod_timer(&common->ani.timer,
155 msecs_to_jiffies((u32)ah->config.ani_poll_interval));
158 static void ath_update_survey_nf(struct ath_softc *sc, int channel)
160 struct ath_hw *ah = sc->sc_ah;
161 struct ath9k_channel *chan = &ah->channels[channel];
162 struct survey_info *survey = &sc->survey[channel];
164 if (chan->noisefloor) {
165 survey->filled |= SURVEY_INFO_NOISE_DBM;
166 survey->noise = ath9k_hw_getchan_noise(ah, chan);
171 * Updates the survey statistics and returns the busy time since last
172 * update in %, if the measurement duration was long enough for the
173 * result to be useful, -1 otherwise.
175 static int ath_update_survey_stats(struct ath_softc *sc)
177 struct ath_hw *ah = sc->sc_ah;
178 struct ath_common *common = ath9k_hw_common(ah);
179 int pos = ah->curchan - &ah->channels[0];
180 struct survey_info *survey = &sc->survey[pos];
181 struct ath_cycle_counters *cc = &common->cc_survey;
182 unsigned int div = common->clockrate * 1000;
188 if (ah->power_mode == ATH9K_PM_AWAKE)
189 ath_hw_cycle_counters_update(common);
191 if (cc->cycles > 0) {
192 survey->filled |= SURVEY_INFO_CHANNEL_TIME |
193 SURVEY_INFO_CHANNEL_TIME_BUSY |
194 SURVEY_INFO_CHANNEL_TIME_RX |
195 SURVEY_INFO_CHANNEL_TIME_TX;
196 survey->channel_time += cc->cycles / div;
197 survey->channel_time_busy += cc->rx_busy / div;
198 survey->channel_time_rx += cc->rx_frame / div;
199 survey->channel_time_tx += cc->tx_frame / div;
202 if (cc->cycles < div)
206 ret = cc->rx_busy * 100 / cc->cycles;
208 memset(cc, 0, sizeof(*cc));
210 ath_update_survey_nf(sc, pos);
216 * Set/change channels. If the channel is really being changed, it's done
217 * by reseting the chip. To accomplish this we must first cleanup any pending
218 * DMA, then restart stuff.
220 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
221 struct ath9k_channel *hchan)
223 struct ath_hw *ah = sc->sc_ah;
224 struct ath_common *common = ath9k_hw_common(ah);
225 struct ieee80211_conf *conf = &common->hw->conf;
226 bool fastcc = true, stopped;
227 struct ieee80211_channel *channel = hw->conf.channel;
228 struct ath9k_hw_cal_data *caldata = NULL;
231 if (sc->sc_flags & SC_OP_INVALID)
234 sc->hw_busy_count = 0;
236 del_timer_sync(&common->ani.timer);
237 cancel_work_sync(&sc->paprd_work);
238 cancel_work_sync(&sc->hw_check_work);
239 cancel_delayed_work_sync(&sc->tx_complete_work);
240 cancel_delayed_work_sync(&sc->hw_pll_work);
244 spin_lock_bh(&sc->sc_pcu_lock);
247 * This is only performed if the channel settings have
250 * To switch channels clear any pending DMA operations;
251 * wait long enough for the RX fifo to drain, reset the
252 * hardware at the new frequency, and then re-enable
253 * the relevant bits of the h/w.
255 ath9k_hw_disable_interrupts(ah);
256 stopped = ath_drain_all_txq(sc, false);
258 if (!ath_stoprecv(sc))
261 if (!ath9k_hw_check_alive(ah))
264 /* XXX: do not flush receive queue here. We don't want
265 * to flush data frames already in queue because of
266 * changing channel. */
268 if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
271 if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
272 caldata = &sc->caldata;
274 ath_dbg(common, ATH_DBG_CONFIG,
275 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
276 sc->sc_ah->curchan->channel,
277 channel->center_freq, conf_is_ht40(conf),
280 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
283 "Unable to reset channel (%u MHz), reset status %d\n",
284 channel->center_freq, r);
288 if (ath_startrecv(sc) != 0) {
289 ath_err(common, "Unable to restart recv logic\n");
294 ath9k_cmn_update_txpow(ah, sc->curtxpow,
295 sc->config.txpowlimit, &sc->curtxpow);
296 ath9k_hw_set_interrupts(ah, ah->imask);
297 ath9k_hw_enable_interrupts(ah);
299 if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
300 if (sc->sc_flags & SC_OP_BEACONS)
302 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
303 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
304 if (!common->disable_ani)
305 ath_start_ani(common);
309 ieee80211_wake_queues(hw);
311 spin_unlock_bh(&sc->sc_pcu_lock);
313 ath9k_ps_restore(sc);
317 static void ath_paprd_activate(struct ath_softc *sc)
319 struct ath_hw *ah = sc->sc_ah;
320 struct ath9k_hw_cal_data *caldata = ah->caldata;
323 if (!caldata || !caldata->paprd_done)
327 ar9003_paprd_enable(ah, false);
328 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
329 if (!(ah->txchainmask & BIT(chain)))
332 ar9003_paprd_populate_single_table(ah, caldata, chain);
335 ar9003_paprd_enable(ah, true);
336 ath9k_ps_restore(sc);
339 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
341 struct ieee80211_hw *hw = sc->hw;
342 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
343 struct ath_hw *ah = sc->sc_ah;
344 struct ath_common *common = ath9k_hw_common(ah);
345 struct ath_tx_control txctl;
348 memset(&txctl, 0, sizeof(txctl));
349 txctl.txq = sc->tx.txq_map[WME_AC_BE];
351 memset(tx_info, 0, sizeof(*tx_info));
352 tx_info->band = hw->conf.channel->band;
353 tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
354 tx_info->control.rates[0].idx = 0;
355 tx_info->control.rates[0].count = 1;
356 tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
357 tx_info->control.rates[1].idx = -1;
359 init_completion(&sc->paprd_complete);
360 txctl.paprd = BIT(chain);
362 if (ath_tx_start(hw, skb, &txctl) != 0) {
363 ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n");
364 dev_kfree_skb_any(skb);
368 time_left = wait_for_completion_timeout(&sc->paprd_complete,
369 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
372 ath_dbg(common, ATH_DBG_CALIBRATE,
373 "Timeout waiting for paprd training on TX chain %d\n",
379 void ath_paprd_calibrate(struct work_struct *work)
381 struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
382 struct ieee80211_hw *hw = sc->hw;
383 struct ath_hw *ah = sc->sc_ah;
384 struct ieee80211_hdr *hdr;
385 struct sk_buff *skb = NULL;
386 struct ath9k_hw_cal_data *caldata = ah->caldata;
387 struct ath_common *common = ath9k_hw_common(ah);
398 if (ar9003_paprd_init_table(ah) < 0)
401 skb = alloc_skb(len, GFP_KERNEL);
406 memset(skb->data, 0, len);
407 hdr = (struct ieee80211_hdr *)skb->data;
408 ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
409 hdr->frame_control = cpu_to_le16(ftype);
410 hdr->duration_id = cpu_to_le16(10);
411 memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
412 memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
413 memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
415 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
416 if (!(ah->txchainmask & BIT(chain)))
421 ath_dbg(common, ATH_DBG_CALIBRATE,
422 "Sending PAPRD frame for thermal measurement "
423 "on chain %d\n", chain);
424 if (!ath_paprd_send_frame(sc, skb, chain))
427 ar9003_paprd_setup_gain_table(ah, chain);
429 ath_dbg(common, ATH_DBG_CALIBRATE,
430 "Sending PAPRD training frame on chain %d\n", chain);
431 if (!ath_paprd_send_frame(sc, skb, chain))
434 if (!ar9003_paprd_is_done(ah)) {
435 ath_dbg(common, ATH_DBG_CALIBRATE,
436 "PAPRD not yet done on chain %d\n", chain);
440 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
441 ath_dbg(common, ATH_DBG_CALIBRATE,
442 "PAPRD create curve failed on chain %d\n",
452 caldata->paprd_done = true;
453 ath_paprd_activate(sc);
457 ath9k_ps_restore(sc);
461 * This routine performs the periodic noise floor calibration function
462 * that is used to adjust and optimize the chip performance. This
463 * takes environmental changes (location, temperature) into account.
464 * When the task is complete, it reschedules itself depending on the
465 * appropriate interval that was calculated.
467 void ath_ani_calibrate(unsigned long data)
469 struct ath_softc *sc = (struct ath_softc *)data;
470 struct ath_hw *ah = sc->sc_ah;
471 struct ath_common *common = ath9k_hw_common(ah);
472 bool longcal = false;
473 bool shortcal = false;
474 bool aniflag = false;
475 unsigned int timestamp = jiffies_to_msecs(jiffies);
476 u32 cal_interval, short_cal_interval, long_cal_interval;
479 if (ah->caldata && ah->caldata->nfcal_interference)
480 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
482 long_cal_interval = ATH_LONG_CALINTERVAL;
484 short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
485 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
487 /* Only calibrate if awake */
488 if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
493 /* Long calibration runs independently of short calibration. */
494 if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
496 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
497 common->ani.longcal_timer = timestamp;
500 /* Short calibration applies only while caldone is false */
501 if (!common->ani.caldone) {
502 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
504 ath_dbg(common, ATH_DBG_ANI,
505 "shortcal @%lu\n", jiffies);
506 common->ani.shortcal_timer = timestamp;
507 common->ani.resetcal_timer = timestamp;
510 if ((timestamp - common->ani.resetcal_timer) >=
511 ATH_RESTART_CALINTERVAL) {
512 common->ani.caldone = ath9k_hw_reset_calvalid(ah);
513 if (common->ani.caldone)
514 common->ani.resetcal_timer = timestamp;
518 /* Verify whether we must check ANI */
519 if ((timestamp - common->ani.checkani_timer) >=
520 ah->config.ani_poll_interval) {
522 common->ani.checkani_timer = timestamp;
525 /* Call ANI routine if necessary */
527 spin_lock_irqsave(&common->cc_lock, flags);
528 ath9k_hw_ani_monitor(ah, ah->curchan);
529 ath_update_survey_stats(sc);
530 spin_unlock_irqrestore(&common->cc_lock, flags);
533 /* Perform calibration if necessary */
534 if (longcal || shortcal) {
535 common->ani.caldone =
536 ath9k_hw_calibrate(ah, ah->curchan,
537 ah->rxchainmask, longcal);
540 ath9k_ps_restore(sc);
544 * Set timer interval based on previous results.
545 * The interval must be the shortest necessary to satisfy ANI,
546 * short calibration and long calibration.
548 ath9k_debug_samp_bb_mac(sc);
549 cal_interval = ATH_LONG_CALINTERVAL;
550 if (sc->sc_ah->config.enable_ani)
551 cal_interval = min(cal_interval,
552 (u32)ah->config.ani_poll_interval);
553 if (!common->ani.caldone)
554 cal_interval = min(cal_interval, (u32)short_cal_interval);
556 mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
557 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
558 if (!ah->caldata->paprd_done)
559 ieee80211_queue_work(sc->hw, &sc->paprd_work);
560 else if (!ah->paprd_table_write_done)
561 ath_paprd_activate(sc);
565 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
568 an = (struct ath_node *)sta->drv_priv;
570 #ifdef CONFIG_ATH9K_DEBUGFS
571 spin_lock(&sc->nodes_lock);
572 list_add(&an->list, &sc->nodes);
573 spin_unlock(&sc->nodes_lock);
576 if (sc->sc_flags & SC_OP_TXAGGR) {
577 ath_tx_node_init(sc, an);
578 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
579 sta->ht_cap.ampdu_factor);
580 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
584 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
586 struct ath_node *an = (struct ath_node *)sta->drv_priv;
588 #ifdef CONFIG_ATH9K_DEBUGFS
589 spin_lock(&sc->nodes_lock);
591 spin_unlock(&sc->nodes_lock);
595 if (sc->sc_flags & SC_OP_TXAGGR)
596 ath_tx_node_cleanup(sc, an);
600 void ath9k_tasklet(unsigned long data)
602 struct ath_softc *sc = (struct ath_softc *)data;
603 struct ath_hw *ah = sc->sc_ah;
604 struct ath_common *common = ath9k_hw_common(ah);
606 u32 status = sc->intrstatus;
609 if ((status & ATH9K_INT_FATAL) ||
610 (status & ATH9K_INT_BB_WATCHDOG)) {
611 spin_lock(&sc->sc_pcu_lock);
613 spin_unlock(&sc->sc_pcu_lock);
618 spin_lock(&sc->sc_pcu_lock);
621 * Only run the baseband hang check if beacons stop working in AP or
622 * IBSS mode, because it has a high false positive rate. For station
623 * mode it should not be necessary, since the upper layers will detect
624 * this through a beacon miss automatically and the following channel
625 * change will trigger a hardware reset anyway
627 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
628 !ath9k_hw_check_alive(ah))
629 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
631 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
633 * TSF sync does not look correct; remain awake to sync with
636 ath_dbg(common, ATH_DBG_PS,
637 "TSFOOR - Sync with next Beacon\n");
638 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
641 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
642 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
645 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
647 if (status & rxmask) {
648 /* Check for high priority Rx first */
649 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
650 (status & ATH9K_INT_RXHP))
651 ath_rx_tasklet(sc, 0, true);
653 ath_rx_tasklet(sc, 0, false);
656 if (status & ATH9K_INT_TX) {
657 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
658 ath_tx_edma_tasklet(sc);
663 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
664 if (status & ATH9K_INT_GENTIMER)
665 ath_gen_timer_isr(sc->sc_ah);
667 /* re-enable hardware interrupt */
668 ath9k_hw_enable_interrupts(ah);
670 spin_unlock(&sc->sc_pcu_lock);
671 ath9k_ps_restore(sc);
674 irqreturn_t ath_isr(int irq, void *dev)
676 #define SCHED_INTR ( \
678 ATH9K_INT_BB_WATCHDOG | \
690 struct ath_softc *sc = dev;
691 struct ath_hw *ah = sc->sc_ah;
692 struct ath_common *common = ath9k_hw_common(ah);
693 enum ath9k_int status;
697 * The hardware is not ready/present, don't
698 * touch anything. Note this can happen early
699 * on if the IRQ is shared.
701 if (sc->sc_flags & SC_OP_INVALID)
705 /* shared irq, not for us */
707 if (!ath9k_hw_intrpend(ah))
711 * Figure out the reason(s) for the interrupt. Note
712 * that the hal returns a pseudo-ISR that may include
713 * bits we haven't explicitly enabled so we mask the
714 * value to insure we only process bits we requested.
716 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
717 status &= ah->imask; /* discard unasked-for bits */
720 * If there are no status bits set, then this interrupt was not
721 * for me (should have been caught above).
726 /* Cache the status */
727 sc->intrstatus = status;
729 if (status & SCHED_INTR)
733 * If a FATAL or RXORN interrupt is received, we have to reset the
736 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
737 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
740 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
741 (status & ATH9K_INT_BB_WATCHDOG)) {
743 spin_lock(&common->cc_lock);
744 ath_hw_cycle_counters_update(common);
745 ar9003_hw_bb_watchdog_dbg_info(ah);
746 spin_unlock(&common->cc_lock);
751 if (status & ATH9K_INT_SWBA)
752 tasklet_schedule(&sc->bcon_tasklet);
754 if (status & ATH9K_INT_TXURN)
755 ath9k_hw_updatetxtriglevel(ah, true);
757 if (status & ATH9K_INT_RXEOL) {
758 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
759 ath9k_hw_set_interrupts(ah, ah->imask);
762 if (status & ATH9K_INT_MIB) {
764 * Disable interrupts until we service the MIB
765 * interrupt; otherwise it will continue to
768 ath9k_hw_disable_interrupts(ah);
770 * Let the hal handle the event. We assume
771 * it will clear whatever condition caused
774 spin_lock(&common->cc_lock);
775 ath9k_hw_proc_mib_event(ah);
776 spin_unlock(&common->cc_lock);
777 ath9k_hw_enable_interrupts(ah);
780 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
781 if (status & ATH9K_INT_TIM_TIMER) {
782 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
784 /* Clear RxAbort bit so that we can
786 ath9k_setpower(sc, ATH9K_PM_AWAKE);
787 ath9k_hw_setrxabort(sc->sc_ah, 0);
788 sc->ps_flags |= PS_WAIT_FOR_BEACON;
793 ath_debug_stat_interrupt(sc, status);
796 /* turn off every interrupt */
797 ath9k_hw_disable_interrupts(ah);
798 tasklet_schedule(&sc->intr_tq);
806 static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
808 struct ath_hw *ah = sc->sc_ah;
809 struct ath_common *common = ath9k_hw_common(ah);
810 struct ieee80211_channel *channel = hw->conf.channel;
814 spin_lock_bh(&sc->sc_pcu_lock);
815 atomic_set(&ah->intr_ref_cnt, -1);
817 ath9k_hw_configpcipowersave(ah, false);
820 ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
822 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
825 "Unable to reset channel (%u MHz), reset status %d\n",
826 channel->center_freq, r);
829 ath9k_cmn_update_txpow(ah, sc->curtxpow,
830 sc->config.txpowlimit, &sc->curtxpow);
831 if (ath_startrecv(sc) != 0) {
832 ath_err(common, "Unable to restart recv logic\n");
835 if (sc->sc_flags & SC_OP_BEACONS)
836 ath_set_beacon(sc); /* restart beacons */
838 /* Re-Enable interrupts */
839 ath9k_hw_set_interrupts(ah, ah->imask);
840 ath9k_hw_enable_interrupts(ah);
843 ath9k_hw_cfg_output(ah, ah->led_pin,
844 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
845 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
847 ieee80211_wake_queues(hw);
848 ieee80211_queue_delayed_work(hw, &sc->hw_pll_work, HZ/2);
851 spin_unlock_bh(&sc->sc_pcu_lock);
853 ath9k_ps_restore(sc);
856 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
858 struct ath_hw *ah = sc->sc_ah;
859 struct ieee80211_channel *channel = hw->conf.channel;
863 cancel_delayed_work_sync(&sc->hw_pll_work);
865 spin_lock_bh(&sc->sc_pcu_lock);
867 ieee80211_stop_queues(hw);
870 * Keep the LED on when the radio is disabled
871 * during idle unassociated state.
874 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
875 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
878 /* Disable interrupts */
879 ath9k_hw_disable_interrupts(ah);
881 ath_drain_all_txq(sc, false); /* clear pending tx frames */
883 ath_stoprecv(sc); /* turn off frame recv */
884 ath_flushrecv(sc); /* flush recv queue */
887 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
889 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
891 ath_err(ath9k_hw_common(sc->sc_ah),
892 "Unable to reset channel (%u MHz), reset status %d\n",
893 channel->center_freq, r);
896 ath9k_hw_phy_disable(ah);
898 ath9k_hw_configpcipowersave(ah, true);
900 spin_unlock_bh(&sc->sc_pcu_lock);
901 ath9k_ps_restore(sc);
904 int ath_reset(struct ath_softc *sc, bool retry_tx)
906 struct ath_hw *ah = sc->sc_ah;
907 struct ath_common *common = ath9k_hw_common(ah);
908 struct ieee80211_hw *hw = sc->hw;
911 sc->hw_busy_count = 0;
913 ath9k_debug_samp_bb_mac(sc);
916 del_timer_sync(&common->ani.timer);
920 ieee80211_stop_queues(hw);
922 ath9k_hw_disable_interrupts(ah);
923 ath_drain_all_txq(sc, retry_tx);
928 r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
931 "Unable to reset hardware; reset status %d\n", r);
933 if (ath_startrecv(sc) != 0)
934 ath_err(common, "Unable to start recv logic\n");
937 * We may be doing a reset in response to a request
938 * that changes the channel so update any state that
939 * might change as a result.
941 ath9k_cmn_update_txpow(ah, sc->curtxpow,
942 sc->config.txpowlimit, &sc->curtxpow);
944 if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
945 ath_set_beacon(sc); /* restart beacons */
947 ath9k_hw_set_interrupts(ah, ah->imask);
948 ath9k_hw_enable_interrupts(ah);
952 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
953 if (ATH_TXQ_SETUP(sc, i)) {
954 spin_lock_bh(&sc->tx.txq[i].axq_lock);
955 ath_txq_schedule(sc, &sc->tx.txq[i]);
956 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
961 ieee80211_wake_queues(hw);
964 if (!common->disable_ani)
965 ath_start_ani(common);
967 ath9k_ps_restore(sc);
972 void ath_hw_check(struct work_struct *work)
974 struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
975 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
980 if (ath9k_hw_check_alive(sc->sc_ah))
983 spin_lock_irqsave(&common->cc_lock, flags);
984 busy = ath_update_survey_stats(sc);
985 spin_unlock_irqrestore(&common->cc_lock, flags);
987 ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
988 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
990 if (++sc->hw_busy_count >= 3) {
991 spin_lock_bh(&sc->sc_pcu_lock);
993 spin_unlock_bh(&sc->sc_pcu_lock);
996 } else if (busy >= 0)
997 sc->hw_busy_count = 0;
1000 ath9k_ps_restore(sc);
1003 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
1006 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1008 if (pll_sqsum >= 0x40000) {
1011 /* Rx is hung for more than 500ms. Reset it */
1012 ath_dbg(common, ATH_DBG_RESET,
1013 "Possible RX hang, resetting");
1014 spin_lock_bh(&sc->sc_pcu_lock);
1015 ath_reset(sc, true);
1016 spin_unlock_bh(&sc->sc_pcu_lock);
1023 void ath_hw_pll_work(struct work_struct *work)
1025 struct ath_softc *sc = container_of(work, struct ath_softc,
1029 if (AR_SREV_9485(sc->sc_ah)) {
1031 ath9k_ps_wakeup(sc);
1032 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
1033 ath9k_ps_restore(sc);
1035 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
1037 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
1041 /**********************/
1042 /* mac80211 callbacks */
1043 /**********************/
1045 static int ath9k_start(struct ieee80211_hw *hw)
1047 struct ath_softc *sc = hw->priv;
1048 struct ath_hw *ah = sc->sc_ah;
1049 struct ath_common *common = ath9k_hw_common(ah);
1050 struct ieee80211_channel *curchan = hw->conf.channel;
1051 struct ath9k_channel *init_channel;
1054 ath_dbg(common, ATH_DBG_CONFIG,
1055 "Starting driver with initial channel: %d MHz\n",
1056 curchan->center_freq);
1058 ath9k_ps_wakeup(sc);
1060 mutex_lock(&sc->mutex);
1062 /* setup initial channel */
1063 sc->chan_idx = curchan->hw_value;
1065 init_channel = ath9k_cmn_get_curchannel(hw, ah);
1067 /* Reset SERDES registers */
1068 ath9k_hw_configpcipowersave(ah, false);
1071 * The basic interface to setting the hardware in a good
1072 * state is ``reset''. On return the hardware is known to
1073 * be powered up and with interrupts disabled. This must
1074 * be followed by initialization of the appropriate bits
1075 * and then setup of the interrupt mask.
1077 spin_lock_bh(&sc->sc_pcu_lock);
1078 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1081 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1082 r, curchan->center_freq);
1083 spin_unlock_bh(&sc->sc_pcu_lock);
1088 * This is needed only to setup initial state
1089 * but it's best done after a reset.
1091 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1092 sc->config.txpowlimit, &sc->curtxpow);
1095 * Setup the hardware after reset:
1096 * The receive engine is set going.
1097 * Frame transmit is handled entirely
1098 * in the frame output path; there's nothing to do
1099 * here except setup the interrupt mask.
1101 if (ath_startrecv(sc) != 0) {
1102 ath_err(common, "Unable to start recv logic\n");
1104 spin_unlock_bh(&sc->sc_pcu_lock);
1107 spin_unlock_bh(&sc->sc_pcu_lock);
1109 /* Setup our intr mask. */
1110 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1111 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1114 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1115 ah->imask |= ATH9K_INT_RXHP |
1117 ATH9K_INT_BB_WATCHDOG;
1119 ah->imask |= ATH9K_INT_RX;
1121 ah->imask |= ATH9K_INT_GTT;
1123 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1124 ah->imask |= ATH9K_INT_CST;
1126 sc->sc_flags &= ~SC_OP_INVALID;
1127 sc->sc_ah->is_monitoring = false;
1129 /* Disable BMISS interrupt when we're not associated */
1130 ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1131 ath9k_hw_set_interrupts(ah, ah->imask);
1132 ath9k_hw_enable_interrupts(ah);
1134 ieee80211_wake_queues(hw);
1136 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1138 if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1139 !ah->btcoex_hw.enabled) {
1140 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1141 AR_STOMP_LOW_WLAN_WGHT);
1142 ath9k_hw_btcoex_enable(ah);
1144 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1145 ath9k_btcoex_timer_resume(sc);
1148 if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1149 common->bus_ops->extn_synch_en(common);
1152 mutex_unlock(&sc->mutex);
1154 ath9k_ps_restore(sc);
1159 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1161 struct ath_softc *sc = hw->priv;
1162 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1163 struct ath_tx_control txctl;
1164 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1166 if (sc->ps_enabled) {
1168 * mac80211 does not set PM field for normal data frames, so we
1169 * need to update that based on the current PS mode.
1171 if (ieee80211_is_data(hdr->frame_control) &&
1172 !ieee80211_is_nullfunc(hdr->frame_control) &&
1173 !ieee80211_has_pm(hdr->frame_control)) {
1174 ath_dbg(common, ATH_DBG_PS,
1175 "Add PM=1 for a TX frame while in PS mode\n");
1176 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1180 if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1182 * We are using PS-Poll and mac80211 can request TX while in
1183 * power save mode. Need to wake up hardware for the TX to be
1184 * completed and if needed, also for RX of buffered frames.
1186 ath9k_ps_wakeup(sc);
1187 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1188 ath9k_hw_setrxabort(sc->sc_ah, 0);
1189 if (ieee80211_is_pspoll(hdr->frame_control)) {
1190 ath_dbg(common, ATH_DBG_PS,
1191 "Sending PS-Poll to pick a buffered frame\n");
1192 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1194 ath_dbg(common, ATH_DBG_PS,
1195 "Wake up to complete TX\n");
1196 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1199 * The actual restore operation will happen only after
1200 * the sc_flags bit is cleared. We are just dropping
1201 * the ps_usecount here.
1203 ath9k_ps_restore(sc);
1206 memset(&txctl, 0, sizeof(struct ath_tx_control));
1207 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1209 ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1211 if (ath_tx_start(hw, skb, &txctl) != 0) {
1212 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1218 dev_kfree_skb_any(skb);
1221 static void ath9k_stop(struct ieee80211_hw *hw)
1223 struct ath_softc *sc = hw->priv;
1224 struct ath_hw *ah = sc->sc_ah;
1225 struct ath_common *common = ath9k_hw_common(ah);
1227 mutex_lock(&sc->mutex);
1229 cancel_delayed_work_sync(&sc->tx_complete_work);
1230 cancel_delayed_work_sync(&sc->hw_pll_work);
1231 cancel_work_sync(&sc->paprd_work);
1232 cancel_work_sync(&sc->hw_check_work);
1234 if (sc->sc_flags & SC_OP_INVALID) {
1235 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1236 mutex_unlock(&sc->mutex);
1240 /* Ensure HW is awake when we try to shut it down. */
1241 ath9k_ps_wakeup(sc);
1243 if (ah->btcoex_hw.enabled) {
1244 ath9k_hw_btcoex_disable(ah);
1245 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1246 ath9k_btcoex_timer_pause(sc);
1249 spin_lock_bh(&sc->sc_pcu_lock);
1251 /* prevent tasklets to enable interrupts once we disable them */
1252 ah->imask &= ~ATH9K_INT_GLOBAL;
1254 /* make sure h/w will not generate any interrupt
1255 * before setting the invalid flag. */
1256 ath9k_hw_disable_interrupts(ah);
1258 if (!(sc->sc_flags & SC_OP_INVALID)) {
1259 ath_drain_all_txq(sc, false);
1261 ath9k_hw_phy_disable(ah);
1263 sc->rx.rxlink = NULL;
1266 dev_kfree_skb_any(sc->rx.frag);
1270 /* disable HAL and put h/w to sleep */
1271 ath9k_hw_disable(ah);
1273 spin_unlock_bh(&sc->sc_pcu_lock);
1275 /* we can now sync irq and kill any running tasklets, since we already
1276 * disabled interrupts and not holding a spin lock */
1277 synchronize_irq(sc->irq);
1278 tasklet_kill(&sc->intr_tq);
1279 tasklet_kill(&sc->bcon_tasklet);
1281 ath9k_ps_restore(sc);
1284 ath_radio_disable(sc, hw);
1286 sc->sc_flags |= SC_OP_INVALID;
1288 mutex_unlock(&sc->mutex);
1290 ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1293 bool ath9k_uses_beacons(int type)
1296 case NL80211_IFTYPE_AP:
1297 case NL80211_IFTYPE_ADHOC:
1298 case NL80211_IFTYPE_MESH_POINT:
1305 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1306 struct ieee80211_vif *vif)
1308 struct ath_vif *avp = (void *)vif->drv_priv;
1310 ath9k_set_beaconing_status(sc, false);
1311 ath_beacon_return(sc, avp);
1312 ath9k_set_beaconing_status(sc, true);
1313 sc->sc_flags &= ~SC_OP_BEACONS;
1316 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1318 struct ath9k_vif_iter_data *iter_data = data;
1321 if (iter_data->hw_macaddr)
1322 for (i = 0; i < ETH_ALEN; i++)
1323 iter_data->mask[i] &=
1324 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1326 switch (vif->type) {
1327 case NL80211_IFTYPE_AP:
1330 case NL80211_IFTYPE_STATION:
1331 iter_data->nstations++;
1333 case NL80211_IFTYPE_ADHOC:
1334 iter_data->nadhocs++;
1336 case NL80211_IFTYPE_MESH_POINT:
1337 iter_data->nmeshes++;
1339 case NL80211_IFTYPE_WDS:
1343 iter_data->nothers++;
1348 /* Called with sc->mutex held. */
1349 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1350 struct ieee80211_vif *vif,
1351 struct ath9k_vif_iter_data *iter_data)
1353 struct ath_softc *sc = hw->priv;
1354 struct ath_hw *ah = sc->sc_ah;
1355 struct ath_common *common = ath9k_hw_common(ah);
1358 * Use the hardware MAC address as reference, the hardware uses it
1359 * together with the BSSID mask when matching addresses.
1361 memset(iter_data, 0, sizeof(*iter_data));
1362 iter_data->hw_macaddr = common->macaddr;
1363 memset(&iter_data->mask, 0xff, ETH_ALEN);
1366 ath9k_vif_iter(iter_data, vif->addr, vif);
1368 /* Get list of all active MAC addresses */
1369 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1373 /* Called with sc->mutex held. */
1374 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1375 struct ieee80211_vif *vif)
1377 struct ath_softc *sc = hw->priv;
1378 struct ath_hw *ah = sc->sc_ah;
1379 struct ath_common *common = ath9k_hw_common(ah);
1380 struct ath9k_vif_iter_data iter_data;
1382 ath9k_calculate_iter_data(hw, vif, &iter_data);
1384 /* Set BSSID mask. */
1385 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1386 ath_hw_setbssidmask(common);
1388 /* Set op-mode & TSF */
1389 if (iter_data.naps > 0) {
1390 ath9k_hw_set_tsfadjust(ah, 1);
1391 sc->sc_flags |= SC_OP_TSF_RESET;
1392 ah->opmode = NL80211_IFTYPE_AP;
1394 ath9k_hw_set_tsfadjust(ah, 0);
1395 sc->sc_flags &= ~SC_OP_TSF_RESET;
1397 if (iter_data.nmeshes)
1398 ah->opmode = NL80211_IFTYPE_MESH_POINT;
1399 else if (iter_data.nwds)
1400 ah->opmode = NL80211_IFTYPE_AP;
1401 else if (iter_data.nadhocs)
1402 ah->opmode = NL80211_IFTYPE_ADHOC;
1404 ah->opmode = NL80211_IFTYPE_STATION;
1408 * Enable MIB interrupts when there are hardware phy counters.
1410 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1411 if (ah->config.enable_ani)
1412 ah->imask |= ATH9K_INT_MIB;
1413 ah->imask |= ATH9K_INT_TSFOOR;
1415 ah->imask &= ~ATH9K_INT_MIB;
1416 ah->imask &= ~ATH9K_INT_TSFOOR;
1419 ath9k_hw_set_interrupts(ah, ah->imask);
1422 if (iter_data.naps > 0) {
1423 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1425 if (!common->disable_ani) {
1426 sc->sc_flags |= SC_OP_ANI_RUN;
1427 ath_start_ani(common);
1431 sc->sc_flags &= ~SC_OP_ANI_RUN;
1432 del_timer_sync(&common->ani.timer);
1436 /* Called with sc->mutex held, vif counts set up properly. */
1437 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1438 struct ieee80211_vif *vif)
1440 struct ath_softc *sc = hw->priv;
1442 ath9k_calculate_summary_state(hw, vif);
1444 if (ath9k_uses_beacons(vif->type)) {
1446 /* This may fail because upper levels do not have beacons
1447 * properly configured yet. That's OK, we assume it
1448 * will be properly configured and then we will be notified
1449 * in the info_changed method and set up beacons properly
1452 ath9k_set_beaconing_status(sc, false);
1453 error = ath_beacon_alloc(sc, vif);
1455 ath_beacon_config(sc, vif);
1456 ath9k_set_beaconing_status(sc, true);
1461 static int ath9k_add_interface(struct ieee80211_hw *hw,
1462 struct ieee80211_vif *vif)
1464 struct ath_softc *sc = hw->priv;
1465 struct ath_hw *ah = sc->sc_ah;
1466 struct ath_common *common = ath9k_hw_common(ah);
1469 ath9k_ps_wakeup(sc);
1470 mutex_lock(&sc->mutex);
1472 switch (vif->type) {
1473 case NL80211_IFTYPE_STATION:
1474 case NL80211_IFTYPE_WDS:
1475 case NL80211_IFTYPE_ADHOC:
1476 case NL80211_IFTYPE_AP:
1477 case NL80211_IFTYPE_MESH_POINT:
1480 ath_err(common, "Interface type %d not yet supported\n",
1486 if (ath9k_uses_beacons(vif->type)) {
1487 if (sc->nbcnvifs >= ATH_BCBUF) {
1488 ath_err(common, "Not enough beacon buffers when adding"
1489 " new interface of type: %i\n",
1496 if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1497 ((vif->type == NL80211_IFTYPE_ADHOC) &&
1499 ath_err(common, "Cannot create ADHOC interface when other"
1500 " interfaces already exist.\n");
1505 ath_dbg(common, ATH_DBG_CONFIG,
1506 "Attach a VIF of type: %d\n", vif->type);
1510 ath9k_do_vif_add_setup(hw, vif);
1512 mutex_unlock(&sc->mutex);
1513 ath9k_ps_restore(sc);
1517 static int ath9k_change_interface(struct ieee80211_hw *hw,
1518 struct ieee80211_vif *vif,
1519 enum nl80211_iftype new_type,
1522 struct ath_softc *sc = hw->priv;
1523 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1526 ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1527 mutex_lock(&sc->mutex);
1528 ath9k_ps_wakeup(sc);
1530 /* See if new interface type is valid. */
1531 if ((new_type == NL80211_IFTYPE_ADHOC) &&
1533 ath_err(common, "When using ADHOC, it must be the only"
1539 if (ath9k_uses_beacons(new_type) &&
1540 !ath9k_uses_beacons(vif->type)) {
1541 if (sc->nbcnvifs >= ATH_BCBUF) {
1542 ath_err(common, "No beacon slot available\n");
1548 /* Clean up old vif stuff */
1549 if (ath9k_uses_beacons(vif->type))
1550 ath9k_reclaim_beacon(sc, vif);
1552 /* Add new settings */
1553 vif->type = new_type;
1556 ath9k_do_vif_add_setup(hw, vif);
1558 ath9k_ps_restore(sc);
1559 mutex_unlock(&sc->mutex);
1563 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1564 struct ieee80211_vif *vif)
1566 struct ath_softc *sc = hw->priv;
1567 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1569 ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1571 ath9k_ps_wakeup(sc);
1572 mutex_lock(&sc->mutex);
1576 /* Reclaim beacon resources */
1577 if (ath9k_uses_beacons(vif->type))
1578 ath9k_reclaim_beacon(sc, vif);
1580 ath9k_calculate_summary_state(hw, NULL);
1582 mutex_unlock(&sc->mutex);
1583 ath9k_ps_restore(sc);
1586 static void ath9k_enable_ps(struct ath_softc *sc)
1588 struct ath_hw *ah = sc->sc_ah;
1590 sc->ps_enabled = true;
1591 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1592 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1593 ah->imask |= ATH9K_INT_TIM_TIMER;
1594 ath9k_hw_set_interrupts(ah, ah->imask);
1596 ath9k_hw_setrxabort(ah, 1);
1600 static void ath9k_disable_ps(struct ath_softc *sc)
1602 struct ath_hw *ah = sc->sc_ah;
1604 sc->ps_enabled = false;
1605 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1606 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1607 ath9k_hw_setrxabort(ah, 0);
1608 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1610 PS_WAIT_FOR_PSPOLL_DATA |
1611 PS_WAIT_FOR_TX_ACK);
1612 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1613 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1614 ath9k_hw_set_interrupts(ah, ah->imask);
1620 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1622 struct ath_softc *sc = hw->priv;
1623 struct ath_hw *ah = sc->sc_ah;
1624 struct ath_common *common = ath9k_hw_common(ah);
1625 struct ieee80211_conf *conf = &hw->conf;
1626 bool disable_radio = false;
1628 mutex_lock(&sc->mutex);
1631 * Leave this as the first check because we need to turn on the
1632 * radio if it was disabled before prior to processing the rest
1633 * of the changes. Likewise we must only disable the radio towards
1636 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1637 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1639 ath_radio_enable(sc, hw);
1640 ath_dbg(common, ATH_DBG_CONFIG,
1641 "not-idle: enabling radio\n");
1643 disable_radio = true;
1648 * We just prepare to enable PS. We have to wait until our AP has
1649 * ACK'd our null data frame to disable RX otherwise we'll ignore
1650 * those ACKs and end up retransmitting the same null data frames.
1651 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1653 if (changed & IEEE80211_CONF_CHANGE_PS) {
1654 unsigned long flags;
1655 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1656 if (conf->flags & IEEE80211_CONF_PS)
1657 ath9k_enable_ps(sc);
1659 ath9k_disable_ps(sc);
1660 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1663 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1664 if (conf->flags & IEEE80211_CONF_MONITOR) {
1665 ath_dbg(common, ATH_DBG_CONFIG,
1666 "Monitor mode is enabled\n");
1667 sc->sc_ah->is_monitoring = true;
1669 ath_dbg(common, ATH_DBG_CONFIG,
1670 "Monitor mode is disabled\n");
1671 sc->sc_ah->is_monitoring = false;
1675 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1676 struct ieee80211_channel *curchan = hw->conf.channel;
1677 struct ath9k_channel old_chan;
1678 int pos = curchan->hw_value;
1680 unsigned long flags;
1683 old_pos = ah->curchan - &ah->channels[0];
1685 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1686 sc->sc_flags |= SC_OP_OFFCHANNEL;
1688 sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1690 ath_dbg(common, ATH_DBG_CONFIG,
1691 "Set channel: %d MHz type: %d\n",
1692 curchan->center_freq, conf->channel_type);
1694 /* update survey stats for the old channel before switching */
1695 spin_lock_irqsave(&common->cc_lock, flags);
1696 ath_update_survey_stats(sc);
1697 spin_unlock_irqrestore(&common->cc_lock, flags);
1700 * Preserve the current channel values, before updating
1703 if (old_pos == pos) {
1704 memcpy(&old_chan, &sc->sc_ah->channels[pos],
1705 sizeof(struct ath9k_channel));
1706 ah->curchan = &old_chan;
1709 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1710 curchan, conf->channel_type);
1713 * If the operating channel changes, change the survey in-use flags
1715 * Reset the survey data for the new channel, unless we're switching
1716 * back to the operating channel from an off-channel operation.
1718 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1719 sc->cur_survey != &sc->survey[pos]) {
1722 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1724 sc->cur_survey = &sc->survey[pos];
1726 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1727 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1728 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1729 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1732 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1733 ath_err(common, "Unable to set channel\n");
1734 mutex_unlock(&sc->mutex);
1739 * The most recent snapshot of channel->noisefloor for the old
1740 * channel is only available after the hardware reset. Copy it to
1741 * the survey stats now.
1744 ath_update_survey_nf(sc, old_pos);
1747 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1748 ath_dbg(common, ATH_DBG_CONFIG,
1749 "Set power: %d\n", conf->power_level);
1750 sc->config.txpowlimit = 2 * conf->power_level;
1751 ath9k_ps_wakeup(sc);
1752 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1753 sc->config.txpowlimit, &sc->curtxpow);
1754 ath9k_ps_restore(sc);
1757 if (disable_radio) {
1758 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1759 ath_radio_disable(sc, hw);
1762 mutex_unlock(&sc->mutex);
1767 #define SUPPORTED_FILTERS \
1768 (FIF_PROMISC_IN_BSS | \
1773 FIF_BCN_PRBRESP_PROMISC | \
1777 /* FIXME: sc->sc_full_reset ? */
1778 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1779 unsigned int changed_flags,
1780 unsigned int *total_flags,
1783 struct ath_softc *sc = hw->priv;
1786 changed_flags &= SUPPORTED_FILTERS;
1787 *total_flags &= SUPPORTED_FILTERS;
1789 sc->rx.rxfilter = *total_flags;
1790 ath9k_ps_wakeup(sc);
1791 rfilt = ath_calcrxfilter(sc);
1792 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1793 ath9k_ps_restore(sc);
1795 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1796 "Set HW RX filter: 0x%x\n", rfilt);
1799 static int ath9k_sta_add(struct ieee80211_hw *hw,
1800 struct ieee80211_vif *vif,
1801 struct ieee80211_sta *sta)
1803 struct ath_softc *sc = hw->priv;
1804 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1805 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1806 struct ieee80211_key_conf ps_key = { };
1808 ath_node_attach(sc, sta);
1810 if (vif->type != NL80211_IFTYPE_AP &&
1811 vif->type != NL80211_IFTYPE_AP_VLAN)
1814 an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1819 static void ath9k_del_ps_key(struct ath_softc *sc,
1820 struct ieee80211_vif *vif,
1821 struct ieee80211_sta *sta)
1823 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1824 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1825 struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1830 ath_key_delete(common, &ps_key);
1833 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1834 struct ieee80211_vif *vif,
1835 struct ieee80211_sta *sta)
1837 struct ath_softc *sc = hw->priv;
1839 ath9k_del_ps_key(sc, vif, sta);
1840 ath_node_detach(sc, sta);
1845 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1846 struct ieee80211_vif *vif,
1847 enum sta_notify_cmd cmd,
1848 struct ieee80211_sta *sta)
1850 struct ath_softc *sc = hw->priv;
1851 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1854 case STA_NOTIFY_SLEEP:
1855 an->sleeping = true;
1856 if (ath_tx_aggr_sleep(sc, an))
1857 ieee80211_sta_set_tim(sta);
1859 case STA_NOTIFY_AWAKE:
1860 an->sleeping = false;
1861 ath_tx_aggr_wakeup(sc, an);
1866 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1867 const struct ieee80211_tx_queue_params *params)
1869 struct ath_softc *sc = hw->priv;
1870 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1871 struct ath_txq *txq;
1872 struct ath9k_tx_queue_info qi;
1875 if (queue >= WME_NUM_AC)
1878 txq = sc->tx.txq_map[queue];
1880 ath9k_ps_wakeup(sc);
1881 mutex_lock(&sc->mutex);
1883 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1885 qi.tqi_aifs = params->aifs;
1886 qi.tqi_cwmin = params->cw_min;
1887 qi.tqi_cwmax = params->cw_max;
1888 qi.tqi_burstTime = params->txop;
1890 ath_dbg(common, ATH_DBG_CONFIG,
1891 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1892 queue, txq->axq_qnum, params->aifs, params->cw_min,
1893 params->cw_max, params->txop);
1895 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1897 ath_err(common, "TXQ Update failed\n");
1899 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1900 if (queue == WME_AC_BE && !ret)
1901 ath_beaconq_config(sc);
1903 mutex_unlock(&sc->mutex);
1904 ath9k_ps_restore(sc);
1909 static int ath9k_set_key(struct ieee80211_hw *hw,
1910 enum set_key_cmd cmd,
1911 struct ieee80211_vif *vif,
1912 struct ieee80211_sta *sta,
1913 struct ieee80211_key_conf *key)
1915 struct ath_softc *sc = hw->priv;
1916 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1919 if (ath9k_modparam_nohwcrypt)
1922 if (vif->type == NL80211_IFTYPE_ADHOC &&
1923 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1924 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1925 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1927 * For now, disable hw crypto for the RSN IBSS group keys. This
1928 * could be optimized in the future to use a modified key cache
1929 * design to support per-STA RX GTK, but until that gets
1930 * implemented, use of software crypto for group addressed
1931 * frames is a acceptable to allow RSN IBSS to be used.
1936 mutex_lock(&sc->mutex);
1937 ath9k_ps_wakeup(sc);
1938 ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1943 ath9k_del_ps_key(sc, vif, sta);
1945 ret = ath_key_config(common, vif, sta, key);
1947 key->hw_key_idx = ret;
1948 /* push IV and Michael MIC generation to stack */
1949 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1950 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1951 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1952 if (sc->sc_ah->sw_mgmt_crypto &&
1953 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1954 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1959 ath_key_delete(common, key);
1965 ath9k_ps_restore(sc);
1966 mutex_unlock(&sc->mutex);
1970 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1972 struct ath_softc *sc = data;
1973 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1974 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1975 struct ath_vif *avp = (void *)vif->drv_priv;
1978 * Skip iteration if primary station vif's bss info
1981 if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1984 if (bss_conf->assoc) {
1985 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1986 avp->primary_sta_vif = true;
1987 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1988 common->curaid = bss_conf->aid;
1989 ath9k_hw_write_associd(sc->sc_ah);
1990 ath_dbg(common, ATH_DBG_CONFIG,
1991 "Bss Info ASSOC %d, bssid: %pM\n",
1992 bss_conf->aid, common->curbssid);
1993 ath_beacon_config(sc, vif);
1995 * Request a re-configuration of Beacon related timers
1996 * on the receipt of the first Beacon frame (i.e.,
1997 * after time sync with the AP).
1999 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
2000 /* Reset rssi stats */
2001 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
2002 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2004 if (!common->disable_ani) {
2005 sc->sc_flags |= SC_OP_ANI_RUN;
2006 ath_start_ani(common);
2012 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
2014 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2015 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2016 struct ath_vif *avp = (void *)vif->drv_priv;
2018 if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
2021 /* Reconfigure bss info */
2022 if (avp->primary_sta_vif && !bss_conf->assoc) {
2023 ath_dbg(common, ATH_DBG_CONFIG,
2024 "Bss Info DISASSOC %d, bssid %pM\n",
2025 common->curaid, common->curbssid);
2026 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2027 avp->primary_sta_vif = false;
2028 memset(common->curbssid, 0, ETH_ALEN);
2032 ieee80211_iterate_active_interfaces_atomic(
2033 sc->hw, ath9k_bss_iter, sc);
2036 * None of station vifs are associated.
2039 if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2040 ath9k_hw_write_associd(sc->sc_ah);
2042 sc->sc_flags &= ~SC_OP_ANI_RUN;
2043 del_timer_sync(&common->ani.timer);
2047 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2048 struct ieee80211_vif *vif,
2049 struct ieee80211_bss_conf *bss_conf,
2052 struct ath_softc *sc = hw->priv;
2053 struct ath_hw *ah = sc->sc_ah;
2054 struct ath_common *common = ath9k_hw_common(ah);
2055 struct ath_vif *avp = (void *)vif->drv_priv;
2059 ath9k_ps_wakeup(sc);
2060 mutex_lock(&sc->mutex);
2062 if (changed & BSS_CHANGED_BSSID) {
2063 ath9k_config_bss(sc, vif);
2065 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2066 common->curbssid, common->curaid);
2069 if (changed & BSS_CHANGED_IBSS) {
2070 /* There can be only one vif available */
2071 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2072 common->curaid = bss_conf->aid;
2073 ath9k_hw_write_associd(sc->sc_ah);
2075 if (bss_conf->ibss_joined) {
2076 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2078 if (!common->disable_ani) {
2079 sc->sc_flags |= SC_OP_ANI_RUN;
2080 ath_start_ani(common);
2084 sc->sc_flags &= ~SC_OP_ANI_RUN;
2085 del_timer_sync(&common->ani.timer);
2089 /* Enable transmission of beacons (AP, IBSS, MESH) */
2090 if ((changed & BSS_CHANGED_BEACON) ||
2091 ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2092 ath9k_set_beaconing_status(sc, false);
2093 error = ath_beacon_alloc(sc, vif);
2095 ath_beacon_config(sc, vif);
2096 ath9k_set_beaconing_status(sc, true);
2099 if (changed & BSS_CHANGED_ERP_SLOT) {
2100 if (bss_conf->use_short_slot)
2104 if (vif->type == NL80211_IFTYPE_AP) {
2106 * Defer update, so that connected stations can adjust
2107 * their settings at the same time.
2108 * See beacon.c for more details
2110 sc->beacon.slottime = slottime;
2111 sc->beacon.updateslot = UPDATE;
2113 ah->slottime = slottime;
2114 ath9k_hw_init_global_settings(ah);
2118 /* Disable transmission of beacons */
2119 if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2120 !bss_conf->enable_beacon) {
2121 ath9k_set_beaconing_status(sc, false);
2122 avp->is_bslot_active = false;
2123 ath9k_set_beaconing_status(sc, true);
2126 if (changed & BSS_CHANGED_BEACON_INT) {
2128 * In case of AP mode, the HW TSF has to be reset
2129 * when the beacon interval changes.
2131 if (vif->type == NL80211_IFTYPE_AP) {
2132 sc->sc_flags |= SC_OP_TSF_RESET;
2133 ath9k_set_beaconing_status(sc, false);
2134 error = ath_beacon_alloc(sc, vif);
2136 ath_beacon_config(sc, vif);
2137 ath9k_set_beaconing_status(sc, true);
2139 ath_beacon_config(sc, vif);
2142 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2143 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2144 bss_conf->use_short_preamble);
2145 if (bss_conf->use_short_preamble)
2146 sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2148 sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2151 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2152 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2153 bss_conf->use_cts_prot);
2154 if (bss_conf->use_cts_prot &&
2155 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2156 sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2158 sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2161 mutex_unlock(&sc->mutex);
2162 ath9k_ps_restore(sc);
2165 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2167 struct ath_softc *sc = hw->priv;
2170 mutex_lock(&sc->mutex);
2171 ath9k_ps_wakeup(sc);
2172 tsf = ath9k_hw_gettsf64(sc->sc_ah);
2173 ath9k_ps_restore(sc);
2174 mutex_unlock(&sc->mutex);
2179 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2181 struct ath_softc *sc = hw->priv;
2183 mutex_lock(&sc->mutex);
2184 ath9k_ps_wakeup(sc);
2185 ath9k_hw_settsf64(sc->sc_ah, tsf);
2186 ath9k_ps_restore(sc);
2187 mutex_unlock(&sc->mutex);
2190 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2192 struct ath_softc *sc = hw->priv;
2194 mutex_lock(&sc->mutex);
2196 ath9k_ps_wakeup(sc);
2197 ath9k_hw_reset_tsf(sc->sc_ah);
2198 ath9k_ps_restore(sc);
2200 mutex_unlock(&sc->mutex);
2203 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2204 struct ieee80211_vif *vif,
2205 enum ieee80211_ampdu_mlme_action action,
2206 struct ieee80211_sta *sta,
2207 u16 tid, u16 *ssn, u8 buf_size)
2209 struct ath_softc *sc = hw->priv;
2215 case IEEE80211_AMPDU_RX_START:
2216 if (!(sc->sc_flags & SC_OP_RXAGGR))
2219 case IEEE80211_AMPDU_RX_STOP:
2221 case IEEE80211_AMPDU_TX_START:
2222 if (!(sc->sc_flags & SC_OP_TXAGGR))
2225 ath9k_ps_wakeup(sc);
2226 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2228 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2229 ath9k_ps_restore(sc);
2231 case IEEE80211_AMPDU_TX_STOP:
2232 ath9k_ps_wakeup(sc);
2233 ath_tx_aggr_stop(sc, sta, tid);
2234 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2235 ath9k_ps_restore(sc);
2237 case IEEE80211_AMPDU_TX_OPERATIONAL:
2238 ath9k_ps_wakeup(sc);
2239 ath_tx_aggr_resume(sc, sta, tid);
2240 ath9k_ps_restore(sc);
2243 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2251 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2252 struct survey_info *survey)
2254 struct ath_softc *sc = hw->priv;
2255 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2256 struct ieee80211_supported_band *sband;
2257 struct ieee80211_channel *chan;
2258 unsigned long flags;
2261 spin_lock_irqsave(&common->cc_lock, flags);
2263 ath_update_survey_stats(sc);
2265 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2266 if (sband && idx >= sband->n_channels) {
2267 idx -= sband->n_channels;
2272 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2274 if (!sband || idx >= sband->n_channels) {
2275 spin_unlock_irqrestore(&common->cc_lock, flags);
2279 chan = &sband->channels[idx];
2280 pos = chan->hw_value;
2281 memcpy(survey, &sc->survey[pos], sizeof(*survey));
2282 survey->channel = chan;
2283 spin_unlock_irqrestore(&common->cc_lock, flags);
2288 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2290 struct ath_softc *sc = hw->priv;
2291 struct ath_hw *ah = sc->sc_ah;
2293 mutex_lock(&sc->mutex);
2294 ah->coverage_class = coverage_class;
2295 ath9k_hw_init_global_settings(ah);
2296 mutex_unlock(&sc->mutex);
2299 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2301 struct ath_softc *sc = hw->priv;
2302 struct ath_hw *ah = sc->sc_ah;
2303 struct ath_common *common = ath9k_hw_common(ah);
2304 int timeout = 200; /* ms */
2308 mutex_lock(&sc->mutex);
2309 cancel_delayed_work_sync(&sc->tx_complete_work);
2311 if (sc->sc_flags & SC_OP_INVALID) {
2312 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2313 mutex_unlock(&sc->mutex);
2320 for (j = 0; j < timeout; j++) {
2324 usleep_range(1000, 2000);
2326 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2327 if (!ATH_TXQ_SETUP(sc, i))
2330 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2340 ath9k_ps_wakeup(sc);
2341 spin_lock_bh(&sc->sc_pcu_lock);
2342 drain_txq = ath_drain_all_txq(sc, false);
2344 ath_reset(sc, false);
2345 spin_unlock_bh(&sc->sc_pcu_lock);
2346 ath9k_ps_restore(sc);
2347 ieee80211_wake_queues(hw);
2350 ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2351 mutex_unlock(&sc->mutex);
2354 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2356 struct ath_softc *sc = hw->priv;
2359 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2360 if (!ATH_TXQ_SETUP(sc, i))
2363 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2369 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2371 struct ath_softc *sc = hw->priv;
2372 struct ath_hw *ah = sc->sc_ah;
2373 struct ieee80211_vif *vif;
2374 struct ath_vif *avp;
2376 struct ath_tx_status ts;
2379 vif = sc->beacon.bslot[0];
2383 avp = (void *)vif->drv_priv;
2384 if (!avp->is_bslot_active)
2387 if (!sc->beacon.tx_processed) {
2388 tasklet_disable(&sc->bcon_tasklet);
2391 if (!bf || !bf->bf_mpdu)
2394 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2395 if (status == -EINPROGRESS)
2398 sc->beacon.tx_processed = true;
2399 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2402 tasklet_enable(&sc->bcon_tasklet);
2405 return sc->beacon.tx_last;
2408 static int ath9k_get_stats(struct ieee80211_hw *hw,
2409 struct ieee80211_low_level_stats *stats)
2411 struct ath_softc *sc = hw->priv;
2412 struct ath_hw *ah = sc->sc_ah;
2413 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2415 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2416 stats->dot11RTSFailureCount = mib_stats->rts_bad;
2417 stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2418 stats->dot11RTSSuccessCount = mib_stats->rts_good;
2422 struct ieee80211_ops ath9k_ops = {
2424 .start = ath9k_start,
2426 .add_interface = ath9k_add_interface,
2427 .change_interface = ath9k_change_interface,
2428 .remove_interface = ath9k_remove_interface,
2429 .config = ath9k_config,
2430 .configure_filter = ath9k_configure_filter,
2431 .sta_add = ath9k_sta_add,
2432 .sta_remove = ath9k_sta_remove,
2433 .sta_notify = ath9k_sta_notify,
2434 .conf_tx = ath9k_conf_tx,
2435 .bss_info_changed = ath9k_bss_info_changed,
2436 .set_key = ath9k_set_key,
2437 .get_tsf = ath9k_get_tsf,
2438 .set_tsf = ath9k_set_tsf,
2439 .reset_tsf = ath9k_reset_tsf,
2440 .ampdu_action = ath9k_ampdu_action,
2441 .get_survey = ath9k_get_survey,
2442 .rfkill_poll = ath9k_rfkill_poll_state,
2443 .set_coverage_class = ath9k_set_coverage_class,
2444 .flush = ath9k_flush,
2445 .tx_frames_pending = ath9k_tx_frames_pending,
2446 .tx_last_beacon = ath9k_tx_last_beacon,
2447 .get_stats = ath9k_get_stats,