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_work_sync(&sc->hw_reset_work);
240 cancel_delayed_work_sync(&sc->tx_complete_work);
241 cancel_delayed_work_sync(&sc->hw_pll_work);
245 spin_lock_bh(&sc->sc_pcu_lock);
248 * This is only performed if the channel settings have
251 * To switch channels clear any pending DMA operations;
252 * wait long enough for the RX fifo to drain, reset the
253 * hardware at the new frequency, and then re-enable
254 * the relevant bits of the h/w.
256 ath9k_hw_disable_interrupts(ah);
257 stopped = ath_drain_all_txq(sc, false);
259 if (!ath_stoprecv(sc))
262 if (!ath9k_hw_check_alive(ah))
265 /* XXX: do not flush receive queue here. We don't want
266 * to flush data frames already in queue because of
267 * changing channel. */
269 if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
272 if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
273 caldata = &sc->caldata;
275 ath_dbg(common, ATH_DBG_CONFIG,
276 "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n",
277 sc->sc_ah->curchan->channel,
278 channel->center_freq, conf_is_ht40(conf),
281 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
284 "Unable to reset channel (%u MHz), reset status %d\n",
285 channel->center_freq, r);
289 if (ath_startrecv(sc) != 0) {
290 ath_err(common, "Unable to restart recv logic\n");
295 ath9k_cmn_update_txpow(ah, sc->curtxpow,
296 sc->config.txpowlimit, &sc->curtxpow);
297 ath9k_hw_set_interrupts(ah, ah->imask);
298 ath9k_hw_enable_interrupts(ah);
300 if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) {
301 if (sc->sc_flags & SC_OP_BEACONS)
303 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
304 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2);
305 if (!common->disable_ani)
306 ath_start_ani(common);
310 ieee80211_wake_queues(hw);
312 spin_unlock_bh(&sc->sc_pcu_lock);
314 ath9k_ps_restore(sc);
318 static void ath_paprd_activate(struct ath_softc *sc)
320 struct ath_hw *ah = sc->sc_ah;
321 struct ath9k_hw_cal_data *caldata = ah->caldata;
324 if (!caldata || !caldata->paprd_done)
328 ar9003_paprd_enable(ah, false);
329 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
330 if (!(ah->txchainmask & BIT(chain)))
333 ar9003_paprd_populate_single_table(ah, caldata, chain);
336 ar9003_paprd_enable(ah, true);
337 ath9k_ps_restore(sc);
340 static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
342 struct ieee80211_hw *hw = sc->hw;
343 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
344 struct ath_hw *ah = sc->sc_ah;
345 struct ath_common *common = ath9k_hw_common(ah);
346 struct ath_tx_control txctl;
349 memset(&txctl, 0, sizeof(txctl));
350 txctl.txq = sc->tx.txq_map[WME_AC_BE];
352 memset(tx_info, 0, sizeof(*tx_info));
353 tx_info->band = hw->conf.channel->band;
354 tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
355 tx_info->control.rates[0].idx = 0;
356 tx_info->control.rates[0].count = 1;
357 tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
358 tx_info->control.rates[1].idx = -1;
360 init_completion(&sc->paprd_complete);
361 txctl.paprd = BIT(chain);
363 if (ath_tx_start(hw, skb, &txctl) != 0) {
364 ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n");
365 dev_kfree_skb_any(skb);
369 time_left = wait_for_completion_timeout(&sc->paprd_complete,
370 msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
373 ath_dbg(common, ATH_DBG_CALIBRATE,
374 "Timeout waiting for paprd training on TX chain %d\n",
380 void ath_paprd_calibrate(struct work_struct *work)
382 struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
383 struct ieee80211_hw *hw = sc->hw;
384 struct ath_hw *ah = sc->sc_ah;
385 struct ieee80211_hdr *hdr;
386 struct sk_buff *skb = NULL;
387 struct ath9k_hw_cal_data *caldata = ah->caldata;
388 struct ath_common *common = ath9k_hw_common(ah);
399 if (ar9003_paprd_init_table(ah) < 0)
402 skb = alloc_skb(len, GFP_KERNEL);
407 memset(skb->data, 0, len);
408 hdr = (struct ieee80211_hdr *)skb->data;
409 ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
410 hdr->frame_control = cpu_to_le16(ftype);
411 hdr->duration_id = cpu_to_le16(10);
412 memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
413 memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
414 memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
416 for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
417 if (!(ah->txchainmask & BIT(chain)))
422 ath_dbg(common, ATH_DBG_CALIBRATE,
423 "Sending PAPRD frame for thermal measurement "
424 "on chain %d\n", chain);
425 if (!ath_paprd_send_frame(sc, skb, chain))
428 ar9003_paprd_setup_gain_table(ah, chain);
430 ath_dbg(common, ATH_DBG_CALIBRATE,
431 "Sending PAPRD training frame on chain %d\n", chain);
432 if (!ath_paprd_send_frame(sc, skb, chain))
435 if (!ar9003_paprd_is_done(ah)) {
436 ath_dbg(common, ATH_DBG_CALIBRATE,
437 "PAPRD not yet done on chain %d\n", chain);
441 if (ar9003_paprd_create_curve(ah, caldata, chain)) {
442 ath_dbg(common, ATH_DBG_CALIBRATE,
443 "PAPRD create curve failed on chain %d\n",
453 caldata->paprd_done = true;
454 ath_paprd_activate(sc);
458 ath9k_ps_restore(sc);
462 * This routine performs the periodic noise floor calibration function
463 * that is used to adjust and optimize the chip performance. This
464 * takes environmental changes (location, temperature) into account.
465 * When the task is complete, it reschedules itself depending on the
466 * appropriate interval that was calculated.
468 void ath_ani_calibrate(unsigned long data)
470 struct ath_softc *sc = (struct ath_softc *)data;
471 struct ath_hw *ah = sc->sc_ah;
472 struct ath_common *common = ath9k_hw_common(ah);
473 bool longcal = false;
474 bool shortcal = false;
475 bool aniflag = false;
476 unsigned int timestamp = jiffies_to_msecs(jiffies);
477 u32 cal_interval, short_cal_interval, long_cal_interval;
480 if (ah->caldata && ah->caldata->nfcal_interference)
481 long_cal_interval = ATH_LONG_CALINTERVAL_INT;
483 long_cal_interval = ATH_LONG_CALINTERVAL;
485 short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
486 ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
488 /* Only calibrate if awake */
489 if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
494 /* Long calibration runs independently of short calibration. */
495 if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
497 ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
498 common->ani.longcal_timer = timestamp;
501 /* Short calibration applies only while caldone is false */
502 if (!common->ani.caldone) {
503 if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
505 ath_dbg(common, ATH_DBG_ANI,
506 "shortcal @%lu\n", jiffies);
507 common->ani.shortcal_timer = timestamp;
508 common->ani.resetcal_timer = timestamp;
511 if ((timestamp - common->ani.resetcal_timer) >=
512 ATH_RESTART_CALINTERVAL) {
513 common->ani.caldone = ath9k_hw_reset_calvalid(ah);
514 if (common->ani.caldone)
515 common->ani.resetcal_timer = timestamp;
519 /* Verify whether we must check ANI */
520 if ((timestamp - common->ani.checkani_timer) >=
521 ah->config.ani_poll_interval) {
523 common->ani.checkani_timer = timestamp;
526 /* Call ANI routine if necessary */
528 spin_lock_irqsave(&common->cc_lock, flags);
529 ath9k_hw_ani_monitor(ah, ah->curchan);
530 ath_update_survey_stats(sc);
531 spin_unlock_irqrestore(&common->cc_lock, flags);
534 /* Perform calibration if necessary */
535 if (longcal || shortcal) {
536 common->ani.caldone =
537 ath9k_hw_calibrate(ah, ah->curchan,
538 ah->rxchainmask, longcal);
541 ath9k_ps_restore(sc);
545 * Set timer interval based on previous results.
546 * The interval must be the shortest necessary to satisfy ANI,
547 * short calibration and long calibration.
549 ath9k_debug_samp_bb_mac(sc);
550 cal_interval = ATH_LONG_CALINTERVAL;
551 if (sc->sc_ah->config.enable_ani)
552 cal_interval = min(cal_interval,
553 (u32)ah->config.ani_poll_interval);
554 if (!common->ani.caldone)
555 cal_interval = min(cal_interval, (u32)short_cal_interval);
557 mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
558 if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
559 if (!ah->caldata->paprd_done)
560 ieee80211_queue_work(sc->hw, &sc->paprd_work);
561 else if (!ah->paprd_table_write_done)
562 ath_paprd_activate(sc);
566 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
569 an = (struct ath_node *)sta->drv_priv;
571 #ifdef CONFIG_ATH9K_DEBUGFS
572 spin_lock(&sc->nodes_lock);
573 list_add(&an->list, &sc->nodes);
574 spin_unlock(&sc->nodes_lock);
577 if (sc->sc_flags & SC_OP_TXAGGR) {
578 ath_tx_node_init(sc, an);
579 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
580 sta->ht_cap.ampdu_factor);
581 an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
585 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
587 struct ath_node *an = (struct ath_node *)sta->drv_priv;
589 #ifdef CONFIG_ATH9K_DEBUGFS
590 spin_lock(&sc->nodes_lock);
592 spin_unlock(&sc->nodes_lock);
596 if (sc->sc_flags & SC_OP_TXAGGR)
597 ath_tx_node_cleanup(sc, an);
601 void ath9k_tasklet(unsigned long data)
603 struct ath_softc *sc = (struct ath_softc *)data;
604 struct ath_hw *ah = sc->sc_ah;
605 struct ath_common *common = ath9k_hw_common(ah);
607 u32 status = sc->intrstatus;
610 if ((status & ATH9K_INT_FATAL) ||
611 (status & ATH9K_INT_BB_WATCHDOG)) {
612 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
617 spin_lock(&sc->sc_pcu_lock);
620 * Only run the baseband hang check if beacons stop working in AP or
621 * IBSS mode, because it has a high false positive rate. For station
622 * mode it should not be necessary, since the upper layers will detect
623 * this through a beacon miss automatically and the following channel
624 * change will trigger a hardware reset anyway
626 if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 &&
627 !ath9k_hw_check_alive(ah))
628 ieee80211_queue_work(sc->hw, &sc->hw_check_work);
630 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
632 * TSF sync does not look correct; remain awake to sync with
635 ath_dbg(common, ATH_DBG_PS,
636 "TSFOOR - Sync with next Beacon\n");
637 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
640 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
641 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
644 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
646 if (status & rxmask) {
647 /* Check for high priority Rx first */
648 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
649 (status & ATH9K_INT_RXHP))
650 ath_rx_tasklet(sc, 0, true);
652 ath_rx_tasklet(sc, 0, false);
655 if (status & ATH9K_INT_TX) {
656 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
657 ath_tx_edma_tasklet(sc);
662 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
663 if (status & ATH9K_INT_GENTIMER)
664 ath_gen_timer_isr(sc->sc_ah);
666 /* re-enable hardware interrupt */
667 ath9k_hw_enable_interrupts(ah);
669 spin_unlock(&sc->sc_pcu_lock);
670 ath9k_ps_restore(sc);
673 irqreturn_t ath_isr(int irq, void *dev)
675 #define SCHED_INTR ( \
677 ATH9K_INT_BB_WATCHDOG | \
689 struct ath_softc *sc = dev;
690 struct ath_hw *ah = sc->sc_ah;
691 struct ath_common *common = ath9k_hw_common(ah);
692 enum ath9k_int status;
696 * The hardware is not ready/present, don't
697 * touch anything. Note this can happen early
698 * on if the IRQ is shared.
700 if (sc->sc_flags & SC_OP_INVALID)
704 /* shared irq, not for us */
706 if (!ath9k_hw_intrpend(ah))
710 * Figure out the reason(s) for the interrupt. Note
711 * that the hal returns a pseudo-ISR that may include
712 * bits we haven't explicitly enabled so we mask the
713 * value to insure we only process bits we requested.
715 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
716 status &= ah->imask; /* discard unasked-for bits */
719 * If there are no status bits set, then this interrupt was not
720 * for me (should have been caught above).
725 /* Cache the status */
726 sc->intrstatus = status;
728 if (status & SCHED_INTR)
732 * If a FATAL or RXORN interrupt is received, we have to reset the
735 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
736 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
739 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
740 (status & ATH9K_INT_BB_WATCHDOG)) {
742 spin_lock(&common->cc_lock);
743 ath_hw_cycle_counters_update(common);
744 ar9003_hw_bb_watchdog_dbg_info(ah);
745 spin_unlock(&common->cc_lock);
750 if (status & ATH9K_INT_SWBA)
751 tasklet_schedule(&sc->bcon_tasklet);
753 if (status & ATH9K_INT_TXURN)
754 ath9k_hw_updatetxtriglevel(ah, true);
756 if (status & ATH9K_INT_RXEOL) {
757 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
758 ath9k_hw_set_interrupts(ah, ah->imask);
761 if (status & ATH9K_INT_MIB) {
763 * Disable interrupts until we service the MIB
764 * interrupt; otherwise it will continue to
767 ath9k_hw_disable_interrupts(ah);
769 * Let the hal handle the event. We assume
770 * it will clear whatever condition caused
773 spin_lock(&common->cc_lock);
774 ath9k_hw_proc_mib_event(ah);
775 spin_unlock(&common->cc_lock);
776 ath9k_hw_enable_interrupts(ah);
779 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
780 if (status & ATH9K_INT_TIM_TIMER) {
781 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
783 /* Clear RxAbort bit so that we can
785 ath9k_setpower(sc, ATH9K_PM_AWAKE);
786 ath9k_hw_setrxabort(sc->sc_ah, 0);
787 sc->ps_flags |= PS_WAIT_FOR_BEACON;
792 ath_debug_stat_interrupt(sc, status);
795 /* turn off every interrupt */
796 ath9k_hw_disable_interrupts(ah);
797 tasklet_schedule(&sc->intr_tq);
805 static void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
807 struct ath_hw *ah = sc->sc_ah;
808 struct ath_common *common = ath9k_hw_common(ah);
809 struct ieee80211_channel *channel = hw->conf.channel;
813 spin_lock_bh(&sc->sc_pcu_lock);
814 atomic_set(&ah->intr_ref_cnt, -1);
816 ath9k_hw_configpcipowersave(ah, false);
819 ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah);
821 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
824 "Unable to reset channel (%u MHz), reset status %d\n",
825 channel->center_freq, r);
828 ath9k_cmn_update_txpow(ah, sc->curtxpow,
829 sc->config.txpowlimit, &sc->curtxpow);
830 if (ath_startrecv(sc) != 0) {
831 ath_err(common, "Unable to restart recv logic\n");
834 if (sc->sc_flags & SC_OP_BEACONS)
835 ath_set_beacon(sc); /* restart beacons */
837 /* Re-Enable interrupts */
838 ath9k_hw_set_interrupts(ah, ah->imask);
839 ath9k_hw_enable_interrupts(ah);
842 ath9k_hw_cfg_output(ah, ah->led_pin,
843 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
844 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
846 ieee80211_wake_queues(hw);
847 ieee80211_queue_delayed_work(hw, &sc->hw_pll_work, HZ/2);
850 spin_unlock_bh(&sc->sc_pcu_lock);
852 ath9k_ps_restore(sc);
855 void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
857 struct ath_hw *ah = sc->sc_ah;
858 struct ieee80211_channel *channel = hw->conf.channel;
862 cancel_delayed_work_sync(&sc->hw_pll_work);
864 spin_lock_bh(&sc->sc_pcu_lock);
866 ieee80211_stop_queues(hw);
869 * Keep the LED on when the radio is disabled
870 * during idle unassociated state.
873 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
874 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
877 /* Disable interrupts */
878 ath9k_hw_disable_interrupts(ah);
880 ath_drain_all_txq(sc, false); /* clear pending tx frames */
882 ath_stoprecv(sc); /* turn off frame recv */
883 ath_flushrecv(sc); /* flush recv queue */
886 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
888 r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
890 ath_err(ath9k_hw_common(sc->sc_ah),
891 "Unable to reset channel (%u MHz), reset status %d\n",
892 channel->center_freq, r);
895 ath9k_hw_phy_disable(ah);
897 ath9k_hw_configpcipowersave(ah, true);
899 spin_unlock_bh(&sc->sc_pcu_lock);
900 ath9k_ps_restore(sc);
903 static int ath_reset(struct ath_softc *sc, bool retry_tx)
905 struct ath_hw *ah = sc->sc_ah;
906 struct ath_common *common = ath9k_hw_common(ah);
907 struct ieee80211_hw *hw = sc->hw;
910 sc->hw_busy_count = 0;
912 ath9k_debug_samp_bb_mac(sc);
915 del_timer_sync(&common->ani.timer);
919 ieee80211_stop_queues(hw);
921 ath9k_hw_disable_interrupts(ah);
922 ath_drain_all_txq(sc, retry_tx);
927 r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false);
930 "Unable to reset hardware; reset status %d\n", r);
932 if (ath_startrecv(sc) != 0)
933 ath_err(common, "Unable to start recv logic\n");
936 * We may be doing a reset in response to a request
937 * that changes the channel so update any state that
938 * might change as a result.
940 ath9k_cmn_update_txpow(ah, sc->curtxpow,
941 sc->config.txpowlimit, &sc->curtxpow);
943 if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
944 ath_set_beacon(sc); /* restart beacons */
946 ath9k_hw_set_interrupts(ah, ah->imask);
947 ath9k_hw_enable_interrupts(ah);
951 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
952 if (ATH_TXQ_SETUP(sc, i)) {
953 spin_lock_bh(&sc->tx.txq[i].axq_lock);
954 ath_txq_schedule(sc, &sc->tx.txq[i]);
955 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
960 ieee80211_wake_queues(hw);
963 if (!common->disable_ani)
964 ath_start_ani(common);
966 ath9k_ps_restore(sc);
971 void ath_reset_work(struct work_struct *work)
973 struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
975 spin_lock_bh(&sc->sc_pcu_lock);
977 spin_unlock_bh(&sc->sc_pcu_lock);
980 void ath_hw_check(struct work_struct *work)
982 struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work);
983 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
988 if (ath9k_hw_check_alive(sc->sc_ah))
991 spin_lock_irqsave(&common->cc_lock, flags);
992 busy = ath_update_survey_stats(sc);
993 spin_unlock_irqrestore(&common->cc_lock, flags);
995 ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, "
996 "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1);
998 if (++sc->hw_busy_count >= 3) {
999 spin_lock_bh(&sc->sc_pcu_lock);
1000 ath_reset(sc, true);
1001 spin_unlock_bh(&sc->sc_pcu_lock);
1004 } else if (busy >= 0)
1005 sc->hw_busy_count = 0;
1008 ath9k_ps_restore(sc);
1011 static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
1014 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1016 if (pll_sqsum >= 0x40000) {
1019 /* Rx is hung for more than 500ms. Reset it */
1020 ath_dbg(common, ATH_DBG_RESET,
1021 "Possible RX hang, resetting");
1022 spin_lock_bh(&sc->sc_pcu_lock);
1023 ath_reset(sc, true);
1024 spin_unlock_bh(&sc->sc_pcu_lock);
1031 void ath_hw_pll_work(struct work_struct *work)
1033 struct ath_softc *sc = container_of(work, struct ath_softc,
1037 if (AR_SREV_9485(sc->sc_ah)) {
1039 ath9k_ps_wakeup(sc);
1040 pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
1041 ath9k_ps_restore(sc);
1043 ath_hw_pll_rx_hang_check(sc, pll_sqsum);
1045 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
1049 /**********************/
1050 /* mac80211 callbacks */
1051 /**********************/
1053 static int ath9k_start(struct ieee80211_hw *hw)
1055 struct ath_softc *sc = hw->priv;
1056 struct ath_hw *ah = sc->sc_ah;
1057 struct ath_common *common = ath9k_hw_common(ah);
1058 struct ieee80211_channel *curchan = hw->conf.channel;
1059 struct ath9k_channel *init_channel;
1062 ath_dbg(common, ATH_DBG_CONFIG,
1063 "Starting driver with initial channel: %d MHz\n",
1064 curchan->center_freq);
1066 ath9k_ps_wakeup(sc);
1068 mutex_lock(&sc->mutex);
1070 /* setup initial channel */
1071 sc->chan_idx = curchan->hw_value;
1073 init_channel = ath9k_cmn_get_curchannel(hw, ah);
1075 /* Reset SERDES registers */
1076 ath9k_hw_configpcipowersave(ah, false);
1079 * The basic interface to setting the hardware in a good
1080 * state is ``reset''. On return the hardware is known to
1081 * be powered up and with interrupts disabled. This must
1082 * be followed by initialization of the appropriate bits
1083 * and then setup of the interrupt mask.
1085 spin_lock_bh(&sc->sc_pcu_lock);
1086 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
1089 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
1090 r, curchan->center_freq);
1091 spin_unlock_bh(&sc->sc_pcu_lock);
1096 * This is needed only to setup initial state
1097 * but it's best done after a reset.
1099 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1100 sc->config.txpowlimit, &sc->curtxpow);
1103 * Setup the hardware after reset:
1104 * The receive engine is set going.
1105 * Frame transmit is handled entirely
1106 * in the frame output path; there's nothing to do
1107 * here except setup the interrupt mask.
1109 if (ath_startrecv(sc) != 0) {
1110 ath_err(common, "Unable to start recv logic\n");
1112 spin_unlock_bh(&sc->sc_pcu_lock);
1115 spin_unlock_bh(&sc->sc_pcu_lock);
1117 /* Setup our intr mask. */
1118 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
1119 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
1122 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
1123 ah->imask |= ATH9K_INT_RXHP |
1125 ATH9K_INT_BB_WATCHDOG;
1127 ah->imask |= ATH9K_INT_RX;
1129 ah->imask |= ATH9K_INT_GTT;
1131 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
1132 ah->imask |= ATH9K_INT_CST;
1134 sc->sc_flags &= ~SC_OP_INVALID;
1135 sc->sc_ah->is_monitoring = false;
1137 /* Disable BMISS interrupt when we're not associated */
1138 ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
1139 ath9k_hw_set_interrupts(ah, ah->imask);
1140 ath9k_hw_enable_interrupts(ah);
1142 ieee80211_wake_queues(hw);
1144 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
1146 if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
1147 !ah->btcoex_hw.enabled) {
1148 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
1149 AR_STOMP_LOW_WLAN_WGHT);
1150 ath9k_hw_btcoex_enable(ah);
1152 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1153 ath9k_btcoex_timer_resume(sc);
1156 if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
1157 common->bus_ops->extn_synch_en(common);
1160 mutex_unlock(&sc->mutex);
1162 ath9k_ps_restore(sc);
1167 static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1169 struct ath_softc *sc = hw->priv;
1170 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1171 struct ath_tx_control txctl;
1172 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1174 if (sc->ps_enabled) {
1176 * mac80211 does not set PM field for normal data frames, so we
1177 * need to update that based on the current PS mode.
1179 if (ieee80211_is_data(hdr->frame_control) &&
1180 !ieee80211_is_nullfunc(hdr->frame_control) &&
1181 !ieee80211_has_pm(hdr->frame_control)) {
1182 ath_dbg(common, ATH_DBG_PS,
1183 "Add PM=1 for a TX frame while in PS mode\n");
1184 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1188 if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
1190 * We are using PS-Poll and mac80211 can request TX while in
1191 * power save mode. Need to wake up hardware for the TX to be
1192 * completed and if needed, also for RX of buffered frames.
1194 ath9k_ps_wakeup(sc);
1195 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
1196 ath9k_hw_setrxabort(sc->sc_ah, 0);
1197 if (ieee80211_is_pspoll(hdr->frame_control)) {
1198 ath_dbg(common, ATH_DBG_PS,
1199 "Sending PS-Poll to pick a buffered frame\n");
1200 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
1202 ath_dbg(common, ATH_DBG_PS,
1203 "Wake up to complete TX\n");
1204 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
1207 * The actual restore operation will happen only after
1208 * the sc_flags bit is cleared. We are just dropping
1209 * the ps_usecount here.
1211 ath9k_ps_restore(sc);
1214 memset(&txctl, 0, sizeof(struct ath_tx_control));
1215 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
1217 ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
1219 if (ath_tx_start(hw, skb, &txctl) != 0) {
1220 ath_dbg(common, ATH_DBG_XMIT, "TX failed\n");
1226 dev_kfree_skb_any(skb);
1229 static void ath9k_stop(struct ieee80211_hw *hw)
1231 struct ath_softc *sc = hw->priv;
1232 struct ath_hw *ah = sc->sc_ah;
1233 struct ath_common *common = ath9k_hw_common(ah);
1235 mutex_lock(&sc->mutex);
1237 cancel_delayed_work_sync(&sc->tx_complete_work);
1238 cancel_delayed_work_sync(&sc->hw_pll_work);
1239 cancel_work_sync(&sc->paprd_work);
1240 cancel_work_sync(&sc->hw_check_work);
1241 cancel_work_sync(&sc->hw_reset_work);
1243 if (sc->sc_flags & SC_OP_INVALID) {
1244 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
1245 mutex_unlock(&sc->mutex);
1249 /* Ensure HW is awake when we try to shut it down. */
1250 ath9k_ps_wakeup(sc);
1252 if (ah->btcoex_hw.enabled) {
1253 ath9k_hw_btcoex_disable(ah);
1254 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
1255 ath9k_btcoex_timer_pause(sc);
1258 spin_lock_bh(&sc->sc_pcu_lock);
1260 /* prevent tasklets to enable interrupts once we disable them */
1261 ah->imask &= ~ATH9K_INT_GLOBAL;
1263 /* make sure h/w will not generate any interrupt
1264 * before setting the invalid flag. */
1265 ath9k_hw_disable_interrupts(ah);
1267 if (!(sc->sc_flags & SC_OP_INVALID)) {
1268 ath_drain_all_txq(sc, false);
1270 ath9k_hw_phy_disable(ah);
1272 sc->rx.rxlink = NULL;
1275 dev_kfree_skb_any(sc->rx.frag);
1279 /* disable HAL and put h/w to sleep */
1280 ath9k_hw_disable(ah);
1282 spin_unlock_bh(&sc->sc_pcu_lock);
1284 /* we can now sync irq and kill any running tasklets, since we already
1285 * disabled interrupts and not holding a spin lock */
1286 synchronize_irq(sc->irq);
1287 tasklet_kill(&sc->intr_tq);
1288 tasklet_kill(&sc->bcon_tasklet);
1290 ath9k_ps_restore(sc);
1293 ath_radio_disable(sc, hw);
1295 sc->sc_flags |= SC_OP_INVALID;
1297 mutex_unlock(&sc->mutex);
1299 ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n");
1302 bool ath9k_uses_beacons(int type)
1305 case NL80211_IFTYPE_AP:
1306 case NL80211_IFTYPE_ADHOC:
1307 case NL80211_IFTYPE_MESH_POINT:
1314 static void ath9k_reclaim_beacon(struct ath_softc *sc,
1315 struct ieee80211_vif *vif)
1317 struct ath_vif *avp = (void *)vif->drv_priv;
1319 ath9k_set_beaconing_status(sc, false);
1320 ath_beacon_return(sc, avp);
1321 ath9k_set_beaconing_status(sc, true);
1322 sc->sc_flags &= ~SC_OP_BEACONS;
1325 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1327 struct ath9k_vif_iter_data *iter_data = data;
1330 if (iter_data->hw_macaddr)
1331 for (i = 0; i < ETH_ALEN; i++)
1332 iter_data->mask[i] &=
1333 ~(iter_data->hw_macaddr[i] ^ mac[i]);
1335 switch (vif->type) {
1336 case NL80211_IFTYPE_AP:
1339 case NL80211_IFTYPE_STATION:
1340 iter_data->nstations++;
1342 case NL80211_IFTYPE_ADHOC:
1343 iter_data->nadhocs++;
1345 case NL80211_IFTYPE_MESH_POINT:
1346 iter_data->nmeshes++;
1348 case NL80211_IFTYPE_WDS:
1352 iter_data->nothers++;
1357 /* Called with sc->mutex held. */
1358 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1359 struct ieee80211_vif *vif,
1360 struct ath9k_vif_iter_data *iter_data)
1362 struct ath_softc *sc = hw->priv;
1363 struct ath_hw *ah = sc->sc_ah;
1364 struct ath_common *common = ath9k_hw_common(ah);
1367 * Use the hardware MAC address as reference, the hardware uses it
1368 * together with the BSSID mask when matching addresses.
1370 memset(iter_data, 0, sizeof(*iter_data));
1371 iter_data->hw_macaddr = common->macaddr;
1372 memset(&iter_data->mask, 0xff, ETH_ALEN);
1375 ath9k_vif_iter(iter_data, vif->addr, vif);
1377 /* Get list of all active MAC addresses */
1378 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
1382 /* Called with sc->mutex held. */
1383 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1384 struct ieee80211_vif *vif)
1386 struct ath_softc *sc = hw->priv;
1387 struct ath_hw *ah = sc->sc_ah;
1388 struct ath_common *common = ath9k_hw_common(ah);
1389 struct ath9k_vif_iter_data iter_data;
1391 ath9k_calculate_iter_data(hw, vif, &iter_data);
1393 /* Set BSSID mask. */
1394 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1395 ath_hw_setbssidmask(common);
1397 /* Set op-mode & TSF */
1398 if (iter_data.naps > 0) {
1399 ath9k_hw_set_tsfadjust(ah, 1);
1400 sc->sc_flags |= SC_OP_TSF_RESET;
1401 ah->opmode = NL80211_IFTYPE_AP;
1403 ath9k_hw_set_tsfadjust(ah, 0);
1404 sc->sc_flags &= ~SC_OP_TSF_RESET;
1406 if (iter_data.nmeshes)
1407 ah->opmode = NL80211_IFTYPE_MESH_POINT;
1408 else if (iter_data.nwds)
1409 ah->opmode = NL80211_IFTYPE_AP;
1410 else if (iter_data.nadhocs)
1411 ah->opmode = NL80211_IFTYPE_ADHOC;
1413 ah->opmode = NL80211_IFTYPE_STATION;
1417 * Enable MIB interrupts when there are hardware phy counters.
1419 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) {
1420 if (ah->config.enable_ani)
1421 ah->imask |= ATH9K_INT_MIB;
1422 ah->imask |= ATH9K_INT_TSFOOR;
1424 ah->imask &= ~ATH9K_INT_MIB;
1425 ah->imask &= ~ATH9K_INT_TSFOOR;
1428 ath9k_hw_set_interrupts(ah, ah->imask);
1431 if (iter_data.naps > 0) {
1432 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1434 if (!common->disable_ani) {
1435 sc->sc_flags |= SC_OP_ANI_RUN;
1436 ath_start_ani(common);
1440 sc->sc_flags &= ~SC_OP_ANI_RUN;
1441 del_timer_sync(&common->ani.timer);
1445 /* Called with sc->mutex held, vif counts set up properly. */
1446 static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
1447 struct ieee80211_vif *vif)
1449 struct ath_softc *sc = hw->priv;
1451 ath9k_calculate_summary_state(hw, vif);
1453 if (ath9k_uses_beacons(vif->type)) {
1455 /* This may fail because upper levels do not have beacons
1456 * properly configured yet. That's OK, we assume it
1457 * will be properly configured and then we will be notified
1458 * in the info_changed method and set up beacons properly
1461 ath9k_set_beaconing_status(sc, false);
1462 error = ath_beacon_alloc(sc, vif);
1464 ath_beacon_config(sc, vif);
1465 ath9k_set_beaconing_status(sc, true);
1470 static int ath9k_add_interface(struct ieee80211_hw *hw,
1471 struct ieee80211_vif *vif)
1473 struct ath_softc *sc = hw->priv;
1474 struct ath_hw *ah = sc->sc_ah;
1475 struct ath_common *common = ath9k_hw_common(ah);
1478 ath9k_ps_wakeup(sc);
1479 mutex_lock(&sc->mutex);
1481 switch (vif->type) {
1482 case NL80211_IFTYPE_STATION:
1483 case NL80211_IFTYPE_WDS:
1484 case NL80211_IFTYPE_ADHOC:
1485 case NL80211_IFTYPE_AP:
1486 case NL80211_IFTYPE_MESH_POINT:
1489 ath_err(common, "Interface type %d not yet supported\n",
1495 if (ath9k_uses_beacons(vif->type)) {
1496 if (sc->nbcnvifs >= ATH_BCBUF) {
1497 ath_err(common, "Not enough beacon buffers when adding"
1498 " new interface of type: %i\n",
1505 if ((ah->opmode == NL80211_IFTYPE_ADHOC) ||
1506 ((vif->type == NL80211_IFTYPE_ADHOC) &&
1508 ath_err(common, "Cannot create ADHOC interface when other"
1509 " interfaces already exist.\n");
1514 ath_dbg(common, ATH_DBG_CONFIG,
1515 "Attach a VIF of type: %d\n", vif->type);
1519 ath9k_do_vif_add_setup(hw, vif);
1521 mutex_unlock(&sc->mutex);
1522 ath9k_ps_restore(sc);
1526 static int ath9k_change_interface(struct ieee80211_hw *hw,
1527 struct ieee80211_vif *vif,
1528 enum nl80211_iftype new_type,
1531 struct ath_softc *sc = hw->priv;
1532 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1535 ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
1536 mutex_lock(&sc->mutex);
1537 ath9k_ps_wakeup(sc);
1539 /* See if new interface type is valid. */
1540 if ((new_type == NL80211_IFTYPE_ADHOC) &&
1542 ath_err(common, "When using ADHOC, it must be the only"
1548 if (ath9k_uses_beacons(new_type) &&
1549 !ath9k_uses_beacons(vif->type)) {
1550 if (sc->nbcnvifs >= ATH_BCBUF) {
1551 ath_err(common, "No beacon slot available\n");
1557 /* Clean up old vif stuff */
1558 if (ath9k_uses_beacons(vif->type))
1559 ath9k_reclaim_beacon(sc, vif);
1561 /* Add new settings */
1562 vif->type = new_type;
1565 ath9k_do_vif_add_setup(hw, vif);
1567 ath9k_ps_restore(sc);
1568 mutex_unlock(&sc->mutex);
1572 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1573 struct ieee80211_vif *vif)
1575 struct ath_softc *sc = hw->priv;
1576 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1578 ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
1580 ath9k_ps_wakeup(sc);
1581 mutex_lock(&sc->mutex);
1585 /* Reclaim beacon resources */
1586 if (ath9k_uses_beacons(vif->type))
1587 ath9k_reclaim_beacon(sc, vif);
1589 ath9k_calculate_summary_state(hw, NULL);
1591 mutex_unlock(&sc->mutex);
1592 ath9k_ps_restore(sc);
1595 static void ath9k_enable_ps(struct ath_softc *sc)
1597 struct ath_hw *ah = sc->sc_ah;
1599 sc->ps_enabled = true;
1600 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1601 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1602 ah->imask |= ATH9K_INT_TIM_TIMER;
1603 ath9k_hw_set_interrupts(ah, ah->imask);
1605 ath9k_hw_setrxabort(ah, 1);
1609 static void ath9k_disable_ps(struct ath_softc *sc)
1611 struct ath_hw *ah = sc->sc_ah;
1613 sc->ps_enabled = false;
1614 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1615 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1616 ath9k_hw_setrxabort(ah, 0);
1617 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1619 PS_WAIT_FOR_PSPOLL_DATA |
1620 PS_WAIT_FOR_TX_ACK);
1621 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1622 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1623 ath9k_hw_set_interrupts(ah, ah->imask);
1629 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1631 struct ath_softc *sc = hw->priv;
1632 struct ath_hw *ah = sc->sc_ah;
1633 struct ath_common *common = ath9k_hw_common(ah);
1634 struct ieee80211_conf *conf = &hw->conf;
1635 bool disable_radio = false;
1637 mutex_lock(&sc->mutex);
1640 * Leave this as the first check because we need to turn on the
1641 * radio if it was disabled before prior to processing the rest
1642 * of the changes. Likewise we must only disable the radio towards
1645 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1646 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1648 ath_radio_enable(sc, hw);
1649 ath_dbg(common, ATH_DBG_CONFIG,
1650 "not-idle: enabling radio\n");
1652 disable_radio = true;
1657 * We just prepare to enable PS. We have to wait until our AP has
1658 * ACK'd our null data frame to disable RX otherwise we'll ignore
1659 * those ACKs and end up retransmitting the same null data frames.
1660 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1662 if (changed & IEEE80211_CONF_CHANGE_PS) {
1663 unsigned long flags;
1664 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1665 if (conf->flags & IEEE80211_CONF_PS)
1666 ath9k_enable_ps(sc);
1668 ath9k_disable_ps(sc);
1669 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1672 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1673 if (conf->flags & IEEE80211_CONF_MONITOR) {
1674 ath_dbg(common, ATH_DBG_CONFIG,
1675 "Monitor mode is enabled\n");
1676 sc->sc_ah->is_monitoring = true;
1678 ath_dbg(common, ATH_DBG_CONFIG,
1679 "Monitor mode is disabled\n");
1680 sc->sc_ah->is_monitoring = false;
1684 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1685 struct ieee80211_channel *curchan = hw->conf.channel;
1686 struct ath9k_channel old_chan;
1687 int pos = curchan->hw_value;
1689 unsigned long flags;
1692 old_pos = ah->curchan - &ah->channels[0];
1694 if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
1695 sc->sc_flags |= SC_OP_OFFCHANNEL;
1697 sc->sc_flags &= ~SC_OP_OFFCHANNEL;
1699 ath_dbg(common, ATH_DBG_CONFIG,
1700 "Set channel: %d MHz type: %d\n",
1701 curchan->center_freq, conf->channel_type);
1703 /* update survey stats for the old channel before switching */
1704 spin_lock_irqsave(&common->cc_lock, flags);
1705 ath_update_survey_stats(sc);
1706 spin_unlock_irqrestore(&common->cc_lock, flags);
1709 * Preserve the current channel values, before updating
1712 if (old_pos == pos) {
1713 memcpy(&old_chan, &sc->sc_ah->channels[pos],
1714 sizeof(struct ath9k_channel));
1715 ah->curchan = &old_chan;
1718 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1719 curchan, conf->channel_type);
1722 * If the operating channel changes, change the survey in-use flags
1724 * Reset the survey data for the new channel, unless we're switching
1725 * back to the operating channel from an off-channel operation.
1727 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1728 sc->cur_survey != &sc->survey[pos]) {
1731 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1733 sc->cur_survey = &sc->survey[pos];
1735 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1736 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1737 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1738 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1741 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1742 ath_err(common, "Unable to set channel\n");
1743 mutex_unlock(&sc->mutex);
1748 * The most recent snapshot of channel->noisefloor for the old
1749 * channel is only available after the hardware reset. Copy it to
1750 * the survey stats now.
1753 ath_update_survey_nf(sc, old_pos);
1756 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1757 ath_dbg(common, ATH_DBG_CONFIG,
1758 "Set power: %d\n", conf->power_level);
1759 sc->config.txpowlimit = 2 * conf->power_level;
1760 ath9k_ps_wakeup(sc);
1761 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1762 sc->config.txpowlimit, &sc->curtxpow);
1763 ath9k_ps_restore(sc);
1766 if (disable_radio) {
1767 ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
1768 ath_radio_disable(sc, hw);
1771 mutex_unlock(&sc->mutex);
1776 #define SUPPORTED_FILTERS \
1777 (FIF_PROMISC_IN_BSS | \
1782 FIF_BCN_PRBRESP_PROMISC | \
1786 /* FIXME: sc->sc_full_reset ? */
1787 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1788 unsigned int changed_flags,
1789 unsigned int *total_flags,
1792 struct ath_softc *sc = hw->priv;
1795 changed_flags &= SUPPORTED_FILTERS;
1796 *total_flags &= SUPPORTED_FILTERS;
1798 sc->rx.rxfilter = *total_flags;
1799 ath9k_ps_wakeup(sc);
1800 rfilt = ath_calcrxfilter(sc);
1801 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1802 ath9k_ps_restore(sc);
1804 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
1805 "Set HW RX filter: 0x%x\n", rfilt);
1808 static int ath9k_sta_add(struct ieee80211_hw *hw,
1809 struct ieee80211_vif *vif,
1810 struct ieee80211_sta *sta)
1812 struct ath_softc *sc = hw->priv;
1813 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1814 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1815 struct ieee80211_key_conf ps_key = { };
1817 ath_node_attach(sc, sta);
1819 if (vif->type != NL80211_IFTYPE_AP &&
1820 vif->type != NL80211_IFTYPE_AP_VLAN)
1823 an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1828 static void ath9k_del_ps_key(struct ath_softc *sc,
1829 struct ieee80211_vif *vif,
1830 struct ieee80211_sta *sta)
1832 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1833 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1834 struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1839 ath_key_delete(common, &ps_key);
1842 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1843 struct ieee80211_vif *vif,
1844 struct ieee80211_sta *sta)
1846 struct ath_softc *sc = hw->priv;
1848 ath9k_del_ps_key(sc, vif, sta);
1849 ath_node_detach(sc, sta);
1854 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1855 struct ieee80211_vif *vif,
1856 enum sta_notify_cmd cmd,
1857 struct ieee80211_sta *sta)
1859 struct ath_softc *sc = hw->priv;
1860 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1863 case STA_NOTIFY_SLEEP:
1864 an->sleeping = true;
1865 if (ath_tx_aggr_sleep(sc, an))
1866 ieee80211_sta_set_tim(sta);
1868 case STA_NOTIFY_AWAKE:
1869 an->sleeping = false;
1870 ath_tx_aggr_wakeup(sc, an);
1875 static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
1876 const struct ieee80211_tx_queue_params *params)
1878 struct ath_softc *sc = hw->priv;
1879 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1880 struct ath_txq *txq;
1881 struct ath9k_tx_queue_info qi;
1884 if (queue >= WME_NUM_AC)
1887 txq = sc->tx.txq_map[queue];
1889 ath9k_ps_wakeup(sc);
1890 mutex_lock(&sc->mutex);
1892 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1894 qi.tqi_aifs = params->aifs;
1895 qi.tqi_cwmin = params->cw_min;
1896 qi.tqi_cwmax = params->cw_max;
1897 qi.tqi_burstTime = params->txop;
1899 ath_dbg(common, ATH_DBG_CONFIG,
1900 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1901 queue, txq->axq_qnum, params->aifs, params->cw_min,
1902 params->cw_max, params->txop);
1904 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1906 ath_err(common, "TXQ Update failed\n");
1908 if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
1909 if (queue == WME_AC_BE && !ret)
1910 ath_beaconq_config(sc);
1912 mutex_unlock(&sc->mutex);
1913 ath9k_ps_restore(sc);
1918 static int ath9k_set_key(struct ieee80211_hw *hw,
1919 enum set_key_cmd cmd,
1920 struct ieee80211_vif *vif,
1921 struct ieee80211_sta *sta,
1922 struct ieee80211_key_conf *key)
1924 struct ath_softc *sc = hw->priv;
1925 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1928 if (ath9k_modparam_nohwcrypt)
1931 if (vif->type == NL80211_IFTYPE_ADHOC &&
1932 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1933 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1934 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1936 * For now, disable hw crypto for the RSN IBSS group keys. This
1937 * could be optimized in the future to use a modified key cache
1938 * design to support per-STA RX GTK, but until that gets
1939 * implemented, use of software crypto for group addressed
1940 * frames is a acceptable to allow RSN IBSS to be used.
1945 mutex_lock(&sc->mutex);
1946 ath9k_ps_wakeup(sc);
1947 ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n");
1952 ath9k_del_ps_key(sc, vif, sta);
1954 ret = ath_key_config(common, vif, sta, key);
1956 key->hw_key_idx = ret;
1957 /* push IV and Michael MIC generation to stack */
1958 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1959 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1960 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1961 if (sc->sc_ah->sw_mgmt_crypto &&
1962 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1963 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
1968 ath_key_delete(common, key);
1974 ath9k_ps_restore(sc);
1975 mutex_unlock(&sc->mutex);
1979 static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1981 struct ath_softc *sc = data;
1982 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1983 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1984 struct ath_vif *avp = (void *)vif->drv_priv;
1987 * Skip iteration if primary station vif's bss info
1990 if (sc->sc_flags & SC_OP_PRIM_STA_VIF)
1993 if (bss_conf->assoc) {
1994 sc->sc_flags |= SC_OP_PRIM_STA_VIF;
1995 avp->primary_sta_vif = true;
1996 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1997 common->curaid = bss_conf->aid;
1998 ath9k_hw_write_associd(sc->sc_ah);
1999 ath_dbg(common, ATH_DBG_CONFIG,
2000 "Bss Info ASSOC %d, bssid: %pM\n",
2001 bss_conf->aid, common->curbssid);
2002 ath_beacon_config(sc, vif);
2004 * Request a re-configuration of Beacon related timers
2005 * on the receipt of the first Beacon frame (i.e.,
2006 * after time sync with the AP).
2008 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
2009 /* Reset rssi stats */
2010 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
2011 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2013 if (!common->disable_ani) {
2014 sc->sc_flags |= SC_OP_ANI_RUN;
2015 ath_start_ani(common);
2021 static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
2023 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2024 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2025 struct ath_vif *avp = (void *)vif->drv_priv;
2027 if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
2030 /* Reconfigure bss info */
2031 if (avp->primary_sta_vif && !bss_conf->assoc) {
2032 ath_dbg(common, ATH_DBG_CONFIG,
2033 "Bss Info DISASSOC %d, bssid %pM\n",
2034 common->curaid, common->curbssid);
2035 sc->sc_flags &= ~(SC_OP_PRIM_STA_VIF | SC_OP_BEACONS);
2036 avp->primary_sta_vif = false;
2037 memset(common->curbssid, 0, ETH_ALEN);
2041 ieee80211_iterate_active_interfaces_atomic(
2042 sc->hw, ath9k_bss_iter, sc);
2045 * None of station vifs are associated.
2048 if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) {
2049 ath9k_hw_write_associd(sc->sc_ah);
2051 sc->sc_flags &= ~SC_OP_ANI_RUN;
2052 del_timer_sync(&common->ani.timer);
2056 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
2057 struct ieee80211_vif *vif,
2058 struct ieee80211_bss_conf *bss_conf,
2061 struct ath_softc *sc = hw->priv;
2062 struct ath_hw *ah = sc->sc_ah;
2063 struct ath_common *common = ath9k_hw_common(ah);
2064 struct ath_vif *avp = (void *)vif->drv_priv;
2068 ath9k_ps_wakeup(sc);
2069 mutex_lock(&sc->mutex);
2071 if (changed & BSS_CHANGED_BSSID) {
2072 ath9k_config_bss(sc, vif);
2074 ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n",
2075 common->curbssid, common->curaid);
2078 if (changed & BSS_CHANGED_IBSS) {
2079 /* There can be only one vif available */
2080 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2081 common->curaid = bss_conf->aid;
2082 ath9k_hw_write_associd(sc->sc_ah);
2084 if (bss_conf->ibss_joined) {
2085 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
2087 if (!common->disable_ani) {
2088 sc->sc_flags |= SC_OP_ANI_RUN;
2089 ath_start_ani(common);
2093 sc->sc_flags &= ~SC_OP_ANI_RUN;
2094 del_timer_sync(&common->ani.timer);
2098 /* Enable transmission of beacons (AP, IBSS, MESH) */
2099 if ((changed & BSS_CHANGED_BEACON) ||
2100 ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
2101 ath9k_set_beaconing_status(sc, false);
2102 error = ath_beacon_alloc(sc, vif);
2104 ath_beacon_config(sc, vif);
2105 ath9k_set_beaconing_status(sc, true);
2108 if (changed & BSS_CHANGED_ERP_SLOT) {
2109 if (bss_conf->use_short_slot)
2113 if (vif->type == NL80211_IFTYPE_AP) {
2115 * Defer update, so that connected stations can adjust
2116 * their settings at the same time.
2117 * See beacon.c for more details
2119 sc->beacon.slottime = slottime;
2120 sc->beacon.updateslot = UPDATE;
2122 ah->slottime = slottime;
2123 ath9k_hw_init_global_settings(ah);
2127 /* Disable transmission of beacons */
2128 if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
2129 !bss_conf->enable_beacon) {
2130 ath9k_set_beaconing_status(sc, false);
2131 avp->is_bslot_active = false;
2132 ath9k_set_beaconing_status(sc, true);
2135 if (changed & BSS_CHANGED_BEACON_INT) {
2137 * In case of AP mode, the HW TSF has to be reset
2138 * when the beacon interval changes.
2140 if (vif->type == NL80211_IFTYPE_AP) {
2141 sc->sc_flags |= SC_OP_TSF_RESET;
2142 ath9k_set_beaconing_status(sc, false);
2143 error = ath_beacon_alloc(sc, vif);
2145 ath_beacon_config(sc, vif);
2146 ath9k_set_beaconing_status(sc, true);
2148 ath_beacon_config(sc, vif);
2151 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
2152 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
2153 bss_conf->use_short_preamble);
2154 if (bss_conf->use_short_preamble)
2155 sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
2157 sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
2160 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
2161 ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
2162 bss_conf->use_cts_prot);
2163 if (bss_conf->use_cts_prot &&
2164 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
2165 sc->sc_flags |= SC_OP_PROTECT_ENABLE;
2167 sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
2170 mutex_unlock(&sc->mutex);
2171 ath9k_ps_restore(sc);
2174 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
2176 struct ath_softc *sc = hw->priv;
2179 mutex_lock(&sc->mutex);
2180 ath9k_ps_wakeup(sc);
2181 tsf = ath9k_hw_gettsf64(sc->sc_ah);
2182 ath9k_ps_restore(sc);
2183 mutex_unlock(&sc->mutex);
2188 static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
2190 struct ath_softc *sc = hw->priv;
2192 mutex_lock(&sc->mutex);
2193 ath9k_ps_wakeup(sc);
2194 ath9k_hw_settsf64(sc->sc_ah, tsf);
2195 ath9k_ps_restore(sc);
2196 mutex_unlock(&sc->mutex);
2199 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
2201 struct ath_softc *sc = hw->priv;
2203 mutex_lock(&sc->mutex);
2205 ath9k_ps_wakeup(sc);
2206 ath9k_hw_reset_tsf(sc->sc_ah);
2207 ath9k_ps_restore(sc);
2209 mutex_unlock(&sc->mutex);
2212 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
2213 struct ieee80211_vif *vif,
2214 enum ieee80211_ampdu_mlme_action action,
2215 struct ieee80211_sta *sta,
2216 u16 tid, u16 *ssn, u8 buf_size)
2218 struct ath_softc *sc = hw->priv;
2224 case IEEE80211_AMPDU_RX_START:
2225 if (!(sc->sc_flags & SC_OP_RXAGGR))
2228 case IEEE80211_AMPDU_RX_STOP:
2230 case IEEE80211_AMPDU_TX_START:
2231 if (!(sc->sc_flags & SC_OP_TXAGGR))
2234 ath9k_ps_wakeup(sc);
2235 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
2237 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2238 ath9k_ps_restore(sc);
2240 case IEEE80211_AMPDU_TX_STOP:
2241 ath9k_ps_wakeup(sc);
2242 ath_tx_aggr_stop(sc, sta, tid);
2243 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2244 ath9k_ps_restore(sc);
2246 case IEEE80211_AMPDU_TX_OPERATIONAL:
2247 ath9k_ps_wakeup(sc);
2248 ath_tx_aggr_resume(sc, sta, tid);
2249 ath9k_ps_restore(sc);
2252 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
2260 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
2261 struct survey_info *survey)
2263 struct ath_softc *sc = hw->priv;
2264 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2265 struct ieee80211_supported_band *sband;
2266 struct ieee80211_channel *chan;
2267 unsigned long flags;
2270 spin_lock_irqsave(&common->cc_lock, flags);
2272 ath_update_survey_stats(sc);
2274 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
2275 if (sband && idx >= sband->n_channels) {
2276 idx -= sband->n_channels;
2281 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
2283 if (!sband || idx >= sband->n_channels) {
2284 spin_unlock_irqrestore(&common->cc_lock, flags);
2288 chan = &sband->channels[idx];
2289 pos = chan->hw_value;
2290 memcpy(survey, &sc->survey[pos], sizeof(*survey));
2291 survey->channel = chan;
2292 spin_unlock_irqrestore(&common->cc_lock, flags);
2297 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
2299 struct ath_softc *sc = hw->priv;
2300 struct ath_hw *ah = sc->sc_ah;
2302 mutex_lock(&sc->mutex);
2303 ah->coverage_class = coverage_class;
2304 ath9k_hw_init_global_settings(ah);
2305 mutex_unlock(&sc->mutex);
2308 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
2310 struct ath_softc *sc = hw->priv;
2311 struct ath_hw *ah = sc->sc_ah;
2312 struct ath_common *common = ath9k_hw_common(ah);
2313 int timeout = 200; /* ms */
2317 mutex_lock(&sc->mutex);
2318 cancel_delayed_work_sync(&sc->tx_complete_work);
2320 if (sc->sc_flags & SC_OP_INVALID) {
2321 ath_dbg(common, ATH_DBG_ANY, "Device not present\n");
2322 mutex_unlock(&sc->mutex);
2329 for (j = 0; j < timeout; j++) {
2333 usleep_range(1000, 2000);
2335 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2336 if (!ATH_TXQ_SETUP(sc, i))
2339 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2349 ath9k_ps_wakeup(sc);
2350 spin_lock_bh(&sc->sc_pcu_lock);
2351 drain_txq = ath_drain_all_txq(sc, false);
2353 ath_reset(sc, false);
2354 spin_unlock_bh(&sc->sc_pcu_lock);
2355 ath9k_ps_restore(sc);
2356 ieee80211_wake_queues(hw);
2359 ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2360 mutex_unlock(&sc->mutex);
2363 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2365 struct ath_softc *sc = hw->priv;
2368 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2369 if (!ATH_TXQ_SETUP(sc, i))
2372 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2378 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2380 struct ath_softc *sc = hw->priv;
2381 struct ath_hw *ah = sc->sc_ah;
2382 struct ieee80211_vif *vif;
2383 struct ath_vif *avp;
2385 struct ath_tx_status ts;
2388 vif = sc->beacon.bslot[0];
2392 avp = (void *)vif->drv_priv;
2393 if (!avp->is_bslot_active)
2396 if (!sc->beacon.tx_processed) {
2397 tasklet_disable(&sc->bcon_tasklet);
2400 if (!bf || !bf->bf_mpdu)
2403 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2404 if (status == -EINPROGRESS)
2407 sc->beacon.tx_processed = true;
2408 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2411 tasklet_enable(&sc->bcon_tasklet);
2414 return sc->beacon.tx_last;
2417 static int ath9k_get_stats(struct ieee80211_hw *hw,
2418 struct ieee80211_low_level_stats *stats)
2420 struct ath_softc *sc = hw->priv;
2421 struct ath_hw *ah = sc->sc_ah;
2422 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2424 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2425 stats->dot11RTSFailureCount = mib_stats->rts_bad;
2426 stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2427 stats->dot11RTSSuccessCount = mib_stats->rts_good;
2431 struct ieee80211_ops ath9k_ops = {
2433 .start = ath9k_start,
2435 .add_interface = ath9k_add_interface,
2436 .change_interface = ath9k_change_interface,
2437 .remove_interface = ath9k_remove_interface,
2438 .config = ath9k_config,
2439 .configure_filter = ath9k_configure_filter,
2440 .sta_add = ath9k_sta_add,
2441 .sta_remove = ath9k_sta_remove,
2442 .sta_notify = ath9k_sta_notify,
2443 .conf_tx = ath9k_conf_tx,
2444 .bss_info_changed = ath9k_bss_info_changed,
2445 .set_key = ath9k_set_key,
2446 .get_tsf = ath9k_get_tsf,
2447 .set_tsf = ath9k_set_tsf,
2448 .reset_tsf = ath9k_reset_tsf,
2449 .ampdu_action = ath9k_ampdu_action,
2450 .get_survey = ath9k_get_survey,
2451 .rfkill_poll = ath9k_rfkill_poll_state,
2452 .set_coverage_class = ath9k_set_coverage_class,
2453 .flush = ath9k_flush,
2454 .tx_frames_pending = ath9k_tx_frames_pending,
2455 .tx_last_beacon = ath9k_tx_last_beacon,
2456 .get_stats = ath9k_get_stats,