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 void ath9k_set_assoc_state(struct ath_softc *sc,
23 struct ieee80211_vif *vif);
25 u8 ath9k_parse_mpdudensity(u8 mpdudensity)
28 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
29 * 0 for no restriction
38 switch (mpdudensity) {
44 /* Our lower layer calculations limit our precision to
60 static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
64 spin_lock_bh(&txq->axq_lock);
66 if (txq->axq_depth || !list_empty(&txq->axq_acq))
69 spin_unlock_bh(&txq->axq_lock);
73 static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
78 spin_lock_irqsave(&sc->sc_pm_lock, flags);
79 ret = ath9k_hw_setpower(sc->sc_ah, mode);
80 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
85 void ath_ps_full_sleep(unsigned long data)
87 struct ath_softc *sc = (struct ath_softc *) data;
88 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
91 spin_lock(&common->cc_lock);
92 ath_hw_cycle_counters_update(common);
93 spin_unlock(&common->cc_lock);
95 ath9k_hw_setrxabort(sc->sc_ah, 1);
96 ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
98 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
101 void ath9k_ps_wakeup(struct ath_softc *sc)
103 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
105 enum ath9k_power_mode power_mode;
107 spin_lock_irqsave(&sc->sc_pm_lock, flags);
108 if (++sc->ps_usecount != 1)
111 del_timer_sync(&sc->sleep_timer);
112 power_mode = sc->sc_ah->power_mode;
113 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
116 * While the hardware is asleep, the cycle counters contain no
117 * useful data. Better clear them now so that they don't mess up
118 * survey data results.
120 if (power_mode != ATH9K_PM_AWAKE) {
121 spin_lock(&common->cc_lock);
122 ath_hw_cycle_counters_update(common);
123 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
124 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
125 spin_unlock(&common->cc_lock);
129 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
132 void ath9k_ps_restore(struct ath_softc *sc)
134 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
135 enum ath9k_power_mode mode;
138 spin_lock_irqsave(&sc->sc_pm_lock, flags);
139 if (--sc->ps_usecount != 0)
143 mod_timer(&sc->sleep_timer, jiffies + HZ / 10);
147 if (sc->ps_enabled &&
148 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
150 PS_WAIT_FOR_PSPOLL_DATA |
153 mode = ATH9K_PM_NETWORK_SLEEP;
154 if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
155 ath9k_btcoex_stop_gen_timer(sc);
160 spin_lock(&common->cc_lock);
161 ath_hw_cycle_counters_update(common);
162 spin_unlock(&common->cc_lock);
164 ath9k_hw_setpower(sc->sc_ah, mode);
167 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
170 static void __ath_cancel_work(struct ath_softc *sc)
172 cancel_work_sync(&sc->paprd_work);
173 cancel_delayed_work_sync(&sc->tx_complete_work);
174 cancel_delayed_work_sync(&sc->hw_pll_work);
176 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
177 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
178 cancel_work_sync(&sc->mci_work);
182 void ath_cancel_work(struct ath_softc *sc)
184 __ath_cancel_work(sc);
185 cancel_work_sync(&sc->hw_reset_work);
188 void ath_restart_work(struct ath_softc *sc)
190 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
192 if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah))
193 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
194 msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
199 static bool ath_prepare_reset(struct ath_softc *sc)
201 struct ath_hw *ah = sc->sc_ah;
204 ieee80211_stop_queues(sc->hw);
206 ath9k_hw_disable_interrupts(ah);
208 if (!ath_drain_all_txq(sc))
211 if (!ath_stoprecv(sc))
217 static bool ath_complete_reset(struct ath_softc *sc, bool start)
219 struct ath_hw *ah = sc->sc_ah;
220 struct ath_common *common = ath9k_hw_common(ah);
224 if (ath_startrecv(sc) != 0) {
225 ath_err(common, "Unable to restart recv logic\n");
229 ath9k_cmn_update_txpow(ah, sc->curtxpow,
230 sc->config.txpowlimit, &sc->curtxpow);
232 clear_bit(ATH_OP_HW_RESET, &common->op_flags);
233 ath9k_hw_set_interrupts(ah);
234 ath9k_hw_enable_interrupts(ah);
236 if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) {
237 if (!test_bit(ATH_OP_BEACONS, &common->op_flags))
240 if (ah->opmode == NL80211_IFTYPE_STATION &&
241 test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
242 spin_lock_irqsave(&sc->sc_pm_lock, flags);
243 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
244 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
246 ath9k_set_beacon(sc);
249 ath_restart_work(sc);
251 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
252 if (!ATH_TXQ_SETUP(sc, i))
255 spin_lock_bh(&sc->tx.txq[i].axq_lock);
256 ath_txq_schedule(sc, &sc->tx.txq[i]);
257 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
262 ieee80211_wake_queues(sc->hw);
264 ath9k_p2p_ps_timer(sc);
269 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
271 struct ath_hw *ah = sc->sc_ah;
272 struct ath_common *common = ath9k_hw_common(ah);
273 struct ath9k_hw_cal_data *caldata = NULL;
277 __ath_cancel_work(sc);
279 tasklet_disable(&sc->intr_tq);
280 spin_lock_bh(&sc->sc_pcu_lock);
282 if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
284 caldata = &sc->caldata;
292 if (!ath_prepare_reset(sc))
295 ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
296 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
298 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
301 "Unable to reset channel, reset status %d\n", r);
303 ath9k_hw_enable_interrupts(ah);
304 ath9k_queue_reset(sc, RESET_TYPE_BB_HANG);
309 if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
310 (sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL))
311 ath9k_mci_set_txpower(sc, true, false);
313 if (!ath_complete_reset(sc, true))
317 spin_unlock_bh(&sc->sc_pcu_lock);
318 tasklet_enable(&sc->intr_tq);
325 * Set/change channels. If the channel is really being changed, it's done
326 * by reseting the chip. To accomplish this we must first cleanup any pending
327 * DMA, then restart stuff.
329 static int ath_set_channel(struct ath_softc *sc, struct cfg80211_chan_def *chandef)
331 struct ath_hw *ah = sc->sc_ah;
332 struct ath_common *common = ath9k_hw_common(ah);
333 struct ieee80211_hw *hw = sc->hw;
334 struct ath9k_channel *hchan;
335 struct ieee80211_channel *chan = chandef->chan;
337 int pos = chan->hw_value;
341 if (test_bit(ATH_OP_INVALID, &common->op_flags))
344 offchannel = !!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL);
347 old_pos = ah->curchan - &ah->channels[0];
349 ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n",
350 chan->center_freq, chandef->width);
352 /* update survey stats for the old channel before switching */
353 spin_lock_bh(&common->cc_lock);
354 ath_update_survey_stats(sc);
355 spin_unlock_bh(&common->cc_lock);
357 ath9k_cmn_get_channel(hw, ah, chandef);
360 * If the operating channel changes, change the survey in-use flags
362 * Reset the survey data for the new channel, unless we're switching
363 * back to the operating channel from an off-channel operation.
365 if (!offchannel && sc->cur_survey != &sc->survey[pos]) {
367 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
369 sc->cur_survey = &sc->survey[pos];
371 memset(sc->cur_survey, 0, sizeof(struct survey_info));
372 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
373 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
374 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
377 hchan = &sc->sc_ah->channels[pos];
378 r = ath_reset_internal(sc, hchan);
383 * The most recent snapshot of channel->noisefloor for the old
384 * channel is only available after the hardware reset. Copy it to
385 * the survey stats now.
388 ath_update_survey_nf(sc, old_pos);
391 * Enable radar pulse detection if on a DFS channel. Spectral
392 * scanning and radar detection can not be used concurrently.
394 if (hw->conf.radar_enabled) {
397 /* set HW specific DFS configuration */
398 ath9k_hw_set_radar_params(ah);
399 rxfilter = ath9k_hw_getrxfilter(ah);
400 rxfilter |= ATH9K_RX_FILTER_PHYRADAR |
401 ATH9K_RX_FILTER_PHYERR;
402 ath9k_hw_setrxfilter(ah, rxfilter);
403 ath_dbg(common, DFS, "DFS enabled at freq %d\n",
406 /* perform spectral scan if requested. */
407 if (test_bit(ATH_OP_SCANNING, &common->op_flags) &&
408 sc->spectral_mode == SPECTRAL_CHANSCAN)
409 ath9k_spectral_scan_trigger(hw);
415 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
416 struct ieee80211_vif *vif)
419 an = (struct ath_node *)sta->drv_priv;
424 memset(&an->key_idx, 0, sizeof(an->key_idx));
426 ath_tx_node_init(sc, an);
429 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
431 struct ath_node *an = (struct ath_node *)sta->drv_priv;
432 ath_tx_node_cleanup(sc, an);
435 void ath9k_tasklet(unsigned long data)
437 struct ath_softc *sc = (struct ath_softc *)data;
438 struct ath_hw *ah = sc->sc_ah;
439 struct ath_common *common = ath9k_hw_common(ah);
440 enum ath_reset_type type;
442 u32 status = sc->intrstatus;
446 spin_lock(&sc->sc_pcu_lock);
448 if (status & ATH9K_INT_FATAL) {
449 type = RESET_TYPE_FATAL_INT;
450 ath9k_queue_reset(sc, type);
453 * Increment the ref. counter here so that
454 * interrupts are enabled in the reset routine.
456 atomic_inc(&ah->intr_ref_cnt);
457 ath_dbg(common, RESET, "FATAL: Skipping interrupts\n");
461 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
462 (status & ATH9K_INT_BB_WATCHDOG)) {
463 spin_lock(&common->cc_lock);
464 ath_hw_cycle_counters_update(common);
465 ar9003_hw_bb_watchdog_dbg_info(ah);
466 spin_unlock(&common->cc_lock);
468 if (ar9003_hw_bb_watchdog_check(ah)) {
469 type = RESET_TYPE_BB_WATCHDOG;
470 ath9k_queue_reset(sc, type);
473 * Increment the ref. counter here so that
474 * interrupts are enabled in the reset routine.
476 atomic_inc(&ah->intr_ref_cnt);
477 ath_dbg(common, RESET,
478 "BB_WATCHDOG: Skipping interrupts\n");
483 if (status & ATH9K_INT_GTT) {
486 if ((sc->gtt_cnt >= MAX_GTT_CNT) && !ath9k_hw_check_alive(ah)) {
487 type = RESET_TYPE_TX_GTT;
488 ath9k_queue_reset(sc, type);
489 atomic_inc(&ah->intr_ref_cnt);
490 ath_dbg(common, RESET,
491 "GTT: Skipping interrupts\n");
496 spin_lock_irqsave(&sc->sc_pm_lock, flags);
497 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
499 * TSF sync does not look correct; remain awake to sync with
502 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
503 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
505 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
507 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
508 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
511 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
513 if (status & rxmask) {
514 /* Check for high priority Rx first */
515 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
516 (status & ATH9K_INT_RXHP))
517 ath_rx_tasklet(sc, 0, true);
519 ath_rx_tasklet(sc, 0, false);
522 if (status & ATH9K_INT_TX) {
523 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
525 * For EDMA chips, TX completion is enabled for the
526 * beacon queue, so if a beacon has been transmitted
527 * successfully after a GTT interrupt, the GTT counter
528 * gets reset to zero here.
532 ath_tx_edma_tasklet(sc);
537 wake_up(&sc->tx_wait);
540 if (status & ATH9K_INT_GENTIMER)
541 ath_gen_timer_isr(sc->sc_ah);
543 ath9k_btcoex_handle_interrupt(sc, status);
545 /* re-enable hardware interrupt */
546 ath9k_hw_enable_interrupts(ah);
548 spin_unlock(&sc->sc_pcu_lock);
549 ath9k_ps_restore(sc);
552 irqreturn_t ath_isr(int irq, void *dev)
554 #define SCHED_INTR ( \
556 ATH9K_INT_BB_WATCHDOG | \
567 ATH9K_INT_GENTIMER | \
570 struct ath_softc *sc = dev;
571 struct ath_hw *ah = sc->sc_ah;
572 struct ath_common *common = ath9k_hw_common(ah);
573 enum ath9k_int status;
578 * The hardware is not ready/present, don't
579 * touch anything. Note this can happen early
580 * on if the IRQ is shared.
582 if (test_bit(ATH_OP_INVALID, &common->op_flags))
585 /* shared irq, not for us */
587 if (!ath9k_hw_intrpend(ah))
590 if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) {
591 ath9k_hw_kill_interrupts(ah);
596 * Figure out the reason(s) for the interrupt. Note
597 * that the hal returns a pseudo-ISR that may include
598 * bits we haven't explicitly enabled so we mask the
599 * value to insure we only process bits we requested.
601 ath9k_hw_getisr(ah, &status, &sync_cause); /* NB: clears ISR too */
602 ath9k_debug_sync_cause(sc, sync_cause);
603 status &= ah->imask; /* discard unasked-for bits */
606 * If there are no status bits set, then this interrupt was not
607 * for me (should have been caught above).
612 /* Cache the status */
613 sc->intrstatus = status;
615 if (status & SCHED_INTR)
619 * If a FATAL or RXORN interrupt is received, we have to reset the
622 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
623 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
626 if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
627 (status & ATH9K_INT_BB_WATCHDOG))
630 #ifdef CONFIG_ATH9K_WOW
631 if (status & ATH9K_INT_BMISS) {
632 if (atomic_read(&sc->wow_sleep_proc_intr) == 0) {
633 atomic_inc(&sc->wow_got_bmiss_intr);
634 atomic_dec(&sc->wow_sleep_proc_intr);
639 if (status & ATH9K_INT_SWBA)
640 tasklet_schedule(&sc->bcon_tasklet);
642 if (status & ATH9K_INT_TXURN)
643 ath9k_hw_updatetxtriglevel(ah, true);
645 if (status & ATH9K_INT_RXEOL) {
646 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
647 ath9k_hw_set_interrupts(ah);
650 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
651 if (status & ATH9K_INT_TIM_TIMER) {
652 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
654 /* Clear RxAbort bit so that we can
656 ath9k_setpower(sc, ATH9K_PM_AWAKE);
657 spin_lock(&sc->sc_pm_lock);
658 ath9k_hw_setrxabort(sc->sc_ah, 0);
659 sc->ps_flags |= PS_WAIT_FOR_BEACON;
660 spin_unlock(&sc->sc_pm_lock);
665 ath_debug_stat_interrupt(sc, status);
668 /* turn off every interrupt */
669 ath9k_hw_disable_interrupts(ah);
670 tasklet_schedule(&sc->intr_tq);
678 int ath_reset(struct ath_softc *sc)
683 r = ath_reset_internal(sc, NULL);
684 ath9k_ps_restore(sc);
689 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
691 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
692 #ifdef CONFIG_ATH9K_DEBUGFS
693 RESET_STAT_INC(sc, type);
695 set_bit(ATH_OP_HW_RESET, &common->op_flags);
696 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
699 void ath_reset_work(struct work_struct *work)
701 struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
706 /**********************/
707 /* mac80211 callbacks */
708 /**********************/
710 static int ath9k_start(struct ieee80211_hw *hw)
712 struct ath_softc *sc = hw->priv;
713 struct ath_hw *ah = sc->sc_ah;
714 struct ath_common *common = ath9k_hw_common(ah);
715 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
716 struct ath9k_channel *init_channel;
719 ath_dbg(common, CONFIG,
720 "Starting driver with initial channel: %d MHz\n",
721 curchan->center_freq);
724 mutex_lock(&sc->mutex);
726 init_channel = ath9k_cmn_get_channel(hw, ah, &hw->conf.chandef);
728 /* Reset SERDES registers */
729 ath9k_hw_configpcipowersave(ah, false);
732 * The basic interface to setting the hardware in a good
733 * state is ``reset''. On return the hardware is known to
734 * be powered up and with interrupts disabled. This must
735 * be followed by initialization of the appropriate bits
736 * and then setup of the interrupt mask.
738 spin_lock_bh(&sc->sc_pcu_lock);
740 atomic_set(&ah->intr_ref_cnt, -1);
742 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
745 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
746 r, curchan->center_freq);
747 ah->reset_power_on = false;
750 /* Setup our intr mask. */
751 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
752 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
755 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
756 ah->imask |= ATH9K_INT_RXHP |
759 ah->imask |= ATH9K_INT_RX;
761 if (ah->config.hw_hang_checks & HW_BB_WATCHDOG)
762 ah->imask |= ATH9K_INT_BB_WATCHDOG;
765 * Enable GTT interrupts only for AR9003/AR9004 chips
768 if (AR_SREV_9300_20_OR_LATER(ah))
769 ah->imask |= ATH9K_INT_GTT;
771 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
772 ah->imask |= ATH9K_INT_CST;
776 clear_bit(ATH_OP_INVALID, &common->op_flags);
777 sc->sc_ah->is_monitoring = false;
779 if (!ath_complete_reset(sc, false))
780 ah->reset_power_on = false;
782 if (ah->led_pin >= 0) {
783 ath9k_hw_cfg_output(ah, ah->led_pin,
784 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
785 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
789 * Reset key cache to sane defaults (all entries cleared) instead of
790 * semi-random values after suspend/resume.
792 ath9k_cmn_init_crypto(sc->sc_ah);
794 ath9k_hw_reset_tsf(ah);
796 spin_unlock_bh(&sc->sc_pcu_lock);
798 mutex_unlock(&sc->mutex);
800 ath9k_ps_restore(sc);
805 static void ath9k_tx(struct ieee80211_hw *hw,
806 struct ieee80211_tx_control *control,
809 struct ath_softc *sc = hw->priv;
810 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
811 struct ath_tx_control txctl;
812 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
815 if (sc->ps_enabled) {
817 * mac80211 does not set PM field for normal data frames, so we
818 * need to update that based on the current PS mode.
820 if (ieee80211_is_data(hdr->frame_control) &&
821 !ieee80211_is_nullfunc(hdr->frame_control) &&
822 !ieee80211_has_pm(hdr->frame_control)) {
824 "Add PM=1 for a TX frame while in PS mode\n");
825 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
829 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
831 * We are using PS-Poll and mac80211 can request TX while in
832 * power save mode. Need to wake up hardware for the TX to be
833 * completed and if needed, also for RX of buffered frames.
836 spin_lock_irqsave(&sc->sc_pm_lock, flags);
837 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
838 ath9k_hw_setrxabort(sc->sc_ah, 0);
839 if (ieee80211_is_pspoll(hdr->frame_control)) {
841 "Sending PS-Poll to pick a buffered frame\n");
842 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
844 ath_dbg(common, PS, "Wake up to complete TX\n");
845 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
848 * The actual restore operation will happen only after
849 * the ps_flags bit is cleared. We are just dropping
850 * the ps_usecount here.
852 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
853 ath9k_ps_restore(sc);
857 * Cannot tx while the hardware is in full sleep, it first needs a full
858 * chip reset to recover from that
860 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
861 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
865 memset(&txctl, 0, sizeof(struct ath_tx_control));
866 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
867 txctl.sta = control->sta;
869 ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
871 if (ath_tx_start(hw, skb, &txctl) != 0) {
872 ath_dbg(common, XMIT, "TX failed\n");
873 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
879 ieee80211_free_txskb(hw, skb);
882 static void ath9k_stop(struct ieee80211_hw *hw)
884 struct ath_softc *sc = hw->priv;
885 struct ath_hw *ah = sc->sc_ah;
886 struct ath_common *common = ath9k_hw_common(ah);
889 mutex_lock(&sc->mutex);
893 if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
894 ath_dbg(common, ANY, "Device not present\n");
895 mutex_unlock(&sc->mutex);
899 /* Ensure HW is awake when we try to shut it down. */
902 spin_lock_bh(&sc->sc_pcu_lock);
904 /* prevent tasklets to enable interrupts once we disable them */
905 ah->imask &= ~ATH9K_INT_GLOBAL;
907 /* make sure h/w will not generate any interrupt
908 * before setting the invalid flag. */
909 ath9k_hw_disable_interrupts(ah);
911 spin_unlock_bh(&sc->sc_pcu_lock);
913 /* we can now sync irq and kill any running tasklets, since we already
914 * disabled interrupts and not holding a spin lock */
915 synchronize_irq(sc->irq);
916 tasklet_kill(&sc->intr_tq);
917 tasklet_kill(&sc->bcon_tasklet);
919 prev_idle = sc->ps_idle;
922 spin_lock_bh(&sc->sc_pcu_lock);
924 if (ah->led_pin >= 0) {
925 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
926 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
929 ath_prepare_reset(sc);
932 dev_kfree_skb_any(sc->rx.frag);
937 ah->curchan = ath9k_cmn_get_channel(hw, ah, &hw->conf.chandef);
939 ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
940 ath9k_hw_phy_disable(ah);
942 ath9k_hw_configpcipowersave(ah, true);
944 spin_unlock_bh(&sc->sc_pcu_lock);
946 ath9k_ps_restore(sc);
948 set_bit(ATH_OP_INVALID, &common->op_flags);
949 sc->ps_idle = prev_idle;
951 mutex_unlock(&sc->mutex);
953 ath_dbg(common, CONFIG, "Driver halt\n");
956 static bool ath9k_uses_beacons(int type)
959 case NL80211_IFTYPE_AP:
960 case NL80211_IFTYPE_ADHOC:
961 case NL80211_IFTYPE_MESH_POINT:
968 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
970 struct ath9k_vif_iter_data *iter_data = data;
973 if (iter_data->has_hw_macaddr) {
974 for (i = 0; i < ETH_ALEN; i++)
975 iter_data->mask[i] &=
976 ~(iter_data->hw_macaddr[i] ^ mac[i]);
978 memcpy(iter_data->hw_macaddr, mac, ETH_ALEN);
979 iter_data->has_hw_macaddr = true;
983 case NL80211_IFTYPE_AP:
986 case NL80211_IFTYPE_STATION:
987 iter_data->nstations++;
989 case NL80211_IFTYPE_ADHOC:
990 iter_data->nadhocs++;
992 case NL80211_IFTYPE_MESH_POINT:
993 iter_data->nmeshes++;
995 case NL80211_IFTYPE_WDS:
1003 static void ath9k_sta_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1005 struct ath_softc *sc = data;
1006 struct ath_vif *avp = (void *)vif->drv_priv;
1008 if (vif->type != NL80211_IFTYPE_STATION)
1011 if (avp->primary_sta_vif)
1012 ath9k_set_assoc_state(sc, vif);
1015 /* Called with sc->mutex held. */
1016 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
1017 struct ieee80211_vif *vif,
1018 struct ath9k_vif_iter_data *iter_data)
1020 struct ath_softc *sc = hw->priv;
1021 struct ath_hw *ah = sc->sc_ah;
1022 struct ath_common *common = ath9k_hw_common(ah);
1025 * Pick the MAC address of the first interface as the new hardware
1026 * MAC address. The hardware will use it together with the BSSID mask
1027 * when matching addresses.
1029 memset(iter_data, 0, sizeof(*iter_data));
1030 memset(&iter_data->mask, 0xff, ETH_ALEN);
1033 ath9k_vif_iter(iter_data, vif->addr, vif);
1035 /* Get list of all active MAC addresses */
1036 ieee80211_iterate_active_interfaces_atomic(
1037 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1038 ath9k_vif_iter, iter_data);
1040 memcpy(common->macaddr, iter_data->hw_macaddr, ETH_ALEN);
1043 /* Called with sc->mutex held. */
1044 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
1045 struct ieee80211_vif *vif)
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 ath9k_vif_iter_data iter_data;
1051 enum nl80211_iftype old_opmode = ah->opmode;
1053 ath9k_calculate_iter_data(hw, vif, &iter_data);
1055 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
1056 ath_hw_setbssidmask(common);
1058 if (iter_data.naps > 0) {
1059 ath9k_hw_set_tsfadjust(ah, true);
1060 ah->opmode = NL80211_IFTYPE_AP;
1062 ath9k_hw_set_tsfadjust(ah, false);
1064 if (iter_data.nmeshes)
1065 ah->opmode = NL80211_IFTYPE_MESH_POINT;
1066 else if (iter_data.nwds)
1067 ah->opmode = NL80211_IFTYPE_AP;
1068 else if (iter_data.nadhocs)
1069 ah->opmode = NL80211_IFTYPE_ADHOC;
1071 ah->opmode = NL80211_IFTYPE_STATION;
1074 ath9k_hw_setopmode(ah);
1076 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
1077 ah->imask |= ATH9K_INT_TSFOOR;
1079 ah->imask &= ~ATH9K_INT_TSFOOR;
1081 ath9k_hw_set_interrupts(ah);
1084 * If we are changing the opmode to STATION,
1085 * a beacon sync needs to be done.
1087 if (ah->opmode == NL80211_IFTYPE_STATION &&
1088 old_opmode == NL80211_IFTYPE_AP &&
1089 test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
1090 ieee80211_iterate_active_interfaces_atomic(
1091 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1092 ath9k_sta_vif_iter, sc);
1096 static int ath9k_add_interface(struct ieee80211_hw *hw,
1097 struct ieee80211_vif *vif)
1099 struct ath_softc *sc = hw->priv;
1100 struct ath_hw *ah = sc->sc_ah;
1101 struct ath_common *common = ath9k_hw_common(ah);
1102 struct ath_vif *avp = (void *)vif->drv_priv;
1103 struct ath_node *an = &avp->mcast_node;
1105 mutex_lock(&sc->mutex);
1107 if (config_enabled(CONFIG_ATH9K_TX99)) {
1108 if (sc->nvifs >= 1) {
1109 mutex_unlock(&sc->mutex);
1115 ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
1118 ath9k_ps_wakeup(sc);
1119 ath9k_calculate_summary_state(hw, vif);
1120 ath9k_ps_restore(sc);
1122 if (ath9k_uses_beacons(vif->type))
1123 ath9k_beacon_assign_slot(sc, vif);
1130 an->no_ps_filter = true;
1131 ath_tx_node_init(sc, an);
1133 mutex_unlock(&sc->mutex);
1137 static int ath9k_change_interface(struct ieee80211_hw *hw,
1138 struct ieee80211_vif *vif,
1139 enum nl80211_iftype new_type,
1142 struct ath_softc *sc = hw->priv;
1143 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1145 mutex_lock(&sc->mutex);
1147 if (config_enabled(CONFIG_ATH9K_TX99)) {
1148 mutex_unlock(&sc->mutex);
1152 ath_dbg(common, CONFIG, "Change Interface\n");
1154 if (ath9k_uses_beacons(vif->type))
1155 ath9k_beacon_remove_slot(sc, vif);
1157 vif->type = new_type;
1160 ath9k_ps_wakeup(sc);
1161 ath9k_calculate_summary_state(hw, vif);
1162 ath9k_ps_restore(sc);
1164 if (ath9k_uses_beacons(vif->type))
1165 ath9k_beacon_assign_slot(sc, vif);
1167 mutex_unlock(&sc->mutex);
1172 ath9k_update_p2p_ps_timer(struct ath_softc *sc, struct ath_vif *avp)
1174 struct ath_hw *ah = sc->sc_ah;
1175 s32 tsf, target_tsf;
1177 if (!avp || !avp->noa.has_next_tsf)
1180 ath9k_hw_gen_timer_stop(ah, sc->p2p_ps_timer);
1182 tsf = ath9k_hw_gettsf32(sc->sc_ah);
1184 target_tsf = avp->noa.next_tsf;
1185 if (!avp->noa.absent)
1186 target_tsf -= ATH_P2P_PS_STOP_TIME;
1188 if (target_tsf - tsf < ATH_P2P_PS_STOP_TIME)
1189 target_tsf = tsf + ATH_P2P_PS_STOP_TIME;
1191 ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, (u32) target_tsf, 1000000);
1194 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1195 struct ieee80211_vif *vif)
1197 struct ath_softc *sc = hw->priv;
1198 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1199 struct ath_vif *avp = (void *)vif->drv_priv;
1201 ath_dbg(common, CONFIG, "Detach Interface\n");
1203 mutex_lock(&sc->mutex);
1205 spin_lock_bh(&sc->sc_pcu_lock);
1206 if (avp == sc->p2p_ps_vif) {
1207 sc->p2p_ps_vif = NULL;
1208 ath9k_update_p2p_ps_timer(sc, NULL);
1210 spin_unlock_bh(&sc->sc_pcu_lock);
1213 sc->tx99_vif = NULL;
1215 if (ath9k_uses_beacons(vif->type))
1216 ath9k_beacon_remove_slot(sc, vif);
1218 ath9k_ps_wakeup(sc);
1219 ath9k_calculate_summary_state(hw, NULL);
1220 ath9k_ps_restore(sc);
1222 ath_tx_node_cleanup(sc, &avp->mcast_node);
1224 mutex_unlock(&sc->mutex);
1227 static void ath9k_enable_ps(struct ath_softc *sc)
1229 struct ath_hw *ah = sc->sc_ah;
1230 struct ath_common *common = ath9k_hw_common(ah);
1232 if (config_enabled(CONFIG_ATH9K_TX99))
1235 sc->ps_enabled = true;
1236 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1237 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1238 ah->imask |= ATH9K_INT_TIM_TIMER;
1239 ath9k_hw_set_interrupts(ah);
1241 ath9k_hw_setrxabort(ah, 1);
1243 ath_dbg(common, PS, "PowerSave enabled\n");
1246 static void ath9k_disable_ps(struct ath_softc *sc)
1248 struct ath_hw *ah = sc->sc_ah;
1249 struct ath_common *common = ath9k_hw_common(ah);
1251 if (config_enabled(CONFIG_ATH9K_TX99))
1254 sc->ps_enabled = false;
1255 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1256 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1257 ath9k_hw_setrxabort(ah, 0);
1258 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1260 PS_WAIT_FOR_PSPOLL_DATA |
1261 PS_WAIT_FOR_TX_ACK);
1262 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1263 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1264 ath9k_hw_set_interrupts(ah);
1267 ath_dbg(common, PS, "PowerSave disabled\n");
1270 void ath9k_spectral_scan_trigger(struct ieee80211_hw *hw)
1272 struct ath_softc *sc = hw->priv;
1273 struct ath_hw *ah = sc->sc_ah;
1274 struct ath_common *common = ath9k_hw_common(ah);
1277 if (config_enabled(CONFIG_ATH9K_TX99))
1280 if (!ath9k_hw_ops(ah)->spectral_scan_trigger) {
1281 ath_err(common, "spectrum analyzer not implemented on this hardware\n");
1285 ath9k_ps_wakeup(sc);
1286 rxfilter = ath9k_hw_getrxfilter(ah);
1287 ath9k_hw_setrxfilter(ah, rxfilter |
1288 ATH9K_RX_FILTER_PHYRADAR |
1289 ATH9K_RX_FILTER_PHYERR);
1291 /* TODO: usually this should not be neccesary, but for some reason
1292 * (or in some mode?) the trigger must be called after the
1293 * configuration, otherwise the register will have its values reset
1294 * (on my ar9220 to value 0x01002310)
1296 ath9k_spectral_scan_config(hw, sc->spectral_mode);
1297 ath9k_hw_ops(ah)->spectral_scan_trigger(ah);
1298 ath9k_ps_restore(sc);
1301 int ath9k_spectral_scan_config(struct ieee80211_hw *hw,
1302 enum spectral_mode spectral_mode)
1304 struct ath_softc *sc = hw->priv;
1305 struct ath_hw *ah = sc->sc_ah;
1306 struct ath_common *common = ath9k_hw_common(ah);
1308 if (!ath9k_hw_ops(ah)->spectral_scan_trigger) {
1309 ath_err(common, "spectrum analyzer not implemented on this hardware\n");
1313 switch (spectral_mode) {
1314 case SPECTRAL_DISABLED:
1315 sc->spec_config.enabled = 0;
1317 case SPECTRAL_BACKGROUND:
1318 /* send endless samples.
1319 * TODO: is this really useful for "background"?
1321 sc->spec_config.endless = 1;
1322 sc->spec_config.enabled = 1;
1324 case SPECTRAL_CHANSCAN:
1325 case SPECTRAL_MANUAL:
1326 sc->spec_config.endless = 0;
1327 sc->spec_config.enabled = 1;
1333 ath9k_ps_wakeup(sc);
1334 ath9k_hw_ops(ah)->spectral_scan_config(ah, &sc->spec_config);
1335 ath9k_ps_restore(sc);
1337 sc->spectral_mode = spectral_mode;
1342 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1344 struct ath_softc *sc = hw->priv;
1345 struct ath_hw *ah = sc->sc_ah;
1346 struct ath_common *common = ath9k_hw_common(ah);
1347 struct ieee80211_conf *conf = &hw->conf;
1348 bool reset_channel = false;
1350 ath9k_ps_wakeup(sc);
1351 mutex_lock(&sc->mutex);
1353 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1354 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1356 ath_cancel_work(sc);
1357 ath9k_stop_btcoex(sc);
1359 ath9k_start_btcoex(sc);
1361 * The chip needs a reset to properly wake up from
1364 reset_channel = ah->chip_fullsleep;
1369 * We just prepare to enable PS. We have to wait until our AP has
1370 * ACK'd our null data frame to disable RX otherwise we'll ignore
1371 * those ACKs and end up retransmitting the same null data frames.
1372 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1374 if (changed & IEEE80211_CONF_CHANGE_PS) {
1375 unsigned long flags;
1376 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1377 if (conf->flags & IEEE80211_CONF_PS)
1378 ath9k_enable_ps(sc);
1380 ath9k_disable_ps(sc);
1381 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1384 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1385 if (conf->flags & IEEE80211_CONF_MONITOR) {
1386 ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1387 sc->sc_ah->is_monitoring = true;
1389 ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1390 sc->sc_ah->is_monitoring = false;
1394 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
1395 if (ath_set_channel(sc, &hw->conf.chandef) < 0) {
1396 ath_err(common, "Unable to set channel\n");
1397 mutex_unlock(&sc->mutex);
1398 ath9k_ps_restore(sc);
1403 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1404 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1405 sc->config.txpowlimit = 2 * conf->power_level;
1406 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1407 sc->config.txpowlimit, &sc->curtxpow);
1410 mutex_unlock(&sc->mutex);
1411 ath9k_ps_restore(sc);
1416 #define SUPPORTED_FILTERS \
1417 (FIF_PROMISC_IN_BSS | \
1422 FIF_BCN_PRBRESP_PROMISC | \
1426 /* FIXME: sc->sc_full_reset ? */
1427 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1428 unsigned int changed_flags,
1429 unsigned int *total_flags,
1432 struct ath_softc *sc = hw->priv;
1435 changed_flags &= SUPPORTED_FILTERS;
1436 *total_flags &= SUPPORTED_FILTERS;
1438 sc->rx.rxfilter = *total_flags;
1439 ath9k_ps_wakeup(sc);
1440 rfilt = ath_calcrxfilter(sc);
1441 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1442 ath9k_ps_restore(sc);
1444 ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1448 static int ath9k_sta_add(struct ieee80211_hw *hw,
1449 struct ieee80211_vif *vif,
1450 struct ieee80211_sta *sta)
1452 struct ath_softc *sc = hw->priv;
1453 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1454 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1455 struct ieee80211_key_conf ps_key = { };
1458 ath_node_attach(sc, sta, vif);
1460 if (vif->type != NL80211_IFTYPE_AP &&
1461 vif->type != NL80211_IFTYPE_AP_VLAN)
1464 key = ath_key_config(common, vif, sta, &ps_key);
1467 an->key_idx[0] = key;
1473 static void ath9k_del_ps_key(struct ath_softc *sc,
1474 struct ieee80211_vif *vif,
1475 struct ieee80211_sta *sta)
1477 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1478 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1479 struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1484 ath_key_delete(common, &ps_key);
1489 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1490 struct ieee80211_vif *vif,
1491 struct ieee80211_sta *sta)
1493 struct ath_softc *sc = hw->priv;
1495 ath9k_del_ps_key(sc, vif, sta);
1496 ath_node_detach(sc, sta);
1501 static void ath9k_sta_set_tx_filter(struct ath_hw *ah,
1502 struct ath_node *an,
1507 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1508 if (!an->key_idx[i])
1510 ath9k_hw_set_tx_filter(ah, an->key_idx[i], set);
1514 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1515 struct ieee80211_vif *vif,
1516 enum sta_notify_cmd cmd,
1517 struct ieee80211_sta *sta)
1519 struct ath_softc *sc = hw->priv;
1520 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1523 case STA_NOTIFY_SLEEP:
1524 an->sleeping = true;
1525 ath_tx_aggr_sleep(sta, sc, an);
1526 ath9k_sta_set_tx_filter(sc->sc_ah, an, true);
1528 case STA_NOTIFY_AWAKE:
1529 ath9k_sta_set_tx_filter(sc->sc_ah, an, false);
1530 an->sleeping = false;
1531 ath_tx_aggr_wakeup(sc, an);
1536 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1537 struct ieee80211_vif *vif, u16 queue,
1538 const struct ieee80211_tx_queue_params *params)
1540 struct ath_softc *sc = hw->priv;
1541 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1542 struct ath_txq *txq;
1543 struct ath9k_tx_queue_info qi;
1546 if (queue >= IEEE80211_NUM_ACS)
1549 txq = sc->tx.txq_map[queue];
1551 ath9k_ps_wakeup(sc);
1552 mutex_lock(&sc->mutex);
1554 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1556 qi.tqi_aifs = params->aifs;
1557 qi.tqi_cwmin = params->cw_min;
1558 qi.tqi_cwmax = params->cw_max;
1559 qi.tqi_burstTime = params->txop * 32;
1561 ath_dbg(common, CONFIG,
1562 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1563 queue, txq->axq_qnum, params->aifs, params->cw_min,
1564 params->cw_max, params->txop);
1566 ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1567 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1569 ath_err(common, "TXQ Update failed\n");
1571 mutex_unlock(&sc->mutex);
1572 ath9k_ps_restore(sc);
1577 static int ath9k_set_key(struct ieee80211_hw *hw,
1578 enum set_key_cmd cmd,
1579 struct ieee80211_vif *vif,
1580 struct ieee80211_sta *sta,
1581 struct ieee80211_key_conf *key)
1583 struct ath_softc *sc = hw->priv;
1584 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1585 struct ath_node *an = NULL;
1588 if (ath9k_modparam_nohwcrypt)
1591 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1592 vif->type == NL80211_IFTYPE_MESH_POINT) &&
1593 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1594 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1595 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1597 * For now, disable hw crypto for the RSN IBSS group keys. This
1598 * could be optimized in the future to use a modified key cache
1599 * design to support per-STA RX GTK, but until that gets
1600 * implemented, use of software crypto for group addressed
1601 * frames is a acceptable to allow RSN IBSS to be used.
1606 mutex_lock(&sc->mutex);
1607 ath9k_ps_wakeup(sc);
1608 ath_dbg(common, CONFIG, "Set HW Key %d\n", cmd);
1610 an = (struct ath_node *)sta->drv_priv;
1615 ath9k_del_ps_key(sc, vif, sta);
1617 key->hw_key_idx = 0;
1618 ret = ath_key_config(common, vif, sta, key);
1620 key->hw_key_idx = ret;
1621 /* push IV and Michael MIC generation to stack */
1622 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1623 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1624 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1625 if (sc->sc_ah->sw_mgmt_crypto &&
1626 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1627 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1630 if (an && key->hw_key_idx) {
1631 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1634 an->key_idx[i] = key->hw_key_idx;
1637 WARN_ON(i == ARRAY_SIZE(an->key_idx));
1641 ath_key_delete(common, key);
1643 for (i = 0; i < ARRAY_SIZE(an->key_idx); i++) {
1644 if (an->key_idx[i] != key->hw_key_idx)
1650 key->hw_key_idx = 0;
1656 ath9k_ps_restore(sc);
1657 mutex_unlock(&sc->mutex);
1662 static void ath9k_set_assoc_state(struct ath_softc *sc,
1663 struct ieee80211_vif *vif)
1665 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1666 struct ath_vif *avp = (void *)vif->drv_priv;
1667 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1668 unsigned long flags;
1670 set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1671 avp->primary_sta_vif = true;
1674 * Set the AID, BSSID and do beacon-sync only when
1675 * the HW opmode is STATION.
1677 * But the primary bit is set above in any case.
1679 if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1682 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1683 common->curaid = bss_conf->aid;
1684 ath9k_hw_write_associd(sc->sc_ah);
1686 common->last_rssi = ATH_RSSI_DUMMY_MARKER;
1687 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1689 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1690 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1691 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1693 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1694 ath9k_mci_update_wlan_channels(sc, false);
1696 ath_dbg(common, CONFIG,
1697 "Primary Station interface: %pM, BSSID: %pM\n",
1698 vif->addr, common->curbssid);
1701 static void ath9k_bss_assoc_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1703 struct ath_softc *sc = data;
1704 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1705 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1707 if (test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags))
1710 if (bss_conf->assoc)
1711 ath9k_set_assoc_state(sc, vif);
1714 void ath9k_p2p_ps_timer(void *priv)
1716 struct ath_softc *sc = priv;
1717 struct ath_vif *avp = sc->p2p_ps_vif;
1718 struct ieee80211_vif *vif;
1719 struct ieee80211_sta *sta;
1720 struct ath_node *an;
1726 tsf = ath9k_hw_gettsf32(sc->sc_ah);
1727 if (!avp->noa.absent)
1728 tsf += ATH_P2P_PS_STOP_TIME;
1730 if (!avp->noa.has_next_tsf ||
1731 avp->noa.next_tsf - tsf > BIT(31))
1732 ieee80211_update_p2p_noa(&avp->noa, tsf);
1734 ath9k_update_p2p_ps_timer(sc, avp);
1739 sta = ieee80211_find_sta(vif, vif->bss_conf.bssid);
1743 an = (void *) sta->drv_priv;
1744 if (an->sleeping == !!avp->noa.absent)
1747 an->sleeping = avp->noa.absent;
1749 ath_tx_aggr_sleep(sta, sc, an);
1751 ath_tx_aggr_wakeup(sc, an);
1757 void ath9k_update_p2p_ps(struct ath_softc *sc, struct ieee80211_vif *vif)
1759 struct ath_vif *avp = (void *)vif->drv_priv;
1762 if (!sc->p2p_ps_timer)
1765 if (vif->type != NL80211_IFTYPE_STATION || !vif->p2p)
1768 sc->p2p_ps_vif = avp;
1769 tsf = ath9k_hw_gettsf32(sc->sc_ah);
1770 ieee80211_parse_p2p_noa(&vif->bss_conf.p2p_noa_attr, &avp->noa, tsf);
1771 ath9k_update_p2p_ps_timer(sc, avp);
1774 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1775 struct ieee80211_vif *vif,
1776 struct ieee80211_bss_conf *bss_conf,
1780 (BSS_CHANGED_ASSOC | \
1781 BSS_CHANGED_IBSS | \
1782 BSS_CHANGED_BEACON_ENABLED)
1784 struct ath_softc *sc = hw->priv;
1785 struct ath_hw *ah = sc->sc_ah;
1786 struct ath_common *common = ath9k_hw_common(ah);
1787 struct ath_vif *avp = (void *)vif->drv_priv;
1788 unsigned long flags;
1791 ath9k_ps_wakeup(sc);
1792 mutex_lock(&sc->mutex);
1794 if (changed & BSS_CHANGED_ASSOC) {
1795 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
1796 bss_conf->bssid, bss_conf->assoc);
1798 if (avp->primary_sta_vif && !bss_conf->assoc) {
1799 clear_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags);
1800 avp->primary_sta_vif = false;
1802 if (ah->opmode == NL80211_IFTYPE_STATION)
1803 clear_bit(ATH_OP_BEACONS, &common->op_flags);
1806 ieee80211_iterate_active_interfaces_atomic(
1807 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1808 ath9k_bss_assoc_iter, sc);
1810 if (!test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags) &&
1811 ah->opmode == NL80211_IFTYPE_STATION) {
1812 memset(common->curbssid, 0, ETH_ALEN);
1814 ath9k_hw_write_associd(sc->sc_ah);
1815 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1816 ath9k_mci_update_wlan_channels(sc, true);
1820 if (changed & BSS_CHANGED_IBSS) {
1821 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1822 common->curaid = bss_conf->aid;
1823 ath9k_hw_write_associd(sc->sc_ah);
1826 if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
1827 (changed & BSS_CHANGED_BEACON_INT))
1828 ath9k_beacon_config(sc, vif, changed);
1830 if (changed & BSS_CHANGED_ERP_SLOT) {
1831 if (bss_conf->use_short_slot)
1835 if (vif->type == NL80211_IFTYPE_AP) {
1837 * Defer update, so that connected stations can adjust
1838 * their settings at the same time.
1839 * See beacon.c for more details
1841 sc->beacon.slottime = slottime;
1842 sc->beacon.updateslot = UPDATE;
1844 ah->slottime = slottime;
1845 ath9k_hw_init_global_settings(ah);
1849 if (changed & BSS_CHANGED_P2P_PS) {
1850 spin_lock_bh(&sc->sc_pcu_lock);
1851 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1852 if (!(sc->ps_flags & PS_BEACON_SYNC))
1853 ath9k_update_p2p_ps(sc, vif);
1854 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1855 spin_unlock_bh(&sc->sc_pcu_lock);
1858 if (changed & CHECK_ANI)
1861 mutex_unlock(&sc->mutex);
1862 ath9k_ps_restore(sc);
1867 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1869 struct ath_softc *sc = hw->priv;
1872 mutex_lock(&sc->mutex);
1873 ath9k_ps_wakeup(sc);
1874 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1875 ath9k_ps_restore(sc);
1876 mutex_unlock(&sc->mutex);
1881 static void ath9k_set_tsf(struct ieee80211_hw *hw,
1882 struct ieee80211_vif *vif,
1885 struct ath_softc *sc = hw->priv;
1887 mutex_lock(&sc->mutex);
1888 ath9k_ps_wakeup(sc);
1889 ath9k_hw_settsf64(sc->sc_ah, tsf);
1890 ath9k_ps_restore(sc);
1891 mutex_unlock(&sc->mutex);
1894 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1896 struct ath_softc *sc = hw->priv;
1898 mutex_lock(&sc->mutex);
1900 ath9k_ps_wakeup(sc);
1901 ath9k_hw_reset_tsf(sc->sc_ah);
1902 ath9k_ps_restore(sc);
1904 mutex_unlock(&sc->mutex);
1907 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1908 struct ieee80211_vif *vif,
1909 enum ieee80211_ampdu_mlme_action action,
1910 struct ieee80211_sta *sta,
1911 u16 tid, u16 *ssn, u8 buf_size)
1913 struct ath_softc *sc = hw->priv;
1917 mutex_lock(&sc->mutex);
1920 case IEEE80211_AMPDU_RX_START:
1922 case IEEE80211_AMPDU_RX_STOP:
1924 case IEEE80211_AMPDU_TX_START:
1925 ath9k_ps_wakeup(sc);
1926 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1928 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1929 ath9k_ps_restore(sc);
1931 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1932 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1934 case IEEE80211_AMPDU_TX_STOP_CONT:
1935 ath9k_ps_wakeup(sc);
1936 ath_tx_aggr_stop(sc, sta, tid);
1938 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1939 ath9k_ps_restore(sc);
1941 case IEEE80211_AMPDU_TX_OPERATIONAL:
1942 ath9k_ps_wakeup(sc);
1943 ath_tx_aggr_resume(sc, sta, tid);
1944 ath9k_ps_restore(sc);
1947 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
1950 mutex_unlock(&sc->mutex);
1955 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
1956 struct survey_info *survey)
1958 struct ath_softc *sc = hw->priv;
1959 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1960 struct ieee80211_supported_band *sband;
1961 struct ieee80211_channel *chan;
1964 if (config_enabled(CONFIG_ATH9K_TX99))
1967 spin_lock_bh(&common->cc_lock);
1969 ath_update_survey_stats(sc);
1971 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
1972 if (sband && idx >= sband->n_channels) {
1973 idx -= sband->n_channels;
1978 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
1980 if (!sband || idx >= sband->n_channels) {
1981 spin_unlock_bh(&common->cc_lock);
1985 chan = &sband->channels[idx];
1986 pos = chan->hw_value;
1987 memcpy(survey, &sc->survey[pos], sizeof(*survey));
1988 survey->channel = chan;
1989 spin_unlock_bh(&common->cc_lock);
1994 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
1996 struct ath_softc *sc = hw->priv;
1997 struct ath_hw *ah = sc->sc_ah;
1999 if (config_enabled(CONFIG_ATH9K_TX99))
2002 mutex_lock(&sc->mutex);
2003 ah->coverage_class = coverage_class;
2005 ath9k_ps_wakeup(sc);
2006 ath9k_hw_init_global_settings(ah);
2007 ath9k_ps_restore(sc);
2009 mutex_unlock(&sc->mutex);
2012 static bool ath9k_has_tx_pending(struct ath_softc *sc)
2016 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2017 if (!ATH_TXQ_SETUP(sc, i))
2020 if (!sc->tx.txq[i].axq_depth)
2023 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
2031 static void ath9k_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2032 u32 queues, bool drop)
2034 struct ath_softc *sc = hw->priv;
2035 struct ath_hw *ah = sc->sc_ah;
2036 struct ath_common *common = ath9k_hw_common(ah);
2037 int timeout = HZ / 5; /* 200 ms */
2040 mutex_lock(&sc->mutex);
2041 cancel_delayed_work_sync(&sc->tx_complete_work);
2043 if (ah->ah_flags & AH_UNPLUGGED) {
2044 ath_dbg(common, ANY, "Device has been unplugged!\n");
2045 mutex_unlock(&sc->mutex);
2049 if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
2050 ath_dbg(common, ANY, "Device not present\n");
2051 mutex_unlock(&sc->mutex);
2055 if (wait_event_timeout(sc->tx_wait, !ath9k_has_tx_pending(sc),
2060 ath9k_ps_wakeup(sc);
2061 spin_lock_bh(&sc->sc_pcu_lock);
2062 drain_txq = ath_drain_all_txq(sc);
2063 spin_unlock_bh(&sc->sc_pcu_lock);
2068 ath9k_ps_restore(sc);
2069 ieee80211_wake_queues(hw);
2072 ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
2073 mutex_unlock(&sc->mutex);
2076 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
2078 struct ath_softc *sc = hw->priv;
2081 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
2082 if (!ATH_TXQ_SETUP(sc, i))
2085 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
2091 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
2093 struct ath_softc *sc = hw->priv;
2094 struct ath_hw *ah = sc->sc_ah;
2095 struct ieee80211_vif *vif;
2096 struct ath_vif *avp;
2098 struct ath_tx_status ts;
2099 bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
2102 vif = sc->beacon.bslot[0];
2106 if (!vif->bss_conf.enable_beacon)
2109 avp = (void *)vif->drv_priv;
2111 if (!sc->beacon.tx_processed && !edma) {
2112 tasklet_disable(&sc->bcon_tasklet);
2115 if (!bf || !bf->bf_mpdu)
2118 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
2119 if (status == -EINPROGRESS)
2122 sc->beacon.tx_processed = true;
2123 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
2126 tasklet_enable(&sc->bcon_tasklet);
2129 return sc->beacon.tx_last;
2132 static int ath9k_get_stats(struct ieee80211_hw *hw,
2133 struct ieee80211_low_level_stats *stats)
2135 struct ath_softc *sc = hw->priv;
2136 struct ath_hw *ah = sc->sc_ah;
2137 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
2139 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
2140 stats->dot11RTSFailureCount = mib_stats->rts_bad;
2141 stats->dot11FCSErrorCount = mib_stats->fcs_bad;
2142 stats->dot11RTSSuccessCount = mib_stats->rts_good;
2146 static u32 fill_chainmask(u32 cap, u32 new)
2151 for (i = 0; cap && new; i++, cap >>= 1) {
2152 if (!(cap & BIT(0)))
2164 static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
2166 if (AR_SREV_9300_20_OR_LATER(ah))
2169 switch (val & 0x7) {
2175 return (ah->caps.rx_chainmask == 1);
2181 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
2183 struct ath_softc *sc = hw->priv;
2184 struct ath_hw *ah = sc->sc_ah;
2186 if (ah->caps.rx_chainmask != 1)
2189 if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
2192 sc->ant_rx = rx_ant;
2193 sc->ant_tx = tx_ant;
2195 if (ah->caps.rx_chainmask == 1)
2198 /* AR9100 runs into calibration issues if not all rx chains are enabled */
2199 if (AR_SREV_9100(ah))
2200 ah->rxchainmask = 0x7;
2202 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
2204 ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
2205 ath9k_cmn_reload_chainmask(ah);
2210 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
2212 struct ath_softc *sc = hw->priv;
2214 *tx_ant = sc->ant_tx;
2215 *rx_ant = sc->ant_rx;
2219 static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
2221 struct ath_softc *sc = hw->priv;
2222 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2223 set_bit(ATH_OP_SCANNING, &common->op_flags);
2226 static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
2228 struct ath_softc *sc = hw->priv;
2229 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
2230 clear_bit(ATH_OP_SCANNING, &common->op_flags);
2233 struct ieee80211_ops ath9k_ops = {
2235 .start = ath9k_start,
2237 .add_interface = ath9k_add_interface,
2238 .change_interface = ath9k_change_interface,
2239 .remove_interface = ath9k_remove_interface,
2240 .config = ath9k_config,
2241 .configure_filter = ath9k_configure_filter,
2242 .sta_add = ath9k_sta_add,
2243 .sta_remove = ath9k_sta_remove,
2244 .sta_notify = ath9k_sta_notify,
2245 .conf_tx = ath9k_conf_tx,
2246 .bss_info_changed = ath9k_bss_info_changed,
2247 .set_key = ath9k_set_key,
2248 .get_tsf = ath9k_get_tsf,
2249 .set_tsf = ath9k_set_tsf,
2250 .reset_tsf = ath9k_reset_tsf,
2251 .ampdu_action = ath9k_ampdu_action,
2252 .get_survey = ath9k_get_survey,
2253 .rfkill_poll = ath9k_rfkill_poll_state,
2254 .set_coverage_class = ath9k_set_coverage_class,
2255 .flush = ath9k_flush,
2256 .tx_frames_pending = ath9k_tx_frames_pending,
2257 .tx_last_beacon = ath9k_tx_last_beacon,
2258 .release_buffered_frames = ath9k_release_buffered_frames,
2259 .get_stats = ath9k_get_stats,
2260 .set_antenna = ath9k_set_antenna,
2261 .get_antenna = ath9k_get_antenna,
2263 #ifdef CONFIG_ATH9K_WOW
2264 .suspend = ath9k_suspend,
2265 .resume = ath9k_resume,
2266 .set_wakeup = ath9k_set_wakeup,
2269 #ifdef CONFIG_ATH9K_DEBUGFS
2270 .get_et_sset_count = ath9k_get_et_sset_count,
2271 .get_et_stats = ath9k_get_et_stats,
2272 .get_et_strings = ath9k_get_et_strings,
2275 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_STATION_STATISTICS)
2276 .sta_add_debugfs = ath9k_sta_add_debugfs,
2278 .sw_scan_start = ath9k_sw_scan_start,
2279 .sw_scan_complete = ath9k_sw_scan_complete,