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 ath9k_ps_wakeup(struct ath_softc *sc)
87 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
89 enum ath9k_power_mode power_mode;
91 spin_lock_irqsave(&sc->sc_pm_lock, flags);
92 if (++sc->ps_usecount != 1)
95 power_mode = sc->sc_ah->power_mode;
96 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
99 * While the hardware is asleep, the cycle counters contain no
100 * useful data. Better clear them now so that they don't mess up
101 * survey data results.
103 if (power_mode != ATH9K_PM_AWAKE) {
104 spin_lock(&common->cc_lock);
105 ath_hw_cycle_counters_update(common);
106 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
107 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
108 spin_unlock(&common->cc_lock);
112 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
115 void ath9k_ps_restore(struct ath_softc *sc)
117 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
118 enum ath9k_power_mode mode;
122 spin_lock_irqsave(&sc->sc_pm_lock, flags);
123 if (--sc->ps_usecount != 0)
127 ath9k_hw_setrxabort(sc->sc_ah, 1);
128 ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
129 mode = ATH9K_PM_FULL_SLEEP;
130 } else if (sc->ps_enabled &&
131 !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
133 PS_WAIT_FOR_PSPOLL_DATA |
136 mode = ATH9K_PM_NETWORK_SLEEP;
137 if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
138 ath9k_btcoex_stop_gen_timer(sc);
143 spin_lock(&common->cc_lock);
144 ath_hw_cycle_counters_update(common);
145 spin_unlock(&common->cc_lock);
147 ath9k_hw_setpower(sc->sc_ah, mode);
150 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
153 static void __ath_cancel_work(struct ath_softc *sc)
155 cancel_work_sync(&sc->paprd_work);
156 cancel_work_sync(&sc->hw_check_work);
157 cancel_delayed_work_sync(&sc->tx_complete_work);
158 cancel_delayed_work_sync(&sc->hw_pll_work);
160 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
161 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
162 cancel_work_sync(&sc->mci_work);
166 static void ath_cancel_work(struct ath_softc *sc)
168 __ath_cancel_work(sc);
169 cancel_work_sync(&sc->hw_reset_work);
172 static void ath_restart_work(struct ath_softc *sc)
174 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
176 if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9485(sc->sc_ah) ||
177 AR_SREV_9550(sc->sc_ah))
178 ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
179 msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
181 ath_start_rx_poll(sc, 3);
185 static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
187 struct ath_hw *ah = sc->sc_ah;
190 ieee80211_stop_queues(sc->hw);
192 sc->hw_busy_count = 0;
194 del_timer_sync(&sc->rx_poll_timer);
196 ath9k_debug_samp_bb_mac(sc);
197 ath9k_hw_disable_interrupts(ah);
199 if (!ath_stoprecv(sc))
202 if (!ath_drain_all_txq(sc, retry_tx))
206 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
207 ath_rx_tasklet(sc, 1, true);
208 ath_rx_tasklet(sc, 1, false);
216 static bool ath_complete_reset(struct ath_softc *sc, bool start)
218 struct ath_hw *ah = sc->sc_ah;
219 struct ath_common *common = ath9k_hw_common(ah);
222 if (ath_startrecv(sc) != 0) {
223 ath_err(common, "Unable to restart recv logic\n");
227 ath9k_cmn_update_txpow(ah, sc->curtxpow,
228 sc->config.txpowlimit, &sc->curtxpow);
230 clear_bit(SC_OP_HW_RESET, &sc->sc_flags);
231 ath9k_hw_set_interrupts(ah);
232 ath9k_hw_enable_interrupts(ah);
234 if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) {
235 if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
238 ath9k_set_beacon(sc);
240 if (ah->opmode == NL80211_IFTYPE_STATION &&
241 test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_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);
247 ath_restart_work(sc);
250 if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3)
251 ath_ant_comb_update(sc);
253 ieee80211_wake_queues(sc->hw);
258 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
261 struct ath_hw *ah = sc->sc_ah;
262 struct ath_common *common = ath9k_hw_common(ah);
263 struct ath9k_hw_cal_data *caldata = NULL;
268 __ath_cancel_work(sc);
270 spin_lock_bh(&sc->sc_pcu_lock);
272 if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
274 caldata = &sc->caldata;
283 if (!ath_prepare_reset(sc, retry_tx, flush))
286 ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
287 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
289 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
292 "Unable to reset channel, reset status %d\n", r);
296 if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
297 (sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL))
298 ath9k_mci_set_txpower(sc, true, false);
300 if (!ath_complete_reset(sc, true))
304 spin_unlock_bh(&sc->sc_pcu_lock);
310 * Set/change channels. If the channel is really being changed, it's done
311 * by reseting the chip. To accomplish this we must first cleanup any pending
312 * DMA, then restart stuff.
314 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
315 struct ath9k_channel *hchan)
319 if (test_bit(SC_OP_INVALID, &sc->sc_flags))
322 r = ath_reset_internal(sc, hchan, false);
327 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
328 struct ieee80211_vif *vif)
332 an = (struct ath_node *)sta->drv_priv;
338 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
339 ath_tx_node_init(sc, an);
340 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
341 sta->ht_cap.ampdu_factor);
342 density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density);
343 an->mpdudensity = density;
347 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
349 struct ath_node *an = (struct ath_node *)sta->drv_priv;
351 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
352 ath_tx_node_cleanup(sc, an);
355 void ath9k_tasklet(unsigned long data)
357 struct ath_softc *sc = (struct ath_softc *)data;
358 struct ath_hw *ah = sc->sc_ah;
359 struct ath_common *common = ath9k_hw_common(ah);
360 enum ath_reset_type type;
362 u32 status = sc->intrstatus;
366 spin_lock(&sc->sc_pcu_lock);
368 if ((status & ATH9K_INT_FATAL) ||
369 (status & ATH9K_INT_BB_WATCHDOG)) {
371 if (status & ATH9K_INT_FATAL)
372 type = RESET_TYPE_FATAL_INT;
374 type = RESET_TYPE_BB_WATCHDOG;
376 ath9k_queue_reset(sc, type);
380 spin_lock_irqsave(&sc->sc_pm_lock, flags);
381 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
383 * TSF sync does not look correct; remain awake to sync with
386 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
387 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
389 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
391 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
392 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
395 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
397 if (status & rxmask) {
398 /* Check for high priority Rx first */
399 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
400 (status & ATH9K_INT_RXHP))
401 ath_rx_tasklet(sc, 0, true);
403 ath_rx_tasklet(sc, 0, false);
406 if (status & ATH9K_INT_TX) {
407 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
408 ath_tx_edma_tasklet(sc);
413 ath9k_btcoex_handle_interrupt(sc, status);
416 /* re-enable hardware interrupt */
417 ath9k_hw_enable_interrupts(ah);
419 spin_unlock(&sc->sc_pcu_lock);
420 ath9k_ps_restore(sc);
423 irqreturn_t ath_isr(int irq, void *dev)
425 #define SCHED_INTR ( \
427 ATH9K_INT_BB_WATCHDOG | \
437 ATH9K_INT_GENTIMER | \
440 struct ath_softc *sc = dev;
441 struct ath_hw *ah = sc->sc_ah;
442 struct ath_common *common = ath9k_hw_common(ah);
443 enum ath9k_int status;
447 * The hardware is not ready/present, don't
448 * touch anything. Note this can happen early
449 * on if the IRQ is shared.
451 if (test_bit(SC_OP_INVALID, &sc->sc_flags))
454 /* shared irq, not for us */
456 if (!ath9k_hw_intrpend(ah))
459 if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) {
460 ath9k_hw_kill_interrupts(ah);
465 * Figure out the reason(s) for the interrupt. Note
466 * that the hal returns a pseudo-ISR that may include
467 * bits we haven't explicitly enabled so we mask the
468 * value to insure we only process bits we requested.
470 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
471 status &= ah->imask; /* discard unasked-for bits */
474 * If there are no status bits set, then this interrupt was not
475 * for me (should have been caught above).
480 /* Cache the status */
481 sc->intrstatus = status;
483 if (status & SCHED_INTR)
487 * If a FATAL or RXORN interrupt is received, we have to reset the
490 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
491 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
494 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
495 (status & ATH9K_INT_BB_WATCHDOG)) {
497 spin_lock(&common->cc_lock);
498 ath_hw_cycle_counters_update(common);
499 ar9003_hw_bb_watchdog_dbg_info(ah);
500 spin_unlock(&common->cc_lock);
504 #ifdef CONFIG_PM_SLEEP
505 if (status & ATH9K_INT_BMISS) {
506 if (atomic_read(&sc->wow_sleep_proc_intr) == 0) {
507 ath_dbg(common, ANY, "during WoW we got a BMISS\n");
508 atomic_inc(&sc->wow_got_bmiss_intr);
509 atomic_dec(&sc->wow_sleep_proc_intr);
513 if (status & ATH9K_INT_SWBA)
514 tasklet_schedule(&sc->bcon_tasklet);
516 if (status & ATH9K_INT_TXURN)
517 ath9k_hw_updatetxtriglevel(ah, true);
519 if (status & ATH9K_INT_RXEOL) {
520 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
521 ath9k_hw_set_interrupts(ah);
524 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
525 if (status & ATH9K_INT_TIM_TIMER) {
526 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
528 /* Clear RxAbort bit so that we can
530 ath9k_setpower(sc, ATH9K_PM_AWAKE);
531 spin_lock(&sc->sc_pm_lock);
532 ath9k_hw_setrxabort(sc->sc_ah, 0);
533 sc->ps_flags |= PS_WAIT_FOR_BEACON;
534 spin_unlock(&sc->sc_pm_lock);
539 ath_debug_stat_interrupt(sc, status);
542 /* turn off every interrupt */
543 ath9k_hw_disable_interrupts(ah);
544 tasklet_schedule(&sc->intr_tq);
552 static int ath_reset(struct ath_softc *sc, bool retry_tx)
558 r = ath_reset_internal(sc, NULL, retry_tx);
562 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
563 if (ATH_TXQ_SETUP(sc, i)) {
564 spin_lock_bh(&sc->tx.txq[i].axq_lock);
565 ath_txq_schedule(sc, &sc->tx.txq[i]);
566 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
571 ath9k_ps_restore(sc);
576 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
578 #ifdef CONFIG_ATH9K_DEBUGFS
579 RESET_STAT_INC(sc, type);
581 set_bit(SC_OP_HW_RESET, &sc->sc_flags);
582 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
585 void ath_reset_work(struct work_struct *work)
587 struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
592 /**********************/
593 /* mac80211 callbacks */
594 /**********************/
596 static int ath9k_start(struct ieee80211_hw *hw)
598 struct ath_softc *sc = hw->priv;
599 struct ath_hw *ah = sc->sc_ah;
600 struct ath_common *common = ath9k_hw_common(ah);
601 struct ieee80211_channel *curchan = hw->conf.channel;
602 struct ath9k_channel *init_channel;
605 ath_dbg(common, CONFIG,
606 "Starting driver with initial channel: %d MHz\n",
607 curchan->center_freq);
610 mutex_lock(&sc->mutex);
612 init_channel = ath9k_cmn_get_curchannel(hw, ah);
614 /* Reset SERDES registers */
615 ath9k_hw_configpcipowersave(ah, false);
618 * The basic interface to setting the hardware in a good
619 * state is ``reset''. On return the hardware is known to
620 * be powered up and with interrupts disabled. This must
621 * be followed by initialization of the appropriate bits
622 * and then setup of the interrupt mask.
624 spin_lock_bh(&sc->sc_pcu_lock);
626 atomic_set(&ah->intr_ref_cnt, -1);
628 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
631 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
632 r, curchan->center_freq);
633 ah->reset_power_on = false;
636 /* Setup our intr mask. */
637 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
638 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
641 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
642 ah->imask |= ATH9K_INT_RXHP |
644 ATH9K_INT_BB_WATCHDOG;
646 ah->imask |= ATH9K_INT_RX;
648 ah->imask |= ATH9K_INT_GTT;
650 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
651 ah->imask |= ATH9K_INT_CST;
655 clear_bit(SC_OP_INVALID, &sc->sc_flags);
656 sc->sc_ah->is_monitoring = false;
658 if (!ath_complete_reset(sc, false))
659 ah->reset_power_on = false;
661 if (ah->led_pin >= 0) {
662 ath9k_hw_cfg_output(ah, ah->led_pin,
663 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
664 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
668 * Reset key cache to sane defaults (all entries cleared) instead of
669 * semi-random values after suspend/resume.
671 ath9k_cmn_init_crypto(sc->sc_ah);
673 spin_unlock_bh(&sc->sc_pcu_lock);
675 mutex_unlock(&sc->mutex);
677 ath9k_ps_restore(sc);
682 static void ath9k_tx(struct ieee80211_hw *hw,
683 struct ieee80211_tx_control *control,
686 struct ath_softc *sc = hw->priv;
687 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
688 struct ath_tx_control txctl;
689 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
692 if (sc->ps_enabled) {
694 * mac80211 does not set PM field for normal data frames, so we
695 * need to update that based on the current PS mode.
697 if (ieee80211_is_data(hdr->frame_control) &&
698 !ieee80211_is_nullfunc(hdr->frame_control) &&
699 !ieee80211_has_pm(hdr->frame_control)) {
701 "Add PM=1 for a TX frame while in PS mode\n");
702 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
706 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
708 * We are using PS-Poll and mac80211 can request TX while in
709 * power save mode. Need to wake up hardware for the TX to be
710 * completed and if needed, also for RX of buffered frames.
713 spin_lock_irqsave(&sc->sc_pm_lock, flags);
714 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
715 ath9k_hw_setrxabort(sc->sc_ah, 0);
716 if (ieee80211_is_pspoll(hdr->frame_control)) {
718 "Sending PS-Poll to pick a buffered frame\n");
719 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
721 ath_dbg(common, PS, "Wake up to complete TX\n");
722 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
725 * The actual restore operation will happen only after
726 * the ps_flags bit is cleared. We are just dropping
727 * the ps_usecount here.
729 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
730 ath9k_ps_restore(sc);
734 * Cannot tx while the hardware is in full sleep, it first needs a full
735 * chip reset to recover from that
737 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
738 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
742 memset(&txctl, 0, sizeof(struct ath_tx_control));
743 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
744 txctl.sta = control->sta;
746 ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
748 if (ath_tx_start(hw, skb, &txctl) != 0) {
749 ath_dbg(common, XMIT, "TX failed\n");
750 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
756 ieee80211_free_txskb(hw, skb);
759 static void ath9k_stop(struct ieee80211_hw *hw)
761 struct ath_softc *sc = hw->priv;
762 struct ath_hw *ah = sc->sc_ah;
763 struct ath_common *common = ath9k_hw_common(ah);
766 mutex_lock(&sc->mutex);
769 del_timer_sync(&sc->rx_poll_timer);
771 if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
772 ath_dbg(common, ANY, "Device not present\n");
773 mutex_unlock(&sc->mutex);
777 /* Ensure HW is awake when we try to shut it down. */
780 spin_lock_bh(&sc->sc_pcu_lock);
782 /* prevent tasklets to enable interrupts once we disable them */
783 ah->imask &= ~ATH9K_INT_GLOBAL;
785 /* make sure h/w will not generate any interrupt
786 * before setting the invalid flag. */
787 ath9k_hw_disable_interrupts(ah);
789 spin_unlock_bh(&sc->sc_pcu_lock);
791 /* we can now sync irq and kill any running tasklets, since we already
792 * disabled interrupts and not holding a spin lock */
793 synchronize_irq(sc->irq);
794 tasklet_kill(&sc->intr_tq);
795 tasklet_kill(&sc->bcon_tasklet);
797 prev_idle = sc->ps_idle;
800 spin_lock_bh(&sc->sc_pcu_lock);
802 if (ah->led_pin >= 0) {
803 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
804 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
807 ath_prepare_reset(sc, false, true);
810 dev_kfree_skb_any(sc->rx.frag);
815 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
817 ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
818 ath9k_hw_phy_disable(ah);
820 ath9k_hw_configpcipowersave(ah, true);
822 spin_unlock_bh(&sc->sc_pcu_lock);
824 ath9k_ps_restore(sc);
826 set_bit(SC_OP_INVALID, &sc->sc_flags);
827 sc->ps_idle = prev_idle;
829 mutex_unlock(&sc->mutex);
831 ath_dbg(common, CONFIG, "Driver halt\n");
834 bool ath9k_uses_beacons(int type)
837 case NL80211_IFTYPE_AP:
838 case NL80211_IFTYPE_ADHOC:
839 case NL80211_IFTYPE_MESH_POINT:
846 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
848 struct ath9k_vif_iter_data *iter_data = data;
851 if (iter_data->hw_macaddr)
852 for (i = 0; i < ETH_ALEN; i++)
853 iter_data->mask[i] &=
854 ~(iter_data->hw_macaddr[i] ^ mac[i]);
857 case NL80211_IFTYPE_AP:
860 case NL80211_IFTYPE_STATION:
861 iter_data->nstations++;
863 case NL80211_IFTYPE_ADHOC:
864 iter_data->nadhocs++;
866 case NL80211_IFTYPE_MESH_POINT:
867 iter_data->nmeshes++;
869 case NL80211_IFTYPE_WDS:
877 static void ath9k_sta_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
879 struct ath_softc *sc = data;
880 struct ath_vif *avp = (void *)vif->drv_priv;
882 if (vif->type != NL80211_IFTYPE_STATION)
885 if (avp->primary_sta_vif)
886 ath9k_set_assoc_state(sc, vif);
889 /* Called with sc->mutex held. */
890 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
891 struct ieee80211_vif *vif,
892 struct ath9k_vif_iter_data *iter_data)
894 struct ath_softc *sc = hw->priv;
895 struct ath_hw *ah = sc->sc_ah;
896 struct ath_common *common = ath9k_hw_common(ah);
899 * Use the hardware MAC address as reference, the hardware uses it
900 * together with the BSSID mask when matching addresses.
902 memset(iter_data, 0, sizeof(*iter_data));
903 iter_data->hw_macaddr = common->macaddr;
904 memset(&iter_data->mask, 0xff, ETH_ALEN);
907 ath9k_vif_iter(iter_data, vif->addr, vif);
909 /* Get list of all active MAC addresses */
910 ieee80211_iterate_active_interfaces_atomic(
911 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
912 ath9k_vif_iter, iter_data);
915 /* Called with sc->mutex held. */
916 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
917 struct ieee80211_vif *vif)
919 struct ath_softc *sc = hw->priv;
920 struct ath_hw *ah = sc->sc_ah;
921 struct ath_common *common = ath9k_hw_common(ah);
922 struct ath9k_vif_iter_data iter_data;
923 enum nl80211_iftype old_opmode = ah->opmode;
925 ath9k_calculate_iter_data(hw, vif, &iter_data);
927 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
928 ath_hw_setbssidmask(common);
930 if (iter_data.naps > 0) {
931 ath9k_hw_set_tsfadjust(ah, true);
932 ah->opmode = NL80211_IFTYPE_AP;
934 ath9k_hw_set_tsfadjust(ah, false);
936 if (iter_data.nmeshes)
937 ah->opmode = NL80211_IFTYPE_MESH_POINT;
938 else if (iter_data.nwds)
939 ah->opmode = NL80211_IFTYPE_AP;
940 else if (iter_data.nadhocs)
941 ah->opmode = NL80211_IFTYPE_ADHOC;
943 ah->opmode = NL80211_IFTYPE_STATION;
946 ath9k_hw_setopmode(ah);
948 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
949 ah->imask |= ATH9K_INT_TSFOOR;
951 ah->imask &= ~ATH9K_INT_TSFOOR;
953 ath9k_hw_set_interrupts(ah);
956 * If we are changing the opmode to STATION,
957 * a beacon sync needs to be done.
959 if (ah->opmode == NL80211_IFTYPE_STATION &&
960 old_opmode == NL80211_IFTYPE_AP &&
961 test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
962 ieee80211_iterate_active_interfaces_atomic(
963 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
964 ath9k_sta_vif_iter, sc);
968 static int ath9k_add_interface(struct ieee80211_hw *hw,
969 struct ieee80211_vif *vif)
971 struct ath_softc *sc = hw->priv;
972 struct ath_hw *ah = sc->sc_ah;
973 struct ath_common *common = ath9k_hw_common(ah);
975 mutex_lock(&sc->mutex);
977 ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
981 ath9k_calculate_summary_state(hw, vif);
982 ath9k_ps_restore(sc);
984 if (ath9k_uses_beacons(vif->type))
985 ath9k_beacon_assign_slot(sc, vif);
987 mutex_unlock(&sc->mutex);
991 static int ath9k_change_interface(struct ieee80211_hw *hw,
992 struct ieee80211_vif *vif,
993 enum nl80211_iftype new_type,
996 struct ath_softc *sc = hw->priv;
997 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
999 ath_dbg(common, CONFIG, "Change Interface\n");
1000 mutex_lock(&sc->mutex);
1002 if (ath9k_uses_beacons(vif->type))
1003 ath9k_beacon_remove_slot(sc, vif);
1005 vif->type = new_type;
1008 ath9k_ps_wakeup(sc);
1009 ath9k_calculate_summary_state(hw, vif);
1010 ath9k_ps_restore(sc);
1012 if (ath9k_uses_beacons(vif->type))
1013 ath9k_beacon_assign_slot(sc, vif);
1015 mutex_unlock(&sc->mutex);
1019 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1020 struct ieee80211_vif *vif)
1022 struct ath_softc *sc = hw->priv;
1023 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1025 ath_dbg(common, CONFIG, "Detach Interface\n");
1027 mutex_lock(&sc->mutex);
1031 if (ath9k_uses_beacons(vif->type))
1032 ath9k_beacon_remove_slot(sc, vif);
1034 ath9k_ps_wakeup(sc);
1035 ath9k_calculate_summary_state(hw, NULL);
1036 ath9k_ps_restore(sc);
1038 mutex_unlock(&sc->mutex);
1041 static void ath9k_enable_ps(struct ath_softc *sc)
1043 struct ath_hw *ah = sc->sc_ah;
1044 struct ath_common *common = ath9k_hw_common(ah);
1046 sc->ps_enabled = true;
1047 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1048 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1049 ah->imask |= ATH9K_INT_TIM_TIMER;
1050 ath9k_hw_set_interrupts(ah);
1052 ath9k_hw_setrxabort(ah, 1);
1054 ath_dbg(common, PS, "PowerSave enabled\n");
1057 static void ath9k_disable_ps(struct ath_softc *sc)
1059 struct ath_hw *ah = sc->sc_ah;
1060 struct ath_common *common = ath9k_hw_common(ah);
1062 sc->ps_enabled = false;
1063 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1064 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1065 ath9k_hw_setrxabort(ah, 0);
1066 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1068 PS_WAIT_FOR_PSPOLL_DATA |
1069 PS_WAIT_FOR_TX_ACK);
1070 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1071 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1072 ath9k_hw_set_interrupts(ah);
1075 ath_dbg(common, PS, "PowerSave disabled\n");
1078 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1080 struct ath_softc *sc = hw->priv;
1081 struct ath_hw *ah = sc->sc_ah;
1082 struct ath_common *common = ath9k_hw_common(ah);
1083 struct ieee80211_conf *conf = &hw->conf;
1084 bool reset_channel = false;
1086 ath9k_ps_wakeup(sc);
1087 mutex_lock(&sc->mutex);
1089 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1090 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1092 ath_cancel_work(sc);
1093 ath9k_stop_btcoex(sc);
1095 ath9k_start_btcoex(sc);
1097 * The chip needs a reset to properly wake up from
1100 reset_channel = ah->chip_fullsleep;
1105 * We just prepare to enable PS. We have to wait until our AP has
1106 * ACK'd our null data frame to disable RX otherwise we'll ignore
1107 * those ACKs and end up retransmitting the same null data frames.
1108 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1110 if (changed & IEEE80211_CONF_CHANGE_PS) {
1111 unsigned long flags;
1112 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1113 if (conf->flags & IEEE80211_CONF_PS)
1114 ath9k_enable_ps(sc);
1116 ath9k_disable_ps(sc);
1117 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1120 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1121 if (conf->flags & IEEE80211_CONF_MONITOR) {
1122 ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1123 sc->sc_ah->is_monitoring = true;
1125 ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1126 sc->sc_ah->is_monitoring = false;
1130 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
1131 struct ieee80211_channel *curchan = hw->conf.channel;
1132 int pos = curchan->hw_value;
1134 unsigned long flags;
1137 old_pos = ah->curchan - &ah->channels[0];
1139 ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
1140 curchan->center_freq, conf->channel_type);
1142 /* update survey stats for the old channel before switching */
1143 spin_lock_irqsave(&common->cc_lock, flags);
1144 ath_update_survey_stats(sc);
1145 spin_unlock_irqrestore(&common->cc_lock, flags);
1148 * Preserve the current channel values, before updating
1151 if (ah->curchan && (old_pos == pos))
1152 ath9k_hw_getnf(ah, ah->curchan);
1154 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1155 curchan, conf->channel_type);
1158 * If the operating channel changes, change the survey in-use flags
1160 * Reset the survey data for the new channel, unless we're switching
1161 * back to the operating channel from an off-channel operation.
1163 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1164 sc->cur_survey != &sc->survey[pos]) {
1167 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1169 sc->cur_survey = &sc->survey[pos];
1171 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1172 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1173 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1174 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1177 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1178 ath_err(common, "Unable to set channel\n");
1179 mutex_unlock(&sc->mutex);
1180 ath9k_ps_restore(sc);
1185 * The most recent snapshot of channel->noisefloor for the old
1186 * channel is only available after the hardware reset. Copy it to
1187 * the survey stats now.
1190 ath_update_survey_nf(sc, old_pos);
1193 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1194 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1195 sc->config.txpowlimit = 2 * conf->power_level;
1196 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1197 sc->config.txpowlimit, &sc->curtxpow);
1200 mutex_unlock(&sc->mutex);
1201 ath9k_ps_restore(sc);
1206 #define SUPPORTED_FILTERS \
1207 (FIF_PROMISC_IN_BSS | \
1212 FIF_BCN_PRBRESP_PROMISC | \
1216 /* FIXME: sc->sc_full_reset ? */
1217 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1218 unsigned int changed_flags,
1219 unsigned int *total_flags,
1222 struct ath_softc *sc = hw->priv;
1225 changed_flags &= SUPPORTED_FILTERS;
1226 *total_flags &= SUPPORTED_FILTERS;
1228 sc->rx.rxfilter = *total_flags;
1229 ath9k_ps_wakeup(sc);
1230 rfilt = ath_calcrxfilter(sc);
1231 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1232 ath9k_ps_restore(sc);
1234 ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1238 static int ath9k_sta_add(struct ieee80211_hw *hw,
1239 struct ieee80211_vif *vif,
1240 struct ieee80211_sta *sta)
1242 struct ath_softc *sc = hw->priv;
1243 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1244 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1245 struct ieee80211_key_conf ps_key = { };
1247 ath_node_attach(sc, sta, vif);
1249 if (vif->type != NL80211_IFTYPE_AP &&
1250 vif->type != NL80211_IFTYPE_AP_VLAN)
1253 an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1258 static void ath9k_del_ps_key(struct ath_softc *sc,
1259 struct ieee80211_vif *vif,
1260 struct ieee80211_sta *sta)
1262 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1263 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1264 struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1269 ath_key_delete(common, &ps_key);
1272 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1273 struct ieee80211_vif *vif,
1274 struct ieee80211_sta *sta)
1276 struct ath_softc *sc = hw->priv;
1278 ath9k_del_ps_key(sc, vif, sta);
1279 ath_node_detach(sc, sta);
1284 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1285 struct ieee80211_vif *vif,
1286 enum sta_notify_cmd cmd,
1287 struct ieee80211_sta *sta)
1289 struct ath_softc *sc = hw->priv;
1290 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1292 if (!sta->ht_cap.ht_supported)
1296 case STA_NOTIFY_SLEEP:
1297 an->sleeping = true;
1298 ath_tx_aggr_sleep(sta, sc, an);
1300 case STA_NOTIFY_AWAKE:
1301 an->sleeping = false;
1302 ath_tx_aggr_wakeup(sc, an);
1307 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1308 struct ieee80211_vif *vif, u16 queue,
1309 const struct ieee80211_tx_queue_params *params)
1311 struct ath_softc *sc = hw->priv;
1312 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1313 struct ath_txq *txq;
1314 struct ath9k_tx_queue_info qi;
1317 if (queue >= IEEE80211_NUM_ACS)
1320 txq = sc->tx.txq_map[queue];
1322 ath9k_ps_wakeup(sc);
1323 mutex_lock(&sc->mutex);
1325 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1327 qi.tqi_aifs = params->aifs;
1328 qi.tqi_cwmin = params->cw_min;
1329 qi.tqi_cwmax = params->cw_max;
1330 qi.tqi_burstTime = params->txop * 32;
1332 ath_dbg(common, CONFIG,
1333 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1334 queue, txq->axq_qnum, params->aifs, params->cw_min,
1335 params->cw_max, params->txop);
1337 ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1338 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1340 ath_err(common, "TXQ Update failed\n");
1342 mutex_unlock(&sc->mutex);
1343 ath9k_ps_restore(sc);
1348 static int ath9k_set_key(struct ieee80211_hw *hw,
1349 enum set_key_cmd cmd,
1350 struct ieee80211_vif *vif,
1351 struct ieee80211_sta *sta,
1352 struct ieee80211_key_conf *key)
1354 struct ath_softc *sc = hw->priv;
1355 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1358 if (ath9k_modparam_nohwcrypt)
1361 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1362 vif->type == NL80211_IFTYPE_MESH_POINT) &&
1363 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1364 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1365 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1367 * For now, disable hw crypto for the RSN IBSS group keys. This
1368 * could be optimized in the future to use a modified key cache
1369 * design to support per-STA RX GTK, but until that gets
1370 * implemented, use of software crypto for group addressed
1371 * frames is a acceptable to allow RSN IBSS to be used.
1376 mutex_lock(&sc->mutex);
1377 ath9k_ps_wakeup(sc);
1378 ath_dbg(common, CONFIG, "Set HW Key\n");
1383 ath9k_del_ps_key(sc, vif, sta);
1385 ret = ath_key_config(common, vif, sta, key);
1387 key->hw_key_idx = ret;
1388 /* push IV and Michael MIC generation to stack */
1389 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1390 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1391 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1392 if (sc->sc_ah->sw_mgmt_crypto &&
1393 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1394 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1399 ath_key_delete(common, key);
1405 ath9k_ps_restore(sc);
1406 mutex_unlock(&sc->mutex);
1411 static void ath9k_set_assoc_state(struct ath_softc *sc,
1412 struct ieee80211_vif *vif)
1414 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1415 struct ath_vif *avp = (void *)vif->drv_priv;
1416 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1417 unsigned long flags;
1419 set_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
1420 avp->primary_sta_vif = true;
1423 * Set the AID, BSSID and do beacon-sync only when
1424 * the HW opmode is STATION.
1426 * But the primary bit is set above in any case.
1428 if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1431 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1432 common->curaid = bss_conf->aid;
1433 ath9k_hw_write_associd(sc->sc_ah);
1435 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1436 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1438 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1439 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1440 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1442 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1443 ath9k_mci_update_wlan_channels(sc, false);
1445 ath_dbg(common, CONFIG,
1446 "Primary Station interface: %pM, BSSID: %pM\n",
1447 vif->addr, common->curbssid);
1450 static void ath9k_bss_assoc_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1452 struct ath_softc *sc = data;
1453 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1455 if (test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags))
1458 if (bss_conf->assoc)
1459 ath9k_set_assoc_state(sc, vif);
1462 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1463 struct ieee80211_vif *vif,
1464 struct ieee80211_bss_conf *bss_conf,
1468 (BSS_CHANGED_ASSOC | \
1469 BSS_CHANGED_IBSS | \
1470 BSS_CHANGED_BEACON_ENABLED)
1472 struct ath_softc *sc = hw->priv;
1473 struct ath_hw *ah = sc->sc_ah;
1474 struct ath_common *common = ath9k_hw_common(ah);
1475 struct ath_vif *avp = (void *)vif->drv_priv;
1478 ath9k_ps_wakeup(sc);
1479 mutex_lock(&sc->mutex);
1481 if (changed & BSS_CHANGED_ASSOC) {
1482 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
1483 bss_conf->bssid, bss_conf->assoc);
1485 if (avp->primary_sta_vif && !bss_conf->assoc) {
1486 clear_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
1487 avp->primary_sta_vif = false;
1489 if (ah->opmode == NL80211_IFTYPE_STATION)
1490 clear_bit(SC_OP_BEACONS, &sc->sc_flags);
1493 ieee80211_iterate_active_interfaces_atomic(
1494 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1495 ath9k_bss_assoc_iter, sc);
1497 if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags) &&
1498 ah->opmode == NL80211_IFTYPE_STATION) {
1499 memset(common->curbssid, 0, ETH_ALEN);
1501 ath9k_hw_write_associd(sc->sc_ah);
1502 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1503 ath9k_mci_update_wlan_channels(sc, true);
1507 if (changed & BSS_CHANGED_IBSS) {
1508 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1509 common->curaid = bss_conf->aid;
1510 ath9k_hw_write_associd(sc->sc_ah);
1513 if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
1514 (changed & BSS_CHANGED_BEACON_INT)) {
1515 if (ah->opmode == NL80211_IFTYPE_AP &&
1516 bss_conf->enable_beacon)
1517 ath9k_set_tsfadjust(sc, vif);
1518 if (ath9k_allow_beacon_config(sc, vif))
1519 ath9k_beacon_config(sc, vif, changed);
1522 if (changed & BSS_CHANGED_ERP_SLOT) {
1523 if (bss_conf->use_short_slot)
1527 if (vif->type == NL80211_IFTYPE_AP) {
1529 * Defer update, so that connected stations can adjust
1530 * their settings at the same time.
1531 * See beacon.c for more details
1533 sc->beacon.slottime = slottime;
1534 sc->beacon.updateslot = UPDATE;
1536 ah->slottime = slottime;
1537 ath9k_hw_init_global_settings(ah);
1541 if (changed & CHECK_ANI)
1544 mutex_unlock(&sc->mutex);
1545 ath9k_ps_restore(sc);
1550 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1552 struct ath_softc *sc = hw->priv;
1555 mutex_lock(&sc->mutex);
1556 ath9k_ps_wakeup(sc);
1557 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1558 ath9k_ps_restore(sc);
1559 mutex_unlock(&sc->mutex);
1564 static void ath9k_set_tsf(struct ieee80211_hw *hw,
1565 struct ieee80211_vif *vif,
1568 struct ath_softc *sc = hw->priv;
1570 mutex_lock(&sc->mutex);
1571 ath9k_ps_wakeup(sc);
1572 ath9k_hw_settsf64(sc->sc_ah, tsf);
1573 ath9k_ps_restore(sc);
1574 mutex_unlock(&sc->mutex);
1577 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1579 struct ath_softc *sc = hw->priv;
1581 mutex_lock(&sc->mutex);
1583 ath9k_ps_wakeup(sc);
1584 ath9k_hw_reset_tsf(sc->sc_ah);
1585 ath9k_ps_restore(sc);
1587 mutex_unlock(&sc->mutex);
1590 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1591 struct ieee80211_vif *vif,
1592 enum ieee80211_ampdu_mlme_action action,
1593 struct ieee80211_sta *sta,
1594 u16 tid, u16 *ssn, u8 buf_size)
1596 struct ath_softc *sc = hw->priv;
1602 case IEEE80211_AMPDU_RX_START:
1604 case IEEE80211_AMPDU_RX_STOP:
1606 case IEEE80211_AMPDU_TX_START:
1607 ath9k_ps_wakeup(sc);
1608 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1610 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1611 ath9k_ps_restore(sc);
1613 case IEEE80211_AMPDU_TX_STOP:
1614 ath9k_ps_wakeup(sc);
1615 ath_tx_aggr_stop(sc, sta, tid);
1616 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1617 ath9k_ps_restore(sc);
1619 case IEEE80211_AMPDU_TX_OPERATIONAL:
1620 ath9k_ps_wakeup(sc);
1621 ath_tx_aggr_resume(sc, sta, tid);
1622 ath9k_ps_restore(sc);
1625 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
1633 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
1634 struct survey_info *survey)
1636 struct ath_softc *sc = hw->priv;
1637 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1638 struct ieee80211_supported_band *sband;
1639 struct ieee80211_channel *chan;
1640 unsigned long flags;
1643 spin_lock_irqsave(&common->cc_lock, flags);
1645 ath_update_survey_stats(sc);
1647 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
1648 if (sband && idx >= sband->n_channels) {
1649 idx -= sband->n_channels;
1654 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
1656 if (!sband || idx >= sband->n_channels) {
1657 spin_unlock_irqrestore(&common->cc_lock, flags);
1661 chan = &sband->channels[idx];
1662 pos = chan->hw_value;
1663 memcpy(survey, &sc->survey[pos], sizeof(*survey));
1664 survey->channel = chan;
1665 spin_unlock_irqrestore(&common->cc_lock, flags);
1670 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
1672 struct ath_softc *sc = hw->priv;
1673 struct ath_hw *ah = sc->sc_ah;
1675 mutex_lock(&sc->mutex);
1676 ah->coverage_class = coverage_class;
1678 ath9k_ps_wakeup(sc);
1679 ath9k_hw_init_global_settings(ah);
1680 ath9k_ps_restore(sc);
1682 mutex_unlock(&sc->mutex);
1685 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
1687 struct ath_softc *sc = hw->priv;
1688 struct ath_hw *ah = sc->sc_ah;
1689 struct ath_common *common = ath9k_hw_common(ah);
1690 int timeout = 200; /* ms */
1694 mutex_lock(&sc->mutex);
1695 cancel_delayed_work_sync(&sc->tx_complete_work);
1697 if (ah->ah_flags & AH_UNPLUGGED) {
1698 ath_dbg(common, ANY, "Device has been unplugged!\n");
1699 mutex_unlock(&sc->mutex);
1703 if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
1704 ath_dbg(common, ANY, "Device not present\n");
1705 mutex_unlock(&sc->mutex);
1709 for (j = 0; j < timeout; j++) {
1713 usleep_range(1000, 2000);
1715 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1716 if (!ATH_TXQ_SETUP(sc, i))
1719 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
1730 ath9k_ps_wakeup(sc);
1731 spin_lock_bh(&sc->sc_pcu_lock);
1732 drain_txq = ath_drain_all_txq(sc, false);
1733 spin_unlock_bh(&sc->sc_pcu_lock);
1736 ath_reset(sc, false);
1738 ath9k_ps_restore(sc);
1739 ieee80211_wake_queues(hw);
1742 ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
1743 mutex_unlock(&sc->mutex);
1746 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
1748 struct ath_softc *sc = hw->priv;
1751 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1752 if (!ATH_TXQ_SETUP(sc, i))
1755 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
1761 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
1763 struct ath_softc *sc = hw->priv;
1764 struct ath_hw *ah = sc->sc_ah;
1765 struct ieee80211_vif *vif;
1766 struct ath_vif *avp;
1768 struct ath_tx_status ts;
1769 bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
1772 vif = sc->beacon.bslot[0];
1776 if (!vif->bss_conf.enable_beacon)
1779 avp = (void *)vif->drv_priv;
1781 if (!sc->beacon.tx_processed && !edma) {
1782 tasklet_disable(&sc->bcon_tasklet);
1785 if (!bf || !bf->bf_mpdu)
1788 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
1789 if (status == -EINPROGRESS)
1792 sc->beacon.tx_processed = true;
1793 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
1796 tasklet_enable(&sc->bcon_tasklet);
1799 return sc->beacon.tx_last;
1802 static int ath9k_get_stats(struct ieee80211_hw *hw,
1803 struct ieee80211_low_level_stats *stats)
1805 struct ath_softc *sc = hw->priv;
1806 struct ath_hw *ah = sc->sc_ah;
1807 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
1809 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
1810 stats->dot11RTSFailureCount = mib_stats->rts_bad;
1811 stats->dot11FCSErrorCount = mib_stats->fcs_bad;
1812 stats->dot11RTSSuccessCount = mib_stats->rts_good;
1816 static u32 fill_chainmask(u32 cap, u32 new)
1821 for (i = 0; cap && new; i++, cap >>= 1) {
1822 if (!(cap & BIT(0)))
1834 static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
1836 switch (val & 0x7) {
1842 return (ah->caps.rx_chainmask == 1);
1848 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
1850 struct ath_softc *sc = hw->priv;
1851 struct ath_hw *ah = sc->sc_ah;
1853 if (ah->caps.rx_chainmask != 1)
1856 if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
1859 sc->ant_rx = rx_ant;
1860 sc->ant_tx = tx_ant;
1862 if (ah->caps.rx_chainmask == 1)
1865 /* AR9100 runs into calibration issues if not all rx chains are enabled */
1866 if (AR_SREV_9100(ah))
1867 ah->rxchainmask = 0x7;
1869 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
1871 ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
1872 ath9k_reload_chainmask_settings(sc);
1877 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
1879 struct ath_softc *sc = hw->priv;
1881 *tx_ant = sc->ant_tx;
1882 *rx_ant = sc->ant_rx;
1886 #ifdef CONFIG_PM_SLEEP
1888 static void ath9k_wow_map_triggers(struct ath_softc *sc,
1889 struct cfg80211_wowlan *wowlan,
1892 if (wowlan->disconnect)
1893 *wow_triggers |= AH_WOW_LINK_CHANGE |
1895 if (wowlan->magic_pkt)
1896 *wow_triggers |= AH_WOW_MAGIC_PATTERN_EN;
1898 if (wowlan->n_patterns)
1899 *wow_triggers |= AH_WOW_USER_PATTERN_EN;
1901 sc->wow_enabled = *wow_triggers;
1905 static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
1907 struct ath_hw *ah = sc->sc_ah;
1908 struct ath_common *common = ath9k_hw_common(ah);
1909 struct ath9k_hw_capabilities *pcaps = &ah->caps;
1910 int pattern_count = 0;
1912 u8 dis_deauth_pattern[MAX_PATTERN_SIZE];
1913 u8 dis_deauth_mask[MAX_PATTERN_SIZE];
1915 memset(dis_deauth_pattern, 0, MAX_PATTERN_SIZE);
1916 memset(dis_deauth_mask, 0, MAX_PATTERN_SIZE);
1919 * Create Dissassociate / Deauthenticate packet filter
1921 * 2 bytes 2 byte 6 bytes 6 bytes 6 bytes
1922 * +--------------+----------+---------+--------+--------+----
1923 * + Frame Control+ Duration + DA + SA + BSSID +
1924 * +--------------+----------+---------+--------+--------+----
1926 * The above is the management frame format for disassociate/
1927 * deauthenticate pattern, from this we need to match the first byte
1928 * of 'Frame Control' and DA, SA, and BSSID fields
1929 * (skipping 2nd byte of FC and Duration feild.
1931 * Disassociate pattern
1932 * --------------------
1933 * Frame control = 00 00 1010
1934 * DA, SA, BSSID = x:x:x:x:x:x
1935 * Pattern will be A0000000 | x:x:x:x:x:x | x:x:x:x:x:x
1936 * | x:x:x:x:x:x -- 22 bytes
1938 * Deauthenticate pattern
1939 * ----------------------
1940 * Frame control = 00 00 1100
1941 * DA, SA, BSSID = x:x:x:x:x:x
1942 * Pattern will be C0000000 | x:x:x:x:x:x | x:x:x:x:x:x
1943 * | x:x:x:x:x:x -- 22 bytes
1946 /* Create Disassociate Pattern first */
1950 /* Fill out the mask with all FF's */
1952 for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++)
1953 dis_deauth_mask[i] = 0xff;
1955 /* copy the first byte of frame control field */
1956 dis_deauth_pattern[byte_cnt] = 0xa0;
1959 /* skip 2nd byte of frame control and Duration field */
1963 * need not match the destination mac address, it can be a broadcast
1964 * mac address or an unicast to this station
1968 /* copy the source mac address */
1969 memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
1973 /* copy the bssid, its same as the source mac address */
1975 memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
1977 /* Create Disassociate pattern mask */
1979 if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_EXACT) {
1981 if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_DWORD) {
1983 * for AR9280, because of hardware limitation, the
1984 * first 4 bytes have to be matched for all patterns.
1985 * the mask for disassociation and de-auth pattern
1986 * matching need to enable the first 4 bytes.
1987 * also the duration field needs to be filled.
1989 dis_deauth_mask[0] = 0xf0;
1992 * fill in duration field
1993 FIXME: what is the exact value ?
1995 dis_deauth_pattern[2] = 0xff;
1996 dis_deauth_pattern[3] = 0xff;
1998 dis_deauth_mask[0] = 0xfe;
2001 dis_deauth_mask[1] = 0x03;
2002 dis_deauth_mask[2] = 0xc0;
2004 dis_deauth_mask[0] = 0xef;
2005 dis_deauth_mask[1] = 0x3f;
2006 dis_deauth_mask[2] = 0x00;
2007 dis_deauth_mask[3] = 0xfc;
2010 ath_dbg(common, WOW, "Adding disassoc/deauth patterns for WoW\n");
2012 ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
2013 pattern_count, byte_cnt);
2017 * for de-authenticate pattern, only the first byte of the frame
2018 * control field gets changed from 0xA0 to 0xC0
2020 dis_deauth_pattern[0] = 0xC0;
2022 ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
2023 pattern_count, byte_cnt);
2027 static void ath9k_wow_add_pattern(struct ath_softc *sc,
2028 struct cfg80211_wowlan *wowlan)
2030 struct ath_hw *ah = sc->sc_ah;
2031 struct ath9k_wow_pattern *wow_pattern = NULL;
2032 struct cfg80211_wowlan_trig_pkt_pattern *patterns = wowlan->patterns;
2036 if (!wowlan->n_patterns)
2040 * Add the new user configured patterns
2042 for (i = 0; i < wowlan->n_patterns; i++) {
2044 wow_pattern = kzalloc(sizeof(*wow_pattern), GFP_KERNEL);
2050 * TODO: convert the generic user space pattern to
2051 * appropriate chip specific/802.11 pattern.
2054 mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
2055 memset(wow_pattern->pattern_bytes, 0, MAX_PATTERN_SIZE);
2056 memset(wow_pattern->mask_bytes, 0, MAX_PATTERN_SIZE);
2057 memcpy(wow_pattern->pattern_bytes, patterns[i].pattern,
2058 patterns[i].pattern_len);
2059 memcpy(wow_pattern->mask_bytes, patterns[i].mask, mask_len);
2060 wow_pattern->pattern_len = patterns[i].pattern_len;
2063 * just need to take care of deauth and disssoc pattern,
2064 * make sure we don't overwrite them.
2067 ath9k_hw_wow_apply_pattern(ah, wow_pattern->pattern_bytes,
2068 wow_pattern->mask_bytes,
2070 wow_pattern->pattern_len);
2077 static int ath9k_suspend(struct ieee80211_hw *hw,
2078 struct cfg80211_wowlan *wowlan)
2080 struct ath_softc *sc = hw->priv;
2081 struct ath_hw *ah = sc->sc_ah;
2082 struct ath_common *common = ath9k_hw_common(ah);
2083 u32 wow_triggers_enabled = 0;
2086 mutex_lock(&sc->mutex);
2088 ath_cancel_work(sc);
2090 del_timer_sync(&sc->rx_poll_timer);
2092 if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
2093 ath_dbg(common, ANY, "Device not present\n");
2098 if (WARN_ON(!wowlan)) {
2099 ath_dbg(common, WOW, "None of the WoW triggers enabled\n");
2104 if (!device_can_wakeup(sc->dev)) {
2105 ath_dbg(common, WOW, "device_can_wakeup failed, WoW is not enabled\n");
2111 * none of the sta vifs are associated
2112 * and we are not currently handling multivif
2113 * cases, for instance we have to seperately
2114 * configure 'keep alive frame' for each
2118 if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
2119 ath_dbg(common, WOW, "None of the STA vifs are associated\n");
2124 if (sc->nvifs > 1) {
2125 ath_dbg(common, WOW, "WoW for multivif is not yet supported\n");
2130 ath9k_wow_map_triggers(sc, wowlan, &wow_triggers_enabled);
2132 ath_dbg(common, WOW, "WoW triggers enabled 0x%x\n",
2133 wow_triggers_enabled);
2135 ath9k_ps_wakeup(sc);
2137 ath9k_stop_btcoex(sc);
2140 * Enable wake up on recieving disassoc/deauth
2143 ath9k_wow_add_disassoc_deauth_pattern(sc);
2145 if (wow_triggers_enabled & AH_WOW_USER_PATTERN_EN)
2146 ath9k_wow_add_pattern(sc, wowlan);
2148 spin_lock_bh(&sc->sc_pcu_lock);
2150 * To avoid false wake, we enable beacon miss interrupt only
2151 * when we go to sleep. We save the current interrupt mask
2152 * so we can restore it after the system wakes up
2154 sc->wow_intr_before_sleep = ah->imask;
2155 ah->imask &= ~ATH9K_INT_GLOBAL;
2156 ath9k_hw_disable_interrupts(ah);
2157 ah->imask = ATH9K_INT_BMISS | ATH9K_INT_GLOBAL;
2158 ath9k_hw_set_interrupts(ah);
2159 ath9k_hw_enable_interrupts(ah);
2161 spin_unlock_bh(&sc->sc_pcu_lock);
2164 * we can now sync irq and kill any running tasklets, since we already
2165 * disabled interrupts and not holding a spin lock
2167 synchronize_irq(sc->irq);
2168 tasklet_kill(&sc->intr_tq);
2170 ath9k_hw_wow_enable(ah, wow_triggers_enabled);
2172 ath9k_ps_restore(sc);
2173 ath_dbg(common, ANY, "WoW enabled in ath9k\n");
2174 atomic_inc(&sc->wow_sleep_proc_intr);
2177 mutex_unlock(&sc->mutex);
2181 static int ath9k_resume(struct ieee80211_hw *hw)
2183 struct ath_softc *sc = hw->priv;
2184 struct ath_hw *ah = sc->sc_ah;
2185 struct ath_common *common = ath9k_hw_common(ah);
2188 mutex_lock(&sc->mutex);
2190 ath9k_ps_wakeup(sc);
2192 spin_lock_bh(&sc->sc_pcu_lock);
2194 ath9k_hw_disable_interrupts(ah);
2195 ah->imask = sc->wow_intr_before_sleep;
2196 ath9k_hw_set_interrupts(ah);
2197 ath9k_hw_enable_interrupts(ah);
2199 spin_unlock_bh(&sc->sc_pcu_lock);
2201 wow_status = ath9k_hw_wow_wakeup(ah);
2203 if (atomic_read(&sc->wow_got_bmiss_intr) == 0) {
2205 * some devices may not pick beacon miss
2206 * as the reason they woke up so we add
2207 * that here for that shortcoming.
2209 wow_status |= AH_WOW_BEACON_MISS;
2210 atomic_dec(&sc->wow_got_bmiss_intr);
2211 ath_dbg(common, ANY, "Beacon miss interrupt picked up during WoW sleep\n");
2214 atomic_dec(&sc->wow_sleep_proc_intr);
2217 ath_dbg(common, ANY, "Waking up due to WoW triggers %s with WoW status = %x\n",
2218 ath9k_hw_wow_event_to_string(wow_status), wow_status);
2221 ath_restart_work(sc);
2222 ath9k_start_btcoex(sc);
2224 ath9k_ps_restore(sc);
2225 mutex_unlock(&sc->mutex);
2230 static void ath9k_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2232 struct ath_softc *sc = hw->priv;
2234 mutex_lock(&sc->mutex);
2235 device_init_wakeup(sc->dev, 1);
2236 device_set_wakeup_enable(sc->dev, enabled);
2237 mutex_unlock(&sc->mutex);
2242 struct ieee80211_ops ath9k_ops = {
2244 .start = ath9k_start,
2246 .add_interface = ath9k_add_interface,
2247 .change_interface = ath9k_change_interface,
2248 .remove_interface = ath9k_remove_interface,
2249 .config = ath9k_config,
2250 .configure_filter = ath9k_configure_filter,
2251 .sta_add = ath9k_sta_add,
2252 .sta_remove = ath9k_sta_remove,
2253 .sta_notify = ath9k_sta_notify,
2254 .conf_tx = ath9k_conf_tx,
2255 .bss_info_changed = ath9k_bss_info_changed,
2256 .set_key = ath9k_set_key,
2257 .get_tsf = ath9k_get_tsf,
2258 .set_tsf = ath9k_set_tsf,
2259 .reset_tsf = ath9k_reset_tsf,
2260 .ampdu_action = ath9k_ampdu_action,
2261 .get_survey = ath9k_get_survey,
2262 .rfkill_poll = ath9k_rfkill_poll_state,
2263 .set_coverage_class = ath9k_set_coverage_class,
2264 .flush = ath9k_flush,
2265 .tx_frames_pending = ath9k_tx_frames_pending,
2266 .tx_last_beacon = ath9k_tx_last_beacon,
2267 .get_stats = ath9k_get_stats,
2268 .set_antenna = ath9k_set_antenna,
2269 .get_antenna = ath9k_get_antenna,
2271 #ifdef CONFIG_PM_SLEEP
2272 .suspend = ath9k_suspend,
2273 .resume = ath9k_resume,
2274 .set_wakeup = ath9k_set_wakeup,
2277 #ifdef CONFIG_ATH9K_DEBUGFS
2278 .get_et_sset_count = ath9k_get_et_sset_count,
2279 .get_et_stats = ath9k_get_et_stats,
2280 .get_et_strings = ath9k_get_et_strings,
2283 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_DEBUGFS)
2284 .sta_add_debugfs = ath9k_sta_add_debugfs,
2285 .sta_remove_debugfs = ath9k_sta_remove_debugfs,