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)
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 tasklet_disable(&sc->intr_tq);
201 if (!ath_stoprecv(sc))
204 if (!ath_drain_all_txq(sc, retry_tx))
207 tasklet_enable(&sc->intr_tq);
212 static bool ath_complete_reset(struct ath_softc *sc, bool start)
214 struct ath_hw *ah = sc->sc_ah;
215 struct ath_common *common = ath9k_hw_common(ah);
218 if (ath_startrecv(sc) != 0) {
219 ath_err(common, "Unable to restart recv logic\n");
223 ath9k_cmn_update_txpow(ah, sc->curtxpow,
224 sc->config.txpowlimit, &sc->curtxpow);
226 clear_bit(SC_OP_HW_RESET, &sc->sc_flags);
227 ath9k_hw_set_interrupts(ah);
228 ath9k_hw_enable_interrupts(ah);
230 if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) {
231 if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
234 ath9k_set_beacon(sc);
236 if (ah->opmode == NL80211_IFTYPE_STATION &&
237 test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
238 spin_lock_irqsave(&sc->sc_pm_lock, flags);
239 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
240 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
243 ath_restart_work(sc);
246 if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3)
247 ath_ant_comb_update(sc);
249 ieee80211_wake_queues(sc->hw);
254 static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
257 struct ath_hw *ah = sc->sc_ah;
258 struct ath_common *common = ath9k_hw_common(ah);
259 struct ath9k_hw_cal_data *caldata = NULL;
263 __ath_cancel_work(sc);
265 spin_lock_bh(&sc->sc_pcu_lock);
267 if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
269 caldata = &sc->caldata;
277 if (!ath_prepare_reset(sc, retry_tx))
280 ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
281 hchan->channel, IS_CHAN_HT40(hchan), fastcc);
283 r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
286 "Unable to reset channel, reset status %d\n", r);
290 if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
291 (sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL))
292 ath9k_mci_set_txpower(sc, true, false);
294 if (!ath_complete_reset(sc, true))
298 spin_unlock_bh(&sc->sc_pcu_lock);
304 * Set/change channels. If the channel is really being changed, it's done
305 * by reseting the chip. To accomplish this we must first cleanup any pending
306 * DMA, then restart stuff.
308 static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
309 struct ath9k_channel *hchan)
313 if (test_bit(SC_OP_INVALID, &sc->sc_flags))
316 r = ath_reset_internal(sc, hchan, false);
321 static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
322 struct ieee80211_vif *vif)
326 an = (struct ath_node *)sta->drv_priv;
332 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
333 ath_tx_node_init(sc, an);
334 an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
335 sta->ht_cap.ampdu_factor);
336 density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density);
337 an->mpdudensity = density;
341 static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
343 struct ath_node *an = (struct ath_node *)sta->drv_priv;
345 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
346 ath_tx_node_cleanup(sc, an);
349 void ath9k_tasklet(unsigned long data)
351 struct ath_softc *sc = (struct ath_softc *)data;
352 struct ath_hw *ah = sc->sc_ah;
353 struct ath_common *common = ath9k_hw_common(ah);
354 enum ath_reset_type type;
356 u32 status = sc->intrstatus;
360 spin_lock(&sc->sc_pcu_lock);
362 if ((status & ATH9K_INT_FATAL) ||
363 (status & ATH9K_INT_BB_WATCHDOG)) {
365 if (status & ATH9K_INT_FATAL)
366 type = RESET_TYPE_FATAL_INT;
368 type = RESET_TYPE_BB_WATCHDOG;
370 ath9k_queue_reset(sc, type);
374 spin_lock_irqsave(&sc->sc_pm_lock, flags);
375 if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
377 * TSF sync does not look correct; remain awake to sync with
380 ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
381 sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
383 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
385 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
386 rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
389 rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
391 if (status & rxmask) {
392 /* Check for high priority Rx first */
393 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
394 (status & ATH9K_INT_RXHP))
395 ath_rx_tasklet(sc, 0, true);
397 ath_rx_tasklet(sc, 0, false);
400 if (status & ATH9K_INT_TX) {
401 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
402 ath_tx_edma_tasklet(sc);
407 ath9k_btcoex_handle_interrupt(sc, status);
410 /* re-enable hardware interrupt */
411 ath9k_hw_enable_interrupts(ah);
413 spin_unlock(&sc->sc_pcu_lock);
414 ath9k_ps_restore(sc);
417 irqreturn_t ath_isr(int irq, void *dev)
419 #define SCHED_INTR ( \
421 ATH9K_INT_BB_WATCHDOG | \
431 ATH9K_INT_GENTIMER | \
434 struct ath_softc *sc = dev;
435 struct ath_hw *ah = sc->sc_ah;
436 struct ath_common *common = ath9k_hw_common(ah);
437 enum ath9k_int status;
441 * The hardware is not ready/present, don't
442 * touch anything. Note this can happen early
443 * on if the IRQ is shared.
445 if (test_bit(SC_OP_INVALID, &sc->sc_flags))
448 /* shared irq, not for us */
450 if (!ath9k_hw_intrpend(ah))
453 if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) {
454 ath9k_hw_kill_interrupts(ah);
459 * Figure out the reason(s) for the interrupt. Note
460 * that the hal returns a pseudo-ISR that may include
461 * bits we haven't explicitly enabled so we mask the
462 * value to insure we only process bits we requested.
464 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
465 status &= ah->imask; /* discard unasked-for bits */
468 * If there are no status bits set, then this interrupt was not
469 * for me (should have been caught above).
474 /* Cache the status */
475 sc->intrstatus = status;
477 if (status & SCHED_INTR)
481 * If a FATAL or RXORN interrupt is received, we have to reset the
484 if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
485 !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
488 if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
489 (status & ATH9K_INT_BB_WATCHDOG)) {
491 spin_lock(&common->cc_lock);
492 ath_hw_cycle_counters_update(common);
493 ar9003_hw_bb_watchdog_dbg_info(ah);
494 spin_unlock(&common->cc_lock);
498 #ifdef CONFIG_PM_SLEEP
499 if (status & ATH9K_INT_BMISS) {
500 if (atomic_read(&sc->wow_sleep_proc_intr) == 0) {
501 ath_dbg(common, ANY, "during WoW we got a BMISS\n");
502 atomic_inc(&sc->wow_got_bmiss_intr);
503 atomic_dec(&sc->wow_sleep_proc_intr);
507 if (status & ATH9K_INT_SWBA)
508 tasklet_schedule(&sc->bcon_tasklet);
510 if (status & ATH9K_INT_TXURN)
511 ath9k_hw_updatetxtriglevel(ah, true);
513 if (status & ATH9K_INT_RXEOL) {
514 ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
515 ath9k_hw_set_interrupts(ah);
518 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
519 if (status & ATH9K_INT_TIM_TIMER) {
520 if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
522 /* Clear RxAbort bit so that we can
524 ath9k_setpower(sc, ATH9K_PM_AWAKE);
525 spin_lock(&sc->sc_pm_lock);
526 ath9k_hw_setrxabort(sc->sc_ah, 0);
527 sc->ps_flags |= PS_WAIT_FOR_BEACON;
528 spin_unlock(&sc->sc_pm_lock);
533 ath_debug_stat_interrupt(sc, status);
536 /* turn off every interrupt */
537 ath9k_hw_disable_interrupts(ah);
538 tasklet_schedule(&sc->intr_tq);
546 static int ath_reset(struct ath_softc *sc, bool retry_tx)
552 r = ath_reset_internal(sc, NULL, retry_tx);
556 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
557 if (ATH_TXQ_SETUP(sc, i)) {
558 spin_lock_bh(&sc->tx.txq[i].axq_lock);
559 ath_txq_schedule(sc, &sc->tx.txq[i]);
560 spin_unlock_bh(&sc->tx.txq[i].axq_lock);
565 ath9k_ps_restore(sc);
570 void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
572 #ifdef CONFIG_ATH9K_DEBUGFS
573 RESET_STAT_INC(sc, type);
575 set_bit(SC_OP_HW_RESET, &sc->sc_flags);
576 ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
579 void ath_reset_work(struct work_struct *work)
581 struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
586 /**********************/
587 /* mac80211 callbacks */
588 /**********************/
590 static int ath9k_start(struct ieee80211_hw *hw)
592 struct ath_softc *sc = hw->priv;
593 struct ath_hw *ah = sc->sc_ah;
594 struct ath_common *common = ath9k_hw_common(ah);
595 struct ieee80211_channel *curchan = hw->conf.channel;
596 struct ath9k_channel *init_channel;
599 ath_dbg(common, CONFIG,
600 "Starting driver with initial channel: %d MHz\n",
601 curchan->center_freq);
604 mutex_lock(&sc->mutex);
606 init_channel = ath9k_cmn_get_curchannel(hw, ah);
608 /* Reset SERDES registers */
609 ath9k_hw_configpcipowersave(ah, false);
612 * The basic interface to setting the hardware in a good
613 * state is ``reset''. On return the hardware is known to
614 * be powered up and with interrupts disabled. This must
615 * be followed by initialization of the appropriate bits
616 * and then setup of the interrupt mask.
618 spin_lock_bh(&sc->sc_pcu_lock);
620 atomic_set(&ah->intr_ref_cnt, -1);
622 r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
625 "Unable to reset hardware; reset status %d (freq %u MHz)\n",
626 r, curchan->center_freq);
627 ah->reset_power_on = false;
630 /* Setup our intr mask. */
631 ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
632 ATH9K_INT_RXORN | ATH9K_INT_FATAL |
635 if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
636 ah->imask |= ATH9K_INT_RXHP |
638 ATH9K_INT_BB_WATCHDOG;
640 ah->imask |= ATH9K_INT_RX;
642 ah->imask |= ATH9K_INT_GTT;
644 if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
645 ah->imask |= ATH9K_INT_CST;
649 clear_bit(SC_OP_INVALID, &sc->sc_flags);
650 sc->sc_ah->is_monitoring = false;
652 if (!ath_complete_reset(sc, false))
653 ah->reset_power_on = false;
655 if (ah->led_pin >= 0) {
656 ath9k_hw_cfg_output(ah, ah->led_pin,
657 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
658 ath9k_hw_set_gpio(ah, ah->led_pin, 0);
662 * Reset key cache to sane defaults (all entries cleared) instead of
663 * semi-random values after suspend/resume.
665 ath9k_cmn_init_crypto(sc->sc_ah);
667 spin_unlock_bh(&sc->sc_pcu_lock);
669 mutex_unlock(&sc->mutex);
671 ath9k_ps_restore(sc);
676 static void ath9k_tx(struct ieee80211_hw *hw,
677 struct ieee80211_tx_control *control,
680 struct ath_softc *sc = hw->priv;
681 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
682 struct ath_tx_control txctl;
683 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
686 if (sc->ps_enabled) {
688 * mac80211 does not set PM field for normal data frames, so we
689 * need to update that based on the current PS mode.
691 if (ieee80211_is_data(hdr->frame_control) &&
692 !ieee80211_is_nullfunc(hdr->frame_control) &&
693 !ieee80211_has_pm(hdr->frame_control)) {
695 "Add PM=1 for a TX frame while in PS mode\n");
696 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
700 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
702 * We are using PS-Poll and mac80211 can request TX while in
703 * power save mode. Need to wake up hardware for the TX to be
704 * completed and if needed, also for RX of buffered frames.
707 spin_lock_irqsave(&sc->sc_pm_lock, flags);
708 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
709 ath9k_hw_setrxabort(sc->sc_ah, 0);
710 if (ieee80211_is_pspoll(hdr->frame_control)) {
712 "Sending PS-Poll to pick a buffered frame\n");
713 sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
715 ath_dbg(common, PS, "Wake up to complete TX\n");
716 sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
719 * The actual restore operation will happen only after
720 * the ps_flags bit is cleared. We are just dropping
721 * the ps_usecount here.
723 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
724 ath9k_ps_restore(sc);
728 * Cannot tx while the hardware is in full sleep, it first needs a full
729 * chip reset to recover from that
731 if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
732 ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
736 memset(&txctl, 0, sizeof(struct ath_tx_control));
737 txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
738 txctl.sta = control->sta;
740 ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
742 if (ath_tx_start(hw, skb, &txctl) != 0) {
743 ath_dbg(common, XMIT, "TX failed\n");
744 TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
750 ieee80211_free_txskb(hw, skb);
753 static void ath9k_stop(struct ieee80211_hw *hw)
755 struct ath_softc *sc = hw->priv;
756 struct ath_hw *ah = sc->sc_ah;
757 struct ath_common *common = ath9k_hw_common(ah);
760 mutex_lock(&sc->mutex);
763 del_timer_sync(&sc->rx_poll_timer);
765 if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
766 ath_dbg(common, ANY, "Device not present\n");
767 mutex_unlock(&sc->mutex);
771 /* Ensure HW is awake when we try to shut it down. */
774 spin_lock_bh(&sc->sc_pcu_lock);
776 /* prevent tasklets to enable interrupts once we disable them */
777 ah->imask &= ~ATH9K_INT_GLOBAL;
779 /* make sure h/w will not generate any interrupt
780 * before setting the invalid flag. */
781 ath9k_hw_disable_interrupts(ah);
783 spin_unlock_bh(&sc->sc_pcu_lock);
785 /* we can now sync irq and kill any running tasklets, since we already
786 * disabled interrupts and not holding a spin lock */
787 synchronize_irq(sc->irq);
788 tasklet_kill(&sc->intr_tq);
789 tasklet_kill(&sc->bcon_tasklet);
791 prev_idle = sc->ps_idle;
794 spin_lock_bh(&sc->sc_pcu_lock);
796 if (ah->led_pin >= 0) {
797 ath9k_hw_set_gpio(ah, ah->led_pin, 1);
798 ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
801 ath_prepare_reset(sc, false);
804 dev_kfree_skb_any(sc->rx.frag);
809 ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
811 ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
812 ath9k_hw_phy_disable(ah);
814 ath9k_hw_configpcipowersave(ah, true);
816 spin_unlock_bh(&sc->sc_pcu_lock);
818 ath9k_ps_restore(sc);
820 set_bit(SC_OP_INVALID, &sc->sc_flags);
821 sc->ps_idle = prev_idle;
823 mutex_unlock(&sc->mutex);
825 ath_dbg(common, CONFIG, "Driver halt\n");
828 bool ath9k_uses_beacons(int type)
831 case NL80211_IFTYPE_AP:
832 case NL80211_IFTYPE_ADHOC:
833 case NL80211_IFTYPE_MESH_POINT:
840 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
842 struct ath9k_vif_iter_data *iter_data = data;
845 if (iter_data->hw_macaddr)
846 for (i = 0; i < ETH_ALEN; i++)
847 iter_data->mask[i] &=
848 ~(iter_data->hw_macaddr[i] ^ mac[i]);
851 case NL80211_IFTYPE_AP:
854 case NL80211_IFTYPE_STATION:
855 iter_data->nstations++;
857 case NL80211_IFTYPE_ADHOC:
858 iter_data->nadhocs++;
860 case NL80211_IFTYPE_MESH_POINT:
861 iter_data->nmeshes++;
863 case NL80211_IFTYPE_WDS:
871 static void ath9k_sta_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
873 struct ath_softc *sc = data;
874 struct ath_vif *avp = (void *)vif->drv_priv;
876 if (vif->type != NL80211_IFTYPE_STATION)
879 if (avp->primary_sta_vif)
880 ath9k_set_assoc_state(sc, vif);
883 /* Called with sc->mutex held. */
884 void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
885 struct ieee80211_vif *vif,
886 struct ath9k_vif_iter_data *iter_data)
888 struct ath_softc *sc = hw->priv;
889 struct ath_hw *ah = sc->sc_ah;
890 struct ath_common *common = ath9k_hw_common(ah);
893 * Use the hardware MAC address as reference, the hardware uses it
894 * together with the BSSID mask when matching addresses.
896 memset(iter_data, 0, sizeof(*iter_data));
897 iter_data->hw_macaddr = common->macaddr;
898 memset(&iter_data->mask, 0xff, ETH_ALEN);
901 ath9k_vif_iter(iter_data, vif->addr, vif);
903 /* Get list of all active MAC addresses */
904 ieee80211_iterate_active_interfaces_atomic(
905 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
906 ath9k_vif_iter, iter_data);
909 /* Called with sc->mutex held. */
910 static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
911 struct ieee80211_vif *vif)
913 struct ath_softc *sc = hw->priv;
914 struct ath_hw *ah = sc->sc_ah;
915 struct ath_common *common = ath9k_hw_common(ah);
916 struct ath9k_vif_iter_data iter_data;
917 enum nl80211_iftype old_opmode = ah->opmode;
919 ath9k_calculate_iter_data(hw, vif, &iter_data);
921 memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
922 ath_hw_setbssidmask(common);
924 if (iter_data.naps > 0) {
925 ath9k_hw_set_tsfadjust(ah, true);
926 ah->opmode = NL80211_IFTYPE_AP;
928 ath9k_hw_set_tsfadjust(ah, false);
930 if (iter_data.nmeshes)
931 ah->opmode = NL80211_IFTYPE_MESH_POINT;
932 else if (iter_data.nwds)
933 ah->opmode = NL80211_IFTYPE_AP;
934 else if (iter_data.nadhocs)
935 ah->opmode = NL80211_IFTYPE_ADHOC;
937 ah->opmode = NL80211_IFTYPE_STATION;
940 ath9k_hw_setopmode(ah);
942 if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
943 ah->imask |= ATH9K_INT_TSFOOR;
945 ah->imask &= ~ATH9K_INT_TSFOOR;
947 ath9k_hw_set_interrupts(ah);
950 * If we are changing the opmode to STATION,
951 * a beacon sync needs to be done.
953 if (ah->opmode == NL80211_IFTYPE_STATION &&
954 old_opmode == NL80211_IFTYPE_AP &&
955 test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
956 ieee80211_iterate_active_interfaces_atomic(
957 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
958 ath9k_sta_vif_iter, sc);
962 static int ath9k_add_interface(struct ieee80211_hw *hw,
963 struct ieee80211_vif *vif)
965 struct ath_softc *sc = hw->priv;
966 struct ath_hw *ah = sc->sc_ah;
967 struct ath_common *common = ath9k_hw_common(ah);
969 mutex_lock(&sc->mutex);
971 ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
975 ath9k_calculate_summary_state(hw, vif);
976 ath9k_ps_restore(sc);
978 if (ath9k_uses_beacons(vif->type))
979 ath9k_beacon_assign_slot(sc, vif);
981 mutex_unlock(&sc->mutex);
985 static int ath9k_change_interface(struct ieee80211_hw *hw,
986 struct ieee80211_vif *vif,
987 enum nl80211_iftype new_type,
990 struct ath_softc *sc = hw->priv;
991 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
993 ath_dbg(common, CONFIG, "Change Interface\n");
994 mutex_lock(&sc->mutex);
996 if (ath9k_uses_beacons(vif->type))
997 ath9k_beacon_remove_slot(sc, vif);
999 vif->type = new_type;
1002 ath9k_ps_wakeup(sc);
1003 ath9k_calculate_summary_state(hw, vif);
1004 ath9k_ps_restore(sc);
1006 if (ath9k_uses_beacons(vif->type))
1007 ath9k_beacon_assign_slot(sc, vif);
1009 mutex_unlock(&sc->mutex);
1013 static void ath9k_remove_interface(struct ieee80211_hw *hw,
1014 struct ieee80211_vif *vif)
1016 struct ath_softc *sc = hw->priv;
1017 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1019 ath_dbg(common, CONFIG, "Detach Interface\n");
1021 mutex_lock(&sc->mutex);
1025 if (ath9k_uses_beacons(vif->type))
1026 ath9k_beacon_remove_slot(sc, vif);
1028 ath9k_ps_wakeup(sc);
1029 ath9k_calculate_summary_state(hw, NULL);
1030 ath9k_ps_restore(sc);
1032 mutex_unlock(&sc->mutex);
1035 static void ath9k_enable_ps(struct ath_softc *sc)
1037 struct ath_hw *ah = sc->sc_ah;
1038 struct ath_common *common = ath9k_hw_common(ah);
1040 sc->ps_enabled = true;
1041 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1042 if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
1043 ah->imask |= ATH9K_INT_TIM_TIMER;
1044 ath9k_hw_set_interrupts(ah);
1046 ath9k_hw_setrxabort(ah, 1);
1048 ath_dbg(common, PS, "PowerSave enabled\n");
1051 static void ath9k_disable_ps(struct ath_softc *sc)
1053 struct ath_hw *ah = sc->sc_ah;
1054 struct ath_common *common = ath9k_hw_common(ah);
1056 sc->ps_enabled = false;
1057 ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
1058 if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
1059 ath9k_hw_setrxabort(ah, 0);
1060 sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
1062 PS_WAIT_FOR_PSPOLL_DATA |
1063 PS_WAIT_FOR_TX_ACK);
1064 if (ah->imask & ATH9K_INT_TIM_TIMER) {
1065 ah->imask &= ~ATH9K_INT_TIM_TIMER;
1066 ath9k_hw_set_interrupts(ah);
1069 ath_dbg(common, PS, "PowerSave disabled\n");
1072 static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1074 struct ath_softc *sc = hw->priv;
1075 struct ath_hw *ah = sc->sc_ah;
1076 struct ath_common *common = ath9k_hw_common(ah);
1077 struct ieee80211_conf *conf = &hw->conf;
1078 bool reset_channel = false;
1080 ath9k_ps_wakeup(sc);
1081 mutex_lock(&sc->mutex);
1083 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1084 sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1086 ath_cancel_work(sc);
1087 ath9k_stop_btcoex(sc);
1089 ath9k_start_btcoex(sc);
1091 * The chip needs a reset to properly wake up from
1094 reset_channel = ah->chip_fullsleep;
1099 * We just prepare to enable PS. We have to wait until our AP has
1100 * ACK'd our null data frame to disable RX otherwise we'll ignore
1101 * those ACKs and end up retransmitting the same null data frames.
1102 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
1104 if (changed & IEEE80211_CONF_CHANGE_PS) {
1105 unsigned long flags;
1106 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1107 if (conf->flags & IEEE80211_CONF_PS)
1108 ath9k_enable_ps(sc);
1110 ath9k_disable_ps(sc);
1111 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1114 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
1115 if (conf->flags & IEEE80211_CONF_MONITOR) {
1116 ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1117 sc->sc_ah->is_monitoring = true;
1119 ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1120 sc->sc_ah->is_monitoring = false;
1124 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
1125 struct ieee80211_channel *curchan = hw->conf.channel;
1126 int pos = curchan->hw_value;
1128 unsigned long flags;
1131 old_pos = ah->curchan - &ah->channels[0];
1133 ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
1134 curchan->center_freq, conf->channel_type);
1136 /* update survey stats for the old channel before switching */
1137 spin_lock_irqsave(&common->cc_lock, flags);
1138 ath_update_survey_stats(sc);
1139 spin_unlock_irqrestore(&common->cc_lock, flags);
1142 * Preserve the current channel values, before updating
1145 if (ah->curchan && (old_pos == pos))
1146 ath9k_hw_getnf(ah, ah->curchan);
1148 ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
1149 curchan, conf->channel_type);
1152 * If the operating channel changes, change the survey in-use flags
1154 * Reset the survey data for the new channel, unless we're switching
1155 * back to the operating channel from an off-channel operation.
1157 if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
1158 sc->cur_survey != &sc->survey[pos]) {
1161 sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
1163 sc->cur_survey = &sc->survey[pos];
1165 memset(sc->cur_survey, 0, sizeof(struct survey_info));
1166 sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
1167 } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
1168 memset(&sc->survey[pos], 0, sizeof(struct survey_info));
1171 if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1172 ath_err(common, "Unable to set channel\n");
1173 mutex_unlock(&sc->mutex);
1174 ath9k_ps_restore(sc);
1179 * The most recent snapshot of channel->noisefloor for the old
1180 * channel is only available after the hardware reset. Copy it to
1181 * the survey stats now.
1184 ath_update_survey_nf(sc, old_pos);
1187 if (changed & IEEE80211_CONF_CHANGE_POWER) {
1188 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
1189 sc->config.txpowlimit = 2 * conf->power_level;
1190 ath9k_cmn_update_txpow(ah, sc->curtxpow,
1191 sc->config.txpowlimit, &sc->curtxpow);
1194 mutex_unlock(&sc->mutex);
1195 ath9k_ps_restore(sc);
1200 #define SUPPORTED_FILTERS \
1201 (FIF_PROMISC_IN_BSS | \
1206 FIF_BCN_PRBRESP_PROMISC | \
1210 /* FIXME: sc->sc_full_reset ? */
1211 static void ath9k_configure_filter(struct ieee80211_hw *hw,
1212 unsigned int changed_flags,
1213 unsigned int *total_flags,
1216 struct ath_softc *sc = hw->priv;
1219 changed_flags &= SUPPORTED_FILTERS;
1220 *total_flags &= SUPPORTED_FILTERS;
1222 sc->rx.rxfilter = *total_flags;
1223 ath9k_ps_wakeup(sc);
1224 rfilt = ath_calcrxfilter(sc);
1225 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1226 ath9k_ps_restore(sc);
1228 ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
1232 static int ath9k_sta_add(struct ieee80211_hw *hw,
1233 struct ieee80211_vif *vif,
1234 struct ieee80211_sta *sta)
1236 struct ath_softc *sc = hw->priv;
1237 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1238 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1239 struct ieee80211_key_conf ps_key = { };
1241 ath_node_attach(sc, sta, vif);
1243 if (vif->type != NL80211_IFTYPE_AP &&
1244 vif->type != NL80211_IFTYPE_AP_VLAN)
1247 an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1252 static void ath9k_del_ps_key(struct ath_softc *sc,
1253 struct ieee80211_vif *vif,
1254 struct ieee80211_sta *sta)
1256 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1257 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1258 struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
1263 ath_key_delete(common, &ps_key);
1266 static int ath9k_sta_remove(struct ieee80211_hw *hw,
1267 struct ieee80211_vif *vif,
1268 struct ieee80211_sta *sta)
1270 struct ath_softc *sc = hw->priv;
1272 ath9k_del_ps_key(sc, vif, sta);
1273 ath_node_detach(sc, sta);
1278 static void ath9k_sta_notify(struct ieee80211_hw *hw,
1279 struct ieee80211_vif *vif,
1280 enum sta_notify_cmd cmd,
1281 struct ieee80211_sta *sta)
1283 struct ath_softc *sc = hw->priv;
1284 struct ath_node *an = (struct ath_node *) sta->drv_priv;
1286 if (!sta->ht_cap.ht_supported)
1290 case STA_NOTIFY_SLEEP:
1291 an->sleeping = true;
1292 ath_tx_aggr_sleep(sta, sc, an);
1294 case STA_NOTIFY_AWAKE:
1295 an->sleeping = false;
1296 ath_tx_aggr_wakeup(sc, an);
1301 static int ath9k_conf_tx(struct ieee80211_hw *hw,
1302 struct ieee80211_vif *vif, u16 queue,
1303 const struct ieee80211_tx_queue_params *params)
1305 struct ath_softc *sc = hw->priv;
1306 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1307 struct ath_txq *txq;
1308 struct ath9k_tx_queue_info qi;
1311 if (queue >= IEEE80211_NUM_ACS)
1314 txq = sc->tx.txq_map[queue];
1316 ath9k_ps_wakeup(sc);
1317 mutex_lock(&sc->mutex);
1319 memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
1321 qi.tqi_aifs = params->aifs;
1322 qi.tqi_cwmin = params->cw_min;
1323 qi.tqi_cwmax = params->cw_max;
1324 qi.tqi_burstTime = params->txop * 32;
1326 ath_dbg(common, CONFIG,
1327 "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
1328 queue, txq->axq_qnum, params->aifs, params->cw_min,
1329 params->cw_max, params->txop);
1331 ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1332 ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1334 ath_err(common, "TXQ Update failed\n");
1336 mutex_unlock(&sc->mutex);
1337 ath9k_ps_restore(sc);
1342 static int ath9k_set_key(struct ieee80211_hw *hw,
1343 enum set_key_cmd cmd,
1344 struct ieee80211_vif *vif,
1345 struct ieee80211_sta *sta,
1346 struct ieee80211_key_conf *key)
1348 struct ath_softc *sc = hw->priv;
1349 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1352 if (ath9k_modparam_nohwcrypt)
1355 if ((vif->type == NL80211_IFTYPE_ADHOC ||
1356 vif->type == NL80211_IFTYPE_MESH_POINT) &&
1357 (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
1358 key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
1359 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1361 * For now, disable hw crypto for the RSN IBSS group keys. This
1362 * could be optimized in the future to use a modified key cache
1363 * design to support per-STA RX GTK, but until that gets
1364 * implemented, use of software crypto for group addressed
1365 * frames is a acceptable to allow RSN IBSS to be used.
1370 mutex_lock(&sc->mutex);
1371 ath9k_ps_wakeup(sc);
1372 ath_dbg(common, CONFIG, "Set HW Key\n");
1377 ath9k_del_ps_key(sc, vif, sta);
1379 ret = ath_key_config(common, vif, sta, key);
1381 key->hw_key_idx = ret;
1382 /* push IV and Michael MIC generation to stack */
1383 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1384 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1385 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1386 if (sc->sc_ah->sw_mgmt_crypto &&
1387 key->cipher == WLAN_CIPHER_SUITE_CCMP)
1388 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1393 ath_key_delete(common, key);
1399 ath9k_ps_restore(sc);
1400 mutex_unlock(&sc->mutex);
1405 static void ath9k_set_assoc_state(struct ath_softc *sc,
1406 struct ieee80211_vif *vif)
1408 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1409 struct ath_vif *avp = (void *)vif->drv_priv;
1410 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1411 unsigned long flags;
1413 set_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
1414 avp->primary_sta_vif = true;
1417 * Set the AID, BSSID and do beacon-sync only when
1418 * the HW opmode is STATION.
1420 * But the primary bit is set above in any case.
1422 if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1425 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1426 common->curaid = bss_conf->aid;
1427 ath9k_hw_write_associd(sc->sc_ah);
1429 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
1430 sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1432 spin_lock_irqsave(&sc->sc_pm_lock, flags);
1433 sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
1434 spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1436 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1437 ath9k_mci_update_wlan_channels(sc, false);
1439 ath_dbg(common, CONFIG,
1440 "Primary Station interface: %pM, BSSID: %pM\n",
1441 vif->addr, common->curbssid);
1444 static void ath9k_bss_assoc_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1446 struct ath_softc *sc = data;
1447 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
1449 if (test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags))
1452 if (bss_conf->assoc)
1453 ath9k_set_assoc_state(sc, vif);
1456 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
1457 struct ieee80211_vif *vif,
1458 struct ieee80211_bss_conf *bss_conf,
1462 (BSS_CHANGED_ASSOC | \
1463 BSS_CHANGED_IBSS | \
1464 BSS_CHANGED_BEACON_ENABLED)
1466 struct ath_softc *sc = hw->priv;
1467 struct ath_hw *ah = sc->sc_ah;
1468 struct ath_common *common = ath9k_hw_common(ah);
1469 struct ath_vif *avp = (void *)vif->drv_priv;
1472 ath9k_ps_wakeup(sc);
1473 mutex_lock(&sc->mutex);
1475 if (changed & BSS_CHANGED_ASSOC) {
1476 ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
1477 bss_conf->bssid, bss_conf->assoc);
1479 if (avp->primary_sta_vif && !bss_conf->assoc) {
1480 clear_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
1481 avp->primary_sta_vif = false;
1483 if (ah->opmode == NL80211_IFTYPE_STATION)
1484 clear_bit(SC_OP_BEACONS, &sc->sc_flags);
1487 ieee80211_iterate_active_interfaces_atomic(
1488 sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1489 ath9k_bss_assoc_iter, sc);
1491 if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags) &&
1492 ah->opmode == NL80211_IFTYPE_STATION) {
1493 memset(common->curbssid, 0, ETH_ALEN);
1495 ath9k_hw_write_associd(sc->sc_ah);
1496 if (ath9k_hw_mci_is_enabled(sc->sc_ah))
1497 ath9k_mci_update_wlan_channels(sc, true);
1501 if (changed & BSS_CHANGED_IBSS) {
1502 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1503 common->curaid = bss_conf->aid;
1504 ath9k_hw_write_associd(sc->sc_ah);
1507 if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
1508 (changed & BSS_CHANGED_BEACON_INT)) {
1509 if (ah->opmode == NL80211_IFTYPE_AP &&
1510 bss_conf->enable_beacon)
1511 ath9k_set_tsfadjust(sc, vif);
1512 if (ath9k_allow_beacon_config(sc, vif))
1513 ath9k_beacon_config(sc, vif, changed);
1516 if (changed & BSS_CHANGED_ERP_SLOT) {
1517 if (bss_conf->use_short_slot)
1521 if (vif->type == NL80211_IFTYPE_AP) {
1523 * Defer update, so that connected stations can adjust
1524 * their settings at the same time.
1525 * See beacon.c for more details
1527 sc->beacon.slottime = slottime;
1528 sc->beacon.updateslot = UPDATE;
1530 ah->slottime = slottime;
1531 ath9k_hw_init_global_settings(ah);
1535 if (changed & CHECK_ANI)
1538 mutex_unlock(&sc->mutex);
1539 ath9k_ps_restore(sc);
1544 static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1546 struct ath_softc *sc = hw->priv;
1549 mutex_lock(&sc->mutex);
1550 ath9k_ps_wakeup(sc);
1551 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1552 ath9k_ps_restore(sc);
1553 mutex_unlock(&sc->mutex);
1558 static void ath9k_set_tsf(struct ieee80211_hw *hw,
1559 struct ieee80211_vif *vif,
1562 struct ath_softc *sc = hw->priv;
1564 mutex_lock(&sc->mutex);
1565 ath9k_ps_wakeup(sc);
1566 ath9k_hw_settsf64(sc->sc_ah, tsf);
1567 ath9k_ps_restore(sc);
1568 mutex_unlock(&sc->mutex);
1571 static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1573 struct ath_softc *sc = hw->priv;
1575 mutex_lock(&sc->mutex);
1577 ath9k_ps_wakeup(sc);
1578 ath9k_hw_reset_tsf(sc->sc_ah);
1579 ath9k_ps_restore(sc);
1581 mutex_unlock(&sc->mutex);
1584 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1585 struct ieee80211_vif *vif,
1586 enum ieee80211_ampdu_mlme_action action,
1587 struct ieee80211_sta *sta,
1588 u16 tid, u16 *ssn, u8 buf_size)
1590 struct ath_softc *sc = hw->priv;
1596 case IEEE80211_AMPDU_RX_START:
1598 case IEEE80211_AMPDU_RX_STOP:
1600 case IEEE80211_AMPDU_TX_START:
1601 ath9k_ps_wakeup(sc);
1602 ret = ath_tx_aggr_start(sc, sta, tid, ssn);
1604 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1605 ath9k_ps_restore(sc);
1607 case IEEE80211_AMPDU_TX_STOP:
1608 ath9k_ps_wakeup(sc);
1609 ath_tx_aggr_stop(sc, sta, tid);
1610 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1611 ath9k_ps_restore(sc);
1613 case IEEE80211_AMPDU_TX_OPERATIONAL:
1614 ath9k_ps_wakeup(sc);
1615 ath_tx_aggr_resume(sc, sta, tid);
1616 ath9k_ps_restore(sc);
1619 ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
1627 static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
1628 struct survey_info *survey)
1630 struct ath_softc *sc = hw->priv;
1631 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1632 struct ieee80211_supported_band *sband;
1633 struct ieee80211_channel *chan;
1634 unsigned long flags;
1637 spin_lock_irqsave(&common->cc_lock, flags);
1639 ath_update_survey_stats(sc);
1641 sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
1642 if (sband && idx >= sband->n_channels) {
1643 idx -= sband->n_channels;
1648 sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
1650 if (!sband || idx >= sband->n_channels) {
1651 spin_unlock_irqrestore(&common->cc_lock, flags);
1655 chan = &sband->channels[idx];
1656 pos = chan->hw_value;
1657 memcpy(survey, &sc->survey[pos], sizeof(*survey));
1658 survey->channel = chan;
1659 spin_unlock_irqrestore(&common->cc_lock, flags);
1664 static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
1666 struct ath_softc *sc = hw->priv;
1667 struct ath_hw *ah = sc->sc_ah;
1669 mutex_lock(&sc->mutex);
1670 ah->coverage_class = coverage_class;
1672 ath9k_ps_wakeup(sc);
1673 ath9k_hw_init_global_settings(ah);
1674 ath9k_ps_restore(sc);
1676 mutex_unlock(&sc->mutex);
1679 static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
1681 struct ath_softc *sc = hw->priv;
1682 struct ath_hw *ah = sc->sc_ah;
1683 struct ath_common *common = ath9k_hw_common(ah);
1684 int timeout = 200; /* ms */
1688 mutex_lock(&sc->mutex);
1689 cancel_delayed_work_sync(&sc->tx_complete_work);
1691 if (ah->ah_flags & AH_UNPLUGGED) {
1692 ath_dbg(common, ANY, "Device has been unplugged!\n");
1693 mutex_unlock(&sc->mutex);
1697 if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
1698 ath_dbg(common, ANY, "Device not present\n");
1699 mutex_unlock(&sc->mutex);
1703 for (j = 0; j < timeout; j++) {
1707 usleep_range(1000, 2000);
1709 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1710 if (!ATH_TXQ_SETUP(sc, i))
1713 npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
1724 ath9k_ps_wakeup(sc);
1725 spin_lock_bh(&sc->sc_pcu_lock);
1726 drain_txq = ath_drain_all_txq(sc, false);
1727 spin_unlock_bh(&sc->sc_pcu_lock);
1730 ath_reset(sc, false);
1732 ath9k_ps_restore(sc);
1733 ieee80211_wake_queues(hw);
1736 ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
1737 mutex_unlock(&sc->mutex);
1740 static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
1742 struct ath_softc *sc = hw->priv;
1745 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
1746 if (!ATH_TXQ_SETUP(sc, i))
1749 if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
1755 static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
1757 struct ath_softc *sc = hw->priv;
1758 struct ath_hw *ah = sc->sc_ah;
1759 struct ieee80211_vif *vif;
1760 struct ath_vif *avp;
1762 struct ath_tx_status ts;
1763 bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
1766 vif = sc->beacon.bslot[0];
1770 if (!vif->bss_conf.enable_beacon)
1773 avp = (void *)vif->drv_priv;
1775 if (!sc->beacon.tx_processed && !edma) {
1776 tasklet_disable(&sc->bcon_tasklet);
1779 if (!bf || !bf->bf_mpdu)
1782 status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
1783 if (status == -EINPROGRESS)
1786 sc->beacon.tx_processed = true;
1787 sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
1790 tasklet_enable(&sc->bcon_tasklet);
1793 return sc->beacon.tx_last;
1796 static int ath9k_get_stats(struct ieee80211_hw *hw,
1797 struct ieee80211_low_level_stats *stats)
1799 struct ath_softc *sc = hw->priv;
1800 struct ath_hw *ah = sc->sc_ah;
1801 struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
1803 stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
1804 stats->dot11RTSFailureCount = mib_stats->rts_bad;
1805 stats->dot11FCSErrorCount = mib_stats->fcs_bad;
1806 stats->dot11RTSSuccessCount = mib_stats->rts_good;
1810 static u32 fill_chainmask(u32 cap, u32 new)
1815 for (i = 0; cap && new; i++, cap >>= 1) {
1816 if (!(cap & BIT(0)))
1828 static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
1830 switch (val & 0x7) {
1836 return (ah->caps.rx_chainmask == 1);
1842 static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
1844 struct ath_softc *sc = hw->priv;
1845 struct ath_hw *ah = sc->sc_ah;
1847 if (ah->caps.rx_chainmask != 1)
1850 if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
1853 sc->ant_rx = rx_ant;
1854 sc->ant_tx = tx_ant;
1856 if (ah->caps.rx_chainmask == 1)
1859 /* AR9100 runs into calibration issues if not all rx chains are enabled */
1860 if (AR_SREV_9100(ah))
1861 ah->rxchainmask = 0x7;
1863 ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
1865 ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
1866 ath9k_reload_chainmask_settings(sc);
1871 static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
1873 struct ath_softc *sc = hw->priv;
1875 *tx_ant = sc->ant_tx;
1876 *rx_ant = sc->ant_rx;
1880 #ifdef CONFIG_PM_SLEEP
1882 static void ath9k_wow_map_triggers(struct ath_softc *sc,
1883 struct cfg80211_wowlan *wowlan,
1886 if (wowlan->disconnect)
1887 *wow_triggers |= AH_WOW_LINK_CHANGE |
1889 if (wowlan->magic_pkt)
1890 *wow_triggers |= AH_WOW_MAGIC_PATTERN_EN;
1892 if (wowlan->n_patterns)
1893 *wow_triggers |= AH_WOW_USER_PATTERN_EN;
1895 sc->wow_enabled = *wow_triggers;
1899 static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
1901 struct ath_hw *ah = sc->sc_ah;
1902 struct ath_common *common = ath9k_hw_common(ah);
1903 struct ath9k_hw_capabilities *pcaps = &ah->caps;
1904 int pattern_count = 0;
1906 u8 dis_deauth_pattern[MAX_PATTERN_SIZE];
1907 u8 dis_deauth_mask[MAX_PATTERN_SIZE];
1909 memset(dis_deauth_pattern, 0, MAX_PATTERN_SIZE);
1910 memset(dis_deauth_mask, 0, MAX_PATTERN_SIZE);
1913 * Create Dissassociate / Deauthenticate packet filter
1915 * 2 bytes 2 byte 6 bytes 6 bytes 6 bytes
1916 * +--------------+----------+---------+--------+--------+----
1917 * + Frame Control+ Duration + DA + SA + BSSID +
1918 * +--------------+----------+---------+--------+--------+----
1920 * The above is the management frame format for disassociate/
1921 * deauthenticate pattern, from this we need to match the first byte
1922 * of 'Frame Control' and DA, SA, and BSSID fields
1923 * (skipping 2nd byte of FC and Duration feild.
1925 * Disassociate pattern
1926 * --------------------
1927 * Frame control = 00 00 1010
1928 * DA, SA, BSSID = x:x:x:x:x:x
1929 * Pattern will be A0000000 | x:x:x:x:x:x | x:x:x:x:x:x
1930 * | x:x:x:x:x:x -- 22 bytes
1932 * Deauthenticate pattern
1933 * ----------------------
1934 * Frame control = 00 00 1100
1935 * DA, SA, BSSID = x:x:x:x:x:x
1936 * Pattern will be C0000000 | x:x:x:x:x:x | x:x:x:x:x:x
1937 * | x:x:x:x:x:x -- 22 bytes
1940 /* Create Disassociate Pattern first */
1944 /* Fill out the mask with all FF's */
1946 for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++)
1947 dis_deauth_mask[i] = 0xff;
1949 /* copy the first byte of frame control field */
1950 dis_deauth_pattern[byte_cnt] = 0xa0;
1953 /* skip 2nd byte of frame control and Duration field */
1957 * need not match the destination mac address, it can be a broadcast
1958 * mac address or an unicast to this station
1962 /* copy the source mac address */
1963 memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
1967 /* copy the bssid, its same as the source mac address */
1969 memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
1971 /* Create Disassociate pattern mask */
1973 if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_EXACT) {
1975 if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_DWORD) {
1977 * for AR9280, because of hardware limitation, the
1978 * first 4 bytes have to be matched for all patterns.
1979 * the mask for disassociation and de-auth pattern
1980 * matching need to enable the first 4 bytes.
1981 * also the duration field needs to be filled.
1983 dis_deauth_mask[0] = 0xf0;
1986 * fill in duration field
1987 FIXME: what is the exact value ?
1989 dis_deauth_pattern[2] = 0xff;
1990 dis_deauth_pattern[3] = 0xff;
1992 dis_deauth_mask[0] = 0xfe;
1995 dis_deauth_mask[1] = 0x03;
1996 dis_deauth_mask[2] = 0xc0;
1998 dis_deauth_mask[0] = 0xef;
1999 dis_deauth_mask[1] = 0x3f;
2000 dis_deauth_mask[2] = 0x00;
2001 dis_deauth_mask[3] = 0xfc;
2004 ath_dbg(common, WOW, "Adding disassoc/deauth patterns for WoW\n");
2006 ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
2007 pattern_count, byte_cnt);
2011 * for de-authenticate pattern, only the first byte of the frame
2012 * control field gets changed from 0xA0 to 0xC0
2014 dis_deauth_pattern[0] = 0xC0;
2016 ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
2017 pattern_count, byte_cnt);
2021 static void ath9k_wow_add_pattern(struct ath_softc *sc,
2022 struct cfg80211_wowlan *wowlan)
2024 struct ath_hw *ah = sc->sc_ah;
2025 struct ath9k_wow_pattern *wow_pattern = NULL;
2026 struct cfg80211_wowlan_trig_pkt_pattern *patterns = wowlan->patterns;
2030 if (!wowlan->n_patterns)
2034 * Add the new user configured patterns
2036 for (i = 0; i < wowlan->n_patterns; i++) {
2038 wow_pattern = kzalloc(sizeof(*wow_pattern), GFP_KERNEL);
2044 * TODO: convert the generic user space pattern to
2045 * appropriate chip specific/802.11 pattern.
2048 mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
2049 memset(wow_pattern->pattern_bytes, 0, MAX_PATTERN_SIZE);
2050 memset(wow_pattern->mask_bytes, 0, MAX_PATTERN_SIZE);
2051 memcpy(wow_pattern->pattern_bytes, patterns[i].pattern,
2052 patterns[i].pattern_len);
2053 memcpy(wow_pattern->mask_bytes, patterns[i].mask, mask_len);
2054 wow_pattern->pattern_len = patterns[i].pattern_len;
2057 * just need to take care of deauth and disssoc pattern,
2058 * make sure we don't overwrite them.
2061 ath9k_hw_wow_apply_pattern(ah, wow_pattern->pattern_bytes,
2062 wow_pattern->mask_bytes,
2064 wow_pattern->pattern_len);
2071 static int ath9k_suspend(struct ieee80211_hw *hw,
2072 struct cfg80211_wowlan *wowlan)
2074 struct ath_softc *sc = hw->priv;
2075 struct ath_hw *ah = sc->sc_ah;
2076 struct ath_common *common = ath9k_hw_common(ah);
2077 u32 wow_triggers_enabled = 0;
2080 mutex_lock(&sc->mutex);
2082 ath_cancel_work(sc);
2084 del_timer_sync(&sc->rx_poll_timer);
2086 if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
2087 ath_dbg(common, ANY, "Device not present\n");
2092 if (WARN_ON(!wowlan)) {
2093 ath_dbg(common, WOW, "None of the WoW triggers enabled\n");
2098 if (!device_can_wakeup(sc->dev)) {
2099 ath_dbg(common, WOW, "device_can_wakeup failed, WoW is not enabled\n");
2105 * none of the sta vifs are associated
2106 * and we are not currently handling multivif
2107 * cases, for instance we have to seperately
2108 * configure 'keep alive frame' for each
2112 if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
2113 ath_dbg(common, WOW, "None of the STA vifs are associated\n");
2118 if (sc->nvifs > 1) {
2119 ath_dbg(common, WOW, "WoW for multivif is not yet supported\n");
2124 ath9k_wow_map_triggers(sc, wowlan, &wow_triggers_enabled);
2126 ath_dbg(common, WOW, "WoW triggers enabled 0x%x\n",
2127 wow_triggers_enabled);
2129 ath9k_ps_wakeup(sc);
2131 ath9k_stop_btcoex(sc);
2134 * Enable wake up on recieving disassoc/deauth
2137 ath9k_wow_add_disassoc_deauth_pattern(sc);
2139 if (wow_triggers_enabled & AH_WOW_USER_PATTERN_EN)
2140 ath9k_wow_add_pattern(sc, wowlan);
2142 spin_lock_bh(&sc->sc_pcu_lock);
2144 * To avoid false wake, we enable beacon miss interrupt only
2145 * when we go to sleep. We save the current interrupt mask
2146 * so we can restore it after the system wakes up
2148 sc->wow_intr_before_sleep = ah->imask;
2149 ah->imask &= ~ATH9K_INT_GLOBAL;
2150 ath9k_hw_disable_interrupts(ah);
2151 ah->imask = ATH9K_INT_BMISS | ATH9K_INT_GLOBAL;
2152 ath9k_hw_set_interrupts(ah);
2153 ath9k_hw_enable_interrupts(ah);
2155 spin_unlock_bh(&sc->sc_pcu_lock);
2158 * we can now sync irq and kill any running tasklets, since we already
2159 * disabled interrupts and not holding a spin lock
2161 synchronize_irq(sc->irq);
2162 tasklet_kill(&sc->intr_tq);
2164 ath9k_hw_wow_enable(ah, wow_triggers_enabled);
2166 ath9k_ps_restore(sc);
2167 ath_dbg(common, ANY, "WoW enabled in ath9k\n");
2168 atomic_inc(&sc->wow_sleep_proc_intr);
2171 mutex_unlock(&sc->mutex);
2175 static int ath9k_resume(struct ieee80211_hw *hw)
2177 struct ath_softc *sc = hw->priv;
2178 struct ath_hw *ah = sc->sc_ah;
2179 struct ath_common *common = ath9k_hw_common(ah);
2182 mutex_lock(&sc->mutex);
2184 ath9k_ps_wakeup(sc);
2186 spin_lock_bh(&sc->sc_pcu_lock);
2188 ath9k_hw_disable_interrupts(ah);
2189 ah->imask = sc->wow_intr_before_sleep;
2190 ath9k_hw_set_interrupts(ah);
2191 ath9k_hw_enable_interrupts(ah);
2193 spin_unlock_bh(&sc->sc_pcu_lock);
2195 wow_status = ath9k_hw_wow_wakeup(ah);
2197 if (atomic_read(&sc->wow_got_bmiss_intr) == 0) {
2199 * some devices may not pick beacon miss
2200 * as the reason they woke up so we add
2201 * that here for that shortcoming.
2203 wow_status |= AH_WOW_BEACON_MISS;
2204 atomic_dec(&sc->wow_got_bmiss_intr);
2205 ath_dbg(common, ANY, "Beacon miss interrupt picked up during WoW sleep\n");
2208 atomic_dec(&sc->wow_sleep_proc_intr);
2211 ath_dbg(common, ANY, "Waking up due to WoW triggers %s with WoW status = %x\n",
2212 ath9k_hw_wow_event_to_string(wow_status), wow_status);
2215 ath_restart_work(sc);
2216 ath9k_start_btcoex(sc);
2218 ath9k_ps_restore(sc);
2219 mutex_unlock(&sc->mutex);
2224 static void ath9k_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2226 struct ath_softc *sc = hw->priv;
2228 mutex_lock(&sc->mutex);
2229 device_init_wakeup(sc->dev, 1);
2230 device_set_wakeup_enable(sc->dev, enabled);
2231 mutex_unlock(&sc->mutex);
2236 struct ieee80211_ops ath9k_ops = {
2238 .start = ath9k_start,
2240 .add_interface = ath9k_add_interface,
2241 .change_interface = ath9k_change_interface,
2242 .remove_interface = ath9k_remove_interface,
2243 .config = ath9k_config,
2244 .configure_filter = ath9k_configure_filter,
2245 .sta_add = ath9k_sta_add,
2246 .sta_remove = ath9k_sta_remove,
2247 .sta_notify = ath9k_sta_notify,
2248 .conf_tx = ath9k_conf_tx,
2249 .bss_info_changed = ath9k_bss_info_changed,
2250 .set_key = ath9k_set_key,
2251 .get_tsf = ath9k_get_tsf,
2252 .set_tsf = ath9k_set_tsf,
2253 .reset_tsf = ath9k_reset_tsf,
2254 .ampdu_action = ath9k_ampdu_action,
2255 .get_survey = ath9k_get_survey,
2256 .rfkill_poll = ath9k_rfkill_poll_state,
2257 .set_coverage_class = ath9k_set_coverage_class,
2258 .flush = ath9k_flush,
2259 .tx_frames_pending = ath9k_tx_frames_pending,
2260 .tx_last_beacon = ath9k_tx_last_beacon,
2261 .get_stats = ath9k_get_stats,
2262 .set_antenna = ath9k_set_antenna,
2263 .get_antenna = ath9k_get_antenna,
2265 #ifdef CONFIG_PM_SLEEP
2266 .suspend = ath9k_suspend,
2267 .resume = ath9k_resume,
2268 .set_wakeup = ath9k_set_wakeup,
2271 #ifdef CONFIG_ATH9K_DEBUGFS
2272 .get_et_sset_count = ath9k_get_et_sset_count,
2273 .get_et_stats = ath9k_get_et_stats,
2274 .get_et_strings = ath9k_get_et_strings,
2277 #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_DEBUGFS)
2278 .sta_add_debugfs = ath9k_sta_add_debugfs,
2279 .sta_remove_debugfs = ath9k_sta_remove_debugfs,