main.c 57.4 KB
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/*
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 * Copyright (c) 2008-2011 Atheros Communications Inc.
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 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/nl80211.h>
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#include <linux/delay.h>
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#include "ath9k.h"
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#include "btcoex.h"
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static void ath9k_set_assoc_state(struct ath_softc *sc,
				  struct ieee80211_vif *vif);

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u8 ath9k_parse_mpdudensity(u8 mpdudensity)
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{
	/*
	 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
	 *   0 for no restriction
	 *   1 for 1/4 us
	 *   2 for 1/2 us
	 *   3 for 1 us
	 *   4 for 2 us
	 *   5 for 4 us
	 *   6 for 8 us
	 *   7 for 16 us
	 */
	switch (mpdudensity) {
	case 0:
		return 0;
	case 1:
	case 2:
	case 3:
		/* Our lower layer calculations limit our precision to
		   1 microsecond */
		return 1;
	case 4:
		return 2;
	case 5:
		return 4;
	case 6:
		return 8;
	case 7:
		return 16;
	default:
		return 0;
	}
}

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static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
{
	bool pending = false;

	spin_lock_bh(&txq->axq_lock);

	if (txq->axq_depth || !list_empty(&txq->axq_acq))
		pending = true;

	spin_unlock_bh(&txq->axq_lock);
	return pending;
}

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static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
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{
	unsigned long flags;
	bool ret;

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	spin_lock_irqsave(&sc->sc_pm_lock, flags);
	ret = ath9k_hw_setpower(sc->sc_ah, mode);
	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
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	return ret;
}

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void ath9k_ps_wakeup(struct ath_softc *sc)
{
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	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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	unsigned long flags;
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	enum ath9k_power_mode power_mode;
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	spin_lock_irqsave(&sc->sc_pm_lock, flags);
	if (++sc->ps_usecount != 1)
		goto unlock;

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	power_mode = sc->sc_ah->power_mode;
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	ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
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	/*
	 * While the hardware is asleep, the cycle counters contain no
	 * useful data. Better clear them now so that they don't mess up
	 * survey data results.
	 */
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	if (power_mode != ATH9K_PM_AWAKE) {
		spin_lock(&common->cc_lock);
		ath_hw_cycle_counters_update(common);
		memset(&common->cc_survey, 0, sizeof(common->cc_survey));
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		memset(&common->cc_ani, 0, sizeof(common->cc_ani));
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		spin_unlock(&common->cc_lock);
	}
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 unlock:
	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}

void ath9k_ps_restore(struct ath_softc *sc)
{
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	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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	enum ath9k_power_mode mode;
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	unsigned long flags;
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	bool reset;
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	spin_lock_irqsave(&sc->sc_pm_lock, flags);
	if (--sc->ps_usecount != 0)
		goto unlock;

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	if (sc->ps_idle) {
		ath9k_hw_setrxabort(sc->sc_ah, 1);
		ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
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		mode = ATH9K_PM_FULL_SLEEP;
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	} else if (sc->ps_enabled &&
		   !(sc->ps_flags & (PS_WAIT_FOR_BEACON |
				     PS_WAIT_FOR_CAB |
				     PS_WAIT_FOR_PSPOLL_DATA |
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				     PS_WAIT_FOR_TX_ACK |
				     PS_WAIT_FOR_ANI))) {
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		mode = ATH9K_PM_NETWORK_SLEEP;
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		if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
			ath9k_btcoex_stop_gen_timer(sc);
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	} else {
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		goto unlock;
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	}
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	spin_lock(&common->cc_lock);
	ath_hw_cycle_counters_update(common);
	spin_unlock(&common->cc_lock);

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	ath9k_hw_setpower(sc->sc_ah, mode);
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 unlock:
	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}

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static void __ath_cancel_work(struct ath_softc *sc)
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{
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	cancel_work_sync(&sc->paprd_work);
	cancel_work_sync(&sc->hw_check_work);
	cancel_delayed_work_sync(&sc->tx_complete_work);
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	cancel_delayed_work_sync(&sc->hw_pll_work);
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#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
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	if (ath9k_hw_mci_is_enabled(sc->sc_ah))
		cancel_work_sync(&sc->mci_work);
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#endif
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}
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static void ath_cancel_work(struct ath_softc *sc)
{
	__ath_cancel_work(sc);
	cancel_work_sync(&sc->hw_reset_work);
}
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static void ath_restart_work(struct ath_softc *sc)
{
	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);

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	if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9485(sc->sc_ah) ||
	    AR_SREV_9550(sc->sc_ah))
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		ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
				     msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));

	ath_start_rx_poll(sc, 3);
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	ath_start_ani(sc);
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}

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static bool ath_prepare_reset(struct ath_softc *sc, bool flush)
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{
	struct ath_hw *ah = sc->sc_ah;
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	bool ret = true;
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	ieee80211_stop_queues(sc->hw);
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	sc->hw_busy_count = 0;
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	ath_stop_ani(sc);
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	del_timer_sync(&sc->rx_poll_timer);
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	ath9k_debug_samp_bb_mac(sc);
	ath9k_hw_disable_interrupts(ah);
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	if (!ath_drain_all_txq(sc))
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		ret = false;
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	if (!ath_stoprecv(sc))
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		ret = false;

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	if (!flush) {
		if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
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			ath_rx_tasklet(sc, 1, true);
		ath_rx_tasklet(sc, 1, false);
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	} else {
		ath_flushrecv(sc);
	}
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	return ret;
}
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static bool ath_complete_reset(struct ath_softc *sc, bool start)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
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	unsigned long flags;
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	if (ath_startrecv(sc) != 0) {
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		ath_err(common, "Unable to restart recv logic\n");
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		return false;
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	}

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	ath9k_cmn_update_txpow(ah, sc->curtxpow,
			       sc->config.txpowlimit, &sc->curtxpow);
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	clear_bit(SC_OP_HW_RESET, &sc->sc_flags);
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	ath9k_hw_set_interrupts(ah);
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	ath9k_hw_enable_interrupts(ah);
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	if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) {
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		if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
			goto work;

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		ath9k_set_beacon(sc);
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		if (ah->opmode == NL80211_IFTYPE_STATION &&
		    test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
			spin_lock_irqsave(&sc->sc_pm_lock, flags);
			sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
			spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
		}
	work:
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		ath_restart_work(sc);
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	}

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	if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3)
		ath_ant_comb_update(sc);
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	ieee80211_wake_queues(sc->hw);

	return true;
}

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static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan)
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{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_cal_data *caldata = NULL;
	bool fastcc = true;
	bool flush = false;
	int r;

	__ath_cancel_work(sc);

	spin_lock_bh(&sc->sc_pcu_lock);
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	if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
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		fastcc = false;
		caldata = &sc->caldata;
	}

	if (!hchan) {
		fastcc = false;
		flush = true;
		hchan = ah->curchan;
	}

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	if (!ath_prepare_reset(sc, flush))
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		fastcc = false;

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	ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
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		hchan->channel, IS_CHAN_HT40(hchan), fastcc);
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	r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
	if (r) {
		ath_err(common,
			"Unable to reset channel, reset status %d\n", r);
		goto out;
	}

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	if (ath9k_hw_mci_is_enabled(sc->sc_ah) &&
	    (sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL))
		ath9k_mci_set_txpower(sc, true, false);

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	if (!ath_complete_reset(sc, true))
		r = -EIO;

out:
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	spin_unlock_bh(&sc->sc_pcu_lock);
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	return r;
}


/*
 * Set/change channels.  If the channel is really being changed, it's done
 * by reseting the chip.  To accomplish this we must first cleanup any pending
 * DMA, then restart stuff.
*/
static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
		    struct ath9k_channel *hchan)
{
	int r;

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	if (test_bit(SC_OP_INVALID, &sc->sc_flags))
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		return -EIO;

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	r = ath_reset_internal(sc, hchan);
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	return r;
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}

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static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
			    struct ieee80211_vif *vif)
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{
	struct ath_node *an;
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	u8 density;
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	an = (struct ath_node *)sta->drv_priv;

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	an->sc = sc;
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	an->sta = sta;
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	an->vif = vif;
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	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
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		ath_tx_node_init(sc, an);
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		an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
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				     sta->ht_cap.ampdu_factor);
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		density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density);
		an->mpdudensity = density;
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	}
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}

static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
{
	struct ath_node *an = (struct ath_node *)sta->drv_priv;

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	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
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		ath_tx_node_cleanup(sc, an);
}

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void ath9k_tasklet(unsigned long data)
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{
	struct ath_softc *sc = (struct ath_softc *)data;
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	struct ath_hw *ah = sc->sc_ah;
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	struct ath_common *common = ath9k_hw_common(ah);
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	enum ath_reset_type type;
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	unsigned long flags;
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	u32 status = sc->intrstatus;
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	u32 rxmask;
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	ath9k_ps_wakeup(sc);
	spin_lock(&sc->sc_pcu_lock);

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	if ((status & ATH9K_INT_FATAL) ||
	    (status & ATH9K_INT_BB_WATCHDOG)) {
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		if (status & ATH9K_INT_FATAL)
			type = RESET_TYPE_FATAL_INT;
		else
			type = RESET_TYPE_BB_WATCHDOG;

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		ath9k_queue_reset(sc, type);
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		goto out;
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	}
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	spin_lock_irqsave(&sc->sc_pm_lock, flags);
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	if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
		/*
		 * TSF sync does not look correct; remain awake to sync with
		 * the next Beacon.
		 */
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		ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
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		sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
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	}
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	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
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	if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
		rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
			  ATH9K_INT_RXORN);
	else
		rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);

	if (status & rxmask) {
		/* Check for high priority Rx first */
		if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
		    (status & ATH9K_INT_RXHP))
			ath_rx_tasklet(sc, 0, true);

		ath_rx_tasklet(sc, 0, false);
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	}

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	if (status & ATH9K_INT_TX) {
		if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
			ath_tx_edma_tasklet(sc);
		else
			ath_tx_tasklet(sc);
	}
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	ath9k_btcoex_handle_interrupt(sc, status);
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out:
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	/* re-enable hardware interrupt */
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	ath9k_hw_enable_interrupts(ah);
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	spin_unlock(&sc->sc_pcu_lock);
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	ath9k_ps_restore(sc);
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}

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irqreturn_t ath_isr(int irq, void *dev)
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{
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#define SCHED_INTR (				\
		ATH9K_INT_FATAL |		\
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		ATH9K_INT_BB_WATCHDOG |		\
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		ATH9K_INT_RXORN |		\
		ATH9K_INT_RXEOL |		\
		ATH9K_INT_RX |			\
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		ATH9K_INT_RXLP |		\
		ATH9K_INT_RXHP |		\
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		ATH9K_INT_TX |			\
		ATH9K_INT_BMISS |		\
		ATH9K_INT_CST |			\
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		ATH9K_INT_TSFOOR |		\
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		ATH9K_INT_GENTIMER |		\
		ATH9K_INT_MCI)
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	struct ath_softc *sc = dev;
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	struct ath_hw *ah = sc->sc_ah;
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	struct ath_common *common = ath9k_hw_common(ah);
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	enum ath9k_int status;
	bool sched = false;

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	/*
	 * The hardware is not ready/present, don't
	 * touch anything. Note this can happen early
	 * on if the IRQ is shared.
	 */
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	if (test_bit(SC_OP_INVALID, &sc->sc_flags))
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		return IRQ_NONE;
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	/* shared irq, not for us */

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	if (!ath9k_hw_intrpend(ah))
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		return IRQ_NONE;

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	if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) {
		ath9k_hw_kill_interrupts(ah);
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		return IRQ_HANDLED;
461
	}
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	/*
	 * Figure out the reason(s) for the interrupt.  Note
	 * that the hal returns a pseudo-ISR that may include
	 * bits we haven't explicitly enabled so we mask the
	 * value to insure we only process bits we requested.
	 */
	ath9k_hw_getisr(ah, &status);	/* NB: clears ISR too */
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	status &= ah->imask;	/* discard unasked-for bits */
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	/*
	 * If there are no status bits set, then this interrupt was not
	 * for me (should have been caught above).
	 */
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	if (!status)
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		return IRQ_NONE;
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	/* Cache the status */
	sc->intrstatus = status;

	if (status & SCHED_INTR)
		sched = true;

	/*
	 * If a FATAL or RXORN interrupt is received, we have to reset the
	 * chip immediately.
	 */
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	if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
	    !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
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		goto chip_reset;

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	if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
	    (status & ATH9K_INT_BB_WATCHDOG)) {
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		spin_lock(&common->cc_lock);
		ath_hw_cycle_counters_update(common);
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		ar9003_hw_bb_watchdog_dbg_info(ah);
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		spin_unlock(&common->cc_lock);

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		goto chip_reset;
	}
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#ifdef CONFIG_PM_SLEEP
	if (status & ATH9K_INT_BMISS) {
		if (atomic_read(&sc->wow_sleep_proc_intr) == 0) {
			ath_dbg(common, ANY, "during WoW we got a BMISS\n");
			atomic_inc(&sc->wow_got_bmiss_intr);
			atomic_dec(&sc->wow_sleep_proc_intr);
		}
	}
#endif
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	if (status & ATH9K_INT_SWBA)
		tasklet_schedule(&sc->bcon_tasklet);

	if (status & ATH9K_INT_TXURN)
		ath9k_hw_updatetxtriglevel(ah, true);

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	if (status & ATH9K_INT_RXEOL) {
		ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
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		ath9k_hw_set_interrupts(ah);
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	}

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	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
		if (status & ATH9K_INT_TIM_TIMER) {
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			if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
				goto chip_reset;
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			/* Clear RxAbort bit so that we can
			 * receive frames */
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			ath9k_setpower(sc, ATH9K_PM_AWAKE);
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			spin_lock(&sc->sc_pm_lock);
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			ath9k_hw_setrxabort(sc->sc_ah, 0);
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			sc->ps_flags |= PS_WAIT_FOR_BEACON;
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			spin_unlock(&sc->sc_pm_lock);
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		}
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chip_reset:
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	ath_debug_stat_interrupt(sc, status);

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	if (sched) {
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		/* turn off every interrupt */
		ath9k_hw_disable_interrupts(ah);
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543 544 545 546
		tasklet_schedule(&sc->intr_tq);
	}

	return IRQ_HANDLED;
S
Sujith 已提交
547 548

#undef SCHED_INTR
S
Sujith 已提交
549 550
}

551
static int ath_reset(struct ath_softc *sc)
S
Sujith 已提交
552
{
553
	int i, r;
S
Sujith 已提交
554

555
	ath9k_ps_wakeup(sc);
556

557
	r = ath_reset_internal(sc, NULL);
S
Sujith 已提交
558

559 560 561 562 563 564 565
	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
		if (!ATH_TXQ_SETUP(sc, i))
			continue;

		spin_lock_bh(&sc->tx.txq[i].axq_lock);
		ath_txq_schedule(sc, &sc->tx.txq[i]);
		spin_unlock_bh(&sc->tx.txq[i].axq_lock);
S
Sujith 已提交
566 567
	}

568
	ath9k_ps_restore(sc);
S
Sujith 已提交
569

570
	return r;
S
Sujith 已提交
571 572
}

573 574 575 576 577 578 579 580 581
void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
{
#ifdef CONFIG_ATH9K_DEBUGFS
	RESET_STAT_INC(sc, type);
#endif
	set_bit(SC_OP_HW_RESET, &sc->sc_flags);
	ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
}

582 583 584 585
void ath_reset_work(struct work_struct *work)
{
	struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);

586
	ath_reset(sc);
587 588
}

S
Sujith 已提交
589 590 591 592
/**********************/
/* mac80211 callbacks */
/**********************/

593
static int ath9k_start(struct ieee80211_hw *hw)
594
{
595
	struct ath_softc *sc = hw->priv;
596
	struct ath_hw *ah = sc->sc_ah;
597
	struct ath_common *common = ath9k_hw_common(ah);
598
	struct ieee80211_channel *curchan = hw->conf.channel;
S
Sujith 已提交
599
	struct ath9k_channel *init_channel;
600
	int r;
601

602
	ath_dbg(common, CONFIG,
J
Joe Perches 已提交
603 604
		"Starting driver with initial channel: %d MHz\n",
		curchan->center_freq);
605

606
	ath9k_ps_wakeup(sc);
607 608
	mutex_lock(&sc->mutex);

609
	init_channel = ath9k_cmn_get_curchannel(hw, ah);
S
Sujith 已提交
610 611

	/* Reset SERDES registers */
612
	ath9k_hw_configpcipowersave(ah, false);
S
Sujith 已提交
613 614 615 616 617 618 619 620

	/*
	 * The basic interface to setting the hardware in a good
	 * state is ``reset''.  On return the hardware is known to
	 * be powered up and with interrupts disabled.  This must
	 * be followed by initialization of the appropriate bits
	 * and then setup of the interrupt mask.
	 */
621
	spin_lock_bh(&sc->sc_pcu_lock);
F
Felix Fietkau 已提交
622 623 624

	atomic_set(&ah->intr_ref_cnt, -1);

625
	r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
626
	if (r) {
627 628 629
		ath_err(common,
			"Unable to reset hardware; reset status %d (freq %u MHz)\n",
			r, curchan->center_freq);
630
		ah->reset_power_on = false;
S
Sujith 已提交
631 632 633
	}

	/* Setup our intr mask. */
F
Felix Fietkau 已提交
634 635 636 637 638
	ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
		    ATH9K_INT_RXORN | ATH9K_INT_FATAL |
		    ATH9K_INT_GLOBAL;

	if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
639 640 641
		ah->imask |= ATH9K_INT_RXHP |
			     ATH9K_INT_RXLP |
			     ATH9K_INT_BB_WATCHDOG;
F
Felix Fietkau 已提交
642 643
	else
		ah->imask |= ATH9K_INT_RX;
S
Sujith 已提交
644

645
	ah->imask |= ATH9K_INT_GTT;
S
Sujith 已提交
646

647
	if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
P
Pavel Roskin 已提交
648
		ah->imask |= ATH9K_INT_CST;
S
Sujith 已提交
649

650
	ath_mci_enable(sc);
651

S
Sujith Manoharan 已提交
652
	clear_bit(SC_OP_INVALID, &sc->sc_flags);
653
	sc->sc_ah->is_monitoring = false;
S
Sujith 已提交
654

655 656
	if (!ath_complete_reset(sc, false))
		ah->reset_power_on = false;
S
Sujith 已提交
657

F
Felix Fietkau 已提交
658 659 660 661 662 663 664 665 666 667 668 669
	if (ah->led_pin >= 0) {
		ath9k_hw_cfg_output(ah, ah->led_pin,
				    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
		ath9k_hw_set_gpio(ah, ah->led_pin, 0);
	}

	/*
	 * Reset key cache to sane defaults (all entries cleared) instead of
	 * semi-random values after suspend/resume.
	 */
	ath9k_cmn_init_crypto(sc->sc_ah);

670
	spin_unlock_bh(&sc->sc_pcu_lock);
671

672 673
	mutex_unlock(&sc->mutex);

674 675
	ath9k_ps_restore(sc);

676
	return 0;
677 678
}

679 680 681
static void ath9k_tx(struct ieee80211_hw *hw,
		     struct ieee80211_tx_control *control,
		     struct sk_buff *skb)
682
{
683
	struct ath_softc *sc = hw->priv;
684
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
S
Sujith 已提交
685
	struct ath_tx_control txctl;
686
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
S
Sujith Manoharan 已提交
687
	unsigned long flags;
S
Sujith 已提交
688

689
	if (sc->ps_enabled) {
690 691 692 693 694 695 696
		/*
		 * mac80211 does not set PM field for normal data frames, so we
		 * need to update that based on the current PS mode.
		 */
		if (ieee80211_is_data(hdr->frame_control) &&
		    !ieee80211_is_nullfunc(hdr->frame_control) &&
		    !ieee80211_has_pm(hdr->frame_control)) {
697
			ath_dbg(common, PS,
J
Joe Perches 已提交
698
				"Add PM=1 for a TX frame while in PS mode\n");
699 700 701 702
			hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
		}
	}

S
Sujith Manoharan 已提交
703
	if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
704 705 706 707 708 709
		/*
		 * We are using PS-Poll and mac80211 can request TX while in
		 * power save mode. Need to wake up hardware for the TX to be
		 * completed and if needed, also for RX of buffered frames.
		 */
		ath9k_ps_wakeup(sc);
S
Sujith Manoharan 已提交
710
		spin_lock_irqsave(&sc->sc_pm_lock, flags);
711 712
		if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
			ath9k_hw_setrxabort(sc->sc_ah, 0);
713
		if (ieee80211_is_pspoll(hdr->frame_control)) {
714
			ath_dbg(common, PS,
J
Joe Perches 已提交
715
				"Sending PS-Poll to pick a buffered frame\n");
S
Sujith 已提交
716
			sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
717
		} else {
718
			ath_dbg(common, PS, "Wake up to complete TX\n");
S
Sujith 已提交
719
			sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
720 721 722
		}
		/*
		 * The actual restore operation will happen only after
S
Sujith Manoharan 已提交
723
		 * the ps_flags bit is cleared. We are just dropping
724 725
		 * the ps_usecount here.
		 */
S
Sujith Manoharan 已提交
726
		spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
727 728 729
		ath9k_ps_restore(sc);
	}

S
Sujith Manoharan 已提交
730 731 732 733 734 735 736 737 738
	/*
	 * Cannot tx while the hardware is in full sleep, it first needs a full
	 * chip reset to recover from that
	 */
	if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
		ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
		goto exit;
	}

S
Sujith 已提交
739
	memset(&txctl, 0, sizeof(struct ath_tx_control));
740
	txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
741
	txctl.sta = control->sta;
S
Sujith 已提交
742

743
	ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
744

745
	if (ath_tx_start(hw, skb, &txctl) != 0) {
746
		ath_dbg(common, XMIT, "TX failed\n");
B
Ben Greear 已提交
747
		TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
S
Sujith 已提交
748
		goto exit;
749 750
	}

751
	return;
S
Sujith 已提交
752
exit:
F
Felix Fietkau 已提交
753
	ieee80211_free_txskb(hw, skb);
754 755
}

756
static void ath9k_stop(struct ieee80211_hw *hw)
757
{
758
	struct ath_softc *sc = hw->priv;
759
	struct ath_hw *ah = sc->sc_ah;
760
	struct ath_common *common = ath9k_hw_common(ah);
F
Felix Fietkau 已提交
761
	bool prev_idle;
762

S
Sujith 已提交
763 764
	mutex_lock(&sc->mutex);

765
	ath_cancel_work(sc);
766
	del_timer_sync(&sc->rx_poll_timer);
767

S
Sujith Manoharan 已提交
768
	if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
769
		ath_dbg(common, ANY, "Device not present\n");
S
Sujith 已提交
770
		mutex_unlock(&sc->mutex);
S
Sujith 已提交
771 772
		return;
	}
773

774 775 776
	/* Ensure HW is awake when we try to shut it down. */
	ath9k_ps_wakeup(sc);

777 778
	spin_lock_bh(&sc->sc_pcu_lock);

779 780 781
	/* prevent tasklets to enable interrupts once we disable them */
	ah->imask &= ~ATH9K_INT_GLOBAL;

S
Sujith 已提交
782 783
	/* make sure h/w will not generate any interrupt
	 * before setting the invalid flag. */
784
	ath9k_hw_disable_interrupts(ah);
S
Sujith 已提交
785

F
Felix Fietkau 已提交
786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803
	spin_unlock_bh(&sc->sc_pcu_lock);

	/* we can now sync irq and kill any running tasklets, since we already
	 * disabled interrupts and not holding a spin lock */
	synchronize_irq(sc->irq);
	tasklet_kill(&sc->intr_tq);
	tasklet_kill(&sc->bcon_tasklet);

	prev_idle = sc->ps_idle;
	sc->ps_idle = true;

	spin_lock_bh(&sc->sc_pcu_lock);

	if (ah->led_pin >= 0) {
		ath9k_hw_set_gpio(ah, ah->led_pin, 1);
		ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
	}

804
	ath_prepare_reset(sc, true);
S
Sujith 已提交
805

806 807 808 809 810
	if (sc->rx.frag) {
		dev_kfree_skb_any(sc->rx.frag);
		sc->rx.frag = NULL;
	}

F
Felix Fietkau 已提交
811 812
	if (!ah->curchan)
		ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
813

F
Felix Fietkau 已提交
814 815
	ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
	ath9k_hw_phy_disable(ah);
816

F
Felix Fietkau 已提交
817
	ath9k_hw_configpcipowersave(ah, true);
818

F
Felix Fietkau 已提交
819
	spin_unlock_bh(&sc->sc_pcu_lock);
820

F
Felix Fietkau 已提交
821
	ath9k_ps_restore(sc);
S
Sujith 已提交
822

S
Sujith Manoharan 已提交
823
	set_bit(SC_OP_INVALID, &sc->sc_flags);
F
Felix Fietkau 已提交
824
	sc->ps_idle = prev_idle;
825

826 827
	mutex_unlock(&sc->mutex);

828
	ath_dbg(common, CONFIG, "Driver halt\n");
829 830
}

831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851
bool ath9k_uses_beacons(int type)
{
	switch (type) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_ADHOC:
	case NL80211_IFTYPE_MESH_POINT:
		return true;
	default:
		return false;
	}
}

static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
	struct ath9k_vif_iter_data *iter_data = data;
	int i;

	if (iter_data->hw_macaddr)
		for (i = 0; i < ETH_ALEN; i++)
			iter_data->mask[i] &=
				~(iter_data->hw_macaddr[i] ^ mac[i]);
852

853
	switch (vif->type) {
854 855
	case NL80211_IFTYPE_AP:
		iter_data->naps++;
856
		break;
857 858
	case NL80211_IFTYPE_STATION:
		iter_data->nstations++;
B
Bill Jordan 已提交
859
		break;
860
	case NL80211_IFTYPE_ADHOC:
861 862
		iter_data->nadhocs++;
		break;
863
	case NL80211_IFTYPE_MESH_POINT:
864 865 866 867
		iter_data->nmeshes++;
		break;
	case NL80211_IFTYPE_WDS:
		iter_data->nwds++;
868 869
		break;
	default:
870
		break;
871
	}
872
}
873

874 875 876 877 878 879 880 881 882 883 884 885
static void ath9k_sta_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
	struct ath_softc *sc = data;
	struct ath_vif *avp = (void *)vif->drv_priv;

	if (vif->type != NL80211_IFTYPE_STATION)
		return;

	if (avp->primary_sta_vif)
		ath9k_set_assoc_state(sc, vif);
}

886 887 888 889 890
/* Called with sc->mutex held. */
void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
			       struct ath9k_vif_iter_data *iter_data)
{
891
	struct ath_softc *sc = hw->priv;
892 893
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
894

895 896 897 898 899 900 901
	/*
	 * Use the hardware MAC address as reference, the hardware uses it
	 * together with the BSSID mask when matching addresses.
	 */
	memset(iter_data, 0, sizeof(*iter_data));
	iter_data->hw_macaddr = common->macaddr;
	memset(&iter_data->mask, 0xff, ETH_ALEN);
S
Sujith 已提交
902

903 904 905 906
	if (vif)
		ath9k_vif_iter(iter_data, vif->addr, vif);

	/* Get list of all active MAC addresses */
907 908 909
	ieee80211_iterate_active_interfaces_atomic(
		sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
		ath9k_vif_iter, iter_data);
910
}
911

912 913 914 915
/* Called with sc->mutex held. */
static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
					  struct ieee80211_vif *vif)
{
916
	struct ath_softc *sc = hw->priv;
917 918 919
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_vif_iter_data iter_data;
920
	enum nl80211_iftype old_opmode = ah->opmode;
921

922
	ath9k_calculate_iter_data(hw, vif, &iter_data);
923

924 925 926 927
	memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
	ath_hw_setbssidmask(common);

	if (iter_data.naps > 0) {
928
		ath9k_hw_set_tsfadjust(ah, true);
929 930
		ah->opmode = NL80211_IFTYPE_AP;
	} else {
931
		ath9k_hw_set_tsfadjust(ah, false);
S
Sujith 已提交
932

933 934 935
		if (iter_data.nmeshes)
			ah->opmode = NL80211_IFTYPE_MESH_POINT;
		else if (iter_data.nwds)
936 937 938 939 940 941
			ah->opmode = NL80211_IFTYPE_AP;
		else if (iter_data.nadhocs)
			ah->opmode = NL80211_IFTYPE_ADHOC;
		else
			ah->opmode = NL80211_IFTYPE_STATION;
	}
S
Sujith 已提交
942

943 944
	ath9k_hw_setopmode(ah);

945
	if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
P
Pavel Roskin 已提交
946
		ah->imask |= ATH9K_INT_TSFOOR;
947
	else
948
		ah->imask &= ~ATH9K_INT_TSFOOR;
949

950
	ath9k_hw_set_interrupts(ah);
951 952 953 954 955 956 957 958

	/*
	 * If we are changing the opmode to STATION,
	 * a beacon sync needs to be done.
	 */
	if (ah->opmode == NL80211_IFTYPE_STATION &&
	    old_opmode == NL80211_IFTYPE_AP &&
	    test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
959 960 961
		ieee80211_iterate_active_interfaces_atomic(
			sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
			ath9k_sta_vif_iter, sc);
962
	}
963
}
964

965 966
static int ath9k_add_interface(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif)
967
{
968
	struct ath_softc *sc = hw->priv;
969 970
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
971

972
	mutex_lock(&sc->mutex);
973

974
	ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
975 976
	sc->nvifs++;

977
	ath9k_ps_wakeup(sc);
S
Sujith Manoharan 已提交
978
	ath9k_calculate_summary_state(hw, vif);
979 980
	ath9k_ps_restore(sc);

S
Sujith Manoharan 已提交
981 982 983
	if (ath9k_uses_beacons(vif->type))
		ath9k_beacon_assign_slot(sc, vif);

984
	mutex_unlock(&sc->mutex);
985
	return 0;
986 987 988 989 990 991 992
}

static int ath9k_change_interface(struct ieee80211_hw *hw,
				  struct ieee80211_vif *vif,
				  enum nl80211_iftype new_type,
				  bool p2p)
{
993
	struct ath_softc *sc = hw->priv;
994 995
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

996
	ath_dbg(common, CONFIG, "Change Interface\n");
997
	mutex_lock(&sc->mutex);
998 999

	if (ath9k_uses_beacons(vif->type))
S
Sujith Manoharan 已提交
1000
		ath9k_beacon_remove_slot(sc, vif);
1001

1002 1003 1004
	vif->type = new_type;
	vif->p2p = p2p;

1005
	ath9k_ps_wakeup(sc);
S
Sujith Manoharan 已提交
1006
	ath9k_calculate_summary_state(hw, vif);
1007 1008
	ath9k_ps_restore(sc);

S
Sujith Manoharan 已提交
1009 1010 1011
	if (ath9k_uses_beacons(vif->type))
		ath9k_beacon_assign_slot(sc, vif);

1012
	mutex_unlock(&sc->mutex);
1013
	return 0;
1014 1015
}

1016
static void ath9k_remove_interface(struct ieee80211_hw *hw,
1017
				   struct ieee80211_vif *vif)
1018
{
1019
	struct ath_softc *sc = hw->priv;
1020
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1021

1022
	ath_dbg(common, CONFIG, "Detach Interface\n");
1023

1024 1025
	mutex_lock(&sc->mutex);

1026
	sc->nvifs--;
J
Jouni Malinen 已提交
1027

1028
	if (ath9k_uses_beacons(vif->type))
S
Sujith Manoharan 已提交
1029
		ath9k_beacon_remove_slot(sc, vif);
1030

1031
	ath9k_ps_wakeup(sc);
1032
	ath9k_calculate_summary_state(hw, NULL);
1033
	ath9k_ps_restore(sc);
1034 1035

	mutex_unlock(&sc->mutex);
1036 1037
}

1038
static void ath9k_enable_ps(struct ath_softc *sc)
1039
{
P
Pavel Roskin 已提交
1040
	struct ath_hw *ah = sc->sc_ah;
S
Sujith Manoharan 已提交
1041
	struct ath_common *common = ath9k_hw_common(ah);
P
Pavel Roskin 已提交
1042

1043
	sc->ps_enabled = true;
P
Pavel Roskin 已提交
1044 1045 1046
	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
		if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
			ah->imask |= ATH9K_INT_TIM_TIMER;
1047
			ath9k_hw_set_interrupts(ah);
1048
		}
1049
		ath9k_hw_setrxabort(ah, 1);
1050
	}
S
Sujith Manoharan 已提交
1051
	ath_dbg(common, PS, "PowerSave enabled\n");
1052 1053
}

1054 1055 1056
static void ath9k_disable_ps(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;
S
Sujith Manoharan 已提交
1057
	struct ath_common *common = ath9k_hw_common(ah);
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068

	sc->ps_enabled = false;
	ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
		ath9k_hw_setrxabort(ah, 0);
		sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
				  PS_WAIT_FOR_CAB |
				  PS_WAIT_FOR_PSPOLL_DATA |
				  PS_WAIT_FOR_TX_ACK);
		if (ah->imask & ATH9K_INT_TIM_TIMER) {
			ah->imask &= ~ATH9K_INT_TIM_TIMER;
1069
			ath9k_hw_set_interrupts(ah);
1070 1071
		}
	}
S
Sujith Manoharan 已提交
1072
	ath_dbg(common, PS, "PowerSave disabled\n");
1073 1074
}

1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
void ath9k_spectral_scan_trigger(struct ieee80211_hw *hw)
{
	struct ath_softc *sc = hw->priv;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	u32 rxfilter;

	if (!ath9k_hw_ops(ah)->spectral_scan_trigger) {
		ath_err(common, "spectrum analyzer not implemented on this hardware\n");
		return;
	}

	ath9k_ps_wakeup(sc);
	rxfilter = ath9k_hw_getrxfilter(ah);
	ath9k_hw_setrxfilter(ah, rxfilter |
				 ATH9K_RX_FILTER_PHYRADAR |
				 ATH9K_RX_FILTER_PHYERR);

	/* TODO: usually this should not be neccesary, but for some reason
	 * (or in some mode?) the trigger must be called after the
	 * configuration, otherwise the register will have its values reset
	 * (on my ar9220 to value 0x01002310)
	 */
	ath9k_spectral_scan_config(hw, sc->spectral_mode);
	ath9k_hw_ops(ah)->spectral_scan_trigger(ah);
	ath9k_ps_restore(sc);
}

int ath9k_spectral_scan_config(struct ieee80211_hw *hw,
			       enum spectral_mode spectral_mode)
{
	struct ath_softc *sc = hw->priv;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath_spec_scan param;

	if (!ath9k_hw_ops(ah)->spectral_scan_trigger) {
		ath_err(common, "spectrum analyzer not implemented on this hardware\n");
		return -1;
	}

	/* NOTE: this will generate a few samples ...
	 *
	 * TODO: review default parameters, and/or define an interface to set
	 * them.
	 */
	param.enabled = 1;
	param.short_repeat = true;
	param.count = 8;
	param.endless = false;
	param.period = 0xFF;
	param.fft_period = 0xF;

	switch (spectral_mode) {
	case SPECTRAL_DISABLED:
		param.enabled = 0;
		break;
	case SPECTRAL_BACKGROUND:
		/* send endless samples.
		 * TODO: is this really useful for "background"?
		 */
		param.endless = 1;
		break;
	case SPECTRAL_CHANSCAN:
		break;
	case SPECTRAL_MANUAL:
		break;
	default:
		return -1;
	}

	ath9k_ps_wakeup(sc);
	ath9k_hw_ops(ah)->spectral_scan_config(ah, &param);
	ath9k_ps_restore(sc);

	sc->spectral_mode = spectral_mode;

	return 0;
}

1155
static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
1156
{
1157
	struct ath_softc *sc = hw->priv;
1158 1159
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
1160
	struct ieee80211_conf *conf = &hw->conf;
1161
	bool reset_channel = false;
1162

F
Felix Fietkau 已提交
1163
	ath9k_ps_wakeup(sc);
1164
	mutex_lock(&sc->mutex);
1165

1166
	if (changed & IEEE80211_CONF_CHANGE_IDLE) {
1167
		sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1168
		if (sc->ps_idle) {
1169
			ath_cancel_work(sc);
1170 1171 1172
			ath9k_stop_btcoex(sc);
		} else {
			ath9k_start_btcoex(sc);
1173 1174 1175 1176 1177
			/*
			 * The chip needs a reset to properly wake up from
			 * full sleep
			 */
			reset_channel = ah->chip_fullsleep;
1178
		}
1179
	}
1180

1181 1182 1183 1184 1185 1186
	/*
	 * We just prepare to enable PS. We have to wait until our AP has
	 * ACK'd our null data frame to disable RX otherwise we'll ignore
	 * those ACKs and end up retransmitting the same null data frames.
	 * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
	 */
1187
	if (changed & IEEE80211_CONF_CHANGE_PS) {
1188 1189
		unsigned long flags;
		spin_lock_irqsave(&sc->sc_pm_lock, flags);
1190 1191
		if (conf->flags & IEEE80211_CONF_PS)
			ath9k_enable_ps(sc);
1192 1193
		else
			ath9k_disable_ps(sc);
1194
		spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1195 1196
	}

S
Sujith 已提交
1197 1198
	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
		if (conf->flags & IEEE80211_CONF_MONITOR) {
1199
			ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
1200 1201
			sc->sc_ah->is_monitoring = true;
		} else {
1202
			ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
1203
			sc->sc_ah->is_monitoring = false;
S
Sujith 已提交
1204 1205 1206
		}
	}

1207
	if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
1208
		struct ieee80211_channel *curchan = hw->conf.channel;
1209
		int pos = curchan->hw_value;
1210 1211 1212 1213 1214
		int old_pos = -1;
		unsigned long flags;

		if (ah->curchan)
			old_pos = ah->curchan - &ah->channels[0];
J
Johannes Berg 已提交
1215

1216
		ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
1217
			curchan->center_freq, conf->channel_type);
1218

1219 1220 1221 1222 1223
		/* update survey stats for the old channel before switching */
		spin_lock_irqsave(&common->cc_lock, flags);
		ath_update_survey_stats(sc);
		spin_unlock_irqrestore(&common->cc_lock, flags);

1224 1225 1226 1227
		/*
		 * Preserve the current channel values, before updating
		 * the same channel
		 */
1228 1229
		if (ah->curchan && (old_pos == pos))
			ath9k_hw_getnf(ah, ah->curchan);
1230 1231 1232 1233

		ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
					  curchan, conf->channel_type);

1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
		/*
		 * If the operating channel changes, change the survey in-use flags
		 * along with it.
		 * Reset the survey data for the new channel, unless we're switching
		 * back to the operating channel from an off-channel operation.
		 */
		if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
		    sc->cur_survey != &sc->survey[pos]) {

			if (sc->cur_survey)
				sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;

			sc->cur_survey = &sc->survey[pos];

			memset(sc->cur_survey, 0, sizeof(struct survey_info));
			sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
		} else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
			memset(&sc->survey[pos], 0, sizeof(struct survey_info));
		}

1254
		if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
1255
			ath_err(common, "Unable to set channel\n");
1256
			mutex_unlock(&sc->mutex);
1257
			ath9k_ps_restore(sc);
1258 1259
			return -EINVAL;
		}
1260 1261 1262 1263 1264 1265 1266 1267

		/*
		 * The most recent snapshot of channel->noisefloor for the old
		 * channel is only available after the hardware reset. Copy it to
		 * the survey stats now.
		 */
		if (old_pos >= 0)
			ath_update_survey_nf(sc, old_pos);
1268 1269 1270 1271 1272

		/* perform spectral scan if requested. */
		if (sc->scanning && sc->spectral_mode == SPECTRAL_CHANSCAN)
			ath9k_spectral_scan_trigger(hw);

S
Sujith 已提交
1273
	}
1274

1275
	if (changed & IEEE80211_CONF_CHANGE_POWER) {
1276
		ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
S
Sujith 已提交
1277
		sc->config.txpowlimit = 2 * conf->power_level;
1278 1279
		ath9k_cmn_update_txpow(ah, sc->curtxpow,
				       sc->config.txpowlimit, &sc->curtxpow);
1280 1281
	}

1282
	mutex_unlock(&sc->mutex);
F
Felix Fietkau 已提交
1283
	ath9k_ps_restore(sc);
1284

1285 1286 1287
	return 0;
}

1288 1289 1290 1291
#define SUPPORTED_FILTERS			\
	(FIF_PROMISC_IN_BSS |			\
	FIF_ALLMULTI |				\
	FIF_CONTROL |				\
1292
	FIF_PSPOLL |				\
1293 1294
	FIF_OTHER_BSS |				\
	FIF_BCN_PRBRESP_PROMISC |		\
1295
	FIF_PROBE_REQ |				\
1296
	FIF_FCSFAIL)
1297

1298 1299 1300 1301
/* FIXME: sc->sc_full_reset ? */
static void ath9k_configure_filter(struct ieee80211_hw *hw,
				   unsigned int changed_flags,
				   unsigned int *total_flags,
1302
				   u64 multicast)
1303
{
1304
	struct ath_softc *sc = hw->priv;
1305
	u32 rfilt;
1306

1307 1308
	changed_flags &= SUPPORTED_FILTERS;
	*total_flags &= SUPPORTED_FILTERS;
1309

S
Sujith 已提交
1310
	sc->rx.rxfilter = *total_flags;
1311
	ath9k_ps_wakeup(sc);
1312 1313
	rfilt = ath_calcrxfilter(sc);
	ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
1314
	ath9k_ps_restore(sc);
1315

1316 1317
	ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
		rfilt);
1318
}
1319

1320 1321 1322
static int ath9k_sta_add(struct ieee80211_hw *hw,
			 struct ieee80211_vif *vif,
			 struct ieee80211_sta *sta)
1323
{
1324
	struct ath_softc *sc = hw->priv;
1325 1326 1327
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_node *an = (struct ath_node *) sta->drv_priv;
	struct ieee80211_key_conf ps_key = { };
1328

1329
	ath_node_attach(sc, sta, vif);
1330 1331 1332 1333 1334

	if (vif->type != NL80211_IFTYPE_AP &&
	    vif->type != NL80211_IFTYPE_AP_VLAN)
		return 0;

1335
	an->ps_key = ath_key_config(common, vif, sta, &ps_key);
1336 1337 1338 1339

	return 0;
}

1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353
static void ath9k_del_ps_key(struct ath_softc *sc,
			     struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_node *an = (struct ath_node *) sta->drv_priv;
	struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };

	if (!an->ps_key)
	    return;

	ath_key_delete(common, &ps_key);
}

1354 1355 1356 1357
static int ath9k_sta_remove(struct ieee80211_hw *hw,
			    struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta)
{
1358
	struct ath_softc *sc = hw->priv;
1359

1360
	ath9k_del_ps_key(sc, vif, sta);
1361 1362 1363
	ath_node_detach(sc, sta);

	return 0;
1364 1365
}

1366 1367 1368 1369 1370 1371 1372 1373
static void ath9k_sta_notify(struct ieee80211_hw *hw,
			 struct ieee80211_vif *vif,
			 enum sta_notify_cmd cmd,
			 struct ieee80211_sta *sta)
{
	struct ath_softc *sc = hw->priv;
	struct ath_node *an = (struct ath_node *) sta->drv_priv;

1374
	if (!sta->ht_cap.ht_supported)
1375 1376
		return;

1377 1378 1379
	switch (cmd) {
	case STA_NOTIFY_SLEEP:
		an->sleeping = true;
1380
		ath_tx_aggr_sleep(sta, sc, an);
1381 1382 1383 1384 1385 1386 1387 1388
		break;
	case STA_NOTIFY_AWAKE:
		an->sleeping = false;
		ath_tx_aggr_wakeup(sc, an);
		break;
	}
}

1389 1390
static int ath9k_conf_tx(struct ieee80211_hw *hw,
			 struct ieee80211_vif *vif, u16 queue,
1391
			 const struct ieee80211_tx_queue_params *params)
1392
{
1393
	struct ath_softc *sc = hw->priv;
1394
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1395
	struct ath_txq *txq;
1396
	struct ath9k_tx_queue_info qi;
1397
	int ret = 0;
1398

1399
	if (queue >= IEEE80211_NUM_ACS)
1400
		return 0;
1401

1402 1403
	txq = sc->tx.txq_map[queue];

1404
	ath9k_ps_wakeup(sc);
1405 1406
	mutex_lock(&sc->mutex);

1407 1408
	memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));

1409 1410 1411
	qi.tqi_aifs = params->aifs;
	qi.tqi_cwmin = params->cw_min;
	qi.tqi_cwmax = params->cw_max;
1412
	qi.tqi_burstTime = params->txop * 32;
1413

1414
	ath_dbg(common, CONFIG,
J
Joe Perches 已提交
1415 1416 1417
		"Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
		queue, txq->axq_qnum, params->aifs, params->cw_min,
		params->cw_max, params->txop);
1418

1419
	ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
1420
	ret = ath_txq_update(sc, txq->axq_qnum, &qi);
1421
	if (ret)
1422
		ath_err(common, "TXQ Update failed\n");
1423

1424
	mutex_unlock(&sc->mutex);
1425
	ath9k_ps_restore(sc);
1426

1427 1428
	return ret;
}
1429

1430 1431
static int ath9k_set_key(struct ieee80211_hw *hw,
			 enum set_key_cmd cmd,
1432 1433
			 struct ieee80211_vif *vif,
			 struct ieee80211_sta *sta,
1434 1435
			 struct ieee80211_key_conf *key)
{
1436
	struct ath_softc *sc = hw->priv;
1437
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1438
	int ret = 0;
1439

1440
	if (ath9k_modparam_nohwcrypt)
1441 1442
		return -ENOSPC;

C
Chun-Yeow Yeoh 已提交
1443 1444
	if ((vif->type == NL80211_IFTYPE_ADHOC ||
	     vif->type == NL80211_IFTYPE_MESH_POINT) &&
J
Jouni Malinen 已提交
1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457
	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
		/*
		 * For now, disable hw crypto for the RSN IBSS group keys. This
		 * could be optimized in the future to use a modified key cache
		 * design to support per-STA RX GTK, but until that gets
		 * implemented, use of software crypto for group addressed
		 * frames is a acceptable to allow RSN IBSS to be used.
		 */
		return -EOPNOTSUPP;
	}

1458
	mutex_lock(&sc->mutex);
1459
	ath9k_ps_wakeup(sc);
1460
	ath_dbg(common, CONFIG, "Set HW Key\n");
1461

1462 1463
	switch (cmd) {
	case SET_KEY:
1464 1465 1466
		if (sta)
			ath9k_del_ps_key(sc, vif, sta);

1467
		ret = ath_key_config(common, vif, sta, key);
1468 1469
		if (ret >= 0) {
			key->hw_key_idx = ret;
1470 1471
			/* push IV and Michael MIC generation to stack */
			key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1472
			if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
1473
				key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1474 1475
			if (sc->sc_ah->sw_mgmt_crypto &&
			    key->cipher == WLAN_CIPHER_SUITE_CCMP)
1476
				key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1477
			ret = 0;
1478 1479 1480
		}
		break;
	case DISABLE_KEY:
1481
		ath_key_delete(common, key);
1482 1483 1484 1485
		break;
	default:
		ret = -EINVAL;
	}
1486

1487
	ath9k_ps_restore(sc);
1488 1489
	mutex_unlock(&sc->mutex);

1490 1491
	return ret;
}
1492 1493 1494

static void ath9k_set_assoc_state(struct ath_softc *sc,
				  struct ieee80211_vif *vif)
1495 1496 1497
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_vif *avp = (void *)vif->drv_priv;
1498
	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
S
Sujith Manoharan 已提交
1499
	unsigned long flags;
1500 1501 1502 1503

	set_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
	avp->primary_sta_vif = true;

1504
	/*
1505 1506 1507 1508
	 * Set the AID, BSSID and do beacon-sync only when
	 * the HW opmode is STATION.
	 *
	 * But the primary bit is set above in any case.
1509
	 */
1510
	if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
1511 1512
		return;

1513 1514 1515
	memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
	common->curaid = bss_conf->aid;
	ath9k_hw_write_associd(sc->sc_ah);
S
Sujith Manoharan 已提交
1516

1517 1518
	sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
	sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
1519

1520 1521 1522
	spin_lock_irqsave(&sc->sc_pm_lock, flags);
	sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
1523

1524 1525 1526
	if (ath9k_hw_mci_is_enabled(sc->sc_ah))
		ath9k_mci_update_wlan_channels(sc, false);

1527 1528 1529
	ath_dbg(common, CONFIG,
		"Primary Station interface: %pM, BSSID: %pM\n",
		vif->addr, common->curbssid);
1530 1531
}

1532
static void ath9k_bss_assoc_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
1533
{
1534
	struct ath_softc *sc = data;
1535 1536
	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;

1537
	if (test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags))
1538 1539
		return;

1540 1541
	if (bss_conf->assoc)
		ath9k_set_assoc_state(sc, vif);
1542
}
1543

1544 1545 1546 1547 1548
static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
				   struct ieee80211_vif *vif,
				   struct ieee80211_bss_conf *bss_conf,
				   u32 changed)
{
S
Sujith Manoharan 已提交
1549 1550 1551 1552 1553
#define CHECK_ANI				\
	(BSS_CHANGED_ASSOC |			\
	 BSS_CHANGED_IBSS |			\
	 BSS_CHANGED_BEACON_ENABLED)

1554
	struct ath_softc *sc = hw->priv;
1555
	struct ath_hw *ah = sc->sc_ah;
1556
	struct ath_common *common = ath9k_hw_common(ah);
1557
	struct ath_vif *avp = (void *)vif->drv_priv;
1558
	int slottime;
1559

1560
	ath9k_ps_wakeup(sc);
1561 1562
	mutex_lock(&sc->mutex);

1563
	if (changed & BSS_CHANGED_ASSOC) {
1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574
		ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
			bss_conf->bssid, bss_conf->assoc);

		if (avp->primary_sta_vif && !bss_conf->assoc) {
			clear_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
			avp->primary_sta_vif = false;

			if (ah->opmode == NL80211_IFTYPE_STATION)
				clear_bit(SC_OP_BEACONS, &sc->sc_flags);
		}

1575 1576 1577
		ieee80211_iterate_active_interfaces_atomic(
			sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
			ath9k_bss_assoc_iter, sc);
1578

1579 1580 1581 1582 1583
		if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags) &&
		    ah->opmode == NL80211_IFTYPE_STATION) {
			memset(common->curbssid, 0, ETH_ALEN);
			common->curaid = 0;
			ath9k_hw_write_associd(sc->sc_ah);
1584 1585
			if (ath9k_hw_mci_is_enabled(sc->sc_ah))
				ath9k_mci_update_wlan_channels(sc, true);
1586
		}
S
Sujith 已提交
1587
	}
1588

1589 1590 1591 1592 1593 1594
	if (changed & BSS_CHANGED_IBSS) {
		memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
		common->curaid = bss_conf->aid;
		ath9k_hw_write_associd(sc->sc_ah);
	}

S
Sujith Manoharan 已提交
1595 1596
	if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
	    (changed & BSS_CHANGED_BEACON_INT)) {
1597 1598 1599
		if (ah->opmode == NL80211_IFTYPE_AP &&
		    bss_conf->enable_beacon)
			ath9k_set_tsfadjust(sc, vif);
S
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1600 1601
		if (ath9k_allow_beacon_config(sc, vif))
			ath9k_beacon_config(sc, vif, changed);
1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
	}

	if (changed & BSS_CHANGED_ERP_SLOT) {
		if (bss_conf->use_short_slot)
			slottime = 9;
		else
			slottime = 20;
		if (vif->type == NL80211_IFTYPE_AP) {
			/*
			 * Defer update, so that connected stations can adjust
			 * their settings at the same time.
			 * See beacon.c for more details
			 */
			sc->beacon.slottime = slottime;
			sc->beacon.updateslot = UPDATE;
		} else {
			ah->slottime = slottime;
			ath9k_hw_init_global_settings(ah);
		}
1621 1622
	}

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1623 1624 1625
	if (changed & CHECK_ANI)
		ath_check_ani(sc);

1626
	mutex_unlock(&sc->mutex);
1627
	ath9k_ps_restore(sc);
S
Sujith Manoharan 已提交
1628 1629

#undef CHECK_ANI
1630
}
1631

1632
static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1633
{
1634
	struct ath_softc *sc = hw->priv;
1635
	u64 tsf;
1636

1637
	mutex_lock(&sc->mutex);
1638
	ath9k_ps_wakeup(sc);
1639
	tsf = ath9k_hw_gettsf64(sc->sc_ah);
1640
	ath9k_ps_restore(sc);
1641
	mutex_unlock(&sc->mutex);
1642

1643 1644
	return tsf;
}
1645

1646 1647 1648
static void ath9k_set_tsf(struct ieee80211_hw *hw,
			  struct ieee80211_vif *vif,
			  u64 tsf)
1649
{
1650
	struct ath_softc *sc = hw->priv;
1651

1652
	mutex_lock(&sc->mutex);
1653
	ath9k_ps_wakeup(sc);
1654
	ath9k_hw_settsf64(sc->sc_ah, tsf);
1655
	ath9k_ps_restore(sc);
1656
	mutex_unlock(&sc->mutex);
1657 1658
}

1659
static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1660
{
1661
	struct ath_softc *sc = hw->priv;
1662

1663
	mutex_lock(&sc->mutex);
1664 1665

	ath9k_ps_wakeup(sc);
1666
	ath9k_hw_reset_tsf(sc->sc_ah);
1667 1668
	ath9k_ps_restore(sc);

1669
	mutex_unlock(&sc->mutex);
1670
}
1671

1672
static int ath9k_ampdu_action(struct ieee80211_hw *hw,
1673
			      struct ieee80211_vif *vif,
1674 1675
			      enum ieee80211_ampdu_mlme_action action,
			      struct ieee80211_sta *sta,
1676
			      u16 tid, u16 *ssn, u8 buf_size)
1677
{
1678
	struct ath_softc *sc = hw->priv;
1679
	int ret = 0;
1680

1681 1682
	local_bh_disable();

1683 1684 1685 1686 1687 1688
	switch (action) {
	case IEEE80211_AMPDU_RX_START:
		break;
	case IEEE80211_AMPDU_RX_STOP:
		break;
	case IEEE80211_AMPDU_TX_START:
1689
		ath9k_ps_wakeup(sc);
1690 1691 1692
		ret = ath_tx_aggr_start(sc, sta, tid, ssn);
		if (!ret)
			ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1693
		ath9k_ps_restore(sc);
1694
		break;
1695 1696 1697
	case IEEE80211_AMPDU_TX_STOP_CONT:
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1698
		ath9k_ps_wakeup(sc);
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1699
		ath_tx_aggr_stop(sc, sta, tid);
1700
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1701
		ath9k_ps_restore(sc);
1702
		break;
1703
	case IEEE80211_AMPDU_TX_OPERATIONAL:
1704
		ath9k_ps_wakeup(sc);
1705
		ath_tx_aggr_resume(sc, sta, tid);
1706
		ath9k_ps_restore(sc);
1707
		break;
1708
	default:
1709
		ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
1710 1711
	}

1712 1713
	local_bh_enable();

1714
	return ret;
1715 1716
}

1717 1718 1719
static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
			     struct survey_info *survey)
{
1720
	struct ath_softc *sc = hw->priv;
1721
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
1722
	struct ieee80211_supported_band *sband;
1723 1724 1725 1726 1727 1728 1729
	struct ieee80211_channel *chan;
	unsigned long flags;
	int pos;

	spin_lock_irqsave(&common->cc_lock, flags);
	if (idx == 0)
		ath_update_survey_stats(sc);
1730 1731 1732 1733 1734 1735

	sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
	if (sband && idx >= sband->n_channels) {
		idx -= sband->n_channels;
		sband = NULL;
	}
1736

1737 1738
	if (!sband)
		sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
1739

1740 1741 1742
	if (!sband || idx >= sband->n_channels) {
		spin_unlock_irqrestore(&common->cc_lock, flags);
		return -ENOENT;
1743
	}
1744

1745 1746 1747 1748 1749 1750
	chan = &sband->channels[idx];
	pos = chan->hw_value;
	memcpy(survey, &sc->survey[pos], sizeof(*survey));
	survey->channel = chan;
	spin_unlock_irqrestore(&common->cc_lock, flags);

1751 1752 1753
	return 0;
}

1754 1755
static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
{
1756
	struct ath_softc *sc = hw->priv;
1757 1758 1759 1760
	struct ath_hw *ah = sc->sc_ah;

	mutex_lock(&sc->mutex);
	ah->coverage_class = coverage_class;
1761 1762

	ath9k_ps_wakeup(sc);
1763
	ath9k_hw_init_global_settings(ah);
1764 1765
	ath9k_ps_restore(sc);

1766 1767 1768
	mutex_unlock(&sc->mutex);
}

1769 1770 1771
static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
{
	struct ath_softc *sc = hw->priv;
1772 1773
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
1774 1775
	int timeout = 200; /* ms */
	int i, j;
1776
	bool drain_txq;
1777 1778 1779 1780

	mutex_lock(&sc->mutex);
	cancel_delayed_work_sync(&sc->tx_complete_work);

1781
	if (ah->ah_flags & AH_UNPLUGGED) {
1782
		ath_dbg(common, ANY, "Device has been unplugged!\n");
1783 1784 1785 1786
		mutex_unlock(&sc->mutex);
		return;
	}

S
Sujith Manoharan 已提交
1787
	if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
1788
		ath_dbg(common, ANY, "Device not present\n");
1789 1790 1791 1792
		mutex_unlock(&sc->mutex);
		return;
	}

1793
	for (j = 0; j < timeout; j++) {
1794
		bool npend = false;
1795 1796 1797

		if (j)
			usleep_range(1000, 2000);
1798

1799 1800 1801 1802
		for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
			if (!ATH_TXQ_SETUP(sc, i))
				continue;

1803 1804 1805 1806
			npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);

			if (npend)
				break;
1807
		}
1808 1809

		if (!npend)
1810
		    break;
1811 1812
	}

1813 1814 1815
	if (drop) {
		ath9k_ps_wakeup(sc);
		spin_lock_bh(&sc->sc_pcu_lock);
1816
		drain_txq = ath_drain_all_txq(sc);
1817
		spin_unlock_bh(&sc->sc_pcu_lock);
1818

1819
		if (!drain_txq)
1820
			ath_reset(sc);
1821

1822 1823 1824
		ath9k_ps_restore(sc);
		ieee80211_wake_queues(hw);
	}
1825

1826 1827 1828 1829
	ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
	mutex_unlock(&sc->mutex);
}

1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
{
	struct ath_softc *sc = hw->priv;
	int i;

	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
		if (!ATH_TXQ_SETUP(sc, i))
			continue;

		if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
			return true;
	}
	return false;
}

1845
static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
1846 1847 1848 1849 1850 1851 1852
{
	struct ath_softc *sc = hw->priv;
	struct ath_hw *ah = sc->sc_ah;
	struct ieee80211_vif *vif;
	struct ath_vif *avp;
	struct ath_buf *bf;
	struct ath_tx_status ts;
1853
	bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
1854 1855 1856 1857 1858 1859
	int status;

	vif = sc->beacon.bslot[0];
	if (!vif)
		return 0;

S
Sujith Manoharan 已提交
1860
	if (!vif->bss_conf.enable_beacon)
1861 1862
		return 0;

S
Sujith Manoharan 已提交
1863 1864
	avp = (void *)vif->drv_priv;

1865
	if (!sc->beacon.tx_processed && !edma) {
1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885
		tasklet_disable(&sc->bcon_tasklet);

		bf = avp->av_bcbuf;
		if (!bf || !bf->bf_mpdu)
			goto skip;

		status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
		if (status == -EINPROGRESS)
			goto skip;

		sc->beacon.tx_processed = true;
		sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);

skip:
		tasklet_enable(&sc->bcon_tasklet);
	}

	return sc->beacon.tx_last;
}

1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899
static int ath9k_get_stats(struct ieee80211_hw *hw,
			   struct ieee80211_low_level_stats *stats)
{
	struct ath_softc *sc = hw->priv;
	struct ath_hw *ah = sc->sc_ah;
	struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;

	stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
	stats->dot11RTSFailureCount = mib_stats->rts_bad;
	stats->dot11FCSErrorCount = mib_stats->fcs_bad;
	stats->dot11RTSSuccessCount = mib_stats->rts_good;
	return 0;
}

1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917
static u32 fill_chainmask(u32 cap, u32 new)
{
	u32 filled = 0;
	int i;

	for (i = 0; cap && new; i++, cap >>= 1) {
		if (!(cap & BIT(0)))
			continue;

		if (new & BIT(0))
			filled |= BIT(i);

		new >>= 1;
	}

	return filled;
}

1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931
static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
{
	switch (val & 0x7) {
	case 0x1:
	case 0x3:
	case 0x7:
		return true;
	case 0x2:
		return (ah->caps.rx_chainmask == 1);
	default:
		return false;
	}
}

1932 1933 1934 1935 1936
static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
{
	struct ath_softc *sc = hw->priv;
	struct ath_hw *ah = sc->sc_ah;

1937 1938 1939 1940
	if (ah->caps.rx_chainmask != 1)
		rx_ant |= tx_ant;

	if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
		return -EINVAL;

	sc->ant_rx = rx_ant;
	sc->ant_tx = tx_ant;

	if (ah->caps.rx_chainmask == 1)
		return 0;

	/* AR9100 runs into calibration issues if not all rx chains are enabled */
	if (AR_SREV_9100(ah))
		ah->rxchainmask = 0x7;
	else
		ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);

	ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
	ath9k_reload_chainmask_settings(sc);

	return 0;
}

static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
{
	struct ath_softc *sc = hw->priv;

	*tx_ant = sc->ant_tx;
	*rx_ant = sc->ant_rx;
	return 0;
}

1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172
#ifdef CONFIG_PM_SLEEP

static void ath9k_wow_map_triggers(struct ath_softc *sc,
				   struct cfg80211_wowlan *wowlan,
				   u32 *wow_triggers)
{
	if (wowlan->disconnect)
		*wow_triggers |= AH_WOW_LINK_CHANGE |
				 AH_WOW_BEACON_MISS;
	if (wowlan->magic_pkt)
		*wow_triggers |= AH_WOW_MAGIC_PATTERN_EN;

	if (wowlan->n_patterns)
		*wow_triggers |= AH_WOW_USER_PATTERN_EN;

	sc->wow_enabled = *wow_triggers;

}

static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	struct ath9k_hw_capabilities *pcaps = &ah->caps;
	int pattern_count = 0;
	int i, byte_cnt;
	u8 dis_deauth_pattern[MAX_PATTERN_SIZE];
	u8 dis_deauth_mask[MAX_PATTERN_SIZE];

	memset(dis_deauth_pattern, 0, MAX_PATTERN_SIZE);
	memset(dis_deauth_mask, 0, MAX_PATTERN_SIZE);

	/*
	 * Create Dissassociate / Deauthenticate packet filter
	 *
	 *     2 bytes        2 byte    6 bytes   6 bytes  6 bytes
	 *  +--------------+----------+---------+--------+--------+----
	 *  + Frame Control+ Duration +   DA    +  SA    +  BSSID +
	 *  +--------------+----------+---------+--------+--------+----
	 *
	 * The above is the management frame format for disassociate/
	 * deauthenticate pattern, from this we need to match the first byte
	 * of 'Frame Control' and DA, SA, and BSSID fields
	 * (skipping 2nd byte of FC and Duration feild.
	 *
	 * Disassociate pattern
	 * --------------------
	 * Frame control = 00 00 1010
	 * DA, SA, BSSID = x:x:x:x:x:x
	 * Pattern will be A0000000 | x:x:x:x:x:x | x:x:x:x:x:x
	 *			    | x:x:x:x:x:x  -- 22 bytes
	 *
	 * Deauthenticate pattern
	 * ----------------------
	 * Frame control = 00 00 1100
	 * DA, SA, BSSID = x:x:x:x:x:x
	 * Pattern will be C0000000 | x:x:x:x:x:x | x:x:x:x:x:x
	 *			    | x:x:x:x:x:x  -- 22 bytes
	 */

	/* Create Disassociate Pattern first */

	byte_cnt = 0;

	/* Fill out the mask with all FF's */

	for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++)
		dis_deauth_mask[i] = 0xff;

	/* copy the first byte of frame control field */
	dis_deauth_pattern[byte_cnt] = 0xa0;
	byte_cnt++;

	/* skip 2nd byte of frame control and Duration field */
	byte_cnt += 3;

	/*
	 * need not match the destination mac address, it can be a broadcast
	 * mac address or an unicast to this station
	 */
	byte_cnt += 6;

	/* copy the source mac address */
	memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);

	byte_cnt += 6;

	/* copy the bssid, its same as the source mac address */

	memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);

	/* Create Disassociate pattern mask */

	if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_EXACT) {

		if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_DWORD) {
			/*
			 * for AR9280, because of hardware limitation, the
			 * first 4 bytes have to be matched for all patterns.
			 * the mask for disassociation and de-auth pattern
			 * matching need to enable the first 4 bytes.
			 * also the duration field needs to be filled.
			 */
			dis_deauth_mask[0] = 0xf0;

			/*
			 * fill in duration field
			 FIXME: what is the exact value ?
			 */
			dis_deauth_pattern[2] = 0xff;
			dis_deauth_pattern[3] = 0xff;
		} else {
			dis_deauth_mask[0] = 0xfe;
		}

		dis_deauth_mask[1] = 0x03;
		dis_deauth_mask[2] = 0xc0;
	} else {
		dis_deauth_mask[0] = 0xef;
		dis_deauth_mask[1] = 0x3f;
		dis_deauth_mask[2] = 0x00;
		dis_deauth_mask[3] = 0xfc;
	}

	ath_dbg(common, WOW, "Adding disassoc/deauth patterns for WoW\n");

	ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
				   pattern_count, byte_cnt);

	pattern_count++;
	/*
	 * for de-authenticate pattern, only the first byte of the frame
	 * control field gets changed from 0xA0 to 0xC0
	 */
	dis_deauth_pattern[0] = 0xC0;

	ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
				   pattern_count, byte_cnt);

}

static void ath9k_wow_add_pattern(struct ath_softc *sc,
				  struct cfg80211_wowlan *wowlan)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath9k_wow_pattern *wow_pattern = NULL;
	struct cfg80211_wowlan_trig_pkt_pattern *patterns = wowlan->patterns;
	int mask_len;
	s8 i = 0;

	if (!wowlan->n_patterns)
		return;

	/*
	 * Add the new user configured patterns
	 */
	for (i = 0; i < wowlan->n_patterns; i++) {

		wow_pattern = kzalloc(sizeof(*wow_pattern), GFP_KERNEL);

		if (!wow_pattern)
			return;

		/*
		 * TODO: convert the generic user space pattern to
		 * appropriate chip specific/802.11 pattern.
		 */

		mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
		memset(wow_pattern->pattern_bytes, 0, MAX_PATTERN_SIZE);
		memset(wow_pattern->mask_bytes, 0, MAX_PATTERN_SIZE);
		memcpy(wow_pattern->pattern_bytes, patterns[i].pattern,
		       patterns[i].pattern_len);
		memcpy(wow_pattern->mask_bytes, patterns[i].mask, mask_len);
		wow_pattern->pattern_len = patterns[i].pattern_len;

		/*
		 * just need to take care of deauth and disssoc pattern,
		 * make sure we don't overwrite them.
		 */

		ath9k_hw_wow_apply_pattern(ah, wow_pattern->pattern_bytes,
					   wow_pattern->mask_bytes,
					   i + 2,
					   wow_pattern->pattern_len);
		kfree(wow_pattern);

	}

}

static int ath9k_suspend(struct ieee80211_hw *hw,
			 struct cfg80211_wowlan *wowlan)
{
	struct ath_softc *sc = hw->priv;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	u32 wow_triggers_enabled = 0;
	int ret = 0;

	mutex_lock(&sc->mutex);

	ath_cancel_work(sc);
2173
	ath_stop_ani(sc);
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324
	del_timer_sync(&sc->rx_poll_timer);

	if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
		ath_dbg(common, ANY, "Device not present\n");
		ret = -EINVAL;
		goto fail_wow;
	}

	if (WARN_ON(!wowlan)) {
		ath_dbg(common, WOW, "None of the WoW triggers enabled\n");
		ret = -EINVAL;
		goto fail_wow;
	}

	if (!device_can_wakeup(sc->dev)) {
		ath_dbg(common, WOW, "device_can_wakeup failed, WoW is not enabled\n");
		ret = 1;
		goto fail_wow;
	}

	/*
	 * none of the sta vifs are associated
	 * and we are not currently handling multivif
	 * cases, for instance we have to seperately
	 * configure 'keep alive frame' for each
	 * STA.
	 */

	if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
		ath_dbg(common, WOW, "None of the STA vifs are associated\n");
		ret = 1;
		goto fail_wow;
	}

	if (sc->nvifs > 1) {
		ath_dbg(common, WOW, "WoW for multivif is not yet supported\n");
		ret = 1;
		goto fail_wow;
	}

	ath9k_wow_map_triggers(sc, wowlan, &wow_triggers_enabled);

	ath_dbg(common, WOW, "WoW triggers enabled 0x%x\n",
		wow_triggers_enabled);

	ath9k_ps_wakeup(sc);

	ath9k_stop_btcoex(sc);

	/*
	 * Enable wake up on recieving disassoc/deauth
	 * frame by default.
	 */
	ath9k_wow_add_disassoc_deauth_pattern(sc);

	if (wow_triggers_enabled & AH_WOW_USER_PATTERN_EN)
		ath9k_wow_add_pattern(sc, wowlan);

	spin_lock_bh(&sc->sc_pcu_lock);
	/*
	 * To avoid false wake, we enable beacon miss interrupt only
	 * when we go to sleep. We save the current interrupt mask
	 * so we can restore it after the system wakes up
	 */
	sc->wow_intr_before_sleep = ah->imask;
	ah->imask &= ~ATH9K_INT_GLOBAL;
	ath9k_hw_disable_interrupts(ah);
	ah->imask = ATH9K_INT_BMISS | ATH9K_INT_GLOBAL;
	ath9k_hw_set_interrupts(ah);
	ath9k_hw_enable_interrupts(ah);

	spin_unlock_bh(&sc->sc_pcu_lock);

	/*
	 * we can now sync irq and kill any running tasklets, since we already
	 * disabled interrupts and not holding a spin lock
	 */
	synchronize_irq(sc->irq);
	tasklet_kill(&sc->intr_tq);

	ath9k_hw_wow_enable(ah, wow_triggers_enabled);

	ath9k_ps_restore(sc);
	ath_dbg(common, ANY, "WoW enabled in ath9k\n");
	atomic_inc(&sc->wow_sleep_proc_intr);

fail_wow:
	mutex_unlock(&sc->mutex);
	return ret;
}

static int ath9k_resume(struct ieee80211_hw *hw)
{
	struct ath_softc *sc = hw->priv;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	u32 wow_status;

	mutex_lock(&sc->mutex);

	ath9k_ps_wakeup(sc);

	spin_lock_bh(&sc->sc_pcu_lock);

	ath9k_hw_disable_interrupts(ah);
	ah->imask = sc->wow_intr_before_sleep;
	ath9k_hw_set_interrupts(ah);
	ath9k_hw_enable_interrupts(ah);

	spin_unlock_bh(&sc->sc_pcu_lock);

	wow_status = ath9k_hw_wow_wakeup(ah);

	if (atomic_read(&sc->wow_got_bmiss_intr) == 0) {
		/*
		 * some devices may not pick beacon miss
		 * as the reason they woke up so we add
		 * that here for that shortcoming.
		 */
		wow_status |= AH_WOW_BEACON_MISS;
		atomic_dec(&sc->wow_got_bmiss_intr);
		ath_dbg(common, ANY, "Beacon miss interrupt picked up during WoW sleep\n");
	}

	atomic_dec(&sc->wow_sleep_proc_intr);

	if (wow_status) {
		ath_dbg(common, ANY, "Waking up due to WoW triggers %s with WoW status = %x\n",
			ath9k_hw_wow_event_to_string(wow_status), wow_status);
	}

	ath_restart_work(sc);
	ath9k_start_btcoex(sc);

	ath9k_ps_restore(sc);
	mutex_unlock(&sc->mutex);

	return 0;
}

static void ath9k_set_wakeup(struct ieee80211_hw *hw, bool enabled)
{
	struct ath_softc *sc = hw->priv;

	mutex_lock(&sc->mutex);
	device_init_wakeup(sc->dev, 1);
	device_set_wakeup_enable(sc->dev, enabled);
	mutex_unlock(&sc->mutex);
}

#endif
2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337
static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
{
	struct ath_softc *sc = hw->priv;

	sc->scanning = 1;
}

static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
{
	struct ath_softc *sc = hw->priv;

	sc->scanning = 0;
}
2338

2339
struct ieee80211_ops ath9k_ops = {
2340 2341 2342 2343
	.tx 		    = ath9k_tx,
	.start 		    = ath9k_start,
	.stop 		    = ath9k_stop,
	.add_interface 	    = ath9k_add_interface,
2344
	.change_interface   = ath9k_change_interface,
2345 2346 2347
	.remove_interface   = ath9k_remove_interface,
	.config 	    = ath9k_config,
	.configure_filter   = ath9k_configure_filter,
2348 2349
	.sta_add	    = ath9k_sta_add,
	.sta_remove	    = ath9k_sta_remove,
2350
	.sta_notify         = ath9k_sta_notify,
2351 2352 2353 2354
	.conf_tx 	    = ath9k_conf_tx,
	.bss_info_changed   = ath9k_bss_info_changed,
	.set_key            = ath9k_set_key,
	.get_tsf 	    = ath9k_get_tsf,
2355
	.set_tsf 	    = ath9k_set_tsf,
2356
	.reset_tsf 	    = ath9k_reset_tsf,
2357
	.ampdu_action       = ath9k_ampdu_action,
2358
	.get_survey	    = ath9k_get_survey,
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Johannes Berg 已提交
2359
	.rfkill_poll        = ath9k_rfkill_poll_state,
2360
	.set_coverage_class = ath9k_set_coverage_class,
2361
	.flush		    = ath9k_flush,
2362
	.tx_frames_pending  = ath9k_tx_frames_pending,
2363 2364
	.tx_last_beacon     = ath9k_tx_last_beacon,
	.get_stats	    = ath9k_get_stats,
2365 2366
	.set_antenna	    = ath9k_set_antenna,
	.get_antenna	    = ath9k_get_antenna,
2367

2368 2369 2370 2371 2372 2373
#ifdef CONFIG_PM_SLEEP
	.suspend	    = ath9k_suspend,
	.resume		    = ath9k_resume,
	.set_wakeup	    = ath9k_set_wakeup,
#endif

2374 2375
#ifdef CONFIG_ATH9K_DEBUGFS
	.get_et_sset_count  = ath9k_get_et_sset_count,
2376 2377 2378 2379 2380 2381 2382
	.get_et_stats       = ath9k_get_et_stats,
	.get_et_strings     = ath9k_get_et_strings,
#endif

#if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_DEBUGFS)
	.sta_add_debugfs    = ath9k_sta_add_debugfs,
	.sta_remove_debugfs = ath9k_sta_remove_debugfs,
2383
#endif
2384 2385
	.sw_scan_start	    = ath9k_sw_scan_start,
	.sw_scan_complete   = ath9k_sw_scan_complete,
2386
};