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Commit 6b3b991d authored by Rajkumar Manoharan's avatar Rajkumar Manoharan Committed by John W. Linville
Browse files

ath9k: Add change_interface callback 



Add support to change interface type
without bringing down the interface.

Signed-off-by: default avatarRajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent a7ffac95

drivers/net/wireless/ath/ath9k/main.c

+69 −21
Original line number Diff line number Diff line
@@ -1428,45 +1428,92 @@ static int ath9k_add_interface(struct ieee80211_hw *hw, 
	return ret;

}



static void ath9k_remove_interface(struct ieee80211_hw *hw,

static void ath9k_reclaim_beacon(struct ath_softc *sc,

				 struct ieee80211_vif *vif)

{

	struct ath_wiphy *aphy = hw->priv;

	struct ath_softc *sc = aphy->sc;

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	struct ath_vif *avp = (void *)vif->drv_priv;



	ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");



	mutex_lock(&sc->mutex);



	/* Stop ANI */

	sc->sc_flags &= ~SC_OP_ANI_RUN;

	del_timer_sync(&common->ani.timer);



	/* Reclaim beacon resources */

	if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||

	    (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||

	    (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {

	/* Disable SWBA interrupt */

	sc->sc_ah->imask &= ~ATH9K_INT_SWBA;

	ath9k_ps_wakeup(sc);

	ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);

	ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);

		ath9k_ps_restore(sc);

	tasklet_kill(&sc->bcon_tasklet);

	}

	ath9k_ps_restore(sc);



	ath_beacon_return(sc, avp);

	sc->sc_flags &= ~SC_OP_BEACONS;



	if (sc->nbcnvifs) {

		/* Re-enable SWBA interrupt */

	if (sc->nbcnvifs > 0) {

		/* Re-enable beaconing */

		sc->sc_ah->imask |= ATH9K_INT_SWBA;

		ath9k_ps_wakeup(sc);

		ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_ah->imask);

		ath9k_ps_restore(sc);

	}

}



static int ath9k_change_interface(struct ieee80211_hw *hw,

				  struct ieee80211_vif *vif,

				  enum nl80211_iftype new_type,

				  bool p2p)

{

	struct ath_wiphy *aphy = hw->priv;

	struct ath_softc *sc = aphy->sc;

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);



	ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");

	mutex_lock(&sc->mutex);



	switch (new_type) {

	case NL80211_IFTYPE_AP:

	case NL80211_IFTYPE_ADHOC:

		if (sc->nbcnvifs >= ATH_BCBUF) {

			ath_err(common, "No beacon slot available\n");

			return -ENOBUFS;

		}

		break;

	case NL80211_IFTYPE_STATION:

		/* Stop ANI */

		sc->sc_flags &= ~SC_OP_ANI_RUN;

		del_timer_sync(&common->ani.timer);

		if ((vif->type == NL80211_IFTYPE_AP) ||

		    (vif->type == NL80211_IFTYPE_ADHOC))

			ath9k_reclaim_beacon(sc, vif);

		break;

	default:

		ath_err(common, "Interface type %d not yet supported\n",

				vif->type);

		mutex_unlock(&sc->mutex);

		return -ENOTSUPP;

	}

	vif->type = new_type;

	vif->p2p = p2p;



	mutex_unlock(&sc->mutex);

	return 0;

}



static void ath9k_remove_interface(struct ieee80211_hw *hw,

				   struct ieee80211_vif *vif)

{

	struct ath_wiphy *aphy = hw->priv;

	struct ath_softc *sc = aphy->sc;

	struct ath_common *common = ath9k_hw_common(sc->sc_ah);



	ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");



	mutex_lock(&sc->mutex);



	/* Stop ANI */

	sc->sc_flags &= ~SC_OP_ANI_RUN;

	del_timer_sync(&common->ani.timer);



	/* Reclaim beacon resources */

	if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||

	    (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||

	    (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT))

		ath9k_reclaim_beacon(sc, vif);



	sc->nvifs--;
@@ -2111,6 +2158,7 @@ struct ieee80211_ops ath9k_ops = { 
	.start 		    = ath9k_start,

	.stop 		    = ath9k_stop,

	.add_interface 	    = ath9k_add_interface,

	.change_interface   = ath9k_change_interface,

	.remove_interface   = ath9k_remove_interface,

	.config 	    = ath9k_config,

	.configure_filter   = ath9k_configure_filter,