ath9k: Add change_interface callback

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

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 69 insertions, 21 deletions

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index ef87637e4245..ca35aaa7aec6 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1428,13 +1428,78 @@ out:
         return ret;
 }
 
+static void ath9k_reclaim_beacon(struct ath_softc *sc,
+                                 struct ieee80211_vif *vif)
+{
+        struct ath_vif *avp = (void *)vif->drv_priv;
+
+        /* 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);
+        tasklet_kill(&sc->bcon_tasklet);
+        ath9k_ps_restore(sc);
+
+        ath_beacon_return(sc, avp);
+        sc->sc_flags &= ~SC_OP_BEACONS;
+
+        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);
-        struct ath_vif *avp = (void *)vif->drv_priv;
 
         ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
 
@@ -1447,26 +1512,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw,
         /* 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);
-        }
-
-        ath_beacon_return(sc, avp);
-        sc->sc_flags &= ~SC_OP_BEACONS;
-
-        if (sc->nbcnvifs) {
-                /* Re-enable 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_ps_restore(sc);
-        }
+            (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,