mirror of https://gitee.com/openkylin/linux.git
ath9k: Fix beacon setup
This patch revamps interface addition and deletion and simplifies slot allocation. There is no need to setup the beacon buffer in add/remove interface, remove this and use simple APIs for assigning/deleting slots. Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -416,8 +416,8 @@ struct ath_beacon {
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void ath_beacon_tasklet(unsigned long data);
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void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif);
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int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif);
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void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp);
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void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif);
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void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif);
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int ath_beaconq_config(struct ath_softc *sc);
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void ath_set_beacon(struct ath_softc *sc);
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void ath9k_set_beaconing_status(struct ath_softc *sc, bool status);
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@ -222,51 +222,43 @@ static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw,
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return bf;
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}
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int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif)
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void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
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{
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struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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struct ath_vif *avp;
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struct ath_buf *bf;
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struct sk_buff *skb;
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struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf;
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__le64 tstamp;
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struct ath_vif *avp = (void *)vif->drv_priv;
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int slot;
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avp = (void *)vif->drv_priv;
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avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, struct ath_buf, list);
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list_del(&avp->av_bcbuf->list);
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/* Allocate a beacon descriptor if we haven't done so. */
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if (!avp->av_bcbuf) {
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/* Allocate beacon state for hostap/ibss. We know
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* a buffer is available. */
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avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf,
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struct ath_buf, list);
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list_del(&avp->av_bcbuf->list);
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if (ath9k_uses_beacons(vif->type)) {
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int slot;
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/*
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* Assign the vif to a beacon xmit slot. As
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* above, this cannot fail to find one.
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*/
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avp->av_bslot = 0;
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for (slot = 0; slot < ATH_BCBUF; slot++)
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if (sc->beacon.bslot[slot] == NULL) {
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avp->av_bslot = slot;
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avp->is_bslot_active = false;
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/* NB: keep looking for a double slot */
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if (slot == 0 || !sc->beacon.bslot[slot-1])
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break;
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}
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BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL);
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sc->beacon.bslot[avp->av_bslot] = vif;
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sc->nbcnvifs++;
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for (slot = 0; slot < ATH_BCBUF; slot++) {
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if (sc->beacon.bslot[slot] == NULL) {
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avp->av_bslot = slot;
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avp->is_bslot_active = false;
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break;
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}
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}
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/* release the previous beacon frame, if it already exists. */
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bf = avp->av_bcbuf;
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if (bf->bf_mpdu != NULL) {
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skb = bf->bf_mpdu;
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sc->beacon.bslot[avp->av_bslot] = vif;
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sc->nbcnvifs++;
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ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
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avp->av_bslot);
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}
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void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
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{
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struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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struct ath_vif *avp = (void *)vif->drv_priv;
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struct ath_buf *bf = avp->av_bcbuf;
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ath_dbg(common, CONFIG, "Removing interface at beacon slot: %d\n",
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avp->av_bslot);
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tasklet_disable(&sc->bcon_tasklet);
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if (bf && bf->bf_mpdu) {
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struct sk_buff *skb = bf->bf_mpdu;
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dma_unmap_single(sc->dev, bf->bf_buf_addr,
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skb->len, DMA_TO_DEVICE);
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dev_kfree_skb_any(skb);
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@ -274,80 +266,13 @@ int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_vif *vif)
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bf->bf_buf_addr = 0;
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}
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/* NB: the beacon data buffer must be 32-bit aligned. */
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skb = ieee80211_beacon_get(sc->hw, vif);
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if (skb == NULL)
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return -ENOMEM;
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avp->av_bcbuf = NULL;
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avp->is_bslot_active = false;
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sc->beacon.bslot[avp->av_bslot] = NULL;
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sc->nbcnvifs--;
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list_add_tail(&bf->list, &sc->beacon.bbuf);
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tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
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sc->beacon.bc_tstamp = (u32) le64_to_cpu(tstamp);
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/* Calculate a TSF adjustment factor required for staggered beacons. */
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if (avp->av_bslot > 0) {
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u64 tsfadjust;
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int intval;
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intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
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/*
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* Calculate the TSF offset for this beacon slot, i.e., the
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* number of usecs that need to be added to the timestamp field
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* in Beacon and Probe Response frames. Beacon slot 0 is
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* processed at the correct offset, so it does not require TSF
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* adjustment. Other slots are adjusted to get the timestamp
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* close to the TBTT for the BSS.
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*/
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tsfadjust = TU_TO_USEC(intval * avp->av_bslot) / ATH_BCBUF;
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avp->tsf_adjust = cpu_to_le64(tsfadjust);
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ath_dbg(common, BEACON,
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"stagger beacons, bslot %d intval %u tsfadjust %llu\n",
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avp->av_bslot, intval, (unsigned long long)tsfadjust);
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((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp =
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avp->tsf_adjust;
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} else
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avp->tsf_adjust = cpu_to_le64(0);
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bf->bf_mpdu = skb;
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bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
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skb->len, DMA_TO_DEVICE);
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if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
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dev_kfree_skb_any(skb);
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bf->bf_mpdu = NULL;
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bf->bf_buf_addr = 0;
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ath_err(common, "dma_mapping_error on beacon alloc\n");
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return -ENOMEM;
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}
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avp->is_bslot_active = true;
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return 0;
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}
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void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp)
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{
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if (avp->av_bcbuf != NULL) {
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struct ath_buf *bf;
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avp->is_bslot_active = false;
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if (avp->av_bslot != -1) {
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sc->beacon.bslot[avp->av_bslot] = NULL;
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sc->nbcnvifs--;
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avp->av_bslot = -1;
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}
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bf = avp->av_bcbuf;
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if (bf->bf_mpdu != NULL) {
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struct sk_buff *skb = bf->bf_mpdu;
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dma_unmap_single(sc->dev, bf->bf_buf_addr,
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skb->len, DMA_TO_DEVICE);
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dev_kfree_skb_any(skb);
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bf->bf_mpdu = NULL;
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bf->bf_buf_addr = 0;
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}
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list_add_tail(&bf->list, &sc->beacon.bbuf);
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avp->av_bcbuf = NULL;
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}
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tasklet_enable(&sc->bcon_tasklet);
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}
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void ath_beacon_tasklet(unsigned long data)
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@ -852,16 +852,6 @@ bool ath9k_uses_beacons(int type)
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}
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}
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static void ath9k_reclaim_beacon(struct ath_softc *sc,
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struct ieee80211_vif *vif)
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{
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struct ath_vif *avp = (void *)vif->drv_priv;
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ath9k_set_beaconing_status(sc, false);
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ath_beacon_return(sc, avp);
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ath9k_set_beaconing_status(sc, true);
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}
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static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
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{
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struct ath9k_vif_iter_data *iter_data = data;
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@ -977,22 +967,6 @@ static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
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}
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}
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/* Called with sc->mutex held, vif counts set up properly. */
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static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif)
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{
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struct ath_softc *sc = hw->priv;
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ath9k_calculate_summary_state(hw, vif);
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if (ath9k_uses_beacons(vif->type)) {
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/* Reserve a beacon slot for the vif */
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ath9k_set_beaconing_status(sc, false);
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ath_beacon_alloc(sc, vif);
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ath9k_set_beaconing_status(sc, true);
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}
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}
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static int ath9k_add_interface(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif)
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{
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@ -1032,7 +1006,10 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
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sc->nvifs++;
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ath9k_do_vif_add_setup(hw, vif);
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ath9k_calculate_summary_state(hw, vif);
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if (ath9k_uses_beacons(vif->type))
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ath9k_beacon_assign_slot(sc, vif);
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out:
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mutex_unlock(&sc->mutex);
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ath9k_ps_restore(sc);
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@ -1049,6 +1026,7 @@ static int ath9k_change_interface(struct ieee80211_hw *hw,
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int ret = 0;
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ath_dbg(common, CONFIG, "Change Interface\n");
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mutex_lock(&sc->mutex);
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ath9k_ps_wakeup(sc);
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@ -1061,15 +1039,16 @@ static int ath9k_change_interface(struct ieee80211_hw *hw,
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}
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}
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/* Clean up old vif stuff */
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if (ath9k_uses_beacons(vif->type))
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ath9k_reclaim_beacon(sc, vif);
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ath9k_beacon_remove_slot(sc, vif);
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/* Add new settings */
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vif->type = new_type;
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vif->p2p = p2p;
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ath9k_do_vif_add_setup(hw, vif);
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ath9k_calculate_summary_state(hw, vif);
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if (ath9k_uses_beacons(vif->type))
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ath9k_beacon_assign_slot(sc, vif);
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out:
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ath9k_ps_restore(sc);
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mutex_unlock(&sc->mutex);
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@ -1089,9 +1068,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw,
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sc->nvifs--;
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/* Reclaim beacon resources */
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if (ath9k_uses_beacons(vif->type))
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ath9k_reclaim_beacon(sc, vif);
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ath9k_beacon_remove_slot(sc, vif);
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ath9k_calculate_summary_state(hw, NULL);
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@ -1610,9 +1588,7 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
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(changed & BSS_CHANGED_BEACON_ENABLED) ||
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(changed & BSS_CHANGED_BEACON_INT))) {
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ath9k_set_beaconing_status(sc, false);
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if (bss_conf->enable_beacon)
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ath_beacon_alloc(sc, vif);
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else
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if (!bss_conf->enable_beacon)
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avp->is_bslot_active = false;
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ath_beacon_config(sc, vif);
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ath9k_set_beaconing_status(sc, true);
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