--- /dev/null
+/*
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
+ *
+ * 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/dma-mapping.h>
+#include "ath9k.h"
+
+#define FUDGE 2
+
+static void ath9k_reset_beacon_status(struct ath_softc *sc)
+{
+ sc->beacon.tx_processed = false;
+ sc->beacon.tx_last = false;
+}
+
+/*
+ * This function will modify certain transmit queue properties depending on
+ * the operating mode of the station (AP or AdHoc). Parameters are AIFS
+ * settings and channel width min/max
+*/
+static void ath9k_beaconq_config(struct ath_softc *sc)
+{
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_tx_queue_info qi, qi_be;
+ struct ath_txq *txq;
+
+ ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
+
+ if (sc->sc_ah->opmode == NL80211_IFTYPE_AP ||
+ sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) {
+ /* Always burst out beacon and CAB traffic. */
+ qi.tqi_aifs = 1;
+ qi.tqi_cwmin = 0;
+ qi.tqi_cwmax = 0;
+ } else {
+ /* Adhoc mode; important thing is to use 2x cwmin. */
+ txq = sc->tx.txq_map[IEEE80211_AC_BE];
+ ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be);
+ qi.tqi_aifs = qi_be.tqi_aifs;
+ if (ah->slottime == ATH9K_SLOT_TIME_20)
+ qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
+ else
+ qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
+ qi.tqi_cwmax = qi_be.tqi_cwmax;
+ }
+
+ if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
+ ath_err(common, "Unable to update h/w beacon queue parameters\n");
+ } else {
+ ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
+ }
+}
+
+/*
+ * Associates the beacon frame buffer with a transmit descriptor. Will set
+ * up rate codes, and channel flags. Beacons are always sent out at the
+ * lowest rate, and are not retried.
+*/
+static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
+ struct ath_buf *bf, int rateidx)
+{
+ struct sk_buff *skb = bf->bf_mpdu;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath_tx_info info;
+ struct ieee80211_supported_band *sband;
+ u8 chainmask = ah->txchainmask;
+ u8 i, rate = 0;
+
+ sband = &common->sbands[sc->cur_chandef.chan->band];
+ rate = sband->bitrates[rateidx].hw_value;
+ if (vif->bss_conf.use_short_preamble)
+ rate |= sband->bitrates[rateidx].hw_value_short;
+
+ memset(&info, 0, sizeof(info));
+ info.pkt_len = skb->len + FCS_LEN;
+ info.type = ATH9K_PKT_TYPE_BEACON;
+ for (i = 0; i < 4; i++)
+ info.txpower[i] = MAX_RATE_POWER;
+ info.keyix = ATH9K_TXKEYIX_INVALID;
+ info.keytype = ATH9K_KEY_TYPE_CLEAR;
+ info.flags = ATH9K_TXDESC_NOACK | ATH9K_TXDESC_CLRDMASK;
+
+ info.buf_addr[0] = bf->bf_buf_addr;
+ info.buf_len[0] = roundup(skb->len, 4);
+
+ info.is_first = true;
+ info.is_last = true;
+
+ info.qcu = sc->beacon.beaconq;
+
+ info.rates[0].Tries = 1;
+ info.rates[0].Rate = rate;
+ info.rates[0].ChSel = ath_txchainmask_reduction(sc, chainmask, rate);
+
+ ath9k_hw_set_txdesc(ah, bf->bf_desc, &info);
+}
+
+static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct ath_softc *sc = hw->priv;
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_buf *bf;
+ struct ath_vif *avp = (void *)vif->drv_priv;
+ struct sk_buff *skb;
+ struct ath_txq *cabq = sc->beacon.cabq;
+ struct ieee80211_tx_info *info;
+ struct ieee80211_mgmt *mgmt_hdr;
+ int cabq_depth;
+
+ if (avp->av_bcbuf == NULL)
+ return NULL;
+
+ bf = avp->av_bcbuf;
+ skb = bf->bf_mpdu;
+ if (skb) {
+ dma_unmap_single(sc->dev, bf->bf_buf_addr,
+ skb->len, DMA_TO_DEVICE);
+ dev_kfree_skb_any(skb);
+ bf->bf_buf_addr = 0;
+ bf->bf_mpdu = NULL;
+ }
+
+ skb = ieee80211_beacon_get(hw, vif);
+ if (skb == NULL)
+ return NULL;
+
+ bf->bf_mpdu = skb;
+
+ mgmt_hdr = (struct ieee80211_mgmt *)skb->data;
+ mgmt_hdr->u.beacon.timestamp = avp->tsf_adjust;
+
+ info = IEEE80211_SKB_CB(skb);
+
+ ath_assign_seq(common, skb);
+
+ if (vif->p2p)
+ ath9k_beacon_add_noa(sc, avp, skb);
+
+ bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
+ skb->len, DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
+ dev_kfree_skb_any(skb);
+ bf->bf_mpdu = NULL;
+ bf->bf_buf_addr = 0;
+ ath_err(common, "dma_mapping_error on beaconing\n");
+ return NULL;
+ }
+
+ skb = ieee80211_get_buffered_bc(hw, vif);
+
+ /*
+ * if the CABQ traffic from previous DTIM is pending and the current
+ * beacon is also a DTIM.
+ * 1) if there is only one vif let the cab traffic continue.
+ * 2) if there are more than one vif and we are using staggered
+ * beacons, then drain the cabq by dropping all the frames in
+ * the cabq so that the current vifs cab traffic can be scheduled.
+ */
+ spin_lock_bh(&cabq->axq_lock);
+ cabq_depth = cabq->axq_depth;
+ spin_unlock_bh(&cabq->axq_lock);
+
+ if (skb && cabq_depth) {
+ if (sc->cur_chan->nvifs > 1) {
+ ath_dbg(common, BEACON,
+ "Flushing previous cabq traffic\n");
+ ath_draintxq(sc, cabq);
+ }
+ }
+
+ ath9k_beacon_setup(sc, vif, bf, info->control.rates[0].idx);
+
+ if (skb)
+ ath_tx_cabq(hw, vif, skb);
+
+ return bf;
+}
+
+void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_vif *avp = (void *)vif->drv_priv;
+ int slot;
+
+ avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, struct ath_buf, list);
+ list_del(&avp->av_bcbuf->list);
+
+ for (slot = 0; slot < ATH_BCBUF; slot++) {
+ if (sc->beacon.bslot[slot] == NULL) {
+ avp->av_bslot = slot;
+ break;
+ }
+ }
+
+ sc->beacon.bslot[avp->av_bslot] = vif;
+ sc->nbcnvifs++;
+
+ ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
+ avp->av_bslot);
+}
+
+void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_vif *avp = (void *)vif->drv_priv;
+ struct ath_buf *bf = avp->av_bcbuf;
+ struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon;
+
+ ath_dbg(common, CONFIG, "Removing interface at beacon slot: %d\n",
+ avp->av_bslot);
+
+ tasklet_disable(&sc->bcon_tasklet);
+
+ cur_conf->enable_beacon &= ~BIT(avp->av_bslot);
+
+ if (bf && bf->bf_mpdu) {
+ struct sk_buff *skb = bf->bf_mpdu;
+ dma_unmap_single(sc->dev, bf->bf_buf_addr,
+ skb->len, DMA_TO_DEVICE);
+ dev_kfree_skb_any(skb);
+ bf->bf_mpdu = NULL;
+ bf->bf_buf_addr = 0;
+ }
+
+ avp->av_bcbuf = NULL;
+ sc->beacon.bslot[avp->av_bslot] = NULL;
+ sc->nbcnvifs--;
+ list_add_tail(&bf->list, &sc->beacon.bbuf);
+
+ tasklet_enable(&sc->bcon_tasklet);
+}
+
+static int ath9k_beacon_choose_slot(struct ath_softc *sc)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon;
+ u16 intval;
+ u32 tsftu;
+ u64 tsf;
+ int slot;
+
+ if (sc->sc_ah->opmode != NL80211_IFTYPE_AP &&
+ sc->sc_ah->opmode != NL80211_IFTYPE_MESH_POINT) {
+ ath_dbg(common, BEACON, "slot 0, tsf: %llu\n",
+ ath9k_hw_gettsf64(sc->sc_ah));
+ return 0;
+ }
+
+ intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
+ tsf = ath9k_hw_gettsf64(sc->sc_ah);
+ tsf += TU_TO_USEC(sc->sc_ah->config.sw_beacon_response_time);
+ tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
+ slot = (tsftu % (intval * ATH_BCBUF)) / intval;
+
+ ath_dbg(common, BEACON, "slot: %d tsf: %llu tsftu: %u\n",
+ slot, tsf, tsftu / ATH_BCBUF);
+
+ return slot;
+}
+
+static void ath9k_set_tsfadjust(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_vif *avp = (void *)vif->drv_priv;
+ struct ath_beacon_config *cur_conf = &avp->chanctx->beacon;
+ u32 tsfadjust;
+
+ if (avp->av_bslot == 0)
+ return;
+
+ tsfadjust = cur_conf->beacon_interval * avp->av_bslot;
+ tsfadjust = TU_TO_USEC(tsfadjust) / ATH_BCBUF;
+ avp->tsf_adjust = cpu_to_le64(tsfadjust);
+
+ ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n",
+ (unsigned long long)tsfadjust, avp->av_bslot);
+}
+
+bool ath9k_csa_is_finished(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+ if (!vif || !vif->csa_active)
+ return false;
+
+ if (!ieee80211_csa_is_complete(vif))
+ return false;
+
+ ieee80211_csa_finish(vif);
+ return true;
+}
+
+static void ath9k_csa_update_vif(void *data, u8 *mac, struct ieee80211_vif *vif)
+{
+ struct ath_softc *sc = data;
+ ath9k_csa_is_finished(sc, vif);
+}
+
+void ath9k_csa_update(struct ath_softc *sc)
+{
+ ieee80211_iterate_active_interfaces_atomic(sc->hw,
+ IEEE80211_IFACE_ITER_NORMAL,
+ ath9k_csa_update_vif, sc);
+}
+
+void ath9k_beacon_tasklet(unsigned long data)
+{
+ struct ath_softc *sc = (struct ath_softc *)data;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath_buf *bf = NULL;
+ struct ieee80211_vif *vif;
+ bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
+ int slot;
+
+ if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) {
+ ath_dbg(common, RESET,
+ "reset work is pending, skip beaconing now\n");
+ return;
+ }
+
+ /*
+ * Check if the previous beacon has gone out. If
+ * not don't try to post another, skip this period
+ * and wait for the next. Missed beacons indicate
+ * a problem and should not occur. If we miss too
+ * many consecutive beacons reset the device.
+ */
+ if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
+ sc->beacon.bmisscnt++;
+
+ ath9k_hw_check_nav(ah);
+
+ /*
+ * If the previous beacon has not been transmitted
+ * and a MAC/BB hang has been identified, return
+ * here because a chip reset would have been
+ * initiated.
+ */
+ if (!ath_hw_check(sc))
+ return;
+
+ if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
+ ath_dbg(common, BSTUCK,
+ "missed %u consecutive beacons\n",
+ sc->beacon.bmisscnt);
+ ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
+ if (sc->beacon.bmisscnt > 3)
+ ath9k_hw_bstuck_nfcal(ah);
+ } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
+ ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
+ sc->beacon.bmisscnt = 0;
+ ath9k_queue_reset(sc, RESET_TYPE_BEACON_STUCK);
+ }
+
+ return;
+ }
+
+ slot = ath9k_beacon_choose_slot(sc);
+ vif = sc->beacon.bslot[slot];
+
+ /* EDMA devices check that in the tx completion function. */
+ if (!edma) {
+ if (ath9k_is_chanctx_enabled()) {
+ ath_chanctx_beacon_sent_ev(sc,
+ ATH_CHANCTX_EVENT_BEACON_SENT);
+ }
+
+ if (ath9k_csa_is_finished(sc, vif))
+ return;
+ }
+
+ if (!vif || !vif->bss_conf.enable_beacon)
+ return;
+
+ if (ath9k_is_chanctx_enabled()) {
+ ath_chanctx_event(sc, vif, ATH_CHANCTX_EVENT_BEACON_PREPARE);
+ }
+
+ bf = ath9k_beacon_generate(sc->hw, vif);
+
+ if (sc->beacon.bmisscnt != 0) {
+ ath_dbg(common, BSTUCK, "resume beacon xmit after %u misses\n",
+ sc->beacon.bmisscnt);
+ sc->beacon.bmisscnt = 0;
+ }
+
+ /*
+ * Handle slot time change when a non-ERP station joins/leaves
+ * an 11g network. The 802.11 layer notifies us via callback,
+ * we mark updateslot, then wait one beacon before effecting
+ * the change. This gives associated stations at least one
+ * beacon interval to note the state change.
+ *
+ * NB: The slot time change state machine is clocked according
+ * to whether we are bursting or staggering beacons. We
+ * recognize the request to update and record the current
+ * slot then don't transition until that slot is reached
+ * again. If we miss a beacon for that slot then we'll be
+ * slow to transition but we'll be sure at least one beacon
+ * interval has passed. When bursting slot is always left
+ * set to ATH_BCBUF so this check is a noop.
+ */
+ if (sc->beacon.updateslot == UPDATE) {
+ sc->beacon.updateslot = COMMIT;
+ sc->beacon.slotupdate = slot;
+ } else if (sc->beacon.updateslot == COMMIT &&
+ sc->beacon.slotupdate == slot) {
+ ah->slottime = sc->beacon.slottime;
+ ath9k_hw_init_global_settings(ah);
+ sc->beacon.updateslot = OK;
+ }
+
+ if (bf) {
+ ath9k_reset_beacon_status(sc);
+
+ ath_dbg(common, BEACON,
+ "Transmitting beacon for slot: %d\n", slot);
+
+ /* NB: cabq traffic should already be queued and primed */
+ ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
+
+ if (!edma)
+ ath9k_hw_txstart(ah, sc->beacon.beaconq);
+ }
+}
+
+/*
+ * Both nexttbtt and intval have to be in usecs.
+ */
+static void ath9k_beacon_init(struct ath_softc *sc, u32 nexttbtt,
+ u32 intval, bool reset_tsf)
+{
+ struct ath_hw *ah = sc->sc_ah;
+
+ ath9k_hw_disable_interrupts(ah);
+ if (reset_tsf)
+ ath9k_hw_reset_tsf(ah);
+ ath9k_beaconq_config(sc);
+ ath9k_hw_beaconinit(ah, nexttbtt, intval);
+ sc->beacon.bmisscnt = 0;
+ ath9k_hw_set_interrupts(ah);
+ ath9k_hw_enable_interrupts(ah);
+}
+
+/*
+ * For multi-bss ap support beacons are either staggered evenly over N slots or
+ * burst together. For the former arrange for the SWBA to be delivered for each
+ * slot. Slots that are not occupied will generate nothing.
+ */
+static void ath9k_beacon_config_ap(struct ath_softc *sc,
+ struct ath_beacon_config *conf)
+{
+ struct ath_hw *ah = sc->sc_ah;
+
+ ath9k_cmn_beacon_config_ap(ah, conf, ATH_BCBUF);
+ ath9k_beacon_init(sc, conf->nexttbtt, conf->intval, false);
+}
+
+static void ath9k_beacon_config_sta(struct ath_hw *ah,
+ struct ath_beacon_config *conf)
+{
+ struct ath9k_beacon_state bs;
+
+ if (ath9k_cmn_beacon_config_sta(ah, conf, &bs) == -EPERM)
+ return;
+
+ ath9k_hw_disable_interrupts(ah);
+ ath9k_hw_set_sta_beacon_timers(ah, &bs);
+ ah->imask |= ATH9K_INT_BMISS;
+
+ ath9k_hw_set_interrupts(ah);
+ ath9k_hw_enable_interrupts(ah);
+}
+
+static void ath9k_beacon_config_adhoc(struct ath_softc *sc,
+ struct ath_beacon_config *conf)
+{
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ ath9k_reset_beacon_status(sc);
+
+ ath9k_cmn_beacon_config_adhoc(ah, conf);
+
+ ath9k_beacon_init(sc, conf->nexttbtt, conf->intval, conf->ibss_creator);
+
+ /*
+ * Set the global 'beacon has been configured' flag for the
+ * joiner case in IBSS mode.
+ */
+ if (!conf->ibss_creator && conf->enable_beacon)
+ set_bit(ATH_OP_BEACONS, &common->op_flags);
+}
+
+static bool ath9k_allow_beacon_config(struct ath_softc *sc,
+ struct ieee80211_vif *vif)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_vif *avp = (void *)vif->drv_priv;
+
+ if (ath9k_is_chanctx_enabled()) {
+ /*
+ * If the VIF is not present in the current channel context,
+ * then we can't do the usual opmode checks. Allow the
+ * beacon config for the VIF to be updated in this case and
+ * return immediately.
+ */
+ if (sc->cur_chan != avp->chanctx)
+ return true;
+ }
+
+ if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) {
+ if (vif->type != NL80211_IFTYPE_AP) {
+ ath_dbg(common, CONFIG,
+ "An AP interface is already present !\n");
+ return false;
+ }
+ }
+
+ if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) {
+ if ((vif->type == NL80211_IFTYPE_STATION) &&
+ test_bit(ATH_OP_BEACONS, &common->op_flags) &&
+ vif != sc->cur_chan->primary_sta) {
+ ath_dbg(common, CONFIG,
+ "Beacon already configured for a station interface\n");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static void ath9k_cache_beacon_config(struct ath_softc *sc,
+ struct ath_chanctx *ctx,
+ struct ieee80211_bss_conf *bss_conf)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_beacon_config *cur_conf = &ctx->beacon;
+
+ ath_dbg(common, BEACON,
+ "Caching beacon data for BSS: %pM\n", bss_conf->bssid);
+
+ cur_conf->beacon_interval = bss_conf->beacon_int;
+ cur_conf->dtim_period = bss_conf->dtim_period;
+ cur_conf->dtim_count = 1;
+ cur_conf->ibss_creator = bss_conf->ibss_creator;
+
+ /*
+ * It looks like mac80211 may end up using beacon interval of zero in
+ * some cases (at least for mesh point). Avoid getting into an
+ * infinite loop by using a bit safer value instead. To be safe,
+ * do sanity check on beacon interval for all operating modes.
+ */
+ if (cur_conf->beacon_interval == 0)
+ cur_conf->beacon_interval = 100;
+
+ cur_conf->bmiss_timeout =
+ ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
+
+ /*
+ * We don't parse dtim period from mac80211 during the driver
+ * initialization as it breaks association with hidden-ssid
+ * AP and it causes latency in roaming
+ */
+ if (cur_conf->dtim_period == 0)
+ cur_conf->dtim_period = 1;
+
+}
+
+void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif,
+ u32 changed)
+{
+ struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath_vif *avp = (void *)vif->drv_priv;
+ struct ath_chanctx *ctx = avp->chanctx;
+ struct ath_beacon_config *cur_conf;
+ unsigned long flags;
+ bool skip_beacon = false;
+
+ if (!ctx)
+ return;
+
+ cur_conf = &avp->chanctx->beacon;
+ if (vif->type == NL80211_IFTYPE_AP)
+ ath9k_set_tsfadjust(sc, vif);
+
+ if (!ath9k_allow_beacon_config(sc, vif))
+ return;
+
+ if (vif->type == NL80211_IFTYPE_STATION) {
+ ath9k_cache_beacon_config(sc, ctx, bss_conf);
+ if (ctx != sc->cur_chan)
+ return;
+
+ ath9k_set_beacon(sc);
+ set_bit(ATH_OP_BEACONS, &common->op_flags);
+ return;
+ }
+
+ /*
+ * Take care of multiple interfaces when
+ * enabling/disabling SWBA.
+ */
+ if (changed & BSS_CHANGED_BEACON_ENABLED) {
+ bool enabled = cur_conf->enable_beacon;
+
+ if (!bss_conf->enable_beacon) {
+ cur_conf->enable_beacon &= ~BIT(avp->av_bslot);
+ } else {
+ cur_conf->enable_beacon |= BIT(avp->av_bslot);
+ if (!enabled)
+ ath9k_cache_beacon_config(sc, ctx, bss_conf);
+ }
+ }
+
+ if (ctx != sc->cur_chan)
+ return;
+
+ /*
+ * Configure the HW beacon registers only when we have a valid
+ * beacon interval.
+ */
+ if (cur_conf->beacon_interval) {
+ /*
+ * If we are joining an existing IBSS network, start beaconing
+ * only after a TSF-sync has taken place. Ensure that this
+ * happens by setting the appropriate flags.
+ */
+ if ((changed & BSS_CHANGED_IBSS) && !bss_conf->ibss_creator &&
+ bss_conf->enable_beacon) {
+ 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);
+ skip_beacon = true;
+ } else {
+ ath9k_set_beacon(sc);
+ }
+
+ /*
+ * Do not set the ATH_OP_BEACONS flag for IBSS joiner mode
+ * here, it is done in ath9k_beacon_config_adhoc().
+ */
+ if (cur_conf->enable_beacon && !skip_beacon)
+ set_bit(ATH_OP_BEACONS, &common->op_flags);
+ else
+ clear_bit(ATH_OP_BEACONS, &common->op_flags);
+ }
+}
+
+void ath9k_set_beacon(struct ath_softc *sc)
+{
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon;
+
+ switch (sc->sc_ah->opmode) {
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_MESH_POINT:
+ ath9k_beacon_config_ap(sc, cur_conf);
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ ath9k_beacon_config_adhoc(sc, cur_conf);
+ break;
+ case NL80211_IFTYPE_STATION:
+ ath9k_beacon_config_sta(sc->sc_ah, cur_conf);
+ break;
+ default:
+ ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
+ return;
+ }
+}
Code Review / kvmfornfv.git / blobdiff