diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/beacon.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/beacon.c | 718 |
1 files changed, 718 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c new file mode 100644 index 000000000..ee72faac2 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/beacon.c @@ -0,0 +1,718 @@ +/* + * 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 == 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, 0); + 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); + + /* Always assign NOA attr when MCC enabled */ + if (ath9k_is_chanctx_enabled()) + 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; + + 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; + + ath_dbg(common, CONFIG, "Removing interface at beacon slot: %d\n", + avp->av_bslot); + + tasklet_disable(&sc->bcon_tasklet); + + 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; + list_add_tail(&bf->list, &sc->beacon.bbuf); + + tasklet_enable(&sc->bcon_tasklet); +} + +void ath9k_beacon_ensure_primary_slot(struct ath_softc *sc) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ieee80211_vif *vif; + struct ath_vif *avp; + s64 tsfadjust; + u32 offset; + int first_slot = ATH_BCBUF; + int slot; + + tasklet_disable_in_atomic(&sc->bcon_tasklet); + + /* Find first taken slot. */ + for (slot = 0; slot < ATH_BCBUF; slot++) { + if (sc->beacon.bslot[slot]) { + first_slot = slot; + break; + } + } + if (first_slot == 0) + goto out; + + /* Re-enumarate all slots, moving them forward. */ + for (slot = 0; slot < ATH_BCBUF; slot++) { + if (slot + first_slot < ATH_BCBUF) { + vif = sc->beacon.bslot[slot + first_slot]; + sc->beacon.bslot[slot] = vif; + + if (vif) { + avp = (void *)vif->drv_priv; + avp->av_bslot = slot; + } + } else { + sc->beacon.bslot[slot] = NULL; + } + } + + vif = sc->beacon.bslot[0]; + if (WARN_ON(!vif)) + goto out; + + /* Get the tsf_adjust value for the new first slot. */ + avp = (void *)vif->drv_priv; + tsfadjust = le64_to_cpu(avp->tsf_adjust); + + ath_dbg(common, CONFIG, + "Adjusting global TSF after beacon slot reassignment: %lld\n", + (signed long long)tsfadjust); + + /* Modify TSF as required and update the HW. */ + avp->chanctx->tsf_val += tsfadjust; + if (sc->cur_chan == avp->chanctx) { + offset = ath9k_hw_get_tsf_offset(&avp->chanctx->tsf_ts, NULL); + ath9k_hw_settsf64(sc->sc_ah, avp->chanctx->tsf_val + offset); + } + + /* The slots tsf_adjust will be updated by ath9k_beacon_config later. */ + +out: + 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 ath_beacon_config *cur_conf) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + s64 tsfadjust; + int slot; + + for (slot = 0; slot < ATH_BCBUF; slot++) { + struct ath_vif *avp; + + if (!sc->beacon.bslot[slot]) + continue; + + avp = (void *)sc->beacon.bslot[slot]->drv_priv; + + /* tsf_adjust is added to the TSF value. We send out the + * beacon late, so need to adjust the TSF starting point to be + * later in time (i.e. the theoretical first beacon has a TSF + * of 0 after correction). + */ + 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: %lld for bslot: %d\n", + (signed long long)tsfadjust, avp->av_bslot); + } +} + +bool ath9k_csa_is_finished(struct ath_softc *sc, struct ieee80211_vif *vif) +{ + if (!vif || !vif->bss_conf.csa_active) + return false; + + if (!ieee80211_beacon_cntdwn_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(struct tasklet_struct *t) +{ + struct ath_softc *sc = from_tasklet(sc, t, bcon_tasklet); + 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) +{ + struct ath_hw *ah = sc->sc_ah; + + ath9k_hw_disable_interrupts(ah); + ath9k_beaconq_config(sc); + ath9k_hw_beaconinit(ah, nexttbtt, intval); + ah->imask |= ATH9K_INT_SWBA; + sc->beacon.bmisscnt = 0; + ath9k_hw_set_interrupts(ah); + ath9k_hw_enable_interrupts(ah); +} + +static void ath9k_beacon_stop(struct ath_softc *sc) +{ + ath9k_hw_disable_interrupts(sc->sc_ah); + sc->sc_ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS); + sc->beacon.bmisscnt = 0; + ath9k_hw_set_interrupts(sc->sc_ah); + ath9k_hw_enable_interrupts(sc->sc_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); +} + +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); + + /* + * 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 void ath9k_cache_beacon_config(struct ath_softc *sc, + struct ath_chanctx *ctx, + struct ieee80211_vif *vif) +{ + struct ieee80211_bss_conf *bss_conf = &vif->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 = vif->cfg.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; + + ath9k_set_tsfadjust(sc, cur_conf); +} + +void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *main_vif, + bool beacons) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ath_vif *avp; + struct ath_chanctx *ctx; + struct ath_beacon_config *cur_conf; + unsigned long flags; + bool enabled; + bool skip_beacon = false; + + if (!beacons) { + clear_bit(ATH_OP_BEACONS, &common->op_flags); + ath9k_beacon_stop(sc); + return; + } + + if (WARN_ON(!main_vif)) + return; + + avp = (void *)main_vif->drv_priv; + ctx = avp->chanctx; + cur_conf = &ctx->beacon; + enabled = cur_conf->enable_beacon; + cur_conf->enable_beacon = beacons; + + if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) { + ath9k_cache_beacon_config(sc, ctx, main_vif); + + ath9k_set_beacon(sc); + set_bit(ATH_OP_BEACONS, &common->op_flags); + return; + } + + /* Update the beacon configuration. */ + ath9k_cache_beacon_config(sc, ctx, main_vif); + + /* + * Configure the HW beacon registers only when we have a valid + * beacon interval. + */ + if (cur_conf->beacon_interval) { + /* Special case to sync the TSF when joining an existing IBSS. + * This is only done if no AP interface is active. + * Note that mac80211 always resets the TSF when creating a new + * IBSS interface. + */ + if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC && + !enabled && beacons && !main_vif->cfg.ibss_creator) { + 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; + } + + /* + * Do not set the ATH_OP_BEACONS flag for IBSS joiner mode + * here, it is done in ath9k_beacon_config_adhoc(). + */ + if (beacons && !skip_beacon) { + set_bit(ATH_OP_BEACONS, &common->op_flags); + ath9k_set_beacon(sc); + } else { + clear_bit(ATH_OP_BEACONS, &common->op_flags); + ath9k_beacon_stop(sc); + } + } else { + clear_bit(ATH_OP_BEACONS, &common->op_flags); + ath9k_beacon_stop(sc); + } +} + +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; + } +} |