| /* |
| * 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 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; |
| info.txpower = 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 void ath9k_beacon_add_noa(struct ath_softc *sc, struct ath_vif *avp, |
| struct sk_buff *skb) |
| { |
| static const u8 noa_ie_hdr[] = { |
| WLAN_EID_VENDOR_SPECIFIC, /* type */ |
| 0, /* length */ |
| 0x50, 0x6f, 0x9a, /* WFA OUI */ |
| 0x09, /* P2P subtype */ |
| 0x0c, /* Notice of Absence */ |
| 0x00, /* LSB of little-endian len */ |
| 0x00, /* MSB of little-endian len */ |
| }; |
| |
| struct ieee80211_p2p_noa_attr *noa; |
| int noa_len, noa_desc, i = 0; |
| u8 *hdr; |
| |
| if (!avp->offchannel_duration && !avp->periodic_noa_duration) |
| return; |
| |
| noa_desc = !!avp->offchannel_duration + !!avp->periodic_noa_duration; |
| noa_len = 2 + sizeof(struct ieee80211_p2p_noa_desc) * noa_desc; |
| |
| hdr = skb_put(skb, sizeof(noa_ie_hdr)); |
| memcpy(hdr, noa_ie_hdr, sizeof(noa_ie_hdr)); |
| hdr[1] = sizeof(noa_ie_hdr) + noa_len - 2; |
| hdr[7] = noa_len; |
| |
| noa = (void *) skb_put(skb, noa_len); |
| memset(noa, 0, noa_len); |
| |
| noa->index = avp->noa_index; |
| if (avp->periodic_noa_duration) { |
| u32 interval = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval); |
| |
| noa->desc[i].count = 255; |
| noa->desc[i].start_time = cpu_to_le32(avp->periodic_noa_start); |
| noa->desc[i].duration = cpu_to_le32(avp->periodic_noa_duration); |
| noa->desc[i].interval = cpu_to_le32(interval); |
| i++; |
| } |
| |
| if (avp->offchannel_duration) { |
| noa->desc[i].count = 1; |
| noa->desc[i].start_time = cpu_to_le32(avp->offchannel_start); |
| noa->desc[i].duration = cpu_to_le32(avp->offchannel_duration); |
| } |
| } |
| |
| 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); |
| if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
| /* |
| * TODO: make sure the seq# gets assigned properly (vs. other |
| * TX frames) |
| */ |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| sc->tx.seq_no += 0x10; |
| hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); |
| } |
| |
| 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->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; |
| |
| 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; |
| 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); |
| |
| if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { |
| if ((vif->type != NL80211_IFTYPE_AP) || |
| (sc->nbcnvifs > 1)) { |
| 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) { |
| if (!bss_conf->enable_beacon && |
| (sc->nbcnvifs <= 1)) { |
| cur_conf->enable_beacon = false; |
| } else if (bss_conf->enable_beacon) { |
| cur_conf->enable_beacon = true; |
| 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; |
| } |
| } |