diff options
Diffstat (limited to 'drivers/net/wireless/ath9k/beacon.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/beacon.c | 746 |
1 files changed, 0 insertions, 746 deletions
diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c deleted file mode 100644 index ec995730632d..000000000000 --- a/drivers/net/wireless/ath9k/beacon.c +++ /dev/null @@ -1,746 +0,0 @@ -/* - * Copyright (c) 2008-2009 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 "ath9k.h" - -#define FUDGE 2 - -/* - * 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 int ath_beaconq_config(struct ath_softc *sc) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath9k_tx_queue_info qi; - - ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi); - if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { - /* 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. */ - qi.tqi_aifs = sc->beacon.beacon_qi.tqi_aifs; - qi.tqi_cwmin = 2*sc->beacon.beacon_qi.tqi_cwmin; - qi.tqi_cwmax = sc->beacon.beacon_qi.tqi_cwmax; - } - - if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) { - DPRINTF(sc, ATH_DBG_FATAL, - "unable to update h/w beacon queue parameters\n"); - return 0; - } else { - ath9k_hw_resettxqueue(ah, sc->beacon.beaconq); - return 1; - } -} - -/* - * Associates the beacon frame buffer with a transmit descriptor. Will set - * up all required antenna switch parameters, rate codes, and channel flags. - * Beacons are always sent out at the lowest rate, and are not retried. -*/ -static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp, - struct ath_buf *bf) -{ - struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu; - struct ath_hw *ah = sc->sc_ah; - struct ath_desc *ds; - struct ath9k_11n_rate_series series[4]; - struct ath_rate_table *rt; - int flags, antenna, ctsrate = 0, ctsduration = 0; - u8 rate; - - ds = bf->bf_desc; - flags = ATH9K_TXDESC_NOACK; - - if (((sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) || - (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) && - (ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)) { - ds->ds_link = bf->bf_daddr; /* self-linked */ - flags |= ATH9K_TXDESC_VEOL; - /* Let hardware handle antenna switching. */ - antenna = 0; - } else { - ds->ds_link = 0; - /* - * Switch antenna every beacon. - * Should only switch every beacon period, not for every SWBA - * XXX assumes two antennae - */ - antenna = ((sc->beacon.ast_be_xmit / sc->nbcnvifs) & 1 ? 2 : 1); - } - - ds->ds_data = bf->bf_buf_addr; - - rt = sc->cur_rate_table; - rate = rt->info[0].ratecode; - if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) - rate |= rt->info[0].short_preamble; - - ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN, - ATH9K_PKT_TYPE_BEACON, - MAX_RATE_POWER, - ATH9K_TXKEYIX_INVALID, - ATH9K_KEY_TYPE_CLEAR, - flags); - - /* NB: beacon's BufLen must be a multiple of 4 bytes */ - ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4), - true, true, ds); - - memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); - series[0].Tries = 1; - series[0].Rate = rate; - series[0].ChSel = sc->tx_chainmask; - series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0; - ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration, - series, 4, 0); -} - -static struct ath_buf *ath_beacon_generate(struct ieee80211_hw *hw, - struct ieee80211_vif *vif) -{ - struct ath_wiphy *aphy = hw->priv; - struct ath_softc *sc = aphy->sc; - struct ath_buf *bf; - struct ath_vif *avp; - struct sk_buff *skb; - struct ath_txq *cabq; - struct ieee80211_tx_info *info; - int cabq_depth; - - if (aphy->state != ATH_WIPHY_ACTIVE) - return NULL; - - avp = (void *)vif->drv_priv; - cabq = sc->beacon.cabq; - - if (avp->av_bcbuf == NULL) { - DPRINTF(sc, ATH_DBG_BEACON, "avp=%p av_bcbuf=%p\n", - avp, avp->av_bcbuf); - return NULL; - } - - /* Release the old beacon first */ - - bf = avp->av_bcbuf; - skb = (struct sk_buff *)bf->bf_mpdu; - if (skb) { - dma_unmap_single(sc->dev, bf->bf_dmacontext, - skb->len, DMA_TO_DEVICE); - dev_kfree_skb_any(skb); - } - - /* Get a new beacon from mac80211 */ - - skb = ieee80211_beacon_get(hw, vif); - bf->bf_mpdu = skb; - if (skb == NULL) - return NULL; - ((struct ieee80211_mgmt *)skb->data)->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); - } - - bf->bf_buf_addr = bf->bf_dmacontext = - 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; - DPRINTF(sc, ATH_DBG_FATAL, "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) { - DPRINTF(sc, ATH_DBG_BEACON, - "Flushing previous cabq traffic\n"); - ath_draintxq(sc, cabq, false); - } - } - - ath_beacon_setup(sc, avp, bf); - - while (skb) { - ath_tx_cabq(hw, skb); - skb = ieee80211_get_buffered_bc(hw, vif); - } - - return bf; -} - -/* - * Startup beacon transmission for adhoc mode when they are sent entirely - * by the hardware using the self-linked descriptor + veol trick. -*/ -static void ath_beacon_start_adhoc(struct ath_softc *sc, - struct ieee80211_vif *vif) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath_buf *bf; - struct ath_vif *avp; - struct sk_buff *skb; - - avp = (void *)vif->drv_priv; - - if (avp->av_bcbuf == NULL) - return; - - bf = avp->av_bcbuf; - skb = (struct sk_buff *) bf->bf_mpdu; - - ath_beacon_setup(sc, avp, bf); - - /* NB: caller is known to have already stopped tx dma */ - ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr); - ath9k_hw_txstart(ah, sc->beacon.beaconq); - DPRINTF(sc, ATH_DBG_BEACON, "TXDP%u = %llx (%p)\n", - sc->beacon.beaconq, ito64(bf->bf_daddr), bf->bf_desc); -} - -int ath_beaconq_setup(struct ath_hw *ah) -{ - struct ath9k_tx_queue_info qi; - - memset(&qi, 0, sizeof(qi)); - qi.tqi_aifs = 1; - qi.tqi_cwmin = 0; - qi.tqi_cwmax = 0; - /* NB: don't enable any interrupts */ - return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi); -} - -int ath_beacon_alloc(struct ath_wiphy *aphy, struct ieee80211_vif *vif) -{ - struct ath_softc *sc = aphy->sc; - struct ath_vif *avp; - struct ath_buf *bf; - struct sk_buff *skb; - __le64 tstamp; - - avp = (void *)vif->drv_priv; - - /* Allocate a beacon descriptor if we haven't done so. */ - if (!avp->av_bcbuf) { - /* Allocate beacon state for hostap/ibss. We know - * a buffer is available. */ - avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, - struct ath_buf, list); - list_del(&avp->av_bcbuf->list); - - if (sc->sc_ah->opmode == NL80211_IFTYPE_AP || - !(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)) { - int slot; - /* - * Assign the vif to a beacon xmit slot. As - * above, this cannot fail to find one. - */ - avp->av_bslot = 0; - for (slot = 0; slot < ATH_BCBUF; slot++) - if (sc->beacon.bslot[slot] == NULL) { - /* - * XXX hack, space out slots to better - * deal with misses - */ - if (slot+1 < ATH_BCBUF && - sc->beacon.bslot[slot+1] == NULL) { - avp->av_bslot = slot+1; - break; - } - avp->av_bslot = slot; - /* NB: keep looking for a double slot */ - } - BUG_ON(sc->beacon.bslot[avp->av_bslot] != NULL); - sc->beacon.bslot[avp->av_bslot] = vif; - sc->beacon.bslot_aphy[avp->av_bslot] = aphy; - sc->nbcnvifs++; - } - } - - /* release the previous beacon frame, if it already exists. */ - bf = avp->av_bcbuf; - if (bf->bf_mpdu != NULL) { - skb = (struct sk_buff *)bf->bf_mpdu; - dma_unmap_single(sc->dev, bf->bf_dmacontext, - skb->len, DMA_TO_DEVICE); - dev_kfree_skb_any(skb); - bf->bf_mpdu = NULL; - } - - /* NB: the beacon data buffer must be 32-bit aligned. */ - skb = ieee80211_beacon_get(sc->hw, vif); - if (skb == NULL) { - DPRINTF(sc, ATH_DBG_BEACON, "cannot get skb\n"); - return -ENOMEM; - } - - tstamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp; - sc->beacon.bc_tstamp = le64_to_cpu(tstamp); - /* Calculate a TSF adjustment factor required for staggered beacons. */ - if (avp->av_bslot > 0) { - u64 tsfadjust; - int intval; - - intval = sc->hw->conf.beacon_int ? - sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL; - - /* - * Calculate the TSF offset for this beacon slot, i.e., the - * number of usecs that need to be added to the timestamp field - * in Beacon and Probe Response frames. Beacon slot 0 is - * processed at the correct offset, so it does not require TSF - * adjustment. Other slots are adjusted to get the timestamp - * close to the TBTT for the BSS. - */ - tsfadjust = intval * avp->av_bslot / ATH_BCBUF; - avp->tsf_adjust = cpu_to_le64(TU_TO_USEC(tsfadjust)); - - DPRINTF(sc, ATH_DBG_BEACON, - "stagger beacons, bslot %d intval %u tsfadjust %llu\n", - avp->av_bslot, intval, (unsigned long long)tsfadjust); - - ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp = - avp->tsf_adjust; - } else - avp->tsf_adjust = cpu_to_le64(0); - - bf->bf_mpdu = skb; - bf->bf_buf_addr = bf->bf_dmacontext = - 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; - DPRINTF(sc, ATH_DBG_FATAL, - "dma_mapping_error on beacon alloc\n"); - return -ENOMEM; - } - - return 0; -} - -void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp) -{ - if (avp->av_bcbuf != NULL) { - struct ath_buf *bf; - - if (avp->av_bslot != -1) { - sc->beacon.bslot[avp->av_bslot] = NULL; - sc->beacon.bslot_aphy[avp->av_bslot] = NULL; - sc->nbcnvifs--; - } - - bf = avp->av_bcbuf; - if (bf->bf_mpdu != NULL) { - struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu; - dma_unmap_single(sc->dev, bf->bf_dmacontext, - skb->len, DMA_TO_DEVICE); - dev_kfree_skb_any(skb); - bf->bf_mpdu = NULL; - } - list_add_tail(&bf->list, &sc->beacon.bbuf); - - avp->av_bcbuf = NULL; - } -} - -void ath_beacon_tasklet(unsigned long data) -{ - struct ath_softc *sc = (struct ath_softc *)data; - struct ath_hw *ah = sc->sc_ah; - struct ath_buf *bf = NULL; - struct ieee80211_vif *vif; - struct ath_wiphy *aphy; - int slot; - u32 bfaddr, bc = 0, tsftu; - u64 tsf; - u16 intval; - - /* - * 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++; - - if (sc->beacon.bmisscnt < BSTUCK_THRESH) { - DPRINTF(sc, ATH_DBG_BEACON, - "missed %u consecutive beacons\n", - sc->beacon.bmisscnt); - } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) { - DPRINTF(sc, ATH_DBG_BEACON, - "beacon is officially stuck\n"); - ath_reset(sc, false); - } - - return; - } - - if (sc->beacon.bmisscnt != 0) { - DPRINTF(sc, ATH_DBG_BEACON, - "resume beacon xmit after %u misses\n", - sc->beacon.bmisscnt); - sc->beacon.bmisscnt = 0; - } - - /* - * Generate beacon frames. we are sending frames - * staggered so calculate the slot for this frame based - * on the tsf to safeguard against missing an swba. - */ - - intval = sc->hw->conf.beacon_int ? - sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL; - - tsf = ath9k_hw_gettsf64(ah); - tsftu = TSF_TO_TU(tsf>>32, tsf); - slot = ((tsftu % intval) * ATH_BCBUF) / intval; - /* - * Reverse the slot order to get slot 0 on the TBTT offset that does - * not require TSF adjustment and other slots adding - * slot/ATH_BCBUF * beacon_int to timestamp. For example, with - * ATH_BCBUF = 4, we process beacon slots as follows: 3 2 1 0 3 2 1 .. - * and slot 0 is at correct offset to TBTT. - */ - slot = ATH_BCBUF - slot - 1; - vif = sc->beacon.bslot[slot]; - aphy = sc->beacon.bslot_aphy[slot]; - - DPRINTF(sc, ATH_DBG_BEACON, - "slot %d [tsf %llu tsftu %u intval %u] vif %p\n", - slot, tsf, tsftu, intval, vif); - - bfaddr = 0; - if (vif) { - bf = ath_beacon_generate(aphy->hw, vif); - if (bf != NULL) { - bfaddr = bf->bf_daddr; - bc = 1; - } - } - - /* - * 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; /* commit next beacon */ - sc->beacon.slotupdate = slot; - } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) { - ath9k_hw_setslottime(sc->sc_ah, sc->beacon.slottime); - sc->beacon.updateslot = OK; - } - if (bfaddr != 0) { - /* - * Stop any current dma and put the new frame(s) on the queue. - * This should never fail since we check above that no frames - * are still pending on the queue. - */ - if (!ath9k_hw_stoptxdma(ah, sc->beacon.beaconq)) { - DPRINTF(sc, ATH_DBG_FATAL, - "beacon queue %u did not stop?\n", sc->beacon.beaconq); - } - - /* NB: cabq traffic should already be queued and primed */ - ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bfaddr); - ath9k_hw_txstart(ah, sc->beacon.beaconq); - - sc->beacon.ast_be_xmit += bc; /* XXX per-vif? */ - } -} - -/* - * 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 ath_beacon_config_ap(struct ath_softc *sc, - struct ath_beacon_config *conf, - struct ath_vif *avp) -{ - u32 nexttbtt, intval; - - /* Configure the timers only when the TSF has to be reset */ - - if (!(sc->sc_flags & SC_OP_TSF_RESET)) - return; - - /* NB: the beacon interval is kept internally in TU's */ - intval = conf->beacon_interval & ATH9K_BEACON_PERIOD; - intval /= ATH_BCBUF; /* for staggered beacons */ - nexttbtt = intval; - intval |= ATH9K_BEACON_RESET_TSF; - - /* - * In AP mode we enable the beacon timers and SWBA interrupts to - * prepare beacon frames. - */ - intval |= ATH9K_BEACON_ENA; - sc->imask |= ATH9K_INT_SWBA; - ath_beaconq_config(sc); - - /* Set the computed AP beacon timers */ - - ath9k_hw_set_interrupts(sc->sc_ah, 0); - ath9k_hw_beaconinit(sc->sc_ah, nexttbtt, intval); - sc->beacon.bmisscnt = 0; - ath9k_hw_set_interrupts(sc->sc_ah, sc->imask); - - /* Clear the reset TSF flag, so that subsequent beacon updation - will not reset the HW TSF. */ - - sc->sc_flags &= ~SC_OP_TSF_RESET; -} - -/* - * This sets up the beacon timers according to the timestamp of the last - * received beacon and the current TSF, configures PCF and DTIM - * handling, programs the sleep registers so the hardware will wakeup in - * time to receive beacons, and configures the beacon miss handling so - * we'll receive a BMISS interrupt when we stop seeing beacons from the AP - * we've associated with. - */ -static void ath_beacon_config_sta(struct ath_softc *sc, - struct ath_beacon_config *conf, - struct ath_vif *avp) -{ - struct ath9k_beacon_state bs; - int dtimperiod, dtimcount, sleepduration; - int cfpperiod, cfpcount; - u32 nexttbtt = 0, intval, tsftu; - u64 tsf; - - memset(&bs, 0, sizeof(bs)); - intval = conf->beacon_interval & ATH9K_BEACON_PERIOD; - - /* - * Setup dtim and cfp parameters according to - * last beacon we received (which may be none). - */ - dtimperiod = conf->dtim_period; - if (dtimperiod <= 0) /* NB: 0 if not known */ - dtimperiod = 1; - dtimcount = conf->dtim_count; - if (dtimcount >= dtimperiod) /* NB: sanity check */ - dtimcount = 0; - cfpperiod = 1; /* NB: no PCF support yet */ - cfpcount = 0; - - sleepduration = conf->listen_interval * intval; - if (sleepduration <= 0) - sleepduration = intval; - - /* - * Pull nexttbtt forward to reflect the current - * TSF and calculate dtim+cfp state for the result. - */ - tsf = ath9k_hw_gettsf64(sc->sc_ah); - tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; - do { - nexttbtt += intval; - if (--dtimcount < 0) { - dtimcount = dtimperiod - 1; - if (--cfpcount < 0) - cfpcount = cfpperiod - 1; - } - } while (nexttbtt < tsftu); - - bs.bs_intval = intval; - bs.bs_nexttbtt = nexttbtt; - bs.bs_dtimperiod = dtimperiod*intval; - bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval; - bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod; - bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod; - bs.bs_cfpmaxduration = 0; - - /* - * Calculate the number of consecutive beacons to miss* before taking - * a BMISS interrupt. The configuration is specified in TU so we only - * need calculate based on the beacon interval. Note that we clamp the - * result to at most 15 beacons. - */ - if (sleepduration > intval) { - bs.bs_bmissthreshold = conf->listen_interval * - ATH_DEFAULT_BMISS_LIMIT / 2; - } else { - bs.bs_bmissthreshold = DIV_ROUND_UP(conf->bmiss_timeout, intval); - if (bs.bs_bmissthreshold > 15) - bs.bs_bmissthreshold = 15; - else if (bs.bs_bmissthreshold <= 0) - bs.bs_bmissthreshold = 1; - } - - /* - * Calculate sleep duration. The configuration is given in ms. - * We ensure a multiple of the beacon period is used. Also, if the sleep - * duration is greater than the DTIM period then it makes senses - * to make it a multiple of that. - * - * XXX fixed at 100ms - */ - - bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration); - if (bs.bs_sleepduration > bs.bs_dtimperiod) - bs.bs_sleepduration = bs.bs_dtimperiod; - - /* TSF out of range threshold fixed at 1 second */ - bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD; - - DPRINTF(sc, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu); - DPRINTF(sc, ATH_DBG_BEACON, - "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n", - bs.bs_bmissthreshold, bs.bs_sleepduration, - bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext); - - /* Set the computed STA beacon timers */ - - ath9k_hw_set_interrupts(sc->sc_ah, 0); - ath9k_hw_set_sta_beacon_timers(sc->sc_ah, &bs); - sc->imask |= ATH9K_INT_BMISS; - ath9k_hw_set_interrupts(sc->sc_ah, sc->imask); -} - -static void ath_beacon_config_adhoc(struct ath_softc *sc, - struct ath_beacon_config *conf, - struct ath_vif *avp, - struct ieee80211_vif *vif) -{ - u64 tsf; - u32 tsftu, intval, nexttbtt; - - intval = conf->beacon_interval & ATH9K_BEACON_PERIOD; - - /* Pull nexttbtt forward to reflect the current TSF */ - - nexttbtt = TSF_TO_TU(sc->beacon.bc_tstamp >> 32, sc->beacon.bc_tstamp); - if (nexttbtt == 0) - nexttbtt = intval; - else if (intval) - nexttbtt = roundup(nexttbtt, intval); - - tsf = ath9k_hw_gettsf64(sc->sc_ah); - tsftu = TSF_TO_TU((u32)(tsf>>32), (u32)tsf) + FUDGE; - do { - nexttbtt += intval; - } while (nexttbtt < tsftu); - - DPRINTF(sc, ATH_DBG_BEACON, - "IBSS nexttbtt %u intval %u (%u)\n", - nexttbtt, intval, conf->beacon_interval); - - /* - * In IBSS mode enable the beacon timers but only enable SWBA interrupts - * if we need to manually prepare beacon frames. Otherwise we use a - * self-linked tx descriptor and let the hardware deal with things. - */ - intval |= ATH9K_BEACON_ENA; - if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL)) - sc->imask |= ATH9K_INT_SWBA; - - ath_beaconq_config(sc); - - /* Set the computed ADHOC beacon timers */ - - ath9k_hw_set_interrupts(sc->sc_ah, 0); - ath9k_hw_beaconinit(sc->sc_ah, nexttbtt, intval); - sc->beacon.bmisscnt = 0; - ath9k_hw_set_interrupts(sc->sc_ah, sc->imask); - - if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_VEOL) - ath_beacon_start_adhoc(sc, vif); -} - -void ath_beacon_config(struct ath_softc *sc, struct ieee80211_vif *vif) -{ - struct ath_beacon_config conf; - - /* Setup the beacon configuration parameters */ - - memset(&conf, 0, sizeof(struct ath_beacon_config)); - conf.beacon_interval = sc->hw->conf.beacon_int ? - sc->hw->conf.beacon_int : ATH_DEFAULT_BINTVAL; - conf.listen_interval = 1; - conf.dtim_period = conf.beacon_interval; - conf.dtim_count = 1; - conf.bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf.beacon_interval; - - if (vif) { - struct ath_vif *avp = (struct ath_vif *)vif->drv_priv; - - switch(avp->av_opmode) { - case NL80211_IFTYPE_AP: - ath_beacon_config_ap(sc, &conf, avp); - break; - case NL80211_IFTYPE_ADHOC: - case NL80211_IFTYPE_MESH_POINT: - ath_beacon_config_adhoc(sc, &conf, avp, vif); - break; - case NL80211_IFTYPE_STATION: - ath_beacon_config_sta(sc, &conf, avp); - break; - default: - DPRINTF(sc, ATH_DBG_CONFIG, - "Unsupported beaconing mode\n"); - return; - } - - sc->sc_flags |= SC_OP_BEACONS; - } -} |