Date: Sun, 20 May 2012 04:14:30 +0000 (UTC) From: Adrian Chadd <adrian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r235680 - in head/sys: conf dev/ath modules/ath Message-ID: <201205200414.q4K4EUHd065946@svn.freebsd.org>
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Author: adrian Date: Sun May 20 04:14:29 2012 New Revision: 235680 URL: http://svn.freebsd.org/changeset/base/235680 Log: Migrate most of the beacon handling functions out to if_ath_beacon.c. This is also in preparation for supporting AR9300 and later NICs. Added: head/sys/dev/ath/if_ath_beacon.c (contents, props changed) Modified: head/sys/conf/files head/sys/dev/ath/if_ath.c head/sys/dev/ath/if_ath_beacon.h head/sys/dev/ath/if_ath_misc.h head/sys/modules/ath/Makefile Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Sun May 20 02:49:42 2012 (r235679) +++ head/sys/conf/files Sun May 20 04:14:29 2012 (r235680) @@ -710,6 +710,8 @@ dev/ath/if_ath_ahb.c optional ath_ahb \ # dev/ath/if_ath.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" +dev/ath/if_ath_beacon.c optional ath \ + compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_debug.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_keycache.c optional ath \ Modified: head/sys/dev/ath/if_ath.c ============================================================================== --- head/sys/dev/ath/if_ath.c Sun May 20 02:49:42 2012 (r235679) +++ head/sys/dev/ath/if_ath.c Sun May 20 04:14:29 2012 (r235680) @@ -153,17 +153,9 @@ static void ath_key_update_begin(struct static void ath_key_update_end(struct ieee80211vap *); static void ath_update_mcast(struct ifnet *); static void ath_update_promisc(struct ifnet *); -static void ath_setslottime(struct ath_softc *); static void ath_updateslot(struct ifnet *); -static int ath_beaconq_setup(struct ath_hal *); -static int ath_beacon_alloc(struct ath_softc *, struct ieee80211_node *); -static void ath_beacon_update(struct ieee80211vap *, int item); -static void ath_beacon_setup(struct ath_softc *, struct ath_buf *); -static void ath_beacon_proc(void *, int); static void ath_bstuck_proc(void *, int); static void ath_reset_proc(void *, int); -static void ath_beacon_return(struct ath_softc *, struct ath_buf *); -static void ath_beacon_free(struct ath_softc *); static void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *, ath_bufhead *); static int ath_desc_alloc(struct ath_softc *); @@ -2541,7 +2533,7 @@ ath_mode_init(struct ath_softc *sc) /* * Set the slot time based on the current setting. */ -static void +void ath_setslottime(struct ath_softc *sc) { struct ieee80211com *ic = sc->sc_ifp->if_l2com; @@ -2594,248 +2586,10 @@ ath_updateslot(struct ifnet *ifp) } /* - * Setup a h/w transmit queue for beacons. - */ -static int -ath_beaconq_setup(struct ath_hal *ah) -{ - HAL_TXQ_INFO qi; - - memset(&qi, 0, sizeof(qi)); - qi.tqi_aifs = HAL_TXQ_USEDEFAULT; - qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; - qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; - /* NB: for dynamic turbo, don't enable any other interrupts */ - qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE; - return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi); -} - -/* - * Setup the transmit queue parameters for the beacon queue. - */ -int -ath_beaconq_config(struct ath_softc *sc) -{ -#define ATH_EXPONENT_TO_VALUE(v) ((1<<(v))-1) - struct ieee80211com *ic = sc->sc_ifp->if_l2com; - struct ath_hal *ah = sc->sc_ah; - HAL_TXQ_INFO qi; - - ath_hal_gettxqueueprops(ah, sc->sc_bhalq, &qi); - if (ic->ic_opmode == IEEE80211_M_HOSTAP || - ic->ic_opmode == IEEE80211_M_MBSS) { - /* - * Always burst out beacon and CAB traffic. - */ - qi.tqi_aifs = ATH_BEACON_AIFS_DEFAULT; - qi.tqi_cwmin = ATH_BEACON_CWMIN_DEFAULT; - qi.tqi_cwmax = ATH_BEACON_CWMAX_DEFAULT; - } else { - struct wmeParams *wmep = - &ic->ic_wme.wme_chanParams.cap_wmeParams[WME_AC_BE]; - /* - * Adhoc mode; important thing is to use 2x cwmin. - */ - qi.tqi_aifs = wmep->wmep_aifsn; - qi.tqi_cwmin = 2*ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); - qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); - } - - if (!ath_hal_settxqueueprops(ah, sc->sc_bhalq, &qi)) { - device_printf(sc->sc_dev, "unable to update parameters for " - "beacon hardware queue!\n"); - return 0; - } else { - ath_hal_resettxqueue(ah, sc->sc_bhalq); /* push to h/w */ - return 1; - } -#undef ATH_EXPONENT_TO_VALUE -} - -/* - * Allocate and setup an initial beacon frame. - */ -static int -ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni) -{ - struct ieee80211vap *vap = ni->ni_vap; - struct ath_vap *avp = ATH_VAP(vap); - struct ath_buf *bf; - struct mbuf *m; - int error; - - bf = avp->av_bcbuf; - DPRINTF(sc, ATH_DEBUG_NODE, "%s: bf_m=%p, bf_node=%p\n", - __func__, bf->bf_m, bf->bf_node); - if (bf->bf_m != NULL) { - bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); - m_freem(bf->bf_m); - bf->bf_m = NULL; - } - if (bf->bf_node != NULL) { - ieee80211_free_node(bf->bf_node); - bf->bf_node = NULL; - } - - /* - * NB: the beacon data buffer must be 32-bit aligned; - * we assume the mbuf routines will return us something - * with this alignment (perhaps should assert). - */ - m = ieee80211_beacon_alloc(ni, &avp->av_boff); - if (m == NULL) { - device_printf(sc->sc_dev, "%s: cannot get mbuf\n", __func__); - sc->sc_stats.ast_be_nombuf++; - return ENOMEM; - } - error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, - bf->bf_segs, &bf->bf_nseg, - BUS_DMA_NOWAIT); - if (error != 0) { - device_printf(sc->sc_dev, - "%s: cannot map mbuf, bus_dmamap_load_mbuf_sg returns %d\n", - __func__, error); - m_freem(m); - return error; - } - - /* - * Calculate a TSF adjustment factor required for staggered - * beacons. Note that we assume the format of the beacon - * frame leaves the tstamp field immediately following the - * header. - */ - if (sc->sc_stagbeacons && avp->av_bslot > 0) { - uint64_t tsfadjust; - struct ieee80211_frame *wh; - - /* - * The beacon interval is in TU's; the TSF is in usecs. - * We figure out how many TU's to add to align the timestamp - * then convert to TSF units and handle byte swapping before - * inserting it in the frame. The hardware will then add this - * each time a beacon frame is sent. Note that we align vap's - * 1..N and leave vap 0 untouched. This means vap 0 has a - * timestamp in one beacon interval while the others get a - * timstamp aligned to the next interval. - */ - tsfadjust = ni->ni_intval * - (ATH_BCBUF - avp->av_bslot) / ATH_BCBUF; - tsfadjust = htole64(tsfadjust << 10); /* TU -> TSF */ - - DPRINTF(sc, ATH_DEBUG_BEACON, - "%s: %s beacons bslot %d intval %u tsfadjust %llu\n", - __func__, sc->sc_stagbeacons ? "stagger" : "burst", - avp->av_bslot, ni->ni_intval, - (long long unsigned) le64toh(tsfadjust)); - - wh = mtod(m, struct ieee80211_frame *); - memcpy(&wh[1], &tsfadjust, sizeof(tsfadjust)); - } - bf->bf_m = m; - bf->bf_node = ieee80211_ref_node(ni); - - return 0; -} - -/* - * Setup the beacon frame for transmit. - */ -static void -ath_beacon_setup(struct ath_softc *sc, struct ath_buf *bf) -{ -#define USE_SHPREAMBLE(_ic) \ - (((_ic)->ic_flags & (IEEE80211_F_SHPREAMBLE | IEEE80211_F_USEBARKER))\ - == IEEE80211_F_SHPREAMBLE) - struct ieee80211_node *ni = bf->bf_node; - struct ieee80211com *ic = ni->ni_ic; - struct mbuf *m = bf->bf_m; - struct ath_hal *ah = sc->sc_ah; - struct ath_desc *ds; - int flags, antenna; - const HAL_RATE_TABLE *rt; - u_int8_t rix, rate; - - DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: m %p len %u\n", - __func__, m, m->m_len); - - /* setup descriptors */ - ds = bf->bf_desc; - bf->bf_last = bf; - bf->bf_lastds = ds; - - flags = HAL_TXDESC_NOACK; - if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) { - ds->ds_link = bf->bf_daddr; /* self-linked */ - flags |= HAL_TXDESC_VEOL; - /* - * Let hardware handle antenna switching. - */ - antenna = sc->sc_txantenna; - } else { - ds->ds_link = 0; - /* - * Switch antenna every 4 beacons. - * XXX assumes two antenna - */ - if (sc->sc_txantenna != 0) - antenna = sc->sc_txantenna; - else if (sc->sc_stagbeacons && sc->sc_nbcnvaps != 0) - antenna = ((sc->sc_stats.ast_be_xmit / sc->sc_nbcnvaps) & 4 ? 2 : 1); - else - antenna = (sc->sc_stats.ast_be_xmit & 4 ? 2 : 1); - } - - KASSERT(bf->bf_nseg == 1, - ("multi-segment beacon frame; nseg %u", bf->bf_nseg)); - ds->ds_data = bf->bf_segs[0].ds_addr; - /* - * Calculate rate code. - * XXX everything at min xmit rate - */ - rix = 0; - rt = sc->sc_currates; - rate = rt->info[rix].rateCode; - if (USE_SHPREAMBLE(ic)) - rate |= rt->info[rix].shortPreamble; - ath_hal_setuptxdesc(ah, ds - , m->m_len + IEEE80211_CRC_LEN /* frame length */ - , sizeof(struct ieee80211_frame)/* header length */ - , HAL_PKT_TYPE_BEACON /* Atheros packet type */ - , ni->ni_txpower /* txpower XXX */ - , rate, 1 /* series 0 rate/tries */ - , HAL_TXKEYIX_INVALID /* no encryption */ - , antenna /* antenna mode */ - , flags /* no ack, veol for beacons */ - , 0 /* rts/cts rate */ - , 0 /* rts/cts duration */ - ); - /* NB: beacon's BufLen must be a multiple of 4 bytes */ - ath_hal_filltxdesc(ah, ds - , roundup(m->m_len, 4) /* buffer length */ - , AH_TRUE /* first segment */ - , AH_TRUE /* last segment */ - , ds /* first descriptor */ - ); -#if 0 - ath_desc_swap(ds); -#endif -#undef USE_SHPREAMBLE -} - -static void -ath_beacon_update(struct ieee80211vap *vap, int item) -{ - struct ieee80211_beacon_offsets *bo = &ATH_VAP(vap)->av_boff; - - setbit(bo->bo_flags, item); -} - -/* * Append the contents of src to dst; both queues * are assumed to be locked. */ -static void +void ath_txqmove(struct ath_txq *dst, struct ath_txq *src) { @@ -2852,255 +2606,6 @@ ath_txqmove(struct ath_txq *dst, struct } /* - * Transmit a beacon frame at SWBA. Dynamic updates to the - * frame contents are done as needed and the slot time is - * also adjusted based on current state. - */ -static void -ath_beacon_proc(void *arg, int pending) -{ - struct ath_softc *sc = arg; - struct ath_hal *ah = sc->sc_ah; - struct ieee80211vap *vap; - struct ath_buf *bf; - int slot, otherant; - uint32_t bfaddr; - - DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: pending %u\n", - __func__, pending); - /* - * 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 (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) { - sc->sc_bmisscount++; - sc->sc_stats.ast_be_missed++; - DPRINTF(sc, ATH_DEBUG_BEACON, - "%s: missed %u consecutive beacons\n", - __func__, sc->sc_bmisscount); - if (sc->sc_bmisscount >= ath_bstuck_threshold) - taskqueue_enqueue(sc->sc_tq, &sc->sc_bstucktask); - return; - } - if (sc->sc_bmisscount != 0) { - DPRINTF(sc, ATH_DEBUG_BEACON, - "%s: resume beacon xmit after %u misses\n", - __func__, sc->sc_bmisscount); - sc->sc_bmisscount = 0; - } - - if (sc->sc_stagbeacons) { /* staggered beacons */ - struct ieee80211com *ic = sc->sc_ifp->if_l2com; - uint32_t tsftu; - - tsftu = ath_hal_gettsf32(ah) >> 10; - /* XXX lintval */ - slot = ((tsftu % ic->ic_lintval) * ATH_BCBUF) / ic->ic_lintval; - vap = sc->sc_bslot[(slot+1) % ATH_BCBUF]; - bfaddr = 0; - if (vap != NULL && vap->iv_state >= IEEE80211_S_RUN) { - bf = ath_beacon_generate(sc, vap); - if (bf != NULL) - bfaddr = bf->bf_daddr; - } - } else { /* burst'd beacons */ - uint32_t *bflink = &bfaddr; - - for (slot = 0; slot < ATH_BCBUF; slot++) { - vap = sc->sc_bslot[slot]; - if (vap != NULL && vap->iv_state >= IEEE80211_S_RUN) { - bf = ath_beacon_generate(sc, vap); - if (bf != NULL) { - *bflink = bf->bf_daddr; - bflink = &bf->bf_desc->ds_link; - } - } - } - *bflink = 0; /* terminate list */ - } - - /* - * 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. - */ - /* XXX locking */ - if (sc->sc_updateslot == UPDATE) { - sc->sc_updateslot = COMMIT; /* commit next beacon */ - sc->sc_slotupdate = slot; - } else if (sc->sc_updateslot == COMMIT && sc->sc_slotupdate == slot) - ath_setslottime(sc); /* commit change to h/w */ - - /* - * Check recent per-antenna transmit statistics and flip - * the default antenna if noticeably more frames went out - * on the non-default antenna. - * XXX assumes 2 anntenae - */ - if (!sc->sc_diversity && (!sc->sc_stagbeacons || slot == 0)) { - otherant = sc->sc_defant & 1 ? 2 : 1; - if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2) - ath_setdefantenna(sc, otherant); - sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0; - } - - if (bfaddr != 0) { - /* - * Stop any current dma and put the new frame on the queue. - * This should never fail since we check above that no frames - * are still pending on the queue. - */ - if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) { - DPRINTF(sc, ATH_DEBUG_ANY, - "%s: beacon queue %u did not stop?\n", - __func__, sc->sc_bhalq); - } - /* NB: cabq traffic should already be queued and primed */ - ath_hal_puttxbuf(ah, sc->sc_bhalq, bfaddr); - ath_hal_txstart(ah, sc->sc_bhalq); - - sc->sc_stats.ast_be_xmit++; - } -} - -struct ath_buf * -ath_beacon_generate(struct ath_softc *sc, struct ieee80211vap *vap) -{ - struct ath_vap *avp = ATH_VAP(vap); - struct ath_txq *cabq = sc->sc_cabq; - struct ath_buf *bf; - struct mbuf *m; - int nmcastq, error; - - KASSERT(vap->iv_state >= IEEE80211_S_RUN, - ("not running, state %d", vap->iv_state)); - KASSERT(avp->av_bcbuf != NULL, ("no beacon buffer")); - - /* - * Update dynamic beacon contents. If this returns - * non-zero then we need to remap the memory because - * the beacon frame changed size (probably because - * of the TIM bitmap). - */ - bf = avp->av_bcbuf; - m = bf->bf_m; - /* XXX lock mcastq? */ - nmcastq = avp->av_mcastq.axq_depth; - - if (ieee80211_beacon_update(bf->bf_node, &avp->av_boff, m, nmcastq)) { - /* XXX too conservative? */ - bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); - error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, - bf->bf_segs, &bf->bf_nseg, - BUS_DMA_NOWAIT); - if (error != 0) { - if_printf(vap->iv_ifp, - "%s: bus_dmamap_load_mbuf_sg failed, error %u\n", - __func__, error); - return NULL; - } - } - if ((avp->av_boff.bo_tim[4] & 1) && cabq->axq_depth) { - DPRINTF(sc, ATH_DEBUG_BEACON, - "%s: cabq did not drain, mcastq %u cabq %u\n", - __func__, nmcastq, cabq->axq_depth); - sc->sc_stats.ast_cabq_busy++; - if (sc->sc_nvaps > 1 && sc->sc_stagbeacons) { - /* - * CABQ traffic from a previous vap is still pending. - * We must drain the q before this beacon frame goes - * out as otherwise this vap's stations will get cab - * frames from a different vap. - * XXX could be slow causing us to miss DBA - */ - ath_tx_draintxq(sc, cabq); - } - } - ath_beacon_setup(sc, bf); - bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); - - /* - * Enable the CAB queue before the beacon queue to - * insure cab frames are triggered by this beacon. - */ - if (avp->av_boff.bo_tim[4] & 1) { - struct ath_hal *ah = sc->sc_ah; - - /* NB: only at DTIM */ - ATH_TXQ_LOCK(cabq); - ATH_TXQ_LOCK(&avp->av_mcastq); - if (nmcastq) { - struct ath_buf *bfm; - - /* - * Move frames from the s/w mcast q to the h/w cab q. - * XXX MORE_DATA bit - */ - bfm = TAILQ_FIRST(&avp->av_mcastq.axq_q); - if (cabq->axq_link != NULL) { - *cabq->axq_link = bfm->bf_daddr; - } else - ath_hal_puttxbuf(ah, cabq->axq_qnum, - bfm->bf_daddr); - ath_txqmove(cabq, &avp->av_mcastq); - - sc->sc_stats.ast_cabq_xmit += nmcastq; - } - /* NB: gated by beacon so safe to start here */ - if (! TAILQ_EMPTY(&(cabq->axq_q))) - ath_hal_txstart(ah, cabq->axq_qnum); - ATH_TXQ_UNLOCK(&avp->av_mcastq); - ATH_TXQ_UNLOCK(cabq); - } - return bf; -} - -static void -ath_beacon_start_adhoc(struct ath_softc *sc, struct ieee80211vap *vap) -{ - struct ath_vap *avp = ATH_VAP(vap); - struct ath_hal *ah = sc->sc_ah; - struct ath_buf *bf; - struct mbuf *m; - int error; - - KASSERT(avp->av_bcbuf != NULL, ("no beacon buffer")); - - /* - * Update dynamic beacon contents. If this returns - * non-zero then we need to remap the memory because - * the beacon frame changed size (probably because - * of the TIM bitmap). - */ - bf = avp->av_bcbuf; - m = bf->bf_m; - if (ieee80211_beacon_update(bf->bf_node, &avp->av_boff, m, 0)) { - /* XXX too conservative? */ - bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); - error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, - bf->bf_segs, &bf->bf_nseg, - BUS_DMA_NOWAIT); - if (error != 0) { - if_printf(vap->iv_ifp, - "%s: bus_dmamap_load_mbuf_sg failed, error %u\n", - __func__, error); - return; - } - } - ath_beacon_setup(sc, bf); - bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); - - /* NB: caller is known to have already stopped tx dma */ - ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr); - ath_hal_txstart(ah, sc->sc_bhalq); -} - -/* * Reset the hardware, with no loss. * * This can't be used for a general case reset. @@ -3140,255 +2645,6 @@ ath_bstuck_proc(void *arg, int pending) ath_reset(ifp, ATH_RESET_NOLOSS); } -/* - * Reclaim beacon resources and return buffer to the pool. - */ -static void -ath_beacon_return(struct ath_softc *sc, struct ath_buf *bf) -{ - - DPRINTF(sc, ATH_DEBUG_NODE, "%s: free bf=%p, bf_m=%p, bf_node=%p\n", - __func__, bf, bf->bf_m, bf->bf_node); - if (bf->bf_m != NULL) { - bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); - m_freem(bf->bf_m); - bf->bf_m = NULL; - } - if (bf->bf_node != NULL) { - ieee80211_free_node(bf->bf_node); - bf->bf_node = NULL; - } - TAILQ_INSERT_TAIL(&sc->sc_bbuf, bf, bf_list); -} - -/* - * Reclaim beacon resources. - */ -static void -ath_beacon_free(struct ath_softc *sc) -{ - struct ath_buf *bf; - - TAILQ_FOREACH(bf, &sc->sc_bbuf, bf_list) { - DPRINTF(sc, ATH_DEBUG_NODE, - "%s: free bf=%p, bf_m=%p, bf_node=%p\n", - __func__, bf, bf->bf_m, bf->bf_node); - if (bf->bf_m != NULL) { - bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); - m_freem(bf->bf_m); - bf->bf_m = NULL; - } - if (bf->bf_node != NULL) { - ieee80211_free_node(bf->bf_node); - bf->bf_node = NULL; - } - } -} - -/* - * Configure the beacon and sleep timers. - * - * When operating as an AP this resets the TSF and sets - * up the hardware to notify us when we need to issue beacons. - * - * When operating in station mode 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. - */ -void -ath_beacon_config(struct ath_softc *sc, struct ieee80211vap *vap) -{ -#define TSF_TO_TU(_h,_l) \ - ((((u_int32_t)(_h)) << 22) | (((u_int32_t)(_l)) >> 10)) -#define FUDGE 2 - struct ath_hal *ah = sc->sc_ah; - struct ieee80211com *ic = sc->sc_ifp->if_l2com; - struct ieee80211_node *ni; - u_int32_t nexttbtt, intval, tsftu; - u_int64_t tsf; - - if (vap == NULL) - vap = TAILQ_FIRST(&ic->ic_vaps); /* XXX */ - ni = ieee80211_ref_node(vap->iv_bss); - - /* extract tstamp from last beacon and convert to TU */ - nexttbtt = TSF_TO_TU(LE_READ_4(ni->ni_tstamp.data + 4), - LE_READ_4(ni->ni_tstamp.data)); - if (ic->ic_opmode == IEEE80211_M_HOSTAP || - ic->ic_opmode == IEEE80211_M_MBSS) { - /* - * For multi-bss ap/mesh 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. - */ - /* NB: the beacon interval is kept internally in TU's */ - intval = ni->ni_intval & HAL_BEACON_PERIOD; - if (sc->sc_stagbeacons) - intval /= ATH_BCBUF; - } else { - /* NB: the beacon interval is kept internally in TU's */ - intval = ni->ni_intval & HAL_BEACON_PERIOD; - } - if (nexttbtt == 0) /* e.g. for ap mode */ - nexttbtt = intval; - else if (intval) /* NB: can be 0 for monitor mode */ - nexttbtt = roundup(nexttbtt, intval); - DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n", - __func__, nexttbtt, intval, ni->ni_intval); - if (ic->ic_opmode == IEEE80211_M_STA && !sc->sc_swbmiss) { - HAL_BEACON_STATE bs; - int dtimperiod, dtimcount; - int cfpperiod, cfpcount; - - /* - * Setup dtim and cfp parameters according to - * last beacon we received (which may be none). - */ - dtimperiod = ni->ni_dtim_period; - if (dtimperiod <= 0) /* NB: 0 if not known */ - dtimperiod = 1; - dtimcount = ni->ni_dtim_count; - if (dtimcount >= dtimperiod) /* NB: sanity check */ - dtimcount = 0; /* XXX? */ - cfpperiod = 1; /* NB: no PCF support yet */ - cfpcount = 0; - /* - * Pull nexttbtt forward to reflect the current - * TSF and calculate dtim+cfp state for the result. - */ - tsf = ath_hal_gettsf64(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); - memset(&bs, 0, sizeof(bs)); - 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; -#if 0 - /* - * The 802.11 layer records the offset to the DTIM - * bitmap while receiving beacons; use it here to - * enable h/w detection of our AID being marked in - * the bitmap vector (to indicate frames for us are - * pending at the AP). - * XXX do DTIM handling in s/w to WAR old h/w bugs - * XXX enable based on h/w rev for newer chips - */ - bs.bs_timoffset = ni->ni_timoff; -#endif - /* - * Calculate the number of consecutive beacons to miss - * before taking a BMISS interrupt. - * Note that we clamp the result to at most 10 beacons. - */ - bs.bs_bmissthreshold = vap->iv_bmissthreshold; - if (bs.bs_bmissthreshold > 10) - bs.bs_bmissthreshold = 10; - else if (bs.bs_bmissthreshold <= 0) - bs.bs_bmissthreshold = 1; - - /* - * Calculate sleep duration. The configuration is - * given in ms. We insure 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), bs.bs_intval); - if (bs.bs_sleepduration > bs.bs_dtimperiod) - bs.bs_sleepduration = roundup(bs.bs_sleepduration, bs.bs_dtimperiod); - - DPRINTF(sc, ATH_DEBUG_BEACON, - "%s: tsf %ju tsf:tu %u intval %u nexttbtt %u dtim %u nextdtim %u bmiss %u sleep %u cfp:period %u maxdur %u next %u timoffset %u\n" - , __func__ - , tsf, tsftu - , bs.bs_intval - , bs.bs_nexttbtt - , bs.bs_dtimperiod - , bs.bs_nextdtim - , bs.bs_bmissthreshold - , bs.bs_sleepduration - , bs.bs_cfpperiod - , bs.bs_cfpmaxduration - , bs.bs_cfpnext - , bs.bs_timoffset - ); - ath_hal_intrset(ah, 0); - ath_hal_beacontimers(ah, &bs); - sc->sc_imask |= HAL_INT_BMISS; - ath_hal_intrset(ah, sc->sc_imask); - } else { - ath_hal_intrset(ah, 0); - if (nexttbtt == intval) - intval |= HAL_BEACON_RESET_TSF; - if (ic->ic_opmode == IEEE80211_M_IBSS) { - /* - * 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 |= HAL_BEACON_ENA; - if (!sc->sc_hasveol) - sc->sc_imask |= HAL_INT_SWBA; - if ((intval & HAL_BEACON_RESET_TSF) == 0) { - /* - * Pull nexttbtt forward to reflect - * the current TSF. - */ - tsf = ath_hal_gettsf64(ah); - tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; - do { - nexttbtt += intval; - } while (nexttbtt < tsftu); - } - ath_beaconq_config(sc); - } else if (ic->ic_opmode == IEEE80211_M_HOSTAP || - ic->ic_opmode == IEEE80211_M_MBSS) { - /* - * In AP/mesh mode we enable the beacon timers - * and SWBA interrupts to prepare beacon frames. - */ - intval |= HAL_BEACON_ENA; - sc->sc_imask |= HAL_INT_SWBA; /* beacon prepare */ - ath_beaconq_config(sc); - } - ath_hal_beaconinit(ah, nexttbtt, intval); - sc->sc_bmisscount = 0; - ath_hal_intrset(ah, sc->sc_imask); - /* - * When using a self-linked beacon descriptor in - * ibss mode load it once here. - */ - if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) - ath_beacon_start_adhoc(sc, vap); - } - sc->sc_syncbeacon = 0; - ieee80211_free_node(ni); -#undef FUDGE -#undef TSF_TO_TU -} - static void ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) { Added: head/sys/dev/ath/if_ath_beacon.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/ath/if_ath_beacon.c Sun May 20 04:14:29 2012 (r235680) @@ -0,0 +1,841 @@ +/*- + * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any + * redistribution must be conditioned upon including a substantially + * similar Disclaimer requirement for further binary redistribution. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, + * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGES. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Driver for the Atheros Wireless LAN controller. + * + * This software is derived from work of Atsushi Onoe; his contribution + * is greatly appreciated. + */ + +#include "opt_inet.h" +#include "opt_ath.h" +/* + * This is needed for register operations which are performed + * by the driver - eg, calls to ath_hal_gettsf32(). + * + * It's also required for any AH_DEBUG checks in here, eg the + * module dependencies. + */ +#include "opt_ah.h" +#include "opt_wlan.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/sysctl.h> +#include <sys/mbuf.h> +#include <sys/malloc.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/kernel.h> +#include <sys/socket.h> +#include <sys/sockio.h> +#include <sys/errno.h> +#include <sys/callout.h> +#include <sys/bus.h> +#include <sys/endian.h> +#include <sys/kthread.h> +#include <sys/taskqueue.h> +#include <sys/priv.h> +#include <sys/module.h> +#include <sys/ktr.h> +#include <sys/smp.h> /* for mp_ncpus */ + +#include <machine/bus.h> + +#include <net/if.h> +#include <net/if_dl.h> +#include <net/if_media.h> +#include <net/if_types.h> +#include <net/if_arp.h> +#include <net/ethernet.h> +#include <net/if_llc.h> + +#include <net80211/ieee80211_var.h> +#include <net80211/ieee80211_regdomain.h> +#ifdef IEEE80211_SUPPORT_SUPERG +#include <net80211/ieee80211_superg.h> +#endif + +#include <net/bpf.h> + +#ifdef INET +#include <netinet/in.h> +#include <netinet/if_ether.h> +#endif + +#include <dev/ath/if_athvar.h> + +#include <dev/ath/if_ath_debug.h> +#include <dev/ath/if_ath_misc.h> +#include <dev/ath/if_ath_tx.h> +#include <dev/ath/if_ath_beacon.h> + +#ifdef ATH_TX99_DIAG +#include <dev/ath/ath_tx99/ath_tx99.h> +#endif + +/* + * Setup a h/w transmit queue for beacons. + */ +int +ath_beaconq_setup(struct ath_hal *ah) +{ + HAL_TXQ_INFO qi; + + memset(&qi, 0, sizeof(qi)); + qi.tqi_aifs = HAL_TXQ_USEDEFAULT; + qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; + qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; + /* NB: for dynamic turbo, don't enable any other interrupts */ + qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE; + return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi); +} + +/* + * Setup the transmit queue parameters for the beacon queue. + */ +int +ath_beaconq_config(struct ath_softc *sc) +{ +#define ATH_EXPONENT_TO_VALUE(v) ((1<<(v))-1) + struct ieee80211com *ic = sc->sc_ifp->if_l2com; + struct ath_hal *ah = sc->sc_ah; + HAL_TXQ_INFO qi; + + ath_hal_gettxqueueprops(ah, sc->sc_bhalq, &qi); + if (ic->ic_opmode == IEEE80211_M_HOSTAP || + ic->ic_opmode == IEEE80211_M_MBSS) { + /* + * Always burst out beacon and CAB traffic. + */ + qi.tqi_aifs = ATH_BEACON_AIFS_DEFAULT; + qi.tqi_cwmin = ATH_BEACON_CWMIN_DEFAULT; + qi.tqi_cwmax = ATH_BEACON_CWMAX_DEFAULT; + } else { + struct wmeParams *wmep = + &ic->ic_wme.wme_chanParams.cap_wmeParams[WME_AC_BE]; + /* + * Adhoc mode; important thing is to use 2x cwmin. + */ + qi.tqi_aifs = wmep->wmep_aifsn; + qi.tqi_cwmin = 2*ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); + qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); + } + + if (!ath_hal_settxqueueprops(ah, sc->sc_bhalq, &qi)) { + device_printf(sc->sc_dev, "unable to update parameters for " + "beacon hardware queue!\n"); + return 0; + } else { + ath_hal_resettxqueue(ah, sc->sc_bhalq); /* push to h/w */ + return 1; + } +#undef ATH_EXPONENT_TO_VALUE +} + +/* + * Allocate and setup an initial beacon frame. + */ +int +ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni) +{ + struct ieee80211vap *vap = ni->ni_vap; + struct ath_vap *avp = ATH_VAP(vap); + struct ath_buf *bf; + struct mbuf *m; + int error; + + bf = avp->av_bcbuf; + DPRINTF(sc, ATH_DEBUG_NODE, "%s: bf_m=%p, bf_node=%p\n", + __func__, bf->bf_m, bf->bf_node); + if (bf->bf_m != NULL) { + bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); + m_freem(bf->bf_m); + bf->bf_m = NULL; + } + if (bf->bf_node != NULL) { + ieee80211_free_node(bf->bf_node); + bf->bf_node = NULL; + } + + /* + * NB: the beacon data buffer must be 32-bit aligned; + * we assume the mbuf routines will return us something + * with this alignment (perhaps should assert). + */ *** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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