diff options
author | Sujith <Sujith.Manoharan@atheros.com> | 2009-03-03 07:46:51 +0300 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2009-03-05 22:39:41 +0300 |
commit | 9fc9ab0a6929c9f137747df0ecf294e9582607f9 (patch) | |
tree | 6a338c68b7395b404c9eb8e3c5a8e46b9c0b21c5 /drivers/net/wireless/ath9k/beacon.c | |
parent | 0c98de6535f4de746618547c057dccd442ba968a (diff) | |
download | linux-9fc9ab0a6929c9f137747df0ecf294e9582607f9.tar.xz |
ath9k: Scrub beacon.c
Remove useless comments, fix indentation.
Also, remove all occurrences of ASSERT(vif) which are not needed.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath9k/beacon.c')
-rw-r--r-- | drivers/net/wireless/ath9k/beacon.c | 177 |
1 files changed, 53 insertions, 124 deletions
diff --git a/drivers/net/wireless/ath9k/beacon.c b/drivers/net/wireless/ath9k/beacon.c index 18bda362d3ab..c3044891a935 100644 --- a/drivers/net/wireless/ath9k/beacon.c +++ b/drivers/net/wireless/ath9k/beacon.c @@ -44,15 +44,14 @@ static int ath_beaconq_config(struct ath_softc *sc) "unable to update h/w beacon queue parameters\n"); return 0; } else { - ath9k_hw_resettxqueue(ah, sc->beacon.beaconq); /* push to h/w */ + ath9k_hw_resettxqueue(ah, sc->beacon.beaconq); return 1; } } static void ath_bstuck_process(struct ath_softc *sc) { - DPRINTF(sc, ATH_DBG_BEACON, - "stuck beacon; resetting (bmiss count %u)\n", + DPRINTF(sc, ATH_DBG_BEACON, "stuck beacon; resetting (bmiss count %u)\n", sc->beacon.bmisscnt); ath_reset(sc, false); } @@ -62,24 +61,18 @@ static void ath_bstuck_process(struct ath_softc *sc) * 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) +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; - u8 rix, rate; - int ctsrate = 0; - int ctsduration = 0; - - DPRINTF(sc, ATH_DBG_BEACON, "m %p len %u\n", skb, skb->len); + int flags, antenna, ctsrate = 0, ctsduration = 0; + u8 rate; - /* setup descriptors */ ds = bf->bf_desc; - flags = ATH9K_TXDESC_NOACK; if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC && @@ -92,53 +85,39 @@ static void ath_beacon_setup(struct ath_softc *sc, ds->ds_link = 0; /* * Switch antenna every beacon. - * Should only switch every beacon period, not for every - * SWBA's - * XXX assumes two antenna + * 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; - /* - * Calculate rate code. - * XXX everything at min xmit rate - */ - rix = 0; rt = sc->cur_rate_table; - rate = rt->info[rix].ratecode; + rate = rt->info[0].ratecode; if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) - rate |= rt->info[rix].short_preamble; - - ath9k_hw_set11n_txdesc(ah, ds, - skb->len + FCS_LEN, /* frame length */ - ATH9K_PKT_TYPE_BEACON, /* Atheros packet type */ - MAX_RATE_POWER, /* FIXME */ - ATH9K_TXKEYIX_INVALID, /* no encryption */ - ATH9K_KEY_TYPE_CLEAR, /* no encryption */ - flags /* no ack, - veol for beacons */ - ); + 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), /* buffer length */ - true, /* first segment */ - true, /* last segment */ - ds /* first descriptor */ - ); + 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); + ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration, + series, 4, 0); } -/* Generate beacon frame and queue cab data for a VIF */ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id) { struct ath_buf *bf; @@ -150,8 +129,6 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id) int cabq_depth; vif = sc->vifs[if_id]; - ASSERT(vif); - avp = (void *)vif->drv_priv; cabq = sc->beacon.cabq; @@ -161,15 +138,18 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id) 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); + skb->len, DMA_TO_DEVICE); dev_kfree_skb_any(skb); } + /* Get a new beacon from mac80211 */ + skb = ieee80211_beacon_get(sc->hw, vif); bf->bf_mpdu = skb; if (skb == NULL) @@ -189,13 +169,11 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id) bf->bf_buf_addr = bf->bf_dmacontext = dma_map_single(sc->dev, skb->data, - skb->len, - DMA_TO_DEVICE); + 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_CONFIG, - "dma_mapping_error() on beaconing\n"); + DPRINTF(sc, ATH_DBG_FATAL, "dma_mapping_error on beaconing\n"); return NULL; } @@ -214,25 +192,15 @@ static struct ath_buf *ath_beacon_generate(struct ath_softc *sc, int if_id) spin_unlock_bh(&cabq->axq_lock); if (skb && cabq_depth) { - /* - * Unlock the cabq lock as ath_tx_draintxq acquires - * the lock again which is a common function and that - * acquires txq lock inside. - */ if (sc->nvifs > 1) { - ath_draintxq(sc, cabq, false); DPRINTF(sc, ATH_DBG_BEACON, - "flush previous cabq traffic\n"); + "Flushing previous cabq traffic\n"); + ath_draintxq(sc, cabq, false); } } - /* Construct tx descriptor. */ ath_beacon_setup(sc, avp, bf); - /* - * Enable the CAB queue before the beacon queue to - * insure cab frames are triggered by this beacon. - */ while (skb) { ath_tx_cabq(sc, skb); skb = ieee80211_get_buffered_bc(sc->hw, vif); @@ -254,19 +222,14 @@ static void ath_beacon_start_adhoc(struct ath_softc *sc, int if_id) struct sk_buff *skb; vif = sc->vifs[if_id]; - ASSERT(vif); - avp = (void *)vif->drv_priv; - if (avp->av_bcbuf == NULL) { - DPRINTF(sc, ATH_DBG_BEACON, "avp=%p av_bcbuf=%p\n", - avp, avp != NULL ? avp->av_bcbuf : NULL); + if (avp->av_bcbuf == NULL) return; - } + bf = avp->av_bcbuf; skb = (struct sk_buff *) bf->bf_mpdu; - /* Construct tx descriptor. */ ath_beacon_setup(sc, avp, bf); /* NB: caller is known to have already stopped tx dma */ @@ -298,8 +261,6 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id) __le64 tstamp; vif = sc->vifs[if_id]; - ASSERT(vif); - avp = (void *)vif->drv_priv; /* Allocate a beacon descriptor if we haven't done so. */ @@ -339,22 +300,17 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id) } } - /* release the previous beacon frame , if it already exists. */ + /* 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); + skb->len, DMA_TO_DEVICE); dev_kfree_skb_any(skb); bf->bf_mpdu = NULL; } - /* - * NB: the beacon data buffer must be 32-bit aligned. - * FIXME: Fill avp->av_btxctl.txpower and - * avp->av_btxctl.shortPreamble - */ + /* 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"); @@ -403,13 +359,12 @@ int ath_beacon_alloc(struct ath_softc *sc, int if_id) bf->bf_mpdu = skb; bf->bf_buf_addr = bf->bf_dmacontext = dma_map_single(sc->dev, skb->data, - skb->len, - DMA_TO_DEVICE); + 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_CONFIG, - "dma_mapping_error() on beacon alloc\n"); + DPRINTF(sc, ATH_DBG_FATAL, + "dma_mapping_error on beacon alloc\n"); return -ENOMEM; } @@ -430,8 +385,7 @@ void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp) 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); + skb->len, DMA_TO_DEVICE); dev_kfree_skb_any(skb); bf->bf_mpdu = NULL; } @@ -441,18 +395,15 @@ void ath_beacon_return(struct ath_softc *sc, struct ath_vif *avp) } } -void ath9k_beacon_tasklet(unsigned long data) +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; int slot, if_id; - u32 bfaddr; + u32 bfaddr, show_cycles = 0, bc = 0, tsftu; u32 rx_clear = 0, rx_frame = 0, tx_frame = 0; - u32 show_cycles = 0; - u32 bc = 0; /* beacon count */ u64 tsf; - u32 tsftu; u16 intval; if (sc->sc_flags & SC_OP_NO_RESET) { @@ -627,7 +578,6 @@ void ath_beacon_config(struct ath_softc *sc, int if_id) if (if_id != ATH_IF_ID_ANY) { vif = sc->vifs[if_id]; - ASSERT(vif); avp = (void *)vif->drv_priv; opmode = avp->av_opmode; } else { @@ -757,30 +707,11 @@ void ath_beacon_config(struct ath_softc *sc, int if_id) bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD; DPRINTF(sc, ATH_DBG_BEACON, - "tsf %llu " - "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", - (unsigned long long)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 - ); + "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); ath9k_hw_set_interrupts(ah, 0); ath9k_hw_set_sta_beacon_timers(ah, &bs); @@ -789,17 +720,15 @@ void ath_beacon_config(struct ath_softc *sc, int if_id) } else { u64 tsf; u32 tsftu; + ath9k_hw_set_interrupts(ah, 0); if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) { - /* - * Pull nexttbtt forward to reflect the current - * TSF - */ + /* Pull nexttbtt forward to reflect the current TSF */ #define FUDGE 2 if (!(intval & ATH9K_BEACON_RESET_TSF)) { tsf = ath9k_hw_gettsf64(ah); tsftu = TSF_TO_TU((u32)(tsf>>32), - (u32)tsf) + FUDGE; + (u32)tsf) + FUDGE; do { nexttbtt += intval; } while (nexttbtt < tsftu); @@ -807,8 +736,7 @@ void ath_beacon_config(struct ath_softc *sc, int if_id) #undef FUDGE DPRINTF(sc, ATH_DBG_BEACON, "IBSS nexttbtt %u intval %u (%u)\n", - nexttbtt, - intval & ~ATH9K_BEACON_RESET_TSF, + nexttbtt, intval & ~ATH9K_BEACON_RESET_TSF, conf.beacon_interval); /* @@ -825,18 +753,19 @@ void ath_beacon_config(struct ath_softc *sc, int if_id) } else if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { if (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; /* beacon prepare */ + sc->imask |= ATH9K_INT_SWBA; ath_beaconq_config(sc); } + ath9k_hw_beaconinit(ah, nexttbtt, intval); sc->beacon.bmisscnt = 0; ath9k_hw_set_interrupts(ah, sc->imask); + /* * When using a self-linked beacon descriptor in * ibss mode load it once here. |