diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/xmit.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/xmit.c | 165 |
1 files changed, 72 insertions, 93 deletions
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 4d571394c7a..2c9da6b2ecb 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -29,6 +29,8 @@ #define HT_LTF(_ns) (4 * (_ns)) #define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */ #define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */ +#define TIME_SYMBOLS(t) ((t) >> 2) +#define TIME_SYMBOLS_HALFGI(t) (((t) * 5 - 4) / 18) #define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2) #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18) @@ -74,50 +76,23 @@ enum { MCS_HT40_SGI, }; -static int ath_max_4ms_framelen[4][32] = { - [MCS_HT20] = { - 3212, 6432, 9648, 12864, 19300, 25736, 28952, 32172, - 6424, 12852, 19280, 25708, 38568, 51424, 57852, 64280, - 9628, 19260, 28896, 38528, 57792, 65532, 65532, 65532, - 12828, 25656, 38488, 51320, 65532, 65532, 65532, 65532, - }, - [MCS_HT20_SGI] = { - 3572, 7144, 10720, 14296, 21444, 28596, 32172, 35744, - 7140, 14284, 21428, 28568, 42856, 57144, 64288, 65532, - 10700, 21408, 32112, 42816, 64228, 65532, 65532, 65532, - 14256, 28516, 42780, 57040, 65532, 65532, 65532, 65532, - }, - [MCS_HT40] = { - 6680, 13360, 20044, 26724, 40092, 53456, 60140, 65532, - 13348, 26700, 40052, 53400, 65532, 65532, 65532, 65532, - 20004, 40008, 60016, 65532, 65532, 65532, 65532, 65532, - 26644, 53292, 65532, 65532, 65532, 65532, 65532, 65532, - }, - [MCS_HT40_SGI] = { - 7420, 14844, 22272, 29696, 44544, 59396, 65532, 65532, - 14832, 29668, 44504, 59340, 65532, 65532, 65532, 65532, - 22232, 44464, 65532, 65532, 65532, 65532, 65532, 65532, - 29616, 59232, 65532, 65532, 65532, 65532, 65532, 65532, - } -}; - /*********************/ /* Aggregation logic */ /*********************/ -static void ath_txq_lock(struct ath_softc *sc, struct ath_txq *txq) +void ath_txq_lock(struct ath_softc *sc, struct ath_txq *txq) __acquires(&txq->axq_lock) { spin_lock_bh(&txq->axq_lock); } -static void ath_txq_unlock(struct ath_softc *sc, struct ath_txq *txq) +void ath_txq_unlock(struct ath_softc *sc, struct ath_txq *txq) __releases(&txq->axq_lock) { spin_unlock_bh(&txq->axq_lock); } -static void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq) +void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq) __releases(&txq->axq_lock) { struct sk_buff_head q; @@ -614,10 +589,8 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, rcu_read_unlock(); - if (needreset) { - RESET_STAT_INC(sc, RESET_TYPE_TX_ERROR); - ieee80211_queue_work(sc->hw, &sc->hw_reset_work); - } + if (needreset) + ath9k_queue_reset(sc, RESET_TYPE_TX_ERROR); } static bool ath_lookup_legacy(struct ath_buf *bf) @@ -650,6 +623,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, struct ieee80211_tx_rate *rates; u32 max_4ms_framelen, frmlen; u16 aggr_limit, bt_aggr_limit, legacy = 0; + int q = tid->ac->txq->mac80211_qnum; int i; skb = bf->bf_mpdu; @@ -658,8 +632,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, /* * Find the lowest frame length among the rate series that will have a - * 4ms transmit duration. - * TODO - TXOP limit needs to be considered. + * 4ms (or TXOP limited) transmit duration. */ max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; @@ -682,7 +655,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) modeidx++; - frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx]; + frmlen = sc->tx.max_aggr_framelen[q][modeidx][rates[i].idx]; max_4ms_framelen = min(max_4ms_framelen, frmlen); } @@ -929,6 +902,44 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, int pktlen, return duration; } +static int ath_max_framelen(int usec, int mcs, bool ht40, bool sgi) +{ + int streams = HT_RC_2_STREAMS(mcs); + int symbols, bits; + int bytes = 0; + + symbols = sgi ? TIME_SYMBOLS_HALFGI(usec) : TIME_SYMBOLS(usec); + bits = symbols * bits_per_symbol[mcs % 8][ht40] * streams; + bits -= OFDM_PLCP_BITS; + bytes = bits / 8; + bytes -= L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); + if (bytes > 65532) + bytes = 65532; + + return bytes; +} + +void ath_update_max_aggr_framelen(struct ath_softc *sc, int queue, int txop) +{ + u16 *cur_ht20, *cur_ht20_sgi, *cur_ht40, *cur_ht40_sgi; + int mcs; + + /* 4ms is the default (and maximum) duration */ + if (!txop || txop > 4096) + txop = 4096; + + cur_ht20 = sc->tx.max_aggr_framelen[queue][MCS_HT20]; + cur_ht20_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT20_SGI]; + cur_ht40 = sc->tx.max_aggr_framelen[queue][MCS_HT40]; + cur_ht40_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT40_SGI]; + for (mcs = 0; mcs < 32; mcs++) { + cur_ht20[mcs] = ath_max_framelen(txop, mcs, false, false); + cur_ht20_sgi[mcs] = ath_max_framelen(txop, mcs, false, true); + cur_ht40[mcs] = ath_max_framelen(txop, mcs, true, false); + cur_ht40_sgi[mcs] = ath_max_framelen(txop, mcs, true, true); + } +} + static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, struct ath_tx_info *info, int len) { @@ -1165,6 +1176,7 @@ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, { struct ath_atx_tid *txtid; struct ath_node *an; + u8 density; an = (struct ath_node *)sta->drv_priv; txtid = ATH_AN_2_TID(an, tid); @@ -1172,6 +1184,17 @@ int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, if (txtid->state & (AGGR_CLEANUP | AGGR_ADDBA_COMPLETE)) return -EAGAIN; + /* update ampdu factor/density, they may have changed. This may happen + * in HT IBSS when a beacon with HT-info is received after the station + * has already been added. + */ + if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) { + an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + + sta->ht_cap.ampdu_factor); + density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density); + an->mpdudensity = density; + } + txtid->state |= AGGR_ADDBA_PROGRESS; txtid->paused = true; *ssn = txtid->seq_start = txtid->seq_next; @@ -1391,16 +1414,6 @@ int ath_txq_update(struct ath_softc *sc, int qnum, int error = 0; struct ath9k_tx_queue_info qi; - if (qnum == sc->beacon.beaconq) { - /* - * XXX: for beacon queue, we just save the parameter. - * It will be picked up by ath_beaconq_config when - * it's necessary. - */ - sc->beacon.beacon_qi = *qinfo; - return 0; - } - BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); ath9k_hw_get_txq_props(ah, qnum, &qi); @@ -1526,7 +1539,7 @@ bool ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) int i; u32 npend = 0; - if (sc->sc_flags & SC_OP_INVALID) + if (test_bit(SC_OP_INVALID, &sc->sc_flags)) return true; ath9k_hw_abort_tx_dma(ah); @@ -1574,7 +1587,8 @@ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) struct ath_atx_ac *ac, *ac_tmp, *last_ac; struct ath_atx_tid *tid, *last_tid; - if (work_pending(&sc->hw_reset_work) || list_empty(&txq->axq_acq) || + if (test_bit(SC_OP_HW_RESET, &sc->sc_flags) || + list_empty(&txq->axq_acq) || txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) return; @@ -1976,7 +1990,8 @@ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, ath_txq_lock(sc, txq); if (txq == sc->tx.txq_map[q] && - ++txq->pending_frames > ATH_MAX_QDEPTH && !txq->stopped) { + ++txq->pending_frames > sc->tx.txq_max_pending[q] && + !txq->stopped) { ieee80211_stop_queue(sc->hw, q); txq->stopped = true; } @@ -1999,6 +2014,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; int q, padpos, padsize; + unsigned long flags; ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb); @@ -2017,6 +2033,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, skb_pull(skb, padsize); } + spin_lock_irqsave(&sc->sc_pm_lock, flags); if ((sc->ps_flags & PS_WAIT_FOR_TX_ACK) && !txq->axq_depth) { sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK; ath_dbg(common, PS, @@ -2026,13 +2043,15 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, PS_WAIT_FOR_PSPOLL_DATA | PS_WAIT_FOR_TX_ACK)); } + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); q = skb_get_queue_mapping(skb); if (txq == sc->tx.txq_map[q]) { if (WARN_ON(--txq->pending_frames < 0)) txq->pending_frames = 0; - if (txq->stopped && txq->pending_frames < ATH_MAX_QDEPTH) { + if (txq->stopped && + txq->pending_frames < sc->tx.txq_max_pending[q]) { ieee80211_wake_queue(sc->hw, q); txq->stopped = false; } @@ -2176,7 +2195,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) ath_txq_lock(sc, txq); for (;;) { - if (work_pending(&sc->hw_reset_work)) + if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) break; if (list_empty(&txq->axq_q)) { @@ -2236,46 +2255,6 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) ath_txq_unlock_complete(sc, txq); } -static void ath_tx_complete_poll_work(struct work_struct *work) -{ - struct ath_softc *sc = container_of(work, struct ath_softc, - tx_complete_work.work); - struct ath_txq *txq; - int i; - bool needreset = false; -#ifdef CONFIG_ATH9K_DEBUGFS - sc->tx_complete_poll_work_seen++; -#endif - - for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) - if (ATH_TXQ_SETUP(sc, i)) { - txq = &sc->tx.txq[i]; - ath_txq_lock(sc, txq); - if (txq->axq_depth) { - if (txq->axq_tx_inprogress) { - needreset = true; - ath_txq_unlock(sc, txq); - break; - } else { - txq->axq_tx_inprogress = true; - } - } - ath_txq_unlock_complete(sc, txq); - } - - if (needreset) { - ath_dbg(ath9k_hw_common(sc->sc_ah), RESET, - "tx hung, resetting the chip\n"); - RESET_STAT_INC(sc, RESET_TYPE_TX_HANG); - ieee80211_queue_work(sc->hw, &sc->hw_reset_work); - } - - ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, - msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT)); -} - - - void ath_tx_tasklet(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; @@ -2299,7 +2278,7 @@ void ath_tx_edma_tasklet(struct ath_softc *sc) int status; for (;;) { - if (work_pending(&sc->hw_reset_work)) + if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) break; status = ath9k_hw_txprocdesc(ah, NULL, (void *)&ts); |