From e63835b0f4d8545942fd41b3ca32bbf71bd73e4b Mon Sep 17 00:00:00 2001 From: Sujith Date: Tue, 18 Nov 2008 09:07:53 +0530 Subject: ath9k: Remove ath9k_rate_table Maintaining two sets of rate tables is redundant, remove one and use struct ath_rate_table exclusively. Signed-off-by: Sujith Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/xmit.c | 163 ++++++++++++++------------------------ 1 file changed, 59 insertions(+), 104 deletions(-) (limited to 'drivers/net/wireless/ath9k/xmit.c') diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c index baf5cb9d967..b2d0cca6f4a 100644 --- a/drivers/net/wireless/ath9k/xmit.c +++ b/drivers/net/wireless/ath9k/xmit.c @@ -176,25 +176,6 @@ static int get_hw_crypto_keytype(struct sk_buff *skb) return ATH9K_KEY_TYPE_CLEAR; } -static void setup_rate_retries(struct ath_softc *sc, struct sk_buff *skb) -{ - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - struct ieee80211_tx_rate *rates = tx_info->control.rates; - struct ieee80211_hdr *hdr; - __le16 fc; - - hdr = (struct ieee80211_hdr *)skb->data; - fc = hdr->frame_control; - - if (ieee80211_has_morefrags(fc) || - (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) { - rates[1].count = rates[2].count = rates[3].count = 0; - rates[1].idx = rates[2].idx = rates[3].idx = 0; - /* reset tries but keep rate index */ - rates[0].count = ATH_TXMAXTRY; - } -} - /* Called only when tx aggregation is enabled and HT is supported */ static void assign_aggr_tid_seqno(struct sk_buff *skb, @@ -468,27 +449,23 @@ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, * width - 0 for 20 MHz, 1 for 40 MHz * half_gi - to use 4us v/s 3.6 us for symbol time */ - static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, int width, int half_gi, bool shortPreamble) { - const struct ath9k_rate_table *rt = sc->sc_currates; + struct ath_rate_table *rate_table = sc->hw_rate_table[sc->sc_curmode]; u32 nbits, nsymbits, duration, nsymbols; u8 rc; int streams, pktlen; pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; - rc = rt->info[rix].rateCode; + rc = rate_table->info[rix].ratecode; - /* - * for legacy rates, use old function to compute packet duration - */ + /* for legacy rates, use old function to compute packet duration */ if (!IS_HT_RATE(rc)) - return ath9k_hw_computetxtime(sc->sc_ah, rt, pktlen, rix, - shortPreamble); - /* - * find number of symbols: PLCP + data - */ + return ath9k_hw_computetxtime(sc->sc_ah, rate_table, pktlen, + rix, shortPreamble); + + /* find number of symbols: PLCP + data */ nbits = (pktlen << 3) + OFDM_PLCP_BITS; nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width]; nsymbols = (nbits + nsymbits - 1) / nsymbits; @@ -498,9 +475,7 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, else duration = SYMBOL_TIME_HALFGI(nsymbols); - /* - * addup duration for legacy/ht training and signal fields - */ + /* addup duration for legacy/ht training and signal fields */ streams = HT_RC_2_STREAMS(rc); duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); @@ -512,114 +487,104 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) { struct ath_hal *ah = sc->sc_ah; - const struct ath9k_rate_table *rt; + struct ath_rate_table *rt; struct ath_desc *ds = bf->bf_desc; struct ath_desc *lastds = bf->bf_lastbf->bf_desc; struct ath9k_11n_rate_series series[4]; - int i, flags, rtsctsena = 0; - u32 ctsduration = 0; - u8 rix = 0, cix, ctsrate = 0; struct ath_node *an = NULL; struct sk_buff *skb; struct ieee80211_tx_info *tx_info; struct ieee80211_tx_rate *rates; + struct ieee80211_hdr *hdr; + int i, flags, rtsctsena = 0; + u32 ctsduration = 0; + u8 rix = 0, cix, ctsrate = 0; + __le16 fc; + + memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); skb = (struct sk_buff *)bf->bf_mpdu; + hdr = (struct ieee80211_hdr *)skb->data; + fc = hdr->frame_control; tx_info = IEEE80211_SKB_CB(skb); - rates = tx_info->rate_driver_data[0]; + rates = tx_info->control.rates; if (tx_info->control.sta) an = (struct ath_node *)tx_info->control.sta->drv_priv; - /* - * get the cix for the lowest valid rix. - */ - rt = sc->sc_currates; + if (ieee80211_has_morefrags(fc) || + (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) { + rates[1].count = rates[2].count = rates[3].count = 0; + rates[1].idx = rates[2].idx = rates[3].idx = 0; + rates[0].count = ATH_TXMAXTRY; + } + + /* get the cix for the lowest valid rix */ + rt = sc->hw_rate_table[sc->sc_curmode]; for (i = 3; i >= 0; i--) { - if (rates[i].count) { + if (rates[i].count && (rates[i].idx >= 0)) { rix = rates[i].idx; break; } } + flags = (bf->bf_flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA)); - cix = rt->info[rix].controlRate; + cix = rt->info[rix].ctrl_rate; /* - * If 802.11g protection is enabled, determine whether - * to use RTS/CTS or just CTS. Note that this is only - * done for OFDM/HT unicast frames. + * If 802.11g protection is enabled, determine whether to use RTS/CTS or + * just CTS. Note that this is only done for OFDM/HT unicast frames. */ - if (sc->sc_protmode != PROT_M_NONE && - (rt->info[rix].phy == PHY_OFDM || - rt->info[rix].phy == PHY_HT) && - (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0) { + if (sc->sc_protmode != PROT_M_NONE && !(bf->bf_flags & ATH9K_TXDESC_NOACK) + && (rt->info[rix].phy == WLAN_PHY_OFDM || + WLAN_RC_PHY_HT(rt->info[rix].phy))) { if (sc->sc_protmode == PROT_M_RTSCTS) flags = ATH9K_TXDESC_RTSENA; else if (sc->sc_protmode == PROT_M_CTSONLY) flags = ATH9K_TXDESC_CTSENA; - cix = rt->info[sc->sc_protrix].controlRate; + cix = rt->info[sc->sc_protrix].ctrl_rate; rtsctsena = 1; } - /* For 11n, the default behavior is to enable RTS for - * hw retried frames. We enable the global flag here and - * let rate series flags determine which rates will actually - * use RTS. + /* For 11n, the default behavior is to enable RTS for hw retried frames. + * We enable the global flag here and let rate series flags determine + * which rates will actually use RTS. */ if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) && bf_isdata(bf)) { - /* - * 802.11g protection not needed, use our default behavior - */ + /* 802.11g protection not needed, use our default behavior */ if (!rtsctsena) flags = ATH9K_TXDESC_RTSENA; } - /* - * Set protection if aggregate protection on - */ + /* Set protection if aggregate protection on */ if (sc->sc_config.ath_aggr_prot && (!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) { flags = ATH9K_TXDESC_RTSENA; - cix = rt->info[sc->sc_protrix].controlRate; + cix = rt->info[sc->sc_protrix].ctrl_rate; rtsctsena = 1; } - /* - * For AR5416 - RTS cannot be followed by a frame larger than 8K. - */ - if (bf_isaggr(bf) && (bf->bf_al > ah->ah_caps.rts_aggr_limit)) { - /* - * Ensure that in the case of SM Dynamic power save - * while we are bursting the second aggregate the - * RTS is cleared. - */ + /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ + if (bf_isaggr(bf) && (bf->bf_al > ah->ah_caps.rts_aggr_limit)) flags &= ~(ATH9K_TXDESC_RTSENA); - } - - /* - * CTS transmit rate is derived from the transmit rate - * by looking in the h/w rate table. We must also factor - * in whether or not a short preamble is to be used. - * NB: cix is set above where RTS/CTS is enabled - */ - BUG_ON(cix == 0xff); - ctsrate = rt->info[cix].rateCode | - (bf_isshpreamble(bf) ? rt->info[cix].shortPreamble : 0); /* - * Setup HAL rate series + * CTS transmit rate is derived from the transmit rate by looking in the + * h/w rate table. We must also factor in whether or not a short + * preamble is to be used. NB: cix is set above where RTS/CTS is enabled */ - memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); + ctsrate = rt->info[cix].ratecode | + (bf_isshpreamble(bf) ? rt->info[cix].short_preamble : 0); for (i = 0; i < 4; i++) { - if (!rates[i].count) + if (!rates[i].count || (rates[i].idx < 0)) continue; rix = rates[i].idx; - series[i].Rate = rt->info[rix].rateCode | - (bf_isshpreamble(bf) ? rt->info[rix].shortPreamble : 0); + series[i].Rate = rt->info[rix].ratecode | + (bf_isshpreamble(bf) ? rt->info[rix].short_preamble : 0); series[i].Tries = rates[i].count; @@ -645,13 +610,9 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; } - /* - * set dur_update_en for l-sig computation except for PS-Poll frames - */ - ath9k_hw_set11n_ratescenario(ah, ds, lastds, - !bf_ispspoll(bf), - ctsrate, - ctsduration, + /* set dur_update_en for l-sig computation except for PS-Poll frames */ + ath9k_hw_set11n_ratescenario(ah, ds, lastds, !bf_ispspoll(bf), + ctsrate, ctsduration, series, 4, flags); if (sc->sc_config.ath_aggr_prot && flags) @@ -662,7 +623,6 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) * Function to send a normal HT (non-AMPDU) frame * NB: must be called with txq lock held */ - static int ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, @@ -1256,7 +1216,6 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_atx_tid *tid) { struct ath_rate_table *rate_table = sc->hw_rate_table[sc->sc_curmode]; - const struct ath9k_rate_table *rt = sc->sc_currates; struct sk_buff *skb; struct ieee80211_tx_info *tx_info; struct ieee80211_tx_rate *rates; @@ -1280,7 +1239,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc, for (i = 0; i < 4; i++) { if (rates[i].count) { - if (rt->info[rates[i].idx].phy != PHY_HT) { + if (!WLAN_RC_PHY_HT(rate_table->info[rates[i].idx].phy)) { legacy = 1; break; } @@ -1325,7 +1284,7 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_buf *bf, u16 frmlen) { - const struct ath9k_rate_table *rt = sc->sc_currates; + struct ath_rate_table *rt = sc->hw_rate_table[sc->sc_curmode]; struct sk_buff *skb = bf->bf_mpdu; struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); u32 nsymbits, nsymbols, mpdudensity; @@ -1362,7 +1321,7 @@ static int ath_compute_num_delims(struct ath_softc *sc, rix = tx_info->control.rates[0].idx; flags = tx_info->control.rates[0].flags; - rc = rt->info[rix].rateCode; + rc = rt->info[rix].ratecode; width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; @@ -1713,10 +1672,6 @@ static void ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf, bf->bf_keyix = ATH9K_TXKEYIX_INVALID; } - /* Rate series */ - - setup_rate_retries(sc, skb); - /* Assign seqno, tidno */ if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR)) -- cgit v1.2.3