diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 48ac9ff01ac0..485c0a3a9ce1 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -56,7 +56,6 @@ static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, struct ath_tx_status *ts, int txok, int sendbar); static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, struct list_head *head, bool internal); -static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len); static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, struct ath_tx_status *ts, int nframes, int nbad, int txok, bool update_rc); @@ -845,6 +844,147 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, #undef PADBYTES } +/* + * rix - rate index + * pktlen - total bytes (delims + data + fcs + pads + pad delims) + * 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, int pktlen, + int width, int half_gi, bool shortPreamble) +{ + u32 nbits, nsymbits, duration, nsymbols; + int streams; + + /* find number of symbols: PLCP + data */ + streams = HT_RC_2_STREAMS(rix); + nbits = (pktlen << 3) + OFDM_PLCP_BITS; + nsymbits = bits_per_symbol[rix % 8][width] * streams; + nsymbols = (nbits + nsymbits - 1) / nsymbits; + + if (!half_gi) + duration = SYMBOL_TIME(nsymbols); + else + duration = SYMBOL_TIME_HALFGI(nsymbols); + + /* addup duration for legacy/ht training and signal fields */ + duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); + + return duration; +} + +static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath9k_11n_rate_series series[4]; + struct sk_buff *skb; + struct ieee80211_tx_info *tx_info; + struct ieee80211_tx_rate *rates; + const struct ieee80211_rate *rate; + struct ieee80211_hdr *hdr; + int i, flags = 0; + u8 rix = 0, ctsrate = 0; + bool is_pspoll; + + memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); + + skb = bf->bf_mpdu; + tx_info = IEEE80211_SKB_CB(skb); + rates = tx_info->control.rates; + hdr = (struct ieee80211_hdr *)skb->data; + is_pspoll = ieee80211_is_pspoll(hdr->frame_control); + + /* + * We check if Short Preamble is needed for the CTS rate by + * checking the BSS's global flag. + * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. + */ + rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info); + ctsrate = rate->hw_value; + if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) + ctsrate |= rate->hw_value_short; + + for (i = 0; i < 4; i++) { + bool is_40, is_sgi, is_sp; + int phy; + + if (!rates[i].count || (rates[i].idx < 0)) + continue; + + rix = rates[i].idx; + series[i].Tries = rates[i].count; + + if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) { + series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; + flags |= ATH9K_TXDESC_RTSENA; + } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { + series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; + flags |= ATH9K_TXDESC_CTSENA; + } + + if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + series[i].RateFlags |= ATH9K_RATESERIES_2040; + if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) + series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; + + is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); + is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); + is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); + + if (rates[i].flags & IEEE80211_TX_RC_MCS) { + /* MCS rates */ + series[i].Rate = rix | 0x80; + series[i].ChSel = ath_txchainmask_reduction(sc, + ah->txchainmask, series[i].Rate); + series[i].PktDuration = ath_pkt_duration(sc, rix, len, + is_40, is_sgi, is_sp); + if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC)) + series[i].RateFlags |= ATH9K_RATESERIES_STBC; + continue; + } + + /* legacy rates */ + if ((tx_info->band == IEEE80211_BAND_2GHZ) && + !(rate->flags & IEEE80211_RATE_ERP_G)) + phy = WLAN_RC_PHY_CCK; + else + phy = WLAN_RC_PHY_OFDM; + + rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx]; + series[i].Rate = rate->hw_value; + if (rate->hw_value_short) { + if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) + series[i].Rate |= rate->hw_value_short; + } else { + is_sp = false; + } + + if (bf->bf_state.bfs_paprd) + series[i].ChSel = ah->txchainmask; + else + series[i].ChSel = ath_txchainmask_reduction(sc, + ah->txchainmask, series[i].Rate); + + series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, + phy, rate->bitrate * 100, len, rix, is_sp); + } + + /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ + if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit)) + flags &= ~ATH9K_TXDESC_RTSENA; + + /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ + if (flags & ATH9K_TXDESC_RTSENA) + flags &= ~ATH9K_TXDESC_CTSENA; + + /* set dur_update_en for l-sig computation except for PS-Poll frames */ + ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, + bf->bf_lastbf->bf_desc, + !is_pspoll, ctsrate, + 0, series, 4, flags); + +} + static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, int len) { struct ath_hw *ah = sc->sc_ah; @@ -1613,35 +1753,6 @@ static int setup_tx_flags(struct sk_buff *skb) return flags; } -/* - * rix - rate index - * pktlen - total bytes (delims + data + fcs + pads + pad delims) - * 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, int pktlen, - int width, int half_gi, bool shortPreamble) -{ - u32 nbits, nsymbits, duration, nsymbols; - int streams; - - /* find number of symbols: PLCP + data */ - streams = HT_RC_2_STREAMS(rix); - nbits = (pktlen << 3) + OFDM_PLCP_BITS; - nsymbits = bits_per_symbol[rix % 8][width] * streams; - nsymbols = (nbits + nsymbits - 1) / nsymbits; - - if (!half_gi) - duration = SYMBOL_TIME(nsymbols); - else - duration = SYMBOL_TIME_HALFGI(nsymbols); - - /* addup duration for legacy/ht training and signal fields */ - duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); - - return duration; -} - u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate) { struct ath_hw *ah = sc->sc_ah; @@ -1654,118 +1765,6 @@ u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate) return chainmask; } -static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath9k_11n_rate_series series[4]; - struct sk_buff *skb; - struct ieee80211_tx_info *tx_info; - struct ieee80211_tx_rate *rates; - const struct ieee80211_rate *rate; - struct ieee80211_hdr *hdr; - int i, flags = 0; - u8 rix = 0, ctsrate = 0; - bool is_pspoll; - - memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); - - skb = bf->bf_mpdu; - tx_info = IEEE80211_SKB_CB(skb); - rates = tx_info->control.rates; - hdr = (struct ieee80211_hdr *)skb->data; - is_pspoll = ieee80211_is_pspoll(hdr->frame_control); - - /* - * We check if Short Preamble is needed for the CTS rate by - * checking the BSS's global flag. - * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. - */ - rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info); - ctsrate = rate->hw_value; - if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) - ctsrate |= rate->hw_value_short; - - for (i = 0; i < 4; i++) { - bool is_40, is_sgi, is_sp; - int phy; - - if (!rates[i].count || (rates[i].idx < 0)) - continue; - - rix = rates[i].idx; - series[i].Tries = rates[i].count; - - if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) { - series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; - flags |= ATH9K_TXDESC_RTSENA; - } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { - series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; - flags |= ATH9K_TXDESC_CTSENA; - } - - if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) - series[i].RateFlags |= ATH9K_RATESERIES_2040; - if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) - series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; - - is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); - is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); - is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); - - if (rates[i].flags & IEEE80211_TX_RC_MCS) { - /* MCS rates */ - series[i].Rate = rix | 0x80; - series[i].ChSel = ath_txchainmask_reduction(sc, - ah->txchainmask, series[i].Rate); - series[i].PktDuration = ath_pkt_duration(sc, rix, len, - is_40, is_sgi, is_sp); - if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC)) - series[i].RateFlags |= ATH9K_RATESERIES_STBC; - continue; - } - - /* legacy rates */ - if ((tx_info->band == IEEE80211_BAND_2GHZ) && - !(rate->flags & IEEE80211_RATE_ERP_G)) - phy = WLAN_RC_PHY_CCK; - else - phy = WLAN_RC_PHY_OFDM; - - rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx]; - series[i].Rate = rate->hw_value; - if (rate->hw_value_short) { - if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) - series[i].Rate |= rate->hw_value_short; - } else { - is_sp = false; - } - - if (bf->bf_state.bfs_paprd) - series[i].ChSel = ah->txchainmask; - else - series[i].ChSel = ath_txchainmask_reduction(sc, - ah->txchainmask, series[i].Rate); - - series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, - phy, rate->bitrate * 100, len, rix, is_sp); - } - - /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ - if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit)) - flags &= ~ATH9K_TXDESC_RTSENA; - - /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ - if (flags & ATH9K_TXDESC_RTSENA) - flags &= ~ATH9K_TXDESC_CTSENA; - - /* set dur_update_en for l-sig computation except for PS-Poll frames */ - ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, - bf->bf_lastbf->bf_desc, - !is_pspoll, ctsrate, - 0, series, 4, flags); - -} - /* * Assign a descriptor (and sequence number if necessary, * and map buffer for DMA. Frees skb on error