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ath9k: move ath_buf_set_rate to remove a forward declaration
Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau
John W. Linville
parent
399c64895d
commit
38dad7ba60
@ -56,7 +56,6 @@ static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
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struct ath_tx_status *ts, int txok, int sendbar);
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static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq,
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struct list_head *head, bool internal);
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static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len);
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static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf,
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struct ath_tx_status *ts, int nframes, int nbad,
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int txok, bool update_rc);
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@ -845,6 +844,147 @@ static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc,
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#undef PADBYTES
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}
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/*
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* rix - rate index
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* pktlen - total bytes (delims + data + fcs + pads + pad delims)
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* width - 0 for 20 MHz, 1 for 40 MHz
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* half_gi - to use 4us v/s 3.6 us for symbol time
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*/
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static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, int pktlen,
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int width, int half_gi, bool shortPreamble)
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{
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u32 nbits, nsymbits, duration, nsymbols;
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int streams;
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/* find number of symbols: PLCP + data */
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streams = HT_RC_2_STREAMS(rix);
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nbits = (pktlen << 3) + OFDM_PLCP_BITS;
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nsymbits = bits_per_symbol[rix % 8][width] * streams;
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nsymbols = (nbits + nsymbits - 1) / nsymbits;
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if (!half_gi)
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duration = SYMBOL_TIME(nsymbols);
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else
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duration = SYMBOL_TIME_HALFGI(nsymbols);
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/* addup duration for legacy/ht training and signal fields */
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duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams);
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return duration;
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}
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static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len)
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{
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struct ath_hw *ah = sc->sc_ah;
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struct ath9k_11n_rate_series series[4];
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struct sk_buff *skb;
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struct ieee80211_tx_info *tx_info;
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struct ieee80211_tx_rate *rates;
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const struct ieee80211_rate *rate;
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struct ieee80211_hdr *hdr;
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int i, flags = 0;
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u8 rix = 0, ctsrate = 0;
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bool is_pspoll;
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memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
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skb = bf->bf_mpdu;
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tx_info = IEEE80211_SKB_CB(skb);
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rates = tx_info->control.rates;
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hdr = (struct ieee80211_hdr *)skb->data;
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is_pspoll = ieee80211_is_pspoll(hdr->frame_control);
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/*
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* We check if Short Preamble is needed for the CTS rate by
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* checking the BSS's global flag.
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* But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used.
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*/
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rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info);
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ctsrate = rate->hw_value;
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if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
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ctsrate |= rate->hw_value_short;
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for (i = 0; i < 4; i++) {
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bool is_40, is_sgi, is_sp;
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int phy;
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if (!rates[i].count || (rates[i].idx < 0))
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continue;
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rix = rates[i].idx;
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series[i].Tries = rates[i].count;
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if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
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series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
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flags |= ATH9K_TXDESC_RTSENA;
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} else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
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series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
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flags |= ATH9K_TXDESC_CTSENA;
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}
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if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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series[i].RateFlags |= ATH9K_RATESERIES_2040;
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if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
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series[i].RateFlags |= ATH9K_RATESERIES_HALFGI;
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is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI);
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is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH);
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is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
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if (rates[i].flags & IEEE80211_TX_RC_MCS) {
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/* MCS rates */
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series[i].Rate = rix | 0x80;
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series[i].ChSel = ath_txchainmask_reduction(sc,
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ah->txchainmask, series[i].Rate);
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series[i].PktDuration = ath_pkt_duration(sc, rix, len,
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is_40, is_sgi, is_sp);
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if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC))
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series[i].RateFlags |= ATH9K_RATESERIES_STBC;
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continue;
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}
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/* legacy rates */
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if ((tx_info->band == IEEE80211_BAND_2GHZ) &&
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!(rate->flags & IEEE80211_RATE_ERP_G))
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phy = WLAN_RC_PHY_CCK;
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else
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phy = WLAN_RC_PHY_OFDM;
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rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx];
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series[i].Rate = rate->hw_value;
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if (rate->hw_value_short) {
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if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
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series[i].Rate |= rate->hw_value_short;
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} else {
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is_sp = false;
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}
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if (bf->bf_state.bfs_paprd)
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series[i].ChSel = ah->txchainmask;
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else
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series[i].ChSel = ath_txchainmask_reduction(sc,
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ah->txchainmask, series[i].Rate);
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series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah,
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phy, rate->bitrate * 100, len, rix, is_sp);
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}
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/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
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if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit))
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flags &= ~ATH9K_TXDESC_RTSENA;
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/* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */
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if (flags & ATH9K_TXDESC_RTSENA)
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flags &= ~ATH9K_TXDESC_CTSENA;
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/* set dur_update_en for l-sig computation except for PS-Poll frames */
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ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc,
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bf->bf_lastbf->bf_desc,
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!is_pspoll, ctsrate,
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0, series, 4, flags);
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}
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static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, int len)
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{
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struct ath_hw *ah = sc->sc_ah;
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@ -1613,35 +1753,6 @@ static int setup_tx_flags(struct sk_buff *skb)
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return flags;
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}
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/*
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* rix - rate index
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* pktlen - total bytes (delims + data + fcs + pads + pad delims)
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* width - 0 for 20 MHz, 1 for 40 MHz
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* half_gi - to use 4us v/s 3.6 us for symbol time
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*/
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static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, int pktlen,
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int width, int half_gi, bool shortPreamble)
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{
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u32 nbits, nsymbits, duration, nsymbols;
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int streams;
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/* find number of symbols: PLCP + data */
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streams = HT_RC_2_STREAMS(rix);
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nbits = (pktlen << 3) + OFDM_PLCP_BITS;
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nsymbits = bits_per_symbol[rix % 8][width] * streams;
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nsymbols = (nbits + nsymbits - 1) / nsymbits;
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if (!half_gi)
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duration = SYMBOL_TIME(nsymbols);
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else
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duration = SYMBOL_TIME_HALFGI(nsymbols);
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/* addup duration for legacy/ht training and signal fields */
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duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams);
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return duration;
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}
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u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate)
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{
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struct ath_hw *ah = sc->sc_ah;
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@ -1654,118 +1765,6 @@ u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate)
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return chainmask;
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}
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static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len)
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{
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struct ath_hw *ah = sc->sc_ah;
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struct ath9k_11n_rate_series series[4];
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struct sk_buff *skb;
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struct ieee80211_tx_info *tx_info;
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struct ieee80211_tx_rate *rates;
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const struct ieee80211_rate *rate;
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struct ieee80211_hdr *hdr;
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int i, flags = 0;
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u8 rix = 0, ctsrate = 0;
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bool is_pspoll;
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memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
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skb = bf->bf_mpdu;
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tx_info = IEEE80211_SKB_CB(skb);
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rates = tx_info->control.rates;
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hdr = (struct ieee80211_hdr *)skb->data;
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is_pspoll = ieee80211_is_pspoll(hdr->frame_control);
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/*
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* We check if Short Preamble is needed for the CTS rate by
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* checking the BSS's global flag.
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* But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used.
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*/
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rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info);
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ctsrate = rate->hw_value;
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if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
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ctsrate |= rate->hw_value_short;
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for (i = 0; i < 4; i++) {
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bool is_40, is_sgi, is_sp;
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int phy;
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if (!rates[i].count || (rates[i].idx < 0))
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continue;
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rix = rates[i].idx;
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series[i].Tries = rates[i].count;
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if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
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series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
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flags |= ATH9K_TXDESC_RTSENA;
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} else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
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series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
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flags |= ATH9K_TXDESC_CTSENA;
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}
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if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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series[i].RateFlags |= ATH9K_RATESERIES_2040;
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if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
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series[i].RateFlags |= ATH9K_RATESERIES_HALFGI;
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is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI);
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is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH);
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is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
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if (rates[i].flags & IEEE80211_TX_RC_MCS) {
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/* MCS rates */
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series[i].Rate = rix | 0x80;
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series[i].ChSel = ath_txchainmask_reduction(sc,
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ah->txchainmask, series[i].Rate);
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series[i].PktDuration = ath_pkt_duration(sc, rix, len,
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is_40, is_sgi, is_sp);
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if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC))
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series[i].RateFlags |= ATH9K_RATESERIES_STBC;
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continue;
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}
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/* legacy rates */
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if ((tx_info->band == IEEE80211_BAND_2GHZ) &&
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!(rate->flags & IEEE80211_RATE_ERP_G))
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phy = WLAN_RC_PHY_CCK;
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else
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phy = WLAN_RC_PHY_OFDM;
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rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx];
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series[i].Rate = rate->hw_value;
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if (rate->hw_value_short) {
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if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
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series[i].Rate |= rate->hw_value_short;
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} else {
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is_sp = false;
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}
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if (bf->bf_state.bfs_paprd)
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series[i].ChSel = ah->txchainmask;
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else
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series[i].ChSel = ath_txchainmask_reduction(sc,
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ah->txchainmask, series[i].Rate);
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series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah,
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phy, rate->bitrate * 100, len, rix, is_sp);
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}
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/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
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if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit))
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flags &= ~ATH9K_TXDESC_RTSENA;
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/* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */
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if (flags & ATH9K_TXDESC_RTSENA)
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flags &= ~ATH9K_TXDESC_CTSENA;
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/* set dur_update_en for l-sig computation except for PS-Poll frames */
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ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc,
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bf->bf_lastbf->bf_desc,
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!is_pspoll, ctsrate,
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0, series, 4, flags);
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}
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/*
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* Assign a descriptor (and sequence number if necessary,
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* and map buffer for DMA. Frees skb on error
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