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);
#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;
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;
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
projects / karo-tx-linux.git / commitdiff