return rate;
}
-static void ath_rc_rate_set_series(struct ath_rate_table *rate_table ,
+static void ath_rc_rate_set_series(struct ath_rate_table *rate_table,
struct ieee80211_tx_rate *rate,
+ struct ieee80211_tx_rate_control *txrc,
u8 tries, u8 rix, int rtsctsenable)
{
rate->count = tries;
rate->idx = rix;
- if (rtsctsenable)
+ if (txrc->short_preamble)
+ rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
+ if (txrc->rts || rtsctsenable)
rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
if (WLAN_RC_PHY_40(rate_table->info[rix].phy))
rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
rate->flags |= IEEE80211_TX_RC_MCS;
}
+static void ath_rc_rate_set_rtscts(struct ath_softc *sc,
+ struct ath_rate_table *rate_table,
+ struct ieee80211_tx_info *tx_info)
+{
+ struct ieee80211_tx_rate *rates = tx_info->control.rates;
+ int i = 0, rix = 0, cix, enable_g_protection = 0;
+
+ /* get the cix for the lowest valid rix */
+ for (i = 3; i >= 0; i--) {
+ if (rates[i].count && (rates[i].idx >= 0)) {
+ rix = rates[i].idx;
+ break;
+ }
+ }
+ cix = rate_table->info[rix].ctrl_rate;
+
+ /* All protection frames are transmited at 2Mb/s for 802.11g,
+ * otherwise we transmit them at 1Mb/s */
+ if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ &&
+ !conf_is_ht(&sc->hw->conf))
+ enable_g_protection = 1;
+
+ /*
+ * 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_flags & SC_OP_PROTECT_ENABLE) &&
+ !(tx_info->flags & IEEE80211_TX_CTL_NO_ACK) &&
+ (rate_table->info[rix].phy == WLAN_RC_PHY_OFDM ||
+ WLAN_RC_PHY_HT(rate_table->info[rix].phy))) {
+ rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
+ cix = rate_table->info[enable_g_protection].ctrl_rate;
+ }
+
+ tx_info->control.rts_cts_rate_idx = cix;
+}
+
static u8 ath_rc_rate_getidx(struct ath_softc *sc,
struct ath_rate_priv *ath_rc_priv,
struct ath_rate_table *rate_table,
struct sk_buff *skb = txrc->skb;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *rates = tx_info->control.rates;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ __le16 fc = hdr->frame_control;
u8 try_per_rate = 0, i = 0, rix, nrix;
int is_probe = 0;
if (is_probe) {
/* set one try for probe rates. For the
* probes don't enable rts */
- ath_rc_rate_set_series(rate_table, &rates[i++],
+ ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
1, nrix, 0);
try_per_rate = (ATH_11N_TXMAXTRY/4);
*/
nrix = ath_rc_rate_getidx(sc, ath_rc_priv,
rate_table, nrix, 1, 0);
- ath_rc_rate_set_series(rate_table, &rates[i++],
+ ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
try_per_rate, nrix, 0);
} else {
try_per_rate = (ATH_11N_TXMAXTRY/4);
/* Set the choosen rate. No RTS for first series entry. */
- ath_rc_rate_set_series(rate_table, &rates[i++],
+ ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
try_per_rate, nrix, 0);
}
nrix = ath_rc_rate_getidx(sc, ath_rc_priv,
rate_table, nrix, 1, min_rate);
/* All other rates in the series have RTS enabled */
- ath_rc_rate_set_series(rate_table, &rates[i],
+ ath_rc_rate_set_series(rate_table, &rates[i], txrc,
try_num, nrix, 1);
}
rates[3].flags = rates[2].flags;
}
}
+
+ /*
+ * Force hardware to use computed duration for next
+ * fragment by disabling multi-rate retry, which
+ * updates duration based on the multi-rate duration table.
+ *
+ * FIXME: Fix duration
+ */
+ if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK) &&
+ (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;
+ }
+
+ /* Setup RTS/CTS */
+ ath_rc_rate_set_rtscts(sc, rate_table, tx_info);
}
static bool ath_rc_update_per(struct ath_softc *sc,
if (!rateset->rs_nrates) {
/* No working rate, just initialize valid rates */
hi = ath_rc_init_validrates(ath_rc_priv, rate_table,
- ath_rc_priv->ht_cap);
+ ath_rc_priv->ht_cap);
} else {
/* Use intersection of working rates and valid rates */
hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table,
- rateset, ath_rc_priv->ht_cap);
+ rateset, ath_rc_priv->ht_cap);
if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) {
hthi = ath_rc_setvalid_htrates(ath_rc_priv,
- rate_table,
- ht_mcs,
- ath_rc_priv->ht_cap);
+ rate_table,
+ ht_mcs,
+ ath_rc_priv->ht_cap);
}
hi = A_MAX(hi, hthi);
}
if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK)
flags |= ATH9K_TXDESC_NOACK;
- if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
- flags |= ATH9K_TXDESC_RTSENA;
return flags;
}
static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
{
- struct ath_hal *ah = sc->sc_ah;
- struct ath_rate_table *rt;
- struct ath_desc *ds = bf->bf_desc;
- struct ath_desc *lastds = bf->bf_lastbf->bf_desc;
+ struct ath_rate_table *rt = sc->cur_rate_table;
struct ath9k_11n_rate_series series[4];
struct sk_buff *skb;
struct ieee80211_tx_info *tx_info;
struct ieee80211_tx_rate *rates;
- struct ieee80211_hdr *hdr;
- struct ieee80211_hw *hw = sc->hw;
- int i, flags, rtsctsena = 0, enable_g_protection = 0;
- u32 ctsduration = 0;
- u8 rix = 0, cix, ctsrate = 0;
- __le16 fc;
+ int i, flags = 0;
+ u8 rix = 0, ctsrate = 0;
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->control.rates;
- 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->cur_rate_table;
- for (i = 3; i >= 0; i--) {
- 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].ctrl_rate;
-
- /* All protection frames are transmited at 2Mb/s for 802.11g,
- * otherwise we transmit them at 1Mb/s */
- if (hw->conf.channel->band == IEEE80211_BAND_2GHZ &&
- !conf_is_ht(&hw->conf))
- enable_g_protection = 1;
-
/*
- * 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.
+ * 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.
*/
- if (sc->sc_protmode != PROT_M_NONE && !(bf->bf_flags & ATH9K_TXDESC_NOACK)
- && (rt->info[rix].phy == WLAN_RC_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[enable_g_protection].ctrl_rate;
- rtsctsena = 1;
- }
+ if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
+ ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode |
+ rt->info[tx_info->control.rts_cts_rate_idx].short_preamble;
+ else
+ ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode;
- /* 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.
+ /*
+ * ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive.
+ * Check the first rate in the series to decide whether RTS/CTS
+ * or CTS-to-self has to be used.
*/
- if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) && bf_isdata(bf)) {
- /* 802.11g protection not needed, use our default behavior */
- if (!rtsctsena)
- flags = ATH9K_TXDESC_RTSENA;
- }
+ if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
+ flags = ATH9K_TXDESC_CTSENA;
+ else if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
+ flags = ATH9K_TXDESC_RTSENA;
- /* Set protection if aggregate protection on */
+ /* FIXME: Handle aggregation protection */
if (sc->sc_config.ath_aggr_prot &&
(!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) {
flags = ATH9K_TXDESC_RTSENA;
- cix = rt->info[enable_g_protection].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))
+ if (bf_isaggr(bf) && (bf->bf_al > sc->sc_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
- */
- ctsrate = rt->info[cix].ratecode |
- (bf_isshpreamble(bf) ? rt->info[cix].short_preamble : 0);
-
for (i = 0; i < 4; i++) {
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].short_preamble : 0);
-
series[i].Tries = rates[i].count;
+ series[i].ChSel = sc->sc_tx_chainmask;
- series[i].RateFlags = (
- (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) ?
- ATH9K_RATESERIES_RTS_CTS : 0) |
- ((rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ?
- ATH9K_RATESERIES_2040 : 0) |
- ((rates[i].flags & IEEE80211_TX_RC_SHORT_GI) ?
- ATH9K_RATESERIES_HALFGI : 0);
+ if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
+ series[i].Rate = rt->info[rix].ratecode |
+ rt->info[rix].short_preamble;
+ else
+ series[i].Rate = rt->info[rix].ratecode;
+
+ if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)
+ series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
+ 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;
series[i].PktDuration = ath_pkt_duration(sc, rix, bf,
(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) != 0,
(rates[i].flags & IEEE80211_TX_RC_SHORT_GI),
- bf_isshpreamble(bf));
-
- series[i].ChSel = sc->sc_tx_chainmask;
-
- if (rtsctsena)
- series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
+ (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE));
}
/* 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);
+ ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc,
+ bf->bf_lastbf->bf_desc,
+ !bf_ispspoll(bf), ctsrate,
+ 0, series, 4, flags);
if (sc->sc_config.ath_aggr_prot && flags)
- ath9k_hw_set11n_burstduration(ah, ds, 8192);
+ ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192);
}
static int ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
bf->bf_state.bf_type |= BUF_BAR;
if (ieee80211_is_pspoll(fc))
bf->bf_state.bf_type |= BUF_PSPOLL;
- if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
- bf->bf_state.bf_type |= BUF_SHORT_PREAMBLE;
if ((conf_is_ht(&sc->hw->conf) && !is_pae(skb) &&
(tx_info->flags & IEEE80211_TX_CTL_AMPDU)))
bf->bf_state.bf_type |= BUF_HT;
git.openpandora.org / pandora-kernel.git / commitdiff