diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath9k/rc.c | 121 |
1 files changed, 92 insertions, 29 deletions
diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c index 18d19c3..6d7e636 100644 --- a/drivers/net/wireless/ath9k/rc.c +++ b/drivers/net/wireless/ath9k/rc.c @@ -1387,42 +1387,18 @@ static struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc, static void ath_rc_init(struct ath_softc *sc, struct ath_rate_priv *ath_rc_priv, struct ieee80211_supported_band *sband, - struct ieee80211_sta *sta) + struct ieee80211_sta *sta, + struct ath_rate_table *rate_table) { - struct ath_rate_table *rate_table = NULL; struct ath_rateset *rateset = &ath_rc_priv->neg_rates; u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates; u8 i, j, k, hi = 0, hthi = 0; - struct ath_hw *ah = sc->sc_ah; - - /* FIXME: Adhoc */ - if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) || - (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) { - bool is_cw_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; - rate_table = ath_choose_rate_table(sc, sband->band, - sta->ht_cap.ht_supported, - is_cw_40); - } else if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { - /* cur_rate_table would be set on init through config() */ - rate_table = sc->cur_rate_table; - } if (!rate_table) { DPRINTF(sc, ATH_DBG_FATAL, "Rate table not initialized\n"); return; } - if (sta->ht_cap.ht_supported) { - ath_rc_priv->ht_cap = WLAN_RC_HT_FLAG; - if (sc->sc_ah->caps.tx_chainmask != 1 && - ath9k_hw_getcapability(ah, ATH9K_CAP_DS, 0, NULL)) - ath_rc_priv->ht_cap |= WLAN_RC_DS_FLAG; - if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) - ath_rc_priv->ht_cap |= WLAN_RC_40_FLAG; - if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) - ath_rc_priv->ht_cap |= WLAN_RC_SGI_FLAG; - } - /* Initial rate table size. Will change depending * on the working rate set */ ath_rc_priv->rate_table_size = RATE_TABLE_SIZE; @@ -1442,7 +1418,7 @@ static void ath_rc_init(struct ath_softc *sc, ath_rc_priv->valid_phy_rateidx[i][j] = 0; ath_rc_priv->valid_phy_ratecnt[i] = 0; } - ath_rc_priv->rc_phy_mode = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG); + ath_rc_priv->rc_phy_mode = ath_rc_priv->ht_cap & WLAN_RC_40_FLAG; /* Set stream capability */ ath_rc_priv->single_stream = (ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG) ? 0 : 1; @@ -1487,9 +1463,34 @@ static void ath_rc_init(struct ath_softc *sc, ath_rc_sort_validrates(rate_table, ath_rc_priv); ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4]; sc->cur_rate_table = rate_table; + + DPRINTF(sc, ATH_DBG_CONFIG, "RC Initialized with capabilities: 0x%x\n", + ath_rc_priv->ht_cap); } -/* Rate Control callbacks */ +static u8 ath_rc_build_ht_caps(struct ath_softc *sc, bool is_ht, bool is_cw40, + bool is_sgi40) +{ + u8 caps = 0; + + if (is_ht) { + caps = WLAN_RC_HT_FLAG; + if (sc->sc_ah->caps.tx_chainmask != 1 && + ath9k_hw_getcapability(sc->sc_ah, ATH9K_CAP_DS, 0, NULL)) + caps |= WLAN_RC_DS_FLAG; + if (is_cw40) + caps |= WLAN_RC_40_FLAG; + if (is_sgi40) + caps |= WLAN_RC_SGI_FLAG; + } + + return caps; +} + +/***********************************/ +/* mac80211 Rate Control callbacks */ +/***********************************/ + static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband, struct ieee80211_sta *sta, void *priv_sta, struct sk_buff *skb) @@ -1585,6 +1586,8 @@ static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband, { struct ath_softc *sc = priv; struct ath_rate_priv *ath_rc_priv = priv_sta; + struct ath_rate_table *rate_table = NULL; + bool is_cw40, is_sgi40; int i, j = 0; for (i = 0; i < sband->n_bitrates; i++) { @@ -1606,7 +1609,66 @@ static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband, ath_rc_priv->neg_ht_rates.rs_nrates = j; } - ath_rc_init(sc, priv_sta, sband, sta); + is_cw40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; + is_sgi40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40; + + /* Choose rate table first */ + + if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) || + (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) { + rate_table = ath_choose_rate_table(sc, sband->band, + sta->ht_cap.ht_supported, + is_cw40); + } else if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { + /* cur_rate_table would be set on init through config() */ + rate_table = sc->cur_rate_table; + } + + ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta->ht_cap.ht_supported, + is_cw40, is_sgi40); + ath_rc_init(sc, priv_sta, sband, sta, rate_table); +} + +static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband, + struct ieee80211_sta *sta, void *priv_sta, + u32 changed) +{ + struct ath_softc *sc = priv; + struct ath_rate_priv *ath_rc_priv = priv_sta; + struct ath_rate_table *rate_table = NULL; + bool oper_cw40 = false, oper_sgi40; + bool local_cw40 = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG) ? + true : false; + bool local_sgi40 = (ath_rc_priv->ht_cap & WLAN_RC_SGI_FLAG) ? + true : false; + + /* FIXME: Handle AP mode later when we support CWM */ + + if (changed & IEEE80211_RC_HT_CHANGED) { + if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) + return; + + if (sc->hw->conf.channel_type == NL80211_CHAN_HT40MINUS || + sc->hw->conf.channel_type == NL80211_CHAN_HT40PLUS) + oper_cw40 = true; + + oper_sgi40 = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ? + true : false; + + if ((local_cw40 != oper_cw40) || (local_sgi40 != oper_sgi40)) { + rate_table = ath_choose_rate_table(sc, sband->band, + sta->ht_cap.ht_supported, + oper_cw40); + ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, + sta->ht_cap.ht_supported, + oper_cw40, oper_sgi40); + ath_rc_init(sc, priv_sta, sband, sta, rate_table); + + DPRINTF(sc, ATH_DBG_CONFIG, + "Operating HT Bandwidth changed to: %d\n", + sc->hw->conf.channel_type); + } + } } static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) @@ -1650,6 +1712,7 @@ static struct rate_control_ops ath_rate_ops = { .tx_status = ath_tx_status, .get_rate = ath_get_rate, .rate_init = ath_rate_init, + .rate_update = ath_rate_update, .alloc = ath_rate_alloc, .free = ath_rate_free, .alloc_sta = ath_rate_alloc_sta, |