From 2681b20ba2a255ea20a168c0ebe519c40b55e57e Mon Sep 17 00:00:00 2001 From: Wey-Yi Guy Date: Thu, 21 May 2009 13:44:22 -0700 Subject: iwlwifi: add Greenfield support for 11n Add "Greenfield" support for all devices except 4965 and 3945. "Greenfield" is part of 11n features to improve HT performance. Signed-off-by: Wey-Yi Guy Signed-off-by: Reinette Chatre Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-agn-rs.c | 34 ++++++++++++++++++------------- 1 file changed, 20 insertions(+), 14 deletions(-) (limited to 'drivers/net/wireless/iwlwifi') diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c index 4c88e8715df..a1b0ff56bc3 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c @@ -652,19 +652,19 @@ static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, return 1; } -/* FIXME:RS: in 4965 we don't use greenfield at all */ -/* FIXME:RS: don't use greenfield for now in TX */ -#if 0 -static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) +/* in 4965 we don't use greenfield at all */ +static inline u8 rs_use_green(struct iwl_priv *priv, + struct ieee80211_conf *conf) { - return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && - priv->current_ht_config.is_green_field && - !priv->current_ht_config.non_GF_STA_present; -} -#endif -static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) -{ - return 0; + u8 is_green; + + if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) + is_green = 0; + else + is_green = (conf_is_ht(conf) && + priv->current_ht_config.is_green_field && + !priv->current_ht_config.non_GF_STA_present); + return is_green; } /** @@ -2061,6 +2061,10 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, active_tbl = 1 - lq_sta->active_tbl; tbl = &(lq_sta->lq_info[active_tbl]); + if (is_legacy(tbl->lq_type)) + lq_sta->is_green = 0; + else + lq_sta->is_green = rs_use_green(priv, conf); is_green = lq_sta->is_green; /* current tx rate */ @@ -2896,7 +2900,8 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); desc += sprintf(buff+desc, " %s", (tbl->is_fat) ? "40MHz" : "20MHz"); - desc += sprintf(buff+desc, " %s\n", (tbl->is_SGI) ? "SGI" : ""); + desc += sprintf(buff+desc, " %s %s\n", (tbl->is_SGI) ? "SGI" : "", + (lq_sta->is_green) ? "GF enabled" : ""); } desc += sprintf(buff+desc, "last tx rate=0x%X\n", lq_sta->last_rate_n_flags); @@ -2959,13 +2964,14 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, return -ENOMEM; for (i = 0; i < LQ_SIZE; i++) { - desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" + desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d GF=%d\n" "rate=0x%X\n", lq_sta->active_tbl == i ? "*" : "x", lq_sta->lq_info[i].lq_type, lq_sta->lq_info[i].is_SGI, lq_sta->lq_info[i].is_fat, lq_sta->lq_info[i].is_dup, + lq_sta->is_green, lq_sta->lq_info[i].current_rate); for (j = 0; j < IWL_RATE_COUNT; j++) { desc += sprintf(buff+desc, -- cgit v1.2.3