iwlwifi: 802.11n comply HT self configuration flow with mac80211 framework

This patch conforms HW configuration changes according to new mac80211's
HT framework

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -87,8 +87,8 @@ static int is_fat_channel(__le32 rxon_flags)
 static u8 is_single_stream(struct iwl4965_priv *priv)
 {
 #ifdef CONFIG_IWL4965_HT
-	if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht ||
-	    (priv->active_rate_ht[1] == 0) ||
+	if (!priv->current_ht_config.is_ht ||
+	    (priv->current_ht_config.supp_mcs_set[1] == 0) ||
 	    (priv->ps_mode == IWL_MIMO_PS_STATIC))
 		return 1;
 #else
@@ -4541,27 +4541,27 @@ static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv, int phymode,
 }
 
 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
-				const struct sta_ht_info *ht_info)
+				struct ieee80211_ht_info *sta_ht_inf)
 {
+	struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 
-	if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
+	if ((!iwl_ht_conf->is_ht) ||
+	   (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
+	   (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
 		return 0;
 
-	if (ht_info->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ)
-		return 0;
-
-	if (ht_info->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
-		return 0;
+	if (sta_ht_inf) {
+		if ((!sta_ht_inf->ht_supported) ||
+		   (!sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH))
+			return 0;
+	}
 
-	/* no fat tx allowed on 2.4GHZ */
-	if (priv->phymode != MODE_IEEE80211A)
-		return 0;
 	return (iwl4965_is_channel_extension(priv, priv->phymode,
-					 ht_info->control_channel,
-					 ht_info->extension_chan_offset));
+					 iwl_ht_conf->control_channel,
+					 iwl_ht_conf->extension_chan_offset));
 }
 
-void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct sta_ht_info *ht_info)
+void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
 {
 	struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 	u32 val;
@@ -4570,7 +4570,7 @@ void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct sta_ht_info *ht_info)
 		return;
 
 	/* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
-	if (iwl4965_is_fat_tx_allowed(priv, ht_info))
+	if (iwl4965_is_fat_tx_allowed(priv, NULL))
 		rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 	else
 		rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
@@ -4600,20 +4600,18 @@ void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct sta_ht_info *ht_info)
 		break;
 	}
 
-	val = ht_info->operating_mode;
+	val = ht_info->ht_protection;
 
 	rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 
-	priv->active_rate_ht[0] = ht_info->supp_rates[0];
-	priv->active_rate_ht[1] = ht_info->supp_rates[1];
 	iwl4965_set_rxon_chain(priv);
 
 	IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
 			"rxon flags 0x%X operation mode :0x%X "
 			"extension channel offset 0x%x "
 			"control chan %d\n",
-			priv->active_rate_ht[0], priv->active_rate_ht[1],
-			le32_to_cpu(rxon->flags), ht_info->operating_mode,
+			ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
+			le32_to_cpu(rxon->flags), ht_info->ht_protection,
 			ht_info->extension_chan_offset,
 			ht_info->control_channel);
 	return;

drivers/net/wireless/iwlwifi/iwl-4965.h

@@ -766,7 +766,6 @@ extern int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel);
 extern int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index);
 
 struct iwl4965_priv;
-struct sta_ht_info;
 
 /*
  * Forward declare iwl-4965.c functions for iwl-base.c
@@ -779,9 +778,6 @@ extern int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
 					  u16 byte_cnt);
 extern void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr,
 				int is_ap);
-extern void iwl4965_set_rxon_ht(struct iwl4965_priv *priv,
-				struct sta_ht_info *ht_info);
-
 extern void iwl4965_set_rxon_chain(struct iwl4965_priv *priv);
 extern int iwl4965_tx_cmd(struct iwl4965_priv *priv, struct iwl4965_cmd *out_cmd,
 			  u8 sta_id, dma_addr_t txcmd_phys,
@@ -803,6 +799,8 @@ extern void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv);
 #ifdef CONFIG_IWL4965_HT
 extern void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
 					int mode);
+extern void iwl4965_set_rxon_ht(struct iwl4965_priv *priv,
+				struct iwl_ht_info *ht_info);
 #ifdef CONFIG_IWL4965_HT_AGG
 extern int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da,
 				   u16 tid, u16 *start_seq_num);

drivers/net/wireless/iwlwifi/iwl4965-base.c

@@ -2111,7 +2111,7 @@ static void iwl4965_activate_qos(struct iwl4965_priv *priv, u8 force)
 			QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 
 #ifdef CONFIG_IWL4965_HT
-	if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
+	if (priv->current_ht_config.is_ht)
 		priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 #endif /* CONFIG_IWL4965_HT */
 
@@ -7304,13 +7304,8 @@ static void iwl4965_bg_post_associate(struct work_struct *data)
 	priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
 
 #ifdef CONFIG_IWL4965_HT
-	if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
-		iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
-	else {
-		priv->active_rate_ht[0] = 0;
-		priv->active_rate_ht[1] = 0;
-		priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
-	}
+	if (priv->current_ht_config.is_ht)
+		iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
 #endif /* CONFIG_IWL4965_HT*/
 	iwl4965_set_rxon_chain(priv);
 	priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
@@ -8112,7 +8107,7 @@ static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
 	priv->lq_mngr.lq_ready = 0;
 #ifdef CONFIG_IWL4965_HT
 	spin_lock_irqsave(&priv->lock, flags);
-	memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
+	memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
 	spin_unlock_irqrestore(&priv->lock, flags);
 #ifdef CONFIG_IWL4965_HT_AGG
 /*	if (priv->lq_mngr.agg_ctrl.granted_ba)
@@ -8232,132 +8227,61 @@ static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *sk
 }
 
 #ifdef CONFIG_IWL4965_HT
-union ht_cap_info {
-	struct {
-		u16 advanced_coding_cap		:1;
-		u16 supported_chan_width_set	:1;
-		u16 mimo_power_save_mode	:2;
-		u16 green_field			:1;
-		u16 short_GI20			:1;
-		u16 short_GI40			:1;
-		u16 tx_stbc			:1;
-		u16 rx_stbc			:1;
-		u16 beam_forming		:1;
-		u16 delayed_ba			:1;
-		u16 maximal_amsdu_size		:1;
-		u16 cck_mode_at_40MHz		:1;
-		u16 psmp_support		:1;
-		u16 stbc_ctrl_frame_support	:1;
-		u16 sig_txop_protection_support	:1;
-	};
-	u16 val;
-} __attribute__ ((packed));
-
-union ht_param_info{
-	struct {
-		u8 max_rx_ampdu_factor	:2;
-		u8 mpdu_density		:3;
-		u8 reserved		:3;
-	};
-	u8 val;
-} __attribute__ ((packed));
-
-union ht_exra_param_info {
-	struct {
-		u8 ext_chan_offset		:2;
-		u8 tx_chan_width		:1;
-		u8 rifs_mode			:1;
-		u8 controlled_access_only	:1;
-		u8 service_interval_granularity	:3;
-	};
-	u8 val;
-} __attribute__ ((packed));
-
-union ht_operation_mode{
-	struct {
-		u16 op_mode	:2;
-		u16 non_GF	:1;
-		u16 reserved	:13;
-	};
-	u16 val;
-} __attribute__ ((packed));
 
-
-static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
-			    struct ieee80211_ht_additional_info *ht_extra,
-			    struct sta_ht_info *ht_info_ap,
-			    struct sta_ht_info *ht_info)
+static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
+				 struct iwl4965_priv *priv)
 {
-	union ht_cap_info cap;
-	union ht_operation_mode op_mode;
-	union ht_param_info param_info;
-	union ht_exra_param_info extra_param_info;
+	struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
+	struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
+	struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
 
 	IWL_DEBUG_MAC80211("enter: \n");
 
-	if (!ht_info) {
-		IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
-		return -1;
+	if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
+		iwl_conf->is_ht = 0;
+		return;
 	}
 
-	if (ht_cap) {
-		cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
-		param_info.val = ht_cap->mac_ht_params_info;
-		ht_info->is_ht = 1;
-		if (cap.short_GI20)
-			ht_info->sgf |= 0x1;
-		if (cap.short_GI40)
-			ht_info->sgf |= 0x2;
-		ht_info->is_green_field = cap.green_field;
-		ht_info->max_amsdu_size = cap.maximal_amsdu_size;
-		ht_info->supported_chan_width = cap.supported_chan_width_set;
-		ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
-		memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
-
-		ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
-		ht_info->mpdu_density = param_info.mpdu_density;
-
-		IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
-				    ht_cap->supported_mcs_set[0],
-				    ht_cap->supported_mcs_set[1]);
-
-		if (ht_info_ap) {
-			ht_info->control_channel = ht_info_ap->control_channel;
-			ht_info->extension_chan_offset =
-				ht_info_ap->extension_chan_offset;
-			ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
-			ht_info->operating_mode = ht_info_ap->operating_mode;
-		}
-
-		if (ht_extra) {
-			extra_param_info.val = ht_extra->ht_param;
-			ht_info->control_channel = ht_extra->control_chan;
-			ht_info->extension_chan_offset =
-			    extra_param_info.ext_chan_offset;
-			ht_info->tx_chan_width = extra_param_info.tx_chan_width;
-			op_mode.val = (u16)
-			    le16_to_cpu(ht_extra->operation_mode);
-			ht_info->operating_mode = op_mode.op_mode;
-			IWL_DEBUG_MAC80211("control channel %d\n",
-					    ht_extra->control_chan);
-		}
-	} else
-		ht_info->is_ht = 0;
-
+	iwl_conf->is_ht = 1;
+	priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
+
+	if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
+		iwl_conf->sgf |= 0x1;
+	if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
+		iwl_conf->sgf |= 0x2;
+
+	iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
+	iwl_conf->max_amsdu_size =
+		!!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
+	iwl_conf->supported_chan_width =
+		!!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
+	iwl_conf->tx_mimo_ps_mode =
+		(u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
+	memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
+
+	iwl_conf->control_channel = ht_bss_conf->primary_channel;
+	iwl_conf->extension_chan_offset =
+		ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
+	iwl_conf->tx_chan_width =
+		!!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
+	iwl_conf->ht_protection =
+		ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
+	iwl_conf->non_GF_STA_present =
+		!!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
+
+	IWL_DEBUG_MAC80211("control channel %d\n",
+		iwl_conf->control_channel);
 	IWL_DEBUG_MAC80211("leave\n");
-	return 0;
 }
 
 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
-			   struct ieee80211_ht_capability *ht_cap,
-			   struct ieee80211_ht_additional_info *ht_extra)
+			       struct ieee80211_conf *conf)
 {
 	struct iwl4965_priv *priv = hw->priv;
-	int rs;
 
 	IWL_DEBUG_MAC80211("enter: \n");
 
-	rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
+	iwl4965_ht_info_fill(conf, priv);
 	iwl4965_set_rxon_chain(priv);
 
 	if (priv && priv->assoc_id &&
@@ -8372,10 +8296,8 @@ static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
 		spin_unlock_irqrestore(&priv->lock, flags);
 	}
 
-	IWL_DEBUG_MAC80211("leave: control channel %d\n",
-			ht_extra->control_chan);
-	return rs;
-
+	IWL_DEBUG_MAC80211("leave:\n");
+	return 0;
 }
 
 static void iwl4965_set_ht_capab(struct ieee80211_hw *hw,
@@ -8400,23 +8322,6 @@ static void iwl4965_set_ht_capab(struct ieee80211_hw *hw,
 					IEEE80211_HT_CAP_AMPDU_DENSITY);
 }
 
-static void iwl4965_mac_get_ht_capab(struct ieee80211_hw *hw,
-				 struct ieee80211_ht_capability *ht_cap)
-{
-	u8 use_wide_channel = 1;
-	struct iwl4965_priv *priv = hw->priv;
-
-	IWL_DEBUG_MAC80211("enter: \n");
-	if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
-		use_wide_channel = 0;
-
-	/* no fat tx allowed on 2.4GHZ */
-	if (priv->phymode != MODE_IEEE80211A)
-		use_wide_channel = 0;
-
-	iwl4965_set_ht_capab(hw, ht_cap, use_wide_channel);
-	IWL_DEBUG_MAC80211("leave: \n");
-}
 #endif /*CONFIG_IWL4965_HT*/
 
 /*****************************************************************************
@@ -9134,7 +9039,6 @@ static struct ieee80211_ops iwl4965_hw_ops = {
 	.erp_ie_changed = iwl4965_mac_erp_ie_changed,
 #ifdef CONFIG_IWL4965_HT
 	.conf_ht = iwl4965_mac_conf_ht,
-	.get_ht_capab = iwl4965_mac_get_ht_capab,
 #ifdef CONFIG_IWL4965_HT_AGG
 	.ht_tx_agg_start = iwl4965_mac_ht_tx_agg_start,
 	.ht_tx_agg_stop = iwl4965_mac_ht_tx_agg_stop,