mwifiex: add HT operation IE in TDLS setup confirm

This patch adds support to populate HT operatation IE in TDLS
setup confirm command. This is required for setting wider
bandwidths for TDLS operations.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/11n.c

@@ -749,3 +749,45 @@ void mwifiex_set_ba_params(struct mwifiex_private *priv)
 
 	return;
 }
+
+u8 mwifiex_get_sec_chan_offset(int chan)
+{
+	u8 sec_offset;
+
+	switch (chan) {
+	case 36:
+	case 44:
+	case 52:
+	case 60:
+	case 100:
+	case 108:
+	case 116:
+	case 124:
+	case 132:
+	case 140:
+	case 149:
+	case 157:
+		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+		break;
+	case 40:
+	case 48:
+	case 56:
+	case 64:
+	case 104:
+	case 112:
+	case 120:
+	case 128:
+	case 136:
+	case 144:
+	case 153:
+	case 161:
+		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+		break;
+	case 165:
+	default:
+		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
+		break;
+	}
+
+	return sec_offset;
+}

drivers/net/wireless/mwifiex/11n.h

@@ -63,6 +63,7 @@ int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
 				int cmd_action,
 				struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl);
 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra);
+u8 mwifiex_get_sec_chan_offset(int chan);
 
 static inline u8
 mwifiex_is_station_ampdu_allowed(struct mwifiex_private *priv,

drivers/net/wireless/mwifiex/fw.h

@@ -230,6 +230,7 @@ enum MWIFIEX_802_11_PRIVACY_FILTER {
 #define ISENABLED_40MHZ_INTOLERANT(Dot11nDevCap) (Dot11nDevCap & BIT(8))
 #define ISSUPP_RXLDPC(Dot11nDevCap) (Dot11nDevCap & BIT(22))
 #define ISSUPP_BEAMFORMING(Dot11nDevCap) (Dot11nDevCap & BIT(30))
+#define ISALLOWED_CHANWIDTH40(ht_param) (ht_param & BIT(2))
 
 /* httxcfg bitmap
  * 0		reserved

drivers/net/wireless/mwifiex/tdls.c

@@ -185,6 +185,48 @@ static int mwifiex_tdls_add_vht_capab(struct mwifiex_private *priv,
 	return 0;
 }
 
+static int
+mwifiex_tdls_add_ht_oper(struct mwifiex_private *priv, u8 *mac,
+			 u8 vht_enabled, struct sk_buff *skb)
+{
+	struct ieee80211_ht_operation *ht_oper;
+	struct mwifiex_sta_node *sta_ptr;
+	struct mwifiex_bssdescriptor *bss_desc =
+					&priv->curr_bss_params.bss_descriptor;
+	u8 *pos;
+
+	sta_ptr = mwifiex_get_sta_entry(priv, mac);
+	if (unlikely(!sta_ptr)) {
+		dev_warn(priv->adapter->dev,
+			 "TDLS peer station not found in list\n");
+		return -1;
+	}
+
+	pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_operation) + 2);
+	*pos++ = WLAN_EID_HT_OPERATION;
+	*pos++ = sizeof(struct ieee80211_ht_operation);
+	ht_oper = (void *)pos;
+
+	ht_oper->primary_chan = bss_desc->channel;
+
+	/* follow AP's channel bandwidth */
+	if (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&
+	    bss_desc->bcn_ht_cap &&
+	    ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))
+		ht_oper->ht_param = bss_desc->bcn_ht_oper->ht_param;
+
+	if (vht_enabled) {
+		ht_oper->ht_param =
+			  mwifiex_get_sec_chan_offset(bss_desc->channel);
+		ht_oper->ht_param |= BIT(2);
+	}
+
+	memcpy(&sta_ptr->tdls_cap.ht_oper, ht_oper,
+	       sizeof(struct ieee80211_ht_operation));
+
+	return 0;
+}
+
 static int mwifiex_tdls_add_vht_oper(struct mwifiex_private *priv,
 				     u8 *mac, struct sk_buff *skb)
 {
@@ -428,6 +470,17 @@ static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
 				dev_kfree_skb_any(skb);
 				return ret;
 			}
+			ret = mwifiex_tdls_add_ht_oper(priv, peer, 1, skb);
+			if (ret) {
+				dev_kfree_skb_any(skb);
+				return ret;
+			}
+		} else {
+			ret = mwifiex_tdls_add_ht_oper(priv, peer, 0, skb);
+			if (ret) {
+				dev_kfree_skb_any(skb);
+				return ret;
+			}
 		}
 		break;