rsi: roaming enhancements

To support roaming below changes are done:
* Station notify frame is send to firmware after sending assoc
  request. This will avoid dropping of first EAPOL frame due to
  delay in creation of station control block in firmware.
* Data queues are unblocked after sending station notify in open
  mode, after configuring key in WEP mode, and after receiving
  EAPOL4 confirm in WPA mode.
* Initial EAPOL frames priority is chaged to MGMT, rekey EAPOL
  frames priority changed to VO.

Signed-off-by: Prameela Rani Garnepudi <prameela.j04cs@gmail.com>
Signed-off-by: Amitkumar Karwar <amit.karwar@redpinesignals.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_91x_core.c

@@ -411,6 +411,18 @@ void rsi_core_xmit(struct rsi_common *common, struct sk_buff *skb)
 	if ((ieee80211_is_mgmt(wh->frame_control)) ||
 	    (ieee80211_is_ctl(wh->frame_control)) ||
 	    (ieee80211_is_qos_nullfunc(wh->frame_control))) {
+		if (ieee80211_is_assoc_req(wh->frame_control) ||
+		    ieee80211_is_reassoc_req(wh->frame_control)) {
+			struct ieee80211_bss_conf *bss = &vif->bss_conf;
+
+			common->eapol4_confirm = false;
+			rsi_hal_send_sta_notify_frame(common,
+						      RSI_IFTYPE_STATION,
+						      STA_CONNECTED, bss->bssid,
+						      bss->qos, bss->aid, 0,
+						      vif);
+		}
+
 		q_num = MGMT_SOFT_Q;
 		skb->priority = q_num;
 
@@ -450,6 +462,10 @@ void rsi_core_xmit(struct rsi_common *common, struct sk_buff *skb)
 							      tid, 0);
 			}
 		}
+		if (skb->protocol == cpu_to_be16(ETH_P_PAE)) {
+			q_num = MGMT_SOFT_Q;
+			skb->priority = q_num;
+		}
 		if (rsi_prepare_data_desc(common, skb)) {
 			rsi_dbg(ERR_ZONE, "Failed to prepare data desc\n");
 			goto xmit_fail;

drivers/net/wireless/rsi/rsi_91x_hal.c

@@ -232,6 +232,18 @@ int rsi_prepare_data_desc(struct rsi_common *common, struct sk_buff *skb)
 		data_desc->misc_flags |= RSI_FETCH_RETRY_CNT_FRM_HST;
 #define EAPOL_RETRY_CNT 15
 		xtend_desc->retry_cnt = EAPOL_RETRY_CNT;
+
+		if (common->eapol4_confirm)
+			skb->priority = VO_Q;
+		else
+			rsi_set_len_qno(&data_desc->len_qno,
+					(skb->len - FRAME_DESC_SZ),
+					RSI_WIFI_MGMT_Q);
+		if ((skb->len - header_size) == EAPOL4_PACKET_LEN) {
+			data_desc->misc_flags |=
+				RSI_DESC_REQUIRE_CFM_TO_HOST;
+			xtend_desc->confirm_frame_type = EAPOL4_CONFIRM;
+		}
 	}
 
 	data_desc->mac_flags = cpu_to_le16(seq_num & 0xfff);
@@ -271,8 +283,11 @@ int rsi_send_data_pkt(struct rsi_common *common, struct sk_buff *skb)
 	struct rsi_hw *adapter = common->priv;
 	struct ieee80211_vif *vif;
 	struct ieee80211_tx_info *info;
+	struct skb_info *tx_params;
 	struct ieee80211_bss_conf *bss;
+	struct ieee80211_hdr *wh;
 	int status = -EINVAL;
+	u8 header_size;
 
 	if (!skb)
 		return 0;
@@ -284,6 +299,9 @@ int rsi_send_data_pkt(struct rsi_common *common, struct sk_buff *skb)
 		goto err;
 	vif = info->control.vif;
 	bss = &vif->bss_conf;
+	tx_params = (struct skb_info *)info->driver_data;
+	header_size = tx_params->internal_hdr_size;
+	wh = (struct ieee80211_hdr *)&skb->data[header_size];
 
 	if (((vif->type == NL80211_IFTYPE_STATION) ||
 	     (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&

drivers/net/wireless/rsi/rsi_91x_mac80211.c

@@ -737,7 +737,8 @@ static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 				      bss_conf->bssid,
 				      bss_conf->qos,
 				      bss_conf->aid,
-				      NULL, 0, vif);
+				      NULL, 0,
+				      bss_conf->assoc_capability, vif);
 		adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 		adapter->ps_info.listen_interval = conf->listen_interval;
 
@@ -914,6 +915,17 @@ static int rsi_hal_key_config(struct ieee80211_hw *hw,
 				key->cipher,
 				sta_id,
 				vif);
+	if (status)
+		return status;
+
+	if (vif->type == NL80211_IFTYPE_STATION && key->key &&
+	    (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
+	     key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
+		if (!rsi_send_block_unblock_frame(adapter->priv, false))
+			adapter->priv->hw_data_qs_blocked = false;
+	}
+
+	return 0;
 }
 
 /**
@@ -1391,7 +1403,7 @@ static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
 			rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
 			rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
 					      sta->addr, sta->wme, sta->aid,
-					      sta, sta_idx, vif);
+					      sta, sta_idx, 0, vif);
 
 			if (common->key) {
 				struct ieee80211_key_conf *key = common->key;
@@ -1469,7 +1481,7 @@ static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
 				rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
 						      sta->addr, sta->wme,
 						      sta->aid, sta, sta_idx,
-						      vif);
+						      0, vif);
 				rsta->sta = NULL;
 				rsta->sta_id = -1;
 				for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)

drivers/net/wireless/rsi/rsi_91x_mgmt.c

@@ -454,14 +454,10 @@ static int rsi_mgmt_pkt_to_core(struct rsi_common *common,
  *
  * Return: status: 0 on success, corresponding negative error code on failure.
  */
-static int rsi_hal_send_sta_notify_frame(struct rsi_common *common,
-					 enum opmode opmode,
-					 u8 notify_event,
-					 const unsigned char *bssid,
-					 u8 qos_enable,
-					 u16 aid,
-					 u16 sta_id,
-					 struct ieee80211_vif *vif)
+int rsi_hal_send_sta_notify_frame(struct rsi_common *common, enum opmode opmode,
+				  u8 notify_event, const unsigned char *bssid,
+				  u8 qos_enable, u16 aid, u16 sta_id,
+				  struct ieee80211_vif *vif)
 {
 	struct sk_buff *skb = NULL;
 	struct rsi_peer_notify *peer_notify;
@@ -1328,6 +1324,7 @@ void rsi_inform_bss_status(struct rsi_common *common,
 			   u16 aid,
 			   struct ieee80211_sta *sta,
 			   u16 sta_id,
+			   u16 assoc_cap,
 			   struct ieee80211_vif *vif)
 {
 	if (status) {
@@ -1342,10 +1339,10 @@ void rsi_inform_bss_status(struct rsi_common *common,
 					      vif);
 		if (common->min_rate == 0xffff)
 			rsi_send_auto_rate_request(common, sta, sta_id, vif);
-		if (opmode == RSI_OPMODE_STA) {
-			if (!rsi_send_block_unblock_frame(common, false))
-				common->hw_data_qs_blocked = false;
-		}
+		if (opmode == RSI_OPMODE_STA &&
+		    !(assoc_cap & WLAN_CAPABILITY_PRIVACY) &&
+		    !rsi_send_block_unblock_frame(common, false))
+			common->hw_data_qs_blocked = false;
 	} else {
 		if (opmode == RSI_OPMODE_STA)
 			common->hw_data_qs_blocked = true;
@@ -1850,10 +1847,19 @@ int rsi_mgmt_pkt_recv(struct rsi_common *common, u8 *msg)
 			__func__);
 		return rsi_handle_card_ready(common, msg);
 	case TX_STATUS_IND:
-		if (msg[15] == PROBEREQ_CONFIRM) {
+		switch (msg[RSI_TX_STATUS_TYPE]) {
+		case PROBEREQ_CONFIRM:
 			common->mgmt_q_block = false;
 			rsi_dbg(FSM_ZONE, "%s: Probe confirm received\n",
 				__func__);
+			break;
+		case EAPOL4_CONFIRM:
+			if (msg[RSI_TX_STATUS]) {
+				common->eapol4_confirm = true;
+				if (!rsi_send_block_unblock_frame(common,
+								  false))
+					common->hw_data_qs_blocked = false;
+			}
 		}
 		break;
 	case BEACON_EVENT_IND:

drivers/net/wireless/rsi/rsi_main.h

@@ -287,6 +287,7 @@ struct rsi_common {
 	struct timer_list roc_timer;
 	struct ieee80211_vif *roc_vif;
 
+	bool eapol4_confirm;
 	void *bt_adapter;
 };
 

drivers/net/wireless/rsi/rsi_mgmt.h

@@ -33,6 +33,7 @@
 #define WMM_SHORT_SLOT_TIME             9
 #define SIFS_DURATION                   16
 
+#define EAPOL4_PACKET_LEN		0x85
 #define KEY_TYPE_CLEAR                  0
 #define RSI_PAIRWISE_KEY                1
 #define RSI_GROUP_KEY                   2
@@ -62,9 +63,12 @@
 #define RX_DOT11_MGMT                   0x02
 #define TX_STATUS_IND                   0x04
 #define BEACON_EVENT_IND		0x08
+#define EAPOL4_CONFIRM                  1
 #define PROBEREQ_CONFIRM                2
 #define CARD_READY_IND                  0x00
 #define SLEEP_NOTIFY_IND                0x06
+#define RSI_TX_STATUS_TYPE		15
+#define RSI_TX_STATUS			12
 
 #define RSI_DELETE_PEER                 0x0
 #define RSI_ADD_PEER                    0x1
@@ -660,10 +664,14 @@ int rsi_set_channel(struct rsi_common *common,
 		    struct ieee80211_channel *channel);
 int rsi_send_vap_dynamic_update(struct rsi_common *common);
 int rsi_send_block_unblock_frame(struct rsi_common *common, bool event);
+int rsi_hal_send_sta_notify_frame(struct rsi_common *common, enum opmode opmode,
+				  u8 notify_event, const unsigned char *bssid,
+				  u8 qos_enable, u16 aid, u16 sta_id,
+				  struct ieee80211_vif *vif);
 void rsi_inform_bss_status(struct rsi_common *common, enum opmode opmode,
 			   u8 status, const u8 *addr, u8 qos_enable, u16 aid,
 			   struct ieee80211_sta *sta, u16 sta_id,
-			   struct ieee80211_vif *vif);
+			   u16 assoc_cap, struct ieee80211_vif *vif);
 void rsi_indicate_pkt_to_os(struct rsi_common *common, struct sk_buff *skb);
 int rsi_mac80211_attach(struct rsi_common *common);
 void rsi_indicate_tx_status(struct rsi_hw *common, struct sk_buff *skb,