1 files changed, 115 insertions, 44 deletions

diff --git a/drivers/net/wireless/mwifiex/uap_txrx.c b/drivers/net/wireless/mwifiex/uap_txrx.c
index a018e42d117..b0601b91cc4 100644
--- a/drivers/net/wireless/mwifiex/uap_txrx.c
+++ b/drivers/net/wireless/mwifiex/uap_txrx.c
@@ -24,6 +24,69 @@
 #include "11n_aggr.h"
 #include "11n_rxreorder.h"
 
+/* This function checks if particular RA list has packets more than low bridge
+ * packet threshold and then deletes packet from this RA list.
+ * Function deletes packets from such RA list and returns true. If no such list
+ * is found, false is returned.
+ */
+static bool
+mwifiex_uap_del_tx_pkts_in_ralist(struct mwifiex_private *priv,
+				  struct list_head *ra_list_head)
+{
+	struct mwifiex_ra_list_tbl *ra_list;
+	struct sk_buff *skb, *tmp;
+	bool pkt_deleted = false;
+	struct mwifiex_txinfo *tx_info;
+	struct mwifiex_adapter *adapter = priv->adapter;
+
+	list_for_each_entry(ra_list, ra_list_head, list) {
+		if (skb_queue_empty(&ra_list->skb_head))
+			continue;
+
+		skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) {
+			tx_info = MWIFIEX_SKB_TXCB(skb);
+			if (tx_info->flags & MWIFIEX_BUF_FLAG_BRIDGED_PKT) {
+				__skb_unlink(skb, &ra_list->skb_head);
+				mwifiex_write_data_complete(adapter, skb, 0,
+							    -1);
+				atomic_dec(&priv->wmm.tx_pkts_queued);
+				pkt_deleted = true;
+			}
+			if ((atomic_read(&adapter->pending_bridged_pkts) <=
+					     MWIFIEX_BRIDGED_PKTS_THR_LOW))
+				break;
+		}
+	}
+
+	return pkt_deleted;
+}
+
+/* This function deletes packets from particular RA List. RA list index
+ * from which packets are deleted is preserved so that packets from next RA
+ * list are deleted upon subsequent call thus maintaining fairness.
+ */
+static void mwifiex_uap_cleanup_tx_queues(struct mwifiex_private *priv)
+{
+	unsigned long flags;
+	struct list_head *ra_list;
+	int i;
+
+	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
+
+	for (i = 0; i < MAX_NUM_TID; i++, priv->del_list_idx++) {
+		if (priv->del_list_idx == MAX_NUM_TID)
+			priv->del_list_idx = 0;
+		ra_list = &priv->wmm.tid_tbl_ptr[priv->del_list_idx].ra_list;
+		if (mwifiex_uap_del_tx_pkts_in_ralist(priv, ra_list)) {
+			priv->del_list_idx++;
+			break;
+		}
+	}
+
+	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
+}
+
+
 static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv,
 					 struct sk_buff *skb)
 {
@@ -34,30 +97,57 @@ static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv,
 	struct mwifiex_txinfo *tx_info;
 	int hdr_chop;
 	struct timeval tv;
-	u8 rfc1042_eth_hdr[ETH_ALEN] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
+	struct ethhdr *p_ethhdr;
 
 	uap_rx_pd = (struct uap_rxpd *)(skb->data);
 	rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
 
 	if ((atomic_read(&adapter->pending_bridged_pkts) >=
-					     MWIFIEX_BRIDGED_PKTS_THRESHOLD)) {
+					     MWIFIEX_BRIDGED_PKTS_THR_HIGH)) {
 		dev_err(priv->adapter->dev,
 			"Tx: Bridge packet limit reached. Drop packet!\n");
 		kfree_skb(skb);
+		mwifiex_uap_cleanup_tx_queues(priv);
 		return;
 	}
 
-	if (!memcmp(&rx_pkt_hdr->rfc1042_hdr,
-		    rfc1042_eth_hdr, sizeof(rfc1042_eth_hdr)))
+	if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
+		     sizeof(bridge_tunnel_header))) ||
+	    (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
+		     sizeof(rfc1042_header)) &&
+	     ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP &&
+	     ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) {
+		/* Replace the 803 header and rfc1042 header (llc/snap) with
+		 * an Ethernet II header, keep the src/dst and snap_type
+		 * (ethertype).
+		 *
+		 * The firmware only passes up SNAP frames converting all RX
+		 * data from 802.11 to 802.2/LLC/SNAP frames.
+		 *
+		 * To create the Ethernet II, just move the src, dst address
+		 * right before the snap_type.
+		 */
+		p_ethhdr = (struct ethhdr *)
+			((u8 *)(&rx_pkt_hdr->eth803_hdr)
+			 + sizeof(rx_pkt_hdr->eth803_hdr)
+			 + sizeof(rx_pkt_hdr->rfc1042_hdr)
+			 - sizeof(rx_pkt_hdr->eth803_hdr.h_dest)
+			 - sizeof(rx_pkt_hdr->eth803_hdr.h_source)
+			 - sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type));
+		memcpy(p_ethhdr->h_source, rx_pkt_hdr->eth803_hdr.h_source,
+		       sizeof(p_ethhdr->h_source));
+		memcpy(p_ethhdr->h_dest, rx_pkt_hdr->eth803_hdr.h_dest,
+		       sizeof(p_ethhdr->h_dest));
 		/* Chop off the rxpd + the excess memory from
 		 * 802.2/llc/snap header that was removed.
 		 */
-		hdr_chop = (u8 *)eth_hdr - (u8 *)uap_rx_pd;
-	else
+		hdr_chop = (u8 *)p_ethhdr - (u8 *)uap_rx_pd;
+	} else {
 		/* Chop off the rxpd */
 		hdr_chop = (u8 *)&rx_pkt_hdr->eth803_hdr - (u8 *)uap_rx_pd;
+	}
 
-	/* Chop off the leading header bytes so the it points
+	/* Chop off the leading header bytes so that it points
 	 * to the start of either the reconstructed EthII frame
 	 * or the 802.2/llc/snap frame.
 	 */
@@ -85,20 +175,30 @@ static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv,
 	}
 
 	tx_info = MWIFIEX_SKB_TXCB(skb);
+	memset(tx_info, 0, sizeof(*tx_info));
 	tx_info->bss_num = priv->bss_num;
 	tx_info->bss_type = priv->bss_type;
 	tx_info->flags |= MWIFIEX_BUF_FLAG_BRIDGED_PKT;
 
+	if (is_unicast_ether_addr(rx_pkt_hdr->eth803_hdr.h_dest)) {
+		/* Update bridge packet statistics as the
+		 * packet is not going to kernel/upper layer.
+		 */
+		priv->stats.rx_bytes += skb->len;
+		priv->stats.rx_packets++;
+
+		/* Sending bridge packet to TX queue, so save the packet
+		 * length in TXCB to update statistics in TX complete.
+		 */
+		tx_info->pkt_len = skb->len;
+	}
+
 	do_gettimeofday(&tv);
 	skb->tstamp = timeval_to_ktime(tv);
 	mwifiex_wmm_add_buf_txqueue(priv, skb);
 	atomic_inc(&adapter->tx_pending);
 	atomic_inc(&adapter->pending_bridged_pkts);
 
-	if ((atomic_read(&adapter->tx_pending) >= MAX_TX_PENDING)) {
-		mwifiex_set_trans_start(priv->netdev);
-		mwifiex_stop_net_dev_queue(priv->netdev, priv->adapter);
-	}
 	return;
 }
 
@@ -181,36 +281,11 @@ int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv,
 			skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset),
 			le16_to_cpu(uap_rx_pd->rx_pkt_length));
 		priv->stats.rx_dropped++;
-
-		if (adapter->if_ops.data_complete)
-			adapter->if_ops.data_complete(adapter, skb);
-		else
-			dev_kfree_skb_any(skb);
-
+		dev_kfree_skb_any(skb);
 		return 0;
 	}
 
-	if (le16_to_cpu(uap_rx_pd->rx_pkt_type) == PKT_TYPE_AMSDU) {
-		struct sk_buff_head list;
-		struct sk_buff *rx_skb;
-
-		__skb_queue_head_init(&list);
-		skb_pull(skb, le16_to_cpu(uap_rx_pd->rx_pkt_offset));
-		skb_trim(skb, le16_to_cpu(uap_rx_pd->rx_pkt_length));
-
-		ieee80211_amsdu_to_8023s(skb, &list, priv->curr_addr,
-					 priv->wdev->iftype, 0, false);
-
-		while (!skb_queue_empty(&list)) {
-			rx_skb = __skb_dequeue(&list);
-			ret = mwifiex_recv_packet(priv, rx_skb);
-			if (ret)
-				dev_err(adapter->dev,
-					"AP:Rx A-MSDU failed");
-		}
-
-		return 0;
-	} else if (rx_pkt_type == PKT_TYPE_MGMT) {
+	if (rx_pkt_type == PKT_TYPE_MGMT) {
 		ret = mwifiex_process_mgmt_packet(priv, skb);
 		if (ret)
 			dev_err(adapter->dev, "Rx of mgmt packet failed");
@@ -240,12 +315,8 @@ int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv,
 					 uap_rx_pd->priority, ta, pkt_type,
 					 skb);
 
-	if (ret || (rx_pkt_type == PKT_TYPE_BAR)) {
-		if (adapter->if_ops.data_complete)
-			adapter->if_ops.data_complete(adapter, skb);
-		else
-			dev_kfree_skb_any(skb);
-	}
+	if (ret || (rx_pkt_type == PKT_TYPE_BAR))
+		dev_kfree_skb_any(skb);
 
 	if (ret)
 		priv->stats.rx_dropped++;