qcacmn: Enable TSO Stats for Lithium based products

Add support to account for TSO jumbo packets on the
Tx path and print the statistics using dumpStats 3.

Change-Id: I6cc446df5c84e3ac436d922935fcd559e0704ec5
CRs-Fixed: 2356244

qdf/linux/src/i_qdf_nbuf.h

@@ -1453,9 +1453,23 @@ void __qdf_nbuf_unmap_tso_segment(qdf_device_t osdev,
 			  bool is_last_seg);
 
 #ifdef FEATURE_TSO
+/**
+ * __qdf_nbuf_get_tcp_payload_len() - function to return the tcp
+ *                                    payload len
+ * @skb: buffer
+ *
+ * Return: size
+ */
+size_t __qdf_nbuf_get_tcp_payload_len(struct sk_buff *skb);
 uint32_t __qdf_nbuf_get_tso_num_seg(struct sk_buff *skb);
 
 #else
+static inline
+size_t __qdf_nbuf_get_tcp_payload_len(struct sk_buff *skb)
+{
+	return 0;
+}
+
 static inline uint32_t __qdf_nbuf_get_tso_num_seg(struct sk_buff *skb)
 {
 	return 0;

qdf/linux/src/qdf_nbuf.c

@@ -3138,6 +3138,19 @@ last_seg_free_first_frag:
 }
 qdf_export_symbol(__qdf_nbuf_unmap_tso_segment);
 
+size_t __qdf_nbuf_get_tcp_payload_len(struct sk_buff *skb)
+{
+	size_t packet_len;
+
+	packet_len = skb->len -
+		((skb_transport_header(skb) - skb_mac_header(skb)) +
+		 tcp_hdrlen(skb));
+
+	return packet_len;
+}
+
+qdf_export_symbol(__qdf_nbuf_get_tcp_payload_len);
+
 /**
  * __qdf_nbuf_get_tso_num_seg() - function to divide a TSO nbuf
  * into segments