qcacmn: Add utility functions to set/get flow tag from skb cb

Tags are programmed using wlanconfig commands. Rx IPv4/v6
TCP/UDP packets matching a 5-tuple are tagged using HawkeyeV2 hardware.
Tags are populated in the skb->cb in the REO/exception/monitor data
path and sent to upper stack

CRs-Fixed: 2475913
Change-Id: I534a633b99a8b1c4c9aab71fbf5857710d7977a1

qdf/inc/i_qdf_nbuf_api_m.h

@@ -58,19 +58,41 @@ static inline void qdf_nbuf_ipa_priv_set(qdf_nbuf_t buf, uint32_t priv)
 /**
  * qdf_nbuf_set_rx_protocol_tag()
  * @buf: Network buffer
- * @val: Value to be set
- * Return: void
+ * @val: Value to be set in the nbuf
+ * Return: None
  */
-static inline void qdf_nbuf_set_rx_protocol_tag(qdf_nbuf_t buf, uint32_t val)
+static inline void qdf_nbuf_set_rx_protocol_tag(qdf_nbuf_t buf, uint16_t val)
 {
 }
 
 /**
  * qdf_nbuf_get_rx_protocol_tag()
  * @buf: Network buffer
- * Return: void
+ * Return: Value of rx protocol tag, here 0
  */
-static inline int qdf_nbuf_get_rx_protocol_tag(qdf_nbuf_t buf)
+static inline uint16_t qdf_nbuf_get_rx_protocol_tag(qdf_nbuf_t buf)
+{
+	return 0;
+}
+
+/**
+ * qdf_nbuf_set_rx_flow_tag() - set given value in flow tag field
+ * of buf(skb->cb)
+ * @buf: Network buffer
+ * @val: Rx Flow Tag to be set in the nbuf
+ * Return: None
+ */
+static inline void qdf_nbuf_set_rx_flow_tag(qdf_nbuf_t buf, uint16_t val)
+{
+}
+
+/**
+ * qdf_nbuf_get_rx_flow_tag() - Get the value of flow_tag
+ * field of buf(skb->cb)
+ * @buf: Network buffer
+ * Return: Value of rx flow tag, here 0
+ */
+static inline uint16_t qdf_nbuf_get_rx_flow_tag(qdf_nbuf_t buf)
 {
 	return 0;
 }

qdf/inc/i_qdf_nbuf_api_w.h

@@ -68,10 +68,10 @@ qdf_nbuf_set_ext_cb(qdf_nbuf_t buf, void *ref)
  * qdf_nbuf_set_rx_protocol_tag() - set given value in protocol_tag
  * field of buf(skb->cb)
  * @buf: Network buffer
- * @val: Value to be set
- * Return: void
+ * @val: Value to be set in the nbuf
+ * Return: None
  */
-static inline void qdf_nbuf_set_rx_protocol_tag(qdf_nbuf_t buf, uint32_t val)
+static inline void qdf_nbuf_set_rx_protocol_tag(qdf_nbuf_t buf, uint16_t val)
 {
 	__qdf_nbuf_set_rx_protocol_tag(buf, val);
 }
@@ -80,10 +80,34 @@ static inline void qdf_nbuf_set_rx_protocol_tag(qdf_nbuf_t buf, uint32_t val)
  * qdf_nbuf_get_rx_protocol_tag() - Get the value of protocol_tag
  * field of buf(skb->cb)
  * @buf: Network buffer
- * Return: void
+ * Return: Value of Rx protocol tag in the nbuf
  */
-static inline int qdf_nbuf_get_rx_protocol_tag(qdf_nbuf_t buf)
+static inline uint16_t qdf_nbuf_get_rx_protocol_tag(qdf_nbuf_t buf)
 {
 	return __qdf_nbuf_get_rx_protocol_tag(buf);
 }
+
+/**
+ * qdf_nbuf_set_rx_flow_tag() - set given value in flow tag field
+ * of buf(skb->cb)
+ * @buf: Network buffer
+ * @val: Value of Rx flow tag to be set in the nbuf
+ * Return: None
+ */
+static inline void qdf_nbuf_set_rx_flow_tag(qdf_nbuf_t buf, uint16_t val)
+{
+	__qdf_nbuf_set_rx_flow_tag(buf, val);
+}
+
+/**
+ * qdf_nbuf_get_rx_flow_tag() - Get the value of flow_tag
+ * field of buf(skb->cb)
+ * @buf: Network buffer
+ * Return: Value of the Rx flow tag in the nbuf
+ */
+static inline uint16_t qdf_nbuf_get_rx_flow_tag(qdf_nbuf_t buf)
+{
+	return __qdf_nbuf_get_rx_flow_tag(buf);
+}
+
 #endif /* _QDF_NBUF_W_H */

qdf/linux/src/i_qdf_nbuf.h

@@ -101,10 +101,8 @@ typedef union {
  * @rx.dev.priv_cb_w.fctx: ctx to handle special pkts defined by ftype
  * @rx.dev.priv_cb_w.msdu_len: length of RX packet
  * @rx.dev.priv_cb_w.peer_id: peer_id for RX packet
- * @rx.dev.priv_cb_w.protocol_tag:	protocol tag set by application for
- *				received packet type
- * @rx.dev.priv_cb_w.reserved1: reserved for flow tag set by application
- *				for 5 tuples received
+ * @rx.dev.priv_cb_w.protocol_tag: protocol tag set by app for rcvd packet type
+ * @rx.dev.priv_cb_w.flow_tag: flow tag set by application for 5 tuples rcvd
  *
  * @rx.dev.priv_cb_m.tcp_seq_num: TCP sequence number
  * @rx.dev.priv_cb_m.tcp_ack_num: TCP ACK number
@@ -212,7 +210,7 @@ struct qdf_nbuf_cb {
 					uint16_t msdu_len;
 					uint16_t peer_id;
 					uint16_t protocol_tag;
-					uint16_t reserved1;
+					uint16_t flow_tag;
 				} priv_cb_w;
 				struct {
 					/* ipa_owned bit is common between rx

qdf/linux/src/i_qdf_nbuf_w.h

@@ -82,6 +82,16 @@
 #define __qdf_nbuf_get_rx_protocol_tag(skb) \
 		(QDF_NBUF_CB_RX_PROTOCOL_TAG((skb)))
 
+#define QDF_NBUF_CB_RX_FLOW_TAG(skb) \
+		(((struct qdf_nbuf_cb *) \
+		((skb)->cb))->u.rx.dev.priv_cb_w.flow_tag)
+
+#define __qdf_nbuf_set_rx_flow_tag(skb, val) \
+		((QDF_NBUF_CB_RX_FLOW_TAG((skb))) = val)
+
+#define __qdf_nbuf_get_rx_flow_tag(skb) \
+		(QDF_NBUF_CB_RX_FLOW_TAG((skb)))
+
 /**
  * qdf_nbuf_cb_update_peer_local_id() - update peer local id in skb cb
  * @skb: skb pointer whose cb is updated with peer local id information