mbuf: update Tx VLAN and QinQ flags documentation

Currently PKT_TX_VLAN and PKT_TX_QINQ mbuf flags are documented as
they are to say packet contains VLAN or QINQ information.

Updating the definition as they are requests from application to
driver to insert VLAN or double VLAN tags into packet.

Fixes: dc6c911c9993 ("mbuf: use reserved space for double vlan")
Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index f7886dc..a6c4a5e 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -280,9 +280,11 @@ extern "C" {
 #define PKT_TX_TUNNEL_MASK    (0xFULL << 45)
 
 /**
- * Second VLAN insertion (QinQ) flag.
+ * Double VLAN insertion (QinQ) request to driver, driver may offload the
+ * insertion based on device capability.
+ * mbuf 'vlan_tci' & 'vlan_tci_outer' must be valid when this flag is set.
  */
-#define PKT_TX_QINQ        (1ULL << 49)   /**< TX packet with double VLAN inserted. */
+#define PKT_TX_QINQ        (1ULL << 49)
 /* this old name is deprecated */
 #define PKT_TX_QINQ_PKT    PKT_TX_QINQ
 
@@ -338,7 +340,9 @@ extern "C" {
 #define PKT_TX_IPV6          (1ULL << 56)
 
 /**
- * TX packet is a 802.1q VLAN packet.
+ * VLAN tag insertion request to driver, driver may offload the insertion
+ * based on the device capability.
+ * mbuf 'vlan_tci' field must be valid when this flag is set.
  */
 #define PKT_TX_VLAN          (1ULL << 57)
 /* this old name is deprecated */