[dpdk-dev] [PATCH v2 2/2] mbuf: improve API doc for tunnel Tx offloads
Thomas Monjalon
thomas at monjalon.net
Mon Apr 23 12:48:36 CEST 2018
Add few details to remind TSO flag, checksum flags and header lengths.
The doxygen syntax for MPLS-in-UDP is fixed.
Fixes: d95188551fa1 ("mbuf: introduce new Tx offload flag for MPLS-in-UDP")
Cc: stable at dpdk.org
Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
---
lib/librte_mbuf/rte_mbuf.h | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 029822226..63a03c2f7 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -201,14 +201,17 @@ extern "C" {
/**
* Bits 45:48 used for the tunnel type.
- * When doing Tx offload like TSO or checksum, the HW needs to configure the
- * tunnel type into the HW descriptors.
+ * The tunnel type must be specified for TSO or checksum on the inner part
+ * of tunnel packets.
+ * These flags can be used with PKT_TX_TCP_SEG for TSO, or PKT_TX_xxx_CKSUM.
+ * The mbuf fields for inner and outer header lengths are required:
+ * outer_l2_len, outer_l3_len, l2_len, l3_len, l4_len and tso_segsz for TSO.
*/
#define PKT_TX_TUNNEL_VXLAN (0x1ULL << 45)
#define PKT_TX_TUNNEL_GRE (0x2ULL << 45)
#define PKT_TX_TUNNEL_IPIP (0x3ULL << 45)
#define PKT_TX_TUNNEL_GENEVE (0x4ULL << 45)
-/**< TX packet with MPLS-in-UDP RFC 7510 header. */
+/** TX packet with MPLS-in-UDP RFC 7510 header. */
#define PKT_TX_TUNNEL_MPLSINUDP (0x5ULL << 45)
/* add new TX TUNNEL type here */
#define PKT_TX_TUNNEL_MASK (0xFULL << 45)
--
2.16.2
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