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From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
To: John McNamara <john.mcnamara@intel.com>,
	Marko Kovacevic <marko.kovacevic@intel.com>
Cc: dev@dpdk.org, thomas@monjalon.net, ferruh.yigit@intel.com,
	arybchenko@solarflare.com, olivier.matz@6wind.com,
	Jerin Jacob <jerin.jacob@caviumnetworks.com>,
	stable@dpdk.org
Subject: [dpdk-dev]  [PATCH 1/2] doc: clarify L3 Tx checksum prerequisite
Date: Fri,  5 Oct 2018 10:16:04 +0530	[thread overview]
Message-ID: <20181005044606.27026-1-jerin.jacob@caviumnetworks.com> (raw)

Based on PKT_TX_IP_CKSUM definition the user needs
to fill l2_len and l3_len mbuf fields before issuing
HW Tx checksum request.

Fixes: dad1ec72a377 ("doc: document NIC features")
Cc: stable@dpdk.org

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
---

See PKT_TX_IP_CKSUM at
https://git.dpdk.org/dpdk/tree/lib/librte_mbuf/rte_mbuf.h#n283

---
 doc/guides/nics/features.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index b085bda86..e726a6bb8 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -562,6 +562,7 @@ Supports L3 checksum offload.
 * **[uses]     rte_eth_txconf,rte_eth_txmode**: ``offloads:DEV_TX_OFFLOAD_IPV4_CKSUM``.
 * **[uses]     mbuf**: ``mbuf.ol_flags:PKT_TX_IP_CKSUM``,
   ``mbuf.ol_flags:PKT_TX_IPV4`` | ``PKT_TX_IPV6``.
+* **[uses]     mbuf**: ``mbuf.l2_len``, ``mbuf.l3_len``.
 * **[provides] mbuf**: ``mbuf.ol_flags:PKT_RX_IP_CKSUM_UNKNOWN`` |
   ``PKT_RX_IP_CKSUM_BAD`` | ``PKT_RX_IP_CKSUM_GOOD`` |
   ``PKT_RX_IP_CKSUM_NONE``.
-- 
2.19.0

             reply	other threads:[~2018-10-05  4:46 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-05  4:46 Jerin Jacob [this message]
2018-10-05  4:46 ` [dpdk-dev] [PATCH 2/2] doc: clarify L4 " Jerin Jacob
2018-10-05  6:45   ` Andrew Rybchenko
2018-10-05  6:44 ` [dpdk-dev] [PATCH 1/2] doc: clarify L3 " Andrew Rybchenko
2018-10-05  7:06   ` Jerin Jacob
2018-10-09 10:19   ` Ferruh Yigit
2018-10-05 19:56 ` Ferruh Yigit
2018-10-06  8:05   ` Jerin Jacob

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