[dpdk-stable] patch 'net/octeontx2: fix jumbo frame flag condition for MTU' has been queued to stable release 20.11.1

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/07/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/297cbb21e3659824caa835830d8e0b7a0464529b

Thanks.

Luca Boccassi

---
>From 297cbb21e3659824caa835830d8e0b7a0464529b Mon Sep 17 00:00:00 2001
From: Steve Yang <stevex.yang at intel.com>
Date: Mon, 18 Jan 2021 07:04:18 +0000
Subject: [PATCH] net/octeontx2: fix jumbo frame flag condition for MTU

[ upstream commit 3a921cd69bdbf39ba2a17af0c01f0000c6efb893 ]

The jumbo frame uses the 'RTE_ETHER_MAX_LEN' as boundary condition,
but the Ether overhead is larger than 18 when it supports dual VLAN tags.
That will cause the jumbo flag rx offload is wrong when MTU size is
'RTE_ETHER_MTU'.

This fix will change the boundary condition with 'RTE_ETHER_MTU' and
overhead, that perhaps impacts the cases of the jumbo frame related.

Fixes: 0e2efd02db58 ("net/octeontx2: add MTU set operation")

Signed-off-by: Steve Yang <stevex.yang at intel.com>
Acked-by: Nithin Dabilpuram <ndabilpuram at marvell.com>
---
 drivers/net/octeontx2/otx2_ethdev.h     | 2 ++
 drivers/net/octeontx2/otx2_ethdev_ops.c | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/octeontx2/otx2_ethdev.h b/drivers/net/octeontx2/otx2_ethdev.h
index 3b9871f4dc..99f0469d89 100644
--- a/drivers/net/octeontx2/otx2_ethdev.h
+++ b/drivers/net/octeontx2/otx2_ethdev.h
@@ -51,6 +51,8 @@
 /* ETH_HLEN+ETH_FCS+2*VLAN_HLEN */
 #define NIX_L2_OVERHEAD \
 	(RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + 8)
+#define NIX_L2_MAX_LEN \
+	(RTE_ETHER_MTU + NIX_L2_OVERHEAD)
 
 /* HW config of frame size doesn't include FCS */
 #define NIX_MAX_HW_FRS			9212
diff --git a/drivers/net/octeontx2/otx2_ethdev_ops.c b/drivers/net/octeontx2/otx2_ethdev_ops.c
index b36d37b9f7..963cc285ed 100644
--- a/drivers/net/octeontx2/otx2_ethdev_ops.c
+++ b/drivers/net/octeontx2/otx2_ethdev_ops.c
@@ -58,7 +58,7 @@ otx2_nix_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
 	if (rc)
 		return rc;
 
-	if (frame_size > RTE_ETHER_MAX_LEN)
+	if (frame_size > NIX_L2_MAX_LEN)
 		dev->rx_offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
 	else
 		dev->rx_offloads &= ~DEV_RX_OFFLOAD_JUMBO_FRAME;
-- 
2.29.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-05 11:18:36.209650038 +0000
+++ 0154-net-octeontx2-fix-jumbo-frame-flag-condition-for-MTU.patch	2021-02-05 11:18:29.090696519 +0000
@@ -1 +1 @@
-From 3a921cd69bdbf39ba2a17af0c01f0000c6efb893 Mon Sep 17 00:00:00 2001
+From 297cbb21e3659824caa835830d8e0b7a0464529b Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 3a921cd69bdbf39ba2a17af0c01f0000c6efb893 ]
+
@@ -15 +16,0 @@
-Cc: stable at dpdk.org