[dpdk-stable] patch 'net/liquidio: fix jumbo frame flag condition for MTU set' 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/323ebde1407fb49f024176e845ff957c1c27dae2

Thanks.

Luca Boccassi

---
>From 323ebde1407fb49f024176e845ff957c1c27dae2 Mon Sep 17 00:00:00 2001
From: Steve Yang <stevex.yang at intel.com>
Date: Mon, 18 Jan 2021 07:04:28 +0000
Subject: [PATCH] net/liquidio: fix jumbo frame flag condition for MTU set

[ upstream commit 92c87229a9b096a53a5a9763bfee0198d20a91ea ]

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

This fix will normalize the boundary condition with 'RTE_ETHER_MTU'
and overhead even though current overhead is 18.

Fixes: 9f1c00266d82 ("net/liquidio: add API to set MTU")

Signed-off-by: Steve Yang <stevex.yang at intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 drivers/net/liquidio/lio_ethdev.c | 2 +-
 drivers/net/liquidio/lio_ethdev.h | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/liquidio/lio_ethdev.c b/drivers/net/liquidio/lio_ethdev.c
index d4dd3768cd..eb0fdab45a 100644
--- a/drivers/net/liquidio/lio_ethdev.c
+++ b/drivers/net/liquidio/lio_ethdev.c
@@ -481,7 +481,7 @@ lio_dev_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
 		return -1;
 	}
 
-	if (frame_len > RTE_ETHER_MAX_LEN)
+	if (frame_len > LIO_ETH_MAX_LEN)
 		eth_dev->data->dev_conf.rxmode.offloads |=
 			DEV_RX_OFFLOAD_JUMBO_FRAME;
 	else
diff --git a/drivers/net/liquidio/lio_ethdev.h b/drivers/net/liquidio/lio_ethdev.h
index 74cd2fb6c6..d33be1c44d 100644
--- a/drivers/net/liquidio/lio_ethdev.h
+++ b/drivers/net/liquidio/lio_ethdev.h
@@ -13,6 +13,9 @@
 #define LIO_LSC_TIMEOUT		100000 /* 100000us (100ms) */
 #define LIO_MAX_CMD_TIMEOUT     10000 /* 10000ms (10s) */
 
+/* The max frame size with default MTU */
+#define LIO_ETH_MAX_LEN (RTE_ETHER_MTU + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN)
+
 #define LIO_DEV(_eth_dev)		((_eth_dev)->data->dev_private)
 
 /* LIO Response condition variable */
-- 
2.29.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-05 11:18:36.625406128 +0000
+++ 0164-net-liquidio-fix-jumbo-frame-flag-condition-for-MTU-.patch	2021-02-05 11:18:29.114696976 +0000
@@ -1 +1 @@
-From 92c87229a9b096a53a5a9763bfee0198d20a91ea Mon Sep 17 00:00:00 2001
+From 323ebde1407fb49f024176e845ff957c1c27dae2 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 92c87229a9b096a53a5a9763bfee0198d20a91ea ]
+
@@ -15 +16,0 @@
-Cc: stable at dpdk.org