[dpdk-stable] patch 'net/cxgbe: fix jumbo frame flag condition' 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/9326ad37af4c1c8876e71b09234e57967666d581

Thanks.

Luca Boccassi

---
>From 9326ad37af4c1c8876e71b09234e57967666d581 Mon Sep 17 00:00:00 2001
From: Steve Yang <stevex.yang at intel.com>
Date: Mon, 18 Jan 2021 07:04:23 +0000
Subject: [PATCH] net/cxgbe: fix jumbo frame flag condition

[ upstream commit 5dfbad550cafbc09aaaff07072cb2eb5f2a1fdaa ]

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: 4b2eff452d2e ("cxgbe: enable jumbo frames")
Fixes: 0ec33be4c857 ("cxgbe: allow to change mtu")

Signed-off-by: Steve Yang <stevex.yang at intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 drivers/net/cxgbe/cxgbe.h        | 4 ++++
 drivers/net/cxgbe/cxgbe_ethdev.c | 4 ++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/cxgbe/cxgbe.h b/drivers/net/cxgbe/cxgbe.h
index ef62af1c3f..7c89a028bf 100644
--- a/drivers/net/cxgbe/cxgbe.h
+++ b/drivers/net/cxgbe/cxgbe.h
@@ -19,6 +19,10 @@
 #define CXGBE_MAX_RX_PKTLEN (9000 + RTE_ETHER_HDR_LEN + \
 				RTE_ETHER_CRC_LEN) /* max pkt */
 
+/* The max frame size with default MTU */
+#define CXGBE_ETH_MAX_LEN (RTE_ETHER_MTU + \
+		RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN)
+
 /* Max poll time is 100 * 100msec = 10 sec */
 #define CXGBE_LINK_STATUS_POLL_MS 100 /* 100ms */
 #define CXGBE_LINK_STATUS_POLL_CNT 100 /* Max number of times to poll */
diff --git a/drivers/net/cxgbe/cxgbe_ethdev.c b/drivers/net/cxgbe/cxgbe_ethdev.c
index 98d0362fa3..480d6f58a8 100644
--- a/drivers/net/cxgbe/cxgbe_ethdev.c
+++ b/drivers/net/cxgbe/cxgbe_ethdev.c
@@ -300,7 +300,7 @@ int cxgbe_dev_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
 		return -EINVAL;
 
 	/* set to jumbo mode if needed */
-	if (new_mtu > RTE_ETHER_MAX_LEN)
+	if (new_mtu > CXGBE_ETH_MAX_LEN)
 		eth_dev->data->dev_conf.rxmode.offloads |=
 			DEV_RX_OFFLOAD_JUMBO_FRAME;
 	else
@@ -669,7 +669,7 @@ int cxgbe_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
 		rxq->fl.size = temp_nb_desc;
 
 	/* Set to jumbo mode if necessary */
-	if (pkt_len > RTE_ETHER_MAX_LEN)
+	if (pkt_len > CXGBE_ETH_MAX_LEN)
 		eth_dev->data->dev_conf.rxmode.offloads |=
 			DEV_RX_OFFLOAD_JUMBO_FRAME;
 	else
-- 
2.29.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-05 11:18:36.420344213 +0000
+++ 0159-net-cxgbe-fix-jumbo-frame-flag-condition.patch	2021-02-05 11:18:29.106696824 +0000
@@ -1 +1 @@
-From 5dfbad550cafbc09aaaff07072cb2eb5f2a1fdaa Mon Sep 17 00:00:00 2001
+From 9326ad37af4c1c8876e71b09234e57967666d581 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 5dfbad550cafbc09aaaff07072cb2eb5f2a1fdaa ]
+
@@ -16 +17,0 @@
-Cc: stable at dpdk.org
@@ -41 +42 @@
-index eb4258fe17..cfa385bab7 100644
+index 98d0362fa3..480d6f58a8 100644
@@ -44 +45 @@
-@@ -301,7 +301,7 @@ int cxgbe_dev_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
+@@ -300,7 +300,7 @@ int cxgbe_dev_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu)
@@ -53 +54 @@
-@@ -670,7 +670,7 @@ int cxgbe_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
+@@ -669,7 +669,7 @@ int cxgbe_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,