patch 'net/cnxk: fix MTU limit' has been queued to stable release 22.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 22.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/16/24. 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/a2ec8fb5fa3affbd151031578c5a51a3c6bb7ed9

Thanks.

Luca Boccassi

---
>From a2ec8fb5fa3affbd151031578c5a51a3c6bb7ed9 Mon Sep 17 00:00:00 2001
From: Sunil Kumar Kori <skori at marvell.com>
Date: Mon, 26 Feb 2024 19:05:30 +0530
Subject: [PATCH] net/cnxk: fix MTU limit

[ upstream commit 402de2fd8729b61a3ace67c597e99893acb426d4 ]

Device can support maximum frame size up to 9212 bytes. While configuring
MTU, overhead is considered as ethernet header size, CRC and
2 * (VLAN tags) which translates to 26 bytes.

Exposed overhead to the user via rte_eth_dev_info() is 18 bytes which were
leading to set wrong Rx frame size.

Fixes: 8589ec212e80 ("net/cnxk: support MTU set")

Signed-off-by: Sunil Kumar Kori <skori at marvell.com>
---
 drivers/net/cnxk/cnxk_ethdev_ops.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/cnxk/cnxk_ethdev_ops.c b/drivers/net/cnxk/cnxk_ethdev_ops.c
index c13ef26c5d..be29b385a4 100644
--- a/drivers/net/cnxk/cnxk_ethdev_ops.c
+++ b/drivers/net/cnxk/cnxk_ethdev_ops.c
@@ -20,8 +20,7 @@ cnxk_nix_info_get(struct rte_eth_dev *eth_dev, struct rte_eth_dev_info *devinfo)
 	devinfo->max_tx_queues = RTE_MAX_QUEUES_PER_PORT;
 	devinfo->max_mac_addrs = dev->max_mac_entries;
 	devinfo->max_vfs = pci_dev->max_vfs;
-	devinfo->max_mtu = devinfo->max_rx_pktlen -
-				(RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN);
+	devinfo->max_mtu = devinfo->max_rx_pktlen - CNXK_NIX_L2_OVERHEAD;
 	devinfo->min_mtu = devinfo->min_rx_bufsize - CNXK_NIX_L2_OVERHEAD;
 
 	devinfo->rx_offload_capa = dev->rx_offload_capa;
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-03-14 00:09:22.102996312 +0000
+++ 0030-net-cnxk-fix-MTU-limit.patch	2024-03-14 00:09:20.613615221 +0000
@@ -1 +1 @@
-From 402de2fd8729b61a3ace67c597e99893acb426d4 Mon Sep 17 00:00:00 2001
+From a2ec8fb5fa3affbd151031578c5a51a3c6bb7ed9 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 402de2fd8729b61a3ace67c597e99893acb426d4 ]
+
@@ -14 +15,0 @@
-Cc: stable at dpdk.org
@@ -22 +23 @@
-index 4962f3bced..56049c5dd2 100644
+index c13ef26c5d..be29b385a4 100644