patch 'common/cnxk: fix Tx MTU configuration' has been queued to stable release 23.11.1

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 23.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 04/15/24. 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://git.dpdk.org/dpdk-stable/log/?h=23.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/commit/?h=23.11-staging&id=3e73021b35d56bd1f17648047fa2abd439d653bf

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 3e73021b35d56bd1f17648047fa2abd439d653bf Mon Sep 17 00:00:00 2001
From: Nithin Dabilpuram <ndabilpuram at marvell.com>
Date: Mon, 26 Feb 2024 19:05:29 +0530
Subject: [PATCH] common/cnxk: fix Tx MTU configuration
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit cc9f534f60815d858b946062cb1d9701c91b9b58 ]

Skip setting Tx MTU separately as now the Tx credit configuration
is based on max MTU possible for that link.

Also, initialize  MTU with max value for that port.

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

Signed-off-by: Nithin Dabilpuram <ndabilpuram at marvell.com>
---
 drivers/common/cnxk/roc_nix.c      |  2 +-
 drivers/common/cnxk/roc_nix.h      |  2 --
 drivers/net/cnxk/cnxk_ethdev_ops.c | 12 +-----------
 3 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/common/cnxk/roc_nix.c b/drivers/common/cnxk/roc_nix.c
index f64933a1d9..afbc3eb901 100644
--- a/drivers/common/cnxk/roc_nix.c
+++ b/drivers/common/cnxk/roc_nix.c
@@ -482,7 +482,7 @@ skip_dev_init:
 	sdp_lbk_id_update(pci_dev, nix);
 	nix->pci_dev = pci_dev;
 	nix->reta_sz = reta_sz;
-	nix->mtu = ROC_NIX_DEFAULT_HW_FRS;
+	nix->mtu = roc_nix_max_pkt_len(roc_nix);
 	nix->dmac_flt_idx = -1;
 
 	/* Register error and ras interrupts */
diff --git a/drivers/common/cnxk/roc_nix.h b/drivers/common/cnxk/roc_nix.h
index acdd1c4cbc..250d710c07 100644
--- a/drivers/common/cnxk/roc_nix.h
+++ b/drivers/common/cnxk/roc_nix.h
@@ -267,8 +267,6 @@ struct roc_nix_eeprom_info {
 #define ROC_NIX_RSS_KEY_LEN	     48 /* 352 Bits */
 #define ROC_NIX_RSS_MCAM_IDX_DEFAULT (-1)
 
-#define ROC_NIX_DEFAULT_HW_FRS 1514
-
 #define ROC_NIX_VWQE_MAX_SIZE_LOG2 11
 #define ROC_NIX_VWQE_MIN_SIZE_LOG2 2
 
diff --git a/drivers/net/cnxk/cnxk_ethdev_ops.c b/drivers/net/cnxk/cnxk_ethdev_ops.c
index ec72c32826..2fdad8b4b6 100644
--- a/drivers/net/cnxk/cnxk_ethdev_ops.c
+++ b/drivers/net/cnxk/cnxk_ethdev_ops.c
@@ -610,19 +610,9 @@ skip_buffsz_check:
 
 	frame_size -= RTE_ETHER_CRC_LEN;
 
-	/* Update mtu on Tx */
-	rc = roc_nix_mac_mtu_set(nix, frame_size);
-	if (rc) {
-		plt_err("Failed to set MTU, rc=%d", rc);
-		goto exit;
-	}
-
-	/* Sync same frame size on Rx */
+	/* Set frame size on Rx */
 	rc = roc_nix_mac_max_rx_len_set(nix, frame_size);
 	if (rc) {
-		/* Rollback to older mtu */
-		roc_nix_mac_mtu_set(nix,
-				    old_frame_size - RTE_ETHER_CRC_LEN);
 		plt_err("Failed to max Rx frame length, rc=%d", rc);
 		goto exit;
 	}
-- 
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-04-13 20:43:06.120148366 +0800
+++ 0033-common-cnxk-fix-Tx-MTU-configuration.patch	2024-04-13 20:43:04.947753997 +0800
@@ -1 +1 @@
-From cc9f534f60815d858b946062cb1d9701c91b9b58 Mon Sep 17 00:00:00 2001
+From 3e73021b35d56bd1f17648047fa2abd439d653bf Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit cc9f534f60815d858b946062cb1d9701c91b9b58 ]
@@ -12 +14,0 @@
-Cc: stable at dpdk.org
@@ -22 +24 @@
-index 97c0ae3e25..90ccb260fb 100644
+index f64933a1d9..afbc3eb901 100644
@@ -25 +27 @@
-@@ -484,7 +484,7 @@ skip_dev_init:
+@@ -482,7 +482,7 @@ skip_dev_init:
@@ -35 +37 @@
-index 2a198de458..4db71544f0 100644
+index acdd1c4cbc..250d710c07 100644
@@ -48 +50 @@
-index e816884d47..4962f3bced 100644
+index ec72c32826..2fdad8b4b6 100644