patch 'net/dpaa: forbid MTU configuration for shared interface' has been queued to stable release 23.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 23.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 08/14/24. 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=77231b25980ef996ed140b6651826fbeff283104

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 77231b25980ef996ed140b6651826fbeff283104 Mon Sep 17 00:00:00 2001
From: Rohit Raj <rohit.raj at nxp.com>
Date: Wed, 10 Jul 2024 14:25:33 +0530
Subject: [PATCH] net/dpaa: forbid MTU configuration for shared interface
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit ee0fa7552a0af02e2151414aeec2ce4e12a2e806 ]

Since DPDK was able to configure mtu in VSP/Shared interface mode,
it was causing misconfiguration of the hw which further caused crashes.

This patch allows only kernel to config MTU in such cases.

Fixes: e4abd4ff183c ("net/dpaa: support virtual storage profile")

Signed-off-by: Rohit Raj <rohit.raj at nxp.com>
Signed-off-by: Vanshika Shukla <vanshika.shukla at nxp.com>
---
 drivers/net/dpaa/dpaa_ethdev.c | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dpaa/dpaa_ethdev.c b/drivers/net/dpaa/dpaa_ethdev.c
index 779bdc5860..bcb28f33ee 100644
--- a/drivers/net/dpaa/dpaa_ethdev.c
+++ b/drivers/net/dpaa/dpaa_ethdev.c
@@ -14,6 +14,7 @@
 #include <pthread.h>
 #include <sys/types.h>
 #include <sys/syscall.h>
+#include <sys/ioctl.h>
 
 #include <rte_string_fns.h>
 #include <rte_byteorder.h>
@@ -165,9 +166,15 @@ dpaa_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	uint32_t frame_size = mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN
 				+ VLAN_TAG_SIZE;
 	uint32_t buffsz = dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM;
+	struct fman_if *fif = dev->process_private;
 
 	PMD_INIT_FUNC_TRACE();
 
+	if (fif->is_shared_mac) {
+		DPAA_PMD_ERR("Cannot configure mtu from DPDK in VSP mode.");
+		return -ENOTSUP;
+	}
+
 	/*
 	 * Refuse mtu that requires the support of scattered packets
 	 * when this feature has not been enabled before.
@@ -206,7 +213,8 @@ dpaa_eth_dev_configure(struct rte_eth_dev *dev)
 	struct rte_intr_handle *intr_handle;
 	uint32_t max_rx_pktlen;
 	int speed, duplex;
-	int ret, rx_status;
+	int ret, rx_status, socket_fd;
+	struct ifreq ifr;
 
 	PMD_INIT_FUNC_TRACE();
 
@@ -222,6 +230,26 @@ dpaa_eth_dev_configure(struct rte_eth_dev *dev)
 				     dpaa_intf->name);
 			return -EHOSTDOWN;
 		}
+
+		socket_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
+		if (socket_fd == -1) {
+			DPAA_PMD_ERR("Cannot open IF socket");
+			return -errno;
+		}
+
+		strncpy(ifr.ifr_name, dpaa_intf->name, IFNAMSIZ - 1);
+
+		if (ioctl(socket_fd, SIOCGIFMTU, &ifr) < 0) {
+			DPAA_PMD_ERR("Cannot get interface mtu");
+			close(socket_fd);
+			return -errno;
+		}
+
+		close(socket_fd);
+		DPAA_PMD_INFO("Using kernel configured mtu size(%u)",
+			     ifr.ifr_mtu);
+
+		eth_conf->rxmode.mtu = ifr.ifr_mtu;
 	}
 
 	/* Rx offloads which are enabled by default */
@@ -249,7 +277,8 @@ dpaa_eth_dev_configure(struct rte_eth_dev *dev)
 		max_rx_pktlen = DPAA_MAX_RX_PKT_LEN;
 	}
 
-	fman_if_set_maxfrm(dev->process_private, max_rx_pktlen);
+	if (!fif->is_shared_mac)
+		fman_if_set_maxfrm(dev->process_private, max_rx_pktlen);
 
 	if (rx_offloads & RTE_ETH_RX_OFFLOAD_SCATTER) {
 		DPAA_PMD_DEBUG("enabling scatter mode");
-- 
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-08-12 20:44:04.095906474 +0800
+++ 0047-net-dpaa-forbid-MTU-configuration-for-shared-interfa.patch	2024-08-12 20:44:02.025069281 +0800
@@ -1 +1 @@
-From ee0fa7552a0af02e2151414aeec2ce4e12a2e806 Mon Sep 17 00:00:00 2001
+From 77231b25980ef996ed140b6651826fbeff283104 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit ee0fa7552a0af02e2151414aeec2ce4e12a2e806 ]
@@ -12 +14,0 @@
-Cc: stable at dpdk.org
@@ -21 +23 @@
-index 44bac67803..060b8c678f 100644
+index 779bdc5860..bcb28f33ee 100644