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board/nvidia/bf3: set eth names according to doc

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Set the names of the Ethernet interfaces that are exposed from a first
boot so they are aligned with those described by Mellanox/NVIDIA
documentation for the BF3.

Those tmfifo and oob interface names are describeded at:
  https://docs.nvidia.com/networking/display/bluefielddpuosv460/host-side+interface+configuration

When running the native Ubuntu on the BF3 board, the following udev
rules are set:
$ cat /etc/udev/rules.d/91-tmfifo_net.rules
SUBSYSTEM=="net", ACTION=="add", DEVPATH=="/devices/platform/MLNXBF01:00/virtio1/net/eth[0-9]", NAME="tmfifo_net0"

$ cat /etc/udev/rules.d/92-oob_net.rules
SUBSYSTEM=="net", ACTION=="add", DEVPATH=="/devices/platform/MLNXBF17:00/net/e*", NAME="oob_net0", RUN+="/sbin/sysctl -w net.ipv4.conf.oob_net0.arp_notify=1"

The default CX ports of the BF3 are:
ubuntu@bf$ ip link show p0
4: p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode
   DEFAULT group default qlen 1000
    link/ether a0:88:c2:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    altname enp3s0f0np0
ubuntu@bf$ ip link show p1
5: p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode
   DEFAULT group default qlen 1000
    link/ether a0:88:c2:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    altname enp3s0f1np1

Signed-off-by: Vincent Jardin <vjardin@free.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>
This commit is contained in:
Vincent Jardin
2025-02-03 19:00:24 +01:00
committed by Julien Olivain
parent 2e8a600fea
commit b77e468559
2 changed files with 69 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
board/nvidia/bf3/rootfs_overlay/etc/init.d/S04ifnames Executable file
View File

@@ -0,0 +1,66 @@
#!/bin/sh
# Rename the board's interfaces according to Mellanox/NVIDIA's documentation
DESC="bf3 interface renaming"
DAEMON=ifnames
rename_interface() {
bus_info=$1
new_name=$2
alt_name=$3
# Find the current interface name based on bus-info
iface=$(find /sys/class/net -type l -exec sh -c '
for i; do
[ "$(basename "$(readlink -f "$i"/device)")" = "$0" ] && basename "$i"
done
' "$bus_info" {} +)
# Rename the interface if found
if [ -n "$iface" ]; then
ip link set "$iface" name "$new_name"
printf "%s to %s" "$iface" "$new_name"
# Set altname if provided
if [ -n "$alt_name" ]; then
ip link property add dev "$new_name" altname "$alt_name"
printf "/%s" "$alt_name"
fi
printf "; "
else
echo "$bus_info not found"
fi
}
case "$1" in
start)
printf "Starting %s [%s]: " "$DESC" "$DAEMON"
# Initialize success flag
rename_allok=0
rename_interface "0000:03:00.0" "p0" "enp3s0f0np0" || rename_allok=1
rename_interface "0000:03:00.1" "p1" "enp3s0f1np1" || rename_allok=1
rename_interface "MLNXBF17:00" "oob_net0" "enamlnxbf17i0" || rename_allok=1
rename_interface "virtio1" "tmfifo_net0" || rename_allok=1
if [ "$rename_allok" -eq 0 ]; then
echo "OK"
else
echo "FAIL"
fi
;;
stop) ;;
restart)
# Optional: Handle restart by calling start after stop
$0 stop
$0 start
;;
*)
echo "Usage: $0 {start|stop|restart}"
exit 1
;;
esac
exit 0

3
configs/nvidia_bf3_defconfig
View File

@@ -3,11 +3,14 @@ BR2_cortex_a78=y
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_11=y
BR2_GLOBAL_PATCH_DIR="board/nvidia/bf3/patches"
BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
BR2_ROOTFS_OVERLAY="board/nvidia/bf3/rootfs_overlay"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_VERSION=y
BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.11.6"
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/nvidia/bf3/linux.config"
BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
BR2_PACKAGE_LIBMNL=y
BR2_PACKAGE_IPROUTE2=y
BR2_TARGET_ROOTFS_INITRAMFS=y
# BR2_TARGET_ROOTFS_TAR is not set