feat: add helper code for supporting the RevolutionPi4 as revpi-firmware

Using factory assigned MAC address from EEPROM instead of compute module
address

Signed-off-by: Martin Schuessler <1407812+c0ffee@users.noreply.github.com>

.kres.yaml

@@ -42,6 +42,7 @@ spec:
     - qemu-guest-agent
     - qlogic-firmware
     - realtek-firmware
+    - revpi-firmware
     - spin
     - stargz-snapshotter
     - tailscale

Makefile

@@ -97,6 +97,7 @@ TARGETS += nvme-cli
 TARGETS += qemu-guest-agent
 TARGETS += qlogic-firmware
 TARGETS += realtek-firmware
+TARGETS += revpi-firmware
 TARGETS += spin
 TARGETS += stargz-snapshotter
 TARGETS += tailscale

firmware/revpi-firmware/manifest.yaml

@@ -0,0 +1,10 @@
+version: v1alpha1
+metadata:
+  name: revpi-firmware
+  version: "$VERSION"
+  author: STACKIT
+  description: |
+    This system extension provides tools e.g. udev rules for the RevolutionPi platform.
+  compatibility:
+    talos:
+      version: ">= v1.0.0"

firmware/revpi-firmware/pkg.yaml

@@ -0,0 +1,38 @@
+name: revpi-firmware
+variant: scratch
+shell: /bin/bash
+dependencies:
+  - stage: base
+steps:
+- env:
+      GOPATH: /tmp/go
+  cachePaths:
+      - /.cache/go-build
+      - /tmp/go/pkg
+- network: default
+  prepare:
+      - |
+        sed -i 's#$VERSION#{{ .VERSION }}#' /pkg/manifest.yaml
+        cd /pkg/src
+        go mod download
+  build:
+      - |
+        cd /pkg/src
+        CGO_ENABLED=0 go build -o ./revpi_mac .
+        strip revpi_mac
+  install:
+      - |
+        mkdir -p /rootfs/usr/lib/udev/rules.d/
+        cp -p /pkg/src/revpi_mac /rootfs/usr/lib/udev/rules.d/
+        echo 'ACTION=="add", SUBSYSTEM=="net", ATTR{type}=="1", DEVPATH=="*/fd580000.ethernet/net/*", PROGRAM="/usr/lib/udev/rules.d/revpi_mac %k 0"' > /rootfs/usr/lib/udev/rules.d/50-revpi.rules
+  test:
+      - |
+        mkdir -p /extensions-validator-rootfs
+        cp -r /rootfs/ /extensions-validator-rootfs/rootfs
+        cp /pkg/manifest.yaml /extensions-validator-rootfs/manifest.yaml
+        /extensions-validator validate --rootfs=/extensions-validator-rootfs --pkg-name="${PKG_NAME}"
+finalize:
+  - from: /rootfs
+    to: /rootfs
+  - from: /pkg/manifest.yaml
+    to: /

firmware/revpi-firmware/src/go.mod

@@ -0,0 +1,9 @@
+module github.com/siderolabs/revpi-firmare
+
+go 1.22
+
+require (
+	github.com/vishvananda/netlink v1.3.0 // indirect
+	github.com/vishvananda/netns v0.0.4 // indirect
+	golang.org/x/sys v0.10.0 // indirect
+)

firmware/revpi-firmware/src/go.sum

@@ -0,0 +1,7 @@
+github.com/vishvananda/netlink v1.3.0 h1:X7l42GfcV4S6E4vHTsw48qbrV+9PVojNfIhZcwQdrZk=
+github.com/vishvananda/netlink v1.3.0/go.mod h1:i6NetklAujEcC6fK0JPjT8qSwWyO0HLn4UKG+hGqeJs=
+github.com/vishvananda/netns v0.0.4 h1:Oeaw1EM2JMxD51g9uhtC0D7erkIjgmj8+JZc26m1YX8=
+github.com/vishvananda/netns v0.0.4/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
+golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

firmware/revpi-firmware/src/main.go

@@ -0,0 +1,76 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/vishvananda/netlink"
+)
+
+func main() {
+	if len(os.Args) < 3 {
+		log.Fatalf("Usage: %s <DEVNAME> <OFFSET>", os.Args)
+	}
+
+	devName := string(os.Args[1])
+	offset, err := strconv.ParseInt(os.Args[2], 10, 64)
+	if err != nil {
+		log.Fatalf("Invalid offset: %v", err)
+	}
+
+	if _, err := os.Stat("/sys/firmware/devicetree/base/hat/custom_5"); os.IsNotExist(err) {
+		os.Exit(1)
+	}
+
+	file, err := os.Open("/sys/firmware/devicetree/base/hat/custom_5")
+	if err != nil {
+		log.Fatalf("Failed to open file: %v", err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	scanner.Scan()
+	baseMAC := scanner.Text()
+	if err := scanner.Err(); err != nil {
+		log.Fatalf("Failed to read file: %v", err)
+	}
+
+	if baseMAC == "" {
+		os.Exit(2)
+	}
+
+	MAC := strings.Split(baseMAC, ":")
+	lastNum, err := strconv.ParseInt(MAC[len(MAC)-1], 16, 16)
+	if err != nil {
+		log.Fatalf("Failed to parse last number: %v", err)
+	}
+	lastNum = lastNum + offset
+	MAC[len(MAC)-1] = fmt.Sprintf("%02x", lastNum)
+
+	link, err := netlink.LinkByName(devName)
+	if err != nil {
+		log.Fatalf("Failed to get interface: %v", err)
+	}
+
+	hwAddr, err := net.ParseMAC(strings.Join(MAC, ":"))
+	if err != nil {
+		log.Fatalf("Failed to parse MAC address: %v", err)
+	}
+
+	err = netlink.LinkSetHardwareAddr(link, hwAddr)
+	if err != nil {
+		log.Fatalf("Failed to set MAC address: %v", err)
+	}
+
+	fmt.Printf("MAC address of %s changed to %s\n", devName, MAC)
+	os.Exit(0)
+}

firmware/revpi-firmware/vars.yaml

@@ -0,0 +1 @@
+VERSION: "v1.0.0"