A GPU is named from an embedded PCI ID table, the same on every machine

The router has no lspci, so its GeminiLake chip came up as 'Intel GPU 3185' beside the identical chip's 'Intel UHD Graphics 600' on hamtv. A trimmed pci.ids — the graphics devices of Intel, AMD and NVIDIA, and the virtual GPUs, 115 KB — rides in the binary and is consulted first; lspci is the fallback for a card newer than the table. scripts/pci-ids-gpu.sh regenerates it from the hub's copy. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-10-02 23:48:05 -07:00
parent b5cecce435
commit 3a58e265c6
6 changed files with 3085 additions and 2 deletions
@@ -0,0 +1,47 @@
+package metrics
+
+// A trimmed PCI ID database, embedded, so a GPU is named the same on every machine —
+// "Intel UHD Graphics 600" — whether or not that machine has pciutils. OpenWrt has neither
+// lspci nor pci.ids, and the router's GPU came up as "Intel GPU 3185" beside its twin's
+// "Intel UHD Graphics 600" until this. scripts/pci-ids-gpu.sh regenerates the file.
+
+import (
+	_ "embed"
+	"strings"
+	"sync"
+)
+
+//go:embed pciids_gpu.txt
+var pciIDsGPU string
+
+var pciTable struct {
+	once    sync.Once
+	vendors map[string]string // "8086" → "Intel Corporation"
+	devices map[string]string // "8086:3185" → "GeminiLake [UHD Graphics 600]"
+}
+
+// pciName looks a vendor and device ID up (hex, lower case, no 0x): the vendor's name and
+// the device's; empty where unknown.
+func pciName(vendor, device string) (string, string) {
+	pciTable.once.Do(func() {
+		pciTable.vendors, pciTable.devices = map[string]string{}, map[string]string{}
+		cur := ""
+		for _, line := range strings.Split(pciIDsGPU, "\n") {
+			switch {
+			case line == "" || line[0] == '#':
+			case line[0] == '\t':
+				if cur == "" || len(line) < 7 || line[1] == '\t' {
+					continue // a subsystem, or a device before any vendor
+				}
+				pciTable.devices[cur+":"+line[1:5]] = strings.TrimSpace(line[5:])
+			default:
+				if len(line) >= 6 {
+					cur = line[:4]
+					pciTable.vendors[cur] = strings.TrimSpace(line[4:])
+				}
+			}
+		}
+	})
+	vendor, device = strings.ToLower(vendor), strings.ToLower(device)
+	return pciTable.vendors[vendor], pciTable.devices[vendor+":"+device]
+}