update pci_passthrough_helpers.sh

scripts/global/pci_passthrough_helpers.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+if [[ -n "${__PROXMENUX_PCI_PASSTHROUGH_HELPERS__}" ]]; then
+  return 0
+fi
+__PROXMENUX_PCI_PASSTHROUGH_HELPERS__=1
+
+function _pci_is_iommu_active() {
+  grep -qE 'intel_iommu=on|amd_iommu=on' /proc/cmdline 2>/dev/null || return 1
+  [[ -d /sys/kernel/iommu_groups ]] || return 1
+  find /sys/kernel/iommu_groups -mindepth 1 -maxdepth 1 -type d -print -quit 2>/dev/null | grep -q .
+}
+
+function _pci_next_hostpci_index() {
+  local vmid="$1"
+  local idx=0
+  local hostpci_existing
+
+  hostpci_existing=$(qm config "$vmid" 2>/dev/null) || return 1
+  while grep -q "^hostpci${idx}:" <<< "$hostpci_existing"; do
+    idx=$((idx + 1))
+  done
+  echo "$idx"
+}
+
+function _pci_slot_assigned_to_vm() {
+  local pci_full="$1"
+  local vmid="$2"
+  local slot_base
+  slot_base="${pci_full#0000:}"
+  slot_base="${slot_base%.*}"
+
+  qm config "$vmid" 2>/dev/null \
+    | grep -qE "^hostpci[0-9]+:.*(0000:)?${slot_base}(\\.[0-7])?([,[:space:]]|$)"
+}
+
+function _pci_function_assigned_to_vm() {
+  local pci_full="$1"
+  local vmid="$2"
+  local bdf slot func pattern
+  bdf="${pci_full#0000:}"
+  slot="${bdf%.*}"
+  func="${bdf##*.}"
+
+  if [[ "$func" == "0" ]]; then
+    pattern="^hostpci[0-9]+:.*(0000:)?(${bdf}|${slot})([,:[:space:]]|$)"
+  else
+    pattern="^hostpci[0-9]+:.*(0000:)?${bdf}([,[:space:]]|$)"
+  fi
+
+  qm config "$vmid" 2>/dev/null | grep -qE "$pattern"
+}