List IOMMU Groups and the connected USB Devices

iommu.sh

#!/usr/bin/env bash

shopt -s nullglob
lastgroup=""
for g in `find /sys/kernel/iommu_groups/* -maxdepth 0 -type d | sort -V`; do
    for d in $g/devices/*; do
        if [ "${g##*/}" != "$lastgroup" ]; then
            echo -en "Group ${g##*/}:\t"
        else
            echo -en "\t\t"
        fi
        lastgroup=${g##*/}
        lspci -nms ${d##*/} | awk -F'"' '{printf "[%s:%s]", $4, $6}'
        if [[ -e "$d"/reset ]]; then echo -en " [R] "; else echo -en "     "; fi

        lspci -mms ${d##*/} | awk -F'"' '{printf "%s %-40s %s\n", $1, $2, $6}'
        for u in ${d}/usb*/; do
            bus=$(cat "${u}/busnum")
            lsusb -s $bus: | \
                awk '{gsub(/:/,"",$4); printf "%s|%s %s %s %s|", $6, $1, $2, $3, $4; for(i=7;i<=NF;i++){printf "%s ", $i}; printf "\n"}' | \
                awk -F'|' '{printf "USB:\t\t[%s]\t\t %-40s %s\n", $1, $2, $3}'
        done
    done
done

Thank you!

Is there any way to expand this to show more details about the Ethernet controllers e.g. their MAC address? When passing raw devices through in Proxmox etc it is nearly impossible to correctly match IOMMU group to Ethernet controllers as it doesn't show which connected NICs relate to each IOMMU group.

@digitalformula yeah something like this (quick hack):

iommu group 15:
02:00.0 Network controller [0280]: Intel Corporation Wi-Fi 6E(802.11ax) AX210/AX1675* 2x2 [Typhoon Peak] [8086:2725] (rev 1a)
net:    wlp2s0  mac ff:ff:ff:ff:ff:ff

I adapted this script a bit to be posix shell and only what I need, but this is what I abuse:

cur=''
for dir in $(find /sys/kernel/iommu_groups/ -type l | sort -n -k5 -t/); do
  iommu=${dir#*/iommu_groups/*}
  iommu=${iommu%%/*}
  if [ "${iommu}" != "${cur}" ]; then
    printf 'iommu group %s:\n' "${iommu}"
    cur="${iommu}"
  fi

  lspci -nns "${dir##*/}"

  for usb in ${dir}/usb*/; do
    if [ -e "${usb}/busnum" ]; then
      bus=$(cat "${usb}/busnum")
      lsusb -s "${bus}": \
        | awk '{gsub(/:/,"",$4); printf "%s|%s %s %s %s|", $6, $1, $2, $3, $4; for(i=7;i<=NF;i++){printf "%s ", $i}; printf "\n"}' \
        | awk -F'|' '{printf "usb:\t[%s]\t %-40s %s\n", $1, $2, $3}'
    fi
  done

  for net in ${dir}/net/*; do
    if [ -e "${net}/address" ]; then
      name=$(basename "${net}")
      mac=$(cat "${net}/address")
      printf "net:\t%s\tmac %s\n" "${name}" "${mac}"
    fi
  done
done

You could snag more stuff out of the device tree but device name/mac is a decent enough start.

@digitalformula yeah something like this (quick hack):

iommu group 15:
02:00.0 Network controller [0280]: Intel Corporation Wi-Fi 6E(802.11ax) AX210/AX1675* 2x2 [Typhoon Peak] [8086:2725] (rev 1a)
net:    wlp2s0  mac ff:ff:ff:ff:ff:ff

I adapted this script a bit to be posix shell and only what I need, but this is what I abuse:

cur=''
for dir in $(find /sys/kernel/iommu_groups/ -type l | sort -n -k5 -t/); do
  iommu=${dir#*/iommu_groups/*}
  iommu=${iommu%%/*}
  if [ "${iommu}" != "${cur}" ]; then
    printf 'iommu group %s:\n' "${iommu}"
    cur="${iommu}"
  fi

  lspci -nns "${dir##*/}"

  for usb in ${dir}/usb*/; do
    if [ -e "${usb}/busnum" ]; then
      bus=$(cat "${usb}/busnum")
      lsusb -s "${bus}": \
        | awk '{gsub(/:/,"",$4); printf "%s|%s %s %s %s|", $6, $1, $2, $3, $4; for(i=7;i<=NF;i++){printf "%s ", $i}; printf "\n"}' \
        | awk -F'|' '{printf "usb:\t[%s]\t %-40s %s\n", $1, $2, $3}'
    fi
  done

  for net in ${dir}/net/*; do
    if [ -e "${net}/address" ]; then
      name=$(basename "${net}")
      mac=$(cat "${net}/address")
      printf "net:\t%s\tmac %s\n" "${name}" "${mac}"
    fi
  done
done

You could snag more stuff out of the device tree but device name/mac is a decent enough start.

Brilliant, thanks.