feat(retimer): Add tools to turn off TX on unused lanes
retimer_lanes.sh turns TX off / on, or shows the state, for a lane map of one Agera3 retimer on both the sys and the line side, by TX squelch (default) or lane power-down. It refuses 'off' on lanes with RX PMD lock unless --force is given, and reads the state back to print PASS or FAIL. unused_lanes.sh applies that to a built-in table of 14 retimer rows and one direct-TH6 row (TSC31) on each switch board; TH6 rows go through 'port ... enable=' in the syncd container. --asic, --th6, --only and --force select what it touches; it ends with ok / refused / failed counts. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0131orciRKrejchsuDk6UpXk
This commit is contained in:
Claude Opus 5.5
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#!/bin/bash
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# Turn TX off/on, or show state, for lanes of one Agera3 retimer on the sys and line side.
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usage() {
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cat <<USAGE
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Usage: $0 <asic 0|1> <retimer-addr> <lane_map> <off|on|status> [--method squelch|power] [--force]
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squelch TX squelch on sys and line side; lanes stay powered (works with the installed agera3)
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power TX+RX lane power-down, the call SONiC makes on admin down; needs an agera3 with 'power'
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--force allow 'off' on lanes that receive a signal
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USAGE
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exit 1
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}
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[ $# -ge 4 ] || usage
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ASIC=$1; ADDR=$2; MAP=$3; ACT=$4; shift 4
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METHOD=squelch; FORCE=0
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while [ $# -gt 0 ]; do
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case $1 in
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--method) METHOD=$2; shift 2 ;;
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--force) FORCE=1; shift ;;
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*) usage ;;
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esac
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done
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case $ASIC in 0|1) ;; *) usage ;; esac
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case $ACT in off|on|status) ;; *) usage ;; esac
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case $METHOD in squelch|power) ;; *) usage ;; esac
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[[ $ADDR =~ ^0x[0-9a-fA-F]+$ && $MAP =~ ^0x[0-9a-fA-F]{1,2}$ ]] || usage
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MAPV=$((MAP))
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[ "$MAPV" -ge 1 ] || usage
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ag() { sudo timeout 30 agera3 "$ASIC" "$ADDR" --no-cleanup "$@" </dev/null 2>&1; }
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if [ "$METHOD" = power ] && ! sudo agera3 -h 2>&1 | grep -q -E '^\s+power '; then
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echo "agera3 on this system has no 'power' command; use --method squelch"
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exit 4
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fi
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lock_mask() {
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ag rx-pmd-lock get side "$1" lane_map=0xff | awk '$2=="|" && $3=="LOCKED" {m += 2^$1} END {printf "%d", m}'
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}
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lane_tx() {
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local lm
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lm=$(printf '0x%02x' $((1 << $2)))
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if [ "$METHOD" = squelch ]; then
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ag squelch get tx "$1" lane_map=$lm | sed -n 's/.*squelch is \([A-Z]*\).*/\1/p' | awk '{print ($1 == "CLEAR") ? "on" : "off"}'
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else
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ag power get "$1" lane_map=$lm | awk -v l="$2" '$1 == l && $2 == "|" {print $3}'
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fi
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}
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txoff_mask() {
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local m=0 l s
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for l in 0 1 2 3 4 5 6 7; do
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[ $((MAPV >> l & 1)) = 1 ] || continue
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s=$(lane_tx "$1" $l)
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case $s in
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off) m=$((m | 1 << l)) ;;
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on) ;;
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*) echo "unknown"; return ;;
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esac
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done
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printf '0x%02x' $m
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}
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report() {
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local side
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for side in sys line; do
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printf 'asic%s %-6s %-4s lane_map=0x%02x rx_lock=0x%02x tx_off=%s (%s)\n' \
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"$ASIC" "$ADDR" "$side" "$MAPV" "$(lock_mask $side)" "$(txoff_mask $side)" "$METHOD"
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done
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}
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[ "$ACT" = status ] && { report; exit 0; }
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if [ "$ACT" = off ] && [ $FORCE = 0 ]; then
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live=$(( ($(lock_mask sys) | $(lock_mask line)) & MAPV ))
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if [ $live != 0 ]; then
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printf 'REFUSED: asic%s %s lanes 0x%02x receive a signal; use --force to override\n' "$ASIC" "$ADDR" $live
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exit 2
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fi
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fi
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for side in sys line; do
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if [ "$METHOD" = squelch ]; then
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ag squelch set tx $side lane_map=$MAP $([ $ACT = off ] && echo enable || echo disable)
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else
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ag power set $side lane_map=$MAP $ACT
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fi | grep -E 'FAIL|Error'
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done
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want=0x00; [ "$ACT" = off ] && want=$(printf '0x%02x' $MAPV)
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rc=0
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for side in sys line; do
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got=$(txoff_mask $side)
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printf 'asic%s %-6s %-4s lane_map=0x%02x tx_off=%s expected=%s (%s)\n' "$ASIC" "$ADDR" "$side" "$MAPV" "$got" "$want" "$METHOD"
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[ "$got" = "$want" ] || rc=3
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done
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[ $rc = 0 ] && echo "PASS" || echo "FAIL"
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exit $rc
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@@ -0,0 +1,103 @@
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#!/bin/bash
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# Apply off/on/status to the unused retimer lanes and TH6 ports listed below, on each ASIC.
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# Same rows apply to both switch boards. lanes: retimer lane_map, sys and line side.
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# tsc: TH6 TSC as in HW docs and the "#TSCn" labels in th6-helios.config.yml.
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# th6_ports: BCM shell port name or range; used by th6 rows, and by retimer rows with --th6.
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UNUSED=$(cat <<'TABLE'
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# kind target lanes refdes tsc th6_ports note
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retimer 0x102 0xff U22 23 cd80-cd83 no used ports
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retimer 0x142 0xff U32 38 cd148-cd151 no used ports
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retimer 0x21 0xff U39 7 cd16-cd19 no used ports
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retimer 0x240 0xff U67 54 cd212-cd215 no used ports
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retimer 0x264 0xff U73 62 cd244-cd247 no used ports
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retimer 0x48 0xff U82 15 cd48-cd51 no used ports
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retimer 0x202 0xff U92 46 cd180-cd183 no used ports
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retimer 0x122 0x30 U18 27 cd111 lanes 4,5 unused
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retimer 0x248 0x30 U63 58 cd235 lanes 4,5 unused
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retimer 0x2 0x30 U70 3 cd15 lanes 4,5 unused
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retimer 0x40 0x30 U75 11 cd47 lanes 4,5 unused
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retimer 0x162 0x30 U80 42 cd171 lanes 4,5 unused
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retimer 0x222 0x30 U87 50 cd203 lanes 4,5 unused
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retimer 0x62 0x30 U96 19 cd79 lanes 4,5 unused
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th6 TSC31 - - 31 cd112-cd115 direct TH6 TSC, no retimer
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# th6 TSC34 - - 34 cd139 direct TH6 TSC34 lanes 6,7; down and unused in full rack, not in HW list
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TABLE
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)
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DIR=$(cd "$(dirname "$0")" && pwd)
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usage() {
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cat <<USAGE
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Usage: $0 <off|on|status> [--asic 0|1|all] [--method squelch|power] [--th6] [--only <target>] [--force]
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retimer rows: retimer lanes on sys and line side, via retimer_lanes.sh
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th6 rows : TH6 ports in the th6_ports column, via the BCM shell
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--th6 : also act on the th6_ports of retimer rows (TH6 ports feeding those retimer lanes)
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--only : act on one row, matched by its target column (e.g. 0x102 or TSC31)
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USAGE
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exit 1
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}
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[ $# -ge 1 ] || usage
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ACT=$1; shift
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ASICS="0 1"; METHOD=squelch; TH6=0; ONLY=""; FORCE=""
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while [ $# -gt 0 ]; do
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case $1 in
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--asic) case $2 in all) ASICS="0 1" ;; 0|1) ASICS=$2 ;; *) usage ;; esac; shift 2 ;;
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--method) METHOD=$2; shift 2 ;;
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--th6) TH6=1; shift ;;
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--only) ONLY=$2; shift 2 ;;
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--force) FORCE=--force; shift ;;
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*) usage ;;
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esac
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done
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case $ACT in off|on|status) ;; *) usage ;; esac
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[ -x "$DIR/retimer_lanes.sh" ] || { echo "retimer_lanes.sh not found next to $0"; exit 1; }
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bcm() { docker exec "syncd$1" bcmcmd -t 60 "$2" </dev/null 2>&1 | tr -d '\r'; }
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ps_state() { bcm "$1" "ps $2" | sed -E 's/\( +/(/' | awk '$1 ~ /^cd[0-9]+\(/ {print $1, $2}'; }
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th6_ports() {
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local a=$1 act=$2 ports=$3 st
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st=$(ps_state "$a" "$ports")
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[ -n "$st" ] || { echo "asic$a th6 $ports: no such ports"; return 3; }
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if [ "$act" = status ]; then
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echo "$st" | sed "s/^/asic$a th6 /"
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return 0
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fi
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if [ "$act" = off ] && [ -z "$FORCE" ] && echo "$st" | awk '$2 == "up"' | grep -q .; then
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echo "REFUSED: asic$a th6 $ports has link up: $(echo "$st" | awk '$2 == "up" {printf "%s ", $1}')"
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return 2
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fi
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bcm "$a" "port $ports enable=$([ "$act" = off ] && echo false || echo true)" >/dev/null
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sleep 1
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st=$(ps_state "$a" "$ports")
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echo "$st" | sed "s/^/asic$a th6 /"
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if [ "$act" = off ]; then
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echo "$st" | awk '$2 != "!ena"' | grep -q . && return 3
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else
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echo "$st" | awk '$2 == "!ena"' | grep -q . && return 3
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fi
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return 0
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}
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mapfile -t ROWS < <(grep -v -E '^[[:space:]]*(#|$)' <<<"$UNUSED")
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ok=0; refused=0; failed=0
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for a in $ASICS; do
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for row in "${ROWS[@]}"; do
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read -r kind target lanes refdes tsc ports note <<<"$row"
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[ -n "$ONLY" ] && [ "$target" != "$ONLY" ] && continue
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echo "== asic$a $kind $target refdes=$refdes TSC$tsc th6=$ports: $note"
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rc=0
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case $kind in
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retimer)
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"$DIR/retimer_lanes.sh" "$a" "$target" "$lanes" "$ACT" --method "$METHOD" $FORCE; rc=$?
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if [ $TH6 = 1 ] && [ "$ports" != "-" ] && [ $rc != 2 ]; then
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th6_ports "$a" "$ACT" "$ports" || rc=$?
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fi ;;
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th6) th6_ports "$a" "$ACT" "$ports"; rc=$? ;;
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*) echo "unknown kind '$kind'"; rc=1 ;;
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esac
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case $rc in 0) ok=$((ok + 1)) ;; 2) refused=$((refused + 1)) ;; *) failed=$((failed + 1)) ;; esac
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done
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done
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echo "== $ACT done: ok=$ok refused=$refused failed=$failed"
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[ $failed = 0 ]
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