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SubjectRE: [PATCH v4 09/10] ntb_test: Add a selftest script for the NTB subsystem
Date
From: Logan Gunthorpe
> This script automates testing doorbells, scratchpads and memory windows
> for an NTB device. It can be run locally, with the NTB looped
> back to the same host or use SSH to remotely control the second host.
>
> In the single host case, the script just needs to be passed two
> arguments: a PCI ID for each side of the link. In the two host case
> the -r option must be used to specify the remote hostname (which must
> be SSH accessible and should probably have ssh-keys exchanged).
>
> A sample run looks like this:
>
> $ sudo ./ntb_test.sh 0000:03:00.1 0000:83:00.1 -p 29
> Starting ntb_tool tests...
> Running link tests on: 0000:03:00.1 / 0000:83:00.1
> Passed
> Running link tests on: 0000:83:00.1 / 0000:03:00.1
> Passed
> Running db tests on: 0000:03:00.1 / 0000:83:00.1
> Passed
> Running db tests on: 0000:83:00.1 / 0000:03:00.1
> Passed
> Running spad tests on: 0000:03:00.1 / 0000:83:00.1
> Passed
> Running spad tests on: 0000:83:00.1 / 0000:03:00.1
> Passed
> Running mw0 tests on: 0000:03:00.1 / 0000:83:00.1
> Passed
> Running mw0 tests on: 0000:83:00.1 / 0000:03:00.1
> Passed
> Running mw1 tests on: 0000:03:00.1 / 0000:83:00.1
> Passed
> Running mw1 tests on: 0000:83:00.1 / 0000:03:00.1
> Passed
>
> Starting ntb_pingpong tests...
> Running ping pong tests on: 0000:03:00.1 / 0000:83:00.1
> Passed
>
> Starting ntb_perf tests...
> Running local perf test without DMA
> 0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s
> Passed
> Running remote perf test without DMA
> 0: copied 536870912 bytes in 164453 usecs, 3264 MBytes/s
> Passed
>
> Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
> Acked-by: Shuah Khan <shuahkh@osg.samsung.com>

Acked-by: Allen Hubbe <Allen.Hubbe@emc.com>

> ---
> MAINTAINERS | 1 +
> tools/testing/selftests/ntb/ntb_test.sh | 422 ++++++++++++++++++++++++++++++++
> 2 files changed, 423 insertions(+)
> create mode 100755 tools/testing/selftests/ntb/ntb_test.sh
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 9c567a4..f178e7e 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -7846,6 +7846,7 @@ F: drivers/ntb/
> F: drivers/net/ntb_netdev.c
> F: include/linux/ntb.h
> F: include/linux/ntb_transport.h
> +F: tools/testing/selftests/ntb/
>
> NTB INTEL DRIVER
> M: Jon Mason <jdmason@kudzu.us>
> diff --git a/tools/testing/selftests/ntb/ntb_test.sh
> b/tools/testing/selftests/ntb/ntb_test.sh
> new file mode 100755
> index 0000000..a676d3e
> --- /dev/null
> +++ b/tools/testing/selftests/ntb/ntb_test.sh
> @@ -0,0 +1,422 @@
> +#!/bin/bash
> +# Copyright (c) 2016 Microsemi. All Rights Reserved.
> +#
> +# This program is free software; you can redistribute it and/or
> +# modify it under the terms of the GNU General Public License as
> +# published by the Free Software Foundation; either version 2 of
> +# the License, or (at your option) any later version.
> +#
> +# This program is distributed in the hope that it would be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> +# GNU General Public License for more details.
> +#
> +# Author: Logan Gunthorpe <logang@deltatee.com>
> +
> +REMOTE_HOST=
> +LIST_DEVS=FALSE
> +
> +DEBUGFS=${DEBUGFS-/sys/kernel/debug}
> +
> +PERF_RUN_ORDER=32
> +MAX_MW_SIZE=0
> +RUN_DMA_TESTS=
> +DONT_CLEANUP=
> +MW_SIZE=65536
> +
> +function show_help()
> +{
> + echo "Usage: $0 [OPTIONS] LOCAL_DEV REMOTE_DEV"
> + echo "Run tests on a pair of NTB endpoints."
> + echo
> + echo "If the NTB device loops back to the same host then,"
> + echo "just specifying the two PCI ids on the command line is"
> + echo "sufficient. Otherwise, if the NTB link spans two hosts"
> + echo "use the -r option to specify the hostname for the remote"
> + echo "device. SSH will then be used to test the remote side."
> + echo "An SSH key between the root users of the host would then"
> + echo "be highly recommended."
> + echo
> + echo "Options:"
> + echo " -C don't cleanup ntb modules on exit"
> + echo " -d run dma tests"
> + echo " -h show this help message"
> + echo " -l list available local and remote PCI ids"
> + echo " -r REMOTE_HOST specify the remote's hostname to connect"
> + echo " to for the test (using ssh)"
> + echo " -p NUM ntb_perf run order (default: $PERF_RUN_ORDER)"
> + echo " -w max_mw_size maxmium memory window size"
> + echo
> +}
> +
> +function parse_args()
> +{
> + OPTIND=0
> + while getopts "Cdhlm:r:p:w:" opt; do
> + case "$opt" in
> + C) DONT_CLEANUP=1 ;;
> + d) RUN_DMA_TESTS=1 ;;
> + h) show_help; exit 0 ;;
> + l) LIST_DEVS=TRUE ;;
> + m) MW_SIZE=${OPTARG} ;;
> + r) REMOTE_HOST=${OPTARG} ;;
> + p) PERF_RUN_ORDER=${OPTARG} ;;
> + w) MAX_MW_SIZE=${OPTARG} ;;
> + \?)
> + echo "Invalid option: -$OPTARG" >&2
> + exit 1
> + ;;
> + esac
> + done
> +}
> +
> +parse_args "$@"
> +shift $((OPTIND-1))
> +LOCAL_DEV=$1
> +shift
> +parse_args "$@"
> +shift $((OPTIND-1))
> +REMOTE_DEV=$1
> +shift
> +parse_args "$@"
> +
> +set -e
> +
> +function _modprobe()
> +{
> + modprobe "$@"
> +}
> +
> +function split_remote()
> +{
> + VPATH=$1
> + REMOTE=
> +
> + if [[ "$VPATH" == *":/"* ]]; then
> + REMOTE=${VPATH%%:*}
> + VPATH=${VPATH#*:}
> + fi
> +}
> +
> +function read_file()
> +{
> + split_remote $1
> + if [[ "$REMOTE" != "" ]]; then
> + ssh "$REMOTE" cat "$VPATH"
> + else
> + cat "$VPATH"
> + fi
> +}
> +
> +function write_file()
> +{
> + split_remote $2
> + VALUE=$1
> +
> + if [[ "$REMOTE" != "" ]]; then
> + ssh "$REMOTE" "echo \"$VALUE\" > \"$VPATH\""
> + else
> + echo "$VALUE" > "$VPATH"
> + fi
> +}
> +
> +function link_test()
> +{
> + LOC=$1
> + REM=$2
> + EXP=0
> +
> + echo "Running link tests on: $(basename $LOC) / $(basename $REM)"
> +
> + if ! write_file "N" "$LOC/link" 2> /dev/null; then
> + echo " Unsupported"
> + return
> + fi
> +
> + write_file "N" "$LOC/link_event"
> +
> + if [[ $(read_file "$REM/link") != "N" ]]; then
> + echo "Expected remote link to be down in $REM/link" >&2
> + exit -1
> + fi
> +
> + write_file "Y" "$LOC/link"
> + write_file "Y" "$LOC/link_event"
> +
> + echo " Passed"
> +}
> +
> +function doorbell_test()
> +{
> + LOC=$1
> + REM=$2
> + EXP=0
> +
> + echo "Running db tests on: $(basename $LOC) / $(basename $REM)"
> +
> + write_file "c 0xFFFFFFFF" "$REM/db"
> +
> + for ((i=1; i <= 8; i++)); do
> + let DB=$(read_file "$REM/db") || true
> + if [[ "$DB" != "$EXP" ]]; then
> + echo "Doorbell doesn't match expected value $EXP " \
> + "in $REM/db" >&2
> + exit -1
> + fi
> +
> + let "MASK=1 << ($i-1)" || true
> + let "EXP=$EXP | $MASK" || true
> + write_file "s $MASK" "$LOC/peer_db"
> + done
> +
> + echo " Passed"
> +}
> +
> +function read_spad()
> +{
> + VPATH=$1
> + IDX=$2
> +
> + ROW=($(read_file "$VPATH" | grep -e "^$IDX"))
> + let VAL=${ROW[1]} || true
> + echo $VAL
> +}
> +
> +function scratchpad_test()
> +{
> + LOC=$1
> + REM=$2
> + CNT=$(read_file "$LOC/spad" | wc -l)
> +
> + echo "Running spad tests on: $(basename $LOC) / $(basename $REM)"
> +
> + for ((i = 0; i < $CNT; i++)); do
> + VAL=$RANDOM
> + write_file "$i $VAL" "$LOC/peer_spad"
> + RVAL=$(read_spad "$REM/spad" $i)
> +
> + if [[ "$VAL" != "$RVAL" ]]; then
> + echo "Scratchpad doesn't match expected value $VAL " \
> + "in $REM/spad, got $RVAL" >&2
> + exit -1
> + fi
> +
> + done
> +
> + echo " Passed"
> +}
> +
> +function write_mw()
> +{
> + split_remote $2
> +
> + if [[ "$REMOTE" != "" ]]; then
> + ssh "$REMOTE" \
> + dd if=/dev/urandom "of=$VPATH" 2> /dev/null || true
> + else
> + dd if=/dev/urandom "of=$VPATH" 2> /dev/null || true
> + fi
> +}
> +
> +function mw_test()
> +{
> + IDX=$1
> + LOC=$2
> + REM=$3
> +
> + echo "Running $IDX tests on: $(basename $LOC) / $(basename $REM)"
> +
> + write_mw "$LOC/$IDX"
> +
> + split_remote "$LOC/$IDX"
> + if [[ "$REMOTE" == "" ]]; then
> + A=$VPATH
> + else
> + A=/tmp/ntb_test.$$.A
> + ssh "$REMOTE" cat "$VPATH" > "$A"
> + fi
> +
> + split_remote "$REM/peer_$IDX"
> + if [[ "$REMOTE" == "" ]]; then
> + B=$VPATH
> + else
> + B=/tmp/ntb_test.$$.B
> + ssh "$REMOTE" cat "$VPATH" > "$B"
> + fi
> +
> + cmp -n $MW_SIZE "$A" "$B"
> + if [[ $? != 0 ]]; then
> + echo "Memory window $MW did not match!" >&2
> + fi
> +
> + if [[ "$A" == "/tmp/*" ]]; then
> + rm "$A"
> + fi
> +
> + if [[ "$B" == "/tmp/*" ]]; then
> + rm "$B"
> + fi
> +
> + echo " Passed"
> +}
> +
> +function pingpong_test()
> +{
> + LOC=$1
> + REM=$2
> +
> + echo "Running ping pong tests on: $(basename $LOC) / $(basename $REM)"
> +
> + LOC_START=$(read_file $LOC/count)
> + REM_START=$(read_file $REM/count)
> +
> + sleep 7
> +
> + LOC_END=$(read_file $LOC/count)
> + REM_END=$(read_file $REM/count)
> +
> + if [[ $LOC_START == $LOC_END ]] || [[ $REM_START == $REM_END ]]; then
> + echo "Ping pong counter not incrementing!" >&2
> + exit 1
> + fi
> +
> + echo " Passed"
> +}
> +
> +function perf_test()
> +{
> + USE_DMA=$1
> +
> + if [[ $USE_DMA == "1" ]]; then
> + WITH="with"
> + else
> + WITH="without"
> + fi
> +
> + _modprobe ntb_perf run_order=$PERF_RUN_ORDER \
> + max_mw_size=$MAX_MW_SIZE use_dma=$USE_DMA
> +
> + echo "Running local perf test $WITH DMA"
> + write_file "" $LOCAL_PERF/run
> + echo -n " "
> + read_file $LOCAL_PERF/run
> + echo " Passed"
> +
> + echo "Running remote perf test $WITH DMA"
> + write_file "" $REMOTE_PERF/run
> + echo -n " "
> + read_file $LOCAL_PERF/run
> + echo " Passed"
> +
> + _modprobe -r ntb_perf
> +}
> +
> +function ntb_tool_tests()
> +{
> + LOCAL_TOOL=$DEBUGFS/ntb_tool/$LOCAL_DEV
> + REMOTE_TOOL=$REMOTE_HOST:$DEBUGFS/ntb_tool/$REMOTE_DEV
> +
> + echo "Starting ntb_tool tests..."
> +
> + _modprobe ntb_tool
> +
> + write_file Y $LOCAL_TOOL/link_event
> + write_file Y $REMOTE_TOOL/link_event
> +
> + link_test $LOCAL_TOOL $REMOTE_TOOL
> + link_test $REMOTE_TOOL $LOCAL_TOOL
> +
> + for PEER_TRANS in $(ls $LOCAL_TOOL/peer_trans*); do
> + PT=$(basename $PEER_TRANS)
> + write_file $MW_SIZE $LOCAL_TOOL/$PT
> + write_file $MW_SIZE $REMOTE_TOOL/$PT
> + done
> +
> + doorbell_test $LOCAL_TOOL $REMOTE_TOOL
> + doorbell_test $REMOTE_TOOL $LOCAL_TOOL
> + scratchpad_test $LOCAL_TOOL $REMOTE_TOOL
> + scratchpad_test $REMOTE_TOOL $LOCAL_TOOL
> +
> + for MW in $(ls $LOCAL_TOOL/mw*); do
> + MW=$(basename $MW)
> +
> + mw_test $MW $LOCAL_TOOL $REMOTE_TOOL
> + mw_test $MW $REMOTE_TOOL $LOCAL_TOOL
> + done
> +
> + _modprobe -r ntb_tool
> +}
> +
> +function ntb_pingpong_tests()
> +{
> + LOCAL_PP=$DEBUGFS/ntb_pingpong/$LOCAL_DEV
> + REMOTE_PP=$REMOTE_HOST:$DEBUGFS/ntb_pingpong/$REMOTE_DEV
> +
> + echo "Starting ntb_pingpong tests..."
> +
> + _modprobe ntb_pingpong
> +
> + pingpong_test $LOCAL_PP $REMOTE_PP
> +
> + _modprobe -r ntb_pingpong
> +}
> +
> +function ntb_perf_tests()
> +{
> + LOCAL_PERF=$DEBUGFS/ntb_perf/$LOCAL_DEV
> + REMOTE_PERF=$REMOTE_HOST:$DEBUGFS/ntb_perf/$REMOTE_DEV
> +
> + echo "Starting ntb_perf tests..."
> +
> + perf_test 0
> +
> + if [[ $RUN_DMA_TESTS ]]; then
> + perf_test 1
> + fi
> +}
> +
> +function cleanup()
> +{
> + set +e
> + _modprobe -r ntb_tool 2> /dev/null
> + _modprobe -r ntb_perf 2> /dev/null
> + _modprobe -r ntb_pingpong 2> /dev/null
> + _modprobe -r ntb_transport 2> /dev/null
> + set -e
> +}
> +
> +cleanup
> +
> +if ! [[ $$DONT_CLEANUP ]]; then
> + trap cleanup EXIT
> +fi
> +
> +if [ "$(id -u)" != "0" ]; then
> + echo "This script must be run as root" 1>&2
> + exit 1
> +fi
> +
> +if [[ "$LIST_DEVS" == TRUE ]]; then
> + echo "Local Devices:"
> + ls -1 /sys/bus/ntb/devices
> + echo
> +
> + if [[ "$REMOTE_HOST" != "" ]]; then
> + echo "Remote Devices:"
> + ssh $REMOTE_HOST ls -1 /sys/bus/ntb/devices
> + fi
> +
> + exit 0
> +fi
> +
> +if [[ "$LOCAL_DEV" == $"" ]] || [[ "$REMOTE_DEV" == $"" ]]; then
> + show_help
> + exit 1
> +fi
> +
> +ntb_tool_tests
> +echo
> +ntb_pingpong_tests
> +echo
> +ntb_perf_tests
> +echo
> --
> 2.1.4


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