ntb_test: Add a selftest script for the NTB subsystem
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> Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Logan Gunthorpe
Jon Mason
parent
35539b54ac
commit
a9c59ef774
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@ -8131,6 +8131,7 @@ F: drivers/ntb/
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F: drivers/net/ntb_netdev.c
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F: include/linux/ntb.h
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F: include/linux/ntb_transport.h
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F: tools/testing/selftests/ntb/
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NTB INTEL DRIVER
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M: Jon Mason <jdmason@kudzu.us>
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@ -0,0 +1,422 @@
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#!/bin/bash
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# Copyright (c) 2016 Microsemi. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# Author: Logan Gunthorpe <logang@deltatee.com>
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REMOTE_HOST=
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LIST_DEVS=FALSE
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DEBUGFS=${DEBUGFS-/sys/kernel/debug}
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PERF_RUN_ORDER=32
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MAX_MW_SIZE=0
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RUN_DMA_TESTS=
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DONT_CLEANUP=
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MW_SIZE=65536
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function show_help()
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{
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echo "Usage: $0 [OPTIONS] LOCAL_DEV REMOTE_DEV"
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echo "Run tests on a pair of NTB endpoints."
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echo
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echo "If the NTB device loops back to the same host then,"
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echo "just specifying the two PCI ids on the command line is"
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echo "sufficient. Otherwise, if the NTB link spans two hosts"
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echo "use the -r option to specify the hostname for the remote"
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echo "device. SSH will then be used to test the remote side."
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echo "An SSH key between the root users of the host would then"
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echo "be highly recommended."
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echo
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echo "Options:"
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echo " -C don't cleanup ntb modules on exit"
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echo " -d run dma tests"
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echo " -h show this help message"
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echo " -l list available local and remote PCI ids"
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echo " -r REMOTE_HOST specify the remote's hostname to connect"
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echo " to for the test (using ssh)"
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echo " -p NUM ntb_perf run order (default: $PERF_RUN_ORDER)"
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echo " -w max_mw_size maxmium memory window size"
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echo
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}
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function parse_args()
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{
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OPTIND=0
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while getopts "Cdhlm:r:p:w:" opt; do
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case "$opt" in
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C) DONT_CLEANUP=1 ;;
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d) RUN_DMA_TESTS=1 ;;
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h) show_help; exit 0 ;;
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l) LIST_DEVS=TRUE ;;
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m) MW_SIZE=${OPTARG} ;;
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r) REMOTE_HOST=${OPTARG} ;;
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p) PERF_RUN_ORDER=${OPTARG} ;;
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w) MAX_MW_SIZE=${OPTARG} ;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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exit 1
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;;
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esac
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done
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}
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parse_args "$@"
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shift $((OPTIND-1))
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LOCAL_DEV=$1
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shift
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parse_args "$@"
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shift $((OPTIND-1))
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REMOTE_DEV=$1
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shift
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parse_args "$@"
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set -e
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function _modprobe()
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{
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modprobe "$@"
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}
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function split_remote()
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{
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VPATH=$1
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REMOTE=
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if [[ "$VPATH" == *":/"* ]]; then
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REMOTE=${VPATH%%:*}
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VPATH=${VPATH#*:}
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fi
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}
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function read_file()
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{
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split_remote $1
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if [[ "$REMOTE" != "" ]]; then
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ssh "$REMOTE" cat "$VPATH"
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else
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cat "$VPATH"
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fi
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}
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function write_file()
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{
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split_remote $2
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VALUE=$1
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if [[ "$REMOTE" != "" ]]; then
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ssh "$REMOTE" "echo \"$VALUE\" > \"$VPATH\""
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else
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echo "$VALUE" > "$VPATH"
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fi
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}
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function link_test()
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{
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LOC=$1
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REM=$2
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EXP=0
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echo "Running link tests on: $(basename $LOC) / $(basename $REM)"
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if ! write_file "N" "$LOC/link" 2> /dev/null; then
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echo " Unsupported"
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return
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fi
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write_file "N" "$LOC/link_event"
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if [[ $(read_file "$REM/link") != "N" ]]; then
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echo "Expected remote link to be down in $REM/link" >&2
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exit -1
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fi
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write_file "Y" "$LOC/link"
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write_file "Y" "$LOC/link_event"
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echo " Passed"
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}
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function doorbell_test()
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{
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LOC=$1
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REM=$2
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EXP=0
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echo "Running db tests on: $(basename $LOC) / $(basename $REM)"
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write_file "c 0xFFFFFFFF" "$REM/db"
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for ((i=1; i <= 8; i++)); do
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let DB=$(read_file "$REM/db") || true
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if [[ "$DB" != "$EXP" ]]; then
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echo "Doorbell doesn't match expected value $EXP " \
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"in $REM/db" >&2
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exit -1
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fi
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let "MASK=1 << ($i-1)" || true
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let "EXP=$EXP | $MASK" || true
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write_file "s $MASK" "$LOC/peer_db"
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done
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echo " Passed"
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}
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function read_spad()
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{
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VPATH=$1
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IDX=$2
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ROW=($(read_file "$VPATH" | grep -e "^$IDX"))
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let VAL=${ROW[1]} || true
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echo $VAL
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}
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function scratchpad_test()
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{
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LOC=$1
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REM=$2
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CNT=$(read_file "$LOC/spad" | wc -l)
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echo "Running spad tests on: $(basename $LOC) / $(basename $REM)"
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for ((i = 0; i < $CNT; i++)); do
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VAL=$RANDOM
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write_file "$i $VAL" "$LOC/peer_spad"
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RVAL=$(read_spad "$REM/spad" $i)
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if [[ "$VAL" != "$RVAL" ]]; then
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echo "Scratchpad doesn't match expected value $VAL " \
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"in $REM/spad, got $RVAL" >&2
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exit -1
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fi
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done
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echo " Passed"
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}
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function write_mw()
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{
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split_remote $2
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if [[ "$REMOTE" != "" ]]; then
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ssh "$REMOTE" \
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dd if=/dev/urandom "of=$VPATH" 2> /dev/null || true
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else
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dd if=/dev/urandom "of=$VPATH" 2> /dev/null || true
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fi
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}
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function mw_test()
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{
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IDX=$1
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LOC=$2
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REM=$3
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echo "Running $IDX tests on: $(basename $LOC) / $(basename $REM)"
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write_mw "$LOC/$IDX"
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split_remote "$LOC/$IDX"
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if [[ "$REMOTE" == "" ]]; then
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A=$VPATH
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else
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A=/tmp/ntb_test.$$.A
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ssh "$REMOTE" cat "$VPATH" > "$A"
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fi
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split_remote "$REM/peer_$IDX"
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if [[ "$REMOTE" == "" ]]; then
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B=$VPATH
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else
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B=/tmp/ntb_test.$$.B
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ssh "$REMOTE" cat "$VPATH" > "$B"
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fi
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cmp -n $MW_SIZE "$A" "$B"
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if [[ $? != 0 ]]; then
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echo "Memory window $MW did not match!" >&2
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fi
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if [[ "$A" == "/tmp/*" ]]; then
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rm "$A"
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fi
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if [[ "$B" == "/tmp/*" ]]; then
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rm "$B"
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fi
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echo " Passed"
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}
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function pingpong_test()
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{
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LOC=$1
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REM=$2
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echo "Running ping pong tests on: $(basename $LOC) / $(basename $REM)"
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LOC_START=$(read_file $LOC/count)
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REM_START=$(read_file $REM/count)
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sleep 7
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LOC_END=$(read_file $LOC/count)
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REM_END=$(read_file $REM/count)
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if [[ $LOC_START == $LOC_END ]] || [[ $REM_START == $REM_END ]]; then
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echo "Ping pong counter not incrementing!" >&2
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exit 1
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fi
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echo " Passed"
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}
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function perf_test()
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{
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USE_DMA=$1
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if [[ $USE_DMA == "1" ]]; then
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WITH="with"
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else
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WITH="without"
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fi
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_modprobe ntb_perf run_order=$PERF_RUN_ORDER \
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max_mw_size=$MAX_MW_SIZE use_dma=$USE_DMA
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echo "Running local perf test $WITH DMA"
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write_file "" $LOCAL_PERF/run
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echo -n " "
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read_file $LOCAL_PERF/run
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echo " Passed"
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echo "Running remote perf test $WITH DMA"
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write_file "" $REMOTE_PERF/run
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echo -n " "
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read_file $LOCAL_PERF/run
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echo " Passed"
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_modprobe -r ntb_perf
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}
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function ntb_tool_tests()
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{
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LOCAL_TOOL=$DEBUGFS/ntb_tool/$LOCAL_DEV
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REMOTE_TOOL=$REMOTE_HOST:$DEBUGFS/ntb_tool/$REMOTE_DEV
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echo "Starting ntb_tool tests..."
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_modprobe ntb_tool
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write_file Y $LOCAL_TOOL/link_event
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write_file Y $REMOTE_TOOL/link_event
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link_test $LOCAL_TOOL $REMOTE_TOOL
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link_test $REMOTE_TOOL $LOCAL_TOOL
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for PEER_TRANS in $(ls $LOCAL_TOOL/peer_trans*); do
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PT=$(basename $PEER_TRANS)
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write_file $MW_SIZE $LOCAL_TOOL/$PT
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write_file $MW_SIZE $REMOTE_TOOL/$PT
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done
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doorbell_test $LOCAL_TOOL $REMOTE_TOOL
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doorbell_test $REMOTE_TOOL $LOCAL_TOOL
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scratchpad_test $LOCAL_TOOL $REMOTE_TOOL
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scratchpad_test $REMOTE_TOOL $LOCAL_TOOL
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for MW in $(ls $LOCAL_TOOL/mw*); do
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MW=$(basename $MW)
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mw_test $MW $LOCAL_TOOL $REMOTE_TOOL
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mw_test $MW $REMOTE_TOOL $LOCAL_TOOL
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done
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_modprobe -r ntb_tool
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}
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function ntb_pingpong_tests()
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{
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LOCAL_PP=$DEBUGFS/ntb_pingpong/$LOCAL_DEV
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REMOTE_PP=$REMOTE_HOST:$DEBUGFS/ntb_pingpong/$REMOTE_DEV
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echo "Starting ntb_pingpong tests..."
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_modprobe ntb_pingpong
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pingpong_test $LOCAL_PP $REMOTE_PP
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_modprobe -r ntb_pingpong
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}
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function ntb_perf_tests()
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{
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LOCAL_PERF=$DEBUGFS/ntb_perf/$LOCAL_DEV
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REMOTE_PERF=$REMOTE_HOST:$DEBUGFS/ntb_perf/$REMOTE_DEV
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echo "Starting ntb_perf tests..."
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perf_test 0
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if [[ $RUN_DMA_TESTS ]]; then
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perf_test 1
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fi
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}
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function cleanup()
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{
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set +e
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_modprobe -r ntb_tool 2> /dev/null
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_modprobe -r ntb_perf 2> /dev/null
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_modprobe -r ntb_pingpong 2> /dev/null
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_modprobe -r ntb_transport 2> /dev/null
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set -e
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}
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cleanup
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if ! [[ $$DONT_CLEANUP ]]; then
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trap cleanup EXIT
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fi
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if [ "$(id -u)" != "0" ]; then
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echo "This script must be run as root" 1>&2
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exit 1
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fi
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if [[ "$LIST_DEVS" == TRUE ]]; then
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echo "Local Devices:"
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ls -1 /sys/bus/ntb/devices
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echo
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if [[ "$REMOTE_HOST" != "" ]]; then
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echo "Remote Devices:"
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ssh $REMOTE_HOST ls -1 /sys/bus/ntb/devices
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fi
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exit 0
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fi
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if [[ "$LOCAL_DEV" == $"" ]] || [[ "$REMOTE_DEV" == $"" ]]; then
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show_help
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exit 1
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fi
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ntb_tool_tests
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echo
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ntb_pingpong_tests
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echo
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ntb_perf_tests
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echo
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