Commit a9c59ef7 authored by Logan Gunthorpe's avatar Logan Gunthorpe Committed by Jon Mason

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: default avatarLogan Gunthorpe <logang@deltatee.com>
Acked-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
Acked-by: default avatarAllen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: default avatarJon Mason <jdmason@kudzu.us>
parent 35539b54
......@@ -8131,6 +8131,7 @@ 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>
......
#!/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
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