From patchwork Thu May 16 09:32:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 797377 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 60826144D21; Thu, 16 May 2024 09:34:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715852059; cv=none; b=nD3hUz5yw9kBcROKSMl+4TZCBjbFgjHT6auXm29FIcmJ1OwWvG9K21xRPj4qcnaOm69UHmaV5Q2p923y0kGHaqlj5WXVdTJjtj0Q2FOiuGJA6Jh28SgIUyISsrN7GNUtSkWEExSdv1Ow+LkhGJ8inf01oreyTfOjDVrg+3Iexqw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715852059; c=relaxed/simple; bh=z1bEIZI1MNH9EenT73hgXO8ZkeN9edr3Kn7/hFxax9s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=jHxUgiMTZKui6/Y4mn2uK1TSyPFzw6OyRQ4jCIabVoc9OScXE2E2egzwkKkhWN8lJyhDv1V9dAMV8vdcqEdLbPnU6fCnxuGbzxETRUqWPFY4WAo3nmZG17ZHINZq2xNQCmvNGvJbJOYtSQ3Ruf52lbek5fe3pLglRC3GFXQ9VJQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=WwKTJGvM; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="WwKTJGvM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715852058; x=1747388058; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=z1bEIZI1MNH9EenT73hgXO8ZkeN9edr3Kn7/hFxax9s=; b=WwKTJGvMoaUzp5sPvSHn5q9a0y7KZngHUGw7Q/nrIq8SGlv7nza46Dbz yvIfsemrHUWje8//c23juv1aSa/neS7t0w3jr3zZct+aTsgEfu5MeqpI2 rpxOcYk5bXvhlRJVMtb5LqkYDF7x9A1XkrDPoHL30BMCGXRfY7ZXcUseC GKQrIavVjxwkf8+ScaMV//jSwRTavTGHK3yJQWEp+7IQwtJJVtUQUMwMe Du59dridf3ba9iQpbxQQgV1K7RRK94DRZX83zlp2GhQXXvPu/jYAMkwjA WQR4mW3S1ZjyUr4Yr3nhkoQWzteskEKXDvABAal72Bx6OezjDGeosjE2/ A==; X-CSE-ConnectionGUID: KtqkfFNXScKEi1l3TUWgGQ== X-CSE-MsgGUID: FlRa8US+SQ+qF3IsKyCC7g== X-IronPort-AV: E=McAfee;i="6600,9927,11074"; a="23355097" X-IronPort-AV: E=Sophos;i="6.08,164,1712646000"; d="scan'208";a="23355097" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2024 02:34:17 -0700 X-CSE-ConnectionGUID: cgN1CT//SLyjTRQzX4ZGLg== X-CSE-MsgGUID: P/22DOGFQF6FiIs41t5lyg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,164,1712646000"; d="scan'208";a="31372510" Received: from ijarvine-desk1.ger.corp.intel.com (HELO localhost) ([10.245.247.108]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2024 02:34:12 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: linux-pci@vger.kernel.org, Bjorn Helgaas , Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , "Maciej W . Rozycki" , Jonathan Cameron , Lukas Wunner , Alexandru Gagniuc , Krishna chaitanya chundru , Srinivas Pandruvada , "Rafael J. Wysocki" , linux-pm@vger.kernel.org, Shuah Khan , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Daniel Lezcano , Amit Kucheria , Zhang Rui , Christophe JAILLET Subject: [PATCH v6 8/8] selftests/pcie_bwctrl: Create selftests Date: Thu, 16 May 2024 12:32:22 +0300 Message-Id: <20240516093222.1684-9-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240516093222.1684-1-ilpo.jarvinen@linux.intel.com> References: <20240516093222.1684-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Create selftests for PCIe BW control through the PCIe cooling device sysfs interface. First, the BW control selftest finds the PCIe Port to test with. By default, the PCIe Port with the highest Link Speed is selected but another PCIe Port can be provided with -d parameter. The actual test steps the cur_state of the cooling device one-by-one from max_state to what the cur_state was initially. The speed change is confirmed by observing the current_link_speed for the corresponding PCIe Port. Signed-off-by: Ilpo Järvinen --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/pcie_bwctrl/Makefile | 2 + .../pcie_bwctrl/set_pcie_cooling_state.sh | 122 ++++++++++++++++++ .../selftests/pcie_bwctrl/set_pcie_speed.sh | 67 ++++++++++ 5 files changed, 193 insertions(+) create mode 100644 tools/testing/selftests/pcie_bwctrl/Makefile create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh diff --git a/MAINTAINERS b/MAINTAINERS index 3a94ae81b13f..5a3b69515256 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17106,6 +17106,7 @@ S: Supported F: drivers/pci/pcie/bwctrl.c F: drivers/thermal/pcie_cooling.c F: include/linux/pci-bwctrl.h +F: tools/testing/selftests/pcie_bwctrl/ PCIE DRIVER FOR AMAZON ANNAPURNA LABS M: Jonathan Chocron diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index e1504833654d..ac0bc8af4123 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -65,6 +65,7 @@ TARGETS += net/openvswitch TARGETS += net/tcp_ao TARGETS += netfilter TARGETS += nsfs +TARGETS += pcie_bwctrl TARGETS += perf_events TARGETS += pidfd TARGETS += pid_namespace diff --git a/tools/testing/selftests/pcie_bwctrl/Makefile b/tools/testing/selftests/pcie_bwctrl/Makefile new file mode 100644 index 000000000000..3e84e26341d1 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/Makefile @@ -0,0 +1,2 @@ +TEST_PROGS = set_pcie_cooling_state.sh +include ../lib.mk diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh new file mode 100755 index 000000000000..9df606552af3 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh @@ -0,0 +1,122 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +SYSFS= +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 +skipmsg="skip all tests:" + +PCIEPORTTYPE="PCIe_Port_Link_Speed" + +prerequisite() +{ + local ports + + if [ $UID != 0 ]; then + echo $skipmsg must be run as root >&2 + exit $ksft_skip + fi + + SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` + + if [ ! -d "$SYSFS" ]; then + echo $skipmsg sysfs is not mounted >&2 + exit $ksft_skip + fi + + if ! ls $SYSFS/class/thermal/cooling_device* > /dev/null 2>&1; then + echo $skipmsg thermal cooling devices missing >&2 + exit $ksft_skip + fi + + ports=`grep -e "^$PCIEPORTTYPE" $SYSFS/class/thermal/cooling_device*/type | wc -l` + if [ $ports -eq 0 ]; then + echo $skipmsg pcie cooling devices missing >&2 + exit $ksft_skip + fi +} + +testport= +find_pcie_port() +{ + local patt="$1" + local pcieports + local max + local cur + local delta + local bestdelta=-1 + + pcieports=`grep -l -F -e "$patt" /sys/class/thermal/cooling_device*/type` + if [ -z "$pcieports" ]; then + return + fi + pcieports=${pcieports//\/type/} + # Find the port with the highest PCIe Link Speed + for port in $pcieports; do + max=`cat $port/max_state` + cur=`cat $port/cur_state` + delta=$((max-cur)) + if [ $delta -gt $bestdelta ]; then + testport="$port" + bestdelta=$delta + fi + done +} + +sysfspcidev= +find_sysfs_pci_dev() +{ + local typefile="$1/type" + local pcidir + + pcidir="$SYSFS/bus/pci/devices/`sed -e "s|^${PCIEPORTTYPE}_||g" $typefile`" + + if [ -r "$pcidir/current_link_speed" ]; then + sysfspcidev="$pcidir/current_link_speed" + fi +} + +usage() +{ + echo "Usage $0 [ -d dev ]" + echo -e "\t-d: PCIe port BDF string (e.g., 0000:00:04.0)" +} + +pattern="$PCIEPORTTYPE" +parse_arguments() +{ + while getopts d:h opt; do + case $opt in + h) + usage "$0" + exit 0 + ;; + d) + pattern="$PCIEPORTTYPE_$OPTARG" + ;; + *) + usage "$0" + exit 0 + ;; + esac + done +} + +parse_arguments "$@" +prerequisite +find_pcie_port "$pattern" +if [ -z "$testport" ]; then + echo $skipmsg "pcie cooling device not found from sysfs" >&2 + exit $ksft_skip +fi +find_sysfs_pci_dev "$testport" +if [ -z "$sysfspcidev" ]; then + echo $skipmsg "PCIe port device not found from sysfs" >&2 + exit $ksft_skip +fi + +./set_pcie_speed.sh "$testport" "$sysfspcidev" +retval=$? + +exit $retval diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh new file mode 100755 index 000000000000..584596949312 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh @@ -0,0 +1,67 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +set -e + +TESTNAME=set_pcie_speed + +declare -a PCIELINKSPEED=( + "2.5 GT/s PCIe" + "5.0 GT/s PCIe" + "8.0 GT/s PCIe" + "16.0 GT/s PCIe" + "32.0 GT/s PCIe" + "64.0 GT/s PCIe" +) + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 + +coolingdev="$1" +statefile="$coolingdev/cur_state" +maxfile="$coolingdev/max_state" +linkspeedfile="$2" + +oldstate=`cat $statefile` +maxstate=`cat $maxfile` + +set_state() +{ + local state=$1 + local linkspeed + local expected_linkspeed + + echo $state > $statefile + + sleep 1 + + linkspeed="`cat $linkspeedfile`" + expected_linkspeed=$((maxstate-state)) + expected_str="${PCIELINKSPEED[$expected_linkspeed]}" + if [ ! "${expected_str}" = "${linkspeed}" ]; then + echo "$TESTNAME failed: expected: ${expected_str}; got ${linkspeed}" + retval=1 + fi +} + +cleanup_skip () +{ + set_state $oldstate + exit $ksft_skip +} + +trap cleanup_skip EXIT + +echo "$TESTNAME: testing states $maxstate .. $oldstate with $coolingdev" +for i in $(seq $maxstate -1 $oldstate); do + set_state "$i" +done + +trap EXIT +if [ $retval -eq 0 ]; then + echo "$TESTNAME [PASS]" +else + echo "$TESTNAME [FAIL]" +fi +exit $retval