From patchwork Tue Dec 7 09:34:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 12661399 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99D12C433F5 for ; Tue, 7 Dec 2021 09:34:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233952AbhLGJiB (ORCPT ); Tue, 7 Dec 2021 04:38:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234017AbhLGJhy (ORCPT ); Tue, 7 Dec 2021 04:37:54 -0500 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4D23C061746 for ; Tue, 7 Dec 2021 01:34:23 -0800 (PST) Received: by mail-wr1-x42b.google.com with SMTP id q3so28140948wru.5 for ; Tue, 07 Dec 2021 01:34:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=E72nks27R+FTfv7Xo66RHLQTl4ZrJaRM3vx6caSIRwg=; b=uv/cvt37HsyxzldEusNsjncNqDytvuV2ySuIFgB5WBwnv9YnUzLBAKsfKxSHczM1RN Sf1G4LVipcKMhG9uNj8zistz8iLWlGbAdRgSuc7NibztEc8DPw/9XjRgLGgHkv6DATWK TIEUCPi7eLBprYxvY1NdUCIRWNjIoDUTFH6S/Jp8odM46ab5u+OtxtLV5ZAg5ifBlE0H a6mQLN0n4ucXJxICxn2Yg40r/0H8fOgeXDUL5wYgg+PvVchs1ZzVYXpNNe8pn/hog/Vd DzpU/i1rKElgpt6ZvDkYzyEA/c/3VI+HqUCBCvCQ+dh1yhLhcRVOPJDIGh4owJmlGnWl e2kw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=E72nks27R+FTfv7Xo66RHLQTl4ZrJaRM3vx6caSIRwg=; b=pXZEfhmhc19u+czXq/GaOyYyUWdGDT8nnoRr0plQ6T9ZYDqd4Wzsd7NZB6nsKCRD/q lgGYMsIpbjur3MEwmk2uaRFVD0rgUTNPqR0i7Zv/A6FQ9DffVPMZhKBzsF9YTx1oC+0U 0kMH0kBx5eJvOUXREr2R08PXb/FHKJzCKkr+D3ve9xz23rADrwtldYDTgE9c69MRw+kX uQ5Sirp3ccGTj/g1su6C264zyOxpeIDKfuItYBslCTaAW4AimHRqiQSO1h5rsH3LuF1K 5PKa0FrzAVb3ku/FsPPDayaMKHcho93/R7uHr0CTxGm0RtbwVnnHVyZf5KgfHYUqUCqZ vztA== X-Gm-Message-State: AOAM530OuavKvbbUohCzvy7bZkyVGXio7zUc3JYa8a/NTORz4YVnWyB2 IP8/AgzR3rMoLgKNmj6mzACzKg== X-Google-Smtp-Source: ABdhPJx6FqieUGR4OKaLwDWIr29KvIkWXw6PfK6KawoEmnO5O4GpMH2E+ivDvotGmputmv1RFPfzqw== X-Received: by 2002:a5d:6449:: with SMTP id d9mr50149845wrw.332.1638869662270; Tue, 07 Dec 2021 01:34:22 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:334:ac00:7d50:ff5:f5c1:e225]) by smtp.gmail.com with ESMTPSA id k13sm13783291wri.6.2021.12.07.01.34.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Dec 2021 01:34:21 -0800 (PST) From: Bartosz Golaszewski To: Kent Gibson , Linus Walleij , Andy Shevchenko , Shuah Khan , Geert Uytterhoeven , Viresh Kumar Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v13 7/7] selftests: gpio: add test cases for gpio-sim Date: Tue, 7 Dec 2021 10:34:12 +0100 Message-Id: <20211207093412.27833-8-brgl@bgdev.pl> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20211207093412.27833-1-brgl@bgdev.pl> References: <20211207093412.27833-1-brgl@bgdev.pl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add a set of tests for the new gpio-sim module. This is a pure shell test-suite and uses the helper programs available in the gpio selftests directory. These test-cases only test the functionalities exposed by the gpio-sim driver, not those handled by core gpiolib code. Signed-off-by: Bartosz Golaszewski --- tools/testing/selftests/gpio/Makefile | 2 +- tools/testing/selftests/gpio/config | 1 + tools/testing/selftests/gpio/gpio-sim.sh | 396 +++++++++++++++++++++++ 3 files changed, 398 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/gpio/gpio-sim.sh diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile index 293aa9749408..71b306602368 100644 --- a/tools/testing/selftests/gpio/Makefile +++ b/tools/testing/selftests/gpio/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 -TEST_PROGS := gpio-mockup.sh +TEST_PROGS := gpio-mockup.sh gpio-sim.sh TEST_FILES := gpio-mockup-sysfs.sh TEST_GEN_PROGS_EXTENDED := gpio-mockup-cdev gpio-chip-info gpio-line-name CFLAGS += -O2 -g -Wall -I../../../../usr/include/ diff --git a/tools/testing/selftests/gpio/config b/tools/testing/selftests/gpio/config index ce100342c20b..409a8532facc 100644 --- a/tools/testing/selftests/gpio/config +++ b/tools/testing/selftests/gpio/config @@ -1,3 +1,4 @@ CONFIG_GPIOLIB=y CONFIG_GPIO_CDEV=y CONFIG_GPIO_MOCKUP=m +CONFIG_GPIO_SIM=m diff --git a/tools/testing/selftests/gpio/gpio-sim.sh b/tools/testing/selftests/gpio/gpio-sim.sh new file mode 100755 index 000000000000..d335a975890c --- /dev/null +++ b/tools/testing/selftests/gpio/gpio-sim.sh @@ -0,0 +1,396 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2021 Bartosz Golaszewski + +BASE_DIR=`dirname $0` +CONFIGFS_DIR="/sys/kernel/config/gpio-sim" +MODULE="gpio-sim" + +fail() { + echo "$*" >&2 + echo "GPIO $MODULE test FAIL" + exit 1 +} + +skip() { + echo "$*" >&2 + echo "GPIO $MODULE test SKIP" + exit 4 +} + +remove_chip() { + local CHIP=$1 + + for FILE in $CONFIGFS_DIR/$CHIP/*; do + BANK=`basename $FILE` + if [ "$BANK" == "live" ] || [ "$BANK" == "dev_name" ]; then + continue + fi + + LINES=`ls $CONFIGFS_DIR/$CHIP/$BANK/ | egrep ^line` + if [ "$?" == 0 ]; then + for LINE in $LINES; do + if [ -e $CONFIGFS_DIR/$CHIP/$BANK/$LINE/hog ]; then + rmdir $CONFIGFS_DIR/$CHIP/$BANK/$LINE/hog || \ + fail "Unable to remove the hog" + fi + + rmdir $CONFIGFS_DIR/$CHIP/$BANK/$LINE || \ + fail "Unable to remove the line" + done + fi + + rmdir $CONFIGFS_DIR/$CHIP/$BANK + done + + rmdir $CONFIGFS_DIR/$CHIP || fail "Unable to remove the chip" +} + +configfs_cleanup() { + for CHIP in `ls $CONFIGFS_DIR/`; do + remove_chip $CHIP + done +} + +create_chip() { + local CHIP=$1 + + mkdir $CONFIGFS_DIR/$CHIP +} + +create_bank() { + local CHIP=$1 + local BANK=$2 + + mkdir $CONFIGFS_DIR/$CHIP/$BANK +} + +set_label() { + local CHIP=$1 + local BANK=$2 + local LABEL=$3 + + echo $LABEL > $CONFIGFS_DIR/$CHIP/$BANK/label || fail "Unable to set the chip label" +} + +set_num_lines() { + local CHIP=$1 + local BANK=$2 + local NUM_LINES=$3 + + echo $NUM_LINES > $CONFIGFS_DIR/$CHIP/$BANK/num_lines || \ + fail "Unable to set the number of lines" +} + +set_line_name() { + local CHIP=$1 + local BANK=$2 + local OFFSET=$3 + local NAME=$4 + local LINE_DIR=$CONFIGFS_DIR/$CHIP/$BANK/line$OFFSET + + test -d $LINE_DIR || mkdir $LINE_DIR + echo $NAME > $LINE_DIR/name || fail "Unable to set the line name" +} + +enable_chip() { + local CHIP=$1 + + echo 1 > $CONFIGFS_DIR/$CHIP/live || fail "Unable to enable the chip" +} + +disable_chip() { + local CHIP=$1 + + echo 0 > $CONFIGFS_DIR/$CHIP/live || fail "Unable to disable the chip" +} + +configfs_chip_name() { + local CHIP=$1 + local BANK=$2 + + cat $CONFIGFS_DIR/$CHIP/$BANK/chip_name 2> /dev/null || \ + fail "unable to read the chip name from configfs" +} + +configfs_dev_name() { + local CHIP=$1 + + cat $CONFIGFS_DIR/$CHIP/dev_name 2> /dev/null || \ + fail "unable to read the device name from configfs" +} + +get_chip_num_lines() { + local CHIP=$1 + local BANK=$2 + + $BASE_DIR/gpio-chip-info /dev/`configfs_chip_name $CHIP $BANK` num-lines || \ + fail "unable to read the number of lines from the character device" +} + +get_chip_label() { + local CHIP=$1 + local BANK=$2 + + $BASE_DIR/gpio-chip-info /dev/`configfs_chip_name $CHIP $BANK` label || \ + fail "unable to read the chip label from the character device" +} + +get_line_name() { + local CHIP=$1 + local BANK=$2 + local OFFSET=$3 + + $BASE_DIR/gpio-line-name /dev/`configfs_chip_name $CHIP $BANK` $OFFSET || \ + fail "unable to read the line name from the character device" +} + +sysfs_set_pull() { + local DEV=$1 + local BANK=$2 + local OFFSET=$3 + local PULL=$4 + local DEVNAME=`configfs_dev_name $DEV` + local CHIPNAME=`configfs_chip_name $DEV $BANK` + local SYSFSPATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio$OFFSET/pull" + + echo $PULL > $SYSFSPATH || fail "Unable to set line pull in sysfs" +} + +# Load the gpio-sim module. This will pull in configfs if needed too. +modprobe gpio-sim || skip "unable to load the gpio-sim module" +# Make sure configfs is mounted at /sys/kernel/config. Wait a bit if needed. +for IDX in `seq 5`; do + if [ "$IDX" -eq "5" ]; then + skip "configfs not mounted at /sys/kernel/config" + fi + + mountpoint -q /sys/kernel/config && break + sleep 0.1 +done +# If the module was already loaded: remove all previous chips +configfs_cleanup + +trap "exit 1" SIGTERM SIGINT +trap configfs_cleanup EXIT + +echo "1. chip_name and dev_name attributes" + +echo "1.1. Chip name is communicated to user" +create_chip chip +create_bank chip bank +enable_chip chip +test -n `cat $CONFIGFS_DIR/chip/bank/chip_name` || fail "chip_name doesn't work" +remove_chip chip + +echo "1.2. chip_name returns 'none' if the chip is still pending" +create_chip chip +create_bank chip bank +test "`cat $CONFIGFS_DIR/chip/bank/chip_name`" = "none" || \ + fail "chip_name doesn't return 'none' for a pending chip" +remove_chip chip + +echo "1.3. Device name is communicated to user" +create_chip chip +create_bank chip bank +enable_chip chip +test -n `cat $CONFIGFS_DIR/chip/dev_name` || fail "dev_name doesn't work" +remove_chip chip + +echo "2. Creating and configuring simulated chips" + +echo "2.1. Default number of lines is 1" +create_chip chip +create_bank chip bank +enable_chip chip +test "`get_chip_num_lines chip bank`" = "1" || fail "default number of lines is not 1" +remove_chip chip + +echo "2.2. Number of lines can be specified" +create_chip chip +create_bank chip bank +set_num_lines chip bank 16 +enable_chip chip +test "`get_chip_num_lines chip bank`" = "16" || fail "number of lines is not 16" +remove_chip chip + +echo "2.3. Label can be set" +create_chip chip +create_bank chip bank +set_label chip bank foobar +enable_chip chip +test "`get_chip_label chip bank`" = "foobar" || fail "label is incorrect" +remove_chip chip + +echo "2.4. Label can be left empty" +create_chip chip +create_bank chip bank +enable_chip chip +test -z "`cat $CONFIGFS_DIR/chip/bank/label`" || fail "label is not empty" +remove_chip chip + +echo "2.5. Line names can be configured" +create_chip chip +create_bank chip bank +set_num_lines chip bank 16 +set_line_name chip bank 0 foo +set_line_name chip bank 2 bar +enable_chip chip +test "`get_line_name chip bank 0`" = "foo" || fail "line name is incorrect" +test "`get_line_name chip bank 2`" = "bar" || fail "line name is incorrect" +remove_chip chip + +echo "2.6. Line config can remain unused if offset is greater than number of lines" +create_chip chip +create_bank chip bank +set_num_lines chip bank 2 +set_line_name chip bank 5 foobar +enable_chip chip +test "`get_line_name chip bank 0`" = "" || fail "line name is incorrect" +test "`get_line_name chip bank 1`" = "" || fail "line name is incorrect" +remove_chip chip + +echo "2.7. Line configfs directory names are sanitized" +create_chip chip +create_bank chip bank +mkdir $CONFIGFS_DIR/chip/bank/line12foobar 2> /dev/null && \ + fail "invalid configfs line name accepted" +mkdir $CONFIGFS_DIR/chip/bank/line_no_offset 2> /dev/null && \ + fail "invalid configfs line name accepted" +remove_chip chip + +echo "2.8. Multiple chips can be created" +CHIPS="chip0 chip1 chip2" +for CHIP in $CHIPS; do + create_chip $CHIP + create_bank $CHIP bank + enable_chip $CHIP +done +for CHIP in $CHIPS; do + remove_chip $CHIP +done + +echo "2.9. Can't modify settings when chip is live" +create_chip chip +create_bank chip bank +enable_chip chip +echo foobar > $CONFIGFS_DIR/chip/bank/label 2> /dev/null && \ + fail "Setting label of a live chip should fail" +echo 8 > $CONFIGFS_DIR/chip/bank/num_lines 2> /dev/null && \ + fail "Setting number of lines of a live chip should fail" +remove_chip chip + +echo "2.10. Can't create line items when chip is live" +create_chip chip +create_bank chip bank +enable_chip chip +mkdir $CONFIGFS_DIR/chip/bank/line0 2> /dev/null && fail "Creating line item should fail" +remove_chip chip + +echo "2.11. Probe errors are propagated to user-space" +create_chip chip +create_bank chip bank +set_num_lines chip bank 99999 +echo 1 > $CONFIGFS_DIR/chip/live 2> /dev/null && fail "Probe error was not propagated" +remove_chip chip + +echo "2.12. Cannot enable a chip without any GPIO banks" +create_chip chip +echo 1 > $CONFIGFS_DIR/chip/live 2> /dev/null && fail "Chip enabled without any GPIO banks" +remove_chip chip + +echo "2.13. Duplicate chip labels are not allowed" +create_chip chip +create_bank chip bank0 +set_label chip bank0 foobar +create_bank chip bank1 +set_label chip bank1 foobar +echo 1 > $CONFIGFS_DIR/chip/live 2> /dev/null && fail "Duplicate chip labels were not rejected" +remove_chip chip + +echo "2.14. Lines can be hogged" +create_chip chip +create_bank chip bank +set_num_lines chip bank 8 +mkdir -p $CONFIGFS_DIR/chip/bank/line4/hog +enable_chip chip +$BASE_DIR/gpio-mockup-cdev -s 1 /dev/`configfs_chip_name chip bank` 4 2> /dev/null && \ + fail "Setting the value of a hogged line shouldn't succeed" +remove_chip chip + +echo "3. Controlling simulated chips" + +echo "3.1. Pull can be set over sysfs" +create_chip chip +create_bank chip bank +set_num_lines chip bank 8 +enable_chip chip +sysfs_set_pull chip bank 0 pull-up +$BASE_DIR/gpio-mockup-cdev /dev/`configfs_chip_name chip bank` 0 +test "$?" = "1" || fail "pull set incorrectly" +sysfs_set_pull chip bank 0 pull-down +$BASE_DIR/gpio-mockup-cdev /dev/`configfs_chip_name chip bank` 1 +test "$?" = "0" || fail "pull set incorrectly" +remove_chip chip + +echo "3.2. Pull can be read from sysfs" +create_chip chip +create_bank chip bank +set_num_lines chip bank 8 +enable_chip chip +DEVNAME=`configfs_dev_name chip` +CHIPNAME=`configfs_chip_name chip bank` +SYSFS_PATH=/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio0/pull +test `cat $SYSFS_PATH` = "pull-down" || fail "reading the pull failed" +sysfs_set_pull chip bank 0 pull-up +test `cat $SYSFS_PATH` = "pull-up" || fail "reading the pull failed" +remove_chip chip + +echo "3.3. Incorrect input in sysfs is rejected" +create_chip chip +create_bank chip bank +set_num_lines chip bank 8 +enable_chip chip +DEVNAME=`configfs_dev_name chip` +CHIPNAME=`configfs_chip_name chip bank` +SYSFS_PATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio0/pull" +echo foobar > $SYSFS_PATH 2> /dev/null && fail "invalid input not detected" +remove_chip chip + +echo "3.4. Can't write to value" +create_chip chip +create_bank chip bank +enable_chip chip +DEVNAME=`configfs_dev_name chip` +CHIPNAME=`configfs_chip_name chip bank` +SYSFS_PATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio0/value" +echo 1 > $SYSFS_PATH 2> /dev/null && fail "writing to 'value' succeeded unexpectedly" +remove_chip chip + +echo "4. Simulated GPIO chips are functional" + +echo "4.1. Values can be read from sysfs" +create_chip chip +create_bank chip bank +set_num_lines chip bank 8 +enable_chip chip +DEVNAME=`configfs_dev_name chip` +CHIPNAME=`configfs_chip_name chip bank` +SYSFS_PATH="/sys/devices/platform/$DEVNAME/$CHIPNAME/sim_gpio0/value" +test `cat $SYSFS_PATH` = "0" || fail "incorrect value read from sysfs" +$BASE_DIR/gpio-mockup-cdev -s 1 /dev/`configfs_chip_name chip bank` 0 & +sleep 0.1 # FIXME Any better way? +test `cat $SYSFS_PATH` = "1" || fail "incorrect value read from sysfs" +kill $! +remove_chip chip + +echo "4.2. Bias settings work correctly" +create_chip chip +create_bank chip bank +set_num_lines chip bank 8 +enable_chip chip +$BASE_DIR/gpio-mockup-cdev -b pull-up /dev/`configfs_chip_name chip bank` 0 +test `cat $SYSFS_PATH` = "1" || fail "bias setting does not work" +remove_chip chip + +echo "GPIO $MODULE test PASS"