| Message ID | 1479723371-5489-1-git-send-email-bamvor.zhangjian@huawei.com |
|---|---|
| State | New |
| Headers | show |
Ping. On 2016/11/21 18:16, bamvor.zhangjian@huawei.com wrote: > From: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> > > This test script try to do whitebox testing for gpio subsystem(based on > gpiolib). It manipulate gpio device through chardev or sysfs and check > the result from debugfs. This script test gpio-mockup through chardev by > default. User could test other gpio chip by passing the module name. > Some of the testcases are turned off by default to avoid the conflicting > with gpiochip in system. > > In details, it test the following things: > 1. Test direction and output value for valid pin. > 2. Test dynamic allocation of gpio base. > 3. Add single, multi gpiochip to do overlap check. > > Run "tools/testing/selftests/gpio/gpio-mockup.sh -h" for usage. > > Acked-by: Shuah Khan <shuahkh@osg.samsung.com> > Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> > --- > Changes since v4: > 1. Install header to to linux/usr/include instead of default path > 2. Print being deprecated for sysfs ABI. > > tools/testing/selftests/Makefile | 1 + > tools/testing/selftests/gpio/Makefile | 23 ++ > tools/testing/selftests/gpio/gpio-mockup-chardev.c | 324 +++++++++++++++++++++ > tools/testing/selftests/gpio/gpio-mockup-sysfs.sh | 134 +++++++++ > tools/testing/selftests/gpio/gpio-mockup.sh | 201 +++++++++++++ > 5 files changed, 683 insertions(+) > create mode 100644 tools/testing/selftests/gpio/Makefile > create mode 100644 tools/testing/selftests/gpio/gpio-mockup-chardev.c > create mode 100755 tools/testing/selftests/gpio/gpio-mockup-sysfs.sh > create mode 100755 tools/testing/selftests/gpio/gpio-mockup.sh > > diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile > index ff9e5f2..2437dbc 100644 > --- a/tools/testing/selftests/Makefile > +++ b/tools/testing/selftests/Makefile > @@ -6,6 +6,7 @@ TARGETS += exec > TARGETS += firmware > TARGETS += ftrace > TARGETS += futex > +TARGETS += gpio > TARGETS += ipc > TARGETS += kcmp > TARGETS += lib > diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile > new file mode 100644 > index 0000000..205e4d1 > --- /dev/null > +++ b/tools/testing/selftests/gpio/Makefile > @@ -0,0 +1,23 @@ > + > +TEST_PROGS := gpio-mockup.sh > +TEST_FILES := gpio-mockup-sysfs.sh $(BINARIES) > +BINARIES := gpio-mockup-chardev > + > +include ../lib.mk > + > +all: $(BINARIES) > + > +clean: > + $(RM) $(BINARIES) > + > +CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/ > +LDLIBS += -lmount -I/usr/include/libmount > + > +$(BINARIES): ../../../gpio/gpio-utils.o ../../../../usr/include/linux/gpio.h > + > +../../../gpio/gpio-utils.o: > + make ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C ../../../gpio > + > +../../../../usr/include/linux/gpio.h: > + make -C ../../../.. headers_install INSTALL_HDR_PATH=$(shell pwd)/../../../../usr/ > + > diff --git a/tools/testing/selftests/gpio/gpio-mockup-chardev.c b/tools/testing/selftests/gpio/gpio-mockup-chardev.c > new file mode 100644 > index 0000000..667e916 > --- /dev/null > +++ b/tools/testing/selftests/gpio/gpio-mockup-chardev.c > @@ -0,0 +1,324 @@ > +/* > + * GPIO chardev test helper > + * > + * Copyright (C) 2016 Bamvor Jian Zhang > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms of the GNU General Public License version 2 as published by > + * the Free Software Foundation. > + */ > + > +#define _GNU_SOURCE > +#include <unistd.h> > +#include <stdio.h> > +#include <stdlib.h> > +#include <stdio.h> > +#include <errno.h> > +#include <string.h> > +#include <fcntl.h> > +#include <getopt.h> > +#include <sys/ioctl.h> > +#include <libmount.h> > +#include <err.h> > +#include <dirent.h> > +#include <linux/gpio.h> > +#include "../../../gpio/gpio-utils.h" > + > +#define CONSUMER "gpio-selftest" > +#define GC_NUM 10 > +enum direction { > + OUT, > + IN > +}; > + > +static int get_debugfs(char **path) > +{ > + struct libmnt_context *cxt; > + struct libmnt_table *tb; > + struct libmnt_iter *itr = NULL; > + struct libmnt_fs *fs; > + int found = 0; > + > + cxt = mnt_new_context(); > + if (!cxt) > + err(EXIT_FAILURE, "libmount context allocation failed"); > + > + itr = mnt_new_iter(MNT_ITER_FORWARD); > + if (!itr) > + err(EXIT_FAILURE, "failed to initialize libmount iterator"); > + > + if (mnt_context_get_mtab(cxt, &tb)) > + err(EXIT_FAILURE, "failed to read mtab"); > + > + while (mnt_table_next_fs(tb, itr, &fs) == 0) { > + const char *type = mnt_fs_get_fstype(fs); > + > + if (!strcmp(type, "debugfs")) { > + found = 1; > + break; > + } > + } > + if (found) > + asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); > + > + mnt_free_iter(itr); > + mnt_free_context(cxt); > + > + if (!found) > + return -1; > + > + return 0; > +} > + > +static int gpio_debugfs_get(const char *consumer, int *dir, int *value) > +{ > + char *debugfs; > + FILE *f; > + char *line = NULL; > + size_t len = 0; > + char *cur; > + int found = 0; > + > + if (get_debugfs(&debugfs) != 0) > + err(EXIT_FAILURE, "debugfs is not mounted"); > + > + f = fopen(debugfs, "r"); > + if (!f) > + err(EXIT_FAILURE, "read from gpio debugfs failed"); > + > + /* > + * gpio-2 ( |gpio-selftest ) in lo > + */ > + while (getline(&line, &len, f) != -1) { > + cur = strstr(line, consumer); > + if (cur == NULL) > + continue; > + > + cur = strchr(line, ')'); > + if (!cur) > + continue; > + > + cur += 2; > + if (!strncmp(cur, "out", 3)) { > + *dir = OUT; > + cur += 4; > + } else if (!strncmp(cur, "in", 2)) { > + *dir = IN; > + cur += 4; > + } > + > + if (!strncmp(cur, "hi", 2)) > + *value = 1; > + else if (!strncmp(cur, "lo", 2)) > + *value = 0; > + > + found = 1; > + break; > + } > + free(debugfs); > + fclose(f); > + free(line); > + > + if (!found) > + return -1; > + > + return 0; > +} > + > +static struct gpiochip_info *list_gpiochip(const char *gpiochip_name, int *ret) > +{ > + struct gpiochip_info *cinfo; > + struct gpiochip_info *current; > + const struct dirent *ent; > + DIR *dp; > + char *chrdev_name; > + int fd; > + int i = 0; > + > + cinfo = calloc(sizeof(struct gpiochip_info) * 4, GC_NUM + 1); > + if (!cinfo) > + err(EXIT_FAILURE, "gpiochip_info allocation failed"); > + > + current = cinfo; > + dp = opendir("/dev"); > + if (!dp) { > + *ret = -errno; > + goto error_out; > + } else { > + *ret = 0; > + } > + > + while (ent = readdir(dp), ent) { > + if (check_prefix(ent->d_name, "gpiochip")) { > + *ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name); > + if (*ret < 0) > + goto error_out; > + > + fd = open(chrdev_name, 0); > + if (fd == -1) { > + *ret = -errno; > + fprintf(stderr, "Failed to open %s\n", > + chrdev_name); > + goto error_close_dir; > + } > + *ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, current); > + if (*ret == -1) { > + perror("Failed to issue CHIPINFO IOCTL\n"); > + goto error_close_dir; > + } > + close(fd); > + if (strcmp(current->label, gpiochip_name) == 0 > + || check_prefix(current->label, gpiochip_name)) { > + *ret = 0; > + current++; > + i++; > + } > + } > + } > + > + if ((!*ret && i == 0) || *ret < 0) { > + free(cinfo); > + cinfo = NULL; > + } > + if (!*ret && i > 0) { > + cinfo = realloc(cinfo, sizeof(struct gpiochip_info) * 4 * i); > + *ret = i; > + } > + > +error_close_dir: > + closedir(dp); > +error_out: > + if (*ret < 0) > + err(EXIT_FAILURE, "list gpiochip failed: %s", strerror(*ret)); > + > + return cinfo; > +} > + > +int gpio_pin_test(struct gpiochip_info *cinfo, int line, int flag, int value) > +{ > + struct gpiohandle_data data; > + unsigned int lines[] = {line}; > + int fd; > + int debugfs_dir = IN; > + int debugfs_value = 0; > + int ret; > + > + data.values[0] = value; > + ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data, > + CONSUMER); > + if (ret < 0) > + goto fail_out; > + else > + fd = ret; > + > + ret = gpio_debugfs_get(CONSUMER, &debugfs_dir, &debugfs_value); > + if (ret) { > + ret = -EINVAL; > + goto fail_out; > + } > + if (flag & GPIOHANDLE_REQUEST_INPUT) { > + if (debugfs_dir != IN) { > + errno = -EINVAL; > + ret = -errno; > + } > + } else if (flag & GPIOHANDLE_REQUEST_OUTPUT) { > + if (flag & GPIOHANDLE_REQUEST_ACTIVE_LOW) > + debugfs_value = !debugfs_value; > + > + if (!(debugfs_dir == OUT && value == debugfs_value)) > + errno = -EINVAL; > + ret = -errno; > + > + } > + gpiotools_release_linehandle(fd); > + > +fail_out: > + if (ret) > + err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>", > + cinfo->name, line, flag, value); > + > + return ret; > +} > + > +void gpio_pin_tests(struct gpiochip_info *cinfo, unsigned int line) > +{ > + printf("line<%d>", line); > + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 0); > + printf("."); > + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 1); > + printf("."); > + gpio_pin_test(cinfo, line, > + GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, > + 0); > + printf("."); > + gpio_pin_test(cinfo, line, > + GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, > + 1); > + printf("."); > + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_INPUT, 0); > + printf("."); > +} > + > +/* > + * ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip > + * Return 0 if successful or exit with EXIT_FAILURE if test failed. > + * gpio_chip_name_prefix: The prefix of gpiochip you want to test. E.g. > + * gpio-mockup > + * is_valid_gpio_chip: Whether the gpio_chip is valid. 1 means valid, > + * 0 means invalid which could not be found by > + * list_gpiochip. > + */ > +int main(int argc, char *argv[]) > +{ > + char *prefix; > + int valid; > + struct gpiochip_info *cinfo; > + struct gpiochip_info *current; > + int i; > + int ret; > + > + if (argc < 3) { > + printf("Usage: %s prefix is_valid", argv[0]); > + exit(EXIT_FAILURE); > + } > + > + prefix = argv[1]; > + valid = strcmp(argv[2], "true") == 0 ? 1 : 0; > + > + printf("Test gpiochip %s: ", prefix); > + cinfo = list_gpiochip(prefix, &ret); > + if (!cinfo) { > + if (!valid && ret == 0) { > + printf("Invalid test successful\n"); > + ret = 0; > + goto out; > + } else { > + ret = -EINVAL; > + goto out; > + } > + } else if (cinfo && !valid) { > + ret = -EINVAL; > + goto out; > + } > + current = cinfo; > + for (i = 0; i < ret; i++) { > + gpio_pin_tests(current, 0); > + gpio_pin_tests(current, current->lines - 1); > + gpio_pin_tests(current, random() % current->lines); > + current++; > + } > + ret = 0; > + printf("successful\n"); > + > +out: > + if (ret) > + fprintf(stderr, "gpio<%s> test failed\n", prefix); > + > + if (cinfo) > + free(cinfo); > + > + if (ret) > + exit(EXIT_FAILURE); > + > + return ret; > +} > diff --git a/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh > new file mode 100755 > index 0000000..085d7a3 > --- /dev/null > +++ b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh > @@ -0,0 +1,134 @@ > + > +is_consistent() > +{ > + val= > + > + active_low_sysfs=`cat $GPIO_SYSFS/gpio$nr/active_low` > + val_sysfs=`cat $GPIO_SYSFS/gpio$nr/value` > + dir_sysfs=`cat $GPIO_SYSFS/gpio$nr/direction` > + > + gpio_this_debugfs=`cat $GPIO_DEBUGFS |grep "gpio-$nr" | sed "s/(.*)//g"` > + dir_debugfs=`echo $gpio_this_debugfs | awk '{print $2}'` > + val_debugfs=`echo $gpio_this_debugfs | awk '{print $3}'` > + if [ $val_debugfs = "lo" ]; then > + val=0 > + elif [ $val_debugfs = "hi" ]; then > + val=1 > + fi > + > + if [ $active_low_sysfs = "1" ]; then > + if [ $val = "0" ]; then > + val="1" > + else > + val="0" > + fi > + fi > + > + if [ $val_sysfs = $val ] && [ $dir_sysfs = $dir_debugfs ]; then > + echo -n "." > + else > + echo "test fail, exit" > + die > + fi > +} > + > +test_pin_logic() > +{ > + nr=$1 > + direction=$2 > + active_low=$3 > + value=$4 > + > + echo $direction > $GPIO_SYSFS/gpio$nr/direction > + echo $active_low > $GPIO_SYSFS/gpio$nr/active_low > + if [ $direction = "out" ]; then > + echo $value > $GPIO_SYSFS/gpio$nr/value > + fi > + is_consistent $nr > +} > + > +test_one_pin() > +{ > + nr=$1 > + > + echo -n "test pin<$nr>" > + > + echo $nr > $GPIO_SYSFS/export 2>/dev/null > + > + if [ X$? != X0 ]; then > + echo "test GPIO pin $nr failed" > + die > + fi > + > + #"Checking if the sysfs is consistent with debugfs: " > + is_consistent $nr > + > + #"Checking the logic of active_low: " > + test_pin_logic $nr out 1 1 > + test_pin_logic $nr out 1 0 > + test_pin_logic $nr out 0 1 > + test_pin_logic $nr out 0 0 > + > + #"Checking the logic of direction: " > + test_pin_logic $nr in 1 1 > + test_pin_logic $nr out 1 0 > + test_pin_logic $nr low 0 1 > + test_pin_logic $nr high 0 0 > + > + echo $nr > $GPIO_SYSFS/unexport > + > + echo "successful" > +} > + > +test_one_pin_fail() > +{ > + nr=$1 > + > + echo $nr > $GPIO_SYSFS/export 2>/dev/null > + > + if [ X$? != X0 ]; then > + echo "test invalid pin $nr successful" > + else > + echo "test invalid pin $nr failed" > + echo $nr > $GPIO_SYSFS/unexport 2>/dev/null > + die > + fi > +} > + > +list_chip() > +{ > + echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null` > +} > + > +test_chip() > +{ > + chip=$1 > + name=`basename $chip` > + base=`cat $chip/base` > + ngpio=`cat $chip/ngpio` > + printf "%-10s %-5s %-5s\n" $name $base $ngpio > + if [ $ngpio = "0" ]; then > + echo "number of gpio is zero is not allowed". > + fi > + test_one_pin $base > + test_one_pin $(($base + $ngpio - 1)) > + test_one_pin $((( RANDOM % $ngpio ) + $base )) > +} > + > +test_chips_sysfs() > +{ > + gpiochip=`list_chip $module` > + if [ X"$gpiochip" = X ]; then > + if [ X"$valid" = Xfalse ]; then > + echo "successful" > + else > + echo "fail" > + die > + fi > + else > + for chip in $gpiochip; do > + test_chip $chip > + done > + fi > +} > + > diff --git a/tools/testing/selftests/gpio/gpio-mockup.sh b/tools/testing/selftests/gpio/gpio-mockup.sh > new file mode 100755 > index 0000000..b183439 > --- /dev/null > +++ b/tools/testing/selftests/gpio/gpio-mockup.sh > @@ -0,0 +1,201 @@ > +#!/bin/bash > + > +#exit status > +#1: run as non-root user > +#2: sysfs/debugfs not mount > +#3: insert module fail when gpio-mockup is a module. > +#4: other reason. > + > +SYSFS= > +GPIO_SYSFS= > +GPIO_DRV_SYSFS= > +DEBUGFS= > +GPIO_DEBUGFS= > +dev_type= > +module= > + > +usage() > +{ > + echo "Usage:" > + echo "$0 [-f] [-m name] [-t type]" > + echo "-f: full test. It maybe conflict with existence gpio device." > + echo "-m: module name, default name is gpio-mockup. It could also test" > + echo " other gpio device." > + echo "-t: interface type: chardev(char device) and sysfs(being" > + echo " deprecated). The first one is default" > + echo "" > + echo "$0 -h" > + echo "This usage" > +} > + > +prerequisite() > +{ > + msg="skip all tests:" > + if [ $UID != 0 ]; then > + echo $msg must be run as root >&2 > + exit 1 > + fi > + SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` > + if [ ! -d "$SYSFS" ]; then > + echo $msg sysfs is not mounted >&2 > + exit 2 > + fi > + GPIO_SYSFS=`echo $SYSFS/class/gpio` > + GPIO_DRV_SYSFS=`echo $SYSFS/devices/platform/$module/gpio` > + DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'` > + if [ ! -d "$DEBUGFS" ]; then > + echo $msg debugfs is not mounted >&2 > + exit 2 > + fi > + GPIO_DEBUGFS=`echo $DEBUGFS/gpio` > + source gpio-mockup-sysfs.sh > +} > + > +try_insert_module() > +{ > + if [ -d "$GPIO_DRV_SYSFS" ]; then > + echo "$GPIO_DRV_SYSFS exist. Skip insert module" > + else > + modprobe -q $module $1 > + if [ X$? != X0 ]; then > + echo $msg insmod $module failed >&2 > + exit 3 > + fi > + fi > +} > + > +remove_module() > +{ > + modprobe -r -q $module > +} > + > +die() > +{ > + remove_module > + exit 4 > +} > + > +test_chips() > +{ > + if [ X$dev_type = Xsysfs ]; then > + echo "WARNING: sysfs ABI of gpio is going to deprecated." > + test_chips_sysfs $* > + else > + $BASE/gpio-mockup-chardev $* > + fi > +} > + > +gpio_test() > +{ > + param=$1 > + valid=$2 > + > + if [ X"$param" = X ]; then > + die > + fi > + try_insert_module "gpio_mockup_ranges=$param" > + echo -n "GPIO $module test with ranges: <" > + echo "$param>: " > + printf "%-10s %s\n" $param > + test_chips $module $valid > + remove_module > +} > + > +BASE=`dirname $0` > + > +dev_type= > +TEMP=`getopt -o fhm:t: -n '$0' -- "$@"` > + > +if [ "$?" != "0" ]; then > + echo "Parameter process failed, Terminating..." >&2 > + exit 1 > +fi > + > +# Note the quotes around `$TEMP': they are essential! > +eval set -- "$TEMP" > + > +while true; do > + case $1 in > + -f) > + full_test=true > + shift > + ;; > + -h) > + usage > + exit > + ;; > + -m) > + module=$2 > + shift 2 > + ;; > + -t) > + dev_type=$2 > + shift 2 > + ;; > + --) > + shift > + break > + ;; > + *) > + echo "Internal error!" > + exit 1 > + ;; > + esac > +done > + > +if [ X"$module" = X ]; then > + module="gpio-mockup" > +fi > + > +if [ X$dev_type != Xsysfs ]; then > + dev_type="chardev" > +fi > + > +prerequisite > + > +echo "1. Test dynamic allocation of gpio successful means insert gpiochip and" > +echo " manipulate gpio pin successful" > +gpio_test "-1,32" true > +gpio_test "-1,32,-1,32" true > +gpio_test "-1,32,-1,32,-1,32" true > +if [ X$full_test = Xtrue ]; then > + gpio_test "-1,32,32,64" true > + gpio_test "-1,32,40,64,-1,5" true > + gpio_test "-1,32,32,64,-1,32" true > + gpio_test "0,32,32,64,-1,32,-1,32" true > + gpio_test "-1,32,-1,32,0,32,32,64" true > + echo "2. Do basic test: successful means insert gpiochip and" > + echo " manipulate gpio pin successful" > + gpio_test "0,32" true > + gpio_test "0,32,32,64" true > + gpio_test "0,32,40,64,64,96" true > +fi > +echo "3. Error test: successful means insert gpiochip failed" > +echo "3.1 Test number of gpio overflow" > +#Currently: The max number of gpio(1024) is defined in arm architecture. > +gpio_test "-1,32,-1,1024" false > +if [ X$full_test = Xtrue ]; then > + echo "3.2 Test zero line of gpio" > + gpio_test "0,0" false > + echo "3.3 Test range overlap" > + echo "3.3.1 Test corner case" > + gpio_test "0,32,0,1" false > + gpio_test "0,32,32,64,32,40" false > + gpio_test "0,32,35,64,35,45" false > + gpio_test "0,32,31,32" false > + gpio_test "0,32,32,64,36,37" false > + gpio_test "0,32,35,64,34,36" false > + echo "3.3.2 Test inserting invalid second gpiochip" > + gpio_test "0,32,30,35" false > + gpio_test "0,32,1,5" false > + gpio_test "10,32,9,14" false > + gpio_test "10,32,30,35" false > + echo "3.3.3 Test others" > + gpio_test "0,32,40,56,39,45" false > + gpio_test "0,32,40,56,30,33" false > + gpio_test "0,32,40,56,30,41" false > + gpio_test "0,32,40,56,20,21" false > +fi > + > +echo GPIO test PASS > + > -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 12/13/2016 05:42 AM, Zhangjian (Bamvor) wrote: > Ping. > > On 2016/11/21 18:16, bamvor.zhangjian@huawei.com wrote: >> From: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> >> >> This test script try to do whitebox testing for gpio subsystem(based on >> gpiolib). It manipulate gpio device through chardev or sysfs and check >> the result from debugfs. This script test gpio-mockup through chardev by >> default. User could test other gpio chip by passing the module name. >> Some of the testcases are turned off by default to avoid the conflicting >> with gpiochip in system. >> >> In details, it test the following things: >> 1. Test direction and output value for valid pin. >> 2. Test dynamic allocation of gpio base. >> 3. Add single, multi gpiochip to do overlap check. >> >> Run "tools/testing/selftests/gpio/gpio-mockup.sh -h" for usage. >> >> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> >> Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> Hi Linus/Bemovar, It is now in linux-kselftest next for 4.10-rc1 thanks, -- Shuah >> --- >> Changes since v4: >> 1. Install header to to linux/usr/include instead of default path >> 2. Print being deprecated for sysfs ABI. >> >> tools/testing/selftests/Makefile | 1 + >> tools/testing/selftests/gpio/Makefile | 23 ++ >> tools/testing/selftests/gpio/gpio-mockup-chardev.c | 324 +++++++++++++++++++++ >> tools/testing/selftests/gpio/gpio-mockup-sysfs.sh | 134 +++++++++ >> tools/testing/selftests/gpio/gpio-mockup.sh | 201 +++++++++++++ >> 5 files changed, 683 insertions(+) >> create mode 100644 tools/testing/selftests/gpio/Makefile >> create mode 100644 tools/testing/selftests/gpio/gpio-mockup-chardev.c >> create mode 100755 tools/testing/selftests/gpio/gpio-mockup-sysfs.sh >> create mode 100755 tools/testing/selftests/gpio/gpio-mockup.sh >> >> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile >> index ff9e5f2..2437dbc 100644 >> --- a/tools/testing/selftests/Makefile >> +++ b/tools/testing/selftests/Makefile >> @@ -6,6 +6,7 @@ TARGETS += exec >> TARGETS += firmware >> TARGETS += ftrace >> TARGETS += futex >> +TARGETS += gpio >> TARGETS += ipc >> TARGETS += kcmp >> TARGETS += lib >> diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile >> new file mode 100644 >> index 0000000..205e4d1 >> --- /dev/null >> +++ b/tools/testing/selftests/gpio/Makefile >> @@ -0,0 +1,23 @@ >> + >> +TEST_PROGS := gpio-mockup.sh >> +TEST_FILES := gpio-mockup-sysfs.sh $(BINARIES) >> +BINARIES := gpio-mockup-chardev >> + >> +include ../lib.mk >> + >> +all: $(BINARIES) >> + >> +clean: >> + $(RM) $(BINARIES) >> + >> +CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/ >> +LDLIBS += -lmount -I/usr/include/libmount >> + >> +$(BINARIES): ../../../gpio/gpio-utils.o ../../../../usr/include/linux/gpio.h >> + >> +../../../gpio/gpio-utils.o: >> + make ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C ../../../gpio >> + >> +../../../../usr/include/linux/gpio.h: >> + make -C ../../../.. headers_install INSTALL_HDR_PATH=$(shell pwd)/../../../../usr/ >> + >> diff --git a/tools/testing/selftests/gpio/gpio-mockup-chardev.c b/tools/testing/selftests/gpio/gpio-mockup-chardev.c >> new file mode 100644 >> index 0000000..667e916 >> --- /dev/null >> +++ b/tools/testing/selftests/gpio/gpio-mockup-chardev.c >> @@ -0,0 +1,324 @@ >> +/* >> + * GPIO chardev test helper >> + * >> + * Copyright (C) 2016 Bamvor Jian Zhang >> + * >> + * This program is free software; you can redistribute it and/or modify it >> + * under the terms of the GNU General Public License version 2 as published by >> + * the Free Software Foundation. >> + */ >> + >> +#define _GNU_SOURCE >> +#include <unistd.h> >> +#include <stdio.h> >> +#include <stdlib.h> >> +#include <stdio.h> >> +#include <errno.h> >> +#include <string.h> >> +#include <fcntl.h> >> +#include <getopt.h> >> +#include <sys/ioctl.h> >> +#include <libmount.h> >> +#include <err.h> >> +#include <dirent.h> >> +#include <linux/gpio.h> >> +#include "../../../gpio/gpio-utils.h" >> + >> +#define CONSUMER "gpio-selftest" >> +#define GC_NUM 10 >> +enum direction { >> + OUT, >> + IN >> +}; >> + >> +static int get_debugfs(char **path) >> +{ >> + struct libmnt_context *cxt; >> + struct libmnt_table *tb; >> + struct libmnt_iter *itr = NULL; >> + struct libmnt_fs *fs; >> + int found = 0; >> + >> + cxt = mnt_new_context(); >> + if (!cxt) >> + err(EXIT_FAILURE, "libmount context allocation failed"); >> + >> + itr = mnt_new_iter(MNT_ITER_FORWARD); >> + if (!itr) >> + err(EXIT_FAILURE, "failed to initialize libmount iterator"); >> + >> + if (mnt_context_get_mtab(cxt, &tb)) >> + err(EXIT_FAILURE, "failed to read mtab"); >> + >> + while (mnt_table_next_fs(tb, itr, &fs) == 0) { >> + const char *type = mnt_fs_get_fstype(fs); >> + >> + if (!strcmp(type, "debugfs")) { >> + found = 1; >> + break; >> + } >> + } >> + if (found) >> + asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); >> + >> + mnt_free_iter(itr); >> + mnt_free_context(cxt); >> + >> + if (!found) >> + return -1; >> + >> + return 0; >> +} >> + >> +static int gpio_debugfs_get(const char *consumer, int *dir, int *value) >> +{ >> + char *debugfs; >> + FILE *f; >> + char *line = NULL; >> + size_t len = 0; >> + char *cur; >> + int found = 0; >> + >> + if (get_debugfs(&debugfs) != 0) >> + err(EXIT_FAILURE, "debugfs is not mounted"); >> + >> + f = fopen(debugfs, "r"); >> + if (!f) >> + err(EXIT_FAILURE, "read from gpio debugfs failed"); >> + >> + /* >> + * gpio-2 ( |gpio-selftest ) in lo >> + */ >> + while (getline(&line, &len, f) != -1) { >> + cur = strstr(line, consumer); >> + if (cur == NULL) >> + continue; >> + >> + cur = strchr(line, ')'); >> + if (!cur) >> + continue; >> + >> + cur += 2; >> + if (!strncmp(cur, "out", 3)) { >> + *dir = OUT; >> + cur += 4; >> + } else if (!strncmp(cur, "in", 2)) { >> + *dir = IN; >> + cur += 4; >> + } >> + >> + if (!strncmp(cur, "hi", 2)) >> + *value = 1; >> + else if (!strncmp(cur, "lo", 2)) >> + *value = 0; >> + >> + found = 1; >> + break; >> + } >> + free(debugfs); >> + fclose(f); >> + free(line); >> + >> + if (!found) >> + return -1; >> + >> + return 0; >> +} >> + >> +static struct gpiochip_info *list_gpiochip(const char *gpiochip_name, int *ret) >> +{ >> + struct gpiochip_info *cinfo; >> + struct gpiochip_info *current; >> + const struct dirent *ent; >> + DIR *dp; >> + char *chrdev_name; >> + int fd; >> + int i = 0; >> + >> + cinfo = calloc(sizeof(struct gpiochip_info) * 4, GC_NUM + 1); >> + if (!cinfo) >> + err(EXIT_FAILURE, "gpiochip_info allocation failed"); >> + >> + current = cinfo; >> + dp = opendir("/dev"); >> + if (!dp) { >> + *ret = -errno; >> + goto error_out; >> + } else { >> + *ret = 0; >> + } >> + >> + while (ent = readdir(dp), ent) { >> + if (check_prefix(ent->d_name, "gpiochip")) { >> + *ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name); >> + if (*ret < 0) >> + goto error_out; >> + >> + fd = open(chrdev_name, 0); >> + if (fd == -1) { >> + *ret = -errno; >> + fprintf(stderr, "Failed to open %s\n", >> + chrdev_name); >> + goto error_close_dir; >> + } >> + *ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, current); >> + if (*ret == -1) { >> + perror("Failed to issue CHIPINFO IOCTL\n"); >> + goto error_close_dir; >> + } >> + close(fd); >> + if (strcmp(current->label, gpiochip_name) == 0 >> + || check_prefix(current->label, gpiochip_name)) { >> + *ret = 0; >> + current++; >> + i++; >> + } >> + } >> + } >> + >> + if ((!*ret && i == 0) || *ret < 0) { >> + free(cinfo); >> + cinfo = NULL; >> + } >> + if (!*ret && i > 0) { >> + cinfo = realloc(cinfo, sizeof(struct gpiochip_info) * 4 * i); >> + *ret = i; >> + } >> + >> +error_close_dir: >> + closedir(dp); >> +error_out: >> + if (*ret < 0) >> + err(EXIT_FAILURE, "list gpiochip failed: %s", strerror(*ret)); >> + >> + return cinfo; >> +} >> + >> +int gpio_pin_test(struct gpiochip_info *cinfo, int line, int flag, int value) >> +{ >> + struct gpiohandle_data data; >> + unsigned int lines[] = {line}; >> + int fd; >> + int debugfs_dir = IN; >> + int debugfs_value = 0; >> + int ret; >> + >> + data.values[0] = value; >> + ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data, >> + CONSUMER); >> + if (ret < 0) >> + goto fail_out; >> + else >> + fd = ret; >> + >> + ret = gpio_debugfs_get(CONSUMER, &debugfs_dir, &debugfs_value); >> + if (ret) { >> + ret = -EINVAL; >> + goto fail_out; >> + } >> + if (flag & GPIOHANDLE_REQUEST_INPUT) { >> + if (debugfs_dir != IN) { >> + errno = -EINVAL; >> + ret = -errno; >> + } >> + } else if (flag & GPIOHANDLE_REQUEST_OUTPUT) { >> + if (flag & GPIOHANDLE_REQUEST_ACTIVE_LOW) >> + debugfs_value = !debugfs_value; >> + >> + if (!(debugfs_dir == OUT && value == debugfs_value)) >> + errno = -EINVAL; >> + ret = -errno; >> + >> + } >> + gpiotools_release_linehandle(fd); >> + >> +fail_out: >> + if (ret) >> + err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>", >> + cinfo->name, line, flag, value); >> + >> + return ret; >> +} >> + >> +void gpio_pin_tests(struct gpiochip_info *cinfo, unsigned int line) >> +{ >> + printf("line<%d>", line); >> + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 0); >> + printf("."); >> + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 1); >> + printf("."); >> + gpio_pin_test(cinfo, line, >> + GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, >> + 0); >> + printf("."); >> + gpio_pin_test(cinfo, line, >> + GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, >> + 1); >> + printf("."); >> + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_INPUT, 0); >> + printf("."); >> +} >> + >> +/* >> + * ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip >> + * Return 0 if successful or exit with EXIT_FAILURE if test failed. >> + * gpio_chip_name_prefix: The prefix of gpiochip you want to test. E.g. >> + * gpio-mockup >> + * is_valid_gpio_chip: Whether the gpio_chip is valid. 1 means valid, >> + * 0 means invalid which could not be found by >> + * list_gpiochip. >> + */ >> +int main(int argc, char *argv[]) >> +{ >> + char *prefix; >> + int valid; >> + struct gpiochip_info *cinfo; >> + struct gpiochip_info *current; >> + int i; >> + int ret; >> + >> + if (argc < 3) { >> + printf("Usage: %s prefix is_valid", argv[0]); >> + exit(EXIT_FAILURE); >> + } >> + >> + prefix = argv[1]; >> + valid = strcmp(argv[2], "true") == 0 ? 1 : 0; >> + >> + printf("Test gpiochip %s: ", prefix); >> + cinfo = list_gpiochip(prefix, &ret); >> + if (!cinfo) { >> + if (!valid && ret == 0) { >> + printf("Invalid test successful\n"); >> + ret = 0; >> + goto out; >> + } else { >> + ret = -EINVAL; >> + goto out; >> + } >> + } else if (cinfo && !valid) { >> + ret = -EINVAL; >> + goto out; >> + } >> + current = cinfo; >> + for (i = 0; i < ret; i++) { >> + gpio_pin_tests(current, 0); >> + gpio_pin_tests(current, current->lines - 1); >> + gpio_pin_tests(current, random() % current->lines); >> + current++; >> + } >> + ret = 0; >> + printf("successful\n"); >> + >> +out: >> + if (ret) >> + fprintf(stderr, "gpio<%s> test failed\n", prefix); >> + >> + if (cinfo) >> + free(cinfo); >> + >> + if (ret) >> + exit(EXIT_FAILURE); >> + >> + return ret; >> +} >> diff --git a/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh >> new file mode 100755 >> index 0000000..085d7a3 >> --- /dev/null >> +++ b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh >> @@ -0,0 +1,134 @@ >> + >> +is_consistent() >> +{ >> + val= >> + >> + active_low_sysfs=`cat $GPIO_SYSFS/gpio$nr/active_low` >> + val_sysfs=`cat $GPIO_SYSFS/gpio$nr/value` >> + dir_sysfs=`cat $GPIO_SYSFS/gpio$nr/direction` >> + >> + gpio_this_debugfs=`cat $GPIO_DEBUGFS |grep "gpio-$nr" | sed "s/(.*)//g"` >> + dir_debugfs=`echo $gpio_this_debugfs | awk '{print $2}'` >> + val_debugfs=`echo $gpio_this_debugfs | awk '{print $3}'` >> + if [ $val_debugfs = "lo" ]; then >> + val=0 >> + elif [ $val_debugfs = "hi" ]; then >> + val=1 >> + fi >> + >> + if [ $active_low_sysfs = "1" ]; then >> + if [ $val = "0" ]; then >> + val="1" >> + else >> + val="0" >> + fi >> + fi >> + >> + if [ $val_sysfs = $val ] && [ $dir_sysfs = $dir_debugfs ]; then >> + echo -n "." >> + else >> + echo "test fail, exit" >> + die >> + fi >> +} >> + >> +test_pin_logic() >> +{ >> + nr=$1 >> + direction=$2 >> + active_low=$3 >> + value=$4 >> + >> + echo $direction > $GPIO_SYSFS/gpio$nr/direction >> + echo $active_low > $GPIO_SYSFS/gpio$nr/active_low >> + if [ $direction = "out" ]; then >> + echo $value > $GPIO_SYSFS/gpio$nr/value >> + fi >> + is_consistent $nr >> +} >> + >> +test_one_pin() >> +{ >> + nr=$1 >> + >> + echo -n "test pin<$nr>" >> + >> + echo $nr > $GPIO_SYSFS/export 2>/dev/null >> + >> + if [ X$? != X0 ]; then >> + echo "test GPIO pin $nr failed" >> + die >> + fi >> + >> + #"Checking if the sysfs is consistent with debugfs: " >> + is_consistent $nr >> + >> + #"Checking the logic of active_low: " >> + test_pin_logic $nr out 1 1 >> + test_pin_logic $nr out 1 0 >> + test_pin_logic $nr out 0 1 >> + test_pin_logic $nr out 0 0 >> + >> + #"Checking the logic of direction: " >> + test_pin_logic $nr in 1 1 >> + test_pin_logic $nr out 1 0 >> + test_pin_logic $nr low 0 1 >> + test_pin_logic $nr high 0 0 >> + >> + echo $nr > $GPIO_SYSFS/unexport >> + >> + echo "successful" >> +} >> + >> +test_one_pin_fail() >> +{ >> + nr=$1 >> + >> + echo $nr > $GPIO_SYSFS/export 2>/dev/null >> + >> + if [ X$? != X0 ]; then >> + echo "test invalid pin $nr successful" >> + else >> + echo "test invalid pin $nr failed" >> + echo $nr > $GPIO_SYSFS/unexport 2>/dev/null >> + die >> + fi >> +} >> + >> +list_chip() >> +{ >> + echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null` >> +} >> + >> +test_chip() >> +{ >> + chip=$1 >> + name=`basename $chip` >> + base=`cat $chip/base` >> + ngpio=`cat $chip/ngpio` >> + printf "%-10s %-5s %-5s\n" $name $base $ngpio >> + if [ $ngpio = "0" ]; then >> + echo "number of gpio is zero is not allowed". >> + fi >> + test_one_pin $base >> + test_one_pin $(($base + $ngpio - 1)) >> + test_one_pin $((( RANDOM % $ngpio ) + $base )) >> +} >> + >> +test_chips_sysfs() >> +{ >> + gpiochip=`list_chip $module` >> + if [ X"$gpiochip" = X ]; then >> + if [ X"$valid" = Xfalse ]; then >> + echo "successful" >> + else >> + echo "fail" >> + die >> + fi >> + else >> + for chip in $gpiochip; do >> + test_chip $chip >> + done >> + fi >> +} >> + >> diff --git a/tools/testing/selftests/gpio/gpio-mockup.sh b/tools/testing/selftests/gpio/gpio-mockup.sh >> new file mode 100755 >> index 0000000..b183439 >> --- /dev/null >> +++ b/tools/testing/selftests/gpio/gpio-mockup.sh >> @@ -0,0 +1,201 @@ >> +#!/bin/bash >> + >> +#exit status >> +#1: run as non-root user >> +#2: sysfs/debugfs not mount >> +#3: insert module fail when gpio-mockup is a module. >> +#4: other reason. >> + >> +SYSFS= >> +GPIO_SYSFS= >> +GPIO_DRV_SYSFS= >> +DEBUGFS= >> +GPIO_DEBUGFS= >> +dev_type= >> +module= >> + >> +usage() >> +{ >> + echo "Usage:" >> + echo "$0 [-f] [-m name] [-t type]" >> + echo "-f: full test. It maybe conflict with existence gpio device." >> + echo "-m: module name, default name is gpio-mockup. It could also test" >> + echo " other gpio device." >> + echo "-t: interface type: chardev(char device) and sysfs(being" >> + echo " deprecated). The first one is default" >> + echo "" >> + echo "$0 -h" >> + echo "This usage" >> +} >> + >> +prerequisite() >> +{ >> + msg="skip all tests:" >> + if [ $UID != 0 ]; then >> + echo $msg must be run as root >&2 >> + exit 1 >> + fi >> + SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` >> + if [ ! -d "$SYSFS" ]; then >> + echo $msg sysfs is not mounted >&2 >> + exit 2 >> + fi >> + GPIO_SYSFS=`echo $SYSFS/class/gpio` >> + GPIO_DRV_SYSFS=`echo $SYSFS/devices/platform/$module/gpio` >> + DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'` >> + if [ ! -d "$DEBUGFS" ]; then >> + echo $msg debugfs is not mounted >&2 >> + exit 2 >> + fi >> + GPIO_DEBUGFS=`echo $DEBUGFS/gpio` >> + source gpio-mockup-sysfs.sh >> +} >> + >> +try_insert_module() >> +{ >> + if [ -d "$GPIO_DRV_SYSFS" ]; then >> + echo "$GPIO_DRV_SYSFS exist. Skip insert module" >> + else >> + modprobe -q $module $1 >> + if [ X$? != X0 ]; then >> + echo $msg insmod $module failed >&2 >> + exit 3 >> + fi >> + fi >> +} >> + >> +remove_module() >> +{ >> + modprobe -r -q $module >> +} >> + >> +die() >> +{ >> + remove_module >> + exit 4 >> +} >> + >> +test_chips() >> +{ >> + if [ X$dev_type = Xsysfs ]; then >> + echo "WARNING: sysfs ABI of gpio is going to deprecated." >> + test_chips_sysfs $* >> + else >> + $BASE/gpio-mockup-chardev $* >> + fi >> +} >> + >> +gpio_test() >> +{ >> + param=$1 >> + valid=$2 >> + >> + if [ X"$param" = X ]; then >> + die >> + fi >> + try_insert_module "gpio_mockup_ranges=$param" >> + echo -n "GPIO $module test with ranges: <" >> + echo "$param>: " >> + printf "%-10s %s\n" $param >> + test_chips $module $valid >> + remove_module >> +} >> + >> +BASE=`dirname $0` >> + >> +dev_type= >> +TEMP=`getopt -o fhm:t: -n '$0' -- "$@"` >> + >> +if [ "$?" != "0" ]; then >> + echo "Parameter process failed, Terminating..." >&2 >> + exit 1 >> +fi >> + >> +# Note the quotes around `$TEMP': they are essential! >> +eval set -- "$TEMP" >> + >> +while true; do >> + case $1 in >> + -f) >> + full_test=true >> + shift >> + ;; >> + -h) >> + usage >> + exit >> + ;; >> + -m) >> + module=$2 >> + shift 2 >> + ;; >> + -t) >> + dev_type=$2 >> + shift 2 >> + ;; >> + --) >> + shift >> + break >> + ;; >> + *) >> + echo "Internal error!" >> + exit 1 >> + ;; >> + esac >> +done >> + >> +if [ X"$module" = X ]; then >> + module="gpio-mockup" >> +fi >> + >> +if [ X$dev_type != Xsysfs ]; then >> + dev_type="chardev" >> +fi >> + >> +prerequisite >> + >> +echo "1. Test dynamic allocation of gpio successful means insert gpiochip and" >> +echo " manipulate gpio pin successful" >> +gpio_test "-1,32" true >> +gpio_test "-1,32,-1,32" true >> +gpio_test "-1,32,-1,32,-1,32" true >> +if [ X$full_test = Xtrue ]; then >> + gpio_test "-1,32,32,64" true >> + gpio_test "-1,32,40,64,-1,5" true >> + gpio_test "-1,32,32,64,-1,32" true >> + gpio_test "0,32,32,64,-1,32,-1,32" true >> + gpio_test "-1,32,-1,32,0,32,32,64" true >> + echo "2. Do basic test: successful means insert gpiochip and" >> + echo " manipulate gpio pin successful" >> + gpio_test "0,32" true >> + gpio_test "0,32,32,64" true >> + gpio_test "0,32,40,64,64,96" true >> +fi >> +echo "3. Error test: successful means insert gpiochip failed" >> +echo "3.1 Test number of gpio overflow" >> +#Currently: The max number of gpio(1024) is defined in arm architecture. >> +gpio_test "-1,32,-1,1024" false >> +if [ X$full_test = Xtrue ]; then >> + echo "3.2 Test zero line of gpio" >> + gpio_test "0,0" false >> + echo "3.3 Test range overlap" >> + echo "3.3.1 Test corner case" >> + gpio_test "0,32,0,1" false >> + gpio_test "0,32,32,64,32,40" false >> + gpio_test "0,32,35,64,35,45" false >> + gpio_test "0,32,31,32" false >> + gpio_test "0,32,32,64,36,37" false >> + gpio_test "0,32,35,64,34,36" false >> + echo "3.3.2 Test inserting invalid second gpiochip" >> + gpio_test "0,32,30,35" false >> + gpio_test "0,32,1,5" false >> + gpio_test "10,32,9,14" false >> + gpio_test "10,32,30,35" false >> + echo "3.3.3 Test others" >> + gpio_test "0,32,40,56,39,45" false >> + gpio_test "0,32,40,56,30,33" false >> + gpio_test "0,32,40,56,30,41" false >> + gpio_test "0,32,40,56,20,21" false >> +fi >> + >> +echo GPIO test PASS >> + >> > > > -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index ff9e5f2..2437dbc 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -6,6 +6,7 @@ TARGETS += exec TARGETS += firmware TARGETS += ftrace TARGETS += futex +TARGETS += gpio TARGETS += ipc TARGETS += kcmp TARGETS += lib diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile new file mode 100644 index 0000000..205e4d1 --- /dev/null +++ b/tools/testing/selftests/gpio/Makefile @@ -0,0 +1,23 @@ + +TEST_PROGS := gpio-mockup.sh +TEST_FILES := gpio-mockup-sysfs.sh $(BINARIES) +BINARIES := gpio-mockup-chardev + +include ../lib.mk + +all: $(BINARIES) + +clean: + $(RM) $(BINARIES) + +CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/ +LDLIBS += -lmount -I/usr/include/libmount + +$(BINARIES): ../../../gpio/gpio-utils.o ../../../../usr/include/linux/gpio.h + +../../../gpio/gpio-utils.o: + make ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C ../../../gpio + +../../../../usr/include/linux/gpio.h: + make -C ../../../.. headers_install INSTALL_HDR_PATH=$(shell pwd)/../../../../usr/ + diff --git a/tools/testing/selftests/gpio/gpio-mockup-chardev.c b/tools/testing/selftests/gpio/gpio-mockup-chardev.c new file mode 100644 index 0000000..667e916 --- /dev/null +++ b/tools/testing/selftests/gpio/gpio-mockup-chardev.c @@ -0,0 +1,324 @@ +/* + * GPIO chardev test helper + * + * Copyright (C) 2016 Bamvor Jian Zhang + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#define _GNU_SOURCE +#include <unistd.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> +#include <string.h> +#include <fcntl.h> +#include <getopt.h> +#include <sys/ioctl.h> +#include <libmount.h> +#include <err.h> +#include <dirent.h> +#include <linux/gpio.h> +#include "../../../gpio/gpio-utils.h" + +#define CONSUMER "gpio-selftest" +#define GC_NUM 10 +enum direction { + OUT, + IN +}; + +static int get_debugfs(char **path) +{ + struct libmnt_context *cxt; + struct libmnt_table *tb; + struct libmnt_iter *itr = NULL; + struct libmnt_fs *fs; + int found = 0; + + cxt = mnt_new_context(); + if (!cxt) + err(EXIT_FAILURE, "libmount context allocation failed"); + + itr = mnt_new_iter(MNT_ITER_FORWARD); + if (!itr) + err(EXIT_FAILURE, "failed to initialize libmount iterator"); + + if (mnt_context_get_mtab(cxt, &tb)) + err(EXIT_FAILURE, "failed to read mtab"); + + while (mnt_table_next_fs(tb, itr, &fs) == 0) { + const char *type = mnt_fs_get_fstype(fs); + + if (!strcmp(type, "debugfs")) { + found = 1; + break; + } + } + if (found) + asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); + + mnt_free_iter(itr); + mnt_free_context(cxt); + + if (!found) + return -1; + + return 0; +} + +static int gpio_debugfs_get(const char *consumer, int *dir, int *value) +{ + char *debugfs; + FILE *f; + char *line = NULL; + size_t len = 0; + char *cur; + int found = 0; + + if (get_debugfs(&debugfs) != 0) + err(EXIT_FAILURE, "debugfs is not mounted"); + + f = fopen(debugfs, "r"); + if (!f) + err(EXIT_FAILURE, "read from gpio debugfs failed"); + + /* + * gpio-2 ( |gpio-selftest ) in lo + */ + while (getline(&line, &len, f) != -1) { + cur = strstr(line, consumer); + if (cur == NULL) + continue; + + cur = strchr(line, ')'); + if (!cur) + continue; + + cur += 2; + if (!strncmp(cur, "out", 3)) { + *dir = OUT; + cur += 4; + } else if (!strncmp(cur, "in", 2)) { + *dir = IN; + cur += 4; + } + + if (!strncmp(cur, "hi", 2)) + *value = 1; + else if (!strncmp(cur, "lo", 2)) + *value = 0; + + found = 1; + break; + } + free(debugfs); + fclose(f); + free(line); + + if (!found) + return -1; + + return 0; +} + +static struct gpiochip_info *list_gpiochip(const char *gpiochip_name, int *ret) +{ + struct gpiochip_info *cinfo; + struct gpiochip_info *current; + const struct dirent *ent; + DIR *dp; + char *chrdev_name; + int fd; + int i = 0; + + cinfo = calloc(sizeof(struct gpiochip_info) * 4, GC_NUM + 1); + if (!cinfo) + err(EXIT_FAILURE, "gpiochip_info allocation failed"); + + current = cinfo; + dp = opendir("/dev"); + if (!dp) { + *ret = -errno; + goto error_out; + } else { + *ret = 0; + } + + while (ent = readdir(dp), ent) { + if (check_prefix(ent->d_name, "gpiochip")) { + *ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name); + if (*ret < 0) + goto error_out; + + fd = open(chrdev_name, 0); + if (fd == -1) { + *ret = -errno; + fprintf(stderr, "Failed to open %s\n", + chrdev_name); + goto error_close_dir; + } + *ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, current); + if (*ret == -1) { + perror("Failed to issue CHIPINFO IOCTL\n"); + goto error_close_dir; + } + close(fd); + if (strcmp(current->label, gpiochip_name) == 0 + || check_prefix(current->label, gpiochip_name)) { + *ret = 0; + current++; + i++; + } + } + } + + if ((!*ret && i == 0) || *ret < 0) { + free(cinfo); + cinfo = NULL; + } + if (!*ret && i > 0) { + cinfo = realloc(cinfo, sizeof(struct gpiochip_info) * 4 * i); + *ret = i; + } + +error_close_dir: + closedir(dp); +error_out: + if (*ret < 0) + err(EXIT_FAILURE, "list gpiochip failed: %s", strerror(*ret)); + + return cinfo; +} + +int gpio_pin_test(struct gpiochip_info *cinfo, int line, int flag, int value) +{ + struct gpiohandle_data data; + unsigned int lines[] = {line}; + int fd; + int debugfs_dir = IN; + int debugfs_value = 0; + int ret; + + data.values[0] = value; + ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data, + CONSUMER); + if (ret < 0) + goto fail_out; + else + fd = ret; + + ret = gpio_debugfs_get(CONSUMER, &debugfs_dir, &debugfs_value); + if (ret) { + ret = -EINVAL; + goto fail_out; + } + if (flag & GPIOHANDLE_REQUEST_INPUT) { + if (debugfs_dir != IN) { + errno = -EINVAL; + ret = -errno; + } + } else if (flag & GPIOHANDLE_REQUEST_OUTPUT) { + if (flag & GPIOHANDLE_REQUEST_ACTIVE_LOW) + debugfs_value = !debugfs_value; + + if (!(debugfs_dir == OUT && value == debugfs_value)) + errno = -EINVAL; + ret = -errno; + + } + gpiotools_release_linehandle(fd); + +fail_out: + if (ret) + err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>", + cinfo->name, line, flag, value); + + return ret; +} + +void gpio_pin_tests(struct gpiochip_info *cinfo, unsigned int line) +{ + printf("line<%d>", line); + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 0); + printf("."); + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 1); + printf("."); + gpio_pin_test(cinfo, line, + GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, + 0); + printf("."); + gpio_pin_test(cinfo, line, + GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, + 1); + printf("."); + gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_INPUT, 0); + printf("."); +} + +/* + * ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip + * Return 0 if successful or exit with EXIT_FAILURE if test failed. + * gpio_chip_name_prefix: The prefix of gpiochip you want to test. E.g. + * gpio-mockup + * is_valid_gpio_chip: Whether the gpio_chip is valid. 1 means valid, + * 0 means invalid which could not be found by + * list_gpiochip. + */ +int main(int argc, char *argv[]) +{ + char *prefix; + int valid; + struct gpiochip_info *cinfo; + struct gpiochip_info *current; + int i; + int ret; + + if (argc < 3) { + printf("Usage: %s prefix is_valid", argv[0]); + exit(EXIT_FAILURE); + } + + prefix = argv[1]; + valid = strcmp(argv[2], "true") == 0 ? 1 : 0; + + printf("Test gpiochip %s: ", prefix); + cinfo = list_gpiochip(prefix, &ret); + if (!cinfo) { + if (!valid && ret == 0) { + printf("Invalid test successful\n"); + ret = 0; + goto out; + } else { + ret = -EINVAL; + goto out; + } + } else if (cinfo && !valid) { + ret = -EINVAL; + goto out; + } + current = cinfo; + for (i = 0; i < ret; i++) { + gpio_pin_tests(current, 0); + gpio_pin_tests(current, current->lines - 1); + gpio_pin_tests(current, random() % current->lines); + current++; + } + ret = 0; + printf("successful\n"); + +out: + if (ret) + fprintf(stderr, "gpio<%s> test failed\n", prefix); + + if (cinfo) + free(cinfo); + + if (ret) + exit(EXIT_FAILURE); + + return ret; +} diff --git a/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh new file mode 100755 index 0000000..085d7a3 --- /dev/null +++ b/tools/testing/selftests/gpio/gpio-mockup-sysfs.sh @@ -0,0 +1,134 @@ + +is_consistent() +{ + val= + + active_low_sysfs=`cat $GPIO_SYSFS/gpio$nr/active_low` + val_sysfs=`cat $GPIO_SYSFS/gpio$nr/value` + dir_sysfs=`cat $GPIO_SYSFS/gpio$nr/direction` + + gpio_this_debugfs=`cat $GPIO_DEBUGFS |grep "gpio-$nr" | sed "s/(.*)//g"` + dir_debugfs=`echo $gpio_this_debugfs | awk '{print $2}'` + val_debugfs=`echo $gpio_this_debugfs | awk '{print $3}'` + if [ $val_debugfs = "lo" ]; then + val=0 + elif [ $val_debugfs = "hi" ]; then + val=1 + fi + + if [ $active_low_sysfs = "1" ]; then + if [ $val = "0" ]; then + val="1" + else + val="0" + fi + fi + + if [ $val_sysfs = $val ] && [ $dir_sysfs = $dir_debugfs ]; then + echo -n "." + else + echo "test fail, exit" + die + fi +} + +test_pin_logic() +{ + nr=$1 + direction=$2 + active_low=$3 + value=$4 + + echo $direction > $GPIO_SYSFS/gpio$nr/direction + echo $active_low > $GPIO_SYSFS/gpio$nr/active_low + if [ $direction = "out" ]; then + echo $value > $GPIO_SYSFS/gpio$nr/value + fi + is_consistent $nr +} + +test_one_pin() +{ + nr=$1 + + echo -n "test pin<$nr>" + + echo $nr > $GPIO_SYSFS/export 2>/dev/null + + if [ X$? != X0 ]; then + echo "test GPIO pin $nr failed" + die + fi + + #"Checking if the sysfs is consistent with debugfs: " + is_consistent $nr + + #"Checking the logic of active_low: " + test_pin_logic $nr out 1 1 + test_pin_logic $nr out 1 0 + test_pin_logic $nr out 0 1 + test_pin_logic $nr out 0 0 + + #"Checking the logic of direction: " + test_pin_logic $nr in 1 1 + test_pin_logic $nr out 1 0 + test_pin_logic $nr low 0 1 + test_pin_logic $nr high 0 0 + + echo $nr > $GPIO_SYSFS/unexport + + echo "successful" +} + +test_one_pin_fail() +{ + nr=$1 + + echo $nr > $GPIO_SYSFS/export 2>/dev/null + + if [ X$? != X0 ]; then + echo "test invalid pin $nr successful" + else + echo "test invalid pin $nr failed" + echo $nr > $GPIO_SYSFS/unexport 2>/dev/null + die + fi +} + +list_chip() +{ + echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null` +} + +test_chip() +{ + chip=$1 + name=`basename $chip` + base=`cat $chip/base` + ngpio=`cat $chip/ngpio` + printf "%-10s %-5s %-5s\n" $name $base $ngpio + if [ $ngpio = "0" ]; then + echo "number of gpio is zero is not allowed". + fi + test_one_pin $base + test_one_pin $(($base + $ngpio - 1)) + test_one_pin $((( RANDOM % $ngpio ) + $base )) +} + +test_chips_sysfs() +{ + gpiochip=`list_chip $module` + if [ X"$gpiochip" = X ]; then + if [ X"$valid" = Xfalse ]; then + echo "successful" + else + echo "fail" + die + fi + else + for chip in $gpiochip; do + test_chip $chip + done + fi +} + diff --git a/tools/testing/selftests/gpio/gpio-mockup.sh b/tools/testing/selftests/gpio/gpio-mockup.sh new file mode 100755 index 0000000..b183439 --- /dev/null +++ b/tools/testing/selftests/gpio/gpio-mockup.sh @@ -0,0 +1,201 @@ +#!/bin/bash + +#exit status +#1: run as non-root user +#2: sysfs/debugfs not mount +#3: insert module fail when gpio-mockup is a module. +#4: other reason. + +SYSFS= +GPIO_SYSFS= +GPIO_DRV_SYSFS= +DEBUGFS= +GPIO_DEBUGFS= +dev_type= +module= + +usage() +{ + echo "Usage:" + echo "$0 [-f] [-m name] [-t type]" + echo "-f: full test. It maybe conflict with existence gpio device." + echo "-m: module name, default name is gpio-mockup. It could also test" + echo " other gpio device." + echo "-t: interface type: chardev(char device) and sysfs(being" + echo " deprecated). The first one is default" + echo "" + echo "$0 -h" + echo "This usage" +} + +prerequisite() +{ + msg="skip all tests:" + if [ $UID != 0 ]; then + echo $msg must be run as root >&2 + exit 1 + fi + SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` + if [ ! -d "$SYSFS" ]; then + echo $msg sysfs is not mounted >&2 + exit 2 + fi + GPIO_SYSFS=`echo $SYSFS/class/gpio` + GPIO_DRV_SYSFS=`echo $SYSFS/devices/platform/$module/gpio` + DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'` + if [ ! -d "$DEBUGFS" ]; then + echo $msg debugfs is not mounted >&2 + exit 2 + fi + GPIO_DEBUGFS=`echo $DEBUGFS/gpio` + source gpio-mockup-sysfs.sh +} + +try_insert_module() +{ + if [ -d "$GPIO_DRV_SYSFS" ]; then + echo "$GPIO_DRV_SYSFS exist. Skip insert module" + else + modprobe -q $module $1 + if [ X$? != X0 ]; then + echo $msg insmod $module failed >&2 + exit 3 + fi + fi +} + +remove_module() +{ + modprobe -r -q $module +} + +die() +{ + remove_module + exit 4 +} + +test_chips() +{ + if [ X$dev_type = Xsysfs ]; then + echo "WARNING: sysfs ABI of gpio is going to deprecated." + test_chips_sysfs $* + else + $BASE/gpio-mockup-chardev $* + fi +} + +gpio_test() +{ + param=$1 + valid=$2 + + if [ X"$param" = X ]; then + die + fi + try_insert_module "gpio_mockup_ranges=$param" + echo -n "GPIO $module test with ranges: <" + echo "$param>: " + printf "%-10s %s\n" $param + test_chips $module $valid + remove_module +} + +BASE=`dirname $0` + +dev_type= +TEMP=`getopt -o fhm:t: -n '$0' -- "$@"` + +if [ "$?" != "0" ]; then + echo "Parameter process failed, Terminating..." >&2 + exit 1 +fi + +# Note the quotes around `$TEMP': they are essential! +eval set -- "$TEMP" + +while true; do + case $1 in + -f) + full_test=true + shift + ;; + -h) + usage + exit + ;; + -m) + module=$2 + shift 2 + ;; + -t) + dev_type=$2 + shift 2 + ;; + --) + shift + break + ;; + *) + echo "Internal error!" + exit 1 + ;; + esac +done + +if [ X"$module" = X ]; then + module="gpio-mockup" +fi + +if [ X$dev_type != Xsysfs ]; then + dev_type="chardev" +fi + +prerequisite + +echo "1. Test dynamic allocation of gpio successful means insert gpiochip and" +echo " manipulate gpio pin successful" +gpio_test "-1,32" true +gpio_test "-1,32,-1,32" true +gpio_test "-1,32,-1,32,-1,32" true +if [ X$full_test = Xtrue ]; then + gpio_test "-1,32,32,64" true + gpio_test "-1,32,40,64,-1,5" true + gpio_test "-1,32,32,64,-1,32" true + gpio_test "0,32,32,64,-1,32,-1,32" true + gpio_test "-1,32,-1,32,0,32,32,64" true + echo "2. Do basic test: successful means insert gpiochip and" + echo " manipulate gpio pin successful" + gpio_test "0,32" true + gpio_test "0,32,32,64" true + gpio_test "0,32,40,64,64,96" true +fi +echo "3. Error test: successful means insert gpiochip failed" +echo "3.1 Test number of gpio overflow" +#Currently: The max number of gpio(1024) is defined in arm architecture. +gpio_test "-1,32,-1,1024" false +if [ X$full_test = Xtrue ]; then + echo "3.2 Test zero line of gpio" + gpio_test "0,0" false + echo "3.3 Test range overlap" + echo "3.3.1 Test corner case" + gpio_test "0,32,0,1" false + gpio_test "0,32,32,64,32,40" false + gpio_test "0,32,35,64,35,45" false + gpio_test "0,32,31,32" false + gpio_test "0,32,32,64,36,37" false + gpio_test "0,32,35,64,34,36" false + echo "3.3.2 Test inserting invalid second gpiochip" + gpio_test "0,32,30,35" false + gpio_test "0,32,1,5" false + gpio_test "10,32,9,14" false + gpio_test "10,32,30,35" false + echo "3.3.3 Test others" + gpio_test "0,32,40,56,39,45" false + gpio_test "0,32,40,56,30,33" false + gpio_test "0,32,40,56,30,41" false + gpio_test "0,32,40,56,20,21" false +fi + +echo GPIO test PASS +