* [libgpiod][PATCH v2 1/2] libgpiosim: new library for controlling the gpio-sim module
2022-01-24 16:24 [libgpiod][PATCH v2 0/2] libgpiosim: new testing library Bartosz Golaszewski
@ 2022-01-24 16:24 ` Bartosz Golaszewski
2022-01-24 16:24 ` [libgpiod][PATCH v2 2/2] tests: port C tests to libgpiosim Bartosz Golaszewski
1 sibling, 0 replies; 3+ messages in thread
From: Bartosz Golaszewski @ 2022-01-24 16:24 UTC (permalink / raw)
To: Kent Gibson, Linus Walleij, Andy Shevchenko, Viresh Kumar
Cc: linux-gpio, Bartosz Golaszewski
Add a C library for controlling the gpio-sim kernel module from various
libgpiod test suites. This aims at replacing the old gpio-mockup module
and its user-space library - libgpio-mockup - in the project's tree.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
---
configure.ac | 7 +-
tests/Makefile.am | 4 +-
tests/gpiosim/.gitignore | 4 +
tests/gpiosim/Makefile.am | 16 +
tests/gpiosim/gpiosim-selftest.c | 157 +++++
tests/gpiosim/gpiosim.c | 1030 ++++++++++++++++++++++++++++++
tests/gpiosim/gpiosim.h | 69 ++
7 files changed, 1283 insertions(+), 4 deletions(-)
create mode 100644 tests/gpiosim/.gitignore
create mode 100644 tests/gpiosim/Makefile.am
create mode 100644 tests/gpiosim/gpiosim-selftest.c
create mode 100644 tests/gpiosim/gpiosim.c
create mode 100644 tests/gpiosim/gpiosim.h
diff --git a/configure.ac b/configure.ac
index ce6de99..8e74104 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2017-2021 Bartosz Golaszewski <bartekgola@gmail.com>
+# SPDX-FileCopyrightText: 2017-2022 Bartosz Golaszewski <brgl@bgdev.pl>
AC_PREREQ([2.69])
@@ -31,6 +31,7 @@ AC_SUBST(ABI_CXX_VERSION, [2.1.1])
# ABI version for libgpiomockup (we need this since it can be installed if we
# enable install-tests).
AC_SUBST(ABI_MOCKUP_VERSION, [0.1.0])
+AC_SUBST(ABI_GPIOSIM_VERSION, [0.1.0])
AC_CONFIG_AUX_DIR([autostuff])
AC_CONFIG_MACRO_DIRS([m4])
@@ -126,10 +127,11 @@ AC_DEFUN([FUNC_NOT_FOUND_TESTS],
if test "x$with_tests" = xtrue
then
- # For libgpiomockup
+ # For libgpiomockup & libgpiosim
AC_CHECK_FUNC([qsort], [], [FUNC_NOT_FOUND_TESTS([qsort])])
PKG_CHECK_MODULES([KMOD], [libkmod >= 18])
PKG_CHECK_MODULES([UDEV], [libudev >= 215])
+ PKG_CHECK_MODULES([MOUNT], [mount >= 2.33.1])
# For core library tests
PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.50])
@@ -224,6 +226,7 @@ AC_CONFIG_FILES([Makefile
tools/Makefile
tests/Makefile
tests/mockup/Makefile
+ tests/gpiosim/Makefile
bindings/cxx/libgpiodcxx.pc
bindings/Makefile
bindings/cxx/Makefile
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 43b215e..8a3d7c9 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-or-later
-# SPDX-FileCopyrightText: 2017-2021 Bartosz Golaszewski <bartekgola@gmail.com>
+# SPDX-FileCopyrightText: 2017-2022 Bartosz Golaszewski <brgl@bgdev.pl>
-SUBDIRS = mockup
+SUBDIRS = mockup gpiosim
AM_CFLAGS = -I$(top_srcdir)/include/ -I$(top_srcdir)/tests/mockup/
AM_CFLAGS += -include $(top_builddir)/config.h
diff --git a/tests/gpiosim/.gitignore b/tests/gpiosim/.gitignore
new file mode 100644
index 0000000..5731644
--- /dev/null
+++ b/tests/gpiosim/.gitignore
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2017-2022 Bartosz Golaszewski <brgl@bgdev.pl>
+
+gpiosim-selftest
diff --git a/tests/gpiosim/Makefile.am b/tests/gpiosim/Makefile.am
new file mode 100644
index 0000000..ab5838a
--- /dev/null
+++ b/tests/gpiosim/Makefile.am
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2021-2022 Bartosz Golaszewski <brgl@bgdev.pl>
+
+lib_LTLIBRARIES = libgpiosim.la
+noinst_PROGRAMS = gpiosim-selftest
+
+AM_CFLAGS = -Wall -Wextra -g -fvisibility=hidden -std=gnu89
+AM_CFLAGS += -include $(top_builddir)/config.h
+
+libgpiosim_la_SOURCES = gpiosim.c gpiosim.h
+libgpiosim_la_CFLAGS = $(AM_CFLAGS) $(KMOD_CFLAGS) $(MOUNT_CFLAGS)
+libgpiosim_la_LDFLAGS = -version-info $(subst .,:,$(ABI_GPIOSIM_VERSION))
+libgpiosim_la_LDFLAGS += $(KMOD_LIBS) $(MOUNT_LIBS)
+
+gpiosim_selftest_SOURCES = gpiosim-selftest.c
+gpiosim_selftest_LDADD = libgpiosim.la
diff --git a/tests/gpiosim/gpiosim-selftest.c b/tests/gpiosim/gpiosim-selftest.c
new file mode 100644
index 0000000..205580d
--- /dev/null
+++ b/tests/gpiosim/gpiosim-selftest.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// SPDX-FileCopyrightText: 2021-2022 Bartosz Golaszewski <brgl@bgdev.pl>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "gpiosim.h"
+
+#define UNUSED __attribute__((unused))
+
+static const char *const line_names[] = {
+ "foo",
+ "bar",
+ "foobar",
+ NULL,
+ "barfoo",
+};
+
+int main(int argc UNUSED, char **argv UNUSED)
+{
+ struct gpiosim_bank *bank0, *bank1;
+ struct gpiosim_dev *dev;
+ struct gpiosim_ctx *ctx;
+ int ret, i;
+
+ printf("Creating gpiosim context\n");
+
+ ctx = gpiosim_ctx_new();
+ if (!ctx) {
+ perror("unable to create the gpios-sim context");
+ return EXIT_FAILURE;
+ }
+
+ printf("Creating a chip with random name\n");
+
+ dev = gpiosim_dev_new(ctx, NULL);
+ if (!dev) {
+ perror("Unable to create a chip with random name");
+ return EXIT_FAILURE;
+ }
+
+ printf("Creating a bank with a random name\n");
+
+ bank0 = gpiosim_bank_new(dev, NULL);
+ if (!bank0) {
+ perror("Unable to create a bank with random name");
+ return EXIT_FAILURE;
+ }
+
+ printf("Creating a bank with a specific name\n");
+
+ bank1 = gpiosim_bank_new(dev, "foobar");
+ if (!bank1) {
+ perror("Unable to create a bank with a specific name");
+ return EXIT_FAILURE;
+ }
+
+ printf("Setting the label of bank #2 to foobar\n");
+
+ ret = gpiosim_bank_set_label(bank1, "foobar");
+ if (ret) {
+ perror("Unable to set the label of bank #2");
+ return EXIT_FAILURE;
+ }
+
+ printf("Setting the number of lines in bank #1 to 16\n");
+
+ ret = gpiosim_bank_set_num_lines(bank0, 16);
+ if (ret) {
+ perror("Unable to set the number of lines");
+ return EXIT_FAILURE;
+ }
+
+ printf("Setting the number of lines in bank #2 to 8\n");
+
+ ret = gpiosim_bank_set_num_lines(bank1, 8);
+ if (ret) {
+ perror("Unable to set the number of lines");
+ return EXIT_FAILURE;
+ }
+
+ printf("Setting names for some lines in bank #1\n");
+
+ for (i = 0; i < 5; i++) {
+ ret = gpiosim_bank_set_line_name(bank0, i, line_names[i]);
+ if (ret) {
+ perror("Unable to set line names");
+ return EXIT_FAILURE;
+ }
+ }
+
+ printf("Hog a line on bank #2\n");
+
+ ret = gpiosim_bank_hog_line(bank1, 3, "xyz",
+ GPIOSIM_HOG_DIR_OUTPUT_HIGH);
+ if (ret) {
+ perror("Unable to hog a line");
+ return EXIT_FAILURE;
+ }
+
+ printf("Enabling the GPIO device\n");
+
+ ret = gpiosim_dev_enable(dev);
+ if (ret) {
+ perror("Unable to enable the device");
+ return EXIT_FAILURE;
+ }
+
+ printf("Setting the pull of a single line to pull-up\n");
+
+ ret = gpiosim_bank_set_pull(bank0, 6, GPIOSIM_PULL_UP);
+ if (ret) {
+ perror("Unable to set the pull");
+ return EXIT_FAILURE;
+ }
+
+ printf("Reading the pull back\n");
+
+ ret = gpiosim_bank_get_pull(bank0, 6);
+ if (ret < 0) {
+ perror("Unable to read the pull");
+ return EXIT_FAILURE;
+ }
+
+ if (ret != GPIOSIM_PULL_UP) {
+ fprintf(stderr, "Invalid pull value read\n");
+ return EXIT_FAILURE;
+ }
+
+ printf("Reading the value\n");
+
+ ret = gpiosim_bank_get_value(bank0, 6);
+ if (ret < 0) {
+ perror("Unable to read the value");
+ return EXIT_FAILURE;
+ }
+
+ if (ret != 1) {
+ fprintf(stderr, "Invalid value read\n");
+ return EXIT_FAILURE;
+ }
+
+ printf("Disabling the GPIO device\n");
+
+ ret = gpiosim_dev_disable(dev);
+ if (ret) {
+ perror("Error while disabling the device");
+ return EXIT_FAILURE;
+ }
+
+ gpiosim_bank_unref(bank1);
+ gpiosim_bank_unref(bank0);
+ gpiosim_dev_unref(dev);
+ gpiosim_ctx_unref(ctx);
+
+ return EXIT_SUCCESS;
+}
diff --git a/tests/gpiosim/gpiosim.c b/tests/gpiosim/gpiosim.c
new file mode 100644
index 0000000..1429b7e
--- /dev/null
+++ b/tests/gpiosim/gpiosim.c
@@ -0,0 +1,1030 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+// SPDX-FileCopyrightText: 2021-2022 Bartosz Golaszewski <brgl@bgdev.pl>
+
+#include <errno.h>
+#include <libkmod.h>
+#include <libmount.h>
+#include <linux/version.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/random.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+
+#include "gpiosim.h"
+
+#define GPIOSIM_API __attribute__((visibility("default")))
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
+/* FIXME Change the minimum version to v5.17.0 once released. */
+#define MIN_KERNEL_VERSION KERNEL_VERSION(5, 16, 0)
+
+struct refcount {
+ unsigned int cnt;
+ void (*release)(struct refcount *);
+};
+
+static void refcount_init(struct refcount *ref,
+ void (*release)(struct refcount *))
+{
+ ref->cnt = 1;
+ ref->release = release;
+}
+
+static void refcount_inc(struct refcount *ref)
+{
+ ref->cnt++;
+}
+
+static void refcount_dec(struct refcount *ref)
+{
+ ref->cnt--;
+
+ if (!ref->cnt)
+ ref->release(ref);
+}
+
+struct list_head {
+ struct list_head *prev;
+ struct list_head *next;
+};
+
+static void list_init(struct list_head *list)
+{
+ list->next = list;
+ list->prev = list;
+}
+
+static void list_add(struct list_head *new, struct list_head *head)
+{
+ struct list_head *prev = head->prev;
+
+ head->prev = new;
+ new->next = head;
+ new->prev = prev;
+ prev->next = new;
+}
+
+static void list_del(struct list_head *entry)
+{
+ struct list_head *prev = entry->prev, *next = entry->next;
+
+ prev->next = next;
+ next->prev = prev;
+}
+
+#define container_of(ptr, type, member) ({ \
+ void *__mptr = (void *)(ptr); \
+ ((type *)(__mptr - offsetof(type, member))); \
+})
+
+#define list_entry(ptr, type, member) \
+ container_of(ptr, type, member)
+
+#define list_first_entry(ptr, type, member) \
+ list_entry((ptr)->next, type, member)
+
+#define list_next_entry(pos, member) \
+ list_entry((pos)->member.next, typeof(*(pos)), member)
+
+#define list_entry_is_head(pos, head, member) \
+ (&pos->member == (head))
+
+#define list_for_each_entry(pos, head, member) \
+ for (pos = list_first_entry(head, typeof(*pos), member); \
+ !list_entry_is_head(pos, head, member); \
+ pos = list_next_entry(pos, member))
+
+static int open_write_close(int base_fd, const char *where, const char *what)
+{
+ ssize_t written, size;
+ int fd;
+
+ if (what)
+ size = strlen(what) + 1;
+ else
+ size = 1;
+
+ fd = openat(base_fd, where, O_WRONLY);
+ if (fd < 0)
+ return -1;
+
+ written = write(fd, what ?: "", size);
+ close(fd);
+ if (written < 0) {
+ return -1;
+ } else if (written != size) {
+ errno = EIO;
+ return -1;
+ }
+
+ return 0;
+}
+
+static int open_read_close(int base_fd, const char *where,
+ char *buf, size_t bufsize)
+{
+ ssize_t rd;
+ int fd;
+
+ fd = openat(base_fd, where, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ memset(buf, 0, bufsize);
+ rd = read(fd, buf, bufsize);
+ close(fd);
+ if (rd < 0)
+ return -1;
+
+ if (buf[rd - 1] == '\n')
+ buf[rd - 1] = '\0';
+
+ return 0;
+}
+
+static int check_kernel_version(void)
+{
+ unsigned int major, minor, release;
+ struct utsname un;
+ int ret;
+
+ ret = uname(&un);
+ if (ret)
+ return -1;
+
+ ret = sscanf(un.release, "%u.%u.%u", &major, &minor, &release);
+ if (ret != 3) {
+ errno = EFAULT;
+ return -1;
+ }
+
+ if (KERNEL_VERSION(major, minor, release) < MIN_KERNEL_VERSION) {
+ errno = EOPNOTSUPP;
+ return -1;
+ }
+
+ return 0;
+}
+
+static int check_gpiosim_module(void)
+{
+ struct kmod_module *module;
+ struct kmod_ctx *kmod;
+ const char *modpath;
+ int ret, initstate;
+
+ kmod = kmod_new(NULL, NULL);
+ if (!kmod)
+ return -1;
+
+ ret = kmod_module_new_from_name(kmod, "gpio-sim", &module);
+ if (ret)
+ goto out_unref_kmod;
+
+again:
+ /* First check if the module is already loaded or built-in. */
+ initstate = kmod_module_get_initstate(module);
+ if (initstate < 0) {
+ if (errno == ENOENT) {
+ /*
+ * It's not loaded, let's see if we can do it manually.
+ * See if we can find the module.
+ */
+ modpath = kmod_module_get_path(module);
+ if (!modpath) {
+ /* libkmod doesn't set errno. */
+ errno = ENOENT;
+ ret = -1;
+ goto out_unref_module;
+ }
+
+ ret = kmod_module_probe_insert_module(module,
+ KMOD_PROBE_IGNORE_LOADED,
+ NULL, NULL, NULL, NULL);
+ if (ret)
+ goto out_unref_module;
+
+ goto again;
+ } else {
+ if (errno == 0)
+ errno = EOPNOTSUPP;
+
+ goto out_unref_module;
+ }
+ }
+
+ if (initstate != KMOD_MODULE_BUILTIN &&
+ initstate != KMOD_MODULE_LIVE &&
+ initstate != KMOD_MODULE_COMING) {
+ errno = EPERM;
+ goto out_unref_module;
+ }
+
+ ret = 0;
+
+out_unref_module:
+ kmod_module_unref(module);
+out_unref_kmod:
+ kmod_unref(kmod);
+ return ret;
+}
+
+/* We don't have mkdtempat()... :( */
+static char *make_random_dir_at(int at)
+{
+ static const char chars[] = "abcdefghijklmnoprstquvwxyz"
+ "ABCDEFGHIJKLMNOPRSTQUVWXYZ"
+ "0123456789";
+
+ char name[] = "XXXXXXXXXXXX\0";
+ unsigned int idx, i;
+ int ret;
+
+again:
+ for (i = 0; i < sizeof(name) - 1; i++) {
+ ret = getrandom(&idx, sizeof(idx), GRND_NONBLOCK);
+ if (ret != sizeof(idx)) {
+ if (ret >= 0)
+ errno = EAGAIN;
+
+ return NULL;
+ }
+
+ name[i] = chars[idx % (ARRAY_SIZE(chars) - 1)];
+ }
+
+ ret = mkdirat(at, name, 0600);
+ if (ret) {
+ if (errno == EEXIST)
+ goto again;
+
+ return NULL;
+ }
+
+ return strdup(name);
+}
+
+static char *configfs_make_item_name(int at, const char *name)
+{
+ char *item_name;
+ int ret;
+
+ if (name) {
+ item_name = strdup(name);
+ if (!item_name)
+ return NULL;
+
+ ret = mkdirat(at, item_name, 0600);
+ if (ret) {
+ free(item_name);
+ return NULL;
+ }
+ } else {
+ item_name = make_random_dir_at(at);
+ if (!item_name)
+ return NULL;
+ }
+
+ return item_name;
+}
+
+struct gpiosim_ctx {
+ struct refcount refcnt;
+ int cfs_dir_fd;
+ char *cfs_mnt_dir;
+};
+
+struct gpiosim_dev {
+ struct refcount refcnt;
+ struct gpiosim_ctx *ctx;
+ bool live;
+ char *item_name;
+ char *dev_name;
+ int cfs_dir_fd;
+ int sysfs_dir_fd;
+ struct list_head banks;
+};
+
+struct gpiosim_bank {
+ struct refcount refcnt;
+ struct gpiosim_dev *dev;
+ struct list_head siblings;
+ char *item_name;
+ char *chip_name;
+ char *dev_path;
+ int cfs_dir_fd;
+ int sysfs_dir_fd;
+ unsigned int num_lines;
+};
+
+static int ctx_open_configfs_dir(struct gpiosim_ctx *ctx, const char *cfs_path)
+{
+ char *path;
+ int ret;
+
+ ret = asprintf(&path, "%s/gpio-sim", cfs_path);
+ if (ret < 0)
+ return -1;
+
+ ctx->cfs_dir_fd = open(path, O_RDONLY);
+ free(path);
+ if (ctx->cfs_dir_fd < 0)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * We don't need to check the configfs module as loading gpio-sim will pull it
+ * in but we need to find out if and where configfs was mounted. If it wasn't
+ * then as a last resort we'll try to mount it ourselves.
+ */
+static int ctx_get_configfs_fd(struct gpiosim_ctx *ctx)
+{
+ struct libmnt_context *mntctx;
+ struct libmnt_iter *iter;
+ struct libmnt_table *tb;
+ struct libmnt_fs *fs;
+ const char *type;
+ int ret;
+
+ /* Try to find out if and where configfs is mounted. */
+ mntctx = mnt_new_context();
+ if (!mntctx)
+ return -1;
+
+ ret = mnt_context_get_mtab(mntctx, &tb);
+ if (ret)
+ goto out_free_ctx;
+
+ iter = mnt_new_iter(MNT_ITER_FORWARD);
+ if (!iter)
+ goto out_free_ctx;
+
+ while (mnt_table_next_fs(tb, iter, &fs) == 0) {
+ type = mnt_fs_get_fstype(fs);
+
+ if (strcmp(type, "configfs") == 0) {
+ ret = ctx_open_configfs_dir(ctx, mnt_fs_get_target(fs));
+ if (ret)
+ goto out_free_iter;
+
+ ret = 0;
+ goto out_free_iter;
+ }
+ }
+
+ /* Didn't find any configfs mounts - let's try to do it ourselves. */
+ ctx->cfs_mnt_dir = strdup("/tmp/gpiosim-configfs-XXXXXX");
+ if (!ctx->cfs_mnt_dir)
+ goto out_free_iter;
+
+ ctx->cfs_mnt_dir = mkdtemp(ctx->cfs_mnt_dir);
+ if (!ctx->cfs_mnt_dir)
+ goto out_free_tmpdir;
+
+ ret = mount(NULL, ctx->cfs_mnt_dir, "configfs", MS_RELATIME, NULL);
+ if (ret)
+ goto out_rm_tmpdir;
+
+ ret = ctx_open_configfs_dir(ctx, ctx->cfs_mnt_dir);
+ if (ret == 0)
+ /* Skip unmounting & deleting the tmp directory on success. */
+ goto out_free_iter;
+
+ umount(ctx->cfs_mnt_dir);
+out_rm_tmpdir:
+ rmdir(ctx->cfs_mnt_dir);
+out_free_tmpdir:
+ free(ctx->cfs_mnt_dir);
+ ctx->cfs_mnt_dir = NULL;
+out_free_iter:
+ mnt_free_iter(iter);
+out_free_ctx:
+ mnt_free_context(mntctx);
+
+ return ret;
+}
+
+static void ctx_release(struct refcount *ref)
+{
+ struct gpiosim_ctx *ctx = container_of(ref, struct gpiosim_ctx, refcnt);
+
+ close(ctx->cfs_dir_fd);
+
+ if (ctx->cfs_mnt_dir) {
+ umount(ctx->cfs_mnt_dir);
+ rmdir(ctx->cfs_mnt_dir);
+ free(ctx->cfs_mnt_dir);
+ }
+
+ free(ctx);
+}
+
+GPIOSIM_API struct gpiosim_ctx *gpiosim_ctx_new(void)
+{
+ struct gpiosim_ctx *ctx;
+ int ret;
+
+ ret = check_kernel_version();
+ if (ret)
+ return NULL;
+
+ ret = check_gpiosim_module();
+ if (ret)
+ return NULL;
+
+ ctx = malloc(sizeof(*ctx));
+ if (!ctx)
+ return NULL;
+
+ memset(ctx, 0, sizeof(*ctx));
+ refcount_init(&ctx->refcnt, ctx_release);
+
+ ret = ctx_get_configfs_fd(ctx);
+ if (ret) {
+ free(ctx);
+ return NULL;
+ }
+
+ return ctx;
+}
+
+GPIOSIM_API struct gpiosim_ctx *gpiosim_ctx_ref(struct gpiosim_ctx *ctx)
+{
+ refcount_inc(&ctx->refcnt);
+
+ return ctx;
+}
+
+GPIOSIM_API void gpiosim_ctx_unref(struct gpiosim_ctx *ctx)
+{
+ refcount_dec(&ctx->refcnt);
+}
+
+static void dev_release(struct refcount *ref)
+{
+ struct gpiosim_dev *dev = container_of(ref, struct gpiosim_dev, refcnt);
+ struct gpiosim_ctx *ctx = dev->ctx;
+
+ if (dev->live)
+ gpiosim_dev_disable(dev);
+
+ unlinkat(ctx->cfs_dir_fd, dev->item_name, AT_REMOVEDIR);
+ close(dev->cfs_dir_fd);
+ free(dev->dev_name);
+ free(dev->item_name);
+ gpiosim_ctx_unref(ctx);
+ free(dev);
+}
+
+GPIOSIM_API struct gpiosim_dev *
+gpiosim_dev_new(struct gpiosim_ctx *ctx, const char *name)
+{
+ struct gpiosim_dev *dev;
+ int configfs_fd, ret;
+ char devname[128];
+ char *item_name;
+
+ item_name = configfs_make_item_name(ctx->cfs_dir_fd, name);
+ if (!item_name)
+ return NULL;
+
+ configfs_fd = openat(ctx->cfs_dir_fd, item_name, O_RDONLY);
+ if (configfs_fd < 0)
+ goto err_unlink;
+
+ dev = malloc(sizeof(*dev));
+ if (!dev)
+ goto err_close_fd;
+
+ ret = open_read_close(configfs_fd, "dev_name",
+ devname, sizeof(devname));
+ if (ret)
+ goto err_free_dev;
+
+ memset(dev, 0, sizeof(*dev));
+ refcount_init(&dev->refcnt, dev_release);
+ list_init(&dev->banks);
+ dev->cfs_dir_fd = configfs_fd;
+ dev->sysfs_dir_fd = -1;
+ dev->item_name = item_name;
+
+ dev->dev_name = strdup(devname);
+ if (!dev->dev_name)
+ goto err_free_dev;
+
+ dev->ctx = gpiosim_ctx_ref(ctx);
+
+ return dev;
+
+err_free_dev:
+ free(dev);
+err_close_fd:
+ close(configfs_fd);
+err_unlink:
+ unlinkat(ctx->cfs_dir_fd, item_name, AT_REMOVEDIR);
+ free(item_name);
+
+ return NULL;
+}
+
+GPIOSIM_API struct gpiosim_dev *gpiosim_dev_ref(struct gpiosim_dev *dev)
+{
+ refcount_inc(&dev->refcnt);
+
+ return dev;
+}
+
+GPIOSIM_API void gpiosim_dev_unref(struct gpiosim_dev *dev)
+{
+ refcount_dec(&dev->refcnt);
+}
+
+GPIOSIM_API struct gpiosim_ctx *gpiosim_dev_get_ctx(struct gpiosim_dev *dev)
+{
+ return gpiosim_ctx_ref(dev->ctx);
+}
+
+GPIOSIM_API const char *gpiosim_dev_get_name(struct gpiosim_dev *dev)
+{
+ return dev->dev_name;
+}
+
+static bool dev_check_pending(struct gpiosim_dev *dev)
+{
+ if (dev->live)
+ errno = EBUSY;
+
+ return !dev->live;
+}
+
+static bool dev_check_live(struct gpiosim_dev *dev)
+{
+ if (!dev->live)
+ errno = ENODEV;
+
+ return dev->live;
+}
+
+static int bank_set_chip_name(struct gpiosim_bank *bank)
+{
+ char chip_name[32];
+ int ret;
+
+ ret = open_read_close(bank->cfs_dir_fd, "chip_name",
+ chip_name, sizeof(chip_name));
+ if (ret)
+ return -1;
+
+ bank->chip_name = strdup(chip_name);
+ if (!bank->chip_name)
+ return -1;
+
+ return 0;
+}
+
+static int bank_set_dev_path(struct gpiosim_bank *bank)
+{
+ char dev_path[64];
+
+ snprintf(dev_path, sizeof(dev_path), "/dev/%s", bank->chip_name);
+
+ bank->dev_path = strdup(dev_path);
+ if (!bank->dev_path)
+ return -1;
+
+ return 0;
+}
+
+static int bank_open_sysfs_dir(struct gpiosim_bank *bank)
+{
+ struct gpiosim_dev *dev = bank->dev;
+ int fd;
+
+ fd = openat(dev->sysfs_dir_fd, bank->chip_name, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ bank->sysfs_dir_fd = fd;
+
+ return 0;
+}
+
+static int bank_enable(struct gpiosim_bank *bank)
+{
+ int ret;
+
+ ret = bank_set_chip_name(bank);
+ if (ret)
+ return -1;
+
+ ret = bank_set_dev_path(bank);
+ if (ret)
+ return -1;
+
+ return bank_open_sysfs_dir(bank);
+}
+
+static int dev_open_sysfs_dir(struct gpiosim_dev *dev)
+{
+ int ret, fd;
+ char *sysp;
+
+ ret = asprintf(&sysp, "/sys/devices/platform/%s", dev->dev_name);
+ if (ret < 0)
+ return -1;
+
+ fd = open(sysp, O_RDONLY);
+ free(sysp);
+ if (fd < 0)
+ return -1;
+
+ dev->sysfs_dir_fd = fd;
+
+ return 0;
+}
+
+/* Closes the sysfs dir for this device and all its child banks. */
+static void dev_close_sysfs_dirs(struct gpiosim_dev *dev)
+{
+ struct gpiosim_bank *bank;
+
+ list_for_each_entry(bank, &dev->banks, siblings) {
+ free(bank->chip_name);
+ free(bank->dev_path);
+ bank->chip_name = bank->dev_path = NULL;
+
+ if (bank->sysfs_dir_fd < 0)
+ break;
+
+ close(bank->sysfs_dir_fd);
+ bank->sysfs_dir_fd = -1;
+ }
+
+ close(dev->sysfs_dir_fd);
+ dev->sysfs_dir_fd = -1;
+}
+
+GPIOSIM_API int gpiosim_dev_enable(struct gpiosim_dev *dev)
+{
+ struct gpiosim_bank *bank;
+ int ret;
+
+ if (!dev_check_pending(dev))
+ return -1;
+
+ ret = open_write_close(dev->cfs_dir_fd, "live", "1");
+ if (ret)
+ return -1;
+
+ ret = dev_open_sysfs_dir(dev);
+ if (ret) {
+ open_write_close(dev->cfs_dir_fd, "live", "0");
+ return -1;
+ }
+
+ bank = container_of(&dev->banks, struct gpiosim_bank, siblings);
+
+ list_for_each_entry(bank, &dev->banks, siblings) {
+ ret = bank_enable(bank);
+ if (ret) {
+ dev_close_sysfs_dirs(dev);
+ open_write_close(dev->cfs_dir_fd, "live", "0");
+ return -1;
+ }
+ }
+
+ dev->live = true;
+
+ return 0;
+}
+
+GPIOSIM_API int gpiosim_dev_disable(struct gpiosim_dev *dev)
+{
+ int ret;
+
+ if (!dev_check_live(dev))
+ return -1;
+
+ ret = open_write_close(dev->cfs_dir_fd, "live", "0");
+ if (ret)
+ return ret;
+
+ dev_close_sysfs_dirs(dev);
+
+ dev->live = false;
+
+ return 0;
+}
+
+GPIOSIM_API bool gpiosim_dev_is_live(struct gpiosim_dev *dev)
+{
+ return dev->live;
+}
+
+static void bank_release(struct refcount *ref)
+{
+ struct gpiosim_bank *bank = container_of(ref, struct gpiosim_bank,
+ refcnt);
+ struct gpiosim_dev *dev = bank->dev;
+ unsigned int i;
+ char buf[64];
+
+ for (i = 0; i < bank->num_lines; i++) {
+ snprintf(buf, sizeof(buf), "line%u/hog", i);
+ unlinkat(bank->cfs_dir_fd, buf, AT_REMOVEDIR);
+ snprintf(buf, sizeof(buf), "line%u", i);
+ unlinkat(bank->cfs_dir_fd, buf, AT_REMOVEDIR);
+ }
+
+ list_del(&bank->siblings);
+ unlinkat(dev->cfs_dir_fd, bank->item_name, AT_REMOVEDIR);
+ gpiosim_dev_unref(dev);
+ close(bank->cfs_dir_fd);
+ free(bank->item_name);
+ free(bank);
+}
+
+GPIOSIM_API struct gpiosim_bank*
+gpiosim_bank_new(struct gpiosim_dev *dev, const char *name)
+{
+ struct gpiosim_bank *bank;
+ int configfs_fd;
+ char *item_name;
+
+ if (!dev_check_pending(dev))
+ return NULL;
+
+ item_name = configfs_make_item_name(dev->cfs_dir_fd, name);
+ if (!item_name)
+ return NULL;
+
+ configfs_fd = openat(dev->cfs_dir_fd, item_name, O_RDONLY);
+ if (configfs_fd < 0)
+ goto err_unlink;
+
+ bank = malloc(sizeof(*bank));
+ if (!bank)
+ goto err_close_cfs;
+
+ memset(bank, 0, sizeof(*bank));
+
+ refcount_init(&bank->refcnt, bank_release);
+ list_add(&bank->siblings, &dev->banks);
+ bank->cfs_dir_fd = configfs_fd;
+ bank->dev = gpiosim_dev_ref(dev);
+ bank->item_name = item_name;
+
+ return bank;
+
+err_close_cfs:
+ close(configfs_fd);
+err_unlink:
+ unlinkat(dev->cfs_dir_fd, item_name, AT_REMOVEDIR);
+
+ return NULL;
+}
+
+GPIOSIM_API struct gpiosim_bank *gpiosim_bank_ref(struct gpiosim_bank *bank)
+{
+ refcount_inc(&bank->refcnt);
+
+ return bank;
+}
+
+GPIOSIM_API void gpiosim_bank_unref(struct gpiosim_bank *bank)
+{
+ refcount_dec(&bank->refcnt);
+}
+
+GPIOSIM_API struct gpiosim_dev *gpiosim_bank_get_dev(struct gpiosim_bank *bank)
+{
+ return gpiosim_dev_ref(bank->dev);
+}
+
+GPIOSIM_API const char *gpiosim_bank_get_chip_name(struct gpiosim_bank *bank)
+{
+ return bank->chip_name;
+}
+
+GPIOSIM_API const char *gpiosim_bank_get_dev_path(struct gpiosim_bank *bank)
+{
+ return bank->dev_path;
+}
+
+GPIOSIM_API int gpiosim_bank_set_label(struct gpiosim_bank *bank,
+ const char *label)
+{
+ if (!dev_check_pending(bank->dev))
+ return -1;
+
+ return open_write_close(bank->cfs_dir_fd, "label", label);
+}
+
+GPIOSIM_API int gpiosim_bank_set_num_lines(struct gpiosim_bank *bank,
+ unsigned int num_lines)
+{
+ char buf[32];
+ int ret;
+
+ if (!dev_check_pending(bank->dev))
+ return -1;
+
+ snprintf(buf, sizeof(buf), "%u", num_lines);
+
+ ret = open_write_close(bank->cfs_dir_fd, "num_lines", buf);
+ if (ret)
+ return -1;
+
+ bank->num_lines = num_lines;
+
+ return 0;
+}
+
+/*
+ * Create a sub-directory under given bank's configfs directory. Do nothing
+ * if the directory exists and is writable. Mode is O_RDONLY.
+ */
+static int bank_mkdirat(struct gpiosim_bank *bank, const char *path)
+{
+ int ret;
+
+ ret = faccessat(bank->cfs_dir_fd, path, W_OK, 0);
+ if (ret) {
+ if (errno == ENOENT) {
+ ret = mkdirat(bank->cfs_dir_fd, path, O_RDONLY);
+ if (ret)
+ return -1;
+ } else {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+GPIOSIM_API int gpiosim_bank_set_line_name(struct gpiosim_bank *bank,
+ unsigned int offset,
+ const char *name)
+{
+ char buf[32];
+ int ret, fd;
+
+ if (!dev_check_pending(bank->dev))
+ return -1;
+
+ snprintf(buf, sizeof(buf), "line%u", offset);
+
+ ret = bank_mkdirat(bank, buf);
+ if (ret)
+ return -1;
+
+ fd = openat(bank->cfs_dir_fd, buf, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ ret = open_write_close(fd, "name", name ?: "");
+ close(fd);
+ return ret;
+}
+
+GPIOSIM_API int gpiosim_bank_hog_line(struct gpiosim_bank *bank,
+ unsigned int offset,
+ const char *name, int direction)
+{
+ char buf[64], *dir;
+ int ret, fd;
+
+ switch (direction) {
+ case GPIOSIM_HOG_DIR_INPUT:
+ dir = "input";
+ break;
+ case GPIOSIM_HOG_DIR_OUTPUT_HIGH:
+ dir = "output-high";
+ break;
+ case GPIOSIM_HOG_DIR_OUTPUT_LOW:
+ dir = "output-low";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (!dev_check_pending(bank->dev))
+ return -1;
+
+ snprintf(buf, sizeof(buf), "line%u", offset);
+
+ ret = bank_mkdirat(bank, buf);
+ if (ret)
+ return -1;
+
+ snprintf(buf, sizeof(buf), "line%u/hog", offset);
+
+ ret = bank_mkdirat(bank, buf);
+ if (ret)
+ return -1;
+
+ fd = openat(bank->cfs_dir_fd, buf, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ ret = open_write_close(fd, "name", name ?: "");
+ if (ret) {
+ close(fd);
+ return -1;
+ }
+
+ ret = open_write_close(fd, "direction", dir);
+ close(fd);
+ return ret;
+}
+
+GPIOSIM_API int gpiosim_bank_clear_hog(struct gpiosim_bank *bank,
+ unsigned int offset)
+{
+ char buf[64];
+
+ snprintf(buf, sizeof(buf), "line%u/hog", offset);
+
+ return unlinkat(bank->cfs_dir_fd, buf, AT_REMOVEDIR);
+}
+
+static int sysfs_read_bank_attr(struct gpiosim_bank *bank, unsigned int offset,
+ const char *attr, char *buf,
+ unsigned int bufsize)
+{
+ struct gpiosim_dev *dev = bank->dev;
+ char where[32];
+
+ if (!dev_check_live(dev))
+ return -1;
+
+ snprintf(where, sizeof(where), "sim_gpio%u/%s", offset, attr);
+
+ return open_read_close(bank->sysfs_dir_fd, where, buf, bufsize);
+}
+
+GPIOSIM_API int gpiosim_bank_get_value(struct gpiosim_bank *bank,
+ unsigned int offset)
+{
+ char what[3];
+ int ret;
+
+ ret = sysfs_read_bank_attr(bank, offset, "value", what, sizeof(what));
+ if (ret)
+ return ret;
+
+ if (what[0] == '0')
+ return 0;
+ if (what[0] == '1')
+ return 1;
+
+ errno = EIO;
+ return -1;
+}
+
+GPIOSIM_API int gpiosim_bank_get_pull(struct gpiosim_bank *bank,
+ unsigned int offset)
+{
+ char what[16];
+ int ret;
+
+ ret = sysfs_read_bank_attr(bank, offset, "pull", what, sizeof(what));
+ if (ret)
+ return ret;
+
+ if (strcmp(what, "pull-down") == 0)
+ return GPIOSIM_PULL_DOWN;
+ if (strcmp(what, "pull-up") == 0)
+ return GPIOSIM_PULL_UP;
+
+ errno = EIO;
+ return -1;
+}
+
+GPIOSIM_API int gpiosim_bank_set_pull(struct gpiosim_bank *bank,
+ unsigned int offset, int pull)
+{
+ struct gpiosim_dev *dev = bank->dev;
+ char where[32], what[16];
+
+ if (!dev_check_live(dev))
+ return -1;
+
+ if (pull != GPIOSIM_PULL_DOWN && pull != GPIOSIM_PULL_UP) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ snprintf(where, sizeof(where), "sim_gpio%u/pull", offset);
+ snprintf(what, sizeof(what),
+ pull == GPIOSIM_PULL_DOWN ? "pull-down" : "pull-up");
+
+ return open_write_close(bank->sysfs_dir_fd, where, what);
+}
diff --git a/tests/gpiosim/gpiosim.h b/tests/gpiosim/gpiosim.h
new file mode 100644
index 0000000..de38f3f
--- /dev/null
+++ b/tests/gpiosim/gpiosim.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/* SPDX-FileCopyrightText: 2021-2022 Bartosz Golaszewski <brgl@bgdev.pl> */
+
+#ifndef __GPIOD_GPIOSIM_H__
+#define __GPIOD_GPIOSIM_H__
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct gpiosim_ctx;
+struct gpiosim_dev;
+struct gpiosim_bank;
+
+enum {
+ GPIOSIM_PULL_DOWN = 1,
+ GPIOSIM_PULL_UP,
+};
+
+enum {
+ GPIOSIM_HOG_DIR_INPUT = 1,
+ GPIOSIM_HOG_DIR_OUTPUT_HIGH,
+ GPIOSIM_HOG_DIR_OUTPUT_LOW,
+};
+
+struct gpiosim_ctx *gpiosim_ctx_new(void);
+struct gpiosim_ctx *gpiosim_ctx_ref(struct gpiosim_ctx *ctx);
+void gpiosim_ctx_unref(struct gpiosim_ctx *ctx);
+
+struct gpiosim_dev *
+gpiosim_dev_new(struct gpiosim_ctx *ctx, const char *name);
+struct gpiosim_dev *gpiosim_dev_ref(struct gpiosim_dev *dev);
+void gpiosim_dev_unref(struct gpiosim_dev *dev);
+struct gpiosim_ctx *gpiosim_dev_get_ctx(struct gpiosim_dev *dev);
+const char *gpiosim_dev_get_name(struct gpiosim_dev *dev);
+
+int gpiosim_dev_enable(struct gpiosim_dev *dev);
+int gpiosim_dev_disable(struct gpiosim_dev *dev);
+bool gpiosim_dev_is_live(struct gpiosim_dev *dev);
+
+struct gpiosim_bank*
+gpiosim_bank_new(struct gpiosim_dev *dev, const char *name);
+struct gpiosim_bank *gpiosim_bank_ref(struct gpiosim_bank *bank);
+void gpiosim_bank_unref(struct gpiosim_bank *bank);
+struct gpiosim_dev *gpiosim_bank_get_dev(struct gpiosim_bank *bank);
+const char *gpiosim_bank_get_chip_name(struct gpiosim_bank *bank);
+const char *gpiosim_bank_get_dev_path(struct gpiosim_bank *bank);
+
+int gpiosim_bank_set_label(struct gpiosim_bank *bank, const char *label);
+int gpiosim_bank_set_num_lines(struct gpiosim_bank *bank,
+ unsigned int num_lines);
+int gpiosim_bank_set_line_name(struct gpiosim_bank *bank,
+ unsigned int offset, const char *name);
+int gpiosim_bank_hog_line(struct gpiosim_bank *bank, unsigned int offset,
+ const char *name, int direction);
+int gpiosim_bank_clear_hog(struct gpiosim_bank *bank, unsigned int offset);
+
+int gpiosim_bank_get_value(struct gpiosim_bank *bank, unsigned int offset);
+int gpiosim_bank_get_pull(struct gpiosim_bank *bank, unsigned int offset);
+int gpiosim_bank_set_pull(struct gpiosim_bank *bank,
+ unsigned int offset, int pull);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __GPIOD_GPIOSIM_H__ */
--
2.30.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* [libgpiod][PATCH v2 2/2] tests: port C tests to libgpiosim
2022-01-24 16:24 [libgpiod][PATCH v2 0/2] libgpiosim: new testing library Bartosz Golaszewski
2022-01-24 16:24 ` [libgpiod][PATCH v2 1/2] libgpiosim: new library for controlling the gpio-sim module Bartosz Golaszewski
@ 2022-01-24 16:24 ` Bartosz Golaszewski
1 sibling, 0 replies; 3+ messages in thread
From: Bartosz Golaszewski @ 2022-01-24 16:24 UTC (permalink / raw)
To: Kent Gibson, Linus Walleij, Andy Shevchenko, Viresh Kumar
Cc: linux-gpio, Bartosz Golaszewski
This converts the core library tests to using libgpiosim instead of
libgpiod-mockup while keeping the same interface for tests.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
---
tests/Makefile.am | 4 +-
tests/gpiod-test.c | 143 ++++++++++++++++++++++++++++++++-------------
tests/gpiod-test.h | 4 +-
3 files changed, 108 insertions(+), 43 deletions(-)
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8a3d7c9..7bf5e3f 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -3,13 +3,13 @@
SUBDIRS = mockup gpiosim
-AM_CFLAGS = -I$(top_srcdir)/include/ -I$(top_srcdir)/tests/mockup/
+AM_CFLAGS = -I$(top_srcdir)/include/ -I$(top_srcdir)/tests/gpiosim/
AM_CFLAGS += -include $(top_builddir)/config.h
AM_CFLAGS += -Wall -Wextra -g -std=gnu89 $(GLIB_CFLAGS)
AM_CFLAGS += -DG_LOG_DOMAIN=\"gpiod-test\"
AM_LDFLAGS = -pthread
LDADD = $(top_builddir)/lib/libgpiod.la
-LDADD += $(top_builddir)/tests/mockup/libgpiomockup.la
+LDADD += $(top_builddir)/tests/gpiosim/libgpiosim.la
LDADD += $(GLIB_LIBS)
bin_PROGRAMS = gpiod-test
diff --git a/tests/gpiod-test.c b/tests/gpiod-test.c
index ca5cdb3..aa9eaa4 100644
--- a/tests/gpiod-test.c
+++ b/tests/gpiod-test.c
@@ -1,9 +1,9 @@
// SPDX-License-Identifier: GPL-2.0-or-later
-// SPDX-FileCopyrightText: 2017-2021 Bartosz Golaszewski <bartekgola@gmail.com>
+// SPDX-FileCopyrightText: 2017-2022 Bartosz Golaszewski <brgl@bgdev.pl>
#include <errno.h>
#include <glib/gstdio.h>
-#include <gpio-mockup.h>
+#include <gpiosim.h>
#include <linux/version.h>
#include <stdio.h>
#include <sys/utsname.h>
@@ -30,7 +30,9 @@ struct gpiod_test_event_thread {
static struct {
GList *tests;
- struct gpio_mockup *mockup;
+ struct gpiosim_ctx *gpiosim;
+ GPtrArray *sim_chips;
+ GPtrArray *sim_banks;
} globals;
static void check_kernel(void)
@@ -61,29 +63,98 @@ static void check_kernel(void)
return;
}
+static void remove_gpiosim_chip(gpointer data)
+{
+ struct gpiosim_dev *dev = data;
+ gint ret;
+
+ ret = gpiosim_dev_disable(dev);
+ if (ret)
+ g_error("unable to uncommit a simulated GPIO device: %s",
+ g_strerror(errno));
+
+ gpiosim_dev_unref(dev);
+}
+
+static void remove_gpiosim_bank(gpointer data)
+{
+ struct gpiosim_bank *bank = data;
+
+ gpiosim_bank_unref(bank);
+}
+
static void test_func_wrapper(gconstpointer data)
{
const _GpiodTestCase *test = data;
- gint ret, flags = 0;
+ struct gpiosim_bank *sim_bank;
+ struct gpiosim_dev *sim_dev;
+ gchar *line_name, *label;
+ gchar chip_idx;
+ guint i, j;
+ gint ret;
+
+ globals.sim_chips = g_ptr_array_new_full(test->num_chips,
+ remove_gpiosim_chip);
+ globals.sim_banks = g_ptr_array_new_full(test->num_chips,
+ remove_gpiosim_bank);
+
+ for (i = 0; i < test->num_chips; i++) {
+ chip_idx = i + 65;
+
+ sim_dev = gpiosim_dev_new(globals.gpiosim, NULL);
+ if (!sim_dev)
+ g_error("unable to create a simulated GPIO chip: %s",
+ g_strerror(errno));
+
+ sim_bank = gpiosim_bank_new(sim_dev, NULL);
+ if (!sim_bank)
+ g_error("unable to create a simulated GPIO bank: %s",
+ g_strerror(errno));
+
+ label = g_strdup_printf("gpio-mockup-%c", chip_idx);
+ ret = gpiosim_bank_set_label(sim_bank, label);
+ g_free(label);
+ if (ret)
+ g_error("unable to set simulated chip label: %s",
+ g_strerror(errno));
+
+ ret = gpiosim_bank_set_num_lines(sim_bank, test->chip_sizes[i]);
+ if (ret)
+ g_error("unable to set the number of lines for a simulated chip: %s",
+ g_strerror(errno));
+
+ if (test->flags & GPIOD_TEST_FLAG_NAMED_LINES) {
+ for (j = 0; j < test->chip_sizes[i]; j++) {
+ line_name = g_strdup_printf("gpio-mockup-%c-%u",
+ chip_idx, j);
+
+ ret = gpiosim_bank_set_line_name(sim_bank, j,
+ line_name);
+ g_free(line_name);
+ if (ret)
+ g_error("unable to set the line names for a simulated bank: %s",
+ g_strerror(errno));
+ }
+ }
- if (test->flags & GPIOD_TEST_FLAG_NAMED_LINES)
- flags |= GPIO_MOCKUP_FLAG_NAMED_LINES;
+ ret = gpiosim_dev_enable(sim_dev);
+ if (ret)
+ g_error("unable to commit the simulated GPIO device: %s",
+ g_strerror(errno));
- ret = gpio_mockup_probe(globals.mockup, test->num_chips,
- test->chip_sizes, flags);
- if (ret)
- g_error("unable to probe gpio-mockup: %s", g_strerror(errno));
+ g_ptr_array_add(globals.sim_chips, sim_dev);
+ g_ptr_array_add(globals.sim_banks, sim_bank);
+ }
test->func();
- ret = gpio_mockup_remove(globals.mockup);
- if (ret)
- g_error("unable to remove gpio_mockup: %s", g_strerror(errno));
+ g_ptr_array_unref(globals.sim_banks);
+ g_ptr_array_unref(globals.sim_chips);
}
-static void unref_mockup(void)
+static void unref_gpiosim(void)
{
- gpio_mockup_unref(globals.mockup);
+ gpiosim_ctx_unref(globals.gpiosim);
}
static void add_test_from_list(gpointer element, gpointer data G_GNUC_UNUSED)
@@ -102,15 +173,15 @@ int main(gint argc, gchar **argv)
g_debug("%u tests registered", g_list_length(globals.tests));
/*
- * Setup libgpiomockup first so that it runs its own kernel version
+ * Setup libpiosim first so that it runs its own kernel version
* check before we tell the user our local requirements are met as
* well.
*/
- globals.mockup = gpio_mockup_new();
- if (!globals.mockup)
- g_error("unable to initialize gpio-mockup library: %s",
+ globals.gpiosim = gpiosim_ctx_new();
+ if (!globals.gpiosim)
+ g_error("unable to initialize gpiosim library: %s",
g_strerror(errno));
- atexit(unref_mockup);
+ atexit(unref_gpiosim);
check_kernel();
@@ -127,35 +198,27 @@ void _gpiod_test_register(_GpiodTestCase *test)
const gchar *gpiod_test_chip_path(guint idx)
{
- const gchar *path;
-
- path = gpio_mockup_chip_path(globals.mockup, idx);
- if (!path)
- g_error("unable to retrieve the chip path: %s",
- g_strerror(errno));
+ struct gpiosim_bank *bank = g_ptr_array_index(globals.sim_banks, idx);
- return path;
+ return gpiosim_bank_get_dev_path(bank);
}
const gchar *gpiod_test_chip_name(guint idx)
{
- const gchar *name;
-
- name = gpio_mockup_chip_name(globals.mockup, idx);
- if (!name)
- g_error("unable to retrieve the chip name: %s",
- g_strerror(errno));
+ struct gpiosim_bank *bank = g_ptr_array_index(globals.sim_banks, idx);
- return name;
+ return gpiosim_bank_get_chip_name(bank);
}
gint gpiod_test_chip_get_value(guint chip_index, guint line_offset)
{
+ struct gpiosim_bank *bank = g_ptr_array_index(globals.sim_banks,
+ chip_index);
gint ret;
- ret = gpio_mockup_get_value(globals.mockup, chip_index, line_offset);
+ ret = gpiosim_bank_get_value(bank, line_offset);
if (ret < 0)
- g_error("unable to read line value from gpio-mockup: %s",
+ g_error("unable to read line value from gpiosim: %s",
g_strerror(errno));
return ret;
@@ -163,12 +226,14 @@ gint gpiod_test_chip_get_value(guint chip_index, guint line_offset)
void gpiod_test_chip_set_pull(guint chip_index, guint line_offset, gint pull)
{
+ struct gpiosim_bank *bank = g_ptr_array_index(globals.sim_banks,
+ chip_index);
gint ret;
- ret = gpio_mockup_set_pull(globals.mockup, chip_index,
- line_offset, pull);
+ ret = gpiosim_bank_set_pull(bank, line_offset,
+ pull ? GPIOSIM_PULL_UP : GPIOSIM_PULL_DOWN);
if (ret)
- g_error("unable to set line pull in gpio-mockup: %s",
+ g_error("unable to set line pull in gpiosim: %s",
g_strerror(errno));
}
diff --git a/tests/gpiod-test.h b/tests/gpiod-test.h
index 61735d9..1f2a677 100644
--- a/tests/gpiod-test.h
+++ b/tests/gpiod-test.h
@@ -1,5 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* SPDX-FileCopyrightText: 2017-2021 Bartosz Golaszewski <bartekgola@gmail.com> */
+/* SPDX-FileCopyrightText: 2017-2022 Bartosz Golaszewski <brgl@bgdev.pl> */
/*
* Testing framework for the core library.
@@ -50,7 +50,7 @@ enum {
/*
* Register a test case function. The last argument is the array of numbers
- * of lines per mockup chip.
+ * of lines per simulated chip.
*/
#define GPIOD_TEST_CASE(_name, _flags, ...) \
static void _name(void); \
--
2.30.1
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