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linuxdebug/tools/testing/selftests/alsa/mixer-test.c

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// SPDX-License-Identifier: GPL-2.0
//
// kselftest for the ALSA mixer API
//
// Original author: Mark Brown <broonie@kernel.org>
// Copyright (c) 2021-2 Arm Limited
// This test will iterate over all cards detected in the system, exercising
// every mixer control it can find. This may conflict with other system
// software if there is audio activity so is best run on a system with a
// minimal active userspace.
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <limits.h>
#include <string.h>
#include <getopt.h>
#include <stdarg.h>
#include <ctype.h>
#include <math.h>
#include <errno.h>
#include <assert.h>
#include <alsa/asoundlib.h>
#include <poll.h>
#include <stdint.h>
#include "../kselftest.h"
#define TESTS_PER_CONTROL 7
struct card_data {
snd_ctl_t *handle;
int card;
struct pollfd pollfd;
int num_ctls;
snd_ctl_elem_list_t *ctls;
struct card_data *next;
};
struct ctl_data {
const char *name;
snd_ctl_elem_id_t *id;
snd_ctl_elem_info_t *info;
snd_ctl_elem_value_t *def_val;
int elem;
int event_missing;
int event_spurious;
struct card_data *card;
struct ctl_data *next;
};
static const char *alsa_config =
"ctl.hw {\n"
" @args [ CARD ]\n"
" @args.CARD.type string\n"
" type hw\n"
" card $CARD\n"
"}\n"
;
int num_cards = 0;
int num_controls = 0;
struct card_data *card_list = NULL;
struct ctl_data *ctl_list = NULL;
#ifdef SND_LIB_VER
#if SND_LIB_VERSION >= SND_LIB_VER(1, 2, 6)
#define LIB_HAS_LOAD_STRING
#endif
#endif
#ifndef LIB_HAS_LOAD_STRING
static int snd_config_load_string(snd_config_t **config, const char *s,
size_t size)
{
snd_input_t *input;
snd_config_t *dst;
int err;
assert(config && s);
if (size == 0)
size = strlen(s);
err = snd_input_buffer_open(&input, s, size);
if (err < 0)
return err;
err = snd_config_top(&dst);
if (err < 0) {
snd_input_close(input);
return err;
}
err = snd_config_load(dst, input);
snd_input_close(input);
if (err < 0) {
snd_config_delete(dst);
return err;
}
*config = dst;
return 0;
}
#endif
static void find_controls(void)
{
char name[32];
int card, ctl, err;
struct card_data *card_data;
struct ctl_data *ctl_data;
snd_config_t *config;
card = -1;
if (snd_card_next(&card) < 0 || card < 0)
return;
err = snd_config_load_string(&config, alsa_config, strlen(alsa_config));
if (err < 0) {
ksft_print_msg("Unable to parse custom alsa-lib configuration: %s\n",
snd_strerror(err));
ksft_exit_fail();
}
while (card >= 0) {
sprintf(name, "hw:%d", card);
card_data = malloc(sizeof(*card_data));
if (!card_data)
ksft_exit_fail_msg("Out of memory\n");
err = snd_ctl_open_lconf(&card_data->handle, name, 0, config);
if (err < 0) {
ksft_print_msg("Failed to get hctl for card %d: %s\n",
card, snd_strerror(err));
goto next_card;
}
/* Count controls */
snd_ctl_elem_list_malloc(&card_data->ctls);
snd_ctl_elem_list(card_data->handle, card_data->ctls);
card_data->num_ctls = snd_ctl_elem_list_get_count(card_data->ctls);
/* Enumerate control information */
snd_ctl_elem_list_alloc_space(card_data->ctls, card_data->num_ctls);
snd_ctl_elem_list(card_data->handle, card_data->ctls);
card_data->card = num_cards++;
card_data->next = card_list;
card_list = card_data;
num_controls += card_data->num_ctls;
for (ctl = 0; ctl < card_data->num_ctls; ctl++) {
ctl_data = malloc(sizeof(*ctl_data));
if (!ctl_data)
ksft_exit_fail_msg("Out of memory\n");
memset(ctl_data, 0, sizeof(*ctl_data));
ctl_data->card = card_data;
ctl_data->elem = ctl;
ctl_data->name = snd_ctl_elem_list_get_name(card_data->ctls,
ctl);
err = snd_ctl_elem_id_malloc(&ctl_data->id);
if (err < 0)
ksft_exit_fail_msg("Out of memory\n");
err = snd_ctl_elem_info_malloc(&ctl_data->info);
if (err < 0)
ksft_exit_fail_msg("Out of memory\n");
err = snd_ctl_elem_value_malloc(&ctl_data->def_val);
if (err < 0)
ksft_exit_fail_msg("Out of memory\n");
snd_ctl_elem_list_get_id(card_data->ctls, ctl,
ctl_data->id);
snd_ctl_elem_info_set_id(ctl_data->info, ctl_data->id);
err = snd_ctl_elem_info(card_data->handle,
ctl_data->info);
if (err < 0) {
ksft_print_msg("%s getting info for %d\n",
snd_strerror(err),
ctl_data->name);
}
snd_ctl_elem_value_set_id(ctl_data->def_val,
ctl_data->id);
ctl_data->next = ctl_list;
ctl_list = ctl_data;
}
/* Set up for events */
err = snd_ctl_subscribe_events(card_data->handle, true);
if (err < 0) {
ksft_exit_fail_msg("snd_ctl_subscribe_events() failed for card %d: %d\n",
card, err);
}
err = snd_ctl_poll_descriptors_count(card_data->handle);
if (err != 1) {
ksft_exit_fail_msg("Unexpected descriptor count %d for card %d\n",
err, card);
}
err = snd_ctl_poll_descriptors(card_data->handle,
&card_data->pollfd, 1);
if (err != 1) {
ksft_exit_fail_msg("snd_ctl_poll_descriptors() failed for %d\n",
card, err);
}
next_card:
if (snd_card_next(&card) < 0) {
ksft_print_msg("snd_card_next");
break;
}
}
snd_config_delete(config);
}
/*
* Block for up to timeout ms for an event, returns a negative value
* on error, 0 for no event and 1 for an event.
*/
static int wait_for_event(struct ctl_data *ctl, int timeout)
{
unsigned short revents;
snd_ctl_event_t *event;
int count, err;
unsigned int mask = 0;
unsigned int ev_id;
snd_ctl_event_alloca(&event);
do {
err = poll(&(ctl->card->pollfd), 1, timeout);
if (err < 0) {
ksft_print_msg("poll() failed for %s: %s (%d)\n",
ctl->name, strerror(errno), errno);
return -1;
}
/* Timeout */
if (err == 0)
return 0;
err = snd_ctl_poll_descriptors_revents(ctl->card->handle,
&(ctl->card->pollfd),
1, &revents);
if (err < 0) {
ksft_print_msg("snd_ctl_poll_descriptors_revents() failed for %s: %d\n",
ctl->name, err);
return err;
}
if (revents & POLLERR) {
ksft_print_msg("snd_ctl_poll_descriptors_revents() reported POLLERR for %s\n",
ctl->name);
return -1;
}
/* No read events */
if (!(revents & POLLIN)) {
ksft_print_msg("No POLLIN\n");
continue;
}
err = snd_ctl_read(ctl->card->handle, event);
if (err < 0) {
ksft_print_msg("snd_ctl_read() failed for %s: %d\n",
ctl->name, err);
return err;
}
if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM)
continue;
/* The ID returned from the event is 1 less than numid */
mask = snd_ctl_event_elem_get_mask(event);
ev_id = snd_ctl_event_elem_get_numid(event);
if (ev_id != snd_ctl_elem_info_get_numid(ctl->info)) {
ksft_print_msg("Event for unexpected ctl %s\n",
snd_ctl_event_elem_get_name(event));
continue;
}
if ((mask & SND_CTL_EVENT_MASK_REMOVE) == SND_CTL_EVENT_MASK_REMOVE) {
ksft_print_msg("Removal event for %s\n",
ctl->name);
return -1;
}
} while ((mask & SND_CTL_EVENT_MASK_VALUE) != SND_CTL_EVENT_MASK_VALUE);
return 1;
}
static bool ctl_value_index_valid(struct ctl_data *ctl,
snd_ctl_elem_value_t *val,
int index)
{
long int_val;
long long int64_val;
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_NONE:
ksft_print_msg("%s.%d Invalid control type NONE\n",
ctl->name, index);
return false;
case SND_CTL_ELEM_TYPE_BOOLEAN:
int_val = snd_ctl_elem_value_get_boolean(val, index);
switch (int_val) {
case 0:
case 1:
break;
default:
ksft_print_msg("%s.%d Invalid boolean value %ld\n",
ctl->name, index, int_val);
return false;
}
break;
case SND_CTL_ELEM_TYPE_INTEGER:
int_val = snd_ctl_elem_value_get_integer(val, index);
if (int_val < snd_ctl_elem_info_get_min(ctl->info)) {
ksft_print_msg("%s.%d value %ld less than minimum %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_min(ctl->info));
return false;
}
if (int_val > snd_ctl_elem_info_get_max(ctl->info)) {
ksft_print_msg("%s.%d value %ld more than maximum %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_max(ctl->info));
return false;
}
/* Only check step size if there is one and we're in bounds */
if (snd_ctl_elem_info_get_step(ctl->info) &&
(int_val - snd_ctl_elem_info_get_min(ctl->info) %
snd_ctl_elem_info_get_step(ctl->info))) {
ksft_print_msg("%s.%d value %ld invalid for step %ld minimum %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_step(ctl->info),
snd_ctl_elem_info_get_min(ctl->info));
return false;
}
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
int64_val = snd_ctl_elem_value_get_integer64(val, index);
if (int64_val < snd_ctl_elem_info_get_min64(ctl->info)) {
ksft_print_msg("%s.%d value %lld less than minimum %lld\n",
ctl->name, index, int64_val,
snd_ctl_elem_info_get_min64(ctl->info));
return false;
}
if (int64_val > snd_ctl_elem_info_get_max64(ctl->info)) {
ksft_print_msg("%s.%d value %lld more than maximum %lld\n",
ctl->name, index, int64_val,
snd_ctl_elem_info_get_max(ctl->info));
return false;
}
/* Only check step size if there is one and we're in bounds */
if (snd_ctl_elem_info_get_step64(ctl->info) &&
(int64_val - snd_ctl_elem_info_get_min64(ctl->info)) %
snd_ctl_elem_info_get_step64(ctl->info)) {
ksft_print_msg("%s.%d value %lld invalid for step %lld minimum %lld\n",
ctl->name, index, int64_val,
snd_ctl_elem_info_get_step64(ctl->info),
snd_ctl_elem_info_get_min64(ctl->info));
return false;
}
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
int_val = snd_ctl_elem_value_get_enumerated(val, index);
if (int_val < 0) {
ksft_print_msg("%s.%d negative value %ld for enumeration\n",
ctl->name, index, int_val);
return false;
}
if (int_val >= snd_ctl_elem_info_get_items(ctl->info)) {
ksft_print_msg("%s.%d value %ld more than item count %ld\n",
ctl->name, index, int_val,
snd_ctl_elem_info_get_items(ctl->info));
return false;
}
break;
default:
/* No tests for other types */
break;
}
return true;
}
/*
* Check that the provided value meets the constraints for the
* provided control.
*/
static bool ctl_value_valid(struct ctl_data *ctl, snd_ctl_elem_value_t *val)
{
int i;
bool valid = true;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++)
if (!ctl_value_index_valid(ctl, val, i))
valid = false;
return valid;
}
/*
* Check that we can read the default value and it is valid. Write
* tests use the read value to restore the default.
*/
static void test_ctl_get_value(struct ctl_data *ctl)
{
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("get_value.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* Can't test reading on an unreadable control */
if (!snd_ctl_elem_info_is_readable(ctl->info)) {
ksft_print_msg("%s is not readable\n", ctl->name);
ksft_test_result_skip("get_value.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
err = snd_ctl_elem_read(ctl->card->handle, ctl->def_val);
if (err < 0) {
ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
snd_strerror(err));
goto out;
}
if (!ctl_value_valid(ctl, ctl->def_val))
err = -EINVAL;
out:
ksft_test_result(err >= 0, "get_value.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool strend(const char *haystack, const char *needle)
{
size_t haystack_len = strlen(haystack);
size_t needle_len = strlen(needle);
if (needle_len > haystack_len)
return false;
return strcmp(haystack + haystack_len - needle_len, needle) == 0;
}
static void test_ctl_name(struct ctl_data *ctl)
{
bool name_ok = true;
bool check;
/* Only boolean controls should end in Switch */
if (strend(ctl->name, " Switch")) {
if (snd_ctl_elem_info_get_type(ctl->info) != SND_CTL_ELEM_TYPE_BOOLEAN) {
ksft_print_msg("%d.%d %s ends in Switch but is not boolean\n",
ctl->card->card, ctl->elem, ctl->name);
name_ok = false;
}
}
/* Writeable boolean controls should end in Switch */
if (snd_ctl_elem_info_get_type(ctl->info) == SND_CTL_ELEM_TYPE_BOOLEAN &&
snd_ctl_elem_info_is_writable(ctl->info)) {
if (!strend(ctl->name, " Switch")) {
ksft_print_msg("%d.%d %s is a writeable boolean but not a Switch\n",
ctl->card->card, ctl->elem, ctl->name);
name_ok = false;
}
}
ksft_test_result(name_ok, "name.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool show_mismatch(struct ctl_data *ctl, int index,
snd_ctl_elem_value_t *read_val,
snd_ctl_elem_value_t *expected_val)
{
long long expected_int, read_int;
/*
* We factor out the code to compare values representable as
* integers, ensure that check doesn't log otherwise.
*/
expected_int = 0;
read_int = 0;
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
expected_int = snd_ctl_elem_value_get_boolean(expected_val,
index);
read_int = snd_ctl_elem_value_get_boolean(read_val, index);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
expected_int = snd_ctl_elem_value_get_integer(expected_val,
index);
read_int = snd_ctl_elem_value_get_integer(read_val, index);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
expected_int = snd_ctl_elem_value_get_integer64(expected_val,
index);
read_int = snd_ctl_elem_value_get_integer64(read_val,
index);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
expected_int = snd_ctl_elem_value_get_enumerated(expected_val,
index);
read_int = snd_ctl_elem_value_get_enumerated(read_val,
index);
break;
default:
break;
}
if (expected_int != read_int) {
/*
* NOTE: The volatile attribute means that the hardware
* can voluntarily change the state of control element
* independent of any operation by software.
*/
bool is_volatile = snd_ctl_elem_info_is_volatile(ctl->info);
ksft_print_msg("%s.%d expected %lld but read %lld, is_volatile %d\n",
ctl->name, index, expected_int, read_int, is_volatile);
return !is_volatile;
} else {
return false;
}
}
/*
* Write a value then if possible verify that we get the expected
* result. An optional expected value can be provided if we expect
* the write to fail, for verifying that invalid writes don't corrupt
* anything.
*/
static int write_and_verify(struct ctl_data *ctl,
snd_ctl_elem_value_t *write_val,
snd_ctl_elem_value_t *expected_val)
{
int err, i;
bool error_expected, mismatch_shown;
snd_ctl_elem_value_t *initial_val, *read_val, *w_val;
snd_ctl_elem_value_alloca(&initial_val);
snd_ctl_elem_value_alloca(&read_val);
snd_ctl_elem_value_alloca(&w_val);
/*
* We need to copy the write value since writing can modify
* the value which causes surprises, and allocate an expected
* value if we expect to read back what we wrote.
*/
snd_ctl_elem_value_copy(w_val, write_val);
if (expected_val) {
error_expected = true;
} else {
error_expected = false;
snd_ctl_elem_value_alloca(&expected_val);
snd_ctl_elem_value_copy(expected_val, write_val);
}
/* Store the value before we write */
if (snd_ctl_elem_info_is_readable(ctl->info)) {
snd_ctl_elem_value_set_id(initial_val, ctl->id);
err = snd_ctl_elem_read(ctl->card->handle, initial_val);
if (err < 0) {
ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
snd_strerror(err));
return err;
}
}
/*
* Do the write, if we have an expected value ignore the error
* and carry on to validate the expected value.
*/
err = snd_ctl_elem_write(ctl->card->handle, w_val);
if (err < 0 && !error_expected) {
ksft_print_msg("snd_ctl_elem_write() failed: %s\n",
snd_strerror(err));
return err;
}
/* Can we do the verification part? */
if (!snd_ctl_elem_info_is_readable(ctl->info))
return err;
snd_ctl_elem_value_set_id(read_val, ctl->id);
err = snd_ctl_elem_read(ctl->card->handle, read_val);
if (err < 0) {
ksft_print_msg("snd_ctl_elem_read() failed: %s\n",
snd_strerror(err));
return err;
}
/*
* Check for an event if the value changed, or confirm that
* there was none if it didn't. We rely on the kernel
* generating the notification before it returns from the
* write, this is currently true, should that ever change this
* will most likely break and need updating.
*/
if (!snd_ctl_elem_info_is_volatile(ctl->info)) {
err = wait_for_event(ctl, 0);
if (snd_ctl_elem_value_compare(initial_val, read_val)) {
if (err < 1) {
ksft_print_msg("No event generated for %s\n",
ctl->name);
ctl->event_missing++;
}
} else {
if (err != 0) {
ksft_print_msg("Spurious event generated for %s\n",
ctl->name);
ctl->event_spurious++;
}
}
}
/*
* Use the libray to compare values, if there's a mismatch
* carry on and try to provide a more useful diagnostic than
* just "mismatch".
*/
if (!snd_ctl_elem_value_compare(expected_val, read_val))
return 0;
mismatch_shown = false;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++)
if (show_mismatch(ctl, i, read_val, expected_val))
mismatch_shown = true;
if (!mismatch_shown)
ksft_print_msg("%s read and written values differ\n",
ctl->name);
return -1;
}
/*
* Make sure we can write the default value back to the control, this
* should validate that at least some write works.
*/
static void test_ctl_write_default(struct ctl_data *ctl)
{
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("write_default.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
if (!snd_ctl_elem_info_is_writable(ctl->info)) {
ksft_print_msg("%s is not writeable\n", ctl->name);
ksft_test_result_skip("write_default.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* No idea what the default was for unreadable controls */
if (!snd_ctl_elem_info_is_readable(ctl->info)) {
ksft_print_msg("%s couldn't read default\n", ctl->name);
ksft_test_result_skip("write_default.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
err = write_and_verify(ctl, ctl->def_val, NULL);
ksft_test_result(err >= 0, "write_default.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool test_ctl_write_valid_boolean(struct ctl_data *ctl)
{
int err, i, j;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = 0; j < 2; j++) {
snd_ctl_elem_value_set_boolean(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_valid_integer(struct ctl_data *ctl)
{
int err;
int i;
long j, step;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
step = snd_ctl_elem_info_get_step(ctl->info);
if (!step)
step = 1;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = snd_ctl_elem_info_get_min(ctl->info);
j <= snd_ctl_elem_info_get_max(ctl->info); j += step) {
snd_ctl_elem_value_set_integer(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_valid_integer64(struct ctl_data *ctl)
{
int err, i;
long long j, step;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
step = snd_ctl_elem_info_get_step64(ctl->info);
if (!step)
step = 1;
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = snd_ctl_elem_info_get_min64(ctl->info);
j <= snd_ctl_elem_info_get_max64(ctl->info); j += step) {
snd_ctl_elem_value_set_integer64(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_valid_enumerated(struct ctl_data *ctl)
{
int err, i, j;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
for (j = 0; j < snd_ctl_elem_info_get_items(ctl->info); j++) {
snd_ctl_elem_value_set_enumerated(val, i, j);
err = write_and_verify(ctl, val, NULL);
if (err != 0)
fail = true;
}
}
return !fail;
}
static void test_ctl_write_valid(struct ctl_data *ctl)
{
bool pass;
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
if (!snd_ctl_elem_info_is_writable(ctl->info)) {
ksft_print_msg("%s is not writeable\n", ctl->name);
ksft_test_result_skip("write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
pass = test_ctl_write_valid_boolean(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
pass = test_ctl_write_valid_integer(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
pass = test_ctl_write_valid_integer64(ctl);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
pass = test_ctl_write_valid_enumerated(ctl);
break;
default:
/* No tests for this yet */
ksft_test_result_skip("write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* Restore the default value to minimise disruption */
err = write_and_verify(ctl, ctl->def_val, NULL);
if (err < 0)
pass = false;
ksft_test_result(pass, "write_valid.%d.%d\n",
ctl->card->card, ctl->elem);
}
static bool test_ctl_write_invalid_value(struct ctl_data *ctl,
snd_ctl_elem_value_t *val)
{
int err;
long val_read;
/* Ideally this will fail... */
err = snd_ctl_elem_write(ctl->card->handle, val);
if (err < 0)
return false;
/* ...but some devices will clamp to an in range value */
err = snd_ctl_elem_read(ctl->card->handle, val);
if (err < 0) {
ksft_print_msg("%s failed to read: %s\n",
ctl->name, snd_strerror(err));
return true;
}
return !ctl_value_valid(ctl, val);
}
static bool test_ctl_write_invalid_boolean(struct ctl_data *ctl)
{
int err, i;
long val_read;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_boolean(val, i, 2);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
return !fail;
}
static bool test_ctl_write_invalid_integer(struct ctl_data *ctl)
{
int i;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
if (snd_ctl_elem_info_get_min(ctl->info) != LONG_MIN) {
/* Just under range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i,
snd_ctl_elem_info_get_min(ctl->info) - 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Minimum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i, LONG_MIN);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
if (snd_ctl_elem_info_get_max(ctl->info) != LONG_MAX) {
/* Just over range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i,
snd_ctl_elem_info_get_max(ctl->info) + 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Maximum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer(val, i, LONG_MAX);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_invalid_integer64(struct ctl_data *ctl)
{
int i;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
if (snd_ctl_elem_info_get_min64(ctl->info) != LLONG_MIN) {
/* Just under range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i,
snd_ctl_elem_info_get_min64(ctl->info) - 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Minimum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i, LLONG_MIN);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
if (snd_ctl_elem_info_get_max64(ctl->info) != LLONG_MAX) {
/* Just over range */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i,
snd_ctl_elem_info_get_max64(ctl->info) + 1);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Maximum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_integer64(val, i, LLONG_MAX);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
}
return !fail;
}
static bool test_ctl_write_invalid_enumerated(struct ctl_data *ctl)
{
int err, i;
unsigned int val_read;
bool fail = false;
snd_ctl_elem_value_t *val;
snd_ctl_elem_value_alloca(&val);
snd_ctl_elem_value_set_id(val, ctl->id);
for (i = 0; i < snd_ctl_elem_info_get_count(ctl->info); i++) {
/* One beyond maximum */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_enumerated(val, i,
snd_ctl_elem_info_get_items(ctl->info));
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
/* Maximum representable value */
snd_ctl_elem_value_copy(val, ctl->def_val);
snd_ctl_elem_value_set_enumerated(val, i, UINT_MAX);
if (test_ctl_write_invalid_value(ctl, val))
fail = true;
}
return !fail;
}
static void test_ctl_write_invalid(struct ctl_data *ctl)
{
bool pass;
int err;
/* If the control is turned off let's be polite */
if (snd_ctl_elem_info_is_inactive(ctl->info)) {
ksft_print_msg("%s is inactive\n", ctl->name);
ksft_test_result_skip("write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
if (!snd_ctl_elem_info_is_writable(ctl->info)) {
ksft_print_msg("%s is not writeable\n", ctl->name);
ksft_test_result_skip("write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
switch (snd_ctl_elem_info_get_type(ctl->info)) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
pass = test_ctl_write_invalid_boolean(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER:
pass = test_ctl_write_invalid_integer(ctl);
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
pass = test_ctl_write_invalid_integer64(ctl);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
pass = test_ctl_write_invalid_enumerated(ctl);
break;
default:
/* No tests for this yet */
ksft_test_result_skip("write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
return;
}
/* Restore the default value to minimise disruption */
err = write_and_verify(ctl, ctl->def_val, NULL);
if (err < 0)
pass = false;
ksft_test_result(pass, "write_invalid.%d.%d\n",
ctl->card->card, ctl->elem);
}
static void test_ctl_event_missing(struct ctl_data *ctl)
{
ksft_test_result(!ctl->event_missing, "event_missing.%d.%d\n",
ctl->card->card, ctl->elem);
}
static void test_ctl_event_spurious(struct ctl_data *ctl)
{
ksft_test_result(!ctl->event_spurious, "event_spurious.%d.%d\n",
ctl->card->card, ctl->elem);
}
int main(void)
{
struct ctl_data *ctl;
ksft_print_header();
find_controls();
ksft_set_plan(num_controls * TESTS_PER_CONTROL);
for (ctl = ctl_list; ctl != NULL; ctl = ctl->next) {
/*
* Must test get_value() before we write anything, the
* test stores the default value for later cleanup.
*/
test_ctl_get_value(ctl);
test_ctl_name(ctl);
test_ctl_write_default(ctl);
test_ctl_write_valid(ctl);
test_ctl_write_invalid(ctl);
test_ctl_event_missing(ctl);
test_ctl_event_spurious(ctl);
}
ksft_exit_pass();
return 0;
}
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