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Diffstat (limited to 'tools/testing/selftests/rtc/rtctest.c')
-rw-r--r--tools/testing/selftests/rtc/rtctest.c190
1 files changed, 181 insertions, 9 deletions
diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c
index 66af608fb4c6..be175c0e6ae3 100644
--- a/tools/testing/selftests/rtc/rtctest.c
+++ b/tools/testing/selftests/rtc/rtctest.c
@@ -20,16 +20,24 @@
#define NUM_UIE 3
#define ALARM_DELTA 3
+#define READ_LOOP_DURATION_SEC 30
+#define READ_LOOP_SLEEP_MS 11
static char *rtc_file = "/dev/rtc0";
+enum rtc_alarm_state {
+ RTC_ALARM_UNKNOWN,
+ RTC_ALARM_ENABLED,
+ RTC_ALARM_DISABLED,
+ RTC_ALARM_RES_MINUTE,
+};
+
FIXTURE(rtc) {
int fd;
};
FIXTURE_SETUP(rtc) {
self->fd = open(rtc_file, O_RDONLY);
- ASSERT_NE(-1, self->fd);
}
FIXTURE_TEARDOWN(rtc) {
@@ -40,6 +48,10 @@ TEST_F(rtc, date_read) {
int rc;
struct rtc_time rtc_tm;
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
/* Read the RTC time/date */
rc = ioctl(self->fd, RTC_RD_TIME, &rtc_tm);
ASSERT_NE(-1, rc);
@@ -49,10 +61,104 @@ TEST_F(rtc, date_read) {
rtc_tm.tm_hour, rtc_tm.tm_min, rtc_tm.tm_sec);
}
+static time_t rtc_time_to_timestamp(struct rtc_time *rtc_time)
+{
+ struct tm tm_time = {
+ .tm_sec = rtc_time->tm_sec,
+ .tm_min = rtc_time->tm_min,
+ .tm_hour = rtc_time->tm_hour,
+ .tm_mday = rtc_time->tm_mday,
+ .tm_mon = rtc_time->tm_mon,
+ .tm_year = rtc_time->tm_year,
+ };
+
+ return mktime(&tm_time);
+}
+
+static void nanosleep_with_retries(long ns)
+{
+ struct timespec req = {
+ .tv_sec = 0,
+ .tv_nsec = ns,
+ };
+ struct timespec rem;
+
+ while (nanosleep(&req, &rem) != 0) {
+ req.tv_sec = rem.tv_sec;
+ req.tv_nsec = rem.tv_nsec;
+ }
+}
+
+static enum rtc_alarm_state get_rtc_alarm_state(int fd, int need_seconds)
+{
+ struct rtc_param param = { 0 };
+ int rc;
+
+ /* Validate kernel reflects unsupported RTC alarm state */
+ param.param = RTC_PARAM_FEATURES;
+ param.index = 0;
+ rc = ioctl(fd, RTC_PARAM_GET, &param);
+ if (rc < 0)
+ return RTC_ALARM_UNKNOWN;
+
+ if ((param.uvalue & _BITUL(RTC_FEATURE_ALARM)) == 0)
+ return RTC_ALARM_DISABLED;
+
+ /* Check if alarm has desired granularity */
+ if (need_seconds && (param.uvalue & _BITUL(RTC_FEATURE_ALARM_RES_MINUTE)))
+ return RTC_ALARM_RES_MINUTE;
+
+ return RTC_ALARM_ENABLED;
+}
+
+TEST_F_TIMEOUT(rtc, date_read_loop, READ_LOOP_DURATION_SEC + 2) {
+ int rc;
+ long iter_count = 0;
+ struct rtc_time rtc_tm;
+ time_t start_rtc_read, prev_rtc_read;
+
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
+ TH_LOG("Continuously reading RTC time for %ds (with %dms breaks after every read).",
+ READ_LOOP_DURATION_SEC, READ_LOOP_SLEEP_MS);
+
+ rc = ioctl(self->fd, RTC_RD_TIME, &rtc_tm);
+ ASSERT_NE(-1, rc);
+ start_rtc_read = rtc_time_to_timestamp(&rtc_tm);
+ prev_rtc_read = start_rtc_read;
+
+ do {
+ time_t rtc_read;
+
+ rc = ioctl(self->fd, RTC_RD_TIME, &rtc_tm);
+ ASSERT_NE(-1, rc);
+
+ rtc_read = rtc_time_to_timestamp(&rtc_tm);
+ /* Time should not go backwards */
+ ASSERT_LE(prev_rtc_read, rtc_read);
+ /* Time should not increase more then 1s at a time */
+ ASSERT_GE(prev_rtc_read + 1, rtc_read);
+
+ /* Sleep 11ms to avoid killing / overheating the RTC */
+ nanosleep_with_retries(READ_LOOP_SLEEP_MS * 1000000);
+
+ prev_rtc_read = rtc_read;
+ iter_count++;
+ } while (prev_rtc_read <= start_rtc_read + READ_LOOP_DURATION_SEC);
+
+ TH_LOG("Performed %ld RTC time reads.", iter_count);
+}
+
TEST_F_TIMEOUT(rtc, uie_read, NUM_UIE + 2) {
int i, rc, irq = 0;
unsigned long data;
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
/* Turn on update interrupts */
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
@@ -78,6 +184,10 @@ TEST_F(rtc, uie_select) {
int i, rc, irq = 0;
unsigned long data;
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
/* Turn on update interrupts */
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
@@ -116,6 +226,17 @@ TEST_F(rtc, alarm_alm_set) {
fd_set readfds;
time_t secs, new;
int rc;
+ enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN;
+
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
+ alarm_state = get_rtc_alarm_state(self->fd, 1);
+ if (alarm_state == RTC_ALARM_DISABLED)
+ SKIP(return, "Skipping test since alarms are not supported.");
+ if (alarm_state == RTC_ALARM_RES_MINUTE)
+ SKIP(return, "Skipping test since alarms has only minute granularity.");
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);
@@ -125,6 +246,11 @@ TEST_F(rtc, alarm_alm_set) {
rc = ioctl(self->fd, RTC_ALM_SET, &tm);
if (rc == -1) {
+ /*
+ * Report error if rtc alarm was enabled. Fallback to check ioctl
+ * error number if rtc alarm state is unknown.
+ */
+ ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip alarms are not supported.");
return;
@@ -170,6 +296,17 @@ TEST_F(rtc, alarm_wkalm_set) {
fd_set readfds;
time_t secs, new;
int rc;
+ enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN;
+
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
+ alarm_state = get_rtc_alarm_state(self->fd, 1);
+ if (alarm_state == RTC_ALARM_DISABLED)
+ SKIP(return, "Skipping test since alarms are not supported.");
+ if (alarm_state == RTC_ALARM_RES_MINUTE)
+ SKIP(return, "Skipping test since alarms has only minute granularity.");
rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time);
ASSERT_NE(-1, rc);
@@ -181,6 +318,11 @@ TEST_F(rtc, alarm_wkalm_set) {
rc = ioctl(self->fd, RTC_WKALM_SET, &alarm);
if (rc == -1) {
+ /*
+ * Report error if rtc alarm was enabled. Fallback to check ioctl
+ * error number if rtc alarm state is unknown.
+ */
+ ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip alarms are not supported.");
return;
@@ -218,6 +360,15 @@ TEST_F_TIMEOUT(rtc, alarm_alm_set_minute, 65) {
fd_set readfds;
time_t secs, new;
int rc;
+ enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN;
+
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
+ alarm_state = get_rtc_alarm_state(self->fd, 0);
+ if (alarm_state == RTC_ALARM_DISABLED)
+ SKIP(return, "Skipping test since alarms are not supported.");
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);
@@ -227,6 +378,11 @@ TEST_F_TIMEOUT(rtc, alarm_alm_set_minute, 65) {
rc = ioctl(self->fd, RTC_ALM_SET, &tm);
if (rc == -1) {
+ /*
+ * Report error if rtc alarm was enabled. Fallback to check ioctl
+ * error number if rtc alarm state is unknown.
+ */
+ ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip alarms are not supported.");
return;
@@ -272,6 +428,15 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) {
fd_set readfds;
time_t secs, new;
int rc;
+ enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN;
+
+ if (self->fd == -1 && errno == ENOENT)
+ SKIP(return, "Skipping test since %s does not exist", rtc_file);
+ ASSERT_NE(-1, self->fd);
+
+ alarm_state = get_rtc_alarm_state(self->fd, 0);
+ if (alarm_state == RTC_ALARM_DISABLED)
+ SKIP(return, "Skipping test since alarms are not supported.");
rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time);
ASSERT_NE(-1, rc);
@@ -283,6 +448,11 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) {
rc = ioctl(self->fd, RTC_WKALM_SET, &alarm);
if (rc == -1) {
+ /*
+ * Report error if rtc alarm was enabled. Fallback to check ioctl
+ * error number if rtc alarm state is unknown.
+ */
+ ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state);
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip alarms are not supported.");
return;
@@ -313,15 +483,10 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) {
ASSERT_EQ(new, secs);
}
-static void __attribute__((constructor))
-__constructor_order_last(void)
-{
- if (!__constructor_order)
- __constructor_order = _CONSTRUCTOR_ORDER_BACKWARD;
-}
-
int main(int argc, char **argv)
{
+ int ret = -1;
+
switch (argc) {
case 2:
rtc_file = argv[1];
@@ -333,5 +498,12 @@ int main(int argc, char **argv)
return 1;
}
- return test_harness_run(argc, argv);
+ /* Run the test if rtc_file is accessible */
+ if (access(rtc_file, R_OK) == 0)
+ ret = test_harness_run(argc, argv);
+ else
+ ksft_exit_skip("[SKIP]: Cannot access rtc file %s - Exiting\n",
+ rtc_file);
+
+ return ret;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.