scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 322 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
new file mode 100644
index 000000000..6ce8afbea
--- /dev/null
+++ b/drivers/rtc/rtc-max8925.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * RTC driver for Maxim MAX8925
+ *
+ * Copyright (C) 2009-2010 Marvell International Ltd.
+ *	Haojian Zhuang <haojian.zhuang@marvell.com>
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max8925.h>
+
+enum {
+	RTC_SEC = 0,
+	RTC_MIN,
+	RTC_HOUR,
+	RTC_WEEKDAY,
+	RTC_DATE,
+	RTC_MONTH,
+	RTC_YEAR1,
+	RTC_YEAR2,
+};
+
+#define MAX8925_RTC_SEC			0x00
+#define MAX8925_RTC_MIN			0x01
+#define MAX8925_RTC_HOUR		0x02
+#define MAX8925_RTC_WEEKDAY		0x03
+#define MAX8925_RTC_DATE		0x04
+#define MAX8925_RTC_MONTH		0x05
+#define MAX8925_RTC_YEAR1		0x06
+#define MAX8925_RTC_YEAR2		0x07
+#define MAX8925_ALARM0_SEC		0x08
+#define MAX8925_ALARM0_MIN		0x09
+#define MAX8925_ALARM0_HOUR		0x0a
+#define MAX8925_ALARM0_WEEKDAY		0x0b
+#define MAX8925_ALARM0_DATE		0x0c
+#define MAX8925_ALARM0_MON		0x0d
+#define MAX8925_ALARM0_YEAR1		0x0e
+#define MAX8925_ALARM0_YEAR2		0x0f
+#define MAX8925_ALARM1_SEC		0x10
+#define MAX8925_ALARM1_MIN		0x11
+#define MAX8925_ALARM1_HOUR		0x12
+#define MAX8925_ALARM1_WEEKDAY		0x13
+#define MAX8925_ALARM1_DATE		0x14
+#define MAX8925_ALARM1_MON		0x15
+#define MAX8925_ALARM1_YEAR1		0x16
+#define MAX8925_ALARM1_YEAR2		0x17
+#define MAX8925_RTC_CNTL		0x1b
+#define MAX8925_RTC_STATUS		0x20
+
+#define TIME_NUM			8
+#define ALARM_1SEC			(1 << 7)
+#define HOUR_12				(1 << 7)
+#define HOUR_AM_PM			(1 << 5)
+#define ALARM0_IRQ			(1 << 3)
+#define ALARM1_IRQ			(1 << 2)
+#define ALARM0_STATUS			(1 << 2)
+#define ALARM1_STATUS			(1 << 1)
+
+
+struct max8925_rtc_info {
+	struct rtc_device	*rtc_dev;
+	struct max8925_chip	*chip;
+	struct i2c_client	*rtc;
+	struct device		*dev;
+	int			irq;
+};
+
+static irqreturn_t rtc_update_handler(int irq, void *data)
+{
+	struct max8925_rtc_info *info = (struct max8925_rtc_info *)data;
+
+	/* disable ALARM0 except for 1SEC alarm */
+	max8925_set_bits(info->rtc, MAX8925_ALARM0_CNTL, 0x7f, 0);
+	rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
+	return IRQ_HANDLED;
+}
+
+static int tm_calc(struct rtc_time *tm, unsigned char *buf, int len)
+{
+	if (len < TIME_NUM)
+		return -EINVAL;
+	tm->tm_year = (buf[RTC_YEAR2] >> 4) * 1000
+			+ (buf[RTC_YEAR2] & 0xf) * 100
+			+ (buf[RTC_YEAR1] >> 4) * 10
+			+ (buf[RTC_YEAR1] & 0xf);
+	tm->tm_year -= 1900;
+	tm->tm_mon = ((buf[RTC_MONTH] >> 4) & 0x01) * 10
+			+ (buf[RTC_MONTH] & 0x0f);
+	tm->tm_mday = ((buf[RTC_DATE] >> 4) & 0x03) * 10
+			+ (buf[RTC_DATE] & 0x0f);
+	tm->tm_wday = buf[RTC_WEEKDAY] & 0x07;
+	if (buf[RTC_HOUR] & HOUR_12) {
+		tm->tm_hour = ((buf[RTC_HOUR] >> 4) & 0x1) * 10
+				+ (buf[RTC_HOUR] & 0x0f);
+		if (buf[RTC_HOUR] & HOUR_AM_PM)
+			tm->tm_hour += 12;
+	} else
+		tm->tm_hour = ((buf[RTC_HOUR] >> 4) & 0x03) * 10
+				+ (buf[RTC_HOUR] & 0x0f);
+	tm->tm_min = ((buf[RTC_MIN] >> 4) & 0x7) * 10
+			+ (buf[RTC_MIN] & 0x0f);
+	tm->tm_sec = ((buf[RTC_SEC] >> 4) & 0x7) * 10
+			+ (buf[RTC_SEC] & 0x0f);
+	return 0;
+}
+
+static int data_calc(unsigned char *buf, struct rtc_time *tm, int len)
+{
+	unsigned char high, low;
+
+	if (len < TIME_NUM)
+		return -EINVAL;
+
+	high = (tm->tm_year + 1900) / 1000;
+	low = (tm->tm_year + 1900) / 100;
+	low = low - high * 10;
+	buf[RTC_YEAR2] = (high << 4) + low;
+	high = (tm->tm_year + 1900) / 10;
+	low = tm->tm_year + 1900;
+	low = low - high * 10;
+	high = high - (high / 10) * 10;
+	buf[RTC_YEAR1] = (high << 4) + low;
+	high = tm->tm_mon / 10;
+	low = tm->tm_mon;
+	low = low - high * 10;
+	buf[RTC_MONTH] = (high << 4) + low;
+	high = tm->tm_mday / 10;
+	low = tm->tm_mday;
+	low = low - high * 10;
+	buf[RTC_DATE] = (high << 4) + low;
+	buf[RTC_WEEKDAY] = tm->tm_wday;
+	high = tm->tm_hour / 10;
+	low = tm->tm_hour;
+	low = low - high * 10;
+	buf[RTC_HOUR] = (high << 4) + low;
+	high = tm->tm_min / 10;
+	low = tm->tm_min;
+	low = low - high * 10;
+	buf[RTC_MIN] = (high << 4) + low;
+	high = tm->tm_sec / 10;
+	low = tm->tm_sec;
+	low = low - high * 10;
+	buf[RTC_SEC] = (high << 4) + low;
+	return 0;
+}
+
+static int max8925_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct max8925_rtc_info *info = dev_get_drvdata(dev);
+	unsigned char buf[TIME_NUM];
+	int ret;
+
+	ret = max8925_bulk_read(info->rtc, MAX8925_RTC_SEC, TIME_NUM, buf);
+	if (ret < 0)
+		goto out;
+	ret = tm_calc(tm, buf, TIME_NUM);
+out:
+	return ret;
+}
+
+static int max8925_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	struct max8925_rtc_info *info = dev_get_drvdata(dev);
+	unsigned char buf[TIME_NUM];
+	int ret;
+
+	ret = data_calc(buf, tm, TIME_NUM);
+	if (ret < 0)
+		goto out;
+	ret = max8925_bulk_write(info->rtc, MAX8925_RTC_SEC, TIME_NUM, buf);
+out:
+	return ret;
+}
+
+static int max8925_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	struct max8925_rtc_info *info = dev_get_drvdata(dev);
+	unsigned char buf[TIME_NUM];
+	int ret;
+
+	ret = max8925_bulk_read(info->rtc, MAX8925_ALARM0_SEC, TIME_NUM, buf);
+	if (ret < 0)
+		goto out;
+	ret = tm_calc(&alrm->time, buf, TIME_NUM);
+	if (ret < 0)
+		goto out;
+	ret = max8925_reg_read(info->rtc, MAX8925_RTC_IRQ_MASK);
+	if (ret < 0)
+		goto out;
+	if (ret & ALARM0_IRQ) {
+		alrm->enabled = 0;
+	} else {
+		ret = max8925_reg_read(info->rtc, MAX8925_ALARM0_CNTL);
+		if (ret < 0)
+			goto out;
+		if (!ret)
+			alrm->enabled = 0;
+		else
+			alrm->enabled = 1;
+	}
+	ret = max8925_reg_read(info->rtc, MAX8925_RTC_STATUS);
+	if (ret < 0)
+		goto out;
+	if (ret & ALARM0_STATUS)
+		alrm->pending = 1;
+	else
+		alrm->pending = 0;
+	return 0;
+out:
+	return ret;
+}
+
+static int max8925_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	struct max8925_rtc_info *info = dev_get_drvdata(dev);
+	unsigned char buf[TIME_NUM];
+	int ret;
+
+	ret = data_calc(buf, &alrm->time, TIME_NUM);
+	if (ret < 0)
+		goto out;
+	ret = max8925_bulk_write(info->rtc, MAX8925_ALARM0_SEC, TIME_NUM, buf);
+	if (ret < 0)
+		goto out;
+	if (alrm->enabled)
+		/* only enable alarm on year/month/day/hour/min/sec */
+		ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x77);
+	else
+		ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x0);
+out:
+	return ret;
+}
+
+static const struct rtc_class_ops max8925_rtc_ops = {
+	.read_time	= max8925_rtc_read_time,
+	.set_time	= max8925_rtc_set_time,
+	.read_alarm	= max8925_rtc_read_alarm,
+	.set_alarm	= max8925_rtc_set_alarm,
+};
+
+static int max8925_rtc_probe(struct platform_device *pdev)
+{
+	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
+	struct max8925_rtc_info *info;
+	int ret;
+
+	info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_rtc_info),
+			    GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+	info->chip = chip;
+	info->rtc = chip->rtc;
+	info->dev = &pdev->dev;
+	info->irq = platform_get_irq(pdev, 0);
+
+	ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
+					rtc_update_handler, IRQF_ONESHOT,
+					"rtc-alarm0", info);
+	if (ret < 0) {
+		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
+			info->irq, ret);
+		return ret;
+	}
+
+	dev_set_drvdata(&pdev->dev, info);
+	/* XXX - isn't this redundant? */
+	platform_set_drvdata(pdev, info);
+
+	device_init_wakeup(&pdev->dev, true);
+
+	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8925-rtc",
+					&max8925_rtc_ops, THIS_MODULE);
+	ret = PTR_ERR(info->rtc_dev);
+	if (IS_ERR(info->rtc_dev)) {
+		dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int max8925_rtc_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+	if (device_may_wakeup(dev))
+		chip->wakeup_flag |= 1 << MAX8925_IRQ_RTC_ALARM0;
+	return 0;
+}
+static int max8925_rtc_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+	if (device_may_wakeup(dev))
+		chip->wakeup_flag &= ~(1 << MAX8925_IRQ_RTC_ALARM0);
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(max8925_rtc_pm_ops, max8925_rtc_suspend, max8925_rtc_resume);
+
+static struct platform_driver max8925_rtc_driver = {
+	.driver		= {
+		.name	= "max8925-rtc",
+		.pm     = &max8925_rtc_pm_ops,
+	},
+	.probe		= max8925_rtc_probe,
+};
+
+module_platform_driver(max8925_rtc_driver);
+
+MODULE_DESCRIPTION("Maxim MAX8925 RTC driver");
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
+MODULE_LICENSE("GPL");
+