[Feature]add MT2731_MP2_MR2_SVN388 baseline version

Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/watchdog/hpwdt.c b/src/kernel/linux/v4.14/drivers/watchdog/hpwdt.c
new file mode 100644
index 0000000..b0a1580
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/watchdog/hpwdt.c
@@ -0,0 +1,444 @@
+/*
+ *	HPE WatchDog Driver
+ *	based on
+ *
+ *	SoftDog	0.05:	A Software Watchdog Device
+ *
+ *	(c) Copyright 2015 Hewlett Packard Enterprise Development LP
+ *	Thomas Mingarelli <thomas.mingarelli@hpe.com>
+ *
+ *	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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/bitops.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/watchdog.h>
+#include <asm/nmi.h>
+
+#define HPWDT_VERSION			"1.4.0"
+#define SECS_TO_TICKS(secs)		((secs) * 1000 / 128)
+#define TICKS_TO_SECS(ticks)		((ticks) * 128 / 1000)
+#define HPWDT_MAX_TIMER			TICKS_TO_SECS(65535)
+#define DEFAULT_MARGIN			30
+
+static unsigned int soft_margin = DEFAULT_MARGIN;	/* in seconds */
+static unsigned int reload;			/* the computed soft_margin */
+static bool nowayout = WATCHDOG_NOWAYOUT;
+#ifdef CONFIG_HPWDT_NMI_DECODING
+static unsigned int allow_kdump = 1;
+#endif
+static char expect_release;
+static unsigned long hpwdt_is_open;
+
+static void __iomem *pci_mem_addr;		/* the PCI-memory address */
+static unsigned long __iomem *hpwdt_nmistat;
+static unsigned long __iomem *hpwdt_timer_reg;
+static unsigned long __iomem *hpwdt_timer_con;
+
+static const struct pci_device_id hpwdt_devices[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB203) },	/* iLO2 */
+	{ PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3306) },	/* iLO3 */
+	{0},			/* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, hpwdt_devices);
+
+
+/*
+ *	Watchdog operations
+ */
+static void hpwdt_start(void)
+{
+	reload = SECS_TO_TICKS(soft_margin);
+	iowrite16(reload, hpwdt_timer_reg);
+	iowrite8(0x85, hpwdt_timer_con);
+}
+
+static void hpwdt_stop(void)
+{
+	unsigned long data;
+
+	data = ioread8(hpwdt_timer_con);
+	data &= 0xFE;
+	iowrite8(data, hpwdt_timer_con);
+}
+
+static void hpwdt_ping(void)
+{
+	iowrite16(reload, hpwdt_timer_reg);
+}
+
+static int hpwdt_change_timer(int new_margin)
+{
+	if (new_margin < 1 || new_margin > HPWDT_MAX_TIMER) {
+		pr_warn("New value passed in is invalid: %d seconds\n",
+			new_margin);
+		return -EINVAL;
+	}
+
+	soft_margin = new_margin;
+	pr_debug("New timer passed in is %d seconds\n", new_margin);
+	reload = SECS_TO_TICKS(soft_margin);
+
+	return 0;
+}
+
+static int hpwdt_time_left(void)
+{
+	return TICKS_TO_SECS(ioread16(hpwdt_timer_reg));
+}
+
+#ifdef CONFIG_HPWDT_NMI_DECODING
+static int hpwdt_my_nmi(void)
+{
+	return ioread8(hpwdt_nmistat) & 0x6;
+}
+
+/*
+ *	NMI Handler
+ */
+static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs)
+{
+	if ((ulReason == NMI_UNKNOWN) && !hpwdt_my_nmi())
+		return NMI_DONE;
+
+	if (allow_kdump)
+		hpwdt_stop();
+
+	nmi_panic(regs, "An NMI occurred. Depending on your system the reason "
+		"for the NMI is logged in any one of the following "
+		"resources:\n"
+		"1. Integrated Management Log (IML)\n"
+		"2. OA Syslog\n"
+		"3. OA Forward Progress Log\n"
+		"4. iLO Event Log");
+
+	return NMI_HANDLED;
+}
+#endif /* CONFIG_HPWDT_NMI_DECODING */
+
+/*
+ *	/dev/watchdog handling
+ */
+static int hpwdt_open(struct inode *inode, struct file *file)
+{
+	/* /dev/watchdog can only be opened once */
+	if (test_and_set_bit(0, &hpwdt_is_open))
+		return -EBUSY;
+
+	/* Start the watchdog */
+	hpwdt_start();
+	hpwdt_ping();
+
+	return nonseekable_open(inode, file);
+}
+
+static int hpwdt_release(struct inode *inode, struct file *file)
+{
+	/* Stop the watchdog */
+	if (expect_release == 42) {
+		hpwdt_stop();
+	} else {
+		pr_crit("Unexpected close, not stopping watchdog!\n");
+		hpwdt_ping();
+	}
+
+	expect_release = 0;
+
+	/* /dev/watchdog is being closed, make sure it can be re-opened */
+	clear_bit(0, &hpwdt_is_open);
+
+	return 0;
+}
+
+static ssize_t hpwdt_write(struct file *file, const char __user *data,
+	size_t len, loff_t *ppos)
+{
+	/* See if we got the magic character 'V' and reload the timer */
+	if (len) {
+		if (!nowayout) {
+			size_t i;
+
+			/* note: just in case someone wrote the magic character
+			 * five months ago... */
+			expect_release = 0;
+
+			/* scan to see whether or not we got the magic char. */
+			for (i = 0; i != len; i++) {
+				char c;
+				if (get_user(c, data + i))
+					return -EFAULT;
+				if (c == 'V')
+					expect_release = 42;
+			}
+		}
+
+		/* someone wrote to us, we should reload the timer */
+		hpwdt_ping();
+	}
+
+	return len;
+}
+
+static const struct watchdog_info ident = {
+	.options = WDIOF_SETTIMEOUT |
+		   WDIOF_KEEPALIVEPING |
+		   WDIOF_MAGICCLOSE,
+	.identity = "HPE iLO2+ HW Watchdog Timer",
+};
+
+static long hpwdt_ioctl(struct file *file, unsigned int cmd,
+	unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+	int new_margin, options;
+	int ret = -ENOTTY;
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		ret = 0;
+		if (copy_to_user(argp, &ident, sizeof(ident)))
+			ret = -EFAULT;
+		break;
+
+	case WDIOC_GETSTATUS:
+	case WDIOC_GETBOOTSTATUS:
+		ret = put_user(0, p);
+		break;
+
+	case WDIOC_KEEPALIVE:
+		hpwdt_ping();
+		ret = 0;
+		break;
+
+	case WDIOC_SETOPTIONS:
+		ret = get_user(options, p);
+		if (ret)
+			break;
+
+		if (options & WDIOS_DISABLECARD)
+			hpwdt_stop();
+
+		if (options & WDIOS_ENABLECARD) {
+			hpwdt_start();
+			hpwdt_ping();
+		}
+		break;
+
+	case WDIOC_SETTIMEOUT:
+		ret = get_user(new_margin, p);
+		if (ret)
+			break;
+
+		ret = hpwdt_change_timer(new_margin);
+		if (ret)
+			break;
+
+		hpwdt_ping();
+		/* Fall */
+	case WDIOC_GETTIMEOUT:
+		ret = put_user(soft_margin, p);
+		break;
+
+	case WDIOC_GETTIMELEFT:
+		ret = put_user(hpwdt_time_left(), p);
+		break;
+	}
+	return ret;
+}
+
+/*
+ *	Kernel interfaces
+ */
+static const struct file_operations hpwdt_fops = {
+	.owner = THIS_MODULE,
+	.llseek = no_llseek,
+	.write = hpwdt_write,
+	.unlocked_ioctl = hpwdt_ioctl,
+	.open = hpwdt_open,
+	.release = hpwdt_release,
+};
+
+static struct miscdevice hpwdt_miscdev = {
+	.minor = WATCHDOG_MINOR,
+	.name = "watchdog",
+	.fops = &hpwdt_fops,
+};
+
+/*
+ *	Init & Exit
+ */
+
+
+static int hpwdt_init_nmi_decoding(struct pci_dev *dev)
+{
+#ifdef CONFIG_HPWDT_NMI_DECODING
+	int retval;
+	/*
+	 * Only one function can register for NMI_UNKNOWN
+	 */
+	retval = register_nmi_handler(NMI_UNKNOWN, hpwdt_pretimeout, 0, "hpwdt");
+	if (retval)
+		goto error;
+	retval = register_nmi_handler(NMI_SERR, hpwdt_pretimeout, 0, "hpwdt");
+	if (retval)
+		goto error1;
+	retval = register_nmi_handler(NMI_IO_CHECK, hpwdt_pretimeout, 0, "hpwdt");
+	if (retval)
+		goto error2;
+
+	dev_info(&dev->dev,
+			"HPE Watchdog Timer Driver: NMI decoding initialized"
+			", allow kernel dump: %s (default = 1/ON)\n",
+			(allow_kdump == 0) ? "OFF" : "ON");
+	return 0;
+
+error2:
+	unregister_nmi_handler(NMI_SERR, "hpwdt");
+error1:
+	unregister_nmi_handler(NMI_UNKNOWN, "hpwdt");
+error:
+	dev_warn(&dev->dev,
+		"Unable to register a die notifier (err=%d).\n",
+		retval);
+	return retval;
+#endif	/* CONFIG_HPWDT_NMI_DECODING */
+	return 0;
+}
+
+static void hpwdt_exit_nmi_decoding(void)
+{
+#ifdef CONFIG_HPWDT_NMI_DECODING
+	unregister_nmi_handler(NMI_UNKNOWN, "hpwdt");
+	unregister_nmi_handler(NMI_SERR, "hpwdt");
+	unregister_nmi_handler(NMI_IO_CHECK, "hpwdt");
+#endif
+}
+
+static int hpwdt_init_one(struct pci_dev *dev,
+					const struct pci_device_id *ent)
+{
+	int retval;
+
+	/*
+	 * First let's find out if we are on an iLO2+ server. We will
+	 * not run on a legacy ASM box.
+	 * So we only support the G5 ProLiant servers and higher.
+	 */
+	if (dev->subsystem_vendor != PCI_VENDOR_ID_HP &&
+	    dev->subsystem_vendor != PCI_VENDOR_ID_HP_3PAR) {
+		dev_warn(&dev->dev,
+			"This server does not have an iLO2+ ASIC.\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * Ignore all auxilary iLO devices with the following PCI ID
+	 */
+	if (dev->subsystem_vendor == PCI_VENDOR_ID_HP &&
+	    dev->subsystem_device == 0x1979)
+		return -ENODEV;
+
+	if (pci_enable_device(dev)) {
+		dev_warn(&dev->dev,
+			"Not possible to enable PCI Device: 0x%x:0x%x.\n",
+			ent->vendor, ent->device);
+		return -ENODEV;
+	}
+
+	pci_mem_addr = pci_iomap(dev, 1, 0x80);
+	if (!pci_mem_addr) {
+		dev_warn(&dev->dev,
+			"Unable to detect the iLO2+ server memory.\n");
+		retval = -ENOMEM;
+		goto error_pci_iomap;
+	}
+	hpwdt_nmistat	= pci_mem_addr + 0x6e;
+	hpwdt_timer_reg = pci_mem_addr + 0x70;
+	hpwdt_timer_con = pci_mem_addr + 0x72;
+
+	/* Make sure that timer is disabled until /dev/watchdog is opened */
+	hpwdt_stop();
+
+	/* Make sure that we have a valid soft_margin */
+	if (hpwdt_change_timer(soft_margin))
+		hpwdt_change_timer(DEFAULT_MARGIN);
+
+	/* Initialize NMI Decoding functionality */
+	retval = hpwdt_init_nmi_decoding(dev);
+	if (retval != 0)
+		goto error_init_nmi_decoding;
+
+	retval = misc_register(&hpwdt_miscdev);
+	if (retval < 0) {
+		dev_warn(&dev->dev,
+			"Unable to register miscdev on minor=%d (err=%d).\n",
+			WATCHDOG_MINOR, retval);
+		goto error_misc_register;
+	}
+
+	dev_info(&dev->dev, "HPE Watchdog Timer Driver: %s"
+			", timer margin: %d seconds (nowayout=%d).\n",
+			HPWDT_VERSION, soft_margin, nowayout);
+	return 0;
+
+error_misc_register:
+	hpwdt_exit_nmi_decoding();
+error_init_nmi_decoding:
+	pci_iounmap(dev, pci_mem_addr);
+error_pci_iomap:
+	pci_disable_device(dev);
+	return retval;
+}
+
+static void hpwdt_exit(struct pci_dev *dev)
+{
+	if (!nowayout)
+		hpwdt_stop();
+
+	misc_deregister(&hpwdt_miscdev);
+	hpwdt_exit_nmi_decoding();
+	pci_iounmap(dev, pci_mem_addr);
+	pci_disable_device(dev);
+}
+
+static struct pci_driver hpwdt_driver = {
+	.name = "hpwdt",
+	.id_table = hpwdt_devices,
+	.probe = hpwdt_init_one,
+	.remove = hpwdt_exit,
+};
+
+MODULE_AUTHOR("Tom Mingarelli");
+MODULE_DESCRIPTION("hp watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(HPWDT_VERSION);
+
+module_param(soft_margin, int, 0);
+MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
+
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+		__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#ifdef CONFIG_HPWDT_NMI_DECODING
+module_param(allow_kdump, int, 0);
+MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
+#endif /* CONFIG_HPWDT_NMI_DECODING */
+
+module_pci_driver(hpwdt_driver);