mirror of https://gitee.com/openkylin/linux.git
[WATCHDOG] hpwdt.c kdebug support
add kdebug support for the hpwdt.c driver. Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Thomas Mingarelli
Wim Van Sebroeck
parent
03ec58568a
commit
ab4ba3cdeb
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@ -116,6 +116,7 @@ static unsigned int reload; /* the computed soft_margin */
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static int nowayout = WATCHDOG_NOWAYOUT;
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static char expect_release;
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static unsigned long hpwdt_is_open;
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static unsigned int allow_kdump;
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static void __iomem *pci_mem_addr; /* the PCI-memory address */
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static unsigned long __iomem *hpwdt_timer_reg;
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@ -221,19 +222,19 @@ static int __devinit cru_detect(unsigned long map_entry,
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if (cmn_regs.u1.ral != 0) {
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printk(KERN_WARNING
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"hpwdt: Call succeeded but with an error: 0x%x\n",
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cmn_regs.u1.ral);
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"hpwdt: Call succeeded but with an error: 0x%x\n",
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cmn_regs.u1.ral);
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} else {
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physical_bios_base = cmn_regs.u2.rebx;
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physical_bios_offset = cmn_regs.u4.redx;
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cru_length = cmn_regs.u3.recx;
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cru_physical_address =
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physical_bios_base + physical_bios_offset;
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physical_bios_base + physical_bios_offset;
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/* If the values look OK, then map it in. */
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if ((physical_bios_base + physical_bios_offset)) {
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cru_rom_addr =
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ioremap(cru_physical_address, cru_length);
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ioremap(cru_physical_address, cru_length);
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if (cru_rom_addr)
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retval = 0;
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}
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@ -356,7 +357,6 @@ asm(".text \n\t"
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"call *%r12 \n\t"
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"pushfq \n\t"
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"popq %r12 \n\t"
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"popfq \n\t"
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"movl %eax, (%r9) \n\t"
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"movl %ebx, 4(%r9) \n\t"
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"movl %ecx, 8(%r9) \n\t"
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@ -390,10 +390,10 @@ static void __devinit dmi_find_cru(const struct dmi_header *dm)
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smbios_cru64_ptr = (struct smbios_cru64_info *) dm;
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if (smbios_cru64_ptr->signature == CRU_BIOS_SIGNATURE_VALUE) {
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cru_physical_address =
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smbios_cru64_ptr->physical_address +
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smbios_cru64_ptr->double_offset;
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smbios_cru64_ptr->physical_address +
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smbios_cru64_ptr->double_offset;
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cru_rom_addr = ioremap(cru_physical_address,
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smbios_cru64_ptr->double_length);
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smbios_cru64_ptr->double_length);
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}
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}
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}
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@ -405,41 +405,13 @@ static int __devinit detect_cru_service(void)
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dmi_walk(dmi_find_cru);
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/* if cru_rom_addr has been set then we found a CRU service */
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return ((cru_rom_addr != NULL) ? 0: -ENODEV);
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return ((cru_rom_addr != NULL) ? 0 : -ENODEV);
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}
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/* ------------------------------------------------------------------------- */
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#endif
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/*
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* NMI Handler
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*/
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static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
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void *data)
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{
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unsigned long rom_pl;
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static int die_nmi_called;
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if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)
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return NOTIFY_OK;
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spin_lock_irqsave(&rom_lock, rom_pl);
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if (!die_nmi_called)
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asminline_call(&cmn_regs, cru_rom_addr);
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die_nmi_called = 1;
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spin_unlock_irqrestore(&rom_lock, rom_pl);
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if (cmn_regs.u1.ral == 0) {
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printk(KERN_WARNING "hpwdt: An NMI occurred, "
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"but unable to determine source.\n");
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} else {
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panic("An NMI occurred, please see the Integrated "
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"Management Log for details.\n");
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}
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return NOTIFY_STOP;
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}
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/*
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* Watchdog operations
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*/
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@ -483,6 +455,36 @@ static int hpwdt_change_timer(int new_margin)
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return 0;
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}
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/*
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* NMI Handler
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*/
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static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
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void *data)
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{
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unsigned long rom_pl;
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static int die_nmi_called;
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if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)
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return NOTIFY_OK;
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spin_lock_irqsave(&rom_lock, rom_pl);
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if (!die_nmi_called)
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asminline_call(&cmn_regs, cru_rom_addr);
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die_nmi_called = 1;
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spin_unlock_irqrestore(&rom_lock, rom_pl);
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if (cmn_regs.u1.ral == 0) {
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printk(KERN_WARNING "hpwdt: An NMI occurred, "
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"but unable to determine source.\n");
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} else {
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if (allow_kdump)
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hpwdt_stop();
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panic("An NMI occurred, please see the Integrated "
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"Management Log for details.\n");
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}
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return NOTIFY_STOP;
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}
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/*
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* /dev/watchdog handling
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*/
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@ -625,17 +627,18 @@ static struct notifier_block die_notifier = {
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*/
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static int __devinit hpwdt_init_one(struct pci_dev *dev,
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const struct pci_device_id *ent)
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const struct pci_device_id *ent)
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{
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int retval;
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/*
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* First let's find out if we are on an iLO2 server. We will
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* not run on a legacy ASM box.
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* So we only support the G5 ProLiant servers and higher.
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*/
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if (dev->subsystem_vendor != PCI_VENDOR_ID_HP) {
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dev_warn(&dev->dev,
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"This server does not have an iLO2 ASIC.\n");
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"This server does not have an iLO2 ASIC.\n");
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return -ENODEV;
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}
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@ -669,7 +672,7 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
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retval = detect_cru_service();
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if (retval < 0) {
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dev_warn(&dev->dev,
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"Unable to detect the %d Bit CRU Service.\n",
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"Unable to detect the %d Bit CRU Service.\n",
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HPWDT_ARCH);
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goto error_get_cru;
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}
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@ -684,7 +687,7 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
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retval = register_die_notifier(&die_notifier);
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if (retval != 0) {
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dev_warn(&dev->dev,
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"Unable to register a die notifier (err=%d).\n",
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"Unable to register a die notifier (err=%d).\n",
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retval);
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goto error_die_notifier;
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}
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@ -699,8 +702,9 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
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printk(KERN_INFO
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"hp Watchdog Timer Driver: 1.00"
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", timer margin: %d seconds( nowayout=%d).\n",
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soft_margin, nowayout);
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", timer margin: %d seconds (nowayout=%d)"
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", allow kernel dump: %s (default = 0/OFF).\n",
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soft_margin, nowayout, (allow_kdump == 0) ? "OFF" : "ON");
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return 0;
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@ -755,6 +759,9 @@ MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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module_param(soft_margin, int, 0);
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MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
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module_param(allow_kdump, int, 0);
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MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
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module_param(nowayout, int, 0);
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MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
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__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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