diff options
Diffstat (limited to 'drivers/watchdog/hpwdt.c')
| -rw-r--r-- | drivers/watchdog/hpwdt.c | 104 |
1 files changed, 77 insertions, 27 deletions
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index 8cb26855bfe..410fba45378 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -36,7 +36,7 @@ #include <asm/cacheflush.h> #endif /* CONFIG_HPWDT_NMI_DECODING */ -#define HPWDT_VERSION "1.2.0" +#define HPWDT_VERSION "1.3.0" #define SECS_TO_TICKS(secs) ((secs) * 1000 / 128) #define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000) #define HPWDT_MAX_TIMER TICKS_TO_SECS(65535) @@ -87,6 +87,19 @@ struct smbios_cru64_info { }; #define SMBIOS_CRU64_INFORMATION 212 +/* type 219 */ +struct smbios_proliant_info { + u8 type; + u8 byte_length; + u16 handle; + u32 power_features; + u32 omega_features; + u32 reserved; + u32 misc_features; +}; +#define SMBIOS_ICRU_INFORMATION 219 + + struct cmn_registers { union { struct { @@ -132,6 +145,7 @@ struct cmn_registers { static unsigned int hpwdt_nmi_decoding; static unsigned int allow_kdump; static unsigned int priority; /* hpwdt at end of die_notify list */ +static unsigned int is_icru; static DEFINE_SPINLOCK(rom_lock); static void *cru_rom_addr; static struct cmn_registers cmn_regs; @@ -476,19 +490,22 @@ static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason, goto out; spin_lock_irqsave(&rom_lock, rom_pl); - if (!die_nmi_called) + if (!die_nmi_called && !is_icru) asminline_call(&cmn_regs, cru_rom_addr); die_nmi_called = 1; spin_unlock_irqrestore(&rom_lock, rom_pl); - if (cmn_regs.u1.ral == 0) { - printk(KERN_WARNING "hpwdt: An NMI occurred, " - "but unable to determine source.\n"); - } else { - if (allow_kdump) - hpwdt_stop(); - panic("An NMI occurred, please see the Integrated " - "Management Log for details.\n"); + if (!is_icru) { + if (cmn_regs.u1.ral == 0) { + printk(KERN_WARNING "hpwdt: An NMI occurred, " + "but unable to determine source.\n"); + } } + + if (allow_kdump) + hpwdt_stop(); + panic("An NMI occurred, please see the Integrated " + "Management Log for details.\n"); + out: return NOTIFY_OK; } @@ -659,30 +676,63 @@ static void __devinit hpwdt_check_nmi_decoding(struct pci_dev *dev) } #endif /* CONFIG_X86_LOCAL_APIC */ +/* + * dmi_find_icru + * + * Routine Description: + * This function checks whether or not we are on an iCRU-based server. + * This check is independent of architecture and needs to be made for + * any ProLiant system. + */ +static void __devinit dmi_find_icru(const struct dmi_header *dm, void *dummy) +{ + struct smbios_proliant_info *smbios_proliant_ptr; + + if (dm->type == SMBIOS_ICRU_INFORMATION) { + smbios_proliant_ptr = (struct smbios_proliant_info *) dm; + if (smbios_proliant_ptr->misc_features & 0x01) + is_icru = 1; + } +} + static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev) { int retval; /* - * We need to map the ROM to get the CRU service. - * For 32 bit Operating Systems we need to go through the 32 Bit - * BIOS Service Directory - * For 64 bit Operating Systems we get that service through SMBIOS. + * On typical CRU-based systems we need to map that service in + * the BIOS. For 32 bit Operating Systems we need to go through + * the 32 Bit BIOS Service Directory. For 64 bit Operating + * Systems we get that service through SMBIOS. + * + * On systems that support the new iCRU service all we need to + * do is call dmi_walk to get the supported flag value and skip + * the old cru detect code. */ - retval = detect_cru_service(); - if (retval < 0) { - dev_warn(&dev->dev, - "Unable to detect the %d Bit CRU Service.\n", - HPWDT_ARCH); - return retval; - } + dmi_walk(dmi_find_icru, NULL); + if (!is_icru) { - /* - * We know this is the only CRU call we need to make so lets keep as - * few instructions as possible once the NMI comes in. - */ - cmn_regs.u1.rah = 0x0D; - cmn_regs.u1.ral = 0x02; + /* + * We need to map the ROM to get the CRU service. + * For 32 bit Operating Systems we need to go through the 32 Bit + * BIOS Service Directory + * For 64 bit Operating Systems we get that service through SMBIOS. + */ + retval = detect_cru_service(); + if (retval < 0) { + dev_warn(&dev->dev, + "Unable to detect the %d Bit CRU Service.\n", + HPWDT_ARCH); + return retval; + } + + /* + * We know this is the only CRU call we need to make so lets keep as + * few instructions as possible once the NMI comes in. + */ + cmn_regs.u1.rah = 0x0D; + cmn_regs.u1.ral = 0x02; + } /* * If the priority is set to 1, then we will be put first on the |