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watchdog: hpwdt: add next gen HP servers

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This patch is required to enable hpwdt to work on next generation HP servers
with iLO.

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 2011-07-26 14:05:53 +01:00 committed by Wim Van Sebroeck
parent 2260286886
commit 5efc7a6222
1 changed files with 77 additions and 27 deletions
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104
drivers/watchdog/hpwdt.c
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@ -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