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Commit 5efc7a62 authored by Thomas Mingarelli's avatar Thomas Mingarelli Committed by Wim Van Sebroeck
Browse files

watchdog: hpwdt: add next gen HP servers 



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

Signed-off-by: default avatarThomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 22602868

drivers/watchdog/hpwdt.c

+77 −27
Original line number Diff line number Diff line
@@ -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 (!is_icru) {

		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");

	}



out:

	return NOTIFY_OK;

}
@@ -659,10 +676,42 @@ 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;



	/*

	 * 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.

	 */

	dmi_walk(dmi_find_icru, NULL);

	if (!is_icru) {



		/*

		* We need to map the ROM to get the CRU service.

		* For 32 bit Operating Systems we need to go through the 32 Bit
@@ -683,6 +732,7 @@ static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev) 
		*/

		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