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 * Generic EDAC defs
 *
 * Author: Dave Jiang <djiang@mvista.com>
 *
 * 2006-2008 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 *
 */
#ifndef _LINUX_EDAC_H_
#define _LINUX_EDAC_H_

#include <linux/atomic.h>
#include <linux/device.h>
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/numa.h>

#define EDAC_DEVICE_NAME_LEN	31

struct device;

#define EDAC_OPSTATE_INVAL	-1
#define EDAC_OPSTATE_POLL	0
#define EDAC_OPSTATE_NMI	1
#define EDAC_OPSTATE_INT	2

extern int edac_op_state;

struct bus_type *edac_get_sysfs_subsys(void);

static inline void opstate_init(void)
{
	switch (edac_op_state) {
	case EDAC_OPSTATE_POLL:
	case EDAC_OPSTATE_NMI:
		break;
	default:
		edac_op_state = EDAC_OPSTATE_POLL;
	}
	return;
}

/* Max length of a DIMM label*/
#define EDAC_MC_LABEL_LEN	31

/* Maximum size of the location string */
#define LOCATION_SIZE 256

/* Defines the maximum number of labels that can be reported */
#define EDAC_MAX_LABELS		8

/* String used to join two or more labels */
#define OTHER_LABEL " or "

/**
 * enum dev_type - describe the type of memory DRAM chips used at the stick
 * @DEV_UNKNOWN:	Can't be determined, or MC doesn't support detect it
 * @DEV_X1:		1 bit for data
 * @DEV_X2:		2 bits for data
 * @DEV_X4:		4 bits for data
 * @DEV_X8:		8 bits for data
 * @DEV_X16:		16 bits for data
 * @DEV_X32:		32 bits for data
 * @DEV_X64:		64 bits for data
 *
 * Typical values are x4 and x8.
 */
enum dev_type {
	DEV_UNKNOWN = 0,
	DEV_X1,
	DEV_X2,
	DEV_X4,
	DEV_X8,
	DEV_X16,
	DEV_X32,		/* Do these parts exist? */
	DEV_X64			/* Do these parts exist? */
};

#define DEV_FLAG_UNKNOWN	BIT(DEV_UNKNOWN)
#define DEV_FLAG_X1		BIT(DEV_X1)
#define DEV_FLAG_X2		BIT(DEV_X2)
#define DEV_FLAG_X4		BIT(DEV_X4)
#define DEV_FLAG_X8		BIT(DEV_X8)
#define DEV_FLAG_X16		BIT(DEV_X16)
#define DEV_FLAG_X32		BIT(DEV_X32)
#define DEV_FLAG_X64		BIT(DEV_X64)

/**
 * enum hw_event_mc_err_type - type of the detected error
 *
 * @HW_EVENT_ERR_CORRECTED:	Corrected Error - Indicates that an ECC
 *				corrected error was detected
 * @HW_EVENT_ERR_UNCORRECTED:	Uncorrected Error - Indicates an error that
 *				can't be corrected by ECC, but it is not
 *				fatal (maybe it is on an unused memory area,
 *				or the memory controller could recover from
 *				it for example, by re-trying the operation).
 * @HW_EVENT_ERR_DEFERRED:	Deferred Error - Indicates an uncorrectable
 *				error whose handling is not urgent. This could
 *				be due to hardware data poisoning where the
 *				system can continue operation until the poisoned
 *				data is consumed. Preemptive measures may also
 *				be taken, e.g. offlining pages, etc.
 * @HW_EVENT_ERR_FATAL:		Fatal Error - Uncorrected error that could not
 *				be recovered.
 * @HW_EVENT_ERR_INFO:		Informational - The CPER spec defines a forth
 *				type of error: informational logs.
 */
enum hw_event_mc_err_type {
	HW_EVENT_ERR_CORRECTED,
	HW_EVENT_ERR_UNCORRECTED,
	HW_EVENT_ERR_DEFERRED,
	HW_EVENT_ERR_FATAL,
	HW_EVENT_ERR_INFO,
};

static inline char *mc_event_error_type(const unsigned int err_type)
{
	switch (err_type) {
	case HW_EVENT_ERR_CORRECTED:
		return "Corrected";
	case HW_EVENT_ERR_UNCORRECTED:
		return "Uncorrected";
	case HW_EVENT_ERR_DEFERRED:
		return "Deferred";
	case HW_EVENT_ERR_FATAL:
		return "Fatal";
	default:
	case HW_EVENT_ERR_INFO:
		return "Info";
	}
}

/**
 * enum mem_type - memory types. For a more detailed reference, please see
 *			http://en.wikipedia.org/wiki/DRAM
 *
 * @MEM_EMPTY:		Empty csrow
 * @MEM_RESERVED:	Reserved csrow type
 * @MEM_UNKNOWN:	Unknown csrow type
 * @MEM_FPM:		FPM - Fast Page Mode, used on systems up to 1995.
 * @MEM_EDO:		EDO - Extended data out, used on systems up to 1998.
 * @MEM_BEDO:		BEDO - Burst Extended data out, an EDO variant.
 * @MEM_SDR:		SDR - Single data rate SDRAM
 *			http://en.wik