/*
* Defines , structures , APIs for edac_mc module
*
* ( C ) 2007 Linux Networx ( http : //lnxi.com)
* This file may be distributed under the terms of the
* GNU General Public License .
*
* Written by Thayne Harbaugh
* Based on work by Dan Hollis < goemon at anime dot net > and others .
* http : //www.anime.net/~goemon/linux-ecc/
*
* NMI handling support added by
* Dave Peterson < dsp @ llnl . gov > < dave_peterson @ pobox . com >
*
* Refactored for multi - source files :
* Doug Thompson < norsk5 @ xmission . com >
*
* Please look at Documentation / driver - api / edac . rst for more info about
* EDAC core structs and functions .
*/
#ifndef _EDAC_MC_H_
#define _EDAC_MC_H_
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/nmi.h>
#include <linux/rcupdate.h>
#include <linux/completion.h>
#include <linux/kobject.h>
#include <linux/platform_device.h>
#include <linux/workqueue.h>
#include <linux/edac.h>
#if PAGE_SHIFT < 20
#define PAGES_TO_MiB(pages) ((pages) >> (20 - PAGE_SHIFT))
#define MiB_TO_PAGES(mb) ((mb) << (20 - PAGE_SHIFT))
#else /* PAGE_SHIFT > 20 */
#define PAGES_TO_MiB(pages) ((pages) << (PAGE_SHIFT - 20 ))
#define MiB_TO_PAGES(mb) ((mb) >> (PAGE_SHIFT - 20 ))
#endif
#define edac_printk(level, prefix, fmt, arg...) \
printk(level "EDAC " prefix ": " fmt, ## arg)
#define edac_mc_printk(mci, level, fmt, arg...) \
printk(level "EDAC MC%d: " fmt, mci->mc_idx, ## arg)
#define edac_mc_chipset_printk(mci, level, prefix, fmt, arg...) \
printk(level "EDAC " prefix " MC%d: " fmt, mci->mc_idx, ## arg)
#define edac_device_printk(ctl, level, fmt, arg...) \
printk(level "EDAC DEVICE%d: " fmt, ctl->dev_idx, ## arg)
#define edac_pci_printk(ctl, level, fmt, arg...) \
printk(level "EDAC PCI%d: " fmt, ctl->pci_idx, ## arg)
/* prefixes for edac_printk() and edac_mc_printk() */
#define EDAC_MC "MC"
#define EDAC_PCI "PCI"
#define EDAC_DEBUG "DEBUG"
extern const char * const edac_mem_types[];
#ifdef CONFIG_EDAC_DEBUG
extern int edac_debug_level;
#define edac_dbg(level, fmt, ...) \
do { \
if (level <= edac_debug_level) \
edac_printk(KERN_DEBUG, EDAC_DEBUG, \
"%s: " fmt, __func__, ## __VA_ARGS__); \
} while (0 )
#else /* !CONFIG_EDAC_DEBUG */
#define edac_dbg(level, fmt, ...) \
do { \
if (0 ) \
edac_printk(KERN_DEBUG, EDAC_DEBUG, \
"%s: " fmt, __func__, ## __VA_ARGS__); \
} while (0 )
#endif /* !CONFIG_EDAC_DEBUG */
#define PCI_VEND_DEV(vend, dev) PCI_VENDOR_ID_ ## vend, \
PCI_DEVICE_ID_ ## vend ## _ ## dev
#define edac_dev_name(dev) (dev)->dev_name
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
/**
* edac_mc_alloc ( ) - Allocate and partially fill a struct & mem_ctl_info .
*
* @ mc_num : Memory controller number
* @ n_layers : Number of MC hierarchy layers
* @ layers : Describes each layer as seen by the Memory Controller
* @ sz_pvt : size of private storage needed
*
*
* Everything is kmalloc ' ed as one big chunk - more efficient .
* Only can be used if all structures have the same lifetime - otherwise
* you have to allocate and initialize your own structures .
*
* Use edac_mc_free ( ) to free mc structures allocated by this function .
*
* . . note : :
*
* drivers handle multi - rank memories in different ways : in some
* drivers , one multi - rank memory stick is mapped as one entry , while , in
* others , a single multi - rank memory stick would be mapped into several
* entries . Currently , this function will allocate multiple struct dimm_info
* on such scenarios , as grouping the multiple ranks require drivers change .
*
* Returns :
* On success , return a pointer to struct mem_ctl_info pointer ;
* % NULL otherwise
*/
struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
unsigned int n_layers,
struct edac_mc_layer *layers,
unsigned int sz_pvt);
/**
* edac_get_owner - Return the owner ' s mod_name of EDAC MC
*
* Returns :
* Pointer to mod_name string when EDAC MC is owned . NULL otherwise .
*/
extern const char *edac_get_owner(void );
/*
* edac_mc_add_mc_with_groups ( ) - Insert the @ mci structure into the mci
* global list and create sysfs entries associated with @ mci structure .
*
* @ mci : pointer to the mci structure to be added to the list
* @ groups : optional attribute groups for the driver - specific sysfs entries
*
* Returns :
* 0 on Success , or an error code on failure
*/
extern int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
const struct attribute_group **groups);
#define edac_mc_add_mc(mci) edac_mc_add_mc_with_groups(mci, NULL)
/**
* edac_mc_free ( ) - Frees a previously allocated @ mci structure
*
* @ mci : pointer to a struct mem_ctl_info structure
*/
extern void edac_mc_free(struct mem_ctl_info *mci);
/**
* edac_has_mcs ( ) - Check if any MCs have been allocated .
*
* Returns :
* True if MC instances have been registered successfully .
* False otherwise .
*/
extern bool edac_has_mcs(void );
/**
* edac_mc_find ( ) - Search for a mem_ctl_info structure whose index is @ idx .
*
* @ idx : index to be seek
*
* If found , return a pointer to the structure .
* Else return NULL .
*/
extern struct mem_ctl_info *edac_mc_find(int idx);
/**
* find_mci_by_dev ( ) - Scan list of controllers looking for the one that
* manages the @ dev device .
*
* @ dev : pointer to a struct device related with the MCI
*
* Returns : on success , returns a pointer to struct & mem_ctl_info ;
* % NULL otherwise .
*/
extern struct mem_ctl_info *find_mci_by_dev(struct device *dev);
/**
* edac_mc_del_mc ( ) - Remove sysfs entries for mci structure associated with
* @ dev and remove mci structure from global list .
*
* @ dev : Pointer to struct & device representing mci structure to remove .
*
* Returns : pointer to removed mci structure , or % NULL if device not found .
*/
extern struct mem_ctl_info *edac_mc_del_mc(struct device *dev);
/**
* edac_mc_find_csrow_by_page ( ) - Ancillary routine to identify what csrow
* contains a memory page .
*
* @ mci : pointer to a struct mem_ctl_info structure
* @ page : memory page to find
*
* Returns : on success , returns the csrow . - 1 if not found .
*/
extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
unsigned long page);
/**
* edac_raw_mc_handle_error ( ) - Reports a memory event to userspace without
* doing anything to discover the error location .
*
* @ e : error description
*
* This raw function is used internally by edac_mc_handle_error ( ) . It should
* only be called directly when the hardware error come directly from BIOS ,
* like in the case of APEI GHES driver .
*/
void edac_raw_mc_handle_error(struct edac_raw_error_desc *e);
/**
* edac_mc_handle_error ( ) - Reports a memory event to userspace .
*
* @ type : severity of the error ( CE / UE / Fatal )
* @ mci : a struct mem_ctl_info pointer
* @ error_count : Number of errors of the same type
* @ page_frame_number : mem page where the error occurred
* @ offset_in_page : offset of the error inside the page
* @ syndrome : ECC syndrome
* @ top_layer : Memory layer [ 0 ] position
* @ mid_layer : Memory layer [ 1 ] position
* @ low_layer : Memory layer [ 2 ] position
* @ msg : Message meaningful to the end users that
* explains the event
* @ other_detail : Technical details about the event that
* may help hardware manufacturers and
* EDAC developers to analyse the event
*/
void edac_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
const u16 error_count,
const unsigned long page_frame_number,
const unsigned long offset_in_page,
const unsigned long syndrome,
const int top_layer,
const int mid_layer,
const int low_layer,
const char *msg,
const char *other_detail);
/*
* edac misc APIs
*/
extern char *edac_op_state_to_string(int op_state);
#endif /* _EDAC_MC_H_ */
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