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/*
* 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 mc_num,
unsigned n_layers,
struct edac_mc_layer *layers,
unsigned 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.
*
* @type: severity of the error (CE/UE/Fatal)
* @mci: a struct mem_ctl_info pointer
* @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(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
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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