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