/*
* edac_mc kernel module
* (C) 2005, 2006 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/
*
* Modified by Dave Peterson and Doug Thompson
*
*/
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/highmem.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/ctype.h>
#include <linux/edac.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/edac.h>
#include "edac_core.h"
#include "edac_module.h"
#define CREATE_TRACE_POINTS
#define TRACE_INCLUDE_PATH ../../include/ras
#include <ras/ras_event.h>
/* lock to memory controller's control array */
static DEFINE_MUTEX(mem_ctls_mutex);
static LIST_HEAD(mc_devices);
/*
* Used to lock EDAC MC to just one module, avoiding two drivers e. g.
* apei/ghes and i7core_edac to be used at the same time.
*/
static void const *edac_mc_owner;
static struct bus_type mc_bus[EDAC_MAX_MCS];
unsigned edac_dimm_info_location(struct dimm_info *dimm, char *buf,
unsigned len)
{
struct mem_ctl_info *mci = dimm->mci;
int i, n, count = 0;
char *p = buf;
for (i = 0; i < mci->n_layers; i++) {
n = snprintf(p, len, "%s %d ",
edac_layer_name[mci->layers[i].type],
dimm->location[i]);
p += n;
len -= n;
count += n;
if (!len)
break;
}
return count;
}
#ifdef CONFIG_EDAC_DEBUG
static void edac_mc_dump_channel(struct rank_info *chan)
{
edac_dbg(4, " channel->chan_idx = %d\n", chan->chan_idx);
edac_dbg(4, " channel = %p\n", chan);
edac_dbg(4, " channel->csrow = %p\n", chan->csrow);
edac_dbg(4, " channel->dimm = %p\n", chan->dimm);
}
static void edac_mc_dump_dimm(struct dimm_info *dimm, int number)
{
char location[80];
edac_dimm_info_location(dimm, location, sizeof(location));
edac_dbg(4, "%s%i: %smapped as virtual row %d, chan %d\n"