edac_mc.c revision 8096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6
1da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* 2da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * edac_mc kernel module 349c0dab7e6000888b616bedcbbc8cd4710331610Doug Thompson * (C) 2005, 2006 Linux Networx (http://lnxi.com) 4da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * This file may be distributed under the terms of the 5da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * GNU General Public License. 6da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 7da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Written by Thayne Harbaugh 8da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Based on work by Dan Hollis <goemon at anime dot net> and others. 9da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * http://www.anime.net/~goemon/linux-ecc/ 10da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 11da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Modified by Dave Peterson and Doug Thompson 12da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 13da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 14da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 15da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/module.h> 16da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/proc_fs.h> 17da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/kernel.h> 18da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/types.h> 19da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/smp.h> 20da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/init.h> 21da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/sysctl.h> 22da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/highmem.h> 23da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/timer.h> 24da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/slab.h> 25da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/jiffies.h> 26da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/spinlock.h> 27da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/list.h> 28da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/sysdev.h> 29da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <linux/ctype.h> 30c0d121720220584bba2876b032e58a076b843fa1Dave Jiang#include <linux/edac.h> 31da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <asm/uaccess.h> 32da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <asm/page.h> 33da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#include <asm/edac.h> 3420bcb7a81dee21bfa3408f03f46b2891c9b5c84bDouglas Thompson#include "edac_core.h" 357c9281d76c1c0b130f79d5fc021084e9749959d4Douglas Thompson#include "edac_module.h" 36da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 37da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* lock to memory controller's control array */ 3863b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlckestatic DEFINE_MUTEX(mem_ctls_mutex); 39da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Coxstatic struct list_head mc_devices = LIST_HEAD_INIT(mc_devices); 40da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 41da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#ifdef CONFIG_EDAC_DEBUG 42da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 432da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_dump_channel(struct channel_info *chan) 44da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 45da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tchannel = %p\n", chan); 46da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx); 47da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tchannel->ce_count = %d\n", chan->ce_count); 48da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tchannel->label = '%s'\n", chan->label); 49da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tchannel->csrow = %p\n\n", chan->csrow); 50da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 51da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 522da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_dump_csrow(struct csrow_info *csrow) 53da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 54da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tcsrow = %p\n", csrow); 55da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx); 56079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson debugf4("\tcsrow->first_page = 0x%lx\n", csrow->first_page); 57da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page); 58da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask); 59da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages); 60079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson debugf4("\tcsrow->nr_channels = %d\n", csrow->nr_channels); 61da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tcsrow->channels = %p\n", csrow->channels); 62da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tcsrow->mci = %p\n\n", csrow->mci); 63da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 64da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 652da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_dump_mci(struct mem_ctl_info *mci) 66da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 67da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf3("\tmci = %p\n", mci); 68da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap); 69da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); 70da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap); 71da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf4("\tmci->edac_check = %p\n", mci->edac_check); 72da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf3("\tmci->nr_csrows = %d, csrows = %p\n", 73da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->nr_csrows, mci->csrows); 7437f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompson debugf3("\tdev = %p\n", mci->dev); 75079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson debugf3("\tmod_name:ctl_name = %s:%s\n", mci->mod_name, mci->ctl_name); 76da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox debugf3("\tpvt_info = %p\n\n", mci->pvt_info); 77da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 78da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 79079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson#endif /* CONFIG_EDAC_DEBUG */ 80da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 81da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. 82da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Adjust 'ptr' so that its alignment is at least as stringent as what the 83da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * compiler would provide for X and return the aligned result. 84da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 85da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * If 'size' is a constant, the compiler will optimize this whole function 86da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * down to either a no-op or the addition of a constant to the value of 'ptr'. 87da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 887391c6dcab3094610cb99bbd559beaa282582eacDouglas Thompsonvoid *edac_align_ptr(void *ptr, unsigned size) 89da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 90da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned align, r; 91da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 92da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Here we assume that the alignment of a "long long" is the most 93da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * stringent alignment that the compiler will ever provide by default. 94da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * As far as I know, this is a reasonable assumption. 95da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 96da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (size > sizeof(long)) 97da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(long long); 98da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(int)) 99da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(long); 100da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(short)) 101da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(int); 102da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(char)) 103da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(short); 104da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else 105079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson return (char *)ptr; 106da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 107da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox r = size % align; 108da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 109da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (r == 0) 110079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson return (char *)ptr; 111da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 1127391c6dcab3094610cb99bbd559beaa282582eacDouglas Thompson return (void *)(((unsigned long)ptr) + align - r); 113da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 114da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 115da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 116da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * edac_mc_alloc: Allocate a struct mem_ctl_info structure 117da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @size_pvt: size of private storage needed 118da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @nr_csrows: Number of CWROWS needed for this MC 119da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @nr_chans: Number of channels for the MC 120da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 121da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Everything is kmalloc'ed as one big chunk - more efficient. 122da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Only can be used if all structures have the same lifetime - otherwise 123da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * you have to allocate and initialize your own structures. 124da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 125da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Use edac_mc_free() to free mc structures allocated by this function. 126da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 127da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Returns: 128da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * NULL allocation failed 129da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * struct mem_ctl_info pointer 130da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 131da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Coxstruct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, 132b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson unsigned nr_chans, int edac_index) 133da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 134da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *mci; 135da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct csrow_info *csi, *csrow; 136da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct channel_info *chi, *chp, *chan; 137da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox void *pvt; 138da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned size; 139da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int row, chn; 1408096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson int err; 141da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 142da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Figure out the offsets of the various items from the start of an mc 143da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * structure. We want the alignment of each item to be at least as 144da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * stringent as what the compiler would provide if we could simply 145da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * hardcode everything into a single struct. 146da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 147079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson mci = (struct mem_ctl_info *)0; 1487391c6dcab3094610cb99bbd559beaa282582eacDouglas Thompson csi = edac_align_ptr(&mci[1], sizeof(*csi)); 1497391c6dcab3094610cb99bbd559beaa282582eacDouglas Thompson chi = edac_align_ptr(&csi[nr_csrows], sizeof(*chi)); 150e27e3dac651771fe3250f6305dee277bce29fc5dDouglas Thompson pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt); 151079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson size = ((unsigned long)pvt) + sz_pvt; 152da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 1538096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson mci = kzalloc(size, GFP_KERNEL); 1548096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson if (mci == NULL) 155da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return NULL; 156da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 157da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Adjust pointers so they point within the memory we just allocated 158da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * rather than an imaginary chunk of memory located at address 0. 159da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 160079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson csi = (struct csrow_info *)(((char *)mci) + ((unsigned long)csi)); 161079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson chi = (struct channel_info *)(((char *)mci) + ((unsigned long)chi)); 162079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL; 163da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 164b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson /* setup index and various internal pointers */ 165b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson mci->mc_idx = edac_index; 166da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->csrows = csi; 167da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->pvt_info = pvt; 168da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->nr_csrows = nr_csrows; 169da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 170da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (row = 0; row < nr_csrows; row++) { 171da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox csrow = &csi[row]; 172da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox csrow->csrow_idx = row; 173da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox csrow->mci = mci; 174da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox csrow->nr_channels = nr_chans; 175da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chp = &chi[row * nr_chans]; 176da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox csrow->channels = chp; 177da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 178da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (chn = 0; chn < nr_chans; chn++) { 179da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chan = &chp[chn]; 180da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chan->chan_idx = chn; 181da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chan->csrow = csrow; 182da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 183da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 184da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 18581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_ALLOC; 18681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 1878096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson /* 1888096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * Initialize the 'root' kobj for the edac_mc controller 1898096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson */ 1908096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson err = edac_mc_register_sysfs_main_kobj(mci); 1918096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson if (err) { 1928096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson kfree(mci); 1938096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson return NULL; 1948096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson } 1958096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson 1968096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson /* at this point, the root kobj is valid, and in order to 1978096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * 'free' the object, then the function: 1988096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * edac_mc_unregister_sysfs_main_kobj() must be called 1998096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * which will perform kobj unregistration and the actual free 2008096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * will occur during the kobject callback operation 2018096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson */ 202da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return mci; 203da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 2049110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_alloc); 205da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 206da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 2078096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * edac_mc_free 2088096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * 'Free' a previously allocated 'mci' structure 209da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @mci: pointer to a struct mem_ctl_info structure 210da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 211da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Coxvoid edac_mc_free(struct mem_ctl_info *mci) 212da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 2138096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson edac_mc_unregister_sysfs_main_kobj(mci); 214da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 2159110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_free); 216da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 21737f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompsonstatic struct mem_ctl_info *find_mci_by_dev(struct device *dev) 218da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 219da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *mci; 220da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct list_head *item; 221da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 222537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf3("%s()\n", __func__); 223da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 224da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox list_for_each(item, &mc_devices) { 225da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci = list_entry(item, struct mem_ctl_info, link); 226da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 22737f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompson if (mci->dev == dev) 228da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return mci; 229da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 230da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 231da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return NULL; 232da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 233da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 23481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 23581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * handler for EDAC to check if NMI type handler has asserted interrupt 23681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 23781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangstatic int edac_mc_assert_error_check_and_clear(void) 23881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 23966ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang int old_state; 24081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 241079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson if (edac_op_state == EDAC_OPSTATE_POLL) 24281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang return 1; 24381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 24466ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang old_state = edac_err_assert; 24566ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang edac_err_assert = 0; 24681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 24766ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang return old_state; 24881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 24981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 25081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 25181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_function 25281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * performs the operation scheduled by a workq request 25381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 25481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangstatic void edac_mc_workq_function(struct work_struct *work_req) 25581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 256079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson struct delayed_work *d_work = (struct delayed_work *)work_req; 25781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work); 25881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 25981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_lock(&mem_ctls_mutex); 26081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 26181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* Only poll controllers that are running polled and have a check */ 26281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL)) 26381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->edac_check(mci); 26481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 26581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* 26681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * FIXME: temp place holder for PCI checks, 26781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * goes away when we break out PCI 26881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 26981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_pci_do_parity_check(); 27081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 27181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_unlock(&mem_ctls_mutex); 27281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 27381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* Reschedule */ 2744de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang queue_delayed_work(edac_workqueue, &mci->work, 275052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson msecs_to_jiffies(edac_mc_get_poll_msec())); 27681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 27781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 27881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 27981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_setup 28081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * initialize a workq item for this mci 28181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * passing in the new delay period in msec 28281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 28381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangvoid edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec) 28481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 28581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang debugf0("%s()\n", __func__); 28681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 28781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function); 28881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec)); 28981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 29081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 29181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 29281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_teardown 29381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * stop the workq processing on this mci 29481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 29581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangvoid edac_mc_workq_teardown(struct mem_ctl_info *mci) 29681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 29781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang int status; 29881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 29981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang status = cancel_delayed_work(&mci->work); 30081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang if (status == 0) { 30181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* workq instance might be running, wait for it */ 30281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang flush_workqueue(edac_workqueue); 30381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } 30481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 30581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 30681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 30781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_reset_delay_period 30881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 30981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 31081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangvoid edac_reset_delay_period(struct mem_ctl_info *mci, unsigned long value) 31181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 31281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_lock(&mem_ctls_mutex); 31381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 31481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* cancel the current workq request */ 31581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_mc_workq_teardown(mci); 31681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 31781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* restart the workq request, with new delay value */ 31881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_mc_workq_setup(mci, value); 31981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 32081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_unlock(&mem_ctls_mutex); 32181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 32281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 3232d7bbb91c8df26c60d223205a087507430024177Doug Thompson/* Return 0 on success, 1 on failure. 3242d7bbb91c8df26c60d223205a087507430024177Doug Thompson * Before calling this function, caller must 3252d7bbb91c8df26c60d223205a087507430024177Doug Thompson * assign a unique value to mci->mc_idx. 3262d7bbb91c8df26c60d223205a087507430024177Doug Thompson */ 327079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstatic int add_mc_to_global_list(struct mem_ctl_info *mci) 328da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 329da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct list_head *item, *insert_before; 330da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *p; 331da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 3322d7bbb91c8df26c60d223205a087507430024177Doug Thompson insert_before = &mc_devices; 333da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 3342d7bbb91c8df26c60d223205a087507430024177Doug Thompson if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL)) 3352d7bbb91c8df26c60d223205a087507430024177Doug Thompson goto fail0; 336da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 3372d7bbb91c8df26c60d223205a087507430024177Doug Thompson list_for_each(item, &mc_devices) { 3382d7bbb91c8df26c60d223205a087507430024177Doug Thompson p = list_entry(item, struct mem_ctl_info, link); 339da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 3402d7bbb91c8df26c60d223205a087507430024177Doug Thompson if (p->mc_idx >= mci->mc_idx) { 3412d7bbb91c8df26c60d223205a087507430024177Doug Thompson if (unlikely(p->mc_idx == mci->mc_idx)) 3422d7bbb91c8df26c60d223205a087507430024177Doug Thompson goto fail1; 343da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 3442d7bbb91c8df26c60d223205a087507430024177Doug Thompson insert_before = item; 3452d7bbb91c8df26c60d223205a087507430024177Doug Thompson break; 346da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 347da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 348da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 349da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox list_add_tail_rcu(&mci->link, insert_before); 350c0d121720220584bba2876b032e58a076b843fa1Dave Jiang atomic_inc(&edac_handlers); 351da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return 0; 3522d7bbb91c8df26c60d223205a087507430024177Doug Thompson 353052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 3542d7bbb91c8df26c60d223205a087507430024177Doug Thompson edac_printk(KERN_WARNING, EDAC_MC, 355052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "%s (%s) %s %s already assigned %d\n", p->dev->bus_id, 356052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx); 3572d7bbb91c8df26c60d223205a087507430024177Doug Thompson return 1; 3582d7bbb91c8df26c60d223205a087507430024177Doug Thompson 359052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 3602d7bbb91c8df26c60d223205a087507430024177Doug Thompson edac_printk(KERN_WARNING, EDAC_MC, 361052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "bug in low-level driver: attempt to assign\n" 362052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); 3632d7bbb91c8df26c60d223205a087507430024177Doug Thompson return 1; 364da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 365da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 366e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonstatic void complete_mc_list_del(struct rcu_head *head) 367a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson{ 368a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson struct mem_ctl_info *mci; 369a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson 370a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson mci = container_of(head, struct mem_ctl_info, rcu); 371a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson INIT_LIST_HEAD(&mci->link); 372a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson complete(&mci->complete); 373a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson} 374a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson 375e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonstatic void del_mc_from_global_list(struct mem_ctl_info *mci) 376a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson{ 377c0d121720220584bba2876b032e58a076b843fa1Dave Jiang atomic_dec(&edac_handlers); 378a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson list_del_rcu(&mci->link); 379a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson init_completion(&mci->complete); 380a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson call_rcu(&mci->rcu, complete_mc_list_del); 381a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson wait_for_completion(&mci->complete); 382a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson} 383a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson 384da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 3855da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'. 3865da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * 3875da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * If found, return a pointer to the structure. 3885da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * Else return NULL. 3895da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * 3905da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * Caller must hold mem_ctls_mutex. 3915da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson */ 392079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct mem_ctl_info *edac_mc_find(int idx) 3935da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson{ 3945da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson struct list_head *item; 3955da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson struct mem_ctl_info *mci; 3965da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 3975da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson list_for_each(item, &mc_devices) { 3985da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson mci = list_entry(item, struct mem_ctl_info, link); 3995da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 4005da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson if (mci->mc_idx >= idx) { 4015da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson if (mci->mc_idx == idx) 4025da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson return mci; 4035da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 4045da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson break; 4055da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson } 4065da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson } 4075da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 4085da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson return NULL; 4095da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson} 4105da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas ThompsonEXPORT_SYMBOL(edac_mc_find); 4115da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 4125da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson/** 413472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and 414472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * create sysfs entries associated with mci structure 415da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @mci: pointer to the mci structure to be added to the list 4162d7bbb91c8df26c60d223205a087507430024177Doug Thompson * @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure. 417da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 418da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Return: 419da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 0 Success 420da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * !0 Failure 421da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 422da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 423da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - should a warning be printed if no error detection? correction? */ 424b8f6f9755248026f21282e25cac49a1af698056cDoug Thompsonint edac_mc_add_mc(struct mem_ctl_info *mci) 425da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 426537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf0("%s()\n", __func__); 427b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson 428da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#ifdef CONFIG_EDAC_DEBUG 429da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (edac_debug_level >= 3) 430da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_dump_mci(mci); 431e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 432da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (edac_debug_level >= 4) { 433da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int i; 434da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 435da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (i = 0; i < mci->nr_csrows; i++) { 436da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int j; 437e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 438da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_dump_csrow(&mci->csrows[i]); 439da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (j = 0; j < mci->csrows[i].nr_channels; j++) 440079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson edac_mc_dump_channel(&mci->csrows[i]. 441052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson channels[j]); 442da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 443da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 444da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#endif 44563b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_lock(&mem_ctls_mutex); 446da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 447da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (add_mc_to_global_list(mci)) 448028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson goto fail0; 449da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 450da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* set load time so that error rate can be tracked */ 451da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->start_time = jiffies; 452da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 4539794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (edac_create_sysfs_mci_device(mci)) { 4549794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_WARNING, 455052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "failed to create sysfs device\n"); 4569794f33ddedd878dd92fcf8b4834391840366919eric wollesen goto fail1; 4579794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 458da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 45981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* If there IS a check routine, then we are running POLLED */ 46081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang if (mci->edac_check != NULL) { 46181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* This instance is NOW RUNNING */ 46281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_RUNNING_POLL; 46381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 46481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_mc_workq_setup(mci, edac_mc_get_poll_msec()); 46581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } else { 46681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_RUNNING_INTERRUPT; 46781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } 46881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 469da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Report action taken */ 47037f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompson edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n", 471052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->mod_name, mci->ctl_name, dev_name(mci)); 472da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 47363b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 474028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson return 0; 475da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 476052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 477028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson del_mc_from_global_list(mci); 478028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson 479052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 48063b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 481028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson return 1; 482da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 4839110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_add_mc); 484da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 485da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 486472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * edac_mc_del_mc: Remove sysfs entries for specified mci structure and 487472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * remove mci structure from global list 48837f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompson * @pdev: Pointer to 'struct device' representing mci structure to remove. 489da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 49018dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson * Return pointer to removed mci structure, or NULL if device not found. 491da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 492079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct mem_ctl_info *edac_mc_del_mc(struct device *dev) 493da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 49418dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson struct mem_ctl_info *mci; 495da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 49618dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson debugf0("MC: %s()\n", __func__); 49763b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_lock(&mem_ctls_mutex); 49818dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson 49937f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompson if ((mci = find_mci_by_dev(dev)) == NULL) { 50063b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 50118dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson return NULL; 50218dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson } 50318dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson 50481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* marking MCI offline */ 50581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_OFFLINE; 50681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 50781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* flush workq processes */ 50881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_mc_workq_teardown(mci); 50981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 51018dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson edac_remove_sysfs_mci_device(mci); 511da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox del_mc_from_global_list(mci); 51263b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 513537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_printk(KERN_INFO, EDAC_MC, 514052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, 515052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->mod_name, mci->ctl_name, dev_name(mci)); 51618dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson return mci; 517da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 5189110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_del_mc); 519da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 5202da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_scrub_block(unsigned long page, unsigned long offset, 5212da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunk u32 size) 522da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 523da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct page *pg; 524da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox void *virt_addr; 525da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned long flags = 0; 526da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 527537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf3("%s()\n", __func__); 528da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 529da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* ECC error page was not in our memory. Ignore it. */ 530079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson if (!pfn_valid(page)) 531da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 532da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 533da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Find the actual page structure then map it and fix */ 534da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox pg = pfn_to_page(page); 535da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 536da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (PageHighMem(pg)) 537da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox local_irq_save(flags); 538da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 539da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox virt_addr = kmap_atomic(pg, KM_BOUNCE_READ); 540da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 541da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Perform architecture specific atomic scrub operation */ 542da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox atomic_scrub(virt_addr + offset, size); 543da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 544da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Unmap and complete */ 545da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox kunmap_atomic(virt_addr, KM_BOUNCE_READ); 546da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 547da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (PageHighMem(pg)) 548da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox local_irq_restore(flags); 549da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 550da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 551da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - should return -1 */ 552e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonint edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) 553da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 554da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct csrow_info *csrows = mci->csrows; 555da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int row, i; 556da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 557537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page); 558da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox row = -1; 559da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 560da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (i = 0; i < mci->nr_csrows; i++) { 561da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct csrow_info *csrow = &csrows[i]; 562da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 563da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (csrow->nr_pages == 0) 564da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox continue; 565da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 566537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) " 567537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson "mask(0x%lx)\n", mci->mc_idx, __func__, 568537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson csrow->first_page, page, csrow->last_page, 569537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson csrow->page_mask); 570da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 571da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if ((page >= csrow->first_page) && 572da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox (page <= csrow->last_page) && 573da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox ((page & csrow->page_mask) == 574da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox (csrow->first_page & csrow->page_mask))) { 575da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox row = i; 576da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox break; 577da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 578da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 579da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 580da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (row == -1) 581537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_ERR, 582052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "could not look up page error address %lx\n", 583052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson (unsigned long)page); 584da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 585da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return row; 586da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 5879110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); 588da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 589da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - setable log (warning/emerg) levels */ 590da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */ 591da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Coxvoid edac_mc_handle_ce(struct mem_ctl_info *mci, 592052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned long page_frame_number, 593052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned long offset_in_page, unsigned long syndrome, 594052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson int row, int channel, const char *msg) 595da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 596da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned long remapped_page; 597da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 598537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf3("MC%d: %s()\n", mci->mc_idx, __func__); 599da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 600da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* FIXME - maybe make panic on INTERNAL ERROR an option */ 601da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (row >= mci->nr_csrows || row < 0) { 602da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* something is wrong */ 603537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_ERR, 604052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: row out of range " 605052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "(%d >= %d)\n", row, mci->nr_csrows); 606da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); 607da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 608da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 609e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 610da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (channel >= mci->csrows[row].nr_channels || channel < 0) { 611da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* something is wrong */ 612537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_ERR, 613052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: channel out of range " 614052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "(%d >= %d)\n", channel, 615052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->csrows[row].nr_channels); 616da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); 617da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 618da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 619da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6204de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_log_ce()) 621da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* FIXME - put in DIMM location */ 622537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_WARNING, 623052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "CE page 0x%lx, offset 0x%lx, grain %d, syndrome " 624052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "0x%lx, row %d, channel %d, label \"%s\": %s\n", 625052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson page_frame_number, offset_in_page, 626052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->csrows[row].grain, syndrome, row, channel, 627052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->csrows[row].channels[channel].label, msg); 628da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 629da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->ce_count++; 630da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->csrows[row].ce_count++; 631da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->csrows[row].channels[channel].ce_count++; 632da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 633da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (mci->scrub_mode & SCRUB_SW_SRC) { 634da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* 635da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Some MC's can remap memory so that it is still available 636da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * at a different address when PCI devices map into memory. 637da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * MC's that can't do this lose the memory where PCI devices 638da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * are mapped. This mapping is MC dependant and so we call 639da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * back into the MC driver for it to map the MC page to 640da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * a physical (CPU) page which can then be mapped to a virtual 641da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * page - which can then be scrubbed. 642da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 643da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox remapped_page = mci->ctl_page_to_phys ? 644052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->ctl_page_to_phys(mci, page_frame_number) : 645052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson page_frame_number; 646da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 647da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_scrub_block(remapped_page, offset_in_page, 648052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->csrows[row].grain); 649da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 650da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 6519110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_handle_ce); 652da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 653e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonvoid edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg) 654da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 6554de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_log_ce()) 656537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_WARNING, 657052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "CE - no information available: %s\n", msg); 658e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 659da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->ce_noinfo_count++; 660da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->ce_count++; 661da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 6629110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info); 663da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 664da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Coxvoid edac_mc_handle_ue(struct mem_ctl_info *mci, 665052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned long page_frame_number, 666052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned long offset_in_page, int row, const char *msg) 667da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 668da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int len = EDAC_MC_LABEL_LEN * 4; 669da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox char labels[len + 1]; 670da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox char *pos = labels; 671da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int chan; 672da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int chars; 673da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 674537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf3("MC%d: %s()\n", mci->mc_idx, __func__); 675da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 676da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* FIXME - maybe make panic on INTERNAL ERROR an option */ 677da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (row >= mci->nr_csrows || row < 0) { 678da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* something is wrong */ 679537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_ERR, 680052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: row out of range " 681052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "(%d >= %d)\n", row, mci->nr_csrows); 682da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); 683da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 684da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 685da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 686da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chars = snprintf(pos, len + 1, "%s", 687079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson mci->csrows[row].channels[0].label); 688da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox len -= chars; 689da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox pos += chars; 690e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 691da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0); 692052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson chan++) { 693da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chars = snprintf(pos, len + 1, ":%s", 694079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson mci->csrows[row].channels[chan].label); 695da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox len -= chars; 696da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox pos += chars; 697da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 698da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6994de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_log_ue()) 700537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_EMERG, 701052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "UE page 0x%lx, offset 0x%lx, grain %d, row %d, " 702052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "labels \"%s\": %s\n", page_frame_number, 703052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson offset_in_page, mci->csrows[row].grain, row, 704052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson labels, msg); 705da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 7064de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_panic_on_ue()) 707e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, " 708052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "row %d, labels \"%s\": %s\n", mci->mc_idx, 709052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson page_frame_number, offset_in_page, 710052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->csrows[row].grain, row, labels, msg); 711da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 712da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->ue_count++; 713da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->csrows[row].ue_count++; 714da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 7159110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_handle_ue); 716da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 717e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonvoid edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg) 718da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 7194de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_panic_on_ue()) 720da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox panic("EDAC MC%d: Uncorrected Error", mci->mc_idx); 721da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 7224de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_log_ue()) 723537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_WARNING, 724052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "UE - no information available: %s\n", msg); 725da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->ue_noinfo_count++; 726da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->ue_count++; 727da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 728079708b9173595bf74b31b14c36e946359ae6c7eDouglas ThompsonEXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info); 729da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 7309794f33ddedd878dd92fcf8b4834391840366919eric wollesen/************************************************************* 7319794f33ddedd878dd92fcf8b4834391840366919eric wollesen * On Fully Buffered DIMM modules, this help function is 7329794f33ddedd878dd92fcf8b4834391840366919eric wollesen * called to process UE events 7339794f33ddedd878dd92fcf8b4834391840366919eric wollesen */ 7349794f33ddedd878dd92fcf8b4834391840366919eric wollesenvoid edac_mc_handle_fbd_ue(struct mem_ctl_info *mci, 735052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned int csrow, 736052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned int channela, 737052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned int channelb, char *msg) 7389794f33ddedd878dd92fcf8b4834391840366919eric wollesen{ 7399794f33ddedd878dd92fcf8b4834391840366919eric wollesen int len = EDAC_MC_LABEL_LEN * 4; 7409794f33ddedd878dd92fcf8b4834391840366919eric wollesen char labels[len + 1]; 7419794f33ddedd878dd92fcf8b4834391840366919eric wollesen char *pos = labels; 7429794f33ddedd878dd92fcf8b4834391840366919eric wollesen int chars; 7439794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7449794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (csrow >= mci->nr_csrows) { 7459794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* something is wrong */ 7469794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_ERR, 747052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: row out of range (%d >= %d)\n", 748052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson csrow, mci->nr_csrows); 7499794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); 7509794f33ddedd878dd92fcf8b4834391840366919eric wollesen return; 7519794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 7529794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7539794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (channela >= mci->csrows[csrow].nr_channels) { 7549794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* something is wrong */ 7559794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_ERR, 756052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: channel-a out of range " 757052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "(%d >= %d)\n", 758052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson channela, mci->csrows[csrow].nr_channels); 7599794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); 7609794f33ddedd878dd92fcf8b4834391840366919eric wollesen return; 7619794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 7629794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7639794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (channelb >= mci->csrows[csrow].nr_channels) { 7649794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* something is wrong */ 7659794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_ERR, 766052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: channel-b out of range " 767052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "(%d >= %d)\n", 768052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson channelb, mci->csrows[csrow].nr_channels); 7699794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR"); 7709794f33ddedd878dd92fcf8b4834391840366919eric wollesen return; 7719794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 7729794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7739794f33ddedd878dd92fcf8b4834391840366919eric wollesen mci->ue_count++; 7749794f33ddedd878dd92fcf8b4834391840366919eric wollesen mci->csrows[csrow].ue_count++; 7759794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7769794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* Generate the DIMM labels from the specified channels */ 7779794f33ddedd878dd92fcf8b4834391840366919eric wollesen chars = snprintf(pos, len + 1, "%s", 7789794f33ddedd878dd92fcf8b4834391840366919eric wollesen mci->csrows[csrow].channels[channela].label); 779079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson len -= chars; 780079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson pos += chars; 7819794f33ddedd878dd92fcf8b4834391840366919eric wollesen chars = snprintf(pos, len + 1, "-%s", 7829794f33ddedd878dd92fcf8b4834391840366919eric wollesen mci->csrows[csrow].channels[channelb].label); 7839794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7844de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_log_ue()) 7859794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_EMERG, 786052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "UE row %d, channel-a= %d channel-b= %d " 787052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "labels \"%s\": %s\n", csrow, channela, channelb, 788052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson labels, msg); 7899794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7904de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_panic_on_ue()) 7919794f33ddedd878dd92fcf8b4834391840366919eric wollesen panic("UE row %d, channel-a= %d channel-b= %d " 792052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "labels \"%s\": %s\n", csrow, channela, 793052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson channelb, labels, msg); 7949794f33ddedd878dd92fcf8b4834391840366919eric wollesen} 7959794f33ddedd878dd92fcf8b4834391840366919eric wollesenEXPORT_SYMBOL(edac_mc_handle_fbd_ue); 7969794f33ddedd878dd92fcf8b4834391840366919eric wollesen 7979794f33ddedd878dd92fcf8b4834391840366919eric wollesen/************************************************************* 7989794f33ddedd878dd92fcf8b4834391840366919eric wollesen * On Fully Buffered DIMM modules, this help function is 7999794f33ddedd878dd92fcf8b4834391840366919eric wollesen * called to process CE events 8009794f33ddedd878dd92fcf8b4834391840366919eric wollesen */ 8019794f33ddedd878dd92fcf8b4834391840366919eric wollesenvoid edac_mc_handle_fbd_ce(struct mem_ctl_info *mci, 802052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson unsigned int csrow, unsigned int channel, char *msg) 8039794f33ddedd878dd92fcf8b4834391840366919eric wollesen{ 8049794f33ddedd878dd92fcf8b4834391840366919eric wollesen 8059794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* Ensure boundary values */ 8069794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (csrow >= mci->nr_csrows) { 8079794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* something is wrong */ 8089794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_ERR, 809052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: row out of range (%d >= %d)\n", 810052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson csrow, mci->nr_csrows); 8119794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); 8129794f33ddedd878dd92fcf8b4834391840366919eric wollesen return; 8139794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 8149794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (channel >= mci->csrows[csrow].nr_channels) { 8159794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* something is wrong */ 8169794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_ERR, 817052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "INTERNAL ERROR: channel out of range (%d >= %d)\n", 818052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson channel, mci->csrows[csrow].nr_channels); 8199794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR"); 8209794f33ddedd878dd92fcf8b4834391840366919eric wollesen return; 8219794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 8229794f33ddedd878dd92fcf8b4834391840366919eric wollesen 8234de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang if (edac_mc_get_log_ce()) 8249794f33ddedd878dd92fcf8b4834391840366919eric wollesen /* FIXME - put in DIMM location */ 8259794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_WARNING, 826052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "CE row %d, channel %d, label \"%s\": %s\n", 827052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson csrow, channel, 828052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->csrows[csrow].channels[channel].label, msg); 8299794f33ddedd878dd92fcf8b4834391840366919eric wollesen 8309794f33ddedd878dd92fcf8b4834391840366919eric wollesen mci->ce_count++; 8319794f33ddedd878dd92fcf8b4834391840366919eric wollesen mci->csrows[csrow].ce_count++; 8329794f33ddedd878dd92fcf8b4834391840366919eric wollesen mci->csrows[csrow].channels[channel].ce_count++; 8339794f33ddedd878dd92fcf8b4834391840366919eric wollesen} 834079708b9173595bf74b31b14c36e946359ae6c7eDouglas ThompsonEXPORT_SYMBOL(edac_mc_handle_fbd_ce); 8359794f33ddedd878dd92fcf8b4834391840366919eric wollesen 836da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* 837da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Iterate over all MC instances and check for ECC, et al, errors 838da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 8397c9281d76c1c0b130f79d5fc021084e9749959d4Douglas Thompsonvoid edac_check_mc_devices(void) 840da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 841da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct list_head *item; 842da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *mci; 843da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 844537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson debugf3("%s()\n", __func__); 84563b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_lock(&mem_ctls_mutex); 846da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 847da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox list_for_each(item, &mc_devices) { 848da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci = list_entry(item, struct mem_ctl_info, link); 849da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 850da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (mci->edac_check != NULL) 851da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->edac_check(mci); 852da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 853da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 85463b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 855da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 856