edac_mc.c revision 9eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7
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/ctype.h> 29c0d121720220584bba2876b032e58a076b843fa1Dave Jiang#include <linux/edac.h> 3053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#include <linux/bitops.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 3753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#define CREATE_TRACE_POINTS 3853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#define TRACE_INCLUDE_PATH ../../include/ras 3953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab#include <ras/ras_event.h> 4053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 41da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* lock to memory controller's control array */ 4263b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlckestatic DEFINE_MUTEX(mem_ctls_mutex); 43ff6ac2a616c85d1215899ffda815e29b699cbd3aRobert P. J. Daystatic LIST_HEAD(mc_devices); 44da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 456e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehabunsigned edac_dimm_info_location(struct dimm_info *dimm, char *buf, 466e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab unsigned len) 476e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab{ 486e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab struct mem_ctl_info *mci = dimm->mci; 496e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab int i, n, count = 0; 506e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab char *p = buf; 516e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab 526e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 536e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab n = snprintf(p, len, "%s %d ", 546e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_layer_name[mci->layers[i].type], 556e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab dimm->location[i]); 566e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab p += n; 576e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab len -= n; 586e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab count += n; 596e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab if (!len) 606e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab break; 616e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab } 626e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab 636e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab return count; 646e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab} 656e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab 66da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#ifdef CONFIG_EDAC_DEBUG 67da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 68a4b4be3fd7a76021f67380b03d8bccebf067db72Mauro Carvalho Chehabstatic void edac_mc_dump_channel(struct rank_info *chan) 69da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 706e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " channel->chan_idx = %d\n", chan->chan_idx); 716e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " channel = %p\n", chan); 726e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " channel->csrow = %p\n", chan->csrow); 736e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " channel->dimm = %p\n", chan->dimm); 744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 766e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehabstatic void edac_mc_dump_dimm(struct dimm_info *dimm, int number) 774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab{ 786e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab char location[80]; 796e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab 806e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dimm_info_location(dimm, location, sizeof(location)); 816e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab 826e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, "%s%i: %smapped as virtual row %d, chan %d\n", 836e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab dimm->mci->mem_is_per_rank ? "rank" : "dimm", 846e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab number, location, dimm->csrow, dimm->cschannel); 856e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " dimm = %p\n", dimm); 866e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " dimm->label = '%s'\n", dimm->label); 876e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " dimm->nr_pages = 0x%x\n", dimm->nr_pages); 886e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " dimm->grain = %d\n", dimm->grain); 896e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " dimm->nr_pages = 0x%x\n", dimm->nr_pages); 90da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 91da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 922da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_dump_csrow(struct csrow_info *csrow) 93da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 946e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, "csrow->csrow_idx = %d\n", csrow->csrow_idx); 956e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " csrow = %p\n", csrow); 966e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " csrow->first_page = 0x%lx\n", csrow->first_page); 976e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " csrow->last_page = 0x%lx\n", csrow->last_page); 986e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " csrow->page_mask = 0x%lx\n", csrow->page_mask); 996e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " csrow->nr_channels = %d\n", csrow->nr_channels); 1006e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " csrow->channels = %p\n", csrow->channels); 1016e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_dbg(4, " csrow->mci = %p\n", csrow->mci); 102da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 103da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 1042da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_dump_mci(struct mem_ctl_info *mci) 105da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 106956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci = %p\n", mci); 107956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->mtype_cap = %lx\n", mci->mtype_cap); 108956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap); 109956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->edac_cap = %lx\n", mci->edac_cap); 110956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "\tmci->edac_check = %p\n", mci->edac_check); 111956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->nr_csrows = %d, csrows = %p\n", 112956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->nr_csrows, mci->csrows); 113956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmci->nr_dimms = %d, dimms = %p\n", 114956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->tot_dimms, mci->dimms); 115956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tdev = %p\n", mci->pdev); 116956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tmod_name:ctl_name = %s:%s\n", 117956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->mod_name, mci->ctl_name); 118956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\tpvt_info = %p\n\n", mci->pvt_info); 119da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 120da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 12124f9a7fe3f19f3fd310f556364d01a22911724b3Borislav Petkov#endif /* CONFIG_EDAC_DEBUG */ 12224f9a7fe3f19f3fd310f556364d01a22911724b3Borislav Petkov 123239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov/* 124239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov * keep those in sync with the enum mem_type 125239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov */ 126239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkovconst char *edac_mem_types[] = { 127239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Empty csrow", 128239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Reserved csrow type", 129239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Unknown csrow type", 130239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Fast page mode RAM", 131239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Extended data out RAM", 132239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Burst Extended data out RAM", 133239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Single data rate SDRAM", 134239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered single data rate SDRAM", 135239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Double data rate SDRAM", 136239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered Double data rate SDRAM", 137239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Rambus DRAM", 138239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Unbuffered DDR2 RAM", 139239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Fully buffered DDR2", 140239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered DDR2 RAM", 141239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Rambus XDR", 142239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Unbuffered DDR3 RAM", 143239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov "Registered DDR3 RAM", 144239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov}; 145239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav PetkovEXPORT_SYMBOL_GPL(edac_mem_types); 146239642fe19adc19ba0a69e96f3b1904dfd6a3b9fBorislav Petkov 14793e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab/** 14893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * edac_align_ptr - Prepares the pointer offsets for a single-shot allocation 14993e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * @p: pointer to a pointer with the memory offset to be used. At 15093e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * return, this will be incremented to point to the next offset 15193e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * @size: Size of the data structure to be reserved 15293e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * @n_elems: Number of elements that should be reserved 153da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 154da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * If 'size' is a constant, the compiler will optimize this whole function 15593e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * down to either a no-op or the addition of a constant to the value of '*p'. 15693e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 15793e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * The 'p' pointer is absolutely needed to keep the proper advancing 15893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * further in memory to the proper offsets when allocating the struct along 15993e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * with its embedded structs, as edac_device_alloc_ctl_info() does it 16093e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * above, for example. 16193e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 16293e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * At return, the pointer 'p' will be incremented to be used on a next call 16393e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * to this function. 164da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 16593e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehabvoid *edac_align_ptr(void **p, unsigned size, int n_elems) 166da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 167da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned align, r; 16893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab void *ptr = *p; 169da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 17093e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab *p += size * n_elems; 17193e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab 17293e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab /* 17393e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 'p' can possibly be an unaligned item X such that sizeof(X) is 17493e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * 'size'. Adjust 'p' so that its alignment is at least as 17593e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * stringent as what the compiler would provide for X and return 17693e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * the aligned result. 17793e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab * Here we assume that the alignment of a "long long" is the most 178da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * stringent alignment that the compiler will ever provide by default. 179da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * As far as I know, this is a reasonable assumption. 180da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 181da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (size > sizeof(long)) 182da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(long long); 183da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(int)) 184da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(long); 185da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(short)) 186da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(int); 187da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else if (size > sizeof(char)) 188da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox align = sizeof(short); 189da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox else 190079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson return (char *)ptr; 191da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 192da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox r = size % align; 193da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 194da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (r == 0) 195079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson return (char *)ptr; 196da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 19793e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab *p += align - r; 19893e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab 1997391c6dcab3094610cb99bbd559beaa282582eacDouglas Thompson return (void *)(((unsigned long)ptr) + align - r); 200da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 201da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 202da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 2034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * edac_mc_alloc: Allocate and partially fill a struct mem_ctl_info structure 2044275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * @mc_num: Memory controller number 2054275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * @n_layers: Number of MC hierarchy layers 2064275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * layers: Describes each layer as seen by the Memory Controller 2074275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * @size_pvt: size of private storage needed 2084275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * 209da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 210da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Everything is kmalloc'ed as one big chunk - more efficient. 211da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Only can be used if all structures have the same lifetime - otherwise 212da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * you have to allocate and initialize your own structures. 213da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 214da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Use edac_mc_free() to free mc structures allocated by this function. 215da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 2164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * NOTE: drivers handle multi-rank memories in different ways: in some 2174275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * drivers, one multi-rank memory stick is mapped as one entry, while, in 2184275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * others, a single multi-rank memory stick would be mapped into several 2194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * entries. Currently, this function will allocate multiple struct dimm_info 2204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * on such scenarios, as grouping the multiple ranks require drivers change. 2214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * 222da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Returns: 223ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab * On failure: NULL 224ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab * On success: struct mem_ctl_info pointer 225da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 226ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehabstruct mem_ctl_info *edac_mc_alloc(unsigned mc_num, 227ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab unsigned n_layers, 228ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab struct edac_mc_layer *layers, 229ca0907b9e413bb1d1f3ea123b663535b74928846Mauro Carvalho Chehab unsigned sz_pvt) 230da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 231da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *mci; 2324275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab struct edac_mc_layer *layer; 233de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct csrow_info *csr; 234de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct rank_info *chan; 235a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab struct dimm_info *dimm; 2364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS]; 2374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned pos[EDAC_MAX_LAYERS]; 2384275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned size, tot_dimms = 1, count = 1; 2394275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned tot_csrows = 1, tot_channels = 1, tot_errcount = 0; 2405926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab void *pvt, *p, *ptr = NULL; 241de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab int i, j, row, chn, n, len, off; 2424275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab bool per_rank = false; 2434275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 2444275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0); 2454275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 2464275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Calculate the total amount of dimms and csrows/cschannels while 2474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * in the old API emulation mode 2484275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 2494275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < n_layers; i++) { 2504275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_dimms *= layers[i].size; 2514275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (layers[i].is_virt_csrow) 2524275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_csrows *= layers[i].size; 2534275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 2544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_channels *= layers[i].size; 2554275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 2564275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (layers[i].type == EDAC_MC_LAYER_CHIP_SELECT) 2574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab per_rank = true; 2584275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 259da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 260da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Figure out the offsets of the various items from the start of an mc 261da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * structure. We want the alignment of each item to be at least as 262da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * stringent as what the compiler would provide if we could simply 263da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * hardcode everything into a single struct. 264da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 26593e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab mci = edac_align_ptr(&ptr, sizeof(*mci), 1); 2664275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab layer = edac_align_ptr(&ptr, sizeof(*layer), n_layers); 2674275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < n_layers; i++) { 2684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab count *= layers[i].size; 269956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "errcount layer %d size %d\n", i, count); 2704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab ce_per_layer[i] = edac_align_ptr(&ptr, sizeof(u32), count); 2714275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab ue_per_layer[i] = edac_align_ptr(&ptr, sizeof(u32), count); 2724275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab tot_errcount += 2 * count; 2734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 2744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 275956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "allocating %d error counters\n", tot_errcount); 27693e4fe64ece4eccf0ff4ac69bceb389290b8ab7cMauro Carvalho Chehab pvt = edac_align_ptr(&ptr, sz_pvt, 1); 277079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson size = ((unsigned long)pvt) + sz_pvt; 278da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 279956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(1, "allocating %u bytes for mci data (%d %s, %d csrows/channels)\n", 280956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches size, 281956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches tot_dimms, 282956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches per_rank ? "ranks" : "dimms", 283956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches tot_csrows * tot_channels); 284de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 2858096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson mci = kzalloc(size, GFP_KERNEL); 2868096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson if (mci == NULL) 287da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return NULL; 288da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 289da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Adjust pointers so they point within the memory we just allocated 290da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * rather than an imaginary chunk of memory located at address 0. 291da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 2924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab layer = (struct edac_mc_layer *)(((char *)mci) + ((unsigned long)layer)); 2934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < n_layers; i++) { 2944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ce_per_layer[i] = (u32 *)((char *)mci + ((unsigned long)ce_per_layer[i])); 2954275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->ue_per_layer[i] = (u32 *)((char *)mci + ((unsigned long)ue_per_layer[i])); 2964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 297079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL; 298da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 299b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson /* setup index and various internal pointers */ 3004275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->mc_idx = mc_num; 3014275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->tot_dimms = tot_dimms; 302da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->pvt_info = pvt; 3034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->n_layers = n_layers; 3044275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->layers = layer; 3054275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab memcpy(mci->layers, layers, sizeof(*layer) * n_layers); 3064275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->nr_csrows = tot_csrows; 3074275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->num_cschannel = tot_channels; 3084275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab mci->mem_is_per_rank = per_rank; 309da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 310a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab /* 311de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab * Alocate and fill the csrow/channels structs 312a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab */ 313de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->csrows = kcalloc(sizeof(*mci->csrows), tot_csrows, GFP_KERNEL); 314de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!mci->csrows) 315de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 3164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (row = 0; row < tot_csrows; row++) { 317de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr = kzalloc(sizeof(**mci->csrows), GFP_KERNEL); 318de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!csr) 319de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 320de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->csrows[row] = csr; 3214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab csr->csrow_idx = row; 3224275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab csr->mci = mci; 3234275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab csr->nr_channels = tot_channels; 324de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr->channels = kcalloc(sizeof(*csr->channels), tot_channels, 325de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab GFP_KERNEL); 326de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!csr->channels) 327de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 3284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (chn = 0; chn < tot_channels; chn++) { 330de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab chan = kzalloc(sizeof(**csr->channels), GFP_KERNEL); 331de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!chan) 332de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 333de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr->channels[chn] = chan; 334da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox chan->chan_idx = chn; 3354275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan->csrow = csr; 3364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 3374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 3384275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3394275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 340de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab * Allocate and fill the dimm structs 3414275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 342de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->dimms = kcalloc(sizeof(*mci->dimms), tot_dimms, GFP_KERNEL); 343de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (!mci->dimms) 344de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 345de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 3464275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab memset(&pos, 0, sizeof(pos)); 3474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = 0; 3484275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chn = 0; 3494275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < tot_dimms; i++) { 350de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab chan = mci->csrows[row]->channels[chn]; 351de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab off = EDAC_DIMM_OFF(layer, n_layers, pos[0], pos[1], pos[2]); 352de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (off < 0 || off >= tot_dimms) { 353de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab edac_mc_printk(mci, KERN_ERR, "EDAC core bug: EDAC_DIMM_OFF is trying to do an illegal data access\n"); 354de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab goto error; 355de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 356de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 357de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab dimm = kzalloc(sizeof(**mci->dimms), GFP_KERNEL); 35808a4a136909602eae0e71e147153461df077a46fDan Carpenter if (!dimm) 35908a4a136909602eae0e71e147153461df077a46fDan Carpenter goto error; 360de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab mci->dimms[off] = dimm; 3614275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->mci = mci; 3624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3635926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab /* 3645926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab * Copy DIMM location and initialize it. 3655926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab */ 3665926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab len = sizeof(dimm->label); 3675926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab p = dimm->label; 3685926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab n = snprintf(p, len, "mc#%u", mc_num); 3695926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab p += n; 3705926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab len -= n; 3715926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab for (j = 0; j < n_layers; j++) { 3725926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab n = snprintf(p, len, "%s#%u", 3735926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab edac_layer_name[layers[j].type], 3745926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab pos[j]); 3755926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab p += n; 3765926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab len -= n; 3774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->location[j] = pos[j]; 3784275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3795926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab if (len <= 0) 3805926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab break; 3815926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab } 3825926ff502f6b93ca0c1654f8a5c5317ea236dbdbMauro Carvalho Chehab 3834275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Link it to the csrows old API data */ 3844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan->dimm = dimm; 3854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->csrow = row; 3864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab dimm->cschannel = chn; 3874275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 3884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Increment csrow location */ 3894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row++; 3904275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row == tot_csrows) { 3914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = 0; 3924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chn++; 3934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 394a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab 3954275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Increment dimm location */ 3964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (j = n_layers - 1; j >= 0; j--) { 3974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[j]++; 3984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[j] < layers[j].size) 3994275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab break; 4004275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[j] = 0; 401da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 402da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 403da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 40481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_ALLOC; 40581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 4068096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson /* at this point, the root kobj is valid, and in order to 4078096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * 'free' the object, then the function: 4088096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * edac_mc_unregister_sysfs_main_kobj() must be called 4098096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * which will perform kobj unregistration and the actual free 4108096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * will occur during the kobject callback operation 4118096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson */ 41253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 413da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return mci; 414de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 415de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehaberror: 416de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (mci->dimms) { 417de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab for (i = 0; i < tot_dimms; i++) 418de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->dimms[i]); 419de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->dimms); 420de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 421de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (mci->csrows) { 422de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab for (chn = 0; chn < tot_channels; chn++) { 423de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab csr = mci->csrows[chn]; 424de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab if (csr) { 425de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab for (chn = 0; chn < tot_channels; chn++) 426de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(csr->channels[chn]); 427de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(csr); 428de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 429de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->csrows[i]); 430de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 431de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci->csrows); 432de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab } 433de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab kfree(mci); 434de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab 435de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab return NULL; 4364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 4379110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_alloc); 438da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 439da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 4408096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * edac_mc_free 4418096cfafbb7ad3cb1a286ae7e8086167f4ebb4b6Doug Thompson * 'Free' a previously allocated 'mci' structure 442da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @mci: pointer to a struct mem_ctl_info structure 443da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 444da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Coxvoid edac_mc_free(struct mem_ctl_info *mci) 445da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 446956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(1, "\n"); 447bbc560ae677c0f4d7ff8404a21409c99f35b297bMauro Carvalho Chehab 448de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab /* the mci instance is freed here, when the sysfs object is dropped */ 4497a623c039075e4ea21648d88133fafa6dcfd113dMauro Carvalho Chehab edac_unregister_sysfs(mci); 450da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 4519110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_free); 452da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 453bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 454939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho Chehab/** 455bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * find_mci_by_dev 456bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * 457bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * scan list of controllers looking for the one that manages 458bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * the 'dev' device 459939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho Chehab * @dev: pointer to a struct device related with the MCI 460bce19683c17485b584b62b984d6dcf5332181588Doug Thompson */ 461939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho Chehabstruct mem_ctl_info *find_mci_by_dev(struct device *dev) 462da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 463da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *mci; 464da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct list_head *item; 465da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 466956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\n"); 467da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 468da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox list_for_each(item, &mc_devices) { 469da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci = list_entry(item, struct mem_ctl_info, link); 470da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 471fd687502dc8037aa5a4b84c570ada971106574eeMauro Carvalho Chehab if (mci->pdev == dev) 472da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return mci; 473da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 474da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 475da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return NULL; 476da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 477939747bd680eb09bb98792b17a5bfd2f525afe9dMauro Carvalho ChehabEXPORT_SYMBOL_GPL(find_mci_by_dev); 478da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 47981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 48081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * handler for EDAC to check if NMI type handler has asserted interrupt 48181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 48281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangstatic int edac_mc_assert_error_check_and_clear(void) 48381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 48466ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang int old_state; 48581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 486079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson if (edac_op_state == EDAC_OPSTATE_POLL) 48781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang return 1; 48881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 48966ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang old_state = edac_err_assert; 49066ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang edac_err_assert = 0; 49181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 49266ee2f940ac8ab25f0c43a1e717d25dc46bfe74dDave Jiang return old_state; 49381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 49481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 49581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 49681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_function 49781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * performs the operation scheduled by a workq request 49881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 49981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiangstatic void edac_mc_workq_function(struct work_struct *work_req) 50081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 501fbeb4384748abb78531bbe1e80d627412a0abcfaJean Delvare struct delayed_work *d_work = to_delayed_work(work_req); 50281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work); 50381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 50481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_lock(&mem_ctls_mutex); 50581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 506bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson /* if this control struct has movd to offline state, we are done */ 507bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (mci->op_state == OP_OFFLINE) { 508bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson mutex_unlock(&mem_ctls_mutex); 509bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson return; 510bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson } 511bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 51281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* Only poll controllers that are running polled and have a check */ 51381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL)) 51481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->edac_check(mci); 51581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 51681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_unlock(&mem_ctls_mutex); 51781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 51881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* Reschedule */ 5194de78c6877ec21142582ac19453c2d453d1ea298Dave Jiang queue_delayed_work(edac_workqueue, &mci->work, 520052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson msecs_to_jiffies(edac_mc_get_poll_msec())); 52181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 52281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 52381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 52481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_setup 52581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * initialize a workq item for this mci 52681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * passing in the new delay period in msec 527bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 528bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * locking model: 529bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 530bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * called with the mem_ctls_mutex held 53181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 532bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompsonstatic void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec) 53381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 534956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "\n"); 53581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 536bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson /* if this instance is not in the POLL state, then simply return */ 537bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (mci->op_state != OP_RUNNING_POLL) 538bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson return; 539bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 54081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function); 54181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec)); 54281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 54381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 54481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 54581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * edac_mc_workq_teardown 54681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang * stop the workq processing on this mci 547bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 548bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * locking model: 549bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 550bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * called WITHOUT lock held 55181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 552bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompsonstatic void edac_mc_workq_teardown(struct mem_ctl_info *mci) 55381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 55481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang int status; 55581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 55600740c58541b6087d78418cebca1fcb86dc6077dBorislav Petkov if (mci->op_state != OP_RUNNING_POLL) 55700740c58541b6087d78418cebca1fcb86dc6077dBorislav Petkov return; 55800740c58541b6087d78418cebca1fcb86dc6077dBorislav Petkov 559bce19683c17485b584b62b984d6dcf5332181588Doug Thompson status = cancel_delayed_work(&mci->work); 560bce19683c17485b584b62b984d6dcf5332181588Doug Thompson if (status == 0) { 561956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "not canceled, flush the queue\n"); 562bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 563bce19683c17485b584b62b984d6dcf5332181588Doug Thompson /* workq instance might be running, wait for it */ 564bce19683c17485b584b62b984d6dcf5332181588Doug Thompson flush_workqueue(edac_workqueue); 56581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } 56681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 56781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 56881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang/* 569bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * edac_mc_reset_delay_period(unsigned long value) 570bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * 571bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * user space has updated our poll period value, need to 572bce19683c17485b584b62b984d6dcf5332181588Doug Thompson * reset our workq delays 57381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang */ 574bce19683c17485b584b62b984d6dcf5332181588Doug Thompsonvoid edac_mc_reset_delay_period(int value) 57581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang{ 576bce19683c17485b584b62b984d6dcf5332181588Doug Thompson struct mem_ctl_info *mci; 577bce19683c17485b584b62b984d6dcf5332181588Doug Thompson struct list_head *item; 578bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 579bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mutex_lock(&mem_ctls_mutex); 580bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 581bce19683c17485b584b62b984d6dcf5332181588Doug Thompson /* scan the list and turn off all workq timers, doing so under lock 582bce19683c17485b584b62b984d6dcf5332181588Doug Thompson */ 583bce19683c17485b584b62b984d6dcf5332181588Doug Thompson list_for_each(item, &mc_devices) { 584bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mci = list_entry(item, struct mem_ctl_info, link); 585bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 586bce19683c17485b584b62b984d6dcf5332181588Doug Thompson if (mci->op_state == OP_RUNNING_POLL) 587bce19683c17485b584b62b984d6dcf5332181588Doug Thompson cancel_delayed_work(&mci->work); 588bce19683c17485b584b62b984d6dcf5332181588Doug Thompson } 589bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 590bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mutex_unlock(&mem_ctls_mutex); 59181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 592bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 593bce19683c17485b584b62b984d6dcf5332181588Doug Thompson /* re-walk the list, and reset the poll delay */ 594bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson mutex_lock(&mem_ctls_mutex); 595bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 596bce19683c17485b584b62b984d6dcf5332181588Doug Thompson list_for_each(item, &mc_devices) { 597bce19683c17485b584b62b984d6dcf5332181588Doug Thompson mci = list_entry(item, struct mem_ctl_info, link); 598bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 599bce19683c17485b584b62b984d6dcf5332181588Doug Thompson edac_mc_workq_setup(mci, (unsigned long) value); 600bce19683c17485b584b62b984d6dcf5332181588Doug Thompson } 60181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 60281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mutex_unlock(&mem_ctls_mutex); 60381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang} 60481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 605bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 606bce19683c17485b584b62b984d6dcf5332181588Doug Thompson 6072d7bbb91c8df26c60d223205a087507430024177Doug Thompson/* Return 0 on success, 1 on failure. 6082d7bbb91c8df26c60d223205a087507430024177Doug Thompson * Before calling this function, caller must 6092d7bbb91c8df26c60d223205a087507430024177Doug Thompson * assign a unique value to mci->mc_idx. 610bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 611bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * locking model: 612bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * 613bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson * called with the mem_ctls_mutex lock held 6142d7bbb91c8df26c60d223205a087507430024177Doug Thompson */ 615079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstatic int add_mc_to_global_list(struct mem_ctl_info *mci) 616da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 617da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct list_head *item, *insert_before; 618da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct mem_ctl_info *p; 619da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6202d7bbb91c8df26c60d223205a087507430024177Doug Thompson insert_before = &mc_devices; 621da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 622fd687502dc8037aa5a4b84c570ada971106574eeMauro Carvalho Chehab p = find_mci_by_dev(mci->pdev); 623bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (unlikely(p != NULL)) 6242d7bbb91c8df26c60d223205a087507430024177Doug Thompson goto fail0; 625da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6262d7bbb91c8df26c60d223205a087507430024177Doug Thompson list_for_each(item, &mc_devices) { 6272d7bbb91c8df26c60d223205a087507430024177Doug Thompson p = list_entry(item, struct mem_ctl_info, link); 628da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6292d7bbb91c8df26c60d223205a087507430024177Doug Thompson if (p->mc_idx >= mci->mc_idx) { 6302d7bbb91c8df26c60d223205a087507430024177Doug Thompson if (unlikely(p->mc_idx == mci->mc_idx)) 6312d7bbb91c8df26c60d223205a087507430024177Doug Thompson goto fail1; 632da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 6332d7bbb91c8df26c60d223205a087507430024177Doug Thompson insert_before = item; 6342d7bbb91c8df26c60d223205a087507430024177Doug Thompson break; 635da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 636da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 637da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 638da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox list_add_tail_rcu(&mci->link, insert_before); 639c0d121720220584bba2876b032e58a076b843fa1Dave Jiang atomic_inc(&edac_handlers); 640da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return 0; 6412d7bbb91c8df26c60d223205a087507430024177Doug Thompson 642052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 6432d7bbb91c8df26c60d223205a087507430024177Doug Thompson edac_printk(KERN_WARNING, EDAC_MC, 644fd687502dc8037aa5a4b84c570ada971106574eeMauro Carvalho Chehab "%s (%s) %s %s already assigned %d\n", dev_name(p->pdev), 64517aa7e034416e3080bc57a786d09ba0a4a044561Stephen Rothwell edac_dev_name(mci), p->mod_name, p->ctl_name, p->mc_idx); 6462d7bbb91c8df26c60d223205a087507430024177Doug Thompson return 1; 6472d7bbb91c8df26c60d223205a087507430024177Doug Thompson 648052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 6492d7bbb91c8df26c60d223205a087507430024177Doug Thompson edac_printk(KERN_WARNING, EDAC_MC, 650052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "bug in low-level driver: attempt to assign\n" 651052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson " duplicate mc_idx %d in %s()\n", p->mc_idx, __func__); 6522d7bbb91c8df26c60d223205a087507430024177Doug Thompson return 1; 653da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 654da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 655e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonstatic void del_mc_from_global_list(struct mem_ctl_info *mci) 656a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson{ 657c0d121720220584bba2876b032e58a076b843fa1Dave Jiang atomic_dec(&edac_handlers); 658a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson list_del_rcu(&mci->link); 659e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan 660e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan /* these are for safe removal of devices from global list while 661e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan * NMI handlers may be traversing list 662e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan */ 663e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan synchronize_rcu(); 664e2e77098764636456ba7092a8b3b3b34b2a8e8d8Lai Jiangshan INIT_LIST_HEAD(&mci->link); 665a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson} 666a1d03fcc1399b1e23922bcc3af1772b128aa6e93Dave Peterson 667da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 6685da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'. 6695da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * 6705da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * If found, return a pointer to the structure. 6715da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * Else return NULL. 6725da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * 6735da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson * Caller must hold mem_ctls_mutex. 6745da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson */ 675079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct mem_ctl_info *edac_mc_find(int idx) 6765da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson{ 6775da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson struct list_head *item; 6785da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson struct mem_ctl_info *mci; 6795da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6805da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson list_for_each(item, &mc_devices) { 6815da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson mci = list_entry(item, struct mem_ctl_info, link); 6825da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6835da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson if (mci->mc_idx >= idx) { 6845da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson if (mci->mc_idx == idx) 6855da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson return mci; 6865da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6875da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson break; 6885da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson } 6895da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson } 6905da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6915da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson return NULL; 6925da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson} 6935da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas ThompsonEXPORT_SYMBOL(edac_mc_find); 6945da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson 6955da0831c598f94582bce6bb0a55b8de2f9897cb1Douglas Thompson/** 696472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and 697472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * create sysfs entries associated with mci structure 698da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * @mci: pointer to the mci structure to be added to the list 699da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 700da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * Return: 701da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 0 Success 702da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * !0 Failure 703da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 704da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 705da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - should a warning be printed if no error detection? correction? */ 706b8f6f9755248026f21282e25cac49a1af698056cDoug Thompsonint edac_mc_add_mc(struct mem_ctl_info *mci) 707da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 708956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "\n"); 709b8f6f9755248026f21282e25cac49a1af698056cDoug Thompson 710da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#ifdef CONFIG_EDAC_DEBUG 711da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (edac_debug_level >= 3) 712da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox edac_mc_dump_mci(mci); 713e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 714da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (edac_debug_level >= 4) { 715da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int i; 716da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 717da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (i = 0; i < mci->nr_csrows; i++) { 7186e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab struct csrow_info *csrow = mci->csrows[i]; 7196e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab u32 nr_pages = 0; 720da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox int j; 721e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 7226e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab for (j = 0; j < csrow->nr_channels; j++) 7236e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab nr_pages += csrow->channels[j]->dimm->nr_pages; 7246e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab if (!nr_pages) 7256e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab continue; 7266e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_mc_dump_csrow(csrow); 7276e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab for (j = 0; j < csrow->nr_channels; j++) 7286e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab if (csrow->channels[j]->dimm->nr_pages) 7296e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_mc_dump_channel(csrow->channels[j]); 730da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 7314275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->tot_dimms; i++) 7326e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab if (mci->dimms[i]->nr_pages) 7336e84d359b2bea5ce659b3c3e5d3003fb11bd91d5Mauro Carvalho Chehab edac_mc_dump_dimm(mci->dimms[i], i); 734da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 735da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox#endif 73663b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_lock(&mem_ctls_mutex); 737da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 738da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (add_mc_to_global_list(mci)) 739028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson goto fail0; 740da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 741da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* set load time so that error rate can be tracked */ 742da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox mci->start_time = jiffies; 743da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 7449794f33ddedd878dd92fcf8b4834391840366919eric wollesen if (edac_create_sysfs_mci_device(mci)) { 7459794f33ddedd878dd92fcf8b4834391840366919eric wollesen edac_mc_printk(mci, KERN_WARNING, 746052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "failed to create sysfs device\n"); 7479794f33ddedd878dd92fcf8b4834391840366919eric wollesen goto fail1; 7489794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 749da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 75081d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* If there IS a check routine, then we are running POLLED */ 75181d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang if (mci->edac_check != NULL) { 75281d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang /* This instance is NOW RUNNING */ 75381d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_RUNNING_POLL; 75481d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 75581d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang edac_mc_workq_setup(mci, edac_mc_get_poll_msec()); 75681d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } else { 75781d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang mci->op_state = OP_RUNNING_INTERRUPT; 75881d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang } 75981d87cb13e367bb804bf44889ae0de7369705d6cDave Jiang 760da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Report action taken */ 761bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson edac_mc_printk(mci, KERN_INFO, "Giving out device to '%s' '%s':" 76217aa7e034416e3080bc57a786d09ba0a4a044561Stephen Rothwell " DEV %s\n", mci->mod_name, mci->ctl_name, edac_dev_name(mci)); 763da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 76463b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 765028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson return 0; 766da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 767052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail1: 768028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson del_mc_from_global_list(mci); 769028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson 770052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompsonfail0: 77163b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 772028a7b6d3d9fa2cc41d76d45575345cca8d00a4cDave Peterson return 1; 773da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 7749110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_add_mc); 775da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 776da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/** 777472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * edac_mc_del_mc: Remove sysfs entries for specified mci structure and 778472678ebd30d87cbe8d97562dcc0e46d1076040fDave Peterson * remove mci structure from global list 77937f04581abac20444e5b7106c1e1f28bec5b989cDoug Thompson * @pdev: Pointer to 'struct device' representing mci structure to remove. 780da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox * 78118dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson * Return pointer to removed mci structure, or NULL if device not found. 782da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox */ 783079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompsonstruct mem_ctl_info *edac_mc_del_mc(struct device *dev) 784da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 78518dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson struct mem_ctl_info *mci; 786da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 787956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(0, "\n"); 788bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 78963b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_lock(&mem_ctls_mutex); 79018dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson 791bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson /* find the requested mci struct in the global list */ 792bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson mci = find_mci_by_dev(dev); 793bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson if (mci == NULL) { 79463b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 79518dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson return NULL; 79618dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson } 79718dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson 798da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox del_mc_from_global_list(mci); 79963b7df9101895d1f0a259c567b3bab949a23075fMatthias Kaehlcke mutex_unlock(&mem_ctls_mutex); 800bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 801bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov /* flush workq processes */ 802bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson edac_mc_workq_teardown(mci); 803bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov 804bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov /* marking MCI offline */ 805bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov mci->op_state = OP_OFFLINE; 806bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov 807bb31b3122c0dd07d2d958da17a50ad771ce79e2bBorislav Petkov /* remove from sysfs */ 808bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson edac_remove_sysfs_mci_device(mci); 809bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 810537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_printk(KERN_INFO, EDAC_MC, 811052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "Removed device %d for %s %s: DEV %s\n", mci->mc_idx, 81217aa7e034416e3080bc57a786d09ba0a4a044561Stephen Rothwell mci->mod_name, mci->ctl_name, edac_dev_name(mci)); 813bf52fa4a26567bfbf5b1d30f84cf0226e61d26cdDoug Thompson 81418dbc337af5d6efd30cb9291e74722c8ad134fd3Dave Peterson return mci; 815da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 8169110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_del_mc); 817da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 8182da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunkstatic void edac_mc_scrub_block(unsigned long page, unsigned long offset, 8192da1c119fd999cb834b4fe0c1a5a8c36195df1cbAdrian Bunk u32 size) 820da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 821da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox struct page *pg; 822da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox void *virt_addr; 823da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox unsigned long flags = 0; 824da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 825956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "\n"); 826da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 827da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* ECC error page was not in our memory. Ignore it. */ 828079708b9173595bf74b31b14c36e946359ae6c7eDouglas Thompson if (!pfn_valid(page)) 829da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 830da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 831da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Find the actual page structure then map it and fix */ 832da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox pg = pfn_to_page(page); 833da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 834da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (PageHighMem(pg)) 835da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox local_irq_save(flags); 836da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 8374e5df7ca3091a846b65f2a940a68506790a62d6aCong Wang virt_addr = kmap_atomic(pg); 838da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 839da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Perform architecture specific atomic scrub operation */ 840da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox atomic_scrub(virt_addr + offset, size); 841da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 842da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* Unmap and complete */ 8434e5df7ca3091a846b65f2a940a68506790a62d6aCong Wang kunmap_atomic(virt_addr); 844da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 845da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (PageHighMem(pg)) 846da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox local_irq_restore(flags); 847da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 848da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 849da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox/* FIXME - should return -1 */ 850e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Petersonint edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page) 851da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 852de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct csrow_info **csrows = mci->csrows; 853a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab int row, i, j, n; 854da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 855956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(1, "MC%d: 0x%lx\n", mci->mc_idx, page); 856da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox row = -1; 857da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 858da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox for (i = 0; i < mci->nr_csrows; i++) { 859de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct csrow_info *csrow = csrows[i]; 860a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab n = 0; 861a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab for (j = 0; j < csrow->nr_channels; j++) { 862de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct dimm_info *dimm = csrow->channels[j]->dimm; 863a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab n += dimm->nr_pages; 864a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab } 865a895bf8b1e1ea4c032a8fa8a09475a2ce09fe77aMauro Carvalho Chehab if (n == 0) 866da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox continue; 867da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 868956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "MC%d: first(0x%lx) page(0x%lx) last(0x%lx) mask(0x%lx)\n", 869956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->mc_idx, 870956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches csrow->first_page, page, csrow->last_page, 871956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches csrow->page_mask); 872da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 873da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if ((page >= csrow->first_page) && 874da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox (page <= csrow->last_page) && 875da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox ((page & csrow->page_mask) == 876da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox (csrow->first_page & csrow->page_mask))) { 877da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox row = i; 878da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox break; 879da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 880da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 881da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 882da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (row == -1) 883537fba28928c01b7db1580627450691a4bb0b9b3Dave Peterson edac_mc_printk(mci, KERN_ERR, 884052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson "could not look up page error address %lx\n", 885052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson (unsigned long)page); 886da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 887da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return row; 888da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 8899110540f7f2bbcc3577d2580a696fbb7af68c892Dave PetersonEXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page); 890da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 8914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabconst char *edac_layer_name[] = { 8924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_BRANCH] = "branch", 8934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_CHANNEL] = "channel", 8944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_SLOT] = "slot", 8954275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab [EDAC_MC_LAYER_CHIP_SELECT] = "csrow", 8964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab}; 8974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho ChehabEXPORT_SYMBOL_GPL(edac_layer_name); 8984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 8994275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_inc_ce_error(struct mem_ctl_info *mci, 9009eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab bool enable_per_layer_report, 9019eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS], 9029eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab const u16 count) 903da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 9044275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int i, index = 0; 905da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9069eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->ce_mc += count; 907da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9084275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (!enable_per_layer_report) { 9099eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->ce_noinfo_count += count; 910da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 911da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 912e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 9134275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 9144275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] < 0) 9154275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab break; 9164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index += pos[i]; 9179eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->ce_per_layer[i][index] += count; 9184275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (i < mci->n_layers - 1) 9204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index *= mci->layers[i + 1].size; 9214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 9224275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 9234275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9244275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_inc_ue_error(struct mem_ctl_info *mci, 9254275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab bool enable_per_layer_report, 9269eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS], 9279eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab const u16 count) 9284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab{ 9294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int i, index = 0; 9304275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9319eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->ue_mc += count; 9324275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9334275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (!enable_per_layer_report) { 9349eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->ce_noinfo_count += count; 935da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox return; 936da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 937da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9384275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 9394275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] < 0) 9404275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab break; 9414275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index += pos[i]; 9429eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->ue_per_layer[i][index] += count; 943a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab 9444275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (i < mci->n_layers - 1) 9454275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab index *= mci->layers[i + 1].size; 9464275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 9474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab} 948da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9494275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_ce_error(struct mem_ctl_info *mci, 9509eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab const u16 error_count, 9514275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS], 9524275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *msg, 9534275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *location, 9544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *label, 9554275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *detail, 9564275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *other_detail, 9574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const bool enable_per_layer_report, 9584275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long page_frame_number, 9594275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long offset_in_page, 96053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab long grain) 9614275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab{ 9624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab unsigned long remapped_page; 9634275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 9644275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (edac_mc_get_log_ce()) { 9654275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (other_detail && *other_detail) 9664275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 9679eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab "%d CE %s on %s (%s %s - %s)\n", 9689eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab error_count, 9694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, 9704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab detail, other_detail); 9714275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 9724275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 9739eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab "%d CE %s on %s (%s %s)\n", 9749eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab error_count, 9754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, 9764275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab detail); 9774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 9789eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab edac_inc_ce_error(mci, enable_per_layer_report, pos, error_count); 979da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 980da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox if (mci->scrub_mode & SCRUB_SW_SRC) { 981da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox /* 9824275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Some memory controllers (called MCs below) can remap 9834275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * memory so that it is still available at a different 9844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * address when PCI devices map into memory. 9854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * MC's that can't do this, lose the memory where PCI 9864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * devices are mapped. This mapping is MC-dependent 9874275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * and so we call back into the MC driver for it to 9884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * map the MC page to a physical (CPU) page which can 9894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * then be mapped to a virtual page - which can then 9904275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * be scrubbed. 9914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 992da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox remapped_page = mci->ctl_page_to_phys ? 993052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson mci->ctl_page_to_phys(mci, page_frame_number) : 994052dfb45ccb5ea354a426b52556bcfee75b9d2f5Douglas Thompson page_frame_number; 995da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 9964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_scrub_block(remapped_page, 9974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab offset_in_page, grain); 998da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 999da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 1000da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 10014275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabstatic void edac_ue_error(struct mem_ctl_info *mci, 10029eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab const u16 error_count, 10034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const int pos[EDAC_MAX_LAYERS], 10044275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *msg, 10054275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *location, 10064275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *label, 10074275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *detail, 10084275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *other_detail, 10094275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const bool enable_per_layer_report) 1010da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 10114275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (edac_mc_get_log_ue()) { 10124275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (other_detail && *other_detail) 10134275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 10149eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab "%d UE %s on %s (%s %s - %s)\n", 10159eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab error_count, 10164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail, 10174275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab other_detail); 10184275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 10194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_WARNING, 10209eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab "%d UE %s on %s (%s %s)\n", 10219eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab error_count, 10224275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail); 10234275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 1024e7ecd8910293564d357dbaf18eb179e06fa35fd0Dave Peterson 10254275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (edac_mc_get_panic_on_ue()) { 10264275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (other_detail && *other_detail) 10274275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab panic("UE %s on %s (%s%s - %s)\n", 10284275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail, other_detail); 10294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 10304275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab panic("UE %s on %s (%s%s)\n", 10314275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab msg, label, location, detail); 10324275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 10334275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 10349eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab edac_inc_ue_error(mci, enable_per_layer_report, pos, error_count); 1035da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox} 1036da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 10374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab#define OTHER_LABEL " or " 103853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 103953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab/** 104053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * edac_mc_handle_error - reports a memory event to userspace 104153f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * 104253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @type: severity of the error (CE/UE/Fatal) 104353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @mci: a struct mem_ctl_info pointer 10449eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab * @error_count: Number of errors of the same type 104553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @page_frame_number: mem page where the error occurred 104653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @offset_in_page: offset of the error inside the page 104753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @syndrome: ECC syndrome 104853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @top_layer: Memory layer[0] position 104953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @mid_layer: Memory layer[1] position 105053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @low_layer: Memory layer[2] position 105153f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @msg: Message meaningful to the end users that 105253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * explains the event 105353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * @other_detail: Technical details about the event that 105453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * may help hardware manufacturers and 105553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab * EDAC developers to analyse the event 105653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab */ 10574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehabvoid edac_mc_handle_error(const enum hw_event_mc_err_type type, 10584275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab struct mem_ctl_info *mci, 10599eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab const u16 error_count, 10604275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long page_frame_number, 10614275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long offset_in_page, 10624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const unsigned long syndrome, 106353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab const int top_layer, 106453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab const int mid_layer, 106553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab const int low_layer, 10664275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab const char *msg, 106703f7eae80f4b913929be84e0c883ee98196fd6ffMauro Carvalho Chehab const char *other_detail) 1068da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox{ 10694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* FIXME: too much for stack: move it to some pre-alocated area */ 10704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab char detail[80], location[80]; 10714275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab char label[(EDAC_MC_LABEL_LEN + 1 + sizeof(OTHER_LABEL)) * mci->tot_dimms]; 10724275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab char *p; 10734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int row = -1, chan = -1; 107453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab int pos[EDAC_MAX_LAYERS] = { top_layer, mid_layer, low_layer }; 10754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab int i; 107653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab long grain; 10774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab bool enable_per_layer_report = false; 107853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab u8 grain_bits; 1079da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 1080956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(3, "MC%d\n", mci->mc_idx); 1081da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 10824275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 10834275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Check if the event report is consistent and if the memory 10844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * location is known. If it is known, enable_per_layer_report will be 10854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * true, the DIMM(s) label info will be filled and the per-layer 10864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * error counters will be incremented. 10874275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 10884275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 10894275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] >= (int)mci->layers[i].size) { 10904275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (type == HW_EVENT_ERR_CORRECTED) 10914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = "CE"; 10924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else 10934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = "UE"; 10944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 10954275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_mc_printk(mci, KERN_ERR, 10964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab "INTERNAL ERROR: %s value is out of range (%d >= %d)\n", 10974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_layer_name[mci->layers[i].type], 10984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[i], mci->layers[i].size); 10994275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 11004275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Instead of just returning it, let's use what's 11014275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * known about the error. The increment routines and 11024275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * the DIMM filter logic will do the right thing by 11034275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * pointing the likely damaged DIMMs. 11044275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 11054275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[i] = -1; 11064275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 11074275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] >= 0) 11084275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab enable_per_layer_report = true; 1109da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox } 1110da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 11114275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 11124275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Get the dimm label/grain that applies to the match criteria. 11134275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * As the error algorithm may not be able to point to just one memory 11144275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * stick, the logic here will get all possible labels that could 11154275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * pottentially be affected by the error. 11164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * On FB-DIMM memory controllers, for uncorrected errors, it is common 11174275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * to have only the MC channel and the MC dimm (also called "branch") 11184275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * but the channel is not known, as the memory is arranged in pairs, 11194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * where each memory belongs to a separate channel within the same 11204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * branch. 11214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 11224275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab grain = 0; 11234275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = label; 11244275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab *p = '\0'; 11254275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->tot_dimms; i++) { 1126de3910eb79ac8c0f29a11224661c0ebaaf813039Mauro Carvalho Chehab struct dimm_info *dimm = mci->dimms[i]; 1127da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 112853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (top_layer >= 0 && top_layer != dimm->location[0]) 11294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 113053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (mid_layer >= 0 && mid_layer != dimm->location[1]) 11314275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 113253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (low_layer >= 0 && low_layer != dimm->location[2]) 11334275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 1134da9bb1d27b21cb24cbb6a2efb5d3c464d357a01eAlan Cox 11354275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* get the max grain, over the error match range */ 11364275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (dimm->grain > grain) 11374275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab grain = dimm->grain; 11389794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11394275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 11404275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * If the error is memory-controller wide, there's no need to 11414275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * seek for the affected DIMMs because the whole 11424275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * channel/memory controller/... may be affected. 11434275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * Also, don't show errors for empty DIMM slots. 11444275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 11454275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (enable_per_layer_report && dimm->nr_pages) { 11464275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (p != label) { 11474275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(p, OTHER_LABEL); 11484275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p += strlen(OTHER_LABEL); 11494275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 11504275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(p, dimm->label); 11514275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p += strlen(p); 11524275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab *p = '\0'; 11534275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 11544275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* 11554275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * get csrow/channel of the DIMM, in order to allow 11564275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab * incrementing the compat API counters 11574275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab */ 1158956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "%s csrows map: (%d,%d)\n", 1159956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches mci->mem_is_per_rank ? "rank" : "dimm", 1160956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches dimm->csrow, dimm->cschannel); 11614275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row == -1) 11624275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = dimm->csrow; 11634275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else if (row >= 0 && row != dimm->csrow) 11644275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab row = -2; 11654275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab 11664275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (chan == -1) 11674275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan = dimm->cschannel; 11684275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab else if (chan >= 0 && chan != dimm->cschannel) 11694275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab chan = -2; 11704275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 11719794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 11729794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11734275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (!enable_per_layer_report) { 11744275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(label, "any memory"); 11754275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } else { 1176956b9ba156dbfdb9cede2b2927ddf8be2233b3a7Joe Perches edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan); 11774275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (p == label) 11784275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab strcpy(label, "unknown memory"); 11794275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (type == HW_EVENT_ERR_CORRECTED) { 11804275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row >= 0) { 11819eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->csrows[row]->ce_count += error_count; 11824275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (chan >= 0) 11839eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->csrows[row]->channels[chan]->ce_count += error_count; 11844275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 11854275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } else 11864275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (row >= 0) 11879eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab mci->csrows[row]->ue_count += error_count; 11889794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 11899794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11904275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Fill the RAM location data */ 11914275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p = location; 11924275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab for (i = 0; i < mci->n_layers; i++) { 11934275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (pos[i] < 0) 11944275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab continue; 11959794f33ddedd878dd92fcf8b4834391840366919eric wollesen 11964275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab p += sprintf(p, "%s:%d ", 11974275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab edac_layer_name[mci->layers[i].type], 11984275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab pos[i]); 11999794f33ddedd878dd92fcf8b4834391840366919eric wollesen } 120053f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab if (p > location) 120153f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab *(p - 1) = '\0'; 120253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 120353f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab /* Report the error via the trace interface */ 120453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab 120553f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab grain_bits = fls_long(grain) + 1; 120653f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab trace_mc_event(type, msg, label, error_count, 120753f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab mci->mc_idx, top_layer, mid_layer, low_layer, 120853f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab PAGES_TO_MiB(page_frame_number) | offset_in_page, 120953f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab grain_bits, syndrome, other_detail); 1210a7d7d2e1a07e3811dc49af2962c940fd8bbb6c8fMauro Carvalho Chehab 12114275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab /* Memory type dependent details about the error */ 12124275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab if (type == HW_EVENT_ERR_CORRECTED) { 12134275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab snprintf(detail, sizeof(detail), 121453f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "page:0x%lx offset:0x%lx grain:%ld syndrome:0x%lx", 12154275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab page_frame_number, offset_in_page, 12164275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab grain, syndrome); 12179eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab edac_ce_error(mci, error_count, pos, msg, location, label, 12189eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab detail, other_detail, enable_per_layer_report, 12194275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab page_frame_number, offset_in_page, grain); 12204275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } else { 12214275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab snprintf(detail, sizeof(detail), 122253f2d02898755d1b24bde1975e202815d29fdb81Mauro Carvalho Chehab "page:0x%lx offset:0x%lx grain:%ld", 12234275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab page_frame_number, offset_in_page, grain); 12249794f33ddedd878dd92fcf8b4834391840366919eric wollesen 12259eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab edac_ue_error(mci, error_count, pos, msg, location, label, 12269eb07a7fb8a90ee39fa9d5489afc0330cfcfbea7Mauro Carvalho Chehab detail, other_detail, enable_per_layer_report); 12274275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho Chehab } 12289794f33ddedd878dd92fcf8b4834391840366919eric wollesen} 12294275be63559719c3149b19751029f1b0f1b26775Mauro Carvalho ChehabEXPORT_SYMBOL_GPL(edac_mc_handle_error); 1230