![Nigel Cunningham](/assets/img/avatar_default.png)
Move process freezing functions from include/linux/sched.h to freezer.h, so that modifications to the freezer or the kernel configuration don't require recompiling just about everything. [akpm@osdl.org: fix ueagle driver] Signed-off-by: Nigel Cunningham <nigel@suspend2.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1840 lines
46 KiB
C
1840 lines
46 KiB
C
/*
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* edac_mc kernel module
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* (C) 2005, 2006 Linux Networx (http://lnxi.com)
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* This file may be distributed under the terms of the
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* GNU General Public License.
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*
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* Written by Thayne Harbaugh
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* Based on work by Dan Hollis <goemon at anime dot net> and others.
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* http://www.anime.net/~goemon/linux-ecc/
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*
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* Modified by Dave Peterson and Doug Thompson
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*
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*/
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/smp.h>
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#include <linux/init.h>
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#include <linux/sysctl.h>
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#include <linux/highmem.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/sysdev.h>
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#include <linux/ctype.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <asm/uaccess.h>
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#include <asm/page.h>
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#include <asm/edac.h>
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#include "edac_mc.h"
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#define EDAC_MC_VERSION "Ver: 2.0.1 " __DATE__
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#ifdef CONFIG_EDAC_DEBUG
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/* Values of 0 to 4 will generate output */
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int edac_debug_level = 1;
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EXPORT_SYMBOL_GPL(edac_debug_level);
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#endif
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/* EDAC Controls, setable by module parameter, and sysfs */
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static int log_ue = 1;
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static int log_ce = 1;
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static int panic_on_ue;
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static int poll_msec = 1000;
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/* lock to memory controller's control array */
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static DECLARE_MUTEX(mem_ctls_mutex);
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static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices);
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static struct task_struct *edac_thread;
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#ifdef CONFIG_PCI
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static int check_pci_parity = 0; /* default YES check PCI parity */
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static int panic_on_pci_parity; /* default no panic on PCI Parity */
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static atomic_t pci_parity_count = ATOMIC_INIT(0);
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static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */
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static struct completion edac_pci_kobj_complete;
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#endif /* CONFIG_PCI */
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/* START sysfs data and methods */
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static const char *mem_types[] = {
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[MEM_EMPTY] = "Empty",
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[MEM_RESERVED] = "Reserved",
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[MEM_UNKNOWN] = "Unknown",
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[MEM_FPM] = "FPM",
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[MEM_EDO] = "EDO",
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[MEM_BEDO] = "BEDO",
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[MEM_SDR] = "Unbuffered-SDR",
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[MEM_RDR] = "Registered-SDR",
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[MEM_DDR] = "Unbuffered-DDR",
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[MEM_RDDR] = "Registered-DDR",
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[MEM_RMBS] = "RMBS"
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};
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static const char *dev_types[] = {
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[DEV_UNKNOWN] = "Unknown",
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[DEV_X1] = "x1",
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[DEV_X2] = "x2",
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[DEV_X4] = "x4",
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[DEV_X8] = "x8",
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[DEV_X16] = "x16",
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[DEV_X32] = "x32",
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[DEV_X64] = "x64"
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};
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static const char *edac_caps[] = {
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[EDAC_UNKNOWN] = "Unknown",
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[EDAC_NONE] = "None",
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[EDAC_RESERVED] = "Reserved",
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[EDAC_PARITY] = "PARITY",
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[EDAC_EC] = "EC",
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[EDAC_SECDED] = "SECDED",
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[EDAC_S2ECD2ED] = "S2ECD2ED",
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[EDAC_S4ECD4ED] = "S4ECD4ED",
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[EDAC_S8ECD8ED] = "S8ECD8ED",
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[EDAC_S16ECD16ED] = "S16ECD16ED"
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};
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/* sysfs object: /sys/devices/system/edac */
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static struct sysdev_class edac_class = {
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set_kset_name("edac"),
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};
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/* sysfs object:
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* /sys/devices/system/edac/mc
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*/
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static struct kobject edac_memctrl_kobj;
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/* We use these to wait for the reference counts on edac_memctrl_kobj and
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* edac_pci_kobj to reach 0.
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*/
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static struct completion edac_memctrl_kobj_complete;
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/*
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* /sys/devices/system/edac/mc;
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* data structures and methods
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*/
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static ssize_t memctrl_int_show(void *ptr, char *buffer)
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{
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int *value = (int*) ptr;
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return sprintf(buffer, "%u\n", *value);
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}
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static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
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{
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int *value = (int*) ptr;
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if (isdigit(*buffer))
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*value = simple_strtoul(buffer, NULL, 0);
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return count;
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}
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struct memctrl_dev_attribute {
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struct attribute attr;
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void *value;
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ssize_t (*show)(void *,char *);
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ssize_t (*store)(void *, const char *, size_t);
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};
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/* Set of show/store abstract level functions for memory control object */
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static ssize_t memctrl_dev_show(struct kobject *kobj,
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struct attribute *attr, char *buffer)
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{
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struct memctrl_dev_attribute *memctrl_dev;
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memctrl_dev = (struct memctrl_dev_attribute*)attr;
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if (memctrl_dev->show)
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return memctrl_dev->show(memctrl_dev->value, buffer);
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return -EIO;
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}
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static ssize_t memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
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const char *buffer, size_t count)
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{
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struct memctrl_dev_attribute *memctrl_dev;
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memctrl_dev = (struct memctrl_dev_attribute*)attr;
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if (memctrl_dev->store)
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return memctrl_dev->store(memctrl_dev->value, buffer, count);
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return -EIO;
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}
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static struct sysfs_ops memctrlfs_ops = {
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.show = memctrl_dev_show,
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.store = memctrl_dev_store
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};
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#define MEMCTRL_ATTR(_name,_mode,_show,_store) \
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struct memctrl_dev_attribute attr_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.value = &_name, \
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.show = _show, \
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.store = _store, \
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};
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#define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \
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struct memctrl_dev_attribute attr_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.value = _data, \
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.show = _show, \
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.store = _store, \
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};
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/* csrow<id> control files */
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MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
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MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
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MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
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MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
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/* Base Attributes of the memory ECC object */
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static struct memctrl_dev_attribute *memctrl_attr[] = {
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&attr_panic_on_ue,
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&attr_log_ue,
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&attr_log_ce,
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&attr_poll_msec,
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NULL,
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};
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/* Main MC kobject release() function */
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static void edac_memctrl_master_release(struct kobject *kobj)
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{
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debugf1("%s()\n", __func__);
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complete(&edac_memctrl_kobj_complete);
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}
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static struct kobj_type ktype_memctrl = {
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.release = edac_memctrl_master_release,
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.sysfs_ops = &memctrlfs_ops,
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.default_attrs = (struct attribute **) memctrl_attr,
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};
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/* Initialize the main sysfs entries for edac:
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* /sys/devices/system/edac
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*
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* and children
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*
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* Return: 0 SUCCESS
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* !0 FAILURE
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*/
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static int edac_sysfs_memctrl_setup(void)
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{
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int err = 0;
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debugf1("%s()\n", __func__);
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/* create the /sys/devices/system/edac directory */
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err = sysdev_class_register(&edac_class);
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if (err) {
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debugf1("%s() error=%d\n", __func__, err);
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return err;
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}
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/* Init the MC's kobject */
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memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
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edac_memctrl_kobj.parent = &edac_class.kset.kobj;
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edac_memctrl_kobj.ktype = &ktype_memctrl;
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/* generate sysfs "..../edac/mc" */
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err = kobject_set_name(&edac_memctrl_kobj,"mc");
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if (err)
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goto fail;
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/* FIXME: maybe new sysdev_create_subdir() */
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err = kobject_register(&edac_memctrl_kobj);
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if (err) {
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debugf1("Failed to register '.../edac/mc'\n");
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goto fail;
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}
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debugf1("Registered '.../edac/mc' kobject\n");
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return 0;
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fail:
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sysdev_class_unregister(&edac_class);
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return err;
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}
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/*
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* MC teardown:
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* the '..../edac/mc' kobject followed by '..../edac' itself
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*/
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static void edac_sysfs_memctrl_teardown(void)
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{
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debugf0("MC: " __FILE__ ": %s()\n", __func__);
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/* Unregister the MC's kobject and wait for reference count to reach
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* 0.
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*/
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init_completion(&edac_memctrl_kobj_complete);
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kobject_unregister(&edac_memctrl_kobj);
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wait_for_completion(&edac_memctrl_kobj_complete);
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/* Unregister the 'edac' object */
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sysdev_class_unregister(&edac_class);
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}
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#ifdef CONFIG_PCI
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static ssize_t edac_pci_int_show(void *ptr, char *buffer)
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{
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int *value = ptr;
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return sprintf(buffer,"%d\n",*value);
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}
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static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count)
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{
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int *value = ptr;
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if (isdigit(*buffer))
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*value = simple_strtoul(buffer,NULL,0);
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return count;
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}
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struct edac_pci_dev_attribute {
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struct attribute attr;
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void *value;
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ssize_t (*show)(void *,char *);
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ssize_t (*store)(void *, const char *,size_t);
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};
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/* Set of show/store abstract level functions for PCI Parity object */
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static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr,
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char *buffer)
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{
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struct edac_pci_dev_attribute *edac_pci_dev;
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edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
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if (edac_pci_dev->show)
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return edac_pci_dev->show(edac_pci_dev->value, buffer);
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return -EIO;
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}
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static ssize_t edac_pci_dev_store(struct kobject *kobj,
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struct attribute *attr, const char *buffer, size_t count)
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{
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struct edac_pci_dev_attribute *edac_pci_dev;
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edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
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if (edac_pci_dev->show)
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return edac_pci_dev->store(edac_pci_dev->value, buffer, count);
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return -EIO;
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}
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static struct sysfs_ops edac_pci_sysfs_ops = {
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.show = edac_pci_dev_show,
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.store = edac_pci_dev_store
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};
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#define EDAC_PCI_ATTR(_name,_mode,_show,_store) \
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struct edac_pci_dev_attribute edac_pci_attr_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.value = &_name, \
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.show = _show, \
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.store = _store, \
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};
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#define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \
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struct edac_pci_dev_attribute edac_pci_attr_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.value = _data, \
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.show = _show, \
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.store = _store, \
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};
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/* PCI Parity control files */
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EDAC_PCI_ATTR(check_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show,
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edac_pci_int_store);
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EDAC_PCI_ATTR(panic_on_pci_parity, S_IRUGO|S_IWUSR, edac_pci_int_show,
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edac_pci_int_store);
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EDAC_PCI_ATTR(pci_parity_count, S_IRUGO, edac_pci_int_show, NULL);
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/* Base Attributes of the memory ECC object */
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static struct edac_pci_dev_attribute *edac_pci_attr[] = {
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&edac_pci_attr_check_pci_parity,
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&edac_pci_attr_panic_on_pci_parity,
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&edac_pci_attr_pci_parity_count,
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NULL,
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};
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/* No memory to release */
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static void edac_pci_release(struct kobject *kobj)
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{
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debugf1("%s()\n", __func__);
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complete(&edac_pci_kobj_complete);
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}
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static struct kobj_type ktype_edac_pci = {
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.release = edac_pci_release,
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.sysfs_ops = &edac_pci_sysfs_ops,
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.default_attrs = (struct attribute **) edac_pci_attr,
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};
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/**
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* edac_sysfs_pci_setup()
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*
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*/
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static int edac_sysfs_pci_setup(void)
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{
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int err;
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debugf1("%s()\n", __func__);
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memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj));
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edac_pci_kobj.parent = &edac_class.kset.kobj;
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edac_pci_kobj.ktype = &ktype_edac_pci;
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err = kobject_set_name(&edac_pci_kobj, "pci");
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if (!err) {
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/* Instanstiate the csrow object */
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/* FIXME: maybe new sysdev_create_subdir() */
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err = kobject_register(&edac_pci_kobj);
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if (err)
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debugf1("Failed to register '.../edac/pci'\n");
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else
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debugf1("Registered '.../edac/pci' kobject\n");
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}
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return err;
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}
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static void edac_sysfs_pci_teardown(void)
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{
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debugf0("%s()\n", __func__);
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init_completion(&edac_pci_kobj_complete);
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kobject_unregister(&edac_pci_kobj);
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wait_for_completion(&edac_pci_kobj_complete);
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}
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static u16 get_pci_parity_status(struct pci_dev *dev, int secondary)
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{
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int where;
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u16 status;
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where = secondary ? PCI_SEC_STATUS : PCI_STATUS;
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pci_read_config_word(dev, where, &status);
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/* If we get back 0xFFFF then we must suspect that the card has been
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* pulled but the Linux PCI layer has not yet finished cleaning up.
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* We don't want to report on such devices
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*/
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if (status == 0xFFFF) {
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u32 sanity;
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pci_read_config_dword(dev, 0, &sanity);
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if (sanity == 0xFFFFFFFF)
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return 0;
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}
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status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR |
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PCI_STATUS_PARITY;
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if (status)
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/* reset only the bits we are interested in */
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pci_write_config_word(dev, where, status);
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return status;
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}
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|
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typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev);
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|
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/* Clear any PCI parity errors logged by this device. */
|
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static void edac_pci_dev_parity_clear(struct pci_dev *dev)
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{
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u8 header_type;
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|
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get_pci_parity_status(dev, 0);
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|
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/* read the device TYPE, looking for bridges */
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pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
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if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE)
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get_pci_parity_status(dev, 1);
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}
|
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|
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/*
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* PCI Parity polling
|
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*
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*/
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static void edac_pci_dev_parity_test(struct pci_dev *dev)
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{
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u16 status;
|
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u8 header_type;
|
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|
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/* read the STATUS register on this device
|
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*/
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status = get_pci_parity_status(dev, 0);
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|
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debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id );
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|
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/* check the status reg for errors */
|
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if (status) {
|
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if (status & (PCI_STATUS_SIG_SYSTEM_ERROR))
|
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edac_printk(KERN_CRIT, EDAC_PCI,
|
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"Signaled System Error on %s\n",
|
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pci_name(dev));
|
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|
|
if (status & (PCI_STATUS_PARITY)) {
|
|
edac_printk(KERN_CRIT, EDAC_PCI,
|
|
"Master Data Parity Error on %s\n",
|
|
pci_name(dev));
|
|
|
|
atomic_inc(&pci_parity_count);
|
|
}
|
|
|
|
if (status & (PCI_STATUS_DETECTED_PARITY)) {
|
|
edac_printk(KERN_CRIT, EDAC_PCI,
|
|
"Detected Parity Error on %s\n",
|
|
pci_name(dev));
|
|
|
|
atomic_inc(&pci_parity_count);
|
|
}
|
|
}
|
|
|
|
/* read the device TYPE, looking for bridges */
|
|
pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
|
|
|
|
debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id );
|
|
|
|
if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
|
|
/* On bridges, need to examine secondary status register */
|
|
status = get_pci_parity_status(dev, 1);
|
|
|
|
debugf2("PCI SEC_STATUS= 0x%04x %s\n",
|
|
status, dev->dev.bus_id );
|
|
|
|
/* check the secondary status reg for errors */
|
|
if (status) {
|
|
if (status & (PCI_STATUS_SIG_SYSTEM_ERROR))
|
|
edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
|
|
"Signaled System Error on %s\n",
|
|
pci_name(dev));
|
|
|
|
if (status & (PCI_STATUS_PARITY)) {
|
|
edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
|
|
"Master Data Parity Error on "
|
|
"%s\n", pci_name(dev));
|
|
|
|
atomic_inc(&pci_parity_count);
|
|
}
|
|
|
|
if (status & (PCI_STATUS_DETECTED_PARITY)) {
|
|
edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
|
|
"Detected Parity Error on %s\n",
|
|
pci_name(dev));
|
|
|
|
atomic_inc(&pci_parity_count);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* pci_dev parity list iterator
|
|
* Scan the PCI device list for one iteration, looking for SERRORs
|
|
* Master Parity ERRORS or Parity ERRORs on primary or secondary devices
|
|
*/
|
|
static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn)
|
|
{
|
|
struct pci_dev *dev = NULL;
|
|
|
|
/* request for kernel access to the next PCI device, if any,
|
|
* and while we are looking at it have its reference count
|
|
* bumped until we are done with it
|
|
*/
|
|
while((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
|
|
fn(dev);
|
|
}
|
|
}
|
|
|
|
static void do_pci_parity_check(void)
|
|
{
|
|
unsigned long flags;
|
|
int before_count;
|
|
|
|
debugf3("%s()\n", __func__);
|
|
|
|
if (!check_pci_parity)
|
|
return;
|
|
|
|
before_count = atomic_read(&pci_parity_count);
|
|
|
|
/* scan all PCI devices looking for a Parity Error on devices and
|
|
* bridges
|
|
*/
|
|
local_irq_save(flags);
|
|
edac_pci_dev_parity_iterator(edac_pci_dev_parity_test);
|
|
local_irq_restore(flags);
|
|
|
|
/* Only if operator has selected panic on PCI Error */
|
|
if (panic_on_pci_parity) {
|
|
/* If the count is different 'after' from 'before' */
|
|
if (before_count != atomic_read(&pci_parity_count))
|
|
panic("EDAC: PCI Parity Error");
|
|
}
|
|
}
|
|
|
|
static inline void clear_pci_parity_errors(void)
|
|
{
|
|
/* Clear any PCI bus parity errors that devices initially have logged
|
|
* in their registers.
|
|
*/
|
|
edac_pci_dev_parity_iterator(edac_pci_dev_parity_clear);
|
|
}
|
|
|
|
#else /* CONFIG_PCI */
|
|
|
|
/* pre-process these away */
|
|
#define do_pci_parity_check()
|
|
#define clear_pci_parity_errors()
|
|
#define edac_sysfs_pci_teardown()
|
|
#define edac_sysfs_pci_setup() (0)
|
|
|
|
#endif /* CONFIG_PCI */
|
|
|
|
/* EDAC sysfs CSROW data structures and methods
|
|
*/
|
|
|
|
/* Set of more default csrow<id> attribute show/store functions */
|
|
static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data, int private)
|
|
{
|
|
return sprintf(data,"%u\n", csrow->ue_count);
|
|
}
|
|
|
|
static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data, int private)
|
|
{
|
|
return sprintf(data,"%u\n", csrow->ce_count);
|
|
}
|
|
|
|
static ssize_t csrow_size_show(struct csrow_info *csrow, char *data, int private)
|
|
{
|
|
return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
|
|
}
|
|
|
|
static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data, int private)
|
|
{
|
|
return sprintf(data,"%s\n", mem_types[csrow->mtype]);
|
|
}
|
|
|
|
static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data, int private)
|
|
{
|
|
return sprintf(data,"%s\n", dev_types[csrow->dtype]);
|
|
}
|
|
|
|
static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data, int private)
|
|
{
|
|
return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
|
|
}
|
|
|
|
/* show/store functions for DIMM Label attributes */
|
|
static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
|
|
char *data, int channel)
|
|
{
|
|
return snprintf(data, EDAC_MC_LABEL_LEN,"%s",
|
|
csrow->channels[channel].label);
|
|
}
|
|
|
|
static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
|
|
const char *data,
|
|
size_t count,
|
|
int channel)
|
|
{
|
|
ssize_t max_size = 0;
|
|
|
|
max_size = min((ssize_t)count,(ssize_t)EDAC_MC_LABEL_LEN-1);
|
|
strncpy(csrow->channels[channel].label, data, max_size);
|
|
csrow->channels[channel].label[max_size] = '\0';
|
|
|
|
return max_size;
|
|
}
|
|
|
|
/* show function for dynamic chX_ce_count attribute */
|
|
static ssize_t channel_ce_count_show(struct csrow_info *csrow,
|
|
char *data,
|
|
int channel)
|
|
{
|
|
return sprintf(data, "%u\n", csrow->channels[channel].ce_count);
|
|
}
|
|
|
|
/* csrow specific attribute structure */
|
|
struct csrowdev_attribute {
|
|
struct attribute attr;
|
|
ssize_t (*show)(struct csrow_info *,char *,int);
|
|
ssize_t (*store)(struct csrow_info *, const char *,size_t,int);
|
|
int private;
|
|
};
|
|
|
|
#define to_csrow(k) container_of(k, struct csrow_info, kobj)
|
|
#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
|
|
|
|
/* Set of show/store higher level functions for default csrow attributes */
|
|
static ssize_t csrowdev_show(struct kobject *kobj,
|
|
struct attribute *attr,
|
|
char *buffer)
|
|
{
|
|
struct csrow_info *csrow = to_csrow(kobj);
|
|
struct csrowdev_attribute *csrowdev_attr = to_csrowdev_attr(attr);
|
|
|
|
if (csrowdev_attr->show)
|
|
return csrowdev_attr->show(csrow,
|
|
buffer,
|
|
csrowdev_attr->private);
|
|
return -EIO;
|
|
}
|
|
|
|
static ssize_t csrowdev_store(struct kobject *kobj, struct attribute *attr,
|
|
const char *buffer, size_t count)
|
|
{
|
|
struct csrow_info *csrow = to_csrow(kobj);
|
|
struct csrowdev_attribute * csrowdev_attr = to_csrowdev_attr(attr);
|
|
|
|
if (csrowdev_attr->store)
|
|
return csrowdev_attr->store(csrow,
|
|
buffer,
|
|
count,
|
|
csrowdev_attr->private);
|
|
return -EIO;
|
|
}
|
|
|
|
static struct sysfs_ops csrowfs_ops = {
|
|
.show = csrowdev_show,
|
|
.store = csrowdev_store
|
|
};
|
|
|
|
#define CSROWDEV_ATTR(_name,_mode,_show,_store,_private) \
|
|
struct csrowdev_attribute attr_##_name = { \
|
|
.attr = {.name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
.private = _private, \
|
|
};
|
|
|
|
/* default cwrow<id>/attribute files */
|
|
CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL,0);
|
|
CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL,0);
|
|
CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL,0);
|
|
CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL,0);
|
|
CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL,0);
|
|
CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL,0);
|
|
|
|
/* default attributes of the CSROW<id> object */
|
|
static struct csrowdev_attribute *default_csrow_attr[] = {
|
|
&attr_dev_type,
|
|
&attr_mem_type,
|
|
&attr_edac_mode,
|
|
&attr_size_mb,
|
|
&attr_ue_count,
|
|
&attr_ce_count,
|
|
NULL,
|
|
};
|
|
|
|
|
|
/* possible dynamic channel DIMM Label attribute files */
|
|
CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
|
|
channel_dimm_label_show,
|
|
channel_dimm_label_store,
|
|
0 );
|
|
CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
|
|
channel_dimm_label_show,
|
|
channel_dimm_label_store,
|
|
1 );
|
|
CSROWDEV_ATTR(ch2_dimm_label,S_IRUGO|S_IWUSR,
|
|
channel_dimm_label_show,
|
|
channel_dimm_label_store,
|
|
2 );
|
|
CSROWDEV_ATTR(ch3_dimm_label,S_IRUGO|S_IWUSR,
|
|
channel_dimm_label_show,
|
|
channel_dimm_label_store,
|
|
3 );
|
|
CSROWDEV_ATTR(ch4_dimm_label,S_IRUGO|S_IWUSR,
|
|
channel_dimm_label_show,
|
|
channel_dimm_label_store,
|
|
4 );
|
|
CSROWDEV_ATTR(ch5_dimm_label,S_IRUGO|S_IWUSR,
|
|
channel_dimm_label_show,
|
|
channel_dimm_label_store,
|
|
5 );
|
|
|
|
/* Total possible dynamic DIMM Label attribute file table */
|
|
static struct csrowdev_attribute *dynamic_csrow_dimm_attr[] = {
|
|
&attr_ch0_dimm_label,
|
|
&attr_ch1_dimm_label,
|
|
&attr_ch2_dimm_label,
|
|
&attr_ch3_dimm_label,
|
|
&attr_ch4_dimm_label,
|
|
&attr_ch5_dimm_label
|
|
};
|
|
|
|
/* possible dynamic channel ce_count attribute files */
|
|
CSROWDEV_ATTR(ch0_ce_count,S_IRUGO|S_IWUSR,
|
|
channel_ce_count_show,
|
|
NULL,
|
|
0 );
|
|
CSROWDEV_ATTR(ch1_ce_count,S_IRUGO|S_IWUSR,
|
|
channel_ce_count_show,
|
|
NULL,
|
|
1 );
|
|
CSROWDEV_ATTR(ch2_ce_count,S_IRUGO|S_IWUSR,
|
|
channel_ce_count_show,
|
|
NULL,
|
|
2 );
|
|
CSROWDEV_ATTR(ch3_ce_count,S_IRUGO|S_IWUSR,
|
|
channel_ce_count_show,
|
|
NULL,
|
|
3 );
|
|
CSROWDEV_ATTR(ch4_ce_count,S_IRUGO|S_IWUSR,
|
|
channel_ce_count_show,
|
|
NULL,
|
|
4 );
|
|
CSROWDEV_ATTR(ch5_ce_count,S_IRUGO|S_IWUSR,
|
|
channel_ce_count_show,
|
|
NULL,
|
|
5 );
|
|
|
|
/* Total possible dynamic ce_count attribute file table */
|
|
static struct csrowdev_attribute *dynamic_csrow_ce_count_attr[] = {
|
|
&attr_ch0_ce_count,
|
|
&attr_ch1_ce_count,
|
|
&attr_ch2_ce_count,
|
|
&attr_ch3_ce_count,
|
|
&attr_ch4_ce_count,
|
|
&attr_ch5_ce_count
|
|
};
|
|
|
|
|
|
#define EDAC_NR_CHANNELS 6
|
|
|
|
/* Create dynamic CHANNEL files, indexed by 'chan', under specifed CSROW */
|
|
static int edac_create_channel_files(struct kobject *kobj, int chan)
|
|
{
|
|
int err=-ENODEV;
|
|
|
|
if (chan >= EDAC_NR_CHANNELS)
|
|
return err;
|
|
|
|
/* create the DIMM label attribute file */
|
|
err = sysfs_create_file(kobj,
|
|
(struct attribute *) dynamic_csrow_dimm_attr[chan]);
|
|
|
|
if (!err) {
|
|
/* create the CE Count attribute file */
|
|
err = sysfs_create_file(kobj,
|
|
(struct attribute *) dynamic_csrow_ce_count_attr[chan]);
|
|
} else {
|
|
debugf1("%s() dimm labels and ce_count files created", __func__);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/* No memory to release for this kobj */
|
|
static void edac_csrow_instance_release(struct kobject *kobj)
|
|
{
|
|
struct csrow_info *cs;
|
|
|
|
cs = container_of(kobj, struct csrow_info, kobj);
|
|
complete(&cs->kobj_complete);
|
|
}
|
|
|
|
/* the kobj_type instance for a CSROW */
|
|
static struct kobj_type ktype_csrow = {
|
|
.release = edac_csrow_instance_release,
|
|
.sysfs_ops = &csrowfs_ops,
|
|
.default_attrs = (struct attribute **) default_csrow_attr,
|
|
};
|
|
|
|
/* Create a CSROW object under specifed edac_mc_device */
|
|
static int edac_create_csrow_object(
|
|
struct kobject *edac_mci_kobj,
|
|
struct csrow_info *csrow,
|
|
int index)
|
|
{
|
|
int err = 0;
|
|
int chan;
|
|
|
|
memset(&csrow->kobj, 0, sizeof(csrow->kobj));
|
|
|
|
/* generate ..../edac/mc/mc<id>/csrow<index> */
|
|
|
|
csrow->kobj.parent = edac_mci_kobj;
|
|
csrow->kobj.ktype = &ktype_csrow;
|
|
|
|
/* name this instance of csrow<id> */
|
|
err = kobject_set_name(&csrow->kobj,"csrow%d",index);
|
|
if (err)
|
|
goto error_exit;
|
|
|
|
/* Instanstiate the csrow object */
|
|
err = kobject_register(&csrow->kobj);
|
|
if (!err) {
|
|
/* Create the dyanmic attribute files on this csrow,
|
|
* namely, the DIMM labels and the channel ce_count
|
|
*/
|
|
for (chan = 0; chan < csrow->nr_channels; chan++) {
|
|
err = edac_create_channel_files(&csrow->kobj,chan);
|
|
if (err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
error_exit:
|
|
return err;
|
|
}
|
|
|
|
/* default sysfs methods and data structures for the main MCI kobject */
|
|
|
|
static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
|
|
const char *data, size_t count)
|
|
{
|
|
int row, chan;
|
|
|
|
mci->ue_noinfo_count = 0;
|
|
mci->ce_noinfo_count = 0;
|
|
mci->ue_count = 0;
|
|
mci->ce_count = 0;
|
|
|
|
for (row = 0; row < mci->nr_csrows; row++) {
|
|
struct csrow_info *ri = &mci->csrows[row];
|
|
|
|
ri->ue_count = 0;
|
|
ri->ce_count = 0;
|
|
|
|
for (chan = 0; chan < ri->nr_channels; chan++)
|
|
ri->channels[chan].ce_count = 0;
|
|
}
|
|
|
|
mci->start_time = jiffies;
|
|
return count;
|
|
}
|
|
|
|
/* default attribute files for the MCI object */
|
|
static ssize_t mci_ue_count_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data,"%d\n", mci->ue_count);
|
|
}
|
|
|
|
static ssize_t mci_ce_count_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data,"%d\n", mci->ce_count);
|
|
}
|
|
|
|
static ssize_t mci_ce_noinfo_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data,"%d\n", mci->ce_noinfo_count);
|
|
}
|
|
|
|
static ssize_t mci_ue_noinfo_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data,"%d\n", mci->ue_noinfo_count);
|
|
}
|
|
|
|
static ssize_t mci_seconds_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data,"%ld\n", (jiffies - mci->start_time) / HZ);
|
|
}
|
|
|
|
static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
return sprintf(data,"%s\n", mci->ctl_name);
|
|
}
|
|
|
|
static ssize_t mci_size_mb_show(struct mem_ctl_info *mci, char *data)
|
|
{
|
|
int total_pages, csrow_idx;
|
|
|
|
for (total_pages = csrow_idx = 0; csrow_idx < mci->nr_csrows;
|
|
csrow_idx++) {
|
|
struct csrow_info *csrow = &mci->csrows[csrow_idx];
|
|
|
|
if (!csrow->nr_pages)
|
|
continue;
|
|
|
|
total_pages += csrow->nr_pages;
|
|
}
|
|
|
|
return sprintf(data,"%u\n", PAGES_TO_MiB(total_pages));
|
|
}
|
|
|
|
struct mcidev_attribute {
|
|
struct attribute attr;
|
|
ssize_t (*show)(struct mem_ctl_info *,char *);
|
|
ssize_t (*store)(struct mem_ctl_info *, const char *,size_t);
|
|
};
|
|
|
|
#define to_mci(k) container_of(k, struct mem_ctl_info, edac_mci_kobj)
|
|
#define to_mcidev_attr(a) container_of(a, struct mcidev_attribute, attr)
|
|
|
|
/* MCI show/store functions for top most object */
|
|
static ssize_t mcidev_show(struct kobject *kobj, struct attribute *attr,
|
|
char *buffer)
|
|
{
|
|
struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
|
|
struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
|
|
|
|
if (mcidev_attr->show)
|
|
return mcidev_attr->show(mem_ctl_info, buffer);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
static ssize_t mcidev_store(struct kobject *kobj, struct attribute *attr,
|
|
const char *buffer, size_t count)
|
|
{
|
|
struct mem_ctl_info *mem_ctl_info = to_mci(kobj);
|
|
struct mcidev_attribute * mcidev_attr = to_mcidev_attr(attr);
|
|
|
|
if (mcidev_attr->store)
|
|
return mcidev_attr->store(mem_ctl_info, buffer, count);
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
static struct sysfs_ops mci_ops = {
|
|
.show = mcidev_show,
|
|
.store = mcidev_store
|
|
};
|
|
|
|
#define MCIDEV_ATTR(_name,_mode,_show,_store) \
|
|
struct mcidev_attribute mci_attr_##_name = { \
|
|
.attr = {.name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
};
|
|
|
|
/* default Control file */
|
|
MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
|
|
|
|
/* default Attribute files */
|
|
MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL);
|
|
MCIDEV_ATTR(size_mb,S_IRUGO,mci_size_mb_show,NULL);
|
|
MCIDEV_ATTR(seconds_since_reset,S_IRUGO,mci_seconds_show,NULL);
|
|
MCIDEV_ATTR(ue_noinfo_count,S_IRUGO,mci_ue_noinfo_show,NULL);
|
|
MCIDEV_ATTR(ce_noinfo_count,S_IRUGO,mci_ce_noinfo_show,NULL);
|
|
MCIDEV_ATTR(ue_count,S_IRUGO,mci_ue_count_show,NULL);
|
|
MCIDEV_ATTR(ce_count,S_IRUGO,mci_ce_count_show,NULL);
|
|
|
|
static struct mcidev_attribute *mci_attr[] = {
|
|
&mci_attr_reset_counters,
|
|
&mci_attr_mc_name,
|
|
&mci_attr_size_mb,
|
|
&mci_attr_seconds_since_reset,
|
|
&mci_attr_ue_noinfo_count,
|
|
&mci_attr_ce_noinfo_count,
|
|
&mci_attr_ue_count,
|
|
&mci_attr_ce_count,
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* Release of a MC controlling instance
|
|
*/
|
|
static void edac_mci_instance_release(struct kobject *kobj)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
|
|
mci = to_mci(kobj);
|
|
debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
|
|
complete(&mci->kobj_complete);
|
|
}
|
|
|
|
static struct kobj_type ktype_mci = {
|
|
.release = edac_mci_instance_release,
|
|
.sysfs_ops = &mci_ops,
|
|
.default_attrs = (struct attribute **) mci_attr,
|
|
};
|
|
|
|
|
|
#define EDAC_DEVICE_SYMLINK "device"
|
|
|
|
/*
|
|
* Create a new Memory Controller kobject instance,
|
|
* mc<id> under the 'mc' directory
|
|
*
|
|
* Return:
|
|
* 0 Success
|
|
* !0 Failure
|
|
*/
|
|
static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
|
|
{
|
|
int i;
|
|
int err;
|
|
struct csrow_info *csrow;
|
|
struct kobject *edac_mci_kobj=&mci->edac_mci_kobj;
|
|
|
|
debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
|
|
memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj));
|
|
|
|
/* set the name of the mc<id> object */
|
|
err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx);
|
|
if (err)
|
|
return err;
|
|
|
|
/* link to our parent the '..../edac/mc' object */
|
|
edac_mci_kobj->parent = &edac_memctrl_kobj;
|
|
edac_mci_kobj->ktype = &ktype_mci;
|
|
|
|
/* register the mc<id> kobject */
|
|
err = kobject_register(edac_mci_kobj);
|
|
if (err)
|
|
return err;
|
|
|
|
/* create a symlink for the device */
|
|
err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj,
|
|
EDAC_DEVICE_SYMLINK);
|
|
if (err)
|
|
goto fail0;
|
|
|
|
/* Make directories for each CSROW object
|
|
* under the mc<id> kobject
|
|
*/
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
csrow = &mci->csrows[i];
|
|
|
|
/* Only expose populated CSROWs */
|
|
if (csrow->nr_pages > 0) {
|
|
err = edac_create_csrow_object(edac_mci_kobj,csrow,i);
|
|
if (err)
|
|
goto fail1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
/* CSROW error: backout what has already been registered, */
|
|
fail1:
|
|
for ( i--; i >= 0; i--) {
|
|
if (csrow->nr_pages > 0) {
|
|
init_completion(&csrow->kobj_complete);
|
|
kobject_unregister(&mci->csrows[i].kobj);
|
|
wait_for_completion(&csrow->kobj_complete);
|
|
}
|
|
}
|
|
|
|
fail0:
|
|
init_completion(&mci->kobj_complete);
|
|
kobject_unregister(edac_mci_kobj);
|
|
wait_for_completion(&mci->kobj_complete);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* remove a Memory Controller instance
|
|
*/
|
|
static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
|
|
{
|
|
int i;
|
|
|
|
debugf0("%s()\n", __func__);
|
|
|
|
/* remove all csrow kobjects */
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
if (mci->csrows[i].nr_pages > 0) {
|
|
init_completion(&mci->csrows[i].kobj_complete);
|
|
kobject_unregister(&mci->csrows[i].kobj);
|
|
wait_for_completion(&mci->csrows[i].kobj_complete);
|
|
}
|
|
}
|
|
|
|
sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
|
|
init_completion(&mci->kobj_complete);
|
|
kobject_unregister(&mci->edac_mci_kobj);
|
|
wait_for_completion(&mci->kobj_complete);
|
|
}
|
|
|
|
/* END OF sysfs data and methods */
|
|
|
|
#ifdef CONFIG_EDAC_DEBUG
|
|
|
|
void edac_mc_dump_channel(struct channel_info *chan)
|
|
{
|
|
debugf4("\tchannel = %p\n", chan);
|
|
debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx);
|
|
debugf4("\tchannel->ce_count = %d\n", chan->ce_count);
|
|
debugf4("\tchannel->label = '%s'\n", chan->label);
|
|
debugf4("\tchannel->csrow = %p\n\n", chan->csrow);
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_dump_channel);
|
|
|
|
void edac_mc_dump_csrow(struct csrow_info *csrow)
|
|
{
|
|
debugf4("\tcsrow = %p\n", csrow);
|
|
debugf4("\tcsrow->csrow_idx = %d\n", csrow->csrow_idx);
|
|
debugf4("\tcsrow->first_page = 0x%lx\n",
|
|
csrow->first_page);
|
|
debugf4("\tcsrow->last_page = 0x%lx\n", csrow->last_page);
|
|
debugf4("\tcsrow->page_mask = 0x%lx\n", csrow->page_mask);
|
|
debugf4("\tcsrow->nr_pages = 0x%x\n", csrow->nr_pages);
|
|
debugf4("\tcsrow->nr_channels = %d\n",
|
|
csrow->nr_channels);
|
|
debugf4("\tcsrow->channels = %p\n", csrow->channels);
|
|
debugf4("\tcsrow->mci = %p\n\n", csrow->mci);
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_dump_csrow);
|
|
|
|
void edac_mc_dump_mci(struct mem_ctl_info *mci)
|
|
{
|
|
debugf3("\tmci = %p\n", mci);
|
|
debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap);
|
|
debugf3("\tmci->edac_ctl_cap = %lx\n", mci->edac_ctl_cap);
|
|
debugf3("\tmci->edac_cap = %lx\n", mci->edac_cap);
|
|
debugf4("\tmci->edac_check = %p\n", mci->edac_check);
|
|
debugf3("\tmci->nr_csrows = %d, csrows = %p\n",
|
|
mci->nr_csrows, mci->csrows);
|
|
debugf3("\tdev = %p\n", mci->dev);
|
|
debugf3("\tmod_name:ctl_name = %s:%s\n",
|
|
mci->mod_name, mci->ctl_name);
|
|
debugf3("\tpvt_info = %p\n\n", mci->pvt_info);
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_dump_mci);
|
|
|
|
#endif /* CONFIG_EDAC_DEBUG */
|
|
|
|
/* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'.
|
|
* Adjust 'ptr' so that its alignment is at least as stringent as what the
|
|
* compiler would provide for X and return the aligned result.
|
|
*
|
|
* If 'size' is a constant, the compiler will optimize this whole function
|
|
* down to either a no-op or the addition of a constant to the value of 'ptr'.
|
|
*/
|
|
static inline char * align_ptr(void *ptr, unsigned size)
|
|
{
|
|
unsigned align, r;
|
|
|
|
/* Here we assume that the alignment of a "long long" is the most
|
|
* stringent alignment that the compiler will ever provide by default.
|
|
* As far as I know, this is a reasonable assumption.
|
|
*/
|
|
if (size > sizeof(long))
|
|
align = sizeof(long long);
|
|
else if (size > sizeof(int))
|
|
align = sizeof(long);
|
|
else if (size > sizeof(short))
|
|
align = sizeof(int);
|
|
else if (size > sizeof(char))
|
|
align = sizeof(short);
|
|
else
|
|
return (char *) ptr;
|
|
|
|
r = size % align;
|
|
|
|
if (r == 0)
|
|
return (char *) ptr;
|
|
|
|
return (char *) (((unsigned long) ptr) + align - r);
|
|
}
|
|
|
|
/**
|
|
* edac_mc_alloc: Allocate a struct mem_ctl_info structure
|
|
* @size_pvt: size of private storage needed
|
|
* @nr_csrows: Number of CWROWS needed for this MC
|
|
* @nr_chans: Number of channels for the MC
|
|
*
|
|
* Everything is kmalloc'ed as one big chunk - more efficient.
|
|
* Only can be used if all structures have the same lifetime - otherwise
|
|
* you have to allocate and initialize your own structures.
|
|
*
|
|
* Use edac_mc_free() to free mc structures allocated by this function.
|
|
*
|
|
* Returns:
|
|
* NULL allocation failed
|
|
* struct mem_ctl_info pointer
|
|
*/
|
|
struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
|
|
unsigned nr_chans)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
struct csrow_info *csi, *csrow;
|
|
struct channel_info *chi, *chp, *chan;
|
|
void *pvt;
|
|
unsigned size;
|
|
int row, chn;
|
|
|
|
/* Figure out the offsets of the various items from the start of an mc
|
|
* structure. We want the alignment of each item to be at least as
|
|
* stringent as what the compiler would provide if we could simply
|
|
* hardcode everything into a single struct.
|
|
*/
|
|
mci = (struct mem_ctl_info *) 0;
|
|
csi = (struct csrow_info *)align_ptr(&mci[1], sizeof(*csi));
|
|
chi = (struct channel_info *)
|
|
align_ptr(&csi[nr_csrows], sizeof(*chi));
|
|
pvt = align_ptr(&chi[nr_chans * nr_csrows], sz_pvt);
|
|
size = ((unsigned long) pvt) + sz_pvt;
|
|
|
|
if ((mci = kmalloc(size, GFP_KERNEL)) == NULL)
|
|
return NULL;
|
|
|
|
/* Adjust pointers so they point within the memory we just allocated
|
|
* rather than an imaginary chunk of memory located at address 0.
|
|
*/
|
|
csi = (struct csrow_info *) (((char *) mci) + ((unsigned long) csi));
|
|
chi = (struct channel_info *) (((char *) mci) + ((unsigned long) chi));
|
|
pvt = sz_pvt ? (((char *) mci) + ((unsigned long) pvt)) : NULL;
|
|
|
|
memset(mci, 0, size); /* clear all fields */
|
|
mci->csrows = csi;
|
|
mci->pvt_info = pvt;
|
|
mci->nr_csrows = nr_csrows;
|
|
|
|
for (row = 0; row < nr_csrows; row++) {
|
|
csrow = &csi[row];
|
|
csrow->csrow_idx = row;
|
|
csrow->mci = mci;
|
|
csrow->nr_channels = nr_chans;
|
|
chp = &chi[row * nr_chans];
|
|
csrow->channels = chp;
|
|
|
|
for (chn = 0; chn < nr_chans; chn++) {
|
|
chan = &chp[chn];
|
|
chan->chan_idx = chn;
|
|
chan->csrow = csrow;
|
|
}
|
|
}
|
|
|
|
return mci;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_alloc);
|
|
|
|
/**
|
|
* edac_mc_free: Free a previously allocated 'mci' structure
|
|
* @mci: pointer to a struct mem_ctl_info structure
|
|
*/
|
|
void edac_mc_free(struct mem_ctl_info *mci)
|
|
{
|
|
kfree(mci);
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_free);
|
|
|
|
static struct mem_ctl_info *find_mci_by_dev(struct device *dev)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
struct list_head *item;
|
|
|
|
debugf3("%s()\n", __func__);
|
|
|
|
list_for_each(item, &mc_devices) {
|
|
mci = list_entry(item, struct mem_ctl_info, link);
|
|
|
|
if (mci->dev == dev)
|
|
return mci;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Return 0 on success, 1 on failure.
|
|
* Before calling this function, caller must
|
|
* assign a unique value to mci->mc_idx.
|
|
*/
|
|
static int add_mc_to_global_list (struct mem_ctl_info *mci)
|
|
{
|
|
struct list_head *item, *insert_before;
|
|
struct mem_ctl_info *p;
|
|
|
|
insert_before = &mc_devices;
|
|
|
|
if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL))
|
|
goto fail0;
|
|
|
|
list_for_each(item, &mc_devices) {
|
|
p = list_entry(item, struct mem_ctl_info, link);
|
|
|
|
if (p->mc_idx >= mci->mc_idx) {
|
|
if (unlikely(p->mc_idx == mci->mc_idx))
|
|
goto fail1;
|
|
|
|
insert_before = item;
|
|
break;
|
|
}
|
|
}
|
|
|
|
list_add_tail_rcu(&mci->link, insert_before);
|
|
return 0;
|
|
|
|
fail0:
|
|
edac_printk(KERN_WARNING, EDAC_MC,
|
|
"%s (%s) %s %s already assigned %d\n", p->dev->bus_id,
|
|
dev_name(p->dev), p->mod_name, p->ctl_name, p->mc_idx);
|
|
return 1;
|
|
|
|
fail1:
|
|
edac_printk(KERN_WARNING, EDAC_MC,
|
|
"bug in low-level driver: attempt to assign\n"
|
|
" duplicate mc_idx %d in %s()\n", p->mc_idx, __func__);
|
|
return 1;
|
|
}
|
|
|
|
static void complete_mc_list_del(struct rcu_head *head)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
|
|
mci = container_of(head, struct mem_ctl_info, rcu);
|
|
INIT_LIST_HEAD(&mci->link);
|
|
complete(&mci->complete);
|
|
}
|
|
|
|
static void del_mc_from_global_list(struct mem_ctl_info *mci)
|
|
{
|
|
list_del_rcu(&mci->link);
|
|
init_completion(&mci->complete);
|
|
call_rcu(&mci->rcu, complete_mc_list_del);
|
|
wait_for_completion(&mci->complete);
|
|
}
|
|
|
|
/**
|
|
* edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
|
|
* create sysfs entries associated with mci structure
|
|
* @mci: pointer to the mci structure to be added to the list
|
|
* @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure.
|
|
*
|
|
* Return:
|
|
* 0 Success
|
|
* !0 Failure
|
|
*/
|
|
|
|
/* FIXME - should a warning be printed if no error detection? correction? */
|
|
int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx)
|
|
{
|
|
debugf0("%s()\n", __func__);
|
|
mci->mc_idx = mc_idx;
|
|
#ifdef CONFIG_EDAC_DEBUG
|
|
if (edac_debug_level >= 3)
|
|
edac_mc_dump_mci(mci);
|
|
|
|
if (edac_debug_level >= 4) {
|
|
int i;
|
|
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
int j;
|
|
|
|
edac_mc_dump_csrow(&mci->csrows[i]);
|
|
for (j = 0; j < mci->csrows[i].nr_channels; j++)
|
|
edac_mc_dump_channel(
|
|
&mci->csrows[i].channels[j]);
|
|
}
|
|
}
|
|
#endif
|
|
down(&mem_ctls_mutex);
|
|
|
|
if (add_mc_to_global_list(mci))
|
|
goto fail0;
|
|
|
|
/* set load time so that error rate can be tracked */
|
|
mci->start_time = jiffies;
|
|
|
|
if (edac_create_sysfs_mci_device(mci)) {
|
|
edac_mc_printk(mci, KERN_WARNING,
|
|
"failed to create sysfs device\n");
|
|
goto fail1;
|
|
}
|
|
|
|
/* Report action taken */
|
|
edac_mc_printk(mci, KERN_INFO, "Giving out device to %s %s: DEV %s\n",
|
|
mci->mod_name, mci->ctl_name, dev_name(mci->dev));
|
|
|
|
up(&mem_ctls_mutex);
|
|
return 0;
|
|
|
|
fail1:
|
|
del_mc_from_global_list(mci);
|
|
|
|
fail0:
|
|
up(&mem_ctls_mutex);
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_add_mc);
|
|
|
|
/**
|
|
* edac_mc_del_mc: Remove sysfs entries for specified mci structure and
|
|
* remove mci structure from global list
|
|
* @pdev: Pointer to 'struct device' representing mci structure to remove.
|
|
*
|
|
* Return pointer to removed mci structure, or NULL if device not found.
|
|
*/
|
|
struct mem_ctl_info * edac_mc_del_mc(struct device *dev)
|
|
{
|
|
struct mem_ctl_info *mci;
|
|
|
|
debugf0("MC: %s()\n", __func__);
|
|
down(&mem_ctls_mutex);
|
|
|
|
if ((mci = find_mci_by_dev(dev)) == NULL) {
|
|
up(&mem_ctls_mutex);
|
|
return NULL;
|
|
}
|
|
|
|
edac_remove_sysfs_mci_device(mci);
|
|
del_mc_from_global_list(mci);
|
|
up(&mem_ctls_mutex);
|
|
edac_printk(KERN_INFO, EDAC_MC,
|
|
"Removed device %d for %s %s: DEV %s\n", mci->mc_idx,
|
|
mci->mod_name, mci->ctl_name, dev_name(mci->dev));
|
|
return mci;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_del_mc);
|
|
|
|
void edac_mc_scrub_block(unsigned long page, unsigned long offset, u32 size)
|
|
{
|
|
struct page *pg;
|
|
void *virt_addr;
|
|
unsigned long flags = 0;
|
|
|
|
debugf3("%s()\n", __func__);
|
|
|
|
/* ECC error page was not in our memory. Ignore it. */
|
|
if(!pfn_valid(page))
|
|
return;
|
|
|
|
/* Find the actual page structure then map it and fix */
|
|
pg = pfn_to_page(page);
|
|
|
|
if (PageHighMem(pg))
|
|
local_irq_save(flags);
|
|
|
|
virt_addr = kmap_atomic(pg, KM_BOUNCE_READ);
|
|
|
|
/* Perform architecture specific atomic scrub operation */
|
|
atomic_scrub(virt_addr + offset, size);
|
|
|
|
/* Unmap and complete */
|
|
kunmap_atomic(virt_addr, KM_BOUNCE_READ);
|
|
|
|
if (PageHighMem(pg))
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_scrub_block);
|
|
|
|
/* FIXME - should return -1 */
|
|
int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci, unsigned long page)
|
|
{
|
|
struct csrow_info *csrows = mci->csrows;
|
|
int row, i;
|
|
|
|
debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page);
|
|
row = -1;
|
|
|
|
for (i = 0; i < mci->nr_csrows; i++) {
|
|
struct csrow_info *csrow = &csrows[i];
|
|
|
|
if (csrow->nr_pages == 0)
|
|
continue;
|
|
|
|
debugf3("MC%d: %s(): first(0x%lx) page(0x%lx) last(0x%lx) "
|
|
"mask(0x%lx)\n", mci->mc_idx, __func__,
|
|
csrow->first_page, page, csrow->last_page,
|
|
csrow->page_mask);
|
|
|
|
if ((page >= csrow->first_page) &&
|
|
(page <= csrow->last_page) &&
|
|
((page & csrow->page_mask) ==
|
|
(csrow->first_page & csrow->page_mask))) {
|
|
row = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (row == -1)
|
|
edac_mc_printk(mci, KERN_ERR,
|
|
"could not look up page error address %lx\n",
|
|
(unsigned long) page);
|
|
|
|
return row;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page);
|
|
|
|
/* FIXME - setable log (warning/emerg) levels */
|
|
/* FIXME - integrate with evlog: http://evlog.sourceforge.net/ */
|
|
void edac_mc_handle_ce(struct mem_ctl_info *mci,
|
|
unsigned long page_frame_number, unsigned long offset_in_page,
|
|
unsigned long syndrome, int row, int channel, const char *msg)
|
|
{
|
|
unsigned long remapped_page;
|
|
|
|
debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
|
|
|
|
/* FIXME - maybe make panic on INTERNAL ERROR an option */
|
|
if (row >= mci->nr_csrows || row < 0) {
|
|
/* something is wrong */
|
|
edac_mc_printk(mci, KERN_ERR,
|
|
"INTERNAL ERROR: row out of range "
|
|
"(%d >= %d)\n", row, mci->nr_csrows);
|
|
edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
|
|
return;
|
|
}
|
|
|
|
if (channel >= mci->csrows[row].nr_channels || channel < 0) {
|
|
/* something is wrong */
|
|
edac_mc_printk(mci, KERN_ERR,
|
|
"INTERNAL ERROR: channel out of range "
|
|
"(%d >= %d)\n", channel,
|
|
mci->csrows[row].nr_channels);
|
|
edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
|
|
return;
|
|
}
|
|
|
|
if (log_ce)
|
|
/* FIXME - put in DIMM location */
|
|
edac_mc_printk(mci, KERN_WARNING,
|
|
"CE page 0x%lx, offset 0x%lx, grain %d, syndrome "
|
|
"0x%lx, row %d, channel %d, label \"%s\": %s\n",
|
|
page_frame_number, offset_in_page,
|
|
mci->csrows[row].grain, syndrome, row, channel,
|
|
mci->csrows[row].channels[channel].label, msg);
|
|
|
|
mci->ce_count++;
|
|
mci->csrows[row].ce_count++;
|
|
mci->csrows[row].channels[channel].ce_count++;
|
|
|
|
if (mci->scrub_mode & SCRUB_SW_SRC) {
|
|
/*
|
|
* Some MC's can remap memory so that it is still available
|
|
* at a different address when PCI devices map into memory.
|
|
* MC's that can't do this lose the memory where PCI devices
|
|
* are mapped. This mapping is MC dependant and so we call
|
|
* back into the MC driver for it to map the MC page to
|
|
* a physical (CPU) page which can then be mapped to a virtual
|
|
* page - which can then be scrubbed.
|
|
*/
|
|
remapped_page = mci->ctl_page_to_phys ?
|
|
mci->ctl_page_to_phys(mci, page_frame_number) :
|
|
page_frame_number;
|
|
|
|
edac_mc_scrub_block(remapped_page, offset_in_page,
|
|
mci->csrows[row].grain);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_handle_ce);
|
|
|
|
void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg)
|
|
{
|
|
if (log_ce)
|
|
edac_mc_printk(mci, KERN_WARNING,
|
|
"CE - no information available: %s\n", msg);
|
|
|
|
mci->ce_noinfo_count++;
|
|
mci->ce_count++;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info);
|
|
|
|
void edac_mc_handle_ue(struct mem_ctl_info *mci,
|
|
unsigned long page_frame_number, unsigned long offset_in_page,
|
|
int row, const char *msg)
|
|
{
|
|
int len = EDAC_MC_LABEL_LEN * 4;
|
|
char labels[len + 1];
|
|
char *pos = labels;
|
|
int chan;
|
|
int chars;
|
|
|
|
debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
|
|
|
|
/* FIXME - maybe make panic on INTERNAL ERROR an option */
|
|
if (row >= mci->nr_csrows || row < 0) {
|
|
/* something is wrong */
|
|
edac_mc_printk(mci, KERN_ERR,
|
|
"INTERNAL ERROR: row out of range "
|
|
"(%d >= %d)\n", row, mci->nr_csrows);
|
|
edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
|
|
return;
|
|
}
|
|
|
|
chars = snprintf(pos, len + 1, "%s",
|
|
mci->csrows[row].channels[0].label);
|
|
len -= chars;
|
|
pos += chars;
|
|
|
|
for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0);
|
|
chan++) {
|
|
chars = snprintf(pos, len + 1, ":%s",
|
|
mci->csrows[row].channels[chan].label);
|
|
len -= chars;
|
|
pos += chars;
|
|
}
|
|
|
|
if (log_ue)
|
|
edac_mc_printk(mci, KERN_EMERG,
|
|
"UE page 0x%lx, offset 0x%lx, grain %d, row %d, "
|
|
"labels \"%s\": %s\n", page_frame_number,
|
|
offset_in_page, mci->csrows[row].grain, row, labels,
|
|
msg);
|
|
|
|
if (panic_on_ue)
|
|
panic("EDAC MC%d: UE page 0x%lx, offset 0x%lx, grain %d, "
|
|
"row %d, labels \"%s\": %s\n", mci->mc_idx,
|
|
page_frame_number, offset_in_page,
|
|
mci->csrows[row].grain, row, labels, msg);
|
|
|
|
mci->ue_count++;
|
|
mci->csrows[row].ue_count++;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_handle_ue);
|
|
|
|
void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg)
|
|
{
|
|
if (panic_on_ue)
|
|
panic("EDAC MC%d: Uncorrected Error", mci->mc_idx);
|
|
|
|
if (log_ue)
|
|
edac_mc_printk(mci, KERN_WARNING,
|
|
"UE - no information available: %s\n", msg);
|
|
mci->ue_noinfo_count++;
|
|
mci->ue_count++;
|
|
}
|
|
EXPORT_SYMBOL_GPL(edac_mc_handle_ue_no_info);
|
|
|
|
|
|
/*
|
|
* Iterate over all MC instances and check for ECC, et al, errors
|
|
*/
|
|
static inline void check_mc_devices(void)
|
|
{
|
|
struct list_head *item;
|
|
struct mem_ctl_info *mci;
|
|
|
|
debugf3("%s()\n", __func__);
|
|
down(&mem_ctls_mutex);
|
|
|
|
list_for_each(item, &mc_devices) {
|
|
mci = list_entry(item, struct mem_ctl_info, link);
|
|
|
|
if (mci->edac_check != NULL)
|
|
mci->edac_check(mci);
|
|
}
|
|
|
|
up(&mem_ctls_mutex);
|
|
}
|
|
|
|
/*
|
|
* Check MC status every poll_msec.
|
|
* Check PCI status every poll_msec as well.
|
|
*
|
|
* This where the work gets done for edac.
|
|
*
|
|
* SMP safe, doesn't use NMI, and auto-rate-limits.
|
|
*/
|
|
static void do_edac_check(void)
|
|
{
|
|
debugf3("%s()\n", __func__);
|
|
check_mc_devices();
|
|
do_pci_parity_check();
|
|
}
|
|
|
|
static int edac_kernel_thread(void *arg)
|
|
{
|
|
while (!kthread_should_stop()) {
|
|
do_edac_check();
|
|
|
|
/* goto sleep for the interval */
|
|
schedule_timeout_interruptible((HZ * poll_msec) / 1000);
|
|
try_to_freeze();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* edac_mc_init
|
|
* module initialization entry point
|
|
*/
|
|
static int __init edac_mc_init(void)
|
|
{
|
|
edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n");
|
|
|
|
/*
|
|
* Harvest and clear any boot/initialization PCI parity errors
|
|
*
|
|
* FIXME: This only clears errors logged by devices present at time of
|
|
* module initialization. We should also do an initial clear
|
|
* of each newly hotplugged device.
|
|
*/
|
|
clear_pci_parity_errors();
|
|
|
|
/* Create the MC sysfs entries */
|
|
if (edac_sysfs_memctrl_setup()) {
|
|
edac_printk(KERN_ERR, EDAC_MC,
|
|
"Error initializing sysfs code\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Create the PCI parity sysfs entries */
|
|
if (edac_sysfs_pci_setup()) {
|
|
edac_sysfs_memctrl_teardown();
|
|
edac_printk(KERN_ERR, EDAC_MC,
|
|
"EDAC PCI: Error initializing sysfs code\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* create our kernel thread */
|
|
edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac");
|
|
|
|
if (IS_ERR(edac_thread)) {
|
|
/* remove the sysfs entries */
|
|
edac_sysfs_memctrl_teardown();
|
|
edac_sysfs_pci_teardown();
|
|
return PTR_ERR(edac_thread);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* edac_mc_exit()
|
|
* module exit/termination functioni
|
|
*/
|
|
static void __exit edac_mc_exit(void)
|
|
{
|
|
debugf0("%s()\n", __func__);
|
|
kthread_stop(edac_thread);
|
|
|
|
/* tear down the sysfs device */
|
|
edac_sysfs_memctrl_teardown();
|
|
edac_sysfs_pci_teardown();
|
|
}
|
|
|
|
module_init(edac_mc_init);
|
|
module_exit(edac_mc_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Linux Networx (http://lnxi.com) Thayne Harbaugh et al\n"
|
|
"Based on work by Dan Hollis et al");
|
|
MODULE_DESCRIPTION("Core library routines for MC reporting");
|
|
|
|
module_param(panic_on_ue, int, 0644);
|
|
MODULE_PARM_DESC(panic_on_ue, "Panic on uncorrected error: 0=off 1=on");
|
|
#ifdef CONFIG_PCI
|
|
module_param(check_pci_parity, int, 0644);
|
|
MODULE_PARM_DESC(check_pci_parity, "Check for PCI bus parity errors: 0=off 1=on");
|
|
module_param(panic_on_pci_parity, int, 0644);
|
|
MODULE_PARM_DESC(panic_on_pci_parity, "Panic on PCI Bus Parity error: 0=off 1=on");
|
|
#endif
|
|
module_param(log_ue, int, 0644);
|
|
MODULE_PARM_DESC(log_ue, "Log uncorrectable error to console: 0=off 1=on");
|
|
module_param(log_ce, int, 0644);
|
|
MODULE_PARM_DESC(log_ce, "Log correctable error to console: 0=off 1=on");
|
|
module_param(poll_msec, int, 0644);
|
|
MODULE_PARM_DESC(poll_msec, "Polling period in milliseconds");
|
|
#ifdef CONFIG_EDAC_DEBUG
|
|
module_param(edac_debug_level, int, 0644);
|
|
MODULE_PARM_DESC(edac_debug_level, "Debug level");
|
|
#endif
|