/*
* edac_mc kernel module
- * (C) 2005 Linux Networx (http://lnxi.com)
+ * (C) 2005, 2006 Linux Networx (http://lnxi.com)
* This file may be distributed under the terms of the
* GNU General Public License.
*
*
*/
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/sysctl.h>
+#include <linux/highmem.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/sysdev.h>
+#include <linux/ctype.h>
+#include <linux/edac.h>
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/edac.h>
+#include "edac_core.h"
+#include "edac_module.h"
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/proc_fs.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/smp.h>
-#include <linux/init.h>
-#include <linux/sysctl.h>
-#include <linux/highmem.h>
-#include <linux/timer.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-#include <linux/sysdev.h>
-#include <linux/ctype.h>
-
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/edac.h>
-
-#include "edac_mc.h"
-
-#define EDAC_MC_VERSION "edac_mc Ver: 2.0.0 " __DATE__
-
-#ifdef CONFIG_EDAC_DEBUG
-/* Values of 0 to 4 will generate output */
-int edac_debug_level = 1;
-EXPORT_SYMBOL(edac_debug_level);
-#endif
-
-/* EDAC Controls, setable by module parameter, and sysfs */
-static int log_ue = 1;
-static int log_ce = 1;
-static int panic_on_ue = 1;
-static int poll_msec = 1000;
-
-static int check_pci_parity = 0; /* default YES check PCI parity */
-static int panic_on_pci_parity; /* default no panic on PCI Parity */
-static atomic_t pci_parity_count = ATOMIC_INIT(0);
-
-/* lock to memory controller's control array */
-static DECLARE_MUTEX(mem_ctls_mutex);
-static struct list_head mc_devices = LIST_HEAD_INIT(mc_devices);
-
-/* Structure of the whitelist and blacklist arrays */
-struct edac_pci_device_list {
- unsigned int vendor; /* Vendor ID */
- unsigned int device; /* Deviice ID */
-};
-
-
-#define MAX_LISTED_PCI_DEVICES 32
-
-/* List of PCI devices (vendor-id:device-id) that should be skipped */
-static struct edac_pci_device_list pci_blacklist[MAX_LISTED_PCI_DEVICES];
-static int pci_blacklist_count;
-
-/* List of PCI devices (vendor-id:device-id) that should be scanned */
-static struct edac_pci_device_list pci_whitelist[MAX_LISTED_PCI_DEVICES];
-static int pci_whitelist_count ;
-
-/* START sysfs data and methods */
-
-static const char *mem_types[] = {
- [MEM_EMPTY] = "Empty",
- [MEM_RESERVED] = "Reserved",
- [MEM_UNKNOWN] = "Unknown",
- [MEM_FPM] = "FPM",
- [MEM_EDO] = "EDO",
- [MEM_BEDO] = "BEDO",
- [MEM_SDR] = "Unbuffered-SDR",
- [MEM_RDR] = "Registered-SDR",
- [MEM_DDR] = "Unbuffered-DDR",
- [MEM_RDDR] = "Registered-DDR",
- [MEM_RMBS] = "RMBS"
-};
-
-static const char *dev_types[] = {
- [DEV_UNKNOWN] = "Unknown",
- [DEV_X1] = "x1",
- [DEV_X2] = "x2",
- [DEV_X4] = "x4",
- [DEV_X8] = "x8",
- [DEV_X16] = "x16",
- [DEV_X32] = "x32",
- [DEV_X64] = "x64"
-};
-
-static const char *edac_caps[] = {
- [EDAC_UNKNOWN] = "Unknown",
- [EDAC_NONE] = "None",
- [EDAC_RESERVED] = "Reserved",
- [EDAC_PARITY] = "PARITY",
- [EDAC_EC] = "EC",
- [EDAC_SECDED] = "SECDED",
- [EDAC_S2ECD2ED] = "S2ECD2ED",
- [EDAC_S4ECD4ED] = "S4ECD4ED",
- [EDAC_S8ECD8ED] = "S8ECD8ED",
- [EDAC_S16ECD16ED] = "S16ECD16ED"
-};
-
-
-/* sysfs object: /sys/devices/system/edac */
-static struct sysdev_class edac_class = {
- set_kset_name("edac"),
-};
-
-/* sysfs objects:
- * /sys/devices/system/edac/mc
- * /sys/devices/system/edac/pci
- */
-static struct kobject edac_memctrl_kobj;
-static struct kobject edac_pci_kobj;
-
-/*
- * /sys/devices/system/edac/mc;
- * data structures and methods
- */
-static ssize_t memctrl_string_show(void *ptr, char *buffer)
-{
- char *value = (char*) ptr;
- return sprintf(buffer, "%s\n", value);
-}
-
-static ssize_t memctrl_int_show(void *ptr, char *buffer)
-{
- int *value = (int*) ptr;
- return sprintf(buffer, "%d\n", *value);
-}
-
-static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
-{
- int *value = (int*) ptr;
-
- if (isdigit(*buffer))
- *value = simple_strtoul(buffer, NULL, 0);
-
- return count;
-}
-
-struct memctrl_dev_attribute {
- struct attribute attr;
- void *value;
- ssize_t (*show)(void *,char *);
- ssize_t (*store)(void *, const char *, size_t);
-};
-
-/* Set of show/store abstract level functions for memory control object */
-static ssize_t
-memctrl_dev_show(struct kobject *kobj, struct attribute *attr, char *buffer)
-{
- struct memctrl_dev_attribute *memctrl_dev;
- memctrl_dev = (struct memctrl_dev_attribute*)attr;
-
- if (memctrl_dev->show)
- return memctrl_dev->show(memctrl_dev->value, buffer);
- return -EIO;
-}
-
-static ssize_t
-memctrl_dev_store(struct kobject *kobj, struct attribute *attr,
- const char *buffer, size_t count)
-{
- struct memctrl_dev_attribute *memctrl_dev;
- memctrl_dev = (struct memctrl_dev_attribute*)attr;
-
- if (memctrl_dev->store)
- return memctrl_dev->store(memctrl_dev->value, buffer, count);
- return -EIO;
-}
-
-static struct sysfs_ops memctrlfs_ops = {
- .show = memctrl_dev_show,
- .store = memctrl_dev_store
-};
-
-#define MEMCTRL_ATTR(_name,_mode,_show,_store) \
-struct memctrl_dev_attribute attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .value = &_name, \
- .show = _show, \
- .store = _store, \
-};
-
-#define MEMCTRL_STRING_ATTR(_name,_data,_mode,_show,_store) \
-struct memctrl_dev_attribute attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .value = _data, \
- .show = _show, \
- .store = _store, \
-};
-
-/* cwrow<id> attribute f*/
-MEMCTRL_STRING_ATTR(mc_version,EDAC_MC_VERSION,S_IRUGO,memctrl_string_show,NULL);
-
-/* csrow<id> control files */
-MEMCTRL_ATTR(panic_on_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
-MEMCTRL_ATTR(log_ue,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
-MEMCTRL_ATTR(log_ce,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
-MEMCTRL_ATTR(poll_msec,S_IRUGO|S_IWUSR,memctrl_int_show,memctrl_int_store);
-
-
-/* Base Attributes of the memory ECC object */
-static struct memctrl_dev_attribute *memctrl_attr[] = {
- &attr_panic_on_ue,
- &attr_log_ue,
- &attr_log_ce,
- &attr_poll_msec,
- &attr_mc_version,
- NULL,
-};
-
-/* Main MC kobject release() function */
-static void edac_memctrl_master_release(struct kobject *kobj)
-{
- debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__);
-}
-
-static struct kobj_type ktype_memctrl = {
- .release = edac_memctrl_master_release,
- .sysfs_ops = &memctrlfs_ops,
- .default_attrs = (struct attribute **) memctrl_attr,
-};
-
-
-/* Initialize the main sysfs entries for edac:
- * /sys/devices/system/edac
- *
- * and children
- *
- * Return: 0 SUCCESS
- * !0 FAILURE
- */
-static int edac_sysfs_memctrl_setup(void)
-{
- int err=0;
-
- debugf1("MC: " __FILE__ ": %s()\n", __func__);
-
- /* create the /sys/devices/system/edac directory */
- err = sysdev_class_register(&edac_class);
- if (!err) {
- /* Init the MC's kobject */
- memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
- kobject_init(&edac_memctrl_kobj);
-
- edac_memctrl_kobj.parent = &edac_class.kset.kobj;
- edac_memctrl_kobj.ktype = &ktype_memctrl;
-
- /* generate sysfs "..../edac/mc" */
- err = kobject_set_name(&edac_memctrl_kobj,"mc");
- if (!err) {
- /* FIXME: maybe new sysdev_create_subdir() */
- err = kobject_register(&edac_memctrl_kobj);
- if (err) {
- debugf1("Failed to register '.../edac/mc'\n");
- } else {
- debugf1("Registered '.../edac/mc' kobject\n");
- }
- }
- } else {
- debugf1(KERN_WARNING "__FILE__ %s() error=%d\n", __func__,err);
- }
-
- return err;
-}
-
-/*
- * MC teardown:
- * the '..../edac/mc' kobject followed by '..../edac' itself
- */
-static void edac_sysfs_memctrl_teardown(void)
-{
- debugf0("MC: " __FILE__ ": %s()\n", __func__);
-
- /* Unregister the MC's kobject */
- kobject_unregister(&edac_memctrl_kobj);
-
- /* release the master edac mc kobject */
- kobject_put(&edac_memctrl_kobj);
-
- /* Unregister the 'edac' object */
- sysdev_class_unregister(&edac_class);
-}
-
-/*
- * /sys/devices/system/edac/pci;
- * data structures and methods
- */
-
-struct list_control {
- struct edac_pci_device_list *list;
- int *count;
-};
-
-/* Output the list as: vendor_id:device:id<,vendor_id:device_id> */
-static ssize_t edac_pci_list_string_show(void *ptr, char *buffer)
-{
- struct list_control *listctl;
- struct edac_pci_device_list *list;
- char *p = buffer;
- int len=0;
- int i;
-
- listctl = ptr;
- list = listctl->list;
-
- for (i = 0; i < *(listctl->count); i++, list++ ) {
- if (len > 0)
- len += snprintf(p + len, (PAGE_SIZE-len), ",");
-
- len += snprintf(p + len,
- (PAGE_SIZE-len),
- "%x:%x",
- list->vendor,list->device);
- }
-
- len += snprintf(p + len,(PAGE_SIZE-len), "\n");
-
- return (ssize_t) len;
-}
-
-/**
- *
- * Scan string from **s to **e looking for one 'vendor:device' tuple
- * where each field is a hex value
- *
- * return 0 if an entry is NOT found
- * return 1 if an entry is found
- * fill in *vendor_id and *device_id with values found
- *
- * In both cases, make sure *s has been moved forward toward *e
- */
-static int parse_one_device(const char **s,const char **e,
- unsigned int *vendor_id, unsigned int *device_id)
-{
- const char *runner, *p;
-
- /* if null byte, we are done */
- if (!**s) {
- (*s)++; /* keep *s moving */
- return 0;
- }
-
- /* skip over newlines & whitespace */
- if ((**s == '\n') || isspace(**s)) {
- (*s)++;
- return 0;
- }
-
- if (!isxdigit(**s)) {
- (*s)++;
- return 0;
- }
-
- /* parse vendor_id */
- runner = *s;
- while (runner < *e) {
- /* scan for vendor:device delimiter */
- if (*runner == ':') {
- *vendor_id = simple_strtol((char*) *s, (char**) &p, 16);
- runner = p + 1;
- break;
- }
- runner++;
- }
-
- if (!isxdigit(*runner)) {
- *s = ++runner;
- return 0;
- }
-
- /* parse device_id */
- if (runner < *e) {
- *device_id = simple_strtol((char*)runner, (char**)&p, 16);
- runner = p;
- }
-
- *s = runner;
-
- return 1;
-}
-
-static ssize_t edac_pci_list_string_store(void *ptr, const char *buffer,
- size_t count)
-{
- struct list_control *listctl;
- struct edac_pci_device_list *list;
- unsigned int vendor_id, device_id;
- const char *s, *e;
- int *index;
-
- s = (char*)buffer;
- e = s + count;
-
- listctl = ptr;
- list = listctl->list;
- index = listctl->count;
-
- *index = 0;
- while (*index < MAX_LISTED_PCI_DEVICES) {
-
- if (parse_one_device(&s,&e,&vendor_id,&device_id)) {
- list[ *index ].vendor = vendor_id;
- list[ *index ].device = device_id;
- (*index)++;
- }
-
- /* check for all data consume */
- if (s >= e)
- break;
- }
-
- return count;
-}
-
-static ssize_t edac_pci_int_show(void *ptr, char *buffer)
-{
- int *value = ptr;
- return sprintf(buffer,"%d\n",*value);
-}
-
-static ssize_t edac_pci_int_store(void *ptr, const char *buffer, size_t count)
-{
- int *value = ptr;
-
- if (isdigit(*buffer))
- *value = simple_strtoul(buffer,NULL,0);
-
- return count;
-}
-
-struct edac_pci_dev_attribute {
- struct attribute attr;
- void *value;
- ssize_t (*show)(void *,char *);
- ssize_t (*store)(void *, const char *,size_t);
-};
-
-/* Set of show/store abstract level functions for PCI Parity object */
-static ssize_t edac_pci_dev_show(struct kobject *kobj, struct attribute *attr,
- char *buffer)
-{
- struct edac_pci_dev_attribute *edac_pci_dev;
- edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
-
- if (edac_pci_dev->show)
- return edac_pci_dev->show(edac_pci_dev->value, buffer);
- return -EIO;
-}
-
-static ssize_t edac_pci_dev_store(struct kobject *kobj, struct attribute *attr,
- const char *buffer, size_t count)
-{
- struct edac_pci_dev_attribute *edac_pci_dev;
- edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
-
- if (edac_pci_dev->show)
- return edac_pci_dev->store(edac_pci_dev->value, buffer, count);
- return -EIO;
-}
-
-static struct sysfs_ops edac_pci_sysfs_ops = {
- .show = edac_pci_dev_show,
- .store = edac_pci_dev_store
-};
-
-
-#define EDAC_PCI_ATTR(_name,_mode,_show,_store) \
-struct edac_pci_dev_attribute edac_pci_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .value = &_name, \
- .show = _show, \
- .store = _store, \
-};
-
-#define EDAC_PCI_STRING_ATTR(_name,_data,_mode,_show,_store) \
-struct edac_pci_dev_attribute edac_pci_attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .value = _data, \
- .show = _show, \
- .store = _store, \
-};
-
-static struct list_control pci_whitelist_control = {
- .list = pci_whitelist,
- .count = &pci_whitelist_count
-};
-
-static struct list_control pci_blacklist_control = {
- .list = pci_blacklist,
- .count = &pci_blacklist_count
-};
-
-/* whitelist attribute */
-EDAC_PCI_STRING_ATTR(pci_parity_whitelist,
- &pci_whitelist_control,
- S_IRUGO|S_IWUSR,
- edac_pci_list_string_show,
- edac_pci_list_string_store);
-
-EDAC_PCI_STRING_ATTR(pci_parity_blacklist,
- &pci_blacklist_control,
- S_IRUGO|S_IWUSR,
- edac_pci_list_string_show,
- edac_pci_list_string_store);
-
-/* PCI Parity control files */
-EDAC_PCI_ATTR(check_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store);
-EDAC_PCI_ATTR(panic_on_pci_parity,S_IRUGO|S_IWUSR,edac_pci_int_show,edac_pci_int_store);
-EDAC_PCI_ATTR(pci_parity_count,S_IRUGO,edac_pci_int_show,NULL);
-
-/* Base Attributes of the memory ECC object */
-static struct edac_pci_dev_attribute *edac_pci_attr[] = {
- &edac_pci_attr_check_pci_parity,
- &edac_pci_attr_panic_on_pci_parity,
- &edac_pci_attr_pci_parity_count,
- &edac_pci_attr_pci_parity_whitelist,
- &edac_pci_attr_pci_parity_blacklist,
- NULL,
-};
-
-/* No memory to release */
-static void edac_pci_release(struct kobject *kobj)
-{
- debugf1("EDAC PCI: " __FILE__ ": %s()\n", __func__);
-}
-
-static struct kobj_type ktype_edac_pci = {
- .release = edac_pci_release,
- .sysfs_ops = &edac_pci_sysfs_ops,
- .default_attrs = (struct attribute **) edac_pci_attr,
-};
-
-/**
- * edac_sysfs_pci_setup()
- *
- */
-static int edac_sysfs_pci_setup(void)
-{
- int err;
-
- debugf1("MC: " __FILE__ ": %s()\n", __func__);
-
- memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj));
-
- kobject_init(&edac_pci_kobj);
- edac_pci_kobj.parent = &edac_class.kset.kobj;
- edac_pci_kobj.ktype = &ktype_edac_pci;
-
- err = kobject_set_name(&edac_pci_kobj, "pci");
- if (!err) {
- /* Instanstiate the csrow object */
- /* FIXME: maybe new sysdev_create_subdir() */
- err = kobject_register(&edac_pci_kobj);
- if (err)
- debugf1("Failed to register '.../edac/pci'\n");
- else
- debugf1("Registered '.../edac/pci' kobject\n");
- }
- return err;
-}
-
-
-static void edac_sysfs_pci_teardown(void)
-{
- debugf0("MC: " __FILE__ ": %s()\n", __func__);
-
- kobject_unregister(&edac_pci_kobj);
- kobject_put(&edac_pci_kobj);
-}
-
-/* EDAC sysfs CSROW data structures and methods */
-
-/* Set of more detailed csrow<id> attribute show/store functions */
-static ssize_t csrow_ch0_dimm_label_show(struct csrow_info *csrow, char *data)
-{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 0) {
- size = snprintf(data, EDAC_MC_LABEL_LEN,"%s\n",
- csrow->channels[0].label);
- }
- return size;
-}
-
-static ssize_t csrow_ch1_dimm_label_show(struct csrow_info *csrow, char *data)
-{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 0) {
- size = snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
- csrow->channels[1].label);
- }
- return size;
-}
-
-static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow,
- const char *data, size_t size)
-{
- ssize_t max_size = 0;
-
- if (csrow->nr_channels > 0) {
- max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1);
- strncpy(csrow->channels[0].label, data, max_size);
- csrow->channels[0].label[max_size] = '\0';
- }
- return size;
-}
-
-static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow,
- const char *data, size_t size)
-{
- ssize_t max_size = 0;
-
- if (csrow->nr_channels > 1) {
- max_size = min((ssize_t)size,(ssize_t)EDAC_MC_LABEL_LEN-1);
- strncpy(csrow->channels[1].label, data, max_size);
- csrow->channels[1].label[max_size] = '\0';
- }
- return max_size;
-}
-
-static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%u\n", csrow->ue_count);
-}
-
-static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%u\n", csrow->ce_count);
-}
-
-static ssize_t csrow_ch0_ce_count_show(struct csrow_info *csrow, char *data)
-{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 0) {
- size = sprintf(data,"%u\n", csrow->channels[0].ce_count);
- }
- return size;
-}
-
-static ssize_t csrow_ch1_ce_count_show(struct csrow_info *csrow, char *data)
-{
- ssize_t size = 0;
-
- if (csrow->nr_channels > 1) {
- size = sprintf(data,"%u\n", csrow->channels[1].ce_count);
- }
- return size;
-}
-
-static ssize_t csrow_size_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
-}
-
-static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%s\n", mem_types[csrow->mtype]);
-}
-
-static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%s\n", dev_types[csrow->dtype]);
-}
-
-static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data)
-{
- return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
-}
-
-struct csrowdev_attribute {
- struct attribute attr;
- ssize_t (*show)(struct csrow_info *,char *);
- ssize_t (*store)(struct csrow_info *, const char *,size_t);
-};
-
-#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 csrow objects */
-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);
- 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);
- return -EIO;
-}
-
-static struct sysfs_ops csrowfs_ops = {
- .show = csrowdev_show,
- .store = csrowdev_store
-};
-
-#define CSROWDEV_ATTR(_name,_mode,_show,_store) \
-struct csrowdev_attribute attr_##_name = { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .show = _show, \
- .store = _store, \
-};
-
-/* cwrow<id>/attribute files */
-CSROWDEV_ATTR(size_mb,S_IRUGO,csrow_size_show,NULL);
-CSROWDEV_ATTR(dev_type,S_IRUGO,csrow_dev_type_show,NULL);
-CSROWDEV_ATTR(mem_type,S_IRUGO,csrow_mem_type_show,NULL);
-CSROWDEV_ATTR(edac_mode,S_IRUGO,csrow_edac_mode_show,NULL);
-CSROWDEV_ATTR(ue_count,S_IRUGO,csrow_ue_count_show,NULL);
-CSROWDEV_ATTR(ce_count,S_IRUGO,csrow_ce_count_show,NULL);
-CSROWDEV_ATTR(ch0_ce_count,S_IRUGO,csrow_ch0_ce_count_show,NULL);
-CSROWDEV_ATTR(ch1_ce_count,S_IRUGO,csrow_ch1_ce_count_show,NULL);
-
-/* control/attribute files */
-CSROWDEV_ATTR(ch0_dimm_label,S_IRUGO|S_IWUSR,
- csrow_ch0_dimm_label_show,
- csrow_ch0_dimm_label_store);
-CSROWDEV_ATTR(ch1_dimm_label,S_IRUGO|S_IWUSR,
- csrow_ch1_dimm_label_show,
- csrow_ch1_dimm_label_store);
-
-
-/* Attributes of the CSROW<id> object */
-static struct csrowdev_attribute *csrow_attr[] = {
- &attr_dev_type,
- &attr_mem_type,
- &attr_edac_mode,
- &attr_size_mb,
- &attr_ue_count,
- &attr_ce_count,
- &attr_ch0_ce_count,
- &attr_ch1_ce_count,
- &attr_ch0_dimm_label,
- &attr_ch1_dimm_label,
- NULL,
-};
-
-
-/* No memory to release */
-static void edac_csrow_instance_release(struct kobject *kobj)
-{
- debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__);
-}
-
-static struct kobj_type ktype_csrow = {
- .release = edac_csrow_instance_release,
- .sysfs_ops = &csrowfs_ops,
- .default_attrs = (struct attribute **) 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;
-
- debugf0("MC: " __FILE__ ": %s()\n", __func__);
-
- memset(&csrow->kobj, 0, sizeof(csrow->kobj));
-
- /* generate ..../edac/mc/mc<id>/csrow<index> */
-
- kobject_init(&csrow->kobj);
- 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) {
- /* Instanstiate the csrow object */
- err = kobject_register(&csrow->kobj);
- if (err)
- debugf0("Failed to register CSROW%d\n",index);
- else
- debugf0("Registered CSROW%d\n",index);
- }
-
- return err;
-}
-
-/* sysfs data structures and methods for the MCI kobjects */
-
-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;
-}
-
-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_mod_name_show(struct mem_ctl_info *mci, char *data)
-{
- return sprintf(data,"%s %s\n", mci->mod_name, mci->mod_ver);
-}
-
-static ssize_t mci_ctl_name_show(struct mem_ctl_info *mci, char *data)
-{
- return sprintf(data,"%s\n", mci->ctl_name);
-}
-
-static int mci_output_edac_cap(char *buf, unsigned long edac_cap)
-{
- char *p = buf;
- int bit_idx;
-
- for (bit_idx = 0; bit_idx < 8 * sizeof(edac_cap); bit_idx++) {
- if ((edac_cap >> bit_idx) & 0x1)
- p += sprintf(p, "%s ", edac_caps[bit_idx]);
- }
-
- return p - buf;
-}
-
-static ssize_t mci_edac_capability_show(struct mem_ctl_info *mci, char *data)
-{
- char *p = data;
-
- p += mci_output_edac_cap(p,mci->edac_ctl_cap);
- p += sprintf(p, "\n");
-
- return p - data;
-}
-
-static ssize_t mci_edac_current_capability_show(struct mem_ctl_info *mci,
- char *data)
-{
- char *p = data;
-
- p += mci_output_edac_cap(p,mci->edac_cap);
- p += sprintf(p, "\n");
-
- return p - data;
-}
-
-static int mci_output_mtype_cap(char *buf, unsigned long mtype_cap)
-{
- char *p = buf;
- int bit_idx;
-
- for (bit_idx = 0; bit_idx < 8 * sizeof(mtype_cap); bit_idx++) {
- if ((mtype_cap >> bit_idx) & 0x1)
- p += sprintf(p, "%s ", mem_types[bit_idx]);
- }
-
- return p - buf;
-}
-
-static ssize_t mci_supported_mem_type_show(struct mem_ctl_info *mci, char *data)
-{
- char *p = data;
-
- p += mci_output_mtype_cap(p,mci->mtype_cap);
- p += sprintf(p, "\n");
-
- return p - data;
-}
-
-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)
-
-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, \
-};
-
-/* Control file */
-MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
-
-/* Attribute files */
-MCIDEV_ATTR(mc_name,S_IRUGO,mci_ctl_name_show,NULL);
-MCIDEV_ATTR(module_name,S_IRUGO,mci_mod_name_show,NULL);
-MCIDEV_ATTR(edac_capability,S_IRUGO,mci_edac_capability_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);
-MCIDEV_ATTR(edac_current_capability,S_IRUGO,
- mci_edac_current_capability_show,NULL);
-MCIDEV_ATTR(supported_mem_type,S_IRUGO,
- mci_supported_mem_type_show,NULL);
-
-
-static struct mcidev_attribute *mci_attr[] = {
- &mci_attr_reset_counters,
- &mci_attr_module_name,
- &mci_attr_mc_name,
- &mci_attr_edac_capability,
- &mci_attr_edac_current_capability,
- &mci_attr_supported_mem_type,
- &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 = container_of(kobj,struct mem_ctl_info,edac_mci_kobj);
-
- debugf0("MC: " __FILE__ ": %s() idx=%d calling kfree\n",
- __func__, mci->mc_idx);
-
- kfree(mci);
-}
-
-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("MC: " __FILE__ ": %s() idx=%d\n", __func__, mci->mc_idx);
-
- memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj));
- kobject_init(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->pdev->dev.kobj,
- EDAC_DEVICE_SYMLINK);
- if (err) {
- kobject_unregister(edac_mci_kobj);
- return err;
- }
-
- /* 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 fail;
- }
- }
-
- /* Mark this MCI instance as having sysfs entries */
- mci->sysfs_active = MCI_SYSFS_ACTIVE;
-
- return 0;
-
-
- /* CSROW error: backout what has already been registered, */
-fail:
- for ( i--; i >= 0; i--) {
- if (csrow->nr_pages > 0) {
- kobject_unregister(&mci->csrows[i].kobj);
- kobject_put(&mci->csrows[i].kobj);
- }
- }
-
- kobject_unregister(edac_mci_kobj);
- kobject_put(edac_mci_kobj);
-
- return err;
-}
-
-/*
- * remove a Memory Controller instance
- */
-static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
-{
- int i;
-
- debugf0("MC: " __FILE__ ": %s()\n", __func__);
-
- /* remove all csrow kobjects */
- for (i = 0; i < mci->nr_csrows; i++) {
- if (mci->csrows[i].nr_pages > 0) {
- kobject_unregister(&mci->csrows[i].kobj);
- kobject_put(&mci->csrows[i].kobj);
- }
- }
-
- sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
-
- kobject_unregister(&mci->edac_mci_kobj);
- kobject_put(&mci->edac_mci_kobj);
-}
-
-/* END OF sysfs data and methods */
+/* lock to memory controller's control array */
+static DEFINE_MUTEX(mem_ctls_mutex);
+static LIST_HEAD(mc_devices);
#ifdef CONFIG_EDAC_DEBUG
-EXPORT_SYMBOL(edac_mc_dump_channel);
-
-void edac_mc_dump_channel(struct channel_info *chan)
+static 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->csrow = %p\n\n", chan->csrow);
}
-
-EXPORT_SYMBOL(edac_mc_dump_csrow);
-
-void edac_mc_dump_csrow(struct csrow_info *csrow)
+static 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->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->nr_channels = %d\n", csrow->nr_channels);
debugf4("\tcsrow->channels = %p\n", csrow->channels);
debugf4("\tcsrow->mci = %p\n\n", csrow->mci);
}
-
-EXPORT_SYMBOL(edac_mc_dump_mci);
-
-void edac_mc_dump_mci(struct mem_ctl_info *mci)
+static void edac_mc_dump_mci(struct mem_ctl_info *mci)
{
debugf3("\tmci = %p\n", mci);
debugf3("\tmci->mtype_cap = %lx\n", mci->mtype_cap);
debugf4("\tmci->edac_check = %p\n", mci->edac_check);
debugf3("\tmci->nr_csrows = %d, csrows = %p\n",
mci->nr_csrows, mci->csrows);
- debugf3("\tpdev = %p\n", mci->pdev);
- debugf3("\tmod_name:ctl_name = %s:%s\n",
- mci->mod_name, mci->ctl_name);
+ 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);
}
+/*
+ * keep those in sync with the enum mem_type
+ */
+const char *edac_mem_types[] = {
+ "Empty csrow",
+ "Reserved csrow type",
+ "Unknown csrow type",
+ "Fast page mode RAM",
+ "Extended data out RAM",
+ "Burst Extended data out RAM",
+ "Single data rate SDRAM",
+ "Registered single data rate SDRAM",
+ "Double data rate SDRAM",
+ "Registered Double data rate SDRAM",
+ "Rambus DRAM",
+ "Unbuffered DDR2 RAM",
+ "Fully buffered DDR2",
+ "Registered DDR2 RAM",
+ "Rambus XDR",
+ "Unbuffered DDR3 RAM",
+ "Registered DDR3 RAM",
+};
+EXPORT_SYMBOL_GPL(edac_mem_types);
#endif /* CONFIG_EDAC_DEBUG */
* 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)
+void *edac_align_ptr(void *ptr, unsigned size)
{
unsigned align, r;
else if (size > sizeof(char))
align = sizeof(short);
else
- return (char *) ptr;
+ return (char *)ptr;
r = size % align;
if (r == 0)
- return (char *) ptr;
+ return (char *)ptr;
- return (char *) (((unsigned long) ptr) + align - r);
+ return (void *)(((unsigned long)ptr) + align - r);
}
-
-EXPORT_SYMBOL(edac_mc_alloc);
-
/**
* edac_mc_alloc: Allocate a struct mem_ctl_info structure
* @size_pvt: size of private storage needed
* struct mem_ctl_info pointer
*/
struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
- unsigned nr_chans)
+ unsigned nr_chans, int edac_index)
{
struct mem_ctl_info *mci;
struct csrow_info *csi, *csrow;
void *pvt;
unsigned size;
int row, chn;
+ int err;
/* 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)
+ mci = (struct mem_ctl_info *)0;
+ csi = edac_align_ptr(&mci[1], sizeof(*csi));
+ chi = edac_align_ptr(&csi[nr_csrows], sizeof(*chi));
+ pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt);
+ size = ((unsigned long)pvt) + sz_pvt;
+
+ mci = kzalloc(size, GFP_KERNEL);
+ if (mci == 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 */
+ 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;
+ /* setup index and various internal pointers */
+ mci->mc_idx = edac_index;
mci->csrows = csi;
mci->pvt_info = pvt;
mci->nr_csrows = nr_csrows;
}
}
- return mci;
-}
+ mci->op_state = OP_ALLOC;
+ /*
+ * Initialize the 'root' kobj for the edac_mc controller
+ */
+ err = edac_mc_register_sysfs_main_kobj(mci);
+ if (err) {
+ kfree(mci);
+ return NULL;
+ }
-EXPORT_SYMBOL(edac_mc_free);
+ /* at this point, the root kobj is valid, and in order to
+ * 'free' the object, then the function:
+ * edac_mc_unregister_sysfs_main_kobj() must be called
+ * which will perform kobj unregistration and the actual free
+ * will occur during the kobject callback operation
+ */
+ return mci;
+}
+EXPORT_SYMBOL_GPL(edac_mc_alloc);
/**
- * edac_mc_free: Free a previously allocated 'mci' structure
+ * 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)
+{
+ edac_mc_unregister_sysfs_main_kobj(mci);
+}
+EXPORT_SYMBOL_GPL(edac_mc_free);
+
+
+/*
+ * find_mci_by_dev
+ *
+ * scan list of controllers looking for the one that manages
+ * the 'dev' device
+ */
+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;
+}
+
+/*
+ * handler for EDAC to check if NMI type handler has asserted interrupt
+ */
+static int edac_mc_assert_error_check_and_clear(void)
+{
+ int old_state;
+
+ if (edac_op_state == EDAC_OPSTATE_POLL)
+ return 1;
+
+ old_state = edac_err_assert;
+ edac_err_assert = 0;
+
+ return old_state;
+}
+
+/*
+ * edac_mc_workq_function
+ * performs the operation scheduled by a workq request
+ */
+static void edac_mc_workq_function(struct work_struct *work_req)
+{
+ struct delayed_work *d_work = to_delayed_work(work_req);
+ struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work);
+
+ mutex_lock(&mem_ctls_mutex);
+
+ /* if this control struct has movd to offline state, we are done */
+ if (mci->op_state == OP_OFFLINE) {
+ mutex_unlock(&mem_ctls_mutex);
+ return;
+ }
+
+ /* Only poll controllers that are running polled and have a check */
+ if (edac_mc_assert_error_check_and_clear() && (mci->edac_check != NULL))
+ mci->edac_check(mci);
+
+ mutex_unlock(&mem_ctls_mutex);
+
+ /* Reschedule */
+ queue_delayed_work(edac_workqueue, &mci->work,
+ msecs_to_jiffies(edac_mc_get_poll_msec()));
+}
+
+/*
+ * edac_mc_workq_setup
+ * initialize a workq item for this mci
+ * passing in the new delay period in msec
*
- * Free up a previously allocated mci structure
- * A MCI structure can be in 2 states after being allocated
- * by edac_mc_alloc().
- * 1) Allocated in a MC driver's probe, but not yet committed
- * 2) Allocated and committed, by a call to edac_mc_add_mc()
- * edac_mc_add_mc() is the function that adds the sysfs entries
- * thus, this free function must determine which state the 'mci'
- * structure is in, then either free it directly or
- * perform kobject cleanup by calling edac_remove_sysfs_mci_device().
+ * locking model:
*
- * VOID Return
+ * called with the mem_ctls_mutex held
*/
-void edac_mc_free(struct mem_ctl_info *mci)
+static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec)
{
- /* only if sysfs entries for this mci instance exist
- * do we remove them and defer the actual kfree via
- * the kobject 'release()' callback.
- *
- * Otherwise, do a straight kfree now.
- */
- if (mci->sysfs_active == MCI_SYSFS_ACTIVE)
- edac_remove_sysfs_mci_device(mci);
- else
- kfree(mci);
+ debugf0("%s()\n", __func__);
+
+ /* if this instance is not in the POLL state, then simply return */
+ if (mci->op_state != OP_RUNNING_POLL)
+ return;
+
+ INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
+ queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
}
+/*
+ * edac_mc_workq_teardown
+ * stop the workq processing on this mci
+ *
+ * locking model:
+ *
+ * called WITHOUT lock held
+ */
+static void edac_mc_workq_teardown(struct mem_ctl_info *mci)
+{
+ int status;
+ status = cancel_delayed_work(&mci->work);
+ if (status == 0) {
+ debugf0("%s() not canceled, flush the queue\n",
+ __func__);
-EXPORT_SYMBOL(edac_mc_find_mci_by_pdev);
+ /* workq instance might be running, wait for it */
+ flush_workqueue(edac_workqueue);
+ }
+}
-struct mem_ctl_info *edac_mc_find_mci_by_pdev(struct pci_dev *pdev)
+/*
+ * edac_mc_reset_delay_period(unsigned long value)
+ *
+ * user space has updated our poll period value, need to
+ * reset our workq delays
+ */
+void edac_mc_reset_delay_period(int value)
{
struct mem_ctl_info *mci;
struct list_head *item;
- debugf3("MC: " __FILE__ ": %s()\n", __func__);
+ mutex_lock(&mem_ctls_mutex);
+ /* scan the list and turn off all workq timers, doing so under lock
+ */
list_for_each(item, &mc_devices) {
mci = list_entry(item, struct mem_ctl_info, link);
- if (mci->pdev == pdev)
- return mci;
+ if (mci->op_state == OP_RUNNING_POLL)
+ cancel_delayed_work(&mci->work);
}
- return NULL;
+ mutex_unlock(&mem_ctls_mutex);
+
+
+ /* re-walk the list, and reset the poll delay */
+ mutex_lock(&mem_ctls_mutex);
+
+ list_for_each(item, &mc_devices) {
+ mci = list_entry(item, struct mem_ctl_info, link);
+
+ edac_mc_workq_setup(mci, (unsigned long) value);
+ }
+
+ mutex_unlock(&mem_ctls_mutex);
+}
+
+
+
+/* Return 0 on success, 1 on failure.
+ * Before calling this function, caller must
+ * assign a unique value to mci->mc_idx.
+ *
+ * locking model:
+ *
+ * called with the mem_ctls_mutex lock held
+ */
+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;
+
+ p = find_mci_by_dev(mci->dev);
+ if (unlikely(p != 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);
+ atomic_inc(&edac_handlers);
+ return 0;
+
+fail0:
+ edac_printk(KERN_WARNING, EDAC_MC,
+ "%s (%s) %s %s already assigned %d\n", dev_name(p->dev),
+ edac_dev_name(mci), 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 int add_mc_to_global_list (struct mem_ctl_info *mci)
+static void complete_mc_list_del(struct rcu_head *head)
{
- struct list_head *item, *insert_before;
- struct mem_ctl_info *p;
- int i;
-
- if (list_empty(&mc_devices)) {
- mci->mc_idx = 0;
- insert_before = &mc_devices;
- } else {
- if (edac_mc_find_mci_by_pdev(mci->pdev)) {
- printk(KERN_WARNING
- "EDAC MC: %s (%s) %s %s already assigned %d\n",
- mci->pdev->dev.bus_id, pci_name(mci->pdev),
- mci->mod_name, mci->ctl_name, mci->mc_idx);
- return 1;
- }
+ struct mem_ctl_info *mci;
- insert_before = NULL;
- i = 0;
+ mci = container_of(head, struct mem_ctl_info, rcu);
+ INIT_LIST_HEAD(&mci->link);
+}
- list_for_each(item, &mc_devices) {
- p = list_entry(item, struct mem_ctl_info, link);
+static void del_mc_from_global_list(struct mem_ctl_info *mci)
+{
+ atomic_dec(&edac_handlers);
+ list_del_rcu(&mci->link);
+ call_rcu(&mci->rcu, complete_mc_list_del);
+ rcu_barrier();
+}
- if (p->mc_idx != i) {
- insert_before = item;
- break;
- }
+/**
+ * edac_mc_find: Search for a mem_ctl_info structure whose index is 'idx'.
+ *
+ * If found, return a pointer to the structure.
+ * Else return NULL.
+ *
+ * Caller must hold mem_ctls_mutex.
+ */
+struct mem_ctl_info *edac_mc_find(int idx)
+{
+ struct list_head *item;
+ struct mem_ctl_info *mci;
- i++;
- }
+ list_for_each(item, &mc_devices) {
+ mci = list_entry(item, struct mem_ctl_info, link);
- mci->mc_idx = i;
+ if (mci->mc_idx >= idx) {
+ if (mci->mc_idx == idx)
+ return mci;
- if (insert_before == NULL)
- insert_before = &mc_devices;
+ break;
+ }
}
- list_add_tail_rcu(&mci->link, insert_before);
- return 0;
+ return NULL;
}
-
-
-
-EXPORT_SYMBOL(edac_mc_add_mc);
+EXPORT_SYMBOL(edac_mc_find);
/**
- * edac_mc_add_mc: Insert the 'mci' structure into the mci global list
+ * 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
/* FIXME - should a warning be printed if no error detection? correction? */
int edac_mc_add_mc(struct mem_ctl_info *mci)
{
- int rc = 1;
+ debugf0("%s()\n", __func__);
- debugf0("MC: " __FILE__ ": %s()\n", __func__);
#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]);
+ channels[j]);
}
}
#endif
- down(&mem_ctls_mutex);
+ mutex_lock(&mem_ctls_mutex);
if (add_mc_to_global_list(mci))
- goto finish;
+ goto fail0;
/* set load time so that error rate can be tracked */
mci->start_time = jiffies;
- if (edac_create_sysfs_mci_device(mci)) {
- printk(KERN_WARNING
- "EDAC MC%d: failed to create sysfs device\n",
- mci->mc_idx);
- /* FIXME - should there be an error code and unwind? */
- goto finish;
- }
+ if (edac_create_sysfs_mci_device(mci)) {
+ edac_mc_printk(mci, KERN_WARNING,
+ "failed to create sysfs device\n");
+ goto fail1;
+ }
- /* Report action taken */
- printk(KERN_INFO
- "EDAC MC%d: Giving out device to %s %s: PCI %s\n",
- mci->mc_idx, mci->mod_name, mci->ctl_name,
- pci_name(mci->pdev));
+ /* If there IS a check routine, then we are running POLLED */
+ if (mci->edac_check != NULL) {
+ /* This instance is NOW RUNNING */
+ mci->op_state = OP_RUNNING_POLL;
+ edac_mc_workq_setup(mci, edac_mc_get_poll_msec());
+ } else {
+ mci->op_state = OP_RUNNING_INTERRUPT;
+ }
- rc = 0;
+ /* Report action taken */
+ edac_mc_printk(mci, KERN_INFO, "Giving out device to '%s' '%s':"
+ " DEV %s\n", mci->mod_name, mci->ctl_name, edac_dev_name(mci));
-finish:
- up(&mem_ctls_mutex);
- return rc;
-}
+ mutex_unlock(&mem_ctls_mutex);
+ return 0;
+fail1:
+ del_mc_from_global_list(mci);
+fail0:
+ mutex_unlock(&mem_ctls_mutex);
+ return 1;
+}
+EXPORT_SYMBOL_GPL(edac_mc_add_mc);
-static void complete_mc_list_del (struct rcu_head *head)
+/**
+ * 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;
- mci = container_of(head, struct mem_ctl_info, rcu);
- INIT_LIST_HEAD(&mci->link);
- complete(&mci->complete);
-}
+ debugf0("%s()\n", __func__);
-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);
-}
+ mutex_lock(&mem_ctls_mutex);
-EXPORT_SYMBOL(edac_mc_del_mc);
+ /* find the requested mci struct in the global list */
+ mci = find_mci_by_dev(dev);
+ if (mci == NULL) {
+ mutex_unlock(&mem_ctls_mutex);
+ return NULL;
+ }
-/**
- * edac_mc_del_mc: Remove the specified mci structure from global list
- * @mci: Pointer to struct mem_ctl_info structure
- *
- * Returns:
- * 0 Success
- * 1 Failure
- */
-int edac_mc_del_mc(struct mem_ctl_info *mci)
-{
- int rc = 1;
+ /* marking MCI offline */
+ mci->op_state = OP_OFFLINE;
- debugf0("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__);
- down(&mem_ctls_mutex);
del_mc_from_global_list(mci);
- printk(KERN_INFO
- "EDAC MC%d: Removed device %d for %s %s: PCI %s\n",
- mci->mc_idx, mci->mc_idx, mci->mod_name, mci->ctl_name,
- pci_name(mci->pdev));
- rc = 0;
- up(&mem_ctls_mutex);
-
- return rc;
-}
+ mutex_unlock(&mem_ctls_mutex);
+
+ /* flush workq processes and remove sysfs */
+ edac_mc_workq_teardown(mci);
+ edac_remove_sysfs_mci_device(mci);
+ edac_printk(KERN_INFO, EDAC_MC,
+ "Removed device %d for %s %s: DEV %s\n", mci->mc_idx,
+ mci->mod_name, mci->ctl_name, edac_dev_name(mci));
-EXPORT_SYMBOL(edac_mc_scrub_block);
+ return mci;
+}
+EXPORT_SYMBOL_GPL(edac_mc_del_mc);
-void edac_mc_scrub_block(unsigned long page, unsigned long offset,
- u32 size)
+static void edac_mc_scrub_block(unsigned long page, unsigned long offset,
+ u32 size)
{
struct page *pg;
void *virt_addr;
unsigned long flags = 0;
- debugf3("MC: " __FILE__ ": %s()\n", __func__);
+ debugf3("%s()\n", __func__);
/* ECC error page was not in our memory. Ignore it. */
- if(!pfn_valid(page))
+ if (!pfn_valid(page))
return;
/* Find the actual page structure then map it and fix */
local_irq_restore(flags);
}
-
/* FIXME - should return -1 */
-EXPORT_SYMBOL(edac_mc_find_csrow_by_page);
-
-int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
- unsigned long page)
+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: " __FILE__ ": %s(): 0x%lx\n", mci->mc_idx, __func__,
- page);
+ debugf1("MC%d: %s(): 0x%lx\n", mci->mc_idx, __func__, page);
row = -1;
for (i = 0; i < mci->nr_csrows; i++) {
if (csrow->nr_pages == 0)
continue;
- debugf3("MC%d: " __FILE__
- ": %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);
+ 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) &&
}
if (row == -1)
- printk(KERN_ERR
- "EDAC MC%d: could not look up page error address %lx\n",
- mci->mc_idx, (unsigned long) page);
+ edac_mc_printk(mci, KERN_ERR,
+ "could not look up page error address %lx\n",
+ (unsigned long)page);
return row;
}
-
-
-EXPORT_SYMBOL(edac_mc_handle_ce);
+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 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: " __FILE__ ": %s()\n", mci->mc_idx, __func__);
+ 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 */
- printk(KERN_ERR
- "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n",
- mci->mc_idx, row, mci->nr_csrows);
+ 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 */
- printk(KERN_ERR
- "EDAC MC%d: INTERNAL ERROR: channel out of range "
- "(%d >= %d)\n",
- mci->mc_idx, channel, mci->csrows[row].nr_channels);
+ 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)
+ if (edac_mc_get_log_ce())
/* FIXME - put in DIMM location */
- printk(KERN_WARNING
- "EDAC MC%d: CE page 0x%lx, offset 0x%lx,"
- " grain %d, syndrome 0x%lx, row %d, channel %d,"
- " label \"%s\": %s\n", mci->mc_idx,
- page_frame_number, offset_in_page,
- mci->csrows[row].grain, syndrome, row, channel,
- mci->csrows[row].channels[channel].label, msg);
+ 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++;
* 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;
+ 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);
+ mci->csrows[row].grain);
}
}
+EXPORT_SYMBOL_GPL(edac_mc_handle_ce);
-
-EXPORT_SYMBOL(edac_mc_handle_ce_no_info);
-
-void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci,
- const char *msg)
+void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg)
{
- if (log_ce)
- printk(KERN_WARNING
- "EDAC MC%d: CE - no information available: %s\n",
- mci->mc_idx, msg);
+ if (edac_mc_get_log_ce())
+ edac_mc_printk(mci, KERN_WARNING,
+ "CE - no information available: %s\n", msg);
+
mci->ce_noinfo_count++;
mci->ce_count++;
}
-
-
-EXPORT_SYMBOL(edac_mc_handle_ue);
+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)
+ 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];
int chan;
int chars;
- debugf3("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __func__);
+ 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 */
- printk(KERN_ERR
- "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n",
- mci->mc_idx, row, mci->nr_csrows);
+ 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;
}
mci->csrows[row].channels[0].label);
len -= chars;
pos += chars;
+
for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0);
- chan++) {
+ chan++) {
chars = snprintf(pos, len + 1, ":%s",
mci->csrows[row].channels[chan].label);
len -= chars;
pos += chars;
}
- if (log_ue)
- printk(KERN_EMERG
- "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);
+ if (edac_mc_get_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);
+ if (edac_mc_get_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);
-
-EXPORT_SYMBOL(edac_mc_handle_ue_no_info);
-
-void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci,
- const char *msg)
+void edac_mc_handle_ue_no_info(struct mem_ctl_info *mci, const char *msg)
{
- if (panic_on_ue)
+ if (edac_mc_get_panic_on_ue())
panic("EDAC MC%d: Uncorrected Error", mci->mc_idx);
- if (log_ue)
- printk(KERN_WARNING
- "EDAC MC%d: UE - no information available: %s\n",
- mci->mc_idx, msg);
+ if (edac_mc_get_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);
-
-#ifdef CONFIG_PCI
-
-static u16 get_pci_parity_status(struct pci_dev *dev, int secondary)
-{
- int where;
- u16 status;
-
- where = secondary ? PCI_SEC_STATUS : PCI_STATUS;
- pci_read_config_word(dev, where, &status);
-
- /* If we get back 0xFFFF then we must suspect that the card has been pulled but
- the Linux PCI layer has not yet finished cleaning up. We don't want to report
- on such devices */
-
- if (status == 0xFFFF) {
- u32 sanity;
- pci_read_config_dword(dev, 0, &sanity);
- if (sanity == 0xFFFFFFFF)
- return 0;
- }
- status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR |
- PCI_STATUS_PARITY;
-
- if (status)
- /* reset only the bits we are interested in */
- pci_write_config_word(dev, where, status);
-
- return status;
-}
-
-typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev);
-
-/* Clear any PCI parity errors logged by this device. */
-static void edac_pci_dev_parity_clear( struct pci_dev *dev )
-{
- u8 header_type;
-
- get_pci_parity_status(dev, 0);
-
- /* read the device TYPE, looking for bridges */
- pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
-
- if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE)
- get_pci_parity_status(dev, 1);
-}
-
-/*
- * PCI Parity polling
- *
- */
-static void edac_pci_dev_parity_test(struct pci_dev *dev)
-{
- u16 status;
- u8 header_type;
-
- /* read the STATUS register on this device
- */
- status = get_pci_parity_status(dev, 0);
-
- debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id );
-
- /* check the status reg for errors */
- if (status) {
- if (status & (PCI_STATUS_SIG_SYSTEM_ERROR))
- printk(KERN_CRIT
- "EDAC PCI- "
- "Signaled System Error on %s\n",
- pci_name (dev));
-
- if (status & (PCI_STATUS_PARITY)) {
- 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)) {
- 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))
- printk(KERN_CRIT
- "EDAC PCI-Bridge- "
- "Signaled System Error on %s\n",
- pci_name (dev));
-
- if (status & (PCI_STATUS_PARITY)) {
- 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)) {
- printk(KERN_CRIT
- "EDAC PCI-Bridge- "
- "Detected Parity Error on %s\n",
- pci_name (dev));
-
- atomic_inc(&pci_parity_count);
- }
- }
- }
-}
-
-/*
- * check_dev_on_list: Scan for a PCI device on a white/black list
- * @list: an EDAC &edac_pci_device_list white/black list pointer
- * @free_index: index of next free entry on the list
- * @pci_dev: PCI Device pointer
- *
- * see if list contains the device.
- *
- * Returns: 0 not found
- * 1 found on list
- */
-static int check_dev_on_list(struct edac_pci_device_list *list, int free_index,
- struct pci_dev *dev)
-{
- int i;
- int rc = 0; /* Assume not found */
- unsigned short vendor=dev->vendor;
- unsigned short device=dev->device;
-
- /* Scan the list, looking for a vendor/device match
- */
- for (i = 0; i < free_index; i++, list++ ) {
- if ( (list->vendor == vendor ) &&
- (list->device == device )) {
- rc = 1;
- break;
- }
- }
-
- return rc;
-}
-
-/*
- * 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
+/*************************************************************
+ * On Fully Buffered DIMM modules, this help function is
+ * called to process UE events
*/
-static inline void edac_pci_dev_parity_iterator(pci_parity_check_fn_t fn)
+void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci,
+ unsigned int csrow,
+ unsigned int channela,
+ unsigned int channelb, char *msg)
{
- struct pci_dev *dev=NULL;
+ int len = EDAC_MC_LABEL_LEN * 4;
+ char labels[len + 1];
+ char *pos = labels;
+ int chars;
- /* 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) {
-
- /* if whitelist exists then it has priority, so only scan those
- * devices on the whitelist
- */
- if (pci_whitelist_count > 0 ) {
- if (check_dev_on_list(pci_whitelist,
- pci_whitelist_count, dev))
- fn(dev);
- } else {
- /*
- * if no whitelist, then check if this devices is
- * blacklisted
- */
- if (!check_dev_on_list(pci_blacklist,
- pci_blacklist_count, dev))
- fn(dev);
- }
+ if (csrow >= mci->nr_csrows) {
+ /* something is wrong */
+ edac_mc_printk(mci, KERN_ERR,
+ "INTERNAL ERROR: row out of range (%d >= %d)\n",
+ csrow, mci->nr_csrows);
+ edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
+ return;
}
-}
-static void do_pci_parity_check(void)
-{
- unsigned long flags;
- int before_count;
-
- debugf3("MC: " __FILE__ ": %s()\n", __func__);
-
- if (!check_pci_parity)
+ if (channela >= mci->csrows[csrow].nr_channels) {
+ /* something is wrong */
+ edac_mc_printk(mci, KERN_ERR,
+ "INTERNAL ERROR: channel-a out of range "
+ "(%d >= %d)\n",
+ channela, mci->csrows[csrow].nr_channels);
+ edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
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 */
-
-static inline void do_pci_parity_check(void)
-{
- /* no-op */
-}
-
-
-static inline void clear_pci_parity_errors(void)
-{
- /* no-op */
-}
-
-
-#endif /* CONFIG_PCI */
-
-/*
- * Iterate over all MC instances and check for ECC, et al, errors
- */
-static inline void check_mc_devices (void)
-{
- unsigned long flags;
- struct list_head *item;
- struct mem_ctl_info *mci;
-
- debugf3("MC: " __FILE__ ": %s()\n", __func__);
-
- /* during poll, have interrupts off */
- local_irq_save(flags);
-
- list_for_each(item, &mc_devices) {
- mci = list_entry(item, struct mem_ctl_info, link);
-
- if (mci->edac_check != NULL)
- mci->edac_check(mci);
+ if (channelb >= mci->csrows[csrow].nr_channels) {
+ /* something is wrong */
+ edac_mc_printk(mci, KERN_ERR,
+ "INTERNAL ERROR: channel-b out of range "
+ "(%d >= %d)\n",
+ channelb, mci->csrows[csrow].nr_channels);
+ edac_mc_handle_ue_no_info(mci, "INTERNAL ERROR");
+ return;
}
- local_irq_restore(flags);
-}
-
-
-/*
- * 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("MC: " __FILE__ ": %s()\n", __func__);
-
- check_mc_devices();
-
- do_pci_parity_check();
-}
-
-
-/*
- * EDAC thread state information
- */
-struct bs_thread_info
-{
- struct task_struct *task;
- struct completion *event;
- char *name;
- void (*run)(void);
-};
-
-static struct bs_thread_info bs_thread;
-
-/*
- * edac_kernel_thread
- * This the kernel thread that processes edac operations
- * in a normal thread environment
- */
-static int edac_kernel_thread(void *arg)
-{
- struct bs_thread_info *thread = (struct bs_thread_info *) arg;
-
- /* detach thread */
- daemonize(thread->name);
-
- current->exit_signal = SIGCHLD;
- allow_signal(SIGKILL);
- thread->task = current;
-
- /* indicate to starting task we have started */
- complete(thread->event);
-
- /* loop forever, until we are told to stop */
- while(thread->run != NULL) {
- void (*run)(void);
-
- /* call the function to check the memory controllers */
- run = thread->run;
- if (run)
- run();
-
- if (signal_pending(current))
- flush_signals(current);
-
- /* ensure we are interruptable */
- set_current_state(TASK_INTERRUPTIBLE);
+ mci->ue_count++;
+ mci->csrows[csrow].ue_count++;
- /* goto sleep for the interval */
- schedule_timeout((HZ * poll_msec) / 1000);
- try_to_freeze();
- }
+ /* Generate the DIMM labels from the specified channels */
+ chars = snprintf(pos, len + 1, "%s",
+ mci->csrows[csrow].channels[channela].label);
+ len -= chars;
+ pos += chars;
+ chars = snprintf(pos, len + 1, "-%s",
+ mci->csrows[csrow].channels[channelb].label);
- /* notify waiter that we are exiting */
- complete(thread->event);
+ if (edac_mc_get_log_ue())
+ edac_mc_printk(mci, KERN_EMERG,
+ "UE row %d, channel-a= %d channel-b= %d "
+ "labels \"%s\": %s\n", csrow, channela, channelb,
+ labels, msg);
- return 0;
+ if (edac_mc_get_panic_on_ue())
+ panic("UE row %d, channel-a= %d channel-b= %d "
+ "labels \"%s\": %s\n", csrow, channela,
+ channelb, labels, msg);
}
+EXPORT_SYMBOL(edac_mc_handle_fbd_ue);
-/*
- * edac_mc_init
- * module initialization entry point
+/*************************************************************
+ * On Fully Buffered DIMM modules, this help function is
+ * called to process CE events
*/
-static int __init edac_mc_init(void)
+void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci,
+ unsigned int csrow, unsigned int channel, char *msg)
{
- int ret;
- struct completion event;
-
- printk(KERN_INFO "MC: " __FILE__ " version " 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();
-
- /* perform check for first time to harvest boot leftovers */
- do_edac_check();
-
- /* Create the MC sysfs entires */
- if (edac_sysfs_memctrl_setup()) {
- 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();
- printk(KERN_ERR "EDAC PCI: Error initializing sysfs code\n");
- return -ENODEV;
+ /* Ensure boundary values */
+ if (csrow >= mci->nr_csrows) {
+ /* something is wrong */
+ edac_mc_printk(mci, KERN_ERR,
+ "INTERNAL ERROR: row out of range (%d >= %d)\n",
+ csrow, mci->nr_csrows);
+ edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
+ return;
}
-
- /* Create our kernel thread */
- init_completion(&event);
- bs_thread.event = &event;
- bs_thread.name = "kedac";
- bs_thread.run = do_edac_check;
-
- /* create our kernel thread */
- ret = kernel_thread(edac_kernel_thread, &bs_thread, CLONE_KERNEL);
- if (ret < 0) {
- /* remove the sysfs entries */
- edac_sysfs_memctrl_teardown();
- edac_sysfs_pci_teardown();
- return -ENOMEM;
+ if (channel >= mci->csrows[csrow].nr_channels) {
+ /* something is wrong */
+ edac_mc_printk(mci, KERN_ERR,
+ "INTERNAL ERROR: channel out of range (%d >= %d)\n",
+ channel, mci->csrows[csrow].nr_channels);
+ edac_mc_handle_ce_no_info(mci, "INTERNAL ERROR");
+ return;
}
- /* wait for our kernel theard ack that it is up and running */
- wait_for_completion(&event);
-
- return 0;
-}
-
-
-/*
- * edac_mc_exit()
- * module exit/termination functioni
- */
-static void __exit edac_mc_exit(void)
-{
- struct completion event;
-
- debugf0("MC: " __FILE__ ": %s()\n", __func__);
-
- init_completion(&event);
- bs_thread.event = &event;
+ if (edac_mc_get_log_ce())
+ /* FIXME - put in DIMM location */
+ edac_mc_printk(mci, KERN_WARNING,
+ "CE row %d, channel %d, label \"%s\": %s\n",
+ csrow, channel,
+ mci->csrows[csrow].channels[channel].label, msg);
- /* As soon as ->run is set to NULL, the task could disappear,
- * so we need to hold tasklist_lock until we have sent the signal
- */
- read_lock(&tasklist_lock);
- bs_thread.run = NULL;
- send_sig(SIGKILL, bs_thread.task, 1);
- read_unlock(&tasklist_lock);
- wait_for_completion(&event);
-
- /* tear down the sysfs device */
- edac_sysfs_memctrl_teardown();
- edac_sysfs_pci_teardown();
+ mci->ce_count++;
+ mci->csrows[csrow].ce_count++;
+ mci->csrows[csrow].channels[channel].ce_count++;
}
-
-
-
-
-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");
-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");
-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
+EXPORT_SYMBOL(edac_mc_handle_fbd_ce);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff