/*
* edac_mc kernel module
- * (C) 2005, 2006 Linux Networx (http://lnxi.com)
+ * (C) 2005 Linux Networx (http://lnxi.com)
* This file may be distributed under the terms of the
* GNU General Public License.
*
*
*/
+
+#include <linux/config.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/sysdev.h>
#include <linux/ctype.h>
-#include <linux/kthread.h>
+
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/edac.h>
+
#include "edac_mc.h"
-#define EDAC_MC_VERSION "Ver: 2.0.1 " __DATE__
+#define EDAC_MC_VERSION "edac_mc Ver: 2.0.0 " __DATE__
+/* For now, disable the EDAC sysfs code. The sysfs interface that EDAC
+ * presents to user space needs more thought, and is likely to change
+ * substantially.
+ */
+#define DISABLE_EDAC_SYSFS
#ifdef CONFIG_EDAC_DEBUG
/* Values of 0 to 4 will generate output */
int edac_debug_level = 1;
-EXPORT_SYMBOL_GPL(edac_debug_level);
+EXPORT_SYMBOL(edac_debug_level);
#endif
/* EDAC Controls, setable by module parameter, and sysfs */
static int panic_on_ue;
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);
-static struct task_struct *edac_thread;
+/* Structure of the whitelist and blacklist arrays */
+struct edac_pci_device_list {
+ unsigned int vendor; /* Vendor ID */
+ unsigned int device; /* Deviice ID */
+};
-#ifdef CONFIG_PCI
-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);
-static struct kobject edac_pci_kobj; /* /sys/devices/system/edac/pci */
-static struct completion edac_pci_kobj_complete;
-#endif /* CONFIG_PCI */
+#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 */
+#ifndef DISABLE_EDAC_SYSFS
static const char *mem_types[] = {
[MEM_EMPTY] = "Empty",
[EDAC_S16ECD16ED] = "S16ECD16ED"
};
+
/* sysfs object: /sys/devices/system/edac */
static struct sysdev_class edac_class = {
set_kset_name("edac"),
};
-/* sysfs object:
+/* sysfs objects:
* /sys/devices/system/edac/mc
+ * /sys/devices/system/edac/pci
*/
static struct kobject edac_memctrl_kobj;
-
-/* We use these to wait for the reference counts on edac_memctrl_kobj and
- * edac_pci_kobj to reach 0.
- */
-static struct completion edac_memctrl_kobj_complete;
+static struct kobject edac_pci_kobj;
/*
* /sys/devices/system/edac/mc;
- * data structures and methods
+ * data structures and methods
*/
+#if 0
+static ssize_t memctrl_string_show(void *ptr, char *buffer)
+{
+ char *value = (char*) ptr;
+ return sprintf(buffer, "%s\n", value);
+}
+#endif
+
static ssize_t memctrl_int_show(void *ptr, char *buffer)
{
int *value = (int*) ptr;
- return sprintf(buffer, "%u\n", *value);
+ return sprintf(buffer, "%d\n", *value);
}
static ssize_t memctrl_int_store(void *ptr, const char *buffer, size_t count)
}
struct memctrl_dev_attribute {
- struct attribute attr;
- void *value;
+ 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)
+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)
+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;
}
.store = _store, \
};
+/* cwrow<id> attribute f*/
+#if 0
+MEMCTRL_STRING_ATTR(mc_version,EDAC_MC_VERSION,S_IRUGO,memctrl_string_show,NULL);
+#endif
+
/* 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,
/* Main MC kobject release() function */
static void edac_memctrl_master_release(struct kobject *kobj)
{
- debugf1("%s()\n", __func__);
- complete(&edac_memctrl_kobj_complete);
+ 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,
+ .release = edac_memctrl_master_release,
+ .sysfs_ops = &memctrlfs_ops,
+ .default_attrs = (struct attribute **) memctrl_attr,
};
+#endif /* DISABLE_EDAC_SYSFS */
+
/* Initialize the main sysfs entries for edac:
* /sys/devices/system/edac
*
* !0 FAILURE
*/
static int edac_sysfs_memctrl_setup(void)
+#ifdef DISABLE_EDAC_SYSFS
+{
+ return 0;
+}
+#else
{
int err=0;
- debugf1("%s()\n", __func__);
+ 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)
+ if (err) {
debugf1("Failed to register '.../edac/mc'\n");
- else
+ } else {
debugf1("Registered '.../edac/mc' kobject\n");
+ }
}
- } else
- debugf1("%s() error=%d\n", __func__, err);
+ } else {
+ debugf1(KERN_WARNING "__FILE__ %s() error=%d\n", __func__,err);
+ }
return err;
}
+#endif /* DISABLE_EDAC_SYSFS */
/*
* MC teardown:
*/
static void edac_sysfs_memctrl_teardown(void)
{
+#ifndef DISABLE_EDAC_SYSFS
debugf0("MC: " __FILE__ ": %s()\n", __func__);
- /* Unregister the MC's kobject and wait for reference count to reach
- * 0.
- */
- init_completion(&edac_memctrl_kobj_complete);
+ /* Unregister the MC's kobject */
kobject_unregister(&edac_memctrl_kobj);
- wait_for_completion(&edac_memctrl_kobj_complete);
+
+ /* release the master edac mc kobject */
+ kobject_put(&edac_memctrl_kobj);
/* Unregister the 'edac' object */
sysdev_class_unregister(&edac_class);
+#endif /* DISABLE_EDAC_SYSFS */
}
-#ifdef CONFIG_PCI
+#ifndef DISABLE_EDAC_SYSFS
+
+/*
+ * /sys/devices/system/edac/pci;
+ * data structures and methods
+ */
+
+struct list_control {
+ struct edac_pci_device_list *list;
+ int *count;
+};
+
+
+#if 0
+/* 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;
+}
+
+#endif
static ssize_t edac_pci_int_show(void *ptr, char *buffer)
{
int *value = ptr;
}
struct edac_pci_dev_attribute {
- struct attribute attr;
- void *value;
+ 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)
+ char *buffer)
{
struct edac_pci_dev_attribute *edac_pci_dev;
edac_pci_dev= (struct edac_pci_dev_attribute*)attr;
return -EIO;
}
-static ssize_t edac_pci_dev_store(struct kobject *kobj,
- struct attribute *attr, const char *buffer, size_t count)
+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;
.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 }, \
.store = _store, \
};
+#if 0
+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);
+#endif
+
/* 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);
+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[] = {
/* No memory to release */
static void edac_pci_release(struct kobject *kobj)
{
- debugf1("%s()\n", __func__);
- complete(&edac_pci_kobj_complete);
+ 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,
+ .release = edac_pci_release,
+ .sysfs_ops = &edac_pci_sysfs_ops,
+ .default_attrs = (struct attribute **) edac_pci_attr,
};
+#endif /* DISABLE_EDAC_SYSFS */
+
/**
* edac_sysfs_pci_setup()
*
*/
static int edac_sysfs_pci_setup(void)
+#ifdef DISABLE_EDAC_SYSFS
+{
+ return 0;
+}
+#else
{
int err;
- debugf1("%s()\n", __func__);
+ 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");
+ 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;
}
+#endif /* DISABLE_EDAC_SYSFS */
static void edac_sysfs_pci_teardown(void)
{
- debugf0("%s()\n", __func__);
- init_completion(&edac_pci_kobj_complete);
+#ifndef DISABLE_EDAC_SYSFS
+ debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
kobject_unregister(&edac_pci_kobj);
- wait_for_completion(&edac_pci_kobj_complete);
+ kobject_put(&edac_pci_kobj);
+#endif
}
+#ifndef DISABLE_EDAC_SYSFS
-static u16 get_pci_parity_status(struct pci_dev *dev, int secondary)
+/* 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)
{
- int where;
- u16 status;
+ ssize_t size = 0;
- where = secondary ? PCI_SEC_STATUS : PCI_STATUS;
- pci_read_config_word(dev, where, &status);
+ if (csrow->nr_channels > 0) {
+ size = snprintf(data, EDAC_MC_LABEL_LEN,"%s\n",
+ csrow->channels[0].label);
+ }
+ return size;
+}
- /* 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
- */
+static ssize_t csrow_ch1_dimm_label_show(struct csrow_info *csrow, char *data)
+{
+ ssize_t size = 0;
- if (status == 0xFFFF) {
- u32 sanity;
+ if (csrow->nr_channels > 0) {
+ size = snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
+ csrow->channels[1].label);
+ }
+ return size;
+}
- pci_read_config_dword(dev, 0, &sanity);
+static ssize_t csrow_ch0_dimm_label_store(struct csrow_info *csrow,
+ const char *data, size_t size)
+{
+ ssize_t max_size = 0;
- if (sanity == 0xFFFFFFFF)
- return 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;
+}
- status &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR |
- PCI_STATUS_PARITY;
+static ssize_t csrow_ch1_dimm_label_store(struct csrow_info *csrow,
+ const char *data, size_t size)
+{
+ ssize_t max_size = 0;
- if (status)
- /* reset only the bits we are interested in */
- pci_write_config_word(dev, where, status);
+ 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;
+}
- return status;
+static ssize_t csrow_ue_count_show(struct csrow_info *csrow, char *data)
+{
+ return sprintf(data,"%u\n", csrow->ue_count);
}
-typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev);
+static ssize_t csrow_ce_count_show(struct csrow_info *csrow, char *data)
+{
+ return sprintf(data,"%u\n", csrow->ce_count);
+}
-/* Clear any PCI parity errors logged by this device. */
-static void edac_pci_dev_parity_clear(struct pci_dev *dev)
+static ssize_t csrow_ch0_ce_count_show(struct csrow_info *csrow, char *data)
{
- u8 header_type;
+ ssize_t size = 0;
- get_pci_parity_status(dev, 0);
+ if (csrow->nr_channels > 0) {
+ size = sprintf(data,"%u\n", csrow->channels[0].ce_count);
+ }
+ return size;
+}
- /* read the device TYPE, looking for bridges */
- pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
+static ssize_t csrow_ch1_ce_count_show(struct csrow_info *csrow, char *data)
+{
+ ssize_t size = 0;
- if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE)
- get_pci_parity_status(dev, 1);
+ if (csrow->nr_channels > 1) {
+ size = sprintf(data,"%u\n", csrow->channels[1].ce_count);
+ }
+ return size;
}
-/*
- * PCI Parity polling
- *
- */
-static void edac_pci_dev_parity_test(struct pci_dev *dev)
+static ssize_t csrow_size_show(struct csrow_info *csrow, char *data)
{
- u16 status;
- u8 header_type;
+ return sprintf(data,"%u\n", PAGES_TO_MiB(csrow->nr_pages));
+}
- /* read the STATUS register on this device
- */
- status = get_pci_parity_status(dev, 0);
+static ssize_t csrow_mem_type_show(struct csrow_info *csrow, char *data)
+{
+ return sprintf(data,"%s\n", mem_types[csrow->mtype]);
+}
- debugf2("PCI STATUS= 0x%04x %s\n", status, dev->dev.bus_id );
+static ssize_t csrow_dev_type_show(struct csrow_info *csrow, char *data)
+{
+ return sprintf(data,"%s\n", dev_types[csrow->dtype]);
+}
- /* check the status reg for errors */
- if (status) {
- if (status & (PCI_STATUS_SIG_SYSTEM_ERROR))
- edac_printk(KERN_CRIT, EDAC_PCI,
- "Signaled System Error on %s\n",
- pci_name(dev));
+static ssize_t csrow_edac_mode_show(struct csrow_info *csrow, char *data)
+{
+ return sprintf(data,"%s\n", edac_caps[csrow->edac_mode]);
+}
- if (status & (PCI_STATUS_PARITY)) {
- edac_printk(KERN_CRIT, EDAC_PCI,
- "Master Data Parity Error on %s\n",
- pci_name(dev));
+struct csrowdev_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct csrow_info *,char *);
+ ssize_t (*store)(struct csrow_info *, const char *,size_t);
+};
- atomic_inc(&pci_parity_count);
- }
+#define to_csrow(k) container_of(k, struct csrow_info, kobj)
+#define to_csrowdev_attr(a) container_of(a, struct csrowdev_attribute, attr)
- if (status & (PCI_STATUS_DETECTED_PARITY)) {
- edac_printk(KERN_CRIT, EDAC_PCI,
- "Detected Parity Error on %s\n",
- pci_name(dev));
+/* 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);
- atomic_inc(&pci_parity_count);
- }
- }
+ if (csrowdev_attr->show)
+ return csrowdev_attr->show(csrow, buffer);
+ return -EIO;
+}
- /* read the device TYPE, looking for bridges */
- pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
+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);
- debugf2("PCI HEADER TYPE= 0x%02x %s\n", header_type, dev->dev.bus_id );
+ if (csrowdev_attr->store)
+ return csrowdev_attr->store(csrow, buffer, count);
+ return -EIO;
+}
- if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
- /* On bridges, need to examine secondary status register */
- status = get_pci_parity_status(dev, 1);
+static struct sysfs_ops csrowfs_ops = {
+ .show = csrowdev_show,
+ .store = csrowdev_store
+};
- debugf2("PCI SEC_STATUS= 0x%04x %s\n",
- status, dev->dev.bus_id );
+#define CSROWDEV_ATTR(_name,_mode,_show,_store) \
+struct csrowdev_attribute attr_##_name = { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+};
- /* 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));
+/* 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);
- 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);
- }
+/* 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,
+};
- 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 */
+/* No memory to release */
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);
+ debugf1("EDAC MC: " __FILE__ ": %s()\n", __func__);
}
-/* 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,
+ .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)
+static int edac_create_csrow_object(struct kobject *edac_mci_kobj,
+ struct csrow_info *csrow, int index )
{
int err = 0;
- int chan;
+
+ 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)
- 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;
- }
+ /* 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);
}
-error_exit:
return err;
}
-/* default sysfs methods and data structures for the main MCI kobject */
+/* 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)
+static ssize_t mci_reset_counters_store(struct mem_ctl_info *mci,
+ const char *data, size_t count )
{
int row, chan;
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);
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;
if (!csrow->nr_pages)
continue;
-
total_pages += csrow->nr_pages;
}
}
struct mcidev_attribute {
- struct attribute attr;
+ 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)
+ 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)
+ 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
+ .show = mcidev_show,
+ .store = mcidev_store
};
#define MCIDEV_ATTR(_name,_mode,_show,_store) \
.store = _store, \
};
-/* default Control file */
+/* Control file */
MCIDEV_ATTR(reset_counters,S_IWUSR,NULL,mci_reset_counters_store);
-/* default Attribute files */
+/* 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,
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);
- mci = to_mci(kobj);
- debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
- complete(&mci->kobj_complete);
+ kfree(mci);
}
static struct kobj_type ktype_mci = {
- .release = edac_mci_instance_release,
- .sysfs_ops = &mci_ops,
- .default_attrs = (struct attribute **) mci_attr,
+ .release = edac_mci_instance_release,
+ .sysfs_ops = &mci_ops,
+ .default_attrs = (struct attribute **) mci_attr,
};
+#endif /* DISABLE_EDAC_SYSFS */
#define EDAC_DEVICE_SYMLINK "device"
* !0 Failure
*/
static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
+#ifdef DISABLE_EDAC_SYSFS
+{
+ return 0;
+}
+#else
{
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);
+ 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);
return err;
/* create a symlink for the device */
- err = sysfs_create_link(edac_mci_kobj, &mci->dev->kobj,
+ err = sysfs_create_link(edac_mci_kobj, &mci->pdev->dev.kobj,
EDAC_DEVICE_SYMLINK);
- if (err)
- goto fail0;
+ 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 fail1;
+ 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, */
-fail1:
+fail:
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);
+ kobject_put(&mci->csrows[i].kobj);
}
}
-fail0:
- init_completion(&mci->kobj_complete);
kobject_unregister(edac_mci_kobj);
- wait_for_completion(&mci->kobj_complete);
+ kobject_put(edac_mci_kobj);
+
return err;
}
+#endif /* DISABLE_EDAC_SYSFS */
/*
* remove a Memory Controller instance
*/
static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
{
+#ifndef DISABLE_EDAC_SYSFS
int i;
- debugf0("%s()\n", __func__);
+ 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) {
- init_completion(&mci->csrows[i].kobj_complete);
+ if (mci->csrows[i].nr_pages > 0) {
kobject_unregister(&mci->csrows[i].kobj);
- wait_for_completion(&mci->csrows[i].kobj_complete);
+ kobject_put(&mci->csrows[i].kobj);
}
}
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);
+ kobject_put(&mci->edac_mci_kobj);
+#endif /* DISABLE_EDAC_SYSFS */
}
/* END OF sysfs data and methods */
#ifdef CONFIG_EDAC_DEBUG
+EXPORT_SYMBOL(edac_mc_dump_channel);
+
void edac_mc_dump_channel(struct channel_info *chan)
{
debugf4("\tchannel = %p\n", chan);
debugf4("\tchannel->label = '%s'\n", chan->label);
debugf4("\tchannel->csrow = %p\n\n", chan->csrow);
}
-EXPORT_SYMBOL_GPL(edac_mc_dump_channel);
+
+
+EXPORT_SYMBOL(edac_mc_dump_csrow);
void edac_mc_dump_csrow(struct csrow_info *csrow)
{
debugf4("\tcsrow->channels = %p\n", csrow->channels);
debugf4("\tcsrow->mci = %p\n\n", csrow->mci);
}
-EXPORT_SYMBOL_GPL(edac_mc_dump_csrow);
+
+
+EXPORT_SYMBOL(edac_mc_dump_mci);
void edac_mc_dump_mci(struct mem_ctl_info *mci)
{
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("\tpdev = %p\n", mci->pdev);
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 */
+
+#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
* 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)
+static inline char * align_ptr (void *ptr, unsigned size)
{
unsigned align, r;
return (char *) (((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)
{
struct mem_ctl_info *mci;
struct csrow_info *csi, *csrow;
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 */
+ memset(mci, 0, size); /* clear all fields */
+
mci->csrows = csi;
mci->pvt_info = pvt;
mci->nr_csrows = nr_csrows;
return mci;
}
-EXPORT_SYMBOL_GPL(edac_mc_alloc);
+
+
+EXPORT_SYMBOL(edac_mc_free);
/**
* edac_mc_free: Free a previously allocated 'mci' structure
* @mci: pointer to a struct mem_ctl_info structure
+ *
+ * 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().
+ *
+ * VOID Return
*/
void edac_mc_free(struct mem_ctl_info *mci)
{
- kfree(mci);
+ /* 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);
}
-EXPORT_SYMBOL_GPL(edac_mc_free);
-static struct mem_ctl_info *find_mci_by_dev(struct device *dev)
+
+
+EXPORT_SYMBOL(edac_mc_find_mci_by_pdev);
+
+struct mem_ctl_info *edac_mc_find_mci_by_pdev(struct pci_dev *pdev)
{
struct mem_ctl_info *mci;
struct list_head *item;
- debugf3("%s()\n", __func__);
+ debugf3("MC: " __FILE__ ": %s()\n", __func__);
list_for_each(item, &mc_devices) {
mci = list_entry(item, struct mem_ctl_info, link);
- if (mci->dev == dev)
+ if (mci->pdev == pdev)
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;
+ int i;
- insert_before = &mc_devices;
+ 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;
+ }
- if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL))
- goto fail0;
+ insert_before = NULL;
+ i = 0;
- list_for_each(item, &mc_devices) {
- p = list_entry(item, struct mem_ctl_info, link);
+ 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;
+ if (p->mc_idx != i) {
+ insert_before = item;
+ break;
+ }
- insert_before = item;
- break;
+ i++;
}
- }
- 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->mc_idx = i;
- mci = container_of(head, struct mem_ctl_info, rcu);
- INIT_LIST_HEAD(&mci->link);
- complete(&mci->complete);
-}
+ if (insert_before == NULL)
+ insert_before = &mc_devices;
+ }
-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);
+ list_add_tail_rcu(&mci->link, insert_before);
+ return 0;
}
-/**
- * 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;
- list_for_each(item, &mc_devices) {
- mci = list_entry(item, struct mem_ctl_info, link);
-
- if (mci->mc_idx >= idx) {
- if (mci->mc_idx == idx)
- return mci;
- break;
- }
- }
-
- return NULL;
-}
-EXPORT_SYMBOL(edac_mc_find);
+EXPORT_SYMBOL(edac_mc_add_mc);
/**
- * edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
- * create sysfs entries associated with mci structure
+ * edac_mc_add_mc: Insert the 'mci' structure into the mci global list
* @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 mc_idx)
+int edac_mc_add_mc(struct mem_ctl_info *mci)
{
- debugf0("%s()\n", __func__);
- mci->mc_idx = mc_idx;
+ int rc = 1;
+
+ 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]);
+ edac_mc_dump_channel(&mci->csrows[i].
+ channels[j]);
}
}
#endif
down(&mem_ctls_mutex);
if (add_mc_to_global_list(mci))
- goto fail0;
+ goto finish;
/* 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;
+ 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;
}
/* 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));
+ 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));
- up(&mem_ctls_mutex);
- return 0;
-fail1:
- del_mc_from_global_list(mci);
+ rc = 0;
-fail0:
+finish:
up(&mem_ctls_mutex);
- return 1;
+ return rc;
+}
+
+
+
+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);
}
-EXPORT_SYMBOL_GPL(edac_mc_add_mc);
+
+EXPORT_SYMBOL(edac_mc_del_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.
+ * edac_mc_del_mc: Remove the specified mci structure from global list
+ * @mci: Pointer to struct mem_ctl_info structure
*
- * Return pointer to removed mci structure, or NULL if device not found.
+ * Returns:
+ * 0 Success
+ * 1 Failure
*/
-struct mem_ctl_info * edac_mc_del_mc(struct device *dev)
+int edac_mc_del_mc(struct mem_ctl_info *mci)
{
- struct mem_ctl_info *mci;
+ int rc = 1;
- debugf0("MC: %s()\n", __func__);
+ debugf0("MC%d: " __FILE__ ": %s()\n", mci->mc_idx, __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);
+ 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);
- 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;
+
+ return rc;
}
-EXPORT_SYMBOL_GPL(edac_mc_del_mc);
-void edac_mc_scrub_block(unsigned long page, unsigned long offset, u32 size)
+
+EXPORT_SYMBOL(edac_mc_scrub_block);
+
+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__);
+ debugf3("MC: " __FILE__ ": %s()\n", __func__);
/* ECC error page was not in our memory. Ignore it. */
if(!pfn_valid(page))
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)
+EXPORT_SYMBOL(edac_mc_find_csrow_by_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: %s(): 0x%lx\n", mci->mc_idx, __func__, page);
+ debugf1("MC%d: " __FILE__ ": %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: %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: " __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);
if ((page >= csrow->first_page) &&
(page <= csrow->last_page) &&
}
if (row == -1)
- edac_mc_printk(mci, KERN_ERR,
- "could not look up page error address %lx\n",
- (unsigned long) page);
+ printk(KERN_ERR
+ "EDAC MC%d: could not look up page error address %lx\n",
+ mci->mc_idx, (unsigned long) page);
return row;
}
-EXPORT_SYMBOL_GPL(edac_mc_find_csrow_by_page);
+
+
+EXPORT_SYMBOL(edac_mc_handle_ce);
/* 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: %s()\n", mci->mc_idx, __func__);
+ debugf3("MC%d: " __FILE__ ": %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);
+ printk(KERN_ERR
+ "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n",
+ mci->mc_idx, 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);
+ 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_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);
+ 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);
mci->ce_count++;
mci->csrows[row].ce_count++;
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);
-void edac_mc_handle_ce_no_info(struct mem_ctl_info *mci, const char *msg)
+
+EXPORT_SYMBOL(edac_mc_handle_ce_no_info);
+
+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);
-
+ printk(KERN_WARNING
+ "EDAC MC%d: CE - no information available: %s\n",
+ mci->mc_idx, msg);
mci->ce_noinfo_count++;
mci->ce_count++;
}
-EXPORT_SYMBOL_GPL(edac_mc_handle_ce_no_info);
+
+
+EXPORT_SYMBOL(edac_mc_handle_ue);
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: %s()\n", mci->mc_idx, __func__);
+ debugf3("MC%d: " __FILE__ ": %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);
+ printk(KERN_ERR
+ "EDAC MC%d: INTERNAL ERROR: row out of range (%d >= %d)\n",
+ mci->mc_idx, 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);
+ 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);
+ 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);
+ 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 (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);
+ 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)
+
+EXPORT_SYMBOL(edac_mc_handle_ue_no_info);
+
+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);
+ printk(KERN_WARNING
+ "EDAC MC%d: UE - no information available: %s\n",
+ mci->mc_idx, 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
+ */
+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) {
+
+ /* 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);
+ }
+ }
+}
+
+static void do_pci_parity_check(void)
+{
+ unsigned long flags;
+ int before_count;
+
+ debugf3("MC: " __FILE__ ": %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 */
+
+
+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)
+static inline void check_mc_devices (void)
{
+ unsigned long flags;
struct list_head *item;
struct mem_ctl_info *mci;
- debugf3("%s()\n", __func__);
- down(&mem_ctls_mutex);
+ 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);
mci->edac_check(mci);
}
- up(&mem_ctls_mutex);
+ local_irq_restore(flags);
}
+
/*
* Check MC status every poll_msec.
* Check PCI status every poll_msec as well.
*/
static void do_edac_check(void)
{
- debugf3("%s()\n", __func__);
+
+ 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)
{
- while (!kthread_should_stop()) {
- do_edac_check();
+ 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);
/* goto sleep for the interval */
- schedule_timeout_interruptible((HZ * poll_msec) / 1000);
+ schedule_timeout((HZ * poll_msec) / 1000);
try_to_freeze();
}
+ /* notify waiter that we are exiting */
+ complete(thread->event);
+
return 0;
}
*/
static int __init edac_mc_init(void)
{
- edac_printk(KERN_INFO, EDAC_MC, EDAC_MC_VERSION "\n");
+ int ret;
+ struct completion event;
+
+ printk(KERN_INFO "MC: " __FILE__ " version " EDAC_MC_VERSION "\n");
/*
* Harvest and clear any boot/initialization PCI parity errors
*/
clear_pci_parity_errors();
- /* Create the MC sysfs entries */
+ /* perform check for first time to harvest boot leftovers */
+ do_edac_check();
+
+ /* Create the MC sysfs entires */
if (edac_sysfs_memctrl_setup()) {
- edac_printk(KERN_ERR, EDAC_MC,
- "Error initializing sysfs code\n");
+ 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");
+ printk(KERN_ERR "EDAC PCI: Error initializing sysfs code\n");
return -ENODEV;
}
- /* create our kernel thread */
- edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac");
+ /* Create our kernel thread */
+ init_completion(&event);
+ bs_thread.event = &event;
+ bs_thread.name = "kedac";
+ bs_thread.run = do_edac_check;
- if (IS_ERR(edac_thread)) {
+ /* 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 PTR_ERR(edac_thread);
+ return -ENOMEM;
}
+ /* 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)
{
- debugf0("%s()\n", __func__);
- kthread_stop(edac_thread);
+ struct completion event;
+
+ debugf0("MC: " __FILE__ ": %s()\n", __func__);
+
+ init_completion(&event);
+ bs_thread.event = &event;
+
+ /* 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();
}
+
+
+
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");
+ "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);
git://git.onelab.eu / linux-2.6.git / blobdiff