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/*
* (C) 2005, 2006 Linux Networx (http://lnxi.com)
* This file may be distributed under the terms of the
* GNU General Public License.
*
* Written Doug Thompson <norsk5@xmission.com>
*
*/
#include <linux/module.h>
#include <linux/sysdev.h>
#include <linux/ctype.h>
#include "edac_core.h"
#include "edac_module.h"
/* Turn off this whole feature if PCI is not configured */
#ifdef CONFIG_PCI
#define EDAC_PCI_SYMLINK "device"
/* data variables exported via sysfs */
static int check_pci_errors; /* default NO check PCI parity */
static int edac_pci_panic_on_pe; /* default NO panic on PCI Parity */
static int edac_pci_log_pe = 1; /* log PCI parity errors */
static int edac_pci_log_npe = 1; /* log PCI non-parity error errors */
static int edac_pci_poll_msec = 1000; /* one second workq period */
static atomic_t pci_parity_count = ATOMIC_INIT(0);
static atomic_t pci_nonparity_count = ATOMIC_INIT(0);
static struct kobject *edac_pci_top_main_kobj;
static atomic_t edac_pci_sysfs_refcount = ATOMIC_INIT(0);
/* getter functions for the data variables */
int edac_pci_get_check_errors(void)
{
return check_pci_errors;
}
static int edac_pci_get_log_pe(void)
{
return edac_pci_log_pe;
}
static int edac_pci_get_log_npe(void)
{
return edac_pci_log_npe;
}
static int edac_pci_get_panic_on_pe(void)
{
return edac_pci_panic_on_pe;
}
int edac_pci_get_poll_msec(void)
{
return edac_pci_poll_msec;
}
/**************************** EDAC PCI sysfs instance *******************/
static ssize_t instance_pe_count_show(struct edac_pci_ctl_info *pci, char *data)
{
return sprintf(data, "%u\n", atomic_read(&pci->counters.pe_count));
}
static ssize_t instance_npe_count_show(struct edac_pci_ctl_info *pci,
char *data)
{
return sprintf(data, "%u\n", atomic_read(&pci->counters.npe_count));
}
#define to_instance(k) container_of(k, struct edac_pci_ctl_info, kobj)
#define to_instance_attr(a) container_of(a, struct instance_attribute, attr)
/* DEVICE instance kobject release() function */
static void edac_pci_instance_release(struct kobject *kobj)
{
struct edac_pci_ctl_info *pci;
debugf0("%s()\n", __func__);
/* Form pointer to containing struct, the pci control struct */
pci = to_instance(kobj);
/* decrement reference count on top main kobj */
kobject_put(edac_pci_top_main_kobj);
kfree(pci); /* Free the control struct */
}
/* instance specific attribute structure */
struct instance_attribute {
struct attribute attr;
ssize_t(*show) (struct edac_pci_ctl_info *, char *);
ssize_t(*store) (struct edac_pci_ctl_info *, const char *, size_t);
};
/* Function to 'show' fields from the edac_pci 'instance' structure */
static ssize_t edac_pci_instance_show(struct kobject *kobj,
struct attribute *attr, char *buffer)
{
struct edac_pci_ctl_info *pci = to_instance(kobj);
struct instance_attribute *instance_attr = to_instance_attr(attr);
if (instance_attr->show)
return instance_attr->show(pci, buffer);
return -EIO;
}
/* Function to 'store' fields into the edac_pci 'instance' structure */
static ssize_t edac_pci_instance_store(struct kobject *kobj,
struct attribute *attr,
const char *buffer, size_t count)
{
struct edac_pci_ctl_info *pci = to_instance(kobj);
struct instance_attribute *instance_attr = to_instance_attr(attr);
if (instance_attr->store)
return instance_attr->store(pci, buffer, count);
return -EIO;
}
/* fs_ops table */
static struct sysfs_ops pci_instance_ops = {
.show = edac_pci_instance_show,
.store = edac_pci_instance_store
};
#define INSTANCE_ATTR(_name, _mode, _show, _store) \
static struct instance_attribute attr_instance_##_name = { \
.attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
};
INSTANCE_ATTR(pe_count, S_IRUGO, instance_pe_count_show, NULL);
INSTANCE_ATTR(npe_count, S_IRUGO, instance_npe_count_show, NULL);
/* pci instance attributes */
static struct instance_attribute *pci_instance_attr[] = {
&attr_instance_pe_count,
&attr_instance_npe_count,
NULL
};
/* the ktype for a pci instance */
static struct kobj_type ktype_pci_instance = {
.release = edac_pci_instance_release,
.sysfs_ops = &pci_instance_ops,
.default_attrs = (struct attribute **)pci_instance_attr,
};
/*
* edac_pci_create_instance_kobj
*
* construct one EDAC PCI instance's kobject for use
*/
static int edac_pci_create_instance_kobj(struct edac_pci_ctl_info *pci, int idx)
{
struct kobject *main_kobj;
int err;
debugf0("%s()\n", __func__);
/* First bump the ref count on the top main kobj, which will
* track the number of PCI instances we have, and thus nest
* properly on keeping the module loaded
*/
main_kobj = kobject_get(edac_pci_top_main_kobj);
if (!main_kobj) {
err = -ENODEV;
goto error_out;
}
/* And now register this new kobject under the main kobj */
err = kobject_init_and_add(&pci->kobj, &ktype_pci_instance,
edac_pci_top_main_kobj, "pci%d", idx);
if (err != 0) {
debugf2("%s() failed to register instance pci%d\n",
__func__, idx);
kobject_put(edac_pci_top_main_kobj);
goto error_out;
}
kobject_uevent(&pci->kobj, KOBJ_ADD);
debugf1("%s() Register instance 'pci%d' kobject\n", __func__, idx);
return 0;
/* Error unwind statck */
error_out:
return err;
}
/*
* edac_pci_unregister_sysfs_instance_kobj
*
* unregister the kobj for the EDAC PCI instance
*/
static void edac_pci_unregister_sysfs_instance_kobj(
struct edac_pci_ctl_info *pci)
{
debugf0("%s()\n", __func__);
/* Unregister the instance kobject and allow its release
* function release the main reference count and then
* kfree the memory
*/
kobject_put(&pci->kobj);
}
/***************************** EDAC PCI sysfs root **********************/
#define to_edacpci(k) container_of(k, struct edac_pci_ctl_info, kobj)
#define to_edacpci_attr(a) container_of(a, struct edac_pci_attr, attr)
/* simple show/store functions for attributes */
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, N
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