--- /dev/null
+/*
+ * (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/edac.h>
+#include <linux/slab.h>
+#include <linux/ctype.h>
+
+#include "edac_core.h"
+#include "edac_module.h"
+
+#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;
+
+ edac_dbg(0, "\n");
+
+ /* 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 const 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;
+
+ edac_dbg(0, "\n");
+
+ /* 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) {
+ edac_dbg(2, "failed to register instance pci%d\n", idx);
+ kobject_put(edac_pci_top_main_kobj);
+ goto error_out;
+ }
+
+ kobject_uevent(&pci->kobj, KOBJ_ADD);
+ edac_dbg(1, "Register instance 'pci%d' kobject\n", 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)
+{
+ edac_dbg(0, "\n");
+
+ /* 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, 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->store)
+ return edac_pci_dev->store(edac_pci_dev->value, buffer, count);
+ return -EIO;
+}
+
+static const 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) \
+static 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) \
+static struct edac_pci_dev_attribute edac_pci_attr_##_name = { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .value = _data, \
+ .show = _show, \
+ .store = _store, \
+};
+
+/* PCI Parity control files */
+EDAC_PCI_ATTR(check_pci_errors, S_IRUGO | S_IWUSR, edac_pci_int_show,
+ edac_pci_int_store);
+EDAC_PCI_ATTR(edac_pci_log_pe, S_IRUGO | S_IWUSR, edac_pci_int_show,
+ edac_pci_int_store);
+EDAC_PCI_ATTR(edac_pci_log_npe, S_IRUGO | S_IWUSR, edac_pci_int_show,
+ edac_pci_int_store);
+EDAC_PCI_ATTR(edac_pci_panic_on_pe, 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(pci_nonparity_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_errors,
+ &edac_pci_attr_edac_pci_log_pe,
+ &edac_pci_attr_edac_pci_log_npe,
+ &edac_pci_attr_edac_pci_panic_on_pe,
+ &edac_pci_attr_pci_parity_count,
+ &edac_pci_attr_pci_nonparity_count,
+ NULL,
+};
+
+/*
+ * edac_pci_release_main_kobj
+ *
+ * This release function is called when the reference count to the
+ * passed kobj goes to zero.
+ *
+ * This kobj is the 'main' kobject that EDAC PCI instances
+ * link to, and thus provide for proper nesting counts
+ */
+static void edac_pci_release_main_kobj(struct kobject *kobj)
+{
+ edac_dbg(0, "here to module_put(THIS_MODULE)\n");
+
+ kfree(kobj);
+
+ /* last reference to top EDAC PCI kobject has been removed,
+ * NOW release our ref count on the core module
+ */
+ module_put(THIS_MODULE);
+}
+
+/* ktype struct for the EDAC PCI main kobj */
+static struct kobj_type ktype_edac_pci_main_kobj = {
+ .release = edac_pci_release_main_kobj,
+ .sysfs_ops = &edac_pci_sysfs_ops,
+ .default_attrs = (struct attribute **)edac_pci_attr,
+};
+
+/**
+ * edac_pci_main_kobj_setup()
+ *
+ * setup the sysfs for EDAC PCI attributes
+ * assumes edac_subsys has already been initialized
+ */
+static int edac_pci_main_kobj_setup(void)
+{
+ int err;
+ struct bus_type *edac_subsys;
+
+ edac_dbg(0, "\n");
+
+ /* check and count if we have already created the main kobject */
+ if (atomic_inc_return(&edac_pci_sysfs_refcount) != 1)
+ return 0;
+
+ /* First time, so create the main kobject and its
+ * controls and attributes
+ */
+ edac_subsys = edac_get_sysfs_subsys();
+ if (edac_subsys == NULL) {
+ edac_dbg(1, "no edac_subsys\n");
+ err = -ENODEV;
+ goto decrement_count_fail;
+ }
+
+ /* Bump the reference count on this module to ensure the
+ * modules isn't unloaded until we deconstruct the top
+ * level main kobj for EDAC PCI
+ */
+ if (!try_module_get(THIS_MODULE)) {
+ edac_dbg(1, "try_module_get() failed\n");
+ err = -ENODEV;
+ goto mod_get_fail;
+ }
+
+ edac_pci_top_main_kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
+ if (!edac_pci_top_main_kobj) {
+ edac_dbg(1, "Failed to allocate\n");
+ err = -ENOMEM;
+ goto kzalloc_fail;
+ }
+
+ /* Instanstiate the pci object */
+ err = kobject_init_and_add(edac_pci_top_main_kobj,
+ &ktype_edac_pci_main_kobj,
+ &edac_subsys->dev_root->kobj, "pci");
+ if (err) {
+ edac_dbg(1, "Failed to register '.../edac/pci'\n");
+ goto kobject_init_and_add_fail;
+ }
+
+ /* At this point, to 'release' the top level kobject
+ * for EDAC PCI, then edac_pci_main_kobj_teardown()
+ * must be used, for resources to be cleaned up properly
+ */
+ kobject_uevent(edac_pci_top_main_kobj, KOBJ_ADD);
+ edac_dbg(1, "Registered '.../edac/pci' kobject\n");
+
+ return 0;
+
+ /* Error unwind statck */
+kobject_init_and_add_fail:
+ kfree(edac_pci_top_main_kobj);
+
+kzalloc_fail:
+ module_put(THIS_MODULE);
+
+mod_get_fail:
+ edac_put_sysfs_subsys();
+
+decrement_count_fail:
+ /* if are on this error exit, nothing to tear down */
+ atomic_dec(&edac_pci_sysfs_refcount);
+
+ return err;
+}
+
+/*
+ * edac_pci_main_kobj_teardown()
+ *
+ * if no longer linked (needed) remove the top level EDAC PCI
+ * kobject with its controls and attributes
+ */
+static void edac_pci_main_kobj_teardown(void)
+{
+ edac_dbg(0, "\n");
+
+ /* Decrement the count and only if no more controller instances
+ * are connected perform the unregisteration of the top level
+ * main kobj
+ */
+ if (atomic_dec_return(&edac_pci_sysfs_refcount) == 0) {
+ edac_dbg(0, "called kobject_put on main kobj\n");
+ kobject_put(edac_pci_top_main_kobj);
+ edac_put_sysfs_subsys();
+ }
+}
+
+/*
+ *
+ * edac_pci_create_sysfs
+ *
+ * Create the controls/attributes for the specified EDAC PCI device
+ */
+int edac_pci_create_sysfs(struct edac_pci_ctl_info *pci)
+{
+ int err;
+ struct kobject *edac_kobj = &pci->kobj;
+
+ edac_dbg(0, "idx=%d\n", pci->pci_idx);
+
+ /* create the top main EDAC PCI kobject, IF needed */
+ err = edac_pci_main_kobj_setup();
+ if (err)
+ return err;
+
+ /* Create this instance's kobject under the MAIN kobject */
+ err = edac_pci_create_instance_kobj(pci, pci->pci_idx);
+ if (err)
+ goto unregister_cleanup;
+
+ err = sysfs_create_link(edac_kobj, &pci->dev->kobj, EDAC_PCI_SYMLINK);
+ if (err) {
+ edac_dbg(0, "sysfs_create_link() returned err= %d\n", err);
+ goto symlink_fail;
+ }
+
+ return 0;
+
+ /* Error unwind stack */
+symlink_fail:
+ edac_pci_unregister_sysfs_instance_kobj(pci);
+
+unregister_cleanup:
+ edac_pci_main_kobj_teardown();
+
+ return err;
+}
+
+/*
+ * edac_pci_remove_sysfs
+ *
+ * remove the controls and attributes for this EDAC PCI device
+ */
+void edac_pci_remove_sysfs(struct edac_pci_ctl_info *pci)
+{
+ edac_dbg(0, "index=%d\n", pci->pci_idx);
+
+ /* Remove the symlink */
+ sysfs_remove_link(&pci->kobj, EDAC_PCI_SYMLINK);
+
+ /* remove this PCI instance's sysfs entries */
+ edac_pci_unregister_sysfs_instance_kobj(pci);
+
+ /* Call the main unregister function, which will determine
+ * if this 'pci' is the last instance.
+ * If it is, the main kobject will be unregistered as a result
+ */
+ edac_dbg(0, "calling edac_pci_main_kobj_teardown()\n");
+ edac_pci_main_kobj_teardown();
+}
+
+/************************ PCI error handling *************************/
+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;
+}
+
+
+/* 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
+ *
+ * Function to retrieve the current parity status
+ * and decode it
+ *
+ */
+static void edac_pci_dev_parity_test(struct pci_dev *dev)
+{
+ unsigned long flags;
+ u16 status;
+ u8 header_type;
+
+ /* stop any interrupts until we can acquire the status */
+ local_irq_save(flags);
+
+ /* read the STATUS register on this device */
+ status = get_pci_parity_status(dev, 0);
+
+ /* read the device TYPE, looking for bridges */
+ pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
+
+ local_irq_restore(flags);
+
+ edac_dbg(4, "PCI STATUS= 0x%04x %s\n", status, dev_name(&dev->dev));
+
+ /* check the status reg for errors on boards NOT marked as broken
+ * if broken, we cannot trust any of the status bits
+ */
+ if (status && !dev->broken_parity_status) {
+ if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) {
+ edac_printk(KERN_CRIT, EDAC_PCI,
+ "Signaled System Error on %s\n",
+ pci_name(dev));
+ atomic_inc(&pci_nonparity_count);
+ }
+
+ if (status & (PCI_STATUS_PARITY)) {
+ edac_printk(KERN_CRIT, EDAC_PCI,
+ "Master Data Parity Error on %s\n",
+ pci_name(dev));
+
+ atomic_inc(&pci_parity_count);
+ }
+
+ if (status & (PCI_STATUS_DETECTED_PARITY)) {
+ edac_printk(KERN_CRIT, EDAC_PCI,
+ "Detected Parity Error on %s\n",
+ pci_name(dev));
+
+ atomic_inc(&pci_parity_count);
+ }
+ }
+
+
+ edac_dbg(4, "PCI HEADER TYPE= 0x%02x %s\n",
+ header_type, dev_name(&dev->dev));
+
+ if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
+ /* On bridges, need to examine secondary status register */
+ status = get_pci_parity_status(dev, 1);
+
+ edac_dbg(4, "PCI SEC_STATUS= 0x%04x %s\n",
+ status, dev_name(&dev->dev));
+
+ /* check the secondary status reg for errors,
+ * on NOT broken boards
+ */
+ if (status && !dev->broken_parity_status) {
+ if (status & (PCI_STATUS_SIG_SYSTEM_ERROR)) {
+ edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
+ "Signaled System Error on %s\n",
+ pci_name(dev));
+ atomic_inc(&pci_nonparity_count);
+ }
+
+ if (status & (PCI_STATUS_PARITY)) {
+ edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
+ "Master Data Parity Error on "
+ "%s\n", pci_name(dev));
+
+ atomic_inc(&pci_parity_count);
+ }
+
+ if (status & (PCI_STATUS_DETECTED_PARITY)) {
+ edac_printk(KERN_CRIT, EDAC_PCI, "Bridge "
+ "Detected Parity Error on %s\n",
+ pci_name(dev));
+
+ atomic_inc(&pci_parity_count);
+ }
+ }
+ }
+}
+
+/* reduce some complexity in definition of the iterator */
+typedef void (*pci_parity_check_fn_t) (struct pci_dev *dev);
+
+/*
+ * pci_dev parity list iterator
+ *
+ * Scan the PCI device list 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;
+
+ for_each_pci_dev(dev)
+ fn(dev);
+}
+
+/*
+ * edac_pci_do_parity_check
+ *
+ * performs the actual PCI parity check operation
+ */
+void edac_pci_do_parity_check(void)
+{
+ int before_count;
+
+ edac_dbg(3, "\n");
+
+ /* if policy has PCI check off, leave now */
+ if (!check_pci_errors)
+ return;
+
+ before_count = atomic_read(&pci_parity_count);
+
+ /* scan all PCI devices looking for a Parity Error on devices and
+ * bridges.
+ * The iterator calls pci_get_device() which might sleep, thus
+ * we cannot disable interrupts in this scan.
+ */
+ edac_pci_dev_parity_iterator(edac_pci_dev_parity_test);
+
+ /* Only if operator has selected panic on PCI Error */
+ if (edac_pci_get_panic_on_pe()) {
+ /* If the count is different 'after' from 'before' */
+ if (before_count != atomic_read(&pci_parity_count))
+ panic("EDAC: PCI Parity Error");
+ }
+}
+
+/*
+ * edac_pci_clear_parity_errors
+ *
+ * function to perform an iteration over the PCI devices
+ * and clearn their current status
+ */
+void edac_pci_clear_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);
+}
+
+/*
+ * edac_pci_handle_pe
+ *
+ * Called to handle a PARITY ERROR event
+ */
+void edac_pci_handle_pe(struct edac_pci_ctl_info *pci, const char *msg)
+{
+
+ /* global PE counter incremented by edac_pci_do_parity_check() */
+ atomic_inc(&pci->counters.pe_count);
+
+ if (edac_pci_get_log_pe())
+ edac_pci_printk(pci, KERN_WARNING,
+ "Parity Error ctl: %s %d: %s\n",
+ pci->ctl_name, pci->pci_idx, msg);
+
+ /*
+ * poke all PCI devices and see which one is the troublemaker
+ * panic() is called if set
+ */
+ edac_pci_do_parity_check();
+}
+EXPORT_SYMBOL_GPL(edac_pci_handle_pe);
+
+
+/*
+ * edac_pci_handle_npe
+ *
+ * Called to handle a NON-PARITY ERROR event
+ */
+void edac_pci_handle_npe(struct edac_pci_ctl_info *pci, const char *msg)
+{
+
+ /* global NPE counter incremented by edac_pci_do_parity_check() */
+ atomic_inc(&pci->counters.npe_count);
+
+ if (edac_pci_get_log_npe())
+ edac_pci_printk(pci, KERN_WARNING,
+ "Non-Parity Error ctl: %s %d: %s\n",
+ pci->ctl_name, pci->pci_idx, msg);
+
+ /*
+ * poke all PCI devices and see which one is the troublemaker
+ * panic() is called if set
+ */
+ edac_pci_do_parity_check();
+}
+EXPORT_SYMBOL_GPL(edac_pci_handle_npe);
+
+/*
+ * Define the PCI parameter to the module
+ */
+module_param(check_pci_errors, int, 0644);
+MODULE_PARM_DESC(check_pci_errors,
+ "Check for PCI bus parity errors: 0=off 1=on");
+module_param(edac_pci_panic_on_pe, int, 0644);
+MODULE_PARM_DESC(edac_pci_panic_on_pe,
+ "Panic on PCI Bus Parity error: 0=off 1=on");
Code Review / kvmfornfv.git / blobdiff